CONTROLE DA ESTABILIDADE DAS RRNN (PADRAO IBGE) UTILIZANDO NIVELAMENTO GEOMÉTRICO
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Abstract
Based on a first order spirit leveling, the Geodetic Instrumentation Laboratory (LAIG) has been studying the behavior of bench marks stability in a scientific network place at UFPR during the second semester of 1995. This study is justified due to the present high precision requirements offundamental leveling networks. The experimental network of UFPR comprehends a 7.3 kmline located at different conditions (strong and sofi drops with different length of the lines). It includes a bench mark linked to IBGE fundamental network, with know height and three different kinds of bench marks; a) eight with IBGE pattern for altimetric points of high precision; b) eight with modified pattern, which is based on IBGE, but including an iron structure into the body of the mark and with a larger area of foundation, constructed at the beginning of the project; c) eight experimental bench marks with less stability, usually used in secondary networks.
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