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首页> 外文会议>Deep Foundations Institute 28th Annual Conference on Deep Foundations: Deep Foundations in Compressible Soil and Soft Rock >EARTH PRESSURE ACTING ON SINGLE DRIVEN PILES IN SAND
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EARTH PRESSURE ACTING ON SINGLE DRIVEN PILES IN SAND

机译：砂土中单驱动桩的土压力作用

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摘要

Earth pressure acting on piles driven in sand is playing a major role in estimating pile capacity. In literature, researchers entertained simplifying assumptions in estimating the earth pressure acting on the pile's shaft, ignoring the effects of pile installation and pile size. Empirical formulae were introduced based on laboratory or field test results, where major discrepancies can be found among these formulae. In this paper, the theory of cavity expansion and the finite element technique will be used to establish the effects of pile installation technique and pile's diameter on the earth pressure acting on the pile's shaft and accordingly on the values of the existing coefficient of passive earth pressure and overconsolidated ratio. It is of interest to note that pile driven technique and pile's diameter have significant increase on the earth pressure acting on the pile's shaft and accordingly on the overconsolidation ratio in case of loose or medium sands, while they may cause crushing and dilation in case of dense sand.
机译：作用在打砂桩上的土压力在估计桩容量中起着重要作用。在文献中，研究人员在估算作用在桩身上的土压力时简化了假设，而忽略了桩身安装和桩身大小的影响。根据实验室或现场测试结果引入了经验公式，这些公式之间可能存在重大差异。在本文中，将使用空腔扩张理论和有限元技术来确定桩安装技术和桩直径对作用在桩身上的土压力以及相应的现有被动土压力系数值的影响。和超合并比率。有趣的是，桩驱动技术和桩直径显着增加了作用在桩身上的土压力，因此在松散或中厚的沙粒情况下相应地增加了超固结率，而在密实的情况下它们可能导致破碎和膨胀砂。

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