A COMPARISON OF VARIANT SOLUTIONS FOR THE RECONSTRUCTION OF A REGIONAL TOURIST ROAD OPLOTNICA - PESEK - CEZLAK

Rekonstrukcija ceste predstavlja gradbeni poseg, pri katerem gre prvenstveno za zamenjavo vozišča oz. voziščne konstrukcije ceste, hkrati pa se običajno korigirajo tudi projektno-tehnični elementi rekonstruirane ceste. Rekonstrukcija ceste je potrebna torej prvenstveno zaradi deformiranosti vozišča oziroma voziščne konstrukcije, ki nastane zaradi prometnih obremenitev, vpliva vremenskih razmer, lastnosti vgrajenih materialov ter drugih razlogov. Zaradi naštetega se pojavijo vidne poškodbe vozišča kot so, kolesnice, razpoke, posedki, mrežne razpoke, udarne jame ter poškodbe ostalih elementov ceste (bankina, brežina, berma itd.), ki neposredno ali posredno vplivajo na potekanje prometa po obravnavanem odseku ter na prometno varnost. Rekonstrukcije se projektirajo ter izvajajo na plansko dobo 10 let, kar pomeni, da morajo vsi elementi ceste, glede na prirastek prometa v tem obdobju ohraniti lastnosti, ki še omogočajo varno odvijanje prometa. Zaradi vse večjega zmanjševanja proračunskih sredstev, ki so namenjena za cestno infrastrukturo je vedno bolj pomembno, da upravljalec cestne infrastrukture pravilno določi obseg ukrepov, ki se bodo pri določeni rekonstrukciji oziroma novogradnji izvajali in s tem optimizira stroške izvedbe. To lahko izvedemo z študijo vrednotenja variant, kar pa se zaenkrat v področju rekonstrukcij maloprometnih cest praviloma ni uporabljalo. V diplomski nalogi sta predstavljeni dve varianti možne rekonstrukcije regionalne turistične ceste RT-930 Oplotnica – Pesek – Cezlak. Z opravljeno analizo smo poskušali ugotoviti primernejšo izbiro elementov (in dimenzij) ceste v prečnem profilu in utemeljitev le-te. V diplomskem delu sta obe varianti medsebojno primerjani in vrednoteni po izbranih kriterijih. Na podlagi opravljene primerjalne analize je bilo ugotovljeno, da je primernejša rekonstrukcija s širino vozišča 5,0 m (2 x 2,5m), saj upraviči višje stroške izvedbe zaradi večjega števila objektov, glede na večjo prometno varnost, udobnost vožnje ter morebitno povečanje turističnega razvoja tega dela Pohorja in s tem posledično povečanja prometa na tem odseku.When reconstructing the road, a substitution of upper layer is of primary significance, but at the same time the correction of all designed and technical elements of the existent road takes place. Road reconstruction is necessary due to the deformation which occurs as a consequence of the effect of traffic load, weather conditions, characteristics of built materials and the like. Consequently, many visual deformations appear on the road such as cart tracks, cracks, cracks in a shape of a net, potholes and deformations of other parts of the road (embankment, slope, berm, ecc.) which directly or indirectly affect traffic flow as well as road safety on the related road segment. Reconstructions are designed and executed according to traffic prognosis, which means that the road elements should be able to support the increasment of traffic in ten years in order to retain properties that ensure safety of all the members in traffic. Because of the reducing infrastructure spending it seems to be more and more important for the operator of road infrastructure to correctly evaluate the extent of repair necessary which would optimize the costs of reconstructions as well as new constructions. The evaluation can be accomplished with the study of variants which has not been used in reconstruction of roads with less traffic until now. Two possible variants for the reconstruction of the regional tourist road "RT-930 Oplotnica – Pesek – Cezlak “ were presented in the diploma paper. The purpose of the analysis carried out was to ascertain which choice of elements (and dimensions) of road in transverse profile is more appropriate. In the analysis, two roads profile widths have been compared. Following the different criteria, both variants were compared and evaluated in the concluding part. On this basis, we established that there construction with road profile of five metres (5m – 2 x 2.5m) was more suitable, since higher costs of the execution were justified due to a larger number of facilities, greater safety, pleasant ride, and eventually increased tourist development of this part of Pohorje, which would consequently lead to increased traffic on this section