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Expansion soil ecological modifying agent and construction method

A construction method and technology of expansive soil, applied in the field of geotechnical engineering, can solve the problems of poor construction performance, long period and high cost

Inactive Publication Date: 2005-10-19
陈永烽
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above two methods have certain effects, we have found through years of construction experience, surveys of roads that have been opened to traffic, and indoor and outdoor tests that the reaction speed of lime and cement with soil is relatively slow, and the hydrates produced have low strength. The durability is poor, and the lime content is more than 8%, and the cement content is more than 6% to achieve a certain effect
However, repeated mixing is required during construction, the cycle is long, time-consuming, construction performance is poor, and the cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] Specific implementation examples

[0041] In order to test the effect of the expansive soil ecological modifier, I entrusted relevant units to do a lot of indoor tests and outdoor engineering entity tests, and found that the modified expansive soil has free expansion rate, expansion amount, expansion force, linear shrinkage rate, and shrinkage coefficient. Each has a significant decline, the shrinkage shows an obvious upward trend, and the CBR and unconfined compressive strength have increased significantly. At the same time, a long-term water soaking test compared with lime soil was done, and the indicators were obviously more stable than lime soil.

[0042] One of the specific implementation examples is introduced below:

[0043] The entire Hefei-Nanjing section of the Xi’an-Nanjing high-speed railway is in the expansive soil area. In order to ensure the safety and quality of the project, the Ministry of Railways conducted an expansi...

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Abstract

The present invention relates to technology of utilizing chemical reagent in treating expansion soil. The ecological expansion soil modifying agent consists of CMA weak acid resin liquid, water and active lime through full stirring. The ecological expansion soil modifying agent is sprayed to the surface in 1-3 times and penetrated into soil. Through ion exchange, gluing and curing, the expansion soil is altered in the structural characteristic, has raised strength and raised water stability, and is changed into non-expansion soil permanently. The said technology is simple, and the modified soil may be greened. The technology of the present invention is suitable for highway, railway, water engineering and other engineering.

Description

technical field [0001] The invention relates to geotechnical engineering, which is a technique for treating expansive soil with chemical reagents. Background technique [0002] - properties of expansive soil [0003] Expansive soil is widely distributed in my country, and its mineral composition is mainly composed of illite and montmorillonite, with a small amount of kaolinite. These hydrophilic clay minerals swell when exposed to water, shrink when dehydrated, and have obvious expansion and contraction, multi-fissure, super-consolidation, and weakening of strength. It is easy to cause accidents such as subsidence, slipping, longitudinal cracking, and collapse. In the construction of highways, railways, water conservancy, industrial and civil construction, etc., it is inevitable to pass through expansive soil areas. Treating expansive soils to ensure project safety and quality has always been a major technical problem that plagues the engineer...

Claims

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Application Information

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IPC IPC(8): E01C3/04E02D3/12E02D17/18
Inventor 陈永烽
Owner 陈永烽
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