Journal ArticleDOI
Selection of TBM and geotechnical assessment of a microtunnel in a difficult geological environment: a case of a natural gas pipeline beneath an active landslide (Albania)
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TLDR
In this paper, an adopted methodology for Micro Tunnel Boring Machine (TBM) selection, based on the results of a geological-geotechnical feasibility assessment of a microtunnel, planned for a natural gas pipeline beneath an active landslide, in the Corovode area, southern Albania.Abstract:
This present paper presents an adopted methodology for Micro Tunnel Boring Machine (TBM) selection, based on the results of a geological-geotechnical feasibility assessment of a microtunnel, planned for a natural gas pipeline beneath an active landslide, in the Corovode area, southern Albania. This example offers an excellent case study of diverse and demanding engineering geological formations, namely disturbed and sheared types of flysch rock masses, but also recent soil deposits. A tunnel drive will confront materials that may be prone to posing challenges, such as ravelling ground at the microtunnel face, chimney failures, water inflows, as well as deformations. The selection of the appropriate tunnelling method procedure is analysed and presented step by step, addressing all issues that cover the most critical aspects of the selection process. Finally, a geotechnical feasibility assessment is presented as an overall analysis of this work, taking into consideration all the crucial design parameters for several Micro TBM types along the tunnel. Besides the expected rock mass behaviour, the TBM selection is also based on the percentage of fines at the tunnel excavation profile, the permeability and hydraulic head, which is also investigated in this study, while sticky behaviour, clogging risk, presence of obstacles and mixed ground conditions are also taken into account.read more
Citations
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Journal ArticleDOI
Hard-rock TBM jamming subject to adverse geological conditions: Influencing factor, hazard mode and a case study of Gaoligongshan Tunnel
TL;DR: Wang et al. as discussed by the authors analyzed 121 cases of hard-rock tunnel boring machine (TBM) jamming and classified the jamming modes into six categories, including collapse of surrounding rocks, fracture zone and groundwater.
Journal ArticleDOI
Mélanges in flysch-type formations: Reviewing geological constraints for a better understanding of complex formations with block-in-matrix fabric
TL;DR: In this article, a review of geological data was conducted to distinguish different types of complex formations and block-in-matrix rocks with different geotechnical and mechanical characteristics, and then potentially suggesting the application of different rock or soil mechanics procedures.
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Research on Construction of Industrial Environment System of Cross-border E-commerce in Free Trade Zone Based on Geological Environment Assessment Method
Ning Yang,Chuang Wang,Yijie Fu +2 more
TL;DR: In this article, the authors divide the engineering geological environment evaluation types into single-element evaluation and comprehensive evaluation, and uses analytic hierarchy process and fuzzy mathematical model to carry out comprehensive evaluation of engineering geological environments.
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Prediction of tunnelling-induced effects on a historic building in Rome
TL;DR: In this paper, the authors presented a Class A prediction of tunnelling-induced effects, obtained developing a three-dimensional numerical model that accounts for the complexities of the problem's geometry and construction phases.
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Construction Equipment Selection through Scenario-Based FDEA: Truck-Mixer Drums
TL;DR: In this article, the authors presented a scenario-based approach to the construction equipment selection problem through the fuzzy data envelopment analysis (FDEA), which was used for the first time in a TMD selection problem.
References
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Gsi: A Geologically Friendly Tool For Rock Mass Strength Estimation
Paul Marinos,Evert Hoek +1 more
TL;DR: In this article, a review of the estimation of rock mass strength properties through the use of GSI is presented and a discussion is given regarding the ranges of the Geological Strength Index for typical rock masses with specific emphasis to heterogeneous rock masses.
Book
Mechanised Shield Tunnelling
TL;DR: In this article, the development potential of the mechanised shield tunnelling method is far greater than that of the shotcrete method and other traditional tunnel construction because it is a safer, more effective method of tunnel construction.
Journal ArticleDOI
TBM tunnelling under adverse geological conditions: An overview
TL;DR: The adverse geological conditions frequently encountered during TBM tunnelling present great challenges, and may trigger potential hazards if no precaution and treatment measures are taken as discussed by the authors, and comprehensive studies on adverse conditions are essential and critical to successful TBM Tunnelling.
Journal ArticleDOI
Geotechnical risk assessment based approach for rock TBM selection in difficult ground conditions
TL;DR: In this article, a new approach based on decision analysis using decision tree was proposed to select the most appropriate TBM that has the minimum risk level either before or after hazards mitigation measures.
Tbm Tunnelling In Difficult Ground Conditions
TL;DR: In this paper, the authors discuss TBM tunnelling in difficult ground conditions, when problems are met which may reduce dramatically the average progress rates and practical consequences may be such as to pose serious questions on the use of mechanised TBM tunneling versus drill and blast and other traditional excavation methods.