ABSTRACT
The Central Luzon Link Expressway (CLLEx) is a four-lane expressway linking several existing expressways in the Central Luzon region of the Philippines to shorten the travel time between main cities, mitigating the severity of traffic congestion. To minimize interruptions to the local communities and economic activities, abutment embankments are constructed for overpass bridge structures. Geotechnical problems such as embankment instability and excessive post-construction settlements of the embankment were the primary concerns in the project. Among several ground treatment methods, geosynthetics solution was chosen by the Department of Public Works and Highways (DPWH) due to ease of construction and cost effectiveness. High stiffness geotextile is used as a basal reinforcement to enhance the embankment stability and bearing capacity. Prefabricated vertical drains (PVDs’) together with surcharge fills is used to accelerate the consolidation settlement of the soft foundation. This paper also discussed the construction sequences of the embankment.
