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Verhagen, Henk Jan
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Courseware
Design and construction of breakwaters and closure dams in estuaries and rivers. Functional requirements, determination of boundary conditions, spatial and constructional design and construction aspects of breakwaters and dams consisting of rock, sand and caissons. Overview and history of breakwater and closure dam construction. The general design principles of a breakwater and a closure dam. Determination of boundary conditions for dams and breakwaters, with special attention to the design frequency. Methods to determine the design wave height from wave statistics. Overview of other boundary conditions (geotechnical and hydraulic). Materials, quarries and rock properties. Various properties of the different types of dams and breakwaters, like stability of riprap in current and wave conditions, design of armour layer, natural rock and concrete elements. The use of caissons for breakwaters and closure dams. Computation of element size using classical formulae, partial safety coefficients and probabilistic methods. Plan and cross section of breakwaters. Practical examples of breakwaters and closure dams. Execution (marine or land based equipment) of the works. Failure mechanisms and (cost) optimisation. One-week exercise in which a group of two or three students has to design a breakwater and a closure dam.
- Subjects:
- Hydraulic Engineering
- Keywords:
- Tidal basins Breakwaters -- Design construction River channels Dams -- Design construction
- Resource Type:
- Courseware
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Courseware
Design of shoreline protection along rivers, canals and the sea; load on bed and shoreline by currents, wind waves and ship motion; stability of elements under current and wave conditions; stability of shore protection elements; design methods, construction methods. Flow: recapitulation of basics from fluid mechanics (flow, turbulence), stability of individual grains (sand, but also rock) in different type of flow conditions (weirs, jets), scour and erosion. Porous Media: basic equation, pressures and velocities on the stability on the boundary layer; groundwater flow with impermeable and semi-impermeable structures; granular filters and geotextiles. Waves: recapitulation of the basics of waves, focus on wave forces on the land-water boundary, specific aspects of ship induced waves, stability of elements under wave action (loose rock, placed blocks, impermeable layers) Design: overview of the various types of protections, construction and maintenance; design requirements, deterministic and probabilistic design; case studies, examples Materials and environment: overview of materials to be used, teraction with the aquatic environment, role of the land-water boundary as part of the ecosystem; environmentally sound shoreline design.
- Subjects:
- Hydraulic Engineering
- Keywords:
- Shore protection Coast defenses
- Resource Type:
- Courseware