Construction Practice of Super-long Pre-stressed Tubular Pile

Abstract:

Based on “Pre-tensioned Pre-stressed Concrete Tubular Pile”（GB 13476-1999）and “Design Structure Standard Alta”（2002 Zhejiang G22）, the length-diameter ratio of frictional pre-stressed tube pile should less than 100, and the length-diameter ratio of end bearing pile or frictional end bearing pile should less than 80 while getting through a certain thickness in hard soil. The paper introduced an engineering case of super-long pre-stressed tubular pile in silty and sandy soil with the longest design pile length of 60m,diameter of 550mm and 600mm, connected by 4 piles of 15m, the length-diameter ratio was more than 100. Beneficial exploration was made on construction of super-long pre-stressed tube pile in sand and silt layer based on this case in Hangzhou City.