高应变波形拟合法在某工程应用分析与探讨

Analysis and Discussion of High Strain Waveform Fitting Method in a Certain Engineering Application

桩基属于隐蔽工程,一旦桩基础发生事故,处理起来将会比较困难,工程桩的质量检测成为建设工程质量控制的一个关键环节。工程桩的质量检测包含承载力和完整性两个方面的内容,承载力的确定是工程界的重大课题。通过某工程桩基高应变波形拟合法单桩承载力检测及其结果的分析,认为在采集波形准确,拟合参数选取准确的情况下,波形拟合法能够准确测定单桩竖向抗压承载力;对桩侧土弹性变形和桩端土弹性变形取值问题分析探讨,认为二者取值较大时,拟合承载力结果更加准确。

Pile foundation is a concealed project.Once an accident occurs,it will be difficult to deal with.The quality inspection of engineering pile becomes a key link in the quality control of construction project.The quality inspection of engineering piles includes two aspects:bearing capacity and integrity.The determination of bearing capacity is an important subject in engineering field.Based on the analysis of the bearing capacity test of single pile by wave fitting method of high strain of pile foundation and its results,it is considered that the wave fitting method can accurately determine the vertical compressive bearing capacity of single pile under the condition of accurate waveform acquisition and fitting parameters selection.The problem of value selection of elastic deformation of soil around pile and elastic deformation of soil at pile tip is also discussed.It is considered that the result of fitting the bearing capacity is more accurate when the two values are larger.