RU2716181C1 - Combined sheet pile wall and locking connection - Google Patents

Abstract

FIELD: hydraulic engineering; construction.

SUBSTANCE: invention relates to combined sheet pile walls and can be used in hydraulic engineering during construction of sea and river berths, as well as in civil and industrial construction. Combined sheet pile wall comprises bearing tubular piles and locking elements alternating therewith, connected to piles by grips and ledges of tongue-and-groove joints, wherein each gripper is made with a lock cavity and a mouth, and each projection is made with a crest placed in the lock cavity of the adjacent pile grip. Each pile is equipped with two grippers, each of which is made in the form of a holder welded by side surface to tubular pile so that mouths of holders of all tubular piles of sheet pile wall are directed transversely to neutral axis of sheet pile wall and face towards soil filling. Each closing element is made in the form of arch, to both longitudinal edges of which are welded protrusions, flanges of which are arranged in cavities of shells of adjacent tubular piles with formation of lock connections, which axes are located across neutral axis of sheet pile wall.

EFFECT: technical result consists in improvement of strength and reliability of sheet pile wall and its elements without increasing metal consumption by creation of such wall structure, in which lock joints would work for compression and did not experience forces acting on opening of locks, or such forces would be minimum.

5 cl, 5 dwg

Description

The invention relates to combined retaining sheet pile walls and can be used in hydraulic engineering in the construction of sea and river berths, as well as in civil and industrial construction.

In hydraulic engineering, sheet pile walls made of steel tubular piles connected to each other by means of sheet pile joints welded to their outer surfaces are now widely used. Known, for example, sheet pile wall according to the patent for utility model No. 106264, containing a set of steel tubular piles, each of which is welded a pair of tongue-and-groove locks (grips), and a set of alternating locking elements in the form of tubular piles, each of which is welded a pair tongue-and-groove protrusions located in the inner cavities of the grips of adjacent piles. Each tongue-and-groove protrusion is made with a crest of circular or oval cross-section, and each gripper is made in the form of a cage with a pharynx and with a cavity repeating the shape of the crest of the tongue-and-groove protrusion and covering it with the possibility of partial rotation. In each castle pair, the clip covering the ridge has a pharynx oriented, i.e. directed along the neutral axis of the wall, and protrusions with ridges are also oriented along the axis of the sheet pile wall. In this case, the load from the impact of the soil is directed across the neutral axis of the sheet pile wall and acts in the direction of opening the locks.

The specified known sheet pile wall has a very high bearing capacity, but there is a problem of reducing its metal consumption.

Known combined sheet pile wall containing bearing piles made of pipes with longitudinal locking elements welded to them, namely, grips and protrusions with ridges, and locking elements located between them, made of a pair of interconnected Z-shaped sheet piles (Eurasian patent No. 014860, Fig. 10). In this known wall, each carrier tubular pile contains a grip with a locking cavity and a mouth and a protrusion with a ridge, which are located on the neutral axis of the tongue wall and are also oriented along the neutral axis of the tongue wall. Interconnected two Z-shaped sheet piles of locking elements have elements of locking joints at the free ends, i.e. a grip and a protrusion with a ridge, which can be connected respectively to the protrusions and grips of adjacent supporting tubular piles and are also located on the neutral axis of the tongue wall.

This well-known sheet pile wall is less metal-intensive due to the use of thin-walled locking elements, however, as practice shows, the locks of Z-shaped sheet piles are often destroyed, as loads from the weight of the soil are aimed at opening the locks, which leads to a violation of the tightness and loss of strength of the sheet pile wall.

A locking joint for a tongue-and-groove wall is known, including a gripper having a cross-section in the shape of the letter C and formed by two elements in the form of hooks that define the locking cavity, and the free ends of the hooks facing each other limit the pharynx, i.e. the mouth of the capture. A ridge (head) of the locking protrusion is located in the locking cavity of the grip, due to which the connection of two sheet pile wall elements is ensured, i.e. a locking joint is formed, the axis of which is located on the neutral axis of the sheet pile wall (Eurasian patent No. 014860, Fig. 6). The crest of the castle protrusion has a round or oval cross section.

In this known castle joint, the gripping mouth and protrusion with the ridge are located and oriented along the neutral axis of the tongue wall, while the load from the ground acting on the tongue wall is directed transversely to the neutral axis of the wall, as a result of which the locking joint may open. The disadvantage of this known castle connection is the lack of strength.

The objective of the present invention is to eliminate the disadvantages of the prior art and to increase the strength, reliability and durability of the tongue and groove wall and its elements without increasing the metal consumption by creating such a wall structure in which the lock joints would work in compression and not experience the forces acting on the opening of the locks or such efforts would be minimal.

The problem is solved due to the fact that in the combined sheet pile wall, including supporting tubular piles and alternating locking elements connected to piles by means of grips and tongues of tongue-and-groove locking joints, each gripping is made with a locking cavity and mouth, and each protrusion is made with according to the invention, each pile is equipped with two grippers, each of the grippers is made in the form of a holder welded to the side surface к to the tubular pile in such a way that the mouths of the holders of all tubular sheet pile piles are directed transversely to the neutral axis of the sheet pile wall and face the backfill, and each locking element is made in the form of an arch with protrusions welded to both longitudinal edges, and the ridges of these protrusions placed in the cavities of the holders of adjacent tubular piles with the formation of castle joints, the axes of which are transverse to the neutral axis of the sheet pile wall.

The grippers of the proposed sheet pile wall can be located on the neutral axis of the sheet pile wall or offset relative to the neutral axis of the sheet pile wall, with the radius of the arch of each locking element equal to half the distance between the mouths of the clips of adjacent tubular piles.

Each locking protrusion may consist of a strip part welded with one edge to the longitudinal edge of the arch of the locking element, and a ridge welded to the other longitudinal edge of the said strip part.

The closing elements can be made of half pipes, the diameter of which is equal to the distance between the mouths of the clips of adjacent tubular piles.

According to another aspect of the invention, the problem is also solved due to the fact that in the castle connection for connecting two adjacent elements of the tongue wall containing a grip welded to the tubular pile of the tongue wall, having a locking cavity and a mouth, and a protrusion welded to the adjacent element of the tongue wall from the strip part and the ridge placed in the locking cavity of the capture with the formation of the castle connection, the axis of which coincides with the axis of the mouth, according to the invention, the capture is made in the form of casing, welded to the tubular pile with a lateral surface so that its mouth is transverse to the neutral axis of the tongue wall, and the protrusion is welded with a strip part to the longitudinal edge of the arch of the locking element of the tongue wall, while on the inner surface of the locking cavity of the casing a flat contact section is arranged transversely axis of the mouth, for interaction with the end face of the ridge of the protrusion.

In the tongue wall according to the invention, all the tubular piles are equipped with grips, the mouths of which are oriented transversely to the neutral axis of the tongue wall, which leads, respectively, to the transverse arrangement of the locking joints. Such a transverse arrangement of locking joints is the main advantage of the proposed design of the combined sheet pile wall in comparison with the known from the prior art.

The load due to the weight of the soil acting on the convex surface of the arch of each locking element is transferred almost perpendicular to the neutral axis of the tongue wall through the ends of the ridges of the protrusions to the contact surfaces of the clips and acts on the central massive part of each clip, compressing it and not opening the clip.

The implementation of the grips in the form of compact massive clips increases their strength and, consequently, the strength of the castle joints. The implementation of flat contact areas on the inner surface of the cage and on the end of the ridge serves to reduce the specific contact pressure.

The execution of the locking elements in the form of longitudinal arches provides the possibility of transverse orientation of the protrusions of the sheet pile wall due to their location on the longitudinal edges of the arches and, accordingly, the possibility of transverse transmission of force from the weight of the soil to the clips.

The advantage of the arch filling of the annular space of the proposed combined sheet pile wall in comparison with the closing element of the zeta sheet pile in the prototype is as follows. In case of inevitable deviations of bearing tongue-and-groove piles in a planned location or from a vertical, the arch, as a thin-walled element, due to its flexibility without special stresses, compensates for these deviations and transfers additional forces arising from deformation to the locking joints, which due to their transverse arrangement to the neutral axis the tongue and groove walls work in compression and are able to perceive the forces repeatedly, many times larger than the locks of the trough or zeta profiles. This allows you to reduce the metal consumption of the castle compounds by more than half.

The invention is further explained using the drawings, which depict:

in FIG. 1 - combined sheet pile wall according to the invention, consisting of supporting tubular sheet piles and arched locking elements, cross section;

in FIG. 2 is the same, node I in FIG. 1;

in FIG. 3 - capture of the castle connection in the form of a holder, cross section;

in FIG. 4 - protrusion of the castle connection, cross section;

in FIG. 5 is an example of a protrusion with a ridge from a rod of circular cross section.

O-O in the drawings indicates the neutral axis of the sheet pile wall (direction of attachment);

X-X is the axis of the mouth of the grip, coinciding with the axis of the locking connection of the tongue and groove wall according to the invention.

The tongue and groove wall according to the invention includes load-bearing tongue-and-groove piles 1, each pile consists of a pipe 2 and two locking jaws made in the form of clips 3. The clips 3 have an open box-shaped cross-section or approximately the shape of a horizontally located letter C (see FIG. 3 ), which borders the castle cavity 4 with the mouth 5. The cross section of the casing 3 is made symmetrically about the axis X-X of the mouth 5.

Each of the cages 3 is welded to the pipe 2 of the pile 1 of one of its two lateral outer surfaces in such a position that its mouth 5 is located transverse to the neutral axis O-O of the tongue wall, i.e. the x-axis of the mouth is perpendicular to the O-O axis within the tolerances accepted in hydraulic engineering.

On the inner surface of the castle cavity 4, a flat contact section A is made, facing the mouth 5 and designed to interact with the end surface B of the ridge 8 of the castle ledge 7.

Between adjacent piles 1 there are closing elements in the form of longitudinal arches 6, the length of which is equal to the length of the pipes 2, the convex parts of the arches 6 facing the soil backfill of the structure. On both longitudinal edges of each of the arches 6 there are made lock protrusions 7 with ridges 8 located in the castle cavities 4 of the cage 3 of adjacent piles 1 and thus forming tongue-and-groove castle joints.

In cross section, the axis of each castle joint coincides with the axis X-X of the mouth 5, which runs transversely to the neutral axis O-O, and, therefore, the axis of the castle joints are also almost perpendicular to the neutral axis O-O of the sheet pile wall.

The castle connection according to the invention consists of a capture in the form of a clip 3 of the protrusion 7.

Each locking protrusion 7 consists of a ridge 8 and a strip part 9. A ridge 8 is rigidly fixed at one end of the strip part 9, for example, by welding (Fig. 5) or made integrally with it (Fig. 2 and Fig. 4) . In FIG. 5 shows an example of a ridge 8 made of a round bar. A more preferred embodiment of the locking protrusion 7 is the embodiment shown in FIG. 2 and 4. The ridge 8 shown in these figures is made integrally with the strip portion 9 at one of its edges. The other edge of the strip portion 9 of the locking protrusion 7 is welded to the longitudinal edge of the arch 6 of the locking element. The end face B of the ridge 8 is made flat for a more even distribution of the load, but may also have a slightly convex surface (shown).

The load due to the weight of the soil acting on the convex surface of the arch 6 of the locking element, in each castle connection is transmitted perpendicular to the neutral axis of the tongue wall through the end face B of the ridge 8 of the protrusion 7 to the contact surface A of the cage 3 and acts on the central massive part of the cage, compressing it and not opening capture of the castle connection.

The transverse arrangement of the locking joints has a significant advantage compared to the known locking joints of the prior art, because it provides a pattern of distribution and perception of forces from the action of the soil, in which the tongue-and-groove locks work in compression and practically do not experience lateral loads aimed at opening them.

The proposed combined tongue and groove wall has a higher strength lock joints with lower metal consumption, as well as high reliability and durability. In addition, it is convenient in construction, as well as in transporting its elements to the construction site.

Claims (9)

1. Combined sheet pile wall, including supporting tubular piles and alternating locking elements connected to piles by means of grips and tongues of tongue-and-groove locking joints, each gripper being made with a locking cavity and a mouth, and each protrusion made with a ridge placed in the locking cavity of the gripping adjacent piles, characterized in that each pile is equipped with two grippers, each of which is made in the form of a cage, welded on its side to the tubular pile in such a way that the mouths of the cages of all tubular sheet pile piles are directed transversely to the neutral axis of the sheet piling and face the backfill, and each locking element is made in the form of an arch, on both longitudinal edges of which protrusions are welded, the ridges of which are placed in the cavities of the holders of adjacent tubular piles with the formation of locking joints, the axes of which are transverse to the neutral axis of the tongue wall. 2. The sheet pile wall according to claim 1, characterized in that the clips are located on the neutral axis of the sheet pile wall or offset relative to the neutral axis of the sheet pile wall, while the radius of the arch of each locking element is equal to half the distance between the mouths of the clips of adjacent tubular piles. 3. Sheet pile wall according to any one of paragraphs. 1, 2, characterized in that each locking protrusion consists of a strip part welded with one edge to the longitudinal edge of the arch of the locking element, and a ridge welded to the other edge of the said strip part. 4. Sheet pile wall according to paragraphs. 1-3, characterized in that the locking elements are made of half pipes, the diameter of which is equal to the distance between the mouths of the clips of adjacent tubular piles. 5. The locking connection for connecting two adjacent elements of the sheet pile wall according to paragraphs. 1-4, containing a grip welded to the tongue and groove wall of the tongue and groove, and a protrusion welded to the adjacent tongue and groove wall member, consisting of a strip portion and a ridge located in the gripping grip cavity to form a locking joint, the axis of which coincides with the axis mouth characterized in that the grip is made in the form of a holder welded to the tubular pile with a side surface so that its mouth is transverse to the neutral axis of the tongue wall, and the protrusion is welded with a strip part to the longitudinal edge of the arch of the locking element of the tongue wall, in this case, on the inner surface of the castle cavity of the casing, a contact flat section is made, which is transverse to the axis of the mouth, for interaction with the end face of the protrusion ridge.

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