软岩中竖井开挖的支护分析  

Sub-support Analysis of Shaft Excavation in Soft Rock

作　　者：李辉[1] Li Hui(Geological Survey Lab,Xinjiang Institute of Water Resources and Hydropower Survey and Design Institute Urumqi 830000,Xinjian)

机构地区：[1]新疆水利水电勘测设计研究院地质勘察研究所,新疆乌鲁木齐830000

出　　处：《陕西水利》2018年第5期120-122,126,共4页Shaanxi Water Resources

摘　　要：以位于软岩地质的新疆某水电站闸门竖井开挖工程为例,依据弹塑性力学支护原则与结构力学支护原则,借助Mohr-Coulomb屈服准则选择各种可对比性支护方案。通过阐述计算比较分析等效塑性应变、塑性区、形变与结构应力,最后得出,混凝土衬砌可作为软岩中竖井开挖时的主要支护,锚杆支护仅可作为临时性辅助性支护,以供借鉴参考。Taking the silt shaft excavation project of a hydropower station in Xinjiang as an exainple, according to the elastic plastic mechanics and structural mechanics support principles, the article is with help of Mohr-coulomb yield criterion to select various comparable support schemes. By description, calculation, comparing and analyzing the comparative analysis of equivalent plastic strain, plastic zone, deformation and structural stress, it is concluded that concrete lining can be used as the main support, for shaft excavation in soft rock, and bolt support can only be used as temporary auxiliary branch, which can be referenced in the future.

关 键 词：软岩 中竖井 锚杆支护 混凝土衬砌 应力 

分 类 号：TV554[水利工程—水利水电工程]