摘要
以镇海至安吉公路段杨湾小净距隧道工程为例,选取典型断面(埋深30 m和69 m),运用有限元数值软件MIDAS GTS/NX对三种常见开挖方法(上下台阶法、单侧壁导坑法、CD法)进行数值模拟研究.对比分析整体竖向位移、总位移、拱顶沉降值和应力变化等规律,指导项目进行施工方案优化,在保证安全前提下,选择更为高效的开挖方法.通过现场监控量测对数值模拟数据进行验证分析,可为类似工程提供借鉴.
Taking the Yangwan small spacing tunnel project from Zhenhai to Anji highway section as an example,the present paper selected the typical section(a buried depth of 30m and 69m).By means of the finite element software MIDAS GTS/NX,a numerical simulation study was conducted concerning the three excavation methods(the up and down steps method,single side wall guide pit method,and CD method).A contrast of the regularities of the vertical displacement of the whole,total displacement,vault subsidence and stress change was made to guide the project construction scheme optimization,and to choose more efficient excavation method under the premise that security was guaranteed.At the same time,the numerical simulation data were verified and analyzed through field monitoring and measurement,which can provide reference for similar projects.
作者
施露
周联英
SHI Lu;ZHOU Lianying(School of Civil Engineering,Shaoxing University,Shaoxing,Zhejiang 312000;Department of Civil Engineering,Zhejiang University City College,Hangzhou,Zhejiang 310000)
出处
《绍兴文理学院学报》
2020年第4期29-34,共6页
Journal of Shaoxing University
基金
国家自然科学基金项目“城市隧道开挖爆破地震波对邻近建筑物的动力响应及安全评价研究”(51408543)
浙江省自然科学基金项目“基于周期性排桩的饱和地基中地铁隧道近场屏障隔振机理研究”(LY18E080024)
杭州市科技计划项目“软土地区地铁隧道长期变形机理及控制技术研究”(20191203B40).
关键词
小净距隧道
数值模拟
开挖方法
优化
监控量测
small clearance tunnel
numerical simulation
excavation method
optimization
monitoring measurement
