岩体节理面的力学效应研究

简易纵剖面仪和Ｒｙ—ＪＲＣ尺为定量统计研究岩体节理的表面形态和粗糙度系数提供了有效的量测工具．本文根据简易纵剖面仪在某一节理面上野外现场绘制的１０２３条不同方向、不同取样长度的节理表面轮廓曲线的实测统计资料，系统、定量地分析了节理表面形态的各质异性、各向异性和非均一性；运用ＪＲＣ—ＪＣＳ模型讨论了岩体节理力学参数的各质异性效应、各向异性效应、非均一性效应、评定长度效应、几何形状效应和法向应力效应等问题．在此基础上，提出了按岩性定向统计研究节理表面形态、估测节理粗造度系数和估算岩体节理力学参数的科学思路．文末对正确运用ＪＲＣ—ＪＣＳ模型估算岩体节理力学参数的有关注意事项作了简要说明．

RESEARCH ON MECHANICAL EFFECT OF ROCK JOINT

A patent product,simple profile instrument(SPI),has settled the difficult problem of estimating joint roughness coefficient.SPI and Ry-JRC Ruler provided the powerful means to determine the surface shape and JRC quantitatively.The nonuniformity,anisotropy and unhomogenous of joint profile curves of various direction and sampling length measured by SPI.The nonuniformity effect,anisotropy effect, unhomogenous effect,sampling length effect,geometrical shape effect and normal stress effect of joint mechanical parameters were discussed with JRC-JCS models.A reasonable method was suggested that the estimating JRC and mechanical parameters of joint depends on the directional statistics of joint surface shape.Some notes on estimating joint mechanical parameters using JRC-JCS models was also briefly illustrated.