Settlement Characteristics from Insitu Tests in Flyash Structural Fills

by Richard M. Hillis, KIDDE Consultants Inc, United States,
Ramesh C. Gupta, KIDDE Consultants Inc, United States,

Document Type: Proceeding Paper

Part of: Foundation Engineering: Current Principles and Practices


Flyash from the Baltimore Gas and Electric Company's plants was used to construct structural fills in thickness ranging from 5 to 25 feet (1.5m to 7.6m). Several warehouses have been constructed on this fill. Extensive field and laboratory investigations have shown that the flyash structural fills possess adequate load carrying capacity for the anticipated design conditions. Screw plate load tests, dilatometer tests and pressuremeter tests were performed at various depths to determine settlement characteristics of the fill. It was found that the values of the constrained modulus estimated from dilatometer tests compared within a factor of 1.5 with the values obtained from screw plate load tests and one-dimensional consolidation test during the reloading cycle. However, the Menard pressuremeter modulus obtained from pressuremeter tests during loading was close to the value of the 1-D modulus during virgin, compression.

Subject Headings: Load tests | Fills | Fly ash | Field tests | Measuring instruments | Consolidated soils | Soil modulus | Baltimore | Maryland | United States

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