TECHNIQUES FOR PILE BREAKING

摘要

The present application relates to a method of breaking a concrete or grout element (10, 20) having a reinforcement means (11) which has been treated such that it will not substantially adhere to the surrounding concrete or grout. One or more expandable elements (12, 13, 14) are cast within the concrete or grout at a desired level and a fluid is supplied to the expandable element in order to cause the expansion thereof. The pressure exerted by the expandable element on the surrounding concrete as it expands causes said concrete or grout element to break.