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首页> 外文会议>Proceedings of Sessions of Geo-Denver 2000, Aug 5-8, 2000, Denver, Colorado >ANALYSIS OF A FAILED BASAL REINFORCED EMBANKMENT
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ANALYSIS OF A FAILED BASAL REINFORCED EMBANKMENT

机译：一次失败的基础加固路堤分析

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摘要

An interesting failure involving geosynthetic basal reinforcement for embankments constructed on soft soil occurred at the Fresh Kills Landfill located on Staten Island, New York. The failure occurred in two stages, in May 1997 and April 1998, respectively. In this study, an attempt has been made to model the embankment from this case history using finite difference software―FLAC (Fast Lagrangian Analysis of Continua, Itasca Consulting Group, 1996). The goal of such a study is to develop the Finite Difference model as an approximate design tool for future reinforced embankments. FLAC is a two-dimensional finite-difference code that uses an explicit time-marching method to solve governing field equations. The paper presents the results of such an analysis and compares them to the field results. Various stages of construction are simulated by applying different model loading conditions at different stages of the analysis. The development of excess pore water pressures with staged construction are captured by using the undrained mode of analysis. The limits of failure and zone of movement are found to be strikingly similar to the field observations. It is expected that the proposed research will contribute to the state of the art of analyzing and designing embankments reinforced with geosynthetics in basal layers.
机译：在纽约史泰登岛的Fresh Kills垃圾填埋场发生了一个有趣的故障，涉及在软土上筑筑路堤的土工合成基础加固。该故障分两个阶段发生，分别在1997年5月和1998年4月。在这项研究中，已经尝试使用有限差分软件FLAC（快速连续拉格朗日分析法，Itasca Consulting Group，1996）从该案例历史中对路堤进行建模。这项研究的目的是开发有限差分模型，作为未来加筋路堤的近似设计工具。 FLAC是一种二维有限差分代码，它使用显式的时间前进方法来求解控制场方程。本文介绍了这种分析的结果，并将其与现场结果进行了比较。通过在分析的不同阶段应用不同的模型加载条件来模拟施工的各个阶段。通过使用不排水的分析模式，可以捕获阶段施工过程中产生的多余孔隙水压力。发现破坏的极限和运动区域与实地观察非常相似。预计拟议的研究将有助于分析和设计基础层中加有土工合成材料的路堤的技术发展水平。

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