高水压隧道盾构管片不同拼装方式力学性能分析  

Mechanical properties of shield segments by different assembling methods in high water pressure tunnels

作　　者：彭科峰 周书剑 李树忱[1] 刘修义 唐苑寿 PENG Kefeng;ZHOU Shujian;LI Shuchen;LIU Xiuyi;TANG Yuanshou(Geotechnical&Structural Engineering Research Center,Shandong University,Jinan 250014,China;China Railway 14th Bureau Group First Engineering Development Co.,Ltd.,Rizhao 276800,China;China Railway 14th Bureau Group Tunnel Engineering Co.,Ltd.,Jinan 250014,China;Jinan Heavy Industries Group Co.,Ltd.,Jinan 250014,China)

机构地区：[1]山东大学岩土与结构工程研究中心,山东济南250014 [2]中铁十四局集团第一工程发展有限公司,山东日照276800 [3]中铁十四局集团隧道工程有限公司,山东济南250014 [4]济南重工集团有限公司,山东济南250014

出　　处：《人民长江》2023年第8期166-172,共7页Yangtze River

基　　金：国家自然科学基金项目(51879150);国家自然科学基金重点项目(41831278)。

摘　　要：水下隧道修建时,盾构管片承受着巨大水土压力,设计施工面临着重大技术难题。为此,针对江苏江阴长江水下隧道最大水压断面,分别使用修正惯用法与梁-弹簧法建立管片衬砌模型,通过调整封顶块位置与错缝角度研究了高水压下不同拼装方式对管片力学性能的影响。结果表明:修正惯用法计算结果变化平滑,而梁-弹簧法计算结果分布趋势则受接头影响,在接头位置会产生较大突变;管片力学性能受封顶块位置与错缝角度影响较大,随着错缝角度的增加,管片最大轴力、最大弯矩与最大位移以标准块圆心角度数为周期,呈周期性变化。施工过程中,为了防止产生较大位移,应尽量避免前后环管片接缝重合。研究结果可为高水压盾构隧道管片的拼装方式设计提供参考。During the construction of cross-river tunnels,the shield segments are under enormous water and soil pressure,and the design and construction are facing with major technical problems.In view of the maximum water pressure section of an underwater tunnel in Jiangyin reach of Changjiang River,a segment lining model was established by using the modified usage method and the beam-spring method respectively.The influence of different assembly methods on the mechanical properties of the segments under high water pressure is studied by adjusting the position of the capping block and the staggered joint angle.The results show that the calculation results of the modified usage method change smoothly,while the distribution trend of the beam-spring method calculation results is affected by the joints,and there is a sudden change around the position of the joints.The mechanical properties of the segment are greatly affected by the position of the capping block and the staggered joint angle.With the increasing of the staggered joint angle,the maximum axial force,bending moment and displacement of the segment change periodically with the central angle of the standard block as a period.During the construction,in order to prevent large displacement,it is necessary to avoid the overlap of the front and rear ring segment joints.The above results can provide a reference for the design of segment assembly in high water pressure shield tunnels.

关 键 词：高水压 盾构管片 梁-弹簧法 修正惯用法 力学性能 

分 类 号：TU311[建筑科学—结构工程]