Abstract: The present invention discloses a pile foundation permeable breakwater with variable permeability, comprising: two rows of prefabricated pile foundations. The tops of the prefabricated pile foundations are fixedly provided with a prefabricated panel. The top of the prefabricated panel is provided with a wave wall and a breast wall. The prefabricated pile foundations are integrally connected with fixed wave breaking plates; sliding rails are installed correspondingly on the top and the bottom between every two adjacent prefabricated pile foundations in the same row; and movable wave breaking plates are slidably connected between each pair of sliding rails. A control system for controlling the slide of the movable wave breaking plates is installed on the prefabricated panel. The present invention also discloses a construction method of the pile foundation permeable breakwater with variable permeability.

Abstract: The present invention discloses a pile foundation permeable breakwater with variable permeability, comprising: two rows of prefabricated pile foundations. The tops of the prefabricated pile foundations are fixedly provided with a prefabricated panel. The top of the prefabricated panel is provided with a wave wall and a breast wall. The prefabricated pile foundations are integrally connected with fixed wave breaking plates; sliding rails are installed correspondingly on the top and the bottom between every two adjacent prefabricated pile foundations in the same row; and movable wave breaking plates are slidably connected between each pair of sliding rails. A control system for controlling the slide of the movable wave breaking plates is installed on the prefabricated panel. The present invention also discloses a construction method of the pile foundation permeable breakwater with variable permeability.

Abstract: The present application relates to a method for selecting a wave height threshold, based on a target location, original wave height samples are acquired, and a wave height threshold interval are obtained; combined with wave height threshold and based on GPD and specified return period, a design wave height Hsi,j corresponding to each threshold within the wave height threshold interval is calculated according to the sample wave height values which are greater that the threshold; a difference is calculated to obtain a stable threshold interval, and a threshold within the stable threshold interval is selected as a reasonable threshold for design wave height estimation. In this method, the stability of estimated values can be determined directly and objectively to realize wave height threshold selection.

Abstract: The present application relates to a method for selecting a wave height threshold, based on a target location, original wave height samples are acquired, and a wave height threshold interval are obtained; combined with wave height threshold and based on GPD and specified return period, a design wave height Hsi,j corresponding to each threshold within the wave height threshold interval is calculated according to the sample wave height values which are greater that the threshold; a difference is calculated to obtain a stable threshold interval, and a threshold within the stable threshold interval is selected as a reasonable threshold for design wave height estimation. In this method, the stability of estimated values can be determined directly and objectively to realize wave height threshold selection.