Numerical analysis of a piled embankment under earthquake loading

Anwer A. Mashallah, Q. S. Shafiqu, Ahmed F. Muwayez
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引用次数: 1

Abstract

Earthquakes produce massive damage in the road embankment especially if the embankment based on soft subsoil, and this damage which in turn causes great economic losses for maintenance and rehabilitation. Last decades Iraq and the surrounding region faced many earthquakes where the most powerful earthquake happened in 2017 near the Iraq-Iran border specifically at “Halabjah” city. Thus engineers have been focusing on their road embankment design to sustain such earthquakes, by using piles as a foundation for the superstructure. In this research a numerical study for the piled embankment subjected to seismic excitation using three dimensional PLAXIS finite element program]. The effect of changing the pile supporting condition and the pile diameter on the embankment stability under “Halabjah” earthquake is investigated. The results shows that using piles reduces the settlement of the embankment’s crest by about 77% if the supporting condition of the piles was floating and in the case of the end bearing and anchored piles the reduction in the crest’s settlement were 88% and 94% respectively.
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地震荷载作用下桩基路堤数值分析
地震会对道路路基造成巨大的破坏,尤其是软基路基路基,而这种破坏又会给维护和修复带来巨大的经济损失。过去几十年,伊拉克及周边地区经历了多次地震,其中最强烈的地震发生在2017年伊拉克-伊朗边境附近,特别是在“哈拉布贾”市。因此,工程师们一直专注于他们的路堤设计,通过使用桩作为上层建筑的基础来承受这样的地震。本文采用三维PLAXIS有限元程序对地震作用下的桩堤进行了数值研究。研究了“Halabjah”地震作用下,改变桩的支护条件和桩径对路堤稳定性的影响。结果表明:桩在浮桩支护条件下可使路堤波峰沉降减少约77%,端承桩和锚固桩可使波峰沉降减少约88%和94%。
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