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基于HS模型的预制混凝土管桩抗拔承载性能研究

Research on the Uplift Bearing Capacity of Precast Concrete Pipe Piles Based on HS Model
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摘要 桩基的性能对工程质量有着直接的影响,提升桩基的抗拔承载性能是非常必要的.通过构建HS模型,利用PLAXIS 3D有限元软件进行数值模拟,分析不同的单桩参数、布桩数量、桩距以及水平荷载等对预制混凝土管桩的抗拔承载能力产生的影响,并针对实际工程与MC模型进行对比.研究结果表明,HS硬化土土体本构模型在分析预制混凝土管桩基础抗拔承载特性上比MC模型更为准确,桩群桩距为5d是最优桩距,并且在工作荷载正常的条件下水平荷载对桩基的性能影响较小,但是随着后期加载会在一定程度上降低抗拔承载能力. The performance of pile foundation has a direct impact on the quality of the project,so it is necessary to improve the uplift bearing characteristics of pile foundation.In view of this,the HS model is constructed and the numerical simulation is carried out by using PLAXIS 3 Dfinite element software to analyze the influence of different single pile parameters,different pile number,pile spacing and different horizontal loads on the uplift bearing capacity of precast concrete pipe piles,and to compare the actual project with MC model.The results show that the HS hardened soil constitutive model is more accurate than MC model in analyzing the uplift bearing characteristics of precast concrete pipe pile foundation.The pile group spacing of 5 dis the optimal pile spacing,and the horizontal load has little influence on the performance of pile foundation under normal working load,but with the later loading,the uplift bearing capacity will be reduced to a certain extent.
作者 李菊 LI Ju(Dept.of Architecture and Civil Engineering,Weifang Engineering Vocational College,Weifang 262500,China)
出处 《淮海工学院学报(自然科学版)》 CAS 2019年第1期72-76,共5页 Journal of Huaihai Institute of Technology:Natural Sciences Edition
关键词 预制混凝土管桩 抗拔承载 HS模型 MC模型 数值模拟 precast concrete pipe piles uplift bearing HS model MC model numerical simulation
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