一种确定预应力锚索在地下工程支护设计中自由段长度的方法  

A Method of Determining Length of Free Section of Prestressed Anchored Cable in Design of Support for Underground Works

作　　者：刘桂宏[1] 罗斌[2] 

机构地区：[1]重庆交通大学土木建筑学院,重庆400074 [2]招商局重庆交通科研设计院有限公司,重庆400067

出　　处：《公路交通技术》2014年第2期97-98,102,共3页Technology of Highway and Transport

摘　　要：随着地铁地下车站大跨径洞室的修建,出现了很多围岩坍塌病害问题,预应力锚索通过施加预应力对洞室围岩有良好的支护效果。针对地下洞室顶部的围岩特性,介绍在其支护设计中,确定预应力锚索自由段长度的一种方法。With construction of large-span cavities at underground stations of metros, many disaster problems of wall-rock collapse occur, the prestressed anchored cables with application of prestress exhibits perfect supporting effect. In allusion to wall-rock characteristics on the top of underground cavities, this paper introduces a method of determining the length of free section of prestressed anchored cable in design of support.

关 键 词：预应力锚索 地下工程 自由段长度 

分 类 号：U459[建筑科学—桥梁与隧道工程]