东伦敦沉桩基础的再利用

IF 0.4 Q4 ENGINEERING, CIVIL
P Morrison, Lohini Ganesharatnam
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引用次数: 0

摘要

伦敦码头区的多个重建阶段导致需要用新的、通常更大的结构取代现有结构。本文介绍了一座20世纪80年代的低层办公楼(3-4层)被中层(5层+屋顶露台)休闲建筑结构所取代的案例历史。这座20世纪80年代的建筑建立在伦敦历史悠久的码头之一的驱动封闭式钢管桩上。在20世纪80年代的建筑建设之后,伦敦地铁隧道在20世纪90年代末在靠近该结构的码头下方建造。在靠近隧道的码头打桩,对桩的施工方法造成了限制。新结构重复使用了码头上的打孔桩,并增加了新的陆上钻孔桩,以适应更大的建筑面积。桩的再利用论证采用了原始的初步桩荷载试验和打桩记录以及现行的设计规范。1980年代设计图纸上规定的允许工作载荷小于支撑新建筑所需的载荷,因此需要重新解释初步桩荷载测试结果。桩的再利用评估表明,桩的工作荷载从1050 kN增加到1760 kN。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Driven pile foundation reuse in East London
Multiple phases of redevelopment of the London Docklands have resulted in the need to replace existing structures with new, often larger, structures. This paper presents the case history of a 1980’s low rise office building (3-4 stories) being replaced by a medium rise (5 stories + roof terrace) recreational building structure. The 1980’s building was founded on driven close-ended steel tube piles located within one of London’s historic docks. Subsequent to the 1980’s building construction, London Underground tunnels were constructed below the dock in the late 1990’s in close proximity to the structure. Piling in the dock adjacent to the LU tunnels results in restrictions to pile construction methodology. The new structure reused the driven piles in the dock and added new onshore bored piles to accommodate a larger building footprint landward. The pile reuse justification used the original preliminary pile load test and driving records along with current design codes. The 1980’s allowable working loads stated on the design drawing were less than that required to support the new building thereby requiring re-interpretation of preliminary pile load test results. The pile reuse assessment justified an increase in pile working load from 1050 kN to 1760 kN.
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来源期刊
CiteScore
1.70
自引率
0.00%
发文量
28
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