砂土地基中倾斜螺旋桩群桩上拔与水平承载特性模型试验

Translated title of the contribution: Model tests on uplift and lateral bearing characteristics of inclined helical pile group embedded in sand

Zhi Peng Liu, Gang Qiang Kong, Lei Wen, Zhi Hua Wang, Hongyu Qin

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Helical pile is widely applied in engineering, such as solar photovoltaic panel, transmission tower, etc. However, the research focused on the vertical or horizontal bearing capacities of helical piles is relatively limited. Especially, the bearing capacity and the bearing mechanism of inclined pile group are still unclear. The comparative model tests of vertical and inclined helical pile groups embedded in sand are carried out. The pile top load-displacement curves and the distribution of soil pressure on the plate of the helical pile group (vertical pile group and 15° inclined pile group) under vertical uplift or lateral load are measured. The ultimate bearing capacity, the load distribution ratio of the plate, and the group effect of inclined helical pile group under vertical uplift or lateral load are comparatively discussed. The results show that the ultimate uplift or lateral bearing capacity of the inclined helical pile group are larger than those of the vertical pile group in the model test conditions, respectively; the peak value of the plate load distribution ratio of the inclined pile group (15°) under the vertical uplift load is smaller than that of the vertical pile group; the maximum lateral earth pressure in the front and behind row of the inclined pile group is both larger than that at the same position of vertical one.

Translated title of the contributionModel tests on uplift and lateral bearing characteristics of inclined helical pile group embedded in sand
Original languageChinese (Hong Kong)
Pages (from-to)1944-1950
Number of pages7
JournalYantu Lixue/Rock and Soil Mechanics
Volume42
Issue number7
DOIs
Publication statusPublished - 10 Jul 2021

Keywords

  • Sand foundation
  • Screw pile
  • inclined piles
  • Pull-out bearing capacity
  • Horizontal bearing capacity
  • Model test

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