长距离调水工程渠道裂隙岩质边坡渗流模拟  

Seepage Simulation of Fractured Rock Slope in Long Distance Water Diversion Project

作　　者：黄兆虎 方攀博 韩延成[1] 王栋[1] 邓晓川 宋广增 赵嘉诚 HUANG Zhao-hu;FANG Pan-bo;HAN Yan-cheng;WANG Dong;DENG Xiao-chuan;SONG Guang-zeng;ZHAO Jia-cheng(University of Jinan,Jinan 250022,Shandong Province,China;Shandong Survey and Design Institute of Water Conservancy Co.,Ltd.,Jinan 250013,Shandong Province,China;Weifang Branch,Center of Shandong Water Transfer Project Operation and Maintenance Center,Weifang 261000,Shandong Province,China)

机构地区：[1]济南大学,山东济南250022 [2]山东省水利勘测设计院有限公司,山东济南250013 [3]山东省调水工程运行维护中心潍坊分中心,山东潍坊261000

出　　处：《中国农村水利水电》2023年第9期135-141,145,共8页China Rural Water and Hydropower

基　　金：国家自然科学基金(42002127);山东省自然科学基金(ZR2017LEE028);国家“十二五”科技支撑计划(2015BAB07B02-6);山东省重点研发计划(2016GSF117038)。

摘　　要：长距离调水工程选址时不可避免地经过裂隙发育地层,地层中裂隙对边坡渗流场有着重要影响,可能诱发渠道产生渗透破坏。以胶东调水工程莱州段部分渠段为研究对象,以实测裂隙分布情况为样本,基于蒙特卡洛法生成随机分布的裂隙网络,采用COMSOL有限元数值计算软件分别基于孔隙模型和裂隙模型开展不同降雨条件下渠道裂隙岩质边坡渗流分析。结果表明,裂隙模型的湿润峰运移速度比孔隙模型快,孔隙水易提前与地下水接触,造成边坡位置地下水位上涨;相同降雨强度、地下水位条件下,裂隙模型的渠道坡脚处水头值较孔隙模型的大,更易造成渠道衬砌板破坏;相同降雨条件下,裂隙的存在使得衬砌板的破坏时间提前,还会扩大破坏范围,降雨强度越大,破坏面积越大。It is inevitable to develop strata through cracks in the site selection of long-distance water transfer projects,and the cracks in the strata have an important effect on the see-through field of slope,which may induce the leakage failure of channels.In Laizhou and partial drainage period of Jiaodong Water Diversion Project as the research object,based on the measured fracture distribution of samples and the Monte Carlo Method to generate the random distribution of fracture network.Finite element numerical calculation software COMSOL model based on pore and fracture model are used to carry out the different rainfall channel fractured rock slope under the condition of seepage analy⁃sis.The results show that the migration speed of the wetting peak in the fracture model is faster than that in the pore model,and the pore wa⁃ter is easy to contact the groundwater in advance,resulting in the rise of the groundwater level at the slope location.Under the same rainfall intensity and groundwater level,the water head value at the foot of the channel slope of the crack model is more than that of the pore model,which is more likely to cause the failure of the channel lining plate.Under the same rainfall condition,the existence of cracks makes the fail⁃ure time of the lining plate advance,and also expands the failure range.The greater the rainfall intensity,the greater the failure area.

关 键 词：裂隙岩体 裂隙网络 降雨入渗 渗流 

分 类 号：TV67[水利工程—水利水电工程]