In the engineering of Shijiazhuang-Qingdao expressway old cement concrete pavement reconstruction,the old slabs are crushed through a new resonated crushing technology in order to become the base course of new pavement structure.

Combing with the sluice key project in Cao-e River,this paper analyzes stress characteristics of piles by three methods to treating soft foundation like gravel compaction by vibrating roller,compaction by vibrating roller,and vibrating and tamping method.

The paper points out the construction method,the vibro-replacement crushed stone column,for the large area of soft ground in high-fill sections,introduces the features and the acceptable conditions of the construction method,indicates its action principle as well as the construction keys of the method;furthermore it also undertakes the effectiveness check and profits analysis.

In view of the reflective cracking appearing in the"white changing into black"and"white adding black"projects, the article puts forward the use of resonance breaking technique thoroughly to solve the technical problem puzzling the engineering field for a long time.