Author: John P. AhrensPublisher:
ISBN:
Category : Hydraulic models
Languages : en
Pages : 412
Book Description
Large Wave Tank Tests of Riprap Stability
Author: John P. AhrensPublisher:
ISBN:
Category : Hydraulic models
Languages : en
Pages : 412
Book Description
Large Wave Tank Tests of Riprap Stability
Author: John P. AhrensPublisher:
ISBN:
Category : Hydraulic models
Languages : en
Pages : 0
Book Description
Tests of riprap stability under wave attack were conducted at prototype scale in the large wave tank at the U.S. Army Coastal Engineering Research Center (CERC). Wave heights ranging from 1.4 to 6 feet and wave periods ranging from 2.8 to 11.3 seconds, were used. Three embankment slopes, 1 on 1.5, 1 on 3.5, and 1 on 5, were tested. The riprap stone was a diorite placed on the embankments by dumping. The median stone weights of the riprap ranged from 27 to 120 pounds. The study showed that wave period, because of its influence on breaker characteristics, has a significant effect on riprap stability. Wave conditions which produce the lowest riprap stability are predictable and are associated with a collapsing-type breaker.
Riprap Stability Scale Effects
Author: John P. AhrensPublisher:
ISBN:
Category :
Languages : en
Pages : 33
Book Description
This report is based on small-scale tests of riprap stability at a 1:10 (model:prototype) Froude scale, which replicate previous tests conducted in the large wave tank at the Coastal Engineering Research Center (CERC). The large wave tank tests used wave heights which exceeded 5 feet in some instances and can be regarded as protype scale. Scale effects were approximately 20 percent at the zero-damage level, and the small-scale tests gave more conservative estimates of zero-damage wave heights and wave runups than those predicted from prototype test values. However, for severe levels of damage the differences between small scale and prototype were not as great. When profile surveys of severely damaged riprap were compared, the small-scale and the prototype profiles were found to have similar shapes. Wave period was also found to have less influence on the zero-damage wave heights in the small-scale tests than in the prototype tests. The results of these tests were compared with studies conducted by Dai and Kamel (1969), Thomsen, Wohlt, and Harrison (1972), and the Hydraulic Research Station (1975).
Riprap Stability on Earth Embankments
Author: Arvid L. ThomsenPublisher:
ISBN:
Category : Embankments
Languages : en
Pages : 140
Book Description
Rock Movement in Large-scale Tests of Riprap Stability Under Wave Action
Author: Thorndike SavillePublisher:
ISBN:
Category : Embankments
Languages : en
Pages : 16
Book Description
Wave Period Effect on the Stability of Riprap
Author: John P. AhrensPublisher:
ISBN:
Category : Ocean waves
Languages : en
Pages : 17
Book Description
Test data on the stability of dumped quarry stone riprap to wave attack is presented and analyzed. The tests were conducted in the large two-dimensional wave tank at the Coastal Engineering Research Center (CERC) at near prototype scale. The test data show riprap stability changes with wave period with the lowest stability occurring at a period that creates a collapsing breaker. Methods to predict riprap stability and wave runup on riprap are developed and discussed. (Author).
Riprap Stability on Earth Embankments Tested in Large- and Small-scale Wave Tanks
Author: Arvid L. ThomsenPublisher:
ISBN:
Category : Embankments
Languages : en
Pages : 0
Book Description
Tests of models in wave tanks were made to determine the effectiveness of several riprap designs in protecting embankment slopes from wave action. Models ranging from about 1:20 scale to almost full scale were tested with waves up to about 6 feet high. A range of wave periods were tested, embankment slopes varied from 1 on 2 to 1 on 5, and armor layers were composed of quarried stone, glacial boulders and tribars. Relationships that define the effect of wave height, wave period, embankment slopes and Reynolds number on size of stable armor units were experimentally determined and are given in graphs and tables. (Author).
Overlay of Large, Placed Quarrystone and Boulders to Increase Riprap Stability
Author: Bruce L. McCartneyPublisher:
ISBN:
Category : Boulders
Languages : en
Pages : 42
Book Description
Technical Memorandum - U.S. Army Corps of Engineers, Coastal Engineering Research Center
Author: Coastal Engineering Research Center (U.S.)Publisher:
ISBN:
Category : Beach erosion
Languages : en
Pages : 1082
Book Description
Author: