sand pile

noun Building Trades.

a base for a footing in soft soil, made by compacting sand in a cavity left by a wooden pile.

Origin of sand pile

First recorded in 1900–05

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

He shouldered the dog away, and dug his hands into the sand-pile to stop the bleeding.
The Hoofer
Walter M. Miller
And, behind, there was the widda at the winda, all eyes fer that sand-pile.
Alec Lloyd, Cowpuncher
Eleanor Gates
And from front-yard, back-yard and sand-pile flocked the children to see the fun.
Billy Whiskers
Frances Trego Montgomery
Outdoor Play—The building instinct: the sand-pile, miniature houses, practical play-houses, camps.
Woman's Club Work and Programs
Caroline French Benton
At six years of age the child was studying Latin, when he should have been digging in a sand-pile.
Little Journeys To The Homes Of Great Teachers
Elbert Hubbard