吉林水利

以徐圩新区南复堆河泵闸工程为研究对象，针对研究区复杂的地质条件和泵闸工程特点，提出了钻孔灌注桩+换填法的地基处理措施。通过静载荷试验和土层物理力学参数测试，揭示了地基在不同荷载等级下的变形特性，量化分析了各土层对桩基承载力的贡献，系统分析了地基承载力与沉降的关系，并结合Abaqus数值模拟软件对地基的长期持荷沉降情况进行了模拟分析。结合长期沉降的数值模拟结果可知，地基变形呈现弹性、塑性和破坏三阶段特征，软黏土层和砂砾层是桩基承载力的主要来源；采用“钻孔灌注桩+换填法”综合处理方案，可有效控制地基沉降，长期沉降量满足设计要求。本文的研究成果为类似工程的设计与施工提供了理论依据和技术支持。

Taking the South Fudui River pump and sluice project in Xuxu New District as the research object,a foundation treatment measure of drilling and grouting pile combined with filling method is proposed based on the complex geological conditions and characteristics of the pump and sluice project in the study area.By conducting static load tests and testing the physical and mechanical parameters of soil layers,the deformation characteristics of the foundation under different load levels were revealed.The contribution of each soil layer to the bearing capacity of the pile foundation was quantitatively analyzed,and the relationship between the bearing capacity of the foundation and settlement was systematically analyzed.The research results indicate that the deformation of the foundation exhibits three-stage characteristics of elasticity,plasticity,and failure,and the soft clay layer and gravel layer are the main sources of the bearing capacity of the pile foundation.The comprehensive treatment plan of “drilled pile+replacement method” has effectively controlled the foundation settlement,and the long-term settlement meets the design requirements.The research results of this article provide theoretical basis and technical support for the design and construction of similar projects.