Grouting repair construction method for underground continuous wall defect

Abstract

The invention relates to a grouting repair construction method for an underground continuous wall defect, comprising the steps of: 1) constructing a water stop curtain on both sides of the defect position, and cleaning the waste slurry and waste soil above a groove section; 2) performing coring at the specified location and using a drill to drill the hole to the specified depth; 3) installing a suitable size of slurry pipes in the core hole, and embedding two slurry pipes in each core hole, one for a grouting pipe and the other for a discharging pipe; 4) using a grouting pump for washing withwater, and lifting up and down while washing until the water overflows from the core hole; 5) grouting into the slurry pipes with grouting material; and 6) performing grouting more than two times in each core hole, firstly performing grouting in one grouting pipe, and stopping the grouting after the slurry in the discharging pipe overflows and closing a ball valve; then performing grouting again until the pressure in the slurry pipes reach 1Mpa or more, stopping the grouting and closing the ball valve to end the grouting. According to the grouting repair construction method for underground continuous wall defect, a variety of underground continuous wall defects and leakage problems caused by special reasons can be effectively solved.

Description

technical field [0001] The invention relates to a grouting repair method at the defect position of an underground continuous wall. Background technique [0002] As the most commonly used form of enclosure for deep foundation pit engineering, underground diaphragm walls are currently widely used in China. However, due to the difficulty in construction of underground diaphragm walls, especially ultra-deep underground diaphragm walls, the quality may be affected by external factors during the construction process. Defects, such as untimely supply of concrete, interruption of construction due to natural weather or other reasons, complex geological conditions on site, etc. Since the quality of the ground wall is related to the safety of the foundation pit, its defects must be dealt with. The traditional measures such as wall patching and pile patching on the outside of the wall are extremely costly, and because it is necessary to wait for the strength of the concrete to rise, th...

AI Technical Summary

Problems solved by technology

The cost of traditional measures such as wall patching and pile patching on the outside of the wall is extremely high, and the progress of the entire project is also seriously hindered due to the need to wait for the strength of the concrete to increase

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