Model tests on deformation characteristics of foundation pit at Luoyang Railway Station

MU Huan-dong; DENG Ya-hong; ZHANG Wen-dong; SONG Deng-yan

doi:10.11779/CJGE2021S1036

Volume 43 Issue S1

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Chinese Journal of Geotechnical Engineering > 2021 > 43(S1): 198-203. > DOI: 10.11779/CJGE2021S1036

MU Huan-dong, DENG Ya-hong, ZHANG Wen-dong, SONG Deng-yan. Model tests on deformation characteristics of foundation pit at Luoyang Railway Station[J]. Chinese Journal of Geotechnical Engineering, 2021, 43(S1): 198-203. DOI: 10.11779/CJGE2021S1036

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Model tests on deformation characteristics of foundation pit at Luoyang Railway Station

1.
Xi'an University of Technology, Xi'an 710048, China
2.
Department of Geology Engineering, Chang′an University, Xi'an 710054, China
3.
Xi'an Municipal Environmental Monitoring Station, Xi'an 710016, China
4.
China JK Institute of Engineering Investigation and Design Co.Ltd., Xi'an 710043, China

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Received Date: December 14, 2020
Available Online: December 05, 2022

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Abstract

Abstract

With the support project of open-cut foundation pit of Luoyang Railway Station as the background, three groups of small-scale model tests are carried out to study the variation of lateral displacement of support structures of foundation pit during the excavation process, and the variation law of displacement of support piles after excavation and the consideration of the different pile spacings are discussed.The results show that the displacement of piles increases first and then decreases with the increase of the depth of foundation pit, and increases slowly and sharply in the middle of foundation pit.The maximum displacement depth of piles is 1/6 of the depth of foundation pit at the bottom of foundation pit, and the displacement of piles reaches 3.91 cm.The displacement of pile body increases with the ground load.The maximum displacement of piles is 1.8 cm.The displacement of piles increases by 41.1%and the maximum displacement of piles is 2.54 cm as the distance increases to 1/2 of the top of foundation pit.When the distance increases to 1/6 of the bottom of foundation pit, the displacement of piles increases sharply.The maximum displacement of piles is 3.91 cm, which is nearly 1.2 times larger than that of the top 1/6 of the foundation pit.The research results have important guiding significance for the design of deep foundation pit of Luoyang Railway Station.
- subway station,
- row pile-inner support,
- foundation pit support,
- deformation characteristic,
- model test

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