Drilled Pier bored through geogrid
Drilled Pier bored through geogrid
(OP)
I have a building addition that is anticipated to be constructed near an existing modular block/geogrid retaining wall.
The wall is about 10 feet high and there are supposedly horizontal geogrids extending from the earth side of the wall back about 10 feet or so.
I need to establish buildng columns just behind the wall and want to use deep drilled piers to support it - the column/piers would be located about 5 to 8 feet behind the wall.
Can one drill a pier through existing in-place geogrid successfully? Does it just tear the geogrid in the discrete locations or would we run the risk of snagging the geogrid and ripping it from the wall?
The piers are about 30 feet apart so the damage to the geogrid would be very localized.
The wall is about 10 feet high and there are supposedly horizontal geogrids extending from the earth side of the wall back about 10 feet or so.
I need to establish buildng columns just behind the wall and want to use deep drilled piers to support it - the column/piers would be located about 5 to 8 feet behind the wall.
Can one drill a pier through existing in-place geogrid successfully? Does it just tear the geogrid in the discrete locations or would we run the risk of snagging the geogrid and ripping it from the wall?
The piers are about 30 feet apart so the damage to the geogrid would be very localized.





RE: Drilled Pier bored through geogrid
Brad
RE: Drilled Pier bored through geogrid
RE: Drilled Pier bored through geogrid
Nuccio - does a core barrel (not sure what that is) work for a 30" or 36" diameter drilled pier?
RE: Drilled Pier bored through geogrid
RE: Drilled Pier bored through geogrid
i agree with above comments, it'll likely jerk the grid and wrap around the auger. driven would work better. i'd try to offset behind the grid or in front of wall if punching the grid isn't allowed.