- Design and Behavior of A Deep Excavation Adjacent to Existing Buildings and Tunnels
- Q. LI ; W.D. Wang ; Z.H. Xu
- ICGE Colombo 2015
- Year: 2015
- Deep Excavations ; Tunneling ; Instrumentation
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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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- Microseismic Monitoring Developments in Hydraulic Fracture Stimulation
- M. van der Baan ; D. Eaton ; M- Dusseault
- Book Title / Journal: Effective and Sustainable Hydraulic Fracturing
- Year: 2013 , Series: Chapter 21
- Instrumentation ; Mining
- Description
- The last decade has seen a significantly increased interest in microseismic monitoring by the hydrocarbon industry due to the recent surge in unconventional resources such as shale-gas
and heavy-oil plays. Both hydraulic fracturing and steam injection create changes in local pore pressures and in situ stresses and thereby brittle failure in intact rock plus additional slip/shearing in naturally fractured rock. Local rock failure or slip yields an acoustic emission, which is also known as a microseismic event. The microseismic cloud represents thus a volumetric map of the extent of induced fracture shearing, opening and closing. Microseismic monitoring can provide pertinent information on in situ reservoir deformation due to fluid stimulation, thus ultimately facilitating reservoir drainage. This paper reviews some of the current key questions and research in microseismicity, ranging from acquisition, processing to interpretation.
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- Importance of Fracture Closure to Cuttings Injection Efficiency
- M. Bai ; A. Diaz ; J. McLennan ; Ju Reyna
- Book Title / Journal: Effective and Sustainable Hydraulic Fracturing
- Year: 2013 , Series: Chapter 39
- Instrumentation
- Description
- The major benefit of adequate fracture closure is to release injection pressure and restore it to its initial magnitude during the shut-in period to prevent gradual pressure build-up over the injection batches that follow. This paper examines a number of injection cases where the
benefits of adequate fracture closure and the detrimental impacts of insufficient fracture closure are respectively revealed.
In-depth examination of fracture closure impact can be set for short durations with relatively fewer injection batches, as well as for long periods with numerous batch injections. The former scenario focuses on determining the physics of the individual fracture closure, while the latter situation emphasizes the general trend with respect to peak pressure at the end of injection and terminal pressure at the end of the shut-in period.
In addition, this paper addresses the added complexities during fracture closing after shut-in
that can be identified from the relationship between injection pressure and the G function
superposition derivative. Straight-line behavior usually indicates that the formation is homogeneous and leak-off from the fracture into the formation is linear. Other responses such
as concave or convex shapes of the G superposition derivative relationship may indicate the formation is either naturally fractured or tight (i.e., low permeability). Or, the pressure decline
shapes may imply fracture tip extension, or fracture height recession. Direct examination of
the pressure decline curves may reveal the relationship between the fracture responses and
formation characteristics.
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- Soil Fracturing Induced by Land Subsidence in Mexico City
- M. Juárez ; E. Méndez ; G. Auvinet
- Proceedings of the 18th International Conference on Soil Mechanics and Geotechnical Engineering, Paris, September 2-6 2013
- Year: 2013
- Groundwater Pumping ; Instrumentation
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- Geotechnical protection of engineering infrastructure objects in large cities under intense anthropogenic impact and long term operation
- A.N. Perminov ; V.N. Zentsov ; N.A. Perminov
- Proceedings of the 18th International Conference on Soil Mechanics and Geotechnical Engineering, Paris, September 2-6 2013
- Year: 2013
- Tunneling ; Instrumentation
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- Role of the facing on the behaviour of soil-nailed slopes under surcharge loading
- S. Cola ; A. Bisson ; P. Simonini ; N. Sanvitale
- Proceedings of the 18th International Conference on Soil Mechanics and Geotechnical Engineering, Paris, September 2-6 2013
- Year: 2013
- Retaining Walls ; Instrumentation ; Earth Retaining Structures
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- Investigation of differential movement at railroad bridge approaches through geotechnical instrumentation
- D. Mishra ; E. Tutumluer ; T.D. Stark ; J. Hyslip ; S. Chrismer ; M. Tomas
- Book Title / Journal: Journal of Zhejang University
- Year: 2012 , Volume: 13
- Instrumentation
- Description
- Railway transitions experience differential movements due to differences in track system stiffness, track damping characteristics, foundation type, ballast settlement from fouling and/or degradation, as well as fill and subgrade settlement. This differential movement is especially problematic for high speed rail infrastructure as the ‘bump’ at the transition is accentuated at high speeds. Identification of different factors contributing towards this differential movement, as well as development of design and maintenance strategies to mitigate the problem is imperative for the safe and economical operation of both freight and passenger rail networks. This paper presents the research framework and initial instrumentation details from an ongoing research effort at the University of Illinois at Urbana-Champaign. Three bridge approaches experiencing recurrent geometry problems were instrumented using multidepth deflectometers (MDDs) and strain gages to identify different factors contributing to the development
of differential movements.
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- Automated Landslide Instrumentation Programs on US Route 2 in Crookston, MN
- D.D. Dasenbrock
- Book Title / Journal: Proceedings of the University of Minnesota 58th Annual Geotechnical Engineering Conference
- Year: 2010
- Landslides ; Slope Stability ; Instrumentation
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- Monitoring and evaluation of movements in gravity quay walls
- Antonio Soriano ; Manuel Valderrama ; Jess González
- 17th International Conference on Soil Mechanics and Geotechnical Engineering (Alexandria)
- Year: 2009
- Ports ; Caisson Foundations ; Instrumentation
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- Monitoring of performance in four dikes on soft soil
- J.L. Justo ; J. Saura ; Silva E.M.J. Da ; C. Soriano ; P. Durand
- 17th International Conference on Soil Mechanics and Geotechnical Engineering (Alexandria)
- Year: 2009
- Instrumentation ; Geosynthetics for Reinforcement ; Settlements
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- Modelling and web processing of early warning
- R. Holland ; M. Janik ; H. Krummel ; S. Jager ; B. Thiebes ; T. Glade ; R Bell
- Book Title / Journal: International Conference : Landslide Processes - From Geomophologic Mapping to Dynamic Modelling in Strassbourg France
- Year: 2009 , Series: Chapter 3: Landslide modeling - Methods for hazard and risk quantification
- Landslides ; Slope Stability ; Instrumentation ; Geomorphology
- Abstract
- Within lanslide early warning systems, a continuous challenge is the on-site implementation of a robust monitoring system, a reliable data collection and cross-checked analysis, and the presentation of respective results in a real-time mode. This paper will describe one concept of an integrated early warning system developed within the German BMBF-funded ILEWS project. This system is based on a variety of factors. The connection of geomorphological knowledge, geotechnical and geophysical information, sensor networks and web-based applications are examined. In the Swabian Albm one system has been installed and first results will be presented. These results give some indications of the potential of a real-time landslide early warning system ready to be used by various end-users and stakeholders.
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- Process-based models as instruments: how models facilitate the use of theory and data for solving various geomorphological problems
- D. Karssenberg
- Book Title / Journal: International Conference : Landslide Processes - From Geomophologic Mapping to Dynamic Modelling in Strassbourg France
- Year: 2009 , Series: Chapter 4: Outlook on landslide understanding
- Landslides ; Slope Stability ; Instrumentation ; Geomorphology
- Abstract
- Process-based models are spatio-temporal numerical models that represent real-world processes occurring in a geomorphological system. Containing scientific theory, empirical data and assumptions, they function as an instrument or tool in geomorphological research to solve a particular problem. It is discussed that the properties of a model, how it is used, and what is required to estimate its components depends on the purpose of modelling. This is shown for a number of different purposes in geomorphological research.
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- Long term piezometric data analysis to validate landslide models
- F. Pontoni ; P. Gasparetto ; M.G. Angeli
- Book Title / Journal: International Conference : Landslide Processes - From Geomophologic Mapping to Dynamic Modelling in Strassbourg France
- Year: 2009 , Series: Chapter 2: Landslide mechanics & mechanisms with focus on hydrological processes
- Landslides ; Slope Stability ; Instrumentation
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- Damage detection and health monitoring of buried concrete pipelines.
- A.S. Bradshaw ; G. da Silva ; M.T. McCue ; J. Kim ; S.S. Nadukuru ; R. Lynch ; R.L. Michalowski ; M. Pour-Ghaz ; W.J. Weiss ; R.A. Green
- Year: 2009
- Instrumentation
- Description
- Proceedings of International Symposium on Prediction and Simulation Methods for Geohazard Mitigation (IS Kyoto 2009), eds.: F. Oka, A. Murakami & S. Kimoto; Kyoto, Japan, May 25-27, 2009, pp. 473-478.
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