水中单桩-冰-土相互作用的研究  

Study on Interaction of Single Pile-Ice-Soil in Water

作　　者：张群 杨令强[1] 冯现大[1] Zhang Qun;Yang Lingqiang;Feng Xianda(School of Civil Engineering and Architecture,University of Jinan,Jinan 250022,China)

机构地区：[1]济南大学土木建筑学院,济南250022

出　　处：《科技通报》2025年第3期42-50,共9页Bulletin of Science and Technology

基　　金：国家自然科学基金项目(52379102)。

摘　　要：水域中,冰层在升温下对桩的作用由冰层的膨胀位移引起,冰与桩的相互作用还受到桩土相互作用的影响。为探究水中单桩-冰-土相互作用的影响,本文利用ABAQUS软件建立单桩-冰-土三维有限元模型。在冰层表面2 h内从-15℃升温至-5℃的过程中,分析不同冰厚、不同桩身弹性模量和不同地基土对冰桩相互作用的影响。结果表明:桩土相互作用对冰层较厚时的冰桩相互作用有一定的影响,黏土地基时,桩弹性模量越大,冰桩作用处水平力和竖向力越大;地基土为粉土、黏土、砂土和碎石土时,冰桩作用处水平力和竖向力随地基土刚度的增大而增大,黏土地基时由于其内摩擦角小竖向力较小;冰桩作用处桩水平位移随桩弹性模量和地基土刚度的增大而减小。In the water area,the effect of ice on pile under rising temperature is caused by the expansion displacement of the ice,and the interaction between ice and pile is also influenced by the interaction between pile and soil.To explore the influence of single pile-ice-soil interaction,a three-dimensional finite element model of single pile-ice-soil was established using ABAQUS software.When the ice surface was heated from-15°C to-5°C within 2 hours,the influence of different elastic modulus of piles and different foundation soil on the interaction of ice and pile was analyzed under different ice thickness.The results show that the pile-soil interaction has a certain influence on the ice-pile interaction when the ice is thicker,and the larger the elastic modulus of the pile,the larger the horizontal force and vertical force of the ice-pile interaction in clay foundation;When the foundation soil is silt,clay,sand,and gravel soil,the horizontal force and vertical force of the ice-pile interaction increase with increasing foundation soil stiffness,the vertical force is smaller due to the small internal friction angle in the clay foundation;The horizontal displacement of the ice-pile interaction decreases with increasing elastic modulus of the pile and foundation soil stiffness.

关 键 词：冰桩相互作用 桩土相互作用 温度膨胀力 数值分析 

分 类 号：TU473.1[建筑科学—结构工程]