摘要
为保证矩形顶管盾构隧道下穿高铁近接施工的稳定性,以某火车站东侧地下通道工程为例,采用ABAQUS有限元分析软件建立了复合地层下穿高铁矩形顶管盾构隧道近接施工的精细化计算模型,分析了硬岩比、埋深因子和管节因子对复合地层顶管盾构隧道近接下穿施工时地表位移、轨道变形、管节收敛和安全系数的影响。结果表明:随着复合地层硬岩比的增加、埋深因子的减小和管节因子的增加,矩形顶管盾构隧道施工时的地层位移极值、地表沉降、上覆高铁轨道变形和管节收敛逐渐减小,管节安全系数逐渐增加,复合地层矩形顶管盾构隧道的施工稳定性提升。研究结果可为类似工程施工提供参考。
To ensure the construction stability of rectangular pipe jacking shield tunnel,taking the underground passage project on the east side of a railway station as the case study,the refined model of rectangular pipe jacking shield tunnel under high-speed railway in composite stratum was established using the finite element software ABAQUS.The effects of hard rock ratio,buried depth and pipe joint factors on surface displacement,track deformation,pipe joint convergence and safety factor were analyzed.The results show that with the increase of hard rock ratio in composite stratum,the decrease of buried depth factor and the increase of pipe joint factor,the extreme value of stratum displacement,surface settlement,the overlying high-speed rail track deformation and pipe joint convergence gradually decrease,the safety factor of pipe joint gradually increases,and the construction stability of rectangular pipe jacking shield in composite stratum becomes better and better.The research conclusion can provide reference for similar projects.
作者
宁茂权
晋学辉
刘朝钦
麻建飞
崔光耀
NING Maoquan;JIN Xuehui;LIU Chaoqin;MA Jianfei;CUI Guangyao(China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430064,Hubei,China;Haixia Traffic Engineering Design Co.,Ltd.,Fuzhou 350004,Fujian,China;School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China;School of Civil Engineering,North China University of Technology,Beijing 100144,China)
出处
《高压物理学报》
CAS
CSCD
北大核心
2022年第6期188-196,共9页
Chinese Journal of High Pressure Physics
基金
国家自然科学基金(52178378)
中铁第四勘察设计院集团有限公司科技研究开发项目(2020K143)。
关键词
矩形顶管盾构隧道
复合地层
施工稳定性
近接施工
rectangular pipe jacking shield
composite stratum
construction stability
close-space construction
