静压管桩技术在沈阳地区的应用

介绍了静力压入预应力混凝土管桩的沉桩机理及适用范围．根据沈阳市典型地区的试验场地工程地质条件和现场静载试验的结果，得出了静压预应力混凝土管桩的极限承载力，建立了沈阳地区桩长在7～14m范围内，桩端持力层为中粗砂和圆砾情况的极限承载力与施工终压力的关系，并给出了典型试桩的Q-s曲线、s-logQ曲线和压桩力随入土深度变化的曲线．给出了静压预应力混凝土管桩承载力特征值的计算方法．

Application of static pressure concrete pipe pile in Shenyang

The characteristics of static pressure concrete pipe pile are introduced.According to the geological conditions of engineering test site typical of Shenyang area and the result of static load test,the ultimate bearing capacity of static pressure and pre-stressed concrete pipe pile is achieved.The relationship between the ultimate bearing capacity and final pressure is established,which shows that the length of pile is between 7 and 14 miles and the bearing stratum is gravelly soil or medium sand and coarse sand.Not only the Q-s curve and s-logQ curve of typical piles are provided but also the relationship between the pressure on pile and the depth of the pile entering into soil and the calculating method of the characteristic values of bearing capacity of pre-stressed concrete pipe pile are obtained.