Parametric Sensitivity Study of Deep Foundation Pit in
Upper Soft and&nbsp;Lower Hard Strata in Singapore: a Case Study of
Underground Project 


	

in
Singapore Changi Airport Development

WU Lanting, WANG Kang, ZHOU Feng

doi:10.3973/j.issn.2096-4498.2022.S1.021

2022 , Vol. 42 >Issue S1: 183 - 190

DOI: https://doi.org/10.3973/j.issn.2096-4498.2022.S1.021

Parametric Sensitivity Study of Deep Foundation Pit in Upper Soft and Lower Hard Strata in Singapore: a Case Study of Underground Project 

in Singapore Changi Airport Development

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(China Highway Engineering Consultants Corporation, Beijing 100089, China)

Online published: 2022-08-23

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Abstract

The finite element method with harden soil model are employed to conduct sensitivity study of various design parameters such as predrilling loosen effect, embedded length of retaining piles in rigid stratum, and elastic module of ground improvement layer in upper soft and lower hard strata in Singapore. The results show the following: (1) Predrilling will loosen the surrounding soil of the retaining wall to provide condition for retaining wall construction. (2) The increase of elastic module of ground reinforcement layer will increase the bending moment of retaining wall, hence, the elastic module of ground reinforcement layer should be within a certain range. (3) It is essential to vary the input parameters within a reasonable range, and sensitivity analysis should be conducted for the parameters to ensure the safety of the project.

Key words： deep foundation pit; upper soft and lower hard strata; finite element method; predrilling; embedded length; ground reinforcement; harden soil model

Cite this article

WU Lanting, WANG Kang, ZHOU Feng .

Parametric Sensitivity Study of Deep Foundation Pit in Upper Soft and Lower Hard Strata in Singapore: a Case Study of Underground Project 

in Singapore Changi Airport Development

[J]. Tunnel Construction, 2022 , 42(S1) : 183 -190 . DOI: 10.3973/j.issn.2096-4498.2022.S1.021

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