Trench boxes on sloping embankment

[csd72]

Has anyone used a trench box on a sloping embankment?

The final state is easy to achieve but doing a stage analysis for its stability during construction is very difficult.

Any advice would be appreciated.

 

[DRC1]

I am not sure what you mean by stage analysis for a trench box. Typically you dig a hole and drop it in. There is no stage analysis to perform, or am I misunderstanding something?

 

[csd72]

DRC1, its a 4 to 6m deep hole so it is not really stable without support.

 

[wedlmic]

I assume you mean unballanced loading. The trench box should be able to resist full lateral pressure on one side without failing in any manner. It should also be able to resist loading on the lower section (below the lowest brace) without failing in any mode. This allows the box to be set in a shallow cut and sunk as excavation progresses below its leading edge. THE BOX MUST REMAIN PLUMB.

Wedlmic

 

[DRC1]

Sorry, I have been traveling.
How much unbalance are we talking about?
Holes do not need to be dug tight to the box and often are not. You can either dig the box in before you set it or partially dig the hole then set the box and then finish excavating and pushing the box down. Be sure the box is designed to do this. These are big boxes. Typically over about 3 meters the boxes are stacked.
I would sugesst you talk to the box manufacterer for answers to your specific questions.