Utility tunnel

Abstract

The invention belongs to the technical field of municipal engineering, and particularly relates to a comprehensive pipe gallery. The utility tunnel comprises a plurality of prefabricated units formed by splicing end to end. Each prefabricated unit comprises a bottom plate, a top plate and at least two vertical plates used for connecting the bottom plate and the top plate. The bottom plate, the top plate and the two vertical plates at the ends are spliced to form a rectangular structure with two open ends and a cavity inside; the two ends of the vertical plate are respectively connected with the bottom plate and the top plate through a plurality of connecting pieces; each connecting piece comprises a channel distributed in the height direction of the corresponding vertical plate, two internal thread cylinders arranged on the bottom plate and the top plate correspondingly, and two external thread columns with one ends in threaded connection with the interiors of the internal thread cylinders and the other ends inserted into the channels. The comprehensive pipe gallery is formed by connecting the prefabricated units end to end, the structural strength of the single prefabricated unit is not inferior to that of a box formed through integral pouring, the advantages of being convenient to transport and easy to assemble are achieved, and the construction efficiency can be improved easily.

Description

Technical Field

[0001] The invention belongs to the technical field of municipal engineering, and in particular relates to a comprehensive pipe gallery. Background Art

[0002] An urban integrated pipe gallery is an underground tunnel space that integrates power, communication, heat, water supply and other engineering pipes and lines to ensure the operation of the city. During construction, the foundation pit is usually excavated first, and then the formwork is built and concrete is poured to form the tunnel.

[0003] The existing urban integrated pipe corridors are generally constructed by casting the pipes into multiple identical, short-length pipe modules in the factory through the construction of templates, and then transporting the pipe modules to the construction site and hanging them down in the foundation pit for assembly. This method is mainly time-consuming because of the construction and disassembly of the templates, and during transportation, the pipe modules are hollow and prone to cracking and wear.

[0004] The document with the authorization announcement number CN114575385B discloses a municipal integrated pipe corridor and its construction method. The municipal integrated pipe corridor includes a plurality of prefabricated units which are spliced ​​end to end to form a corridor. The prefabricated units include prefabricated parts which are assembled to form a cavity. The prefabricated parts are provided with at least one mounting hole on one side close to the splicing seam. A connecting rod is fixed to each prefabricated part corresponding to the mounting hole. After two adjacent prefabricated parts are spliced, the connecting rods in the two prefabricated parts are arranged side by side. The municipal integrated pipe corridor also includes: a locking piece which is used to fix the connecting rods into one through the mounting hole. A grouting assembly is pre-buried in the prefabricated parts. The grouting assembly includes a grouting pipe. The grouting pipe is provided with a grouting hole at the mounting hole. The construction method includes excavating a foundation pit, laying prefabricated units, fixing, and grouting.

[0005] However, this solution still has the following problems: the tunnel is composed of a base plate, two side plates and a cover plate, and the connection between the side plates and the base plate and the cover plate is completed only by the locking pieces at the connection. Even if grouting is performed, the connection surface is still too small and the strength is not as good as the integrally cast concrete pipe module.

[0006] To this end, the inventors have proposed a comprehensive pipe gallery and a construction method thereof to solve the above-mentioned technical problems. Summary of the invention

[0007] In view of the above-mentioned problems, the purpose of the present invention is to provide a comprehensive pipe gallery, which is formed by connecting prefabricated units end to end, and the structural strength of a single prefabricated unit is not inferior to that of an integrally cast box. It has the advantages of convenient transportation and simple assembly, which is conducive to improving construction efficiency.

[0008] The specific technical solutions of the present invention are as follows: A comprehensive pipe gallery comprises a plurality of prefabricated units which are spliced ​​end to end, wherein the prefabricated units comprise a bottom plate, a top plate and at least two vertical plates for connecting the bottom plate and the top plate; the bottom plate, the top plate and the two vertical plates at the ends are spliced ​​to form a rectangular structure with open ends and a cavity inside; the two ends of the vertical plates are respectively connected to the bottom plate and the top plate by a plurality of connecting members; a single connecting member comprises a channel distributed along the height direction of the vertical plate, two internally threaded barrels respectively arranged on the bottom plate and the top plate, and two externally threaded columns with one end screwed into the internally threaded barrel and the other end inserted into the channel.

[0009] As a further preferred embodiment of the present invention, the vertical plate is also provided with a groove close to the middle of the surface of the cavity and connected to the channel, and a reinforcement member connected to the external threaded column is provided in the groove; the reinforcement member includes a fixing plate having an opening for allowing the external threaded column to pass through.

[0010] As a further preferred embodiment of the present invention, the fixing plate includes a U-shaped plate disposed in the channel and clamped with the external threaded column, and two side plates disposed at both ends of the U-shaped plate and extending into the slot.

[0011] As a further preferred embodiment of the present invention, the fixing plate also includes an externally threaded rod arranged on the surface of the inner wall of the U-shaped plate away from the channel; the reinforcement also includes a cover plate arranged to close the groove, a fixing hole arranged on the cover plate and used to pass through the externally threaded rod, and a fastening nut screwed on the externally threaded rod and used to fix the cover plate.

[0012] As a further preferred embodiment of the present invention, the connecting members are distributed along the width direction of the vertical plate, the width of the slot is greater than the spacing between two adjacent external threaded columns, and the number of the fixing plates located in the slot is greater than or equal to two.

[0013] As a further preferred embodiment of the present invention, the reinforcement member further comprises a tightening block disposed on the surface of the cover plate close to the slot and inserted between two adjacent side plates. The tightening blocks form a group of two and are respectively located at the upper and lower inner walls of the slot.

[0014] As a further preferred embodiment of the present invention, the reinforcement member further includes a grouting pipe 1 arranged in the cover plate, and a grouting pipe 2 arranged on the support block and connected to the grouting pipe 1.

[0015] As a further preferred embodiment of the present invention, the fixed plate also includes a grouting hole 1 arranged on the side plate.

[0016] As a further preferred embodiment of the present invention, the vertical plate is further provided with at least two grouting holes 2 close to the bottom plate and the top plate and connected to the channel.

[0017] As a further preferred embodiment of the present invention, at least two auxiliary connectors are provided at the connection between the vertical plate and the bottom plate and the top plate; the auxiliary connectors include a first plate body connected to the bottom plate or the top plate, a second plate body connected to the vertical plate, and a connecting plate for connecting the first plate body and the second plate body. The first plate body and the second plate body are both connected by bolts; the second plate body is provided with a grouting hole three matching the grouting hole two; the second plate body is also provided with a grouting pipe three connected to the grouting hole three and inserted into the grouting hole two.

[0018] The beneficial effects of the present invention are: Compared with the direct prefabrication of box-shaped prefabricated parts in the factory, the prefabricated unit provided by the present invention first prefabricates each panel in the factory and then splices them on site. This reduces the scale requirements of the prefabrication factory and the tonnage requirements of the transportation and lifting equipment, which helps to reduce construction costs and is conducive to promotion and application.

[0019] The prefabricated unit structure provided by the present invention has a strength that is not inferior to that of a box body formed by integral casting, has the advantages of convenient transportation and simple assembly, and is conducive to improving construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Attached Figure 1 It is a schematic diagram of the cross-sectional structure of the present invention at the main viewing angle.

[0021] Attached Figure 2 It is a schematic diagram of the local structure of the present invention.

[0022] Attached Figure 3 The appended Figure 2 Enlarged structural diagram at A in the middle.

[0023] Attached Figure 4 It is a partial three-dimensional structural schematic diagram of the present invention.

[0024] Attached Figure 5 It is a schematic diagram of the structure of the fixing plate of the present invention when viewed from a top view.

[0025] Attached Figure 6 It is a structural schematic diagram of the cover plate of the present invention.

[0026] Attached Figure 7 The appended Figure 2 Enlarged structural diagram at B in the middle.

[0027] Description of the drawings: cavity a, opening b, bottom plate 1, top plate 2, vertical plate 3, connecting member 4, reinforcing member 5; Slot 31, grouting hole 2 32, auxiliary connecting piece 33; A first plate body 331, a second plate body 332, a connecting plate 333, a bolt 334, a grouting hole three 335, and a grouting pipe three 336; Channel 41, internal threaded barrel 42, external threaded column 43; Fixed plate 51, cover plate 52, fixing hole 53, fastening nut 54, support block 55, grouting pipe 1 56, grouting pipe 2 57; U-shaped plate 511, side plate 512, external threaded rod 513, grouting hole 1 514. DETAILED DESCRIPTION

[0028] In the description of the present invention, it should be understood that the terms "upper", "lower", "inside", "outside", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the product of the invention is usually placed when in use, or are directions or positional relationships commonly understood by those skilled in the art. These directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0029] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms such as "setting" and "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection: it can be a mechanical connection or an electrical connection: it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] First of all, it should be pointed out that the integrated pipe gallery (common trench) described in the present invention is constructed in conjunction with the open excavation prefabrication assembly method. The cross-section of the integrated pipe gallery is a multi-grid box shape. The grids are independent of each other and do not communicate with each other. Water supply pipes and power communication pipelines are laid in each grid, which are completed through advance planning. The integrated pipe gallery is formed by splicing multiple prefabricated units. The length of each prefabricated unit is 10~25m. Expansion joints are set between the prefabricated units, and shear keys are set between the deformation joints to reduce relative settlement and ensure that the settlement difference is not more than 30mm, so as to ensure the water tightness of the deformation joint. The waterproofing of the deformation joint adopts a composite waterproof structural measure, and the buried rubber waterstop is used in combination with the external waterproof layer. A rubber waterstop is set inside the deformation joint, and the low-foaming plastic board and two-component polysulfide sealing paste are used for caulking.

[0031] It is worth noting that since prefabricated units need to be prefabricated in factories, the construction scale of the prefabrication factory needs to be large, and the tonnage of the transportation and lifting equipment is high. Therefore, it is difficult to reduce the project cost and promote its use.

[0032] Based on this, the present invention proposes a comprehensive pipe gallery and a corresponding construction method, and the following are specific embodiments: Reference Figure 1 ~Attached Figure 7 As shown, this embodiment provides an integrated pipe gallery, including a plurality of prefabricated units spliced ​​end to end, the prefabricated units including a bottom plate 1, a top plate 2 and at least two vertical plates 3 for connecting the bottom plate 1 and the top plate 2; the bottom plate 1, the top plate 2 and the two vertical plates 3 at the ends are spliced ​​to form a rectangular structure with open ends and a cavity a inside; the two ends of the vertical plates 3 are respectively connected to the bottom plate 1 and the top plate 2 through a plurality of connecting members 4; a single connecting member 4 includes a channel 41 distributed along the height direction of the vertical plate 3, two internally threaded barrels 42 respectively arranged on the bottom plate 1 and the top plate 2, and two externally threaded columns 43 with one end screwed into the internally threaded barrel 42 and the other end inserted into the channel 41.

[0033] It is worth noting that the bottom plate 1, the top plate 2 and the vertical plate 3 are all factory-prefabricated concrete plates. The bottom plate 1 and the top plate 2 have the same specifications, and the plate body is cast in one piece, and there is no joint on the surface. In addition to being set at both ends of the bottom plate 1 to form a rectangular prefabricated unit, the vertical plate 3 should also be set in the middle of the bottom plate 1. The vertical plate set in the middle plays the role of subdividing the cavity a into multiple independent cavities for laying pipelines with different functions. At the construction site, the bottom plate 1 and the top plate 2 are assembled and connected through the vertical plate 3 to form a prefabricated unit, and then assembled in sequence to connect the prefabricated units end to end, thereby improving the construction efficiency of the pipe gallery. Compared with the prefabricated units directly prefabricated in the factory, the prefabricated plate-type structure has lower requirements for the scale of the prefabrication factory, and the tonnage requirements of the transportation and hoisting equipment are also reduced, which helps to reduce the construction cost and is conducive to promotion and application. The problem that needs to be overcome in the method of splicing on site to form a prefabricated unit is to increase the connection strength between the vertical plate 3 and the bottom plate 1 and the top plate 2, so that it can reach the same strength as the integral casting. There are multiple connectors 4, which are distributed along the width direction of the vertical plate 3; specifically, the channel 41 runs through the vertical plate 3 and has insertion ports at the upper and lower ends of the vertical plate 3; the internal threaded barrel 42 corresponds to the position of the channel 41 one by one, and is pre-buried in the bottom plate 1 and the top plate 2 when pouring. Furthermore, the number of internal threaded barrels 42 can be set excessively to ensure flexible adjustment on site. After the two external threaded columns 43 on the bottom plate 1 and the top plate 2 are fixed by the internal threaded barrel 42, they are respectively inserted from the two insertion ports, and the two external threaded columns 43 preferably abut each other in the middle of the channel 41 to complete the vertical fixation of the vertical plate 3 between the bottom plate 1 and the top plate 2. After the vertical plate 3 is fixed with the bottom plate 1 and the top plate 2, concrete can be poured on the outer surface of the vertical plate 3, the connection between the vertical plate 3 and the bottom plate 1 (top plate 2), and in the channel 41 to ensure the connection strength and waterproof performance.

[0034] As some preferred embodiments of the present invention, the vertical plate 3 is further provided with a groove 31 close to the middle of the surface of the cavity a and connected to the channel 41, and a reinforcement 5 connected to the external threaded column 43 is provided in the groove 31; the reinforcement 5 includes a fixing plate 51 having an opening b for allowing the external threaded column 43 to pass through.

[0035] It is worth noting that the slots 31 are arranged in the middle of the vertical plate 3, and there are multiple slots 31 distributed along the width direction of the vertical plate 3. The width of the slots 31 is greater than the spacing between two adjacent external threaded columns 43, so that one slot 31 can expose at least two adjacent external threaded columns 43. One reinforcing member 5 corresponds to one connecting member 4. Since at least two external threaded columns 43 are exposed in one slot 31, the number of fixing plates 51 located in the slot 31 is greater than or equal to two. When the upper and lower external threaded columns 43 are inserted from the upper and lower ends of the opening b respectively, the fixing plate 51 can achieve the function of strengthening the connection strength between the upper and lower external threaded columns 43. The fixing of the reinforcing member 5 itself is achieved by connecting with the slot 31. For example, the part of the reinforcing member 5 extending to the slot 31 abuts against the side wall of the slot 31, so that the reinforcing member 5 is clamped and fixed by the slot 31.

[0036] As some preferred embodiments of the present invention, the fixing plate 51 includes a U-shaped plate 511 disposed in the channel 41 and clamped with the external threaded column 43, and two side plates 512 disposed at both ends of the U-shaped plate 511 and extending into the slot 31. The shape of the U-shaped plate 511 fits the surface of the external threaded column 43, and the height of the U-shaped plate 511 needs to meet the requirement of extending to the upper and lower external threaded columns 43 to ensure that the U-shaped plate 511 can clamp and fix the two external threaded columns 43. The length of the two side plates 512 needs to ensure that they extend into the slot 31, and the height of the side plates 512 matches the inner height of the slot 31.

[0037] Further preferably, the fixing plate 51 also includes an externally threaded rod 513 arranged on the surface of the inner wall of the U-shaped plate 511 away from the channel 41; the reinforcement 5 also includes a cover plate 52 arranged to close the slot 31, a fixing hole 53 arranged on the cover plate 52 and used to pass the externally threaded rod 513, and a fastening nut 54 screwed on the externally threaded rod 513 and used to fix the cover plate 52.

[0038] It is worth noting that the external threaded rod 513 is arranged in the middle of the U-shaped plate 511, and the upper and lower surfaces of the external threaded rod 513 are preferably horizontal cross-sections, so that the ends of the two external threaded columns 43 can be in contact with the external threaded rod 513 to avoid sliding. The area of ​​the cover plate 52 is larger than the area of ​​the slot 31 to ensure that the slot 31 can be completely covered. Through the structure of the external threaded rod 513 and the fastening nut 54, the cover plate 52 can be fixed on the surface of the vertical plate 3, which not only improves the strength of the fixing plate 51 and thus improves the connection tightness between the upper and lower external threaded columns 43, but also avoids the slot 31 from being directly exposed to the external environment, affecting the service life of the entire vertical plate 3 and the internal structure.

[0039] As some preferred embodiments of the present invention, the reinforcing member 5 further includes a tightening block 55 disposed on the surface of the cover plate 52 close to the slot 31 and inserted between two adjacent side plates 512. The tightening blocks 55 are grouped into two, and are respectively located at the upper and lower inner walls of the slot 31, for strengthening the tightness of the connection between the cover plate 52 and the slot 31.

[0040] As some preferred embodiments of the present invention, the reinforcement member 5 further includes a grouting pipe 1 56 disposed in the cover plate 52, and a grouting pipe 2 57 disposed on the tightening block 55 and connected to the grouting pipe 1 56. The advantage of such a configuration is that by injecting concrete into the grouting pipe 2 57, the grouting pipe 1 56 discharges the concrete into the slot 31 and further flows into the channel 41, while fixing the connector 4 and the reinforcement member 5, thereby improving the structural strength of the vertical plate 3.

[0041] As some preferred embodiments of the present invention, the fixing plate 51 further includes a grouting hole 514 disposed on the side plate 512. The grouting hole 514 allows the concrete in the slot 31 to flow into the fixing plate 51 through the grouting hole 514 to seal the opening b, further improving the fixing strength of the reinforcement member 5 to the two external threaded columns 43.

[0042] As some preferred embodiments of the present invention, the vertical plate 3 is further provided with at least two grouting holes 32 close to the bottom plate 1 and the top plate 2 and connected to the channel 41. Since the channel 41 is long, it is difficult to fill the entire channel 41 by injecting the grouting pipe 57 and the grouting pipe 56, and the grouting holes 32 are used to ensure that the channel 41 is fully filled with concrete.

[0043] As some preferred embodiments of the present invention, at least two auxiliary connectors 33 are provided at the connection between the vertical plate 3 and the bottom plate 1 and the top plate 2; the auxiliary connector 33 includes a first plate body 331 connected to the bottom plate 1 or the top plate 2, a second plate body 332 connected to the vertical plate, and a connecting plate 333 for connecting the first plate body 331 and the second plate body 332. The first plate body 331 and the second plate body 332 are both connected by bolts 334; the second plate body 332 is provided with a grouting hole three 335 matching the grouting hole two 32; the second plate body 332 is also provided with a grouting pipe three 336 connected to the grouting hole three 335 and inserted into the grouting hole two 32. Such a configuration helps to further improve the connection strength between the vertical plate 3 and the bottom plate 1 and the top plate 2, and enhance the structural strength of the entire prefabricated unit.

[0044] The present invention also provides a construction method, which specifically comprises the following steps: Foundation pit excavation: excavate the foundation pit according to the design line of the integrated pipeline corridor, and then compact and level the bottom wall of the foundation pit; Assemble the prefabricated unit: lay the bottom plate 1 on the bottom wall of the foundation pit, then install the external threaded column 43 on the internal threaded cylinder 42 of the bottom plate 1, and then fix the vertical plate 3 on the bottom plate 1 by plugging the channel 41 with the external threaded column 43; connect the fixing plate 51 with the external threaded column 43 on the bottom plate 1 through the slot 31, and then cover the top plate 2, and insert the external threaded column 43 on the top plate 2 through the channel 41, and insert the end into the fixing plate 51; Fixing: Install the cover plate 52, and then inject concrete into the slot 31 through the cooperation of the grouting pipe 1 56 and the grouting pipe 2 57; Install the auxiliary connector 33: Install the auxiliary connector 33 and fill the channel 41 with concrete through the grouting hole 335 and the grouting pipe 336; After waiting for the concrete to harden, the individual prefabricated units are connected, and finally the prefabricated units are spliced ​​until the construction of the integrated pipeline corridor is completed, and finally backfilling is performed.

[0045] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An integrated pipe gallery, comprising a plurality of prefabricated units spliced ​​end to end, the prefabricated units comprising a bottom plate (1), a top plate (2) and at least two vertical plates (3) for connecting the bottom plate (1) and the top plate (2); the bottom plate (1), the top plate (2) and the two vertical plates (3) at the ends are spliced ​​to form a rectangular structure with open ends and a cavity (a) inside; the characteristics are: The two ends of the vertical plate (3) are respectively connected to the bottom plate (1) and the top plate (2) via a plurality of connecting members (4); a single connecting member (4) comprises a channel (41) distributed along the height direction of the vertical plate (3), two internally threaded cylinders (42) respectively arranged on the bottom plate (1) and the top plate (2), and two externally threaded columns (43) with one end screwed into the internally threaded cylinder (42) and the other end inserted into the channel (41).

2. The integrated pipe gallery according to claim 1, characterized in that: The vertical plate (3) is also provided with a groove (31) near the middle of the surface of the cavity (a) and connected to the channel (41); a reinforcing member (5) connected to the external thread column (43) is provided in the groove (31); the reinforcing member (5) comprises a fixing plate (51) having an opening (b) for allowing the external thread column (43) to pass through.

3. The integrated pipe gallery according to claim 2 is characterized in that: The fixing plate (51) comprises a U-shaped plate (511) disposed in the channel (41) and clamped with the external threaded column (43), and two side plates (512) disposed at both ends of the U-shaped plate (511) and extending into the slot (31).

4. The integrated pipe gallery according to claim 3 is characterized in that: The fixing plate (51) further comprises an externally threaded rod (513) arranged on a surface of the inner wall of the U-shaped plate (511) away from the channel (41); the reinforcing member (5) further comprises a cover plate (52) arranged to close the slot (31), a fixing hole (53) arranged on the cover plate (52) and used to pass the externally threaded rod (513), and a fastening nut (54) screwed on the externally threaded rod (513) and used to fix the cover plate (52).

5. The integrated pipe gallery according to claim 4 is characterized in that: The connecting members (4) are distributed along the width direction of the vertical plate (3), the width of the slot (31) is greater than the spacing between two adjacent external threaded columns (43), and the number of the fixing plates (51) located in the slot (31) is greater than or equal to two.

6. The integrated pipe gallery according to claim 5, characterized in that: The reinforcement member (5) further comprises a tightening block (55) which is arranged on a surface of the cover plate (52) close to the slot (31) and inserted between two adjacent side plates (512).

7. The integrated pipe gallery according to claim 6, characterized in that: The reinforcement member (5) further comprises a grouting pipe (56) disposed in the cover plate (52), and a grouting pipe (57) disposed on the support block (55) and connected to the grouting pipe (56).

8. The integrated pipe gallery according to claim 7 is characterized in that: The fixing plate (51) further comprises a grouting hole 1 (514) arranged on the side plate (512).

9. The integrated pipe gallery according to claim 1, characterized in that: The vertical plate (3) is also provided with at least two grouting holes (32) close to the bottom plate (1) and the top plate (2) and connected to the channel (41).

10. The integrated pipe gallery according to claim 9, characterized in that: At least two auxiliary connecting members (33) are provided at the connection between the vertical plate (3) and the bottom plate (1) and the top plate (2); the auxiliary connecting member (33) comprises a first plate body (331) connected to the bottom plate (1) or the top plate (2), a second plate body (332) connected to the vertical plate, and a connecting plate (333) used to connect the first plate body (331) and the second plate body (332).

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