山东大学学报 (工学版) ›› 2020, Vol. 50 ›› Issue (6): 82-91.doi: 10.6040/j.issn.1672-3961.0.2020.090
李连祥1,2(),邢宏侠1,2,李金良3,黄亨利1,2,王雷1,2
Lianxiang LI1,2(),Hongxia XING1,2,Jinliang LI3,Hengli HUANG1,2,Lei WANG1,2
摘要:
根据喷扩锥台压灌桩现场试验结果,运用Abaqus软件建立试验数值模型,得到竖向荷载作用下锥台扩径体(下称锥台)对周边土体的影响规律:明确锥台下2D~3D(D为锥台直径)范围土体有挤压作用,锥台下0.5 m处达到极限;锥台上部土体出现应力松弛,在锥台顶部达到极限,影响范围上延1.25D;水平影响范围为1.5D~2.5D;锥台最优喷扩角度为50°~55°;最优扩径比为2~2.75;最优位置为桩端上部D~2D;定喷翼板至桩顶下7~8 m时最佳。最优构造模型可提高承载力19%,建议采用最优构造桩型进一步提高效益,促进该桩应用。
中图分类号:
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