渗流作用下特拉锚垫对土质岸坡的防护研究  

Protection of terra block mat on soil bank slope under action of seepage

作　　者：付旭辉[1] 龚敖 刘志庆 田佳慧 唐定丹 FU Xu-hui;GONG Ao;LIU Zhi-qing;TIAN Jia-hui;TANG Ding-dan(National Inland Waterway Rehabilitation Engineering and Technology Research Center,Chongqing Jiaotong University,Chongqing 400074,China;Water Affairs Bureau of Yuechi County,Guang an 638399,China)

机构地区：[1]重庆交通大学,国家内河航道整治工程技术研究中心,重庆400074 [2]四川省广安市岳池县水务局,四川广安638399

出　　处：《水运工程》2022年第9期161-165,共5页Port & Waterway Engineering

基　　金：重庆市技术创新与应用示范专项重点研发项目(cstc2018jszx-zdyfxmX0021-05);重庆市教育委员会“成渝地区双城经济圈建设”科技创新项目(KJCXZD2020030);贵州省交通运输厅科技项目(GZJT2021-221-012)。

摘　　要：三峡水库常年在145~175 m水位之间运行,库区岸坡被周期性淹没与出露。库水位消落过程引起土质岸坡渗流,泥沙的起动更加容易且加剧了库岸侵蚀,严重的地方甚至出现岸坡失稳现象。以三峡库区土质岸坡为研究对象,针对新型生态护坡结构——特拉锚垫护坡的特点,采用室内概化模型试验,研究特拉锚垫在渗流作用下的防护性能。通过渗流作用下的水流冲刷试验,分析特拉锚垫的保土抗冲性能。试验结果表明:特拉锚垫具备明显的抗侵蚀性能;无渗流条件下水流侵蚀强度平均减小83.15%,在渗流作用下水流侵蚀强度平均减小88.15%。The three Gorges Reservoir runs at the water level of 145-175 m all year round,and the bank slopes in the reservoir area are periodically submerged and exposed.The fall of the water level in reservoir causes the seepage of the soil bank slope,and the sediment is easier to start and aggravate the erosion of the reservoir bank.The bank slope is unstable in serious places.Taking the soil bank slope in the Three Gorges Reservoir area as the research object,aiming at the characteristics of the new ecological slope protection structure—terra block mat slope protection,the indoor generalized model test is used to study the protective performance of the terra block mat under the action of seepage.The soil—retaining and anti-scour performance of terra block mat is analysed through water scouring test under seepage action.The test results show that the terra block mat has good soil retention and anti-erosion performance;water flow erosion intensity is reduced by an average of 83.15%under the condition of no seepage,and is reduced by an average of 88.15%under the action of seepage.

关 键 词：特拉锚垫 渗流 岸坡侵蚀 水流侵蚀强度 

分 类 号：U617.8[交通运输工程—船舶及航道工程]