Calculation and Analysis of Composite Foundation and Foun-dation Settlement Under Synergistic Effect of Upper Structure-Raft-Foundation
LIU Guangcheng
WANG Jianwei
GAO Yanwei
ZHAO Na
WANG Tiansong
LIU Shunqing
Abstract：The foundation load of high-rise buildings in Beijing is large and the raft foundation is mostly irregular in shape.Conventional calculation methods cannot accurately reflect the settlement after design.Taking an L-shaped high-rise building as a case study,this paper developed a three-dimensional numerical analysis model to analyze the upper structure-raft-foundation soil-pile synergistic effects.The stress of the foundation soil,the force on the CFG pile body,and the variation law of settlement between the raft and foundation soil were analyzed.The settlement calculation results were compared with the measured values to verify the feasibility of this method.The results indicate that there is a phenomenon of stress concentration at the column foundation of the foundation soil.There is negative frictional resistance in the top area of CFG piles,and the distribution of lateral frictional resis-tance along the length of the pile is uneven.The maximum settlement in the core tube area of the L-shaped building is closely related to the length and stiffness of the lower pile group.The research results and methods provide refer-ence for the settlement analysis of similar high-rise buildings,and have practical engineering significance.
Keywords：Upper structureRaftCFG pileSettlementFinite element analysis
Publication Date：2025-06-30
Online Publishing Date：2025-08-25(First online date of this platform, not the publication date of the document)
Pages：10( 80-89 )