When the geotextile is directly laid on the surface of the roadbed or the road groove, the protrusions that may damage the fabric on the roadbed surface and the road groove must be removed first.
Common reinforcement materials: geogrids, geotextiles and georeinforced tapes, etc.
There are two main types of reinforcement in highway engineering:
①The stability of the embankment is insufficient. In order to improve the stability of the embankment and control the settlement of the embankment, geosynthetics are used for embankment reinforcement;
②In order to reduce the uneven settlement between the subgrade and the structure, the subgrade on the back of the platform is reinforced with geosynthetics.
Geosynthetic reinforced soil technology is a new geotechnical technology, but it has developed rapidly. Due to its reasonable structure, good stress conditions, simple construction and significant benefits, it is widely used in various filling projects. It uses synthetic polymers, such as plastics, chemical fibers, synthetic rubber, etc., as raw materials to make various types of products, which are placed inside the soil, on the surface or between layers of soil to strengthen or protect the soil.
Geomembrane is a waterproof barrier material with high molecular polymer as the basic raw material. It has excellent resistance to environmental stress cracking, low-temperature resistance, aging resistance, corrosion resistance, and a large operating temperature range (-60–+60), and long service life (70 years). It is widely used in seepage prevention of domestic waste landfills, seepage prevention of solid waste landfills, seepage prevention of sewage treatment plants, seepage prevention of artificial lakes, tailings treatment, and other seepage prevention projects
Geosynthetics is a general term for synthetic materials used in civil engineering. As a civil engineering material, it uses synthetic polymers (such as plastic, chemical fiber, synthetic rubber, etc.) as raw materials to make various types of products and place them inside, on the surface of, or between various soils. , To play the role of strengthening or protecting the soil.
Geogrid is a major geosynthetic material. Compared with other geosynthetics, it has unique performance and efficacy. Geogrids are often used as reinforcements for reinforced soil structures or composites. Geogrids are divided into two types: polyester/glass fiber geogrid and plastic geogrid.
Geosynthetics Special Products include concrete geomembrane bag, Geonet, Geocell, Geocomposite, high strength geotextile tube etc.
Geosynthetics, different products have different characteristics and can be used in many engineering fields.
It has been applied in geotechnical engineering, civil engineering, water conservancy engineering, environmental engineering, traffic engineering, municipal engineering, land reclamation engineering, etc.
The geotextile roll should be protected from damage before installation and unfolding. Geotextile rolls should be stacked in a flat place with no water, and the height of the stack should not exceed the height of four rolls, and the identification film of the roll can be seen.
Reflective cracks are caused by the large displacement of the old concrete surface near the joints or cracks that cause stress concentration in the asphalt overlay above it. It includes horizontal displacement due to changes in temperature and humidity, and due to traffic loads. The vertical shear displacement is caused by the action. The former causes concentrated tensile stress in the asphalt overlay above the joint or crack; the latter causes the asphalt overlay above the joint to undergo greater flexural tensile stress and shear stress.
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