Shaft lining structure for pipe jacking operations

Abstract

The utility model belongs to long -distance pipeline construction technical field discloses a kind of well wall supporting structure for pipe jacking operation, including supporting frame and back wall backplate.Supporting frame includes rear pipe row, front pipe row and two side pipe rows, rear pipe row and front pipe row are respectively attached with the rear inner wall surface and front inner wall surface of working well, two side pipe rows are respectively attached with the two side inner wall surface of working well;Front pipe row is provided with through hole for pipe jacking structure.And rear pipe row, front pipe row and side pipe row all include multiple steel pipes, which are stacked along the depth direction of working well and welded with each other.Back wall backplate is arranged on rear pipe row at a position corresponding to the through hole, the pipe jacking structure can abut against the back wall backplate, and the back wall backplate provides a reaction force to the pipe jacking structure, which can improve the structural strength and reduce the probability of deformation of the rear pipe row.The utility model is made of steel pipes by supporting frame, which can effectively shorten the construction period, without maintenance, and improve the construction efficiency.

Description

Technical Field

[0001] This utility model relates to the field of long-distance pipeline construction technology, and in particular to a well wall support structure for pipe jacking operations. Background Technology

[0002] In the construction of oil and gas pipelines, the support structure of the pipe jacking well for long-distance pipelines is generally made of reinforced concrete. The construction period of reinforced concrete structures is long, and the transportation of commercial concrete relies on tank trucks. In rural areas with narrow roads and limited space, it is difficult to enter the site, and additional temporary access roads need to be built, which increases the construction cost. In addition, reinforced concrete structures cannot be reused after they are formed, and a large amount of construction waste is generated when they are demolished, which does not meet environmental protection requirements. Utility Model Content

[0003] The purpose of this utility model is to provide a well wall support structure for pipe jacking operations, which can effectively shorten the construction cycle, eliminate the need for maintenance, and improve construction efficiency; the steel pipe can be recycled and reused, no construction waste is generated, and the steel pipe is easy to transport.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A wellbore support structure for pipe jacking operations is installed inside the working well and used to support the surrounding area of ​​the working well. The wellbore support structure for pipe jacking operations includes:

[0006] The support frame includes a rear pipe row, a front pipe row, and two side pipe rows. The rear pipe row and the front pipe row are spaced apart along the front-rear direction of the working shaft and respectively attached to the rear inner wall and the front inner wall of the working shaft. The two side pipe rows are spaced apart along the left-right direction of the working shaft and respectively attached to the two side inner walls of the working shaft. The two ends of the side pipe rows along the front-rear direction of the working shaft are respectively welded to the rear pipe row and the front pipe row. The front pipe row is provided with a through opening for the jacking pipe structure. The rear pipe row, the front pipe row, and the side pipe rows all include multiple steel pipes stacked and welded together along the depth direction of the working shaft.

[0007] The back wall back panel is installed on the rear pipe row at a position corresponding to the through opening, and the jacking pipe structure can abut against the back wall back panel.

[0008] In one embodiment, the rear back wall panel is detachably connected to the rear pipe row.

[0009] In one embodiment, the outer circumferential surface of the steel pipe in the rear pipe row is provided with four right-angle plates, the inner angles of the four right-angle plates are distributed facing each other and form an installation space, and the rear back wall back panel is detachably embedded in the installation space.

[0010] In one embodiment, at least one of the right-angle plates is provided with a first threaded hole, and a limiting screw is screwed into the first threaded hole. The limiting screw is capable of abutting against the side of the back wall plate away from the rear pipe row.

[0011] In one embodiment, the well wall support structure for pipe jacking operations further includes flange anchors disposed at the ends of the pipe jacking structure. The pipe jacking structure is flexibly abutted against the back wall plate through the flange anchors, and the flange anchors can be adjusted in size according to the outer diameter of the pipe jacking structure.

[0012] In one embodiment, the flange anchor includes four anchor plates and four anchor fasteners. The anchor plates are capable of abutting against the back wall panel, and a flexible pad is provided on the side of the anchor plate that abuts against the back wall panel. Each anchor plate is provided with two connecting blocks, and each connecting block is provided with a connecting hole. The four anchor plates are distributed in a 2x2 matrix, and an anchor fastener passes through the connecting holes of the two connecting blocks opposite each other on any two adjacent anchor plates. When the anchor fasteners are tightened, they can bring the corresponding two anchor plates closer together, so that the jacking pipe structure is clamped between the eight connecting blocks.

[0013] In one embodiment, a triangular plate is welded between any two opposite steel pipes in the rear pipe bank and the side pipe bank, and between any two opposite steel pipes in the front pipe bank and the side pipe bank.

[0014] In one embodiment, sealing plates are welded to both ends of the steel pipe.

[0015] In one embodiment, along the left-right direction of the working well, the front pipe is welded with reinforcing pipes on both sides of the through opening.

[0016] In one embodiment, the pipe jacking structure includes a pipe jacking machine and a plurality of jacking pipes, the back of the pipe jacking machine abutting against the back wall back plate, and the jacking pipes passing through the through opening;

[0017] The dimension of the through opening along the depth direction of the working well is greater than the outer diameter of the jacking pipe, and the difference between the two is between 50mm and 100mm.

[0018] The dimension between the two reinforcing tubes is greater than the outer diameter of the jacking tube, and the difference between the two is between 50mm and 100mm.

[0019] The beneficial effects of this utility model are as follows:

[0020] The well wall support structure for pipe jacking provided by this utility model is made of welded steel pipes for the support frame, which can effectively shorten the construction cycle, eliminate the need for maintenance, and improve construction efficiency; the steel pipes can be recycled and reused, generating no construction waste, and are easy to transport; in addition, by setting a back wall back plate at the rear pipe row to provide reaction force for the pipe jacking structure, the overall structural strength can be improved. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the well wall support structure for pipe jacking operations provided in this embodiment of the utility model;

[0022] Figure 2 This is a structural schematic diagram of the rear pipe row, rear back wall back plate, and flange anchor involved in the embodiment of this utility model;

[0023] Figure 3 This is a first-view structural schematic diagram of the flange anchor involved in the embodiment of this utility model;

[0024] Figure 4 This is a second-view structural schematic diagram of the flange anchor involved in the embodiment of this utility model.

[0025] In the picture:

[0026] 100. Pipe jacking structure; 101. Pipe jacking machine; 102. Pushing pipe;

[0027] 1. Support frame; 11. Rear pipe row; 111. Right angle plate; 112. Limiting screw; 12. Front pipe row; 121. Through port; 122. Reinforcing pipe; 13. Side pipe row;

[0028] 2. Back wall back panel;

[0029] 3. Flange anchors; 31. Anchor plates; 311. Connecting blocks; 32. Anchor fasteners; 33. Flexible pads;

[0030] 4. Triangle ruler. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0032] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0033] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0034] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0035] like Figures 1-4 As shown, this utility model embodiment provides a well wall support structure for pipe jacking operations, which is installed inside the working well and used to support the surrounding area of ​​the working well to prevent the working well from collapsing.

[0036] The well wall support structure for pipe jacking operations includes a support frame 1 and a back wall plate 2. The support frame 1 includes a rear pipe row 11, a front pipe row 12, and two side pipe rows 13. The rear pipe row 11 and the front pipe row 12 are spaced apart along the front-rear direction of the working well and respectively adhere to the rear inner wall and front inner wall of the working well. The two side pipe rows 13 are spaced apart along the left-right direction of the working well and respectively adhere to the two side inner walls of the working well. The two ends of the side pipe rows 13 along the front-rear direction of the working well are welded to the rear pipe row 11 and the front pipe row 12 to form an integral structure for supporting the working well. The front pipe row 12 is provided with a through opening 121 for the pipe jacking structure 100. The rear pipe row 11, the front pipe row 12, and the side pipe rows 13 each include multiple steel pipes stacked and welded together along the depth direction of the working well. Multiple steel pipes in the front pipe row 12 near the bottom of the working well are cut in the middle to remove some material, forming the through opening 121.

[0037] The back wall back plate 2 is set on the rear pipe row 11 at the position corresponding to the through opening 121. The jacking pipe structure 100 can abut against the back wall back plate 2. The back wall back plate 2 provides a reaction force to the jacking pipe structure 100, which can improve the structural strength and reduce the probability of deformation of the rear pipe row 11.

[0038] It is understood that the pipe jacking structure 100 includes a pipe jacking machine 101 and multiple jacking pipes 102. The pipe jacking machine 101 is used to abut against the back wall back plate 2. The multiple jacking pipes 102 are placed into the working shaft one by one, and the jacking pipes 102 are pushed forward one by one through the through port 121 by the pipe jacking machine 101. The specifications of the pipe jacking machine 101 are selected according to the outer diameter of the jacking pipes 102.

[0039] The well wall support structure used for pipe jacking operations is made of steel pipe welded through the support frame 1, which can effectively shorten the construction cycle, eliminate the need for maintenance, and improve construction efficiency; the steel pipes can be recycled and reused, generating no construction waste, and the steel pipes are easy to transport; in addition, by setting the back wall back plate 2 in the rear pipe row 11 to provide reaction force for the pipe jacking structure 100, the overall structural strength can be improved.

[0040] Optionally, the back wall back panel 2 and the rear pipe row 11 are detachably connected to facilitate the assembly and disassembly of the back wall back panel 2. That is, after the pipe jacking operation is completed, the back wall back panel 2 can be disassembled to facilitate the recycling and reuse of the overall support frame 1.

[0041] Specifically, such as Figure 2 As shown, four right-angle plates 111 are provided on the outer circumferential surface of the steel pipes of the rear pipe row 11. The four right-angle plates 111 can be arranged in pairs on two steel pipes distributed along the depth direction of the working well in the rear pipe row 11. The inner angles of the four right-angle plates 111 are all distributed facing each other and form an installation space. The rear back wall panel 2 can be detachably embedded in the installation space. The installation of the rear back wall panel 2 is achieved by setting four right-angle plates 111, which makes the installation and disassembly of the rear back wall panel 2 convenient.

[0042] In this embodiment, the back wall panel 2 can be configured in two specifications according to actual needs. Different specifications of back wall panels 2 can be accommodated by changing the spacing of the four right-angle plates 111. One back wall panel 2 has a specification of 800mm × 800mm × 6mm, suitable for push-pull pipes 102 with an outer diameter of 500mm-700mm; the other back wall panel 2 has a specification of 500mm × 500mm × 6mm, suitable for push-pull pipes 102 with an outer diameter of 200mm-500mm.

[0043] To further improve the installation stability of the rear wall back panel 2 and prevent it from falling off, optionally, at least one right-angle plate 111 is provided with a first threaded hole, and a limit screw 112 is screwed into the first threaded hole. The limit screw 112 can abut against the side of the rear wall back panel 2 away from the rear tube row 11, that is, the limit screw 112 can effectively prevent the rear wall back panel 2 from falling off, making the structure more stable.

[0044] In this embodiment, each of the four right-angle plates 111 is provided with a first threaded hole, and a limit screw 112 is screwed into each first threaded hole. The four limit screws 112 simultaneously abut against the side of the back wall back plate 2 away from the rear tube row 11, further improving the installation stability of the back wall back plate 2.

[0045] Optionally, such as Figures 2-4 As shown, the wellbore support structure for pipe jacking operations also includes flange anchors 3. The pipe jacking machine 101 flexibly abuts against the back wall plate 2 via the flange anchors 3, and the flange anchors 3 can be adjusted in size according to the outer diameter of the pipe jacking machine 101. By flexibly abutting against the back wall plate 2 via the flange anchors 3, the flange anchors 3 can absorb the vibration of the pipe jacking machine 101 during operation, thereby improving the installation stability of the pipe jacking machine 101 and reducing the probability of the pipe jacking machine 101 shifting position. Furthermore, the flange anchors 3 can be adjusted according to the outer diameter of the pipe jacking machine 101, so that the flange anchors 3 can be used for various specifications of pipe jacking machines 101.

[0046] Specifically, the flange anchor 3 includes four anchor plates 31 and four anchor fasteners 32. The anchor plates 31 can abut against the back wall back plate 2, and a flexible pad 33 (material can be fluororubber, thickness can be set to 3mm) is provided on the side of the anchor plate 31 facing the back wall back plate 2. The flexible pad 33 can absorb the vibration of the pipe jacking machine 101 during operation, and when the flexible pad 33 abuts against the back wall, the friction between the flexible pad 33 and the back wall back plate 2 is greater than the friction between metals, thereby reducing the positional displacement of the pipe jacking machine 101. Each anchor plate 31 is provided with two connecting blocks 311. The jacking machine 101 is provided with connection holes. The four anchoring plates 31 are distributed in a 2x2 matrix. An anchoring fastener 32 is inserted into the connection holes of the two connecting blocks 311 opposite each other on any two adjacent anchoring plates 31. When the anchoring fastener 32 is tightened, it can bring the corresponding two anchoring plates 31 closer to each other. That is, when all four anchoring fasteners 32 are tightened at the same time, the four anchoring plates 31 can move closer to each other towards the center. The jacking machine 101 can be clamped between the eight connecting blocks 311. This structure achieves the four anchoring plates 31 moving closer to each other or further away from each other by tightening or loosening the anchoring fasteners 32, thereby achieving the clamping or releasing of the jacking machine 101. The installation is simple and convenient.

[0047] Optionally, the anchoring fastener 32 can be an anchoring screw, wherein one of the connecting holes on the two connecting blocks 311 on each anchoring plate 31 is a through hole and the other is a second threaded hole. The anchoring screw can be inserted through the through holes on the two adjacent anchoring plates 31 opposite to the two connecting blocks 311 and screwed into the second threaded hole; or the anchoring fastener 32 can be an anchoring bolt, wherein the connecting holes on the two connecting blocks 311 on each anchoring plate 31 are both through holes. The anchoring bolt is inserted through the through holes on the two adjacent anchoring plates 31 opposite to the two connecting blocks 311 and screwed onto the anchoring bolt by an anchoring nut to achieve fastening.

[0048] Optionally, triangular plates 4 are welded between any two opposite steel pipes in the rear pipe row 11 and the side pipe row 13, and between any two opposite steel pipes in the front pipe row 12 and the side pipe row 13. By welding triangular plates 4 between any two opposite steel pipes, the structural stability of the support frame 1 can be improved.

[0049] Optionally, sealing plates are welded to both ends of the steel pipe. By sealing both ends of the steel pipe with the sealing plates, mud and sand can be effectively prevented from entering the inside of the steel pipe.

[0050] Optionally, refer to Figure 1 As shown, along the left and right direction of the working well, the front pipe row 12 is welded with reinforcing pipes 122 on both sides of the through opening 121. By setting the reinforcing pipes 122, the deformation resistance of the front pipe row 12 at the through opening 121 can be enhanced.

[0051] In this embodiment, the dimension of the through opening 121 along the depth direction of the working well is larger than the outer diameter of the jacking pipe 102, and the difference between the two is between 50mm and 100mm; the dimension between the two reinforcing pipes 122 (i.e., the distance between the nearest tangents of the two reinforcing pipes 122) is larger than the outer diameter of the jacking pipe 102, and the difference between the two is between 50mm and 100mm. The above dimensions are designed according to the outer diameter of the jacking pipe 102 to ensure that the jacking pipe 102 can be pushed in without interfering with the through opening 121, and the structural design is more reasonable.

[0052] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0053] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A wellbore support structure for pipe jacking operations, characterized in that, The well wall support structure for pipe jacking operations, installed inside the working well and used to support the surrounding area of ​​the working well, includes: The support frame (1) includes a rear pipe row (11), a front pipe row (12), and two side pipe rows (13). The rear pipe row (11) and the front pipe row (12) are spaced apart along the front-rear direction of the working well and respectively attached to the rear inner wall and the front inner wall of the working well. The two side pipe rows (13) are spaced apart along the left-right direction of the working well and respectively attached to the two side inner walls of the working well. The two ends of the side pipe rows (13) along the front-rear direction of the working well are respectively welded to the rear pipe row (11) and the front pipe row (12). The front pipe row (12) is provided with a through opening (121) for the jacking structure (100) to pass through. The rear pipe row (11), the front pipe row (12), and the side pipe rows (13) all include multiple steel pipes stacked and welded together along the depth direction of the working well. The back wall back panel (2) is located on the rear pipe row (11) at a position corresponding to the through opening (121), and the jacking pipe structure (100) can abut against the back wall back panel (2).

2. The wellbore support structure for pipe jacking operations according to claim 1, characterized in that, The rear back wall panel (2) is detachably connected to the rear pipe row (11).

3. The wellbore support structure for pipe jacking operations according to claim 2, characterized in that, The outer circumferential surface of the steel pipe in the rear pipe row (11) is provided with four right-angle plates (111), the inner angles of the four right-angle plates (111) are distributed facing each other and form an installation space, and the back wall back plate (2) is detachably embedded in the installation space.

4. The wellbore support structure for pipe jacking operations according to claim 3, characterized in that, At least one of the right-angle plates (111) is provided with a first threaded hole, and a limiting screw (112) is screwed into the first threaded hole. The limiting screw (112) can abut against the side of the back wall back plate (2) away from the rear tube row (11).

5. The wellbore support structure for pipe jacking operations according to claim 1, characterized in that, It also includes a flange anchor (3) disposed at the end of the jacking pipe structure (100), the jacking pipe structure (100) is flexibly abutted against the back wall back plate (2) through the flange anchor (3), and the flange anchor (3) can be adjusted in size according to the outer diameter of the jacking pipe structure (100).

6. The wellbore support structure for pipe jacking operations according to claim 5, characterized in that, The flange anchor (3) includes four anchor plates (31) and four anchor fasteners (32). The anchor plates (31) can abut against the back wall back plate (2), and a flexible pad (33) is provided on the side of the anchor plate (31) that abuts against the back wall back plate (2). Each anchor plate (31) is provided with two connecting blocks (311), and the connecting blocks (311) are provided with connecting holes. The four anchor plates (31) are distributed in a 2x2 matrix, and the connecting holes of the two connecting blocks (311) distributed opposite each other on any two adjacent anchor plates (31) are each provided with an anchor fastener (32). When the anchor fasteners (32) are tightened, they can bring the corresponding two anchor plates (31) closer to each other, so that the jacking pipe structure (100) is clamped between the eight connecting blocks (311).

7. The wellbore support structure for pipe jacking operations according to any one of claims 1-6, characterized in that, Triangular plates (4) are welded between any two opposite steel pipes in the rear pipe row (11) and the side pipe row (13), and between any two opposite steel pipes in the front pipe row (12) and the side pipe row (13).

8. The wellbore support structure for pipe jacking operations according to any one of claims 1-6, characterized in that, Both ends of the steel pipe are welded with sealing plates.

9. The wellbore support structure for pipe jacking operations according to any one of claims 1-6, characterized in that, Along the left-right direction of the working well, the front pipe row (12) is welded with reinforcing pipes (122) on both sides of the through opening (121).

10. The wellbore support structure for pipe jacking operations according to claim 9, characterized in that, The jacking structure (100) includes a jacking machine (101) and a plurality of jacking pipes (102). The back of the jacking machine (101) abuts against the back wall back plate (2), and the jacking pipes (102) pass through the through opening (121). The dimension of the through opening (121) along the depth direction of the working well is greater than the outer diameter of the jacking pipe (102), and the difference between the two is between 50mm and 100mm. The dimension between the two reinforcing tubes (122) is greater than the outer diameter of the push tube (102), and the difference between the two is between 50mm and 100mm.

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