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Sanacija terestrične mikro-mreže na jezu Markovci : diplomska naloga
Možina, Jan (Author), Savšek, Simona (Mentor) More about this mentor... This link opens in a new window, Ambrožič, Tomaž (Co-mentor), Zavodnik Lamovšek, Alma (Thesis defence commission member), Kogoj, Dušan (Thesis defence commission member)

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Abstract
Dravske elektrarne Maribor želijo energetsko in ekonomsko izkoristiti preliv odvečne vode preko zapornic na jezu Markovci in zagotoviti ekološko sprejemljiv pretok v strugi reke Drave. Posledica tega je izgradnja nove male hidroelektrarne, ki bo izkoriščala ta pretok. Izgradnja male hidroelektrarne Markovci v geodetskem smislu pomeni spremembo geometrije mreže zaradi porušitve enega opazovalnega stebra, zaradi česar ni več možno kontinuirano spremljanje stabilnosti jezovne pregrade. V diplomski nalogi smo z vzpostavitvijo novega referenčnega stebra sanirali obstoječo terestrično mikro-mrežo Markovci in tako vzpostavili optimalno geometrijo mreže, s čimer ponovno zagotovimo pogoje za spremljanje stabilnosti jezu. Optimalen položaj novega referenčnega stebra smo določili na osnovi simulacij opazovanj. Simulacije smo opravili za dva niza natančnosti, za precizno in običajno natančnost, v treh serijah, in sicer za mrežo, ki vsebuje referenčno točko O6 za mrežo, ki ne vsebuje odstranjene referenčne točke O6 ter za mrežo, ki vsebuje novo referenčno točko O6N. Vsa simulirana opazovanja smo nato izravnali za namen analize položajne natančnosti referenčnih in kontrolnih točk. Simulirana opazovanja smo primerjali tudi z dejanskimi meritvami in poiskali vzroke za razlike med njimi. V nalogi smo predstavili tudi obstoječo stabilizacijo referenčnih in kontrolnih točk ter predlagali način stabilizacije nove referenčne točke. Podali smo tudi smernice za kakovostna geotehnična opazovanja, ki so nam v pomoč za korektno izvajanje terenskih meritev. Korektno izvedene meritve pa predstavljajo osnovo za kakovostne rezultate.

Language:Slovenian
Keywords:geodezija, diplomska dela, UNI, GIG, mikro-mreža, simulacija opazovanj, položajna natančnost, precizna natančnost, običajna natančnost, izravnava opazovanj, elipsa pogreškov, opazovalni steber
Work type:Bachelor thesis/paper (mb11)
Tipology:2.11 - Undergraduate Thesis
Organization:FGG - Faculty of Civil and Geodetic Engineering
Year:2012
Publisher:[J. Možina]
Number of pages:X, 40 str., 6 pril.
Place:Ljubljana
UDC:528.3:627.43(497.12Markovci)(043.2)
COBISS.SI-ID:5998945 Link is opened in a new window
Views:2517
Downloads:337
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Secondary language

Language:English
Title:Reconstruction of the terrestrial micro-network at Markovci dam
Abstract:
The company Dravske elektrarne Maribor intends to make an energy efficient and cost-effective use of the spillway water at Markovci dam, as well as to provide for an ecologically acceptable flow in the Drava river bed. This entails the construction of a new small-scale hydro that would make use of this flow. From the geodetic point of view, the construction of a small-scale hydro Markovci would require changes in the geometric network since one of the observation posts would be eliminated, thus preventing any further continuous monitoring of the stability of dam sluices. The thesis presents the reconstruction of the existing terrestrial micro-network Markovci, which includes the installation of a new reference post in order to allow for the establishment of a new optimum geometric network and thus re-establish conditions for monitoring the dam stability. The optimum position of the new reference post has been determined following a series of simulated observations. Simulations were carried out using two types of accuracy, precision and standard, in three series, namely for the network that included the eliminated reference point O6, the network without the eliminated reference point O6 and the network that included a new reference point O6N. All simulated observations have been then adjusted in order to analyze the positional accuracy of the reference and control points. The simulated observations are compared to the actual measurements and reasons for the observed differences are discussed. The thesis also discusses the existing stabilization of reference and control points and suggests the method to be used for the stabilization of the new reference point. Guidelines for high-quality geo-technical observations are also proposed in order to enable proper field measurements. Properly conducted measurements are essential for obtaining high-quality results.

Keywords:graduation thesis, geodesy, micro-network, simulated observations, positional accuracy, precision accuracy, standard accuracy, offset observations, error ellipse, observation post

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