2009-192A - Laserfiche WebLink

Home Browse Search

A . M . ENGINEERING AND TESTING , INC. Geotechnical Exploration Indian River County Parks Maintenance Complex, IRC Project No. 0710 A. M. Engineering Project No . PSL1825 - I SUITABILITY OF FILL FROM PROPOSED STORMWATER MANAGEMENT POND In general, the soils designated on the boring logs as "fine sand" or "fine sand, trace silt" dry rapidly and compact easily, even under wet conditions. These soils perform well for building foundations or roadway fill . The soils designated "fine sand, little silt" may need some drying time, but are suitable as fill for buildings and roadways . PAVEMENT CONSIDERATIONS The soil conditions at the auger boring locations are adequate for a pavement section using standard local materials . The pavement area should be prepared in accordance with the "Site Preparation Recommendations" section of this report. We recommend that the proposed pavement grades provide at least 18 inches of separation between the bottom of the base course and the average wet season high water table. f The pavement section should be designed for the anticipated vehicle loads and frequencies. The stabilized subgrade should have a mirumum LBR value of 40, and should be compacted to at least 98 percent of the modified Proctor maximum dry density (AASHTO T- 180) . The base course should be FDOT approved limerock, crushed concrete or coquina, with a minimum LBR value of 100 . The base course should be placed in lifts not to exceed six inches, and compacted to at least 98 percent of the modified Proctor maximum dry density (AASHTO T- 180) . The surface course should be FDOT Type S - 1 or S -3 asphaltic concrete, and should be compacted to at least 95 percent of the maximum laboratory Marshall density . ADDITIONAL EXPLORATIONS Additional explorations should be completed in the areas that were previously inaccessible, specifically the southwest comer of the office building and the paved areas to the west of the building, to verify the uniformity of the subsurface conditions below the proposed construction . } CLOSURE This report is for the exclusive use of the Indian River County Public Works, Engineering Division and the designers of the previously described project, and may only be applied to this specific project. The right to rely on this report may not be assigned without written permission of A. M. Engineering and Testing, Inc. This report has been prepared in accordance with generally accepted geotechnical engineering practices in the State of Florida . No other warranty, expressed or implied, is made . We do not guarantee performance in any respect, only that our work meets normal standards of professional care. Our recommendations are based on the project information furnished to us , the results of our field explorations and our past experience. They do not reflect variations in subsurface conditions that may exist between our borings and in unexplored areas of the site. The nature and 7