By Betheena Kae Unite
An earthquake-resistant bridge, the first of its kind in the Philippines, is now being constructed in Surigao del Norte to replace the badly-damaged Anao-aon Bridge in the province, the Department of Public Works and Highways (DPWH) announced Monday.
Anao-aon Bridge in San Francisco, Surigao del Norte, collapsed when the province was hit by the 6.7-magnitude quake in February 2017.
A portion of the bridge that connects Surigao City to the towns of San Francisco and Malimono was badly damaged and even became the image of the devastation of the strong quake. Since then, it was temporarily restored as a one-lane bailey bridge.
The agency said the new Anao-aon Bridge will feature a world-renowned design employing an advance and modern technology in bridge construction utilizing corrugated steel plates (CSP) as primary material for the support structure which was proven to make bridges earthquake-resistant.
The construction of the first phase of the project, which includes the procurement of materials and building of the foundation, started in April 2018 and is now 85.51-percent completed. Around P180 million was spent on this stage of the construction, the department said.
DPWH-Caraga has already requested augmentation, estimating up to more than P75 million to ultimately complete the bridge with the remaining works which include the installation of CSP, backfill, and concrete slab as a carriageway.
According to the DPWH, the capability of CSP has passed the DPWH standards in upgrading the construction technology through the adoption of innovative technologies.
“The said material will soon be utilized in most of the department’s infrastructure projects for highways, bridges and airports. DPWH is also eyeing its feasibility for tunnel structures,” the department said.
CSP is a lightweight construction material that is economical as it cuts off the construction time because it is easier to install, it added.
Concrete bridges, according to the agency, are only expected to last 40 to 50 years while bridges built with CSP has a lifespan of 70 years.