传统与新型两类石笼网垫单元体冲刷试验研究  

Experimental study on scouring of traditional and new types of gabion mat cells

作　　者：许奥 周成[1] 黄良誉 何宁[2] 钟启明[2] 张桂荣[2] XU Ao;ZHOU Cheng;HUANG Liangyu;HE Ning;ZHONG Qiming;ZHANG Guirong(College of Water Resource&Hydropower,State Key Laboratory of Hydraulics and Mountain River Engineering,Sichuan University,Chengdu 610065,China;Geotechnical Engineering Department,Nanjing Hydraulic Research Institute,Nanjing 210024,China)

机构地区：[1]四川大学山区河流保护与治理全国重点实验室,四川成都610065 [2]南京水利科学研究院岩土工程研究所,江苏南京210024

出　　处：《岩土工程学报》2024年第S01期43-47,共5页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金联合基金重点支持项目(U2340227,U22A20602)。

摘　　要：传统石笼网垫以网片作为隔断,需耗费大量人力施工,为采用碾压工艺,节省人工,缩短工期,用胶结碎石格构作为隔断设计新型石笼网垫,并开展了传统与新型两类石笼网垫单元体的冲刷试验进行对照。通过设置不同逊径比的石笼网垫单元体冲刷试验,分析对比两类石笼网垫单元体的逊径颗粒流失特性、流速减缓幅度及冲蚀面积随逊径比变化特征,探究石笼网垫最佳逊径比和胶结碎石格构隔断的作用特性,并进一步针对同一尺寸的新型石笼网垫单元体中胶结碎石格构隔断数量的效果开展了冲刷试验研究。结果表明:两类石笼网垫单元体逊径流失量、减缓冲刷流速的能力、冲毁面积都随逊径比增加而增加,传统石笼网垫的逊径比宜为10%~15%,新型石笼网垫的逊径比可在10%~20%;新型石笼网垫中的胶结碎石格构隔断能有效减少逊径颗粒的流失;对于同样试验尺寸的新型石笼网垫单元体,胶结碎石格构隔断数量从1个增至2个时,能显著减少逊径颗粒的流失并缩小冲蚀面积,当格构数量继续增加,则无明显减小。研究结果可为推广少工期、省人工的新型石笼网垫护岸结构的设计与施工提供参考。The traditional gabion mesh mats use the mesh as the partition,which requires a lot of manpower to construct.A new type of gabion mesh mats is designed with cemented gravel latticework as the partition to save labor and shorten the construction period.The scouring tests of two types of gabion mesh mats units are carried out.The characteristics of inferior-diameter ratio(IDR)particle loss,flow rate slowing down and washed-out area with IDR between the traditional and new gabion mesh units are analyzed and compared.The scouring tests on the new type of gabion mesh units with different numbers of cemented rubble lattice partitions under the same size are further conducted.The test results show that loss of the inferior-diameter particles,the ability to slow down the scouring flow rate and the erosion area of traditional and new gabion mesh units increase with the increase of the inferior-diameter ratio.The better inferior-diameter ratio is betwwen 10%and 15%for the traditional gabion mesh,and between 10%and 20%for the new gabion mesh.For the same size of test unit,when the number of cemented gravel lattice partitions in the new gabion mats increases from 1 to 2,the loss of inferior-diameter particles and the erosion area can be reduced significantly.The increase of the number of cemented gravel lattice partitions has no significant reduction effects.The test results may provide a reference for promoting the design and construction of new gabion mesh riparian structures.

关 键 词：石笼网垫 网片隔断 胶结碎石格构隔断 单元体冲刷试验 逊径比 

分 类 号：TU43[建筑科学—岩土工程]