Back-analysis of laterally loaded bored piles

IF 0.3 Q4 ENGINEERING, GEOLOGICAL Geotechnical Engineering Pub Date : 2005-04-01 DOI:10.1680/GENG.2005.158.2.63
Dora C.N. Nip, C. Ng
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引用次数: 20

Abstract

Field lateral load tests were conducted on two single 1·5 m diameter large bored piles in Hong Kong. The test piles are embedded in superficial deposits and weathered rocks with various degrees of decomposition. In this paper, the pile load test results are interpreted and reported. A simple and rational method of back-analysis for long piles, using inclinometer data and assuming a fourth-order polynomial to represent the shape of soil reaction profile, is introduced. The method, requiring only simple spreadsheet-type operations, makes it possible to incorporate non-linear concrete behaviour in the back-analysis, and to deduce the p–y curves for future design of piles in similar ground conditions. In order to verify the rational method, an analysis is carried out using the back-analysed p–y curves, and the predictions are found to agree well with the measured pile head deflections. This proposed method demonstrates how p–y curves are back-analysed rationally for long piles embedded in complex ground condi...
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横向荷载钻孔灌注桩的反分析
在香港对两根直径1.5 m的大型钻孔单桩进行了现场横向荷载试验。试桩埋设于不同程度分解的浅层沉积物和风化岩中。本文对桩载试验结果进行了解释和报道。介绍了一种简单合理的长桩反分析方法,即利用测斜仪数据,用四阶多项式表示土反力剖面的形状。该方法只需要简单的电子表格类型的操作,使得在反分析中纳入非线性混凝土行为成为可能,并为类似地面条件下的桩的未来设计推导出p-y曲线。为了验证该方法的合理性,利用反分析的p-y曲线进行了分析,发现预测结果与实测桩头挠度吻合较好。本文提出的方法论证了在复杂地基条件下对长桩进行p-y曲线合理反分析的方法。
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来源期刊
Geotechnical Engineering
Geotechnical Engineering ENGINEERING, GEOLOGICAL-
CiteScore
0.50
自引率
0.00%
发文量
0
期刊介绍: The objectives of the Association shall be the promotion of co-operation among geotechnical societies in SE Asia; and the assistance to member societies who have limited number of members. Now there is only one combined web titled: AGSSEA-SEAGS. SEAGS & AGSSEA encourage the submission of scholarly and practice-oriented articles to its journal. The journal is published quarterly. Both sponsors of the journal, the Southeast Asian Geotechnical Society and the Association of Geotechnical Societies in Southeast Asia, promote the ideals and goals of the International Society of Soil Mechanics and Geotechhnical Engineering in fostering communications, developing insights and enabling the advancement of the geotechnical engineering discipline.
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