Tunnel large-diameter PE pipe installation delivery trolley and construction method thereof

Abstract

The application provides a tunnel large-diameter PE pipe installation and transportation trolley and a construction method thereof. The trolley is arranged in a tunnel, and the upper part of the trolley supports a PE pipe. The lower side of the trolley is provided with a supporting unit, the supporting unit is fixedly connected with the tunnel, the supporting unit comprises a steel grating plate, the trolley comprises a first load-bearing plate, corner frames are symmetrically arranged on the two sides of the first load-bearing plate, first rollers are arranged on the corner frames, and the first rollers are slidably connected with the side walls of the steel grating plate. The application is designed ingeniously, can greatly improve the long-distance transportation efficiency of the large-diameter PE pipe, and can ensure low use cost and convenient operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engineering construction, and in particular to a tunnel large-diameter PE pipe installation and transportation trolley and a construction method thereof. BACKGROUND

[0002] The laying of a water treatment pipeline is a relatively time-consuming and labor-consuming process. Municipal engineering piles are limited by the narrow space in the tunnel for the long-distance installation of large-diameter PE pipelines, and the transportation movement is relatively troublesome. If a direct dragging method is used, the operation is very inconvenient due to the large external friction, and the external PE pipe is easily damaged. Another method is to install a track in the tunnel, use the track as a support to install a trolley, and then the trolley is transported. However, this method needs to disassemble the track after the pipeline installation is completed, and the overall engineering quantity is large, the construction period is relatively long, and the cost is high. Chinese patent document CN108128608 A discloses a pipe jacking transportation device, but the device is relatively troublesome to install and disassemble, still needs to install a track, and has defects in use and needs to be improved. SUMMARY

[0003] The present application provides a tunnel large-diameter PE pipe installation and transportation trolley and a construction method thereof, which solves the problems of long-distance transportation of PE pipes, low construction efficiency, and inconvenient overall operation.

[0004] To solve the above technical problems, the technical scheme adopted by the present application is: a tunnel large-diameter PE pipe installation and transportation trolley, comprising a transportation trolley arranged in a tunnel, a PE pipe supported on the upper part of the transportation trolley, a support unit arranged on the lower side of the transportation trolley, the support unit being fixedly connected with the tunnel, the support unit comprising a steel grating plate, the transportation trolley comprising a first load-bearing plate, corner frames symmetrically arranged on both sides of the first load-bearing plate, first rollers rotatably arranged on the corner frames, and the first rollers being slidably connected with the side walls of the steel grating plate.

[0005] In a preferred scheme, the support unit comprises a plurality of vertical plates symmetrically arranged on both sides of the tunnel along the axial direction of the tunnel, two opposite vertical plates are connected by a cross beam, and two adjacent cross beams are connected by a steel grating plate.

[0006] In a preferred scheme, first recesses are arranged on both sides of the first load-bearing plate, telescopic rods are arranged in the first recesses, a jacking rod is arranged on one side of the telescopic rod, a fixed plate is vertically arranged on one side of the corner frame, and the jacking rod is fixedly connected with the fixed plate.

[0007] In a preferred scheme, a third recess is arranged on the upper part of the first recess, a first motor is arranged in the third recess, a threaded rod is arranged at the bottom of the first motor, a connecting plate is arranged on the upper part of the telescopic rod, a second threaded hole is arranged on the connecting plate, and the threaded rod is arranged in the second threaded hole.

[0008] In the preferred scheme, the first groove is provided with a first sliding groove on one side, the telescopic rod is provided with a T-shaped sliding block on one side, the T-shaped sliding block is located in the first sliding groove, two protrusions are provided in parallel on the telescopic rod, a plurality of first threaded holes are provided in the third groove, and the first motor is connected with the third groove through the locking pin.

[0009] In the preferred scheme, two supporting units are symmetrically arranged on the upper portion of the first load-bearing plate, the supporting unit comprises a second load-bearing plate, two locking rods are provided in parallel on the bottom of the second load-bearing plate, the locking rod is threadedly connected with the fourth threaded hole, the fourth threaded hole is located on the upper portion of the first load-bearing plate, the second load-bearing plate is provided with an avoiding groove on the upper portion, and inclined surfaces are arranged on the two sides of the avoiding groove.

[0010] In the preferred scheme, the second load-bearing plate is provided with a pad plate on the bottom, the pad plate is provided with a second sliding groove on each side, the locking rod is slidably connected with the second sliding groove, the second sliding groove is provided with a fifth threaded hole, the locking pin is arranged in the fifth threaded hole, two locking rings are provided in parallel on the locking rod, a gap is arranged between the two locking rings, the size of the gap is matched with the size of the second sliding groove, and a nut is fixedly arranged on the upper locking rod.

[0011] In the preferred scheme, the second groove is arranged in the middle of the first load-bearing plate, a plurality of third threaded holes are arranged in the second groove, and the separation unit is fixedly arranged in the second groove. The separation unit comprises a cylinder body, the cylinder body is provided with a mounting disc on the bottom, the locking pin is arranged in the mounting disc and the third threaded hole, a jacking column is arranged in the cylinder body, the top of the jacking column is provided with a mounting frame, and a second roller is rotatably arranged on the mounting frame.

[0012] In the preferred scheme, the first load-bearing plate is provided with a supporting plate on the bottom, a plurality of counterbores are arranged on the supporting plate, and a third motor is detachably arranged on the upper portion of the corner support.

[0013] A construction method of a conveying trolley comprises the following steps:

[0014] S1, the installation height and position of the supporting unit are set according to the size of the tunnel, and the conveying trolley is manufactured;

[0015] S2, the vertical plate, the cross beam and the steel grating plate are installed according to the axial direction of the tunnel;

[0016] S3, the first load-bearing plate is placed on the steel grating plate, and then the installation of other components is completed;

[0017] S4, the supporting unit is installed on the upper portion of the conveying trolley, the PE pipe is hoisted to the upper portion of the conveying trolley, a traction mechanism is arranged in the tunnel, and the traction mechanism is connected with the end portion of the conveying trolley;

[0018] S5, the telescopic rod is opened to extend the jacking rod outward to avoid interference with the steel grating plate, the height of the first roller is adjusted by starting the first motor, and then the jacking rod is retracted until the first roller is attached to the outer side wall of the steel grating plate.

[0019] S6, after the pipe body is pulled to the design position by the traction mechanism, fine adjustment is carried out, then the wooden square is placed symmetrically on both sides of the beam, the jack is fixed on the wooden square, and the PE pipe is lifted by the shims;

[0020] S7, the first roller is separated from the side wall of the steel grating plate, is adjusted to the upper side of the steel grating plate, and the first roller as a whole and the steel grating plate do not interfere.

[0021] S8, according to the size of the space on both sides of the PE pipe, the separation unit close to the larger space is opened, and then the second roller is lifted until the first bearing plate is separated from the bottom of the PE pipe.

[0022] S9, the steps S3~S8 are repeated, the installation of all PE pipes is completed, and then the transport trolley is disassembled.

[0023] The beneficial effects of the present application are: by setting the transport trolley, the PE pipe can be quickly installed, the transport trolley follows the movement of the PE pipe, without considering the problem that the flange outer diameter is larger than the PE pipe outer diameter, the operation is simple, the safety risk is low, the trolley is convenient to assemble and disassemble, the overall construction efficiency is greatly improved, the transportation demand of the narrow space in the tunnel is met, the steel grating plate is dual-purpose, which is used as a slide limiting before the PE pipe installation and as a permanent support after the PE pipe installation, directly reducing the installation and disassembly process of the track, ensuring low economic cost and good economic benefits. BRIEF DESCRIPTION OF DRAWINGS

[0024] The present application will be further described below in combination with the drawings and examples:

[0025] Figure 1 is the overall structure schematic diagram of the present application used in the tunnel;

[0026] Figure 2 is the front view schematic diagram of Figure 1 ;

[0027] Figure 3 is the internal structure diagram state one of Figure 1 ;

[0028] Figure 4 is the internal structure diagram state two of Figure 1 ;

[0029] Figure 5 is the left view schematic diagram of Figure 4 ;

[0030] Figure 6 is the front view schematic diagram of Figure 4 ;

[0031] Figure 7 is Figure 4 a top view schematic diagram;

[0032] Figure 8 is a schematic diagram of the installation of the consignment trolley of the present application in state one;

[0033] Figure 9 is a schematic diagram of the installation of the consignment trolley of the present application in state two;

[0034] Figure 10 is Figure 8 a left view schematic diagram;

[0035] Figure 11 is Figure 8 a top view schematic diagram;

[0036] Figure 12 Figure 8 a front view schematic diagram;

[0037] Figure 13 is an overall structure exploded schematic diagram of the consignment trolley of the present application;

[0038] Figure 14 is a schematic diagram of the connection structure of the consignment trolley and the steel grating plate of the present application in state one;

[0039] Figure 15 is Figure 14 a front view schematic diagram;

[0040] Figure 16 is Figure 14 a top view schematic diagram;

[0041] Figure 17 is Figure 14 a left view schematic diagram;

[0042] Figure 18 is a schematic diagram of the connection structure of the consignment trolley and the steel grating plate of the present application in state two;

[0043] Figure 19 is a schematic diagram of the connection structure of the consignment trolley and the steel grating plate of the present application in state three;

[0044] Figure 20 is a schematic diagram of the connection structure of the consignment trolley and the steel grating plate of the present application in state four;

[0045] Figure 21 is an overall structure schematic diagram of the bearing unit of the present application;

[0046] Figure 22 is Figure 21 an exploded structure schematic diagram.

[0047] In the figure: tunnel 1; support unit 2; vertical plate 201; crossbeam 202; steel grating plate 203; PE pipe 3; pipe body 301; flange plate 302; delivery trolley 4; first load-bearing plate 401; corner frame 402; first roller 403; telescopic rod 404; first motor 405; first groove 406; first slide 407; first threaded hole 408; connecting plate 409; second threaded hole 410; top rod 411; T-shaped slide 412; protrusion 413; fixed plate 414; third threaded hole 415; fourth threaded hole 416; supporting plate 417; third motor 418; second groove 419; third groove 420; threaded rod 421; counterbore 422; disengagement unit 5; cylinder body 501; mounting disc 502; top column 503; mounting frame 504; second roller 505; jack 6; batten 7; pad iron 8; supporting unit 9; second load-bearing plate 901; locking rod 902; avoidance groove 903; inclined surface 904; heightening plate 905; second slide 906; fifth threaded hole 907; locking ring 908; gap 909; nut 910; locking nail 10. DETAILED DESCRIPTION

[0048] As Figures 1-12 In the figure: tunnel 1; support unit 2; vertical plate 201; crossbeam 202; steel grating plate 203; PE pipe 3; pipe body 301; flange plate 302; delivery trolley 4; first load-bearing plate 401; corner frame 402; first roller 403; telescopic rod 404; first motor 405; first groove 406; first slide 407; first threaded hole 408; connecting plate 409; second threaded hole 410; top rod 411; T-shaped slide 412; protrusion 413; fixed plate 414; third threaded hole 415; fourth threaded hole 416; supporting plate 417; third motor 418; second groove 419; third groove 420; threaded rod 421; counterbore 422; disengagement unit 5; cylinder body 501; mounting disc 502; top column 503; mounting frame 504; second roller 505; jack 6; batten 7; pad iron 8; supporting unit 9; second load-bearing plate 901; locking rod 902; avoidance groove 903; inclined surface 904; heightening plate 905; second slide 906; fifth threaded hole 907; locking ring 908; gap 909; nut 910; locking nail 10.

[0049] In the preferred scheme, the support unit 2 includes a plurality of vertical plates 201 symmetrically arranged on both sides of the tunnel 1 along the axial direction of the tunnel 1, and the opposite two vertical plates 201 are connected through the crossbeam 202, and the adjacent two crossbeams 202 are connected through the steel grating plate 203. By this structure, the whole is convenient to install and disassemble, the steel grating plate 203 is convenient to fix, and at the same time, the support stability of the PE pipe 3 can be guaranteed.

[0050] In the preferred scheme, the first load-bearing plate 401 is provided with a first recess 406 on each side, and a telescopic rod 404 is arranged in the first recess 406. The telescopic rod 404 is provided with a top rod 411 on one side. The corner stand 402 is vertically provided with a fixed plate 414 on one side, and the top rod 411 and the fixed plate 414 are fixedly connected. Thus, the position of the first roller 403 can be adjusted by the top rod 411 at the front end of the telescopic rod 404, so as to change the fitting state with the steel grating plate 203, and the use of steel grating plates 203 of different sizes can be facilitated.

[0051] As Figures 13-20 In the preferred scheme, the first recess 406 is provided with a third recess 420 at the upper portion, and a first motor 405 is arranged in the third recess 420. The first motor 405 is provided with a threaded rod 421 at the bottom. The telescopic rod 404 is provided with a connecting plate 409 at the upper portion, and the connecting plate 409 is provided with a second threaded hole 410. The threaded rod 421 is arranged in the second threaded hole 410. Thus, the height of the first roller 403 can be adjusted by the first motor 405, so as to switch the state of the first roller 403 and avoid interference between the first roller 403 and the steel grating plate 203.

[0052] In the preferred scheme, the first recess 406 is provided with a first slide 407 on one side. The telescopic rod 404 is provided with a T-shaped slide block 412 on one side, and the T-shaped slide block 412 is arranged in the first slide 407. Two protrusions 413 are arranged in parallel on the telescopic rod 404. The third recess 420 is provided with a plurality of first threaded holes 408. The first motor 405 is connected to the third recess 420 by a lock pin 10. Thus, the overall movement is facilitated, the telescopic rod 404 has high precision in repeated movement, and the protrusions 413 can play a role in detecting the limit, so as to ensure good use effect.

[0053] As Figures 21-22 In the preferred scheme, the first load-bearing plate 401 is provided with two supporting units 9 symmetrically at the upper portion. The supporting unit 9 comprises a second load-bearing plate 901. The second load-bearing plate 901 is provided with two lock rods 902 in parallel at the bottom. The lock rods 902 are threadedly connected to fourth threaded holes 416. The fourth threaded holes 416 are arranged at the upper portion of the first load-bearing plate 401. The second load-bearing plate 901 is provided with an avoidance groove 903 at the upper portion. The avoidance groove 903 is provided with inclined surfaces 904 on both sides. Thus, the second load-bearing plate 902 can better support the PE pipe 3. The inclined surfaces 904 on both sides play a role in positioning and limiting the degree of freedom, so as to prevent the PE pipe 3 from tilting and sliding to one side.

[0054] In the preferred embodiment, a raised plate 905 is provided at the bottom of the second load-bearing plate 901, and second slide rails 906 are provided on both sides of the raised plate 905. The locking rod 902 is slidably connected to the second slide rails 906. A fifth threaded hole 907 is provided in the second slide rail 906, and a locking pin 10 is provided in the fifth threaded hole 907. Two locking rings 908 are provided in parallel on the locking rod 902, and a gap 909 is provided between the two locking rings 908. The gap 909 is matched with the size of the second slide rail 906. A nut 910 is fixed on the upper side of the locking rod 902. With this structure, the locking rod 902 can be quickly installed into the fourth threaded hole 416 on the first load-bearing plate 401 with tools. The second load-bearing plate 901 can be replaced as needed, and the raised plate 905 can fit against the upper surface of the first load-bearing plate 401, thus ensuring the load-bearing capacity.

[0055] In a preferred embodiment, the first load-bearing plate 401 has a second groove 419 in its middle, and a plurality of third threaded holes 415 are provided in the second groove 419. The release unit 5 is fixed in the second groove 419. The release unit 5 includes a cylinder 501, and a mounting plate 502 is provided at the bottom of the cylinder 501. Locking pins 10 pass through the mounting plate 502 and the third threaded holes 415. A top column 503 passes through the cylinder 501, and a mounting bracket 504 is provided at the top of the top column 503. A second roller 505 is mounted on the mounting bracket 504. With this structure, when the transport trolley 4 transports the PE pipe 3 to the designed position, the first roller 403 is raised and detached from the side wall of the steel grid plate 203. Then, the top column 503 rises, and the limiting action of the second roller 505 pushes the first load-bearing plate 401 out of the gap at the bottom of the PE pipe 3, completing the transport work.

[0056] In the preferred embodiment, the bottom of the first load-bearing plate 401 is provided with a support plate 417, which has multiple countersunk holes 422. The upper part of the corner frame 402 is detachably equipped with a third motor 418, which is connected to the first roller 403. The support plate 417 is made of polytetrafluoroethylene (PTFE), which ensures low friction and load-bearing capacity. The third motor 418 can be finely adjusted after being disengaged from the traction mechanism, making it convenient to use.

[0057] In the preferred embodiment, the construction method of the transport trolley includes the following steps:

[0058] S1. Set the installation height and position of the support unit 2 according to the size of tunnel 1, and complete the fabrication of the transport trolley 4;

[0059] S2. Install the vertical plate 201, the horizontal beam 202 and the steel grating 203 according to the axis of tunnel 1;

[0060] S3. Place the first load-bearing plate 401 on the steel grating plate 203, and then complete the installation of other components in this way;

[0061] S4, install the supporting unit 9 on the upper part of the carrying trolley 4, hoist the PE pipe 3 to the upper part of the carrying trolley 4, and set a traction mechanism in the tunnel 1, and connect the traction mechanism and the end of the carrying trolley 4;

[0062] S5, extend the telescopic rod 404 outward to extend the jacking rod 411 outward to avoid interference with the steel grating plate 203, then start the first motor 405 to adjust the height of the first roller 403, and then retract the jacking rod 411 until the first roller 403 is attached to the outer sidewall of the steel grating plate 203;

[0063] S6, after the pipe body 301 is pulled to the design position by the traction mechanism, fine adjustment is performed, then the wooden blocks 7 are symmetrically placed on both sides of the beam 202, the jacks 6 are fixed on the wooden blocks 7, and the PE pipe 3 is lifted by the shims 8, and then the flange plate 302 is fixed on the PE pipe 3 which has been installed;

[0064] S7, the first roller 403 is separated from the sidewall of the steel grating plate 203, adjusted to the upper side of the steel grating plate 203, and ensured that the first roller 403 as a whole does not interfere with the steel grating plate 203.

[0065] S8, according to the size of the space on both sides of the PE pipe 3, the separation unit 5 is selected, the separation unit 5 on the side with larger space is opened, and then the second roller 505 is jacked up until the first bearing plate 401 is separated from the bottom of the PE pipe 3;

[0066] S9, repeat the above steps S3~ S8 to complete the installation of all PE pipes 3, and then disassemble the carrying trolley 4.

[0067] After placing the carrying trolley 4 on the steel grating plate 203, installing the separation unit 5 and the supporting unit 9, placing the PE pipe 3 on the carrying trolley 4, and pulling the PE pipe 3 into position, installing the jacks 6 on the beam 202, and setting the wooden blocks 7 at the bottom of the jacks 6 to ensure the stability of the whole, the PE pipe 3 is jacked up by the shims 8, the PE pipe 3 and the carrying trolley 4 are separated, and the PE pipe 3 is completely above the top end of the supporting unit 9, at which time the separation unit 5 works and pushes the PE pipe 3 to move itself out of the bottom of the PE pipe 3, and the carrying trolley 4 is removed to complete a cycle of construction. This process can reduce the jacking height of the jacks 6, avoid the safety risk of large-stroke vertical jacking of the PE pipe 3, and when installing double-row PE pipes, the distance between the double-row PE pipes after installation is only 600mm, the pipe carrying trolley 4 is designed ingeniously to meet the transportation requirements in a small space, which saves a lot of manpower and material resources compared with the traditional construction method, improves the operation efficiency of the PE pipe 3 traction, and speeds up the engineering construction progress.

[0068] The above embodiments are only preferred technical solutions of the present application, and should not be regarded as a limitation of the present application. The protection scope of the present application should be the technical solutions recited in the claims, including equivalent replacement solutions of the technical features recited in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present application.

Claims

1. A small trolley for transporting and installing large diameter PE pipes in tunnels, characterized in that: The utility model provides a tunnel pipe conveying device, including setting in the tunnel (1) conveyance trolley (4), the upper support of conveyance trolley (4) has PE pipe (3), the downside of conveyance trolley (4) is equipped with support unit (2), support unit (2) and tunnel (1) fixed connection, support unit (2) includes steel grating (203), conveyance trolley (4) includes first bearing plate (401), both sides of first bearing plate (401) symmetry is equipped with corner frame (402), and first bearing plate (401) is equipped with the first pulley (403) on the corner frame (402) rotation, and the side wall sliding connection of first pulley (403) and steel grating (203) is equipped with the first pulley (403) on the corner frame (402) rotation, The middle part of first bearing plate (401) is equipped with second recess (419), and a plurality of third threaded holes (415) are arranged in the second recess (419), and the disengagement unit (5) is fixedly arranged in the second recess (419), the disengagement unit (5) includes a cylinder body (501), the bottom of the cylinder body (501) is provided with a mounting disc (502), the mounting disc (502) and the third threaded hole (415) are penetrated by a locking pin (10), the cylinder body (501) is penetrated by a jacking column (503), the top of the jacking column (503) is provided with a mounting frame (504), and the mounting frame (504) is provided with a second pulley (505) on the top. Both sides of first bearing plate (401) are respectively provided with first recess (406), and the first recess (406) is provided with an expansion rod (404), one side of the expansion rod (404) is provided with a jacking rod (411), and one side of the corner frame (402) is provided with a fixed plate (414) vertically, and the jacking rod (411) is fixedly connected with the fixed plate (414). The upper part of first recess (406) is provided with a third recess (420), and the first motor (405) is arranged in the third recess (420), the bottom of the first motor (405) is provided with a threaded rod (421), the upper part of the expansion rod (404) is provided with a connecting plate (409), the connecting plate (409) is provided with a second threaded hole (410), and the threaded rod (421) is penetrated in the second threaded hole (410). One side of first recess (406) is provided with a first sliding groove (407), one side of the expansion rod (404) is provided with a T-shaped sliding block (412), the T-shaped sliding block (412) is located in the first sliding groove (407), and two protrusions (413) are arranged on the expansion rod (404) in parallel, a plurality of first threaded holes (408) are arranged in the third recess (420), and the first motor (405) is connected with the third recess (420) through the locking pin (10). The jacking column (503) is raised, the first bearing plate (401) is pushed out from the gap under the PE pipe (3) by the limiting action of the second pulley (505) in the reverse direction, and the conveying work is completed.

2. The small car for transporting and installing large-diameter PE pipes in tunnels according to claim 1, characterized in that: The support unit (2) includes a plurality of vertical plates (201) symmetrically arranged on both sides of the tunnel (1) along the axial direction of the tunnel (1), the opposite two vertical plates (201) are connected by a cross beam (202), and the adjacent two cross beams (202) are connected by a steel grating (203).

3. The small car for transporting and installing large-diameter PE pipes in tunnels according to claim 1, characterized in that: The first load-bearing plate (401) is symmetrically provided with two supporting units (9) on the upper portion, the supporting unit (9) comprises a second load-bearing plate (901), the bottom of the second load-bearing plate (901) is provided with two lock rods (902) in parallel, the lock rod (902) is in threaded connection with a fourth threaded hole (416), the fourth threaded hole (416) is located on the upper portion of the first load-bearing plate (401), the upper portion of the second load-bearing plate (901) is provided with a avoiding slot (903), and the avoiding slot (903) is provided with inclined surfaces (904) on both sides.

4. The small car for transporting and installing large-diameter PE pipes in tunnels according to claim 3, characterized in that: The bottom of the second load-bearing plate (901) is provided with a pad plate (905), the pad plate (905) is provided with a second sliding groove (906) on each side, the lock rod (902) is in sliding connection with the second sliding groove (906), the second sliding groove (906) is internally provided with a fifth threaded hole (907), a lock pin (10) is arranged in the fifth threaded hole (907), the lock rod (902) is provided with two lock rings (908) in parallel on the upper portion, a gap (909) is formed between the two lock rings (908), the gap (909) is matched with the second sliding groove (906) in size, and a nut (910) is fixedly arranged on the upper lock rod (902).

5. The small car for transporting and installing large diameter PE pipe in tunnel according to claim 1, characterized in that: The bottom of the first load-bearing plate (401) is provided with a supporting plate (417), the supporting plate (417) is provided with a plurality of counterbores (422), the upper portion of the corner support (402) is detachably provided with a third motor (418), and the third motor (418) is connected with the first roller (403).

6. The construction method of claim 1 to 5, wherein, The method comprises the following steps: S1, the installation height and position of the supporting unit (2) are set according to the size of the tunnel (1), and the production of the carrying trolley (4) is completed; S2, the vertical plate (201), the cross beam (202) and the steel grating plate (203) are installed according to the axial direction of the tunnel (1); S3, the first load-bearing plate (401) is placed on the steel grating plate (203), and then the installation of other components is completed; S4, the supporting unit (9) is installed on the upper portion of the carrying trolley (4), the PE pipe (3) is hoisted to the upper portion of the carrying trolley (4), a traction mechanism is arranged in the tunnel (1), and the traction mechanism and the end portion of the carrying trolley (4) are connected; S5, the telescopic rod (404) is opened to stretch out the jacking rod (411) outward, so as to avoid interference with the steel grating plate (203), then the first motor (405) is started to adjust the height of the first roller (403), and then the jacking rod (411) is retracted until the first roller (403) is attached to the outer side wall of the steel grating plate (203); S6, after the pipe body (301) is pulled to be close to the designed position by using the traction mechanism, fine adjustment is performed, then wood battens (7) are symmetrically arranged on both sides of the cross beam (202), the jack (6) is fixed on the wood batten (7), the PE pipe (3) is lifted by using the shim iron (8), and then the flange plate (302) is fixed on the PE pipe (3) which has been installed; S7, the first roller (403) is separated from the side wall of the steel grating plate (203), is adjusted to the upper side of the steel grating plate (203), and the first roller (403) as a whole does not interfere with the steel grating plate (203). S8, according to the size of the space on both sides of the PE pipe (3) to select the disengagement unit (5), open the disengagement unit (5) on the side close to the larger space, then jack up the second roller (505), until the first bearing plate (401) is separated from the bottom of the PE pipe (3); S9, repeat the above steps S3~ S8, complete the installation of all PE pipes (3), and then disassemble the transport trolley (4).

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