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Journal of Zhejiang University SCIENCE A 1998 Vol.-1 No.-1 P.

http://doi.org/10.1631/jzus.A2300180


Deformation and stability of the seawall, considering the strength uncertainty of cement mixing piles


Author(s):  Yuansheng YU, Lingling LI, Xiangmiao KONG, Chengyuan LI, Zhen GUO

Affiliation(s):  Key Laboratory of Offshore Geotechnics and Material of Zhejiang Province, College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China; more

Corresponding email(s):   nehzoug@163.com

Key Words:  Construction uncertainty, Cement mixing pile, Strength of cement-soil, Seawall stability, Random finite element method, Monte Carlo simulation


Yuansheng YU, Lingling LI, Xiangmiao KONG, Chengyuan LI, Zhen GUO. Deformation and stability of the seawall, considering the strength uncertainty of cement mixing piles[J]. Journal of Zhejiang University Science A, 1998, -1(-1): .

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publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A2300180"
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%T Deformation and stability of the seawall, considering the strength uncertainty of cement mixing piles
%A Yuansheng YU
%A Lingling LI
%A Xiangmiao KONG
%A Chengyuan LI
%A Zhen GUO
%J Journal of Zhejiang University SCIENCE A
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%I Zhejiang University Press & Springer
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A1 - Yuansheng YU
A1 - Lingling LI
A1 - Xiangmiao KONG
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A1 - Zhen GUO
J0 - Journal of Zhejiang University Science A
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A2300180


Abstract: 
The cement mixing (CM) pile is a common method of improving soft offshore ground. The strength growth of CM piles under complex conditions is affected by many factors, especially the cement and moisture content, and shows significant uncertainty. To investigate the stochasticity of the early strength of CM piles and its impact on the displacement and stability of a seawall, a series of laboratory tests and numerical analyses were carried out in this study. Vane shear tests were conducted on the cement-solidified soil to determine the relationships between the undrained shear strength su of the cement soil curing in the seawater and the cement content ac, as well as the in-situ soil-moisture content w. It can be inferred that the 24h undrained shear strength follows a normal distribution. A numerical model considering the random CM pile strength was established to investigate the deformation of the seawall. Due to the uncertainty of CM pile strength, the displacement of the seawall demonstrates a certain discreteness. The decrease of the mean undrained shear strength of CM piles causes a corresponding increase in the average displacement of the seawall. When the mean strength of CM piles is lower than a certain threshold, there is a risk of instability. Furthermore, the heterogeneity of the strength within an individual CM pile also has an impact on seawall displacement. Attention should be paid to the uncertainty of CM pile strength to control displacement and stability.

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