DEVELOPMENT OF DAM RE-ANALYSIS AND MONITORING SYSTEM SOFTWARE (DREAMS)
Dams are massive public utility structures and pose a potential threat to downstream populations and the economy in the event of a structural failure. Field inspections and quantitative measurements with field instrumentation observations not only provide information to geotechnical experts in desig...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/68389 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Dams are massive public utility structures and pose a potential threat to downstream populations and the economy in the event of a structural failure. Field inspections and quantitative measurements with field instrumentation observations not only provide information to geotechnical experts in designing a project to be safe and efficient but also provide instructions to the contractor to carry out the work safely and economically. One of the main purposes of instrumentation installed in earthen dams is to study behavior according to design predictions. To make the dam safety analysis more efficient, an instrumentation monitoring application that can evaluate the behavior and safety of the dam (DREAMS) was created. The evaluation was carried out by analyzing the piezometer instrumentation on the potential for hydraulic fracture, backward internal erosion, changes in permeability and surveillance of dam conditions based on the Draft Risk Analysis Methodology Appendix E (2000), USBR. The pattern of hydraulic fracture and backward internal erosion was determined using numerical modeling using Seep/W with zero pressure boundary conditions at the dam core. Estimated determination of changes in permeability in the nearest zone with piezometer instrumentation, using instrumentation hysteresis data evaluation between piezometer values and reservoir water level elevation. Based on this analysis, the convexity value (analysis with the ellipse equation) will be obtained, the more convex means the smaller the permeability value. The combination of instrumentation and surveillance analysis will be processed into a risk analysis which will be plotted on the F-N chart. Dam safety evaluations carried out using DREAMS can quickly provide information for the benefit of policy makers in determining further action plans.
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