摘要
围岩松动圈是评价围岩稳定性的重要参数之一,文章结合大断面小净距鹤上隧道的工程实践,采用声波法和多点位移计法对隧道围岩松动圈进行了测试分析,获得了整个隧道断面松动圈的分布;基于测试结果,验证了该隧道锚杆设计支护参数的合理性,为围岩松动圈支护参数的确定提供了依据和指导。
The releasing zone is one of the most critical parameters to evaluate the stability of surrounding rock. According to the construction of Heshang large- section tunnels with small spacing, the ultrasonic wave method and multi-point extensometer are applied to the measurement of releasing zone, and the distribution of releasing zone is ascertained. Based on the measured data, the rationality of bolt support is proved, and some references and instruction are also provided for the design of support system for releasing zone of surrounding rock.
出处
《地下空间与工程学报》
CSCD
2007年第3期475-478,共4页
Chinese Journal of Underground Space and Engineering
基金
福建省交通厅交通科技发展项目
关键词
鹤上隧道
松动圈
测试
超声波
多点位移计
Heshang tunnels
releasing zone
measurement
ultrasonic wave
multi - point extensometer
