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Author: Bhaumi Bhavan Chaurasia
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Jacking is a trenchless construction technique used for installing underground pipeline system. Jacking method is more widely used for upgrading under capacity culverts and drainage structures under roads and railroad tracks. Also, this method is used for installing underground pipelines such as watermains, sewers etc.in populated and developed urban areas. In this method, culverts (segments) are installed through the ground from an entry shaft to an exit shaft. During the excavation and spoil removal processes, workers are required to be inside the pipe, this is essentially what separates pipe jacking trenchless construction method from microtunneling technology. The minimum recommended diameter for pipes installed by jacking is 42 in. as it may not be possible for a person to enter smaller diameter pipes. Pipe/box jacking projects often have to face schedule delays or loss of productivity due to inherent uncertainties in identifying unmarked under laid structures, type of soil and groundwater conditions. The contractor usually relies on the judgments, from experienced engineers and experts in forecasting productivity. This leads to development of imprecision cost estimates, and as a result, bidding price for box jacking projects is usually kept on a higher side. The main objective of this study is to identify and quantify productivity related issues in box jacking trenchless construction method based on case studies and the expert opinion of contactors, engineers and various Department of Transportation's (DOT'S) professionals involved in pipe/box jacking trenchless construction operations, using Analytic Hierarchy Process (AHP) method to rank the opinions. This study identifies six (traffic control, safety & security, availability of box storage & handling, type of spoil removal system, size of box & weight of box) factors and parameters that contractors and engineers can consider to avoid delays and improve jacking productivity. Ranking of these factors is expected to help in improving the productivity of the box jacking process by planning and executing in a more efficient manner. This research builds up the basics for modeling box jacking productivity operation during various conditions.
Author: Bhaumi Bhavan Chaurasia
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Jacking is a trenchless construction technique used for installing underground pipeline system. Jacking method is more widely used for upgrading under capacity culverts and drainage structures under roads and railroad tracks. Also, this method is used for installing underground pipelines such as watermains, sewers etc.in populated and developed urban areas. In this method, culverts (segments) are installed through the ground from an entry shaft to an exit shaft. During the excavation and spoil removal processes, workers are required to be inside the pipe, this is essentially what separates pipe jacking trenchless construction method from microtunneling technology. The minimum recommended diameter for pipes installed by jacking is 42 in. as it may not be possible for a person to enter smaller diameter pipes. Pipe/box jacking projects often have to face schedule delays or loss of productivity due to inherent uncertainties in identifying unmarked under laid structures, type of soil and groundwater conditions. The contractor usually relies on the judgments, from experienced engineers and experts in forecasting productivity. This leads to development of imprecision cost estimates, and as a result, bidding price for box jacking projects is usually kept on a higher side. The main objective of this study is to identify and quantify productivity related issues in box jacking trenchless construction method based on case studies and the expert opinion of contactors, engineers and various Department of Transportation's (DOT'S) professionals involved in pipe/box jacking trenchless construction operations, using Analytic Hierarchy Process (AHP) method to rank the opinions. This study identifies six (traffic control, safety & security, availability of box storage & handling, type of spoil removal system, size of box & weight of box) factors and parameters that contractors and engineers can consider to avoid delays and improve jacking productivity. Ranking of these factors is expected to help in improving the productivity of the box jacking process by planning and executing in a more efficient manner. This research builds up the basics for modeling box jacking productivity operation during various conditions.
Author: Hossein Tavakoli
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Trenchless Technology (TT) offers methods to install utilities through the ground without damaging the surface. Box Jacking is a trenchless method for installation of prefabricated box and drainage structures without digging a trench. The concept of box jacking is similar to pipe jacking operations by first excavating an entry shaft, building the thrust block and concrete base, and setting jacking equipment. The process starts with pushing boxes while excavating at face, however, the movement of each box is achieved each time excavation at the shield is completed. Additionally, a pilot tube might be required in advance of box jacking operations. Box jacking projects often face schedule delays or loss of productivity due to inherent uncertainties in identifying unmarked underlying structures, type of soil and subsurface conditions. Although there are uncertainties in each and every construction project, management factors have a key role in reducing loss of productivity due to lack of prior investigations and/or improper planning and preparations including means and methods. The main objective of this study is to analyze productivity of box jacking operations, and make recommendations for improvements. To achieve goals of this thesis, a box jacking project was observed. Productivity data was collected and analyzed by MicroCYCLONE simulation and Method Productivity Delay Model (MPDM). While conclusions of this study showed it is possible to improve box jacking productivity, the cost may become major a factor when additional crews and equipment are selected. It should be noted that contractors and field personnel make resource decisions based on their past experiences which allow considerations for safety, productivity and costs. These issues are considered in this thesis while describing features of the case study project.
Author: David Langford
Publisher: John Wiley & Sons
ISBN: 0470680040
Category : Technology & Engineering
Languages : en
Pages : 258
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Book Description
This book reviews the general theory of strategy, relates it to the particular circumstances of the construction industry, and shows how it can be applied in practice. It brings together ideas from economics, marketing, management, business and politics to develop strategic management for both contractors' firms and the associated professions. Substantial changes have occurred in the industry since the book was first published in 1991. This Second Edition reflects the major developments that have followed the Latham and Egan reports, and includes new chapters on international strategy and marketing, showing how they can contribute to the strategic planning of construction organizations. The book will provide a valuable tool for the strategic development of construction firms. "Ten years separate the editions during which period a significant number of British, (and other), construction firms which had survived generations of proprietors merged, changed beyond recognition or ceased trading. One can not but wonder if publication of a work on strategic planning some twenty year earlier might have saved some of them." Construction Manager "The book presents the essential elements for managing at this higher level and should be a must for any construction professional who aspires to an executive position in industry as well as any student for construction management, project management and organizational management in construction. It comes highly recommended" Engineering, Construction and Architectural Management
Author: Tom Iseley
Publisher: Transportation Research Board
ISBN: 9780309060219
Category : Technology & Engineering
Languages : en
Pages : 88
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Book Description
This synthesis will be of interest to geologists; geotechnical, construction, and maintenance engineers; other state department of transportation (DOT) personnel involved with the planning, design, and permit issuance for conduits beneath roadways; local transportation agencies; utility contractors and consultants; and trenchless construction equipment manufacturers. It describes the current state of the practice for the use of trenchless technology for installing conduits beneath roadways. Trenchless construction is a process of installing, rehabilitating, or replacing underground utility systems without open-cut excavation. The synthesis is focused on trenchless technology for new installations. This report of the Transportation Research Board describes the trenchless installation technologies (methods, materials, and equipment) currently employed by state DOTs and other agencies to install conduits beneath roadways. The synthesis presents data obtained from a review of the literature and a survey of transportation agencies. For each technology identified, information is provided to describe the range of applications, basis for technique selection, site specific design factors to be considered, relative costs, common environmental issues, and example specifications. In addition, information on emerging technologies and research needs is presented.
Author: Bernhard Maidl
Publisher: John Wiley & Sons
ISBN: 3433601402
Category : Technology & Engineering
Languages : en
Pages : 372
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Book Description
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.
Author: James J. Swain
Publisher:
ISBN: 9780780307971
Category : Digital computer simulation
Languages : en
Pages : 1444
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Author:
Publisher:
ISBN: 9781622701070
Category :
Languages : en
Pages :
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Book Description
The Cal/OSHA Pocket Guide for the Construction Industry is a handy guide for workers, employers, supervisors, and safety personnel. This latest 2011 edition is a quick field reference that summarizes selected safety standards from the California Code of Regulations. The major subject headings are alphabetized and cross-referenced within the text, and it has a detailed index. Spiral bound, 8.5 x 5.5"
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 140
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Book Description
Backpacker brings the outdoors straight to the reader's doorstep, inspiring and enabling them to go more places and enjoy nature more often. The authority on active adventure, Backpacker is the world's first GPS-enabled magazine, and the only magazine whose editors personally test the hiking trails, camping gear, and survival tips they publish. Backpacker's Editors' Choice Awards, an industry honor recognizing design, feature and product innovation, has become the gold standard against which all other outdoor-industry awards are measured.
Author: Carl Patton
Publisher: Routledge
ISBN: 1317350006
Category : Political Science
Languages : en
Pages : 481
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Book Description
Updated in its 3rd edition, Basic Methods of Policy Analysis and Planning presents quickly applied methods for analyzing and resolving planning and policy issues at state, regional, and urban levels. Divided into two parts, Methods which presents quick methods in nine chapters and is organized around the steps in the policy analysis process, and Cases which presents seven policy cases, ranging in degree of complexity, the text provides readers with the resources they need for effective policy planning and analysis. Quantitative and qualitative methods are systematically combined to address policy dilemmas and urban planning problems. Readers and analysts utilizing this text gain comprehensive skills and background needed to impact public policy.
Author:
Publisher:
ISBN:
Category : Railroad tunnels
Languages : en
Pages : 112
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