ALABANG-SUSANA HEIGHTS EXPRESSWAY WIDENING PROJECT

The project is located in Muntinlupa City, adjacent to the Countryhomes Subdivision and directly beneath the South Luzon Expressway (SLEX). This area, densely populated and highly vulnerable, faced a growing geotechnical threat due to the ongoing expansion of the expressway. Construction activities triggered noticeable ground movement, raising concerns over slope instability. Without appropriate intervention, the site posed a serious risk of slope failure or landslide, potentially endangering the lives of residents, damaging homes, and disrupting vital infrastructure. To mitigate these threats and ensure the safety of the community, a comprehensive slope stabilization system was developed and implemented. The solution focused on soil nailing technology, enhanced by a suite of high-performance geotechnical products, each selected to meet the challenging site conditions and proximity to critical infrastructure.

The first key element, HEA Panels (High Energy Absorption Panels), was used for its exceptional strength and impact resistance. These panels are especially suited for high-risk zones near expressways, offering reliable structural support to the slope. Complementing this were DT Nets (Double Twisted Nets), which provided effective surface erosion and rockfall control. Their flexibility and durability made them ideal for conforming to the slope’s terrain while protecting against surface degradation. To further reinforce the slope, MacMat R1 822G0, a steel-reinforced geomat, was applied. This product integrates a three-dimensional erosion control mat with steel wire mesh, significantly improving the slope’s resistance to erosion and enhancing overall integrity when used in conjunction with soil nails. Together, these solutions formed an integrated protection system. The slope’s stability was restored, the threat of landslide mitigated, and the safety of the Country homes Subdivision residents safeguarded. Additionally, the infrastructure upgrade of SLEX was able to continue without further geotechnical complications, demonstrating a successful balance between development and community protection.