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黄 沛, 刘 颖, 王孝贤.硬夹层中静压桩沉桩桩端阻力分析水资源与水工程学报[J].,2017,28(2):227-232
硬夹层中静压桩沉桩桩端阻力分析
Analysis of static pressure pile-sinking tip resistance in hard interlayer
  
DOI:10.11705/j.issn.1672-643X.2017.02.39
中文关键词:  静压桩沉桩  硬夹层  桩端阻力  球孔扩张
英文关键词:static pressure pile-sinking  hard interlayer  pile tip resistance  spherical cavity expansion
基金项目:江西省科技厅青年基金项目(20161BAB216107)
作者单位
黄 沛1, 刘 颖2, 王孝贤1 (1.上海理工大学 土木工程系 上海 200093 2.南昌工程学院 土木与建筑学院 江西 南昌 330099) 
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中文摘要:
      针对在含硬夹层地区的静压桩沉桩问题,将桩端贯入过程按球孔扩张计算,建立了基于统一强度理论、大变形假设并考虑土体剪胀性的同心分层球孔扩张问题弹塑性解析解。将数值计算结果与ABAQUS有限元分析结果比较,验证了解答的正确性,比较了与硬夹层中球孔扩张的差异并分析了桩端阻力的影响因素。结果表明:内摩擦角比值对土层影响范围作用不大;黏聚力比值对土层影响范围有显著影响,随黏聚力比值增大,土层影响范围明显减小;随弹性模量比值增大,土层影响范围则有增大的趋势,土层软硬强度比值不能反映土层影响范围变化规律。
英文摘要:
      Aming at the problems occurring in static pressure pile-sinking in hard multi-layered soils, an analytical solution of spherical cavity expansion in concentric layered soil was developed based on unified strength theory, large deformation hypothesis and dilatancy of soil. The simulation results were compared with the ABAQUS finite element analysis to verify the correctness of the solution. The hard interlayer expansion difference were compared, and the influence factors for cavity expansion pressure in concentric layered soil and horizontal layered soil were discussed. The results showed that, the internal friction angle ratio had no significant influence on the interface influence distance. The cohesion ratio had significant influence on soil influence scope. The larger the cohesion ratio between hard interlayer and soft soil, the less interface influence distance was. With the increase of elastic modulus ratio, the soil layer affected scope had an increase trend, the soil strength of hard and soft radius ratio can't not reflect soil layer affected scope.
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