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Evaluation of Performance of Walls in Deep Excavations Using Wall Deflection Paths

机译:利用墙体变形路径评估深基坑墙体的性能

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摘要

This paper discusses the concept of wall deflection path and reference envelope and illustrates its applications on evaluating the performance of diaphragm walls in deep excavations carried out in thick soft deposits. Numerical analyses were performed for a cut-and-cover section of the Taipei Metro to verify this concept and to quantify the influences of four factors, i.e., the preloading of struts, wall thickness, wall length, and width of excavation on wall deflections. It has been found that the width of excavation is the most influential factor on maximum wall deflections while the thickness and the length of walls have dominating influence on toe stability.
机译:本文讨论了壁挠曲路径和参考包络线的概念,并说明了其在评估厚软土层中深基坑中隔板墙的性能方面的应用。对台北地铁的挖方和断面进行了数值分析,以验证这一概念并量化四个因素的影响,即撑杆的预载,壁厚,壁长和开挖宽度对壁挠度的影响。已经发现,开挖的宽度是最大壁挠度的最大影响因素,而壁的厚度和长度对脚趾的稳定性起主要作用。

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