Case Study of Innovative Top-Down Construction Method with Channel-Type Excavation
Case Study of Innovative Top-Down Construction Method with Channel-Type Excavation
复制标题
通道式开挖自上而下创新施工法案例研究
DOI：
10.1061/(asce)co.1943-7862.0000828
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
Wang J.H.
中科院分区：
文献类型：
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作者：
Li M.G.;Chen J.J.;Xu A.J.;Xia X.H.;Wang J.H.
摘要传统的自顶向下施工方法在深基坑工程中得到广泛应用，但由于拖运距离长，施工效率低，且有可能产生过大的开挖变形和施工风险。本文介绍了上海西站地铁车站深基坑工程实例。由于基坑位于运行中的高速铁路下，必须采用自上而下的施工方法，为提高施工效率和控制开挖变形，提出了一种创新的开挖方案。该方法在开挖过程中先开挖一条运土作业通道。在可用的作业通道条件下，以分段方式同时开挖通道两侧的土体，随后进行所需的支撑体系的施工。挖出的土和建筑材料都通过通道运输。这个通道类型的构造…
AbstractAlthough the conventional top-down construction method is widely used in deep excavation, it has the drawback of low efficiency attributable to the long hauling distance and the possibility of the occurrence of excessive excavation deformation and construction risk. This paper introduces a case of deep metro station excavation at West Shanghai Railway Station. The top-down construction method must be used because the excavation is located under a running high-speed railway, and an innovative excavation scheme is proposed to improve construction efficiency and to control excavation deformation. In this method, an operation channel for earth hauling is first excavated in the middle of the excavation. With the available operation channel, the soil on both sides of the channel is excavated simultaneously in a segment pattern, and the required strut systems are subsequently constructed. Both the excavated soil and the construction materials are transported through the channel. This channel-type constru...