Temporary Shoring / Wall System To Support Existing Structure
Temporary Shoring / Wall System To Support Existing Structure
(OP)
What type of retention system do you prefer when a proposed wall is being placed in close proximity and supporting an existing structure?
In this case a segmental wall approx 12' tall will be placed about 10' or so from a structure on the high side of the wall. In order to install the wall system the excavation would be with in 4-5 of the structure. I was thinking that the vibration from driving sheet piling or soldier piles may cause movement/damage to the existing structure. Therefore maybe using drilled soldier piles and lagging would be better?
Any thoughts on this situation or any situation in general when you have a tight area and need to support an existing structure above the wall?
Thanks in advance!
In this case a segmental wall approx 12' tall will be placed about 10' or so from a structure on the high side of the wall. In order to install the wall system the excavation would be with in 4-5 of the structure. I was thinking that the vibration from driving sheet piling or soldier piles may cause movement/damage to the existing structure. Therefore maybe using drilled soldier piles and lagging would be better?
Any thoughts on this situation or any situation in general when you have a tight area and need to support an existing structure above the wall?
Thanks in advance!





RE: Temporary Shoring / Wall System To Support Existing Structure
Also, I would scrap the MSE wall in this scenario. Why build two walls? Just build a single wall to do the trick.
I have done many drilled shaft walls directly adjacent to existing buildings. Sometimes there is vibration monitoring, sometimes not, but I have never had a problem with the drilled shafts.
RE: Temporary Shoring / Wall System To Support Existing Structure
This situation is a bit different - it is an old 'stone' foundation that is only 24" below grade. The footing is on the border of the active zone but when excavating they would need steeper than a 1:1 slope. The structure only covers a small portion of the entire wall (maybe 40' of a 300' long wall) so the shoring maybe permanent but they still want the segmental facing as it would be used for the rest of the wall.
When you say drilled shaft walls are you referring to something like a secant pile wall? I suppose a soldier pile wall would need to be top down construction in this situation.
EIT
www.HowToEngineer.com
RE: Temporary Shoring / Wall System To Support Existing Structure
I would also design for at-rest pressures in this area.
RE: Temporary Shoring / Wall System To Support Existing Structure
www.PeirceEngineering.com
RE: Temporary Shoring / Wall System To Support Existing Structure
Also is vibration typically a problem in cases like these with driven piles or sheeting? Is it typically monitored?
Thanks again.
EIT
www.HowToEngineer.com
RE: Temporary Shoring / Wall System To Support Existing Structure
www.PeirceEngineering.com
RE: Temporary Shoring / Wall System To Support Existing Structure
EIT
www.HowToEngineer.com
RE: Temporary Shoring / Wall System To Support Existing Structure
Vibration right next to a building can cause settlement and cracking, in addition to being very annoying.
For most projects, buildings should be underpinned if possible, not sheeted.
www.PeirceEngineering.com