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The first rockfall barrier in the Philippines is installed along the Wright-Taft-Borongan-Guian Road, Samar

drapery_Maccaferri

Maccaferri provided secured drapery, HEA panels and RMC050A rockfall barrier system

An ambitious program of road rehabilitation work in the Samar area involved several slope protection measures to help make the road more accessible and safer. Maccaferri Philippines provided its soil nailing system with Double Twist rockfall netting and high-energy absorption panels.

Samar is a province which has numerous hills, ravines and valleys. The Wright-Taft-Borongan-Guiuan Road is a secondary national road running between the townships of Wright in Western Samar and Guian in Eastern Samar. Located in the central Philippines (Visayas), the road is subject to harsh weather conditions and heavy rainfall during typhoons and tropical storms.

The Department of Public Works & Highways (DPWH) Central Office has implemented an ambitious program of road rehabilitation work in both Western and Eastern Samar. The development of the project is being funded by a finance grant from the Government of the United States.

The project involves several slope stabilisation and protection measures. The first stage is characterised by a soil nailing solution in conjunction with a rockfall barrier.

Based on the data provided by the client, Maccaferri recommended a secured drapery system using its double-twist rockfall netting and high-energy absorption (HEA) panels for the facing elements of the soil nailing system. These fascia meshes would enable the slope face to achieve a more environmentally-friendly, aesthetically pleasing profile by promoting the establishment of vegetation and protecting the slope against erosion. The meshes offer different technical characteristics (stiffness, puncture resistance, tensile strength) and were selected to suit the specific problems encountered.

The protection of road users was also of paramount importance, so the overall solution also incorporated a 500kJ rockfall barrier (RMC 050A) mounted on top of a 2 metre high concrete pedestal to act as a capture system for rocks which may detach from the slope above the areas protected by the HEA panels, drapery netting and soil nailing system.

Of particular note, is the fact that this project allowed Maccaferri Philippines to demonstrate the effectiveness and ease of installation of our RMC 050A rockfall barrier. As the first rockfall barrier installed in the Philippines, it was gratifying to hear both contractors and DPWH praise the barrier.

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