Discussing on Design of Uplift Pipe Precast Pile Embedded in Cement Soil

According to the real project events, the basic principle and characteristics of uplift Pipe Piles Embedded in Cement Soil (PPECS) were introduced. For comparing the uplifting capacity and economic benefits between the PPECS and Drilling-casting Concrete Reinforced Pile (DCRP), in the same field, 6 piles with 2 types of PPCS, and 5 piles with 2 types of DCRP were constructed and did uplift static load testing to each of them. According to the testing results and the cost of pilling, the conclusions are as follows: at providing the same uplift capacity, the uplift displacement of PPECS is just 1/3 of DCRP, but the cost of a PPECS pile is just 80% of DCRP; Tension Mechanical Sleeve is effective in jointing pipes and foundation. PPECS is good for construction quality and environmental protection, also to be cost-saving.