RPM Pipe Deflections on Yuma Project Field Test. Analysis of 30-Inch-Diameter Reinforced Plastic Mortar Pipe Behavior under 4Feet of Backfill with Various Bedding Conditions,

摘要

Field tests of reinforced plastic mortar (RPM) pipe were conducted on the Yuma Project. Two test sections of 30-inch-diameter pipe were installed to replace two deteriorated open laterals. Twenty-nine 20-foot sections were placed in the Toronto Lateral in a dry trench using the following types of bedding: (1) compacted natural earth, (2) compacted sand, (3) puddled natural earth, (4) loose sand,and (5) loose natural earth. Thirty 20-foot sections were placed in the Apache Lateral in a wet and unstable subgrade 9to 18inches below the water table. Performance of RPM pipe was evaluated under controlled field conditions and deflections of the pipe laid in different bedding conditions were measured. (Modified author abstract)