temp. retaining wall using a beam in concrete and 1" 'street plate' 6

[ewhpeps]

I need advice on designing a temporary retaining wall on a construction site. I want to utilize the H-beams (W27x102)that extend out of 48" diameter concrete shafts (secant wall) approximately 3' to prop up a 'street plate' 8'x20'x1".

So the retaining wall will be 8' high with the bottom 3' supported by the H-beams that are spaced 3' on center. Behind the wall, engineered fill will be placed to the top of the wall then sloped another 2' for a total height of 10'. Once up to grade, a delmag RH32 drill rig (143 kips/track) will crawl out and drill a wall of sand shafts that is 10' offset of the secant wall. The edge of the track of the drill rig will sit within 1' of the top of the slope and be approximatly 3' away from the wall.

I attached a sketch of the design but the 1" plate is only 8' high so the top 2' will have to be sloped from the top of the wall to get the full height and the rig will have to be moved over 2 more feet.

 

[ewhpeps]

if anyone is curious, here is what we are building. material is being fabricated and should be all welded up in 2 weeks.

 

[PEinc]

Well, you got me confused now. Where are the TS4's and what do they do? What is the #11 bar for?

http://www.PeirceEngineering.com

 

[ewhpeps]

#11 bars are part of the permanent design of the secant wall. They will tie into the concrete wall that eventually goes on top of the secant wall. The TS4's are merely a spacer so to keep the street plates off of the #11 bar.
Basically you got the 3' of W27 to work with. The 2-TS4's welded to each flange are 6'tall and tied together at the top by a 3/8" plate. The 8' tall street plates will bear on TS4's. On each W27 will be an angled TS5 that helps support the TS4's.
The secant wall is completely done. The sole purpose of this retention system is for temporary support to drill the sand shafts from a higher elevation. Due to space restrictions we cannot move forward on the permanent concrete wall right now.

 

[PEinc]

Thanks for the clear explanation.

http://www.PeirceEngineering.com