The response of caisson induced by adjacent spudcan penetration in nonhomogeneous clay

IF 5.6 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Acta Geotechnica Pub Date : 2024-12-16 DOI:10.1007/s11440-024-02473-y

Xi Peng, Yongle Qi, Mi Zhou, Xihong Zhang, Yinghui Tian

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Abstract

This paper investigates the impact of spudcan foundations penetration on nearby caisson foundations, a critical aspect in offshore wind turbine system (OWT) installations. This study employs numerical simulations to analyze the responses of a caisson to adjacent spudcan penetration in nonhomogeneous clay, focusing on deformation mechanisms and their quantification through large deformation finite elements (LDFE). By validating numerical models with existing data on penetration resistance and soil deformation, and conducting an extensive parametric study, key factors influencing caisson deformation are identified, which include the proximity of the spudcan to the caisson, the caisson’s length over diameter ratio, and the soil property. The findings reveal three distinct deformation mechanisms of the caisson, leading to the development of empirical formulae for estimating the rotational angle of a caisson, where rotation angles of simulated cases are between 0° and 0.4°. This offers valuable design guidance for construction of caissons in OWTs.

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非均质黏土中相邻钻穿沉箱的响应

本文研究了海铲基础侵入对附近沉箱基础的影响，这是海上风力发电系统（OWT）安装的一个关键方面。本研究采用数值模拟方法分析了非均质粘土中沉箱对相邻铲钻的响应，重点研究了大变形有限元（LDFE）的变形机制及其量化。通过对现有穿透阻力和土体变形数据的数值模型进行验证，并进行了广泛的参数化研究，确定了影响沉箱变形的关键因素，包括铲斗与沉箱的距离、沉箱的长径比和土体性质。研究结果揭示了沉箱的三种不同的变形机制，从而建立了估计沉箱旋转角度的经验公式，其中模拟案例的旋转角度在0°到0.4°之间。这对水轮机沉箱施工具有一定的设计指导意义。

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

Acta Geotechnica ENGINEERING, GEOLOGICAL-

CiteScore

9.90

自引率

17.50%

发文量

297

审稿时长

4 months

期刊介绍： Acta Geotechnica is an international journal devoted to the publication and dissemination of basic and applied research in geoengineering – an interdisciplinary field dealing with geomaterials such as soils and rocks. Coverage emphasizes the interplay between geomechanical models and their engineering applications. The journal presents original research papers on fundamental concepts in geomechanics and their novel applications in geoengineering based on experimental, analytical and/or numerical approaches. The main purpose of the journal is to foster understanding of the fundamental mechanisms behind the phenomena and processes in geomaterials, from kilometer-scale problems as they occur in geoscience, and down to the nano-scale, with their potential impact on geoengineering. The journal strives to report and archive progress in the field in a timely manner, presenting research papers, review articles, short notes and letters to the editors.