【作者】 王帅帅； 高波； 侯旭丰； 张涛；

【Author】 WANG Shuai-shuai;GAO BO;Hou Xufeng;Zhang Tao;MOE Key Laboratory of Transportation Tunnel Engineering,Southwest Jiaotong University;

【机构】 西南交通大学交通隧道工程教育部重点实验室；

【摘要】 以某强震区天然气管道浅埋直墙拱隧道工程为依托,提出了在管道隧道下部管道周围填筑碎石土的减震技术,并通过三维地层模型动力时程分析,深入研究了填筑物刚度对管道隧道动力特性的影响,为强震区管道隧道工程抗减震设计提供参考。研究表明:在隧道下部管道周围填筑具有一定刚度的碎石土,可以有效降低隧道墙脚和拱肩处衬砌的最大主应力幅值;随着填筑碎石土弹性模量增大,隧道拱脚和拱肩处最大主应力幅值降低,综合实际工程中提高填筑物刚度的经济性和难度,建议在本工程中隧道盖板下和管道周边填筑碎石土最优弹性模量取0.4GPa。更多还原

【Abstract】 Based on an shallow buried pipe tunnel engineering in highly seismic zone,then the damping measure by filling the gravel soil around the pipes in the tunnel was proposed,and the dynamic stress characteristic of the pipe tunnel with various stiffness of the filled gravel soil was studied by 3D stratum model dynamic time history analysis,the study can provide some references for the damping design of the pipeline tunnel in the strong earthquake zone.The dynamic stress amplitude values at arch shoulders and wall foots sufficiently decreased,when the gravel soil with enough stiffness was filled around the pipes under the tunnel inspection car cover,which for the filled gravel soil in the tunnel substructure provided effective constraint when the tunnel relatively deformed.The associated values of the tunnel lining decreased as the elastic modulus of the filled gravel soil increased,and the optimal elastic modulus of the filled gravel soil is proposed to 0.4GPa in this case,when considering the economic cost and difficulty in improving the rigidity of the filling material in the practical engineering.更多还原