基于有限元模拟的水下地基土体力学性质变化研究  

Research on Changes in Mechanical Properties of Underwater Foundation Soil Based on Finite Element Simulation

作　　者：刘云峰 蒋勇波 吴敬斐 LIU Yun-feng;JIANG Yong-bo;WU Jing-fei(The Third Construction Engineering Company Ltd.of China Construction Second Engineering Bureau,Beijing 100070,China)

机构地区：[1]中建二局第三建筑工程有限公司,北京100070

出　　处：《工程建设与设计》2024年第18期10-12,共3页Construction & Design for Engineering

摘　　要：针对目前水下地基施工现场土体强度精密测量的难度大、影响因素多等问题,分析水下地基成桩—固结过程,通过多阶段欧拉-拉格朗日技术构建有限元数值模型。结果表明,水下地基的成桩过程中对黏土体的挤压作用导致了大量的沉桩效果,地表最大抬升约为R。在固结90 d以后,黏土体的不排水性抗剪强度增加很快,可达原强度的1.3倍。In view of the difficulty of precise soil strength measurement in underwater foundation construction site and many influencing factors,the process of pile-consolidation of underwater foundation was analyzed,and a finite element numerical model was constructed by multi-stage Euler-Lagrange technique.The results show that in the process of pile formation of underwater foundation,the extrusion of clay leads to a large amount of pile driving effect,and the maximum surface lift is about R.After 90 days of consolidation,the non-drainage shear strength of the clay increases rapidly and can reach 1.3 times of the original strength.

关 键 词：水下地基 黏土体 力学性质 有限元分析 

分 类 号：TU470.3[建筑科学—结构工程]