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Assessment of climate impact and costs comparing two railway embankment fill methods
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Soil and Rock Mechanics.ORCID iD: 0000-0002-1406-668X
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Soil and Rock Mechanics.ORCID iD: 0000-0001-5372-7519
KTH, School of Architecture and the Built Environment (ABE), Civil and Architectural Engineering, Soil and Rock Mechanics.ORCID iD: 0000-0001-9615-4861
2023 (English)In: Proceedings The Fifth International Conference on New Developments in Soil Mechanics and Geotechnical Engineering, Springer Nature , 2023, p. 181-189Conference paper, Published paper (Refereed)
Abstract [en]

Emissions from infrastructure projects and construction projects have a large impact on the environment. Construction activities and materials, including geotechnical engineering works, account for a great share of that impact and the monetary costs of the projects. In railway projects, crushed bedrock is often used as fill material in the embankments, and less suitable soil is excavated and transported to a landfill causing emissions. Despite that, sustainability assessments are rarely made when comparing the crushed bedrock fill method with other alternative methods, when the geotechnical engineer is designing an embankment. This paper, therefore, shows how climate impact and monetary costs can be compared for two fill methods in a railway embankment in Sweden, namely crushed rock fill and fill made of cement-stabilized sandy till. A comparing life cycle assessment (LCA) of climate impact and a life cycle cost analysis (LCCA) of monetary costs were made for the two methods. Activities and materials used in the production and construction stages were assessed. The results show that the stabilized sandy till method had both a smaller climate impact and lower life cycle cost (LCC) than the crushed bedrock fill method. 

Place, publisher, year, edition, pages
Springer Nature , 2023. p. 181-189
Keywords [en]
Soil stabilization, geotechnical engineering, life cycle assessment, life cycle cost analysis, climate impact
National Category
Geotechnical Engineering and Engineering Geology
Research subject
Civil and Architectural Engineering, Soil and Rock Mechanics
Identifiers
URN: urn:nbn:se:kth:diva-324589DOI: 10.1007/978-3-031-20172-1_17ISI: 001006517100017Scopus ID: 2-s2.0-85151050923OAI: oai:DiVA.org:kth-324589DiVA, id: diva2:1741800
Conference
The Fifth International Conference on New Developments in Soil Mechanics and Geotechnical Engineering, Nicosia (Online), June 30 to July 2, 2022.
Funder
Swedish Transport AdministrationSven Tyrén Trust
Note

QC 20230411

Available from: 2023-03-07 Created: 2023-03-07 Last updated: 2025-02-07Bibliographically approved
In thesis
1. LCA and LCCA in the design of geotechnical engineering works
Open this publication in new window or tab >>LCA and LCCA in the design of geotechnical engineering works
2023 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

Geotechnical engineering works are part of almost all construction and infrastructure projects. The geotechnical engineering work contributes to the impact on the environment and gives rise to costs throughout its life cycle. Life Cycle Assessment (LCA) and Life Cycle Cost Analysis (LCCA) are established methods for evaluating a product's environmental impact and costs. However, the use of these methods is not extensive for geotechnical engineering works. A literature review showed that there is published research, but as the research topic is relatively new, there are many research gaps. A few topics in geotechnical engineering are better investigated than others and the entire life cycle is often not evaluated, usually only the production and construction stages. Although LCA and LCCA are established methods, the methodology for evaluating geotechnical engineering works needs further development to increase the evaluation work of sustainability aspects. In this licentiate thesis, a methodology is presented of how LCA and LCCA can be integrated into the geotechnical design process. The integration enables changes to the geotechnical design to further reduce the LCA and LCCA result, which is presented in the methodology. The methodology also presents a way to evaluate the possible geotechnical designs to select the most sustainable design based on the LCA and LCCA results. The thesis also presents the performance of LCA and LCCA for geotechnical engineering works and solutions to several difficulties that the geotechnical engineer may encounter during the evaluation of environmental impact and costs. 

Abstract [sv]

Geotekniska konstruktioner är en del av i stort sett alla konstruktions- och infrastrukturprojekt. Den geotekniska konstruktionen bidrar till påverkan på miljön samt ger upphov till kostnader under hela sin livscykel. Livscykelanalys (LCA) och livscykelkostnadsanalys (LCCA) är etablerade metoder för att utvärdera en produkts miljöpåverkan respektive kostnader. Användningen av dessa metoder är dock inte stor för geotekniska konstruktioner. En litteraturgenomgång visade att det finns publicerad forskning men då forskningsämnet är relativt nytt finns det många forskningsluckor. Ett fåtal ämnen inom geoteknik är bättre utredda än andra och hela livscykeln är oftast inte utvärderad utan vanligtvis endast produktions- och konstruktionssteget. Trots att LCA och LCCA är etablerade metoder behöver metodiken för utvärdering av geotekniska konstruktioner utvecklas för att öka utvärderingsarbetet av hållbarhetsaspekter. I denna licentiatuppsats presenteras en metodik för hur LCA och LCCA kan integreras i den geotekniska designprocessen. Integreringen möjliggör ändringar av den geotekniska designen för att ytterligare reducera LCA- och LCCA-resultatet vilket presenteras i metodiken. Metodiken redovisar även ett sätt för att utvärdera de möjliga geotekniska designerna för att utifrån LCA- och LCCA-resultaten välja den mest hållbara designen.  Uppsatsen redovisar även utförandet av LCA och LCCA för geotekniska konstruktioner och lösningar på ett flertal svårigheter som geoteknikern kan påträffa under utvärderingen av miljöpåverkan och kostnader. 

Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2023. p. 45
Series
TRITA-ABE-DLT ; 2310
Keywords
Life Cycle Assessment, Life Cycle Cost Analysis, climate impact, costs, geotechnical engineering, Livscykelanalys, Livscykelkostnadsanalys, klimatpåverkan, kostnader, geoteknik
National Category
Geotechnical Engineering and Engineering Geology
Research subject
Civil and Architectural Engineering, Soil and Rock Mechanics
Identifiers
urn:nbn:se:kth:diva-324591 (URN)978-91-8040-514-0 (ISBN)
Presentation
2023-04-05, Q11, Malvinas väg 6A, KTH Campus, https://kth-se.zoom.us/j/64992247158, Stockholm, 10:00 (English)
Opponent
Supervisors
Funder
Swedish Transport AdministrationSven Tyrén Trust
Note

QC 230313

Available from: 2023-03-13 Created: 2023-03-07 Last updated: 2025-02-07Bibliographically approved

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Samuelsson, IdaSpross, JohanLarsson, Stefan

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