大跨度框架顶进下穿运营铁路施工关键技术  

Key Construction Technology of Long Span Frame Jacking Through Operating Railway

作　　者：周予启 刘卫未 马丽丽 刘越 沙国蔚 韩鞠 郭恒 谢志成 ZHOU Yuqi;LIU Weiwei;MA Lili;LIU Yue;SHA Guowei;HAN JU;GUO Heng;XIE Zhicheng(China Construction First Group Construction&Development Co.,Ltd.,Beijing 100102,China)

机构地区：[1]中建一局集团建设发展有限公司,北京100102

出　　处：《施工技术》2020年第1期113-117,共5页Construction Technology

摘　　要：以大曲率、多条线路下大跨度框架顶进的智慧大道项目为依托,根据不同顶进段铁路线特点,分别建立D便梁和纵横抬梁架空加固体系。利用有限元软件对顶进过程进行数值模拟,对两种架空加固方式的加固效果进行工前评价。根据不同加固方式采用不同的支撑桩托换施工方法,保证顶进过程的施工质量和安全,并开展顶进全过程的实时监测,及时对工艺参数进行纠偏与优化,形成了大跨度框架顶进下穿运营铁路施工关键技术。Based on the intelligent highway project of large-span frame jacking under large curvature and multiple lines,according to the characteristics of different jacking sections of railway lines,the overhead reinforcement systems of D convenient beam and longitudinal and transverse lifting beam are established respectively. The jacking process is simulated by finite element software,and the reinforcement effect of two kinds of overhead reinforcement methods is evaluated before construction. According to different reinforcement methods,different supporting pile underpinning construction methods are adopted to ensure the construction quality and safety of jacking process,and real-time monitoring of the whole process of jacking is carried out,and the process parameters are corrected and optimized in time,thus forming the key construction technology of long-span frame jacking through operational railway.

关 键 词：地下工程 框架顶进 加固 D便梁 纵横抬梁 数值模拟 施工技术 

分 类 号：TU753[建筑科学—建筑技术科学]