CAJ | 학술논문

采用三维快速拉格朗日分析程序，依据某路基试验段的工程地质和设计施工情况建立了路堤荷载下带桩帽刚性桩复合地基数值分析模型，分析了桩帽直径变化对刚性桩复合地基沉降的影响，结果表明：桩帽直径的增大能够起到提高桩荷载分担比、减小复合地基总沉降和桩土沉降差的作用，桩帽直径的变化对下卧层沉降的影响较小。根据相关文献的研究成果，建立了路堤荷载下素混凝土圆板桩帽和倒圆台桩帽的承载力计算方法，并结合实例验证了承载力计算方法可靠性。研究成果可为路堤荷载作用下刚性桩复合地基中素混凝土桩帽的设计提供参考。
채용삼유쾌속랍격랑일분석정서，의거모로기시험단적공정지질화설계시공정황건립료로제하재하대장모강성장복합지기수치분석모형，분석료장모직경변화대강성장복합지기침강적영향，결과표명：장모직경적증대능구기도제고장하재분담비、감소복합지기총침강화장토침강차적작용，장모직경적변화대하와층침강적영향교소。근거상관문헌적연구성과，건립료로제하재하소혼응토원판장모화도원태장모적승재력계산방법，병결합실례험증료승재력계산방법가고성。연구성과가위로제하재작용하강성장복합지기중소혼응토장모적설계제공삼고。
Using three-dimensional Fast Lagrangian Analysis of Continua and depending on the geological, design and construction conditions of some testing sections in certain subgrade engineering, the numerical analysis model for rigid-pile composite foundation with pile cap under embankment load is established and the influence of diameter variation of pile cap on the settlement of rigid-pile composite foundation is analyzed. The result shows that the increased diameter of pile cap can play the role of enhancing the load sharing ratio of piles and reducing the total settlement of the composite foundation and the settlement difference between piles and soil ; and the diameter variation of pile cap has little influence on the settlement of underlying layer. According to the research results in related documents, the calculation method of bearing capacity for plain concrete circular-plate pile cap and inverse cone-frustum pile cap under embankment load is established, which is verified for reliability with examples. The research result can be referred to in the design of plain concrete pile cap in rigid-pile composite foundation under embankment load.