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Mechanical Behavior of Large Flexible Pipe Buried in Shallow Cover
This paper presents the results of field tests that were conducted to reveal the mechanical behavior and application of large diameter flexible pipe buried in shallow cover with countermeasures against pipe flotation by the use of geogrids. In the field tests, two lines of 2400mm diameter flexible pipe were installed with 1.5m cover. Pipe behaviors during construction, and mechanical behavior of the pipes and bedding during an incipient flotation event due to raised groundwater levels, are discussed. After one-year of measurements, the results indicate that the deflection of the pipes is less than 1% of their diameter and the force acting on the geogrid is about 10% of the goegrid's ultimate strength. In the field tests, backfill materials wrapped by geogrid had high bearing capacity during construction and were effective in preventing large diameter pipe deflection. This shallow cover method with geogrid demonstrates a large resistance force against pipe uplift with soil cover at 60% of pipe diameter, and a stable performance of the geogrid unified backfill.
Mechanical Behavior of Large Flexible Pipe Buried in Shallow Cover
This paper presents the results of field tests that were conducted to reveal the mechanical behavior and application of large diameter flexible pipe buried in shallow cover with countermeasures against pipe flotation by the use of geogrids. In the field tests, two lines of 2400mm diameter flexible pipe were installed with 1.5m cover. Pipe behaviors during construction, and mechanical behavior of the pipes and bedding during an incipient flotation event due to raised groundwater levels, are discussed. After one-year of measurements, the results indicate that the deflection of the pipes is less than 1% of their diameter and the force acting on the geogrid is about 10% of the goegrid's ultimate strength. In the field tests, backfill materials wrapped by geogrid had high bearing capacity during construction and were effective in preventing large diameter pipe deflection. This shallow cover method with geogrid demonstrates a large resistance force against pipe uplift with soil cover at 60% of pipe diameter, and a stable performance of the geogrid unified backfill.
Mechanical Behavior of Large Flexible Pipe Buried in Shallow Cover
Yoshiyuki, Mohri (author) / Nobuo, Fujita (author) / Satoshi, Suenaga (author)
Pipeline Division Specialty Conference 2001 ; 2001 ; San Diego, California, United States
Pipelines 2001 ; 1-9
2001-07-01
Conference paper
Electronic Resource
English
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