Wall Construction

[LC06]

Hello,

I'm a Civil/Site Engineer and I'm currently dealing with the permitting process for a residential subdivision. The access road to the subdivision requires a 30-foot high retaining wall to be constructed in a cut. The soils are very course sand overlaying course gravely sand. The problem I've ran into is that I'm not sure how to generally construct this wall. How would the excavation be stabilized? Would sheeting be used? Shoring? The cons. comm. does want some sort general explanation. Any thoughts? I've attached a cross-section.

Thanks!

 

[PEinc]

I agree with born2drill about secant pile walls. However, I thought this wall was to be a permanent retaining wall along a driveway cut into a hillside. Very few residential developments need or can afford a wall this high.

born2drill, did you work for SFC or Moretrench? Which office and when?

 

[chicopee]

Get hold of Doublewall in Plainville,CT. Their retaining walls are used on many private and state projects.

 

[PEinc]

I would think that Doublewall would be the wrong wall to build in a 30' cut, maybe even a higher cut if the ground slopes up behind the rear end of the Doublewall blocks. You would still need a tiedback temporary sheeting wall. In addition, I'm not sure if Doublewall can go 30' high.

Why build two high walls when you can build just one?

 

[born2drill]

I'm always somewhat skeptical when I'm told that I *have* to use one proprietary product or another. There are many, many techniques for earth support and what is economical in one case or for one contractor might not be for another.

PEinc - I used to work for Moretrench in NJ up until about '05.

 

[PEinc]

born2drill,

Then I probably know you. What retaining wall projects were you on?

 

[born2drill]

Oh boy... what retaining wall project wasn't I on?

Bank Street Commons, Bronx Criminal Courthouse, PA Rt 309, The Siena in Montclair, NJ to name a few. Sound familiar?

 

[chicopee]

One of the projects was the expansion of I91 in Bridgeport, CT where some heights were at least 25'.

 

[chicopee]

Oops,I95.

 

[PEinc]

born2drill, I designed the sheeting and soil nailing for Bank Street, Bronx Criminal Courthouse, Route 309, and The Siena. Now, you must know me. Who are you? Take of your mask!

 

[chicopee]

No, I have no idea who you are. I did not design this wall nor was I involved in its erection. It was erected back in the 90's and at that time, it was a great looking impressive retaining wall. I worked there in an another capacity, however, on construction sites tradespeople are not blind about the work of others.

 

[PEinc]

chicopee, please pay closer attention. My previous comments were clearly addressed to born2drill. I'm sorry if I confused you or anyone else.

 

[PEinc]

born2drill, are you Frank V.?

 

[born2drill]

Ha, no.. good guess though. He left a little before me. After I saw your profile I realized who you were.

I work with Andy P now. Does that get you there?

 

[PEinc]

Nolan!

 

[born2drill]

You got it, John. Boy, we really hijacked this thread, didn't we?

 

[PEinc]

I guess it doesn't matter much that we hijacked the thread. The original poster never participated after making his original post in JANUARY!

Now, don't you be spying on me in these forums!