EnviroLiner 4040 Underlay with Retaining Wall
LOCATION: Edmonton, AB TIMEFRAME: Oct. 2011 (Ponds 10,18 Liners) Nov. 2011 (Liner and Walls)
SCOPE OF WORK: Enviro Liner 4040, LP8 underlay in Pond 10 (8,400m2) Pond 18 (2,300m2), and Retaining Wall at Pond 18 Green (1.35m high – 9 blocks high, includes LP30T geogrid, drainage gravel, etc).
PROJECT PARTNERS Owner: Royal Mayfair Golf Course Client: Royal Mayfair GC Installation: Oct-Dec 2011 Material suppliers: Layfield PolyFilms, Expocrete (Pisa stone), Mirafi (Geogrid)
There were challenges in designing the retaining wall on top of the liner, at the anchor trench location. The existing rail-tie walls were sitting directly on the existing liner, and were staked thru the liner. There was also limited space to excavate, due to being directly adjacent to the 18th green. Another challenge that came up in the design stage was that the wall needed to be higher (and deeper), to allow for the water freeboard levels.
The pond liners were installed relatively trouble-free. The pond 18 liner was intentionally prefabricated short (so the wall design could be finalized), then material was welded on to the retaining wall end.
The original retaining wall designs were for a shorter wall, and used fewer cross-sections to anchor. Layfield involved E2K Engineering to assist with design. The retaining wall needed to be designed higher (to allow the liner anchor trench to be above the water freeboard level) and the wall reinforcement needed to be re-designed. We finalized a solution, to accommodate the liner containment, wall strength and appearance.
Layfield was able to install the pond liners in a timely manner, while a good weather window was available (in October). The wall design was fast-tracked, with E2K’s assistance, along with the Pisa2 stone supplier (Expocrete). We had Co-con assist our Service crew with installation guidance, along with some labour assistance from the Royal Mayfair. Overall, the project went according to schedule (and budget), with the weather holding off, in order to complete the majority of the work.