Concrete Block Retaining Wall Design Nz
Nzs 4230 2004 design of reinforced concrete masonry structures.
Concrete block retaining wall design nz. Retaining walls can hold up the roads you drive on every day. Good piped drainage that disposes of water away from behind the wall to limit this build up of figure 1. All firth retaining is made in nz. Anchorbloc is an innovative simple and economic solution to one of the most basic civil engineering tasks.
The new zealand concrete masonry manual which was created in the late 1970s as a guide to the design and construction of concrete masonry has been updated and is available in sections for free download as required. Retaining or protecting embankments. 1 4 mortar and. Redi rock gravity walls rely on massive concrete blocks to hold up the earth.
Cost for a concrete retaining wall. 1 2 concrete masonry wall units. Firth keystone retaining wall system lightweight easy to handle and requires no special tools. Perfect for heavy duty garden retaining walls.
Numerous textbooks and technical papers on soil mechanics foundation engineering concrete design masonry design and in all sorts of related topics. Surcharge and zone of influence. A build up of water behind the wall is the principal cause of retaining wall failure. Depending on the concrete blocks used a retaining wall made from concrete blocks could start from around 299 390.
The gravity wall system is an engineered retaining wall solution that relies on the weight of massive one ton blocks to retain the earth. Another concrete option is traditional grey 300 by 150 millimetre blocks but it s not a diy type job as it involves steel and filling. Retaining walls only better. It is a modular concrete block designed to form an integrated segmental retaining wall.
Nzs 4229 1999 concrete masonry buildings not requiring specific engineering design. Firth retaining walls blocks are perfect for creating a landscaping feature. 1 3 modular wall masonry. Despite the many references a single volume on retaining wall design for the professional practitioner and civil engineering student could not be found.
Mass concrete or rubble gravity retaining wall. 1 5 m maximum surcharge 45 zone of influence figure 2. Manufacturers of some proprietary retaining wall systems particularly crib walls have pre engineered design tables that may be used without the need to engage an engineer. Creates walls up to 1m high can go higher with specific design 3 units per lm or 11 units per m2 retaining capping units corner blocks and fibreglass pin connectors are also available 34kg block.