Dredging Technology Book 3: Waterjet, Jetpump and Scale Modelling Soil Water Digging Processes

By ir. Gerard van der Schrieck

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 ejectorpumps the book also 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 ejectorpump 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.

• Format: Paperback
• Language: English
• ISBN: B08JB3KHXJ
• ISBN13: 9798686890701
• Release Date: September 2020
• Publisher: Independently Published
• Length: 40 Pages
• Weight: 0.26 lbs.
• Dimensions: 0.1" x 8.5" x 11.0"