摘要
建立了偏压连拱隧道的3D有限元模型,对不同施工工况进行了数值模拟,并与现场监测资料进行比较,通过分析拱顶沉降、中隔墙的位移和应力、围岩的塑性区分布、初衬和二衬应力的变化规律,对偏压连拱隧道施工进行最优化设计,以此得出了最优施工步距、开挖顺序、断面开挖形式、左右两洞开挖面的最佳施工间距,对类似连拱偏压隧道的施工有重要的理论和实际指导意义。
In order to simulate and make optimum analysis of partial pressure joint arch tunnel, a 3D finite element model is established. The simulation results are compared with the measured data in site. Arch crown settlement, stress and displacement of middle wall, plastic area distribution of surrounding rock, and variation of initial and secondary linings are analyzed. Then, the joint arch tunnel＇s optimal construction sequence, the optimal construction space of two holes, the suitable construction method of cutting face and cycle length are determined by the simulation. The results provide a scientific basis and technical guidance for the construction optimization of partial pressure joint arch tunnel.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2009年第9期2875-2880,共6页
Rock and Soil Mechanics
关键词
偏压连拱隧道
3D有限元模型
动态模拟
施工优化
partial pressure joint arch tunnel
3D finite element model
dynamic simulation
construction optimization
