STABILITY OF UNDERWATER STRUCTURE UNDER WAVE ATTACK
Abstract: Geotube is, among
others, a type of coastal structure that is increasingly accepted for coastal
protection especially underwater breakwater. Besides its relatively low cost,
it has other advantages such as flexibility, ease of construction and the fact
that it can be filled with local sand material. Similar to all other coastal
structures, it should also be stable under wave attack. A simple theoretical
approach based on linear wave was adopted to estimate the stability of such
structure. The theoretical solution was then compared with an experimental
study. The experimental study was conducted at the Hydraulics and Hydrology
Laboratory of Universitas Gadjah Mada. However, instead of a real geotube, PVC
pipe was used where the weight of the PVC was varied by adjusting the volume of
sand in the pipe. The result indicated that the agreement between the
theoretical solution and the experiment was encouraging. The analytical
solution may be utilized to predict underwater pipe stability under wave attack
with certain degree of accuracy.
Author: C. Paotonan, D. B.P.
Allo
Journal Code: jptsipilgg110033
