8 The core and underlayers of a rubble-mound structure

1984 ◽  
pp. 99-106 ◽  
Author(s):  
T. S. Hedges
Keyword(s):  
The Core ◽  
Mound Structure ◽  
Rubble Mound

scholarly journals STABILITY OF RUBBLE MOUND SLOPES UNDER RANDOM WAVE ATTACK

1984 ◽  
Vol 1 (19) ◽  
pp. 176 ◽  
Author(s):  
J.W. Van der Meer ◽  
K.W. Pilarczyk
Keyword(s):  
Model Tests ◽  
Wave Period ◽  
Present Series ◽  
Random Wave ◽  
Research Project ◽  
Spectrum Shape ◽  
The Core ◽  
Practical Design ◽  
Relevant Variables ◽  
Rubble Mound

The objective of the present research project is to give new practical design formulae for rubble mound slopes under random wave attack. The study is based upon a series of model tests. More than two hundred tests have been performed in order to vary systematically all the relevant variables. The main shortcomings in Hudson-type formulae have been solved as a result of the present series of investigations. Stability formulae are given which include the influence of wave period, number of waves, armour grading, spectrum shape, groupiness of waves and the permeability of the core.

scholarly journals Investigation on the Reflection Coefficient for Seawalls Protected by a Rubble Mound Structure

2021 ◽  
Vol 9 (9) ◽  
pp. 937
Author(s):  
Luigi Pratola ◽  
Antonio Rinaldi ◽  
Matteo Gianluca Molfetta ◽  
Maria Francesca Bruno ◽  
Davide Pasquali ◽  
...  
Keyword(s):  
Reflection Coefficient ◽  
Wave Reflection ◽  
Experimental Tests ◽  
Coastal Protection ◽  
Empirical Formulas ◽  
New Approach ◽  
Wave Flume ◽  
Mound Structure ◽  
Rubble Mound ◽  
Rubble Mound Breakwaters

Sea wave reflection from coastal protection structures is one of the main issues in the coastal design process. Several empirical formulas have been proposed so far to predict reflection coefficient from rubble mound breakwaters and smooth slopes. The aim of this study is to investigate wave reflection from a rubble mound structure placed in front of a vertical concrete seawall. Several experimental tests were performed on a two-dimensional wave flume by reproducing on a rubble mound structure with a steep single primary layer armored with a novel artificial unit. A new approach for the prediction of the reflection coefficient based on dimensional analysis is also proposed, and a new empirical equation is derived. The performance of the proposed equation was compared with widespread existing formulas, and a good accuracy was found.

scholarly journals BREAKWATER WITH A SARD BITUMEN COEE

1980 ◽  
Vol 1 (17) ◽  
pp. 131 ◽  
Author(s):  
E. Loewy ◽  
K.G. Witthaus ◽  
R.J. Maddrell ◽  
J.P. Wood
Keyword(s):  
Warm Water ◽  
Core Material ◽  
Power Station ◽  
Wave Overtopping ◽  
The Core ◽  
Impermeable Barrier ◽  
Unique Method ◽  
Rubble Mound

Sand bitumen was used in the core of a rubble mound breakwater to form an impermeable barrier, essentially to inhibit the recirculation of warm water exhausted from a power station outlet back into the intake pumps. The core had a secondary advantage in permitting the placing of bitumen grouting to the rock on the lee face of the breakwater to stabilise it against wave overtopping. The paper describes the reasons which led to the adoption of this unique method on a very exposed coastline. It also outlines some of the measured properties of the sand bitumen and the methods used and experience gained in its mixing and placing. The sand bitumen, which has not to our knowledge been used for this purpose and as a core material previously, is proving to be successful.

MODELING OF MODELS ON FAILURE MODES OF CAISSON - RUBBLE MOUND STRUCTURE IN 1G FIELD TESTS

2021 ◽  
Vol 77 (2) ◽  
pp. I_769-I_774
Author(s):  
Tatsuya MATSUDA ◽  
Tatsuya UEDA ◽  
Kentaro TAMURA ◽  
Naoto NAITO ◽  
Naoki KUWABARA ◽  
...  
Keyword(s):  
Failure Modes ◽  
Field Tests ◽  
Mound Structure ◽  
Rubble Mound
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