危岩主控结构面抗剪强度参数取值研究

摘要

危岩体后缘主控结构面的抗剪强度参数c、φ 值是对危岩体进行稳定性分析的关键.主控结构面的强度参数受多种因素的综合影响,所以探索一种快捷有效的抗剪强度参数计算方法是一种必然,也长期激励着广大岩土及地质工作者.通过对工程实践中常用的两种强度参数计算方式规范法和贯通率法对比分析,基于贯通率法试验结果和贯通率法计算公式建立起修正公式,修正公式采用分段函数形式,其可靠性在工程实践中得到证实.%It is one of the key problems to determine strength parameters c and φ of structural planes controlling stability of rock block in the rock slope stability analysis.There are many factors affecting the strength parameters,so choosing a simple,fast and reasonable calculation method of shear strength parameters is very important to the geotechnical and geo-logical workers.By analyzing and comparing normative method and the linking ratio method commonly used in the engi-neering practice,the correction formula is established based on the test result and the linking ratio method.The modified formula adopts the piecewise function form.The reliability is confirmed in engineering practice.