Characteristics of Geocell
High Strength: Made of high-strength geosynthetic materials, it can withstand large loads. In mountain road construction, it can effectively disperse the pressure of vehicle loads and other loads on the subgrade.
Flexibility: It has a certain degree of flexibility and can adapt to the topographical changes and uneven settlement of mountain roads, maintaining the structural stability.
Lateral Constraint Effect: The honeycomb structure of the geocell has a good lateral constraint effect on the filling materials, which can prevent the lateral displacement and loss of the filling materials and improve the overall stability of the subgrade.
Applications in Mountain Road Construction
Subgrade Reinforcement: Laying geocell on the subgrade of mountain roads can enhance the bearing capacity of the subgrade. When it is laid on a soft foundation and then filled with materials such as crushed stones and sand, the geocell can restrict the flow of the filling materials, making the subgrade denser and more stable, and reducing the settlement and deformation of the subgrade. It is especially suitable for dealing with poor foundations such as soft soil and collapsible loess commonly found in mountain roads.
Slope Protection: When used for the slopes of mountain roads, geocell can fix the soil and stones on the slope surface. By laying the geocell on the slope, filling it with vegetation soil and sowing grass seeds, it can not only prevent soil erosion and landslides on the slope surface, but also achieve greening and environmental protection through the growth of vegetation, beautify the environment of the mountain road, and play a dual role in slope stabilization and ecological protection.
Drainage and Filtration: In the drainage system of mountain roads, geocell can be used as a drainage channel and a filtration layer. When used in conjunction with drainage pipes and filled with materials with good water permeability inside the geocell, it can quickly drain the accumulated water in the subgrade, and at the same time prevent soil particles from entering the drainage system, ensuring smooth drainage and extending the service life of the drainage facilities.
Construction Key Points
Site Preparation: Before construction, the construction site of the mountain road needs to be cleared, removing weeds, tree roots and other obstacles. The foundation should be leveled and compacted to ensure that the surface of the foundation is flat and solid, meeting the design requirements.
Geocell Laying: Unfold the geocell according to the design requirements and lay it along the direction of the subgrade or slope. Pay attention to the firm connection of the geocell. Welding, riveting or binding and other methods can be used to ensure that the geocell will not be separated or torn during use.
Selection and Filling of Filling Materials: Select suitable filling materials such as crushed stones, sand, and planting soil according to the project requirements. When filling, pay attention to the particle size and gradation of the materials to ensure uniform filling and avoid uneven local stress on the geocell. Adopt the method of layered filling, and the thickness of each layer of filling should not be too large. Compact while filling to make the filling materials closely combined with the geocell.
Slope Protection Construction: If it is used for slope protection, after the geocell is filled, carry out greening work in a timely manner, such as planting vegetation or laying turf. Select plant varieties suitable for the local climate and soil conditions to ensure the survival rate and growth effect of the vegetation, so as to achieve the goal of long-term slope stabilization.
Drainage System Setting: Reasonably set up the drainage system in combination with the topography and drainage requirements of the mountain road. Set up drainage blind ditches, side ditches and other facilities at the edge or inside of the geocell to ensure that rainwater and groundwater can be smoothly drained out of the subgrade area and avoid the damage to the subgrade and the geocell structure caused by accumulated water.
Quality Control and Inspection
Material Quality Inspection: Before construction, conduct quality inspections on the geocell and filling materials. Check whether the physical and mechanical performance indicators of the geocell, such as tensile strength, tear strength, burst strength, etc., meet the design requirements. The indicators such as the particle size, gradation, and mud content of the filling materials should also meet the relevant standards.
Quality Control during Construction: During the construction process, strictly operate in accordance with the construction specifications and design requirements. Check the laying flatness of the geocell, the firmness of the connection, and the compactness of the filling materials, etc. Regularly inspect the completed project parts and rectify the problems found in a timely manner.
Inspection after Completion: After the project is completed, conduct a comprehensive inspection of the subgrade, slope and other parts of the mountain road, including the inspection of indicators such as the compactness and deflection value of the subgrade, and the stability and vegetation coverage rate of the slope. Through on-site inspection and laboratory tests and other methods, verify whether the project quality meets the design standards to ensure the safety and stability of the mountain road.
Geocell can effectively improve the subgrade stability, protect the slope and improve the drainage system in mountain road construction. However, during the construction process, it is necessary to strictly follow the specifications and control the quality of each link to give full play to its role and ensure the project quality and service life of the mountain road.
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