Backrest supporting structure for pipe jacking construction

Abstract

The utility model relates to the technical field of pipe jacking construction, in particular to a backrest supporting structure for pipe jacking construction, which comprises a working well which forms an annular anchoring and shotcreting wall in a foundation pit in an anchoring and shotcreting mode, and is characterized by further comprising a backrest plate which is arranged at the bottom of the working well and is positioned at a pipe penetrating position, the backrest plate is of a concrete structure and is integrally formed with the working well, the jacking pipe penetrates through the backrest plate, a movable supporting device is arranged on the other side of the backrest plate, the supporting device comprises a steel box body supported on the backrest plate, and a pushing mechanism used for pushing the jacking pipe is supported on the steel box body; the steel box body is of a hollow structure, and concrete can be poured into the steel box body. The effect of improving the utilization rate of the supporting wall is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipe jacking construction, and particularly relates to a backrest support structure for pipe jacking construction. BACKGROUND

[0002] Pipe jacking construction is a kind of trenchless construction method, which can realize pipe burying without or with less excavation. In pipe jacking engineering, workers excavate a working well from the ground by using excavating equipment, and the pipe is pushed into the soil according to the designed slope and direction by overcoming the friction between the pipe and the surrounding soil through the jacking force generated by the jacking equipment in the working well. A support mechanism and a pushing mechanism are arranged in the working well, which are used for supporting the pipe and controlling the forward pushing of the pipe, and the pipe is pushed to a receiving well outside the working well by a certain length through the pushing mechanism, so that the pipe is pulled out from the receiving well.

[0003] In the pipe jacking construction process, the support mechanism needs to be supported on the side surface of the working well. In order to avoid damage to the excavated working well, a support wall needs to be arranged on the surface of the working well for support. The existing support wall is directly arranged on the side surface of the foundation pit, and one side of the support wall is used for supporting the pushing mechanism, and the other side of the support wall directly contacts with the soil body. Therefore, the pushing force generated by the pushing mechanism is absorbed by the support wall. The existing support wall is usually formed by pouring concrete, and the steel bars are bound together with the inner lining wall before the pipe jacking construction, and the whole is poured with concrete.

[0004] Although the support wall in the existing construction meets the requirements of structural stability and strong bearing capacity, the steel reinforced concrete support wall has no utilization value after being made at one time, and the steel and concrete materials are wasted. In addition, the steel reinforced concrete support wall has a long solidification and molding time, which reduces the progress of the pipe jacking construction. CONTENT OF THE UTILITY MODEL

[0005] In order to improve the utilization rate of the support wall, the present application provides a backrest support structure for pipe jacking construction.

[0006] The backrest support structure for pipe jacking construction provided by the present application adopts the following technical scheme:

[0007] The backrest support structure for pipe jacking construction comprises a working well, the working well is formed into an annular anchor spray wall in the foundation pit in an anchor spray manner, further comprises a backrest plate arranged at the bottom of the working well and located at a pipe passing position, the backrest plate is a concrete structure and is integrally formed with the working well, the pipe jacking passes through the backrest plate, and a movable support device is arranged on the other side of the backrest plate, the support device comprises a steel box body supported on the backrest plate, and a pushing mechanism for pushing the pipe jacking is supported on the steel box body; the steel box body is a hollow structure, and the inside of the steel box body can be filled with concrete.

[0008] By adopting the technical scheme, in the pipe jacking construction process, the support device is installed on the opposite side of the working well where the staff is located, the pre-processed steel box is hoisted and placed at the corresponding position, so that the pushing mechanism can support the steel box, the prefabricated steel box can be conveniently moved, and the steel box can be customized according to the actual needs of the construction site, and the steel box production and processing are more convenient and fast than cast-in-place concrete.

[0009] Optionally, the steel box is provided in the working well, and the plurality of steel boxes are arranged in an array on the backrest plate and form a steel box wall, and the pushing mechanism supports the plurality of steel boxes.

[0010] By adopting the technical scheme, the plurality of steel boxes are combined, and can be more flexible and variable during use, and different numbers of steel boxes can be selected for stacking according to actual needs, so that the steel boxes can adapt to different pushing mechanisms, so that the pushing mechanism can push the pipe jacking of different diameters.

[0011] Optionally, the plurality of steel boxes are provided with a connecting assembly, the connecting assembly comprises a support rod horizontally arranged at the bottom of the working well, the steel box is placed on the support rod, a plurality of vertical limiting rods are arranged on the steel box, and the steel box is installed between adjacent two limiting rods.

[0012] By adopting the technical scheme, when installing and combining different numbers of steel boxes, the connecting assembly can connect and fix the plurality of steel boxes, so that the plurality of steel boxes are prevented from falling during use. When installing, the steel boxes are stacked on the support rod, and the limiting rods can limit the steel boxes in the horizontal direction to prevent them from falling to the adjacent position.

[0013] Optionally, a plurality of insertion grooves are formed in the support rod, and the limiting rods are inserted and matched in the corresponding insertion grooves.

[0014] By adopting the technical scheme, when the connecting assembly is arranged, the lower end of the limiting rod is inserted and matched into the insertion groove, so that the limiting rod and the support rod are connected as a whole, and a plurality of rows of steel boxes can be connected as a whole, the stability of the steel box wall is increased, the steel box is supported on the backrest plate, and the force of the pushing mechanism acting on the surrounding of the working well is better dispersed.

[0015] Optionally, the limiting rod is in a I-shaped structure, and the steel box can be slidably inserted between adjacent two limiting rods.

[0016] By adopting the technical scheme, the I-shaped limiting rod is arranged, the two sides of the steel box can be slidably inserted into the sliding groove of the limiting rod, the steel box is limited, and the stability between the plurality of steel boxes in the row is increased; in addition, the limiting rod can facilitate the staff to stack the plurality of steel boxes.

[0017] Optionally, a plurality of said limiting rods are horizontally provided with a tension rod, and the tension rod is arranged on the upper ends of the plurality of limiting rods, both ends of the tension rod are fixedly connected with the outermost two limiting rods, and a tension assembly is arranged on the limiting rods at both ends of the tension rod.

[0018] By adopting the above technical scheme, when the steel box wall is installed, the tension rod is arranged between the plurality of limiting rods, and the tension rod is fixedly connected through the arranged tension assembly, so that the plurality of limiting rods are tightly connected, and the plurality of separate steel boxes are more firmly connected, thereby avoiding shaking in use.

[0019] Optionally, a plurality of said limiting rods are horizontally provided with a tension rod, and the tension rod is arranged on the upper ends of the plurality of limiting rods, both ends of the tension rod are fixedly connected with the outermost two limiting rods, and a tension assembly is arranged on the limiting rods at both ends of the tension rod.

[0020] By adopting the above technical scheme, a plurality of tension rods can be arranged between the upper and lower steel boxes, when a layer of steel box is installed, a tension rod is arranged to tightly fix the installed steel box, thereby avoiding that the stability of the steel box is poor when the number of stacked steel boxes is large, and the steel box cannot be effectively fixed.

[0021] Optionally, said tension assembly comprises a linkage frame slidingly arranged on the limiting rod and a plurality of tension blocks fixedly arranged on the linkage frame, said tension blocks are correspondingly arranged at the ends of the tension rod, said tension blocks are conical blocks, a tension hole is arranged at the end of the tension rod, and said tension blocks are slidingly inserted into the tension hole.

[0022] By adopting the above technical scheme, when the plurality of tension rods are fixedly connected, the linkage frame is slidingly arranged on the limiting rod, the plurality of tension blocks on the linkage frame are correspondingly inserted into the tension hole, and the linkage frame is controlled to slide downward, so that the tension blocks are clamped into the tension hole according to their own shape, and finally the ends of the tension rod are fixed.

[0023] Optionally, said support rod is symmetrically provided with a locking assembly at both ends, said locking assembly comprises a locking screw rotatingly arranged on the support rod and a locking block fixedly arranged on the linkage frame, a locking hole is arranged on said locking block, a free end of said locking screw can be rotated into the locking hole, a locking nut is threadedly connected to the upper end of the locking screw, and said locking nut can be tightly rotated against the locking block.

[0024] By adopting the above technical scheme, when the tension block is clamped into the tension hole, the linkage frame is easily upwardly slid under the action of external force, so that the tension block is slid out of the tension hole, the locking screw is rotated into the locking hole by rotating the locking screw, and the locking nut is tightly rotated against the locking block, thereby the linkage frame is tightly fixed.

[0025] Optionally, the pipe is closed by brickwork at the pipe opening close to the steel box, and a rubber pad is arranged between the pipe and the backrest plate.

[0026] By adopting the technical scheme, the rubber pad and the brick wall can close the end of the pipe after construction in the pipe jacking construction, preventing sundries in the working well from entering the pipe.

[0027] In summary, the present application has at least one of the following beneficial technical effects:

[0028] In the pipe jacking construction process, the prefabricated steel box is filled with concrete inside, which not only ensures the structural strength of the steel box itself, but also facilitates production and manufacturing. Different numbers of steel boxes can be pre-processed, and different numbers of steel boxes can be selected for assembly according to the needs of construction, so as to form a steel box wall that can support the propulsion mechanism. In the construction process, the construction efficiency is improved, the time wasted when waiting for the concrete to be formed is avoided, and the prefabricated steel box can be reused in other constructions after use.

[0029] The connecting assembly, the tensioning assembly and the locking assembly can neatly stack multiple boxes and connect and fix the stacked multiple steel boxes, so as to form a whole, avoid tilting and scattering of multiple steel boxes during pipe jacking, and more quickly assemble the steel boxes during assembly, improving work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a schematic diagram of the overall structure of the embodiment of the present application.

[0031] Figure 2 is a schematic diagram of the connecting assembly of the embodiment of the present application.

[0032] Figure 3 is a schematic diagram of the tensioning assembly and the locking assembly of the embodiment of the present application.

[0033] BRIEF DESCRIPTION OF DRAWINGS: 1, working well; 11, backrest plate; 2, support device; 21, steel box; 22, connecting assembly; 221, support rod; 222, limiting rod; 223, plug-in slot; 224, tensioning rod; 225, connecting plate; 23, tensioning assembly; 231, linkage frame; 232, tensioning block; 233, tensioning hole; 24, locking assembly; 241, locking screw; 242, locking block; 243, locking hole; 244, locking nut. DETAILED DESCRIPTION

[0034] The following will be described in detail in combination with the drawings. Figures 1-3 The present application will be further described in detail.

[0035] The embodiment of the application discloses a backrest support structure for pipe jacking construction.

[0036] Refer to Figure 1 A backrest support structure for pipe jacking construction, comprising a working well 1 formed by excavation on the ground, the inner periphery and the bottom surface of the working well 1 are formed into an annular anchor spray wall in the foundation pit by adopting anchor spray (anchor rod and sprayed concrete), the pipe to be set is arranged at the well bottom of the working well 1, and the pipe is set in the soil around the working well 1 by a pushing mechanism. In the embodiment of the application, the working well 1 described can be used as the working well 1 for pushing the pipe and can also be used as the receiving well for receiving the pipe set in the adjacent working well 1. In addition, the working well 1 can push the pipe in the two adjacent working wells 1 in two directions, but not at the same time. When the pipe on one side is pushed to the end, the pipe on the other side is pushed.

[0037] A backrest plate 11 is arranged in the working well 1 and close to the position where the pipe is set, the backrest plate 11 is formed by pouring and molding concrete and is integrally formed with the working well 1 at the same time. A movable support device 2 is arranged on the side of the backrest plate 11 away from the side surface of the working well 1, the support device 2 can be placed at the pipe opening of the pipe and can also be placed at the pipe opening of the pipe set outward, and the support device 2 can be used in the process of pushing the pipe in two directions. The support device 2 comprises a steel box 21 arranged on the backrest plate 11, the steel box 21 is a hollow structure, the inside of the steel box 21 can be filled with concrete, and a hook is arranged in the steel box 21, which facilitates hoisting the steel box 21 by using equipment, thereby facilitating the movement of the steel box 21. The steel box 21 adopts a prefabricated structure, which can be quickly installed on the backrest plate 11 during use. In addition, the pushing mechanism can support the steel box 21 during use, and the force is dispersed and transmitted to the soil around the working well 1 through the steel box 21, thereby avoiding direct damage to the soil.

[0038] Refer to Figure 1 The steel box 21 is provided with a plurality of steel boxes 21, the plurality of steel boxes 21 are stacked on the backrest plate 11 and are arrayed along the length direction and the height direction of the backrest plate 11, a steel box 21 wall is formed on the backrest plate 11, and the pushing mechanism supports the steel box 21 wall formed by the plurality of steel boxes 21 during pushing the pipe. The plurality of steel boxes 21 are combined, which is more convenient during use. Different numbers of steel boxes 21 can be selected according to actual needs to be stacked, so that the steel boxes 21 can adapt to different pushing mechanisms, thereby enabling the steel boxes 21 to push the pipes with different diameters.

[0039] Refer to Figure 2 and Figure 3A plurality of steel boxes 21 are provided with a connecting assembly 22, the connecting assembly 22 connects the plurality of steel boxes 21 into a whole, the connecting assembly 22 includes a support rod 221 horizontally arranged at the well bottom of the working well 1, the length direction of the support rod 221 is perpendicular to the advancing direction of the pipe jacking, the plurality of steel boxes 21 are stacked on the support rod 221, a plurality of limiting rods 222 are vertically arranged on the support rod 221, the plurality of limiting rods 222 are uniformly arranged along the length direction of the support rod 221, and the steel box 21 is arranged between two adjacent limiting rods 222; a plug-in groove 223 is arranged on the support rod 221 and located at the position of the lower end of the limiting rod 222, the lower end of the limiting rod 222 can be plug-in matched in the plug-in groove 223, so that the limiting rod 222 is connected with the support rod 221; the cross section of the limiting rod 222 is an I-shaped structure, the steel box 21 can be plug-in matched in the sliding groove on the two adjacent limiting rods 222, during installation, the steel box 21 is slid from the upper end of the two limiting rods 222 and placed on the support rod 221, so as to limit the plurality of steel boxes 21 between the two adjacent limiting rods 222, and prevent the steel box 21 from tilting forward or backward.

[0040] A plurality of horizontal tension rods 224 are arranged on the plurality of limiting rods 222, the tension rods 224 are parallel to the support rod 221, an opening is arranged at the same height position of each limiting rod 222, the tension rod 224 passes through the opening on the plurality of limiting rods 222, and the two ends of the tension rod 224 protrude from the two outermost limiting rods 222 and are tightly fixed with the two limiting rods 222, so that the plurality of limiting rods 222 are fixed by the tension rod 224. The plurality of tension rods 224 are uniformly arranged along the height direction of the limiting rod 222, and the plurality of tension rods 224 are arranged in parallel with each other, the steel box 21 is arranged between the upper and lower adjacent tension rods 224, during installation of the spliced steel box 21 wall, the lowermost steel box 21 is placed first, after the placement is completed, the tension rod 224 is arranged, and the steel box 21 and the tension plate are continuously placed in turn until the steel box 21 wall is assembled. A connecting plate 225 is arranged on the side of the plurality of limiting rods 222 in contact with the advancing mechanism, the connecting plate 225 can be arranged on the plurality of limiting rods 222, connecting hooks are arranged at the two ends of the connecting plate 225, the connecting hooks can be hooked at the edge of the limiting plate, so as to fix the connecting plate 225 on the limiting rod 222, and the arranged connecting plate 225 can increase the flatness of the side of the steel box 21 wall, so that the advancing mechanism can better support the steel box 21 wall.

[0041] Referring to Figure 1 and Figure 2A tensioning assembly 23 is arranged on the two limiting rods 222 at the two ends of the tensioning rod 224, the tensioning assembly 23 comprises a linkage frame 231 which is slidingly arranged on the limiting rod 222 and has the same height direction as the limiting rod 222, the linkage frame 231 is a rectangular frame structure and is arranged in a sliding groove of the I-shaped limiting rod 222, a plurality of tensioning blocks 232 are fixed on the linkage frame 231 and are uniformly arranged along the height direction of the linkage frame 231, the number of the tensioning blocks 232 is the same as the number of the tensioning rod 224, and the tensioning blocks 232 are arranged at the end of the tensioning rod 224, a tensioning hole 233 is formed at the end of the tensioning rod 224, the tensioning block 232 is a tapered block which is large at the top and small at the bottom, and the tensioning block 232 is slidingly inserted into the tensioning hole 233 from top to bottom, when the tensioning assembly 23 is installed, the linkage frame 231 is moved to the limiting rod 222, and the plurality of tensioning blocks 232 are aligned with the tensioning hole 233, then the linkage frame 231 is controlled to slide downward, and the tensioning blocks 232 gradually extend into the tensioning hole 233, so that the two ends of the tensioning rod 224 are tensioned, and finally the plurality of limiting rods 222 are tensioned and fixed, so that the steel box 21 is prevented from shaking.

[0042] With reference to Figure 2 And Figure 3 A locking assembly 24 which acts on the linkage frame 231 is symmetrically arranged at the two ends of the supporting rod 221, the locking assembly 24 comprises a locking screw 241 which is rotationally arranged on the supporting rod 221, a locking block 242 which is horizontally arranged is fixed at the lower end of the linkage frame 231, a locking hole 243 which is U-shaped and is used to fix the linkage frame 231 is formed on the locking block 242, the locking screw 241 can be rotated into the locking hole 243, and a locking nut 244 is threadedly connected to the locking screw 241, when the locking screw 241 is rotated onto the locking block 242 and the locking nut 244 is rotated, the locking nut 244 is tightened onto the locking block 242, so that the linkage frame 231 is tensioned and fixed downward, and the plurality of tensioning blocks 232 are always inserted into the tensioning hole 233, so that the tensioning block 232 is prevented from sliding out of the tensioning hole 233 during use.

[0043] During the pipe jacking construction process, the staff fills the gap between one side of the pipe jacking and the backrest plate 11 with a rubber pad, and builds a brick wall at the pipe opening of the pipe jacking to temporarily block the pipe opening, and then installs the steel box 21 at the position of the pipe opening to form a steel box 21 wall which can support the pushing mechanism, so that the sundries in the working well 1 are prevented from entering the pipe jacking which has been constructed.

[0044] The implementation principle of the backrest support structure for pipe jacking construction is as follows: in the pipe jacking construction, workers can splice and install different numbers of steel boxes 21 on the backrest plate 11, so as to form a steel box 21 wall capable of supporting the propelling mechanism on the backrest plate 11; when the different numbers of steel boxes 21 are installed, the multiple steel boxes 21 are connected into a whole through the connection assembly 22, the tensioning assembly 23 and the locking assembly 24, so that the multiple steel boxes 21 are prevented from shaking and scattering during the pipe jacking.

[0045] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A back support structure for pipe jacking construction, comprising a working well (1) which forms an annular anchor wall in a foundation pit in the manner of anchor spraying, characterized in that: Also include the backrest plate (11) set in the working well (1) bottom and located at the pipe through position, the backrest plate (11) is concrete structure and is integrally formed with the working well (1), the pipe passes through the backrest plate (11), and the movable support device (2) is arranged on the other side of the backrest plate (11), the support device (2) includes a steel box (21) supported on the backrest plate (11), and the propelling mechanism is supported on the steel box (21); the steel box (21) is a hollow structure, and the inside can be poured with concrete.

2. The backrest support structure for pipe jacking construction according to claim 1, characterized in that: The steel box (21) is arranged inside the working well (1), and the steel boxes (21) are arranged in an array on the backrest plate (11) and form a steel box (21) wall, and the propelling mechanism is supported on the steel boxes (21).

3. The backrest support structure for pipe jacking construction according to claim 1, characterized in that: A plurality of the steel box (21) is provided with a connecting assembly (22), the connecting assembly (22) includes a support rod (221) arranged horizontally on the bottom of the working well (1), and the steel box (21) is placed on the support rod (221), a plurality of vertical limiting rods (222) are arranged on the steel box (21), and the steel box (21) is installed between two adjacent limiting rods (222).

4. The backrest support structure for pipe jacking construction according to claim 3, characterized in that: The support rod (221) is provided with a plurality of insertion grooves (223), and the limiting rod (222) is inserted and matched in the corresponding insertion groove (223).

5. The backrest support structure for pipe jacking construction according to claim 3, characterized in that: The limiting rod (222) is an I-shaped structure, and the steel box (21) can be slidably inserted between two adjacent limiting rods (222).

6. The backrest support structure for pipe jacking construction according to claim 3, characterized in that: A plurality of the limiting rod (222) is provided with a tension rod (224) horizontally arranged between the limiting rods (222), and the tension rod (224) is arranged at the upper end of the limiting rods (222), the two ends of the tension rod (224) are tensioned and fixed with the outermost two limiting rods (222), and the tension assembly (23) is arranged on the limiting rod (222) at the two ends of the tension rod (224).

7. The backrest support structure for pipe jacking construction according to claim 6, characterized in that: The tension rod (224) is arranged in multiple in the height direction of the limiting rod (222), and the multiple tension rods (224) are arranged between the upper and lower adjacent steel boxes (21).

8. The backrest support structure for pipe jacking construction according to claim 6, characterized in that: The tension assembly (23) includes a linkage frame (231) slidably arranged on the limiting rod (222) and a plurality of tension blocks (232) fixed on the linkage frame (231), the tension blocks (232) are correspondingly arranged at the ends of the tension rod (224), the tension blocks (232) are conical blocks, the tension holes (233) are arranged at the ends of the tension rod (224), and the tension blocks (232) are slidably inserted into the tension holes (233).

9. The back support structure for pipe jacking construction according to claim 3, characterized in that: The support rod (221) is symmetrically provided with locking assemblies (24) at both ends, the locking assembly (24) comprises a locking screw (241) rotatably arranged on the support rod (221) and a locking block (242) fixed on the linkage frame (231), the locking block (242) is provided with a locking opening (243), the free end of the locking screw (241) can be rotatably arranged in the locking opening (243), the upper end of the locking screw (241) is threadedly connected with a locking nut (244), and the locking nut (244) can be rotatably abutted on the locking block (242).

10. The backrest support structure for pipe jacking construction according to claim 1, characterized in that: The pipe is blocked by bricks at the pipe opening close to the steel box (21), and a rubber pad is arranged between the pipe and the back plate (11).

Images