• ISSN 0258-2724
  • CN 51-1277/U
  • EI Compendex
  • Scopus
  • Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
  • Chinese S&T Journal Citation Reports
  • Chinese Science Citation Database
Volume 30 Issue 1
Jan.  2017
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Article Contents
XIAO Chengzhi, WANG Jiayong, YANG Yaxin, ZHOU Xia. Deformation and Mechanical Performance of Buried HDPE Pipes Reinforced by Geogrids[J]. Journal of Southwest Jiaotong University, 2017, 30(1): 38-44,68. doi: 10.3969/j.issn.0258-2724.2017.01.006
Citation: XIAO Chengzhi, WANG Jiayong, YANG Yaxin, ZHOU Xia. Deformation and Mechanical Performance of Buried HDPE Pipes Reinforced by Geogrids[J]. Journal of Southwest Jiaotong University, 2017, 30(1): 38-44,68. doi: 10.3969/j.issn.0258-2724.2017.01.006

Deformation and Mechanical Performance of Buried HDPE Pipes Reinforced by Geogrids

doi: 10.3969/j.issn.0258-2724.2017.01.006
  • Received Date: 31 May 2015
  • Publish Date: 25 Feb 2017
  • To analyze load reduction performance of buried pipes reinforced by geogrids, the influence of embedment depth of the uppermost geogrid, length of geogrid, geogrid layers, sand surrounding buried pipes and buried depth of pipes on the deformation and mechanism of pipes was studied through static loading plate tests. The results show that when the length of geogrids changes from 0 to 4D (D denotes the external diameter of pipes), relative density of sand varies from 45% to 75% and reinforcement layers change from 0 to 3 or 4, the ultimate bearing capacities of load plate are respectively 1.4, 1.6 and 2.52 times the one without reinforcement. Moreover, the hoop strain plays a dominant role in buried pipes, ranging from -1.0% to 0.5%. Deformation in vertical direction is greater than that in horizontal direction. The optimal load reduction performance of pipes reinforced by geogrids was obtained when the embedment depth of the uppermost geogrid is 0.4B (B is width of loading plate), geogrid length is 4D, and geogrid layers is 3-4.

     

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