Double-layer silt geology outdoor pipe network construction method

Abstract

The invention discloses a double-layer silt geology outdoor pipe network construction method, and relates to the technical field of official website installation, and the method comprises the following steps: S1, preparation work: removing overground and underground obstacles in a construction area; adding water into cement and stirring into slurry; s2, preparing a pile, namely drilling a hole for preparing the pile, pouring cement into the hole, and stirring to form the pile; a pile core is inserted before the mixing pile is solidified, and a preset core insertion auxiliary device is used for auxiliary work; digging a pipe ditch; cement is poured into the pile core; s3, a pipe network is installed, specifically, an integral steel-plastic soil grating is laid, and then a mattress layer is laid; an outdoor pipe network is installed according to a preset path; s4, backfilling earthwork: backfilling the earthwork in the pipe ditch; and constructing a road layer structure. The installation method has the effect of improving the installation quality of the outdoor pipe network.

Description

Technical Field

[0001] The present application relates to the technical field of pipe network installation, and in particular to a method for constructing a double-layer silt geological outdoor pipe network. Background Art

[0002] Pipeline network mainly refers to the pipeline system used to transport or distribute water to users in water supply or power supply projects. It is usually buried underground and requires excavation and construction. During engineering construction, there is often silt geology at the project site. Silt geology is a kind of soft soil with strong compressibility, which will cause large settlement.

[0003] After the construction of the pipeline network in silt geology is completed, the soil underneath is prone to compression during long-term use, which may cause uneven settlement of the pipeline network foundation and lead to the risk of pipeline rupture, increasing the subsequent maintenance costs. Therefore, this application proposes a new technical solution. Summary of the invention

[0004] In order to improve the installation quality of outdoor pipe networks, the present application provides a double-layer silt geological outdoor pipe network construction method.

[0005] The present application provides a double-layer silt geological outdoor pipe network construction method, which adopts the following technical solution:

[0006] A double-layer mud geological outdoor pipe network construction method, comprising:

[0007] S1. Preparatory work, including:

[0008] Clear above-ground and underground obstacles in the construction area;

[0009] Cement is mixed with water to form a slurry;

[0010] S2, preparing piles, which includes:

[0011] Drill holes for preparing piles in the construction area after clearing obstacles, and pour and mix cement to form piles;

[0012] Insert the pile core before the mixing pile solidifies, and use the preset core insertion auxiliary device to assist in the process;

[0013] Dig out the trench;

[0014] Pour cement into the pile core;

[0015] S3. Install the pipe network, which includes:

[0016] Lay the integral steel-plastic soil grid inside the trench, and then lay the cushion layer;

[0017] Install the outdoor pipe network according to the preset path;

[0018] S4. Backfilling, which includes:

[0019] Backfill the trench with earth;

[0020] Road layer structure construction.

[0021] Optionally, the core insertion auxiliary device includes an anti-overflow mechanism for preventing cement from overflowing and a discharge mechanism for discharging excess cement, the anti-overflow mechanism includes a surrounding plate, the surrounding plate is a hollow conical structure and is open at both ends, the smaller open end of the surrounding plate faces downward and is connected to the top of the mixing pile pipe wall; the discharge mechanism includes a discharge pipe and a sealing cover, the side wall of the surrounding plate is provided with a discharge hole along its thickness direction, the discharge hole is close to the smaller open end of the surrounding plate, the discharge pipe is connected to the discharge hole, the sealing cover is arranged at the outer port of the discharge pipe, the outer wall of the discharge pipe is provided with a thread, and the sealing cover is threadedly connected to the discharge pipe.

[0022] Optionally, a clamping block 1 is extended upward from the pipe wall of the larger open end of the enclosure, a height connecting casing is clamped at the top of the enclosure, a clamping groove is excavated at one end of the height connecting casing along its height direction, the clamping groove corresponds to the clamping block 1, and a clamping block 2 corresponding to the clamping groove is extended from the other end of the height connecting casing, the height connecting casing is divided into two sub-components along the plane where the central axis is located, and the sub-components are arc-shaped when viewed from above, and the two adjacent groups of height connecting casings are clamped together.

[0023] Optionally, a limiting block is extended outward at the end of one sub-component in the same height-connecting casing, and a limiting groove corresponding to the limiting block is dug at the end of another sub-component, the limiting groove is open at the upper end and the outer end, and the limiting block is clamped in the limiting groove.

[0024] Optionally, fixing grooves are dug along the thickness direction of the two sub-components near the ends. After the sub-components are spliced ​​into a circular ring, fixing blocks are connected to the outer sides of the two sub-components. The fixing blocks are rectangular and have both sides folded toward the high casing. The folded sections correspond to the fixing grooves, and both sides of the same fixing block are simultaneously clamped in the adjacent fixing grooves of the two sub-components.

[0025] Optionally, a leveling section is formed by extending the inner edge of the lower end of the enclosure toward the center, and a suction mechanism is provided in the leveling section, the suction mechanism includes a piston and a pull rod, and the leveling section is annular in plan view; a section of the leveling section near the mixing pile is a hollow structure, a suction hole is provided at the bottom of the side wall of the leveling section, and the suction hole is connected to the internal cavity of the leveling section, the piston is annular in plan view, and abuts against the inner wall of the leveling section, and the suction hole is blocked when the piston is at the bottom; a pull rod extends upward from the top of the piston, a through hole is provided at the top of the leveling section, the pull rod is penetrated through the through hole, there are at least two pull rods and through holes, and the top of the leveling section is a detachable structure.

[0026] Optionally, it also includes a pulling mechanism for pulling the pull rod, the pulling mechanism includes a ring and a supporting bone rod, the ring is fixed to the top of the pull rod, one end of the supporting bone rod is rotatably connected to the outer wall of the top end of the enclosure, and the other end is provided with a groove wheel, the rotation center position of the supporting bone rod is higher than the enclosure, and the ring is tied with a pull rope that bypasses the groove wheel.

[0027] Optionally, the pulling mechanism also includes a pedal assembly, which includes a pedal, a spring and a base. The pedal is rotatably connected to a section of the base, the spring is arranged between the pedal and the base, the end of the spring close to the pedal causes the pedal to tilt, and the tilted end of the pedal is used to connect a pull rope. A telescopic rod is provided on the side walls of the pedal and the base, a sliding groove is provided on the side wall of the pedal, a slider is slidably connected in the sliding groove, one end of the telescopic rod is connected to the slider, and the other end is rotatably connected to the base plate.

[0028] To summarize, the present application includes the following beneficial technical effects: by drilling holes in silt geology and pouring cement into the holes for mixing, the hardness of the mixed piles can be increased after the cement solidifies. The pile core is placed in the mixing pile before it solidifies, and cement is poured into the pile core, which greatly increases the strength of the mixing pile, thereby effectively preventing the risk of settlement that may be caused by silt geology and improving the quality of outdoor pipe network installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a flowchart of the steps of this application;

[0030] Figure 2 It is a schematic diagram of the overall structure of the core insertion auxiliary device in this application;

[0031] Figure 3 It is a top view of the high casing in this application;

[0032] Figure 4 is a cross-sectional view of the enclosure in the present application;

[0033] Figure 5 It is a structural schematic diagram of the pedal assembly in this application.

[0034] Explanation of the accompanying drawings: 1. Anti-overflow mechanism; 2. Discharge mechanism; 3. Suction mechanism; 4. Pulling mechanism; 5. Pedal assembly; 11. Enclosure; 12. Clamping block one; 13. Heightening casing; 131. Clamping block two; 132. Limiting block; 133. Fixing block; 21. Discharge pipe; 22. Sealing cover; 31. Leveling section; 32. Piston; 33. Pull rod; 41. Ring; 42. Support bone rod; 43. Groove wheel; 51. Pedal; 52. Spring; 53. Base; 54. Telescopic rod. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-5This application is described in further detail.

[0036] The embodiment of the present application discloses a method for constructing a double-layer silt geological outdoor pipe network.

[0037] Reference Figure 1 The double-layer silt geological outdoor pipe network construction method includes the following steps:

[0038] S1. Preparatory work, including:

[0039] Clear the ground and excavate the foundation in the construction area, and remove underground obstacles; obstacles on the ground or underground during construction will affect the construction quality, and a rotary drilling rig can be used to remove underground obstacles.

[0040] Add cement and water and mix them into slurry. Prepare the cement slurry in advance for later use.

[0041] S2, preparing piles, which includes:

[0042] In the construction area where obstacles have been cleared, holes prepared for pile construction are drilled, and cement is poured in and mixed to form mixing piles. Mixing cement and silt soft soil will make it stronger after solidification, thereby increasing the stability and hardness of the mixing piles.

[0043] The pile core is inserted before the mixing pile solidifies, and the preset core insertion auxiliary device is used to assist in the insertion of the pile core during the process; before inserting the pile core, part of the structure of the core insertion auxiliary device is first fixed on the pipe wall of the mixing pile, and then the core insertion work is carried out. Among them, the core pile can be inserted within 30 minutes before the initial setting of the cement mixing pile. After the core pile head is dug out, a steel support plate, spiral stirrups, and core sealing are placed in the core pile, which improves the friction and bonding force in the pile core, enhances the strength and stability of the mixing pile and the bearing capacity of the foundation, and reduces the risk of water seepage.

[0044] A trench is dug in the piling area, wherein the position of the trench may be simulated in advance using three-dimensional software.

[0045] Pouring cement into the core pile can further enhance the firmness of the mixing pile.

[0046] S3. Install the pipe network, which includes:

[0047] An integral steel-plastic soil grid is laid on the inner side of the trench, and then a cushion layer is laid. Laying steel-plastic geogrid can greatly improve the integrity and bearing capacity of the foundation. In the silt geological treatment, the cushion layer construction process is added, which can disperse the load acting on the road more evenly into the soil, thereby increasing the bearing capacity while reducing the load per unit area of ​​soil, improving soil performance, and increasing the overall stiffness and durability of the foundation.

[0048] Install the outdoor pipe network according to the preset path.

[0049] S4. Backfilling, which includes:

[0050] The trench is backfilled with earth, which can be backfilled in two times.

[0051] Road layer structure construction.

[0052] Through the above steps, four processes are used in combination for cement mixing pile construction, core pile construction, laying of integral steel-plastic geogrid and laying of cushion layer, so that the soft soil foundation of outdoor pipe network can meet the corresponding design bearing capacity requirements, reduce the difficulty of soft soil foundation treatment and ensure the construction quality. Mixing cement into the mixing pile greatly improves the firmness of the pile body after the pile is formed and improves the stability of the pile body.

[0053] The cement in S2 is poured and stirred to form a mixing pile. When the cement is stirred, a four-stirring and four-spraying process is used to form the cement mixing pile. The four-spraying and four-stirring process is that the mixer drill rod rotates and sinks while spraying. After sinking to the designed depth, the spraying is reversed to lift the top of the pile. The mixer drill rod is again sprayed and rotated to sink to the bottom of the pile. When the drill rod sinks to the bottom of the pile, the spraying and stirring are lifted to the top of the pile. This process is repeated twice to complete four sprayings and four stirrings. The mixer is a machine used in the prior art and will not be described here. The mixing pile uses this process for stirring, and spraying is performed directly during the stirring and sinking, which increases the mixing ratio of the soil layer and cement and other materials, and improves the stability of the soft soil foundation.

[0054] Reference Figure 2 The core insertion auxiliary device includes an anti-overflow mechanism 1 and a discharge mechanism 2. The anti-overflow mechanism 1 includes a panel 11. The panel 11 is a hollow truncated cone structure with openings at both ends. The smaller opening end of the panel 11 faces downward and is inserted into the top of the mixing pile pipe wall. The smaller opening end of the panel 11 is provided with a groove inwardly along the vertical direction, and the mixing pile pipe wall is clamped in the groove. A rubber ring is provided in the groove, and the rubber ring contacts the mixing pile pipe wall. The discharge mechanism 2 includes a discharge pipe 21 and a cover 22. The enclosure 11 is provided with a discharge hole along the thickness direction of its side wall. The discharge hole is located close to the bottom of the enclosure 11, that is, the smaller opening end of the enclosure 11. The discharge pipe 21 is connected to the discharge hole. The discharge pipe 21 extends downward and the outer wall of the discharge pipe 21 is provided with a thread. The cover 22 is covered on the outer port of the discharge pipe 21. The inner wall of the cover 22 is provided with a threaded structure corresponding to the thread on the outer wall of the discharge pipe 21. The cover 22 is threadedly connected to the discharge pipe 21, wherein the cover 22 can be disposable for easy replacement.

[0055] According to the above structure, the enclosure 11 can be set to collect the cement overflowed during the core insertion into the enclosure 11, and then the cement collected in the enclosure 11 can be discharged through the discharge pipe 21. The enclosure 11 is clamped on the wall of the mixing pile, which is convenient for disassembly and cleaning of the enclosure 11. A layer of rubber ring is set in the groove for clamping. Since the rubber ring can be compressed, the enclosure 11 and the wall of the mixing pile can be fixed more firmly during clamping, and the wear caused by squeezing between the two can be reduced. Since cement will solidify, the discharge pipe 21 and the cover 22 are set to be threaded, which is convenient for disassembly and replacement of the cover 22, and effectively avoids the cover 22 being sealed by cement, resulting in the discharge pipe being unable to smoothly discharge excess cement.

[0056] Reference Figure 2 , the pipe wall of the larger open end of the enclosure 11 extends upward with a clamping block 12, and the top of the enclosure 11 is clamped with a height-connecting casing 13, and one end of the height-connecting casing 13 is dug with a clamping groove along its height direction, and the clamping groove corresponds to the clamping block 12; when too much cement overflows, the height-connecting casing 13 can be added to block the overflowed cement, and the clamping block 12 on the enclosure 11 can be clamped with the clamping groove at the end of the height-connecting casing 13 and fix the height-connecting casing 13 and the enclosure 11. The top of the height-connecting casing 13 extends with a clamping block 2 131 corresponding to the clamping groove at the bottom of the height-connecting casing 13, and the clamping block 2 131 can be clamped in the clamping groove. When the overflowing cement is about to overflow the height-connecting casing 13, the height-connecting casing 13 can be added to continue fixing.

[0057] The heightening casing 13 is divided into two sub-components along the plane where the central axis is located, and the sub-components are arc-shaped when viewed from above. The two adjacent heightening casings 13 are clamped together. When the core pile is inserted, cement continuously overflows. The combination and installation of the two sub-components can avoid obstruction of the heightening casing 13 due to the excessive length of the core pile.

[0058] Reference Figure 2 and Figure 3 The end of one of the sub-components extends outward with a limit block 132, which can be a rectangular parallelepiped with the end folded outward or an irregular sawtooth shape. The end of the other sub-component is provided with a limit groove corresponding to the limit block 132, and the limit block 132 is clamped in the limit groove, and the limit block 132 abuts against the side wall of the limit groove. This structure is convenient for the sub-components to be spliced ​​to form the high casing 13, and the ends of the sub-components are not flat structures, and the gap formed after splicing is not a straight line, which can effectively reduce the overflow of cement through the gap.

[0059] The outer walls of the two sub-components are provided with fixing grooves along the thickness direction near the ends. When the two sub-components are spliced, fixing blocks 133 are clamped in two adjacent fixing grooves. The fixing blocks 133 are rectangular and have both sides folded toward the heightened casing 13. The folded sections on both sides of the same fixing block 133 correspond to the fixing grooves and are clamped in the fixing grooves.

[0060] Reference Figure 2 and Figure 4 The lower end inner edge of the enclosure 11 extends toward the center to form a leveling section 31, and a suction mechanism 3 is provided in the leveling section 31. The suction mechanism 3 includes a piston 32 and a pull rod 33. The leveling section 31 is located at the smaller opening end of the enclosure 11 and below the discharge hole. The leveling section 31 is annular in plan view. The leveling section 31 is a hollow structure inside, and a suction hole is provided on the side wall of the leveling section 31. The suction hole is connected to the internal cavity of the leveling section 31, so that the cement overflowed when the core pile is inserted can enter the internal cavity of the leveling section 31 through the suction hole. The piston 32 is located in the internal cavity of the leveling section 31, and the piston 32 is annular in plan view. The side wall of the piston 32 contacts the inner wall of the leveling section 31. When the piston 32 is at the bottom, the suction hole can be blocked. When there is no need to suck cement, the cement directly enters the leveling section 31 through the suction hole.

[0061] A pull rod 33 extends upward from the top of the piston 32, and a through hole is provided at the top of the leveling section 31 for the pull rod 33 to pass through. There are at least two pull rods 33 and through holes, and a rubber pad is adhered to the inside of the through hole, which can seal the through hole and the pull rod 33 to prevent cement from entering the cavity of the leveling section 31 through the through hole when the cement overflows to the top of the leveling section 31. At the same time, the rubber pad is relatively soft and will not hinder the movement of the pull rod 33. The cement in the enclosure 11 can be discharged through the discharge hole and the discharge pipe 21, but since the discharge hole may not necessarily be dug at the bottom of the enclosure 11, it is difficult to drain the cement in the enclosure 11. Therefore, the suction mechanism 3 is designed. When there is residual cement that has not been drained in the enclosure 11, the pull rod 33 can be pulled to suck the remaining cement, thereby assisting in draining the cement in the enclosure 11.

[0062] The top plate at the top of the cavity in the leveling section 31 is a detachable structure and can be fixed by snaps. After the enclosure 11 is used, the top plate is removed to facilitate cleaning of the inside of the leveling section 31 and prevent cement from solidifying on the inner wall of the leveling section 31 and affecting subsequent use.

[0063] Reference Figure 2 and Figure 4, and also includes a pulling mechanism 4 for pulling the pull rod 33. The pulling mechanism 4 includes a ring 41 and a support bone rod 42. The ring 41 is fixed to the top of the pull rod 33. The support bone rod 42 is hinged to the outer wall of the top end of the enclosure 11. The end of the support bone rod 42 away from the enclosure 11 is provided with a groove wheel 43. The support bone rod 42 is fixed to the groove wheel seat of the groove wheel 43, which can be fixed by bolts and nuts. The groove wheel 43 is rotatably connected in the groove wheel seat. One end of the pull rope is tied to the ring 41 and bypasses the groove wheel 43. When the pile core is inserted, the support bone rod 42 can be rotated to the outside of the enclosure 11 to support the enclosure 11. The rotation center position of the support bone rod 42 is higher than the enclosure 11. The support bone rod 42 can be rotated so that the groove wheel 43 is located above the internal cavity of the enclosure 11. The pulling direction of the pull rope is changed through the groove wheel 43, so that the pull rod 33 can be easily pulled, and there is no need to put the hand into the enclosure 11 to pull the pull rod 33.

[0064] Reference Figure 5 The pulling mechanism 4 further includes a pedal assembly 5, which includes a pedal 51, a spring 52 and a base 53. The pedal 51 is hinged to one end of the base 53, and the spring 52 is installed between the pedal 51 and the base 53. The end of the spring 52 close to the pedal 51 causes the pedal 51 to tilt up, and the tilted end of the pedal is used to connect the pull rope. When the pedal 51 is not stepped on, the spring 52 is in a natural state. The pull rope is tied to the end of the pedal 51, and a fixing member for tying the pull rope can be set at the end of the pedal 51. When the pedal 51 is stepped on, the spring 52 is compressed, and the pull rope passes through the groove wheel 43 and pulls the pull rod 33 up through the ring 41, so that pulling the pull rod 33 is more convenient. When there is no need to pull the pull rod 33, the spring 52 can restore the pedal 51 to its original state.

[0065] A telescopic rod 54 is provided on the side walls of the pedal 51 and the base 53. A sliding groove is opened on the side wall of the pedal 51, and a slider is slidably connected in the sliding groove. One end of the telescopic rod 54 is rotatably connected to the slider, and the other end is rotatably connected to the base 53. When the spring 52 is compressed, the telescopic rod 54 is also compressed. When the spring 52 rebounds, the telescopic rod 54 is elongated and a limit is provided inside the telescopic rod 54, which can limit the maximum distance between the open ends of the pedal 51 and the base 53 within a certain range, and at the same time play a role in enhancing strength.

[0066] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A double-layer mud geological outdoor pipe network construction method, characterized in that: include: S1. Preparatory work, including: Clear above-ground and underground obstacles in the construction area; Cement is mixed with water to form a slurry; S2, preparing piles, which includes: Drill holes for preparing piles in the construction area after clearing obstacles, and pour and mix cement to form piles; The pile core is inserted before the mixing pile solidifies, and the pre-set core insertion auxiliary device is used to assist in the insertion of the pile core during the process; Dig a trench in the piling area; Pour cement into the pile core; S3. Install the pipe network, which includes: Lay the integral steel-plastic soil grid inside the trench, and then lay the cushion layer; Install the outdoor pipe network according to the preset path; S4. Backfilling, which includes: Backfill the trench with earth; Road layer structure construction.

2. The double-layer mud geological outdoor pipe network construction method according to claim 1 is characterized in that: The core insertion auxiliary device comprises an anti-overflow mechanism (1) for preventing cement from overflowing and a discharge mechanism (2) for discharging excess cement. The anti-overflow mechanism (1) comprises a panel (11), the panel (11) is a hollow truncated cone structure and is open at both ends. The smaller open end of the panel (11) faces downward and is connected to the top of the mixing pile pipe wall. The discharge mechanism (2) comprises a discharge pipe (21) and a cover (22). A discharge hole is provided on the side wall of the panel (11) along its thickness direction. The discharge hole is close to the smaller open end of the panel (11). The discharge pipe (21) is connected to the discharge hole. The cover (22) is arranged on the outer end of the discharge pipe (21). The outer wall of the discharge pipe (21) is provided with a thread. The cover (22) is threadedly connected to the discharge pipe (21).

3. The double-layer mud geological outdoor pipe network construction method according to claim 2 is characterized in that: A clamping block 1 (12) is extended upward from the pipe wall of the larger open end of the enclosure (11), and a height-connecting casing (13) is clamped at the top of the enclosure (11). A clamping groove is excavated at one end of the height-connecting casing (13) along its height direction, and the clamping groove corresponds to the clamping block 1 (12). A clamping block 2 (131) corresponding to the clamping groove is extended from the other end of the height-connecting casing (13). The height-connecting casing (13) is divided into two sub-components along the plane where the central axis is located, and the sub-components are arc-shaped when viewed from above, and two adjacent groups of the height-connecting casing (13) are clamped together.

4. The double-layer mud geological outdoor pipe network construction method according to claim 3 is characterized in that: A limiting block (132) is extended outward at the end of one sub-component in the same height-connecting casing (13), and a limiting groove corresponding to the limiting block (132) is excavated at the end of another sub-component. The limiting groove is open at the top and the outer end, and the limiting block (132) is snap-connected to the limiting groove.

5. The double-layer mud geological outdoor pipe network construction method according to claim 4 is characterized in that: The two sub-components are provided with fixing grooves along their thickness direction at positions near the ends. The two sub-components are spliced ​​and connected to the outside with a fixing block (133). The fixing block (133) is in the form of a rectangular parallelepiped and has two sides folded toward the high casing (13). The folded section corresponds to the fixing groove. The two sides of the same fixing block (133) are simultaneously clamped in the adjacent fixing grooves of the two sub-components.

6. The double-layer mud geological outdoor pipe network construction method according to claim 2 is characterized by: The lower end inner edge of the enclosure (11) extends toward the center to form a leveling section (31), and a suction mechanism (3) is provided in the leveling section (31), and the suction mechanism (3) includes a piston (32) and a pull rod (33). The leveling section (31) is annular in plan view; a section of the leveling section (31) near the mixing pile is a hollow structure, and a suction hole is provided at the bottom of the side wall of the leveling section (31), and the suction hole is connected to the leveling section (31). The piston (32) is annular in shape when viewed from above and contacts the inner wall of the leveling section (31). When the piston (32) is at the bottom, the suction hole is blocked. A pull rod (33) extends upward from the top of the piston (32). A through hole is provided at the top of the leveling section (31). The pull rod (33) passes through the through hole. There are at least two pull rods (33) and through holes. The top of the cavity in the leveling section (31) is a detachable structure.

7. The double-layer mud geological outdoor pipe network construction method according to claim 6 is characterized by: It also includes a pulling mechanism (4) for pulling the pull rod (33), the pulling mechanism (4) including a ring (41) and a supporting bone rod (42), the ring (41) is fixed to the top of the pull rod (33), one end of the supporting bone rod (42) is rotatably connected to the outer wall of the top end of the enclosure (11), and the other end is provided with a groove wheel (43), the rotation center position of the supporting bone rod (42) is higher than the enclosure (11), and the ring (41) is tied with a pull rope that bypasses the groove wheel (43).

8. The double-layer mud geological outdoor pipe network construction method according to claim 7 is characterized by: The pulling mechanism (4) further comprises a pedal assembly (5), the pedal assembly (5) comprising a pedal (51), a spring (52) and a base (53), the pedal (51) being rotatably connected to a section of the base (53), the spring (52) being arranged between the pedal (51) and the base (53), the end of the spring (52) close to (51) causing the pedal (51) to tilt up, the tilted end of the pedal (51) being used to connect a pull rope, a telescopic rod (54) being arranged on the side walls of the pedal (51) and the base (53), a sliding groove being arranged on the side wall of the pedal (51), a slider being slidably connected in the sliding groove, one end of the telescopic rod (54) being connected to the slider, and the other end being rotatably connected to the base plate.

Images