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LABORATORY INVESTIGATION ON THE USE OF HIGH MOISTURE CONTENT SOILS IN HIGH FILLS
Yongchun Huang, Frank D Shepard
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Abstract
A LABORATORY INVESTIGATION ON THE USE OF HIGH MOISTURE CONTENT SOILS IN HIGH FILLS IS DESCRIBED. THE PURPOSES WERE TO INVESTIGATE (1) THE EFFECT OF THIXOTROPY, INITIAL MOISTURE CONTENT AND DENSITY, AND CONSOLIDATION ON THE SHEAR STRENGTH OF CLAY-LIKE SOILS WITH MOISTURE CONTENTS UP TO 8 PERCENTAGE POINTS ABOVE OPTIMUM, (2) THE EFFECT OF INITIAL MOISTURE CONTENT AND DENSITY ON THE CONSOLIDATION CHARACTERISTICS OF THESE SOILS, AND (3) THE POSSIBILITY OF USING THESE SOILS IN HIGH FILLS AND THE MANNER IN WHICH THEY SHOULD BE USED. TWO SOILS - A DUNMORE SILT LOAM AND A CLARKESVILLE CLAY LOAM - WERE INVESTIGATED. SOIL SPECIMENS WERE FABRICATED BY STATIC COMPACTION AND LATER INVESTIGATED FOR SHEAR STRENGTH BY THE DIRECT SHEAR TEST AND FOR CONSOLIDATION CHARACTERISTICS BY THE CONVENTIONAL CONSOLIDATION TEST. THE RESULTS SHOW THAT, WHEN A SOIL IS CONSOLIDATED UNDER HIGH PRESSURES, THE INITIAL MOISTURE CONTENT AND DENSITY HAVE LITTLE EFFECT ON THE FINAL SHEAR STRENGTH. THIS LEADS TO THE CONCLUSION THAT HIGH MOISTURE CONTENT SOILS CAN BE USED IF THEY ARE PLACED IN THE LOWER PART OF A HIGH FILL AND IF SUFFICIENT TIME IS ALLOWED FOR THEM TO CONSOLIDATE. A PROCEDURE FOR USING THESE SOILS IN HIGH FILLS IS ALSO SUGGESTED. /AUTHOR/