Soil subsidence and trees

Ekka

I remember back in Adelaide (notorious for active clay soils) there was a double lane road going past K-Mart near Parafield Gardens area.

It was wavey and you'd get that feeling in your stomach when driving over these waves.

So, finally the roads dept decides to rip it up and fix it.

Every day I travelled this road, for years. So I watched carefully.

The ripped it up and excavated a little, new rocks/road base etc and rolled the living crap out of it. They were meticulous and finally went down the tarmac and it was open again.

It drove like ice, beautiful. Then after a few months it was bumpy. About a year later the undulations were back. After 2 years you'd swear nothing was ever done and it was just as bad as in the first place.

Go figure that out, weird, the soil was mighty unstable. There were no trees about either.

They recorded in some test in Adelaide up to 75mm of soil movement up and down throughout the year. Obviously this one was a lot worse.

__________________

Free Tree and Green Industry Link Directory

Qualified Brisbane Tree Lopping

Brisbane Tree Care, Consultations and Arborist Reports

Forum Sponsors