| 土洞形成的机理及起始条件 |
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| 引用本文： | 万志清,秦四清,李志刚,钱海涛.土洞形成的机理及起始条件[J].岩石力学与工程学报,2003,22(8):1377-1382. |
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| 作者姓名： | 万志清 秦四清 李志刚 钱海涛 |
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| 作者单位： | 中国科学院地质与地球物理研究所工程地质力学重点实验室,北京,100029 |
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| 摘 要： | 分析了土洞的形成机理及影响土洞发育的因素，认为超静孔隙水压力或真空吸力使土的结构体(块体)产生剥落，而动水压力则使土的细颗粒产生迁移，两者共同作用，使土洞不断扩大。并推导出土洞形成的起始条件；临界水位降幅、临界地下水流速以及临界抽水涌水量的表达式。
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| 关 键 词： | 土力学 土洞 孔隙水压力 临界地下水 流速 涌水量 |
| 文章编号： | 1000-6915(2003)08-1377-06 |
| 收稿时间： | 2001-11-26 |
| 修稿时间： | 2001年11月26 |
FORMATION MECHANISM AND INITIAL CONDITION OF SOIL CAVITY |
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| Wan Zhiqing,Qin Siqing,Li Zhigang,Qian Haitao.FORMATION MECHANISM AND INITIAL CONDITION OF SOIL CAVITY[J].Chinese Journal of Rock Mechanics and Engineering,2003,22(8):1377-1382. |
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| Authors: | Wan Zhiqing Qin Siqing Li Zhigang Qian Haitao |
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| Abstract: | The formation mechanism and factors affecting of soil cavity are analyzed. It is realized that super- hydrostatic pressure makes the soil block spalled and fissured,and hydrodynamic pressure makes soil fine grain migrated. Both actions induce the enlargement of soil cavity. The initial conditions of soil cavity formation,i. e.,the critical declined magnitude of water level crHD,critical water flowrate vcr and critical discharge Qcr are formulated. |
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| Keywords: | soil mechanics soil cavity initial condition declined amplitude of critical water level critical water flowrate critical discharge |
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