Shoring Prestressed Tie-backs

[ajk1]

where prestressed tiebacks extend under the property of the adjacent owner (in our case there is an existing building on the property under which the tiebacks extend), is it the practice NOT to de-stress the tiebacks on completion of the work? I believe that is the practice, with the possible exception of where there is an excavation contemplated for the property onto which the tiebacks extend. My understanding is that the tiebacks anchored in soil will generally de-stress themselves due to creep of the soil etc., so that after 10 years there will be little or no stress left in them, but my understanding is also that irrepective of whether they de-stress themselves, it is the general practice not to destress them on completion of construction except where an excavation is planned for the adjacent site.

Any comment?

 

[slickdeals]

I believe you should de-stress if you don't need it after completion of construction. You don't want to take a chance that someone could accidentally cut a prestressed tieback anchor for reasons beyond your control.

 

[dcarr82775]

Varies, but most I have seen are left tensioned since they are temporary and simply get buried. Over the bond length not too much will happen if the strand gets broken anyway. On the free length it could snap I suppose, just never heard of it.

 

[hokie66]

My experience is the same as dcarr's.