A construction method of a three-way geogrid composite gravel pile roadbed

Abstract

The application provides a construction method of a three-way geogrid composite crushed stone pile roadbed, which comprises the following steps: detecting and cleaning a lower bearing layer; detecting the construction quality of a roadbed shallow layer replacement, and paving a three-way geogrid after the detection is qualified; fixing a group of three-way geogrids in advance, then unfolding and paving the unfixed three-way geogrid along the side edge of the fixed three-way geogrid by a traction assembly, and keeping the two groups of three-way geogrids without gaps and misplacement; fixing the geogrids; and inserting the adjacent three-way geogrids into the ground through fixing pieces at four corners, and then splicing and fixing the three-way geogrids on both sides. Compared with the prior art, the unfixed three-way geogrid is unfolded and paved along the side edge of the fixed three-way geogrid by the traction assembly, and the subsequent fixing work is completed, the unfixed three-way geogrid is guided and limited during the process, the misplacement of the unfixed three-way geogrid is prevented, the large gap between the two is avoided, and the paving efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of roadbed construction technology, specifically to a construction method for a three-dimensional geogrid composite crushed stone pile roadbed. Background Technology

[0002] Subgrade replacement refers to the overall adjustment required during the construction of foundation engineering projects such as embankments or roads due to differences in the material of the paving stones, the properties of the clay, and the degree of compaction. The main purpose of subgrade replacement is to improve the stability and bearing capacity of the subgrade, while also improving its drainage performance and preventing subgrade settlement.

[0003] In existing shallow replacement techniques, the typical steps are: cleaning the existing roadbed, inspecting and repairing the existing roadbed, excavating the original soil, removing the original soil, laying new fill, compacting as needed, checking the height and slope of the roadbed and making adjustments. If the density of the original layer and the new fill material is not uniform during the process, in order to increase the stability of the roadbed or to strengthen the roadbed's earthquake resistance and anti-skid requirements, it is usually necessary to lay geogrid between the original layer and the replacement layer.

[0004] In existing technologies, when laying geogrids, since the geogrids are rolled up after production, one end needs to be fixed and continuously unrolled, while the other end is manually pulled to unfold and lay flat. However, this process can easily lead to misalignment or gaps between adjacent geogrids, which in turn affects the strength and stability of the roadbed after replacement. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a construction method for a triaxial geogrid composite crushed stone pile subgrade to solve the problems mentioned in the background. The present invention has a novel structure. By using a traction component, the unfixed triaxial geogrid is laid out along the side of the fixed triaxial geogrid and the subsequent fixing work is completed. During the process, the unfixed triaxial geogrid is guided and limited to prevent misalignment and movement that could lead to a large gap between the two, thereby improving the efficiency of the laying process.

[0006] To achieve the above objectives, the present invention provides a construction method for a triaxial geogrid composite crushed stone pile subgrade, the construction method comprising the following steps:

[0007] S1. Inspect and clean the underlying layer: Inspect the quality of the shallow replacement construction of the subgrade, clean, level and compact the underlying layer;

[0008] S2. After passing the inspection, lay the three-dimensional geogrid: a set of three-dimensional geogrids is pre-fixed and installed on one side of the fixed three-dimensional geogrid through the connecting seat of the traction component. The traction seat and guide seat are respectively installed on both sides of the traction end of the unfixed three-dimensional geogrid. The guide seat slides along the side of the fixed three-dimensional geogrid, and the limiting seat limits the movement path of the unfixed three-dimensional geogrid, which drives the unfixed three-dimensional geogrid to unfold and lay flat, keeping the two sets of three-dimensional geogrids without gaps.

[0009] S3. Fixed geogrid: Adjacent triaxial geogrids are inserted into the ground at the four corners using fasteners and then spliced ​​and fixed to the triaxial geogrids on both sides.

[0010] S4. Paving the upper subgrade soil: The original subgrade is shallowly replaced with crushed stone piles, and the crushed stone is interlocked with the three-dimensional geogrid to improve the stability and strength of the subgrade.

[0011] S5. Compaction and Covering: After the upper layer of fill material is laid, compaction should be completed in a timely manner to avoid prolonged exposure to the sun. Then, mechanical material transportation, leveling, and compaction should be carried out. Mechanical paving and compaction should proceed from both sides to the middle.

[0012] Furthermore, in step S2, before the unfixed triaxial geogrid is laid out, the connecting seat on the side of the fixed triaxial geogrid is fixed to the ground by the fixing cone, and the limiting seat is pulled outward to fix the limiting seat to the ground by the fixing cone, thus forming a moving guide frame for the unfixed triaxial geogrid.

[0013] Furthermore, in step S2, when the unfixed triaxial geogrid is unfolded and laid flat, the limiting frame of the connecting seat cooperates with the limiting seat to guide and limit the movement direction of the unfixed triaxial geogrid after unfolding, and slides along the side of the fixed triaxial geogrid through the limiting frame of the guide seat.

[0014] Furthermore, after the unfixed triaxial geogrid is laid out in step S2, the traction assembly is retracted by winding the connecting ropes of the connecting seat, limiting seat, traction seat and guide seat to lay the next set of triaxial geogrids.

[0015] Furthermore, when the traction assembly is installed on the unfixed triaxial geogrid, the guide seat and the traction seat are connected to the unfixed triaxial geogrid with elastic clamps, which are then fixed to the front end of the unfixed triaxial geogrid connection by elastic clamping, thereby pulling the unfixed triaxial geogrid connection to move and unfold, and lay flat on the roadbed surface.

[0016] Furthermore, in step S2, when fixing the geogrid, the horizontal plate is manually tapped to move it downwards along the vertical frame until both ends of the fixing member pass through the two sets of three-way geogrid openings and are inserted into the ground to complete the fixing.

[0017] Furthermore, after the fasteners are secured, the rubber plugs are forcefully pulled out of the insertion holes, and new fasteners are reinstalled before the next set of three-dimensional geogrids is unfolded and laid flat.

[0018] Furthermore, during the production of triaxial geogrids, a rough pattern is pressed to enhance the surface roughness of the geogrid and increase the coefficient of friction between the geogrid and the soil.

[0019] The beneficial effects of the present invention: The present invention provides a construction method for a three-dimensional geogrid composite crushed stone pile subgrade, comprising: a fixed three-dimensional geogrid; a fastener; a socket; a traction assembly; a connecting seat; a limiting seat; a traction seat; a guide seat; a vertical frame; a spring; a horizontal plate; a plug; a rubber plug; a winding roller; a connecting rope; a fixing cone; a limiting frame; and an unfixed three-dimensional geogrid.

[0020] 1. The present invention guides and limits the movement direction of the unfixed three-dimensional geogrid after it is unfolded by cooperating with the limiting frame of the connecting seat, thereby preventing the unfixed three-dimensional geogrid from shifting to the left or right after it is unfolded, and making it easier to merge two adjacent three-dimensional geogrids.

[0021] 2. The present invention uses elastic clamping to fix the unfixed three-dimensional geogrid connection at the front end, thereby pulling the unfixed three-dimensional geogrid connection to move and unfold, and lay it flat on the roadbed surface.

[0022] 3. The present invention retracts the traction assembly by winding up the connecting ropes of the connecting seat, limiting seat, traction seat and guide seat to lay the next set of three-dimensional geogrids.

[0023] 4. Compared with the prior art, the present invention uses a traction component to lay the unfixed triaxial geogrid along the side of the fixed triaxial geogrid and complete the subsequent fixing work. During the process, the unfixed triaxial geogrid is guided and limited to prevent it from shifting and causing a large gap between the two, thereby improving the efficiency of laying. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of a construction method for a three-dimensional geogrid composite crushed stone pile subgrade according to the present invention;

[0025] Figure 2 This is a schematic diagram of the insulation layer structure in the construction method of a three-dimensional geogrid composite crushed stone pile subgrade according to the present invention.

[0026] Figure 3 This is a schematic diagram of one end of the storage tank in the construction method of the triaxial geogrid composite crushed stone pile subgrade of the present invention.

[0027] Figure 4 This is a schematic diagram of the other end of the storage tank for the construction method of a three-dimensional geogrid composite crushed stone pile subgrade according to the present invention.

[0028] Figure 5 This is a schematic diagram of the rotating component structure of a construction method for a three-dimensional geogrid composite crushed stone pile subgrade according to the present invention.

[0029] Figure 6 This is a schematic diagram of area A of the construction method for a three-dimensional geogrid composite crushed stone pile subgrade according to the present invention.

[0030] In the diagram: 1. Fixed triaxial geogrid; 2. Fixing element; 21. Insertion hole; 3. Traction assembly; 31. Connecting seat; 32. Limiting seat; 33. Traction seat; 34. Guide seat; 35. Vertical frame; 36. Spring; 37. Horizontal plate; 38. Insertion post; 39. Rubber plug; 310. Winding roller; 311. Connecting rope; 312. Fixing cone; 313. Limiting frame; 4. Unfixed triaxial geogrid. Detailed Implementation

[0031] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0032] Please see Figures 1 to 6 This invention provides a technical solution: a construction method for a three-dimensional geogrid composite crushed stone pile subgrade, the construction method comprising the following steps:

[0033] S1. Inspect and clean the underlying layer: Inspect the quality of the shallow replacement construction of the subgrade, clean, level and compact the underlying layer;

[0034] S2. After passing the inspection, lay the three-dimensional geogrid: a set of three-dimensional geogrids is pre-fixed and installed on one side of the fixed three-dimensional geogrid through the connecting seat of the traction component. The traction seat and guide seat are respectively installed on both sides of the traction end of the unfixed three-dimensional geogrid. The guide seat slides along the side of the fixed three-dimensional geogrid, and the limiting seat limits the movement path of the unfixed three-dimensional geogrid, which drives the unfixed three-dimensional geogrid to unfold and lay flat, keeping the two sets of three-dimensional geogrids without gaps.

[0035] S3. Fixed geogrid: Adjacent triaxial geogrids are inserted into the ground at the four corners by fixing pieces 2 and then spliced ​​and fixed with the triaxial geogrids on both sides.

[0036] S4. Paving the upper subgrade soil: The original subgrade is shallowly replaced with crushed stone piles, and the crushed stone is interlocked with the three-dimensional geogrid to improve the stability and strength of the subgrade.

[0037] S5. Compaction and Covering: After the upper layer of fill material is laid, compaction should be completed in a timely manner to avoid prolonged exposure to the sun. Then, mechanical material transportation, leveling, and compaction should be carried out. Mechanical paving and compaction should proceed from both sides to the middle.

[0038] The construction of a triaxial geogrid includes multiple sets of triaxial geogrids, which are divided into fixed and unfixed types. At the connection between the fixed triaxial geogrid 1 and the unfixed triaxial geogrid 4, a traction component 3 is provided to guide the unfixed triaxial geogrid 4. The traction component 3 includes a connecting seat 31, which is sleeved on the adjacent tail end side of the fixed triaxial geogrid 1 and the unfixed triaxial geogrid 4. A limiting seat 32 is provided on the other side of the unfixed triaxial geogrid 4 at the same horizontal straight line as the connecting seat 31. A traction seat 33 is installed on the front end side of the unfixed triaxial geogrid 4 at the same vertical straight line as the limiting seat 32, and a guide seat 34 is installed on the other side of the unfixed triaxial geogrid 4 at the same horizontal straight line as the traction seat 33. The guide seat 34 slides along the side of the fixed triaxial geogrid 1. The front and rear ends of the fixed triaxial geogrid 1 away from the unfixed triaxial geogrid 4 are fixed to the ground by a fixing member 2.

[0039] When using the device, after the original road surface of the subgrade is excavated, the wound triaxial geogrid is unfolded and fixed on the ground by the traction component 3. In sequence, after the unfolded triaxial geogrid is fixed, the unfixed triaxial geogrid 4 is then laid flat and close to the fixed triaxial geogrid 1 by the traction component 3, so that there are no gaps and no misalignment.

[0040] In this embodiment, the traction assembly 3 further includes a vertical frame 35. The tops of both the connecting seat 31 and the guide seat 34 are fixed with the vertical frame 35, and a horizontal plate 37 is slidably connected inside the vertical frame 35. A spring 36 is fixed between the bottom of the horizontal plate 37 and the inner wall of the vertical frame 35. A post 38 is fixedly inserted into the front surface of the horizontal plate 37, and a rubber plug 39 is fixed to the bottom of the post 38. A through hole 21 is opened on the surface of the fixing member 2, and the post 38 can slide through the hole 21. The rubber plug 39 and the fixing member 2... The bottom of the insertion hole 21 is pressed into contact. Fixing members 2 are installed on the surfaces of the connecting seat 31 and the guide seat 34. After the unfixed triaxial geogrid 4 is unfolded and laid flat on the side of the fixed triaxial geogrid 1, the horizontal plate 37 is moved downward along the vertical frame 35 by manually tapping it until the two ends of the fixing member 2 pass through the hollow parts of the two sets of triaxial geogrids and are inserted into the ground to complete the fixing. Then, the rubber plug 39 is pulled out from the insertion hole 21 and a new fixing member 2 is reinstalled to unfold and lay the next set of triaxial geogrids.

[0041] In this embodiment, the tops of the connecting seat 31, the limiting seat 32, the traction seat 33, and the guide seat 34 are all equipped with take-up rollers 310 via bearings. A set of take-up rollers 310 is installed on the tops of the connecting seat 31 and the guide seat 34, and two sets of take-up rollers 310 are installed on the tops of the limiting seat 32 and the traction seat 33. A connecting rope 311 is wound onto the surface of each take-up roller 310. The connecting seat 31, the limiting seat 32, the traction seat 33, and the guide seat 34 are connected in a U-shape via the take-up rollers 310 and the connecting rope 311. The take-up rollers 310 connected to the tops of the connecting seat 31, the limiting seat 32, the traction seat 33, and the guide seat 34 can be locked and rotated by bolts. Fixing cones 312 are inserted into the surfaces of the connecting seat 31 and the limiting seat 32. The connecting seat 31, which has been fixed to the side of the three-dimensional geogrid 1, is fixed to the ground via the fixing cones 312. Then, the limiting seat 32 is pulled outwards until the distance between the limiting seat 32 and the connecting seat 31 is sufficient. The unfixed triaxial geogrid 4 is passed through, and then the limiting seat 32 is fixed to the ground by the fixing cone 312, forming a moving guide frame for the unfixed triaxial geogrid 4. During this process, the connecting rope 311 is unwound, and the take-up roller 310 connecting the connecting seat 31 and the limiting seat 32 is locked by bolts. The guide seat 34 is fixed to the side of the unfixed triaxial geogrid 4 away from the traction seat 33 in the same way, and the take-up roller 310 of the traction seat 33 and the guide seat 34 is fixed by bolts to maintain the length of the connecting rope 311. As the unfixed triaxial geogrid 4 unfolds, the traction seat 33 moves away from the limiting seat 32, and the connecting rope 311 of the two is unwound, which drives the unfixed triaxial geogrid 4 to unfold on the flat ground. After the laying and fixing are completed, the traction assembly 3 is retracted by the connecting rope 311 of the connecting seat 31, the limiting seat 32, the traction seat 33 and the guide seat 34 to lay the next set of triaxial geogrids.

[0042] In this embodiment, the connecting seat 31 consists of two vertical limiting frames 313. The guide seat 34 is provided with limiting frames 313 corresponding to the side of the fixed three-dimensional geogrid 1, and the unfixed three-dimensional geogrid 4 slides along the limiting frames 313 of the connecting seat 31. The limiting frames 313 of the guide seat 34 slide along the side of the fixed three-dimensional geogrid 1. The limiting frames 313 of the connecting seat 31 cooperate with the limiting seat 32 to guide and limit the movement direction of the unfixed three-dimensional geogrid 4 after it is unfolded, preventing the unfixed three-dimensional geogrid 4 from shifting left and right after it is unfolded. This makes it easier to merge two adjacent three-dimensional geogrids. By sliding the limiting frames 313 of the guide seat 34 along the side of the fixed three-dimensional geogrid 1, and cooperating with the traction seat 33, it is easier to unfold and move the unfixed three-dimensional geogrid 4.

[0043] In this embodiment, the traction seat 33 is equipped with an elastic clamping frame, and the side of the guide seat 34 connected to the unfixed three-dimensional geogrid 4 is also equipped with an elastic clamping frame. The connection points of the guide seat 34 and the traction seat 33 with the unfixed three-dimensional geogrid 4 are both equipped with elastic clamping frames. Thus, the unfixed three-dimensional geogrid 4 is fixed to the front end of the connection of the unfixed three-dimensional geogrid 4 through elastic clamping, thereby pulling the connection of the unfixed three-dimensional geogrid 4 to move and unfold, and lay flat on the roadbed surface.

[0044] When using the device, after the original road surface excavation is completed, the wound triaxial geogrid is unwound and fixed to the ground by the traction component 3. In sequence, the connecting seat 31 on the side of the fixed triaxial geogrid 1 is fixed to the ground by the fixing cone 312. Then, the limiting seat 32 is pulled outward until the distance between the limiting seat 32 and the connecting seat 31 is large enough for the unfixed triaxial geogrid 4 to pass through. Then, the limiting seat 32 is fixed to the ground by the fixing cone 312, forming a moving guide frame for the unfixed triaxial geogrid 4. During this process, the connecting rope 311 is unwound, and the winding roller 310 connecting the connecting seat 31 and the limiting seat 32 is locked by bolts, and the guide seat 34 is secured. The unfixed three-dimensional geogrid 4 is fixed in the same way on the side away from the traction seat 33, and the winding roller 310 of the traction seat 33 and the guide seat 34 is fixed with bolts to maintain the length of the connecting rope 311. As the unfixed three-dimensional geogrid 4 unfolds, the traction seat 33 moves away from the limiting seat 32, and the connecting rope 311 of the two is unwound, which drives the unfixed three-dimensional geogrid 4 to unfold on the flat ground. After the laying and fixing are completed, the traction assembly 3 is retracted by winding the connecting rope 311 of the connecting seat 31, the limiting seat 32, the traction seat 33 and the guide seat 34 to lay the next set of three-dimensional geogrids, so that there are no gaps and no misalignment.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0046] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A construction method for a three-dimensional geogrid composite crushed stone pile subgrade, characterized in that: The construction method includes the following steps: S1. Inspect and clean the underlying layer: Inspect the quality of the shallow replacement construction of the subgrade, clean, level and compact the underlying layer; S2. After passing the inspection, lay the triaxial geogrid: Pre-fix a set of triaxial geogrids, and install the connecting seat of the traction assembly on one side of the fixed triaxial geogrid; the traction assembly includes a connecting seat, a limiting seat, a traction seat, and a guide seat. Each of the connecting seat, limiting seat, traction seat, and guide seat has a winding roller mounted on its top via bearings. A set of winding rollers is mounted on the top of the connecting seat and guide seat, and two sets of winding rollers are mounted on the top of the limiting seat and traction seat. A connecting rope is wound onto the surface of each winding roller. The connecting seat, limiting seat, traction seat, and guide seat are connected in a U-shape via the winding rollers and connecting rope. The winding rollers connected to the top of the connecting seat, limiting seat, traction seat, and guide seat can be locked and rotated by bolts. A fixing cone is inserted into the surface of the connecting seat and limiting seat; the connecting seat consists of two vertical... The system consists of a limiting frame, with the guide seat corresponding to the side of the fixed triaxial geogrid. Before the unfixed triaxial geogrid is unfolded and laid flat, the connecting seat on the side of the fixed triaxial geogrid is fixed to the ground by a fixing cone. The limiting seat is pulled outward and fixed to the ground by the fixing cone, forming a moving guide frame for the unfixed triaxial geogrid. When the unfixed triaxial geogrid is unfolded and laid flat, the traction seat and the guide seat are respectively installed on both sides of the traction end of the unfixed triaxial geogrid. With the cooperation of the limiting frame of the connecting seat and the limiting seat, the movement direction of the unfixed triaxial geogrid after unfolding is guided and limited. The limiting frame of the guide seat slides along the side of the fixed triaxial geogrid, driving the unfixed triaxial geogrid to unfold and lay flat, keeping the two sets of triaxial geogrids without gaps. S3. Fixed geogrid: Adjacent triaxial geogrids are inserted into the ground at the four corners using fasteners and then spliced ​​and fixed to the triaxial geogrids on both sides. S4. Paving the upper subgrade soil: The original subgrade is shallowly replaced with crushed stone piles, and the crushed stone is interlocked with the three-dimensional geogrid to improve the stability and strength of the subgrade. S5. Compaction and Covering: After the upper layer of fill material is laid, compaction should be completed in a timely manner to avoid prolonged exposure to sunlight. Then, mechanical material transportation, leveling, and compaction should be carried out. Mechanical paving and compaction should proceed from both sides to the middle.

2. The construction method of a triaxial geogrid composite crushed stone pile subgrade according to claim 1, characterized in that: After the unfixed triaxial geogrid is laid flat in step S2, the traction assembly is retracted by winding the connecting ropes of the connecting seat, limiting seat, traction seat and guide seat to lay the next set of triaxial geogrids.

3. The construction method of a triaxial geogrid composite crushed stone pile subgrade according to claim 1, characterized in that: When the traction assembly is installed on the unfixed triaxial geogrid, the guide seat and the traction seat are connected to the unfixed triaxial geogrid with elastic clamps. The clamps are then fixed to the front end of the unfixed triaxial geogrid connection, thereby pulling the unfixed triaxial geogrid connection to move and unfold, and lay flat on the roadbed surface.

4. The construction method of a triaxial geogrid composite crushed stone pile subgrade according to claim 3, characterized in that: In step S3, when fixing the geogrid, the traction assembly also includes a vertical frame. The top of the connecting seat and the guide seat are both fixed with the vertical frame, and a horizontal plate is slidably connected inside the vertical frame. A spring is fixed between the bottom of the horizontal plate and the inner wall of the vertical frame. A post is fixedly inserted into the front surface of the horizontal plate, and a rubber plug is fixed at the bottom of the post. A through hole is opened on the surface of the fixing component, and the post can slide through the hole. The rubber plug is pressed against the bottom of the hole of the fixing component. The horizontal plate is manually tapped to move it downward along the vertical frame until both ends of the fixing component pass through the two sets of three-dimensional geogrid openings and are inserted into the ground, thus completing the fixing.

5. The construction method of a triaxial geogrid composite crushed stone pile subgrade according to claim 4, characterized in that: After the fasteners are secured, forcefully pull the rubber plug out of the socket, then reinstall the new fasteners and proceed with the unfolding and paving of the next set of three-dimensional geogrids.

6. The construction method of a triaxial geogrid composite crushed stone pile subgrade according to claim 1, characterized in that: During the production of triaxial geogrids, a rough pattern is pressed to enhance the surface roughness of the geogrid and increase the coefficient of friction between the geogrid and the soil.

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