SE537613C2 - Piston system and method of forming a piston system - Google Patents

Abstract

SUMMARY This document refers to a culvert system for relocating community infrastructure below ground level. The culvert system comprises a duct module (10, 10a, 10b, 10c), which defines an elongate space for laying a plurality of conduits (31, 32, 33, 34, 35, 36) so that they extend in the longitudinal direction of the duct module and a coupling chamber ( 20, 20 ', 20 "), which defines a connection space for splicing and / or connection to / from said lines. A relationship between a density of the connection chamber (20, 20', 20") and a density has the channel module (10, 10a, 10b, 10c) is greater than 1, preferably greater than 10 or greater than 100.

Description

TECHNICAL FIELD This document relates to a culvert system for relocation of community infrastructure, such as ducts or pipes for fresh water, wastewater, 5 stormwater, district heating, district cooling, ventilation, electricity and electricity, electrical communication, electrical communication, electrical communication. waste collection (eg garbage collection).

The document also relates to a method for manufacturing such a culvert system as well as prefabricated parts in the form of duct modules and coupling chambers for manufacturing such a culvert system.

Background Conventionally, cables for community infrastructure are laid underground, usually under roads and streets. Each type of conduit forms in its own net, and conduits of different types may be laterally divided, for example over the width of the carriage and / or vertically divided, for example at different depths.

When installing or repairing pipes, as a rule, the carriageway needs to be dug up to allow coloring of new pipes and access of existing pipes, respectively.

One problem is that such excavation, with subsequent backfilling and restoration of surface layers, takes a long time, is costly and hinders traffic on the road. Large costs are incurred by individuals, public transport and traders when traffic disruptions occur for a long time.

Another problem is that under many shafts space begins to become cramped, which means that installations become more complex and that the risk of unintentionally damaging adjacent pipes increases.

There is thus a need for an improved way of laying channels and / or pipes underground. 1 Summary One of the goals is to achieve an improved way of laying channels and / or pipes underground. Special purposes include providing a relocation kit that is simple and cost effective to install, and providing a relocation kit that allows service, maintenance and completion of already installed wiring.

The invention is defined by the appended independent claims. Embodiments appear from the dependent claims, from the following description and from the drawings.

According to a first aspect, a culvert system was established for relocating community infrastructure below ground level. The culvert system comprises a duct module, which defines an elongate space for laying a plurality of wires, so that these stack in the longitudinal direction of the duct module, a coupling chamber, which defines a coupling space for splicing and / or connection to / from said wires. A downward pressure produced by the coupling chamber is greater than a downward pressure produced by the duct module, preferably at least 2 times greater, at least 5 times greater, at least 10 times greater, at least 20 times greater or at least 30 times greater.

By "pressure down" is meant a ratio between the weight of the coupling chamber and the channel module, respectively, on the one hand and the area over which the respective weight is distributed. The pressure produced by the coupling chamber can be produced by the dead weight of the coupling chamber, by the equipment present in the coupling chamber, by any lugs or other projections on which ground pressure acts and by the filling mass which is above the coupling chamber. In the same way, the weight achieved by the channel module can be achieved by the dead weight of the channel module, by equipment present in the channel module and by any additional weights applied to prevent the channel module from being lifted by, for example, high groundwater.

By "community infrastructure" is meant root, conduits and channels for, for example, fresh water, wastewater, stormwater, district heating, district cooling, ventilation, electricity, electrical communication, fiber optic communication, gas and / or waste collection (eg vacuuming). By utilizing switching chambers with a higher density than the duct modules, both duct modules and switching chambers can be produced in a cost-effective manner and the switching chambers are used as "sanke", ie. they counteract that the channel modules float up to follow, for example, Mgt 5 groundwater.

A ratio between a density having the coupling chamber and a density having the channel module may be greater than 1, preferably greater than 10, greater than 20, greater than 50 or greater than 100.

By "density" is meant the ratio between the total volume of each module, including the volume of cradles and the enclosed volume, and its total mass.

A cradle thickness has the coupling chamber may be at least twice as rigid as a cradle thickness has the duct module, preferably at least 3 times as rigid, at least 5 times as rigid or at least 10 times as rigid.

The duct module and the coupling chamber can be formed of different materials.

The duct module can be formed mainly of a plastic material or of a metallic material.

By "substantially" is meant at least 90% by weight, preferably at least 95% by weight or at least 99% by weight.

By forming the channel module of a plastic material, this can be manufactured at a relatively low cost and made completely tight. This avoids problems with water penetrating into the duct module.

Furthermore, compared to concrete spruces, the number of joints is reduced, since a duct module made of plastic or metal can be made much longer than one made of concrete. The duct module may have cradles that are corrugated and / or at least partially double-rocked.

For example, the cradles may have axes running in the circumferential direction. The coupling chamber may be formed mainly of stone and / or concrete.

By forming the coupling chamber of concrete, this can be manufactured at a much lower cost than the yore of plastic or metal. DaltII, the coupling chamber can relatively easily be made sufficiently strong to only, for example, loads from traffic directly above the coupling chamber. The duct module may have a cross-sectional area which is sufficiently large to allow an operator to travel along the entire length of the duct module for installation, inspection or repair of said conduits. Preferably, the cross-sectional area is so large that an operator can stand upright in the duct module. The duct module may comprise holders for vertically and / or horizontally separated coloring of said lines.

The duct module may have, seen in a plane perpendicular to its longitudinal direction, at least one curved rocker portion.

The duct module can have a circular or elliptical cross section.

In the case of a duck portion present in the longitudinal direction thereof, the duct module may have a radially extending, substantially circumferential flange. By "substantially circumferential" is meant at least 50% of the circumference, preferably at least 75% of the circumference, 90% of the circumference, 99% of the circumference or 100% of the circumference. The flange may be between 5 and 100 cm from the spirit of the duct module, preferably between 5 and 50 cm or between 10 and 30 cm.

The cradle of the duct module can be substantially continuous, seen in a circumferential direction. The cradle can be completely continuous.

The coupling chamber may have a cradle portion having an opening which is adapted in shape and size to receive said duck portion.

A cradle of the coupling chamber may have a lower portion and an upper portion, which are collapsible in the vertical direction.

Substantially half of the opening may be formed in the lower portion and substantially the remainder of the opening is formed in the upper portion. By "substantially half" is meant 50% +/- 10% units, preferably 50% +/- 5 ° / 0 units, of the opening area. The opening may have an opening surface extending between outer and inner surfaces of the cradle portion, and the opening surface may have a recess for receiving the flange. 4 The recess can have a width which is greater than the width of the flange, seen in the thickness direction of the cradle.

A filling mass can be arranged in the recess. The filling mass may be selected from a group consisting of plastic resin, rubber or rubber-like materials and cement.

The filling mass can be an expanding material.

According to a second aspect, a prefabricated duct module is provided for use in the culvert system according to any one of the preceding claims, comprising an elongate duct housing, at least two conduits arranged in the duct housing, which extend in the longitudinal direction of the duct module.

By prefabricating the duct module, this can be manufactured at a relatively low cost and under choice controlled forms.

A prefabricated duct module as above may have a length of at least 3 m, preferably at least 5 m, at least 10 m, at least 20 m or at least 30 m.

The prefabricated duct module may have an internal cross-sectional area of about 1.5-7 m2, preferably about 2.5-5 m2 or 3-5 m2.

The prefabricated duct module may contain bars and any fasteners to support the wires. For example, all initially planned pipes, wires, cable ducts and / or cable ladders can be pre-assembled in connection with the prefabrication. However, this does not preclude additional tubes, wires, cable ducts or cable ladders from being inserted into the duct module after it has been installed.

According to a third aspect, a prefabricated coupling chamber is provided for use in the culvert system according to any one of the preceding claims, comprising a bottom portion and at least one cradle portion comprising an opening adapted in shape and size to receive a duct portion of the duct module.

A prefabricated coupling chamber may have an internal volume of about 5-30 m3, preferably about 7-20 m3 or about 8-15 m3.

The coupling chamber may be formed by a lower portion having said bottom portion and cradle portions extending to a height corresponding to a vertical layer for half the height of the opening, and an upper portion having cradle portions extending from said vertical layer and to a height corresponding to a ceiling level of the coupling chamber. The coupling chamber may further comprise a roof portion, which has at least one descent opening.

By prefabricating the coupling chamber, this can be manufactured at a relatively low cost and under choice controlled shapes.

Creating a connection chamber meant that all connections to / from the respective prefabricated duct module can be stored in the connection chamber, and thus outside the duct module. In the connection chamber, the accessibility 10 is normally better, which facilitates work with splicing and connecting / disconnecting wires. If two prefabricated duct modules were to be joined directly to each other, pipes and conduits would need to be recessed about 0.51.5 m from the duct module duct in order for the splicing equipment to fit.

According to a fourth aspect, there is provided a method of forming a culvert system, comprising providing a duct module defining an elongate space for laying a plurality of conduits so as to extend in the longitudinal direction of the duct module, providing a coupling chamber defining a coupling space for splicing and / or connecting to / from said lines, wherein a pressure downwardly produced by the coupling chamber is greater than a downward pressure created by the duct module, preferably at least 5 times greater, at least 10 times greater or at least 20 times greater, to fix a duct portion of the duct module in an opening adapted to the shape and size of the duck portion in a cradle portion of the coupling chamber, and to provide a ground level so that the duct module and the coupling chamber are below the ground level.

Brief Description of the Drawings Fig. 1 is a schematic sectional view of a coupling chamber and two duct modules, seen in a vertical plane along the longitudinal direction of the duct modules.

Fig. 2 is a schematic sectional view of a coupling chamber, seen in a vertical plane transverse to the longitudinal direction of the duct modules.

Fig. 3 is a schematic sectional view of a duct module 10. Fig. 4 is a schematic sectional view of a part of the fastening of a duct module in the cradle of the coupling chamber.

Figs. 5a-5c are schematic plan views of different arrangements of duct modules and connection chambers.

Detailed description Fig. 1 shows a switching chamber 20 located below ground level 1, to which two channel modules 10a, 10b are connected. Only duck portions of the channel modules are displayed.

The coupling chamber 20 may comprise a bottom plate 21, a lower rock portion 22, an upper rock portion 23, a lid 24 and an access opening 25. The saval bottom plate, the lower rock portion 22, the upper rock portion 23 and the lid 24 may be formed of concrete.

The base plate 21 can be prefabricated and transported to the installation site, or formed by casting at the installation site. The lower cradle portion 22 may comprise substantially vertical cradles, which are designed to extend upwardly from the edge portion of the bottom plate 21. In the case of a square base plate 21, for example, the lower cradle portion 22 may comprise four cradles.

By "substantially vertical" is meant that cradles that are vertical have +/- 2, preferably +/- 12.

The cradles of the lower cradle portion 21 may have an MO h1 (Fig. 2) which is adapted so that the upper part of the lower cradle portion coincides with the vertical center of the channel module 10, 10a, 10b.

The lower cradle portion 22 can be prefabricated and transported to the installation site, or formed by casting at the installation site. The bottom plate 21 may be integrated with the lower rock portion 22. For example, the bottom plate 21 and the lower rock portion 22 may be formed in one piece.

A lug 211 may be formed at the base plate 21 to allow this existing filling mass to provide additional pressure on the base plate. The lower cradle portion 22 has an opening 221 for receiving a duck portion of the channel module 10, 10a, 10b. The opening 221 has a shape which connects to the shape of the channel module 10, 10a, 10b.

In the example shown, where the channel module 10, 10a, 10b has a circular cross-section, the opening 221 is semicircular and has a raised water concave surface 222.

The upper cradle portion 23 may comprise substantially vertical cradles, which are designed to connect to the cradles of the lower cradle portion 22 to form cradles of the coupling chamber.

The size and shape of the upper rock portion, seen from above, can thus coincide with the size and shape of the lower rock portion.

Also of the upper cradle portion, the cradles may be integrated with each other and preferably formed in one piece. The upper cradle portion 23 can be prefabricated and transported to the installation site, or formed by molding at the installation site.

The cradles of the upper rock portion 23 may have a height h2 which corresponds to the difference between the total height of the coupling chamber 20 and the height h1 of the lower rock portion.

The upper cradle portion 23 may have an opening for receiving a duck portion of the channel module 10, 10a, 10b. The opening 232 has a shape which connects to the shape of the channel module 10, 10a, 10b.

In the example shown, where the channel module 10, 10a, 10b has a circular cross-section, the opening 231 is semicircular and has a lowered water concave surface 232.

A cover 24 can be designed to provide a roof to the coupling chamber.

The lid 24 can be prefabricated and transported to the installation site, or formed by casting at the installation site.

The lid 24 can be integrated with the upper cradle portion 23, for example 30 by being formed in one piece.

The lid may have an access opening which allows an operator to enter the coupling chamber 20. The opening may have any shape, for example 8 circles with a diameter of about 50-100 cm. The opening may be provided with a descent well 25, which may be formed of concrete, metal or plastic, and its height may be selected to suit the distance between the upper portion of the lid 24 and the ground level 1, so that the descent well 25 may be provided with a lid 5 at the level of the ground level 1.

In most practical embodiments, the coupling chamber 20 may have a base surface whose sides are between 2 m and 5 m, preferably about 3x4 m or 3x4 m. The total height of the coupling chamber may be between 2 m and 4 m, preferably about 2.5-3, 5 m. The weight of the coupling chamber can be in the order of 15-40 tons, preferably 20-30 tons. Thus, the coupling chamber as such, depending on the size and cradle thickness, can provide a pressure of the order of 10-40 kN / m2, preferably 2030 kN / m2.

Between abutment surfaces of the base plate 21 and the lower cradle portion 22, between abutment surfaces of the lower cradle portion 22 and the upper cradle portion 23 and between abutment surfaces of the upper cradle portion and the lid 24, a sealing and / or fixing mass may be applied.

It will be appreciated that one or more lugs or other projections, similar to that on the bottom plate 21, may be formed on the lower rock portion 22, the upper rock portion 23 and / or on the lid 24.

The duct module 10, 10a, 10b can be designed as a tube with any cross-section, for example circular, as shown in the drawings.

The channel module 10, 10a, 10b may have a diameter between 2 and 3 m, preferably about 2.3-2.5 m. The channel module 10, 10a, 10b may have cradles 25 which are corrugated, seen in the longitudinal direction.

The weight of the duct module can be in the order of 150-300 kg / running meter, preferably 150-200 kg / 10 running meters. Thus, the duct module as such can achieve a downward weight of the order of 1.5-3 kN per running meter, which, depending on the diameter of the duct, can correspond to a pressure of about 0.5-1.5 kN / m2.

Thus, the coupling chamber as such produces a pressure of the order of 5-80 times as large as the duct module, preferably 9 at least 10 times at the start, at least 20 times at the start or at least 30 times at the start.

Alternatively, or as a complement, the channel module can be double-wave. According to one embodiment, the duct module can be formed by winding a hollow tube as a spiral around a core with the desired cross-section, wherein in the longitudinal direction of the duct module adjacent tube portions are welded or glued together. The duct module can thus have outer cradles 11 and inner cradles 12. At its duct portions, the duct module can be provided with a substantially circumferential flange 13. The flange can be continuous or have a plurality of portions separated along the circumferential direction.

The duct module can be provided with mounting brackets 14, 15a, 15b, 15c for mounting community infrastructure. In the example shown in Fig. 3, the channel module is provided with a vertical bar 14, to which a pair of horizontal portions 15a, 15b are connected. Furthermore, the duct module has a 15c bar 15c hanging from the ceiling.

The bars 14, 15a, 15b, 15c can be mounted against the inner cradle 12 of the duct module by means of plates 16, which are fixed to the inner cradle 12 by welding or gluing, the bars being mounted by means of screw or bolt joints engaging with the plates 16.

As a non-limiting example, the ceiling hanging carrier 15c may support tubes 31 for electricity and tubes 32 for fiber cable. The vertical carrier 14 can carry a fresh water line 33, a district heating supply line 34, a district heating return line 35 and a waste water line 36.

The duct module 10 can be milled with one or more carriers 14, 15a, 15b, 15c and one or more pipes 31, 32, 33, 34, 35, 36 or ducts already during manufacture in the factory, so that a prefabricated unit is provided comprising the duct wall 11 itself. , 12, at least one bar 14, 15a, 15b, 15c and at least one rudder 31, 32, 33, 34, 35, 36 and optionally, also the flange.

Fig. 4 shows how a duck portion has the channel module 10 can be fixed at the opening in the cradle 27 has the lower cradle portion 22.

The cradle 27 has an inner surface 27a and an outer surface 27b. In the opening, an opening surface 222 extends between these, which is raised concave. In the opening surface, a recess 28 extending radially from the opening surface 222 is formed.

The recess may be in the form of a recess which may be continuous along the entire opening surface 222.

The recess 28 may have an extent, seen in the longitudinal direction of the channel module 10, which is greater than the extent of the flange 13 in the longitudinal direction of the channel module, preferably at least 50% larger, at least 100% larger, 150% larger or 200% larger. Furthermore, the recess may have a depth which is greater than the radial extent of the flange outwards from the surface of the channel module 10, preferably at least 20% larger, at least 50% larger or at least 100% larger.

In the recess 28 a space S is formed between the delimiting surfaces of the recess 28 and the surfaces of the flange 13. In this space a fixing and tightening mass 42 can be applied. Preferably, the mass 42 may be expanding, in order to fill as much of the space S as possible. The mass 42 may be an expander concrete.

Furthermore, a fixing and / or reinforcing mass 41 can be applied between the outer surface of the channel module 10 and the opening surface 222. The mass 41 can be expander concrete.

Fig. 5a shows how a connection chamber 20 can be used for interconnection of a pair of mutually aligned channel modules 10a, 10b.

Fig. 5b shows how a coupling chamber 20 'can be used for interconnection of a pair of channel modules 10a, 10b, angled towards each other, where the longitudinal directions of the channel modules have an angle V relative to each other.

Fig. 5c shows how a coupling chamber 20 "can be used to interconnect three channel modules 10a, 10b, 10c, for example color branching to several areas.

In the coupling chamber 20, pipes and conduits can be arranged to connect the pipes and conduits present in the respective channel module. In the connection chamber, connections to and / or from the pipes and the lines can also be provided, for example for connection to properties that are to be served by the community infrastructure.

Furthermore, the coupling chamber can accommodate equipment such as repeaters or gateways for communication or pumping devices for pumping, for example, water, waste water or storm water.

For example, the duct module 10 can be placed completely horizontally, whereby the root mounted in the duct module is arranged with a drop. Between two adjacent duct modules, pumping can take place as described above.

It will be appreciated that two adjacent channel modules may also have an angle 10 relative to each other in height. For this purpose, the cradle portions 22, 23 may have food or outwardly sloping rocks.

The description will now focus on a way to provide a culvert system.

Introduction & relocation of the culvert system achieved a shaft foundation in a conventional manner. This can be done by digging and applying substrate material.

Base plate 21 and lower cradle portion 22 can be prefabricated in one piece, transported to the installation site and placed and weighed at the intended location on the shaft base.

If a longer culvert is to be provided, bottom plates and lower cradle portions 22 for a plurality of coupling chambers 20 can be placed in designated places.

Duct modules 10, which may have pre-installed pipes and wires as described above, are transported to the installation site.

On the opening surface 222 the lower cradle portion 22 is applied, the mass 41. Then the duct module 10 is lifted into place, the flange 13 being fitted into the recess 28.

Pulp 41 is applied to the outer surface of the duct module, to one or both sides of the flange 13 and possibly also to the raised abutment surfaces of the lower rock sections 22.

The upper cradle portion 23 can be prefabricated in one piece and transported to the installation site. The upper cradle portion 23 is then lifted into place, the flange 13 being fitted into a corresponding recess in the lowered opening surface 232.

Through a slide 29 which extends from the upper surface of the upper rock part down to the recess in the lowered opening surface 232, the mass 42 is injected so that it fills the space S between the limiting surfaces of the flange 13 and the recess 28.

The lid 24 can be prefabricated in one piece and transported to the installation site.

Additional sealing compound can be applied to the upturned surfaces of the upper cradle portion 23, after which the lid 24 is applied.

According to a particularly preferred embodiment, the channel module is formed by a double-walled plastic pipe with a total cradle thickness of 3-10 cm, preferably 5-10 cm, and the concrete coupling chamber with a cradle thickness of 20-40 cm, preferably 25-35 cm. 13

Claims (24)

PATENT REQUIREMENTS A culvert system for laying community infrastructure below ground level, comprising: a duct module (10, 10a, 10b, 10c), which defines an elongate space for laying a plurality of conduits (31, 32, 33, 34, 35, 36) so that these extend in the longitudinal direction of the duct module, a coupling core (20, 20 ', 20 "), which defines a coupling space for splicing and / or connection to / from said 10 wires, characterized in that a pressure provided by the coupling chamber is not greater than a pressure downwardly produced by the duct module, preferably at least 2 times greater, at least 5 times greater, at least 10 times greater, at least 20 times greater 15 or at least 30 times greater. A culvert system according to claim 1, wherein a ratio between a density of the coupling chamber (20, 20 ', 20 ") and a density of the channel module (10, 10a, 10b, 10c) is greater than 1, preferably a disk of 10 or greater and 100. A culvert system according to claim 1 or 2, wherein a cradle thickness of the coupling chamber (20, 20 ', 20 ") is at least twice as large as a cradle thickness has the channel module (10, 10a, 10b, 10c), preferably at least 3 times as large. , at least 5 times said star or at least 10 times said star. A culvert system according to any one of the preceding claims, wherein the channel module (10, 10a, 10b, 10c) is formed mainly of a plastic material or of a metallic material. 14 A culvert system according to any one of the preceding claims, wherein the channel module (10, 10a, 10b, 10c) has cradles (11, 12) which are corrugated and / or at least partially double-rocked. A culvert system according to any one of the preceding claims, wherein the coupling chamber (20, 20 ', 20 ") is substantially formed of stone and / or concrete. A culvert system according to any one of the preceding claims, wherein the duct module (10, 10a, 10b, 10c) has an internal cross-sectional area of 1.5-7 m2, preferably 2.5-5 m2 or 3-5 m2. A culvert system according to any one of the preceding claims, wherein the duct module (10, 10a, 10b, 10c) comprises holders (14, 15a, 15b, 15c) which are vertically and / or horizontally separated from said conduits (31, 32, 33, 34, 35, 36). A culvert system according to any one of the preceding claims, wherein the channel module (10, 10a, 10b, 10c) has, seen in a plane perpendicular to its longitudinal direction, at least one curved rock portion. A culvert system according to claim 9, wherein the channel module (10, 10a, 10b, 10c) has a substantially circular or elliptical cross-section. A culvert system according to any one of the preceding claims, wherein the channel module (10, 10a, 10b, 10c) has a radially extending, substantially circumferential flange (13) at a duct portion thereof located in the longitudinal direction thereof. A culvert system according to claim 11, wherein the coupling chamber (20, 20 ', 20 ") has a cradle portion (27) having an opening adapted in shape and size to receive said duck portion. A culvert system according to any one of the preceding claims, wherein a cradle has the coupling chamber (20, 20 ', 20 ") having a lower portion (22) and an upper portion (23), which are collapsible in the vertical direction. The culvert system of claim 13, wherein substantially half of the opening (221) is formed in the lower portion (22) and substantially the remaining portion (232) of the opening is formed in the upper portion (23). A culvert system according to claim 12 in combination with any of claims 13 or 14, wherein the opening (221, 231) has an opening surface (222, 232) extending between outer (27b) and inner (27a) surfaces of the wall portion (27). wherein the opening surface (222, 232) has a recess (28) for receiving the flange (13). A culvert system according to claim 15, wherein the recess has a width which is greater than the width of the flange (13), seen in the thickness direction of the cradle (27). A culvert system according to claim 15 or 16, wherein a filling mass (42) is arranged in the recess (28). A culvert system according to claim 17, wherein the filling mass (42) is selected from a group consisting of plastic resin, rubber or rubber-like material and cement. A culvert system according to claim 17 or 18, wherein the filling mass (42) 8r is an expanding material. A prefabricated duct module (10, 10a, 10b, 10c) for use in the culvert system according to any one of the preceding claims, comprising: an elongated duct housing (11, 12), 16 at least two ducts arranged in the duct housing (31, 32, 33, 34 , 35, 36), which stack in the longitudinal direction of the channel module (10, 10a, 10b, 10c). A prefabricated coupling chamber (20, 20 ', 20 ") for use in the culvert system according to any one of claims 1-19, comprising: a bottom portion (21), and at least one cradle portion (22, 23) comprising an opening shaped and size adapted to receive a duck portion of the channel module (10, 10a, 10b, 10c). Coupling chamber (20, 20 ', 20 ") according to claim 21, wherein the coupling chamber (20, 20', 20") is formed by a lower portion (21, 22), which has said bottom portion (21) and cradle portions (22 ), which extend to a height corresponding to a vertical layer for the half height of the opening (h1), and an upper portion (23), which has cradle portions (23) extending from said vertical layer (h1) and to a height (h1). + h2) corresponding to a ceiling level has the coupling chamber (20, 20 ', 20 "). The coupling chamber (20, 20 ', 20 ") according to claim 22, further comprising a roof portion (24) having at least one descent opening (25). A method of forming a culvert system, comprising providing a channel module (10, 10a, 10b, 10c) which defines a longitudinal space for laying a plurality of conduits (31, 32, 33, 34, 35, 36), so that these stack in the longitudinal direction of the duct module (10, 10a, 10b, 10c), to provide a connection chamber (20, 20 ', 20 "), which defines a connection space for splicing and / or connection to / from the adjacent wires. (31, 32, 33, 34, 35, 36), wherein one pressure downstream of the coupling chamber (20, 20 ', 20 ") is greater than one of the channel module (10, 10a, 10b, 10c) downstream pressure. Preferably at least 2 times larger, at least 5 times larger, at least 10 times larger or at least 20 times larger, to fix a duct portion of the duct module (10, 10a, 10b, 10c) in an opening adapted to the shape and size of the duck portion (221, 231). in a cradle portion (27) 5 has the coupling chamber (20, 20 ', 20 "), and to provide a ground level (1) such that the channel module (10, 10 a, 10b, 10c) and the coupling chamber (20, 20 ', 20 ") are located below ground level (1). 18 10b 10a 1/3 24 23 22 Fig 24 231 232 29 26 h2 hi 211 222 221 22 21 211 3116 32 13 11 12 222 '‘41 42 27a