A Method For Designing Deep Underground Structures Subjected To Dynamic Loads

Author : R.S. Sinha
Publisher : Elsevier
ISBN 13 : 0444599029
Total Pages : 501 pages
Book Rating : 4.25/5 ( download)

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Download or read book Underground Structures written by R.S. Sinha and published by Elsevier. This book was released on 2012-12-02 with total page 501 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the most up to date information relevant to the design and instrumentation of underground structures. The structure might be a tunnel, shaft, cavern, or pressure unit, or a combination thereof. Empirical, rational, numerical, convergence and confinement, and discontinuity analysis methods are treated comprehensively. Special chapters are devoted to underground structures in rock burst, swelling, squeezing, and seismic zones. Water control, instrumentation, and tunneling through soft ground are also treated extensively. Sections on the design of pressure tunnels, shafts, caverns, shotcreting, water control, and soft ground tunnels are informative and authoritative. Worked examples are included on the design of rock tunnels, soft ground tunnels, and the treatment of underground structures through difficult ground. Extensive references are provided, and figures, sketches and photographs aid presentation. Important tables on planning, and case histories, allow the reader to build confidence in his design of underground structures. The book will be beneficial to civil, structural, geotechnical and mining engineers, geologists, and planners and managers associated with the design and construction of underground structures.

Author : James R. Britt
Publisher :
ISBN 13 :
Total Pages : 80 pages
Book Rating : 4.15/5 ( download)

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Download or read book Charts for Preliminary Design of Deep Underground Structures Subjected to Dynamic Loads written by James R. Britt and published by . This book was released on 1977 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author : James L. Drake
Publisher :
ISBN 13 :
Total Pages : 50 pages
Book Rating : 4.52/5 ( download)

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Download or read book A Method for Designing Deep Underground Structures Subjected to Dynamic Loads written by James L. Drake and published by . This book was released on 1976 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes solutions to a class of dynamic elastoplastic problems that model some of the salient features of the response of hardened underground facilities in rock. The theoretical model consisted of multilayered concentric cylinders of elastoplastic materials with time-dependent loads applied to the exterior boundary. Each element in the cross section was assumed to be incompressible and its yield governed by a Mohr-Coulomb failure criterion. The number of elements within the cross section was not limited. Solutions of the theoretical model were cast in the general form normally used in structural dynamics: Mass x Acceleration = External applied load - Internal resistance. The resulting equations can be quickly and inexpensively evaluated on a digital computer. To extend the range of validity of the exact theory, a first-order correction factor was developed to account for the compressibility of the materials, and a simple method to treat backpacked structures was introduced. The theory was verified by comparing calculated values with experimental measurements from small-scale static and explosively driven tunnel collapse studies. Good agreement was noted for all cases considered. (Author).

Author : J. P. Morris
Publisher :
ISBN 13 :
Total Pages : 11 pages
Book Rating : 4.61/5 ( download)

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Download or read book Simulation of an Extensive Underground Structure Subjected to Dynamic Loading Using the Distinct Element Method written by J. P. Morris and published by . This book was released on 2004 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: We present results from an investigation into the stability of underground structures in response to explosive loading. Field tests indicate that structural response can be dominated by the effect of preexisting fractures and faults in the rock mass. Consequently, accurate models of underground structures must take into account deformations across fractures and not simply within the intact portions of the rock mass. The distinct element method (DEM) is naturally suited to simulating such systems because it can explicitly accommodate the blocky nature of natural rock masses. We will discuss details specific to our implementation of the DEM and summarize recent results.

Author : Zhen-Dong Cui
Publisher : Springer
ISBN 13 : 9811377324
Total Pages : 847 pages
Book Rating : 4.27/5 ( download)

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Download or read book Design of Underground Structures written by Zhen-Dong Cui and published by Springer. This book was released on 2019-08-09 with total page 847 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a general review of the literature on underground structures, combined with new specifications, engineering case studies, and numerical simulations based on the authors’ research. It focuses on the basic concepts, theories, and methods of the design of underground structures. After an introduction, it covers various topics, such as elastic foundation beam theory and numerical analysis methods for underground structures, as well as the design of shallow underground structures, diaphragm wall structures, shield tunnel structures, caisson structures, immersed tube structures, and integral tunnel structures. It also includes tables for calculating elastic foundation beam. This book is intended for senior undergraduate and graduate students majoring in urban underground space engineering, building engineering, highway engineering, railway engineering, bridge and tunnel engineering, water conservancy and hydropower engineering.

Author : Hasan Tosun
Publisher : BoD – Books on Demand
ISBN 13 : 1839693738
Total Pages : 90 pages
Book Rating : 4.31/5 ( download)

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Download or read book Theory and Practice of Tunnel Engineering written by Hasan Tosun and published by BoD – Books on Demand. This book was released on 2022-05-25 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tunnel construction is expensive when compared to the construction of other engineering structures. As such, there is always the need to develop more sophisticated and effective methods of construction. There are many long and large tunnels with various purposes in the world, especially for highways, railways, water conveyance, and energy production. Tunnels can be designed effectively by means of two and three-dimensional numerical models. Ground–structure interaction is one of the significant factors acting on economic and safe design. This book presents recent data on tunnel engineering to improve the theory and practice of the construction of underground structures. It provides an overview of tunneling technology and includes chapters that address analytical and numerical methods for rock load estimation and design support systems and advances in measurement systems for underground structures. The book discusses the empirical, analytical, and numerical methods of tunneling practice worldwide.

Author : James R. Britt
Publisher :
ISBN 13 :
Total Pages : 78 pages
Book Rating : 4.65/5 ( download)

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Download or read book Charts for Preliminary Design of Deep Underground Structures Subjected to Dynamic Loads written by James R. Britt and published by . This book was released on 1977 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents charts suitable for preliminary dynamic design of deep underground protective structures in rock subjected to long-duration ground shock loadings produced by nuclear weapons. The charts were calculated using a theoretical model which consists of multilayered concentric cylinders of elastoplastic materials with a time-dependent, axially symmetric applied load representing the free-field stress. Each element in the cross section is assumed to be incompressible and its yield is governed by a Monr-Coulomb failure criterion. A first-order correction factor is given to account for compressibility of the materials. (Author).

Author : L. A. Glenn
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.09/5 ( download)

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Download or read book Simulations of Underground Structures Subjected to Dynamic Loading Using the Distinct Element Method written by L. A. Glenn and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We present preliminary results from a parameter study investigating the stability of underground structures in response to explosion-induced strong ground motions. In practice, even the most sophisticated site characterization may lack key details regarding precise joint properties and orientations within the rock mass. Thus, in order to place bounds upon the predicted behavior of a given facility, an extensive series of simulations representing different realizations may be required. The influence of both construction parameters (reinforcement, rock bolts, liners) and geological parameters (joint stiffness, joint spacing and orientation, and tunnel diameter to block size ratio) must be considered. We will discuss the distinct element method (DEM) with particular emphasis on techniques for achieving improved computational efficiency, including the handling of contact detection and approaches to parallelization. We also outline the continuum approaches we employ to obtain boundary conditions for the distinct element simulations. Finally, our DEM code is used to simulate dynamic loading of a generic subterranean facility in hardrock, demonstrating the suitability of the DEM for this application.

Author : Khosrow Bakhtar
Publisher :
ISBN 13 :
Total Pages : 110 pages
Book Rating : 4.25/5 ( download)

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Download or read book Dynamic Loading Experiments on Model Underground Structures written by Khosrow Bakhtar and published by . This book was released on 1985 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author :
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.20/5 ( download)

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Download or read book Simulations of Underground Structures Subjected to Synamic Loading Using the Distinct Element Method written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors present results from a parameter study investigating the stability of underground structures in response to ground shock. Direct simulation requires detailed knowledge of both the facility itself and the surrounding geology. In practice, however, key details (joint spacing, joint stiffness, reinforcement) may not be available. Thus, in order to place bounds upon the predicted behavior of a given facility, an extensive series of simulations representing different realizations may be required. They will discuss the distinct element method (DEM) with particular emphasis on techniques for achieving improved computational efficiency, including the handling of contact detection and approaches to parallelization. Some continuum approaches to the simulation of underground facilities are discussed along with results from underground explosions. Finally, their DEM code is used to simulate dynamic loading of several generic subterranean facilities in hard rock for a range of joint properties and sources, demonstrating the suitability of the DEM for this application.