Modifying agent for treating swelling soil landslide

A technology of improver and expansive soil, which is applied in the direction of soil conditioning materials, organic fertilizers, fertilizer mixtures, etc., can solve the problems of poor lime solubility, pollute groundwater, and cannot be used to improve natural slopes, and achieve good water stability and restraint Effects of expansion of crystal layer, prevention of soil expansion and contraction deformation and reduction of slope strength

Inactive Publication Date: 2008-08-06
泛华建设集团有限公司
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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 chemi

Method used

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Examples

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Embodiment Construction

[0010] Example, an expansive soil slope with a slope height of 5 meters, a slope ratio of 1:1.5, a water content of 18%, and a length of 10 meters, the thickness of the soil layer on the surface of the slope to be improved is 30 mm. The improvement agent preparation and construction steps are as follows: (1) Calculate the length of the slope surface to be 9 meters, and the soil mass to be improved is 47.8 tons, of which the dry soil mass is 40.5 tons; Need polyvinyl alcohol to be 125.6kg, potassium chloride to be 1256.5kg; (3) disperse polyvinyl alcohol in water, stir while spreading, the amount of water should reach to make polyvinyl alcohol completely dissolve, then disperse potassium chloride in polyvinyl alcohol (4) Spray the prepared modifier several times from top to bottom, left to right, from the top of the slope to the surface of the slope, after repeated spraying, until the required (5) The maximum water consumption of the modifier should be controlled so that the mo...

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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...

Claims

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Application Information

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IPC IPC(8): C09K17/40C09K103/00
Inventor 李志清胡瑞林
Owner 泛华建设集团有限公司
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