群桩基础安全监测中噪声的分析及剥离

uring the safety monitoring for pile group foundation, monitoring data contain a lot of noise factors. Tide changes affect the buoyancy, and temperature not only directly affects the stress distribution on observation sites, but also brings the stress change of foundation by affecting the upper parts’ the structure deformation. Noise is essential for evaluating the safety and reliability of foundation. Based on the actual safety monitoring data from pile foundation and cable tower, the direct effects of temperature on the stress distribution of pile group foundation are analyzed. In addition，the upper structure is affected by sunshine and temperature, leading that the stress in the lower part of foundation is changed. Then by using the correction method and wavelet theory, noise effects such as temperature are eliminated, and the safety of large scale pile foundation is analyzed.