Statistical Analysis of Deformation Laws of Deep Foundation Pits in CollapsibleLoess
- Release time:2024-08-09
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Affiliation of Author(s):
土木工程学院
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Journal:
Arabian Journal for Science and Engineering
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Key Words:
Soil mechanics · Collapsible loess · Deep foundation pit deformation · Time and space law
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Abstract:
To define the deformation of time and space during the construction of a long and deep foundation pit in collapsible loess,
the field-measured data of 10 open excavation stations in Xi’an metro are analyzed statistically. The results indicate that the
vertical deformation of the ground and the lateral deformation of the soldier pile caused by the excavation of a long and
deep foundation pit in collapsible loess increase with time. The maximum surface subsidence decreases with the increase in
stiffness (K) of the foundation pit support system, increases linearly with the excavation depth (Hw), and decreases with the
increase in the aspect ratio of the foundation pit. The lateral maximum deformation value of the soldier pile decreases linearly
with the increase in insertion ratio and decreases with the increase in K of the support system. The surface subsidence of the
foundation pit is characterized by a “groove shape”, and the deformation of the soldier pile is characterized as the “medium
convex”. These results can provide a reference for the design and construction of similar projects in loess areas, and can predict
and evaluate the deformation size and safety of similar projects, which is of great significance for further understanding the
deformation mechanism of deep foundation pits in loess areas, thus perfecting the design theory and preventing foundation
pit accidents.
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First Author:
meiyuan
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Indexed by:
Journal paper
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ISSN No.:
2193-567X
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Translation or Not:
no
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Date of Publication:
2019-05-27
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