桩体完整性检测中低应变反射波法误判因素研究  

The Research of Pile Integrity Testing Misjudgment Factors in Low Strain Reflected Wave Method

作　　者：赵蕴林[1] 吴磊[1] 吕航[1] 刘力豪[1] 

机构地区：[1]四川理工学院土木工程学院,四川自贡643000

出　　处：《四川理工学院学报（自然科学版）》2017年第2期68-70,共3页Journal of Sichuan University of Science & Engineering(Natural Science Edition)

摘　　要：近年来,低应变反射波法由于其测试方便、速度快和价格相对较低等特点得到了广泛使用,但其技术本身的一些问题,如测试盲区、理论缺陷、微裂缝影响、外界因素等对最后的测试波形产生严重的影响,最终导致对基桩缺陷的误判,给工程带来较大损失。通过工程实例分别探讨了测试盲区、理论缺陷、微裂缝、外界因素、有效检测深度等对于低应变检测结果发生误判的可能,并就桩基检测中易出现误判的各种情况进行分析,总结出防止严重误判的方法。只有在全面了解各种影响检测技术准确性的因素和客观正确分析检测结果的基础上,不断探索才能在实践中不断积累经验,在最大程度上减少误判的发生。In recent years, because of the convenience, wave method has been widely used. But some problems of the fast test speed and relatively low price, low strata retlectlon technology, such as test blind area, defect theory, microfracture and external factors, have a significant impact on the final test waveform, eventually lead to the defect of pile and bring bigger loss to engineering. In this paper, through the project example, the test blind area, theoretical defects, microfracture, external factors, such as effective detecting depth of the possibility of miscalculation for low strain test result were respectively discussed, the pile foundation detection misjudgment of all kinds of conditions which were liable to occur were analyzed, and the method to prevent serious mistakes were summarized. Results show that only in the full understanding of all kinds of fac- tors influencing the accuracy of the detection technology, and with the objective correct analysis on the basis of test results, then maintain a forever learning attitude to accumulate experience in practice, misjudgment can be reduced.

关 键 词：测试盲区 理论缺陷 外界因素 

分 类 号：TU223.6[建筑科学—建筑设计及理论]