摘要
为进一步提高复杂围岩条件下隧道开挖的安全稳定性,依托八苏木铁路隧道工程,通过数值模拟的方法研究了上软下硬复合地层下大断面铁路隧道施工方案优选,对比分析台阶法、三台阶临时仰拱法、CRD法和三台阶七步法的初支结构位移及内力.综合结构位移及内力考虑,使用三台阶七步法进行开挖为最优方案.
In order to improve the safety and stability of tunnel excavation under the condition of complicated surrounding rocks,this paper,base on the Basumu railway tunnel engineering and by using finite difference numerical calculation software,studied the optimization of tunnel construction scheme in up-soft/low-hard stratum. The tunnel primary lining structural displacements and internal forces of step method,three benches temporary invert method,CRD method and three-bench seven-step method are compared and analysed. The results show that considering the displacement and internal force of the composite structure,the three-bench seven-step method is recommended for excavation.
作者
孟令瀚
安栋
荆鸿飞
MENG Linghan;AN Dong;JING Hongfei(School of Civil Engineering,North China University of Technology,Beijing,100144,China;The Fifth China Railway Survey and Design Institute Group,Beijing,102600,China)
出处
《北方工业大学学报》
2020年第2期129-134,共6页
Journal of North China University of Technology
基金
国家自然科学基金项目“强震区跨热断层隧道破坏机理及控制技术”(51408008)
北京市青年拔尖人才培育计划项目“强震区跨传热断层隧道破坏机理及控制技术研究”(1816008)
北方工业大学毓优人才项目支持计划项目(18XN012-043、18XN012-073).
关键词
铁路隧道
上软下硬地层
大断面
台阶法
三台阶临时仰拱法
CRD法
三台阶七步法
railway tunnel
up-soft/low-hard stratum
large section
step method
three benches temporary invert method
CRD method
three-bench seven-step method
