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作为一种常见的桩型,预应力管桩具有强度高、施工速度快、承压性能好等特点。适用于一般黏性土及填土、淤泥和淤泥质土、粉土、非自重湿陷性黄土等土层中使用,大量应用于各种建筑的基础中。预应力混凝土管桩在施打过程中,由于经受高温能量桩锤的反复冲击,在桩顶部和桩身均产生打桩应力,而且应力峰值波动较大,有时还会超过桩静态极限承载力的允许应力,使桩顶部的混凝土在打桩过程中受到破坏或桩身出现环向裂缝,致使打桩中断,甚至危及桩的完
As a common type of pile, prestressed pipe pile with high strength, construction speed, pressure performance and so on. It is suitable for general clay and soil filling, silt and muddy soil, silt, non-weight collapsible loess and other soil layers, and is widely used in the foundations of various buildings. During the process of prestressed concrete pipe piles, due to repeated impact of high temperature energy pile hammer, piling stress is generated on the top of piles and pile body, and the stress peak fluctuates greatly, sometimes exceeding the allowable static ultimate capacity of piles Stress, so that the top of the pile of concrete in the process of piling damaged or ring appear to crack, resulting in piling interrupted, or even endanger the pile End