The CM3 principle
Patented structures, particularly well suited to strong heights of backfillings, consisting of two half-arches leaning one on the other’s key,combined longitudinally by junction, installed on a ledger line or a general concrete invert.
Hydraulic section from 10 m2 to 55 m2.
Maximum height of backfilling: 35 m above the key.
|Section (m²)||r (m)||R (m)||Interior height (m)||Opening (m)|
alternate support at the key of arch
CM3 principle is especially dedicated to underpasses strongly backfilled, adapted to all type of traffic, and allows the construction of :