双线盾构下穿对铁路框架桥的扰动影响分析与控制  

Analysis and control of disturbance influence of double-line shield under-passing on railway frame bridge

作　　者：蒋磊 陈立 王浪波 梁小强 杨仙 JIANG Lei;CHEN Li;WANG Langbo;LIANG Xiaoqiang;YANG Xian(Changsha Metro Group Co.,Ltd,Changsha,Hunan 410027,China;College of Civil Engineering,Hunan City University,Yiyang,Hunan 413000,China)

机构地区：[1]长沙轨道交通集团有限公司,湖南长沙410027 [2]湖南城市学院土木工程学院,湖南益阳413000

出　　处：《湖南城市学院学报（自然科学版）》2024年第3期15-21,共7页Journal of Hunan City University:Natural Science

基　　金：湖南省自然科学基金项目(2021JJ50147)。

摘　　要：以某地铁双线盾构下穿京广铁路框架桥为工程背景,通过现场监测及数值模拟,研究了四孔铁路框架桥的最大隆沉量、倾斜度及相邻框架结构之间的沉降差,并分析了其产生的原因。研究结果表明:框架桥的整体隆沉趋势,除与盾构开挖地层损失与扰动、注浆加固有关外,也与框架桥自身的倾斜变形及相互作用有关。根据该区域具体工程地质、水文地质条件及环境扰动控制要求,提出了通过注浆预加固、施工过程中的同步注浆及二次补注浆、盾构掘进参数控制等手段以保证施工顺利进行。Based on the engineering background of a subway double-line shield under-passing the frame bridge of Beijing-Guangzhou Railway,this paper studies the maximum deformation,inclination and deformation difference between adjacent frame structures of the four-hole railway frame bridge through on-site monitoring data and numerical simulation,and analyzes the causes of the deformation trend.The results show that the overall deformation of the frame bridge is not only related to the ground loss and the disturbance of shield excavation and grouting reinforcement,but also related to the inclined deformation and interaction of the frame bridge itself.According to the specific engineering geological and hydro-geological conditions and environmental disturbance control requirements in this area,it is proposed that the safety in construction process can be ensured by means of grouting per-reinforcement,synchronous grouting and secondary supplementary grouting in the construction process,and shield tunneling parameters control.

关 键 词：双线盾构 下穿 铁路框架桥 沉降 注浆 

分 类 号：TU9[建筑科学]