Method for widening grouting reinforcement and seepage and blockage prevention range of rock and soil

Abstract

The invention discloses a method for widening the grouting reinforcement and seepage and blockage prevention range of rock and soil. Grouting holes and water drainage holes are distributed in the place where reinforcement and seepage prevention need to be conducted at intervals according to a certain form through combination of static pressure grouting and vacuum negative pressure water drainage. By means of vacuum negative pressure water drainage, the underground water level is lowered, underground water and air in holes of rock and soil are discharged, and dilution of underground water on grouting fluid is reduced. Negative pressure is formed at the water drainage positions, under the same grouting pressure condition, a forward pressure field is formed, the grouting speed is increased, and the grout expansion radius is increased. When a vacuum negative pressure pump works, underground water in holes of rock and soil surrounding the water drainage holes is collected towards the water drainage holes, dynamic water pressure is formed, and the grouting expansion radius is further increased. The grouting reinforcement and seepage and blockage prevention range of rock and soil is widened, the grouting effect is improved, the grouting quality is improved, and the grouting speed is increased. The method has the remarkable beneficial effects of being small in work amount, high in safety, good in grouting effect, wide in reinforcement and seepage prevention range, and the like.

Description

technical field [0001] The invention relates to a method for rock-soil grouting reinforcement and anti-seepage blockage, in particular to a method for enlarging the range of rock-soil grouting reinforcement and anti-seepage blockage. Background technique [0002] With the rapid development of China's economy, the scale of engineering construction is getting larger and larger, and the number of complex foundation treatment and geotechnical anti-seepage projects is increasing. In urban and rural roads, building foundations, track slopes, hydropower projects, mines, tunnels and other fields, some unfavorable rock and soil bodies are often encountered, causing major safety hazards to engineering construction and construction, or causing foundation instability, or causing Rock formations collapse, or cause water leakage, so it is necessary to reinforce or block the unfavorable rock and soil mass. At present, the main reinforcement and anti-seepage methods of rock and soil includ...

AI Technical Summary

Problems solved by technology

However, with this method, due to the existence of groundwater in the rock and soil, on the one hand, the groundwater fills the cracks in the rock and soil, hinders the entry of the grouting fluid, seriously affects the quality and effect of the grouting, and results in the grouting reinforcement and anti-seepage range. Small; on the other hand, the existence of water will dilute the grout, increase the amount of grout and construction time, increase the cost of grouting, and it is difficult to achieve the purpose of high efficiency, economy and high quality

[0003] CN103362117A relates to a grouting method for enlarging the grouting radius, but it is limited to the dilution of pore water pressure and groundwater on the grout, and the range of reinforcement and anti-seepage is limited

At home and abroad, there is no engineering method that combines static pressure grouting and negative pressure drainage to expand the scope of geotechnical grouting reinforcement and anti-seepage, which fills the gap in this area

Images