基于有效垂直应力水平的滑带土强度参数适用性研究

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摘要滑带土强度参数的正确选取是滑坡稳定性评价和抗滑工程设计中的关键问题。在已有研究成果的基础上，以四川薛城镇滑坡为例，对其滑带土样进行固结–大位移环剪–再固结–再环剪的剪切试验，再现复活型滑坡滑带土的强度特性，提出基于不同有效垂直应力(滑动体覆盖厚度)采用相应的残余强度和再生强度参数的取值方法，并论证其合理性，对复活型滑坡滑面强度参数的合理取值具有极为重要的参考价值。

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关键词 ：边坡工程, 复活型滑坡, 残余强度, 再生强度, 环剪试验, 稳定性分析

Abstract：The strength parameters of sliding zone soil are indispensable factors for stability evaluation and countermeasure design for landslides. Based on the previous study results，the shear tests on sliding zone soil derived from Xuecheng landslide，located along Zagunao river，Sichuan province，are conducted as follows：first the sliding zone soil is consolidated；then large displacement ring sheared，then consolidated again，and last ring sheared again；and the strength characteristics of sliding zone soil of the reactivated landslide are simulated and clarified. The method for determining and selecting the residual strength and recovered strength parameters depending on different effective vertical stresses is proposed and proved to be useful and rational for the reactivated landslide. The method may provide some important references for rationally choosing strength parameters of sliding zone soil of the reactivated landslide.

Key words： slope engineering reactivated landslide residual strength recovered strength ring shear test stability analysis

收稿日期: 2010-12-29

引用本文:

陈传胜，张建敏，文仕知. 基于有效垂直应力水平的滑带土强度参数适用性研究[J]. 岩石力学与工程学报, 2011, 30(8): 1705-1711.
CHEN Chuansheng，ZHANG Jianmin，WEN Shizhi. STUDY OF APPLICABILITY OF STRENGTH PARAMETERS OF SLIDING ZONE SOIL BASED ON EFFECTIVE VERTICAL STRESS LEVEL. , 2011, 30(8): 1705-1711.

链接本文:

http://www.rockmech.org/CN/Y2011/V30/I8/1705

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