| Gun
Wharf Quay, Wightlink Pier,
Portsmouth
MONITORING |
 |
| Monitoring
Pier structure to provide movement |
| data
for Mowlems |
| Client:
DSA |
| Date:
Autumn 2001 |
| Status:
active |
| Clients
requirements. |
| To
monitor expected movement of the Wightlink Pier structure
adjacent |
| the
marine construction site of the Spinnaker Tower at
Gun Wharf Quay. |
| Method. |
| Working
with Portsmouth City Council and Giffords Consultants,
carefully |
|
selected monitoring points were established in 27
places for vertical |
| movement,
and 6 further positions beneath the structure, accessible
only by boat. |
|
|
| access
the underside of the deck by boat |
|
|
| Level
points were established on the concrete deck |
 |
|
In
this picture the newly constructed Gun Wharf Quay structure
can be clearly seen juxtaposed with the old Victorian Wightlink
pier on the left. The photo was taken in October 2001 before
construction of the tower begins. |
|
|
High
Tide level
surveys are taken at high and low tides. Low
Tide
|
 |
|
The
survey of the underside of the pier has to be carried out
by boat, with a 90 minutes tide window, during which period
the tide is high enough to cover cross beams, but low enough
to access to underside of the deck. |
|
 |
|
