紧邻地铁且狭小基坑中的既有大型混凝土结构清障及土方开挖施工
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摘要
为了保护地铁隧道而划分出的某狭长条形小基坑,集基坑狭小、坑内三轴搅拌桩满堂加固、工期紧张、交通受限等问题于一身,其土方支撑施工本身难度已经较大,且坑内还存在既有大型混凝土结构障碍物需清除,这进一步加大了施工难度。结合工程实际,对紧邻地铁的狭长条形小基坑中既有大型混凝土结构清障及土方开挖施工进行了阐述,可为类似工程提供参考。
In order to protect subway tunnel, one divided narrow, long strip and small foundation pit is designed. Because combines problems of the foundation pit are narrow and small, full reinforced by the tri-axial stirring piles, urgent construction period, and limited by traffic, the earthwork support construction itself became more difficult. Further more,there is still existing large concrete structure obstacles to be removed in the pit, it further increased the construction difficulty. Combined with the engineering practice, this paper expounds the barrier removal of existing large concrete structures and earthwork excavation construction in narrow, long strip and small foundation pit adjacent to metro, which can provide references for similar projects.
In order to protect subway tunnel, one divided narrow, long strip and small foundation pit is designed. Because combines problems of the foundation pit are narrow and small, full reinforced by the tri-axial stirring piles, urgent construction period, and limited by traffic, the earthwork support construction itself became more difficult. Further more,there is still existing large concrete structure obstacles to be removed in the pit, it further increased the construction difficulty. Combined with the engineering practice, this paper expounds the barrier removal of existing large concrete structures and earthwork excavation construction in narrow, long strip and small foundation pit adjacent to metro, which can provide references for similar projects.
引文
[1]郑仁光.上海轨道交通L13世博大道站地下结构局部清除改建设计[J].中国市政工程,2016(2):72-75.
[2]顾亚囝,朱毅敏,乔恒昌.大型地铁枢纽站施工中的地下障碍物拆除及车站结构逆作施工技术[J].建筑施工,2008,30(5):342-344.
[3]王印.深基坑开挖对紧邻地铁车站影响的位移分析及施工保护措施研究[D].上海:同济大学,2008.
[2]顾亚囝,朱毅敏,乔恒昌.大型地铁枢纽站施工中的地下障碍物拆除及车站结构逆作施工技术[J].建筑施工,2008,30(5):342-344.
[3]王印.深基坑开挖对紧邻地铁车站影响的位移分析及施工保护措施研究[D].上海:同济大学,2008.