A kind of anti-seepage reinforcement slurry against water flow erosion

Abstract

Anti-seepage and reinforcing paste slurry capable of resisting water flow erosion comprises a clay powder, cement and water, and also comprises a thickening agent, a weight-increasing agent and a tackifier, wherein the thickening agent is water-absorbing resin; the weight-increasing agent is a mixture of at least one of barite powder and iron ore powder and steel sand; the tackifier is vegetable gelatin. The paste slurry has low initial consistence and large specific gravity, avoids separation and layering, has high viscosity and high flowing water erosion resistance, is simple and convenientto slurry, low in cost and easy to operate, and has a wide market prospect.

Description

technical field [0001] The invention belongs to the field of geotechnical engineering foundation treatment grouting, and in particular relates to a paste-like plugging grouting material resistant to relatively large water flow erosion. Background technique [0002] In the anti-seepage and plugging of Quaternary strong permeable formations such as sandy pebbles, broken stones, karst cave accumulations, and fault fracture zones, when conventional grouting materials are used to treat such formations, due to high head pressure and groundwater velocity Fast, large seepage, and the grout is not resistant to water erosion, which often leads to continuous loss and waste of grouting materials, high construction costs, and even poor plugging effects. How to economically and effectively carry out anti-seepage and reinforcement treatment for highly permeable formations is a rock One of the technical problems of soil engineering foundation treatment. [0003] At present, methods such as...

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Problems solved by technology

But there are the following disadvantages: the cost is high, the pulping process is complicated, and the setting time of the slurry is sensitive to factors such as temperature, mixing amount, stirring degree, etc., which may easily cause the slurry to solidify prematurely or even flash in the pulping tank; at the same time, its The early strength of the formed gel is too high, it is easy to cause the pipe to be fixed and buried during continuous grouting, the construction is difficult, and it is not conducive to the grouting construction of large area and large leakage

[0004] In the patent CN96117823.X, the clay cement slurry with lower cost is used for grouting, and water glass is added to control the gel speed, but often because the slurry contains a large amount of water and clay, it is not conducive to the curing of the slurry material. During plugging and anti-seepage projects, it is easy to be eroded and destroyed by water due to the low early strength of the slurry stone body

In patent 201210113973.7, mineral additives, sulfate and bentonite are used as modifiers, which have certain effects, but in the actual construction process, it is found that the price of modifiers is relatively expensive, and the clay cement anti-seepage paste formed is relatively expensive. The erosion resistance in moving water with a large flow rate is not good, and the strength of the stone body decreases in the later stage. At the same time, in order to improve the erosion resistance of the material, reduce the fluidity of the material, and increase the consistency of the slurry, more modifiers are added, resulting in higher costs. High and the gel time of the slurry is short, easy to bury and fix the pipe, and its application is limited

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