| 土体稳定性计算中地下水作用力探讨 |
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| 引用本文： | 尹晓萌,晏鄂川,刘旭耀,李兴明.土体稳定性计算中地下水作用力探讨[J].岩土力学,2019,40(1):156-164. |
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| 作者姓名： | 尹晓萌 晏鄂川 刘旭耀 李兴明 |
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| 作者单位： | 1. 信阳师范学院 建筑与土木工程学院，河南 信阳 464000；2. 中国地质大学（武汉）工程学院，湖北 武汉 430074 |
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| 基金项目： | 国家重点基础研究发展计划(973)项目(No. 2011CB710605)；国家自然科学基金项目(No. 41807240）；信阳师范学院“南湖青年学者”奖励计划。 |
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| 摘 要： |
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| 关 键 词： | 土体稳定性 孔隙水压力 渗透力 浮力 设计规范 |
| 收稿时间： | 2017-10-14 |
Study on force of underground water in soil stability calculation |
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| YIN Xiao-meng,YAN E-chuan,LIU Xu-yao,LI Xing-ming.Study on force of underground water in soil stability calculation[J].Rock and Soil Mechanics,2019,40(1):156-164. |
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| Authors: | YIN Xiao-meng YAN E-chuan LIU Xu-yao LI Xing-ming |
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| Institution: | 1. Faculty of Architecture and Civil Engineering, Xinyang Normal University, Xinyang, Henan 464000, China
2. Faculty of Engineering, China University of Geosciences, Wuhan, Hubei 430074, China |
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| Abstract: | In order to clarify the concept confusion and to avoid repeated calculation of the force in the groundwater condition, the characteristics of three kinds of groundwater forces in soil, namely pore water pressure and buoyancy and seepage force, are discussed. It is emphasized that the pore water pressure in seepage environment is related to water depth and hydraulic slope according to the energy conservation theory. Then the equivalent relationships for two volume forces (buoyancy and penetration) to the boundary force (pore water pressure) are discussed. The calculation method of groundwater force acting on the separate soil skeleton and the unity of soil skeleton and pore water in a seepage environment is explored. The former should use seepage force and effective gravity of soil particle to calculate equilibrium. The latter should use pore water pressure and saturated gravity of soil to calculate equilibrium. Then the improper use of the groundwater force in present codes for landslide stability analysis related to landslide control engineering is discussed in this paper. In addition, the calculation deviation caused by the improper use of the groundwater force is illustrated in an engineering example. The results show that two problems exist in the relevant specification: pore water pressure is calculated without considering hydraulic slope angle and the concept of pore water pressure and buoyancy are confused. Both cases will cause partial conservative design and engineering management based on the latter case will arise large economic waste. |
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| Keywords: | soil stability pore water pressure seepage force buoyancy design code |
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