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Topic: Old soak away under driveway< Next Oldest | Next Newest >
Hawaii04
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Posted: 09 Mar. 2017,16:45 QUOTE

Hi. Another question from me I'm afraid. During excavation of my driveway, I uncovered an old soak away which has left a bit of a dip in the profile. I know this soak away has been blocked up for years as I disconnected it and re-routed a new one many years ago. Question is: should  I just top up with type 1 when I'm putting the sub base down or can I just back fill with the soil/ chalk which I've excavated and bring it up to the required level. Thanks.

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John
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lutonlagerlout
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Posted: 09 Mar. 2017,18:20 QUOTE

ideally it should be excavated and filled in layers of type1
in the real world I would cap it with concrete below formation level,never use spoil for backfill
LLL


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Hawaii04
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Posted: 09 Mar. 2017,21:56 QUOTE

Thanks for the info.

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John
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seanandruby
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Posted: 10 Mar. 2017,09:19 QUOTE

Compact it to refusal. You can cap with chalk, no soil. Cover with a good quality geo grid and then terram on top of that. You can start your formation after that.

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sean
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