基桩检测中声测管不平行问题及桩身完整性评估方法综述  

Review on Non-parallel Problem of Acoustic Pipes and Evaluation Methods of Pile Integrity in Foundation Pile Detection

作　　者：庞军 吴红刚 牌立芳 宁峙名 徐汶瀚 PANG Jun;WU Honggang;PAI Lifang;NING Zhiming;XU Wenhan(School of Civil Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;Northwest Research Institute Co.,Ltd.of China Railway Engineering Corporation,Lanzhou 730030,China;School of Civil Engineering and Architecture,Southwest University of Science and Technology,Mianyang 621010,China)

机构地区：[1]兰州交通大学土木工程学院,兰州730070 [2]中铁西北科学研究院有限公司,兰州730030 [3]西南科技大学土木工程与建筑学院,四川绵阳621010

出　　处：《铁道标准设计》2024年第7期78-91,共14页Railway Standard Design

基　　金：国家重点研发计划资助项目(2018YFC1504901);甘肃省自然科学基金项目(145RJZA068);中铁隧道局集团有限公司科技开发项目(FWHT-LZJLBGCB-013)。

摘　　要：基桩检测中桩身完整性的评估很有必要,声波透射法因优势突出而被广泛应用于基桩完整性检测领域。为系统地了解和认识声波透射法在基桩完整性检测领域中的研究进展和不足之处,首先,有序梳理了1997-2021年间的相关文献,整理归纳了声波透射法在基桩检测领域中的主要研究内容和发展历程,结果发现,声测管不平行问题和桩身完整性评估方法的选用是影响基桩完整性评估结果的关键因素;其次,按照先识别、再修正、后评估的逻辑顺序,阐述了声测管不平行问题对桩身完整性评估结果的影响,分析声测管不平行现象有别于桩身缺陷的声学参数曲线识别特征,总结概括了专家学者提出的声测管不平行修正方法和桩身完整性评估方法的种类、原理、适用性和优缺点,结果发现,目前修正方法只能减小却不能消除声测管不平行问题对评估结果的影响,且目前基桩完整性评估方法的精确性、可操作性及经济性间平衡性较差;最后,基于研究现状不足和时代技术发展,提出声测管不平行修正方法和桩身完整性评估方法应向智能化方向发展的建议,以期对基桩完整性检测的研究有所裨益。In foundation pile detection,it is necessary to evaluate the pile integrity.Cross-hole sonic logging is widely used in the field of foundation pile integrity detection due to its prominent advantages.In order to systematically understand and recognize the research progress and shortcomings of cross-hole sonic logging in the field of foundation pile detection,this paper firstly sorts out the relevant literature from 1997 to 2021,summarizes the main research contents and development history of cross-hole sonic logging in the field of foundation pile detection.The results show that the non-parallel problem of sonic logging pipe and the selection of pile integrity evaluation method are the key factors affecting the evaluation results of foundation pile integrity.Secondly,according to the logical sequence of first identification,then correction and last evaluation,the paper expounds the influence of sonic logging pipe non-parallelism on the evaluation results of pile integrity,analyzes the characteristics of acoustic parameter curves identification of sonic logging pipe non-parallelism being different from pile defects,and summarizes the types,principles,applicability,advantages and disadvantages of the sonic logging pipe non-parallel correction method and pile integrity evaluation method proposed by experts and scholars.The results show that the current correction method can only reduce the influence of the sonic logging pipe non-parallel phenomenon on the evaluation results but not eliminate it.Besides,the accuracy,operability and economy of the current evaluation method of foundation pile integrity are inefficient.Finally,suggestions are put forward that the non-parallel correction method of sonic logging pipe and the pile integrity evaluation method should be developed towards the intelligence due to the lack of research status and the development of technology,so as to be beneficial to the research of foundation pile integrity detection.

关 键 词：基桩检测 声波透射法 声测管不平行问题 桩身完整性评估方法 综述 

分 类 号：TU473.1[建筑科学—结构工程]