steveyeung
Civil/Environmental
Does any foundation engineer know whether secant bored pile (wall) is able to be socketed down into "Porous Rock - Allowable Bearing Pressure = 1000 kN/m square" for say 3-5 metres?????
Tek-Tips is the largest IT community on the Internet today!
Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!
-
Congratulations TugboatEng on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!
Depth of Secant Bored Pile in Rock
- Thread starter steveyeung
- Start date
- Status
- Thread starter
- #3
steveyeung
Civil/Environmental
The problem is an exam question.
The bored pile wall is designed to act as an abutment of a highway bridge.
Horizontal load:
1. 205 kN/m (from traffic)at the level of the bridge deck
2. It is an abutment so it has to support lateral earth pressure from backfill/retained soil of 6m deep and surcharge say 10 kN/m square.
Note that the elevation difference between the bridge deck and the road underneath is 6m so the length of pile should be at least 6m. In addition, the carriageway is assumed to be two lane (7.3m wide) single diection carriageway.
Vertical Load:
1. about 80kN/m
Other information:
The level of the porous rock is just 3m below the bridge deck but 3m higher than the road underneath. The problem is that if a big strip footing is adopted which rests on the rock surface, it will impose "high" bearing pressure on the rock and may destabilize the 3m high vertical "slope"
The bored pile wall is designed to act as an abutment of a highway bridge.
Horizontal load:
1. 205 kN/m (from traffic)at the level of the bridge deck
2. It is an abutment so it has to support lateral earth pressure from backfill/retained soil of 6m deep and surcharge say 10 kN/m square.
Note that the elevation difference between the bridge deck and the road underneath is 6m so the length of pile should be at least 6m. In addition, the carriageway is assumed to be two lane (7.3m wide) single diection carriageway.
Vertical Load:
1. about 80kN/m
Other information:
The level of the porous rock is just 3m below the bridge deck but 3m higher than the road underneath. The problem is that if a big strip footing is adopted which rests on the rock surface, it will impose "high" bearing pressure on the rock and may destabilize the 3m high vertical "slope"
- Status
Similar threads
- Locked
- Question
- Locked
- Question