CAJ | 학술논문

以CFG桩复合地基为例,采用FLAC-3D建立了复合地基三维数值分析模型,通过有无旁侧荷载条件下复合地基的变形特性、承载能力、桩土应力比和桩土荷载分担比的比较,揭示了旁侧荷载对复合地基工作性状的影响规律.研究表明,当天然地基强度较高且基础埋深较大时,按现行<建筑地基处理技术规范>JGJ79-2002确定复合地基承载力特征值,可能会严重低估复合地基的承载能力,造成不必要的浪费.
이CFG장복합지기위례,채용FLAC-3D건립료복합지기삼유수치분석모형,통과유무방측하재조건하복합지기적변형특성、승재능력、장토응력비화장토하재분담비적비교,게시료방측하재대복합지기공작성상적영향규률.연구표명,당천연지기강도교고차기출매심교대시,안현행<건축지기처리기술규범>JGJ79-2002학정복합지기승재력특정치,가능회엄중저고복합지기적승재능력,조성불필요적낭비.
Three-dimensional numerical model of the CFG pile composite ground was established by FLAC-3D,and through comparing the deformation characteristic,bearing capacity,the pile-soil stress ratio and pile-soil load share proportion of composite ground under any side of surcharge conditions,and it revealed the influence law of surcharge on performance of composite foundations. The result showed that when the intensity of natural foundation is higher and the depth of foundation is larger,if we determined the characteristic value of subgrade bearing capacity according to "Technical code for ground treatment of buildings (JGJ79-2002)",the bearing capacity of composite foundation will be seriously underestimated and result in unnecessary waste.