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PILE BEARING IN BURLINGTON LIMESTONE.
| 题名： | PILE BEARING IN BURLINGTON LIMESTONE. |
| 作者： | Gunnink-B; Kiehne-C; Brink-M (Editor) |
| 关键词： | BEARING-CAPACITY; DRILLED-SHAFTS; END-BEARING-PILES; LIMESTONE-; LOAD-TESTS; PILE-FOUNDATIONS |
| 摘要： | Three field load tests of drilled shafts socketed in Burlington limestone were conducted using the Osterberg load cell. The objective of these tests was to compare the shaft capacities obtained from the field load tests with capacities predicted using analytical methods and with typical presumptive design capacities. It was believed that the actual capacities of the drilled shafts would be considerably greater than the capacities predicted from presumptive bearing capacity values. Based on the results of this testing, the following conclusions were drawn. Observed values of side resistance are comparable to the predicted values obtained from empirical relationships. Observed values of end bearing pressure greatly exceed the presumptive values of allowable bearing capacity commonly used for the design of shafts bearing on Burlington limestone. The test shafts were not failed in end bearing and it is believed that the ultimate end bearing pressures would significantly exceed the observed end bearing pressures. The actual factors of safety of shafts in Burlington limestone that are designed for end bearing only, using typical presumptive end bearing capacities, will exceed 6. Side resistance will carry a large portion of the load, and for service loads the entire load may be carried by side friction. |
| 总页数： | Conference Title: Crossroads 2000. Location: Ames, Iowa. Sponsored by: Iowa State University and Iowa Department of Transportation. Held: 19980819-19980820. 1998. pp145-148 (3 Fig., 6 Ref.) |
| 报告类型： | 科技报告 |
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