Composite lining suitable for surrounding rock after-deformation

Abstract

The invention relates to a complex lining adaptive to the great deformation of adjacent rock, relating to underground engineering supporting structure. To resolve the problem that existing linings is no suitable for the evening converge and fracture deformation, the invention discloses a complex lining which includes inner layer and outer layer, the inner layer is concrete layer of thickness 30 to 200 cm and is a rigid layer, the outer layer is a filling layer filled with dirt, rock, sand, and water with a thickness of 30 -150 cm, and is a soft layer. The complex lining adapts the fracture deformation with its deformable outer layer while providing proper support to the adjacent rock protecting inner layer and supporting adjacent rock to stabilize the rock.

Description

[0001] Field:

[0002] The invention relates to a composite lining adaptable to the later deformation of surrounding rock, which belongs to the field of underground engineering supporting structures. Background technique:

[0003] In underground engineering such as hydraulic tunnels, traffic tunnels and mine roadways, lining is one of the supporting measures to protect the safety of underground spaces and control the stability of surrounding rocks. The current lining is mainly made of concrete (including reinforced concrete), which is characterized by rigidity. It is generally required to be close to the surrounding rock. If there is a gap between the surrounding rock and the lining, it is also required to use the method of backfilling and grouting. The gap is filled, and the backfill material is generally concrete or cement mortar, which is also rigid after solidification. When the surrounding rock deforms, the lining will immediately generate supporting reaction force to re...

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