明挖隧道上跨地铁施工技术

摘要

介绍郑州市郑东新区综合交通枢纽区地下道路工程上跨既有地铁1号线盾构区间隧道的施工方案，为降低明挖隧道施工的减载效应对盾构隧道管片结构的影响，采用“三轴搅拌桩加固土体+抽条法施工”的综合施工技术，保证盾构隧道结构的稳定及地铁运营列车的安全。%This paper introduces the construction scheme of the road tunnel of integrated transport hub overpassing the exsiting shield tunnel of Metro Line 1 in Zhengzhou Zhengdong New District. In order to reduce the effect of load shedding of open cut tunnel construction on the segment structure of shield tunnel, the comprehensive construction technology of "fasten by triaxial mixing pile+ extracting construction"is used to ensure the stability of the structure of the shield tunnel and the safety of the subway train.