浅谈牛路水库坝基岩体抗剪强度试验及参数选取

Discussion on Shear Strength Test and Parameter Selection of Rock Mass in Niulu Reservoir

基于从化牛路水库坝基岩体工程地质类别,在平硐内同一地质单元中选取合适的试验点进行现场岩体直剪试验,按库伦表达式绘制各试验点剪切应力与法向应力关系曲线,确定相应的抗剪强度参数。分析现场试验值与规范经验值的差别,选择合适的抗剪强度参数作为设计计算值,从而能避免安全隐患和节约工程成本,为类似的工程提供一定的参考。

Based on the geological classification of the dam foundation rock mass in Conghua-Niulu reservoir,a suitable test site is selected for the site rock mass direct shear test in the same geological unit in the adit,according to the coulomb expressions,the shear stress and normal stress curve of each test point are drawn,determining the corresponding shear strength parameters.Analyzing the difference between the field test value and the standard experience value,the appropriate shear strength parameter is selected as the design calculation value,thus it can avoid the safety hazards and save engineering costs,also provide the certain reference for the similar project.