Centrifuge model test on the effect of soil fluidization on the bending moment of the sheet pile wall

IF 4.2 2区工程技术 Q1 ENGINEERING, GEOLOGICAL

Soil Dynamics and Earthquake Engineering Pub Date : 2025-04-04 DOI:10.1016/j.soildyn.2025.109411

Yan-Guo Zhou, Shuai Ning, Yuan Cao, Yun-Min Chen

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引用次数: 0

Abstract

The waterfront sheet pile wall is susceptible to rotation failure under seismic loadings, resuting in soil fuidization in backfill. According to the LEAP-GWU-2022 program, Zhejiang University conducted two dynamic centrifuge model tests to investigate the soil-wall interaction and the corresponding bending moments of the sheet pile wall in liquefiable groud. The model consisted of a bottom dense sand layer, and an overlying thick medium-dense sand layer retained by a sheet pile wall. The dynamic soil-wall interaction response was observed in terms of the accelerations and excess pore pressures of the ground, as well as the displacements, rotation angles and bending moments of the sheet pile wall. It is found that the rotation of the sheet pile wall has a significant impact on the soil-wall interaction, causing a mobilized soil fluidization within the backfill and the higher bending moments of sheet pile wall. Compared with the observations in centrifuge model tests, the calculation by existing pseudo-static method overestimates the seismic stability of sheet pile wall in saturated ground under seismic loading. Besides, this study provides an essential dataset for the theoretical and numerical analysis of the soil-wall interaction in a liquefiable ground retained by sheet pile wall.

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土流化对板桩管壁弯矩影响的离心模型试验

滨水板桩墙体在地震荷载作用下易发生旋转破坏，导致回填土土化。根据LEAP-GWU-2022项目，浙江大学进行了两次动态离心模型试验，研究了可液化地基中板桩墙的土-墙相互作用及其相应的弯矩。模型由底部致密砂层和上覆板桩墙保留的厚中致密砂层组成。从地基的加速度、超孔隙压力以及板桩墙体的位移、转动角和弯矩等方面观察了土-墙动力相互作用响应。研究发现，板桩桩壁的旋转对土-墙相互作用有显著影响，导致回填体内部土体流动化，板桩桩壁弯矩增大。与离心模型试验结果相比，现有的拟静力法计算过高估计了饱和地基中板桩墙在地震荷载作用下的地震稳定性。此外，该研究还为板桩挡墙液化地基的土-墙相互作用的理论和数值分析提供了重要的数据集。

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来源期刊

Soil Dynamics and Earthquake Engineering 工程技术-地球科学综合

CiteScore

7.50

自引率

15.00%

发文量

446

审稿时长

8 months

期刊介绍： The journal aims to encourage and enhance the role of mechanics and other disciplines as they relate to earthquake engineering by providing opportunities for the publication of the work of applied mathematicians, engineers and other applied scientists involved in solving problems closely related to the field of earthquake engineering and geotechnical earthquake engineering. Emphasis is placed on new concepts and techniques, but case histories will also be published if they enhance the presentation and understanding of new technical concepts.