2024 Volume 80 Issue 18 Article ID: 24-18156
A new measurement system using optical fibers has been developed for the accurate placement of steel pipe sheet piles in construction projects. Conventional control methods do not assume deformation of steel pipe sheet piles in water or soil, but in reality, deformation may occur due to the weight of the piles and the influence of the ground. This technique directly measures the deflection of steel pipe sheet piles, and its applicability was verified through field demonstrations and laboratory operational checks. A combined optical fiber and laser measurement system was welded to steel pipe sheet piles to measure the direction and amount of deflection in real time. Initial field demonstrations confirmed the deformation of the steel pipe sheet piles in response to changes in soil properties. Additional field demonstrations on long steel piles showed no deflection during the measurement but presented new challenges unique to long steel piles. Further work will be done to verify the accuracy and improve the measurement system to more accurately determine the deflection.
