灌注桩承载特性测试技术研究进展  

Research Progress on Testing Technology of Bearing Characteristics of Cast-in-place Pile

作　　者：白晓宇[1] 吴泽坤 桑松魁 李飞 张鹏飞 蒋水兵 付林 包希吉 王保栋 王立彬 BAI Xiao-yu;WU Ze-kun;SANG Song-kui;LI Fei;ZHANG Peng-fei;JIANG Shui-bing;FU Lin;BAO Xi-ji;WANG Bao-dong;WANG Li-bin(School of Civil Engineering,Qingdao University of Technology,Qingdao 266520,China;Changda Building Technology Co.,Ltd.,Weifang 261000,China;The Second Construction Limited Company of China Construction Eighth Engineering Division,Jinan 250014,China;China Railway Construction Group Co.,Ltd.,Beijing 100040,China;The Development Construction Co.Ltd.,of China Construction Eighth Engineering Division,Qingdao 266061,China)

机构地区：[1]青岛理工大学土木工程学院,青岛266520 [2]昌大建筑科技有限公司,潍坊261000 [3]中建八局第二建设有限公司,济南250014 [4]中铁建设集团有限公司,北京100040 [5]中建八局发展建设有限公司,青岛266061

出　　处：《科学技术与工程》2023年第32期13649-13664,共16页Science Technology and Engineering

基　　金：国家自然科学基金(51778312,51708316);山东省自然科学基金重点项目(ZR2020KE009);山东省博士后创新项目(201903043)。

摘　　要：灌注桩凭借承载力高、施工工艺成熟、施工机械化程度高等优点被广泛应用于城市建设中。有效确定灌注桩的承载特性和充分掌握承载特性的测试方法,是确保建(构)筑物安全使用的前提和保证。为此,围绕灌注桩承载特性和承载特性关键测试方法进行了梳理,总结和评述中外相关的最新研究现状,系统归纳灌注桩承载特性的影响因素和荷载传递规律,重点介绍低应变法、声波透射法、高应变法、静载荷试验、自平衡试验等灌注桩完整性和承载特性测试方法的原理与特点,简述分布式光纤测试技术在灌注桩承载性能测试方面的最新研究进展,综合现有研究成果对灌注桩桩端阻力、桩侧摩阻力以及桩身荷载传递规律进行概述与分析,最后基于目前灌注桩承载特性及测试方法的研究不足与缺陷,提出了具有针对性的建议措施以促进灌注桩承载特性测试方法的进步与发展。Cast-in-place pile is widely used in urban construction because of its advantages of high bearing capacity,mature construction technology and high degree of construction mechanization.To determine the bearing characteristics of cast-in-place piles effectively and to master the testing methods of bearing characteristics are the prerequisite and guarantee for the safe use of structures.For this reason,focusing on the bearing characteristics of cast-in piles and the key testing methods of bearing characteristics,the latest research status at home and abroad was summarized and reviewed.The influencing factors and load transfer rules of cast-in-place pile bearing characteristics were systematically summarized.The principle and characteristics of testing methods for integrity and bearing characteristics of cast-pile such as low strain method,acoustic transmission method,high strain method,static load test and self-balancing test were introduced.The latest research progress of distributed optical fiber testing technology in load bearing performance testing of cast-in-place piles was briefly introduced.Based on the existing research results,the end resistance,side friction resistance and load transfer rule of pile were summarized and analyzed.Finally,based on the current research on the bearing characteristics of cast-in-place piles and testing methods,there were deficiencies and defects.Some suggestions and measures were put forward to promote the progress and development of testing methods for bearing characteristics of cast-in-situ piles.

关 键 词：灌注桩 承载特性 低应变法 声波透射法 高应变法 静载试验法 分布式光纤技术 

分 类 号：TU473[建筑科学—结构工程]