摘要
被动柔性网广泛应用于崩塌碎屑流等地质灾害的防护工程中。但是碎屑流被动防护网的结构和安装形式在工程和研究中仍不统一,容易造成实际工程中的选型错误以及计算理论在工程应用中误用。将碎屑流灾害划分为坡面碎屑流和沟道碎屑流两种灾害类型,对这两种灾害类型对应的柔性网结构和安装特征进行了野外调查和力学理论分析。分析结果表明,柔性网主副网结构、柔性网安装倾角和柔性网的安装位置是目前研究和工程应用中被忽略的问题。柔性网结构和安装特征对碎屑流的动荷载和静荷载具有重要的影响。在碎屑流物理模型试验中,不仅需要考虑柔性网安装方式对碎屑流运动无量纲数的影响,还需要考虑柔性网结构的功能相似问题。本文对碎屑流柔性网的工程应用和理论研究均具有一定的指导意义。
Flexible barriers are widely used for protection projects for geological disasters such as collapse and granular flow.However,the structure and installation form of the passive flexible barriers are still not unified in engineering and research,usually leading to selection errors in actual engineering and misuse of calculation theory in engineering applications.The granular flow disasters are divided into slope granular flow and gully granular flow.Field investigation and mechanical theory analysis of the flexible barrier structure and installation characteristics corresponding to these two disaster types were carried out.The analysis results show that the main and auxiliary network structure of the flexible barrier,the installation inclination of the flexible barrier,and the installation position of the flexible barrier are the problems that are usually ignored in the current research and engineering applications.The structure and installation characteristics of the flexible barrier significantly influence the dynamic and static loads.In the granular flow physical model test,both the influence of the installation method of the flexible barrier on the dimensionless number of the movement of the granular flow and the functional similarity of the flexible barrier structure needs to be considered.This article has certain guiding significance for the engineering application and theoretical research of the granular flow flexible barriers.
作者
肖思友
覃超
李殿鑫
马情瑶
侯永忠
Xiao Siyou;Qin Chao;Li Dianxin;Ma Qingyao;Hou Yongzhong(School of Mining&Civil Engineering,Liupanshui Normal University,Liupanshui,Guizhou 553004,P.R.China;Institute of Mountain Hazards and Environment,CAS,Chengdu 610041,P.R.China;College of Resources and Environment Engineering,Guiyang,550025,P.R.China)
出处
《地下空间与工程学报》
CSCD
北大核心
2021年第S02期1051-1060,共10页
Chinese Journal of Underground Space and Engineering
基金
贵州省教育厅自然科学基金(黔教合KY字[2018]380号,黔教合KY字[2018]383号)
中国科学院战略性先导科技专项(A类)(XDA20030301)
关键词
柔性网
碎屑流
沟道
坡面
冲击力
相似性
flexible barrier
granular flow
gully
slope
impact force
similarity
