| 粘土表面干缩裂缝形成过程的数值模拟(英文) |
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| 引用本文： | 邓刚,沈珠江,杨代泉.粘土表面干缩裂缝形成过程的数值模拟(英文)[J].岩土工程学报,2006,28(2):241-248. |
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| 作者姓名： | 邓刚 沈珠江 杨代泉 |
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| 作者单位： | 清华大学水利水电工程系；南京水利科学研究院 北京100084；北京100084；南京水利科学研究院；江苏南京210024；Amberg &; TTI Engineering Pte Ltd；Singapore 449269； |
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| 摘 要： | 基于孔隙气压力等于大气压力的假定,建议了针对非饱和土的简化固结理论。相应的修改了饱和土的有限元程序,用于分析粘土表面干缩裂缝的形成过程。数值分析中将多边形网状分布的裂缝简化为轴对称问题,对土骨架采用弹塑性的双硬化模型进行描述,并分析了不同参数对裂缝宽度和深度影响的敏感性。
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| 关 键 词： | 数值模拟 干缩裂缝 粘土 非饱和土固结理论 |
| 文章编号： | 1000-4548（2006）02-0241-08 |
| 收稿时间： | 2005-05-19 |
| 修稿时间： | 2005-05-19 |
Numerical simulation of crack formation due to desiccation in clay surface |
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| DENG Gang,SHEN Zhu-jiang,YANG Dai-quan.Numerical simulation of crack formation due to desiccation in clay surface[J].Chinese Journal of Geotechnical Engineering,2006,28(2):241-248. |
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| Authors: | DENG Gang SHEN Zhu-jiang YANG Dai-quan |
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| Affiliation: | 1.Department of Hydraulic Engineering Tsinghua University Beijing 100084 China 2.Nanjing Hydraulic Research Institute Nanjing 210024 China 3.Amberg TTI Engineering Pte Ltd Singapore 449269 Singapore |
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| Abstract: | A simplified consolidation theory for unsaturated soils was proposed based on an assumption that pore air pressure equaled to the atmosphere pressure. A finite element computer program for saturated soils was revised accordingly in order to be used in the analysis of crack formation and propagation upon drying on the clay surface. In numerical simulation, the distribution of polygonal cracks was simplified as an axisymmetdcal problem with a double hardening elasto-plastic model adopted for soil skeleton. The sensitivities of various oarameters to the width and denth of cracks develoned were also studied |
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| Keywords: | numerical simulation shrinkage crack clay consolidation theory of unsaturated soils |
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