Structure reserving grouting hole by inflating gas bag and grouting method of structure

Abstract

The invention discloses a structure reserving a grouting hole by inflating a gas bag. The gas bag of the structure is fixed to a groove of an enclosing structure at a construction seam of a main structure. An anti-cohesion agent is coated on the outer surface of the gas bag part on the side close to the main structure. A strong adhesion agent is coated on the outer surface of the gas bag part on the side away from the main structure. The gas bag part on the side away from the main structure is fixed to the enclosing structure or a waterproof material layer of the enclosing structure through the strong adhesion agent. Main structure concrete is poured around the gas bag. After the main structure concrete is solidified, when gas in the gas bag is pumped out and water is injected into a gap between the gas bag and the main structure concrete, the gas bag part coated with the anti-cohesion agent is separated from the main structure concrete and is contracted and folded on one side of the gas bag part coated with the strong adhesion agent. A cavity is located between the main structure concrete and the gas bag. The diameter of the gas bag is equal to that of a grouting pipe. The structure reserving the grouting hole by inflating the gas bag has the advantages of being good in grouting effect and low in cost. The invention further discloses a grouting method of the structure reserving the grouting hole by inflating the gas bag.

Description

Technical field [0001] The invention relates to the technical field of municipal underground engineering construction, and more specifically it is a structure that uses an air bag to reserve grouting holes. The invention also relates to a grouting method adopting a structure with an inflatable bag reserved for grouting holes. Background technique [0002] In order to solve the contradiction between the shortage of urban land and the increasing demand for land, urban construction has gradually shifted from the ground to the underground. In the construction of underground structures, there are inevitably a large number of construction joints and deformation joints. The existence of these structural joints often becomes the main channel for groundwater leakage. Groundwater leakage seriously affects the use and effectiveness of underground space; take underground subway stations For example, on the one hand, these leaking water cause wet stains on the station floor or hinder the use...

AI Technical Summary

Problems solved by technology

In the construction of underground structural engineering, there are inevitably a large number of construction joints and deformation joints. The existence of these structural joints often becomes the main channel for groundwater leakage. Groundwater leakage seriously affects the use efficiency and effect of underground space; For example, on the one hand, these leaks cause wet stains on the ground of the station or hinder the use of electrical equipment in the station, affecting the normal use of the subway station and bringing adverse social impact; on the other hand, the seepage can easily cause structural corrosion and affect the safety of the station structure.

[0003] The current conventional method is to reserve grouting pipes at the construction joints or deformation joints when pouring concrete, and use the grouting pipes to passively grout the leaks when leakage is found later; but this method currently has major defects , mainly because the grouting hole on the reserved grouting pipe is often blocked by concrete grout when the main structure concrete is poured, and the plugging grout injected through the grouting pipe in the later stage cannot break through the blockage at all, and the plugging grout cannot pass through the grouting The hole on the pipe enters the gap in the concrete wall, which often costs a lot of money but cannot achieve the expected plugging effect

[0004] The existing application number is 201210253475.2, and the patent name is "Deformation joint leakage repair method and special equipment for grouting", which discloses the method of opening grouting holes, inserting grouting pipes, and installing blocking guide strips , which is a passive repair method, the applicable conditions are more restricted;

[0005] The existing application number is 201210312967.4, and the patent name is "Repair and construction method for leakage of basement deformation joints", which discloses the method of adding water-swellable water-stop strips, externally-attached water-stop strips, and opening drainage trenches to divert water to puddles To deal with the leakage of deformation joints in the basement, and to achieve water stop by adding water stop measures, the cost is expensive, and it is not suitable for other leaky parts such as construction joints

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