台阶高度对三台阶七步开挖法变形的影响  

The influence of step height to the three- bench and seven- step excavation method

作　　者：高悦琛 赵凯岩 王生光[1] 

机构地区：[1]兰州交通大学土木工程学院,甘肃兰州730070 [2]苏州高新有轨电车有限公司,江苏苏州215000

出　　处：《黑龙江交通科技》2016年第4期123-126,共4页Communications Science and Technology Heilongjiang

摘　　要：采用有限差分软件FLAC3D进行数值模拟分析,对比分析不同台阶高度对于变形控制的影响。通过对比三种工法,分析发现三台阶七步开挖法增加上台阶开挖高度虽然在一定程度上增大了上台阶的净空,这样有利于施工的操作,但是会增加围岩的变形和增大支护结构的受力。综合分析结果认为上台阶的开挖高度不宜太大。This article has numerical simulation analysis by using finite difference software： the FLAC3D, compares and an- alyzes the influence of different steps height for deformation control. By comparing three kinds of method, the article found the three - bench and seven - step excavation method although increased to some extent on the steps of clearance, this is ad- vantageous to the construction of the operation, but would increase the deformation of surrounding rock and increase the stress of the supporting structure. As the results, the excavation height should not be too wide.

关 键 词：FLAC3D 软岩隧道 三台阶七步开挖 台阶高度 

分 类 号：U442[建筑科学—桥梁与隧道工程]