The transport infrastructure development in big cities leads to design underground road passages ... more The transport infrastructure development in big cities leads to design underground road passages for fluidity of traffic. Under these conditions it is necessary to divert the underground utilities routes. Also, the construction of new metro sections is an alternative to public transport from the surface. New modern office and residential buildings, as well as new commercial complexes, require new underground utility projects. In these circumstances, design studies require investigations about underground utility networks, in order to avoid the damage in execution operations of new construction foundations works. These investigations allow the design of metro lines and metro station avoiding major waterways, sewers, gas or electric cables, or design first the deviation project for these underground utility networks. Georadar systems together with advanced positioning surveying, assisted by specialized software, allow fast mapping, nondestructive and precise, very useful to designers for types of construction mentioned above. This system becomes a necessity in terms of urban agglomerations in growing today [6]. This article refers to modern systems Ground Penetrating Radar (GPR), to software for taking over of field information and to postprocessing software that lead to obtaining 3D georeferenced digital map products, integrated into a GIS [1].
Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Horticulture, 2015
The monitoring of the behaviour of spatial structure of a building is a systematic activity of co... more The monitoring of the behaviour of spatial structure of a building is a systematic activity of collecting and capitalizing of information derived from observation and measurements of some phenomena and sizes that characterizes the structure in the process of interaction with the environment and technological developments. Verifications by calculating the amount "stress values" in the characteristic sections of the building are confronted with the results of tests on models or test sections. These are-currently-followed by observations made by means of measures installed both in the body of the building and outside it. Hypothesis verification models are supplied by statistical tests. On the measurements compensation there are formulated several hypotheses. To validate or not the results obtained after compensation is necessary to verify such assumptions. To detect possible deformations (displacements) occurring between two networks, observed at different times, the analysis should be performed only on the remaining common (identical) points in the interval T i and T i + 1. In principle, comparing the coordinates (i.e. altitudes / heights) of the network points determined at different stages and investigate whether they form or not congruent figures. The difference between the determined parameters for network points should be within the "safety margin". The safety margin is calculated according to the empirical standard deviation. If this does not fall within safe limits, the statistic test does not indicate anything other than that deformations have appeared in the network.
At this time, when marine and river navigation intensifies, it is necessary detailed knowledge of... more At this time, when marine and river navigation intensifies, it is necessary detailed knowledge of the water bottom topography of the river navigable channel and marine coastal areas. Sonar sounding systems, multibeam ecosounders systems or those using interferometry, is investigating ways water bottom topography, to identify sedimentary deposits or to achieve the necessary studies hydrotechnical constructions. The importance of bathymetric measurements is noted in several projects implemented in Romania, presented in this paper. Keywords—bandwidth, beamwidth, depth, echosounder, seafloor, signal, SAS interferometry, Danube Delta
The transport infrastructure development in big cities leads to design underground road passages ... more The transport infrastructure development in big cities leads to design underground road passages for fluidity of traffic. Under these conditions it is necessary to divert the underground utilities routes. Also, the construction of new metro sections is an alternative to public transport from the surface. New modern office and residential buildings, as well as new commercial complexes, require new underground utility projects. In these circumstances, design studies require investigations about underground utility networks, in order to avoid the damage in execution operations of new construction foundations works. These investigations allow the design of metro lines and metro station avoiding major waterways, sewers, gas or electric cables, or design first the deviation project for these underground utility networks. Georadar systems together with advanced positioning surveying, assisted by specialized software, allow fast mapping, nondestructive and precise, very useful to designers for types of construction mentioned above. This system becomes a necessity in terms of urban agglomerations in growing today [6]. This article refers to modern systems Ground Penetrating Radar (GPR), to software for taking over of field information and to postprocessing software that lead to obtaining 3D georeferenced digital map products, integrated into a GIS [1].
Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Horticulture, 2015
The monitoring of the behaviour of spatial structure of a building is a systematic activity of co... more The monitoring of the behaviour of spatial structure of a building is a systematic activity of collecting and capitalizing of information derived from observation and measurements of some phenomena and sizes that characterizes the structure in the process of interaction with the environment and technological developments. Verifications by calculating the amount "stress values" in the characteristic sections of the building are confronted with the results of tests on models or test sections. These are-currently-followed by observations made by means of measures installed both in the body of the building and outside it. Hypothesis verification models are supplied by statistical tests. On the measurements compensation there are formulated several hypotheses. To validate or not the results obtained after compensation is necessary to verify such assumptions. To detect possible deformations (displacements) occurring between two networks, observed at different times, the analysis should be performed only on the remaining common (identical) points in the interval T i and T i + 1. In principle, comparing the coordinates (i.e. altitudes / heights) of the network points determined at different stages and investigate whether they form or not congruent figures. The difference between the determined parameters for network points should be within the "safety margin". The safety margin is calculated according to the empirical standard deviation. If this does not fall within safe limits, the statistic test does not indicate anything other than that deformations have appeared in the network.
At this time, when marine and river navigation intensifies, it is necessary detailed knowledge of... more At this time, when marine and river navigation intensifies, it is necessary detailed knowledge of the water bottom topography of the river navigable channel and marine coastal areas. Sonar sounding systems, multibeam ecosounders systems or those using interferometry, is investigating ways water bottom topography, to identify sedimentary deposits or to achieve the necessary studies hydrotechnical constructions. The importance of bathymetric measurements is noted in several projects implemented in Romania, presented in this paper. Keywords—bandwidth, beamwidth, depth, echosounder, seafloor, signal, SAS interferometry, Danube Delta
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