Split mounting type closely-attached pipe jacking pipe joint

Abstract

The invention discloses an assembled closely-attached pipe jacking pipe joint, which belongs to the field of underground pipe jacking construction, and comprises a pipe joint body and a mechanical pipe jacking pushing and inserting adaptive splicing node, the splicing node comprises a convex node and a concave node, and the convex node and the concave node form a self-locking mortise and tenon joint structure. A long-strip sliding groove is formed in a splicing joint through mutual connection of the preceding pipe-jacking pipe joint bodies, an accurate anchor point is provided for later pipe-jacking construction, and the later pipe-jacking pipe joint bodies innovatively use a pushing and inserting jacking construction method, so that the later pipe-jacking is accurately connected with the preceding pipe joint bodies. The problem that in the jacking process of a traditional jacking pipe joint body, the jacking posture of a post-construction jacking pipe is difficult to control is effectively solved, meanwhile, the bending moment of the whole structure can be continuously transmitted between the two rectangular jacking pipes through the splicing joints, and certain seepage-proofing capacity is achieved.

Description

Technical Field

[0001] The invention relates to the field of underground pipe jacking construction, and in particular to an assembled close-fitting pipe jacking section. Background Art

[0002] With the rapid development of underground rail transit construction, it is often inevitable to build underground building structures, such as subway stations, on busy roads in busy urban areas. If the road is blocked and traffic is diverted to facilitate construction, it will not only cause urban traffic congestion, but also incur additional costs due to traffic diversion and affect other facilities. At the same time, if the underground structure to be built is deep in the stratum, it is difficult to achieve the construction demand of completely digging out the upper soil of the structure before constructing the underground structure. In order to cope with such situations, trenchless engineering technology has developed rapidly in recent years due to its construction method of not digging or digging very little on the surface. As one of the three major trenchless technologies, pipe jacking construction technology digs shafts at both ends of the construction section, and with the help of the thrust of the main jacking cylinder and the pipeline relay room, the pipe segments are pushed into the soil between the two shafts in turn, thereby realizing the construction of underground space structures. Because of its significant advantages in stabilizing the soil layer and protecting the environment, pipe jacking construction technology has become an important means to realize large underground deep spaces.

[0003] However, with the increasing development of urbanization, urban space is constantly expanding underground, the number of pipe jacking projects has increased sharply, and it is developing towards larger and longer underground space structures. When the single rectangular cross-section of the existing pipe jacking can no longer meet the needs of large underground spaces, the emergence of double-hole pipe jacking close-fitting construction has opened the prelude to rectangular combined large-section pipe jacking close-fitting jacking construction. Through the parallel close-fitting construction of two pipe jackings, the temporary entity on the close-fitting surface after construction is dismantled and corresponding reinforcement measures are taken to transform the temporary structure and permanent structure into a system, thereby realizing the construction of a larger space deep underground. In a subway station project on Shenzhen Metro Line 12, the world's largest combined rectangular cross-section pipe jacking machine, combined with multi-hole close-fitting jacking construction technology, was put into practice for the first time.

[0004] Although relevant engineering examples of double-hole close-fitting pipe jacking construction have been implemented, due to the limited existing research and lack of engineering experience, there is a lot of room for improvement in the close-fitting jacking construction technology. On the one hand, during the close-fitting pipe jacking construction process, despite the support of relevant close-fitting jacking technology, due to the relatively independent jacking process of the double-hole jacking pipe, centimeter-level macroscopic construction gaps will inevitably appear between the rectangular jacking pipe channels. This makes it impossible for the bending moment of the entire structure to be continuously transmitted between the two rectangular jacking pipes, and also makes the entire structure face severe anti-seepage challenges. On the other hand, the independent jacking process also makes it difficult to control the jacking posture of the subsequent construction jacking pipe, which also makes the macroscopic gaps between the close-fitting pipe sections on different cross sections different. This uncertainty brings great difficulties to engineering construction, subsequent operation and maintenance, and simulation calculations. After the close-fitting pipe jacking construction is completed, although the connection problem between the multi-hole close-fitting pipes will be solved in subsequent projects by adding longitudinal beams and grouting in the longitudinal beams, so as to barely meet the structural stress and anti-seepage needs, in fact, these measures only temporarily solve the above problems in terms of results. From the perspective of structural toughness, this has, to a certain extent, brought a greater burden to the stability of the overall toughness performance of the structure. In addition, due to its uncertain macroscopic gaps that are difficult to simulate and calculate, it is impossible to accurately predict the risks of closely fitting structures, which poses a huge safety hazard to underground structures in subsequent operations. Summary of the invention

[0005] The present invention aims to provide an assembled close-fitting jacking pipe section to solve the problem that, on the one hand, the jacking process of the double-hole jacking pipe is relatively independent, and the bending moment of the entire structure cannot be continuously transmitted between the two rectangular jacking pipes, which also makes the entire structure face severe anti-seepage challenges; on the other hand, the independent jacking process also makes it difficult to control the jacking posture of the subsequent construction jacking pipe.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] An assembled close-fitting top pipe section comprises a pipe section body and a splicing node, wherein the pipe section body is in the shape of a rectangular frame, and a concave ladder structure and a convex ladder structure are respectively arranged at the front and rear of the pipe section body, and a plurality of pipe section bodies are longitudinally spliced ​​into a pipe section channel through the concave ladder structure and the convex ladder structure, and a splicing node for connecting two laterally adjacent pipe section bodies is arranged on the side of the pipe section body, and the splicing node comprises a convex node and a concave node, and the convex node and the concave node constitute a self-locking mortise and tenon structure, and a plurality of pipe section bodies are longitudinally abutted to align the splicing nodes to form a long slide groove, and the convex node or the convex node can slide in the corresponding long slide groove.

[0008] Furthermore, the splicing node is provided with a chamfer structure.

[0009] Furthermore, the pipe segment body includes a transverse block and a vertical block, the side of the transverse block is provided with a concave node or a convex node, two transverse blocks and two vertical blocks are spliced ​​to form the pipe segment body, and the vertical block includes a temporary column and a permanent column;

[0010] The joint surface between the temporary column and the transverse block is an inclined surface. The temporary column and the transverse block are connected through a temporary connection node. The temporary connection node includes a convex point and a slideway groove. The slideway groove runs through the interior of the pipe segment body and enables the convex point to slide out.

[0011] The joint surface of the permanent column and the transverse block is a plane. The permanent column and the transverse block are connected through a permanent connection node. The permanent connection node includes a connecting tenon and a closed groove. The closed groove and the connecting tenon are spliced ​​and fixed to the permanent column.

[0012] Furthermore, the temporary column is fixed against the temporary column by an inner support column arranged inside the pipe section channel, and the inner support column can change its length for support or removal.

[0013] Furthermore, the temporary columns and permanent columns are used alternately longitudinally.

[0014] Furthermore, the convex node is wide outside and narrow inside, and the concave node is in a shape that fits with the convex node.

[0015] Furthermore, no splicing node is provided on the side of the pipe segment body in contact with the underground soil layer.

[0016] Furthermore, reinforcement measures need to be taken after the pipe segment splicing construction.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The present invention forms a long slide groove at the splicing node by connecting the pipe sections of the first jacking pipe to each other, providing an accurate anchor point for the subsequent jacking pipe construction, and the pipe sections of the subsequent jacking pipe innovatively use a push-in and jacking construction method, so that the subsequent jacking pipe is accurately connected to the first pipe section. The problem of the difficulty in controlling the jacking posture of the subsequent jacking pipe in the jacking process of the traditional jacking pipe section is effectively solved. At the same time, the bending moment of the entire structure can also be continuously transmitted between the two rectangular jacking pipes through the splicing node, and it has a certain anti-seepage ability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the construction of a kind of assembled close fitting jacking pipe section and then pushing and inserting the jacking pipe section body;

[0020] Figure 2 It is a schematic diagram of the construction of a kind of assembled close fitting jacking pipe segment, which is the first jacking pipe segment body pushing and inserting;

[0021] Figure 3 It is an exploded schematic diagram of a permanent column of an assembled close-fitting jacking pipe section;

[0022] Figure 4 It is a schematic diagram of explosion of a temporary column of assembled close-fitting jacking pipe section;

[0023] Figure 5 It is a front view schematic diagram of an inner support column of a temporary column of an assembled close-fitting jacking pipe section;

[0024] Figure 6 It is a schematic diagram of the reverse side of the inner support column of a temporary column of an assembled close-fitting jacking pipe section;

[0025] Figure 7 It is a schematic diagram of a three-channel temporary column of an assembled close-fitting top pipe section that has not been removed;

[0026] Figure 8 It is a schematic diagram of a three-channel assembled close-fitting jacking pipe section with temporary columns removed;

[0027] Fig. 9 It is an overall schematic diagram of a second embodiment of an assembled close-fitting jacking pipe section.

[0028] The reference numerals in the drawings of the specification include:

[0029] 1. Pipe segment body; 101. Concave ladder structure; 102. Concave ladder structure; 2. Splicing node; 201. Concave node; 202. Concave node; 3. Pipe segment channel; 4. Long slide groove; 5. Chamfered structure; 6. Horizontal block; 7. Vertical block; 701. Temporary column; 702. Permanent column; 8. Temporary connection node; 801. Concave point; 802. Slide groove; 9. Permanent connection node; 901. Connection tenon; 902. Closed groove; 10. Inclined surface; 11. Plane; 12. Inner support column; 13. Propeller jack; 14. Propelling structure; 15. Tunneling machine; 16. Cutter head assembly. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments:

[0031] Embodiment 1

[0032] like Figure 1-8As shown, an assembled close-fitting top pipe segment includes a segment body 1 and a splicing node 2. The segment body 1 is in the shape of a rectangular frame. A concave ladder structure 101 and a convex ladder structure 102 are respectively provided at the front and rear of the segment body 1. A plurality of segment bodies 1 are longitudinally spliced ​​into a segment channel 3 through the concave ladder structure 101 and the convex ladder structure 102. A splicing node 2 connecting two laterally adjacent segment bodies 1 is provided on the side of the segment body 1. The splicing node 2 is provided with a chamfer structure 5. The splicing node 2 includes a convex node 201 and a concave node 202. The convex node 201 and the concave node 202 constitute a self-locking mortise and tenon structure. A plurality of segment bodies 1 are longitudinally abutted to align the splicing nodes 2 to form a long slide groove 4. The convex node 201 or the convex node 201 can slide in the corresponding long slide groove 4.

[0033] The pipe segment body 1 includes a transverse block 6 and a vertical block 7. A concave node 202 or a convex node 201 is provided on the side of the transverse block 6. Two transverse blocks 6 and two vertical blocks 7 are spliced ​​to form the pipe segment body 1. The vertical block 7 includes a temporary column 701 and a permanent column 702. The splicing surface of the temporary column 701 and the transverse block 6 is an inclined surface 10. The temporary column 701 is connected to the transverse block 6 through a temporary connection node 8. The temporary connection node 8 includes a convex point 801 and a slide groove 802. The slide groove 802 runs through the interior of the pipe segment body 1. , which can make the protrusion 801 slide out, and the temporary column 701 is fixed against the internal support column 12 arranged inside the pipe section channel 3, and the internal support column 12 can change the length for support or disassembly; the splicing surface between the permanent column 702 and the transverse block 6 is a plane 11, and the permanent column 702 is connected to the transverse block 6 through a permanent connection node 9, and the permanent connection node 9 includes a connecting tenon 901 and a closed groove 902, and the closed groove 902 and the connecting tenon 901 are spliced ​​and fixed to the permanent column 702.

[0034] At the pipe jacking construction site, after the shaft is dug, a crane is used to transport the horizontal block 6 and the vertical block 7 of the pipe segment body 1 to the jacking site for assembly, and the two horizontal blocks 6 and the two vertical blocks 7 are connected, wherein the vertical block 7 includes a temporary column 701 and a permanent column 702. It is worth mentioning that the pipe segment body 1 of the temporary column 701 has a slideway groove 802 in its temporary connection node 8 that completely penetrates the interior of the pipe segment body 1, and in order to facilitate subsequent disassembly, the splicing surface is designed as a small-angle inclined surface 10. Therefore, during the jacking process of the pipe segment body 1 using the temporary column 701, it is necessary to install an internal support column 12 to abut and fix the temporary column 701, and the internal support column 12 can change its length for abutment support or disassembly.

[0035] Subsequently, the assembled single pipe segment 1 is connected to the rear of the tunnel boring machine 15, and the thrust of the propulsion structure 14, the jack, and the pipeline relay room is used to push the cutter head group 16 on the tunnel boring machine 15 to push and excavate the soil, and then the pipe segment 1 that was pushed first is pushed in turn. It should be noted that there should be a certain quantitative relationship between the pipe segment 1 of the temporary column 701 and the segment structure of the permanent column 702 pipe, and the jacking construction should be carried out alternately. As shown in this embodiment, after every three temporary column 701 pipe segment 1 jacking construction, one permanent column 702 pipe segment 1 jacking construction is carried out, but the quantitative relationship needs to be further confirmed according to the actual situation.

[0036] When the pipe jacking construction is performed first, the concave ladder structure 101 and the convex ladder structure 102 arranged at the front and rear of the pipe segment body 1 are longitudinally connected to form a pipe segment channel 3. The pipe segment channel 3 formed by splicing the convex ladder structure 102 and the concave ladder structure 101 is more stable. A splicing node 2 for connecting two laterally adjacent pipe segment bodies 1 is arranged on the side of the pipe segment body 1. The splicing node 2 is provided with a chamfer structure 5. The splicing node 2 includes a convex node 201 and a concave node 202. The convex node 201 is in a T-shaped shape that is wide outside and narrow inside. The concave shape of the concave node 202 is concave and fits with the convex node 201 to form a self-locking mortise and tenon structure. Multiple pipe segment bodies 1 are longitudinally abutted to align the concave nodes 202 to form a long slide groove 4, so that the convex node 201 can slide in the long slide groove 4. Similarly, multiple pipe segment bodies 1 are longitudinally abutted to align the convex nodes 201 to form a long slide groove 4, so that the concave node 202 can slide in the long slide groove 4. The long slide provides an accurate anchor point for subsequent jacking construction, which solves the problem that the jacking posture of the subsequent jacking pipe is difficult to control during the jacking process of the traditional jacking pipe segment body 1. At the same time, the bending moment of the entire structure can also be continuously transmitted between the two rectangular jacking pipes through the splicing node 2, and it has a certain anti-seepage ability.

[0037] After the first pipe jacking construction is completed to form the pipe segment channel 3, the subsequent pipe jacking construction is carried out. Similarly, after being assembled into a single pipe segment body 1, it is connected to the tail of the tunnel boring machine 15, and the tunnel boring machine 15 and the propulsion structure 14 are used to carry out the jacking construction. In this process, while the tunnel boring machine 15 is cutting the soil, it is necessary to take certain measures to clean the formed long slide trough 4, such as using a high-pressure water gun for cleaning. At the same time, the convex node 201 and the concave node 202 of the subsequent pipe segment body 1 will be embedded in the corresponding long slide groove 802, and the push-in jacking construction will be carried out in turn. First, the slide groove 802 has been cleaned, and secondly, the splicing node 2 is provided with a chamfering structure 5, which will make the splicing node 2 enter the corresponding slide groove 802 more smoothly. The specific schematic diagram of the push-in jacking construction is shown in the figure. Figure 1At the same time, the subsequent pipe segment 1 will also follow the quantity relationship set during the construction of the preceding pipe segment 1. For example, in this embodiment, after every three temporary columns 701 pipe segment 1 are jacked, a permanent column 702 pipe segment 1 is jacked.

[0038] The successful completion of the subsequent pipe jacking construction also formed a pipe segment channel 3, which was then spliced ​​with the previous pipe segment channel 3 to form a multi-hole pipe jacking structure. Figure 7 Then, the inner support column 12 is taken out, and the temporary column 701 is disassembled, and the multi-hole jacking structure finally formed is as shown in FIG. Figure 8 shown.

[0039] It is necessary to take relevant reinforcement measures such as adding longitudinal beams and injecting grouting into the longitudinal beams according to actual engineering needs and structural mechanics requirements.

[0040] If the structural mechanics and anti-seepage requirements are met, the above process can be repeated to carry out three or even multiple holes of close-fitting pipe jacking, thereby realizing a larger spatial structure deep underground. It is worth mentioning that the side of the structure finally formed in contact with the underground soil layer should not have a protruding splicing node 2, that is, the pipe segment 1 on the outside of the structure should be a single splicing node 2 structure pipe segment 1.

[0041] Embodiment 2

[0042] like Fig. 9 As described, a splicing node 2 for connecting two laterally adjacent pipe segment bodies 1 is arranged on the side of the pipe segment body 1, and the splicing node 2 includes a convex node 201 and a concave node 202, and the convex node 201 and the concave node 202 constitute a self-locking mortise and tenon structure, and multiple pipe segment bodies 1 are longitudinally abutted to align the splicing nodes 2 to form a long slide groove 4, and the convex node 201 or the convex node 201 can slide in the corresponding long slide groove 4.

[0043] The above is only an embodiment of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. An assembled close fitting jacking pipe section, characterized in that: The invention comprises a pipe segment body (1) and a splicing node (2), wherein the pipe segment body (1) is in the shape of a rectangular frame, and the pipe segment body (1) is respectively provided with a concave ladder structure (101) and a convex ladder structure (102) at the front and rear, and a plurality of pipe segment bodies (1) are longitudinally spliced ​​into a pipe segment channel (3) through the concave ladder structure (101) and the convex ladder structure (102), and a splicing node (2) for connecting two transversely adjacent pipe segment bodies (1) is provided on the side of the pipe segment body (1), and the splicing node (2) comprises a convex node (201) and a concave node (202), and the convex node (201) and the concave node (202) form a self-locking mortise and tenon structure, and a plurality of pipe segment bodies (1) are longitudinally abutted to align the splicing nodes (2) to form a long strip slide groove (4), and the convex node (201) or the convex node (201) can slide in the corresponding long strip slide groove (4).

2. The assembled close fitting jacking pipe section according to claim 1 is characterized in that: The splicing node (2) is provided with a chamfer structure (5).

3. The assembled close fitting jacking pipe section according to claim 1 is characterized in that: The pipe segment body (1) comprises a transverse block (6) and a vertical block (7), the side of the transverse block (6) is provided with a concave node (202) or a convex node (201), two transverse blocks (6) and two vertical blocks (7) are spliced ​​to form the pipe segment body (1), and the vertical block (7) comprises a temporary column (701) and a permanent column (702); The joint surface between the temporary column (701) and the transverse block (6) is an inclined surface (10); the temporary column (701) and the transverse block (6) are connected via a temporary connection node (8); the temporary connection node (8) comprises a protruding point (801) and a slideway groove (802); the slideway groove (802) passes through the interior of the pipe segment body (1) and enables the protruding point (801) to slide out; The joint surface between the permanent column (702) and the transverse block (6) is a plane (11); the permanent column (702) and the transverse block (6) are connected via a permanent connection node (9); the permanent connection node (9) comprises a connection tenon (901) and a closed groove (902); the closed groove (902) and the connection tenon (901) are spliced ​​and fixed to the permanent column (702).

4. The assembled close fitting jacking pipe section according to claim 3 is characterized by: The temporary pillar (701) is fixed against an inner support pillar (12) arranged inside the pipe section channel (3); the inner support pillar (12) can be changed in length for support or removal.

5. The assembled close fitting jacking pipe section according to claim 4 is characterized in that: The temporary columns (701) and the permanent columns (702) are used alternately in the longitudinal direction.

6. The assembled close fitting jacking pipe section according to any one of claims 1 to 5, characterized in that: The convex node (201) is in a shape that is wide on the outside and narrow on the inside, and the concave node (202) is in a shape that fits with the convex node (201).

7. The assembled close fitting jacking pipe section according to claim 6 is characterized by: The side of the pipe segment body (1) in contact with the underground soil layer is not provided with a splicing node (2).

8. The assembled close fitting jacking pipe section according to claim 7 is characterized by: After the pipe segment (1) is spliced, reinforcement measures need to be taken.

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