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Geotechnical Data Technical Memorandum <br />Hazeltine -Road Runners Rest II Gravel Pit Lining Project <br />December 2000 <br />' The effective consolidation pressures were selected based on the range of effective and total <br />stresses expected to occur in the constructed embankment and foundation materials. Total <br />vertical stress at a given elevation is the total load on the soil including soil, water and structure <br />loads. The effective vertical stress in the soil at a given location is calculated by calculating the <br />total stress and subtracting the unit weight of water times the depth below the water surface or <br />groundwater level. <br />The stress paths from the consolidated undrained triaxial test are shown on Figures 4.1.1 and 4.2.1 <br />' as p-q plots, with p defined as the average principal stress and q as one half the difference <br />between the maximum and minimum principal stresses (the center and radius of Mohr's <br />' respectively).. The p-q stress path is used to obtain a better understanding of the soil behavior <br />during shearing and whether the soil is normally consolidated or overconsolidated. The <br />failure envelope for each material was defined as the maximum stress ratio between the <br />' deviator stress and confining stress. Both the remolded Howe-Haller overburden and <br />remolded claystone materials appear to be overconsolidated at low consolidation pressures, <br />which is expected of remolded samples and compacted fill materials. <br />1 <br />ee_isero m..pa <br />1 <br />4-9 <br />GEI Consul[anrs, Inc. <br />