Experimental Research on Crack Extension and Indoor Rainfall
Infiltration of Nanyang Expansive Soil

doi:10.11885/j.issn.1674-5086.2015.03.04.11

Abstract

Abstract:

The crack of expansive soil occurs when the moisture content reduces，which brings great harm to the project.
Fissured expansive soil seepage under rainfall is a typical engineering problem. In this paper，6 identical remolded Nanyang
expansive soil samples were prepared，which were dried for 96，79，63，48，39 and 30 h in the same environment，respectively.
Surface crack images at different times were obtained with digital camera，and surface fracture rate was obtained through
images analysis. To measure crack development in the deep direction，the kerosene is used for infiltration experiments，and get
the curves of oil seepage coefficient and desorption time，average moisture content，surface crack rate were secured through
experiments；the law of fissured expansive soil permeability coefficient variation was got by the indoor simulated rainfall
experiments. Through analysis of the experimental data，we find out that there exist good relationship among sample desorption
time，surface cracks rate，average moisture content，oil seepage coefficient，the starting time of rainfall runoff and infiltration
rate. In the initial infiltration，infiltration rate decay with time soon，reduces two orders of magnitude within 15 min；the initial
infiltration rate of longer dewetting samples was higher and was with faster decay；infiltration rate stabilizes in a short time；
the stabilized infiltration rate increases linearly with the surface crack rate to a peak and then decreases rapidly.

Key words: expansive soil, crack, rainfall infiltration, runoff, infiltration rate

Wang Weiwei1*, Kong Lingwei2, Zang Meng2, Zhang Chuancheng1. Experimental Research on Crack Extension and Indoor Rainfall
Infiltration of Nanyang Expansive Soil[J]. 西南石油大学学报(自然科学版), DOI: 10.11885/j.issn.1674-5086.2015.03.04.11.

0
/ / Recommend

Add to citation manager EndNote|Ris|BibTeX

URL: http://journal15.magtechjournal.com/Jwk_xnzk/EN/10.11885/j.issn.1674-5086.2015.03.04.11

http://journal15.magtechjournal.com/Jwk_xnzk/EN/Y2015/V37/I3/174

References

[1] 廖世文. 膨胀土与铁道工程[M]. 北京：中国铁道出版

社，1984.

[2] 刘特洪. 工程建设中的膨胀土问题[M]. 北京：中国建

筑工业出版社，1997.

[3] 孙长龙，殷宗泽，王福升，等. 膨胀土性质研究综述[J].

水利水电科技进展，1995，15（6）：10 14.

Shun Changlong，Yin Zongze，Wang Fusheng，et al. Review

of expansive soils property[J]. Advances in Science

and Technology of Water Resources，1995，15（6）：

10 14.

[4] 姚海林，郑少河，葛修润，等. 裂隙膨胀土边坡稳

定性评价[J]. 岩石力学与工程学报，2002，21（S2）：

2331 2335.

Yao Hailin，Zheng Shaohe，Ge Xiurun，et al. Assessment

on slope stability in cracking expansive soils[J]. Chinese

Journal of Rock Mechanics and Engineering，2002，

21（S2）：2331 2335.

[5] 包承纲. 非饱和土的性状及膨胀土边坡稳定问题[J]. 岩

土工程学报，2004，26（1）：1 15.

Bao Chenggang. Behavior of unsaturated soil and stability

of expansive soil slope[J]. Chinese Journal of Geotechnical

Engineering，2004，26（1）：1 15.

[6] 包承纲，詹良通. 非饱和土性状及其与工程问题的联

系[J]. 岩土工程学报，2006，28（2）：129 136.

Bao Chenggang，Zhan Liangtong. Relationship between

unsaturated soil behavior and engineering problems[J].

Chinese Journal of Geotechnical Engineering，2006，

28（2）：129 136.

[7] 殷宗泽，徐彬. 反映裂隙影响的膨胀土边坡稳定性分

析[J]. 岩土工程学报，2011，33（3）：454 459.

Yin Zongze，Xu Bin. Slope stability of expansive soil under

fissure influence[J]. Chinese Journal of Geotechnical

Engineering，2011，33（3）：454 459.

[8] 陈亮，卢亮. 土体干湿循环过程中的体积变形特性研

究[J]. 地下空间与工程学报，2013，9（2）：229 235.

Chen Liang，Lu Liang. Investigation on the characteristics

of volumetric change during the wet-dry cycle of the

soil[J]. Chinese Journal of Underground Space and Engineering，

2013，9（2）：229 235.

[9] 姚海林，郑少河，陈守义. 考虑裂隙及雨水入渗影响

的膨胀土边坡稳定性分析[J]. 岩土工程学报，2001，

23（5）：606 609.

Yao Hailin，Zheng Shaohe，Chen Shouyi. Analysis on the

slope stability of expansive soils considering cracks and in

filtration of rain[J]. Chinese Jounal of Geotechnical Engi

neering，2001，23（5）：606 609.

[10] 姚海林，郑少河，李文斌，等. 降雨入渗对非饱和膨胀

土边坡稳定性影响的参数研究[J]. 岩石力学与工程学

报，2002，21（7）：1034 1039.

Yao Hailin，Zheng Shaohe，Li Wenbin，et al. Parametric

study on the effect of rain infiltaration on stability of unsaturated

expansive soil slope[J]. Chinese Journal of Rock

Mechanics and Engineering，2002，21（7）：1034 1039.

[11] 张华. 非饱和渗流研究及其在工程中的应用[D]. 武汉：

中国科学院武汉岩土力学研究所，2002.

[12] 袁俊平，殷宗泽. 考虑裂隙非饱和膨胀土边坡入渗模型

与数值模拟[J]. 岩土力学，2004，25（10）：1581 1586.

Yuan Junping，Yin Zongze. Numerical model and simulation

of expansive soils slope infiltration considered

fissures[J]. Rock and Soil Mechanics，2004，25（10）：

1581 1586.

[13] 陈铁林. 裂隙对非饱和土边坡稳定性的影响[J]. 岩土工

程学报，2006，28（2）：210 215.

Chen Tianlin. Effects of fissures on stability of unsaturated

soil slope[J]. Chinese Journal of Geotechnical Engineering，

2006，28（2）：210 215.

[14] 陈建斌. 大气作用下膨胀土边坡的响应试验与灾变机

理研究[D]. 武汉：中国科学院武汉岩土力学研究所，

2006.

[15] 李雄威. 膨胀土湿热耦合性状与路堑边坡防护机理研

究[D]. 武汉：中国科学院武汉岩土力学研究所，2008.

[16] 宋振电，侯蓝田，张辉. 彩色图像与灰度图像间转换的

程序设计[J]. 电子技术，2008（9）：33 36.

Song Zhendian，Hou Lantian，Zhang Hui. The conversion

progranm design of color images and gray image[J]. Electronic

Technology，2008（9）：33 36.