真空冷冻干燥和烘干对滑带土孔隙特征的影响试验

崔德山; 项伟; 陈琼; 刘清秉; 郎林智; 吴益平

doi:10.3799/dqkx.2014.135

Volume 39 Issue 10

Oct. 2014

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Cui Deshan, Xiang Wei, Chen Qiong, Liu Qingbing, Lang Linzhi, Wu Yiping, 2014. Pore Characteristics of Sliding Zone Soils of Huangtupo Landslide by Vacuum Freeze-Dried and Dried Methods. Earth Science, 39(10): 1431-1437. doi: 10.3799/dqkx.2014.135

Citation:

Cui Deshan, Xiang Wei, Chen Qiong, Liu Qingbing, Lang Linzhi, Wu Yiping, 2014. Pore Characteristics of Sliding Zone Soils of Huangtupo Landslide by Vacuum Freeze-Dried and Dried Methods. Earth Science, 39(10): 1431-1437. doi: 10.3799/dqkx.2014.135

Citation:

Cui Deshan, Xiang Wei, Chen Qiong, Liu Qingbing, Lang Linzhi, Wu Yiping, 2014. Pore Characteristics of Sliding Zone Soils of Huangtupo Landslide by Vacuum Freeze-Dried and Dried Methods. Earth Science, 39(10): 1431-1437. doi: 10.3799/dqkx.2014.135

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Pore Characteristics of Sliding Zone Soils of Huangtupo Landslide by Vacuum Freeze-Dried and Dried Methods

doi: 10.3799/dqkx.2014.135

1.
Faculty of Engineering, China University of Geosciences, Wuhan 430074, China
2.
Three Gorges Research Center for Geo-hazard, Ministry of Education, China University of Geosciences, Wuhan 430074, China

Received Date: 2014-01-04
Publish Date: 2014-10-01

Abstract

Abstract

The pore characteristics of sliding zone soils, treated with vacuum freeze-drying and drying methods, respectively, are studied using water adsorption and constant-rate mercury injection porosimetry in branch tunnel Ⅰ of Huangtupo landslide located in Three Gorges Reservoir. It is found that the condensation and congestion function of water vapor in the ink bottle pore of dried sample lead to smaller specific surface area and weaker water vapor adsorption ability than those of the freeze-dried sample. The shrinkage functions and weaker adsorption potential in the dried sample make the granular structure closer, which in turn leads to smaller cumulative pore volume and maximum pore volume than those of freeze-dried sample. Considering the water vapor surface tension, the pore surface fractal dimension of freeze-dried sample is greater than that of the dried samples, which indicates that the pore surface of dried samples becomes smoother with a variety of chemical bonds. The mercury intrusion porosimetry results show that the pore diameter and pore volume of freeze-dried sample are greater than those of the dried samples in the range of micropore and mesopore. But in the pore diameter range of 0.133-129.051 μm, the pore volume of freeze-dried sample is greater than that of the dried samples. The particle volume of dried sample with diameter greater than 41.421 μm is bigger than that of the freeze-dried samples.
- sliding zone soil,
- water vapor adsorption,
- constant-rate mercury injection,
- pore size distribution,
- specific surface area,
- fractal dimension

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References

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Pore Characteristics of Sliding Zone Soils of Huangtupo Landslide by Vacuum Freeze-Dried and Dried Methods

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