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Analysis of the zoning excavation monitoring data of a narrow and deep foundation pit in a soft soil area
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Analysis of the zoning excavation monitoring data of a narrow and deep foundation pit in a soft soil area
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Journal Article
Analysis of the zoning excavation monitoring data of a narrow and deep foundation pit in a soft soil area
2018
Overview
In order to study the influence of subarea excavation on the deformation and stress behavior of a subway foundation pit, the deep horizontal wall displacement, supporting axial force and surface deformation were measured and compared with other similar pit cases according to the case of a soft soil deep foundation pit for a metro station in Hangzhou. The results of the theoretical and experimental studies show that zoned excavation can reduce the aspect ratio of a single foundation pit and then the spatial effect of small excavation can be mobilized, which can effectively control lateral wall deformation and wall deformation. Higher stiffness can strengthen the integrity of the foundation pit and provide more lateral force to prevent excessive axial force fluctuation in the deep foundation pit, and its restraining effect is greater than the first excavation foundation pit. The difference in the distribution of buildings on both sides of the long and narrow pit will lead to a different deformation of the walls on both sides, which warrants attention in the design and construction.
Publisher
IOP Publishing,Oxford University Press
Subject
