AUTOMATIC DATA ACQUISITION SYSTEM AT SANTEETLAH DAM

摘要

The Santeetlah Development is one of four dams which comprise the Tapoco Projectowned and operated by Alcoa Power Generating Inc. (APGI). The SanteetlahDevelopment was originally constructed during the period 1926-1928 with modificationsthroughout its operating history. The project consists of an integral intake section, anarch section spanning between the massive left and right thrust blocks, and left and rightwing wall non-overflow gravity sections.The dam is continuously monitored by an Automatic Data Acquisition System (ADAS)for the purpose of evaluating dam performance and safety, in light of the age of thestructures and observed alkali aggregate reactivity (AAR) growth at the dam. Thepresent instrumentation program for the Santeetlah Development consists of horizontaland vertical survey points, inclinometers, multi position mechanical extensometers,vibrating wire piezometers, seepage monitoring locations, one dimensional and threedimensional crackmeters, and reservoir and tailwater level monitoring devices.Since construction of the dam, the instrumentation program has evolved to meet thedemands of maintenance and monitoring projects at the site. This includesinstrumentation installed to quantify the reduction of stresses in the dam during majorslot cutting activities, and routine upgrades to the instruments and control systems tomatch changing technologies.The paper will discuss the ADAS system, and improvements to the system to allow forfuture upgrades to the monitoring program as well as its use to evaluate the performanceof the existing dam structures.