铁道标准设计2017，Vol.61Issue(4)：126-131,6.DOI:10.13238/j.issn.1004-2954.2017.04.027
土岩复合地层隧道群洞施工力学响应研究
Study on Mechanics Response to Tunnel Group Construction in Soil-rock Compound Stratum
摘要
Abstract
To explore the mechanical response caused the construction of small clear distance tunnel group passing through different stratums, numerical calculation and field test data, stress characteristics and surface settlement and vault deformation caused by construction of small clear distance tunnel group are analyzed based on soil-rock compound stratum of special geological conditions in Qingdao.In combination with the practical engineering, the construction of tunnel group is divided into four different phases.The results show that the surface subsidence is bigger in phase IV and no obvious changes in other phases;the construction of phase IV makes drastic changes in interlaid rock principal stress, the most unfavorable condition of interlaid rock occurs in phase IV without shear failure;the biggest incremental subsidence of tunnel vault appears after tunnel excavation;the upper line tunnel construction significantly affects the vault subsidence of other tunnels and may give rise to midline tunnel vault uplift.The research results provide guidance and technical support to the engineering stability analysis of similar projects.关键词
地铁/岩性/小净距隧道群/施工阶段/围岩稳定性/变形特征Key words
Metro/Rock mechanical property/Small clear distance tunnel group/Construction phase/Stability of surrounding rock/Deformation characteristic分类
交通工程引用本文复制引用
杜德持,王渭明,魏勋贺,吕显州..土岩复合地层隧道群洞施工力学响应研究[J].铁道标准设计,2017,61(4):126-131,6.基金项目
国家自然科学基金项目(41472280) （41472280）
