EP2695995A2 - Device and method for introducing a hole for inserting a ground anchor into hard soils - Google Patents

Abstract

The device has a pot-shaped bit including a cylindrical pot-shaped downwardly opened body (12). A horizontal planar anvil surface (13) is provided on an upper surface of the downwardly opened body, and a cut point (11) is provided parallel to the planar anvil surface while an opened lower side is provided on the planar anvil surface. A free inner chamber (15) receives excavated soil materials. Outer diameter and cutting height (14) of the pot-shaped bit are provided corresponding to outer diameter and height of a dowel bell. An independent claim is also included for a method for realizing partly preformed holes for an insertion of a tubular base dowel with pot-shaped upper flange and lower driving tip in stone or hard base.

Description

The invention relates to a device and a method for introducing a hole for inserting a soil dowel in hard soils, especially in a ground with asphalt surface, according to the preamble of claims 1 and 11 respectively.

Such a ground anchor is z. B. in the WO 87/02734 described. This ground anchor consists of a tube which has a cup-shaped or bell-shaped, downwardly facing flange at its upper end in the inserted state, while the lower insertion tip preferably has a quadruple fold with intermediate grooves. This device has been well proven when hammered into natural soil, especially in the private sector, in which the dowel used is relatively short (about 40 cm) and so the dowel can be well aligned. In stony or loamy soil, a steel rod is beaten into the ground in advance to pre-pierce. The requirements for the ground anchor and the impact change when the claims are increased. This is true for. As in the installation of road signs, in which easily a post height of 250 cm can be achieved and in which a professional verticality is required. In addition, the length of the anchor must be increased in order to obtain the necessary stability, whereby the impacting is difficult.

In the field of mounting on asphalt are also ground anchors in the execution as described above. The chiselling of the asphalt surface with a spade chisel, however, often succeeds only inaccurate and is very dependent on the skill and experience of the worker. In addition, the chiseling is time consuming.

So is out of the DE 197 08 807 C2 a method for introducing a ground dowel in a ground with asphalt surface known in which first the asphalt surface in a circular area over the flange diameter also cut off and then with a compressor chisel in the bottom of a downwardly tapered - preferably Stepped hole is introduced whose lower portion has a smaller diameter and whose central portion has a larger diameter than the dowel tube and whose near-surface portion has a larger diameter than the dowel flange. In this case, the diameter of the lower portion is chosen so that in this the lower dowel end is clamped so firmly that the upper dowel end is not yet fully turned state schwenkausrichtbar to the vertical. Thereafter, the ground dowel is driven into the hole until the lower edge of the flange comes to rest near the ground level, after which the dowel is (again) pivotally aligned to the vertical. Finally, the flange interior of the ground dowel is largely filled with soft mortar, after which the dowel is fully driven, so that the flange top comes to stand equal to or lower than the ground level.

Also from the prospectus "The root post FERRADIX" Gebr. Sträb GmbH + Co., 73240 Wendlingen / Neckar known, the above-ground anchor u. a. into a ground with asphalt surface in a hole provided for this purpose. It is first drilled or cut into the asphalt surface with a hole saw a hole of about 210 mm and lifted off the asphalt plug thus obtained, whereupon a deeper hole of z. B. about Φ50 x 500 mm is introduced concentrically. Thereafter, the ground dowel is driven into the hole until the lower edge of the flange comes to stand near the ground level, after which there is a pivotal alignment to the vertical. Then the flange interior of the dowel is largely filled with soft mortar, after which the dowel is finally driven completely, so that the flange top comes to the same height or lower than the ground level. The respective pivoting alignment of the hammer with its flange to near the top edge of the dowel is relatively cumbersome, since it is already essentially stuck in the ground over its entire length.

The object of the invention is therefore to provide a device and a method of the type mentioned above, with the / a hole for inserting a ground dowel with bell flange in particular provided with an asphalt surface bottoms in perfect fit to the outer jacket of the flange bell and in depth according to the Height of the flange bell, quickly, safely, aesthetically, ie without injury to the circumference and can be introduced in a simple manner.

This object is achieved by a device having the features of claim 1 and a Vefahren with the features of claim 11 or 13. In the respectively dependent subclaims advantageous further embodiments are described.

Accordingly, the device consists of a cup chisel, which has a cylindrical, pot-shaped downwardly open body, at the top of a horizontal, planar anvil surface is present. At the open bottom of a parallel to the anvil ring cutting edge is provided and formed a free space, which is designed for sufficient reception of the broken soil material. In this case, the outer diameter and the cutting height of the cup chisel corresponds to the outer diameter and the height of the flange bell of the ground dowel to be used.

As a result, a tool is provided with a simple and safe way, by simply driving into the ground, a relatively accurate and clean opening for the anchor flange can be made.

It is advantageous if in the upper zone of the outer periphery of the cup chisel preferably diagonally oriented handles or a gripping trough for handling, in particular for precise touchdown and lifting removal of the cup chisel is present.

In addition, a marking ring z. B. in the form of a circumferential groove, can be provided, which can be relatively accurately observed when driving the cup chisel from the outside, when the correct penetration depth of the tool (corresponding to the Dübelflanschhöhe) is reached to stop puncturing in a timely manner.

The device may also consist of a combination of the above-described pot pick and a Vorlochrohr.

Here, a centric guide bore is provided in the body of the cup chisel in a conventional manner, which should have a length of at least 1 to 1.5 times in diameter in the usual way and serves for the centered vertical receiving the Vorlochrohres.

The Vorlochrohr consists of a tube with an outer diameter of about 5 mm smaller than that of the dowel tube to be used and has the top side a head into which a ram can be used and has a ring cutting edge on the underside.

The Vorlochrohr can now be used immediately after placement of the cup chisel on the asphalt surface and are hit first until it is present at the pot chisel, and then to be taken along with the pot chisel even further. But it may also be taken first to the depth of the pot to the required depth, after which the Vorlochrohr is inserted and hammered, to a predetermined distance between the lower edge of the head of the Vorlochrohres and the top of the cup chisel, preferably at least 20 - 30 cm to a allow vertical knocking the Vorlochrohres.

It is advantageous if a cup chisel ram is provided. Thus, the pot chisel can be made of a tough and abrasion-resistant material and the ram from a shock-resistant material. This has a cylindrical guide foot which is insertable into the central guide bore of the cup chisel and whose head rests on the underside on the upper annular anvil surface of the cup chisel. A central blind hole receiving bore for the tool of the compressor hammer can be provided for easier insertion of the striking tool and - for easier handling - on the outer surface of the head a recessed grip.

In a further embodiment, the device may comprise a cup chisel in the second embodiment, a guide part and a Vorlochrohr.

This cup chisel is similar to the above-described the first embodiment formed, so also has a cylindrical, cup-shaped downwardly open body, on the open bottom of a ring cutting exists and a free space is formed. Different from the first embodiment is in particular that in the body centric no guide bore for the Vorlochrohr, but a blind hole receiving bore for the tool of a compressor hammer is present. The missing here in the pot chisel guide hole is now available separately in a second device part, in the guide part. This has a cylindrical body having in height and diameter substantially the outer shape of the dowel bell and / or excavated for this bottom opening and also the upper side is equipped with two handles, for easier handling, namely for insertion, lifting the guide member and for vertical deflection or spreading the Vorlochrohres.

In the body of this cup chisel, at least one vent hole may be provided between the material or inner cavity and the outer surface, preferably the upper end surface. These serve to ensure that when striking the cup chisel into the ground, the air located in the downsizing interior of the cup chisel can easily escape, which can be done easily on the cup chisel first execution on the central guide bore, which is missing here.

The object is also achieved by a method for introducing an at least partially preformed hole for insertion of a tubular ground anchor with cup-shaped, upper flange and lower driving tip in a ground with asphalt surface using the device described above.

Accordingly, the downwardly open pot with its lower cutting edge on the ground or the asphalt surface is placed according to concentric to the insertion point. Its upper anvil surface is aligned parallel to the annular cutting edge and the asphalt surface.

Thereafter, the cup chisel is driven vertically into the ground until his ring cutting edge has reached the penetration depth greater than the height of the dowel bell edge, which can be read at the distance of the existing on the outer surface of the cup chisel marking ring to the asphalt surface.

Then the cup chisel is removed by lifting out, after which the dissolved material is removed from the worn cylindrical opening. It is thus inventively by hammering the cup chisel a relatively accurate cylindrical Produced opening in which thereafter the bell-shaped flange of einzertzenden ground dowel is seated relatively accurately, which could not be reached or only very cumbersome. The depth of impact corresponds to the height of the bell flange, which was previously uncontrollable.

Finally, a coarse opening is preferably produced centrally in the cylinder opening, in which the ground anchor is driven in by means of a compressor hammer in a known manner.

In a further procedure, a Vorlochrohr is used in addition to the pot chisel. After placing the cup chisel on the asphalt surface, in the central guide opening of the cup chisel, the tube of Vorlochrohres introduced, this Vorlochrohr is constantly monitored vertically taken, then until the lower flange surface of the Vorlochrohr head rests on the Anboßfläche. Thereafter, the Vorlochrohr and thus the pot chisel is further driven until the cup point of the cup chisel has reached the required penetration depth about 3 cm greater than the height of the bell rim; which can be read off via the marking ring.

Finally, the pre-hole tube and the cup chisel are removed and the dissolved material removed from the incised cylindrical opening, after which the ground dowel can be driven. In order to more easily remove the pre-perforated pipe from its fully struck position, it has in its head a transversely guided through-hole through which a rod can be inserted so that it protrudes on both sides of the head and forms diagonally projecting handles. At these handles, the Vorlochrohr is now to pack and remove by turning and pulling upwards. Then the pot can also be packed and removed at its handles.

This approach has the advantage that the lapping of the first Vorlochrohres and only then the Topfmeißels, the Vorlochrohr can be repeatedly checked and aligned during driving in its verticality. This is much more difficult with already hammered pot chisel, since in this wrapping the Vorlochrohr must be rotated by a fixed guide, which requires a lot of craftsmanship and great practice.

Another approach is that, first at the Eintriebstelle the ground anchor z. B. with chalk on the asphalt a circle with a diameter equal to that of the dowel bell is recorded. Thereafter, the asphaltene coating in the interior of the circle, preferably with a tool such as pointed chisel or a small spade chisel, coarsely pitched and the resulting loose material removed. This is a max. 3 - 5 cm deeper cylindrical coarse opening than the height of the dowel bell generated. In many cases, especially with thin asphalt, the coarse pre-perforation can be omitted.

Then a downwardly open pot chisel is placed with its lower cutting edge on the chalk circle, wherein the upper anvil surface is aligned parallel to the cutting edge and the asphalt. Then the pot chisel is hammered or driven vertically until the ring cutting edge has reached the necessary depth of impact.

Next, the pre-hole tube is inserted into the vertical central guide opening of the cup chisel and taken vertically, until at least in the proposed insertion depth of the dowel tip. In this case, the length of the Vorlochrohres is designed so that upon reaching the intended Einschlagtiefe, between the upper end face of the cup chisel and lower head surface of the Vorlochrohres, a sufficient distance for knocking the tube with the raised cup chisel is present, from z. B. at least 20 to 30 cm.

The fact that the pot has a top surface, which is aligned exactly perpendicular to its outer surface and parallel to the annular cutting edge, and also has a central vertical guide opening plays the pot here the very important role of a vertical guide for the Vorlochrohr. This achieves a simple way that the Vorlochrohr can always be driven exactly vertical. After sufficiently deep knocking the Vorlochrohres this is again to remove or expel what happens according to the invention in a simple and thus very advantageous manner characterized in that the pot chisel z. B. about it provided handles or gripping troughs and upload vertically from the asphalt hole, where it slides along the shaft tube of Vorlochrohres.

Thereafter, it is struck vertically upward against the lower flange surface of the Vorlochrohrkopfes, whereby the Vorlochrohr relatively easily knocked out vertically and can be taken. With the Vorlochrohr is known to the soil material, which penetrates the pre-piercing or driving into this compact, with removed and then struck or pushed from this.

The cup chisel thus serves not only as a cutting tool and for centering or vertical guidance of Vorvorp tube, but also as a razor tool for this, which makes the process much easier and economical.

Before completely knocking the Vorlochrohres the Topfmeißel knocked loose material from the coarse opening is removed so that after the complete removal of the Vorlochrohres not fall into the narrower deep Vorloch and this can clog.

This completes the preparations (pre-punching) for the insertion of the ground anchor and the ground anchor is now inserted into the prepared pre-perforation and fully driven in a known manner with the aid of a striking tool and a striking tool (see also Fig. 2 of the DE 197 08 807 C2i) until the bottom of its bell flange reaches a few cm above the asphalt level. Then in the flange interior of the ground dowel soft mortar o.ä. filled, after which the dowel is fully driven, so that the flange top comes to stand about 1 cm lower than the ground level. Thereafter, the dowel-clamping plate with clamping ring, etc. up or inserted and loosely screwed, after which z. B. the post of a traffic sign used in the dowel and firmly tightened by tightening the screws on the clamping plate and the clamping ring.

It is advantageous if preferably after placing the cup chisel on the chalk circle on the asphalt surface in the central guide hole of the cup chisel an anvil or ram is used, which in turn has a central blind hole receiving bore for the compressor tool, the ram-head on the upper annular Anboßfläche of the cup chisel rests. This ensures that the hammering of the cup chisel can be done correctly and with little human effort.

In addition, the underside of the guide bore in the cup chisel inner cavity at least slightly projecting shaft end face of the ram can be sharpened conically and / or provided with at least one cutting edge, whereby underneath coarser material such as pieces of asphalt or stone, are split or smashed when hitting.

In another variant, it is advantageous if a cup chisel without centric guide opening and only with a central blind-hole for the compressor hammer is used. After the hammer has been hammered in deeply enough, it is removed again, that is, lifted out of the asphalt hole. Thereafter, the broken loose material is removed. Finally, in the resulting cylindrical bottom opening as a second Vorichtungsteil a cylindrical guide member is used, which in turn has the central guide opening for the vertically guided recording of Vorlochrohres. After inserting the Vorlochrohres in this guide part, the Vorlochrohr is vertically driven or hammered accordingly. After the input of the Vorlochrohres the guide member is lifted vertically out of the hole and guided along the Vorlochrohr along vertical guided against the head of the Vorlochrohres, whereby the Vorlochrohr knocked out of the ground or driven up. Thereafter, the ground anchor is used as described above.

It is also advantageous, if preferably inserted after inserting the Vorlochrohres in the guide opening of the cup chisel and / or in the guide opening of the guide member in the inner opening of the Vorlochrohres equipped with a central blind hole receiving bore for the compressor tool / he anvil or ram with his shaft with the ram-head resting on the upper annular anvil surface of the pre-tubular tube head. As a result, a very efficient and at the same time exact driving or driving with the aid of a compressed air hammer is possible, at the same time the top of the Vorlochrohres protected and in addition a certain verticality is specified.

• ortsgenaue Arbeit und Ausrichtung;
• es kann eine vertikale Öffnung (Vorlochung) in eine Asphaltfläche eingearbeitet werden;
• eine ortsgenaue Aufnahmeöffnung für einen Bodendübel wird geschaffen;
• die Öffnung weist die Paßmaße des äußeren Kontur des Bodendübels auf;
• ein leichtes Entfernen des Aushubes ist gewährleistet;
• langlebig und nachsetzbar;
• die Tiefe entspricht der Höhe des Dübelflansches;
• keine unästhetischen Verletzungen des Asphalts außerhalb des Dübels durch ungenaues Aufbrechen mit dem Spitz- oder Spatenmeißel;
• erlaubt extrem schnelle und daher kostengünstiges Vorgehen;
• der Topfmeißel kann gleichzeitig als Führung für das Vorlochrohr dienen,
• Nebeneffekte: Der Topfmeißel kann als Ramme zum Heraustreiben des Vorlochrohres dienen.

It can be seen that with the apparatus (and the method) according to the invention very significant advantages are achieved, such as:

• location-specific work and alignment;
• a vertical opening (pre-perforation) can be incorporated into an asphalt surface;
• a location-accurate receiving opening for a ground anchor is created;
• the opening has the mating dimensions of the outer contour of the ground anchor;
• a slight removal of the excavation is guaranteed;
• durable and replaceable;
• the depth corresponds to the height of the dowel flange;
• no unaesthetic injury to the asphalt outside the dowel due to inaccurate rupture with a pointed or spade chisel;
• allows extremely fast and therefore cost-effective procedure;
• the pot chisel can also serve as a guide for the pre-hole pipe,
• Side effects: The pot chisel can serve as a ram to drive out the Vorlochrohres.

The invention will be explained in more detail with reference to several embodiments with reference to the drawings.

Fig. 1:

eine vertikale Schnittansicht nach den ersten Verfahrensschritten, mit eingebrachter Grob-Öffnung und darüber aufgesetztemTopfmeißel,

Fig. 2:

einen Schnitt wie in Fig. 1 nach weiteren Schritten, mit eingeschlagenem Topfmeißel mit eingesetztem Rammdorn,

Fig. 3:

einen Schnitt wie in Fig. 1 und 2, mit eingeführtem und eingeschlagenem Vorlochrohr mit Rammdorn,

Fig. 4:

eine Draufsicht auf die Situation aus Fig. 2,

Fig. 5:

einen vertikalen Schnitt wie in Fig. 3, bei Verwendung des Topfmeißels als Ausschlaghilfe,

Fig. 6:

einen Schnitt wie in den vorhergehenden Figuren, mit fertig eingesetztem Bodendübel und darin eingesetzt befestigtem Verkehrszeichen,

Fig. 7:

einen Schnitt wie in Fig. 2, mit eingeschlagenem Topfmeißel in zweiter Ausführung,

Fig. 8:

eine Schnittansicht wie in Fig. 7, in weiterem Verfahrensschritt, mit eingesetztem Führungsteil,

Fig. 9:

eine Schnittansicht ähnlich wie in Fig. 1, jedoch in weiterer Ausführung mit am Aspaltbelag aufstehenden Topfmeißel und Vorlochrohr,

Fig. 10:

die Vorrichtung aus Fig. 9, in weiterem Schritt, mit bis Auflage auf dem Topfmeißel eingeschlagenem Vorlochrohr, und

Fig. 11:

die Vorrichtung aus Fig. 9 und 10, mit komplett eingeschlagenem Vorlochrohr und Topfmeißel.

Show it:

Fig. 1:

a vertical sectional view after the first process steps, with introduced coarse-opening and placed over it with a bit,

Fig. 2:

a cut like in Fig. 1 after further steps, with hammered chisel with inserted ram,

3:

a cut like in Fig. 1 and 2 , with inserted and taken in Vorlochrohr with piling,

4:

a top view of the situation Fig. 2 .

Fig. 5:

a vertical cut as in Fig. 3 , when using the cup chisel as a rash aid,

Fig. 6:

a section as in the previous figures, with ready inserted dowel and fastened therein fixed traffic sign,

Fig. 7:

a cut like in Fig. 2 , with hammered chisel in second execution,

Fig. 8:

a sectional view as in Fig. 7 , in a further process step, with inserted guide part,

Fig. 9:

a sectional view similar to in Fig. 1 , but in a further embodiment, with the chisel and the pre-hole tube resting on the asphalt coating,

Fig. 10:

the device off Fig. 9 , in a further step, with up to resting on the pot chisel embossed Vorlochrohr, and

Fig. 11:

the device off FIGS. 9 and 10 , with fully inserted Vorlochrohr and Topfmeißel.

Fig. 1 to 5 show a device in execution during its use, it being understood that this is composed of a cup chisel 10, a cup chisel ram 20 (optional), a Vorlochrohr 30 and a Vorlochrohr-ram 38 (optional).

It shows Fig. 1 the situation after the first procedural steps.

It can be seen here a floor 1, which consists of a rocky surface 2 and an asphalt surface 3. In the asphalt surface 3 a reaching into the ground 2 funnel-shaped coarse opening 4 is introduced in the loose material 6 is located. But this can also already been removed. This coarse opening may have been coarse-conically knocked out by simple hammering with the hammer compressor with pointed or spade chisel.

Above the coarse opening 4 is the cup chisel 10, as a cutting tool in the first embodiment, with its lower cutting edge or ring cutting edge 11 on a previously recorded on the asphalt chalk circle 7 (only hinted at here). The chalk circle corresponds to the diameter of the pot or bell flange of the ground anchor to be used and may even have been recorded with its aid. In this case, the edge 8 of the coarse opening 4 is at least slightly within the chalk circle 7 and thus the annular cutting edge 11, so that the pot chisel rests securely on the asphalt surface or gets up.

The cup chisel 10 has a cylindrical body 12 which has on its upper end face a planar anvil surface 13 which is aligned parallel to the lower annular cutting edge 11. In this case, the body with its annular cutting edge is formed on the underside so that a cutting or cutting height 14 (indicated by a broken line) and a total exceeding this hollow interior 15 is present.

In the body 12 is centrally and thus vertically to the anvil surface 12 and the asphalt pavement 3 and parallel to the annular cutting edge 11, a guide bore 16 is introduced. In addition, two diagonally mutually extending protruding handles 17 are attached to the body and on the lateral surface of a marking ring 18th

The ram 20 is located with its guide pin 21 in the guide bore 16, inserted substantially over the entire length in the cup chisel 10. He lies with the lower flange 19 of his head 22 on the anvil surface 13 of the cup chisel just. He has a central blind hole receiving bore 23, for receiving a compressor hammer tool, not shown here. In addition, a gripping recess 24 is provided on the outer circumference of the head for easier handling of the ram.

Fig. 2 illustrates the situation after a further process step. Here, the tool 25 of a compressor hammer 26 is inserted into the blind hole receiving bore 23 of the ram 20. The pot chisel 10 is already completely hammered, so his ring cutting 11 has penetrated the asphalt covering 3 on its entire length or height. This penetration depth 27 corresponds to the flange height of the ground anchor to be hammered in plus approx. 1 - 3 cm. The approximate penetration depth 27 can be monitored from the outside by keeping an eye on the distance between the marking ring 18 and the asphalt surface 3 during hammering.

A subsequent process situation is in Fig. 3 to recognize. Here, the ram 20 has already been removed from the guide bore 16 of the cup chisel 10 and the Vorlochrohr 30 inserted into this and taken accordingly deep into the ground 2. The Vorlochrohr consists of a correspondingly long pipe 31, whose outer diameter is designed to be 5 - 10 mm smaller than that of the Bodendübelschaftes. It has at the lower end a ring cutting edge 33 and at the top of a head 34, the underside of a flat flange surface 34 and above a planar Anboßfläche 35, both of which are aligned perpendicular to the tube axis.

In the inner tube opening 37 is a Vorlochrohr-ramming pin 38 is placed, which is similar to the Topfmeißel-ramming pin 20. He also has a guide pin 21 and a head 22, with its lower head flange 19 on the Anboßfläche 36th the tube head 24 rests. In addition, he has ebenfaslls a central blind hole opening 23, in which the tool 25 of a Compressor hammer 26 is introduced. The Vorlochrohr 30 is thereby fully hammered into the ground, wherein between the flange surface 35 and anvil surface 13, a vertical distance 29 remains free and is in its tube 31 underground material, which was pressed in the advance of the tube in the underground into the pipe interior.

Fig. 4 shows a plan view according to arrow IV Fig.1 , It can be seen how the head 22 of the ram 20 rests concentrically on the anvil surface 13 of the cup chisel 10, wherein the blind hole receiving bore 23 can be seen in the center and laterally projecting the two handles 17th

In Fig. 5 a subsequent situation is shown, namely with already removed Vorlochrohr ramming pin 38 and lifted out of the cylindrically cut and already in between entert from loose material opening 40 cup chisel 10th

With the directional arrows 41 next to the handles 17 it is indicated how the cup chisel 10 is packed on these handles 17 and struck upwards, its anvil surface 13 striking against the flange surface 35 of the head 34 of the pre-hole tube 30 and driving the pre-hole tube vertically upwards. In the process, the material which has penetrated into the tube 31 during the driving in is transported up while a correspondingly deep hole 42 is uncovered.

In Fig. 6 is shown as after further introduction steps already a ground dowel 45, z. B. Ferradix ® Gebr. Sträb GmbH + Co. KG, in the previously prepared opening 42 was used. In this case, the shaft 46 of the ground anchor is firmly wrapped in the opening 42, while the pot- or bell-shaped dowel flange 47 is seated in the opening 40, wherein in the cavity under the flange 47 mortar 48 is filled.

The post 49 of a traffic sign is already used in the dowel shaft 46 and is held by a tightened by screws 43 on the flange 47 disc 44 and a not shown clamping ring clamped in the ground dowel 45.

FIGS. 7 and 8 illustrate a second embodiment and procedure. It shows Fig. 7 Although a situation similar to Fig. 2 , ie with driven cup chisel 50, but this differs from the first embodiment in particular in that no guide opening is provided in the body 12, but only a central blind hole receiving bore 23 for the tool 25 of a compressor hammer 26. On the outer shell is an annular gripping trough 24th provided, similar to the cup chisel ram 20; however, handles may also be provided. In addition, ventilation openings 53 are provided which open on the one hand to the interior 15 and on the other hand to the upper anvil surface 13 and serve to escape the air in the thereby shrinking open interior 15 located.

Fig. 8 represents a further situation of the second variant, namely a guide member 51, which has the outer contour of the Bodenendübelflansches essentially to be used, except that its lower bottom surface like a trough downwards cambered, so the corner region is withdrawn to still through in the lower corners of the cylindrical opening material not to be tilted.

In the body of the guide member, a guide opening 16 is provided which corresponds to that in the cup chisel 10 and also has the same role, namely the vertically guided guided recording of Vorlochrohres 30th

At the top of the guide member 51 as well as the cup chisel 10 two handles 17 are provided diagonally projecting outwards and also serve, after successful knocking the Vorlochrohres, the lifting out of the bottom opening 40 and the vertical upward deflection of the Vorlochrohres.

Fig. 9 - 11 show a third embodiment and operation with a device consisting only of a cup chisel 10 and a Vorlochrohr 30th

It shows Fig. 9 the Topfmeißel 10, placed on his ring cutting edge 11 on the asphalt surface 3. In the Topfmeißel 10 is already inserted the Vorlochrohr 30, which also looks with its annular cutting edge 33 on the asphalt surface 3.

Fig. 10 illustrates the process situation in which the Vorlochrohr 30 has already been hammered until it with its flange 35 on the Anboßfläche 13 of the cup chisel 10 is pending. In this case, the tube 31 of the Vorlochrohres is beaten through the asphalt surface in the underground 2.

Finally, in Fig. 11 represented a further pre-hole situation, in which now the pot chisel 10 is taken, so that a situation similar to in Fig. 2 is reached, except that here the Vorlochrohr is fully driven to rest on the cup chisel. In the head 34 of the Vorlochrohres 30 has a diagonal through hole 32 is provided, into which a rod 55 is inserted, which projects on both sides and handles 56 which serve to unscrew the Vorlochrohres from the ground.

LIST OF REFERENCE NUMBERS 1. ground 29th distance Second underground 30th Vorlochrohr Third Blacktop 31st pipe 4th Rough Opening 32nd Through Hole 5th --- 33rd serrated 6th loose material 34th head 7th Chalk Circle 35th flange 8th. edge 36th Anboßfläche Vorlochrohr 9th --- 37th inner opening 10th Pot chisel, 1st version 38th Rammdorn 11th serrated 39th Substrate Material 12th body 40th opening 13th Anboßfläche Topfmeißel 41st directional arrows 14th cutting height 42nd Hole, opening 15th inner space 43rd screw 16th guide bore 44th disc 17th handles 45th ground anchor 18th marking ring 46th Shank, tube 19th flange 47th Dowel flange 20th Rammdorn 48th mortar 21st spigot 49th post 22nd head 50th Pot chisel, 2nd version 23rd location hole 51st guide part 24th cross recess 52nd floor area 25th Tool 53rd vent hole 26th compressor hammer 54th --- 27th penetration depth 55th pole 28th top 56th handles

Claims (15)

Device for introducing an at least partially preformed hole for inserting a tubular ground dowel (45) with pot-shaped, upper flange (47) and lower driving tip in a stony or hard ground such. B. a ground with asphalt surface (3),
characterized,
in that the device consists of a cup chisel (10, 50) which has a cylindrical body (12) open at the top in the shape of a cup, on the upper side of which there is a horizontal, planar anvil surface (13),
while a ring cutting edge (11) parallel to the anvil surface is provided on the open underside thereof, and a free interior space (15) is formed, which is designed for sufficient accommodation of the broken-out bottom material,
wherein outer diameter and cutting height (14) of the cup chisel corresponds to the outer diameter and the height of the dowel bell. Device according to claim 1, characterized in that
that in the upper zone of the outer periphery of the cup chisel (10, 50) preferably diagonally oriented handles (17) or a gripping recess for lifting the cup chisel and / or vertical deflection of the Vorlochrohres is or is
and that on the outer circumference of a marking ring (18) z. B. is provided in the form of a circumferential groove. Device according to claim 1, characterized in that
that in the body of the cup chisel (10) a central guide bore (16) is provided for centered vertical receiving the guide pin of a ram (20) and / or for guided recording of the tube (31) of a Vorlochrohres (30). Device according to claim 1, characterized in that
in that a pre-perforated tube (30) is provided, consisting of a tube (31) whose outside diameter is smaller than the inside diameter of the bottom dowel tube (48) and at the same time is designed for sliding reception in the guide bore (16) of the cup-cutting head (10) and at the top end a pipe head (34) and at the lower end a ring cutting edge (33) is present. Device according to claim 4, characterized in that
that in the head (34) of the Vorlochrohres (30) has a diagonal Durchgngsbohrung is provided for passing through a road (55) which protrudes on both sides as handles (56). Device according to claim 1, characterized in that
that the length of the tube (31) of the Vorlochrohres (30) is designed so that in the finished eingeschlagnem state of the Topfmeißels (10) and in this centrally guided Vorlochrohres the lower flange surface (35) of the head (34) of the Vorlochrohres
either rests on the upper anvil surface (13) of the cup chisel after the cup chisel (10) has been driven over it,
or at a distance of min. 20 cm above the anvil surface (13) is to allow a vertical deflection over the cup chisel (10). Device according to claim 1, characterized in that
in that a cup chisel ram (20) and a pilot hole ram (38) are provided whose cylindrical guide pin (21) can be inserted into the guide bore (16) of the cup chisel (10) or into the internal opening (37) of the pre-hole tube (30) is, whose head (22) on the underside on the respective upper annular Anboßfläche (13 or 36) rests and centrally has a receiving bore (23) for the tool (25) of the compressor hammer. Device according to claim 1, characterized in that
that in the body (12) of the cup chisel (50) is provided centrally an axial receiving bore (23) for the tool of a compressor hammer (26). Device according to Claims 1 and 6, characterized
in that a guide member (51) is provided, equipped with a cylindrical body (51) substantially in height and diameter the outer shape of the dowel bell and / or the bottom opening (40) excavated therefrom by means of the cup chisel (50), Centric a continuous axial guide opening (16) for the Vorlochrohr (30) is provided and the upper side two handles (17) are present. Method for introducing an at least partially preformed hole for inserting a tubular ground dowel (45) with cup-shaped, upper flange (47) and lower driving tip in a stony or hard ground such. As a ground with asphalt covering (3), using a device according to claim 1,
with the following steps: - placing the downwardly open cup chisel (10, 50) with its lower annular cutting edge (11) on the ground or the asphalt surface, wherein the upper anvil surface (13) is aligned parallel to the annular cutting edge and the asphalt surface; - Vertical driving of the cup chisel (10, 50) until the ring cutting edge (11) has reached the penetration depth (27) greater than the height of the bell rim, readable at the distance of the marking ring (18) on the outer surface of the cup chisel. Removing the cup chisel (10, 50) and removing the dissolved material from the opening (40), - For a hard ground: introducing a coarse opening (4) and / or a centric, preferably stepped tapered or cylindrical hole (42) with a smaller diameter than that of the dowel tube (46) to be used. Method according to claim 10, characterized in that after placing the cup chisel (10) on the asphalt surface, - In the vertical central guide opening (16) of the cup chisel (10), the tube (31) of the Vorlochrohres (30) is introduced, so that this with its lower annular cutting edge (33) also rests on the asphalt, after which the Vorlochrohr is taken vertically, until the lower flange surface (35) of the pipe head (34) on the Anboßfläche (13) of the cup chisel (10) rests, possibly with multiple checking and aligning the verticality of the tube; - Thereafter, the Vorlochrohr and thus the Topfmeißel (10) further driven until the annular cutting edge (11) of the Topfmeißels the penetration depth (27) has reached greater than the height of the bell rim, readable at the distance of the marking ring (18) on the outer surface of the cup chisel; - Finally, the Vorlochrohr (30) and the Topfmeißel (10) are removed and the dissolved material from the cut opening (40) is removed. Method according to claims 10 or 11,
with the following steps: - Recording the Eintreibstelle the ground dowel bell z. B. with chalk on the asphalt surface (3) in the form of a circle (4) with a diameter equal to that of the dowel bell; In the case of thick and hard asphalt, the asphalt surface (3) is hit in the interior of the recorded circle, preferably with a tool (25) such as pointed chisel or narrow spade chisel, in the form of a coarse opening (4) and removal of the loose material (6 ); - placing the downwardly open cup chisel (10 or 50) with its lower annular cutting edge (11) on the chalk circle, wherein the upper anvil surface (13) is aligned parallel to the annular cutting edge and the asphalt surface; - Vertical driving of the cup chisel (10) until the annular cutting edge (11) has reached the penetration depth (27) greater than the height of the bell rim; - Introducing in the vertical central guide opening (16) of the Topfmeißels (10) or the guide member (51) of the Vorlochrohres (30) and its vertical impact to about 3 - 5 cm deeper than the intended insertion depth of the dowel tip; - removing or vertically expelling the Vorlochrohres (30) and removing the Topfmeißels (10) or the guide member (51) and removing the dissolved material before and after the expulsion; - vertically inserting or driving in the ground anchor (45) until the underside of its flange (47) reaches a few cm above the asphalt level and filling the flange interior of the ground anchor largely with soft mortar (48) or the like, - After which the ground dowel (45) is fully driven, so that the flange top is the same height or lower than the asphalt pavement or top edge. Method according to claim 12, characterized
that when removing the Vorlochrohres (30) with the out of the opening (40) vertically on this sliding out or lifted up Topfmeißel (10) or guide member (51) vertically up against the head flange (35) of the Vorlochrohres (30) beaten and thereby the Vorlochrohr is expelled. Method according to claim 12, characterized in that
that preferably after placing the cup chisel (10) on the asphalt covering (3) in the central guide opening (16) of the cup chisel a ram (20) with a central receiving bore (23) for the compressor tool (25) is used, wherein the ram-head (22) rests on the upper annular anvil surface (13) of the cup chisel and wherein preferably the lower end face of the head (22) is provided with a conical tip (28) and / or with at least one cutting edge. Method according to claim 12, characterized in that
that is used for driving in the hole for the bell flange of the dowel of the cup chisel (50) without centric guide opening, after correspondingly deep strike the cup chisel (50) this removed again and the loose material is excavated, after which in the resulting cylindrical bottom opening (40 ), the cylindrical guide member (51) with a central guide opening (16) is inserted, in which then vertically guided the Vorlochrohr (30) is inserted and taken, after which the guide member is raised after reaching the intended Einschlagiefe the Vorlochrohres and with this the Vorlochrohr is driven out vertically ,

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