Ground fissure tunnel asphalt concrete composite lining and supporting method thereof

Abstract

The invention discloses a ground fissure tunnel asphalt concrete composite lining, wherein an initial lining, an asphalt concrete composite lining and an inside lining are sequentially arranged in an influence interval of a ground fissure from a surrounding rock soil body to a tunnel axial center, deformation joints A are arranged on the inside lining at intervals along a tunnel axis, injected holes are reserved at the bottom of the inside lining at both sides of the deformation joints A, and a displacement monitor is installed at the outer side of the asphalt concrete composite lining. The invention also discloses a supporting method of the ground fissure tunnel asphalt concrete composite lining, and an asphalt concrete pouring material is prepared by mixing modified asphalt after hot melting with sand and stones by adopting a stepped excavation and mining construction method; an asphalt mastic material is filled in the deformation joints A to flexibly connect the two adjacent segments of inside linings and carry out waterproof processing and the like for construction joints at the section of the inside lining. The composite lining has simple structure, convenient construction, safety and reliability and is suitable for being used in ground fissure active regions or meizoseismal regions.

Description

technical field [0001] The invention belongs to the technical field of tunnel construction and is used for tunnel structures in strong earthquake regions or ground fissure strata, and in particular relates to an asphalt concrete composite lining for ground fissure tunnels, and also relates to a supporting method for the asphalt concrete composite lining for ground fissure tunnels. Background technique [0002] In the construction of cavern structures such as tunnels, complex geological conditions are often encountered, such as ground fissures, goafs, karst caves, and sinkholes. In particular, ground fissures formed and developed based on the development of fault structures and induced by excessive exploitation of groundwater seriously affect the stability of the tunnel lining structure. Specifically, after the upper and lower walls on both sides of the ground fissure are shifted, the subsidence displacement of the tunnel lining structure in the strata and the soil on both si...

AI Technical Summary

Problems solved by technology

To sum up, in view of the impact of ground fissure activity on the tunnel, certain effective structural treatment measures have been taken, but it cannot guarantee that the lining structure will not be damaged or reliably prevent seepage under ground fissure activity or earthquake action.

Images