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首页> 外文会议>Deep Foundations 2002: an International Perspective on Theory, Design, Construction, and Performance >Static Capacity Analysis of Augered, Pressure-Injected Displacement Piles
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Static Capacity Analysis of Augered, Pressure-Injected Displacement Piles

机译：螺旋压桩桩的静力分析

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摘要

Augered, pressure-injected displacement (APID) piles develop significantly higher capacities than conventional augercast (APG) piles in loose to medium dense, granular materials. During APID installation, a Ko to Kp environment is created in the materials surrounding the pile immediately prior to casting, and this condition results in increased shaft resistance in soils where displacement leads to densification. Current augercast design methodologies assume a Ko to Ka condition in the vicinity of the pile, and thus the body of knowledge associated with conventional APG piles would be expected to be a conservative base line from which to begin assessing the capacity APID pile systems. This paper offers an empirical design methodology for APID piles, based on evaluation of 28 load tests, primarily in granular materials and in a variety of geologic settings. A design process that includes modification for soil types within the coarse-grained range is presented for CPT and SPT exploratory information.
机译：在从松散到中等密度的颗粒状材料中，螺旋压力注入位移（APID）桩的承载能力明显高于传统的螺旋桩（APG）。在APID安装过程中，在浇铸之前，会在桩周围的材料中创建从Ko到Kp的环境，这种情况会导致土壤中的竖井阻力增加，从而导致位移致密化。当前的螺旋浇铸设计方法假设桩附近存在Ko到Ka的条件，因此，与常规APG桩相关的知识体系将被认为是保守的基线，可从中开始评估APID桩系统的承载力。本文基于28种载荷试验的评估结果，为APID桩提供了一种经验设计方法，主要是在颗粒材料和各种地质环境中进行的。针对CPT和SPT探索性信息，提出了包括对粗粒度范围内的土壤类型进行修改的设计过程。

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