Download or read book Study of Parameters Impacting Productivity of Tunnel Boring Machines written by Hamed Hashem Pour and published by . This book was released on 2017 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tunnel construction has been on the rise for transportation of humans, freight and fluids. For a successful tunneling project, tunneling contractors must have sufficient data about scope of work, project features and characteristics of the ground to estimate the advance rate of a tunnel boring machine (TBM). The main objective of this thesis is to study tunneling case histories and literature to analyze TBM productivity based on ground conditions, diameter and the duration of each project. Project data was tabulated and results are reported in this thesis. The methodology used to conduct the literature relied on databases such as ProQuest, Engineering Village, Science Direct, Google Scholar, and ASCE Library. Additionally, Tunnels and Tunneling International Magazine as well as TBM manufactures' websites were studied. The conclusions of this thesis show that in-depth ground investigations, such as using pilot tunnels, will improve construction productivity of tunnel operations. Other factors impacting productivity include compressive strength of rocks or hard ground, rock abrasivity, tunnel diameter, location of project (whether urban or rural), and other factors as determined in this thesis.

Download or read book Improving Productivity of Tunnel Boring Machines written by Nicholas Jencopale and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Tunneling with tunnel boring machines (TBMs) is one of the most mechanized and sophisticated processes within the construction industry. However, there are considerable risks when venturing down several hundred feet where the conditions cannot be accurately determined in advance. Months and years of planning, engineering, profiling, researching, and scheduling go into a typical tunneling project before any ground breaking event. This thesis discussed in detail the growing technologies of the tunneling process using tunnel boring machines (TBM). First, some background information on tunneling and the use of a TBM was provided to introduce the process and the industry being discussed. A tunnel boring machine is unique to each project based on the ground conditions that will be encountered, the diameter and length of the tunnel, as well as several other technical and dynamic factors. After the introduction, the thesis examined a case study of a tunnel project, the Jollyville Transmission Main for the Water Treatment Plant #4 in Austin, Texas. More specifically, one of the TBMs used will be studied in order to maximize production. The details of this project provide an opportunity to discuss production improvements, scheduling impacts, and project costs. Different methods and their effect on the overall project outcome were compared. The case study information was compared with literature, as well as on-the-job information gained from discussions with the project manager, superintendents, and other on-site personnel. This research concluded that given certain circumstances, the use of a continuous conveyor, rather than the muck car/rail method, has potential for a quicker completion schedule and a greater profit for the contractor.

Download or read book Hardrock Tunnel Boring Machines written by Bernhard Maidl and published by John Wiley & Sons. This book was released on 2012-01-09 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the fundamentals of tunneling machine technology: drilling, tunneling, waste removal and securing. It treats methods of rock classification for the machinery concerned as well as legal issues, using numerous example projects to reflect the state of technology, as well as problematic cases and solutions. The work is structured such that readers are led from the basics via the main functional elements of tunneling machinery to the different types of machine, together with their areas of application and equipment. The result is an overview of current developments. Close cooperation among the authors involved has created a book of equal interest to experienced tunnelers and newcomers.

Download or read book Development of a Production Estimation Model for Tunnel Boring Machines TBMs written by Saeed Janbaz and published by . This book was released on 2017 with total page 159 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advance rate (AR) estimation is a crucial factor at the conceptual phase of a tunneling project for preliminary estimation of tunnel boring machines' (TBMs') usage. The primary objective of this research is to develop order of magnitude performance charts for advance rate of TBMs that can be used using the limited information about the tunneling progress at the conceptual phase. The secondary objective of this dissertation is to evaluate factors that impact TBM progress in large diameter applications. Tunnel diameter and uniaxial compressive strength of ground are found to be some of the primary parameters for prediction of advance rate. Statistical analysis was used to produce an advance rate formula. Then performance charts were developed for specific rock conditions. The results were tested with use of case studies. The results of this dissertation showed that the highest amount of overestimation for case studies considered by these performance charts was 16%. The outcome of this dissertation can assist in prediction of tunnel boring machine's advance rate at the conceptual stage of a tunneling project based on uniaxial compressive strength of rock and diameter of the tunnel.

Download or read book ITF Research Reports Moving Freight with Better Trucks Improving Safety Productivity and Sustainability written by OECD and published by OECD Publishing. This book was released on 2011-04-19 with total page 361 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report identifies potential improvements in terms of more effective safety and environmental regulation for trucks, backed by better systems of enforcement, and identifies opportunities for greater efficiency and higher productivity.

Download or read book Practical Management of Tunneling with Tunnel Boring Machines written by Nuh Bilgin and published by CRC Press. This book was released on 2024-02-12 with total page 253 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the management of mechanized tunneling with examples from global projects. It starts with an introduction to mechanized tunneling including management of job organization, planning job sites, portals, or launching boxes in mountains/open fields and urban areas. The management of the transport with belt conveyors, locomotives, and multi-service vehicles is explained with numerical examples. Cost management and basic parameters governing tunneling costs in different countries are discussed. Risk management in mechanized tunneling projects is also explained. Features: Offers the practical issues with setting up a job site, the cost, and logistic issues related to tunneling. Reviews cost management and basic parameters governing tunneling costs in different countries. Covers treatment of spoil management plan and the management of contaminated ground. Explores key points on the logistics and the management of the consumables. Provides the latest international case studies of specific companies. This book is aimed at professionals and researchers in tunneling, civil and mining engineering, and geology.

Download or read book Rock cutter Boreability Parameters written by Fun-Den Wang and published by . This book was released on 1975 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This research was undertaken to study the factors which affect mechanical rock cutting performance of tunnel boring machines to result in a basis for prediction of advanced rates and the establishment of basic machine design criteria. Cf. Introd.

Download or read book Prediction of Instability and Ground Movements During Tunnel Construction in Non homogenous Conditions written by Vasiliki Founta and published by . This book was released on 2018 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in tunneling technology, notably in the widespread use of closed-face tunneling boring machines, have reduced 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 challenge. These problems are especially significant for 'mixed face' conditions, where the tunnel boring machine encounters soils of contrasting mechanical and/or hydraulic properties. This thesis uses finite element simulations to investigate the control of face stability and ground deformations for shallow tunnels in soft ground. The primary control parameters of interest are the face pressures imposed by earth pressure balance (EPB) or slurry shield machines, and the grouting pressures used to control deformations around the tail void at the rear of the tunnel shield. Stability is evaluated by methods of (c-phi) strength reduction, for a range of ground conditions including i) undrained failure in low permeability clays with continuous and discontinuous (mixed face) strength profiles; and ii) drained shearing in high permeability sands above and below the water table, where the closed-face conditions at the tunnel face provide an impermeable membrane. The numerical results are synthesized into a series of generalized design charts for immediate application. Numerical simulations using 3D finite element models are also used to investigate the factors influencing ground movements for closed-face tunneling operations using a relatively simple elastic-perfectly plastic model of soil behavior. These analyses show that maximum surface deformations above the tunnel can be estimated by simple addition of constituent sources associated with the face pressure, shield shape (conicity), machine weight (buoyancy) and grouting pressure. The research proposes a simplified method for predicting the surface settlements based on analytical parameterization of the numerical results, enabling direct design of parameters for controlling ground deformations associated with tunneling for mixed-face conditions in clays. The proposed methodology for predicting ground settlement has been evaluated using data from three well-documented case studies: 1) Crossrail C300 beneath Hyde Park in London, where tunnels were bored through units of stiff clay; 2) Downtown Line DTL3 (C933) in Singapore where tunnels traversed an interface between stiff Old Alluvium and overlying soft marine clays; and 3) northern sections of the MTRA Blue Line in Bangkok, where tunnels were built below the interface between soft and stiff clays. The comparisons between computed and measured data from these projects show that the proposed generic design method achieves comparable agreement to site specific numerical simulations and empirical methods such as ANN. Further studies are now needed to extend the model for mixed face conditions with contrasting permeability.

Download or read book Factors Affecting Excavation Using Tunnel Boring Machine written by Ahmad Sayufei Zainuddin and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of Geotechnical Challenges in Mining Tunneling and Underground Infrastructures written by Amit Kumar Verma and published by Springer Nature. This book was released on 2022-06-03 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book consists of selected papers presented at the International Conference on Geotechnical Challenges in Mining, Tunneling and Underground Infrastructures (ICGMTU), held as a virtual conference on December 20, 2021. The papers represent the research work in the related fields of underground mining, ground control, mining geotechnics, geo-instrumentation, mine tunnelling, and underground structures. It focuses on the latest technology being implemented including artificial intelligence and machine learning applications to solve challenges in mining tunneling and geotechnical structure engineering. It also highlights the state-of-the-art technologies adopted by the civil and mining industry for their commercial as well as environmental benefits. The papers are presented by an international pool of academics, research scientist, and industrial experts and therefore cater to the global audience from the field of underground engineering.

Download or read book Rock Hardness Index Properties and Geotechnical Parameters for Predicting Tunnel Boring Machine Performance written by Peter J. Tarkoy and published by . This book was released on 1975 with total page 650 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book TBM Tunnelling in Jointed and Faulted Rock written by Nick R. Barton and published by CRC Press. This book was released on 2000-01-01 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: This practical guide describes the stage-by-stage development of a method for predicting the penetration rate (PR) and the advance rate (AR) for tunnel boring machines based on an expanded version of the Q-value, QTBM. The author analyzes 145 TBM tunnels that total 1,000km in length. He then develops simple formulae to estimate PR and AR from the QTBM value and to back-calculate QTBM from performance data. The book quantitatively explains actual advance rates as high as five m/hr for one day or as low as 0.005 m/hr for several months. It also covers logging methods, empirical TBM tunnel support design, and numerical verification of support.

Download or read book Productivity in Construction written by S. P. Dozzi and published by . This book was released on 1993 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Tunnel Boring Machine Performance Study written by and published by . This book was released on 1984 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Introduction to Tunnel Construction written by David Chapman and published by CRC Press. This book was released on 2017-11-27 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt: Tunnelling provides a robust solution to a variety of engineering challenges. It is a complex process, which requires a firm understanding of the ground conditions as well as the importance of ground-structure interaction. This book covers the full range of areas related to tunnel construction required to embark upon a career in tunnelling. It also includes a number of case studies related to real tunnel projects, to demonstrate how the theory applies in practice. New features of this second edition include: the introduction of a case study related to Crossrail’s project in London, focussing on the Whitechapel and Liverpool Street station tunnels and including considerations of building tunnels in a congested urban area; and further information on recent developments in tunnel boring machines, including further examples of all the different types of machine as well as multi-mode machines. The coverage includes: Both hard-rock and soft-ground conditions Site investigation, parameter selection, and design considerations Methods of improving the stability of the ground and lining techniques Descriptions of the various main tunnelling techniques Health and safety considerations Monitoring of tunnels during construction Description of the latest tunnel boring machines Case studies with real examples, including Crossrail’s project in London Clear, concise, and heavily illustrated, this is a vital text for final-year undergraduate and MSc students and an invaluable starting point for young professionals and novices in tunnelling.

Download or read book Rock Hardness Index Properties and Geotechnical Parameters for Predicting Tunnel Boring Machine Performance written by Peter Joseph Tarkoy and published by . This book was released on 1975 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Comparative Study of Tunnel Boring Machine Versus Conventional Method Using Computer written by Carlito Esquito Bayan and published by . This book was released on 1970 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: