Abstract

A new technique reduces unwanted voids in annular sand packs surrounding inclinometer casings installed in boreholes. The technique involves generating a quick condition in the annulus sand due to induced upward water seepage. Simple end fittings direct water down the inside of the casing, out at the bottom in an upward direction, and through the annulus to the surface. Present data indicate that shovel-placed annular sand packs decrease in volume by about 10 percent after becoming quick, causing the inclinometer casing to become firmly seated in the borehole.

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