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Showing 1 to 17 of 17 for “"underground construction"”.
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Exploration strategy for underground construction
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1992.
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High Spatial Resolution Measurement of Tendon Reinforcement in Underground Construction Works
Distributed optical fiber strain sensing is investigated as a technology to enhance the assessment of tendon reinforcement elements that are commonly used in mines and tunnelling projects. Central to this research effort is the application of a particular high spatial resolution Rayleigh optical …
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A Field Investigation of the Performance of Shotcrete in Underground Construction
Made available in DSpace on 2014-12-13T19:31:26Z (GMT). No. of bitstreams: 1 7616145.pdf: 10583026 bytes, checksum: 21785cd57a86321083cb9db7bd5bfbd9 (MD5) Previous issue date: 1976
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The economic value of geologic exploration as a risk reduction strategy in underground construction
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1984.
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Prediction of ground deformations caused by underground construction of the Tren Urbano in Rio Pierdras
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1998.
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Earth pressure balance (EPB) tunneling induced settlements in the Tren Urbano Project, Rio Piedras, Puerto Rico
Underground construction of the Rio Piedras section of the Tren Urbano project involved the construction of twin tunnels (6.3m diameter) with Earth Pressure Balance machines in weathered alluvial soil. The depth of the cover over the tunnel crown varies from 13m to 10m. The twin tunnels, which …
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Modeling uncertainty in the New York City no. 7 subway line extension project using Decision Aids for Tunnelling (DAT)
… overruns and schedule delays associated with underground construction projects, it is imperative that a detailed estimate of both be developed and considered prior to starting construction. The Decision Aids for Tunnelling (DAT) allow engineers to consider the uncertainties associated with …
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Parallel computation in efficient non-linear finite element analysis with applications to soft-ground tunneling project
… movements represent an essential component of underground construction projects in congested urban environments, to mitigate against possible damage to adjacent structures and utilities. This research was motivated by the construction of a large underground cavern for the Rio Piedras station in …
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A New Rock Bolt Design Criterion and Knowlwdge-based Expert System for Stratified Roof
… has become the most dominant support method in underground construction. However, because of the geological environment, the design process for roof bolt systems is an art rather than a science. To quantify the selection of bolting systems a MSBT (minimum solid beam thickness) approach was …
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Defining Stress Changes Ahead of a Tunnel Face and Design of a Data Acquisition System
With increasing world population, demand for underground construction is expected to accelerate in the future. Design of tunnels in rock is still largely empirical, while rock failure in underground mines and tunnel construction continues to claim lives. A seismic method to aid in increasing safety …
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Imaging ahead of a tunnel boring machine with DC resistivity: a laboratory and numerical study
… (TBMs) are powerful tools for tunneling and underground construction, which excavate material and install a segmental concrete tunnel liner for support. However, unknown ground conditions pose a significant risk to tunneling operations and any damage to the machine can be disastrous to a …
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Geometry assessment and strength/stiffness monitoring of lime and cement modified soils via characterization of curing-induced property changes estimated from seismic wave propagation techniques and electrical resistivity
… the engineering properties of soil in civil and underground construction applications. Such additives change the properties of the soil by forming cementing agents that bond soil grains together. This cementing process increases the strength/stiffness and reduces the hydraulic conductivity of the …
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Geotechnical engineering design of a tunnel support system - a case study of Karuma (600MW) hydropower project
… urbanization and industrialization, the construction of underground tunnel structures are preferred as they limit interferences with existing surface uses of the land and water bodies. Although underground tunnels are a common flexible construction alternative, they are high hazard risk …
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Prediction of instability and ground movements during tunnel construction in non-homogenous conditions
… risks and greatly increased the productivity of underground construction projects. For shallow tunnels in 'soft ground', instabilities can create collapse mechanisms that propagate to the ground surface, while the prediction and control of tunnel-induced ground deformations remain a key …
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Predicting tunnel boring machine utilization using discrete event simulation models for hard rocks
Tunnel Boring Machines (TBM) are perhaps the most efficient method for tunnel excavation, as they have become the dominant mode and method of tunneling around the world. One of the essential steps for justification of the use of TBMs as well as planning the completion time and estimating the cost …
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A comparative study of trenchless technologies versus traditional open trenching for the replacement of ageing potable water pipelines
Submitted in fulfilment of the requirements of the Degree of Magister Technologiae: Civil Engineering, Durban University of Technology, Durban, South Africa, 2013.
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Developing a system to measure rheology of conditioned soil for soft-ground TBM tunneling
… witnessed rapid expansion of the tunneling and underground construction industry in the past few decades. Among all tunnel construction methods, the growth of soft-ground tunneling using Earth Pressure Balance (EPB) Tunnel Boring Machines (TBMs) has been the most significant. EPB TBMs use the …