Why is the road paved with geomembrane?
Strengthen the stability of the base soil: The base soil of the road often faces problems such as insufficient bearing capacity, easy loosening and collapse. The laying of geomembrane can increase the shear strength and stability of the base soil to a certain extent, prevent the settlement and deformation of the soil, and improve the bearing capacity and service life of the road.
Prevent water infiltration: Water is the natural enemy of road materials. If water infiltrates into the base soil of the road, it will cause the soil to soften, swell, and lose its bearing capacity, which in turn will cause problems such as road potholes, cracks, and deformation. Geomembrane has excellent waterproof performance, which can effectively prevent water penetration and erosion, and maintain the stability and compactness of the soil.
Separation and prevention of mutual penetration of concrete and roadbed materials: In road construction, it is often necessary to set a separation layer between the roadbed and the concrete substrate to avoid mutual penetration and cross-action between roadbed soil and concrete. As a separation layer, geomembrane can effectively isolate the two and improve the stability and durability of the road structure.
Reduce road surface repair and maintenance costs: Roads are often affected by vehicle transportation, climate and groundwater, and are prone to cracks, potholes, scours, etc., requiring frequent repairs and maintenance. The laying of geomembrane can effectively reduce the deformation and settlement of the road base soil, and reduce the maintenance workload and maintenance cost of the road surface.
Environmental protection: Some road materials may contain harmful substances, such as heavy metals, etc. As an isolation layer, geomembrane can prevent the penetration and leakage of harmful substances, play a role in environmental protection, and protect the safety and quality of soil and groundwater.
To sum up, laying geomembranes on roads can increase the stability of the base soil, prevent water infiltration, separate the interpenetration between different materials, reduce repair and maintenance costs, and protect the safety of the environment. These can improve the service life and reliability of the road.
What are the steps of laying geomembrane on the road?
The purpose of laying geomembrane on the road is to enhance the stability of the base soil and prevent water infiltration. The following are the steps for laying geomembrane on general roads:
Preparation: Clean up the sundries and dirt on the original surface of the road, and ensure that the base soil is flat, dry and clean. Remove any depressions or loose soil that may exist on the road base, and repair cracks and potholes.
Determine the size and quantity of geomembrane: According to the size and design requirements of the road, measure the required geomembrane size. Generally, the geomembrane should cover the entire surface of the base soil, and leave enough excess at the edge to ensure connection and fixation with other materials.
Laying geomembrane: roll out the geomembrane and lay it on the soil of the road base, making sure that the membrane material is close to the ground surface without obvious wrinkles. The geomembrane can be secured to the road with weights or other equipment to keep it from moving.
Docking and fixing: If you need to connect multiple geomembranes, butt the edges of adjacent geomembranes, and use special geomembrane adhesives or welding equipment to connect them together to ensure tight connection and no leakage.
Fix the geomembrane: between the edge of the geomembrane and the edge of the road, use heavy objects, slope protection stones or anchor bolts to fix the geomembrane. This helps prevent movement of the geomembrane, ensuring it remains firmly on top of the underlying soil.
Covering filler: After the laying of the geomembrane is completed, the required filler layer is covered on the geomembrane according to the design requirements. The fill layer can be gravel, crushed stone or other material to provide extra support and stability and prepare the road surface for the pavement layer above.
Please note that specific road laying geomembrane steps may vary depending on the type of geomembrane material, road design requirements and construction specifications. It is best to consult a professional civil engineer or construction team before proceeding with road laying with geomembranes to ensure proper laying process and compliance with relevant codes.