预应力混凝土管桩低应变检测完整性判定的综合分析方法

COMPREHENSIVE ANALYSIS METHOD OF PRESTRESSED CONCRETE PIPE PILE INTEGRITY CLASS DECISION IN LOW STRAIN DYNAMIC TESTING

低应变检测作为完整性检测的普测手段,得到了广泛的应用,但因此涉及的学科较广,对检测人员的要求较高,且因目前工程中广泛使用的预应力混凝土管桩并非严格满足一维杆件理论与平截面假定,增加了该技术的检测难度。通过分析低应变检测的基本原理基础,可进一步探讨预应力混凝土管桩综合分析方法的必要性及具体操作途径;结合若干工程实例,可充分验证上述观点,并证实综合分析方法的必要性与有效性。

As a general survey means of pile integrity,low strain dynamic testing has been widely used now,but low strain dynamic testing is an interdiscipline based on the development of several branches of science,it is quite necessary to have rich practical experience besides solid theoretical knowledge for testing personnel.Theoretical basis of low strain dynamic testing is not suitable for prestressed concrete pipe pile.Based on detailed description of the basic principles of low strain testing,many limitations of low strain test dynamic testing are analyzed by author.The necessity of a comprehensive analysis and specific ways are described.In the end,comprehensive analytical methods necessity and effectiveness is demonstrated by engineering examples.