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An Approach for Assessing Geotechnical Reduction Factors for Pile Design

机译：一种评估桩设计中岩土折减系数的方法

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摘要

Design of piles in Australia is based on the Australian Piling Code, AS 2159 - 1995. For geotechnical design of piles for the ultimate limit state, it is necessary that the designer selects an appropriate geotechnical reduction factor, φ_g, which is applied to the estimated ultimate geotechnical capacity. The Code tabulates various ranges of φ_g, depending on the method of analysis employed, the level of testing, and other conditions pertaining to the project. Selection of φ_g requires a good measure of judgement from the designer. This paper describes an approach for making a more rational selection of φ_g. It employs, in a simplistic manner, elementary reliability concepts and calibrates the level of uncertainty with commonly-employed overall factors of safety. It then derives geotechnical reduction factors from these overall safety factors. A process is then described for quantifying the level of uncertainty and risk for a particular project into an overall risk rating, which is then used to select an appropriate value of φ_g. The application of the method is illustrated with respect to a high-rise development in South East Asia.
机译：在澳大利亚，桩的设计基于澳大利亚桩法AS 2159-1995。对于极限状态下的桩的岩土设计，设计人员必须选择适当的岩土折减系数φ_g，并将其应用于估算值。极限岩土能力。根据所采用的分析方法，测试水平以及与项目有关的其他条件，本规范将φ_g的各个范围制成表格。选择φ_g时需要设计者做出很好的判断。本文介绍了一种使φ_g更合理选择的方法。它以简单的方式采用基本的可靠性概念，并使用通用的总体安全因素来校准不确定性水平。然后从这些总体安全系数中得出岩土工程折减系数。然后描述了一种过程，用于将特定项目的不确定性和风险级别量化为总体风险等级，然后将其用于选择适当的φ_g值。举例说明了该方法在东南亚的高层建筑开发中的应用。

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  • 来源
    《To the eNZ of the Earth vol.1》|2004年|109-115|共7页
  • 会议地点 Auckland(NZ)
  • 作者

    H G Poulos;

  • 作者单位

    Coffey Geosciences Pty. Ltd. Sydney, Emeritus Professor, University of Sydney;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 地质力学;
  • 关键词

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