A model for calculating the erosion distance of soft sea cliff under wave loading is established based on the erosion mechanism of soft sea cliff under wave loading and for considering wave hydrodynamic and sea cliff ...A model for calculating the erosion distance of soft sea cliff under wave loading is established based on the erosion mechanism of soft sea cliff under wave loading and for considering wave hydrodynamic and sea cliff material parameters.The model is verified,and the parameters are regressed using an indoor flume experiment.The erosion distances of the sea cliff in the northeast of the Pingtan Island are calculated by the model,and the results are compared with the measured data.The maximum erosion occurs in static water level,the location of the maximum erosion moves up as the wave continues,and the erosion stops when the wave lasts for a period of time.The erosion does not occur until the wave height exceeds a critical value; however,the contribution of large waves to the erosion is not relatively substantial.The calculated erosion distances at two places in the northeast of Pingtan Island are 0.32 m and 0.26 m.展开更多
文摘对福建省平潭岛东北部软质海崖进行现场调查和量测,在约1 km的岸线上发现9处滑塌,滑塌物的堆积距离、堆积高度和滑塌物体积均随海崖高度的增大而增大.滑塌包括剪切破坏和顶部破坏两种类型,剪切破坏的破坏面几乎完全垂直,顶部破坏的破坏面呈L形.针对这两种滑塌类型,分别建立理论计算模型.结果表明:经理论计算模型得到的海蚀槽最大槽深(蚀退距离)为0.51~1.30 m;海崖稳定性随槽深的增大而降低;海崖顶部破坏的滑塌临界水深为0.22~0.61 m.
基金The National Natural Science Foundation of China under contract No.41306051the Natural Science Foundation of Fujian Province of China under contract No.2015J01625
文摘A model for calculating the erosion distance of soft sea cliff under wave loading is established based on the erosion mechanism of soft sea cliff under wave loading and for considering wave hydrodynamic and sea cliff material parameters.The model is verified,and the parameters are regressed using an indoor flume experiment.The erosion distances of the sea cliff in the northeast of the Pingtan Island are calculated by the model,and the results are compared with the measured data.The maximum erosion occurs in static water level,the location of the maximum erosion moves up as the wave continues,and the erosion stops when the wave lasts for a period of time.The erosion does not occur until the wave height exceeds a critical value; however,the contribution of large waves to the erosion is not relatively substantial.The calculated erosion distances at two places in the northeast of Pingtan Island are 0.32 m and 0.26 m.