Stability Analysis of Underwater Pipeline Inter Island for Drinking Water

DOI

10.2991/icst-18.2018.84How to use a DOI?

Keywords

Drinking Water, Underwater Pipes, Sinking

Abstract

Indonesia is an archipelago with more than 17 thousand islands, both large and small islands. Some inhabited small islands do not have the potential of fresh water as a source of drinking water, so it needs special treatment in drinking water supply. Provision of drinking water with high technology such as reverse osmosis (RO) is often an obstacle both in terms of investment and operations and maintenance. One technique that is effective in providing drinking water for uninhabited island is the installation of inter-island underwater drinking water pipes. Sub sea pipeline installation is one of the jobs that require careful calculation and method, considering this work is a complex job and has a high risk, both during the installation process and after installation. At the time of installation must use a safe method for workers and the pipe to be installed, while after installation is necessary the stability of the pipe so that the pipe is safe on the seabed, can withstand the strong currents of the sea and the wave effect for the pipe in the shallow area. In the installation of sub-sea pipelines, it is necessary to take into account some technical aspects that influence the waves, ocean currents, wind speed and depth and structure of the seabed. In the installation of underwater drinking water pipes, it is recommended to use a pipe type of High Density Polyethylene (HDPE) whose specifications are adapted to hydraulic studies taking into account the depth of the sea and water pressure in the pipe, while the weight and distance of the pipe weight concrete are also calculated based on the sea, the speed of the ocean currents, wave height and other technical factors related to pipe stability. The recommended pipe sizes for small islands are 110 mm in diameter and at least two or three lanes in anticipation of disturbance in one of the pipelines does not interfere with drinking water service on the destination island. The recommended weight of the ballast concrete is between 65 kg - 80 kg with a minimum concrete quality of K700, because this size is still possible to be manually installed with human power, so the distance between the concrete is arranged to obtain a safe pipe stability. Within a period of three months the concrete will be stable and safe from ocean currents because concrete has been bound to the ocean floor by marine biota, especially oyster shells.

Copyright

© 2018, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Wati Asriningsih Pranoto
AU  - Tri Suyono
PY  - 2018/12
DA  - 2018/12
TI  - Stability Analysis of Underwater Pipeline Inter Island for Drinking Water
BT  - Proceedings of the International Conference on Science and Technology (ICST 2018)
PB  - Atlantis Press
SP  - 403
EP  - 406
SN  - 2589-4943
UR  - https://doi.org/10.2991/icst-18.2018.84
DO  - 10.2991/icst-18.2018.84
ID  - Pranoto2018/12
ER  -