穿越断层破碎带特大跨度铁路隧道减震技术研究  

Research on Vibration Reduction Technology for Super Large Span Railway Tunnels Passing through Fault Fractured Zones

作　　者：彭斌 杜泽辉 余鹏 谢良坤 Peng Bin;Du Zehui;Yu Peng;Xie Liangkun(Urban Rail Transit Design and Research Institute,China Railway Engineering Design Consulting Group Co.,Ltd.,Beijing 100055,China;Engineering Management Department,Guangdong Yuedong Intercity Railway Co.,Ltd.,Xiamen,Shantou 515021,China;Science and Technology Department,China Railway Engineering Design Consulting Group Co.,Ltd.,Beijing 100055,China;School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]中铁工程设计咨询集团有限公司城市轨道交通设计研究院,北京100055 [2]广东粤东城际铁路有限公司工程管理部,厦门汕头515021 [3]中铁工程设计咨询集团有限公司科技处,北京100055 [4]北京交通大学土木建筑工程学院,北京100044

出　　处：《铁道技术标准（中英文）》2023年第10期15-21,共7页Railway Technical Standard(Chinese & English)

基　　金：中国国家铁路集团有限公司科技研究开发计划(K2021G023)。

摘　　要：本文依托国内某特大跨度铁路隧道修建工程,针对特大跨铁路隧道穿越断层破碎带开展减震技术研究,采用数值模拟方法,设置无断层、有断层和不同注浆加固参数,以及有无减震层等多个工况,分析二次衬砌结构的加速度响应、位移,以及衬砌结构内力等指标,并进行减震效果评价。结果表明:断层破碎带的存在使隧道结构在地震作用下的峰值加速度、位移和内力显著提高,采用断层破碎带内注浆的措施可起到良好的减震作用;在围岩荷载和地震惯性力共同作用下,隧道结构拱脚位置出现了较大弯矩和剪力值,可通过优化结构截面尺寸和配筋,并在施工过程中尽早封闭成环的措施改善其工作状态;设置减震层,允许隧道结构发生一定程度的相对变形,虽然使隧道加速度和位移有所增大,但减震层的缓冲作用降低了隧道二衬结构的内力,可起到良好的减震效果。This paper based on the construction of a large span railway tunnel in China,conducts research on seismic reduction technology for the crossing of fault fractured zones by a large span railway tunnel.Numerical simulation methods are used to set multiple service conditions with and without fault,with different grouting reinforcement param⁃eters,and with and without seismic reduction layer,to analyze the acceleration response,displacement,and internal force of the secondary lining structure and evaluate the seismic reduction effects.The results show that the presence of fault fractured zones will significantly increase the peak ground acceleration,displacement,and internal force of tun⁃nel structures under earthquake action.The use of grouting measures in fault fractured zones can have a good seismic damping effect;under the combined action of surrounding rock load and seismic inertia force,there are significant bending moments and shear values at the arch foot of the tunnel structure.Measures can be taken to improve its ser⁃viceability state by optimizing the cross⁃sectional size and reinforcement of the structure,and closing it into a ring as early as possible during the construction process;setting⁃up a damping layer allows for a certain degree of relative de⁃formation of the tunnel structure.Although the acceleration and displacement of the tunnel are increased,the buffer effect of the damping layer reduces the internal force of the tunnel secondary lining structure and obtain a good damp⁃ing effect.

关 键 词：穿越断层破碎带 特大跨度铁路隧道 减震技术 注浆加固 减震层 

分 类 号：U25[交通运输工程—道路与铁道工程]