Method for permanently repairing tunnel lining crack by using UHPC material

Abstract

The invention discloses a method for permanently repairing a tunnel lining crack by using a UHPC material. The method comprises the following steps of S1, cutting the left wall surface, the right wall surface and the bottom of the tunnel lining crack to obtain a main repairing groove with a rectangular cross section; S2, embedding auxiliary parts: transversely placing a butterfly-shaped tie bar in each set of dovetail pair grooves and the main repairing groove communicating with the dovetail pair grooves; S22, embedding a grouting and water supplementing pipe in the end, located at the upper end of a tunnel, of the main repairing groove in a manner of being perpendicular to the bottom of the main repairing groove, enabling the far end of the grouting and water supplementing pipe to be located in a water drainage and water supplementing groove and communicate with the water drainage and water supplementing groove, and embedding a drainage pipe in the end, located at the lower end of the tunnel, of the main repairing groove in a manner of being perpendicular to the bottom of the main repairing groove; S3, filling the main repairing groove and the dovetail pair grooves; and S4, curing a UHPC material filling body, so that repairing of the tunnel lining crack is completed. By the adoption of the method, in-situ treatment is carried out on tunnel lining crack diseases, wet and heated curing conditions are met, permanent repair is achieved, and the tunnel structure safety is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of tunnel disease control, and in particular relates to a method for permanently repairing tunnel lining cracks by using UHPC materials. Background technique [0002] The traditional reinforcement of the tunnel lining structure is to use the lining concrete as the reinforcement object, and take engineering measures such as increasing the cross-section and adding reinforcing materials to improve the bearing capacity of the lining structure, mainly including pasting fiber composite materials, pasting steel plates (steel strips), shotcrete, Reinforcement measures such as embedding steel arches and sleeve arches. However, these methods have some disadvantages: pasting FRP can effectively control the deformation of the lining inner tension zone, but cannot improve the overall rigidity of the structure; pasting steel plate lining can greatly increase the structural rigidity, but it is also faced with heavy self-we...

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Problems solved by technology

However, these methods have some disadvantages: pasting FRP can effectively control the deformation of the lining inner tension zone, but cannot improve the overall rigidity of the structure; pasting steel plate lining can greatly increase the structural rigidity, but it is also faced with heavy self-weight and complex construction, which is not conducive to rapid construction. Construction and other issues

Moreover, the above reinforcement methods all have the problems of high temperature resistance and poor durability. The aging of the organic bonding material will cause the reinforcement layer to peel off, resulting in repeated reinforcement of the tunnel.

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