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Emergency treatment method for grout explosion in the bottom connecting cavity of precast concrete shear wall

A prefabricated concrete and emergency treatment technology, which is applied in the treatment of building materials, walls, buildings, etc., can solve the problems of troublesome treatment methods, expensive prices, and long time-consuming, so as to achieve controllable costs, improve work efficiency and emergency response. ability, consider the overall effect

Active Publication Date: 2021-12-31
SHANGHAI RES INST OF BUILDING SCI CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This processing method is cumbersome and time-consuming, and it takes at least 2-3 days, and there is still a risk of grout bursting during the second grouting
[0004] In the existing technology, for the cast-in-place construction site, there is a fast plugging material to plug the leakage of the pouring grout. Therefore, the fast plugging material is an existing material, but because of its high price, cost considerations, in the prior art It has not been used in the plugging of the connecting chamber explosion

Method used

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  • Emergency treatment method for grout explosion in the bottom connecting cavity of precast concrete shear wall
  • Emergency treatment method for grout explosion in the bottom connecting cavity of precast concrete shear wall
  • Emergency treatment method for grout explosion in the bottom connecting cavity of precast concrete shear wall

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] See attached figure 1 , combined with the attached Figure 2-4 , the sealing strip of the connecting cavity at the bottom of one side of the prefabricated inner wall is partially disengaged, that is, when it is in state A and state C at the same time.

[0032] see figure 2 and 4 , a precast concrete shear wall is the inner wall 7, and the length of the connecting cavity sealing strips 71 and 72 at the bottom is 1.1m. Three sleeves 3 are arranged in this length range, and the connecting cavity is grouted in the middle sleeve grouting hole 5 . During the grouting process, there is an overall disengagement and explosion of grouting in the middle range of about 0.3m in the middle range of the connecting cavity sealing strip 72 on the back side of the grouting hole. Emergency treatment is now carried out for it. The specific steps are as follows:

[0033] ① Reset the disconnected connecting chamber sealing strip to realize effective connection with the part that has not...

Embodiment 2

[0037] Simultaneously combined with Figure 2-4 , the sealing strip of the connecting cavity at the bottom of the outer side of the prefabricated exterior wall is partially broken and falls off, that is, when it is in state B and state D at the same time.

[0038] see figure 2 and 3 , a precast concrete shear wall is the outer wall 6, and the length of the connecting cavity sealing strips 61 and 62 at the bottom is 1.0m. Three sets of 3 are arranged in this length range, and the connecting cavity is grouted in the middle sleeve grouting hole 5. During the grouting process, the outer connecting cavity sealing strip 62 was broken and fell in the middle range of about 0.26m in length. Emergency treatment is now carried out. The specific steps are as follows:

[0039] ①Because the broken sealing strip of the connecting cavity has fallen off, directly use the rapid plugging material to smooth and seal the 0.26m long slurry explosion area.

[0040] ②Before the slurry bursts, all...

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Abstract

The invention relates to an emergency treatment method for grout bursting in a connected cavity at the bottom of a prefabricated concrete shear wall. The grout bursting situation is divided into two states according to the position and the degree of damage of the sealing strip, wherein: the inner side of the prefabricated outer wall or the prefabricated On any side of the inner wall, when the sealing strip is completely or partially disengaged, follow the steps below: S1. Reset the disengaged connecting cavity sealing strip to achieve effective connection with the part that has not been disengaged; S2. Select at least one point on the sealing strip, move back to set the distance and fix a point on the floor, nail a steel drill bit vertically to the floor at the fixed point, insert a wooden strip between the steel drill bit and the sealing strip, and the position of the wooden strip passes through the steel drill bit Provide counter force, tighten the sealing strip, and apply an appropriate amount of quick plugging material on both ends of the reset and tightened sealing strip; S3, implement secondary grouting. The invention can handle emergency and quickly restore grouting, and improve the work efficiency and emergency response ability of the construction site.

Description

technical field [0001] The invention relates to an emergency treatment method for grout explosion in a connected cavity at the bottom of a precast concrete shear wall, and belongs to the technical field of precast concrete shear wall installation. Background technique [0002] The vertical components of the prefabricated concrete structure are mainly connected by sleeve grouting. The grouting method generally adopts the grouting of the connecting cavity, that is, the grouting is grouted from a sleeve grouting hole. Sleeve until the grouting holes and grout holes of each sleeve are grouted and blocked. The so-called connecting cavity refers to the joint with a height of about 20 mm at the bottom of the prefabricated component, and the joint is sealed with special sealing material around the joint. The sealing quality of the connecting cavity is very important to ensure the smooth progress of grouting. If the sealing quality of the connecting cavity is unqualified or the pres...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04G21/02E04B2/00E04C5/16
CPCE04G21/02E04B2/00E04C5/165
Inventor 高润东李向民王卓琳肖顺张富文许清风
Owner SHANGHAI RES INST OF BUILDING SCI CO LTD
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