Trench fill foundations rubble in trench wall and obstructions!

[valente]

Have a look at these Pictures .. on one side of the trench wall I have dug to accommodate foundations for the garden building I plan to construct in 300mm brick and block there is quite a bit of old brick and rubble .. should I shutter this off before pouring concrete or should I just fill the whole lot?

Also there appears to be the top part of an old wall intact and passing through the width of the trench on another side .. I was just thinking of passing rebar through it in drilled holes and pouring concrete over that as well as opposed to cutting it out .. what do people think?

 

[vinn]

Clear the loose material from the bed of the trench
Why you have such a large trench for a garden shed beats me.
Ignore the builders rubble in the side walls, and ignore the concrete "wall" passing across your trench.
Pour your strip footing or trench fill to the required height.

 

[valente]

Thanks Vinn ..the trench is 600 wide for 300 mm cavity wall which I thought was standard practice .. I've gone about 700 deep though it probably should be more like a meter in clay ..I'm sure there will be those that will say I am taking a risk with that!