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Caisson construction

Caisson construction

Caisson construction

(OP)
What is the best, permanent liner to use for an 8'-6" diameter X 15'-0" deep caisson installed in very dense, gravelly sand with silt (GP-GM) with no groundwater detected?

RE: Caisson construction

Why not use a concrete box culvert-type section for the caisson and use a bituminous mastic sealant in the seating joint for each unit.  If there is no water present in the ground then you will not require a liner.

Andy Machon

 
 

RE: Caisson construction

(OP)
Thanks, Andy, for your quick response.  However, I did not relate enough information about this problem.  This caisson is really a pit with 2' thick walls and base slab.  My concern is with construction of the pit and not the design.  The site consists of 8 pits and I was looking for the most efficient way of construction.  The client has requested that the liner remain in place.

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