We should ram the soft ground with heavy rammer awarding to certain distance, fill up the pit with construction wastes, and tamp again.

用重夯按一定夯距夯击软土地基，在夯击坑中填充建筑废料，再进行夯实。

youdao

In a turn of phrase which I think many Keynesians today might feel would have been better left unsaid, Keynes argued that this would work even if workers were hired by the government simply to dig holes in the ground and fill them up again.

FORBES: Shock horror - the Olympics are not Keynesian

"There was a Labour councillor who said the statue should be ground down and used to fill potholes up, which is absolutely disgraceful, " he said.

BBC: Margaret Thatcher statue