Foundation Prep and Treatment 1991 Fnd Report.pdf

This document is Appendix E from a 1991 SRS Foundation Report, detailing embankment foundation preparation and treatment during the initial construction of a dam structure completed in 1987. The report focuses on foundation preparation for the right abutment, valley, and left abutment areas, describing the technical processes of cleaning, excavating, and preparing the foundation rock for dam construction.

Key technical details include thoroughly cleaning bedrock in sections, removing debris and loose rock using backhoes, hand tools, compressed air, and pressurized water, and applying techniques like shotcrete and consolidation grouting to create a smooth surface for the impervious core. The documentation includes specific elevation references (e.g., between Els. 830 and 860) and describes challenges such as highly fractured and diced rock, which required specialized treatment. Photographs document the step-by-step foundation modification process, showing rock scaling, trimshot techniques, contact clay blanket placement, and the use of heavy machinery in preparing the dam's foundation areas.