A method for laying NPR steel mesh in the surface layer of highways with deep soft soil

Abstract

This invention relates to the field of road base course design and discloses a novel NPR (Non-Resistant Petroleum Reinforcing Mesh) reinforcement mesh layout method for the surface course of highways with deep soft soil. The method includes the following steps: S1: Drilling holes at designated ground locations down to the rock layer, simultaneously excavating rectangular pits of a specified size at the top of the holes, and excavating connecting channels between multiple rectangular pits; S2: Compacting and hardening the entire surface, and simultaneously laying crushed stone for base course treatment; S3: Selecting steel bars of a specified specification and welding them into unit strip-shaped reinforcement meshes. This invention increases the contact area, reduces unit pressure, and adds different reinforcement meshes, with each mesh interconnected. This further reduces unit pressure while ensuring uniform overall stress distribution, preventing excessive local collapse, thereby reducing later maintenance costs, minimizing landslides or leaks, and increasing overall safety.

Description

Technical Field

[0001] This invention relates to the field of road base design, and in particular to a method for laying NPR steel mesh in the surface layer of a highway with deep soft soil. Background Technology

[0002] This generally refers to an unstable foundation beneath the road surface, causing partial subsidence of the road surface. Highways passing through soft soil sections typically undergo base reinforcement during the initial construction phase, especially for thicker soft soil surfaces. Existing treatment methods vary depending on the specific foundation. For example, a steel mesh structure is generally used, followed by cement hardening. While this method largely adapts to existing ground conditions, it presents challenges for later maintenance, is costly, and still has some shortcomings in overall safety. Summary of the Invention

[0003] To address the technical problem of high maintenance costs in the later stages, this invention provides a method for laying NPR steel mesh in the surface layer of highways with deep soft soil.

[0004] This invention is achieved using the following technical solution: a method for laying NPR steel mesh in the surface layer of a highway with deep soft soil, comprising the following steps:

[0005] S1: Drill holes at the specified ground location down to the rock layer, and at the same time dig rectangular pits of the specified size at the top of the holes, and dig connecting channels between multiple rectangular pits;

[0006] S2: The entire plane is compacted and hardened, and crushed stone is laid at the same time to treat the base layer;

[0007] S3: Select the specified steel bars and weld them into unit strip-shaped steel mesh for enclosure;

[0008] S4: Place the unit strip of steel mesh into the hole position, and at the same time lay multiple crisscrossing steel meshes on the rectangular pit, and weld them to the steel meshes set vertically in the hole;

[0009] S5: Lay a steel mesh in the connecting channel and weld it to the steel mesh in the rectangular pit;

[0010] S6: Lay multiple parallel steel meshes in the direction of road travel, and lay vertical steel meshes between the multiple parallel steel meshes, while welding them simultaneously.

[0011] The steel mesh includes transverse meshes, with a longitudinal mesh connecting two transverse meshes. A rectangular mesh is connected to the bottom of the transverse meshes, and connecting mesh one and connecting mesh two are connected between two rectangular meshes. A vertical mesh extending underground is connected to the bottom of the rectangular meshes.

[0012] As a further improvement to the above scheme, the rectangular mesh, horizontal mesh, connecting mesh one, longitudinal mesh, vertical mesh, and connecting mesh two are all composed of a single set of mesh columns. The single set of mesh columns includes multiple vertical steels, and multiple ring steels are welded to the outer wall of the vertical steels. Multiple auxiliary steels are connected between two vertical steels. The single set of mesh columns is assembled by an auxiliary device.

[0013] As a further improvement to the above scheme, the rectangular pit adopts a 5*5m square pit, and the width of the connecting channel is not less than 1.5m.

[0014] As a further improvement to the above solution, the auxiliary device includes: a lower cover with multiple support rods fixedly connected thereto, and an upper cover connected to the top of the support rods; a moving component fixedly connected to the upper cover, with the vertical steel penetrating through the moving component; a welding component with adjusting components connected to both sides, the adjusting components cooperating with a limiting sleeve; a friction component fixedly connected to the lower cover and cooperating with the vertical steel; a pusher fixedly connected to the support rods, with a contact block connected to its output end; and a support frame with a pneumatic cylinder fixedly connected thereto, the output of the pneumatic cylinder being fixedly connected to the lower cover.

[0015] As a further improvement to the above solution, the welding assembly includes: a movable frame, which is fixedly connected to the adjustment assembly, and a rotating ring is rotatably connected to the middle of the movable frame; a power assembly one, which is fixedly connected to the rotating ring, and its output end is driven by a rotating shaft fixedly connected to the movable frame, the rotating shaft being rotatably connected to the rotating ring, and the output end of the power assembly one being driven by a threaded rod rotatably connected to the rotating ring; a rotating ball, which is rotatably connected to the rotating ring, and a telescopic rod three is fixedly connected to its middle, the outer wall of the telescopic rod three being rotatably fitted with the rotating ring, and a movable block that helically engages with the threaded rod being rotatably connected to one side of the rotating ring; a limiting frame, which is fixedly connected to the output of the telescopic rod three, and a welding device is rotatably connected to the other end of the limiting frame, a telescopic rod two is rotatably connected to one side of the limiting frame, and a steering block that is slidably connected to the limiting frame is rotatably connected to the output end of the telescopic rod two.

[0016] As a further improvement to the above solution, the adjustment component includes: a limiting box, which is fixedly connected to the movable frame, and a power component three is fixedly connected to its bottom. The output end of the power component three is connected to a rolling shaft, and a contact wheel is fixedly sleeved on the outer wall of the rolling shaft. The contact wheel is in contact with the support rod; and a telescopic rod three, which is fixedly connected to the limiting box, and a pressure plate is connected to its output end. The pressure plate is in contact with the support rod.

[0017] As a further improvement to the above solution, the moving component includes: a limiting sleeve, which is fixedly connected to the upper cover and has multiple drive rings rotatably connected thereto; a mounting box, which is fixedly connected to the upper cover and has a power component two fixedly connected to one side thereto, the output end of the power component two being driven by a transmission component, one end of the transmission component being fixedly sleeved with a drive wheel that meshes with the drive rings; and a moving shaft, with moving blocks rotatably connected to both ends of which are slidably sleeved with the limiting sleeve, springs fixedly connected to both sides of the moving blocks and fixedly connected to the limiting sleeve, and a pressure ring fixedly sleeved on the outer wall of the moving shaft.

[0018] As a further improvement to the above solution, a receiving groove is provided inside the limiting sleeve, the moving block is located inside the receiving groove, the limiting sleeve is provided with a sliding cavity, and the pressure ring moves inside the sliding cavity.

[0019] As a further improvement to the above solution, the friction assembly includes: a restraint frame, which is fixedly connected to the lower cover, and a plurality of telescopic rods are fixedly connected to one side of the restraint frame. The output end of the telescopic rod is connected to a pushing arc, and a pressure sleeve that contacts the vertical steel is sleeved inside the pushing arc; a high-pressure pump, which is fixedly connected to the restraint frame, and an air pipe connected to the pressure sleeve is connected to its output end.

[0020] As a further improvement to the above solution, a functional box is fixedly connected to the lower cover, a snap-fit ​​groove is provided on the support rod, and snap-fit ​​holes are provided on the upper and lower covers. The support rod is fixed to the upper and lower covers by pins.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] 1. By hardening the ground and laying rectangular mesh, the contact area is increased, the unit pressure is reduced, and different steel meshes are added and connected to each other. This also reduces the unit pressure and makes the overall stress uniform, avoiding local excessive collapse, thereby reducing the later maintenance cost, reducing the occurrence of landslides or leaks, and increasing the overall safety.

[0023] 2. With the help of the auxiliary device, multi-location simultaneous unit construction can be carried out, reducing the transportation of large base materials, reducing the use of large machinery, reducing the risk factor in construction, while facilitating the overall installation needs, increasing construction efficiency, and adapting to the progress of the work. Attached Figure Description

[0024] Figure 1 This is a top view schematic diagram of the steel mesh connection of the present invention;

[0025] Figure 2 This is a schematic diagram of the steel mesh connection of the present invention;

[0026] Figure 3 This is a top view diagram of the steel mesh;

[0027] Figure 4 This is a schematic diagram of the auxiliary device from the front view sectional view.

[0028] Figure 5 This is a top-view sectional diagram of the auxiliary device;

[0029] Figure 6 This is a partial front view sectional diagram of the auxiliary device;

[0030] Figure 7 A schematic diagram of the main sectional view of the auxiliary friction mechanism;

[0031] Figure 8 This is a partial top-view sectional view of the auxiliary device;

[0032] Figure 9 for Figure 8 Enlarged structural diagram at point A;

[0033] Figure 10 This is a top-view cross-sectional diagram of the adjustment component.

[0034] Explanation of key symbols:

[0035] 01. Rectangular mesh; 02. Auxiliary steel; 03. Horizontal mesh; 04. Connecting mesh one; 05. Longitudinal mesh; 06. Vertical mesh; 07. Connecting mesh two; 08. Ring steel; 09. Vertical steel; 11. Top cover; 12. Limiting sleeve; 14. Contact block; 15. Support frame; 16. Pneumatic cylinder; 17. Bottom cover; 19. Adjusting assembly; 20. Pusher; 21. Support rod; 22. Telescopic rod one; 23. Threaded rod; 24. Rotating ring; 25. Rotating shaft; 26. Moving block; 27. Rotating ball; 28. Limiting frame; 29. ​​Telescopic rod two; 30. 31. Power Component 1; 32. Telescopic Rod 3; 33. Welder; 34. Rotating Ring; 35. Moving Frame; 36. Pressure Sleeve; 37. High-Pressure Pump; 38. Restraint Frame; 39. Push Arc; 40. Air Pipe; 41. Function Box; 42. Drive Ring; 43. Mounting Box; 44. Transmission Component; 45. Power Component 2; 46. Drive Wheel; 47. Moving Block; 48. Spring; 49. Pressure Ring; 50. Moving Shaft; 51. Limiting Box; 52. Power Component 3; 53. Telescopic Rod 3; 54. Pressure Plate; 55. Rolling Shaft; 56. Contact Wheel. Detailed Implementation

[0036] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0037] Example 1

[0038] Please combine Figure 1-10,

[0039] A method for laying NPR (Non-Reinforcing Mesh) in the surface layer of a highway with deep soft soil includes the following steps:

[0040] S1: Drill holes at the specified ground location down to the rock layer, and at the same time dig a rectangular pit of the specified size at the top of the hole, and dig a connecting channel between multiple rectangular pits to carry out base drilling to ensure subsequent stability. At the same time, the rectangular pits are used to ensure the contact area with the ground.

[0041] S2: The entire plane is compacted and hardened, and crushed stone is laid at the same time to treat the base layer. The base layer is then compacted and hardened to ensure the subsequent paving can proceed.

[0042] S3: Select the specified steel bars and weld them into unit strip-shaped steel mesh for the enclosure. The steel mesh bears the unit force to ensure subsequent work.

[0043] S4: Place the unit strip of steel mesh at the hole position, and at the same time lay multiple crisscrossing steel meshes on the rectangular pit, and weld them with the steel meshes set vertically in the hole. Laying multiple steel meshes achieves multiple stress.

[0044] S5: Lay a steel mesh in the connecting channel and weld it to the steel mesh in the rectangular pit;

[0045] S6: Lay multiple parallel steel meshes in the direction of road travel, lay vertical steel meshes between the multiple parallel steel meshes, and weld them at the same time. Lay multiple steel meshes to achieve multiple stresses, and finally lay cement to meet the laying requirements.

[0046] The steel mesh is laid in the following way: a horizontal mesh 03 is laid horizontally, a vertical mesh 05 is connected between two horizontal meshes 03, a rectangular mesh 01 is connected to the bottom of the horizontal mesh 03, a connecting mesh 1 04 and a connecting mesh 2 07 are connected between two rectangular meshes 01, and a vertical mesh 06 extending underground is connected to the bottom of the rectangular mesh 01. The rectangular mesh 01 increases the area of ​​support, the vertical mesh 06 provides support, and the vertical mesh 05, connecting mesh 1 04 and horizontal mesh 03 are connected to form a mesh to ensure the stress-bearing area.

[0047] Rectangular mesh 01, horizontal mesh 03, connecting mesh one 04, vertical mesh 05, vertical mesh 06, and connecting mesh two 07 are all composed of a single set of mesh posts. A single set of mesh posts includes multiple vertical steels 09. Multiple ring steels 08 are welded to the outer wall of the vertical steels 09. Multiple auxiliary steels 02 are connected between two vertical steels 09. A single set of mesh posts is assembled by an auxiliary device. The vertical steels 09 and ring steels 08 bear the main force, while the auxiliary steels 02 provide tension to ensure the needs of the operation.

[0048] The rectangular pit uses a 5*5m square pit, and the width of the connecting channel is not less than 1.5m.

[0049] The auxiliary device includes: a lower cover 17, on which multiple support rods 21 are fixedly connected. The top of the support rods 21 is connected to an upper cover 11. The lower cover 17 is connected to the upper cover 11 through the support rods 21 to ensure the operation. A moving component is fixedly connected to the upper cover 11. A vertical steel 09 passes through the moving component, which ensures the movement of part of the device. A welding component has adjusting components 19 connected to both sides. The adjusting components 19 cooperate with the limiting sleeve 12. The welding component performs welding work. A friction component is fixedly connected to the lower cover 17 and cooperates with the vertical steel 09. The friction component ensures the limited operation of the device. A pusher 20 is fixedly connected to the support rods 21. Its output end is connected to a contact block 14. The pusher 20 provides power to move the contact block 14 to achieve bending work. A support frame 15 has a pneumatic cylinder 16 fixedly connected to it. The output of the pneumatic cylinder 16 is fixedly connected to the lower cover 17. The support frame 15 provides support, and the pneumatic cylinder 16 performs a certain height adjustment.

[0050] The welding assembly includes: a movable frame 34, which is fixedly connected to the adjusting assembly 19; a rotating ring 24 is rotatably connected to the middle of the movable frame 34; the movable frame 34 provides limiting support; the rotating ring 24 can rotate within the movable frame 34 to adapt to the working position; a power assembly 30, which is fixedly connected to the rotating ring 24; its output end is driven by a rotating shaft 25 fixedly connected to the movable frame 34; the rotating shaft 25 is rotatably connected to the rotating ring 24; the output end of the power assembly 30 is driven by a threaded rod 23 rotatably connected to the rotating ring 24; the power assembly 30 is an existing mechanism that provides power output and can drive the rotation of the rotating shaft 25 and the threaded rod 23 respectively; and a rotating ball 27, which is rotatably connected to the rotating ring 24; a telescopic rod is fixedly connected to its middle. The telescopic rod 31 has a rotating ring 33 rotatably sleeved on its outer wall. One side of the rotating ring 33 is rotatably connected to a moving block 26 that is screwed into the threaded rod 23. The rotating ball 27 allows the telescopic rod 31 to rotate. At the same time, the rotation of the threaded rod 23 drives the moving block 26 to move, thereby changing the angle of the telescopic rod 31. The limiting frame 28 is fixedly connected to the output of the telescopic rod 31. The other end of the limiting frame 28 is rotatably connected to a welder 32. One side of the limiting frame 28 is rotatably connected to a telescopic rod 29. The output end of the telescopic rod 29 is rotatably connected to a steering block that is slidably connected to the limiting frame 28. Through the limiting of the limiting frame 28 and the operation of the telescopic rod 29, the angle of the welder 32 changes to adapt to different welding methods.

[0051] The adjusting assembly 19 includes: a limiting box 51, which is fixedly connected to the moving frame 34, and a power assembly 52 is fixedly connected to its bottom. The output end of the power assembly 52 is connected to a rolling shaft 55. A contact wheel 56 is fixedly sleeved on the outer wall of the rolling shaft 55. The contact wheel 56 contacts the support rod 21. The limiting box 51 limits and supports the movement. Through the operation of the power assembly 52, the rolling shaft 55 rotates. Further, under the limitation of the support rod 21, the limiting box 51 and the moving frame 34 move to achieve position adjustment. A telescopic rod 53 is fixedly connected to the limiting box 51, and a pressure plate 54 is connected to its output end. The pressure plate 54 contacts the support rod 21. Through the adjustment of the telescopic rod 53, the limiting box 51 cooperates with the moving frame 34 to adapt to the position of the support rods 21 on both sides to ensure the provision of friction.

[0052] The moving assembly includes: a limiting sleeve 12, which is fixedly connected to the upper cover 11, and multiple drive rings 42 are rotatably connected to it. The limiting sleeve 12 limits and guides the entire assembly. The rotation of the drive rings 42 causes the vertical steel 09 to move relative to the upper cover 11. A mounting box 43, which is fixedly connected to the upper cover 11, has a power assembly 45 fixedly connected to one side. The output end of the power assembly 45 is connected to a transmission assembly 44. One end of the transmission assembly 44 is fixedly sleeved with a drive wheel 46 that meshes with the drive rings 42. The mounting box 43 provides support and limitation. A spare battery is installed inside the mounting box 43 in case of power failure. Force component 2 45 provides power to the existing mechanism, which is then transmitted to the drive wheel 46 through the transmission component 44, causing the drive wheel 46 to rotate, which in turn drives the drive ring 42 to rotate, causing the vertical steel 09 to move. The moving shaft 50 has moving blocks 47 rotatably connected to both ends of the moving shaft 50, which are slidably sleeved with the limiting sleeve 12. Springs 48 are fixedly connected to both sides of the moving blocks 47 and fixedly connected to the limiting sleeve 12. A pressure ring 49 is fixedly sleeved on the outer wall of the moving shaft 50. Under the action of the springs 48, the moving blocks 47 and the moving shaft 50 move, thereby causing the pressure ring 49 to press tightly against the vertical steel 09 and maintain a clamping state.

[0053] The limiting sleeve 12 is provided with a receiving groove, the moving block 47 is located in the receiving groove, the limiting sleeve 12 is provided with a sliding cavity, the pressure ring 49 moves in the sliding cavity, the receiving groove provides necessary limitation and reception, and the sliding cavity ensures movement.

[0054] The friction assembly includes: a restraint frame 37, which is fixedly connected to the lower cover 17, and a plurality of telescopic rods 22 are fixedly connected to one side of the restraint frame 37. The output end of the telescopic rods 22 is connected to a pushing arc 38. A pressure sleeve 35 that contacts the vertical steel 09 is sleeved inside the pushing arc 38. The restraint frame 37 limits the position. The telescopic rods 22 extend, causing the pushing arc 38 and the pressure sleeve 35 to move. The pressure sleeve 35 contacts the vertical steel 09, generating friction and limiting the position. A high-pressure pump 36 is fixedly connected to the restraint frame 37. Its output end is connected to an air pipe 39 that is connected to the pressure sleeve 35. Air is pumped into the pressure sleeve 35 through the high-pressure pump 36 and the air pipe 39 to adjust the amount of friction.

[0055] A function box 40 is fixedly connected to the lower cover 17. A snap-fit ​​groove is provided on the support rod 21. Snap-fit ​​holes are provided on the upper cover 11 and the lower cover 17. The support rod 21 is fixed to the upper cover 11 and the lower cover 17 by means of a pin. The function box 40 facilitates the fixing of different devices. The snap-fit ​​groove and snap-fit ​​hole cooperate with the pin to achieve fixation.

[0056] The implementation principle of this application embodiment is as follows:

[0057] Drill holes at designated locations, then cut steel bars to the specified lengths. Place an auxiliary tool over the holes, and then use the tool and manual labor to bind and weld the steel bars to the specified lengths before inserting them into the holes. Simultaneously, around the holes, other workers and auxiliary tools form steel meshes in the specified directions, such as horizontal mesh 03, vertical mesh 05, connecting mesh 04, vertical mesh 06, and rectangular mesh 01. Finally, manual labor is used to bind and weld the various joints to achieve overall load-bearing capacity. Finally, cement and ground substrate are laid to form a road.

[0058] During the use of the auxiliary device, the vertical steel 09 is placed inside the limiting sleeve 12. At this time, the pressure from the spring 48 causes the pressure ring 49 to contact the vertical steel 09, which, in conjunction with the drive ring 42, achieves clamping. Then, the power component 45 is controlled to operate, and through the transmission component 44 and the drive wheel 46, the drive ring 42 rotates, causing the vertical steel 09 to move. At this time, a semi-formed annular steel 08 is placed on the outside of the multiple vertical steels 09. The pusher 20 pushes the contact block 14, causing the contact block 14 to press against the annular steel 08, deforming both ends of the annular steel 08 into a ring shape. At this time, it is bound with wire to achieve the first layer of restraint. Then, during the downward movement, the telescopic rod 22 extends... The extension causes the pushing arc 38 and the pressure sleeve 35 to move. The pressure sleeve 35 contacts the vertical steel 09, generating friction to limit movement and prevent excessive movement. After moving to a certain position, the power component 30 is activated, causing the rotating ring 24 or the threaded rod 23 to rotate. The rotation of the threaded rod 23 drives the movement of the moving block 26 and the rotation of the telescopic rod 31 for further adjustment. Finally, the telescopic rod 29 enables the welder 32 to achieve fine-tuning, determining the welding position for welding. While welding, the upper annular steel 08 can be bent and bound simultaneously, saving time. After welding, the drive ring 42 drives further movement.

[0059] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A method for laying NPR steel mesh in the surface layer of a highway with deep soft soil, characterized in that, Includes the following steps: S1: Drill holes at the specified ground location down to the rock layer, and at the same time dig rectangular pits of the specified size at the top of the holes, and dig connecting channels between multiple rectangular pits; S2: The entire plane is compacted and hardened, and crushed stone is laid at the same time to treat the base layer; S3: Select the specified steel bars and weld them into unit strip-shaped steel mesh for enclosure; S4: Place the unit strip of steel mesh into the hole position, and at the same time lay multiple crisscrossing steel meshes on the rectangular pit, and weld them to the steel meshes set vertically in the hole; S5: Lay a steel mesh in the connecting channel and weld it to the steel mesh in the rectangular pit; S6: Lay multiple parallel steel meshes in the direction of road travel, lay vertical steel meshes between the multiple parallel steel meshes, and weld them at the same time; The steel mesh includes a transverse mesh, a longitudinal mesh connecting two transverse meshes, a rectangular mesh connecting the bottom of the transverse meshes, a connecting mesh one and a connecting mesh two connecting the two rectangular meshes, and a vertical mesh extending underground connecting the bottom of the rectangular mesh. The rectangular grid, horizontal grid, connecting grid one, longitudinal grid, vertical grid, and connecting grid two are all composed of a single set of grid posts. Each set of grid posts includes multiple vertical steel bars, with multiple ring steel bars welded to the outer wall of each vertical steel bar. Multiple auxiliary steel bars connect two vertical steel bars. Each set of grid posts is assembled by an auxiliary device.

2. The method for laying NPR steel mesh in the surface layer of a highway with deep soft soil as described in claim 1, characterized in that, The rectangular pit uses a 5*5m square pit, and the width of the connecting channel is not less than 1.5m.

3. The method for laying NPR steel mesh in the surface layer of a highway with deep soft soil as described in claim 1, characterized in that, The auxiliary device includes: The lower cover has multiple support rods fixedly connected to it, and the top of the support rods is connected to the upper cover; A movable component, which is fixedly connected to the upper cover, through which the vertical steel penetrates; A welding assembly, with adjusting components connected to both sides, the adjusting components cooperating with a limiting sleeve; The friction assembly is fixedly connected to the lower cover and mates with the vertical steel. A pusher, which is fixedly connected to a support rod, has a contact block connected to its output end; A support frame is fixedly connected to a pneumatic cylinder, and the output of the pneumatic cylinder is fixedly connected to the lower cover.

4. The method for laying NPR steel mesh in the surface layer of a highway with deep soft soil as described in claim 3, characterized in that, The welding assembly includes: A movable frame is fixedly connected to an adjustment component, and a rotating ring is rotatably connected to the middle of the movable frame; A power component one is fixedly connected to a rotating ring, and its output end is driven by a rotating shaft fixedly connected to a movable frame. The rotating shaft is rotatably connected to the rotating ring, and the output end of the power component one is driven by a threaded rod rotatably connected to the rotating ring. A rotating ball is rotatably connected to a rotating ring, with a telescopic rod three fixedly connected in the middle. The outer wall of the telescopic rod three is rotatably sleeved with the rotating ring, and a moving block that is helically driven by a threaded rod is rotatably connected to one side of the rotating ring. A limiting frame is fixedly connected to the output of telescopic rod three. A welding device is rotatably connected to the other end of the limiting frame. A telescopic rod two is rotatably connected to one side of the limiting frame. A steering block that is slidably connected to the limiting frame is rotatably connected to the output end of the telescopic rod two.

5. The method for laying NPR steel mesh in the surface layer of a highway with deep soft soil as described in claim 4, characterized in that, The adjustment component includes: A limited box is fixedly connected to a movable frame, and a power component three is fixedly connected to its bottom. The output end of the power component three is connected to a rolling shaft, and a contact wheel is fixedly sleeved on the outer wall of the rolling shaft. The contact wheel contacts a support rod. Telescopic rod three is fixedly connected to the limiting box, and its output end is connected to a pressure plate, which is in contact with the support rod.

6. The method for laying NPR steel mesh in the surface layer of a highway with deep soft soil as described in claim 3, characterized in that, The moving component includes: A limited sleeve is fixedly connected to the top cover, and multiple drive rings are rotatably connected to it; The mounting box is fixedly connected to the top cover, and a power component two is fixedly connected to one side of it. The output end of the power component two is connected to a transmission component, and a drive wheel that meshes with the drive ring is fixedly sleeved at one end of the transmission component. A movable shaft has movable blocks rotatably connected to both ends of a limiting sleeve, and springs fixedly connected to the limiting sleeve on both sides of the movable blocks. A pressure ring is fixedly sleeved on the outer wall of the movable shaft.

7. The method for laying NPR steel mesh in the surface layer of a highway with deep soft soil as described in claim 6, characterized in that, The limiting sleeve is provided with a receiving groove, the moving block is located in the receiving groove, the limiting sleeve is provided with a sliding cavity, and the pressure ring moves in the sliding cavity.

8. The method for laying NPR steel mesh in the surface layer of a highway with deep soft soil as described in claim 3, characterized in that, The friction assembly includes: A restraint frame is fixedly connected to the lower cover, and a plurality of telescopic rods are fixedly connected to one side of the frame. The output end of each telescopic rod is connected to a push arc, and a pressure sleeve that contacts the vertical steel is sleeved inside the push arc. A high-pressure pump is fixedly connected to the restraint frame, and its output end is connected to an air pipe that is connected to the pressurization sleeve.

9. A method for laying NPR steel mesh in the surface layer of a highway with deep soft soil as described in claim 3, characterized in that, A functional box is fixedly connected to the lower cover, a snap-fit ​​groove is provided on the support rod, and snap-fit ​​holes are provided on the upper and lower covers. The support rod is fixed to the upper and lower covers by pins.

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