Roadway or tunnel surrounding rock shielding protection structure and method

Abstract

The invention discloses a roadway or tunnel surrounding rock shielding protection structure and method. Under the action of ground pressure, bare surrounding rocks are formed after a roadway or tunnelis excavated and formed. The invention provides a multilayer combined shielding protection structure and method; a special shielding layer is constructed by injecting a special shielding material; afine bamboo concrete layer is constructed by pouring fine bamboo concrete; an energy absorption controller is provided to build an energy absorption control layer and a bracket which is shaped like aChinese character ''ya'' and is constructed by a steel pipe support is erected; the roadway or tunnel surrounding rock shielding protection structure jointly formed by the multilayer protection structures plays a good supporting protection effect on the bare roadway or tunnel surrounding rocks, the damage of the impact stress wave can be effectively shielded, a remarkable toughness energy absorption effect on the impact energy is achieved, the residual energy can be further absorbed through the energy absorption controller and the bracket which is shaped like the Chinese character ''ya'', theimpact failure of the roadway or tunnel is avoided, and the safety of the roadway or tunnel can be effectively protected.

Description

technical field

[0001] The invention belongs to the technical field of mine protection, and in particular relates to a roadway or tunnel surrounding rock shielding protection structure and method. Background technique

[0002] With the rapid development of my country's economic construction, the investment in transportation infrastructure continues to increase, especially after highways and high-speed railways enter mountainous areas, a large number of tunnel projects are built. my country is also a country with many earthquakes, and most of the tunnels are routed along rivers and mountains, and there are often unfavorable conditions such as surrounding rock fragmentation, terrain bias, and even the possibility of landslides along the route. Especially when the overlying surrounding rock is affected by excavation vibration and some stress waves, it is very easy to cause geological disasters such as landslides and collapses, which will lead to difficulties in tunnel excavatio...

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