Evaluation of Pile Driving Effects on Slope Stability in Clay

IF 1.7 Q3 ENGINEERING, GEOLOGICAL

Geotechnical and Geological Engineering Pub Date : 2023-09-21 DOI:10.1007/s10706-023-02636-w

Yeganeh Attari, Hans Petter Jostad, Gustav Grimstad, Gudmund Reidar Eiksund

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引用次数: 0

Abstract

Abstract Pile driving can trigger slope failure, specifically in sensitive soil deposits or marginally stable slopes. Cases of slope failure during pile installation have been reported in countries such as Norway, Sweden and Canada where soft sensitive clay deposits are prevalent. Although a few approaches have been suggested to assess the factor of safety of a slope during pile driving, there is currently no standard method recognized by the geotechnical society to account for the reduction of safety factor of a slope as an effect of pile installation. Some approaches suggest using the excess pore pressure generated during pile driving to account for the reduction in soil strength (by reducing effective stresses), neglecting the change in total stresses. This paper discusses the accuracy of stability analysis methods currently in use for this problem by looking at stress changes in the soil during pile driving as well as using numerical analysis results. Importantly, the paper identifies the shortcomings regarding these approaches, thus allowing geo-engineers to understand the limitations of their analysis and the uncertainties in the models.

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土中打桩对边坡稳定性影响的评价

摘要打桩会引发边坡破坏，特别是在敏感的土质沉积物或边缘稳定的边坡中。在挪威、瑞典和加拿大等软敏感粘土沉积物普遍存在的国家，已经报道了桩安装过程中边坡破坏的情况。虽然已经提出了几种方法来评估打桩过程中边坡的安全系数，但目前岩土工程界还没有公认的标准方法来解释由于安装桩而导致的边坡安全系数降低。一些方法建议使用打桩过程中产生的超孔隙压力来解释土强度的降低(通过降低有效应力)，而忽略总应力的变化。本文通过观察桩身土体在打桩过程中的应力变化，并结合数值分析结果，对目前常用的稳定性分析方法的准确性进行了探讨。重要的是，本文指出了这些方法的缺点，从而使地球工程师了解他们分析的局限性和模型中的不确定性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Geotechnical and Geological Engineering ENGINEERING, GEOLOGICAL-

CiteScore

3.70

自引率

5.90%

发文量

298

期刊介绍： Geotechnical and Geological Engineering publishes papers in the areas of soil and rock engineering and also of geology as applied in the civil engineering, mining and petroleum industries. The emphasis is on the engineering aspects of soil and rock mechanics, geology and hydrogeology, although papers on theoretical and experimental advances in ground mechanics are also welcomed for inclusion. The journal encompasses a broad spectrum of geo-engineering although several areas have been identified which will be given particular priority: Soil and rock engineering; Foundation engineering; Applied geology for design and construction; Geo-environmental engineering; Earthquake engineering and dynamic behavior of soils and rocks; Geohazards and mitigation; Mining engineering; Geotechnical aspects of petroleum engineering; Information technology applications in geo-engineering; Novel geotechnical construction techniques; Case histories describing important geo-engineering projects. Geotechnical and Geological Engineering publishes contributions in the form of original and review papers, or as short technical notes.