钻孔灌注桩护壁泥浆对桩基承载性能的影响

为了解钻孔灌注桩护壁泥浆对桩基承载性能的影响,分析了钻孔灌注桩护壁泥浆的功能以及对桩基承载性能影响的机理。通过对国内某大型公路桥梁大量的桩基静载试验结果分析,可以得出结论:护壁泥浆质量的好坏将直接影响到桩端沉渣厚度和桩侧泥皮厚度,进而影响桩基承载性能,因此在计算分析时需要通过合适的方式考虑。最后,总结了优质泥浆的配置原则、配置方法、泥浆施工管理和安排等经验。

Effect of slurry on bearing performance of bored piles

In order to study the effect of slurry on the bearing performance of bored piles,the function and the effect mechanism of slurry were analyzed.Through the analysis on the static load test results of piles of a bridge,some conclusions could be drawn: the quality of slurry would have direct effect on the thickness of settled materials of pile tip and the thickness of slurry skin on piles,and further would have great effect on the bearing performance of bored piles.So the quality of slurry should be in cluded into the bearing performance analysis model of bored piles.Finally,the experiences in principles and methods of preparation,management and arrangement of construction of fine quality slurry were summerized.