When cutting for a round culvert or multi-plate arch, is it necessary for the whole wall unit to remain intact, and what is the best way to secure the unit?
On many cuts, it is nearly impossible to keep the whole unit intact. After the cut has been made, pin the unit if possible and apply a liberal amount of adhesive to secure. It is also important to use additional clean rock fill behind these units to ease compaction efforts, provide additional drainage, and to prevent fine material from migrating through any existing gaps. An additional solution is to design in a collar for the front edge of the culvert or multi-plate in order to conceal visually the construction joint where the wall units are cut to fit the curved structure.
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