Box-type modular layered composite anti-hardening sand cushion unit at top of shed tunnel and construction method

Abstract

The invention provides a box-type modular layered composite anti-hardening sand cushion unit. The box-type modular layered composite anti-hardening sand cushion unit comprises a bottom frame, stand columns, corrugated thin steel plates, bolts, cushion blocks and waterproof film layers. The steel angles can be connected through bolts, and the stand columns with the inserting grooves are formed by arranging cushion blocks between the steel angles. A box type unit is erected by four stand columns, and corrugated thin steel plates are inserted into stand column inserting grooves in a layered modeto form a box wall. After each layer is filled with gravel, a waterproof film layer is laid on the upper portion, and a composite sand cushion layer independent unit is formed. The sand cushion has the beneficial technical effects that the waterproof film layer can effectively prevent hardening of the buffer sand cushion layer, the buffer effect of the sand cushion layer is brought into full play,prefabrication and modularization are achieved, replacement is convenient, and adaptability is improved.

Description

technical field [0001] The application belongs to the field of rockfall prevention and control, and in particular relates to a box-type modular layered composite anti-hardening sand pad unit. Background technique [0002] As a mountainous country, my country's transportation construction and development process is often restricted by natural disasters such as dangerous rocks, landslides, and debris flows, especially rockfall disasters, which have the most direct impact on casualties. In recent years, due to frequent earthquakes, rockfall disasters have shown a high incidence trend. Among the many rockfall prevention methods, shed tunnels are one of the most effective and environmentally friendly methods. As a direct structure against falling rocks, the top of the shed is usually equipped with a special buffer cushion, such as the composite structure of the top of the shed that is suitable for buffering and energy-dissipating impacts against rockfalls disclosed in Chinese pa...

AI Technical Summary

Problems solved by technology

[0003] A more economical method is to use sand or gravel to lay a layer of buffer cushion on the top of the shed, and use the deformation and frictional energy dissipation during the collision between the falling rock and the sand and gravel cushion to absorb the impact energy. There are many disadvantages in the sand and gravel cushion. Because the sand and gravel cushion is not waterproof, it will affect the normal use of the shed in rainy weather, and as the use time becomes longer, the sand and gravel are easy to harden after being exposed to the sun and rain. The performance is greatly reduced, and the existing cushion design makes it very difficult to replace the gravel cushion

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