Uzorkovanje tla u geotehničkom istražnom bušenju

undergraduate thesis

• Title (english): Soil sampling in geotechnical exploratory drilling
• Author: Hrvoje Ivčević
• Mentor: Boris Kavur (mentor)
• Mentor: Jasmin Jug (komentor)
• Committee member: Sanja Kovač (predsjednik povjerenstva)
• Committee member: Boris Kavur (član povjerenstva)
• Committee member: Jasmin Jug (član povjerenstva)
• Committee member: Stjepan Strelec (član povjerenstva)
• Granter: University of Zagreb; Faculty of Geotechnical Engineering; Varaždin
• Defense date and country: 2021-09-16, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Interdisciplinary Technical Sciences; Environmental Engineering

Abstract

Geotehnički istražni radovi (GIR) provode se radi dobivanja geotehničkog profila
tla koji mora dati uvid u litološki sastav i mehanička svojstva tla na određenoj
lokaciji. U ovom radu obrađena je problematika istražnog geotehničkog bušenja
i metoda uzorkovanja tla i stijena prilikom bušenja. U drugom poglavlju
prikazane su standardne metode i načini dobivanja poremećenih i
neporemećenih uzoraka u različitim tipovima tla i stijena. Norma ISO 22475-1
razlikuje 3 glavne kategorije metoda uzorkovanja: A, B i C kategoriju. Pod A
kategoriju spadaju uzorci dobiveni odgovarajućim postupkom uzorkovanja
primjenom uzorkivača prikladne konstrukcije s obzirom na tip tla i stanje u
kojem se tlo nalazi (čvrstoća, stupanj prekonsolidacije), te je njome moguće
dobiti uzorke najviših klasa kvalitete 1 ili 2. Jedino uzorci A kategorije i najviše
klase kvalitete 1 se mogu koristiti za ispitivanja čvrstoće, krutosti i
konsolidacijskih svojstava tla. Pod B kategoriju spadaju uzorci dobiveni iz
bušaćih alatki (jednostruke jezgrene cijevi) ili SPT-a, koji sukladno normi mogu
biti klase kvalitete 3 do 5. Ovi uzorci mogu se koristiti za klasifikacijska
ispitivanja i eventualno za ispitivanja vlažnosti pod uvjetom da se mogu uvrstiti
pod klasu 3. U C kategoriju spadaju uzorci dobiveni destruktivnim bušenjem na
temelju kojih se eventualno može dobiti samo redoslijed slojeva u tlu. U trećem
poglavlju prikazano je rukovanje uzorcima, te načini njihove zaštite u prijevozu i
pohrani.

Abstract (english)

Geotechnical investigation and testing are conducted to provide a geotechnical
soil profile that can give us insight into the lithological composition and
mechanical soil properties of a specific location. The bachelor thesis presents
the problems of geotechnical exploratory drilling, soil and rock sampling
methods while drilling. Standard methods and means of recovering of disturbed
and undisturbed samples in diferent soil and rock types are presented in
chapter 2. The ISO 22475-1 standard differentiates between 3 main categories
of soil sampling methods: A, B and C. Category A consists of samples that are
obtained using relevant procedures of sampling using samplers that are of
adequate structure with regards to a soil type and soil condition ( firmness,
overconsolidation ratio) while having the ability to obtain samples of quality
class 1 or 2 which are the highest classes. Only category A samples and
samples of quality class 1 can be used for testing firmness, rigidity and
consolidation properties of soil. Category B consists of samples that are
obtained by using drilling rigs ( a single-tube core barrel ) or SPT, which are of
quality classes 3 through 5 according to the ISO standard. These samples can
be used for classification, and humidity tests provided they can be classified as
quality class 3. Category C consists of samples obtained by using destructive
drilling, which can only determine the sequence of different soil layers. The
handling, and the methods of preservation of samples during transport and
storage are presented in chapter 3.

• Keywords: uzorkovanje tla; neporemećeni uzorak; kategorija uzorkovanja; klasa kvalitete uzorka
• Keywords (english): soil sampling; undisturbed sample; category of soil sampling; quality class of a sample
• Language: croatian
• URN:NBN: urn:nbn:hr:130:351874
• Study programme: Title: Environmental Engineering; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/ baccalaurea) inženjer/ inženjerka inženjerstva okoliša (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/ baccalaurea) inženjer/ inženjerka inženjerstva okoliša)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2021-10-27 07:37:18