Numeričko modeliranje kolapsa pokrovnih naslaga na okršenoj vapnenačkoj podlozi

master's thesis

• Title: Numeričko modeliranje kolapsa pokrovnih naslaga na okršenoj vapnenačkoj podlozi : diplomski rad
• Title (english): Numerical modeling of cover colapse sinkholes – case study : master's thesis
• Author: Anja Barić
• Mentor: Biljana Kovačević Zelić (mentor)
• Committee member: Biljana Kovačević Zelić (predsjednik povjerenstva)
• Committee member: Helena Vučenović (član povjerenstva)
• Committee member: Dubravko Domitrović (član povjerenstva)
• Granter: University of Zagreb; Faculty of Mining, Geology and Petroleum Engineering; (Department of Mining and Geotechnical Engineering); Zagreb
• Defense date and country: 2023-11-17, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mining, Petroleum and Geology Engineering; Mining

Abstract

Nakon potresa magnitude 6.4, koji se dogodio 29. prosinca 2020. godine s epicentrom u Petrinji pojavilo se preko 100 pokrovno-urušnih vrtača na površini od približno 1 km2 tijekom nekoliko mjeseci od potresa. Geotehnički istražni radovi na promatranom području izvedeni su početkom 2021. godine. Analizirani su postojeći geološki i hidrogeološki podaci te su zabilježene geometrije vrtača. U blizini najveće vrtače, koja se nalazila u Mečenčanima, izvedene su dvije istražne bušotine s kontinuiranim jezgrovanjem. U istim bušotinama izveden je standardni penetracijski pokus. Naknadno su izvedena i laboratorijska ispitivanja fizikalnih, indeksnih i projektnih svojstava tla. Modeliran je karakterističan profil tla, za najveću vrtaču, koji je korišten za numeričke analize kako bi se ispitali mogući mehanizmi loma te izvršile parametarske analize radi utvrđivanja ovisnosti utjecaja geometrije i stanja naprezanja na nastanak pokrovno-urušnih vrtača.

Abstract (english)

After the magnitude 6.4 earthquake that occurred on December 29, 2020, with its epicentre in Petrinja, more than 100 cover-collapse sinkholes appeared over an area of approximately 1 km2 in the months following the earthquake. Geotechnical site investigations were carried out in the area affected by the earthquake in early 2021. Existing geological and hydrogeological data were analysed, and the geometries of the sinkholes were recorded. Two exploratory drillings with core sampling were conducted near the largest sinkhole, located in the Mečenčani village. Standard penetration tests were performed in the same boreholes. Subsequently, laboratory tests of physical, index, and engineering properties were conducted. A typical soil profile was modelled for the largest sinkhole, which was used for numerical analyses to investigate potential failure mechanisms and perform parametric analyses to determine the dependencies of the influence of geometry and stress conditions on the formation of cover-collapse sinkholes.

• Keywords: potres; urušna vrtača; krš; numeričko modeliranje
• Keywords (english): earthquake; cover-collapse sinkhole; karst; numerical modelling
• Language: croatian
• URN:NBN: urn:nbn:hr:169:331344
• Study programme: Title: Mining Engineering; specializations in: Mining engineering, Geotechnical engineering, Waste treatment and disposal; Course: Mining engineering; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka rudarstva (magistar/magistra inženjer/inženjerka rudarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2024-01-10 12:34:41