Dean A
Member
has anyone had any experience sinking a concrete manhole( 72" inside diameter ), caisson style? that is removing the soil
and letting the structure sink. This is for a new sewer lift station in a very congested area. no room to open cut.
I plan to remove the soil inside the structure by using a hydro vac. I need to build this structure 27' deep x 6' inside diameter is
about 30 cy. I do plan to attach a steel cutting edge to the lower barrel section.
The soils are clays to fairly dense sand.
Should the manhole barrel be coated with anything to reduce friction?
Any ideas will be appreciated.
Dean
and letting the structure sink. This is for a new sewer lift station in a very congested area. no room to open cut.
I plan to remove the soil inside the structure by using a hydro vac. I need to build this structure 27' deep x 6' inside diameter is
about 30 cy. I do plan to attach a steel cutting edge to the lower barrel section.
The soils are clays to fairly dense sand.
Should the manhole barrel be coated with anything to reduce friction?
Any ideas will be appreciated.
Dean