PHC管桩在基础工程中的应用

Application of PHC pipe pile in foundation works

先张法预应力混凝土管桩(PHC)是采用先张法预应力工艺和离心成型法制成的一种圆筒体细长混凝土预制构件.实际应用表明,该种桩型质量稳定可靠,桩身砼强度高,耐打压性能好,穿透能力强,单桩承载力高,造价相对较低;它对不同沉桩工艺适应性强,吊运方便,接桩快捷,桩长易调整,成桩质量好,检测时间短.

Prestressed high - strength concrete （PHC） pipe pile is a kind of cylindrical and slender precast concrete units which is prepared by pretensioned prestressed technics and centrifugal shaping methods. Actual application indicates that PHC pipe pile has distinct advantages, such as stable and realiable quality, high strength, better resistance of the pressure, good ability of puncturing, high capacity of single pile and lower cost. Additionally, PHC pipe pile is suitable for various pile sinking technology, cinvenient to lift and joint, easy to adjust the pile length. So, the time limit for a project is shortened and the quality of pile is improved.