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在抗滑稳定计算中,如何结合地质条件,正确地选取坝基抗剪系数,直接关系到水工建筑物的稳定安全和工程造价。下面,我们结合实践中遇到的一些情况,对坝基抗剪强度,它的一般规律,指标的选择,不同的剪切形式以及如何结合工程地质特征进行选点和试验等问题,谈谈一些看法。一、抗剪强度特性分析1.一般概念岩石的剪力试验,可分为抗剪断试验与抗剪试验两种。当砼胶结在基岩上或基岩本身,在一定垂直压力(包括垂直压力等于零在内)作用下,受剪切方向的荷重而产生断裂时的强度称为抗剪断强度;当垂直压力等于零时的抗剪
In the calculation of anti-skid stability, how to correctly select the shear coefficient of dam foundation in combination with geological conditions is directly related to the stability and safety of the hydraulic structure and the project cost. In the following, we will combine some practical situations to talk about some questions such as the shear strength of dam foundation, its general rules, the selection of indexes, different forms of shear and how to select and test the engineering geological features . First, the shear strength characteristics of a general concept of rock shear test can be divided into shear resistance test and shear test two. When the concrete cemented on the bedrock or the bedrock itself, under a certain vertical pressure (including the vertical pressure equal to zero) under the action of the load in the shear direction to produce the rupture strength is called the shear strength; when the vertical pressure is equal to zero Shear