黄土隧道系统锚杆受力特性及长度优化分析  

Analysis of Mechanical Characteristic and Length Optimization of Systematic Bolt in Loess Tunnel

作　　者：宿钟鸣[1] 

机构地区：[1]山西省交通科学研究院黄土地区公路建设与养护技术交通行业重点实验室,山西太原030006

出　　处：《郑州大学学报（工学版）》2013年第4期32-35,共4页Journal of Zhengzhou University（Engineering Science）

基　　金：山西省交通建设科技项目(11-2-18)

摘　　要：简要推导了Mindlin位移的黄土隧道系统锚杆轴力分布的理论解和弹塑性均质土体条件下围岩塑性区半径的理论解.以现场试验结果为依据,从拉拔力作用下系统锚杆的受力特性和锚喷支护中系统锚杆中性点的轴力两个角度出发,分析了黄土隧道中系统锚杆的受力特性及长度优化问题.The theoretical solution to the distribution of axial force in Mindlin displacement problem and the plastic radius of surrounding rock in the condition of elastoplastic homogeneous soil are deduced. Based on the results of field test, the mechanical characteristic of systematic bolt and its length optimization are discussed in loess tunnel from the two perspectives of the drawing force and axial force at the location of neural point. The results obtained will offer the technical support for the length optimization of systematic bolt in loess tunnel.

关 键 词：黄土隧道 系统锚杆 塑性区 接触压力 长度优化 

分 类 号：U455[建筑科学—桥梁与隧道工程]