PMID- 36145922
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20220928
IS  - 2073-4360 (Electronic)
IS  - 2073-4360 (Linking)
VI  - 14
IP  - 18
DP  - 2022 Sep 9
TI  - Investigating the Deformation Characteristics of Buried High-Density Polyethylene 
      Pipes: Considering the Effect of Sequentially Applying Pressure and Elevating 
      Temperature.
LID - 10.3390/polym14183779 [doi]
LID - 3779
AB  - High-density polyethylene (HDPE) materials have many applications in the 
      municipal solid waste (MSW) landfills. HDPE gravity drainage pipes are commonly 
      utilized in MSW landfills because of the polymer's resistance to harsh chemical 
      conditions. When landfill wastes are freshly filled, the weight acting on the 
      leachate collection pipe increases. The temperature of the leachate collection 
      pipe increases as a result of the heat produced by the decomposition of organic 
      components after waste filling. In this paper, the effects of sequentially 
      applying pressure and elevating temperature on the deformation characteristics 
      (such as deformations and strains) of HDPE pipes are investigated. Measurements 
      of pipe deformations and circumferential strains from model experiments in which 
      110 mm HDPE pipes were backfilled with sand and subjected to 300 kPa of maximum 
      vertical pressure at temperatures of 20, 60 and 80  degrees C showed the following 
      results: (1) a classification of pipe behavior relative to the surrounding soil 
      stiffness is advantageous for HDPE pipe design; (2) when temperature increases to 
      60  degrees C and 80  degrees C, the strain distribution around the pipe changes from V-shaped to 
      U-shaped, and the pipe deformation profile changes from elliptical to 
      rectangular; (3) when temperature increases from 20  degrees C to 60  degrees C, the vertical and 
      horizontal pipe deflections increase by a factor of 1.08~1.19; (4) when 
      temperature increases from 60  degrees C to 80  degrees C, the vertical and horizontal pipe 
      deflections increase by a factor of 1.15~1.31; and (5) the existing analytical 
      method that considers two extreme interfaces can capture the deformations 
      measured in the model test well. In addition, preliminary recommendations for the 
      design of leachate collection pipes are provided based on the analysis of 
      differences in pipe profile versus temperature.
FAU - Zhang, Yuchen
AU  - Zhang Y
AUID- ORCID: 0000-0002-6808-6731
AD  - Key Laboratory of Ministry of Education for Geomechanics and Embankment 
      Engineering, Hohai University, Nanjing 210024, China.
FAU - Shi, Jianyong
AU  - Shi J
AD  - Key Laboratory of Ministry of Education for Geomechanics and Embankment 
      Engineering, Hohai University, Nanjing 210024, China.
FAU - Liu, Zhanlei
AU  - Liu Z
AD  - Key Laboratory of Ministry of Education for Geomechanics and Embankment 
      Engineering, Hohai University, Nanjing 210024, China.
FAU - Sun, Zhenming
AU  - Sun Z
AD  - Key Laboratory of Ministry of Education for Geomechanics and Embankment 
      Engineering, Hohai University, Nanjing 210024, China.
FAU - Wu, Xun
AU  - Wu X
AD  - Key Laboratory of Ministry of Education for Geomechanics and Embankment 
      Engineering, Hohai University, Nanjing 210024, China.
AD  - College of Mechanics and Materials, Hohai University, Nanjing 210024, China.
LA  - eng
GR  - 41877222/National Natural Science Foundation of China/
PT  - Journal Article
DEP - 20220909
PL  - Switzerland
TA  - Polymers (Basel)
JT  - Polymers
JID - 101545357
PMC - PMC9502708
OTO - NOTNLM
OT  - deformation characteristics
OT  - elevated temperature
OT  - high-density polyethylene pipe
OT  - landfill
OT  - pipe profile
OT  - strain
COIS- The authors declare no conflict of interest.
EDAT- 2022/09/24 06:00
MHDA- 2022/09/24 06:01
PMCR- 2022/09/09
CRDT- 2022/09/23 01:44
PHST- 2022/06/20 00:00 [received]
PHST- 2022/09/04 00:00 [revised]
PHST- 2022/09/07 00:00 [accepted]
PHST- 2022/09/23 01:44 [entrez]
PHST- 2022/09/24 06:00 [pubmed]
PHST- 2022/09/24 06:01 [medline]
PHST- 2022/09/09 00:00 [pmc-release]
AID - polym14183779 [pii]
AID - polymers-14-03779 [pii]
AID - 10.3390/polym14183779 [doi]
PST - epublish
SO  - Polymers (Basel). 2022 Sep 9;14(18):3779. doi: 10.3390/polym14183779.