CAJ | 학술논문

基于散体介质理论建立流塑状土中 CFG 桩的力学模型，分析了水平荷载作用下流塑状软土复合地基的变形特性及破坏模式，并研究了土的细观力学特征与桩土相互作用宏观力学行为之间的联系。研究结果表明，在水平附加荷载作用下桩周土应力最大值位置与其刚度、黏聚力有关，流塑状软土复合地基中存在桩周土绕过桩现象，其中桩周土位移是桩顶位移的30倍左右。提出了流塑状软土复合地基桩体“视抗剪强度”的概念，该强度指在水平附加荷载作用下发生结构性破坏时桩体发挥的强度。
기우산체개질이론건립류소상토중 CFG 장적역학모형，분석료수평하재작용하류소상연토복합지기적변형특성급파배모식，병연구료토적세관역학특정여장토상호작용굉관역학행위지간적련계。연구결과표명，재수평부가하재작용하장주토응력최대치위치여기강도、점취력유관，류소상연토복합지기중존재장주토요과장현상，기중장주토위이시장정위이적30배좌우。제출료류소상연토복합지기장체“시항전강도”적개념，해강도지재수평부가하재작용하발생결구성파배시장체발휘적강도。
Based on the granular medium theory,the mechanical model for the CFG pile embedded in the liquid-plastic soil was built,the deformation characteristics and damage models of the liquid-plastic soft soil composite base under lateral loading were analyzed,and the relation of soil's micromechanics and the macro-mechanical behavior in the interaction betw een soil and pile w as studied. T he results indicate that under additional lateral loading,the maximum stress of pile-adjacent soil is influenced by the changes of stiffness and cohesive force. At the same time,it is also noticed that the adjacent soil tends to detour around the pile,with the displacement of the adjacent soil 30 times larger than the pile-tip soil. O n this basis,the paper proposes the concept of“visual shear strength”for the pile embedded,which refers to the strength the pile generates at the structural damage of the liquid-plastic soft soil composite base under additional lateral loading.