According to continuous blasting vibration monitoring results carried out on three monitoring points(bottom,middle,and top) at different vertical positions at the same horizontal distance from an underwater blasting project in a channel adjacent to high-rise buildings,the three-dimensional spatial patterns of blast vibration velocity,vibration frequency,and vibration energy were analyzed,and the elevation effect mechanism of blasting vibrations on high-rise buildings was explored.The analysis results show that: (1)Blasting vibration velocity is influenced by the combined action of the elliptical motion of Rayleigh wave,energy attenuation,and whiplash effect.It presents a significant three-dimensional spatial effect in the propagation among high-rise buildings,in which the vertical direction is dominated by Rayleigh wave elliptical motion and whiplash effect,showing a significant elevation amplification effect,while the horizontal and tangential directions are dominated by Rayleigh wave elliptical motion and energy attenuation,exhibiting an elevation attenuation effect.(2)The propagation of blasting vibration frequency in high-rise building is mainly affected by the vertical distance from the wall,showing an elevation attenuation effect in all three directions.(3)The distribution of vertical blasting vibration energy presents a significant elevation amplification effect from the bottom,middle to the top of the building.Specifically,the high-frequency energy proportion shows an elevation attenuation effect in the middle and top relative to the bottom,while the low-frequency energy proportion exhibits an elevation amplification effect in the middle and top relative to the bottom.