A box-type modular layered composite anti-boarding sand pad unit on the top of a shed cave and its construction method

Abstract

The invention provides a box-type modular layered composite anti-sand mat unit, including: a bottom frame, a column, a corrugated thin steel plate, bolts, pads, and a waterproof film layer; the angle steels can be connected by bolts, and the The spacers form columns with slots. A box unit is erected by four uprights, and the corrugated thin steel plates are inserted into the slots of the uprights in layers to form the box wall. After each layer is filled with sand and gravel, a waterproof membrane layer is laid on the upper part to form an independent unit of the composite sand cushion. The beneficial technical effects of the present invention are: the waterproof film layer can effectively prevent the hardening of the cushioning sand cushion, give full play to the cushioning effect of the sand cushion, realize prefabrication and modularization, facilitate replacement and improve adaptability.

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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