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首页> 外文会议>International conference on soil mechanics and geotechnical engineering;ICSMGE >Earth pressure acting on single driven piles in sand
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Earth pressure acting on single driven piles in sand

机译：土压力作用于沙子中的单根驱动桩

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Earth pressure is playing a paramount role in estimating the capacity of piles driven in sand. In the literature, reports can be found introducing simplifying assumptions to estimate the earth pressure acting on the pile's shaft. Empirical formulas were developed based on limited laboratory or field test data, where high discrepancies were reported.In this paper, the theory of cavity expansion together with the finite element technique were utilized to develop a numerical model, capable of evaluating the earth pressure acting on the pile's shaft, and accordingly, the corresponding coefficient of passive earth pressure and the overconsolidation ratio in the sand mass.Analytical model was developed to predict the capacity of these piles, utilizing limit equilibrium method of analysis. It is of interest to note that pile's capacity is significantly influenced by the driven process of the pile, and further the earth pressure acting on the pile's shaft increases due to an increase of the pile's diameter in case of loose or medium sands, while in case of dense sand, the earth pressure decreases due to particle crushing and dilation. Design theory and design procedure are presented for practicing use.
机译：土压力在估计被沙子打入的桩的能力方面起着至关重要的作用。在文献中，可以找到一些报告，其中引入了简化的假设来估算作用在桩身竖井上的土压力。根据有限的实验室或现场测试数据开发了经验公式，其中报告了高度差异。 本文利用空腔扩张理论和有限元技术建立了一个数值模型，能够评估作用在桩身上的土压力，并据此评估相应的被动土压力系数和超固结率。沙团。 利用极限平衡分析方法，建立了分析模型来预测这些桩的承载能力。有意思的是，在疏松或中等沙子情况下，由于桩直径的增加，作用在桩身上的土压力会由于桩直径的增加而大大增加，因此桩的承载能力会显着影响桩的承载能力。在稠密的沙子中，由于颗粒的破碎和膨胀，土压力会降低。介绍了设计理论和设计过程以供实际使用。

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