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Bottom of Fill Slope_Key/Anchor Detail Needed

Bottom of Fill Slope_Key/Anchor Detail Needed

Bottom of Fill Slope_Key/Anchor Detail Needed

(OP)
I am about to begin grading a fill project (Building pad high: 2:1 slopes to daylight, below).  The overall height of fill (over 60')will require a 6' wide bench, mid-height, per UBC.  However, I will need some type of key at the bottom of slope (no walls will be considered by my client).  

Any ideas, advice, or what-out-for-thats?  

Thanks,

Mike

RE: Bottom of Fill Slope_Key/Anchor Detail Needed

What does your geotechnical engineer recommend?  A 60 foot tall 2:1 slope with a building at the top requires engineering, not just a reference from the UBC.  What are the soil conditions, fill type, existing slope, etc.?

RE: Bottom of Fill Slope_Key/Anchor Detail Needed

I second the previous comment.  This high of an embankment, with a building load and relatively steep side slope requires a geotechnical engineer.  Slope stability is a potential disaster.

RE: Bottom of Fill Slope_Key/Anchor Detail Needed

(OP)
Maury/GeoPT,

Thanks for responding.  Yes, a (final) geotech evaluation will be ordered in the mid-to-later stages of the design. Currenly, I am at a SD/DD-level for reasons of pursuing a use-permit: I am not at CD.  So, I only need to show conceptual-level details.

Answers to your questions:  Good fill quality/engineering soils are to be placed on a 3:1 (max) existing slopes that are not in 'slide' zone.  Basically, good conditions without any tricky BS.

I am looking for general/loose dimensions of the key to communicate to the planners; later on, the geotech will specify, endorse, etc. etc. etc.

Again, thanks for responding.

Mike





RE: Bottom of Fill Slope_Key/Anchor Detail Needed

What you are asking is simply not possible without the information/analisys of an engineer with either actual data or at the very list a very good understanding of the conditions.  

Waiting to the mid to late stages of design to get a professional geotechnical engineer involved is asking for a lot of problems, redesign, and added cost.  

RE: Bottom of Fill Slope_Key/Anchor Detail Needed

I second the previous opinions on getting a local geotech involved, even if it is just to bounce ideas off.

recommend you post this in the following forum:
Geotechnical Engineers
      Slope stability engineering

you should be prepared to provide additional data on the geology, soils, loadings, etc.  

RE: Bottom of Fill Slope_Key/Anchor Detail Needed

hardycross - sorry, but your bosses are being fool-hardy. Now is the time that a geotechnical engineer should be involved - from conceptual to final details.  What if your "conceptual" design is out to lunch?  Don't think that a geotech will come in and think the geotech will specify, endorse, etc etc etc. brrrrrrr  Listen to GeoPaveTraffic.

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