- Numerical Modeling of Long-Term Performance of Buried Pipes
- H.J. Siriwardane ; S.B.K. Varre ; R.K. Gondle
- ICGE Colombo 2015
- Year: 2015
- Numerical & Constitutive Modeling ; Underground Structures
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- 3D numerical back-prediction of tunnelling-induced settlements on an existing reinforced concrete building
- A. Amorosi ; D. Boldini ; V. Fargnoli
- Year: 2015
- Tunneling ; Underground Structures
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- Tunnel face stability investigation by means of 3D numerical analysis and hand calculations
- D. Borbely ; R. Lorincz
- Year: 2015
- Tunneling ; Underground Structures
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- Predictive tools for the ground deformation induced by EPB tunnelling: a comparative study
- M. Ochmanski ;
- Year: 2015
- Tunneling ; Underground Structures
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- Monitoring dataset of deformations related to deep excavations for North-South Line in Amsterdam
- M. Korff ; F. J. Kaalberg
- IS SEOUL '14
- Year: 2014
- Deep Excavations ; Underground Structures ; Instrumentation
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- Relevant relations in order to better assess preconsolidation pressure values for the design of underground constructions in soft ground
- J. C. Gress
- IS SEOUL '14
- Year: 2014
- Underground Structures ; Site Characterization & In-situ Testing (General)
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- Impact of in situ stresses on underground cavern design
- K. F. Chan ; P. C. Stone
- IS SEOUL '14
- Year: 2014
- Underground Structures ; Numerical & Constitutive Modeling
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- A preliminary study on the structural stability of room-and-pillar underground structures
- C. Lee ; H. -S. Shin ; S. -H. Chang
- IS SEOUL '14
- Year: 2014
- Underground Structures
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- On area-specific underground research laboratory for geological disposal of high-level radioactive waste in China
- J. Wang
- Book Title / Journal: Journal of Rock Mechanics and Geotechnical Engineering
- Year: 2014 , Volume: 6
- Tunneling ; Underground Structures
- Description
- Underground research laboratories (URLs), including “generic URLs” and “site-specific URLs”, are underground facilities in which characterisation, testing, technology development, and/or demonstration activities are carried out in support of the development of geological repositories for high-level radioactive waste (HLW) disposal. In addition to the generic URL and site-specific URL, a concept of “area-specific URL”, or the third type of URL, is proposed in this paper. It is referred to as the facility that is built at a site within an area that is considered as a potential area for HLW repository or built at a place near the future repository site, and may be regarded as a precursor to the development of a repository at the site. It acts as a “generic URL”, but also acts as a “site-specific URL” to some extent. Considering the current situation in China, the most suitable option is to build an “area-specific URL” in Beishan area, the first priority region for China's high-level waste repository. With this strategy, the goal to build China's URL by 2020 may be achieved, but the time left is limited.
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- Underground space planning in Helsinki
- A. Vähäaho
- Year: 2014 , Volume: 6
- Tunneling ; Underground Structures
- Description
- This paper gives insight into the use of underground space in Helsinki, Finland. The city has an underground master plan (UMP) for its whole municipal area, not only for certain parts of the city. Further, the decision-making history of the UMP is described step-by-step. Some examples of underground space use in other cities are also given. The focus of this paper is on the sustainability issues related to urban underground space use, including its contribution to an environmentally sustainable and aesthetically acceptable landscape, anticipated structural longevity and maintaining the opportunity for urban development by future generations. Underground planning enhances overall safety and economy efficiency. The need for underground space use in city areas has grown rapidly since the 21st century; at the same time, the necessity to control construction work has also increased. The UMP of Helsinki reserves designated space for public and private utilities in various underground areas of bedrock over the long term. The plan also provides the framework for managing and controlling the city's underground construction work and allows suitable locations to be allocated for underground facilities. Tampere, the third most populated city in Finland and the biggest inland city in the Nordic countries, is also a good example of a city that is taking steps to utilise underground resources. Oulu, the capital city of northern Finland, has also started to ‘go underground’. An example of the possibility to combine two cities by an 80-km subsea tunnel is also discussed. A new fixed link would generate huge potential for the capital areas of Finland and Estonia to become a real Helsinki-Tallinn twin city.
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- Grouting techniques for the unfavorable geological conditions of Xiang'an subsea tunnel in China
- D. Zhang ; Q. Fang ; H. Lou
- Book Title / Journal: Journal of Rock Mechanics and Geotechnical Engineering
- Year: 2014 , Volume: 6
- Tunneling ; Underground Structures ; Engineering Geology ; Grouting
- Description
- One of the major challenges during subsea tunnel construction is to seal the potential water inflow. The paper presents a case study of Xiang'an subsea tunnel in Xiamen, the first subsea tunnel in China. During its construction, different grades of weathered geomaterials were encountered, which was the challenging issue for this project. To deal with these unfavorable geological conditions, grouting was adopted as an important measure for ground treatment. The grouting mechanism is first illustrated by introducing a typical grouting process. Then the site-specific grouting techniques employed in the Xiang'an subsea tunnel are elaborated. By using this ground reinforcement technique, the tunneling safety of the Xiang'an subsea tunnel was guaranteed.
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- Design and installation of buried large diameter HDPE pipelines in a coastal area
- D ; E. Pasqualini ; F. Mazzier ; I. Bellezza
- Proceedings of the 18th International Conference on Soil Mechanics and Geotechnical Engineering, Paris, September 2-6 2013
- Year: 2013
- Underground Structures
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- Analysis of hydro-mechanical processes in a ventilated tunnel in an argillaceous rock on the basis of different modelling approaches
- B. Garitte ; A. Bond ; A Millard ; C. Zhang ; C Mcdermott ; S. Nakama ; A.. Gens
- Book Title / Journal: Journal of Rock Mechanics and Geotechnical Engineering
- Year: 2013 , Volume: 5
- Tunneling ; Underground Structures
- Description
- In this paper, a modelling benchmark exercise from the DECOVALEX-2011 project is presented. The benchmark is based on the performance and results of a laboratory drying test and of the ventilation experiment (VE) carried out in the Mont Terri Underground Rock Laboratory (URL). Both tests involve Opalinus clay. The work aims at the identification, understanding and quantification of mechanisms taking place during the ventilation of a gallery in argillaceous host rocks on one hand and at investigating the capacity of different codes and individuals to reproduce these processes on the other hand. The 4-year in situ VE took place in a 1.3 m diameter unlined tunnel and included two resaturation–desaturation cycles. The test area was equipped with over one hundred sensors (including the global water mass balance of the system, relative humidity (RH), water content, liquid pressure, relative displacement and concentration of some chemical species) to monitor the rock behaviour during ventilation. The laboratory drying experiment, carried out before the VE, was designed to mimic the in situ conditions. The work was organized in a progressive manner in terms of complexity of the computations to be performed, geared towards the full hydro-mechano-chemical (HMC) understanding of the VE, the final objective. The main results from the modelling work reported herein are that the response of the host rock to ventilation in argillaceous rocks is mainly governed by hydraulic processes (advective Darcy flow and non-advective vapour diffusion) and that the hydro-mechanical (TM) back coupling is weak. A ventilation experiment may thus be regarded as a large scale-long time pump test and it is used to determine the hydraulic conductivity of the rock mass.
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- General Report of TC204 - Underground Constructions
- A. Bezuijen ; T.G.S. Dias
- Proceedings of the 18th International Conference on Soil Mechanics and Geotechnical Engineering, Paris, September 2-6 2013
- Year: 2013
- Underground Structures ; Tunneling ; Tunneling in Rock
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- Monitoring and Instrumentation of demonstrators storage cells (CMHM)
- J. Morel ; F. Bumbieler ; P. Teixeira ; O. Gay
- Proceedings of the 18th International Conference on Soil Mechanics and Geotechnical Engineering, Paris, September 2-6 2013
- Year: 2013
- Instrumentation ; Underground Structures
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