Debris Flow Barriers

Discovery Bay is a high-end mixed development situated on Lantau Island, New Territories Region. It is privately developed by Hong Kong Resorts Co. Ltd. (HKR) since 1982. Prior to rapid development at Discovery Bay, the existing terrain is mountainous and there has been incidents of debris flow recorded in the past, near to the development area. To address possible debris flow safety concerns, interception structures on hill slopes shall be provided to capture loose debris, safeguard infrastructure and lives in the event of landslip. HKR has awarded the construction works package for the Discovery Bay North Development to China State Construction Engineering (HK) Ltd (CSCE). For the scope of debris flow barrier design, supply and construct, CSCE engaged G And E Co. Ltd. (G&E) as the specialist contractor to come up with the solution which meets the authorities requirements. Rockfall simulations has been performed and the impact energy identified for open hill slope debris flow is 2,000kJ and channelized debris flow is 5,000kJ. The fence will be located near to the coast, beside Sam Pak Wan Bay, hence needs to be able to withstand salt spray attack.

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Lake Komani in Bajram Curri, Albania, was constantly threatened by debris flow from Lerini-Salca stream, growing this way the water level in the lake and giving the dam additional and artificial charges, also separating the lake in two parts. The strong water flows generated this way were creating difficulties for the ship which sail in the lake.

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The Department of Highways (DOH) - Chaiyaphume Bureau had sanctioned a study to identify areas that poses debris and landslide hazards to road users along the Regional Highway Route 225 located in North-Eastern Thailand. This highway is approximately 256km long and traverses through the provinces of Chaiyaphum – Petchabun - Nakhon Sawan. A slope along KM109. 390 to KM110. 210 has been identified as high risk and the debris flow protection solution needs to be in place before the monsoon season approaches to safeguard the lives of road users and ensure uninterrupted highway traffic usage.

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