A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Extrapolation of Pile Capacity from Non-Failed Load Tests
Static pile load test to failure is the ultimate procedure available to examine the capacity and integrity of deep foundations. Being expensive and time-consuming, the procedure is often substituted for the application of a load to a certain factor (most often two) times the contemplated design load. In fact, only a proof test is carried out while the ultimate capacity and actual factor of safety remains unknown. This procedure results in an uneconomic foundation solution, unknown capacity when modifications are required, and the inability of the engineer to gain insight into the controlling mechanism for improved design. The described state of the practice calls for the ability to reliably estimate the ultimate bearing pile capacity for non-failed load tests. A practical analytical method is proposed, capable of extrapolating the measured load-settlement relations beyond the maximum tested load. The proposed procedure, along with two other possible methods, is evaluated. Case history analyses of six load-tested driven piles at two sites are presented. The analyzed cases indicate possible substantial savings when the ultimate capacity well exceeds the maximum applied load. Moreover, the method already demonstrates its enormous importance from aspects of engineering and economics.
Extrapolation of Pile Capacity from Non-Failed Load Tests
Static pile load test to failure is the ultimate procedure available to examine the capacity and integrity of deep foundations. Being expensive and time-consuming, the procedure is often substituted for the application of a load to a certain factor (most often two) times the contemplated design load. In fact, only a proof test is carried out while the ultimate capacity and actual factor of safety remains unknown. This procedure results in an uneconomic foundation solution, unknown capacity when modifications are required, and the inability of the engineer to gain insight into the controlling mechanism for improved design. The described state of the practice calls for the ability to reliably estimate the ultimate bearing pile capacity for non-failed load tests. A practical analytical method is proposed, capable of extrapolating the measured load-settlement relations beyond the maximum tested load. The proposed procedure, along with two other possible methods, is evaluated. Case history analyses of six load-tested driven piles at two sites are presented. The analyzed cases indicate possible substantial savings when the ultimate capacity well exceeds the maximum applied load. Moreover, the method already demonstrates its enormous importance from aspects of engineering and economics.
Extrapolation of Pile Capacity from Non-Failed Load Tests
S. G. Paikowsky (author) / T. A. Tolosko (author)
1999
172 pages
Report
No indication
English
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