Earth work grille for reinforcing highway foundation and its use method

Abstract

The invention provides a geotechnical grille for reinforcing highway subgrade, as well as an application method thereof. A grille net is formed by vertically and horizontally weaving high-strength and high-modulus polyvinyl chloride polymers, so as to increase the tensile strength of reinforced belts; an outer layer of the grille is coated with a modified rubber coating; rubber is mixed with anti-aging agent, antioxidant, light screener and other master batches, so as to increase the creep resistance and corrosion resistance of the reinforced belts; surface layers of the longitudinal and transverse reinforced belts of the grille are provided with coil-shaped embossed threads so as to increase friction force with soil; meshes of the grille are round so as to reduce stress concentration and increase the extensibility of the reinforced belts; and nodes of the reinforced belts of the grille are provided with bilateral strengthening columns, so as to stop the slippage between soil body and the grille, increase the shearing resistance of the subgrade, balance settlement and prevent the grille from being pulled out of the subgrade. The geotechnical grille has the advantages that the grille is high in the strength of polymer materials, little in creep because of the modified rubber smeared outside, high in tensile strength and low in tensile strain, and the round meshes, the threads of the reinforced belts and the strengthening columns fully occlude the soil body so as to form a space compound strengthening structure, thereby improving the entire shearing strength and settlement balancing performance of the subgrade.

Description

technical field [0001] The invention relates to a geotechnical grid capable of increasing the strength of road subgrade and making the subgrade settle in a balanced manner and a using method thereof, belonging to the technical field of civil engineering. Background technique [0002] In the construction of highway subgrade, slope protection, and dam engineering, the method of adding geosynthetics to the soil is often used, such as geogrid. Through the embedded anchorage of the grid and the soil block and the friction between the grid and the soil, the strength of the soil can be enhanced and the purpose of balanced settlement can be achieved, especially widely used in road subgrades. High-strength polymer geogrids equipped with longitudinal and transverse ribs and hole structures are applied to civil engineering such as highway and railway subgrades, slope anti-seepage and landslides, and river embankment revetment, which increases the life of the project. At present, geogr...

AI Technical Summary

Problems solved by technology

Plastic geogrid has simple process and low cost, but it will show serious creep after long-term use, resulting in the degradation of structural stability

Fabric geogrid has good performance and strong creep resistance, but the process is cumbersome and expensive

At present, the main problem of geogrid used in road embankment is: the horizontally arranged grid is easy to move horizontally in the soil, and cannot effectively reinforce the soil. After the road has been in operation for a long time, it is not the grid that is broken. That is, the grille is pulled out of the subgrade, causing secondary damage to the slope protection

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