The Metro Manila Development Authority on Friday announced the closure of Ayala Bridge in Manila starting this weekend for the road maintenance work to be conducted by the Department of Public Works and Highways and its private partner.
In its advisory, the MMDA said the full closure of Ayala Bridge for repair works, damper installation and concreting is scheduled beginning 10 p.m. of Oct. 9 to 5 a.m. Oct. 12; Oct. 16 to 19 (10 p.m.-5 a.m.), Oct. 23 to 26 (10 p.m.-5 a.m.), and Oct. 30 to Nov. 2 (10 p.m.-5 a.m.).
On Oct. 15, the outer lane of the bridge for each direction will be open to light vehicles only.
Areas to be affected by the bridge closure include major thoroughfares such as Quezon Boulevard, United Nations Avenue, Taft Avenue, Legarda Street, Quirino Avenue, Recto Avenue, Magsaysay Boulevard, and Roxas Boulevard.
Motorists may take the following alternate routes:
Going southbound toward Otis or President Quirino Avenue:
From Magsaysay Boulevard, Legarda Street and Lacson Avenue, use Nagtahan or Mabini Bridge, turn right at M. Guanzon Street, go straight toward UN Avenue and onward to destination.
From P. Casal Street, turn right on Carlos Palanca Road going to McArthur Bridge and onward to destination.
From Romualdez Street, turn left on Ayala Boulevard, right on Taft Avenue, and straight to Quezon or Jones Bridge onward to destination.
DPWH Secretary Rogelio Singson said they need to close the bridge in the next four weekends of October for the post-tensioning and damper installation works.
He added that the bridge is expected to be fully opened to vehicles by Nov. 2, 2015 after the completion of post tensioning activities, a method of introducing internal forces or stress to the high strength steel or cables after the concrete placement.
Singson noted that after the construction related activities on top of the bridge are completed, vehicular movement will be allowed as remaining works such as welding and sandblasting will be done under the bridge that will be completed on Dec. 23, 2015.
The 139-lineal meter bridge with a total superstructure width of 25 was lifted by 70 centimeters for freeboard clearance of navigating vessels along Pasig River.
The lifting of the bridge, first in the Philippines, started last April 22 utilizing heavy lifting system, which is being used to lift bridges, buildings and other structures worldwide.
In the past, Ayala Bridge was susceptible to damage from passing barges and tugboats because of limited freeboard clearance and also at serious risk from seismic or earthquake forces inasmuch as it was subjected to major repair 58 years ago (1957).
The four-lane steel truss-type Ayala bridge will be earthquake-resistant after two (2) seismic engineering tools namely the high-damping rubber bearing and base isolation were utilized at the bridge rehabilitation project.
Singson explained that the installation of high-damping rubber (HDR) bearings will allow the bridge to absorb energy in case of lateral earthquake by transforming energy to heat while the use of base isolators is intended for the bridge to survive a devastating seismic impact by dividing the bridge’s fixed connections to substructures and placing roller bearing on sides of the bridge to make way for movement.
The DPWH is upgrading the structural integrity of Ayala Bridge, which will also elevated for 1.75 meters to give more space for barges passing the Pasig River.
The rehabilitation and repair of the bridge started in May last year.