自平衡法静载试验在闽投营运中心项目中的应用研究

Research on the application of self balance static load test in Fuzhou Fujian Investment and Operation Center Project

自平衡法试验对场地条件要求较低,可用于静载试验和高应变试验无法检测的工况。采用自平衡法可分别得到荷载箱上段阻力与下段阻力,进而得到桩基的极限承载力。为了对类似工程的设计和施工提供参考,详细分析了闽投营运中心项目中自平衡法静载试验的方案比选、试验过程和试验结果,验证自平衡法试验在该工程地质条件下的适用性和AM旋挖扩底灌注桩的承载能力。

Self-balance method test requires lower site conditions,and can be used in some situation that can not be detected by static load test and high strain test.By using the self-balance method,the upper and lower resistance of the load-cell can be obtained respectively,and then the ultimate bearing capacity of the pile foundation can be obtained by calculating.In order to provide reference for the design and construction of similar projects,this Paper comparison the test schemes,test process and test results of self-balance method test in fuzhou fujian investment and operation center project,the applicability of the self-balance method test under such geological conditions and the bearing capacity of AM rotary excavation enlarged bottom cast-in-place pile are verified.