Composites Geocontainment Systems for Riverbank Protection

Project Data

Project	Composites Geocontainment Systems for Riverbank Protection
Location	Tanjung Manis, Malaysia.
Owner	N/A
Products used	Geotube® Systems, Sand Filled Mattresses

Overview

Rajang River (or Rejang River) originates in the Iran Mountains in Borneo Island, then flows southwest to Kapit where it turns westward to finally discharge over a swampy delta into South China Sea. With a 560 km course, the Rajang in Sarawak is located river in Malaysia. The port of Tanjung Manis on the Rajang is located about 30 km from the sea; and has a container terminal; a deep sea fishery wharf and facilities complex; and an oil, gas and chemical (OGC) jetty.

The OGC jetty expansion project is designed to have 2 berths, each 200 m long with 12m draught to cater for larger vessels. The project also included bank protection works.Rock is not readily available nearby and site access is difficult. Geotube® GT550MC composites tubes and sand filled Geomattress were used to protect riverbank adjacent to the jetty. Vegetation can take a long time to be established naturally and turfing will not sustain in these brackish water environment. The composite fabric used for the fabrication of the Geotube® and Geomattress units is extremely robust and has the ability to entrap sediment within the fabrics structure. The net result are Geotube® Systems that not only is stable against current and waves but can also withstand weathering and sunlight exposures over the long term.

Standard Geotube® GT550MC units of 10.8 m in circumference and 25 m in length were used as to establisation units. Scour apron is installed in front of the Geotube® GT550MC units. After the Geotube® GT550MC units are installed, the riverbank is gently slopped back. Sand filled Geomattress SFM 2000C are then installed above the Geotube® GT550MC units.