多种检测方法在大直径灌注桩桩身完整性检测中的综合应用  

Comprehensive application of multiple testing methods in the integrity testing oflarge-diameter cast-in-situ pile

作　　者：曾志崧 ZENG Zhisong(Fujian Provincial Institute of Architectural Design and Research Co.,Ltd,Fuzhou 350001)

机构地区：[1]福建省建筑设计研究院有限公司,福建福州350001

出　　处：《福建建筑》2023年第10期71-75,共5页Fujian Architecture & Construction

摘　　要：大直径灌注桩因其不可替代的优点,在工程实践中得到大量应用,但如何准确检测大直径灌注桩的桩身完整性,是工程的难点之一。为此,分析现有大直径灌注桩桩身完整性检测方法,结合具有代表性的工程实例,探讨各种桩身完整性检测方法的特点和优缺点,证明现行规范中声波透射法完整性判定标准的缺陷。基于此指出,工程实践中使用单一完整性检测方法判定大直径灌注桩桩身完整性的风险,应当将多种完整性检测方法综合运用,相互验证,才能准确判定灌注桩桩身完整性。Because of its irreplaceable advantages,large-diameter cast-in-situ piles have been widely used in engineering practice,but how to accurately detect the integrity of large-diameter cast-in-situ piles is one of the difficulties in engineering.To this end,the existing pile integrity testing methods for large diameter cast-in piles are analyzed,and the characteristics,advantages and disadvantages of various pile integrity testing methods are discussed in conjunction with representative engineering examples,so as to prove the shortcomings of the integrity determination of cross-hole sonic logging in the current code.Based on this,it is pointed out that the risk of using a single integrity testing method to determine the pile integrity of large-diameter piles in engineering practice,and multiple integrity testing methods should be utilized comprehensively and verified with each other,in order to accurately determine the integrity of the piles.

关 键 词：大直径灌注桩 桩身完整性 低应变法 声波透射法 钻芯法 综合运用 

分 类 号：TU473.1[建筑科学—结构工程]