Precast Chambers

Scope of Work:

The design scope involved the design of precast chambers and cover slabs. The chamber walls, which include large openings, were analyzed using STAAD software. These walls were designed with pinned connections at the bottom, while the cover slab was supported by bearings on the walls—allowing the top of the wall to remain free and the bottom pinned. The chamber walls span horizontally, and the base slab was analyzed using STAAD Connect software for upthrust loads, assuming a pinned connection at the wall. At larger openings, the base slab was restrained in the Y-direction (downward) due to the culvert dead load.
The construction was carried out in two pours. In the first pour, the precast chamber walls were cast, incorporating RFA strata boxes and couplers. In the second pour, the precast base slab was cast, with its reinforcement lapped into the strata box and coupler reinforcement.