Applied Research On Testing Of Pile Integrity By Low Strain Reflection Wave Method

Testing of foundation piles is an important approach to insure the quality of construction, The low strain reflection wave method is a useful method for detecting the integrity of piles. It is very popular in engineering, it is beneficial to carry out research on using the low strain reflection wave method.The main content of this thesis are as follows:(1)Introducing the main methods of foundation pile testing, briefly looking back the history of the dynamic testing, summing up the superiority of the low strain reflection wave method.(2)Describing the basic theory of the stress wave reflection detection, introducing the basic knowledge of signal collection and analysis, providing the theoretical basis for the research.(3)In specific cases illustrating the characteristics and running methods of the low strain wave form with different kinds of defective piles, working over the influence of wave-speed and spot test technique on low strain testing, then concluding the law.By discussing basic theories of the low strain reflection wave method, this thesis analyzes a number of problems in engineering practices in order to make the testing more accurate and efficient, so as to ensure the quality of the project.