An integrated pipe gallery

Abstract

The present invention belongs to the technical field of municipal engineering, and particularly relates to an integrated pipe gallery. The integrated pipe gallery comprises a plurality of precast units spliced end to end, and each precast unit includes 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 openings at both ends and a cavity inside; both ends of the vertical plate are respectively connected to the bottom plate and the top plate through a plurality of connecting pieces; a single connecting piece includes a channel distributed along the height direction of the vertical plate, two internal threaded cylinders respectively arranged on the bottom plate and the top plate, and two external threaded columns with one end screwed into the internal threaded cylinder and the other end inserted into the channel. The integrated pipe gallery is formed by connecting the precast units end to end, and the structural strength of a single precast unit is not inferior to that of a box body formed by integral casting, which has the advantages of convenient transportation and simple assembly, and is beneficial to improving the construction efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of municipal engineering, and particularly relates to an integrated utility tunnel. Background Art

[0002] An urban integrated utility tunnel refers to a tunnel space built underground, integrating engineering pipelines such as electricity, communication, heat, and water supply, which is an important infrastructure to ensure the operation of the city. During construction, generally, the foundation pit is first excavated, and then the formwork is erected and concrete is poured to form the shape.

[0003] Existing urban integrated utility tunnels generally use the method of casting multiple identical and short pipeline modules through formwork erection in the factory, and then transporting them to the construction site and hoisting the pipeline modules into the foundation pit for assembly. The main time-consuming part of this method lies in the erection and disassembly of the formwork, and during transportation, due to the hollow interior of the pipeline modules, problems such as cracking and abrasion are likely to occur.

[0004] The document with the authorization announcement number CN114575385B discloses a municipal integrated utility tunnel and its construction method. The municipal integrated utility tunnel includes multiple precast units spliced end to end to form a corridor. The precast unit includes precast components that enclose a cavity after assembly. At least one installation hole is provided on one side of the precast component close to the splicing seam, and a connecting rod is fixed at the position corresponding to the installation hole for each precast component: after two adjacent precast components are spliced, the connecting rods in the two precast components are arranged side by side: the municipal integrated utility tunnel further includes: a locking member for passing through the installation hole to fix the connecting rods into one body: a grouting component embedded in the precast component, and the grouting component includes a grouting pipe, and the grouting pipe is provided with a grouting hole at the position of the installation hole; the construction method includes foundation pit excavation, laying of precast units, fixing, and grouting.

[0005] However, the following problems still exist in this solution: The utility tunnel is composed of a bottom plate, two side plates, and a cover plate connected to each other. The connection between the side plates and the bottom plate and the cover plate is only completed by the locking members at the connection points. Even after grouting, the connection surface is still too small, and the strength is inferior to that of a concrete pipeline module formed by integral pouring.

[0006] Therefore, the inventor of the present invention has proposed an integrated utility tunnel and its construction method to solve the above technical problems. Summary of the Invention

[0007] Aiming at the above existing problems, the purpose of the present invention is to provide an integrated utility tunnel formed by end-to-end connection of precast units, and the structural strength of a single precast unit is not inferior to that of a box formed by integral pouring, which has the advantages of convenient transportation and simple assembly, and is beneficial to improving the construction efficiency.

[0008] The specific technical solution of the present invention is as follows:

[0009] An integrated pipe gallery includes a plurality of prefabricated units spliced end to end. The prefabricated unit includes 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; both ends of the vertical plate are connected to the bottom plate and the top plate respectively through a plurality of connectors; a single connector includes a channel distributed along the height direction of the vertical plate, two internal threaded cylinders respectively arranged on the bottom plate and the top plate, and two external threaded columns with one end screwed into the internal threaded cylinder and the other end inserted into the channel.

[0010] As a further preference of the present invention, a slot is further arranged on the vertical plate near the middle of the surface close to the cavity and communicated with the channel, and a reinforcing member connected to the external threaded column is arranged in the slot; the reinforcing member includes a fixing plate with an opening for the external threaded column to pass through.

[0011] As a further preference of the present invention, the fixing plate includes a U-shaped plate arranged in the channel and clamped with the external threaded column, and two side plates arranged at both ends of the U-shaped plate and extending into the slot.

[0012] As a further preference of the present invention, the fixing plate further includes an external threaded rod arranged on the surface of the inner wall of the U-shaped plate away from the channel; the reinforcing member further includes a cover plate arranged for closing the slot, a fixing hole arranged on the cover plate for passing through the external threaded rod, and a fastening nut screwed on the external threaded rod for fixing the cover plate.

[0013] As a further preference of the present invention, the connectors are distributed along the width direction of the vertical plate, the width of the slot is greater than the distance between two adjacent external threaded columns, and the number of the fixing plates located in the slot is greater than or equal to two.

[0014] As a further preference of the present invention, the reinforcing member further includes a tightening block arranged on the surface of the cover plate close to the slot and inserted between two adjacent side plates. Two tightening blocks are in a group and are respectively located at the upper and lower inner walls of the slot.

[0015] As a further preference of the present invention, the reinforcing member further includes a first grouting pipeline arranged in the cover plate, and a second grouting pipeline arranged on the tightening block and communicated with the first grouting pipeline.

[0016] As a further preference of the present invention, the fixing plate further includes a first grouting hole arranged on the side plate.

[0017] As a further preference of the present invention, at least two second grouting holes are further arranged on the vertical plate near the bottom plate and the top plate and communicated with the channel.

[0018] As a further preference of the present invention, at least two auxiliary connecting members are provided at the joints of the vertical plate with the bottom plate and the top plate; the auxiliary connecting member includes 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. Both the first plate body and the second plate body are connected by bolts; a third grouting hole matching the second grouting hole is provided on the second plate body; a third grouting pipe connected to the third grouting hole and inserted into the second grouting hole is further provided on the second plate body.

[0019] The beneficial effects of the present invention are as follows:

[0020] Compared with directly prefabricating box-shaped precast parts in the factory, for the precast unit provided by the present invention, each plate body is first prefabricated in the factory and then assembled on-site during construction. This reduces the requirements for the scale of the precast factory, and at the same time reduces the tonnage requirements for transportation and hoisting equipment, which helps to reduce construction costs and is conducive to popularization and application.

[0021] The precast unit provided by the present invention has a structural strength not inferior to that of a box body formed by integral pouring, and has the advantages of convenient transportation and simple assembly, which is conducive to improving construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Attached Figure 1 is a schematic cross-sectional structure diagram of the present invention from the front view angle.

[0023] Attached Figure 2 is a schematic partial structure diagram of the present invention.

[0024] Attached Figure 3 Attached Figure 2 is an enlarged schematic structure diagram at position A in the attached

[0025] Attached Figure 4 is a schematic partial three-dimensional structure diagram of the present invention.

[0026] Attached Figure 5 is a schematic structure diagram of the fixing plate of the present invention from the top view angle.

[0027] Attached Figure 6 is a schematic structure diagram at the cover plate of the present invention.

[0028] Attached Figure 7 Attached Figure 2 is an enlarged schematic structure diagram at position B in the attached

[0029] BRIEF DESCRIPTION OF THE DRAWINGS: Cavity a, opening b, bottom plate 1, top plate 2, vertical plate 3, connecting member 4, reinforcing member 5;

[0030] Groove 31, second grouting hole 32, auxiliary connecting member 33;

[0031] The first plate body 331, the second plate body 332, the connecting plate 333, the bolt 334, the third grouting hole 335, the third grouting pipeline 336;

[0032] The channel 41, the internal thread cylinder 42, the external thread column 43;

[0033] The fixing plate 51, the cover plate 52, the fixing hole 53, the fastening nut 54, the tightening block 55, the first grouting pipeline 56, the second grouting pipeline 57;

[0034] The U-shaped plate 511, the side plate 512, the external threaded rod 513, the first grouting hole 514. Detailed implementation manners

[0035] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "outer", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the invention product is usually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0036] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, terms such as "arrangement" 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 an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0037] First of all, it should be pointed out that the utility tunnel (common trench) described in the present invention is constructed in cooperation with the open-cut precast assembly method. The cross-section of the utility tunnel is a multi-cell box shape, and the cells are independent of each other and do not communicate with each other. The water supply pipelines and power communication pipelines are respectively arranged in each cell, which is completed through advance planning. The utility tunnel is formed by splicing multiple precast units. The length of each precast unit is 10 - 25 m. Deformation joints are provided between the precast units, and shear keys are provided between the deformation joints to reduce relative settlement and ensure that the settlement difference is not greater than 30 mm, ensuring the water tightness of the deformation joints. The waterproofing of the deformation joints adopts a composite waterproof construction measure, and the embedded rubber waterstop and the external waterproof layer are used in combination. A rubber waterstop is arranged inside the deformation joint, and it is caulked with a low-foaming plastic board and a two-component polysulfide sealant.

[0038] It should be noted that since the precast units need to be precast in the factory, a large construction scale of the precast factory is required, and the tonnage of transportation and hoisting equipment is high. Therefore, it is difficult to reduce the project cost and it is difficult to promote the use.

[0039] Based on this, the present invention proposes an integrated pipe gallery and a construction method adapted thereto. The following are specific embodiments:

[0040] Refer to the attached Figure 1 ~ attached Figure 7 As shown, this embodiment provides an integrated pipe gallery, which includes a plurality of precast units spliced end to end. The precast unit includes 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; both ends of the vertical plate 3 are connected to the bottom plate 1 and the top plate 2 respectively 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 internal thread cylinders 42 respectively arranged on the bottom plate 1 and the top plate 2, and two external thread posts 43 with one end screwed into the internal thread cylinder 42 and the other end inserted into the channel 41.

[0041] It should be noted that the bottom plate 1, the top plate 2 and the vertical plate 3 are all precast concrete plates in the factory. The bottom plate 1 and the top plate 2 have the same specifications and are integrally cast, with no joints on the surface. In addition to being arranged at both ends of the bottom plate 1 to form a rectangular precast unit, the vertical plate 3 should also be arranged in the middle of the bottom plate 1. The vertical plate arranged in the middle serves to subdivide the cavity a into multiple independent cavities for laying pipelines with different functions. At the construction site, it is assembled and connected with the bottom plate 1 and the top plate 2 through the vertical plate 3 to form a precast unit, and then the precast units are assembled in sequence so that the precast units are connected end to end, thereby improving the construction efficiency of the pipe gallery. Compared with directly prefabricating box-shaped precast units in the factory, the prefabricated plate-shaped structure reduces the requirements for the scale of the prefabrication factory and also reduces the tonnage requirements for transportation and hoisting equipment, which helps to reduce the construction cost and is conducive to popularization and application. The problem to be overcome in the way of forming a precast unit by on-site splicing is to improve the connection strength between the vertical plate 3 and the bottom plate 1 and the top plate 2 so that it reaches the same strength as that of integral casting. Among them, the number of the connecting pieces 4 is multiple and is distributed along the width direction of the vertical plate 3; specifically, the channel 41 penetrates through the vertical plate 3 and there are insertion openings at the upper and lower ends of the vertical plate 3; the internal thread cylinders 42 correspond to the positions of the channels 41 one by one and are pre-embedded in the bottom plate 1 and the top plate 2 during pouring. Further, the number of the internal thread cylinders 42 can be set in excess to ensure flexible adjustment on site. After the two external thread columns 43 on the bottom plate 1 and the top plate 2 are fixed through the internal thread cylinders 42, they respectively penetrate into the two insertion openings, and preferably, the two external thread columns 43 abut against 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 to the bottom plate 1 and the top plate 2, concrete can be poured on the outer surface of the vertical plate 3, at the joint 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.

[0042] As some preferred embodiments of the present invention, a slot 31 is further provided on the vertical plate 3 near the middle of the surface close to the cavity a and communicating with the channel 41, and a reinforcing member 5 connected to the external thread column 43 is arranged in the slot 31; the reinforcing member 5 includes a fixing plate 51 having an opening b through which the external thread column 43 passes.

[0043] It should be noted that the slots 31 are provided 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 distance between two adjacent external thread posts 43, ensuring that one slot 31 can expose at least two adjacent external thread posts 43. One reinforcing member 5 corresponds to one connecting member 4. Since at least two external thread posts 43 are exposed at one slot 31, the number of fixing plates 51 located within the slot 31 is greater than or equal to two. When the upper and lower external thread posts 43 are inserted through the upper and lower ends of the opening b respectively, the fixing plate 51 realizes the function of strengthening the connection strength between the upper and lower external thread posts 43. The fixing of the reinforcing member 5 itself is achieved through connection 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, clamping and fixing the reinforcing member 5 by the slot 31.

[0044] As some preferred embodiments of the present invention, the fixing plate 51 includes a U-shaped plate 511 disposed within the channel 41 and engaged with the external thread post 43, and two side plates 512 disposed at both ends of the U-shaped plate 511 and extending into the slot 31. Among them, the shape of the U-shaped plate 511 fits the surface of the external thread post 43, and the height of the U-shaped plate 511 needs to meet the requirement of extending to the upper and lower external thread posts 43 to ensure that the U-shaped plate 511 can clamp and fix the two external thread posts 43. The lengths of the two side plates 512 need 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.

[0045] More preferably, the fixing plate 51 further includes an external thread rod 513 disposed on the surface of the inner wall of the U-shaped plate 511 away from the channel 41; the reinforcing member 5 further includes a cover plate 52 for closing the slot 31, a fixing hole 53 disposed on the cover plate 52 for passing through the external thread rod 513, and a fastening nut 54 screwed on the external thread rod 513 for fixing the cover plate 52.

[0046] It should be noted that the external thread rod 513 is disposed in the middle of the U-shaped plate 511, and the upper and lower surfaces of the external thread rod 513 are preferably horizontal cut surfaces, which can ensure that the ends of the two external thread posts 43 abut against the external thread 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 thread 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 thread posts 43, but also prevents 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.

[0047] As some preferred embodiments of the present invention, the reinforcement 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. Among them, two tightening blocks 55 form a group and are respectively located at the upper and lower inner walls of the slot 31, and are used to strengthen the connection tightness between the cover plate 52 and the slot 31.

[0048] As some preferred embodiments of the present invention, the reinforcement member 5 further includes a first grouting pipeline 56 disposed in the cover plate 52, and a second grouting pipeline 57 disposed on the tightening block 55 and communicating with the first grouting pipeline 56. The advantage of such a setting is that by injecting concrete into the second grouting pipeline 57, the first grouting pipeline 56 discharges the concrete into the slot 31 and further flows into the channel 41, while fixing the connecting member 4 and the reinforcement member 5, and improving the structural strength of the vertical plate 3.

[0049] As some preferred embodiments of the present invention, the fixing plate 51 further includes a first grouting hole 514 disposed on the side plate 512. The first grouting hole 514 can enable the concrete in the slot 31 to flow into the fixing plate 51 through the first grouting hole 514 to block the opening b, and further improve the fixing strength of the reinforcement member 5 on the two external threaded columns 43.

[0050] As some preferred embodiments of the present invention, at least two second grouting holes 32 are further provided on the vertical plate 3 close to the bottom plate 1 and the top plate 2 and communicating with the channel 41. Since the length of the channel 41 is relatively long, it is difficult to fill the entire channel 41 by relying on the injection of the second grouting pipeline 57 and the first grouting pipeline 56, and the second grouting holes 32 are used to ensure the full filling of the channel 41 with concrete.

[0051] As some preferred embodiments of the present invention, 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 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. Among them, the first plate body 331 and the second plate body 332 are both connected by bolts 334; a third grouting hole 335 matching the second grouting hole 32 is provided on the second plate body 332; a third grouting pipeline 336 connected to the third grouting hole 335 and inserted into the second grouting hole 32 is further provided on the second plate body 332. Such a setting helps to further improve the connection strength between the vertical plate 3 and the bottom plate 1 and the top plate 2, and improve the structural strength of the entire prefabricated unit.

[0052] The present invention also provides a construction method, which specifically includes the following steps:

[0053] Foundation pit excavation: Excavate the foundation pit according to the design line of the comprehensive utility tunnel, and then tamp and level the bottom wall of the foundation pit;

[0054] Assemble precast units: 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 inserting the channel 41 into the external threaded column 43; Connect the fixing plate 51 to the external threaded column 43 on the bottom plate 1 through the slot 31, and then cover the top plate 2. The external threaded column 43 on the top plate 2 is inserted through the channel 41, and the end is inserted to the fixing plate 51;

[0055] Fixing: Install the cover plate 52, and then inject concrete into the slot 31 through the cooperation of the first grouting pipe 56 and the second grouting pipe 57;

[0056] Install the auxiliary connecting piece 33: Install the auxiliary connecting piece 33, and fill the channel 41 with concrete through the third grouting hole 335 and the third grouting pipe 336;

[0057] After waiting for the concrete to harden, the connection of a single precast unit is completed. Finally, complete the splicing between precast units until the construction of the comprehensive utility tunnel is completed, and finally backfill.

[0058] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar methods to replace them, but 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 unit 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; characterized in that: Both ends of the vertical plate (3) are respectively connected to the bottom plate (1) and the top plate (2) through a plurality of connecting members (4); each connecting member (4) includes a channel (41) distributed along the height direction of the vertical plate (3), two internal thread cylinders (42) respectively arranged on the bottom plate (1) and the top plate (2), and two external thread columns (43) with one end screwed into the internal thread cylinder (42) and the other end inserted into the channel (41); On the vertical plate (3), there is also a slot (31) near the middle of the surface close to the cavity (a) and communicating with the channel (41), and a reinforcing member (5) connected to the external thread column (43) is arranged in the slot (31); the reinforcing member (5) includes a fixing plate (51) having an opening (b) for the external thread column (43) to pass through; The fixing plate (51) includes a U-shaped plate (511) arranged in the channel (41) and clamped with the external thread column (43), and two side plates (512) arranged at both ends of the U-shaped plate (511) and extending into the slot (31).

2. The utility model relates to an integrated pipe gallery according to claim 1, characterized in that: The fixing plate (51) further includes an external thread rod (513) arranged on the surface of the inner wall of the U-shaped plate (511) away from the channel (41); the reinforcing member (5) further includes a cover plate (52) arranged for closing the slot (31), a fixing hole (53) arranged on the cover plate (52) for passing through the external thread rod (513), and a fastening nut (54) screwed on the external thread rod (513) for fixing the cover plate (52).

3. The utility model relates to an integrated pipe gallery according to claim 2, 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 distance between two adjacent external thread columns (43), and the number of the fixing plates (51) located in the slot (31) is greater than or equal to two.

4. The utility model relates to an integrated pipe gallery according to claim 3, characterized in that: The reinforcing member (5) further includes a tightening block (55) arranged on the surface of the cover plate (52) close to the slot (31) and inserted between two adjacent side plates (512).

5. The utility model relates to an integrated pipe gallery according to claim 4, characterized in that: The reinforcing member (5) further includes a first grouting pipeline (56) arranged in the cover plate (52), and a second grouting pipeline (57) arranged on the tightening block (55) and communicating with the first grouting pipeline (56).

6. The utility model relates to an integrated pipe gallery according to claim 5, characterized in that: The fixing plate (51) further includes a first grouting hole (514) arranged on the side plate (512).

7. The utility model relates to an integrated pipe gallery according to claim 1, characterized in that: On the vertical plate (3), there are also at least two second grouting holes (32) close to the bottom plate (1) and the top plate (2) and communicating with the channel (41).

8. The utility model relates to an integrated pipe gallery according to claim 7, characterized in that: At least two auxiliary connecting members (33) are arranged at the connection of the vertical plate (3) with the bottom plate (1) and the top plate (2); the auxiliary connecting member (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).

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