Inverse analysis of Hypoplastic Clay model for computing deformations caused by excavations

Kim, Sangrae; Finno, Richard J.

doi:10.1016/j.compgeo.2020.103499

Cited by 9 publications

(1 citation statement)

References 26 publications

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“…Liu et al [16] simulated the excavation deformation of the foundation-pit project of Xianghu station on Hangzhou Metro Line 1 and investigated the influence of the rate of replacement of the pit bottom reinforcement on the safety of the subway foundation pit and compared the measured data. However, the physical and mechanical parameters of the reinforced soil in the abovementioned study were mainly obtained from empirical values [17,18]. e field-reinforced soil was not measured on-site, and the value of the actual reinforced soil was not obtained.…”

Section: Introductionmentioning

confidence: 99%

Effects of Pit-Bottom-Soil Reinforcement on the Deformation of Subway Deep Foundation Pits Based on an Improved Model

Wang

Zhang

2022

Advances in Materials Science and Engineering

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Reinforcement of pit bottom soil has been utilized in subway deep foundation-pit engineering in soft-soil areas. This study proposes an improved foundation-pit excavation model to better investigate the effect of soil reinforcement at the bottom of a pit on the deformation of a subway’s deep foundation pits. The strength parameters of the reinforced soil utilized in the improved model could be obtained through a cone penetration test before and after the pit-bottom-soil reinforcement. The results show that the enveloped structure’s lateral displacement and the surface settlement outside the pit were reduced by 37% and 23% after soil reinforcement, respectively. The uplift suppression in the centre of the base exhibited a significant effect, and the uplift suppression exceeded approximately 50%. Thus, the foundation reinforcement could effectively reduce the subway foundation-pit support structure’s horizontal deformation, ground settlement, and the pit bottom soil’s uplift deformation. The bending moment of the diaphragm wall was mainly affected near the excavation surface at the bottom of the pit. The closer the support position to the surface, the smaller the effect on the axial force.

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Section: Introductionmentioning

confidence: 99%