地铁隧道暗挖施工引起刚性接口管线变形的理论分析  

Theoretical Analysis of Rigid Connection Pipeline Deformation Affected by Tunneling Construction of Metro Tunnel

作　　者：高丙丽[1] 陈立成[1] 

机构地区：[1]西安科技大学建筑与土木工程学院,陕西西安710054

出　　处：《防灾减灾工程学报》2017年第2期288-293,共6页Journal of Disaster Prevention and Mitigation Engineering

基　　金：国家自然科学基金项目(41572287)资助

摘　　要：地铁施工造成邻近管线危害及其保护是一个重要问题。研究地铁隧道暗挖施工引起管线变形有助于在保证地铁暗挖施工的同时,确保管线的变形满足管线的正常使用,为地铁隧道的安全高效施工提供技术支撑。基于Winkler弹性地基梁理论模型,分别推导出与隧道轴线平行和垂直情况下的刚性接口地下管线由于隧道暗挖施工引起的变形计算公式,结果表明:隧道直径、管隧距离、沉降槽宽度系数、管径、管壁厚、管材弹性模量、下卧岩土体弹性模量、特征系数、泊松比、地层损失率等参数是管线变形的主要影响因素。以西安地铁三号线通—胡区间施工工程为例,制定了管线变形监测方案,工程实践表明理论预测公式计算结果与实际相符。Tunnel induced pipeline damage has become a big issue, The research objective is to guarantee the normal use of pipeline in safe construction of metro tunnel, and provides technical support for safety and high efficiency construction of metro tunnel. Based on Winkler elastic foundation beam theory model, when the pipelines are parallel and perpendicular to the tunnel, the deformation calculation formula of the rigid connection pipelines affected by tunnel construc- tion is derived in this paper. The theoretical analysis shows that there are main influencing fac- tors such as tunnel diameter, distance from pipeline to tunnel, settling tank width coefficient, pipe diameter, pipe wall thickness, pipe material elasticity modulus, underlying rock soil elastic ity modulus, characteristic coefficient, Poisson^s ratio and stratum loss. Taking the Tong-Hu in- terval tunnel of Xi＇an metro Line 3 as the background, pipeline deformation monitoring scheme was drawn up. The engineering practice shows that the calculation results from theoretical pre- diction formula are consistent with the actual ones.

关 键 词：暗挖施工 管线变形 监测 刚性接口 

分 类 号：TU456.3[建筑科学—岩土工程]