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- Spross, Johan, 1986-, et al.
(author)
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Optimization of LCC for soil improvement using Bayesian statistical decision theory
- 2022
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In: Proceedings of the 8th International Symposium on Reliability Engineering and Risk Management. - Singapore. ; , s. 392-397
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Conference paper (peer-reviewed)abstract
- Design decisions in geotechnical engineering typically need to be made under considerable uncertainty, both regarding presentgeotechnical conditions and future events occurring during the service life of the structure. To optimize the utility of societalinvestments, design decisions should consider the life cycle cost (LCC) and not only the construction cost. This paper investigates theapplicability of Bayesian statistical decision theory to assist in this decision making. The paper illustrates the concepts with a practicalexample, where a geotechnical engineer considers three design alternatives for the foundation of a road embankment: pre-fabricatedvertical drains with a surcharge, end-bearing and floating dry deep mixing columns. The effect of a potential extreme groundwaterdrawdown event on the LCC of these alternatives is analyzed and discussed. Concluding remarks are made on the relevance of suchdesign tools in a structured risk management in geotechnical engineering projects.
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| 2. |
- Spross, Johan, 1986-, et al.
(author)
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Risk management procedure to understand and interpret the geotechnical context
- 2022
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In: Georisk. - : Informa UK Limited. - 1749-9518 .- 1749-9526. ; 16:2, s. 235-250
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Journal article (peer-reviewed)abstract
- Unexpected and unforeseen geotechnical events cause large cost increases in geotechnical engineering projects and threaten construction workers’ health and safety all around the world. Practical tools and guidelines for how to implement structured and effective risk management methods in geotechnical engineering projects are however few and rarely applied. The Swedish Geotechnical Society has therefore published a methodology for this issue. A key activity in this methodology is to create an understanding of and to interpret the geotechnical context in which the project is to be carried out. This paper presents a guide for how practising geotechnical engineers, hydrogeologists, and other related professionals can perform this activity in a structured way. The procedure is illustrated through the foundation design for a new office building in a geotechnically challenging environment.
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| 3. |
- Spross, Johan, 1986-, et al.
(author)
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Toward risk-based life cycle assessments in geotechnical design
- 2022
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Reports (other academic/artistic)abstract
- Following an increased focus on societal sustainability, life-cycle considerations have become more important for owners of geotechnical engineering structures. A structural design shall not only perform well at the completion of the structure, but facilitate structural performance over the whole service life. A sustainable geotechnical design should therefore strive to minimise the total life-cycle cost of the structure. As a consequence, the design needs to consider the effect of potential future hazards and allow for cost-effective maintenance.This report takes a first step toward risk-based life-cycle assessments in geotechnical design. The report reviews the current state of the art of probabilistic life-cycle assessments in civil engineering, with a focus on geotechnical design. Based on this, a probabilistic decision tool for geotechnical design from a life-cycle perspective is proposed. The applicability of the tool is then illustrated for a practical case, where different design alternatives for an embankment foundation on soft clay (vertical drains or dry deep mixing columns) are evaluated with respect to a potential groundwater drawdown event, occurring during the service life of the embankment. To facilitate this life-cycle cost assessment, novel reliability-based design methodologies were developed both for surcharges on vertical drains and for dry deep mixing columns. The research results are summarised in this final report and in six scientific articles, which have been appended.
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| 5. |
- Strömberg, Larissa, et al.
(author)
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Making Concrete Pavements Competitive by Using the Standardized Framework for Comparisons of Infrastructure Projects in Terms of Cost-Efficiency and Climate Impact
- 2020
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In: Nordic Concrete Research. - : Walter de Gruyter GmbH. - 0800-6377 .- 2545-2819. ; 62:1, s. 21-39
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Review (peer-reviewed)abstract
- espite the new Swedish client requirement to reduce the climate impact from the construction of roads, there has been relatively little research so far on how the optimization measures regarding the environmental impact of road pavements can be integrated in the traditional design. An increase in axle weights, changes of the traditional ways of travel, e.g. the use of automated and guided vehicles, and stricter customer requirements on reducing the climate impact require new approaches to steer the road and pavement industry towards more climate neutral solutions. This paper analyzes the latest standards for sustainability assessment of engineering works in an attempt to adjust these standards for assessing various road design options in a comparable and fair way, also when various materials are included.
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