Corrugated pipe bundle penetrating device and method suitable for concrete pipe joints constructed through pipe roofing method

Abstract

The invention belongs to the technical field of pipe roofing construction, and discloses a corrugated pipe bundle penetrating device and method suitable for concrete pipe joints constructed through a pipe roofing method. Holes in the same position in the whole row of concrete pipe joints form a bundle penetrating channel for a corrugated pipe to penetrate through; the corrugated pipe bundle penetrating device comprises a traction rod and a plurality of connecting rods, wherein the traction rod is inserted from the inlet end of the bundle penetrating channel and penetrates out of the outlet end of the bundle penetrating channel; the pull rope is used for pulling the corrugated pipe to be inserted into the strand penetrating channel when the traction rod penetrates through the strand penetrating channel; and the guide assembly is used for restraining the traction rod to penetrate through the strand penetrating channel along a straight line and comprises a plurality of groups of wedge-shaped rubber rings which are arranged in the strand penetrating channel at intervals. According to the invention, the wedge-shaped rubber ring is arranged, so that the guiding and calibration effects can be achieved; the construction cost can be greatly reduced, the influence on the construction period is small, the influence on the strand pulling work caused by deviation in the construction process is effectively avoided, and the construction adaptability is better.

Description

Technical Field

[0001] The invention belongs to the technical field of pipe curtain construction, and in particular relates to a corrugated pipe bundle threading device and method suitable for concrete pipe segments constructed by a pipe curtain method. Background Art

[0002] Shield or mining methods are often used for excavation of new projects under existing structures. Shield crossing often has problems such as deep buried line, high cost and risk; mining crossing often has problems such as high construction risk, large reinforcement volume, slow construction speed, and large disturbance to the existing upper structure. Therefore, an underground dark excavation technology - pipe curtain method was born. It is a construction method of building large-section underground space with small-diameter pipe jacking machine on the basis of pipe jacking method. The bundled pipe curtain method has the following advantages: no deepening is required during node line design, and the pipe curtain can be constructed close to the existing structure bottom plate; it has strong operability, is independent of stratum conditions, and can be constructed in any stratum; the soil inside the pipe curtain can be excavated in a single bin at one time, which greatly increases the construction speed.

[0003] The current pipe curtain method basically adopts a structural form of steel pipe segments, and concrete is filled in and between the pipe segments; however, the steel pipe segments are expensive, the construction cost is greatly increased, and there is a problem of loose concrete pouring when filling the steel pipe segments with concrete; therefore, prefabricated concrete pipe segments are used to avoid the problems of high construction cost and loose pouring; for example, Chinese patent CN114060042 A disclosed a bundled structure of a concrete pipe segment and a construction method thereof, in which through holes are reserved inside the concrete pipe segment body for tensioning prestressed steel strands after the concrete pipe segments are spliced ​​side by side in the later stage; in the prior art, a corrugated tube needs to be inserted before inserting the prestressed steel strand, and then the prestressed steel strand is inserted into the corrugated tube; due to the weak rigidity of the corrugated tube, it is difficult to construct it when it is inserted into the holes on the concrete pipe segments spliced ​​side by side, and during the construction process, any slight deviation of adjacent concrete pipe segments will cause the holes to be uneven, making it difficult for the inserted corrugated tube to be inserted into adjacent holes, thereby making it difficult to insert the prestressed steel strand; therefore, we propose a corrugated tube bundled device and method for concrete pipe segments suitable for pipe curtain method construction to solve the above problems. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a corrugated pipe bundle threading device and method suitable for concrete pipe segments constructed by pipe curtain method, which solves the problem of difficulty in threading prestressed steel strands.

[0005] The present invention is realized by the following scheme: a corrugated pipe bundle threading device suitable for concrete pipe segments constructed by pipe curtain method, holes located at the same position on a whole row of concrete pipe segments form a bundle threading channel for the corrugated pipe to be threaded, and the corrugated pipe bundle threading device comprises:

[0006] A traction rod used to be inserted from the inlet end of the beam-threading channel and pass through the outlet end, wherein the head end of the traction rod is formed into an elliptical head or a round head;

[0007] A pull rope used to pull the corrugated tube into the bundle passing channel when the pull rod passes through the bundle passing channel, the pull rope being connected to the tail end of the pull rod and the head end of the corrugated tube;

[0008] A guide assembly is used to constrain the traction rod to pass through the beam passage in a straight line. The guide assembly includes a plurality of groups of wedge-shaped rubber rings arranged at intervals in the beam passage, and the large-diameter end surface of each group of wedge-shaped rubber rings faces the inlet end.

[0009] The further improvement of the corrugated pipe bundle threading device for concrete pipe sections used in pipe curtain method construction of the present invention is that the traction rod comprises a head end steel pipe, a tail end steel pipe and an intermediate steel pipe group, the elliptical head or round head is formed at the head end of the head end steel pipe, the head end steel pipe is detachably connected to the intermediate steel pipe group, and the intermediate steel pipe group is detachably connected to the tail end steel pipe;

[0010] The head end steel pipe, the middle steel pipe group and the tail end steel pipe are connected and fixed to form the traction rod, and the projection of the traction rod is a straight line.

[0011] The further improvement of the corrugated pipe bundle threading device of the concrete pipe section suitable for pipe curtain method construction of the present invention lies in that the head end steel pipe is threadedly connected with the middle steel pipe group, and the middle steel pipe group is threadedly connected with the tail end steel pipe.

[0012] A further improvement of the corrugated pipe bundle threading device of the concrete pipe section suitable for pipe curtain method construction of the present invention is that the intermediate steel pipe group includes a plurality of intermediate steel pipes, and adjacent intermediate steel pipes are threadedly connected.

[0013] A further improvement of the corrugated pipe bundle threading device for concrete pipe segments constructed by the pipe curtain method of the present invention is that each group of wedge-shaped rubber rings includes two wedge-shaped rubber rings, and the two wedge-shaped rubber rings are respectively arranged at the head end and the tail end of the hole on each concrete pipe segment.

[0014] A further improvement of the corrugated pipe bundle threading device for a concrete pipe segment constructed by the pipe curtain method of the present invention lies in that the small-diameter end of the wedge-shaped rubber ring is matched with the corrugated pipe.

[0015] A further improvement of the corrugated pipe bundle threading device of the concrete pipe section suitable for pipe curtain method construction of the present invention is that the traction rod has rigidity to ensure that the wedge-shaped rubber ring does not deform when being squeezed.

[0016] A method for threading a corrugated pipe bundle of a concrete pipe segment suitable for pipe curtain method construction comprises the following steps:

[0017] Step 1: before pushing the concrete pipe segment into the soil layer, provide a plurality of groups of wedge-shaped rubber rings, and arrange the plurality of groups of wedge-shaped rubber rings at intervals in a bundle-penetrating channel formed by holes at the same position on the entire row of concrete pipe segments, and the large-diameter end surface of each group of the wedge-shaped rubber rings faces the inlet end of the bundle-penetrating channel;

[0018] Step 2: After the working warehouse pipe section and the concrete pipe section are pushed into the soil layer side by side, a traction rod and a pull rope are provided, and the tail end of the traction rod is connected and fixed to the corrugated pipe through the pull rope;

[0019] Step 3: Push the traction rod into the beam threading channel in the working warehouse pipe section, so that the traction rod passes through several groups of wedge-shaped rubber rings until it passes through the beam threading channel, thereby pulling the corrugated tube forward through the pull rope and passing through the beam threading channel.

[0020] The present invention is suitable for the further improvement of the corrugated pipe bundle threading method of the concrete pipe section of the pipe curtain method construction in that the traction rod comprises a head end steel pipe, a tail end steel pipe and an intermediate steel pipe group, and the elliptical head or round head is formed at the head end of the head end steel pipe;

[0021] Before implementing step 3, a draw rope is connected and fixed between the tail end steel pipe and the corrugated pipe; step 3 specifically includes the following steps:

[0022] Insert the first end steel pipe into the bundle passage, and then thread it into the middle steel pipe group;

[0023] Push the middle steel pipe group to push the first end steel pipe forward, so that the first end steel pipe passes through a plurality of groups of wedge-shaped rubber rings;

[0024] Continue pushing until the first end steel pipe passes through the bundle passage, and the tail end steel pipe is threadedly connected to the tail end of the middle steel pipe group;

[0025] Remove the head end steel pipe, then pull the middle steel pipe group out of the bundle passing channel, during which the corrugated tube will be gradually inserted into the bundle passing channel by pulling the pull rope; remove the middle steel pipe group, then pull the tail end steel pipe out of the bundle passing channel, and then pull the corrugated tube completely into the bundle passing channel by pulling the pull rope.

[0026] The further improvement of the corrugated pipe bundle threading method for concrete pipe segments in pipe curtain method construction of the present invention is that the intermediate steel pipe group includes a plurality of intermediate steel pipes, and adjacent intermediate steel pipes are threadedly connected;

[0027] When the head end steel pipe, the middle steel pipe group and the tail end steel pipe are threadedly connected for splicing, firstly, an middle steel pipe is threadedly connected to the head end steel pipe, and then the middle steel pipe is pushed to push the head end steel pipe forward a certain distance in the bundle threading channel; then, a number of middle steel pipes are spliced ​​one by one at the tail end of the previous middle steel pipe in a front-to-back order, and each time an middle steel pipe is spliced, the middle steel pipe is pushed to push the head end steel pipe forward until the head end steel pipe is pushed out of the hole; then the tail end steel pipe is threadedly connected to the last middle steel pipe.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The present invention can prevent grease loss in the hole by installing wedge-shaped rubber rings at the head and tail ends of the hole on each concrete pipe section; by arranging a pull rope connected and fixed between the traction rod and the corrugated pipe, the traction rod can be pushed into the hole, and when the head end of the traction rod abuts against the wedge-shaped mouth of the wedge-shaped rubber ring, if there is a misalignment between adjacent concrete pipe sections, the traction rod will squeeze the wedge-shaped rubber ring, and the misalignment is adaptively adjusted by the squeezing and deformation of the wedge-shaped rubber ring, so that the traction rod can be kept in a straight line without bending and deformation, and further, the round head at the head end of the traction rod and the wedge-shaped mouth of the wedge-shaped rubber ring are matched to guide the traction rod, which is conducive to the rapid and smooth passage of the traction rod, so that the corrugated pipe 7 can be smoothly inserted into the hole, and finally the prestressed steel strand can be inserted into the corrugated pipe; this method can greatly reduce the construction cost, has little impact on the construction period, and effectively avoids the influence of deviations in the construction process on the bundle threading work, and has better construction adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 The schematic diagram of the present invention is that the first end steel pipe is pushed into the hole by splicing the middle steel pipe.

[0031] Figure 2 A schematic diagram showing the traction rod of the present invention being completely inserted into a hole is shown.

[0032] Figure 3 A schematic diagram of the round head passing through the wedge-shaped rubber ring of the present invention is shown.

[0033] Figure 4 A schematic diagram showing the connection and fixation of the tail end steel pipe of the present invention to the corrugated pipe through a draw rope is shown.

[0034] Figure 5 A schematic diagram showing the traction rod of the present invention pulling the corrugated tube into the hole through the pull rope is shown.

[0035] Figure 6 A schematic diagram showing the bellows of the present invention being completely inserted into a hole is shown.

[0036] In the figure: 1. traction rod; 101. head end steel pipe; 102. middle steel pipe; 103. tail end steel pipe; 104. round head; 2. wedge-shaped rubber ring; 3. concrete pipe section; 4. working warehouse pipe section; 5. hole; 6. pull rope; 7. corrugated pipe. DETAILED DESCRIPTION

[0037] In order to solve the problem of difficulty in threading prestressed steel strands, the present invention provides a corrugated pipe threading device and method for concrete pipe segments constructed by pipe curtain method. The following is a further description of the corrugated pipe threading device and method for concrete pipe segments constructed by pipe curtain method with specific embodiments and accompanying drawings.

[0038] See also Figure 1 to Figure 6 As shown, a corrugated pipe bundle threading device suitable for concrete pipe segments constructed by pipe curtain method comprises:

[0039] The holes 5 at the same position on the entire row of concrete pipe segments 3 form a bundle-passing channel for the corrugated pipe 7 to pass through. The corrugated pipe bundle-passing device includes:

[0040] A traction rod 1 for inserting from the inlet end of the beam-threading channel and passing through the outlet end, wherein the head end of the traction rod 1 is formed into a round head 104;

[0041] A pull rope 6 used to pull the corrugated tube 7 into the beam-threading passage when the traction rod 1 passes through the beam-threading passage, the pull rope 6 being connected to the tail end of the traction rod 1 and the head end of the corrugated tube 7;

[0042] The guide assembly is used to constrain the traction rod 1 to pass through the beam passage in a straight line. The guide assembly includes a plurality of groups of wedge-shaped rubber rings 2 arranged at intervals in the beam passage, and the large-diameter end surface of each group of wedge-shaped rubber rings 2 faces the entrance end.

[0043] By pushing the traction rod 1 to pass through the hole 5, when the head end of the traction rod 1 abuts against the wedge-shaped opening of the wedge-shaped rubber ring 2, since the head end of the traction rod 1 is set as a round head 104, the round head 104 will gradually slide along the wedge-shaped opening toward the center opening of the wedge-shaped rubber ring 2 and pass through the center opening, so that the traction rod 1 passes through the wedge-shaped rubber ring 2, which can play a guiding and calibration effect, and the traction rod 1 that has passed through can pull the corrugated tube 7 through the pull rope 6 to pass through the hole 5 and the wedge-shaped rubber ring 2, and finally the prestressed steel strand can be passed through the corrugated tube 7 for tensioning.

[0044] The traction rod 1 includes a head end steel pipe 101, a tail end steel pipe 103 and an intermediate steel pipe group. The round head 104 is formed at the head end of the head end steel pipe 101. The head end steel pipe 101 and the intermediate steel pipe group are detachably connected, and the intermediate steel pipe group and the tail end steel pipe 103 are detachably connected.

[0045] The head end steel pipe 101, the middle steel pipe group and the tail end steel pipe 103 are connected and fixed to form a traction rod 1, and the projection of the traction rod 1 is a straight line.

[0046] A straight traction rod 1 similar to a straight rod is spliced ​​together by the head end steel pipe 101, the tail end steel pipe 103 and the middle steel pipe group, and the diameter of the traction rod 1 is smaller than the diameter of the center opening of the wedge-shaped rubber ring 2. This makes it easier for the traction rod 1 to pass through the wedge-shaped rubber ring 2 when it is pushed into the hole 5, thereby pulling the corrugated tube 7 to penetrate.

[0047] The head end steel pipe 101 is threadedly connected to the middle steel pipe group, and the middle steel pipe group is threadedly connected to the tail end steel pipe 103 .

[0048] By adopting the threaded connection, the disassembly and assembly of the traction rod 1 during operation is facilitated, and the construction is convenient.

[0049] The intermediate steel pipe group includes a plurality of intermediate steel pipes 102 , and adjacent intermediate steel pipes 102 are threadedly connected.

[0050] By providing a plurality of intermediate steel pipes 102, the length of the formed traction rod 1 can be well adapted to the total length of the bundle-through passage formed after the holes 5 are assembled when a plurality of concrete pipe sections 3 are assembled, and the construction adaptability is good.

[0051] Each set of wedge-shaped rubber rings 2 includes two wedge-shaped rubber rings 2 , and the two wedge-shaped rubber rings 2 are respectively arranged at the head end and the tail end of the hole 5 on each concrete pipe section 3 .

[0052] By installing wedge-shaped rubber rings 2 at the head and tail ends of the hole 5 on each concrete pipe segment 3, the loss of grease in the hole 5 can be avoided; by setting the wedge-shaped rubber rings 2 at the head and tail ends of the hole 5 on each concrete pipe segment 3, when assembling each concrete pipe segment 3, even if there is a slight deviation, the wedge-shaped rubber rings 2 can guide and correct the inserted traction rod 1 at the splicing interface, which has a better effect and can make the traction rod 1 smoothly pass through the bundle passage.

[0053] The small-diameter end of the wedge-shaped rubber ring 2 is matched with the bellows 7 .

[0054] The wedge-shaped rubber ring 2 is closely matched with the inserted corrugated pipe 7 to achieve a blocking effect, so that when pouring concrete between adjacent concrete pipe sections 3 later, concrete can be prevented from entering the hole 5, making the pouring dense.

[0055] The traction rod 1 has rigidity to ensure that it does not deform when the wedge-shaped rubber ring 2 is squeezed.

[0056] The traction rod 1 is provided with a certain rigidity, so that when it penetrates into the bundle threading channel and abuts against the wedge-shaped rubber ring 2, if there is a misalignment between adjacent concrete pipe sections 3, the traction rod 1 will squeeze the wedge-shaped rubber ring 2, and the misalignment is adaptively adjusted by the squeezing and deformation of the wedge-shaped rubber ring 2, so that the traction rod 1 can be kept in a straight line without bending and deformation. Furthermore, the round head 104 at the head end of the traction rod 1 and the wedge-shaped mouth of the wedge-shaped rubber ring 2 are matched to guide the traction rod 1, which is conducive to the rapid and smooth passage of the traction rod 1, and then the corrugated tube 7 can be smoothly inserted into the bundle threading channel.

[0057] A method for threading a bundle of concrete pipe segments using a pipe curtain method, comprising the following steps:

[0058] Step 1: before pushing the concrete pipe segment 3 into the soil layer, provide a plurality of groups of wedge-shaped rubber rings 2, and arrange the plurality of groups of wedge-shaped rubber rings 2 at intervals in the bundle-penetrating channel formed by the holes 5 located at the same position on the entire row of concrete pipe segments 3, and the large-diameter end face of each group of wedge-shaped rubber rings 2 faces the entrance end of the bundle-penetrating channel;

[0059] Step 2: After the working warehouse pipe section 4 and the concrete pipe section 3 are pushed into the soil layer side by side, a tail end steel pipe 103 and a draw rope 6 are provided, and the tail end of the tail end steel pipe 103 is connected and fixed to the corrugated pipe 7 through the draw rope 6;

[0060] Step 3: Provide a first-end steel tube 101, and push the first-end steel tube 101 into the bundle threading channel, so that the round head 104 gradually moves along the wedge-shaped opening toward the center opening of the wedge-shaped rubber ring 2 to pass through the wedge-shaped rubber ring 2;

[0061] Step 4: Thread an intermediate steel tube 102 to the tail end of the head end steel tube 101, and then push the intermediate steel tube 102 to push the head end steel tube 101 forward in the bundle passing channel for a distance; then splice a number of intermediate steel tubes 102 one by one in a front-to-back order at the tail end of the previous intermediate steel tube 102, and push the intermediate steel tube 102 to push the head end steel tube 101 forward each time an intermediate steel tube 102 is spliced, until the head end steel tube 101 is pushed out of the bundle passing channel; then thread the tail end steel tube 103 to the last intermediate steel tube 102;

[0062] Step 5: Pull the head end steel pipe 101 outward until it passes through the bundle passage, thereby pulling the corrugated tube 7 forward through the pull rope 6 and passing it into the bundle passage for a distance, then remove the head end steel pipe 101, and then pull the middle steel pipes 102 one by one to drive the corrugated tube 7 forward. During this period, each time an middle steel pipe 102 is pulled out, the middle steel pipe 102 can be removed, and finally pull the tail end steel pipe 103 out of the bundle passage, so that the corrugated tube 7 can pass through the hole 5 and the wedge-shaped rubber rings 2;

[0063] Step 6: Insert the prestressed steel strand into the corrugated tube 7 for tensioning.

[0064] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0065] The present invention is described in detail above in conjunction with the embodiments of the accompanying drawings. A person skilled in the art can make various variations of the present invention according to the above description. Therefore, certain details in the embodiments should not constitute a limitation of the present invention, and the scope of protection of the present invention shall be defined by the scope of the attached claims.

Claims

1. A corrugated pipe bundle threading device suitable for concrete pipe segments constructed by pipe curtain method, characterized in that: include: The holes at the same position on the whole row of concrete pipe sections form a bundle-passing channel for the corrugated pipe to pass through, and the corrugated pipe bundle-passing device includes: A traction rod used to be inserted from the inlet end of the beam-threading channel and pass through the outlet end, wherein the head end of the traction rod is formed into an elliptical head or a round head; A pull rope used to pull the corrugated tube into the bundle passing channel when the pull rod passes through the bundle passing channel, the pull rope being connected to the tail end of the pull rod and the head end of the corrugated tube; A guide assembly is used to constrain the traction rod to pass through the beam passage in a straight line. The guide assembly includes a plurality of groups of wedge-shaped rubber rings arranged at intervals in the beam passage, and the large-diameter end surface of each group of wedge-shaped rubber rings faces the inlet end.

2. The corrugated pipe bundle threading device for concrete pipe segments used in pipe curtain method construction according to claim 1, characterized in that: The traction rod comprises a head end steel pipe, a tail end steel pipe and an intermediate steel pipe group, the elliptical head or round head is formed at the head end of the head end steel pipe, the head end steel pipe and the intermediate steel pipe group are detachably connected, and the intermediate steel pipe group and the tail end steel pipe are detachably connected; The head end steel pipe, the middle steel pipe group and the tail end steel pipe are connected and fixed to form the traction rod, and the projection of the traction rod is a straight line.

3. The corrugated pipe bundle threading device for concrete pipe segments suitable for pipe curtain method construction according to claim 2, characterized in that: The head end steel pipe is threadedly connected to the middle steel pipe group, and the middle steel pipe group is threadedly connected to the tail end steel pipe.

4. The corrugated pipe bundle threading device for concrete pipe segments suitable for pipe curtain method construction according to claim 2, characterized in that: The intermediate steel pipe group includes a plurality of intermediate steel pipes, and adjacent intermediate steel pipes are threadedly connected.

5. The corrugated pipe bundle threading device for concrete pipe segments used in pipe curtain method construction according to claim 1, characterized in that: Each group of wedge-shaped rubber rings includes two wedge-shaped rubber rings, and the two wedge-shaped rubber rings are respectively arranged at the head end and the tail end of the hole on each concrete pipe section.

6. The corrugated pipe bundle threading device for concrete pipe segments used in pipe curtain method construction according to claim 5, characterized in that: The small-diameter end of the wedge-shaped rubber ring is matched with the corrugated pipe.

7. The corrugated pipe bundle threading device for concrete pipe segments suitable for pipe curtain method construction according to claim 1, characterized in that: The traction rod has rigidity to ensure that it does not deform when the wedge-shaped rubber ring is squeezed.

8. A method for threading a corrugated pipe into a concrete pipe segment suitable for pipe-roof construction, characterized in that: The following steps are involved: Step 1: before pushing the concrete pipe segment into the soil layer, provide a plurality of groups of wedge-shaped rubber rings, and arrange the plurality of groups of wedge-shaped rubber rings at intervals in a bundle-penetrating channel formed by holes at the same position on the entire row of concrete pipe segments, and the large-diameter end surface of each group of the wedge-shaped rubber rings faces the inlet end of the bundle-penetrating channel; Step 2: After the working warehouse pipe section and the concrete pipe section are pushed into the soil layer side by side, a traction rod and a pull rope are provided, and the tail end of the traction rod is connected and fixed to the corrugated pipe through the pull rope; Step 3: Push the traction rod into the beam threading channel in the working warehouse pipe section, so that the traction rod passes through several groups of wedge-shaped rubber rings until it passes through the beam threading channel, thereby pulling the corrugated tube forward through the pull rope and passing through the beam threading channel.

9. The method for bundling corrugated pipes in concrete pipe segments suitable for pipe-roof construction as claimed in claim 8, characterized in that: The traction rod comprises a head end steel pipe, a tail end steel pipe and an intermediate steel pipe group, and the elliptical head or round head is formed at the head end of the head end steel pipe; Before implementing step 3, a draw rope is connected and fixed between the tail end steel pipe and the corrugated pipe; step 3 specifically includes the following steps: Insert the first end steel pipe into the bundle passage, and then thread it into the middle steel pipe group; Push the middle steel pipe group to push the first end steel pipe forward, so that the first end steel pipe passes through a plurality of groups of wedge-shaped rubber rings; Continue pushing until the first end steel pipe passes through the bundle passage, and the tail end steel pipe is threadedly connected to the tail end of the middle steel pipe group; Remove the head end steel pipe, then pull the middle steel pipe group out of the bundle passing channel, during which the corrugated tube will be gradually inserted into the bundle passing channel by pulling the pull rope; remove the middle steel pipe group, then pull the tail end steel pipe out of the bundle passing channel, and then pull the corrugated tube completely into the bundle passing channel by pulling the pull rope.

10. The method for threading a corrugated pipe bundle of a concrete pipe segment suitable for pipe curtain method construction according to claim 9, characterized in that: The intermediate steel pipe group includes a plurality of intermediate steel pipes, and adjacent intermediate steel pipes are threadedly connected; When the head end steel pipe, the middle steel pipe group and the tail end steel pipe are threadedly connected for splicing, firstly, an middle steel pipe is threadedly connected to the head end steel pipe, and then the middle steel pipe is pushed to push the head end steel pipe forward a certain distance in the bundle threading channel; then, a number of middle steel pipes are spliced ​​one by one at the tail end of the previous middle steel pipe in a front-to-back order, and each time an middle steel pipe is spliced, the middle steel pipe is pushed to push the head end steel pipe forward until the head end steel pipe is pushed out of the hole; then the tail end steel pipe is threadedly connected to the last middle steel pipe.

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