RES 89347 - Laserfiche WebLink

shallower explorations along the mainline auxiliary lanes. The borings will be logged and sampled in accordance with standard procedures. The samples will be analyzed and tested using standard laboratory methods and tests. The resultina data will then be analyzed by geotechnical en- gineers to determine acceptability of foundations for the bridge widening and adjacent embankments. The CONSULTANT shall modify the preliminary Materials Reports to include the data, analysis, and recommendations resulting from the supplemental work. Task 1.2--Liquefaction Investigation The CONSULTANT shall perform the additional field explora- tion, laboratory testing, and engineering analysis at the site of the existing TassaJara Creek bridges. This investigation will supplement the data provided under Task 1-1. The purpose of this work will be 1. Verify the loose, saturated, fine-grained cohesionless soils encountered by Caltrans in their 1963 investigations. 2. Perform additional borings and site reconnaissance to further define the liquefaction potential of the sub- surface conditions at the site. Task 1.3--Wick Drain Investigation The CONSULTANT shall perform additional field explorations, laboratory testing, and engineering analysis at the site of the proposed Hacienda Drive Interchange. The purpose of the additional work will be 1. Respond to Caltrans comments on the preliminary Mate- rials Report regarding the applicability of wick drains for acceleration of settlement at the site. 2. Refine the compressibility and consolidation char- ac=eristics of the subsurface soils at the site. This information will then allow refinement of the settle- ment magnitude and the time rate of settlement estimate presented in the preliminary Materials Report. The CONSULTANT shall revise the preliminary Materials Report to include the supplemental data and present conclusions and recommendations. The final report will also address the initial comments made by Caltrans on the preliminary report. 2