Underground continuous wall joint close grouting and covering construction method and expansion rubber plug

Abstract

The invention relates to an underground continuous wall joint close grouting and covering construction method and an expansion rubber plug. According to the construction method, an obligated grouting duct is arranged at the joint of a middle amplitude and a first amplitude of a slot wall; the end of the duct is provided with an expansion rubber plug with a grouting interface tube; the obligated grouting duct is communicated with a leakage gap on any position of the joint of the middle amplitude and the first amplitude; and the effect of grouting plugging leakage is superior to an embedded grouting tube provided with a spraying hole. By adopting the obligated grouting duct in the construction method, a great amount of embedded grouting tubes and corresponding machining amount can be saved, and the expansion rubber plug can be recycled. The obligated grouting duct is also suitable for leakage detection method and plugging type subsection grouting and leakage detection method in the prior art. The construction method can be applied to slot-type continuous structures with any forms of leakage-proof joints. The construction method is simple, steel products can be saved, and the grouting and covering effect is reliable.

Description

technical field [0001] The invention belongs to anti-leakage technology, and in particular relates to a construction method for repairing leakage by grouting joints of ground and walls and an expansion rubber plug thereof. Background technique [0002] The underground diaphragm wall of the foundation pit (referred to as the ground connection wall) refers to the reinforced concrete underground structure of the groove-slab permanent retaining structure. After the construction of the section wall is completed, the middle groove section wall will be constructed. [0003] In order to ensure the integrity of the underground diaphragm wall and the impermeability of the joints between the trough section walls, anti-seepage joints are usually set between the trough section walls. There are many forms of anti-seepage joints, which can be roughly divided into two types: flexible joints and rigid joints. The common ones are rigid lock pipe joints. [0004] No matter what kind of joint...

AI Technical Summary

Problems solved by technology

[0006] The post-grouting reinforcement construction method of the above-mentioned flexible joint has a positive effect on overcoming the leakage gap between the groove section walls of the grooved plate type, but there are defects that the grouted steel pipe cannot be recycled and reused, and the consumption of the steel pipe is large

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