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 Sch
Trang 1TOP-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
Trang 2Diaphragm Wall Installation
Trang 4Conventional Open-cut & Bottom-up
Construction Method (For
comparison with Top-Down Method)
Trang 5Top-Down
Construction
Method
Trang 6Top-Down Construction Method
Trang 7Main Advantage of Top-Down Construction
Trang 8Details of Top-Down
Construction Method
Trang 9Excavation to Level -1
Trang 10Excavate to Level -2
Trang 11Compaction and leveling of
basement slab for reinforcement
and concrete works
Trang 12Circular ramp beam and wall
supported on bored column
Trang 13Excavation work of Level -3 in progress, use of clamp-shell for exc.
Trang 14Excavation of Ramp Level -3 to - 4 in progress
Trang 15More excavation work in progress
Trang 16More excavation work of lower levels inprogress
Trang 17Above ground, structure works in progress
Trang 18Typical basement reinforcement slab ready for concreting
Trang 20Top-down construction work in progress
Trang 21Complete construction of project
Trang 22Another example of top-down construction
Trang 23Another example of top-down construction
Trang 24 Need careful consideration for use in HCMC since method is new here
Ideal for 5 basements or more
May need some soil improvement
techniques and good dewatering system
Equipment for these works may not be