"Shear Strength of Rock Mass" for AASHTO Fig. 5.6.2A (b) 2

[civilmonk]

In the absence of any laboratory tests, can someone guide me in the right direction for obtaining general values of the shear strength of rock mass, "s", in AASHTO Figure 5.6.2A (b). (NYC specifically)

 

[PEinc]

cap4000,

That's $1,800.00 plus the socket concrete, plus possibly extra soldier beam length, plus the extra time to drill rock, plus possibly adding another subcontractor or BIG down hole hammer and several compressors into the mix. The cost is much more than $1,800.00.

 

[cap4000]

PEinc

You sold me on toe tie its the best bang for the buck. Except. The one big problem I see is that you can not use adjoining property to drill the tie into. I get many retaining walls just off the property lines and can tell its a nightmare in some NJ towns. Tenafly, NJ requires an agreement in writing signed by all property owners before anything can get done espically if trees are on the line and in the way.

 

[PEinc]

The toe tie is for tiedback walls only. If you are trying to cantilever the soldier beams, you are stuck drilling rock sockets. Sorry.

Also, if trees are along the proposed wall line, you may have trouble with branch and root interference during soldier beam installation and excavation.

 

[cap4000]

PEinc

I normally only do cantilevered soldier pile systems. I plan to use your concept anyway. Say for 8 foot center pile spacing. In between that say at 4 feet I would go with a steel beam waler and a toe tie anchor if I see the rocket socket depth should of been deeper that I designed it for. Its a nice fall back position for me to keep in mind. Just in Case! Thanks Again.

 

[PEinc]

That wouldn't be a toe tie or a cantilevered wall. That would be a tiedback wall, wouldn't it?

 

[mail111]

Would like to know the quality control criteria for skin friction piles socketted 6m into micaous schist rock. What camera may is available to video the socket submerged by the sea water, if video inspection would become necessary. Socket diameter is ~ 30". Is videoing really necessary. If not how the soundness of socket walls can be verified? Thank you.

I would appreciate your feedback.

 

[mail111]

Would like to know the quality control criteria for skin friction piles socketted 6m into micaous schist rock. What camera may be available to video the socket submerged by the sea water. Socket diameter is ~ 30". Is videoing really necessary. If not how the soundness of socket walls can be verified? Thank you.

I would appreciate your feedback.

 

[PEinc]

mail111,

This sounds like a new question. You probably would get better feedback if you started a new question with an appropriate subject line.