A permanent repair method for tunnel lining cracks using uhpc material

Abstract

The invention discloses a method for permanently repairing tunnel lining cracks by using UHPC materials. Step S1: cutting the left and right walls and bottom of the tunnel lining cracks to obtain a main repair groove with a rectangular cross section. Step S2, Embedding auxiliary parts: horizontally place a butterfly-shaped tie bar in each group of dovetail paired grooves and the repaired main groove connected to it; Step S22, at the end of the repaired main groove located at the upper end of the tunnel, perpendicular to the repaired main groove A grouting water supply pipe is buried at the bottom, so that the far end of the grouting water supply pipe is located in the drainage water supply tank and communicated with the drainage water supply tank; at the end of the repair main tank at the lower end of the tunnel, a drainage pipe is buried perpendicular to the bottom; Step S3, filling and repairing the main groove and dovetail pair groove; Step S4, curing the UHPC material filling body, and completing the repair of the cracks in the tunnel lining. Using this method, the in-situ treatment of cracks in the tunnel lining is carried out, and the condition of moist heat curing is achieved, permanent repair is realized, and the safety of the tunnel structure is ensured.

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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