隧道浅埋段施工过程监测技术
摘要:隧道浅埋段施工过程中围岩变形复杂,选取隧道拱顶竖向位移为研究对象,分析隧道浅埋段围岩竖向位移的监测方法,在阿拉坦隧道进行了实地监测,并建立有限元数值计算模型,分析隧道浅埋段围岩变形规律。结果表明:在0.6倍洞径范围内开挖对拱顶围岩竖向位移影响较大,达到总位移的61%~67%;与75 m范围内竖向位移比较,距离隧道中心1.2倍洞径处竖向位移几乎为零,围岩松动圈已延伸至地表,离隧道中心线越远扰动强度越弱。数值计算得出岩层及地表变化规律与现场实测基本一致。
Abstract:The deformation of surrounding rock of shallow buried tunnel construction is complex,the vertical displacement of the tunnel vault is selected as the research object to analyze the monitoring method of vertical displacement of surrounding rock of shallow buried tunnel section,the field monitoring is conducted in Alatan tunnel,and the finite element numerical model is established,and the shallow buried tunnel surrounding rock deformation law is analyzed.The results show that within the scope of 0.6 times the hole diameter excavation had a greater influence on the vertical displacement of vault surrounding rock,it is up to 61%-67% of total displacement;Compared with 75 m within the scope of the vertical displacement,the vertical displacement is almost zero at the distances from 1.2 times the center of the tunnel hole diameter,the surrounding rock loose circle extends to the surface,the farther from the center line of the tunnel,the less disturbance intensity.The strata and surface variation law of numerical calculation are basicly consistent with the field measured.
中文标题：
隧道浅埋段施工过程监测技术
The Monitoring Technology of Shallow Buried Tunnel Construction
作者：
张福龙1,王丰仓1,张小强2
Zhang Fulong1,Wang Fengcang1,Zhang Xiaoqiang2
作者简介:张福龙,男,1988年生,汉族,辽宁锦州人,硕士,助教,主要从事岩土与隧道方面研究丁作。E-mail:469069340@qq.com
通讯地址：
1. 陕西铁路工程职业技术学院, 陕西渭南 714000; 2. 重庆大学土木工程学院, 重庆 400044
1.ShaanxiRailwayInstitute,Weinan714000,Shaanxi,China; 2.SchoolofCivilEngineering,ChongqingUniversity,Chongqing400044,China
中图分类号:U45
doi:10.3969/j.issn.1007-2993.2017.01.007
出版物：岩土工程技术
收稿日期:2016-08-30
网络出版日期:2021-07-06
关键词:监控量测,数值模拟,全位移,损失位移
Key words:monitoring and measurement,numerical simulation,full displacement,loss of displacement
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基金项目：
基金项目: 西省渭南市科研发展计划项目(2015KYJ-3-2)
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