Analysis on Improvement Effect of Expansive Soil by Soil-Water Characteristic Curve

2011 ◽  
Author(s):  
Heping Yang ◽  
Cunran He ◽  
Jie Xiao ◽  
Wentao Zhan
Keyword(s):  
Soil Water ◽  
Characteristic Curve ◽  
Expansive Soil ◽  
Soil Water Characteristic Curve ◽  
Improvement Effect

Soil water characteristic curve and improvement in lime treated expansive soil

2015 ◽  
Vol 8 (5) ◽  
pp. 687-706 ◽  
Author(s):  
Ahmed M. Al-Mahbashi ◽  
Tamer Y. Elkady ◽  
Talal O. Alrefeai
Keyword(s):  
Soil Water ◽  
Characteristic Curve ◽  
Expansive Soil ◽  
Soil Water Characteristic Curve

Experimental Study on Stress-Dependent Soil Water Characteristic Curve of a Recompacted Expansive Soil

2012 ◽  
Vol 256-259 ◽  
pp. 283-286 ◽  
Author(s):  
Rui Zhang ◽  
Jian Long Zheng ◽  
C W W Ng
Keyword(s):  
Soil Water ◽  
Mercury Intrusion Porosimetry ◽  
Characteristic Curve ◽  
Expansive Soil ◽  
Vertical Stress ◽  
Expansive Clay ◽  
Test Results ◽  
Soil Water Characteristic Curve ◽  
Soil Fabric ◽  
Stress Dependent

In order to investigate stress-dependent soil water characteristic curve of recompacted expansive soil and the changes of soil-water characteristic under vertical stress in terms of soil fabric and pore size distribution, pressure plate tests scanning electron microscopy (SEM) and mercury intrusion porosimetry (MIP) tests were conducted on a recompacted medium-expansive clay. The test results show that under an applied vertical stress, the air-entry value of a SDSWCC was greater than that of SWCC obtained under zero stress. No distinct hysteresis within a dry-wet cycle of SDSWCC could be found. The change of SWCC of the expansive soil under the applied stress could be mainly attributed to the rearrangement of aggregate and the compression of pores in the soil.

scholarly journals Experimental Study on Microstructure of Unsaturated Expansive Soil Improved by MICP Method

2021 ◽  
Vol 12 (1) ◽  
pp. 342
Author(s):  
Xinpei Yu ◽  
Hongbin Xiao ◽  
Zhenyu Li ◽  
Junfeng Qian ◽  
Shenping Luo ◽  
...  
Keyword(s):  
Water Content ◽  
Soil Water ◽  
Cement Content ◽  
Characteristic Curve ◽  
Expansive Soil ◽  
Spherical Particles ◽  
Water Stability ◽  
Soil Water Characteristic Curve ◽  
Engineering Characteristics ◽  
Unsaturated Expansive Soil

The soil water characteristic curve and microstructure evolution of unsaturated expansive soil improved by microorganisms in Nanning, Guangxi were studied by means of filter paper method and scanning electron microscope imaging (SEM). Based on Fredlung & Xing model, the influence law of different cement content on the soil water characteristic curve of improved expansive soil is proved. According to the analysis of SEM test results, the influence mechanism of MICP method on the engineering characteristics of improved expansive soil is revealed. The results show that with the increase of cement content, the saturated water content and residual water content of the improved expansive soil gradually increased. At the same time, the water stability gradually increased while the air inlet value gradually decreased. The improved expansive soil changes from the superposition of flat particles and flake particles to the contact between spherical particles and flake particles, which indicates that the aggregate increases significantly. With the increase of the content of cement solution, the contact between particles tends to be smooth and the soil pores gradually tend to be evenly distributed. The particle size and microstructure of soil particles was changed and the connection between particles was enhanced in the improved expansive soil. Eventually the strength and water stability of expansive soil were improved. The conclusions above not only provide a theoretical basis for the in-depth study of engineering characteristics of unsaturated expansive soil improved by MICP method, but also offer theoretical evidence for perfecting engineering technology of expansive soil improved by MICP method.

Determination and Compare Analysis for Soil Water Characteristic Curve Model in Planting Soil in Saline Region of Tianjin

2010 ◽  
Vol 12 (3) ◽  
pp. 336-341
Author(s):  
Fei CAI ◽  
Xiaohou SHAO ◽  
Zhenyu WANG ◽  
Mingyong HUANG ◽  
Yaming ZHAI ◽  
...  
Keyword(s):  
Soil Water ◽  
Characteristic Curve ◽  
Soil Water Characteristic Curve ◽  
Curve Model ◽  
Compare Analysis
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