强夯法处理吹填砂土地基的数值模拟分析  

Numerical Simulation Analysis of Dynamic Compaction Method for Treating Hydraulic Fill Sandy Soil Foundation

作　　者：赵向阳 栗东平[1,2] Zhao Xiangyang;Li Dongping(College of Civil Engineering,Hebei University of Engineering;Research Center for Computational Mechanics and Engineering Applications,Hebei University of Engineering)

机构地区：[1]河北工程大学土木工程学院,河北邯郸056038 [2]河北工程大学计算力学与工程应用研究中心,河北邯郸056038

出　　处：《勘察科学技术》2023年第6期14-18,共5页Site Investigation Science and Technology

基　　金：国家自然科学基金资助项目(51904309);河北省自然科学基金(E2020402079);国家重点实验室开放基金(SWR-2020-004)。

摘　　要：近年来,强夯法被普遍应用于吹填土的地基处理。该文以福建省泉州市某工业园区内某工程项目为研究对象,采用ABAQUS程序建立三维有限元模型,将数值模型结果与实测数据对比,验证了ABAQUS强夯模型的可靠性,对强夯法处理吹填砂土地基的数值结果进行了分析。分析表明:单次夯击沉降量的增加随时间的增加而逐渐变缓;单次夯击的最大主应力跟深度呈负相关,该工程项目的最佳夯击次数为7次。动量增加与夯沉量增加呈正相关的关系,在工程实际中应采用“重锤低落”的夯击方式。In recent years,the dynamic compaction method is widely used in the foundation treatment of hydraulic fill soil.Taking an engineering project in an industrial park in Quanzhou City,Fujian Province as the research object,a threedimensional finite element model is established by using ABAQUS program.The numerical model results are compared with the measured data to verify the reliability of ABAQUS dynamic compaction model.After that,the numerical results of hydraulic fill sand foundation treated by dynamic compaction method are analyzed.The analysis shows that the increase of a single tamping settlement decreases gradually with the increase of time;The maximum principal stress of a single compaction is negatively correlated with depth.The best tamping times of the project should be 7.There is a positive correlation between the increase in momentum and the increase of tamping settlement.In engineering practice,the tamping method of“heavy hammer falling”should be adopted.

关 键 词：吹填砂土 强夯法 数值模拟 

分 类 号：TU472.31[建筑科学—结构工程]