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本文指出了现行方法的不合理所在,提出了新的建议方法。本文建议:岩石坝基允许承载力的给定,首先应通过现场大型三轴岩体试验,求出岩体抗压强度与侧压力的关系式;其次测出地应力的量值和方向;再将测得的岩体强度、地应力同建筑物的作用力进行统一考察,并考虑岩体条件在施工开挖和运行中的可能变化,综合分析后,确定岩体的允许承载力。本文认为:在将现场静力试验求得的岩体弹性(变形)模量,应用到坝基同种岩石时,应考虑坝基与试验点的岩体结构面的差异(其差异可用波速值的比值表示),根据其差异将试验值予以增减给定。岩石坝基的允许承载力和弹性(或变形)模量,现行的给定方法,有些不合理,需要改进。下面谈点个人看法。
This article points out the irrationality of the current method and proposes new suggestions. This paper suggests that for the given bearing capacity of a rock foundation, the relationship between the compressive strength of the rock mass and the lateral pressure should first be determined by a large-scale triaxial rock test on site; secondly, the magnitude and direction of the ground stress should be measured; The measured rock mass strength, ground stress and the force of the building are examined in a unified manner, and the possible changes in the rock conditions during construction excavation and operation are considered. After comprehensive analysis, the allowable bearing capacity of the rock mass is determined. This paper argues that when applying the elastic modulus (deformation) modulus of the rock mass obtained from the on-site static test to the same type of rock on the dam foundation, the differences in rock mass structure between the dam foundation and the test point should be taken into account (the ratio of the available wave speed values). Indicated), depending on the difference, the test value is increased or decreased. The allowable bearing capacity and elastic (or deformation) modulus of the rock foundation, the current given method, is somewhat unreasonable and needs improvement. Let’s talk about personal opinions below.