|Table of Contents|

Evolution Law of Fissures of Red Clay Slope Under Wet-dry Cycles(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2019年05期
Page:
52-61
Research Field:
Publishing date:

Info

Title:
Evolution Law of Fissures of Red Clay Slope Under Wet-dry Cycles
Author(s):
CHEN Kai-sheng
(College of Civil Engineering, Guizhou University, Guiyang 550025, Guizhou, China)
Keywords:
red clay model test wet-dry cycle fissure image processing
PACS:
TU446
DOI:
-
Abstract:
In order to study the evolution law of fissures of red clay slope under wetting and drying cycles, the indoor slope model was used to simulate the sunshine-rainfall dry-wet cycle, and the grating images were binarized by image processing technology. The quantitative indexes such as the fissure rate, the number of fissures, the total length of fissures and the number of soil blocks were extracted. The relationship between the evolution of fracture indexes and the number of cycles was analyzed under the rainfall evaporation cycle. The results show that the main cause of red clay cracking is the difference of matric suction between upper and lower parts of soil caused by water content gradient, resulting in uneven soil shrinkage, and the spatial distribution of soil swelling and shrinkage. Permeability and dehumidification rate are the key factors to determine the water content gradient. The width, depth and fracture rate of the fissure increase firstly and then tend to be stable with the increase of the number of cycles. The total number of fissures, the number of soil blocks and the total length of the fissure reach the maximum after the first dry-wet cycle, and decrease to varying degrees after the second cycle, and then the total number of fissures tends to be stable, whereas the total length of the fissure and the number of blocks still increase slightly in the later cycle.

References:

[1] 王培清,付 强.降雨入渗对裂隙性红粘土边坡的稳定性影响分析[J].公路工程,2013,38(5):165-170,192.
WANG Pei-qing,FU Qiang.Analysis on Stability of Red Clay with Cracks Based on Rainfall Infiltration[J].Highway Engineering,2013,38(5):165-170,192.
[2]王利明.非饱和土干裂缝及其对边坡稳定性影响研究[D].南宁:广西大学,2011.
WANG Li-ming.Test Study on Shrinkage Cracks of Unsaturated Soils and the Influence of Slope Stability[D].Nanning:Guangxi University,2011.
[3]赵 亮.膨胀土的裂隙特性及其对边坡稳定的影响研究[D].武汉:长江科学院,2012.
ZHAO Liang.Study on Fissure Characteristics and Its Impact on Slope Stability of Expansive Soil[D].Wuhan:Changjiang River Scientific Research Institute,2012.
[4]吕晓光.膨胀土裂隙发育与演化对边坡稳定性的影响研究[D].合肥:合肥工业大学,2012.
LU Xiao-guang.Research on Influence of Development and Evolution of Expansive Soil Fissures on Slope Stability[D].Hefei:Hefei University of Technology,2012.
[5]高志朋.膨胀土干湿循环开裂特性及路堑边坡开裂演化过程研究[D].长沙:长沙理工大学,2007.
GAO Zhi-peng.The Research on the Cracking Property of Expansive Soils in Wet-dry Cycling of Natural Weather and Cracking Evolution of Cutting Slope[D].Changsha:Changsha University of Science & Technology,2007.
[6]卢再华,陈正汉,蒲毅彬.膨胀土干湿循环胀缩裂隙演化的CT试验研究[J].岩土力学,2002,23(4):417-422.
LU Zai-hua,CHEN Zheng-han,PU Yi-bin.A CT Study on the Crack Evolution of Expansive Soil During Drying and Wetting Cycles[J].Rock and Soil Mechanics,2002,23(4):417-422.
[7]袁俊平,殷宗泽,包承纲.膨胀土裂隙的量化手段与度量指标研究[J].长江科学院院报,2003,20(6):27-30.
YUAN Jun-ping,YIN Zong-ze,BAO Cheng-gang.Quantitative Description Method & Index for Fissures in Expansive Soils[J].Journal of Yangtze River Scientific Research Institute,2003,20(6):27-30.
[8]唐朝生,王德银,施 斌,等.土体干缩裂隙网络定量分析[J].岩土工程学报,2013,35(12):2298-2305.
TANG Chao-sheng,WANG De-yin,SHI Bin,et al.Quantitative Analysis of Soil Desiccation Crack Network[J].Chinese Journal of Geotechnical Engineering,2013,35(12):2298-2305.
[9]汪为巍,黎 伟,易 远.南阳膨胀土裂隙发育规律研究[J].地下空间与工程学报,2015,11(6):1437-1443.
WANG Wei-wei,LI Wei,YI Yuan.Study on the Cracking Law of Nanyang Expansive Soil[J].Chinese Journal of Underground Space and Engineering,2015,11(6):1437-1443.
[10]张家俊,龚壁卫,胡 波,等.干湿循环作用下膨胀土裂隙演化规律试验研究[J].岩土力学,2011,32(9):2729-2734.
ZHANG Jia-jun,GONG Bi-wei,HU Bo,et al.Study of Evolution Law of Fissures of Expansive Clay Under Wetting and Drying Cycles[J].Rock and Soil Mechanics,2011,32(9):2729-2734.
[11]王文良,王晓谋,王家鼎.膨胀土填方边坡裂隙发育规律试验[J].长安大学学报:自然科学版,2016,36(2):17-25.
WANG Wen-liang,WANG Xiao-mou,WANG Jia-ding.Experiment of Expansive Soil Fissure Traits in Fill Slope[J].Journal of Chang'an University:Natural Science Edition,2016,36(2):17-25.
[12] 黎 伟,刘观仕,姚 婷.膨胀土裂隙图像处理及特征提取方法的改进[J].岩土力学,2014,35(12):3619-3626.
LI Wei,LIU Guan-shi,YAO Ting.Improvement of Methods for Crack Image Processing and Crack Feature Extraction of Expansive Soil[J].Rock and Soil Mechanics,2014,35(12):3619-3626.
[13] 唐朝生,施 斌,刘 春.膨胀土收缩开裂特性研究[J].工程地质学报,2012,20(5):663-673.
TANG Chao-sheng,SHI Bin,LIU Chun.Study on Desiccation Cracking Behaviour of Expansive Soil[J].Journal of Engineering Geology,2012,20(5):663-673.
[14] 周 健,徐洪钟,胡文杰.干湿循环效应对膨胀土边坡稳定性影响研究[J].岩土工程学报,2013,35(增2):152-156.
ZHOU Jian,XU Hong-zhong,HU Wen-jie.Impact of Wetting-drying Cycle Effects on Stability of Expansive Soil Slopes[J].Chinese Journal of Geotechnical Engineering,2013,35(S2):152-156.
[15]张雨灼,王柳江,刘斯宏,等.干湿循环下膨胀土边坡响应的模型试验[J].郑州大学学报:工学版,2015,36(6):114-118.
ZHANG Yu-zhuo,WANG Liu-jiang,LIU Si-hong,et al.Model Test on the Performance of the Expansive Soil Slope During Wetting-drying Cycles[J].Journal of Zhengzhou University:Engineering Science,2015,36(6):114-118.
[16]陈爱军,张家生.基于线弹性力学的非饱和红粘土裂缝开展分析[J].自然灾害学报,2013,22(3):198-204.
CHEN Ai-jun,ZHANG Jia-sheng.Analysis of Crack Development of Unsaturated Red Clay Based on Linear Elasticity Mechanics[J].Journal of Natural Disasters,2013,22(3):198-204.
[17]MORRIS P H,GRAHAM J,WILLIAMS D J.Cracking in Drying Soils[J].Canadian Geotechnical Journal,1992,29(2):263-277.
[18]TANG C S,SHI B,LIU C,et al.Influencing Factors of Geometrical Structure of Surface Shrinkage Cracks in Clayey Soils[J].Engineering Geology,2008,101(3/4):204-217.
[19]TANG C S,CUI Y J,TANG A M,et al.Experiment Evidence on the Temperature Dependence of Desiccation Cracking Behavior of Clayey Soils[J].Engineering Geology,2010,114(3/4):216-266.
[20]MILLER C J,MI H,YESILLER N.Experimental Analysis of Desiccation Crack Propagation in Clay Liners[J].Journal of the American Water Resources Association,1998,34(3):677-686.
[21]吕海波,曾召田,赵艳林,等.膨胀土强度干湿循环试验研究[J].岩土力学,2009,30(12):3797-3802.
LU Hai-bo,ZENG Zhao-tian,ZHAO Yan-lin,et al.Experimental Studies of Strength of Expansive Soil in Drying and Wetting Cycle[J].Rock and Soil Mechanics,2009,30(12):3797-3802.
[22]陈正汉,方祥位,朱元青,等.膨胀土和黄土的细观结构及其演化规律研究[J].岩土力学,2009,30(1):1-11.
CHEN Zheng-han,FANG Xiang-wei,ZHU Yuan-qing,et al.Research on Meso-structures and Their Evolution Laws of Expansive Soil and Loess[J].Rock and Soil Mechanics,2009,30(1):1-11.
[23]郑少河,金剑亮,姚海林,等.地表蒸发条件下的膨胀土初始开裂分析[J].岩土力学,2006,27(12):2229-2233.
ZHENG Shao-he,JIN Jian-liang,YAO Hai-lin,et al.Analysis of Initial Cracking Behavior of Expansive Soil Due to Evaporation[J].Rock and Soil Mechanics,2006,27(12):2229-2233.
[24]马 佳,陈善雄,余 飞,等.裂土裂隙演化过程试验研究[J].岩土力学,2007,28(10):2203-2208.
MA Jia,CHEN Shan-xiong,YU Fei,et al.Experimental Research on Crack Evolution Process in Fissured Clay[J].Rock and Soil Mechanics,2007,28(10):2203-2208.
[25]石北啸,王国利,韩华强.考虑失水率的膨胀土裂缝开展深度计算模型[J].水利水电技术,2014,45(11):57-60.
SHI Bei-xiao,WANG Guo-li,HAN Hua-qiang.Computation Model for Crack Developing Depth of Expansive Soil with Consideration of Water Loss Rate[J].Water Resources and Hydropower Engineering,2014,45(11):57-60.
[26]吴珺华,袁俊平,卢廷浩.基于变湿应力概念的膨胀土初始开裂分析[J].岩土力学,2011,32(6):1631-1636.
WU Jun-hua,YUAN Jun-ping,LU Ting-hao.Analysis of Initial Cracking Behavior of Expansive Soil Due to Moisture Change Stress[J].Rock and Soil Mechanics,2011,32(6):1631-1636.
[27]赵天宇,王锦芳.考虑密度与干湿循环影响的黄土土水特征曲线[J].中南大学学报:自然科学版,2012,43(6):2445-2453.
ZHAO Tian-yu,WANG Jin-fang.Soil-water Characteristic Curve for Unsaturated Loess Soil Considering Density and Wetting-drying Cycle Effects[J].Journal of Central South University:Science and Technology,2012,43(6):2445-2453.
[28]阎凤翔.太原东山黄土静力与动力性质研究[D].太原:太原理工大学,2004.
YAN Feng-xiang.Study on Static and Dynamic Properties of Taiyuan Dongshan Loess[D].Taiyuan:Taiyuan University of Technology,2004.

Memo

Memo:
-
Last Update: 2019-09-29