Method for controlling planting head and sedimentation through large-diameter pipe jacking in soft soil layer

Abstract

The invention provides a method for controlling planting and sedimentation of a large-diameter pipe jacking for a soft soil stratum.The method comprises the following steps that firstly, the number of pipe joints is determined, and the number of the used pipe joints is determined according to the condition of planting of a pipe jacking machine, the total weight of the pipe jacking machine and the weight of a single pipe joint; and 2, the pipe jacking machine is connected with the pipe joints. According to the method for controlling head planting and sedimentation through the large-diameter jacking pipe for the soft soil stratum, during use, a limiting ring is pushed by a fixing rod to move downwards, an arc-shaped block on the limiting ring and the limiting rod are matched with a ring base and a reinforcing ring, and the supporting force generated when a pipe joint is installed between the jacking pipes is increased through cooperation of the limiting ring and the reinforcing ring; and in addition, the arc-shaped blocks and the limiting blocks are matched with the ring seat, so that supporting transmission of multi-point power is achieved.

Description

Technical Field

[0001] The invention relates to the field of pipe jacking control equipment, in particular to a method for controlling the planting and settlement of a large-diameter pipe jacking in a soft soil layer. Background Art

[0002] Drainage trenches are the basic infrastructure of cities and are necessary conditions for ensuring the normal production and life of residents in the area. In order to improve and ensure the stability, safety and reliability of drainage, cities and towns have stepped up the construction of drainage networks. Under complex geological conditions, large-diameter pipes generally use ordinary jacking construction technology. During the jacking construction process, the jacking machine is easily affected by the geological conditions and the phenomenon of head drop may occur.

[0003] According to a method for preventing muddy water pipe jacking machine from sinking during construction disclosed in the patent document with the existing publication number CN115163917A, the method includes a fixed steel plate, one side of the fixed steel plate is provided with installation holes for expansion bolts, and the other side has no reserved bolt holes, the size of the holes is the same as the specification size of the expansion bolts, both ends of the connecting steel plate are provided with installation holes for expansion bolts, the spacing is the same, and the size is the same as the holes on the fixed steel plate, the lap length of the full-thread bolts and the fixed steel plate should be the same as the spacing between the holes of the expansion bolts, and the diameter of the full-thread bolts is not less than the aperture of the expansion bolt holes. When used, this technical scheme can effectively connect the pipe jacking machine with the pipe section and the remaining front pipe sections to form a whole, play a role in connecting and pulling the jacking pipe and the pipe section, and the installation work is efficient. With respect to the above technical scheme, although this scheme improves the installation efficiency, it is impossible to perform multiple support fixation between the pipe jacking machine and the pipe section during use, which is inconvenient during use. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a method for controlling the planting and settlement of large-diameter jacking pipes in soft soil layers, so as to solve the problems raised in the above-mentioned background technology. The present invention has a novel structure. When in use, the limit ring moves downward under the push of the fixed rod, and the arc block and the limit rod on the limit ring cooperate with the ring seat and the reinforcement ring. The limit ring and the reinforcement ring cooperate to increase the supporting force of the pipe section installed between the jacking pipes, thereby avoiding deformation between the jacking pipe and the pipe section due to force. In addition, the arc block and the limit block cooperate with the ring seat to realize multi-point power support transmission.

[0005] In order to achieve the above object, the present invention is implemented by the following technical scheme: a method for controlling the head and settlement of a large-diameter jacking pipe in a soft soil layer, comprising the following steps:

[0006] Step 1: Determine the number of pipe sections. According to the situation of the pipe jacking machine head, the total weight of the pipe jacking machine and the weight of a single pipe section, determine the number of pipe sections to be used.

[0007] Step 2: Connect the pipe jacking machine to the pipe joint;

[0008] Step 3: Fix and install the pipe segments. After the first pipe segment is connected to the top pipe, the pipe segments are fixed by a tie reinforcement device. After the fixing plate and the support plate are installed, they are fixed by expansion bolts.

[0009] Step 4: Observe the head-drilling condition of the pipe jacking machine;

[0010] Step 5: grouting;

[0011] Step 6: Seal.

[0012] Furthermore, in the step 2, connection positions symmetrical about the central axis are selected on the pipe jacking machine and the pipe segments to be connected. In the step 4, the posture of the pipe jacking machine is observed. If the posture of the pipe jacking machine still has a head-diving phenomenon, the number of pipe segments and the number of tie-tie reinforcement devices on each pipe segment are further increased.

[0013] Furthermore, in the step five, slurry is injected into the interior of the borehole through the opening and the grouting hole, and after the grouting is completed in the step six, it is sealed by using micro-expansive cement stirred with chloroprene rubber.

[0014] Furthermore, the tie-and-reinforcement device in step three includes a jacking pipe, a drill bit is welded to one end of the jacking pipe, a fixed pipe is movably mounted to the other end of the jacking pipe, an injection hole is provided on the fixed pipe, an opening is provided on the jacking pipe, ring seats are welded to the inner walls of the jacking pipe and the fixed pipe, a reinforcement ring is fixed to the ring seat, the reinforcement ring has an opening, and a limiting groove is provided on the ring seat.

[0015] Furthermore, a fixed seat is welded between the ring seats, a support seat is movably mounted on the fixed seat, a limiting column is welded on the support seat, a connecting seat is movably mounted on one end of the support seat, a support rod is welded on the connecting seat, and one end of the support rod is hinged to the support seat through a fixed axis.

[0016] Furthermore, a threaded column is rotatably mounted on the fixed seat, a threaded seat is rotatably mounted on the threaded column, a rotating ring is rotatably mounted on the side of the threaded seat, a connecting shaft is fixed on the rotating ring, and the connecting shaft is fixedly mounted on one end of the connecting seat.

[0017] Furthermore, a fixing block is welded on the inner walls of the fixed pipe and the top pipe, a fixing groove is opened inside the fixing block, a fixing rod is movably installed inside the fixing groove, a limiting ring is welded at one end of the fixing rod, a sliding groove is opened on the inner wall of the fixing groove, a slider is movably installed inside the sliding groove, the slider is fixed on the fixing rod, and a supporting mechanism is fixedly installed between the slider and the sliding groove.

[0018] Furthermore, an arc block and a limit rod are welded to the bottom of the limit ring, one end of the limit rod is movably installed inside the limit groove, the arc block is movably installed inside the opening, a limit hole is opened on the arc block, and the limit hole cooperates with the limit column.

[0019] Furthermore, a protrusion is welded on the top of the fixing seat, a groove is formed on the bottom of the supporting seat, and the protrusion is movably installed inside the groove.

[0020] Furthermore, a fixing plate is fixedly mounted on the inner wall of the jacking tube, a screw rod is fixedly mounted on the fixing plate, a support plate is mounted on one end of the screw rod, and the support plate is fixedly mounted on the inner wall of the jacking tube and the fixing tube respectively by fixing bolts.

[0021] Beneficial effects of the present invention:

[0022] 1. A method for controlling the planting and settlement of large-diameter jacking pipes in soft soil. When in use, the limit ring moves downward under the push of the fixed rod, and the arc block and the limit rod on the limit ring cooperate with the ring seat and the reinforcement ring. The limit ring and the reinforcement ring cooperate to increase the supporting force of the pipe section installed between the jacking pipes, avoiding deformation between the jacking pipe and the pipe section due to force. In addition, the arc block and the limit block cooperate with the ring seat to realize multi-point power support transmission.

[0023] 2. A method for controlling the head dive and settlement of large-diameter jacking pipes in soft soil layers, wherein the ring seat and the fixed seat cooperate to provide linear support for the inner walls of the jacking pipe and the fixed pipe, and at a later stage, the limit column enters into the limit hole under the push of the threaded column, and the limit column is fixed up and down by the arc block and the limit ring, and the opening cooperates with the arc block to limit the left and right. In addition, the fixed plate and the support plate are staggered and cross-distributed with the arc block and the opening left and right, and the fixing force between the fixed pipe and the jacking pipe is provided again through the connection of the fixed plate and the support plate through the screw rod, thereby effectively avoiding the occurrence of the head dive phenomenon. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the steps of a method for controlling the head and settlement of a large-diameter jacking pipe in soft soil according to the present invention;

[0025] Figure 2 It is a three-dimensional structural schematic diagram of a tie-and-reinforcement device for a method for controlling the head and settlement of a large-diameter jacking pipe in a soft soil layer according to the present invention;

[0026] Figure 3 A schematic diagram of the structure inside a jacking pipe of a method for controlling the head and settlement of a large-diameter jacking pipe in soft soil according to the present invention;

[0027] Figure 4This is a structural schematic diagram of point A enlarged in a method for controlling the head and settlement of a large-diameter jacking pipe in soft soil according to the present invention;

[0028] Figure 5 It is a schematic diagram of the side cross-sectional structure of a jacking pipe and a fixed pipe in a method for controlling the planting and settlement of a large-diameter jacking pipe in soft soil layer according to the present invention;

[0029] Figure 6 It is a structural schematic diagram of a method for controlling the planting and settlement of a large-diameter jacking pipe in soft soil layer according to the present invention, after the jacking pipe and the fixed pipe are installed in multiple sections;

[0030] Figure 7 It is a structural schematic diagram of point B of a method for controlling the planting and settlement of a large-diameter jacking pipe in soft soil layer according to the present invention after enlargement;

[0031] Figure 8 It is a structural schematic diagram of point C of the method for controlling the head and settlement of a large-diameter jacking pipe in soft soil layer according to the present invention after enlargement;

[0032] In the figure: 1. jacking pipe; 2. drill bit; 3. fixing pipe; 4. opening; 5. injection hole; 6. ring seat; 7. reinforcement ring; 8. opening; 9. limiting groove; 10. limiting column; 11. supporting seat; 12. fixing seat; 13. connecting seat; 14. supporting rod; 15. fixing shaft; 16. rotating ring; 17. threaded seat; 18. connecting shaft; 19. threaded column; 20. fixing block; 21. fixing rod; 22. slide groove; 23. slider; 24. supporting mechanism; 25. limiting ring; 26. arc block; 27. limiting rod; 28. limiting hole; 29. ​​groove; 30. protrusion; 31. fixing plate; 32. screw rod; 33. supporting plate; 34. fixing bolt. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0034] See also Figures 1 to 8 The present invention provides a technical solution: a method for controlling the head and settlement of a large-diameter jacking pipe in a soft soil layer, including the following steps:

[0035] Step 1: Determine the number of pipe sections. According to the situation of the pipe jacking machine head, the total weight of the pipe jacking machine and the weight of a single pipe section, determine the number of pipe sections to be used.

[0036] Step 2: Connect the pipe jacking machine to the pipe joint;

[0037] Step 3: Fix and install the pipe segments. After the first pipe segment is connected to the top pipe, the pipe segments are fixed by a tie reinforcement device. After the fixing plate and the support plate are installed, they are fixed by expansion bolts.

[0038] Step 4: Observe the head-drilling condition of the pipe jacking machine;

[0039] Step 5: grouting;

[0040] Step 6: Seal.

[0041] Among them, in step 2 of the present invention, connection positions symmetrical about the central axis are selected on the pipe jacking machine and the pipe segments to be connected, in step 4, the posture of the pipe jacking machine is observed, and if the posture of the pipe jacking machine still has a head-diving phenomenon, the number of pipe segments and the number of tie reinforcement devices on each pipe segment are continued to be increased, in step 5, slurry is injected into the interior of the borehole through opening holes and grouting holes, and after the grouting is completed in step 6, it is sealed by using micro-expansive cement stirred with chloroprene rubber.

[0042] Specifically, the tie-and-reinforcement device in step three of the present invention includes a jacking pipe 1, a drill bit 2 is welded to one end of the jacking pipe 1, a fixed pipe 3 is movably installed at the other end of the jacking pipe 1, a liquid injection hole 5 is opened on the fixed pipe 3, and an opening 4 is opened on the jacking pipe 1. Ring seats 6 are welded on the inner walls of the jacking pipe 1 and the fixed pipe 3, a reinforcement ring 7 is fixed on the ring seat 6, an opening 8 is opened on the reinforcement ring 7, and a limiting groove 9 is opened on the ring seat 6.

[0043] In this embodiment, a fixed seat 12 is welded between the ring seats 6, a support seat 11 is movably mounted on the fixed seat 12, a limited column 10 is welded on the support seat 11, a connecting seat 13 is movably mounted on one end of the support seat 11, a support rod 14 is welded on the connecting seat 13, one end of the support rod 14 is hinged to the support seat 11 through a fixed shaft 15, a threaded column 19 is rotatably mounted on the fixed seat 12, a threaded seat 17 is rotatably mounted on the threaded column 19, a rotating ring 16 is rotatably mounted on the side of the threaded seat 17, and a fixed rotating ring 16 is fixed on the rotating ring 16. A connecting shaft 18 is provided, and the connecting shaft 18 is fixedly installed at one end of the connecting seat 13. The threaded seat 17 rotates and moves up and down on the threaded column 19. When the threaded seat 17 rotates on the threaded column 19, the rotating ring 16 remains stationary. Later, the rotating ring 16 rises and falls with the rise and fall of the threaded seat 17. When the rotating ring 16 rises and falls, it drives the connecting seat 13 to tilt through the connecting shaft 18. After the connecting seat 13 tilts, it drives the limiting column 10 to be pulled out from the inside of the opening 8 and the limiting groove 9. After being pulled out, it provides a support locking point between the later jacking pipe 1 and the fixed pipe 3.

[0044] A fixing block 20 is welded on the inner walls of the fixing pipe 3 and the top pipe 1, a fixing groove is opened inside the fixing block 20, a fixing rod 21 is movably installed inside the fixing groove, a limiting ring 25 is welded at one end of the fixing rod 21, a slide groove 22 is opened on the inner wall of the fixing groove, a slider 23 is movably installed inside the slide groove 22, the slider 23 is fixed on the fixing rod 21, a supporting mechanism 24 is fixedly installed between the slider 23 and the slide groove 22, the supporting mechanism 24 is a supporting spring, and the fixing rod 21 is always moved downward under the push of the supporting spring.

[0045] In this embodiment, an arc block 26 and a limit rod 27 are welded to the bottom of the limit ring 25, one end of the limit rod 27 is movably mounted inside the limit groove 9, the arc block 26 is movably mounted inside the opening 8, a limit hole 28 is opened on the arc block 26, the limit hole 28 matches the limit column 10, the limit hole 28 and the limit column 10 are both circular, and the cylindrical limit column 10 is movably inserted into the opposite limit hole 10 to complete the fixed connection at both ends, thereby realizing the quick connection between the top pipe 1 and the fixed pipe 3, and a convex block 30 is welded on the top of the fixing seat 12. A groove 29 is formed at the bottom of the support seat 11, and a protrusion 30 is movably installed inside the groove 29. A fixing plate 31 is fixedly installed on the inner wall of the top pipe 1, and a screw rod 32 is fixedly installed on the fixing plate 31. A support plate 33 is installed at one end of the screw rod 32. The support plate 33 is fixedly installed on the inner walls of the top pipe 1 and the fixed pipe 3 respectively through fixing bolts 34. The screw rod 32 is inserted into the fixing plate 31. The screw rod 32 and the fixing plate 31 are arranged opposite to each other. The screw rod 32 and the fixing plate 31 are inserted and connected to provide an external fixing point between the top pipe 1 and the fixed pipe 3.

[0046] When the device is in use, the number of pipe sections to be used is determined according to the situation of the pipe jacking machine head, the total weight of the pipe jacking machine and the weight of a single pipe section, and a connection position symmetrical about the central axis is selected on the pipe jacking machine and the pipe section to be connected. After the connection position is determined, the jacking pipe 1 and the fixed pipe 3 are installed. When the fixed pipe 3 is installed on the jacking pipe, one end of the fixed pipe 3 contacts one end of the jacking pipe 1. After the contact, the arc block 26 may be misaligned with the opening 8. The fixed pipe 3 is rotated on the jacking pipe 1 by rotating the fixed pipe 3. When one end of the arc block 26 enters the top of the opening 8, the limit ring 25 is moved downward under the push of the support mechanism 24. After the limit ring 25 moves downward, the arc block 26 enters into the interior of the opening 8, and the limit rod 27 enters into the interior of the limit groove 9. Then, a tool is used to rotate the threaded column 19 from the top of the fixed pipe 3, and the thread The column 19 rotates to push the threaded seat 17 and the rotating ring 16 to move downward. When the rotating ring 16 moves downward, it pushes the connecting plate 13 to move sideways. The displacement causes the support rod 14 to push the support seat 11 to move on the fixed seat 12. The support seat 11 moves sideways to allow the limiting column 10 to enter the limiting hole 28 of the arc block 26. The limiting column 10 cooperates with the limiting hole 28 to achieve the up, down, left and right limiting of the arc block 26, thereby providing fixed support between the fixed pipe 3 and the jacking pipe 1. After the installation of the limiting column 10 is completed, the fixing plate 31 and the support plate 33 between the fixed pipe 3 and the jacking pipe 1 are supported and fixed at two points again through the screw rod 32. The screw rod 32 and the arc block 26 cooperate to provide four-point support and fixation for the jacking pipe 1 and the fixed pipe 3 as a whole, effectively ensuring the stability between the fixed pipe 3 and the jacking pipe 1, and avoiding the phenomenon of the jacking machine 1 falling during construction.

[0047] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0048] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A method for controlling the head and settlement of a large-diameter jacking pipe in a soft soil layer, comprising: The method comprises the following steps: Step 1: Determine the number of pipe sections. According to the situation of the pipe jacking machine head, the total weight of the pipe jacking machine and the weight of a single pipe section, determine the number of pipe sections to be used. Step 2: Connect the pipe jacking machine to the pipe joint; Step 3: Fix and install the pipe segments. After the first pipe segment is connected to the top pipe, the pipe segments are fixed by a tie reinforcement device. After the fixing plate and the support plate are installed, they are fixed by expansion bolts. Step 4: Observe the head-drilling condition of the pipe jacking machine; Step 5: Grouting; Step 6: Blocking; The tie-reinforcement device in step 3 comprises a jacking pipe, a drill bit is welded to one end of the jacking pipe, a fixed pipe is movably mounted to the other end of the jacking pipe, a liquid injection hole is provided on the fixed pipe, an opening is provided on the jacking pipe, a ring seat is welded to the inner wall of the jacking pipe and the fixed pipe, a reinforcement ring is fixed to the ring seat, an opening is provided on the reinforcement ring, and a limiting groove is provided on the ring seat; A fixing seat is welded between the ring seats, a supporting seat is movably mounted on the fixing seat, a limiting column is welded on the supporting seat, a connecting seat is movably mounted on one end of the supporting seat, a supporting rod is welded on the connecting seat, and one end of the supporting rod is hinged to the supporting seat through a fixed shaft.

2. A method for controlling the sinking and settlement of a large-diameter pipe jacking in soft soil according to claim 1, characterized in that: In the step 2, a connection position symmetrical about the central axis is selected on the pipe jacking machine and the pipe segment to be connected. In the step 4, the posture of the pipe jacking machine is observed. If the posture of the pipe jacking machine still has a head-diving phenomenon, the number of pipe segments and the number of tie-tie reinforcement devices on each pipe segment are continued to be increased.

3. A method for controlling the sinking and settlement of a large-diameter pipe jacking in soft soil according to claim 1, characterized in that: In the step 5, slurry is injected into the interior of the borehole through the opening and the grouting hole. After the grouting is completed in the step 6, the micro-expansive cement stirred with chloroprene rubber is used for sealing.

4. A method for controlling the sinking and settlement of a large diameter pipe jacking in soft soil according to claim 1, characterized in that: A threaded column is rotatably mounted on the fixing seat, a threaded seat is rotatably mounted on the threaded column, a rotating ring is rotatably mounted on the side of the threaded seat, a connecting shaft is fixed on the rotating ring, and the connecting shaft is fixedly mounted on one end of the connecting seat.

5. The method for controlling the sinking and settlement of a large-diameter pipe jacking in soft soil according to claim 1, characterized in that: A fixing block is welded on the inner walls of the fixing pipe and the top pipe, a fixing groove is opened inside the fixing block, a fixing rod is movably installed inside the fixing groove, a limiting ring is welded at one end of the fixing rod, a sliding groove is opened on the inner wall of the fixing groove, a slider is movably installed inside the sliding groove, the slider is fixed on the fixing rod, and a supporting mechanism is fixedly installed between the slider and the sliding groove.

6. A method for controlling the sinking and settlement of a large diameter pipe jacking in soft soil according to claim 5, characterized in that: An arc block and a limiting rod are welded to the bottom of the limiting ring, one end of the limiting rod is movably installed inside the limiting groove, the arc block is movably installed inside the opening, a limiting hole is opened on the arc block, and the limiting hole cooperates with the limiting column.

7. A method for controlling the sinking and settlement of a large diameter pipe jacking in soft soil according to claim 1, characterized in that: A convex block is welded on the top of the fixing seat, a groove is formed on the bottom of the supporting seat, and the convex block is movably installed inside the groove.

8. The method for controlling the sinking and settlement of a large diameter pipe jacking in soft soil according to claim 1, characterized in that: A fixing plate is fixedly mounted on the inner wall of the jacking pipe, a screw rod is fixedly mounted on the fixing plate, a support plate is mounted on one end of the screw rod, and the support plate is fixedly mounted on the inner wall of the jacking pipe and the fixing pipe respectively through fixing bolts.

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