Establishing a design procedure for buried steel-reinforced high-density polyethylene pipes : a field study.

Details

• Creators:
  Han, Jie ; Wang, Fei ; Khatri, Deep Kumar ; Parsons, Robert L.
• Corporate Creators:
  University of Kansas. Dept. of Civil, Environmental and Architectural Engineering
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • Pipe
  • Ethylenes
  • Reinforcing steel
  • Field tests
  • Laboratory tests
  • Design methods
  • Strain (Mechanics)
  • Static loads
  • Reinforcement (Engineering)
  • Earth pressure
• Publication/ Report Number:
  K-TRAN: KU-14-4
• Resource Type:
  Tech Report
• Geographical Coverage:
  Kansas
• Corporate Publisher:
  Kansas. Dept. of Transportation. Bureau of Research
• Abstract:
  Two field tests were conducted to investigate the field performance of steel-reinforced high-density polyethylene ; (SRHDPE) pipes during installation and under traffic loading. One test site was located on E 1000 road in Lawrence, KS, which is ; close to Clinton Lake. Three SRHDPE pipes with a diameter of 3 ft and a length of 24 ft were buried in a 6 ft wide trench with 2 ft ; thick soil cover. This test site had two test sections: one section was filled with Aggregate Base Class 3 aggregate (AB3) and the ; second section was filled with crushed stone. The second field study was conducted at a Kansas Department of Transportation ; (KDOT) storage yard in Kansas City, KS. Four 6 ft long SRHDPE pipes with a diameter of 2 ft were connected and buried in a ; trench with a dimension of 4.6 ft wide × 27.5 ft long × 4.2 ft deep. Two types of backfill material were also used in the trench, ; namely, AB3 aggregate and crushed stone. Earth pressures, pipe deflections, and pipe strains on plastic valley, plastic cover, and ; steel ribs were monitored during pipe installation and under static loading on both test sites. The test results from the pipe ; installation and static loading showed that (1) the vertical arching factor (VAF) on the top of the pipe was approximately 1.1 and ; the lateral earth pressure coefficient was approximately 0.65; (2) the peaking deflection was observed in both field tests in a range ; of 0.25 to 1.80% (the peaking deflection in the AB3 section was greater than that in the crushed stone section); (3) the maximum ; strain of the pipe occurred on the plastic valley in the longitudinal direction at the pipe crown, which was in a range of 0.4-0.6% ; and much lower than the strain limit of 5% suggested by the American Association of State Highway and Transportation Officials ; (AASHTO, 2012); and (4) the Giroud and Han (2004) method and the AASHTO (2012) method could reasonably estimate the ; earth pressure on the pipe under static loading, while the Iowa Formula could estimate the pipe deflection during installation and ; caused by static loading. ; The earth pressures, the pipe deflections, and the strains of the pipes in the Lawrence site were monitored for 680 days ; and all increased with time. Two empirical correlations were proposed to calculate the VAF and the pipe stiffness factor at a given ; time. ; The AASHTO (2012) design methods for metal pipes and high-density polyethylene (HDPE) pipes were modified for ; SRHDPE pipes based on the laboratory and field test results. A design procedure for SRHDPE pipes is proposed and illustrated by ; a design example.
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• Format:
  PDF
• Funding:
  C1969
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/29600/dot_29600_DS1.pdf
• File Type:
  [PDF - 3.33 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:64901db9b72e720430e60ef2711eba87e9cbfe8962081a7b163cfb38fa508eff