The only one of these I've seen, involved a bank collapse resulting from
poor shoring. That fix (as I would suggest for your job) was chemical
injection stabilization. If you have the sandy soil, typical in S.F.,
you'll a modest strength sandstone that won't need shoring. Check the
phone book (I don't remember who we used).\
Chuck Utzman, P.E.
IRV FRUCHTMAN wrote:
> Dear Fellow Engineers:
> San Francisco friends asked me about a problem re a
> new home they are building in the city. It will be
> located on a steep hill tucked in between two existing
> homes and will require excavation and retaining walls.
> To minimize construction cost and lost floor space, my
> friends' shoring engineer designed a tied-back
> retaining wall for the uphill side that also underpins
> the uphill neighbor's home foundation. The height of
> the retaining wall will vary from 4 to 15 feet. It
> uses helical anchors to tie back the wall; these will
> also run beneath the neighbor's home. The excavation
> is done starting from the top and working downwards in
> segments. In each segment steel reinforcing is placed
> and shotcrete is sprayed against the exposed dirt.
>
> 1. Do you have concerns with this excavation /
> retaining wall design?
>
> 2. So far the uphill neighbor hasn't agreed to
> authorize work under his home; any suggestions on how
> to convince him to allow the work?
>
> I'd appreciate your opinions.
> Irv
>
>
>
> ____________________________________________________________________________________
> Be a better friend, newshound, and
> know-it-all with Yahoo! Mobile. Try it now.
http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ
>
>
> ******* ****** ******* ******** ******* ******* ******* ***
> * Read list FAQ at: http://www.seaint.org/list_FAQ.asp
> *
> * This email was sent to you via Structural Engineers
> * Association of Southern California (SEAOSC) server. To
> * subscribe (no fee) or UnSubscribe, please go to:
> *
> *
http://www.seaint.org/sealist1.asp
> *
> * Questions to seaint-ad@seaint.org. Remember, any email you
> * send to the list is public domain and may be re-posted
> * without your permission. Make sure you visit our web
> * site at: http://www.seaint.org
> ******* ****** ****** ****** ******* ****** ****** ********
>
>
******* ****** ******* ******** ******* ******* ******* ***
* Read list FAQ at: http://www.seaint.org/list_FAQ.asp
*
* This email was sent to you via Structural Engineers
* Association of Southern California (SEAOSC) server. To
* subscribe (no fee) or UnSubscribe, please go to:
*
*
http://www.seaint.org/sealist1.asp
*
* Questions to seaint-ad@seaint.org. Remember, any email you
* send to the list is public domain and may be re-posted
* without your permission. Make sure you visit our web
* site at: http://www.seaint.org
******* ****** ****** ****** ******* ****** ****** ********