Most areas on site are not particularly sensitive to lowering ground water levels. The excavation in these areas
will be retained with horizontal timber poles lodged between steel posts (referred to as king posts).
The ground between the Carillon and the Tasman Gardens Apartments is sensitive to settlement through loss of ground
water pressure, so in this area sheet piles will be used. Interlocking steel sheets (sheet piles) form a barrier to ground water loss. The sheet piles will be installed prior to excavation for construction of the underpass.
Working around the sewer
The sheet wall will be 40m long before it reaches the Tory Street Interceptor Sewer.
- The sheet wall will be 40m long before it reaches the Tory Street
- The sewer is an egg-shaped brick structure which is more than
100 years old and is 8m below ground.
- Monitoring equipment will be installed in the sewer manhole to
measure any effects on the sewer.
This article comes from mch edit released