foundation protection
 

foundation protection
there is an existing fence wall with a shallow foundation 300mm. a drain is to be constucted along the fence line with inverts much lower that the foundation base of the wall. excavation is to commence; how can this be achived without compromising the wall foundation?
thank you

can the drain line be moved the soil influence distance away from the foundation?
i think it depends on how long the wall is. you can do it in sequence. maybe use a trencher? may dig 1/6 of the length, put the drain and the slurry (gravel), back fill most of it, and dig some more. use your engineering judgement on how much you can dig at a time without affacting the wall. when you dig one side of the wall, think of it as the wall will act like a retaining wall. i think a trencher/small bucket hoe and a jumping jack will do the job. what do you think?
bkhenry2,
get your geotechnical consultant on the phone, pronto!
jeff