Flexible connecting and sealing bitumastic impervious structure of tunnel deformation joint and constructing method

Abstract

The invention belongs to the technical field of anti-seepage construction, and in particular relates to a flexible connecting and sealing bitumastic anti-seepage structure of a tunnel deformation joint and a constructing method, which can ensure the normal use of a subway tunnel under the action of fracture formation of the ground. In the technical scheme, the method comprises the following steps: laying a composite layer of modified asphalt anti-seepage plate, pouring reinforced concrete for lining, setting deformation joints, mounting flexible baffles in the deformation joints, utilizing glass fiber cloth to seal gaps of the baffles, and pouring bitumastics to fill gaps of the deformation joints. The anti-seepage structure constructed in the method has the anti-seepage performance of the composite layer of modified asphalt anti-seepage plate, the extension performance and the anti-seepage performance of the bitumastics, and the blocking function of the flexible baffles. Therefore, the anti-seepage structure can ensure the effective sealing of the joint and prevent the significant water leakage accident while fully adapting to the large-displacement slipping deformation in the positions with the deformation joints of the composite lining structure, and has high economic and social benefits.

Description

Technical field [0001] The invention belongs to the technical field of building seepage prevention, and specifically relates to a tunnel deformation joint asphalt mastic flexible connection sealing anti-seepage structure and a construction method. Background technique [0002] In the construction of underground structures such as tunnels, complex geological conditions are often encountered, which causes significant uneven settlement of the tunnel, causing large displacements of the lining structure on both sides of the deformation joint, and also seriously affecting the stability of the underground structure. Specifically, the uneven settlement causes additional stress and additional deformation of the structure, while the deformation of the underground structure is too large, which will cause its structural damage and cause leakage, or the destruction of the anti-seepage structure and cause leakage. [0003] The effectiveness of the anti-seepage measures adopted in the tunnel stru...

AI Technical Summary

Problems solved by technology

The reinforced concrete lining in tunnels with ground fissures moves along with the large displacement of the upper and lower wall soils, which makes it difficult for traditional anti-seepage technology and anti-seepage structures to meet the anti-seepage requirements. It is necessary to develop a suitable anti-seepage structure system for ground fissure tunnels

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