Accession Number : ADA134343
Title : Analytical and Experimental Investigation of Soil Reinforcing.
Descriptive Note : Final rept. 1 Jan 81-30 Jun 82 on Phase 1,
Corporate Author : PURDUE UNIV LAFAYETTE IN SCHOOL OF CIVIL ENGINEERING
Personal Author(s) : Holtz,R D ; Harr,M E
PDF Url : ADA134343
Report Date : Oct 1983
Pagination or Media Count : 142
Abstract : Significant improvements in the capacity and service life of reinforced earth structures require an improved understanding of the fundamental behavior of these systems. Both experimental and analytical investigations were carried out to develop models for the interaction of geotextile-type reinforcement and granular soils. Reinforcement configurations and systems investigated were thought to be applicable to alternate launch and recovery surfaces (ALRS). Model ALRS systems using geotextiles and geogrids as reinforcement were tested in the laboratory in a variety of configurations. These were loaded to failure, quasi-statically, by both plane strain and axisymmetric rigid plates. Load-deformation characteristics as well as the shape of the deflected basin are reported. Significant increases in bearing capacity and modulus of subgrade reaction as a function of depth and number of layers of reinforcement were observed. However, there was a decrease in improvement as the depth to the first layer increased. Edge fixity conditions were found to be relatively unimportant, and the benefit of multiple-reinforcement layers was greater if the depth and spacing were small compared to the diameter of the loaded area. Surprisingly, little difference was observed in the response of the geogrids and geotextiles, probably because sand was used in the experiments. Geometric scaling of bearing capacity, based on the diameters of the loaded areas, was not possible.
Descriptors : *Soils, *Textiles, *Reinforcing materials, Roads, Walls, Structures, Interactions, Loads(Forces), Bearing strength, Test methods, Mathematical prediction
Subject Categories : Soil Mechanics
Structural Engineering and Building Technology
Distribution Statement : APPROVED FOR PUBLIC RELEASE