The two high- rise towers of PERLA MANSION were constructed over a podium built over a seven storeys underground basement The very deep basement was built using the TOP-DOWN Construction Technology carried by Foundation Specialists, Inc.. Cast In Place Reinforced Diaphragm Walls along the perimeter of the Basement were executed under Static Bentonite Suspension The three meters thick Reinforced Concrete foundation slab was cast on solid rock Foundation Specialists, Inc. was first awarded the contract for the Deep Basement construction using FS top-down construction technologies for underground construction. The deep basement construction was particularly challenging : the two adjacent old buildings were resting on shallow foundations, and the lot area had been previously excavated for several meters of depth and left open for quite some time, without any slope protection, which had inevitably caused decompression of the immediate surrounding ground. The surrounding Buildings gave no permission to install temporary post-tensioned anchors for the Diaphram Walls, consequently the Support of DW during the pit excavation was provided by a multi-level system of steel props. Due to the two flanking buildings, and the congested area, a luffing crane was chosen tor the construction of the two towers of Perla Mansion. The high strength Concrete for the buildings structural works was supplied by FS Ready Mix Plant. Perla Mansion & Prince Plaza-II were built simultaneously.

PERLA MANSION

METRO MANILA