âComputational Civil Engineering - "Intersections" International Journal

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“Computational Civil Engineering 2005”, International Symposium 215- zone 3 = the selection and decisional module.Each of these zones covers a well-defined functional domain within the database,has its own logic segment, completed with the one of the related zones. For alevelling point a large variety of elements may be stored, however the larger theirnumber, the more difficult and costly to create the database.Based on the statistical studies created in order to solve this problem, it was foundthat the data and elements to be introduced in the database and information basewill be structured as follows: positioning data of the point; description data of thepoint; data, elements and information on the content; execution data; miscellaneousdata.• Positioning of the point can be made within the levelling polygons, based on thetopographic description of the point in question.• The description data refer to: the name of the point, in some cases the briefdescription of the location and its topographic description.• The data, elements and information on the content refer to the data andinformation set the levelling database and information base is created for. Thefollowing fall in this category: data referring to the altimetric position of thepoint (the levelling reference system, the z level of the point, the precision oflevel determination, the altitude difference ∆H measured to the next point) anddata on the gravimetric position of the point.• The data concerning the execution, i.e. the contractor, the method and year ofexecution, are recorded on basis of an existing code that can be accessed via thelevelling database and information base.• The miscellaneous data provide security for the database in terms of integrity andfor the situations that appeared and are unforeseen at the date of planning.5. CONCLUSIONSThe modernisation of the Romanian levelling network of grade 1, using highaccuracygeometrical levelling, played a decisive role in its integration into theEastern-European U.P.L.N. (E.V.N.S.). levelling network. The phase of adjustmentand creation of the level registers, made on the basis of the land measurementscompleted in 1988, was accomplished restricted to the benchmarks with levels inthe Baltic Sea system, as a result of the international adjustment of the network(E.V.N.S.).The database separately created on two levels, namely: state-owned networks andlevelled detail points, provide full high-accuracy topographic information on thestudied points.
216 C. NutiuThe results of this modernisation allowed Romania’s participation (with fivepoints) in the project of creating a European E.U.V.N. levelling network, byunifying the Western-European U.E.L.N. network and the Eastern-EuropeanU.P.L.N. (E.V.N.S.) network.References1. Ghitau, D., Geodezie şi gravimetrie geodezică, Editura Didactică şi Pedagogică, Bucureşti, 1983.2. *** GPS Tehnology Applications - International Symposium Volume, Bucharest, 1995.3. *** Revista de Geodezie, Cartografie şi Cadastru, Bucureşti, 1999.4. Grecea, C., Tehnologii topografice utilizând Sistemul Global de Poziţionare GPS pentru reţele desprijin cadastrale - Teza de doctorat, Bucureşti, 1999.5. Colectiv Facultate Geodezie Bucureşti, Măsurători terestre – Fundamente, Editura Matrix,Bucureşti, 2001.6. Moldoveanu, C., Geodezie, Editura Matrix, Bucureşti, 2002.
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A viscoelastic-plastic prediction o
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