Anti-settling high liquid limit soil roadbed reinforcing structure
By employing a combination of reinforcement components and drainage layers in high liquid limit soil subgrades, the settlement problem caused by high liquid limit soil was solved, thereby improving stability and bearing capacity and reducing maintenance costs.
Patent Information
- Application Number
- CN202520604209.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-02
- Publication Date
- 2026-03-06
- Estimated Expiration
- 2035-04-02
AI Technical Summary
Existing technologies that simply compact soils with high liquid limit fail to fundamentally improve their undesirable properties, resulting in a high risk of roadbed settlement and increased road maintenance costs.
The reinforcement components include connecting frames, reinforcement plates, fixing plates, and drainage holes. Through the combination of reinforcement treatment layers, drainage layers, and improved soil layers, the soil bearing capacity and drainage efficiency are improved, the water content is reduced, and the soil stability and deformation resistance are enhanced.
It effectively reduces the later maintenance cost of roads, improves the stability and bearing capacity of high liquid limit soil subgrades, and reduces settlement deformation.
Smart Images
Figure CN223974441U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of high liquid limit soil subgrade for anti-settlement, and in particular to a high liquid limit soil subgrade reinforcement structure for anti-settlement. Background Technology
[0002] High liquid limit soil refers to fine-grained soil with a liquid limit greater than 50%. In engineering, the three indicators for identifying high liquid limit soil are: the content of particles smaller than 0.075mm is greater than 50%, the liquid limit is greater than 50%, and the plasticity index is greater than 26.
[0003] When high liquid limit soils are used for roadbed filling, their high water content makes it difficult to achieve the ideal compaction degree during the compaction process, easily leading to a "spring" phenomenon and compromising the quality of roadbed compaction. Simultaneously, the high plasticity of high liquid limit soils makes them prone to plastic flow under external forces, making it difficult to maintain a stable shape and thus affecting the stability of the roadbed. Furthermore, their poor permeability makes it difficult for water to drain from the soil, resulting in the roadbed remaining saturated for extended periods, further reducing soil strength and increasing the risk of roadbed settlement.
[0004] Currently, traditional roadbed treatment methods, when dealing with high liquid limit soils, simply compact the soil, failing to fundamentally improve its undesirable properties. This results in significant settlement of the roadbed during use, increasing the later maintenance costs. Therefore, a settlement-resistant roadbed reinforcement structure for high liquid limit soils is proposed to address these issues. Utility Model Content
[0005] To overcome the above shortcomings, this utility model provides a high liquid limit soil subgrade reinforcement structure for preventing settlement, aiming to solve the problem in the prior art that "simply compacting the high liquid limit soil fails to fundamentally improve its adverse properties and increases the later maintenance cost of the road".
[0006] To achieve the above objectives, this utility model adopts the following technical solution: a high liquid limit soil subgrade reinforcement structure for anti-settlement, comprising a bottom layer, a reinforcement treatment layer on top of the bottom layer, a drainage layer on top of the reinforcement treatment layer, an improved soil layer on top of the drainage layer, a roadbed on top of the improved soil layer, a road surface on top of the roadbed, a reinforcement component on the inner side of the drainage layer and the improved soil layer, the reinforcement component comprising a connecting frame, the connecting frame being disposed between the drainage layer and the improved soil layer, a reinforcement plate being fixedly connected to the outer side of the connecting frame, fixing plates being fixedly connected to both the left and right sides of the connecting frame, and a connecting plate being fixedly connected to the outer front part of the fixing plate.
[0007] As a further description of the above technical solution:
[0008] The reinforcement component also includes drainage holes, which are located on the outer side of the fixing plate near the drainage layer and are inclined downwards.
[0009] As a further description of the above technical solution:
[0010] The reinforcement component also includes a fixed grid, which is fixedly connected to the side of the fixed plate near the bottom layer and is embedded inside the reinforcement treatment layer and the improved soil layer.
[0011] As a further description of the above technical solution:
[0012] The reinforcement layer is made of geocells and sandy soil or gravelly soil.
[0013] As a further description of the above technical solution:
[0014] The drainage layer is made of gravel material.
[0015] As a further description of the above technical solution:
[0016] The improved soil layer contains lime and cement.
[0017] As a further description of the above technical solution:
[0018] The reinforcing plate has holes through its outer side and is fitted into the drainage layer and the improved soil layer.
[0019] This utility model has the following beneficial effects:
[0020] 1. In this utility model, by using the reinforcement component, when reinforcing high liquid limit soil, the connecting frame and the reinforcement plate are fixed in the drainage layer and the improved soil layer, and the fixing plate is horizontally supported and fixed, so that the fixing plate sways less. At the same time, the drainage holes on the fixing plate can drain the water in the drainage layer, thereby improving the stability of the high liquid limit soil subgrade and reducing the later maintenance cost of the road.
[0021] 2. In this utility model, by using various layered structures and reinforcement components in combination, and by laying reinforcement treatment layer, drainage layer and improved soil layer in sequence, the bearing capacity of the soil is improved, the settlement deformation caused by high liquid limit soil characteristics is reduced, the water in the drainage layer is quickly guided out of the roadbed, the drainage speed is accelerated, the water content of the soil is reduced, the soil structure is improved, the soil particles are cemented together, the strength, stability and deformation resistance of the soil are improved, and the bearing performance of the roadbed is enhanced. Attached Figure Description
[0022] Figure 1 This is a three-dimensional structural diagram of the overall device in this utility model;
[0023] Figure 2 This is a three-dimensional structural diagram of the connecting frame and fixing plate in this utility model;
[0024] Figure 3 This is a front-view three-dimensional cross-sectional view of the fixing plate in this utility model.
[0025] Legend:
[0026] 1. Subbase; 2. Reinforcement layer; 3. Drainage layer; 4. Improved soil layer; 5. Subgrade; 6. Road surface; 7. Reinforcement components; 71. Connecting frame; 72. Reinforcement plate; 73. Fixing plate; 74. Connecting plate; 75. Drainage hole; 76. Fixing grid. Detailed Implementation
[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0028] Reference Figure 1 - Figure 3 This utility model provides an embodiment of a high liquid limit soil subgrade reinforcement structure for settlement prevention, comprising a bottom layer 1, which serves as the foundation of the entire road structure, bearing the weight from the pavement 6, vehicle loads, and the upper structural layers, and transferring these loads to the foundation. A reinforcement layer 2 is provided above the bottom layer 1, and the reinforcement layer 2 is made of geocells and sandy soil or gravelly soil. The geocells have a three-dimensional honeycomb structure, which can effectively limit the lateral displacement of soil particles, enhance the integrity and stability of the soil, and act as a stable frame for the soil. The structure consists of sandy soil or gravelly soil with good permeability and certain strength, which can further enhance the bearing capacity of the soil and reduce settlement and deformation caused by the characteristics of high liquid limit soil. A drainage layer 3 is set on the top of the reinforcement treatment layer 2. The drainage layer 3 is made of sandy gravel material with large pores between particles and strong permeability. Its main function is to quickly drain the water inside the roadbed, prevent water from accumulating in the roadbed, reduce the water content of high liquid limit soil, thereby maintaining the strength and stability of the soil and reducing the softening and settlement of the roadbed caused by water soaking. An improved soil layer 4 is set on the top of the drainage layer 3.
[0029] Reference Figure 2 and Figure 3The improved soil layer 4 contains lime and cement, which react with the soil to reduce its moisture content, improve its structure, bind soil particles together, and enhance its strength, stability, and resistance to deformation, thereby increasing the bearing capacity of the roadbed. A subgrade 5 is laid on top of the improved soil layer 4, serving as the foundation for the road surface 6 and bearing the traffic load transmitted by the road surface 6. The road surface 6 is laid on top of the subgrade 5, isolating the roadbed from the external environment and preventing rainwater and debris from directly eroding the roadbed structure. It also distributes vehicle loads to the subgrade 5 and the underlying structural layers. Reinforcing components 7 are installed inside the drainage layer 3 and the improved soil layer 4. Each reinforcing component 7 includes a connecting frame 71, arranged in pairs to support the reinforcing plate 72. The connecting frame 71 is positioned between the drainage layer 3 and the improved soil layer 4.
[0030] Reference Figure 1 - Figure 3 A reinforcing plate 72 is fixedly connected to the outside of the connecting frame 71. Holes are opened through the outside of the reinforcing plate 72. The reinforcing plate 72 is embedded in the inside of the drainage layer 3 and the improved soil layer 4. The holes and the reinforcing plate 72 can tightly connect the drainage layer 3 and the improved soil layer 4, so that the two work together, enhance the integrity of the entire structural layer, and effectively transfer and distribute the load. Fixing plates 73 are fixedly connected to both sides of the connecting frame 71. They are welded to the connecting frame 71 and set on the slopes on both sides of the roadbed to fix the various layer structures. At the same time, the connecting frame 71 improves the stability of the fixing plates 73 after installation and reduces the maintenance cost of the road in the later stage. A connecting plate 74 is fixedly connected to the front outer side of the fixing plate 73 to seal the gap between adjacent fixing plates 73 to prevent water leakage and realize the modular installation of the reinforcing component 7.
[0031] Reference Figure 2 and Figure 3 The reinforcement component 7 also includes drainage holes 75, which are located on the outer side of the fixing plate 73 near the drainage layer 3. These drainage holes guide water from the drainage layer 3 out of the roadbed, accelerating drainage and preventing water accumulation from damaging the roadbed structure. This enhances the effectiveness of the drainage system. The drainage holes 75 are angled downwards to prevent rainwater from flowing back into the roadbed, reducing the later maintenance costs of the road. The reinforcement component 7 also includes a fixing grid 76, which is fixedly connected to the side of the fixing plate 73 near the bottom layer 1. The fixing grid 76 is embedded inside the reinforcement treatment layer 2 and the improved soil layer 4. The fixing grid 76 can enhance the connection between the reinforcement component 7 and the layer structure, constrain the lateral displacement of the soil, prevent slippage or sliding between soil layers, improve the overall structural stability of the roadbed, and reduce the later maintenance costs of the road.
[0032] Working principle: During use, a reinforcement layer 2 is laid on the bottom layer 1, which is composed of geocells and sandy soil or gravelly soil. This further enhances the soil bearing capacity and reduces settlement deformation caused by the characteristics of high liquid limit soil. A drainage layer 3 is laid on top of the reinforcement layer 2. It is made of sand and gravel material with large pores between particles and strong water permeability. When there is water accumulation in the subgrade, it can quickly drain the water, avoid water accumulation leading to an increase in the water content of high liquid limit soil, maintain soil strength, and prevent the subgrade from softening and settling due to water immersion.
[0033] Improved soil layer 4 is laid on top of drainage layer 3. Lime and cement are added to reduce the soil moisture content, improve the soil structure, bind soil particles together, improve the soil strength, stability and deformation resistance, and enhance the bearing capacity of the subgrade. Roadbed 5 and road surface 6 are laid on top of improved soil layer 4.
[0034] When laying the drainage layer 3 and the improved soil layer 4, the connecting frame 71 and the reinforcing plate 72 are placed in the drainage layer 3 and the improved soil layer 4. The holes on the outside of the reinforcing plate 72 enable the drainage layer 3 and the improved soil layer 4 to work closely together, transferring and distributing the load. The fixing plate 73 is welded and fixed to the connecting frame 71 on both sides of the roadbed slope, which plays a role in fixing each layer of the structure, including the reinforcement treatment layer 2, the drainage layer 3, the improved soil layer 4 and the roadbed 5. At the same time, the fixing grid 76 fixed on the fixing plate 73 is embedded in each layer of the structure, which enhances the connection between the reinforcement component 7 and each layer of the structure, restrains the lateral displacement of the soil, prevents the soil layers from shifting or sliding, and improves the overall structural stability of the roadbed.
[0035] The connecting frame 71 improves the stability of the fixing plate 73 after installation. The connecting plate 74 seals the gap between adjacent fixing plates 73 to prevent water leakage and realizes the modular installation of the reinforcement component 7. The drainage hole 75 opened on the fixing plate 73 near the outside of the drainage layer 3 guides the water in the drainage layer 3 out of the roadbed and speeds up the drainage speed.
[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A sedimentation-preventing high liquid limit soil subgrade reinforcement structure comprising a bottom layer (1), characterized in that: The bottom layer (1) is provided with a reinforced treatment layer (2) on the upper part, the reinforced treatment layer (2) is provided with a drainage layer (3) on the upper part, the drainage layer (3) is provided with an improved soil layer (4) on the upper part, the improved soil layer (4) is provided with a roadbed (5) on the upper part, the roadbed (5) is paved with a pavement (6) on the upper part, the drainage layer (3) and the improved soil layer (4) are provided with a reinforcing assembly (7) on the inner side; The reinforcing assembly (7) comprises a connecting framework (71), the connecting framework (71) is arranged between the drainage layer (3) and the improved soil layer (4), the connecting framework (71) is fixedly connected with a reinforcing plate (72) on the outer side, the connecting framework (71) is fixedly connected with a fixed plate (73) on the left and right sides, and the fixed plate (73) is fixedly connected with a connecting plate (74) on the outer side of the front part.
2. A sedimentation resistant high liquid limit soil subgrade reinforcement structure according to claim 1, characterized in that: The reinforcing assembly (7) further comprises a drainage hole (75), the drainage hole (75) is arranged on the outer side of the fixed plate (73) close to the drainage layer (3), and the drainage hole (75) is arranged in an inclined downward manner.
3. A sedimentation resistant high liquid limit soil subgrade reinforcement structure according to claim 1, characterized in that: The reinforcing assembly (7) further comprises a fixed grid (76), the fixed grid (76) is fixedly connected to one side of the fixed plate (73) close to the bottom layer (1), and the fixed grid (76) is embedded in the inner side of the reinforced treatment layer (2) and the improved soil layer (4).
4. A sedimentation resistant high liquid limit soil subgrade reinforcement structure according to claim 1, characterized in that: The reinforced treatment layer (2) is made of geocell and sandy soil or gravel soil material.
5. A sedimentation resistant high liquid limit soil subgrade reinforcement structure according to claim 1, characterized in that: The drainage layer (3) is made of sand and gravel material.
6. A sedimentation resistant high liquid limit soil subgrade reinforcement structure according to claim 1, characterized in that: The improved soil layer (4) is added with lime and cement.
7. A sedimentation resistant high liquid limit soil subgrade reinforcement structure according to claim 1, characterized in that: The outer side of the reinforcing plate (72) is provided with a hole, and the reinforcing plate (72) is embedded in the inner side of the drainage layer (3) and the improved soil layer (4).