›› 2017, Vol. 31 ›› Issue (5): 648-650.

• 工程实录 • 上一篇    下一篇

大直径长桩低应变检测若干问题探讨

马 健,孟新秋,刘 丽   

  1. (北京泰斯特工程检测有限公司,北京 102600)
  • 收稿日期:2016-09-20 修回日期:2016-10-13 出版日期:2017-10-20 发布日期:2017-10-29
  • 作者简介:马 健(1991-),男,助理工程师,研究方向为岩土工程、地基处理与检测等。

Aspects of Low Stress Integrity Testing on Large Diameter Long Bored Piles

MA Jian, MENG Xinqiu, LIU Li   

  1. (Beijing Taisite Engineering Testing Co., Ltd., Beijing 102600)
  • Received:2016-09-20 Revised:2016-10-13 Online:2017-10-20 Published:2017-10-29

摘要: 以铁路桥基基桩检测为例,采用低应变检测方法进行了大量现场检测。针对低应变检测中经常遇见的两个问题:浅部缺陷和桩底反射不明显,进行了采用不同激振方式的对比检测,并对检测结果进行分析,结果显示:在大直径长灌注桩低应变检测中,合理使用高频应力波和低频应力波并结合工程实际,可以解决浅部缺陷和桩底反射不明显问题,相关方法对以后类似工程检测有借鉴意义。

关键词: 大直径长灌注桩, 低应变检测, 浅部缺陷, 桩底反射

Abstract: This paper presents low stress integrity test experience on large diameter long bored concrete piles supporting railroad bridges. Two frequently encountered issues are discussed: shallow deflect and weak reflection from the bottom of piles. To resolve these problems, different citation methods could be used for the integrity tests. The results indicate that appropriate high and low frequency stress waves used in the test can effectively overcome these issues.

Key words: Large Diameter Long bored pile, Low Stress Test, Shallow Defects, Pile Bottom Reflections