横向荷载固定头桩群确定桩土相互作用

IF 2.5 3区 工程技术 Q2 ENGINEERING, CIVIL Geomechanics and Engineering Pub Date : 2021-01-01 DOI:10.12989/GAE.2021.26.1.013
Aysan Poorjafar, M. Esmaeili‐Falak, H. Katebi
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引用次数: 21

摘要

本文总结了考虑短桩或长桩、单桩或群桩、桩间距、桩的刚度或柔性等参数的横向荷载作用下桩的小尺度室内模拟结果。桩头与承台固定连接。此外,采用PIV法更准确地考察了上述参数对破坏机制和桩土相互作用的影响。结果表明:短桩具有刚性运动,桩身土体沿桩身总长度方向发生位移,桩身围绕某一点发生旋转,而长桩在桩身部分发生柔性运动。群效应对于长桩比短桩更明显。长桩群中径桩周围土体总位移矢量的有效深度大于导桩,短桩群中径桩的有效深度小于导桩。由于径桩周围总位移矢量的角度更大,径桩周围土体剪切应变强度大于铅桩。
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Pile-soil interaction determined by laterally loaded fixed head pile group
This paper summarizes the results of small-scale laboratory modelling of pile behavior under lateral loading, considering the parameters such as short or long, single or group, spacing and rigidity or flexibility of piles. The head of piles was fixedly connected to the cap. In addition, the PIV method has been used to examine the effect of the mentioned parameters on the failure mechanism and pile-soil interaction more accurately. The results show that the short piles have a rigid movement, the displacement of the surrounding soil has occurred along the total length of the pile and the piles rotate around a point but the long piles have a flexible movement at the part of the pile length. It seems that the group effect be more obvious for long piles than short piles. Also, the effective depth of total soil displacement vectors around the trail pile is more than the lead one in long pile group, while this depth for trail pile is less than the lead pile in short pile group. Due to the sharper angles of total displacement vectors around the trail pile, the intensity of soil shear strains around the trail pile is greater than the lead pile.
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来源期刊
Geomechanics and Engineering
Geomechanics and Engineering ENGINEERING, CIVIL-ENGINEERING, GEOLOGICAL
CiteScore
5.20
自引率
25.00%
发文量
0
审稿时长
>12 weeks
期刊介绍: The Geomechanics and Engineering aims at opening an easy access to the valuable source of information and providing an excellent publication channel for the global community of researchers in the geomechanics and its applications. Typical subjects covered by the journal include: - Analytical, computational, and experimental multiscale and interaction mechanics- Computational and Theoretical Geomechnics- Foundations- Tunneling- Earth Structures- Site Characterization- Soil-Structure Interactions
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