Geotehnički istražni radovi za projekt cjevovoda i potpornog zida u ulici Šušnjevec

master's thesis

• Title: Geotehnički istražni radovi za projekt cjevovoda i potpornog zida u ulici Šušnjevec : diplomski rad
• Title (english): Geotehnical investigations for the project of pipeline and retaining wall in Šušnjevec Street : master's thesis
• Author: Velimir Karasman
• Mentor: Predrag Kvasnička (mentor)
• Committee member: Predrag Kvasnička
• Committee member: Ivan Sobota
• Committee member: Želimir Veinović
• Granter: University of Zagreb; Faculty of Mining, Geology and Petroleum Engineering; (Department of Mining and Geotechnical Engineering); Zagreb
• Defense date and country: 2012-09-27, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mining, Petroleum and Geology Engineering; Mining

Abstract

Geotehničkim istražnim radovima provedenim za izgradnju javnog kanala na predviđenoj lokaciju u dijelu
ulice Šušnjevec (podsljemenska zona) prikupljeni su relevantni geološki i geotehnički podaci za potrebe
projektiranja i izvođenja predmetnog zahvata. Prema osnovnoj geološkoj karti lokacija se nalazi na
području koje izgrađuju naslage gornjeg panona. Kategorizacijom terena prema stabilnosti padina koja je
provedena u sklopu Geotehničke prospekcije utvrđeno je da se trasa i područje oko nje nalazi u II. kategoriji
stabilnosti – uvjetno stabilne padine.
Uvjetno stabilne padine su područja stabilna u prirodnim uvjetima, a prilikom građenja građevina te padine
mogu postati nestabilne. Iz toga razloga bili su potrebni geotehnički istražni radovi na temelju kojih će se
odrediti uvjeti građenja na padini i uvjeti temeljenja građevine. Geotehnički istražni radovi sastojali su se od
terenskih istražnih radova i laboratorijskih ispitivanja. U ovom slučaju terenski istražni radovi sastojali su se
od inženjersko-geoloških radova i istražnog bušenja (8 bušotina duž trase) u sklopu kojega je izvedena
terenska identifikacija i klasifikacija jezgre, inženjersko-geološka determinacija jezgre, uzorkovanje i
standardni penetracijski test (SPT), ugradnja piezometarskih i inklinometarskih cijevi u bušotine. U
geotehničkom laboratoriju određivana su fizikalna i mehanička svojstva na ne poremećenim i poremećenim
uzorcima. Inženjersko-geološkim kartiranjem lokacije te istražnim bušenjem utvrđene su naslage pokrivača
(humus, nasip i deluvijalni nanos) i podloge (pješčenjak, lapor, vapnenac i vapnenačke breče). Odabrana su
3 poprečna presjeka na kojima je analizirana postojeća stabilnost pokosa i stabilnost pokosa za fazu
izvođenja radova iskopa i polaganja kanalizacijske cijevi. Podzemna voda nije registrirana istražnim
radovima, analizom terena njena pojava se ne očekuje, tako da u proračunima nije uzeta u obzir. Proračun
stabilnosti proveden je kompjuterskim programom GEOSTUDIO 2004. Na temelju provedenih analiza
utvrđeno je kako su pokosi u zoni polaganja cjevovoda stabilni. Izuzetak je pokos iznad kolnika na početku
dionice koji je u ovom trenutku stabilan ali se pretpostavlja da će uslijed dinamičkog utjecaja prilikom
iskopa rova pokazivati znakove nestabilnosti. Zbog toga je predložen potporni zid uz rub kolnika, kojim bi
se osigurala trajna stabilnost pokosa. U radu je prikazan proračun koji dokazuje stabilnost potpornog zida i
definira njegove konačne dimenzije. Proračun je izveden po pravilima Eurokoda 7 kroz tri različita
projektna pristupa (PP1, PP2, PP3), te je prema dobivenim rezultatima provedena njihova usporedba.

Abstract (english)

Abstract: Geotechnical investigations conducted for the construction of the channel at the proposed location of the
street Šušnjevec collected relevant geological and geotechnical data for the design and execution of the
underlying project. According to the basic geological map the location is in the area that make up the upper
Pannonian sediments. Terrain categorization according to the slope stability, which was part of the
Geotechnical screening showed that the route and the area around it are located in second category of
stability - conditionally stable slopes.
Conditionally stable slopes are stable under natural field conditions, but during the process of constructing
buildings the slopes can become unstable. For this reason geotechnical investigations for determination of
construction on slope and building foundation conditions were required. Geotechnical investigations
consisted of field investigations and laboratory tests. In this case, the field investigations consisted of
engineering and geological work and exploration drilling (8 wells along the route) within which the field
identification and classification of core, engineering-geological determination of core, sampling and
standard penetration test (SPT), installation piezometric and inclinometer tube in wells are performed. The
geotechnical laboratory determined the physical and mechanical properties of the damaged and intact
samples. By engineering-geological mapping and exploration drilling, cover layers (humus, embankment
and diluvial drift) and ground layers (sandstone, marl, limestone and limestone breccia) have been
identified. 3 cross-section analyzed regarding to the existing slope stability and slope stability for the phase
of the excavation and laying of sewer pipes were selected. Ground water is not registered by research works
and according to the analysis of terrain its occurrence is not expected, so the calculation is not taken into
account. Stability calculation was performed by computer program GEOSTUDIO 2004. On the basis of the
analysis it was determined that the slopes in the pipeline laying area was stable. The exception is the slope
above the road at the beginning of the section that is currently stable, but the signs of instability should be
expected due to the dynamic impact during trench excavation. Therefore, the retaining wall along the edge
of the road has been proposed, which would ensure the permanent stability of the slope. Thesis is concerned
with the calculation of retaining wall stability and defines its dimensions. The calculation has been
performed according to the guidelines of Eurocode 7 through three different approaches (PP1, PP2, PP3)
that have been compared to each other on the basis of obtained results.

• Keywords: geotehnički istražni radovi; ulica Šušnjevec; Eurokod 7; potporni zid; proračun
• Keywords (english): Geotechnical investigations; street Šušnjevec; Eurocode 7; retaining wall; calculation
• Language: croatian
• URN:NBN: urn:nbn:hr:169:893233
• 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: Access restricted to students and staff of home institution
• Created on: 2016-03-15 14:10:45