Modifying agent for treating swelling soil landslide

Abstract

The invention relates to modifying agent which is used to treat swelled ground landslide and a construction process. The modifying agent is prepared through dissolving polyvinyl alcohol and potassium chloride in water according to proportion, which is sprayed on the surface of swelled ground slope to form a modifying layer with certain thickness, thereby reducing the affect of water for the swelled deformation of swelled ground. The optimal weight proportion of the modifying agent is that polyvinyl alcohol: potassium chloride: dry ground is equal to 0.3:3:96.7. The advantages of the modifying agent are the two compounds are all easy to dissolve in water, calcarea lime does not need to be added, the pollution for environment can be avoided, and the construction is simple and convenient. The modifying agent can form adsorption by hydrogen bond with the surface of hydrophilic clay, can effectively inhibit swollen ground from generating crystal layer swelling, and has excellent fusion ability. And a protection layer with certain thickness can be formed on the modified slope surface, which effectively prevents water from penetrating into the inner portion of ground, thereby preventing ground swelling deformation and slope strength reduction which are caused by the water change in swelled ground, and avoiding the risk of generating swelled ground landslide.

Description

technical field [0001] The invention relates to a modifier for treating landslides in expansive soils. The modifier is a solution mixed with polyvinyl alcohol and potassium chloride in a certain proportion, which can effectively reduce the expansion and contraction characteristics of expansive soils and avoid the risk of landslides in expansive soils. . It belongs to the technical field of geotechnical engineering. Background technique [0002] Expansive soils are widely distributed in my country, and their clay components are mainly composed of strongly hydrophilic minerals montmorillonite and illite. The property of expansive soil to absorb water, expand, lose water, shrink and deform repeatedly, and its chaotically distributed cracks inside have serious damage to engineering buildings, especially light buildings, roadbeds, and cutting slopes. How to prevent the water content of expansive soil from drastic changes and how to prevent expansive soil from swelling when it e...

AI Technical Summary

Problems solved by technology

These physical protection methods cannot fundamentally solve the strong hydrophilic properties of expansive soil minerals, and cannot solve the damage caused by expansion and contraction deformation of expansive soil.

[0004] The filling slope is generally chemically modified by adding lime, but this method will pollute the groundwater to a certain extent, affect the ecological environment, and the solubility of lime is poor, and the modification effect is not good, and this method cannot For improving natural slopes