首页|双侧壁导坑法工法优化与变形控制研究

双侧壁导坑法工法优化与变形控制研究

扫码查看
以广东省某公路隧道在超浅埋软土地层中施工下穿高速公路为背景,为解决传统双侧壁导坑法施工时隧道与地表超限沉降、交通管制困难、施工安全与营运安全风险高等难题,在传统双侧壁导坑法基础上提出改进工序、缩短步距、掌子面加固的工法优化方案,采用数值模拟、监控量测等手段,对工法优化方案进行变形控制研究.研究结果表明,对比传统工法,优化工法能够减少近一半临时支护安拆量,缩短工序时间,降低造价;能够大大缩短步距,加快施工进度,提高隧道开挖支护作业与地表交通的安全性.掌子面补强能够显著减小地表和隧道的沉降变形,提高掌子面的稳定性.优化工法能够使地表沉降和围岩支护的变形受控,保证隧道施工与上方高速公路的营运安全.
Study on Optimization of Double Sidewall Heading Method and Deformation Control
Based on the background of an ultra-shallow buried expressway tunnel in soft soil under-crossing expressway project in Guangdong Province,in order to address the challenges of excessive tunnel and surface settlement,traffic control difficulty,and high construction and operation safety risk that associated with traditional double sidewall heading construction method,on the basis of which this study proposed an optimized construction method to improve the working procedure,shorten the step distance and strengthen the tunnel face. The optimized construction method is studied by means of numerical simulation,monitoring and measurement to control the deformation. The results show that,compared to the traditional construction method,the optimized method can reduce the amount of temporary support installation and demolition by nearly half,shorten the working time and reduce the cost. It can greatly shorten the step distance,accelerate the construction progress,and improve the safety of tunnel excavation,support operations,and surface traffic. The reinforcement of the tunnel face can significantly reduce the surface and tunnel settlement deformation and improve the stability of the tunnel face. The optimized construction method can control the surface settlement and deformation of surrounding rock and support,ensuring the safety of tunnel construction and the operation of the highway above.

under-crossing expresswaydouble sidewall heading methodoptimization on the construction methoddeformation controlsafe construction

谭勇

展开 >

广东省南粤交通仁新高速公路管理处,广东 韶关512638

下穿高速公路 双侧壁导坑法 工法优化 变形控制 安全施工

2024

广东公路交通
广东省交通科技有限公司

广东公路交通

影响因子:0.311
ISSN:1671-7619
年,卷(期):2024.50(4)