摘要
为研究过河明挖隧道建设对邻近既有桥梁的影响,结合工程实际,通过采用有限元法对隧道建设的全过程进行模拟计算,并将模拟结果与监测结果进行了对比。通过对数据进行分析,研究了过河明挖隧道建设过程中临近既有桥梁承台的位移情况,并根据桥梁承台的空间对位移的影响和隧道建设的时间对位移的影响总结了桥梁承台位移的规律。同时将是否对桥梁承台隔离桩与地下连续墙之间的土体进行加固两种情况进行了对比分析,研究了土体加固对临近既有桥梁的保护效果。结果表明,采用分期围堰法配合三轴水泥土搅拌桩满堂加固,可有效减轻隧道建设导致的临近桥梁结构的位移,为过河明挖隧道建设中有效减小对周边环境的影响提供了指导和借鉴。
In order to study the influence of over-river open-cut tunnel construction on adjacent existing bridges,the whole process of tunnel construction was simulated by using the finite element method,and the simulation results were compared with the monitoring results.By analyzing the data,the displacement of the existing bridge cap in the process of over-river open-cut tunnel construction was studied,and the displacement rule of the bridge cap according to the influence of the space of the bridge cap on the displacement and the influence of the tunnel construction time on the displacement were summarized.A comparative analysis was made on whether the soil between the bridge cap isolation pile and the underground diaphragm wall should be strengthened,and the protection effect of soil reinforcement on the adjacent existing bridge was studied,which provides guidance and reference for effectively reducing the influence on the surrounding environment in the construction of over-river open-cut tunnel.
作者
张肇潜
邱运军
王宁
郭建涛
张宇奇
吴冰
ZHANG Zhaoqian;QIU Yunjun;WANG Ning;GUO Jiantao;ZHANG Yuqi;WU Bing(China Construction Infrastructure Co.,Ltd.,Beijing 100161,China;Beijing Public highway Link Co.,Ltd.,Beijing 100070,China;The First Company of China Eighth Engineering Division Ltd.,Ji’nan 250100,China;China Construction Engineering Industrial Technology Research Institute Co.,Ltd.,Beijing 101300,China)
出处
《建筑结构》
CSCD
北大核心
2022年第S01期2860-2865,共6页
Building Structure
基金
中建基础科技研发课题(CSCIC-2020-KT-07)
关键词
过河明挖隧道
既有桥梁
位移
数值模拟
监测
over-river open-cut tunnel
existing bridge
displacement
numerical simulation
monitoring
