盾构下穿五里墩立交桥桩群微扰动控制技术

来源 :2016中国(深圳)城市轨道交通关键技术论坛暨第25届地铁学术交流会 | 被引量 : 0次 | 上传用户:kxianwen
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盾构法施工速度快、对周边环境影响小,在城市轨道交通隧道施工应用中独占鳌头.五里墩立交桥是合肥目前最大的互通立交桥,是联系中市区与西市区的重要节点,盾构穿越施工时已使用19年,且经过两次大修,桥梁本身对沉降变形的要求非常高,本文以合肥地铁2号线某区间盾构长距离穿越五里墩立交桥施工为研究基础,针对合肥地区中风化土层的特点,结合成功穿越的施工经验,提炼出盾构穿越重要市政桥梁桩群沉降变形控制要点.
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