The Rocla MassBloc® retaining wall system has proven to be a valuable complement to Rocla M-Lock® precast bridges, providing a quick and easy solution to abutment protection.
Cowra Shire Council in Midwestern NSW recently replaced an ageing timber bridge over Neila Creek with a Rocla M-Lock® bridge. The bridge comprises two 12-metre spans on Rocla® hollow-spun concrete piles. Cowra Council had used the MassBloc® system previously and had found the blocks quick and easy to place. The large precast permeable concrete blocks interlock to create permanent retaining structures that can be rapidly deployed to counter erosion, land slippage and wave energy. The blocks are interlocked by a nib precast into the base. Construction is mortarless and an experienced crew can place up to 70 square metres of wall a day. The Rocla MassBloc® retaining wall system was the obvious choice to provide scour protection for the abutments of the new M-Lock® bridge. Neila Creek, which drains into the Lachlan River, is usually dry but is prone to flooding. Council’s own in-house labour crew built the M-Lock® bridge and the MassBloc® walls. They were assisted with piling works by Murray Valley Piling.