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随着高层建筑的增多,对于基础部分的处理要求越来越高,桩基础的应用逐渐广泛。桩基按照成桩工艺主要分为管桩和现场灌注桩,其中管桩因其成桩速度快,承载力高且造价低廉而被广泛应用。近些年,科研人员为了提高管桩的承载力和抗剪切能力,采取预应力技术来制作预应力管桩,大大提高了桩身的受力性能。但是由于管桩施工工艺和设备的原因,经常会出现各种质量问题,以浮桩现象最为显著。本文重点研究预应力管桩的浮桩问题产生的原因、处理方法和复打技术的应用。
With the increase of high-rise buildings, the processing requirements for the foundation parts are getting higher and higher, and the pile foundation is widely used. Piles in accordance with the pile into the process is mainly divided into pipe piles and on-site bored piles, of which pipe pile because of its pile speed, high bearing capacity and low cost has been widely used. In recent years, researchers in order to improve the bearing capacity and shear resistance of pipe piles, the use of prestressed technology to produce prestressed pipe piles, greatly enhance the pile’s performance. However, due to the construction process of pipe piles and equipment, various quality problems often occur, so that the phenomenon of floating piles is the most obvious. This paper focuses on the reasons for prestressed pipe pile floating pile problems, treatment methods and the application of re-strike technology.