Download or read book Application of Rock Mass Classification Systems for Future Support Design of the Dim Tunnel Near Alanya written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this thesis, the results of a number of rock mass classification systems applied to Dim-higway tunnel study area are presented. The tunnel ground was classified according to Rock Mas Rating (RMR), Modified Rock mass Rating (M-RMR), Rock mass quality (Q), Geological Strength Index (GSI) and New Austrian Tunneling Method (NATM). Dim Tunnel has a horse-shoe shape, with a diameter of 10 meters and maximum overburden thickness of 70 meters. During studies, the geological and geotechnical characteristics of the rock mass along the Dim Tunnel route were investigated. The main objective of rock mass classifications carried out in this study was to obtain adequate data that could be used in future excavation and support-design studies. In order to accomplish this task, literature survey was carried out, followed by a comprehensive field study and laboratorytesting. Field studies involved detailed discontinuity surveys of the exposed rock mass at the surface and on the cores taken within 10-20 meters of the borehole above the tunnel. A geological map and a geological cross-section along the tunnel axis were also prepared. Finally, correlations between the results of the rock mass classification systems were made carrying out statistical analyses for the Dim Tunnel study area. The results obtained from the RMR and M-RMR classifications indicate that M-RMR system estimates better rock mass quality ratings at the upper bounds of the rock mass condition, but worst ratings at the lower bounds (RMR is less than 40) as also suggested by the previous studies.
Download or read book Underground Space Use Analysis of the Past and Lessons for the Future Two Volume Set written by Sören Erdem and published by CRC Press. This book was released on 2005-06-30 with total page 1384 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 200 papers in this two-volume set are a selection of work by tunnel experts from Europe, Asia, and the USA, and also showcase the work of the host nation, Turkey. As the title implies, the scope of the book is enormous, covering every aspect of tunnelling from contract management to safety. The book is of special interest to researchers, scient
Download or read book Engineering Rock Mass Classification written by R K Goel and published by Elsevier. This book was released on 2011-08-09 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rock mass classification methods are commonly used at the preliminary design stages of a construction project when there is very little information. It forms the bases for design and estimation of the required amount and type of rock support and groundwater control measures. Encompassing nearly all aspects of rock mass classifications in detail, Civil Engineering Rock Mass Classification: Tunnelling, Foundations and Landsides provides construction engineers and managers with extensive practical knowledge which is time-tested in the projects in Himalaya and other parts of the world in complex geological conditions. Rock mass classification is an essential element of feasibility studies for any near surface construction project prior to any excavation or disturbances made to earth. Written by an author team with over 50 years of experience in some of the most difficult mining regions of the world, Civil Engineering Rock Mass Classification: Tunnelling, Foundations and Landsides provides construction engineers, construction managers and mining engineers with the tools and methods to gather geotechnical data, either from rock cuts, drifts or core, and process the information for subsequent analysis. The goal is to use effective mapping techniques to obtain data can be used as input for any of the established rock classification systems. The book covers all of the commonly used classification methods including: Barton’s Q and Q’ systems, Bieniawski’s RMR, Laubscher’s MRMR and Hoek’s and GSI systems. With this book in hand, engineers will be able to gather geotechnical data, either from rock cuts, drifts or core, and process the information for subsequent analysis. Rich with international case studies and worked out equations, the focus of the book is on the practical gathering information for purposes of analysis and design. Identify the most significant parameters influencing the behaviour of a rock mass Divide a particular rock mass formulation into groups of similar behaviour, rock mass classes of varying quality Provide a basis of understanding the characteristics of each rock mass class Relate the experience of rock conditions at one site to the conditions and experience encountered at others Derive quantitative data and guidelines for engineering design Provide common basis for communication between engineers and geologists
Download or read book Application of Rock Mass Classification Systems for Tunnel Temporary Support written by 司徒愷儒 and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Atlas of Oculoplastic and Orbital Surgery written by Thomas C. Spoor and published by CRC Press. This book was released on 2009-12-04 with total page 694 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since its inception two generations ago, oculoplastic surgery has constantly evolved. What was once dogma may now be passé. Procedures that were once passé may be resurrected and utilized again. Providing simplified solutions to complex problems, Atlas of Oculoplastic and Orbital Surgery is a practical, problem-orientated guide to the management of common oculoplastic and orbital disorders. Based on Dr. Spoor’s thirty years of practice, the book emphasizes the more common oculoplastic conditions likely to present to a busy ophthalmologist. The text covers upper and lower eyelid surgery and repair, orbital surgery, and the prevention and treatment of potential complications. The procedures are described with surgical photos and illustrations in a casual, didactic fashion, as a senior doctor would use instructing a resident or fellow. The book is essential reading for ophthalmologists, oculoplastic surgeons, neuro-ophthalmologists and plastic surgeons.
Download or read book Practical Handbook of Rock Mass Classification Systems and Modes of Ground Failure written by Andy Afrouz and published by CRC Press. This book was released on 1992-06-10 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: Practical Handbook of Rock Mass Classification Systems and Modes of Ground Failure is a comprehensive, yet concise, guide to 16 of the most important rock classification systems and their failure modes. The book discusses these systems in relation to the design of excavations and ground reinforcement/support under passive, active, static, and dynamic mining conditions. This includes rock testing assessment, surface and underground site investigation, and any practical activity that deals with the physical and mechanical properties of rocks. The book is an excellent professional reference for geoscientists, technicians, and geological engineers doing research and consulting in mining, geological, civil, and petroleum resource fields.
Download or read book Engineering Rock Mass Classifications written by Z. T. Bieniawski and published by Wiley-Interscience. This book was released on 1989-08-24 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first authoritative reference on rock mass classification, consolidating into one handy source information once widely scattered throughout the literature. It includes new, previously unpublished material and case histories, presents the fundamental concepts of classification schemes, and critically appraises their practical application in industrial projects such as tunneling and mining.
Download or read book Engineering Classification of Rock Masses for the Design of Tunnel Support written by Nicholas Barton and published by . This book was released on 1974 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Engineering Classification of Rock Masses for the Design of Tunnel Support written by N. Barton and published by . This book was released on 1977 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Case History Review from a Perspective of Design by Rock Mass Classification Systems written by Glenn A. Nicholson and published by . This book was released on 1988 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: The design of the Park River Auxiliary Tunnel is reviewed. The tunnel is a 2800 m (9100 ft) long, 6.7 m (22 ft) inside diameter inverted siphon-shaped tunnel constructed to bypass flood water beneath the city of Hartford, Connecticut, and transmit it directly to the Connecticut River. The tunnel was designed by and constructed for the New England Division of the U.S. Army Corps of Engineers. The approach selected for design consisted of a rational evaluation of recommended supports and rock load heights as determined from two rock mass classification design systems. Rock load heights predicted by the two classification systems were cross checked with a discrete element numerical model. The three-tiered approach of checks and balances incorporated into the design of the Park River Auxiliary Tunnel resulted in significant cost savings in final support. A comparison is also made between support requirements recommended by two additional classification systems.
Download or read book Development of Expert System for Rock Mass Classification and Support System written by Michael Neunhoffer and published by . This book was released on 1993 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: " The aim of this project was to create an expert system for the classification of rock masses and the selection of support for underground excavations. The algorithm has been written using VP-Expert. The algorithm in its current state could have been easily written in pascal but VP-Expert was used to allow for future modifications to the algorithm which may require the expert capabilities of VPExpert. The algorithm uses the Laubscher method of rock mass classification. There are three main parts to the algorithm: 1. Rock mass classification. This part of the algorithm asks for the rock characteristics to be entered so a rock mass rating (RMR) can be calculated. Before running this part of the program the core samples must be tested to find the strength and weathering properties of the rock. 2. Conditions of mining. A Mining Rock Mass Rating ( MRMR ) and a Design Rock Mass Strength (ORMS) are generated by this part of the algorithm. The MRMR takes into account the orientation of joints and bedding, blasting technique, stress concentration and the effects of exposing the rock surfaces. 3. Selection of support. The information entered and calculated in the first two parts of the algorithm is used to select a suitable form of support from a database of support systems. There are many areas for future expansion of the algorithm. For example, it could be made to read the geological information directly from a geological traverse and the stress concentrations directly from a stress analysis package. The algorithm could be modified to use custom databases for different localities. These areas have not been developed in the algorithm this year. " -- Abstract/Synopsis.
Download or read book Proceedings of the International Workshop on Rock Mass Classification in Underground Mining written by Christopher Mark and published by . This book was released on 2007 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Comparison of Rock Mass Classification Systems written by Daniel R. Stewart and published by . This book was released on 1981 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rock Mass Classification written by B. Singh and published by Elsevier. This book was released on 1999-05-05 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rock Mass Classifications - A Practical Approach in Civil Engineering was written in response to the many unanswered questions regarding this subject. Questions such as - Is Classification reasonably reliable? Can it be successful in crisis management of geohazards? Can a single Classification system be general for all rock structures? Is Classification a scientific approach? Laborious field research was undertaken in the Himalayan mountains by a team of scientists from the Central Mining Research Institute (CMRI), University of Roorkee (UOR), Central Soil and Material Research Station (CSMRS), U.P. Irrigation Research Institute (UPIRI), and Norwegian Geotechnical Institute (NGI) to answer these questions. The results obtained from the research work were systematically compiled to produce this book which bears particular relevance to civil, mining and petroleum engineers and geologists. Endorsements "It is a Handbook of Rock Engineering" - Zhao Jian, School of Civil & Structural Engineering, Nanyang Technological University, Singapore "I came across your new book - Rock Mass Classification, absolutely fantastic" - Subodh K. Jain, U.S.A
Download or read book Rockmass Behavioural Uncertainty written by and published by . This book was released on 2014 with total page 430 pages. Available in PDF, EPUB and Kindle. Book excerpt: Geotechnical Baseline Reports (GBRs) have become a prevalent risk sharing mechanism on North American tunneling projects as they are based on the following risk allocation concept: the subsurface ground conditions described within the GBR are the financial responsibility of the Contractor, whereas encountered conditions which exceed those described belong to the Owner. This interpretation is intended to reduce project bid prices due to subsurface ground conditions uncertainty and the geotechnical rationale for a differing site conditions claim. However, recent tunnel project case studies have used the GBR as a risk transfer mechanism by presenting a conservative and/or limited interpretation of the expected ground conditions. In particular, the expected ground conditions are described with a summary of the intact and rockmass properties and empirical rockmass classification systems. This research has shown that the application of intact rock properties and rockmass classification systems to describe the various rockmasses along the tunnel alignment leads to rockmass behavioural uncertainty. Empirical rockmass classification systems are not able to adequately capture the effects of geologic uncertainty and the collective impact of the individual controls on rockmass behaviour. A new rock engineering design tool was developed which utilized geologic uncertainty and the capabilities of numerical modelling methods to predict and quantify rockmass behaviours. The 3D Rockmass Behaviour Map reduces subsurface ground conditions uncertainty as the range of possible rockmass behaviours is presented as a function of the three critical geomechanics parameters. Quantifying rockmass behaviours per tunnel domain demonstrates the effects of geologic uncertainty with rockmass behaviour mode switching. GBRs should include this 3D Rockmass Behaviour Map and quantified rockmass behaviours as these tools reduce uncertainty in the expected ground conditions and provide a greater understanding of the anticipated rockmass behaviours. Rather than using a conservative GBR which shifts subsurface ground conditions risk to a Contractor, this improved prediction of the expected ground conditions may result in better subsurface risk allocation, reduced construction contingencies, aid excavation means and methods selection, reduced geotechnical basis for a differing site condition claim, and provide greater certainty in the final project price and schedule.
Download or read book Rock Mass Classification and Tunnel Reinforcement Selection Using the Q System written by Nick Barton and published by . This book was released on 1988 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper provides an overview of the Q-system and documents the scope of case records used in its development. A description of the rock mass classification method is given using the following six parameters: core recovery (RQD), number of joint sets, roughness and alteration of the least favorable discontinuities, water inflow, and stress-strength relationships. Examples of field mapping are given as an illustration of the practical application of the method in the tunneling environment, where the rock may already be partly covered by a temporary layer of shotcrete. The method is briefly compared with other classification methods, and the advantages of the method are emphasized.
Download or read book The Reliability of Rock Mass Classification Systems as Underground Excavation Support Design Tools written by Jayantha Ranasooriya and published by . This book was released on 2009 with total page 702 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study showed that the RMR and Q predicted support measures are not always compatible. In some circumstances, the two methods can either overestimate or under estimate support requirements.
