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风化砂改良对膨胀土性能的影响(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2014年04期
Page:
145-148
Column:
研究论文
publishdate:
2014-07-01

Article Info:/Info

Title:
Influence of weathered sand improvement on performance of expansive soil
Article ID:
1000-2006(2014)04-0145-04
Author(s):
YANG Jun12YANG Zhi12ZHANG Guodong12TANG Yunwei3
1. Collaborative Innovation Center of Geological Hazards and Ecological Environment in Three Gorges Area in Hubei Province,China Three Gorges University, Yichang 443002, China;
2. Civil and Architectural Institute, China Three Gorges University, Yichang 443002, China;
3.Yichang Transport Bureau, Yichang 443002, China
Keywords:
improving expansive soil weathered sand initial dry density mixing sand ratio CBR
Classification number :
TU411.3
DOI:
10.3969/j.issn.1000-2006.2014.04.028
Document Code:
A
Abstract:
The expansive soil of highway reconstruction project was improved by using weathered sand which was widely distributed in Yichang. Through an indoor swell-shrink index test, a conclusion could be drawn that the improved expansive soil could significantly inhibit the swell-shrink characteristics. Through an indoor CBR test, another conclusion could be drawn that expansive soil mixed with weathered sand could obviously improve the CBR value and reach the standard of subgrade filler. The influence of different initial dry density and different sand proportion influence on CBR value of expansive soil were discussed. The results showed that: the initial dry density and the proportion of mixing sand had great influence on CBR value. At a certain initial dry density, the CBR value increased with the increase of sand ratio. At a certain sand proportion, the CBR value increased with the increase of initial dry density. CBR value and initial dry density expressed power relation. When initial dry density was small, CBR value and sand ratio expressed the linear relationship; when initial dry density was high, CBR value and sand ratio expressed the exponential function relationship.

References

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Last Update: 2014-07-31