Pullout load capacity of a circular earth anchor buried in sand

Pullout load capacity of a circular earth anchor buried in sand

THE RESULTS OF PULLOUT LOAD CAPACITY TESTS PERFORMED ON NUMEROUS SMALL-SCALE MODEL EARTH ANCHORS ARE PRESENTED. THE TECHNIQUES OF DIMENSIONAL ANALYSIS ARE USED TO DEVELOP EMPIRICAL RELATIONSHIPS AMONG ANCHOR SIZE, DEPTH OF ANCHOR EMBEDMENT, AND PULLOUT CAPACITY FOR SINGLE ANCHORS OF CIRCULAR CROSS-SECTION BURIED IN A DENSE UNIFORM SAND. A DISTINCTION IS MADE BETWEEN SHALLOW AND DEEP ANCHORS. THE RANGE OF THE RATIO OF DEPTH OF EMBEDMENT TO ANCHOR DIAMETER STUDIED CORRESPONDS TO THE GENERAL RANGE FOUND IN FIELD APPLICATIONS OF EARTH ANCHORS THAT ARE USED TO PROVIDE TIE- BACK RESISTANCE FOR RETAINING STRUCTURES AND UPLIFT RESISTANCE FOR TRANSMISSION TOWERS, UTILITY POLES, MOORINGS, ETC. THE RESULTS OF TWO FULL-SCALE FIELD TESTS OF WEBB-LIPOW TYPE ANCHORS ARE ALSO REPORTED. 

Dimensional analysis, formaliz ed by Buckingham (11) in his well-known 11-theorem, has been used by numerous resear.che rs to determine the functional relationships between the primary physical constants involved in physical phenomena. fu this respect, dimensional analysis is often helpful in providing a simple basis for the possible correlation of the results of small-scale model tests with the behavior of full-scale prototypes. According to the 'IT-theorem, a physical phenomenon which is a function of n physical quantities involving m fundamentai units can be describecl in Lite following functional form: F(111, 7T2, ••• , 7T ) = 0 n - m (1) where the 11-terms are the (n - m) independent dimensionless products of the n physical quantities (6). The primary physical quantities for the pullout capacity of a flat anchor buried in sand are listed in Table 1 using the force, length, and time system of fundamental units.