锚杆设计参数对拉锚式支护结构水平位移的影响  

The influence of designing parameters of bolt on the horizontal displacement of tension anchor supporting structure

作　　者：王光勇[1] 刘希亮[1] 倪红梅[1] 

机构地区：[1]焦作工学院土木建筑工程系,河南焦作454000

出　　处：《矿山压力与顶板管理》2003年第3期13-15,共3页Ground Pressure and Strata Control

摘　　要：利用FLAC3D商业软件对基坑工程拉锚式支护结构的锚杆设计参数(锚杆长度、锚杆倾角、锚杆刚度以及锚杆设置深度)对支护结构水平位移的影响进行了数值模拟。模拟结果揭示:随着锚杆长度增加,最大水平位移减小,锚杆长度控制在1.5～2.0倍开挖深度之间为宜;锚杆倾角在15～30°之间对最大水平位移的影响不大;锚杆刚度不宜过大,也不宜过小,刚度在18.75GPa左右比较合适;加单根锚杆时,锚杆设置深度越小越好,在距支护结构顶部1m左右比较适宜。In this paper, effect of the dip angle, stiffness and design depth of bolt on the horizontal displacement of tension anchor supporting structure was carried out by FLAC3D. Numerical simulation results show that the dip angle of bolt doesn't influence on the maximum horizontal displacement when it is between 0° and 35°, and it is fit for being controlled 15°. The study also shows that the stiffness of bolt cannot be too large and too small, and it is more fitful when the stiffness reaches 75GPa, the design depth of bolt is increasingly smaller, what is more, it will be more fitful for about three meters near to the top of the supporting structure when adopting the single bolt.

关 键 词：锚杆 设计参数 拉锚式支护结构 数值模拟 水平位移 深基坑开挖工程 

分 类 号：TD353.6[矿业工程—矿井建设]