calvinandhobbes10
Structural
- Feb 14, 2011
- 106
Below is a detail I've seen used in air traffic pavement. The idea is to bury a non-traffic-rated precast manhole beneath the concrete pavement, and beef up the concrete to span over this manhole (using a 9" gap). As I look at this detail, I am concerned about the lateral soil pressure applied to the outer face of the precast manhole due to the air traffic wheel loads above (surcharge). It appears to me that the standard-issue precast manhole is being asked to withstand the increased lateral from this surcharge, which it may not be rated for and certainly isn't being checked for. The manhole is circular which certainly helps. Does anyone see any issue with my assumed load path, or alternate ways to analyze this to deal with the surcharge? Thanks
