拉土改良土壤：对可液化砂土中土-结构相互作用的影响

IF 5.3 1区工程技术 Q1 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS

Computers and Geotechnics Pub Date : 2025-05-22 DOI:10.1016/j.compgeo.2025.107360

Jinghua Zhang , Zhihua Yang , Emilio Bilotta , Lucia Mele , Qing Sun , Haitao Yu , Yong Yuan

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引用次数: 0

摘要

本文研究了拉土处理作为一种缓解地震引起的土壤液化的技术的效果及其对土-结构相互作用的影响。首先，对净化后的Hostun砂进行了不排水循环三轴试验。试验证实，拉天石可以增强处理砂的抗液化能力，并且PM4Sand本构模型能够通过调整相关本构参数来捕捉清洁和拉天石处理的Hostun砂的主要动态行为。然后，基于两种拉土处理方案的离心试验，利用OpenSees和PM4Sand构建二维平面应变有限元模型。数值结果与离心试验数据吻合较好，验证了数值土结构体系的有效性。最后，重新配置了数值模型，测试了在可液化土壤中，拉土处理对浅埋隧道、地表结构以及两者结合的土-结构相互作用的影响。

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Soil improvement with laponite: effects on soil-structure interaction in liquefiable sands

This paper investigates the effects of laponite treatment as a mitigation technique against seismically induced soil liquefaction and its influence on soil-structure interaction. Firstly, undrained cyclic triaxial tests are conducted on clean and laponite-treated Hostun sands. The tests confirm that laponite could enhance the resistance of the treated sand against liquefaction and that the constitutive model PM4Sand is able to capture the main aspects of the dynamic behavior of both clean and laponite-treated Hostun sands, by adjusting the relevant constitutive parameters. Then, two-dimensional plane-strain finite element models are constructed using OpenSees and PM4Sand based on the centrifuge tests involving two schemes of laponite treatment. The numerical results match well with the centrifuge test data, thus verifying the validity of the numerical soil-structure systems. Finally, the numerical models are re-configured to test the effects of laponite treatment on the soil-structure interaction of a shallow buried tunnel, a surface structure, and a combination of the two in liquefiable soils.

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来源期刊

Computers and Geotechnics 地学-地球科学综合

CiteScore

9.10

自引率

15.10%

发文量

438

审稿时长

45 days

期刊介绍： The use of computers is firmly established in geotechnical engineering and continues to grow rapidly in both engineering practice and academe. The development of advanced numerical techniques and constitutive modeling, in conjunction with rapid developments in computer hardware, enables problems to be tackled that were unthinkable even a few years ago. Computers and Geotechnics provides an up-to-date reference for engineers and researchers engaged in computer aided analysis and research in geotechnical engineering. The journal is intended for an expeditious dissemination of advanced computer applications across a broad range of geotechnical topics. Contributions on advances in numerical algorithms, computer implementation of new constitutive models and probabilistic methods are especially encouraged.