Municipal road local reinforcing structure
By using foundation pits, steel frames, and concrete filling in the local road reinforcement structure, the problem of road settlement caused by underground cavities was solved, and the stability and safety of the road were improved.
Patent Information
- Application Number
- CN202520508860.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-21
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-03-21
AI Technical Summary
Traditional repair methods cannot completely solve the road subsidence problem caused by underground cavities, are prone to secondary damage, and are greatly affected by the skill level of construction workers.
The municipal road uses a partial reinforcement structure, including a foundation pit, steel frame, anchor holes and steel mesh. Through the connection of upper and lower steel mesh and fixing bars, combined with the filling of concrete and asphalt, a stable road structure is formed.
It improves the stability of road repair, prevents secondary settlement, strengthens the roadbed structure, and ensures road safety and service life.
Smart Images
Figure CN223936930U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of road construction, and particularly relates to a local reinforcement structure for municipal roads. Background Technique
[0002] Due to karst erosion, goaf remnants, or leakage of underground pipelines, some substances in the rock and soil mass are lost, quietly forming underground cavities. Once the cavity appears, the stress of the surrounding soil mass is unbalanced. Under the pull of gravity, the soil particles gradually migrate into the cavity, causing the cavity to continue to expand. As the cavity continues to grow, the support under the roadbed above becomes increasingly weak. The heavy pressure of passing vehicles disrupts the stress distribution of the roadbed soil, and uneven settlement thus begins. This settlement is quickly transmitted to the road surface, first with fine cracks appearing, and then the depression gradually becoming obvious. As time goes by, when the rock layer at the top of the karst cave cannot bear the loads such as the road above and vehicles, it will suddenly collapse, resulting in a huge pit on the road surface.
[0003] The traditional repair method is to clean up the sundries, loose soil, etc. in the huge pit, and then use materials such as crushed stones and sand for layered backfilling. Each layer is tamped, and finally asphalt concrete is laid on the surface and compacted. This method does not thoroughly handle the diseases around the huge pit. Under the repeated action of vehicle loads, settlement is likely to occur again, resulting in the repair area being damaged again. Moreover, the quality of layered backfilling and tamping is greatly affected by the operation level of construction workers. If the compaction degree is insufficient, it will affect the repair effect. Content of the Utility Model
[0004] The utility model provides a local reinforcement structure for municipal roads, aiming to reinforce and strengthen the underground soil layer when dealing with ground depressions and fractures, preventing secondary settlement after the road surface is repaired, causing traffic congestion and economic losses.
[0005] To solve the above technical problems, the technical solution adopted by the utility model is: a local reinforcement structure for municipal roads, including a foundation pit. A steel frame is arranged at the center of the foundation pit. A number of anchor holes are arranged on both sides of the foundation pit. The overall shape of the foundation pit is an inverted "soil" shape, with two steps arranged up and down. The two steps are the first step and the second step respectively.
[0006] Preferably, an upper steel mesh is arranged above the first step, and a lower steel mesh is arranged above the second step. The area of the upper steel mesh is larger than that of the lower steel mesh. A plurality of fixing bars are arranged at the center of the lower steel mesh. The tail of the fixing bar is hooked on the cross beam of the lower steel mesh. The top of the fixing bar extends outside the upper steel mesh through the holes of the upper steel mesh. A nut is threadedly connected to the top of the fixing bar. A gasket is arranged between the lower part of the nut and the upper steel mesh. A through hole is formed at the center of the gasket. The top of the fixing bar passes through the through hole of the gasket and is movably connected therebetween. By tightening the nut, the fixing bar moves upward, so that the lower steel mesh receives an upward pulling force. Due to the self-gravity of the lower steel mesh, a fixed connection is formed among the lower steel mesh, the upper steel mesh and the fixing bar;
[0007] Preferably, a reinforcing bar is arranged at the center of the anchor hole. The tail of the reinforcing bar is provided with a roadbed, and the tail of the reinforcing bar is tapered into the roadbed. The top of the reinforcing bar is fixedly connected to the cross beam of the upper steel mesh;
[0008] Preferably, stones are filled below the lower steel mesh, concrete is filled between the lower steel mesh and the upper steel mesh, and the concrete is poured to the top of the upper fixing bar. Asphalt is filled at the upper end of the concrete;
[0009] Preferably, the anchor hole is filled with concrete.
[0010] Due to the adoption of the above technical solutions, the technical progress obtained by the present utility model compared with the prior art is as follows:
[0011] 1. The present utility model provides a local reinforcement structure for a municipal road. Through the upper and lower two-layer steel meshes and the functions of the fixing bars and the reinforcing bars, the concrete is firmly fixed together, preventing the road surface from being fractured and damaged due to the fracture of the concrete in the later stage.
[0012] 2. The present utility model provides a local reinforcement structure for a municipal road, making the excavated foundation pit in an inverted "soil" character structure, divided into two steps, so that each step has a bearing effect on the road surface. The anchor pits on both sides of the foundation pit penetrate into the roadbed, strengthening the structure of the roadbed, making the structure of the repaired road more stable and preventing secondary settlement. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 is a local reinforcement structure for a municipal road of the present utility model;
[0014] Figure 2 is a schematic diagram of the foundation pit structure of the present utility model;
[0015] Figure 3 is a schematic diagram of the steel bar framework structure of the present utility model;
[0016] Figure 4 Structural schematic diagram of the fixing rib and the reinforcing rib of the present utility model;
[0017] Figure 5 Construction effect drawing of the present utility model;
[0018] In the figure: 1, foundation pit; 11, first step; 12, second step; 2, anchor hole; 3, steel bar framework; 31, lower steel bar mesh; 32, upper steel bar mesh; 33, gasket; 34, nut; 35, fixing rib; 36, reinforcing rib; 41, roadbed; 42, gravel; 43, concrete; 44, asphalt. Specific embodiments
[0019] To make the technical means, creative features, achieved purposes and effects of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments:
[0020] As Figure 1 、 2 shown, a local reinforcement structure for a municipal road includes a foundation pit 1. A steel bar framework 3 is provided at the center of the foundation pit 1. Through the steel bar framework, the structure of the later poured concrete 43 can be made more stable, and the strength of the roadbed can be higher. A number of anchor holes 2 are provided on both sides of the foundation pit 1. The number of anchor holes can be determined according to the size of the road surface and can be appropriately increased or reduced under allowable circumstances. The overall shape of the foundation pit 1 is an inverted "soil" shape, with two steps arranged up and down, which are the first step 11 and the second step 12 respectively. The area of the first step 11 is larger than that of the second step 12. Theoretically, the larger the area of the first step 11, the better.
[0021] As Figure 3 、 4As shown, an upper steel mesh 32 is provided above the first step 11, and the area of the upper steel mesh 32 is approximately the same as the area of the first step 11. A lower steel mesh 31 is provided above the second step 12, and the area of the lower steel mesh 31 is approximately the same as the area of the second step 12. The area of the upper steel mesh 32 is larger than the area of the lower steel mesh 31. Several fixing ribs 35 are provided at the center of the lower steel mesh 31. The tail of the fixing ribs 35 is hooked onto the crossbeam of the lower steel mesh 31, and the top of the fixing ribs 35 passes through the upper steel mesh 31. The holes in the reinforcing mesh 32 extend to the outside of the upper reinforcing mesh 32. A nut 34 is threaded to the top of the fixing rib 35. A washer 33 is placed between the nut 34 and the upper reinforcing mesh 32. A through hole is formed in the center of the washer 33. The top of the fixing rib 35 passes through the through hole of the washer 33, forming a movable connection. Tightening the nut 34 causes the fixing rib 35 to move upwards, thereby subjecting the lower reinforcing mesh 31 to an upward pulling force. Due to the weight of the lower reinforcing mesh 31, a fixed connection is formed between the lower reinforcing mesh 31, the upper reinforcing mesh 32, and the fixing rib 35. The number of fixing ribs 35 can be determined according to the area of the reinforcing mesh. The fixing ribs 35 can combine the upper reinforcing mesh 32 and the lower reinforcing mesh 31 into a whole, greatly enhancing the strength of the concrete 43 after pouring. Simultaneously, the hook design at the end of the fixing rib 35 facilitates assembly by construction workers, accelerating road construction.
[0022] The binding of steel mesh is an existing technology, which mainly involves forming a mesh structure by combining the steel bars together. The specific binding method will not be described further.
[0023] like Figure 5 As shown, the lower steel mesh 31 is filled with gravel 42. The laying of gravel 42 can strengthen the roadbed structure and has a buffering effect. When vehicles pass over the road, gravel 42 can effectively reduce the impact of vehicles on the road surface. The space between the lower steel mesh 31 and the upper steel mesh 32 is filled with concrete 43, and the concrete 43 is poured to the top of the fixing bar 35. The concrete 43 has strong structural strength and is not easily damaged. After the poured concrete 43 has solidified, it forms a whole and will not be dispersed by water flow, causing secondary sinking. The upper end of the concrete 43 is filled with asphalt 44. The road surface is filled with asphalt 44 to restore the original road appearance and because asphalt 44 has better friction with tires than concrete 43, it is more conducive to vehicle braking and can maximize the maintenance of road safety. The center of the anchor hole 2 is filled with concrete 43.
[0024] The working principle of this municipal road reinforcement structure will be explained in detail below:
[0025] like Figure 1-5As shown, after the construction workers have cleared the damaged road and jointly processed the underground river and water flow on the road, a foundation pit 1 in the shape of an inverted "tu" character needs to be dug on the road. After the excavation, the surface of the foundation pit is tamped, especially the lower surface of the foundation pit 1. Then, gravel 42 is filled into the foundation pit 1, and it should be noted that the filling height of the gravel 42 should not be higher than the second step 12. Next, the lower steel mesh 31 is laid on the second step. The steel bars are tied firmly with binding wire to prevent the steel bars from being misaligned during the pouring of concrete 43. Then, the anchor holes 2 are excavated on both sides of the first step 11. The deeper the depth of the anchor holes 2, the better. Next, the upper steel mesh 32 is laid. After the upper steel mesh is laid, the installation of the fixing bars 35 begins. Pass through the upper steel mesh 32, hook the tail end of the fixing bar 35 to the cross beam of the lower steel mesh 31, and then pass the top end of the fixing bar 35 through the central hole of the gasket 33, so that the gasket 33 lies horizontally on the cross beam of the upper steel mesh 32. Then, tighten the nut 34. After the installation of the fixing bars 35 is completed in sequence, the tail of the reinforcing bar 36 is tapered into the roadbed 41, and the top end of the reinforcing bar 36 is hooked to the cross beam of the upper steel mesh 32. After the installation of the reinforcing bars is completed in sequence, the concrete 43 is poured into the foundation pit, and the pouring height of the concrete 43 should exceed the top of the fixing bars. The poured concrete 43 is vibrated solid with a machine. After the concrete 43 solidifies, asphalt is laid on the upper surface of the concrete 43, and the height of the asphalt should be flush with the original road.
[0026] The above generally describes the present utility model in detail. However, based on the present utility model, some modifications or improvements can be made, which are obvious to those of ordinary skill in the technical field. Therefore, modifications or improvements that do not depart from the spirit and idea of the present utility model are within the protection scope of the present utility model.
Claims
1. A partial reinforcement structure for municipal roads, comprising a foundation pit (1), characterized in that: A steel bar framework (3) is arranged at the center of the foundation pit (1). A number of anchor holes (2) are arranged on both sides of the foundation pit (1). The overall shape of the foundation pit (1) is an inverted "soil" shape, with two steps arranged vertically. The two steps are the first step (11) and the second step (12) respectively.
2. The municipal road partial reinforcement structure according to claim 1, characterized in that: An upper steel mesh (32) is arranged above the first step (11), and a lower steel mesh (31) is arranged above the second step (12). The area of the upper steel mesh (32) is larger than the area of the lower steel mesh (31). A number of fixing bars (35) are arranged at the center of the lower steel mesh (31). The tail of the fixing bar (35) is hooked on the cross beam of the lower steel mesh (31). The top of the fixing bar (35) extends outside the upper steel mesh (32) through the holes of the upper steel mesh (32). A nut (34) is threadedly connected to the top end of the fixing bar (35). A gasket (33) is arranged between the nut (34) and the upper steel mesh (32) below. A through hole is opened at the center of the gasket (33). The top end of the fixing bar (35) passes through the through hole of the gasket (33) and is movably connected therebetween. By tightening the nut (34), the fixing bar (35) moves upward, so that the lower steel mesh (31) is subjected to an upward pulling force. Due to the self-weight of the lower steel mesh (31), a fixed connection is formed among the lower steel mesh (31), the upper steel mesh (32) and the fixing bar (35).
3. The municipal road partial reinforcement structure according to claim 1, characterized in that: A reinforcing bar (36) is arranged at the center of the anchor hole (2). A roadbed (41) is arranged at the tail of the reinforcing bar (36), and the tail of the reinforcing bar (36) is tapered into the roadbed (41). The top of the reinforcing bar (36) is fixedly connected to the cross beam of the upper steel mesh (32).
4. The municipal road partial reinforcement structure according to claim 2, characterized in that: Gravel (42) is filled below the lower steel mesh (31). Concrete (43) is filled between the lower steel mesh (31) and the upper steel mesh (32), and the concrete (43) is poured to the top end of the fixing bar (35). Asphalt (44) is filled at the upper end of the concrete (43).
5. A partial reinforcement structure for municipal roads according to claim 1, characterized in that... The center of the anchor hole (2) is filled with concrete.