厦门海底隧道陆域浅埋段动态施工过程分析  

Dynamic Construction Mechanics Analysis of Xiamen Sub-sea Tunnel in Terrestrial Shallow Section

作　　者：赵旭峰[1] 王春苗[2] 

机构地区：[1]中国国际工程咨询公司,北京100044 [2]北京城建设计研究总院,北京400045

出　　处：《地下空间与工程学报》2009年第4期769-775,共7页Chinese Journal of Underground Space and Engineering

基　　金：厦门市路桥建设投资总公司基金资助项目(2004056148)

摘　　要：基于地下工程施工力学理念,结合我国首条海底隧道———厦门翔安隧道工程陆域浅埋段施工过程,根据目前采取的CRD施工方法,建立数值模型,对其施工过程进行了模拟。分析了施工过程中随着各部的开挖,隧道变形动态发展历程;对浅埋隧道地表沉降采用经验预测和数值模拟进行了分析,数值计算结果反映了地表沉降随隧道各部开挖的动态变化过程;通过对初期支护时变受力体系分析,可以为施工过程中结构安全性评价提供依据;对开挖过程中隧道围岩应力状态和塑性区发展历程的分析,为洞室稳定性评价提供了理论依据。通过对大跨浅埋隧道在复杂地质条件下动态施工过程分析,可以进一步了解施工过程中围岩———支护系统相互作用的动态力学响应,为隧道动态设计与施工提供了科学的方法。Based on the construction mechanics theory of underground engineering, the numerical model was formulated for simulating the CRD dynamic construction process of Xiamen sub - sea tunnel in terrestrial shallow section. The developing process of displacement was analyzed with excavation of various parts of the tunnel. The ground surface settlement of large - span shallow tunnel was analyzed by the Peck prediction method and numerical simulation method, and the numerical simulation results gave the dynamic process of ground surface settlement with the construction. The evaluation of lining security could be made by the mechanics analysis of primary support. With excavation, the dynamic process of stressed state and plastic zone were analyzed, providing theoretical foundation for evaluation of surrounding rocks stability. Through the analysis on dynamic construction of sub - sea large - span shallow tunnel, the mechanical response of surrounding rocks and supporting system were understood during construction process, and the present theory provided an scientific method for the dynamic design and construction of tunnel.

关 键 词：海底隧道 大跨浅埋 动态施工力学 数值模拟 围岩稳定性 

分 类 号：U459.5[建筑科学—桥梁与隧道工程]