Top down constuction
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TOP-DOWN CONSTRUCTION METHOD
Use
of diaphragm wall as the side support
for the earth
Construction progress upwards and
downwards at the same time
Savings in construction time
Schematics and pictures give ideas on
ongoing activities during construction
Diaphragm Wall Installation
Conventional Open-cut
& Bottom-up
Construction Method
(For comparison with
Top-Down Method)
Conventional Open-cut & Bottom-up
Construction Method (For
comparison with Top-Down Method)
Top-Down
Construction
Method
Top-Down Construction Method
Main Advantage of Top-Down Construction
Details of Top-Down
Construction Method
Excavation to Level -1
Excavate to Level -2
Compaction and leveling of
basement slab for reinforcement
and concrete works
Circular ramp beam and wall
supported on bored column
Excavation work of Level -3 in progress, use of clamp-shell for exc.
Excavation of Ramp Level -3 to - 4 in progress
More excavation work in progress
More excavation work of lower levels inprogress
Above ground, structure works in progress
Typical basement reinforcement slab ready for concreting
Concreting of
basement slab
for top-down
construction
method
Top-down construction work in progress
