Deformation Law of the Diaphragm Wall during Deep Foundation Pit Construction on Lake and Sea Soft Soil in the Yangtze River Delta
- Release time:2024-08-09
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Affiliation of Author(s):
土木工程学院
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Journal:
Advances in Civil Engineering
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Abstract:
So far, there have been a large number of diaphragm walls in the Yangtze River Delta as engineering examples of deep foundation
pit maintenance structures in subway stations, but there is a lack of systematic research and summary on the deformation
characteristics of ground connecting walls. .is study aimed to clarify the deformation law of the diaphragm wall during the
excavation of a deep foundation pit in a soft soil region. Based on the monitoring data of the diaphragm wall of the deep
foundation pit of the Hangzhou metro station, the monitoring data of the deep foundation pits of 15 subway stations in Shanghai
and Ningbo cities around Hangzhou were considered. Grouping and classification methods were used to analyze the similarities
and differences in the deformation characteristics of the diaphragm wall in the three regions. .e results indicate the following: the
maximum lateral deformation of the diaphragm wall in Hangzhou increases linearly with the relative depth of the maximum
lateral deformation. .e maximum lateral deformation of the foundation pit in Hangzhou is 0.072% H∼0.459% H, with a mean of
0.173% H. .e wall deformation in Hangzhou varies significantly with the depth of the foundation pit, but the influence of the
depth of the foundation pit on the wall deformation is considerably less than that in Shanghai and Ningbo. .e corresponding
position of the maximum lateral deformation in the excavation depth increases linearly with the excavation depth of the
foundation pit, and the corresponding position of the lateral deformation of the diaphragm wall in Shanghai is more affected by
the excavation depth of the foundation pit. .e lateral deformation of the diaphragm wall increases rapidly in the range of
0 H–0.5 H, and the maximum lateral deformation occurs at 0.5 H–1.1 H.
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First Author:
meiyuan
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Indexed by:
Journal paper
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ISSN No.:
1687-8086
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Translation or Not:
no
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Date of Publication:
2021-01-19
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