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.

To analyse the behavior of PHC pipe piles un-der lateral load by three different shallow foundation treatment methods,including gravel compaction by vibrating,compaction by vibrating roller,vibrating and tamping method,field lateral static load test was carried out.

According to design and practical local condition,the article fills roadbed with rolling method,illustrate construction technology of sandy roadbed,discusses testing content and method and compaction parameter design,and analyzes testing data to guide construction,which has active referential meaning for similar construction.

In order to get the technical parameters of impact-rolling method to stabilize the collapsibleloess,the test area is selected to use for impact-rolling tests.

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.

Rolling construction technique of rolling the pebble foundation;

Smoothing and rolling technology of stabilized soil works;

Logical sedimentation term of subgrade and be open to traffic rolling;