摘要
堤后取土形成的坑塘将对堤防渗流稳定产生不利影响,文中结合黑龙江中游某堤后取土堤防工程,采用Autobank软件进行有限元计算,首先通过试算确定了能够满足计算精度的模型范围,然后重点研究了开采宽度、弱透水覆盖层保留厚度、开采区与堤防距离等料场开采因素,系统分析了各因素对背水侧堤脚处及料场开采区弱透水层底部承压水头的影响和对渗流量的影响情况,得到各因素影响规律,从而提出堤后取土的控制原则。
The pot-pool formed by soil extraction behind the dike will have adverse effect on the seepage stability of the dike.In this paper,the Autobank software is used for finite element calculation of a dike in middle reaches of Heilongjiang River.Firstly,the author determines the range of model that can satisfy the calculation accuracy through trial calculation,and focuses on the excavating factors such as excavating width,retaining thickness of weakly permeable overburden,and distance between excavating area and dike.Through the systematic analysis of the influence of various factors on the confined water head and seepage flow at the foot of the backwater embankment and the bottom of the weak permeable layer in the excavating area of the material yard,and the influence law of each factor is obtained,and the control principle of soil extraction behind the embankment is put forward.
作者
柴明海
卢玉海
CHAI Ming-hai;LU Yu-hai
出处
《东北水利水电》
2021年第12期44-46,49,72,共5页
Water Resources & Hydropower of Northeast China
基金
国家重点研发计划(2018YFC0407304,黑龙江重点河段防洪安全和岛屿稳定治理技术)
关键词
堤后取土
渗流
影响因素
双层地基
soil extraction behind embankment
seepage
influence factors
double-layered foundation
