Variability in jacking resistance of adjacent steel pipe piles under controlled pile installation

IF 3.3 2区工程技术 Q2 ENGINEERING, GEOLOGICAL

Soils and Foundations Pub Date : 2023-12-13 DOI:10.1016/j.sandf.2023.101402

Naoki Suzuki , Kohei Nagai

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引用次数: 0

Abstract

The pile bearing capacity varies even within the same site. This study aims to gain a better understanding of the effect of pile penetration techniques on the variability of bearing capacity. The study uses data from 83 jack-in test piles to explore the variations in penetration resistance at the pile head, base, and shaft. The semivariance increases with an increase of the horizontal distance, so we focus on the semivariance between 5 m range, whose error was defined as the error due to piling workmanship. The analysis shows that the errors follow a lognormal probability distribution, and the coefficient of variation (COV) in penetration resistance at the heads and bases is about 10%, while the COV in extracted resistance varies widely, with a range of 5–25%. Little difference in the variations due to piling workmanship was observed among different penetration motions, speeds, and soil types.

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控制桩安装下相邻钢管桩顶升阻力的变化

即使在同一场地内，桩的承载力也是不同的。本研究旨在更好地了解桩入技术对承载力变异性的影响。该研究使用了83个千插式测试桩的数据，以探索桩顶、桩底和桩身的穿透阻力变化。由于半方差随水平距离的增加而增大，因此我们主要研究5 m范围内的半方差，其误差定义为由于打桩工艺造成的误差。分析表明，误差服从对数正态概率分布，头部和基部穿透阻力的变异系数(COV)约为10%，而提取阻力的变异系数(COV)变化较大，范围为5 ~ 25%。在不同的渗透运动，速度和土壤类型中，观察到由于打桩工艺的变化差异不大。

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

Soils and Foundations 工程技术-地球科学综合

CiteScore

6.40

自引率

8.10%

发文量

审稿时长

5 months

期刊介绍： Soils and Foundations is one of the leading journals in the field of soil mechanics and geotechnical engineering. It is the official journal of the Japanese Geotechnical Society (JGS)., The journal publishes a variety of original research paper, technical reports, technical notes, as well as the state-of-the-art reports upon invitation by the Editor, in the fields of soil and rock mechanics, geotechnical engineering, and environmental geotechnics. Since the publication of Volume 1, No.1 issue in June 1960, Soils and Foundations will celebrate the 60th anniversary in the year of 2020. Soils and Foundations welcomes theoretical as well as practical work associated with the aforementioned field(s). Case studies that describe the original and interdisciplinary work applicable to geotechnical engineering are particularly encouraged. Discussions to each of the published articles are also welcomed in order to provide an avenue in which opinions of peers may be fed back or exchanged. In providing latest expertise on a specific topic, one issue out of six per year on average was allocated to include selected papers from the International Symposia which were held in Japan as well as overseas.