Accession Number : ADA185496

Title :   Measurement of Horizontal and Vertical Swell Pressures from a Triaxial Laboratory Test: A Feasibility Study.

Descriptive Note : Final rept. Oct 85-Sep 87,

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS GEOTECHNICAL LAB

Personal Author(s) : Johnson, Lawrence D

PDF Url : ADA185496

Report Date : Aug 1987

Pagination or Media Count : 89

Abstract : Horizontal and vertical swell pressures in cohesive soil influence the performance of permanent military facilities found on such soils. Horizontal pressures influence skin friction on deep foundations that may lead to uplift and heave of foundations in expansive soil or downdrag and settlement in consolidating of collapsible soil. Excessive horizontal pressures on basement and retaining walls may require uneconomical structural designs. Vertical swell pressures in foundation soils often lead to foundation heave and may cause structural distress. The purpose of this study was to determine the feasibility of evaluating vertical and horizontal swell pressures using a triaxial test apparatus. This work developed a double chamber triaxial apparatus and test procedure to measure vertical and horizontal swell pressures caused by introducing water to a 1.4-in. diam by 3.5-in. high soil specimen subject to no volume change.

Descriptors :   *FEASIBILITY STUDIES, *SOILS, BASEMENTS, COHESION, COLLAPSIBLE STRUCTURES, FOUNDATIONS(STRUCTURES), HEAVING, HORIZONTAL ORIENTATION, MILITARY FACILITIES, OCEAN WAVES, PRESSURE, STRUCTURAL PROPERTIES, TEST METHODS, VERTICAL ORIENTATION, VOLUME, WALLS, WATER

Subject Categories : Geology, Geochemistry and Mineralogy

Distribution Statement : APPROVED FOR PUBLIC RELEASE