EVALUATION OF THE FRICTION ANGLE SOIL-WALL AND THE ROUGHNESS OF THE SURFACE OF CONTACT
Abstract
The friction angle soil-wall is a basic parameter for the design of the retained wall. The common sense uses the value of the friction angle soil-wall equal to a parcel of the internal friction angle of the ground. Experimental values for Brazilian soil are not available in literature. The present paper presents results of tests of direct shear carried through in test bodies of soil in contact with another representative material of retained walls (conventional concrete, concrete with recycled aggregate of construction and demolition waste - CDW, rock and tires), with the objective of getting the friction angles soil-wall. Eighteen roughness surfaces and two Recife´s hillsides soils, one sand clayey (SC) and other clay of low compressibility (CL) have been used. The roughness of the surfaces in contact with the ground had been evaluated. The relation between the ground-wall angle friction and the soil friction angle varies from 3/4 to 1 for the clayey sand and from 1/3 to 1 for the clayey soil, in the function of roughness of contact surface. Keywords: Friction angle soil-wall, retained walls of conventional concrete and concrete with recycled agreggate of construction and demolition waste.Downloads
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Published
2014-02-28
Issue
Section
Civil Engineering