|
|
|
|
| |
|
 |
WALLS
Garstang Marina
The first phase of the marina was designed to serve the Lancaster canal, a single looped canal, rather than a canal which formed part of the national canal network. Excavating the basin to the required depth, in this instance 1,500mm, building a perimeter support wall, installing an entrance/exit and finishing the surrounding area in a pleasing and serviceable manner.
The walling element is one of the most crucial, and in this case was designed by the engineer to be driven trench sheeting. The contractor, in this case doubted the effectiveness of the sheeting, manufactured as they are from steel a limited life expectancy was inevitable. It was the contractor who conceived the idea of using precast concrete retaining walls, contacting, among others, Bell & Webster Concrete for ideas and costings. After several weeks of negotiation, and with the approval of the local authority and others involved, including the client an order was placed for 406 1,500mm high x 1,000mm wide units.
Having completed the excavation of the basin, a strip foundation was laid to the perimeter onto which the retaining walls were placed and anchored. The units were then backfilled and mooring jetties installed. The entrance lock was constructed and once this was completed, the final step was to fill the marina basin with water and allow boats in to moor.
One of the major hurdles the contractor had to overcome was the disposal of the earth from the excavation. Whilst some was used to create a surrounding landscaped area, 50,000 tonnes had to be removed, which it was during the construction period to other locations within the area. |
|
|
| |
|
|
|
|
