陈辉 张延亿 马吉刚 邓刚 赵守勤 李来祥

摘 要：為解决高地下水位渠道在遭遇强降雨时容易发生衬砌破坏的问题，深入研究了不同降雨条件下高地下水位渠道内部结构性态的响应规律。基于非饱和渗流理论，对4种不同降雨类型条件下渠道内部的渗压（总水头）情况进行了分析研究，得出对衬砌结构安全最不利的降雨类型是前锋型降雨和均匀型降雨。在渗流分析的基础上，基于Morgenstern-Price法对渠道边坡进行了稳定分析，结果表明随降雨的持续，各种降雨类型条件下边坡安全系数均表现为持续减小。同时前锋型和均匀型降雨条件下发生滑坡的风险大于其他两种雨型。因此，从渗流和边坡稳定计算角度看，应重点关注前锋型和均匀型降雨。在此基础上，对渠道排水设计进行了优化改进，所提方案可有效降低渠道内部的渗流压力。

关键词：降雨类型;渗流;边坡稳定;高地下水位;渠道

中图分类号：TV91

文献标志码：A

doi：10.3969/j.issn.1000-1379.2021.11.023

引用格式：陈辉，张延亿，马吉刚，等.不同降雨类型下高地下水位渠道性态数值模拟研究[J].人民黄河，2021，43（11）：126-129，136.

Numerical Simulation of High Groundwater Level Channel Behavior Under Different Rainfall Types

CHEN Hui  ZHANG Yanyi  MA Jigang  DENG Gang  ZHAO Shouqin  LI Laixiang3

（1.State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin， China Institute of Water Resources and

Hydropower Research， Beijing 100038， China; 2.Key Laboratory of Construction and Safety of Hydraulic Engineering

of Ministry of Water Resources， China Institute of Water Resources and Hydropower Research， Beijing 100038， China;

3.Water Transfer Project Operation and Maintenance Center of Shandong Province， Jinan 250100， China）

Abstract： In order to solve the adverse effect that the lining of high groundwater level channels was prone to damage when subjected to heavy rainfall， the response law of internal structural state of high groundwater level channels under different rainfall conditions was studied. Based on the non-seepage seepage theory， the seepage pressure （total water head） in the tunnel under four different rainfall types was analyzed and studied. The results show that the most unfavorable rainfall types for the lining structure safety are the frontal rainfall and uniform type rainfall. On the basis of seepage analysis and Morgenstern-Price method， the slope stability analysis of the channel slope was carried out. The results show that the slope safety factor decreases continuously with the continuous rainfall. At the same time， the risks of landslide about front type and uniform type rainfall are greater than that in the other two types of rainfall. Therefore we should pay more attention to the front type and uniform type rainfall from the perspective of seepage and slope stability calculation. On this basis， the drainage design of the channel is further optimized and improved， and the proposed scheme can effectively reduce the seepage pressure inside the channel. The research results can provide reference for slope and seepage control design of high groundwater level channels.

Key words： rainfall types; seepage; slope stability; high groundwater level; channel

在大流量、长距离供水或灌溉渠道的布置和結构设计中，受地形地质条件等的影响，常遇到渠道穿越高地下水位区域的情况。高地下水位对渠坡和衬砌结构的稳定性均可能产生一定的影响，而降雨又是影响高地下水位渠道边坡和衬砌结构安全的重要因素之一。大量研究者已对降雨引起的边坡渗流特性及稳定性变化进行了……