CAJ | 학술논문

在岩土工程中,岩石抗力系数K反映了岩石抗力的大小,是设计环节中需要确定的一个极为重要的基础计算参数.基于统一强度理论,将巷道围岩视为多孔介质,考虑地下水渗流作用的影响,推导出了巷道围岩抗力系数计算统一公式,改变公式中的参数可以退化为其他围岩条件或者其他强度理论条件下的围岩抗力系数计算公式.研究结果表明,反映中间主应力对材料屈服影响的参数b、材料的黏聚力c、内摩擦角φ、孔隙水压力、地应力、衬砌压力均对围岩抗力系数K有一定影响.
재암토공정중,암석항력계수K반영료암석항력적대소,시설계배절중수요학정적일개겁위중요적기출계산삼수.기우통일강도이론,장항도위암시위다공개질,고필지하수삼류작용적영향,추도출료항도위암항력계수계산통일공식,개변공식중적삼수가이퇴화위기타위암조건혹자기타강도이론조건하적위암항력계수계산공식.연구결과표명,반영중간주응력대재료굴복영향적삼수b、재료적점취력c、내마찰각φ、공극수압력、지응력、츤체압력균대위암항력계수K유일정영향.
The rock resistant coefficient K is an important parameter and it reflects the resistance of the rock around the tunnel in the geotechnical engineering. A formula of rock resistant coefficient is derived based on unified strength theory, which can be adopted to obtain rock resistant coefficient in other situations or strength thoeries simplified by assuming the parameter value in the formula. The strength differential effect, intermediate principal stress effect and the ground water permeation effect are considered in the formula. The results indicate that the coefficient b, cohesion C ,friction angle φ, the pore water pressure ,the in-situ stress and the lining pressure all have significant influences on the rock resistant coefficient K.