隧道浅埋段半圆拱形初砌结构荷载反分析研究
Study of Load Back Analysis for Arch-shaped Primary Lining Structure in Shallowly Buried Tunnel Sections
李佳莉 1周兴宇 1段鑫鹏 1刘英棨2
作者信息
- 1. 中国市政工程中南设计研究总院有限公司 武汉 430010
- 2. 武汉理工大学交通与物流工程学院 武汉 430063
- 折叠
摘要
结合浅埋段初砌-围岩层间压力、初砌钢拱架应力、上台阶初砌相对周边收敛等监测数据,建立半圆拱形初砌结构平面有限元模型,利用径向、切向未知荷载模拟复杂围岩响应,提出影响线方法,开展基于监测数据的结构荷载反分析研究.结果表明:所用荷载反分析方法可准确模拟复杂浅埋段围岩与未闭合支护结构的相互作用,反分析结果有效可靠,时效性强.
Abstract
Based on the monitoring data of initial masonry-surrounding rock interlayer pressure,initial masonry stress of steel arch frame and relative peripheral convergence of upper steps,a plane finite el-ement model of semi-circular arch initial masonry structure was established.The response of complex surrounding rock was simulated by unknown radial and tangential loads,and the influence line method was proposed to carry out the back analysis of structural loads based on monitoring data.The results show that the load back analysis method can accurately simulate the interaction between surrounding rock and unclosed supporting structure in complex shallow buried section,and the back analysis re-sults are effective,reliable and timely.
关键词
隧道工程/浅埋软岩段/监控量测/荷载反分析Key words
tunnel engineering/shallow-buried weak rock masses section/monitoring and measure-ment/unknown load back analysis引用本文复制引用
出版年
2024
NETL
NSTL
万方数据