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Science China Technological Sciences - Lake waters often act as important methane sources for global greenhouse gas emission, but it would be more complex as lakes are regulated by rivers. In this... 相似文献
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Research on stability of the accumulated rock-soil body of reservoir bank under rainfall condition 总被引:1,自引:0,他引:1
The shear strength parameters property of rock-soil aggregates in embankment slope of reservoir, that is, the relationship
between cohesion and gravel content, between friction angle and gravel content, and the relationship between cohesion and
water content, between friction angle and water content, is studied based on the direct shear test results, the shear strength
change law of the rock-soil aggregates is given, and the unsaturated shear strength formulation of rock-soil aggregates that
could consider suction and saturation degree influence is put forward in this paper, through which the sliding or failure
physical mechanism of this type of slope under the condition of rainfall infiltration is studied. Also the 3D unsteady saturated-unsaturated
seepage field and its FEM resolving mode are established based on the analysis of the slope rainfall infiltration process.
Case study with this method indicates that the minimum safety factor of the accumulated rock-soil aggregates dose not arrive
at the moment of rainfall cessation, but appears several hours after the rainfall cessation, this phenomenon is in accordance
with the practical slope engineering’s failure process and could explain appropriately the slope failure caused by rainfall
infiltration. Research results in this paper have an important reference value for the research on stability of the accumulated
rock-soil aggregates in embankment slope of reservoir, and can enrich the stability analysis method and relevant theory of
reservoir embankment slope.
Supported by the National Natural Science Foundation of China (Grant Nos. 50539010, 50539110, 50809025, 50539030-1-3), National
Science and Technology Support Plan of China (Grant Nos. 2006BAC14B03, 2008BAB29B06, 2008BAB29B03), Opening Fund of Geotechnical
Mechanic and Engineering Key Laboratory of the Ministry of Water Recourses of China (Grant No. G07-03), Science and Technology
Support Project of China Hydropower Engineering Consulting Group Co. (Grant No. CHC-KJ-2007-02), Special Scientific Research
Fund of Doctor Subjects of Colleges and Universities: Research on Diagnosis Method of Concrete Dam Crack Transferring 相似文献
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