Article
Engineering, Geological
Mats Tidlund, Johan Spross, Stefan Larsson
Summary: Rock tunnel construction involves significant geotechnical uncertainty and requires stringent risk management procedures. The observational method is promoted as an effective tool, but its practical application is limited. This paper presents a case study of a tunnel construction project in Iceland where the observational method played a key role in managing the challenging geological conditions. The study discusses the definition of the observational method in Eurocode 7 and related contractual aspects.
GEORISK-ASSESSMENT AND MANAGEMENT OF RISK FOR ENGINEERED SYSTEMS AND GEOHAZARDS
(2023)
Article
Chemistry, Multidisciplinary
Filip Dodigovic, Kreso Ivandic, Meho-Sasa Kovacevic, Bozo Soldo
Summary: This paper proposes modifications to the reliability-based robust geotechnical design method in order to simplify the approach, reduce computational costs, and align the results with Eurocode 7. By replacing the existing robustness measure with a generalised reliability index and conducting sensitivity analyses using Soboli indices, the required number of reliability analyses can be significantly decreased. Additionally, conducting analyses only for selected designs within the scope of the genetic algorithm further reduces computational burden.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Geological
Jiang Su, Alan Bloodworth
Summary: Groundwater pressure is the main cause of debonding in composite SCL tunnels, and this paper focuses on the failure mechanisms, numerical simulation methods, and practical implications on lining design and membrane interface testing. By introducing a conceptual relationship and two numerical modelling approaches, the study quantifies stresses and failure mechanisms of the membrane interface in composite SCL tunnels.
PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-GEOTECHNICAL ENGINEERING
(2022)
Article
Engineering, Geological
Zilong Zhang, Qiujing Pan, Zihan Yang, Xiaoli Yang
Summary: This study proposes a hybrid deep learning model that combines data-driven and physics-based strategies to reduce calculation costs and reliance on large amounts of training data. The model is able to reasonably reproduce ground deformation fields with a small amount of training data, showing potential for engineering applications.
Article
Construction & Building Technology
Andrei Kervalishvili, Ivar Talvik
Summary: This paper studies the stability of axially loaded steel columns with compact rectangular hollow sections at elevated temperatures. The current Eurocode model for checking the buckling resistance of columns in fire may give unsafe results due to the complex non-linear behavior of steel. An analytical method is proposed to determine the buckling resistance of steel columns at elevated temperatures, taking into account variable non-linear stiffness properties. A finite element model is developed and a numerical study is conducted to explore the effects of different parameters. The proposed method is validated and demonstrates improved accuracy compared to the current Eurocode method.
Article
Construction & Building Technology
Xin Wang, Yingda Zhang, Wen Zhao, Zhaopeng Wang, Zhiguo Wang, Ying Wang
Summary: The construction process of Earth pressure balance shield (EPBS) generates a large amount of untreatable shield dregs, which create environmental and cost issues when transported to landfills. In this study, a method is proposed to utilize waste silty clay as a replacement for bentonite in a modified slurry, called bentonite-silty clay (BSC). Through various tests, the optimal additive, dosage scheme, and performance optimization of BSC are determined. The study provides a feasible way for recycling discharged soil from EPBS tunnel construction.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Environmental Sciences
Ali Nasiri Khiavi, Raoof Mostafazadeh, Maryam Adhami
Summary: This study applied Machine Learning Algorithms (MLAs) to model groundwater quality in Ardabil province, Iran, and determined that the Random Forest algorithm was the most optimal. The findings showed that more than 50% of the studied area had low groundwater quality, which can guide managers and planners in developing appropriate management models and strategies for groundwater resource exploitation.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Li Zhao, Liangtong Zhan, Haihua Zhang, Yihao Zhang, Linbo Wu, Runze Zhao, Liangfeng Zheng, Guibao Zhang
Summary: This study developed a method for tracking groundwater pollution plumes at landfill sites, which was successfully applied to a typical landfill site and its downstream area. The method can identify different types and scales of groundwater pollution plumes and reveal their pollution sources.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Engineering, Civil
Kreso Ivandic, Filip Dodigovic, Bozo Soldo, Meho Sasa Kovacevic
Summary: According to Eurocode 7, analysis procedures in geotechnical engineering must achieve a prescribed safety margin based on design action and resistance conditions. However, these semi-probabilistic procedures do not provide consistent values for the Overall Factor of Safety (OFS) and do not guarantee equal probabilities of relevant limit state occurrences. This study focuses on a comparative analysis of a centrically loaded spread foundation to quantify the required modification of the equivalent Overdesign Factor (ODF) and OFS based on the required reliability index beta and failure probability pf.
PERIODICA POLYTECHNICA-CIVIL ENGINEERING
(2022)
Article
Engineering, Geological
Chenxi Zhao, Qinghua Lei, Zixin Zhang, Simon Loew
Summary: The study develops a three-dimensional fully-coupled hydro-mechanical model to simulate groundwater drainage, stress redistribution, rock mass consolidation, and fault zone deformation. The results indicate that ground surface displacements originate from deep subsurface water drainage and rock mass consolidation, and the construction of the high-speed tunnel could trigger fault shearing via drainage-induced pressure diffusion and poroelastic stressing. This research has important implications for groundwater drainage-related geoengineering activities.
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
(2023)
Article
Construction & Building Technology
Gabor Hajdu, Ferenc Papp
Summary: This paper carries out a safety assessment of the General Method (GM) in Eurocode 1993-1-1:2005, focusing on the accuracy of stability verification for steel structures. By using geometrically and materially nonlinear analysis with imperfections (GMNIA) and calculating exact imperfection factors, the inaccuracy of standard calibrations is excluded and the real accuracy of the GM is reflected in the results.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2022)
Article
Environmental Sciences
Can Bulent Karakus
Summary: The most suitable areas with groundwater potential in the adjacent area of Sivas Municipality, Turkey, were determined using the GIS-based Best-Worst Method (BWM) and Step-Wise Weight Assessment Ratio Analysis (SWARA) methods. Various criteria such as slope, drainage density, lithology, and rainfall were used to assess groundwater potential, and the results showed areas ranging from excellent to very low potential. The accuracy of the model was found to be very good overall, and the groundwater potential mapping created will contribute to better groundwater resource development and water management planning.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Yu-Hong Yeung, David A. Barajas-Solano, Alexandre M. Tartakovsky
Summary: We developed a physics-informed machine learning approach for estimating transmissivity and hydraulic head in a subsurface flow model. The method, called PICKLE, demonstrated comparable accuracy to the standard MAP method but was significantly faster for large-scale problems. The approach used conditional Karhunen-Loeve expansions and mesh discretization to control the number of parameters without being limited by the mesh size.
WATER RESOURCES RESEARCH
(2022)
Article
Construction & Building Technology
Peng Jiang, Benchao Liu, Yuting Tang, Zhengyu Liu, Yonghao Pang
Summary: This study introduces a novel deep learning-based electrical method that jointly inverses resistivity and chargeability to estimate water-bearing structures and water volume. Compared with traditional linear inversion methods, the proposed method demonstrates superiority in locating and delineating anomalous bodies, reducing solution multiplicity.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2024)
Article
Environmental Sciences
Georgios Boumis, Mukesh Kumar, John R. Nimmo, T. Prabhakar Clement
Summary: Groundwater recharge is estimated by measuring the change in groundwater levels, but direct measurement is costly. The widely used method is water-table fluctuation, which estimates recharge based on groundwater level rise. We propose using recession data from specific seasons to improve this method.
WATER RESOURCES RESEARCH
(2022)
Article
Engineering, Geological
Johan Spross, Hakan Stille, Fredrik Johansson, Arild Palmstrom
ROCK MECHANICS AND ROCK ENGINEERING
(2018)
Article
Engineering, Geological
Anders Prastings, Johan Spross, Stefan Larsson
PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-GEOTECHNICAL ENGINEERING
(2019)
Article
Engineering, Civil
Johan Spross, Tobias Gasch
Article
Construction & Building Technology
William Bjureland, Fredrik Johansson, Andreas Sjolander, Johan Spross, Stefan Larsson
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2019)
Article
Engineering, Geological
Johan Spross, Hakan Stille, Fredrik Johansson, Arild Palmstrom
ROCK MECHANICS AND ROCK ENGINEERING
(2020)
Article
Engineering, Geological
Johan Spross, Stefan Larsson
Summary: The paper introduces a novel probabilistic design methodology to determine the suitable surcharge load for embankment construction on clayey soil, in combination with vertical drain design, in order to ensure the established design criteria are met with acceptable probability.
Article
Engineering, Geological
Johan Spross, Niclas Bergman, Stefan Larsson
Summary: This paper probabilistically investigated two serviceability limit states of deep mixing columns from a system reliability perspective, and proposed a design framework employing the observational method that considers various factors, facilitating an effective reduction of the geotechnical uncertainty and promoting risk-aware decision-making.
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING
(2021)
Article
Engineering, Geological
Johan Spross, Tobias Gasch, Fredrik Johansson
Summary: Modern tunnelling in rock relies on monitoring and observations during construction to reduce uncertainty. This paper presents an application example of establishing reliability-based thresholds to ensure the serviceability of a shotcrete lining in a challenging geological setting, and discusses practical approaches to consider model and transformation uncertainties.
GEORISK-ASSESSMENT AND MANAGEMENT OF RISK FOR ENGINEERED SYSTEMS AND GEOHAZARDS
(2023)
Article
Engineering, Geological
Mohammad Mohammadi, Johan Spross, Hakan Stille
Summary: In this study, the probabilistic time and cost estimation model was improved and applied to estimate the total tunneling time of the Uri hydropower project in India. The improvements allow for a more accurate consideration of geological features and disruptive events, resulting in a distribution of tunneling time. The study demonstrates the importance of understanding the geological setting and its impact on construction performance for effective risk management.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Ida Samuelsson, Johan Spross, Stefan Larsson
Summary: Construction and infrastructure projects contribute significantly to global greenhouse gas emissions, including geotechnical engineering works that have environmental impact and costs throughout their life cycle. Integrating assessments of environmental impact and costs into the geotechnical design process could enhance sustainability. This paper presents a methodology for integrating life-cycle assessment and life-cycle cost analysis into geotechnical design, demonstrated with a practical example on high-speed railway embankment fill methods.
PROCEEDINGS OF THE INSTITUTION OF CIVIL ENGINEERS-ENGINEERING SUSTAINABILITY
(2023)
Article
Engineering, Geological
Davi Rodrigues Damasceno, Johan Spross, Fredrik Johansson
Summary: This paper presents a reliability-based design tool for underground lined rock caverns (LRCs) for storing hydrogen gas. The adaptive directional importance sampling (ADIS) method is used with a 3D finite element (FE) model to evaluate small probabilities of failure. An illustrative example based on an LRC in Skallen, southwestern Sweden, demonstrates the implementation and applicability of the design tool. The results show that this LRC design meets the expected safety requirements, with at least good quality rock mass needed for different geological conditions.
GEORISK-ASSESSMENT AND MANAGEMENT OF RISK FOR ENGINEERED SYSTEMS AND GEOHAZARDS
(2023)
Article
Engineering, Geological
Johan Spross, Lars Olsson, Hakan Stille, Staffan Hintze, Olle Batelsson
Summary: The Swedish Geotechnical Society has published a methodology to guide the implementation of structured and effective risk management methods in geotechnical engineering projects. One 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.
GEORISK-ASSESSMENT AND MANAGEMENT OF RISK FOR ENGINEERED SYSTEMS AND GEOHAZARDS
(2022)
Article
Engineering, Geological
Johan Spross, Lars Olsson, Hakan Stille
GEORISK-ASSESSMENT AND MANAGEMENT OF RISK FOR ENGINEERED SYSTEMS AND GEOHAZARDS
(2018)
Article
Engineering, Civil
Anders Prastings, Johan Spross, Rasmus Muller, Stefan Larsson, William Bjureland, Fredrik Johansson
ASCE-ASME JOURNAL OF RISK AND UNCERTAINTY IN ENGINEERING SYSTEMS PART A-CIVIL ENGINEERING
(2017)
Proceedings Paper
Engineering, Geological
William Bjureland, Johan Spross, Fredrik Johansson, Anders Prastings, Stefan Larsson
GEO-RISK 2017: RELIABILITY-BASED DESIGN AND CODE DEVELOPMENTS
(2017)
