Layered reinforced mesh filling ground surface gradual change anti-cracking structure

Abstract

The application discloses a layered reinforced mesh filling ground surface gradual change anti-cracking structure, which comprises a foundation beam, and a backfilling soil area surrounded by the foundation beam, characterized in that: a hydrophobic consolidation layer is arranged at the bottom of the backfilling soil area, a drainage structure is arranged at the bottom of the hydrophobic consolidation layer, a bottom layer grid is arranged at the lower part of the backfilling soil area, one or more upper layer grids are arranged at the upper part of the backfilling soil area, backfilling soil is arranged in the area between the bottom layer grid and the upper layer grid in the backfilling soil area, and a concrete ground surface layer is arranged on the upper surface of the upper layer grid. The drainage structure arranged at the bottom of the backfilling soil effectively prevents the adverse effect of underground water. In the indoor backfilling ground surface structure, two earthwork grids are arranged in layers. The first earthwork grid reinforces and consolidates the backfilled ground foundation soil, improves the bearing capacity and stability of the backfilled ground foundation soil, and reduces the subsidence of the backfilled ground foundation soil. The second earthwork grid reduces uneven settlement and cracks caused by the backfilled ground foundation soil.

Description

Technical Field

[0001] This application relates to a ground crack-resistant structure, and more particularly to a layered reinforced mesh fill ground gradually crack-resistant structure, belonging to the field of building engineering technology. Background Technology

[0002] Indoor backfilled soil floors are prone to settlement cracking, a common quality problem, especially for thicker backfilled soil floors and floors with abundant groundwater. Common solutions include: 1. Designing it as a structural floor, where the ground surface is a reinforced concrete slab forming a rigid structure with the foundation beams; 2. Increasing the thickness of the concrete surface and installing double-layer, two-way steel mesh to strengthen the integrity of the surface layer; 3. Delaying the pouring of concrete on the backfill and accelerating natural settlement and stabilization through methods such as watering. While these three methods can effectively prevent later ground settlement cracking, they are not conducive to controlling construction costs, safety, and schedule. The main reasons are: 1. Designing a structural floor: If the floor is designed as an elevated structure, retaining walls need to be set up around the building to prevent soil loss and subsequent ground settlement and cracking. Furthermore, the floor slab support system is difficult to dismantle and recycle. If the floor is not designed as an elevated structure, brick formwork is required during construction, with the ground beams and structural slabs poured as a whole. However, brick formwork construction is inefficient and costly. 2. Designing a double-layer, two-way steel mesh increases the thickness of the concrete floor, leading to higher construction costs. 3. Delaying the pouring of the concrete floor is detrimental to project schedule control, and erecting upper formwork on unhardened soil poses significant safety hazards. Therefore, researching and developing an economical and effective anti-settlement and cracking structure for indoor backfill concrete floors is of great practical significance. This aims to solve the long-standing problem of uneven foundation settlement and groundwater influence causing settlement and cracking of indoor backfill concrete floors. Summary of the Invention

[0003] The purpose of this application is to provide a layered reinforced mesh fill floor with a gradually crack-resistant structure that can uniformly transfer the load to the foundation, improve the bearing capacity and stability of the indoor floor, effectively avoid the settlement and cracking of the concrete floor in the indoor backfill area caused by uneven settlement and the influence of groundwater, and improve the quality of the project.

[0004] To achieve the objectives of the above application, the technical solution of this application is: a layered reinforced mesh backfill surface gradient crack-resistant structure, including a foundation beam, the area enclosed by the foundation beam being a backfill area, characterized in that: a hydrophobic consolidation layer is provided at the bottom of the backfill area, a drainage structure is provided at the bottom or inside of the hydrophobic consolidation layer, a composite drainage pad is laid on the upper surface of the hydrophobic consolidation layer, a bottom layer of grid mesh is laid at the lower part of the backfill area, one or more upper layers of grid mesh are laid on the upper part of the backfill area, backfill soil is provided in the area between the bottom layer of grid mesh and the upper layer of grid mesh in the backfill area, the bottom layer of grid mesh and the upper layer of grid mesh are connected and fixed to the inner sidewall of the foundation beam by end fasteners, the bottom layer of grid mesh and the upper layer of grid mesh are respectively fixed by grid mesh fasteners, and a concrete floor layer is provided on the upper surface of the upper layer of grid mesh.

[0005] Furthermore, the hydrophobic consolidation layer is a granular crushed stone layer with a particle size of 2 cm to 10 cm and a thickness of 5 cm to 20 cm.

[0006] Furthermore, the drainage structure is a PVC drainage pipe or a stainless steel drainage pipe, with water-permeable holes densely distributed on the drainage pipe, the diameter of which is smaller than the particle size of the gravel.

[0007] Furthermore, the bottom grid is a grid structure made of steel mesh or stainless steel.

[0008] Furthermore, the upper surface of the composite drainage pad is covered with a crushed stone backfill layer or a plain soil backfill layer, and the upper surface of the crushed stone backfill layer or plain soil backfill layer is covered with a bottom layer of grid mesh, which is located more than 5 cm above the bottom of the foundation beam.

[0009] Furthermore, the middle portions of the bottom and upper grid meshes are respectively connected and fixed to the backfill soil by multiple grid mesh fasteners.

[0010] Furthermore, the connection between the bottom and upper grid mesh and the foundation beam is set as an upward L-shaped folded edge, and is fixed to the inner wall of the foundation beam by end fasteners.

[0011] Furthermore, the end fixing component is a steel nail, an expansion bolt, or a fixing iron plate.

[0012] Furthermore, the grid fixing component adopts U-shaped steel nails, U-shaped steel bars, or fixing components with a clamping structure.

[0013] Furthermore, the spacing of the grid fixing members is 60 cm to 120 cm.

[0014] The beneficial effects of this application are:

[0015] 1. The structure of this application is reasonable. By setting a hydrophobic consolidation layer at the bottom of the indoor backfill area and setting a drainage structure inside the hydrophobic consolidation layer, the ground capillary water is effectively guided to be discharged into the outdoor drainage well through the drainage structure, and water that has invaded the backfill area for any reason is discharged in a timely manner, keeping the backfill soil in a relatively stable state. At the same time, the hydrophobic consolidation layer has good stress diffusion ability.

[0016] 2. This application can effectively cut off underground capillary water and promptly drain any water that intrudes into the backfill area, keeping the backfill soil in a relatively stable state. At the same time, the hydrophobic consolidation layer has good stress diffusion ability, effectively avoiding cracks caused by uneven settlement.

[0017] 3. This application employs a multi-layer geogrid structure in the construction of the indoor backfilled soil surface. The bottom layer of geogrid reinforces and strengthens the backfilled foundation soil, improving its bearing capacity and stability and reducing settlement. Multiple geogrids are then installed after backfilling with clay and graded crushed stone to reduce uneven settlement and cracking caused by the backfilled foundation soil. Finally, a plain concrete surface layer is constructed. By adding geogrids between the two backfilling layers, the deformation of the backfill soil is gradually reduced, and the settlement of the backfill soil is gradually addressed, ensuring good crack resistance of the backfilled soil surface. Attached Figure Description

[0018] Figure 1 This is a structural diagram of this application.

[0019] Figure 2 This is a schematic diagram of the structure after the drainage structure is installed in the backfill area of ​​this application.

[0020] Figure 3 yes Figure 2 A top-down structural diagram.

[0021] Figure 4 This application Figure 2 A schematic diagram of the structure after adding a hydrophobic consolidation layer and a composite drainage pad.

[0022] Figure 5 yes Figure 4 A schematic diagram of the structure after adding and installing the bottom layer of grid mesh.

[0023] Figure 6 yes Figure 5 Schematic diagram of the structure after adding backfill soil and laying and installing the upper layer of grid mesh.

[0024] Figure 7 yes Figure 1 A magnified structural diagram of part a.

[0025] In the diagram: 1. Foundation beam; 2. Backfill area; 3. Drainage consolidation layer; 4. Drainage structure; 5. Composite drainage pad; 6. Bottom layer grid; 7. Upper layer grid; 8. End fastener; 9. Grid fastener; 10. Plain soil backfill layer; 11. Backfill soil; 12. Water-permeable hole; 13. Concrete floor layer. Detailed Implementation

[0026] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] See Figures 1 to 7 This application discloses a layered reinforced mesh backfill surface gradient crack-resistant structure, comprising a foundation beam 1, the area enclosed by the foundation beam 1 being a backfill area 2, characterized in that: a hydrophobic consolidation layer 3 is provided at the bottom of the backfill area 2, a drainage structure 4 is provided at the bottom or inside of the hydrophobic consolidation layer 3, a composite drainage pad 5 is laid on the upper surface of the hydrophobic consolidation layer 3, a bottom layer grid 6 is laid at the lower part of the backfill area 2, one or more upper layer grids 4 are laid at the upper part of the backfill area 2, backfill soil 11 is provided in the area between the bottom layer grid 6 and the upper layer grid 7 in the backfill area 2, the bottom layer grid 6 and the upper layer grid 7 are connected and fixed to the inner sidewall of the foundation beam 1 by end fixing members 8, the bottom layer grid 6 and the upper layer grid 7 are respectively fixed by grid fixing members 9, and a concrete floor layer 13 is provided on the upper surface of the upper layer grid 7.

[0028] The hydrophobic consolidation layer 3 is a granular crushed stone layer with a particle size of 2 cm to 10 cm and a thickness of 5 cm to 20 cm.

[0029] The drainage structure 4 is a PVC drainage pipe or a stainless steel drainage pipe, and the drainage pipe is densely covered with water-permeable holes 12, the diameter of which is smaller than the particle size of the gravel.

[0030] The bottom grid 6 is a grid structure made of steel mesh or stainless steel.

[0031] The upper surface of the composite drainage pad 5 is covered with a crushed stone backfill layer or a plain soil backfill layer 10, and the upper surface of the crushed stone backfill layer or plain soil backfill layer 10 is covered with a bottom grid mesh 6, which is located 5 cm above the bottom of the foundation beam 1.

[0032] The middle sections of the bottom layer grid 6 and the upper layer grid 7 are respectively connected and fixed to the backfill soil by multiple grid fixing members 9.

[0033] The connection between the bottom grid 3 and the upper grid 4 and the foundation beam 1 is set as an upward L-shaped folded edge, and is fixed to the inner wall of the foundation beam 1 by the end fastener 8.

[0034] The end fixing component 8 is a steel nail, expansion bolt, or fixing iron plate.

[0035] The grid fixing component 9 is made of U-shaped steel nails, U-shaped steel bars, or a fixing component with a clamping structure.

[0036] The spacing of the grid fixing members 9 is 60 cm to 120 cm.

[0037] This application effectively guides groundwater to drain into outdoor drainage wells by setting a drainage consolidation layer at the bottom of the indoor backfill area and incorporating a drainage structure within the consolidation layer. This effectively prevents the adverse effects of groundwater. Simultaneously, the indoor backfill surface construction method employs multiple layers of geogrids. The first geogrid reinforces the backfill foundation soil, improving its bearing capacity and stability and reducing settlement. A second geogrid is then installed after backfilling with clay and graded crushed stone to reduce uneven settlement and cracking caused by the backfill foundation soil. Finally, a plain concrete surface layer is constructed. By adding geogrids between the two backfill layers, the deformation of the backfill soil is gradually reduced, and backfill settlement is gradually addressed, ensuring the backfill surface is crack-resistant. The specific structure of this application is as follows:

[0038] After the structural foundation and foundation beams reach their design strength, backfilling and compaction are carried out in layers according to the foundation beams. The area enclosed by foundation beam 1 is backfill area 2. A drainage consolidation layer 3 is set at the bottom of backfill area 2. The drainage consolidation layer 3 is laid with granular crushed stone with a particle size of 2 cm-10 cm and a thickness of 5 cm-20 cm.

[0039] A drainage structure 4 is provided at the bottom or inside of the hydrophobic consolidation layer 3. The drainage structure 4 is made of PVC or stainless steel drainage pipe. The drainage pipe is densely covered with permeable holes 12. The diameter of the permeable holes 12 is smaller than the particle size of the crushed stone, so as to prevent the crushed stone from clogging the permeable holes 12. The drainage outlet of the drainage pipe extends outdoors and is connected to the outdoor drainage well or outdoor drainage network. The capillary water in the ground seeps into the drainage pipe through the permeable holes 12 and is discharged to the outdoor drainage network, thereby effectively and timely draining any water that enters the backfill area for any reason, keeping the backfill soil in a relatively stable state. At the same time, the hydrophobic consolidation layer has good stress diffusion ability, effectively avoiding cracks caused by uneven settlement.

[0040] A composite drainage pad 5 is laid on the upper surface of the hydrophobic consolidation layer 3, and a crushed stone backfill layer or plain soil backfill layer 10 is laid on the upper surface of the composite drainage pad 5. The composite drainage pad 5 can prevent the upper backfill soil from seeping into the hydrophobic consolidation layer 3 and clogging the permeable holes 12. A bottom grid mesh 3 is laid on the upper surface of the crushed stone backfill layer or plain soil backfill layer 10, and the bottom grid mesh 3 is located 5 cm above the bottom of the foundation beam 1.

[0041] The bottom layer grid 6 is connected and fixed to the inner wall of the foundation beam 1 by end fasteners 8. The connection between the bottom layer grid 6 and the foundation beam 1 is set as an upward L-shaped fold. The L-shaped fold is fixed to the inner wall of the foundation beam 1 by end fasteners 8. The end fasteners 8 can be steel nails, expansion bolts or fixing iron plates.

[0042] One or more layers of upper-layer geogrid 4 are laid on the upper part of the backfill area 2. Backfill soil 11 is backfilled in the area between the bottom-layer geogrid 6 and the upper-layer geogrid 7 within the backfill area 2. The upper-layer geogrid 7 is also connected and fixed to the inner wall of the foundation beam 1 by end fasteners 8. The connection between the upper-layer geogrid 7 and the foundation beam 1 is set as an upward L-shaped fold. The L-shaped fold is fixed to the inner wall of the foundation beam 1 by the end fasteners 8, ensuring the stability of the edge of the upper-layer geogrid 7.

[0043] The bottom layer grid 3 and the upper layer grid 7 are grid structures made of steel mesh or stainless steel. Multiple grid fixing members 9 are distributed evenly on both the bottom layer grid 3 and the upper layer grid 7. These fixing members 9 are used to secure the bottom layer grid 3 and the upper layer grid 7, with the distance between adjacent fixing members 9 controlled between 60 cm and 120 cm. The fixing members 9 can be U-shaped steel nails, U-shaped steel bars, or fixing members with a clamping structure. The fixing members 9 are inserted into the crushed stone backfill layer or plain soil backfill layer 10 below the bottom layer grid 3 to secure it. Similarly, the fixing members 9 are inserted into the backfill soil below the upper layer grid 7 to secure it. A concrete floor layer 13 is provided on the upper surface of the upper layer grid 7 as the surface layer of the indoor floor.

[0044] The above description is a further detailed explanation of this application in conjunction with specific embodiments. It should not be considered that the specific implementation of this application is limited to these descriptions. For those skilled in the art, there will be various simple substitutions, improvements and changes to this application without departing from the concept of this application. All such simple substitutions, improvements and changes should be considered to fall within the protection scope of this application.

Claims

1. A layered reinforced mesh backfill surface gradient crack-resistant structure, comprising a foundation beam (1), wherein the area enclosed by the foundation beam (1) is a backfill area (2), characterized in that: The bottom of the backfill area (2) is provided with a hydrophobic consolidation layer (3), and a drainage structure (4) is provided at the bottom or inside of the hydrophobic consolidation layer (3). A composite drainage pad (5) is laid on the upper surface of the hydrophobic consolidation layer (3). A bottom layer grid (6) is laid at the bottom of the backfill area (2), and one or more upper layer grids (7) are laid on the upper part of the backfill area (2). Backfill soil (11) is provided in the area between the bottom layer grid (6) and the upper layer grid (7) in the backfill area (2). The bottom layer grid (6) and the upper layer grid (7) are connected and fixed to the inner wall of the foundation beam (1) by end fixings (8). The bottom layer grid (6) and the upper layer grid (7) are fixed by grid fixings (9). A concrete floor layer (13) is provided on the upper surface of the upper layer grid (7).

2. The layered reinforced earth surface grading and crack control structure according to claim 1, characterized in that: The hydrophobic consolidation layer is a granular crushed stone layer with a particle size of 2 cm to 10 cm and a thickness of 5 cm to 20 cm.

3. The layered reinforced earth surface grading and crack control structure according to claim 1, characterized in that: The drainage structure (4) is a PVC drainage pipe or a stainless steel drainage pipe, and the drainage pipe is densely covered with water-permeable holes (12). The diameter of the water-permeable holes (12) is smaller than the particle size of the crushed stone.

4. The layered reinforced mesh soil fill surface gradient crack-resistant structure according to claim 1, characterized in that: The bottom grid (6) is a grid structure made of steel mesh or stainless steel.

5. A layered reinforced mesh soil fill surface gradient crack-resistant structure according to claim 1, characterized in that: The upper surface of the composite drainage pad (5) is covered with a crushed stone backfill layer or a plain soil backfill layer (10), and the upper surface of the crushed stone backfill layer or plain soil backfill layer (10) is covered with a bottom grid mesh (6), which is located 5 cm above the bottom of the foundation beam (1).

6. The layered reinforced mesh soil fill surface gradient crack-resistant structure according to claim 1, characterized in that: The middle portions of the bottom grid (6) and the top grid (7) are respectively connected and fixed to the backfill soil by multiple grid fixing members (9).

7. A layered reinforced mesh soil fill surface gradient crack-resistant structure according to claim 1, characterized in that: The connection between the bottom grid (6) and the top grid (7) and the foundation beam (1) is set as an upward L-shaped fold, and is fixed to the inner wall of the foundation beam (1) by the end fastener (8).

8. The layered reinforced mesh soil fill surface gradient crack-resistant structure according to claim 1, characterized in that: The end fastener (8) is a steel nail, an expansion bolt, or a fixing iron plate.

9. A layered reinforced mesh soil fill surface gradient crack-resistant structure according to claim 6, characterized in that: The grid fastener (9) is made of U-shaped steel nails, U-shaped steel bars or fasteners with a clamping structure.

10. A layered reinforced mesh soil fill surface gradient crack-resistant structure according to claim 6 or 9, characterized in that: The spacing of the grid fixing members (9) is 60 cm to 120 cm.

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