海蚀槽发育导致的软质海崖滑塌计算与分析  

Collapse Calculation and Analysis of Soft Sea Cliff Induced by Sea-Eroded Notch Development

作　　者：常方强[1] 梁康康 CHANG Fangqiang;LIANG Kangkang(Institute of Geotechnical Engineering,Huaqiao University,Xiamen 361021,China)

机构地区：[1]华侨大学岩土工程研究所,福建厦门361021

出　　处：《华侨大学学报（自然科学版）》2020年第3期299-306,共8页Journal of Huaqiao University(Natural Science)

基　　金：国家自然科学基金资助项目(41306051)。

摘　　要：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.The soft sea cliffs at northeast of Pingtan Island in Fujian Province are investigated and measured in situ.Nine collapses are found on the length of about 1 km cliffs.The deposition distance,deposition height and volume of collapse increase with cliff height.There are two types of collapse:shear failure and top failure.The failure surface of shear failure is almost vertical,and the failure surface of top failure is L-shaped.For both types of collapse,the theoretical calculation models are established.The results show the maximum depths of sea-eroded notch(retrograded distance)are 0.51-1.30 m calculated by the theoretical calculation models.The stability of cliffs decreases with the increase of the depths of sea-eroded notch.The critical water depth of collapse on the top of cliffs are 0.22-0.61 m.

关 键 词：海蚀槽 稳定分析 软质海崖 滑塌 平潭岛 

分 类 号：P753[交通运输工程—港口、海岸及近海工程]