论文部分内容阅读
将广义的Hoek-Brown准则采用无量纲量形式进行表示,在此基础上,建立了均匀应力场圆形硐室的弹塑性解析方法。并针对不同性质岩体,分为不考虑岩体剪胀和塑性区内的弹性变形、考虑岩体剪胀且塑性区内的弹性变形为常量、考虑岩体剪胀且塑性区内的弹性变形为变量这3种情况,对深埋硐室围岩的塑性区位移进行了对比分析。分析结果表明:在考虑岩体剪胀且塑性区内的弹性变形为变量情况下,硐室围岩塑性区位移的计算结果最大。对于岩体质量差和一般的软岩硐室,应考虑岩体的剪胀特性和塑性区内的弹性变形,且塑性区内的弹性变形应为变量;而对于岩体质量好的硐室或者是硬岩硐室,则不必考虑岩体的剪胀特性和塑性区内的弹性变形。
The generalized Hoek-Brown criterion is expressed in the form of dimensionless quantities. On the basis of this, the elastoplastic analysis method of the circular chamber with uniform stress field is established. According to different types of rock mass, the rock mass is divided into elastic deformation without considering the dilatancy of rock mass and the plastic zone. Considering the dilatancy of the rock mass and the elastic deformation in the plastic zone as a constant, considering the dilatancy of the rock mass and the elastic deformation in the plastic zone For the three variables, the plastic zone displacements of surrounding rock of deep chamber are compared and analyzed. The analysis results show that the displacement of plastic zone in the surrounding rock of the chamber is the most calculated considering the dilatancy of the rock mass and the elastic deformation in the plastic zone as the variable. For rock mass with poor quality and general soft rock chamber, dilatancy characteristics of rock mass and elastic deformation in plastic zone should be considered, and elastic deformation in plastic zone should be variable. For chamber with fine rock mass or Is a hard rock chamber, you do not have to consider the dilatancy characteristics of rock and plastic deformation within the elastic zone.