Experimental and numerical insights into geosynthetic behavior in pile-supported embankments

IF 5.5 2区工程技术 Q1 ENGINEERING, CIVIL

Transportation Geotechnics Pub Date : 2025-09-17 DOI:10.1016/j.trgeo.2025.101733

Atefeh Tardast , S. Hamid Lajevardi , Laurent Briançon , S. Mohammad Mirhosseini

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引用次数: 0

Abstract

Pile-supported embankments on soft soil are currently reinforced by geosynthetics. Many analytical methods have been developed to design geosynthetics, but they are simplistic and do not consider all of the complexity of the developed mechanisms. Despite all of the difficulties met when simulating the behavior of pile-supported embankments in a laboratory, it has been shown that 1 g physical modeling tests can help in understanding this behavior. A new small-scale model is developed to reproduce the behavior of a pile-supported embankment at a scale of 1/10. A study is conducted to find and qualify a foam simulating the behavior of soft soil. The first tests validate the ability of the device to simulate the behavior of a pile-supported embankment correctly. The numerical procedure could also be used to define the load distribution mechanism in geosynthetic pile-supported embankment. Accurate reproduction of stress mechanisms in pile-supported systems requires strict experimental control. Laboratory tests revealed edge and toe stress concentrations, while numerical simulations showed an inverse distribution. These results underscore the necessity of isolating the central grid and realistically modeling soft soil behavior.

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桩支撑路堤中土工合成行为的实验和数值见解

软土上的桩基路堤目前主要采用土工合成材料加固。许多分析方法已经发展到设计土工合成材料，但他们是简单的，并没有考虑到所有的复杂发展的机制。尽管在实验室中模拟桩基路堤的行为时遇到了所有困难，但已经表明1g物理建模测试可以帮助理解这种行为。建立了一种新的小尺度模型，以再现1/10比例的桩基路堤的行为。对模拟软土特性的泡沫进行了寻找和鉴定。第一次测试验证了该设备正确模拟桩支撑路堤行为的能力。数值计算也可用于确定土工合成桩基路堤的荷载分布机制。准确再现桩基体系的应力机制需要严格的实验控制。实验室测试显示边缘和脚趾应力集中，而数值模拟显示相反的分布。这些结果强调了隔离中心网格和真实模拟软土行为的必要性。

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来源期刊

Transportation Geotechnics Social Sciences-Transportation

CiteScore

8.10

自引率

11.30%

发文量

194

审稿时长

51 days

期刊介绍： Transportation Geotechnics is a journal dedicated to publishing high-quality, theoretical, and applied papers that cover all facets of geotechnics for transportation infrastructure such as roads, highways, railways, underground railways, airfields, and waterways. The journal places a special emphasis on case studies that present original work relevant to the sustainable construction of transportation infrastructure. The scope of topics it addresses includes the geotechnical properties of geomaterials for sustainable and rational design and construction, the behavior of compacted and stabilized geomaterials, the use of geosynthetics and reinforcement in constructed layers and interlayers, ground improvement and slope stability for transportation infrastructures, compaction technology and management, maintenance technology, the impact of climate, embankments for highways and high-speed trains, transition zones, dredging, underwater geotechnics for infrastructure purposes, and the modeling of multi-layered structures and supporting ground under dynamic and repeated loads.