释义 |
pile extractor pile extractor[′pīl ik‚strak·tər] (mechanical engineering) A pile hammer which strikes the pile upward so as to loosen its grip and remove it from the ground. A vibratory hammer which loosens the pile by high-frequency jarring. pile extractorA machine for pulling piles from the ground, e.g., by means of a double-acting pile hammer attached to a pile, each blow of which produces an upward force on the pile. |