摘要
厦门东通道海底隧道是一项规模宏大的跨海工程,是连接厦门市本岛和翔安区陆地的重要通道,也是中国大陆第一座采用钻爆法修建的大断面水底隧道,工程于2007年下半年由陆域进入施工难度最大、最危险的海域部分,其中的海底风化槽地段采用CRD工法进行施工,隧道开挖、支护过程中围岩和支护结构的受力和变形特征广为人们所关注,因此对于该段隧道稳定性的研究具有重要意义。应用大型有限元软件ABAQUS,依据流固耦合理论,对翔安隧道风化槽段隧道CRD工法的施工过程进行了三维动态仿真数值模拟,研究隧道施工过程中围岩的应力场、位移场、外水压力分布规律以及支护结构受力情况和衬砌外水压力的分布规律,研究成果为该隧道施工和同类工程建设提供了理论依据和实践经验。
East passageway of Xiamen subsea tunnel is a huge sea-crossing project. It is a significant route connecting Xiamen island with Xiang＇an city. Furthermore, it is the first large cross-section subsea tunnel in China, which is constructed with drill and blasting method. The construction will go through the most unfavorable strata and the most difficult construction was found in the latter half year of 2007. The CRD method is used to excavate the weathered slot. The mechanical behaviors and deformational characteristics of the supporting structures and host rock during the tunnel excavation are highly focused on recently. From the characteristics of the excavation, based on the hydro-mechanical coupling theory, the CRD construction process in the weathered slot is simulated with finite element software ABAQUS. The distributions of stresses, external water pressures and displacements in the host rock, the distributions of stresses in the supporting structures, the external water pressures of initial lining during the CRD construction process are analyzed. The obtained results from the research work are useful for the tunnel construction, and it will provide references to other projects in practice.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2008年第5期873-884,共12页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金资助项目(50579087,90510019)
国家自然科学基金委重大国际合作项目(50720135906)
中交集团科技资助项目
关键词
海底隧道
CRD工法
流固耦合
有限元模拟
subsea tunnel
CRD construction method
fluid-solid coupling
finite element simulation
作者简介
陈卫忠（1968-），男，博士，1990年毕业于山东矿业学院采矿工程专业，现任研究员、博士生导师，主要从事隧道及地下工程方面的教学与研究工作。E-mail：wzchen@whrsm．ac．cn
