Accession Number : AD0708534

Title :   VIBRATORY PILE DRIVING AND ULTIMATE PENETRATION.

Descriptive Note : Scientific rept. no. 1 (Final),

Corporate Author : PRINCETON UNIV N J DEPT OF CIVIL AND GEOLOGICAL ENGINEERING

Personal Author(s) : Schmid,Werner E. ; Gharahamani,Arsalan

Report Date : JUN 1968

Pagination or Media Count : 145

Abstract : This study is a continuation of vibratory pile driving research at Princeton University Soil Engineering Laboratory with twin goals of optimization of the driving procedure and correlation of the driving records with the bearing capacity of piles. Deformable body vibration of the pile is studied and computerized for a linear soil model. The results indicate that the wave resonance frequencies of piles do not very appreciably due to embeddment. The shape of the dynamic soil resistance is better predicted by the computerized response of the modified nonlinear soil model used for impact studies. This response is calculated by putting the results of the static surcharge load transfer as the initial conditions and assuming that the applied force is constant during small time intervals. Model experiments are carried ot for closed- as well as open-end piles excited by a sinusoidal force produced by an electromagnetic vibratory in the 'rigid body' range of frequency by the application of a unidirectional surcharge. At the impact threshold value of the sinusoidal force phase instability occurs and full impact happens between the pile and the soil with a time duration which appears to be a soil parameter. (Author)

Descriptors :   (*FOUNDATIONS(STRUCTURES), POSITIONING DEVICES(MACHINERY)), (*SOIL MECHANICS, VIBRATION), SAND, IMPACT SHOCK, DEFORMATION, LOADS(FORCES), LOAD DISTRIBUTION, RESPONSE, MATHEMATICAL MODELS, COMPUTER PROGRAMS

Subject Categories : Structural Engineering and Building Technology
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE