NUMERICAL SIMULATION OF THE SUCCESSIVE PENETRATION OF JACKED PILE IN LAYERED COHESIVE SOIL AND SAND
NUMERICAL SIMULATION OF THE SUCCESSIVE PENETRATION OF JACKED PILE IN LAYERED COHESIVE SOIL AND SAND
复制标题
层状粘性土和砂中静压桩连续贯入的数值模拟
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
寇海磊
中科院分区：
文献类型：
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作者：
张明义;寇海磊
分析了静压桩在软硬互层土中的沉桩阻力变化规律，采用不同的本构模型，粘性土采用修正的cam clay模型，砂土采用修正的Drucker-Prager模型，利用ABAQUS软件更合理地模拟了静压桩在成层土特别是粘性与桑迪互层土中的沉桩阻力，同时，结合工程实例，成功地模拟计算了静压桩在性质差异较大的层状土和软土中的刚性土-夹层中的连续贯入过程，得到了贯入过程中桩阻力随深度的变化曲线，数值分析结果与现场观测结果吻合较好，为静压桩贯入概率分析提供了依据，挤桩效应
The change of penetration resistance of jacked piles in interactive soft and hard layered soil is analyzed.Different constitutive models have been adopted,including modified cam clay model for cohesive soil and Modified Drucker-Prager model for sand in order to simulate the penetration of jacked piles more reasonably in layered soil particularly in interactive cohesive and sandy layered soil with ABAQUS.Simultaneously,a series of other measures are taken to make the initial stress equilibrium in layered soil.Combining with an engineering case,the process of successive penetration of jacked pile in layered soil with significantly different properties and stiff soil-interlayer in soft soil is simulated and calculated successfully,with the variation cure of pile resistance with depth in penetration process being obtained,which can reflect the abrupt change phenomenon of stress around pile and jacking resistance.The conclusion of numerical analysis is consistent with the field observations.The research results can help probability analysis on penetration of jacked piles and pile squeezing effect.