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Schaktfri ledningsbyggnad: En kostnadsanalys mellan styrd borrning och konventionell schaktning
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Building Technology and Design.
2019 (Swedish)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesisAlternative title
Trenchless pipeline installation : A cost analysis between directional drilling and traditional excavation (English)
Abstract [sv]

Styrd borrning är en schaktfri metod för att förlägga ledningar i mark. Examensarbetet har utförts i samarbete med Styrud Ingenjörsfirma AB som uppfattat en okunskap i branschen över prisbilden för styrd borrning. Syftet med arbetet är att utföra en kostnadsanalys för att beskriva hur styrd borrning står sig ekonomiskt mot konventionell schaktning. Arbetet undersöker även vilka faktorer som påverkar en eventuell ekonomisk brytpunkt, vilken i detta arbete definieras som den punkt när en viss metod blir det ekonomiskt gynnsamma alternativet. Studien har utformats för att så objektivt som möjligt belysa ämnet med utgångspunkten att göra metoderna jämförbara analytiskt. För att genomföra en analys har en beräkningsmodell skapats. Målet med modellen och dess utformning är att den enkelt skall gå att bygga vidare på och utvecklas i framtiden samt att användas av projektörer som en fingervisning tidigt i projekteringsstadiet. Från beräkningsmodellen har 70 fiktiva fall studerats. Resultatet visar att styrd borrning är billigare i 73% av fallen. I övriga fall tyder resultatet på att styrd borrning som metod generellt sett inte är så dyrt att övervägning att använda metoden försvinner. Genom resultat och analys dras slutsatsen att styrd borrning i de flesta fall står sig ekonomiskt starkt som alternativ till konventionell schaktning.

Abstract [en]

Horizontal directional drilling is a trenchless method used to install pipelines underground. This thesis is conducted in collaboration with Styrud Ingenjörsfirma AB, who perceived lacking knowledge within the industry regarding the financial aspects of directional drilling. The purpose of this thesis is to carry out a cost analysis that defines how directional drilling stands financially against traditional excavation. The study also intends to describe which factors that influence a possible economic breakpoint, in this study referring to when a certain method becomes the economically strongest alternative. This thesis has been carried out to as objectively as possible describe the topic focusing on making the methods analytically comparable. To carry out the analysis, an economic model has been created. The model and its design have been created in a manner that makes it easy to develop it in the future and aims to act as a guide for project planners to indicate which method to proceed with. From the economic model, 70 cases have been studied. The result shows that directional drilling is cheaper in 73% of the cases. In the rest of the cases, the result suggests that directional drilling as a method generally is not so expensive that consideration of using the method disappears. Through results and analysis, it is concluded that directional drilling in most cases is a strong alternative to traditional excavation from an economic standpoint.

Place, publisher, year, edition, pages
2019. , p. 41
Series
TRITA-ABE-MBT ; 19261
Keywords [en]
directional drilling, traditional excavation, pipeline, cost analysis
Keywords [sv]
styrd borrning, konventionell schaktning, ledningsbyggnad, kostnadsanalys
National Category
Other Civil Engineering
Identifiers
URN: urn:nbn:se:kth:diva-259691OAI: oai:DiVA.org:kth-259691DiVA, id: diva2:1353004
External cooperation
Styrup Ingenjörsfirma AB
Educational program
Bachelor of Science in Engineering - Constructional Engineering and Design
Available from: 2019-09-20 Created: 2019-09-20 Last updated: 2019-09-24

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