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Development of Rubble Mound Levelling Technique (Part-1) -Basic Characteristics of a Chute0type Rubble Mound Levelling Method-
| Publication year | Port and Airport Research Institute Technical Note 0423 1982.06 |
|---|---|
| Author(s) | Tadasu OKUDE,Hiroyuki YAMAYA,Kazuhiro SHIRAI |
| Department /Divison |
Machinery Division Working Craft Development Laboratory |
| Executive Summary | An experimental study was made to investigate the basic characteristics of a chute-type rubble mound levelling method. Levelling forces acting on chute, geometric configuration of levelled mound and mound porosity were measured through the model experiments, where the factors in vestigated were configuration of base mound, shape of chute, mound thickness to be levelled, chute travelling velocity and mound overlap rate. Experimental results were discussed by a parameter ψn, which was proposed to express the mound levelling conditions. It was recognized that horizontal levelling forces increased with a decrease of ψn. Levelled mound surface had a small roughness and the percentage of void in the levelled mound layer was 0.3 to 0.5. |
| PDF File | /en/pdf/en/no0423.pdf |
