A walking track and construction method for installing through-pipes

Abstract

The present invention relates to a walking track and construction method for installing a through-pipe, and belongs to the technical field of the through-pipe installation process; it comprises two channel steels buckled at the bottom of a concrete pipe, the two channel steels are parallel to each other and distributed on both sides of the center line of the bottom of the concrete pipe, and the two channel steels are fixed with expansion bolts; a plurality of transverse reinforcing ribs are welded between the two channel steels, a vertically fixed frame bar is fixed at the center line of the bottom of the concrete pipe, and transverse auxiliary bars are welded on the top of the frame bar, and a plurality of guide devices are arranged at intervals along the length direction on the channel steel, and the guide devices on the two channel steels correspond to each other one by one; the guide device comprises a U-shaped limit plate and a steel guide wheel arranged at the opening of the U-shaped limit plate, and is welded to the upper surface of the channel steel with the bottom end of the U-shaped limit plate. The installation process of the entire through-pipe walking track is simple and orderly, with a simple structure, convenient processing, time saving, and convenient installation of the through-pipe.

Description

Technical Field

[0001] The invention relates to the technical field of through-pipe installation technology, and in particular to a walking track and a construction method for through-pipe installation. Background Art

[0002] The water transfer tunnel is an important part of the water diversion and regulation project. The through-hole pipe is one of the structural forms, including an outer lining concrete pipe and an inner lining through-hole steel pipe. During construction, the outer lining concrete pipe is first constructed using the jacking process, and then the inner lining through-hole steel pipe is hydraulically pushed into the outer lining concrete pipe.

[0003] The Chinese patent with application number CN201811628434.0 records the technical solution developed by the applicant to solve the technical problem of "facilitating the pushing of the lining through the steel pipe into the concrete pipe". The solution includes a tunnel body, which is the concrete pipe in this solution. A propulsion system is provided in the tunnel body, and a propulsion device is provided at the entrance of the tunnel body. The propulsion system includes an in-tunnel rolling device and an in-tunnel guide rail device. The in-tunnel rolling device and the in-tunnel guide rail device are arranged at intervals in the tunnel body. The in-tunnel rolling device includes a pair of earrings symmetrically arranged at the bottom of the tunnel body, a steel shaft arranged between the earrings, and a sleeve rotatably arranged on the steel shaft; the through-tunnel steel pipe is pressed on the sleeve and rolled into the concrete pipe. In order to better fix the rolling device, a layer of concrete is poured at the bottom of the tunnel to wrap and fix the rolling device.

[0004] The following problems were encountered during the construction using the above scheme: the structure of the scheme is relatively complex, there are many construction processes, and the construction is difficult and time-consuming; and during the construction process, a layer of concrete must be poured at the bottom of the tunnel to reinforce the rolling device. The process of pouring concrete is relatively time-consuming, which prolongs the construction time. Summary of the invention

[0005] In view of the shortcomings of the prior art, the first object of the present invention is to provide a walking track for penetrating pipe installation, which has the advantages of simple structure, convenient processing, time saving, and convenient installation of penetrating steel pipes.

[0006] The above-mentioned object of the present invention is achieved through the following technical solutions:

[0007] A walking track for through-pipe installation includes two channel steels inverted at the bottom of the inner wall of a concrete pipe, the two channel steels are parallel to each other and distributed on both sides of the center line of the bottom of the concrete pipe, and the two channel steels are fixed with expansion bolts. A plurality of transverse reinforcing ribs are welded between the two channel steels, and the plurality of transverse reinforcing ribs are arranged at intervals along the length direction of the channel steel. A vertically fixed stand bar is arranged at the center line of the bottom of the concrete pipe, the bottom of the stand bar abuts against the bottom of the concrete pipe, and the stand bar passes through the middle of the transverse reinforcing rib and is welded. A transverse auxiliary rib is welded on the top of the stand bar, the transverse auxiliary rib is arranged horizontally and its projection intersects the channel steel vertically. The two ends of the transverse auxiliary rib are flush with the outer edges of the two channel steels respectively. A plurality of guide devices are arranged at intervals along the length direction on the channel steel, and the guide devices on the two channel steels correspond to each other. The guide device includes a U-shaped limit plate and a steel guide wheel arranged at the opening of the U-shaped limit plate. The opening of the U-shaped limit plate is inclined upward along the diameter of the concrete pipe, and the closed end corresponding to the opening of the U-shaped limit plate is welded to the upper surface of the channel steel.

[0008] By adopting the above technical solution, the expansion bolts fix the two channel steels to prevent the two channel steels from sliding off the concrete pipe wall. The multiple transverse reinforcing ribs arranged at intervals support the two channel steels to prevent the channel steels from sliding off the concrete pipe wall when subjected to midday extrusion. The setting of the steel guide wheel changes the sliding friction between the pierced steel pipe and the bottom of the pipe into rolling friction when the pierced steel pipe is pushed forward, reducing the resistance of the pierced steel pipe; and the steel guide wheel plays a guiding role for the pierced steel pipe, facilitating the installation of the pierced steel pipe. The setting of the frame reinforcement and the transverse auxiliary reinforcement first measures the height difference between the frame reinforcement and the center line of the concrete pipe bottom through the elevation of the center line of the bottom of the frame reinforcement, determines the elevation of the frame reinforcement, and then uses the transverse auxiliary reinforcement as a reference to measure a fixed height upward at both ends to determine the position of the top surface of the steel guide wheel; it plays a role in assisting in determining the elevation of the steel guide wheel and facilitating the installation of the steel guide wheel. Compared with the solutions in the background technology, this solution has a simple structure and is easy to construct, which saves a lot of construction time, ensures the structural strength of the steel guide wheel, and facilitates the installation of the through-steel pipe.

[0009] The present invention is further configured as follows: a pad is provided between the channel steel and the U-shaped limiting plate.

[0010] By adopting the above technical solution, it is convenient to adjust the elevation of the steel guide wheel, and the elevation of the steel guide wheel is controlled by adjusting the number of pads.

[0011] The present invention is further configured as follows: an inclined angle steel is arranged between the U-shaped limiting plate and the transverse reinforcing rib, the top end of the angle steel is welded to the upper part of the U-shaped limiting plate, the lower end of the angle steel abuts against the bottom of the concrete pipe, and the side of the angle steel is welded to the side of the transverse reinforcing rib.

[0012] By adopting the above technical solution, the guide device is arranged obliquely along the diameter direction of the concrete pipe. When the pierced steel pipe is placed on the guide wheel, the U-shaped limit plate can only bend toward the inside of the concrete pipe; and the setting of the angle steel strengthens the strength of the guide device and prevents the U-shaped limit plate from bending toward the inside of the concrete pipe.

[0013] The present invention is further configured as follows: longitudinal connecting ribs for connecting a plurality of U-shaped limiting plates are welded on the outer edge of the U-shaped limiting plate, and the longitudinal connecting ribs are located at the upper end of the U-shaped limiting plate.

[0014] By adopting the above technical solution, the longitudinal connecting ribs connect the guide devices located on the same side in series into a whole, thereby ensuring the integrity of the multiple guide devices arranged at intervals along the length direction of the channel steel.

[0015] The present invention is further configured as follows: a support plate is welded on each U-shaped limiting plate, the top of the support plate is welded to the upper and middle parts of the two ribs of the U-shaped limiting plate, and the bottom of the support plate is welded to the upper surface of the channel steel; the support plate is located on the side of the U-shaped limiting plate away from the concrete pipe inlet.

[0016] By adopting the above technical solution, when the pierced steel pipe is pushed into the concrete pipe, the pierced steel pipe generates a thrust on the guide device toward the concrete pipe outlet, and the added support plate is located on the side of the guide device away from the concrete pipe inlet. When the thrust acts on the guide device, the support plate generates a supporting force on the guide device in the opposite direction to the thrust, thereby strengthening the connection strength between the guide device and the channel steel.

[0017] The present invention is further configured as follows: two ends of the transverse auxiliary ribs are respectively welded to the angle steel and the U-shaped limiting plate through which the ribs pass.

[0018] By adopting the above technical solution, when the through-steel pipe is placed on the guide rail, the vertical reinforcement and the transverse auxiliary reinforcement connect the guide devices on the two guide rails into a whole, which can assist the steel guide wheel in bearing force.

[0019] The second object of the present invention is to provide a method for installing a walking track for through-pipe installation, which is simple to operate, facilitates the precise positioning of the steel guide wheel, and saves the construction time of the steel guide wheel.

[0020] The above-mentioned object of the present invention is achieved through the following technical solutions:

[0021] A construction method for a walking track for through-pipe installation:

[0022] S1: Review the design axis and design elevation of the steel pipe through the concrete pipe;

[0023] S2: Calculate in advance the elevation of the top surface of the guide rail and the top surface of the steel guide wheel to be installed at the bottom of the concrete pipe;

[0024] S3: Determine the laying angle and position of the channel steel according to the force analysis and calculation of the through-steel pipe; measure and lay out the position of the channel steel in the concrete pipe, first lay out the center line of the concrete pipe and mark it, then determine the position of the channel steel on both sides through the center line and mark it;

[0025] S4: Place the channel steel upside down on the pipe walls on both sides of the concrete pipe bottom according to the marked position and fix it with expansion bolts;

[0026] S5: Weld the two ends of the transverse reinforcing rib to the two channel steels;

[0027] S6: Weld the frame reinforcement in the middle of the transverse reinforcing rib, weld the transverse auxiliary reinforcement on the top of the frame reinforcement, the transverse auxiliary reinforcement is set horizontally and its projection intersects the channel steel vertically; the two ends of the transverse auxiliary reinforcement are flush with the outer edges of the two channel steels respectively; the elevation of the transverse auxiliary reinforcement is determined by measuring the height difference between the top of the frame reinforcement and the center line of the bottom of the pipe;

[0028] S7: A plurality of guide devices are arranged at intervals along the length direction of the channel steel, and the guide devices on the two channel steels correspond to each other one by one; the guide device includes a U-shaped limit plate and a steel guide wheel arranged at the opening of the U-shaped limit plate. When installing the guide device, the transverse auxiliary ribs are used as a reference, and a fixed height is measured upward at both ends to determine the position of the top surface of the steel guide wheel, and then the bottom of the guide device is welded and fixed;

[0029] S8: Angle steel is provided: the top of the angle steel is welded to the upper end of the U-shaped limiting plate, the lower end of the angle steel abuts against the bottom of the concrete pipe, and the side of the bottom of the angle steel is welded to the side of the transverse reinforcing rib;

[0030] S9: Welded support plate: The top of the support plate is welded to the middle and upper part of the two ribs of the U-shaped limit plate, and the bottom of the support plate is welded to the upper surface of the channel steel; the support plate is located on the side of the guide device away from the entrance of the concrete pipe;

[0031] S10: A longitudinal connecting rib is welded on the outer edge of the U-shaped limiting plate, and the longitudinal connecting rib connects the guide devices located on the same side in series into a whole;

[0032] S11: Both ends of the transverse auxiliary reinforcement are welded to the passing angle steel and U-shaped limiting plate respectively.

[0033] By adopting the above technical solution, compared with the solution in the background technology, this solution has a simple structure, is easy to construct, saves a lot of construction time, ensures the structural strength of the steel guide wheel, and facilitates the installation of the pierced steel pipe. Especially for the positioning and installation of the steel guide wheel, the setting of the vertical reinforcement and the transverse auxiliary reinforcement facilitates the positioning and installation of the steel guide wheel, saves the time for positioning and installing the steel guide wheel, and is convenient for the construction of the operators.

[0034] In summary, the beneficial technical effects of the present invention are:

[0035] 1. The setting of the vertical reinforcement and the transverse auxiliary reinforcement plays a role in assisting in determining the elevation of the steel guide wheel, facilitating the installation of the steel guide wheel and saving the construction time of the steel guide wheel; and the transverse auxiliary reinforcement connects the guide devices on the two guide rails into a whole, which can assist the steel guide wheel in bearing force;

[0036] 2. Use expansion bolts to fix the two channel steels to prevent them from sliding off the concrete pipe wall;

[0037] 3. Multiple transverse reinforcing ribs arranged at intervals support the two channel steels, preventing the channel steels from sliding off the concrete pipe wall when subjected to midday extrusion;

[0038] 4. The longitudinal connecting ribs connect the guide devices on the same side in series into a whole, ensuring the integrity of multiple guide devices spaced apart along the length of the channel steel;

[0039] 5. The setting of angle steel strengthens the strength of the guide device and prevents the U-shaped limit plate from bending toward the inside of the concrete pipe;

[0040] 6. The setting of the support plate strengthens the connection strength between the guide device and the channel steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic diagram of the structure of the present invention;

[0042] Figure 2 yes Figure 1 The enlarged schematic diagram of part A in the middle;

[0043] Figure 3 This is a front view schematic diagram after the steel pipe is pierced and inserted into the concrete pipe;

[0044] Figure 4 is a partial side view schematic diagram of the present invention;

[0045] Figure 5 yes Figure 4 Enlarged view of part B.

[0046] In the figure, 1. concrete pipe; 2. through-hole steel pipe; 3. channel steel; 31. transverse reinforcing rib; 32. expansion bolt; 4. frame reinforcement; 41. transverse auxiliary reinforcement; 5. angle steel; 6. guide device; 61. U-shaped limit plate; 62. steel guide wheel; 7. support plate; 8. longitudinal connecting rib; 9. pad. DETAILED DESCRIPTION

[0047] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0048] Embodiment 1:

[0049] Reference Figure 1 and Figure 2 , is a walking track for through-pipe installation disclosed by the present invention, comprising two channel steels 3 inverted on the inner wall of the concrete pipe 1 on both sides of the center line of the bottom, and the two channel steels 3 are fixed with expansion bolts 32. Prevent the two channel steels 3 from sliding off the wall of the concrete pipe 1. A plurality of transverse reinforcing ribs 31 are welded between the two channel steels 3, and the plurality of transverse reinforcing ribs 31 are arranged at intervals along the length direction of the channel steel 3. A frame bar 4 is vertically fixed to the bottom of the concrete pipe 1, and the bottom of the frame bar 4 is located on the center line of the bottom of the concrete pipe 1, and the bottom of the frame bar 4 abuts against the bottom of the concrete pipe 1, and the frame bar 4 passes through the middle of the transverse reinforcing rib 31 and welds the frame bar 4 to the transverse reinforcing rib 31.

[0050] Reference Figure 2 Figure 3 , and a transverse auxiliary rib 41 is welded on the top of the frame bar 4, the transverse auxiliary rib 41 is arranged horizontally and its projection intersects the channel steel 3 vertically; the two ends of the transverse auxiliary rib 41 are respectively flush with the outer edges of the two channel steels 3; a plurality of guide devices 6 are arranged on the channel steel 3 along the length direction, and the guide devices 6 on the two channel steels 3 correspond to each other. The guide device 6 includes a U-shaped limit plate 61 and a steel guide wheel 62 arranged at the opening of the U-shaped limit plate 61, the opening of the U-shaped limit plate 61 is inclined upward along the diameter of the concrete pipe 1, and the closed end corresponding to the opening of the U-shaped limit plate 61 is welded to the upper surface of the channel steel 3. The guide device 6 facilitates the installation of the through-hole steel pipe 2. When installing the guide device 6, first measure the height difference between the frame bar 4 and the bottom center line of the concrete pipe 1 at the bottom of the frame bar 4, and determine the elevation of the frame bar 4. Then, take the transverse auxiliary rib 41 as a reference, measure a fixed height upward at both ends, and determine the position of the top surface of the steel guide wheel 62. It plays a role in assisting in determining the elevation of the steel guide wheel 62 and facilitating the installation of the steel guide wheel 62.

[0051] An inclined angle steel 5 is arranged between the U-shaped limit plate 61 and the transverse reinforcing rib 31, the top of the angle steel 5 is welded to the upper end of the U-shaped limit plate 61, the lower end of the angle steel 5 is abutted against the bottom of the concrete pipe 1, and the side of the angle steel 5 is welded to the side of the transverse reinforcing rib 31. The guide device 6 is arranged obliquely along the diameter direction of the concrete pipe 1, and when the U-shaped limit plate 61 is placed on the steel guide wheel 62 after penetrating the steel pipe 2, it can only bend toward the inside of the concrete pipe 1; and the arrangement of the angle steel 5 strengthens the strength of the guide device 6, preventing the U-shaped limit plate 61 from bending toward the inside of the concrete pipe 1.

[0052] Reference Figure 4 and Figure 5A support plate 7 is welded on the U-shaped limiting plate 61, the top of the support plate 7 is welded to the middle and upper part of the two ribs of the U-shaped limiting plate 61, and does not contact the steel guide wheel 62, and the bottom of the support plate 7 is welded to the upper surface of the channel steel 3; the support plate 7 is located on the side of the U-shaped limiting plate 61 away from the entrance of the concrete pipe 1.

[0053] Combination Figure 2 and Figure 5 When the pierced steel pipe 2 is pushed into the concrete pipe 1, the pierced steel pipe 2 generates a thrust on the guide device 6 toward the outlet of the concrete pipe 1. The added support plate 7 is located on the side of the guide device 6 away from the inlet of the concrete pipe 1. When the thrust acts on the guide device 6, the support plate 7 generates a supporting force on the guide device 6 in the opposite direction to the thrust, thereby strengthening the connection strength between the guide device 6 and the channel steel 3.

[0054] Replay Figure 2 A longitudinal connecting rib 8 is welded on the outer edge of the U-shaped limiting plate 61 , and the longitudinal connecting rib 8 connects the guide devices 6 located on the same side in series into a whole, thereby ensuring the integrity of the multiple guide devices 6 spaced apart along the length direction of the channel steel 3 .

[0055] Reference Figure 3 The two ends of the transverse auxiliary rib 41 are respectively welded to the angle steel 5 and the U-shaped limit plate 61, and the welding position of the transverse auxiliary rib 41 and the two is not at the same place as the welding position of the angle steel 5 and the U-shaped limit plate 61. When the through-hole steel pipe 2 is placed on the guide rail, the transverse auxiliary rib 41 connects the guide devices 6 on the two guide rails into a whole, which can assist the steel guide wheel 62 in bearing force.

[0056] The expansion bolts 32 fix the two channel steels 3 to prevent the two channel steels 3 from sliding off the wall of the concrete pipe 1. The multiple transverse reinforcing ribs 31 arranged at intervals support the two channel steels 3 to prevent the channel steels 3 from sliding off the wall of the concrete pipe 1 when subjected to midday extrusion. The setting of the steel guide wheel 62 changes the sliding friction between the pierced steel pipe 2 and the bottom of the pipe into rolling friction when the pierced steel pipe 2 is pushed forward, reducing the resistance encountered by the pierced steel pipe 2; and the steel guide wheel 62 guides the pierced steel pipe 2, facilitating the installation of the pierced steel pipe 2. The setting of the frame reinforcement 4 and the transverse auxiliary reinforcement 41 is firstly to measure the height difference between the frame reinforcement 4 and the bottom center line of the concrete pipe 1 at the bottom of the frame reinforcement 4, and determine the elevation of the frame reinforcement 4, and then take the transverse auxiliary reinforcement 41 as a reference, measure a fixed height upward at both ends, and determine the position of the top surface of the steel guide wheel 62; it plays a role in assisting in determining the elevation of the steel guide wheel 62 and facilitating the installation of the steel guide wheel 62. Compared with the scheme in the background technology, this scheme has a simple structure, is easy to construct, saves a lot of construction time, and ensures the structural strength of the steel guide wheel 62, facilitating the installation of the through-steel pipe 2.

[0057] Embodiment 2:

[0058] A construction method for a walking track for through-pipe installation:

[0059] S1: Review the design axis and design elevation of the concrete pipe 1 penetrating the steel pipe 2;

[0060] S2: Pre-calculate the elevation of the top surface of the guide rail to be installed at the bottom of the concrete pipe 1 and the top surface of the steel guide wheel 62;

[0061] S3: Determine the laying angle and laying position of the channel steel 3 according to the force analysis calculation of the pierced steel pipe 2; measure and lay out the position of the channel steel 3 in the concrete pipe 1, first lay out the center line of the concrete pipe 1 and mark it, and then determine the position of the channel steel 3 on both sides through the center line and mark it;

[0062] S4: The channel steel 3 is inverted on the pipe walls on both sides of the bottom of the concrete pipe 1 according to the marked position, and fixed with expansion bolts 32;

[0063] S5: welding the two ends of the transverse reinforcing rib 31 to the two channel steels 3;

[0064] S6: welding the frame rib 4 in the middle of the transverse reinforcing rib 31, and welding the transverse auxiliary rib 41 on the top of the frame rib 4, wherein the transverse auxiliary rib 41 is arranged horizontally and its projection intersects the channel steel 3 vertically; the two ends of the transverse auxiliary rib 41 are respectively flush with the outer edges of the two channel steels 3; the elevation of the transverse auxiliary rib 41 is determined by measuring the height difference between the top of the frame rib 4 and the center line of the bottom of the pipe;

[0065] S7: A plurality of guide devices 6 are arranged at intervals along the length direction on the channel steel 3, and the guide devices 6 on the two channel steels 3 correspond to each other one by one; the guide device 6 comprises a U-shaped limit plate 61 and a steel guide wheel 62 arranged at the opening of the U-shaped limit plate 61. When installing the guide device 6, the transverse auxiliary rib 41 is used as a reference, and a fixed height is measured upward at both ends thereof to determine the position of the top surface of the steel guide wheel 62, and then the bottom of the guide device 6 is welded and fixed;

[0066] S8: Angle steel 5 is provided: the top of angle steel 5 is welded to the upper end of U-shaped limiting plate 61, the lower end of angle steel 5 is abutted to the bottom of concrete pipe 1, and the side surface of the bottom of angle steel 5 is welded to the side surface of transverse reinforcing rib 31;

[0067] S9: Welding the support plate 7: The top of the support plate 7 is welded to the middle and upper parts of the two ribs of the U-shaped limiting plate 61, and the bottom of the support plate 7 is welded to the upper surface of the channel steel 3; the support plate 7 is located on the side of the guide device 6 away from the entrance of the concrete pipe 1;

[0068] S10: A longitudinal connecting rib 8 is welded on the outer edge of the U-shaped limiting plate 61, and the longitudinal connecting rib 8 connects the guide devices 6 located on the same side in series into a whole;

[0069] S11: Both ends of the transverse auxiliary rib 41 are respectively welded to the passing angle steel 5 and the U-shaped limiting plate 61 .

[0070] Compared with the solution in the background technology, this solution has a simple structure, is easy to construct, saves a lot of construction time, ensures the structural strength of the steel guide wheel 62, and facilitates the installation of the pierced steel pipe 2. Especially for the positioning and installation of the steel guide wheel 62, the setting of the vertical reinforcement 4 and the transverse auxiliary reinforcement 41 facilitates the positioning and installation of the steel guide wheel 62, saves the time for positioning and installing the steel guide wheel 62, and is convenient for the construction of the operators.

[0071] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A construction method for installing a walking track through a pipe, characterized in that: The following steps are involved: S1: Review the design axis and design elevation of the steel pipe (2) penetrated in the concrete pipe (1); S2: Calculate in advance the elevation of the top surface of the guide rail and the top surface of the steel guide wheel (62) to be installed at the bottom of the concrete pipe (1); S3: Determine the laying angle and laying position of the channel steel (3) based on the force analysis and calculation of the penetrated steel pipe (2); Measure and lay out the position of the channel steel (3) in the concrete pipe (1), first lay out the center line of the concrete pipe (1) and mark it, and then determine the position of the channel steel (3) on both sides through the center line and mark it; S4: Invert the channel steel (3) on the pipe wall on both sides of the bottom of the concrete pipe (1) according to the marked position, and The transverse reinforcement rib (31) is fixed with expansion bolts (32); S5: the two ends of the transverse reinforcement rib (31) are welded to the two channel steels (3); S6: the frame rib (4) is welded in the middle of the transverse reinforcement rib (31), and the transverse auxiliary rib (41) is welded on the top of the frame rib (4), the transverse auxiliary rib (41) is arranged horizontally and its projection intersects the channel steel (3) vertically; the two ends of the transverse auxiliary rib (41) are respectively flush with the outer edges of the two channel steels (3); the elevation of the transverse auxiliary rib (41) is determined by measuring the height difference between the top of the frame rib (4) and the center line of the bottom of the pipe; S7: a plurality of guide devices ( 6), and the guide devices (6) on the two channel steels (3) correspond one to one; the guide device (6) includes a U-shaped limit plate (61) and a steel guide wheel (62) arranged at the opening of the U-shaped limit plate (61). When installing the guide device (6), the transverse auxiliary ribs (41) are used as a reference, and a fixed height is measured upward at both ends to determine the position of the top surface of the steel guide wheel (62), and then the bottom of the guide device (6) is welded and fixed; S8: Angle steel (5) is arranged: the top of the angle steel (5) is welded to the upper end of the U-shaped limit plate (61), the lower end of the angle steel (5) is abutted against the bottom of the concrete pipe (1), and the side of the bottom of the angle steel (5) is welded to the bottom of the concrete pipe (1). connected to the side of the transverse reinforcing rib (31); S9: welding the support plate (7): the top of the support plate (7) is welded to the middle and upper parts of the two ribs of the U-shaped limiting plate (61), and the bottom of the support plate (7) is welded to the upper surface of the channel steel (3); the support plate (7) is located on the side of the guide device (6) away from the entrance of the concrete pipe (1); S10: longitudinal connecting ribs (8) are welded on the outer edge of the U-shaped limiting plate (61), and the longitudinal connecting ribs (8) connect the guide devices (6) located on the same side in series into a whole; S11: the two ends of the transverse auxiliary rib (41) are respectively welded to the passing angle steel (5) and the U-shaped limiting plate (61).

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