Civil Engineering Reference
In-Depth Information
Fig. 4.2
Structural Plan of PG-1 and PG-2
Adjacent to building PG-1 is another four-story parking-structure (PG-2) of
similar construction, but different footprint, which houses the concrete ramps
providing access to PG-1. The two buildings are separated by an expansion joint
along their lengths. PG-2 was not subject to earth pressure at the northern side due
to the presence of a multi-story building with an excavated cellar extending the
full height of PG-2 above the basement, at its northern edge (Fig. 4.1). No signs
of structural distress or lateral movements were observed in PG-2.
Boreholes taken behind the northern wall of PG-1 indicated that the top 6 m (20
ft) to 8.5 m (28 ft) of soil retained behind the northern wall of the building consist
of miscellaneous uncontrolled fill composed of shot rock intermixed with brown
medium to fine sand with varying amount of silt and gravel. Large boulders were
also common. The fill was underlain by a layer of medium to fine sand nearly 3 m
(10 ft) thick overlying sound rock. The ground water table was below the
building's foundations.
