APPLICATION OF FIBER OPTICS DETECTION TECHNIQUE TO TESTING STEEL-PIPE PILES ON-SEA

The content of piles test contains pile integrity testing and bearing capacity testing. Its purpose is to determine parameters and choose proper method and device for piles sinking. It needs to take climate and geological conditions in the area of piles test into consideration. Choosing a suitable detection is important to improve parameter accuracy and reduce cost of piles. Vertical static loading test is a reliable analysis of bearing capacity of piles. The methods of pile integrity testing include analysis of core boring, low strain testing, and high strain testing and ultrasonic transmission method. The accuracy of those methods are affected in testing piles on-sea. Fiber optics detection is simple to operate. The accuracy is high. Fiber optics detection is based on BOTDR and FBG theory. But there is just few engineering cases referring to piles test on-sea with fiber optics detection This paper shows an engineering case on piles test referring to three methods. They are the pile integrity testing, fiber optics detection and high strain testing. The successful pile test states the fiber optics detection as a new method is reliable and high accuracy.