超大直径盾构工作井端头加固合理范围研究

本文以济南黄河隧道工程为研究背景,采用理论解析、数值模拟方法,研究超大直径盾构工作井端头加固合理范围。从洞门土体强度、稳定性及塑性角度,理论推导出盾构端头井合理加固范围;采用三维仿真软件,研究纵向、横向加固范围影响因素,并分析盾构隧道始发危险工况下产生的位移及应力场,研究方法及成果可为工程设计及施工提供科学指导和理论依据。

Research on the Reasonable Range of End Reinforcement of Large Diameter Shield Working Shaft

Based on the Yellow River tunnel project in Jinan as the project background,this paper studies the reasonable range of end reinforcement of large shield working shaft by using the research methods of theoretical analysis and numerical simulation.From the perspective of the strength,stability and plasticity of the portal soil,the reasonable reinforcement range of the shield end shaft is theoretically deduced,and the three-dimensional simulation software is used to study the influencing factors of the shield tunnels with different longitudinal and lateral reinforcement ranges,and analyze the displacement and stress field generated under initial dangerous working conditions of the shield tunnel.The research methods and results will provide scientific guidance and theoretical basis for the design and construction of the project.