通过对比试验简要分析CFG桩龄期对低应变检测的影响

A breif analysis on the impact of the age of CFG pile on low strain detection by the comparison experiment

本文通过对相同地质条件下、不同龄期的CFG桩进行低应变反射波法对比测试,从不同龄期测试波速、桩身特征反射波强弱等方面,分析CFG桩龄期对低应变检测的影响。以期在保证检测质量的前提下,找到适宜的成桩后检测时间,以提高效率、节约成本。本文通过对比测试分析,提出以桩身龄期决定CFG桩低应变检测时间时,应适当增加受检桩的龄期,最好不少于14d。

In the paper, the comparison experiments are conducted by using low strain reflection wave method on the same geology condtions and different CFG piles with different ages, to analysis the impact of the age of CFG pile on low strain detection, from the aspects of detecting wave velocity under different age and the intensity of reflection wave of the pile. It is hopped that under the premise of guaaranteeing the detection quality, the appropriate detection time after filling pile can be found to improve the effeciency and save costs. By the analysis of the comparison experiments, the paper concludes that, as the time of low strain detection on CFG pile is determined by the age of pile, it is suggested to increase the age of test pile appropriately, and had better be not less than fourteen days.