CAJ | 학술논문

合理选择岩石强度准则对隧道应力及位移预测和支护设计都具有重要意义，基于Mogi‐Coulomb强度准则和理想弹塑性模型，通过中间主应力系数反映中间主应力的影响，推导了圆形隧道围岩应力和位移的解析解，并对所得结果进行比较与验证，得到了中间主应力和围岩抗剪强度参数的影响特性。研究表明：具有广泛的适用性和较好的可比性，Mohr‐Coulomb强度准则解答和Matsuoka‐Nakai准则解答均为其特例；结果关于中间主应力系数 b＝0.5对称，较好地反映了岩石强度的中间主应力效应及其区间性；粘聚力及内摩擦角对围岩塑性区半径和隧道洞壁位移的影响显著，应充分考虑中间主应力影响及围岩抗剪强度参数变化对隧道设计与施工的影响。
합리선택암석강도준칙대수도응력급위이예측화지호설계도구유중요의의，기우Mogi‐Coulomb강도준칙화이상탄소성모형，통과중간주응력계수반영중간주응력적영향，추도료원형수도위암응력화위이적해석해，병대소득결과진행비교여험증，득도료중간주응력화위암항전강도삼수적영향특성。연구표명：구유엄범적괄용성화교호적가비성，Mohr‐Coulomb강도준칙해답화Matsuoka‐Nakai준칙해답균위기특례；결과관우중간주응력계수 b＝0.5대칭，교호지반영료암석강도적중간주응력효응급기구간성；점취력급내마찰각대위암소성구반경화수도동벽위이적영향현저，응충분고필중간주응력영향급위암항전강도삼수변화대수도설계여시공적영향。
Reasonable choice of rock strength criteria is crucial for stress and displacement prediction and support design in tunnel engineering . Based on Mogi‐Coulomb strength criterion and elastic‐perfectly plastic model ,analytical solutions of stress and displacement for surrounding rocks around a circular tunnel were derived The intermediate principal stress coefficient was used to present the intermediate principal stress effect .The results in this study were compared with the current solutions in the literatures and the influence of intermediate principal stress and shear strength parameters of surrounding rocks was discussed . The results showed extensive applicability and the Mohr‐Coulomb strength criterion and Matsuoka‐Nakai criterion are two special cases ;when the intermediate principal stress coefficient b was equals to 0.5 ,the results indicated that the intermediate principal stress effect and its range for rock strength ;the influence of cohesion and internal friction angle on the plastic radius and tunnel wall displacement was significant ;Care should be taken to the effects of intermediate principal stress and shear strength parameter variations of surrounding rocks on tunnel design and construction .