Comparison of theory and test on excavation causing the variationof soilmass strength

机译：开挖引起土体强度变化的理论与试验比较

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In view of the excavation unloading characteristic, the variation of soilmass strength is studiedthrough the theoretical deduction and the test analysis. Baseed on the Hvorslev's real strength theory, the strengthratio of the unloading soil and the normal compressed soil considering the pore-water pressure is deduced andthe test simulating excavation is carried out. Through comparing data of the theory and test, the soilmass iscaused to be at the overconsolidated state, and the soil microstructure is damaged, then the soilmass strength isreduced in the unloading process. The analysis result of theory and test are helpful to the further understandingof the effect of unloading in excavation on the variation of the soilmass strength, which are very significant foravoiding project accidents.

机译：根据开挖卸荷特性，研究了土体强度的变化规律。通过理论推论和测试分析。基于Hvorslev的真实力量理论，力量推导了考虑孔隙水压力的卸荷土与正常压缩土的比值，进行模拟开挖试验。通过比较理论数据和试验数据，得出土壤质量为使土壤处于超固结状态，破坏了土壤的微观结构，则土壤的质量强度为减少了卸货过程。理论和测试的分析结果有助于进一步理解开挖卸荷对土体强度变化的影响避免项目事故。

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《Geotechnical aspects of underground construction in soft ground》|2009年|235-240|共6页
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J. Zhou; J.Q.Wang; L. Cong;
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Comparison of theory and test on excavation causing the variationof soilmass strength

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