摘要
围岩松动圈厚度的确定是地下硐室支护的基础,而对于非圆形硐室没有现成的计算公式,且现场实测松动圈一般比较困难,因此,对于非圆形硐室建立围岩松动圈与其影响因素之间的函数关系势在必行。本文采用FLAC3D数值计算程序,通过模拟不同条件下矩形硐室的松动圈,用回归方法建立松动圈厚度(Lp)与围压(P)、粘聚力强度(C)、摩擦角(φ)及跨高比K之间的关系,并通过了假设检验。
The identification of the rock broken zone thickness is the foundation of liner of the underground cavity;there is no ready-made formula for non-circular cavity,and it is difficult to measure at the site.Therefore,it is imperative to establish a function that connects the thickness of broken zone with the affecting factors.The broken zones of rectangle cavity under different conditions were calculated by FLAC3D.The relationship between the broken zone（Lp） of surrounding rock,the surrounding pressure（P）,the cohesive（C）,the friction angle（） and the span height rate K were established with the regressive formula and were certified.
出处
《防灾科技学院学报》
2010年第4期66-69,共4页
Journal of Institute of Disaster Prevention
关键词
松动圈
矩形硐室
数值模拟
回归公式
broken zone
rectangular cavity
numerical simulation
regressive formula
