Pengamatan GPS untuk Monitoring Deformasi Bendungan Undip

摘要

Dam is one multifunctional tools which has an important role in human life. If a building is under pressure, it will change the dimensions of shape. As well as the dam, if the construction of it gets pressure from the dam lake water loading effect, as the result, the dam construction will be throug deformation. Therefore it is necessary for the maintenance and tendance by conducting periodic deformation monitoring.The research method is using differential positioning method with GPS dual frequency at nine points of monitoring which located at the main dam. The deformation characteristic which are examined are the amount of the displacement value and the displacement speed per year. The technique of analyzing data in this research is using Scientific Software GAMIT 10.5. This research takes on three times period starts from March, April, and finishing May 2015.The mean result that occurs on the X axis = 0.726 ± 0,362 mm, Y axis = 0.561 ± 0,364 mm and Z axis = 1,471 ± 0,657 mm and the average value of the speed observation point per year on the X axis = 4,006 ± 2,133 mm/year, the Y axis = 2,971 ± 1,502 mm/year and the Z axis = 7.961 ± 3,602 mm/year.