Mogućnost primjene prethodnog miniranja u izradi bunara za temelj stupa S2 Pelješkog mosta

master's thesis

• Title (english): Possibility of applying the pre-split blasting in the construction of a foundation well for a pillar S2 of Pelješac bridge
• Author: Lucija Jakopović
• Mentor: Josip Mesec (mentor)
• Committee member: Igor Petrović (predsjednik povjerenstva)
• Committee member: Josip Mesec (član povjerenstva)
• Committee member: Stjepan Strelec (član povjerenstva)
• Committee member: Ivan Kovač (član povjerenstva)
• Granter: University of Zagreb; Faculty of Geotechnical Engineering; Varaždin
• Defense date and country: 2020-09-21, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Interdisciplinary Technical Sciences; Environmental Engineering

Abstract

U ovom diplomskom radu detaljno je obrađena metoda miniranja kojom je osim glavnog miniranja radi očuvanja okrugle konture iskopa potrebno izvesti prethodno ili prespilitng miniranje za izradu temelja Pelješkog mosta na kopnenoj strani stupom oznake S 2 promjera 11 m.
Kako se most gradi u zoni izražene seizmičnosti, konturu stupa potrebno je izvesti na način da oscilacije prilikom miniranja budu u dozvoljenim granicama.
Kako su kod prethodnih miniranja minske bušotine u uvjetima veće uklještenosti, to im se u odnosu na glatka a pogotovo proizvodna miniranja mora povećati gustoća odnosno smanjiti razmak. Zbog male koncentracije eksplozivnog punjenja po metru dužnom minske bušotine kod prethodnih (prespliting) miniranja ne dolazi do drobljenja i razaranja stijene, jer su tlačna i vlačna naprezanja stijene manja od tlačne i vlačne čvrstoće stijene. Na taj način po zamišljenoj konturi oblikuje se željena pukotina.
Rezultat otpucavanja prethodnih (prespliting) i glavnih mina prema shemama prikazanim u diplomskom radu treba biti željeni odlom po zamišljenoj konturi uz seizmičke efekte koji su u dozvoljenim granicama.

Abstract (english)

This graduate thesis describes in detail the method of blasting which, in addition to the construction blasting in order to preserve the round contour of the excavation, it is necessary to perform pre- or pre-split blasting to make the foundations of the Peljesac bridge on the mainland with a pillar S 2 which is 11 in diameter.
As the bridge is built in a zone of pronounced seismicity, the contour of a pillar must be performed in such a way that the oscillations during blasting are within the permitted limits.
As blast holes are trapped in the conditions of previous blasting, their density must be increased or the distance reduced in relation to smooth and especially constructions blasting. Due to the low concentration of explosive charge per meter length of the hole the previous (presplitting) blasting does not cause crushing and destruction of the rock, because the compressive and tensile stresses of the rock are less than the compressive and tensile strength of the rock. In this way, the desired crack is formed along the imaginary contour.
The result of presplitting and construction blasting according to the designs presented in the graduate thesis should be the desired fracture along the imaginary contour with seismic effects that are within the allowed limits.

• Keywords: Pelješki most; prethodno (prespliting) miniranje; seizmički efekti
• Keywords (english): Pelješac bridge; pre-splitting; seismic effects
• Language: croatian
• URN:NBN: urn:nbn:hr:130:948948
• Study programme: Title: Geoenvironmental Engineering; specializations in: Geoenvironmental Engineering, Environmental Management, Water Management; Course: Geoenvironmental Engineering; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/ inženjerka inženjerstva okoliša (magistar/magistra inženjer/ inženjerka inženjerstva okoliša)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2020-10-12 08:59:07