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Dredging Technology Quick Reference Guide
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Book Synopsis Dredging Technology Book 2 by : G. L. M. van der Schrieck
Download or read book Dredging Technology Book 2 written by G. L. M. van der Schrieck and published by . This book was released on 2021-10 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the 2021 issue of book 2 of my series on Dredging Technology. It is a compact reference manual for project engineers involved in large scale land and water projects. As a project owner or project engineer this kind of short reference books will help you in the field. The book describes a lot of relevant technical processes that determine the progress and profitability of your project. Subjects: -Basic Soil Mechanics -Basic Fluid Mechanics for Pumps and Waterjets. -Stability calculations for Pontoons -Optimising large scale Pump Process -Basic Electric Theory and practical applications -Production of large scale floating Equipment -Loading a Trailing Suction Hopper Dredge
Book Synopsis Dredging Technology Quick Reference Guide by : G. L. M. van der Schrieck
Download or read book Dredging Technology Quick Reference Guide written by G. L. M. van der Schrieck and published by . This book was released on 2020-07-08 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: This reference guide is nr 2 of a series about Dredging Technology and it contains the basic theories and formula's a project engineer needs when acting in the field of dredging projects. It serves as a quick and compact reminder of theories and formulas he needs during preparation, excecution and possibly the handling of a claim during dredging project. The guide is compact and meant to be used on-site. The emphasis of this guide lies on quickly reminding the subjects and being able to quantify the parameters involved. However should there be a need for a more extensive description than a refer is made to the authors tectbook "Dredging Technology". This guide starts with the basic soilmechanic concepts and formulas which are relevant for any dredging project, such as: Soil stability (retaining walls and quick sand condition) , compaction and dilatancy (slope stabilty and cutting forces) . Next the basic fluid mechanic parameters , such as concentration and density, for pumping soil and water are described and also the parameters of waterjets . Formula's for Pump production calculation and Degree of Loading of a Hopperdredge are given. The stability of a pontoon, often used on a dredging project, is explained and formula's for the calulation of the metacenterheight are described. A compact description of theories of a centrifugal dredge pump is given together with a description of the pump drive. Especially the specific impact on a centrifugal pump characteristic by a diesel drive is explained. The effect of the pipeline length on the working point and therefore on the effectiveness of the diesel drive is explained.The effect of a change in the pump impellar diameter or a change in the gear ratio is also explained. These are real practical problems on a dredging project and therefore a general procedure for solving a pump question is given. The suction process with the vacuum and the limiting vacuum and cavitation at the pump entrance is described. This is the most important part of the hydraulic transport process, since it is the starting point of the soil volume production in cubic meter per hour when using a suction dredger. The vacuum production is analysed resulting in an optimisation of the suction production.A compact description of electric generator and motor is given and the difference between DC and AC is explained. The three phase alternating current motor is explained and also the principle of the "Electrical Shaft" is explained.Finally production calculation formula's are given for a cutter suction dredger (CSD) and a trailing suction hopper dredger (TSHD).
Book Synopsis Dredging Technology Book 2 by : Gerard Van Der Schrieck
Download or read book Dredging Technology Book 2 written by Gerard Van Der Schrieck and published by . This book was released on 2020-09-16 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Quick Reference Guide: This reference guide is book 2 from a series of Dredging Technology related books and contains the basic theories and formula's a project engineer needs when acting in the field of dredging projects. It serves as a quick and compact reminder of theories and formulas he needs during preparation, excecution and possibly the handling of a claim during dredging project. The guide is compact and meant to be used on-site. The emphasis of this guide lies on quickly reminding the subjects and being able to quantify the parameters involved. However should there be a need for a more extensive description than a refer is made to the main textbook "Dredging Technology". This guide starts with the basic soilmechanic concepts and formulas which are relevant for any dredging project, such as: Soil stability (retaining walls and quick sand condition), compaction and dilatancy (slope stability and cutting forces) . Next the basic fluid mechanic parameters, such as concentration and density, for pumping soil and water are described and also the parameters of waterjets . Formula's for Pump Production calculation and Degree of Loading of a Hopperdredge are given. The stability of a pontoon, often used on a dredging project, is explained and formula's for the calulation of the metacenterheight are described. A compact description of theories of a centrifugal dredge pump is given together with a description of the pump drive. Especially the specific impact on a centrifugal pump characteristic by a diesel drive is explained. The effect of the pipeline length on the working point and therefore on the effective use of the diesel drive is explained.The effect of a change in the pump impellar diameter or a change in the gear ratio is explained. These are real practical problems on a dredging project and therefore a general procedure for solving a pump question is given. The suction process with the vacuum and the limiting vacuum and cavitation at the pump entrance is described. This is the most important part of the hydraulic transport process, since it is the starting point of the soil volume production in cubic meter per hour when using a suction dredger. The vacuum production is analysed resulting in an optimisation of the suction production. A compact description of an electric generator and motor is given and the difference between DC and AC is explained. The three phase alternating current motor is explained and also the principle of the "Electrical Shaft" is explained. Finally production calculation formula's are given for a cutter suction dredger (CSD) and a trailing suction hopper dredger (TSHD).
Book Synopsis Quick Reference Guide by : G L M Van Der Schrieck
Download or read book Quick Reference Guide written by G L M Van Der Schrieck and published by Independently Published. This book was released on 2020-12-09 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is nr 2 of a series on Dredging Technology. As a Reference Guide the book contains the basic theories and formula's that a project engineer needs to know when he is involved in Dredging Projects as a Client or Contractor. It is a quick and compact reminder of theories and formulas relevant for project preparation, - execution and handling of possible claims. For a more extended and broad insight reference is made to the authors main text book "Dredging Technology Book 1". This guide covers the following subjects: Basic soil mechanics relevant for any dredging project: Soil stability of retaining walls and quick sand condition. Compaction and Dilatancy governing slope stability and cutting forces .Basic Fluid Mechanics: Concentrations and Density when pumping soil and water Parameters of water jets . Formula's for pump production calculations such as Degree of Loading of a Hopper-dredge The stability of a pontoon and calculation of the metacentre height.Theory of a Centrifugal Dredge Pump and the effect of the pump drive. Impact of a diesel drive on a centrifugal pump characteristic. Effect of the pipeline length on the working point and effectiveness of the drive. Effect of a change in the pumpimpellar diameter or a change in the gear ratioThe suction process, the vacuum, the limiting vacuum and cavitation at the pump entrance This is the most important part of the hydraulic transport process when using a suction dredger, since it is the starting point of the soil volume production in cubic meter per hour The vacuum production is analysed resulting in an optimisation of the suction production.A compact description of the electric generator and motor. Difference between DC and AC. The three phase alternating current motor and the principle of the "Electrical Shaft"Production formula' s for a cutter suction dredger and a trailing suction hopper dredger.
Book Synopsis Dredging Technology Book 1 by : G. L. M. Schrieck
Download or read book Dredging Technology Book 1 written by G. L. M. Schrieck and published by . This book was released on 2020-10-05 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book 1 is the 436 page main book of a series of books on Dredging Technology. The book is written by an expert in Dredging Technology Engineering who was a senior member for many years of the user panel of the Joint Dredging Research Project at Delft Hydraulics and Delft University.The book is based on the Lecture Notes of his Master Course CIE5300 Dredging Technology at Delft University. This course is built on the scientific results of the joint research project and the experience of the author in the dredging industry. The aim of the book is to give a broad insight in the many aspects of Dredging Projects, such as the Use and Production Optimalisation of the Dredging Equipment , The Cost Estimating and Survey aspects such as Positioning , Depth control and Tolerances. For better understanding of the possibilities and limits of the Dredging Production also basic processes are described such as: The Excavation of Sand, Clay and Rock and processes such as The Hydraulic Lift and Transport of Soil Water Mixtures and The Erosion and Deposition of Sand . For each of these Processes the Scientific Background is given and practical formulas are derived to use in a design procedure. Based on this insight the use of different Dredgers , such as the Cutter Suction Dredger and the Trailing Suction Hopper Dredge , in terms of Capacity, Workability and Tolerances, is given.There is an extensive glossary at the end of the book providing a quick way to find relevant information on different subjects. Most chapters give a rather complete description of their subject and are therefore also separate published as a small pocket A5 size paperback and Ebook. This enables the reader in spe to buy a selective number of small books or ebooks of his personal choice of subjects.The books will serve the engineer as an expert reference for more technical insight and assist the communication when dealing with Operational and Contractual Issues such as Production , Design and Claims.
Book Synopsis Dredging Technology CIE5300 by : G. L. M. Schrieck
Download or read book Dredging Technology CIE5300 written by G. L. M. Schrieck and published by Independently Published. This book was released on 2020-12-10 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is used as Lecture Notes for todays Master Course CIE5300 Dredging Technology. The book is written by an expert in Dredging Technology Engineering who was a senior member for many years of the user panel of the Joint Dredging Research Project at Delft Hydraulics and Delft University. The book is based on his Lecture Notes during his Master Course CIE5300 Dredging Technology at Delft University. This course is built on the scientific results of the joint research project and the experience of the author in the dredging industry. The aim of the book is to give a broad insight in the many aspects of Dredging Projects, such as the Use and Production Optimalisation of the Dredging Equipment , The Cost Estimating and Survey aspects such as Positioning , Depth control and Tolerances. For better understanding of the possibilities and limits of the Dredging Production also basic processes are described such as: The Excavation of Sand, Clay and Rock and processes such as The Hydraulic Lift and Transport of Soil Water Mixtures and The Erosion and Deposition of Sand . For each of these Processes the Scientific Background is given and practical formulas are derived to use in a design procedure. Based on this insight the use of different Dredgers , such as the Cutter Suction Dredger and the Trailing Suction Hopper Dredge , in terms of Capacity, Workability and Tolerances, is given.There is an extensive glossary at the end of the book providing a quick way to find relevant information on different subjects.
Book Synopsis Dredging Technology by : G. L. M. Schrieck
Download or read book Dredging Technology written by G. L. M. Schrieck and published by . This book was released on 2020-07-03 with total page 435 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is nr 1 of a series about Dredging Technology. The author ir G.L.M. van der Schrieck has been a researcher in the Dutch Dredging Industry from 1978 to 2015. After starting his working career in 1978 at the Delft Hydraulics Institute he joined HAM Dredging in 1981 as a research engineer till 1988 and from there as Chief Research Officer till 2000. From 2000 until his retirement in 2015 he acted as a freelance research consultant giving master dredging courses at the Delft University and acting as secretary of the Joint Dredging Research Program ordered by the Dutch Dredging Companies. During that period, he wrote this book as a basic guide for master students following his course on Dredging Technology. The contents of the book can be summarised as: " The dredging process, such as excavating, lifting, transporting and depositing spoil and the scientific background to these processes. The possibilities of dredging for the execution of major civil engineering projects." After a general introduction, the application and use of dredgers is described in terms of capacities, workability and tolerances. An overview of dredging projects and the basic Dredging Processes is given and their scientific backgrounds are explained, such as: mechanical cutting of sand clay and rock and hydraulic breaching and erosion of sand. Followed by the suction and discharge processes using diesel and electric driven dredge pumps. Special attention is given to pipeline transport theory and the interaction between pipeline and pump. The process of deposition of the dredged materials in a Hopperdredge or in a reclamation area or hydraulic fill are being explained. The Relationship between soil properties and dredging processes is described together with soil classification and geophysical soil survey methods. Special attention is given to survey subjects such as positioning and depth measurement methods and the calculation of paid and unpaid dredging depth and the dredged volumes. Finally, some special subjects are treated in this book: The Dry Tons Production Measurement System; Tolerances and dredging depth probability distributions; Cost estimate of dredging projects. In the last chapter the book provides the reader with an extensive English-Dutch and Dutch-English glossary of all terms, items, theories, processes, practices and sorts of equipment being used in the dredging industry. As a result, the book supports project engineers from both the contractor as from the client, giving them a solid reference for the technical communication inside their own organisation as well between the client and contractor when dealing with contract issues and claims during dredging projects.
Book Synopsis Dredging Technology Book 2 by : Gerard Schrieck
Download or read book Dredging Technology Book 2 written by Gerard Schrieck and published by . This book was released on 2020-09-12 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: This reference guide contains the basic theories and formula's a project engineer needs when acting in the field of dredging projects. It serves as a quick and compact reminder of theories and formulas he needs during preparation, excecution and possibly the handling of a claim during dredging project. The guide is compact and meant to be used on-site. The emphasis of this guide lies on quickly reminding the subjects and being able to quantify the parameters involved. However should there be a need for a more extensive description than a refer is made to the authors tectbook "Dredging Technology". This guide starts with the basic soilmechanic concepts and formulas which are relevant for any dredging project, such as: Soil stability (retaining walls and quick sand condition) , compaction and dilatancy (slope stabilty and cutting forces) . Next the basic fluid mechanic parameters , such as concentration and density, for pumping soil and water are described and also the parameters of waterjets . Formula's for Pump production calculation and Degree of Loading of a Hopperdredge are given. The stability of a pontoon, often used on a dredging project, is explained and formula's for the calulation of the metacenterheight are described. A compact description of theories of a centrifugal dredge pump is given together with a description of the pump drive. Especially the specific impact on a centrifugal pump characteristic by a diesel drive is explained. The effect of the pipeline length on the working point and therefore on the effectiveness of the diesel drive is explained.The effect of a change in the pump impellar diameter or a change in the gear ratio is also explained. These are real practical problems on a dredging project and therefore a general procedure for solving a pump question is given. The suction process with the vacuum and the limiting vacuum and cavitation at the pump entrance is described. This is the most important part of the hydraulic transport process, since it is the starting point of the soil volume production in cubic meter per hour when using a suction dredger. The vacuum production is analysed resulting in an optimisation of the suction production.A compact description of electric generator and motor is given and the difference between DC and AC is explained. The three phase alternating current motor is explained and also the principle of the "Electrical Shaft" is explained.Finally production calculation formula's are given for a cutter suction dredger (CSD) and a trailing suction hopper dredger (TSHD).
Book Synopsis Chapter 6: Settling Sand in a Hopper Dredge by : G. L. M. van der Schrieck
Download or read book Chapter 6: Settling Sand in a Hopper Dredge written by G. L. M. van der Schrieck and published by . This book was released on 2020-11-18 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is derived from chapter 6 from my main book `Dredging Technology Book 1`. In order to keep track of things the section and formula numbers are kept the same with the prefix 6. The Trailing Suction Hopper Dredger (TSHD) is the mayor workhorse of the modern Dredging Industry. During the last decades the load capacity of a single dredger has been increased to over 30-40 thousand cubic meters. This increase of scale kept the price per cubic meter low and thus enabled large scale projects such as: Chek Lap Kok Hong Kong Airfield , Dutch Beach Replenishment Program and the Maasvlakte 2 Rotterdam Harbour Extension. The sand production of a TSHD not only depends on the load capacity of the ship but also on the suction capacity of the pumps and dragheads. This is especially the case if there is a short transport distance making the suction time the mayor part of the whole cycle. However, there is one more important production factor: the settling velocity of the sand in the Hopper. To give you an idea of the problem: When the average grainsize of the sand is as low as 100 microns or less most of the sand will not even settle in the hopper but will flow direct overboard as soon as the overflow level has been reached. In this case one better stop the suction process when the overflow level has been reached and start sailing.The first part of is book explains how to optimize the cycle production of the TSHD. The use of a variable overflow height is described. Also the difference in optimizing between a cycle with a dump of the load and a cycle using the self emptying pumpsystem is explained. The second part deals with explaining and define the relevant parameters like : Restload, Loading rate, Degree of loading , Overflow loss, Hopper load parameter, Grain fall velocity , Hindred settling, Constant tonnage or volume system, Hopper design. From these the Hindred settling caused by the near bed sand concentration is one of the most important phenomena to reckon with. As shown above it is of great importance to know in advance what the max settling rate and overflow loss will be during the loading phase of a cycle. Therefore the last part of this book describes the development over the last decades of the "insight" in this settling process. It is amazing to see what completely different sedimentation models have been suggested over the years ! Lucky for us the large scale tests in the PhD promotion research carried out by prof. ir. C. van Rhee gave a very clear and well proven description of what really happens in the hopper. Moreover , his computational model resulted in an easy to handle correlation formula for the estimation of the overflow loss.
Book Synopsis Handbook of Dredging Engineering by : John B. Herbich
Download or read book Handbook of Dredging Engineering written by John B. Herbich and published by McGraw Hill Professional. This book was released on 2000 with total page 1522 pages. Available in PDF, EPUB and Kindle. Book excerpt: Authoritative, up-to-date guide to dredging theory and practice. From selecting the right equipment, to evaluating environmental impact, to bidding on a project, Handbook of Dredging Engineering, Second Edition, is the last word on modern hydraulic dredging. Edited by John B. Herbich, with contributions by well-know experts in the field, the Handbook examines basic fluid mechanics; dredge pumps; dredging equipment; sediment; pipeline transport of solids; dredging methods; disposal and placement of dredged material; numerical models for predicting the fate of dredged material placed in open water; environmental effects of dredging activities; instrumentation and automation; and project planning. This vital new edition covers major advances made over the last seven years. Three chapters are new to this edition: numerical models for predicting the fate of dredged material...subaqueous capping of contaminated sediment...and removal of contaminated sediments by dredging, with illustrative case studies.
Book Synopsis Dredges and Dredging by : Charles Prelini
Download or read book Dredges and Dredging written by Charles Prelini and published by . This book was released on 1912 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dredging written by Denis Yell and published by Thomas Telford. This book was released on 1995-10-06 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: This guide highlights the particular problems of excavating from underwater sites, and describes the methods and equipment developed to overcome them. All the stages of dredging are considered, from project design specification and site investigation, to supervision of the actual dredging works.
Book Synopsis Dredging Technology Book 3 by : Gerard Van Der Schrieck
Download or read book Dredging Technology Book 3 written by Gerard Van Der Schrieck and published by Independently Published. This book was released on 2020-09-16 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: This third book of my "Dredging Technology " series contains a selection of hydraulic subjects also covered in my main book "Dredging Technology" . The reason for publishing these subjects in a separate book is to make them separately available at a lower price to the public of Civil Engineers. Besides theory of waterjets and waterjetpumps the book describes the possibilities for scaling hydraulic and soil mechanical processes, such as underwater excavation, lift, transport and deposit of sand, clay and rocks or stones and the scientific background of the scaling rules for each of these processes.For the formulas used for these processes reference is made to the previous sections and chapters of the main book "Dredging Technology". The theories for waterjets and waterjetpump are reviewed in the first two sections of the book. In the third section of the book the concepts of Scale Modelling such as Similarity, Scaling Effects, Scaling Factors and Scaling Rules are being explained. Also the concept of Geometric similarity and Dynamic Similarity and the use of Dimensionless Indicators is explained. The application of the Scale Modelling Technique is shown for the following under water processes:1) Settling of grains and/or stones 2) Breaching Sand 3) High speed Pick-up and erosion of sand 4) Discharging sand under water / slope instability by water overpressure 5) Sand cutting under water 6) Cutting clay. Also some examples of scale tests with Dredgers are given:1) Mixing process of coarse material in a rotary cutterhead 2) Breaching of the sand load in a trailing suction hopper dredger using water jets. More than one scenario is given: A) Using prototype sand or B) Modelling headwall velocity at Froude scale 3) Mixture formation in a rotary cutterhead in (plastic) clay. Here also two scenario's are given: A) Investigation of the possibilities for the mixture of clay or B) Investigation of cutting forces in clay.
Book Synopsis Fundamentals of Hydraulic Dredging by : Thomas M. Turner
Download or read book Fundamentals of Hydraulic Dredging written by Thomas M. Turner and published by Cornell Maritime Press/Tidewater Publishers. This book was released on 1984 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Civil Engineer Trailing Suction Hopper Dredger by : G. L. M. Schrieck
Download or read book Civil Engineer Trailing Suction Hopper Dredger written by G. L. M. Schrieck and published by . This book was released on 2021-01-26 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is derived from chapter 2.2 of the main book :"Dredging Technology Book 1: The basics"It is a compact reference to the Trailing Suction Hopper Dredger (TSHD) for Civil Project Engineers involved in Dredging Projects.A broad description of the vessel is given and a lot of practical guidelines for the optimal use of the TSHD. It is the 2nd sailing workhorse of the Dredging Industry, just beyond the CSD, having multiple discharge modes among them the unique self emptying capacity that enables the nowadays very large reclamation projects. Dragheads and suction tube and pump installation are being discussed.Working methods and loading and unloading systems are being discussed and also the limitations and international loading rules are described.
Book Synopsis Scale Modelling The Dredging Process by : G L M Van Der Schrieck
Download or read book Scale Modelling The Dredging Process written by G L M Van Der Schrieck and published by . This book was released on 2021 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers Chapter 13 of: "Dredging Technology Book1: The Basics" In the underwater hydraulic engineering one often needs more insight in the underwater processes. A very good way to gain this insight is performing relatively cheap small scale tests in clear trough visible water. These tests will help finding solutions for better working methods. Watching the underwater processes and knowing the scale factors will give you a good picture of your problem and will help you finding /discovering a solution or even a break trough. The best way to convince you is the following example: . A contractor used a large diameter water jet with a nozzle mounted on the drag head of a large trailing suction hopper dredge. Sailing slowly ahead with the nozzle just above the bottom the aim was to erode a trench in the sand by jetting about 90 degrees top view side wards and 30-45 degrees vertically down into the sand bottom. The premise was the jet would erode the sand to the desired trench depth and the jet would discharge the sand side wards away from the trench. A simple test in a small fish aquarium having a sand bottom and clear water using a horizontal moving water jet attached on the laboratory mains showed a completely different picture! The water jet appeared to dig indeed into the sand but did not transport the sand out of the trench. Instead the jet stayed in a narrow sleeve as wide as the jet diameter and the jet beam stayed in this sleeve 90 degrees backwards opposite of the sailing direction. So in fact the water jet stayed in the plane in the shade of the water jet. Shortly after the passage of the jet the sand on top of the sleeve fell down in the sleeve and most of the eroded sand stayed in the "trench" ! The result was a very limited trench depth. Clearly this wasn't the right working method. I hope this story convinces you to make use of the small scale modelling technique.
Book Synopsis A Guide to Cost Standards for Dredging Equipment 2009 by : R. N. Bray
Download or read book A Guide to Cost Standards for Dredging Equipment 2009 written by R. N. Bray and published by CIRIA. This book was released on 2009 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
