Performance of High Capacity Caissons Founded on Decomposed Rock

by D. C. Koutsoftas, Dames & Moore, United States,
L. C. Reese, Dames & Moore, United States,

Document Type: Proceeding Paper

Part of: Foundation Engineering: Current Principles and Practices


The results of six load tests on large diameter caissons founded on decomposed rock are presented and analyzed. The caissons ranged from 1.5 m to 2.5 m in diameter and were 20 m to 23 m long. Three of the load tested caissons were founded on decomposed mica schist, while the other three were founded on decomposed granite at a different site. Detailed analyses of the results of the load tests form the basis for estimating design parameters, including skin friction and end-bearing characteristics.

Subject Headings: Caissons | Load bearing capacity | Load tests | Rocks | Load factors | Soil analysis | Soil properties | Pile tests

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