A New Technology for Preventing Secondary Crack Repair in Leakage Treatment by Slotting Method

Abstract

A novel process for preventing secondary cracking repair in grooving-method leakage treatment integrates the two processes of making a set dovetail groove at the surface of a leak and filling the dovetail groove to prevent secondary cracking. Making the set dovetail groove at the surface of the leak includes making a dovetail groove with an opening width of 4 cm, a bottom width of 10 cm and a depth of 3 cm at the surface of a crack or an expansion joint; and filling the dovetail groove to prevent secondary cracking includes filling the dovetail groove with shrinkage-compensating high-performance mortar, and performing polishing treatment of the surface of the mortar after curing. A flow guiding pipe, a plastic packing and a rubber rod are arranged in the groove for flow guiding and filling, and the novel process is a groove filling process that prevents micro-cracks, reduces surface cracking, has a good bonding property, is easy in construction and is free of sagging, dropping and separation. The novel process provided by the invention can avoid mortar leakage and extruded joint mortar, improve the grouting quality and enhance the protection, repair, reinforcement and strengthening effects, and is an advanced process.

Description

technical field [0001] The invention relates to a leakage treatment technology in water conservancy projects, in particular to a new technology for preventing secondary cracking and repairing in the leakage treatment by slotting method. Background technique [0002] Usually chemical grouting adopts three methods for construction, one is the surface sealing grouting method, which mainly uses quick-setting inorganic sealing materials to seal the joint surface first. Usually, a layer of plugging spirit with a thickness of 2cm and a width of 10cm is applied to the polished concrete surface. After curing for 24 hours, chemical grouting is performed. After grouting, the surface sealing material is removed and the leaking slurry is cleaned. In this construction method, under the condition that the grout propulsion pressure inside the fracture increases, it is generally easy to [0003] It is easy to run slurry at the joint surface between the sealing material and the concrete. ...

AI Technical Summary

Problems solved by technology

The appearance of these cracks will lead to problems such as grout leakage and grout running during chemical grouting

In addition, ordinary mortar often has problems such as difficulty in bonding with the concrete base surface, poor bonding effect, sagging, and detachment due to low initial bonding performance when performing vertical and top surface construction operations.

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