摘要
为探究胶东调水明渠基岩深挖方段边坡排水减压规律,结合水文地质勘探参数和渠道断面尺寸,通过设计砂槽物理模型,进行了无排水系统、边坡单排水系统、渠底单排水系统、渠底和渠坡双排水系统等各种方案的排水减压试验。结果表明:历史最高地下水位下,对于同一排水系统,有集水管侧比无集水管侧的扬压力降低29.0%~43.7%;而对于不同排水系统,渠底及边坡双排水系统减压效果最优,相对于有集水管无排水系统减压幅度可达37.9%,相对于无集水管时减压幅度达55.2%。不同排水系统中,渠底及边坡双排水系统排水效果最优,分别是边坡排水系统和渠底单排水系统的2.5倍和1.1倍。渠底及边坡双排水系统中,渠底排水装置排水量占82.02%~90.91%,远大于边坡单排水装置排水量。基于试验结果,对裂隙发育的基岩深挖方渠段,宜设计纵横排水暗管与排水装置连接的渠底和边坡网络排水系统,减少衬砌结构的扬压破坏。
In order to explore the law of drainage and decompression of the slope in the deep excavated rocky section of a channel in Jiaodong Water Diversion Project,according to the hydrogeological exploration parameters and the channel section size,a sand tank experimental model was designed,and the drainage and decompression experiments of various schemes such as no drainage system,single slope drainage system,single bottom drainage system,and dual drainage system at the bottom and slope were carried out.The results showed that under the condition of the highest recorded groundwater level,for the same drainage system,the uplift pressure of the side with catchment pipe was 29.0%~43.7%lower than that of the side without catchment pipe.For different drainage systems,the dual drainage system at the bottom and slope of the channel had the best decompression effect,the decompression range can reach 37.9%compared with the non-drainage system but with the catchment pipe,and the decompression range can reach 55.2%compared with the non-catchment pipe.Among different drainage systems,the drainage effect of the double drainage system was the best,which was 2.5 times and 1.1 times than that of the single slope drainage system and the single bottom drainage respectively.In the double drainage system,the drainage volume of channel bottom drainage device accounted for 82.02%~90.91%,which was much larger than that of slope drainage device.Based on the experimental results,it is concluded that for the deep excavated rocky channel section with developed cracks,it is appropriate to design a dual drainage system of channel bottom and slope network connected by vertical and horizontal drainage pipes and drainage devices to reduce the uplift pressure damage of lining structure.
作者
王兵
孙佑光
李文良
孙秀秀
王维平
WANG Bing;SUN Youguang;LI Wenliang;SUN Xiuxiu;WANG Weiping(Laizhou Management Station,Shandong Province Water Transfer Project Operation and Maintenance Center,Laizhou 261400,China;Yantai Branch Center,Shandong Province Water Transfer Project Operation and Maintenance Center,Yantai 264000,China;Shandong Water Conservancy Survey and Design Institute Co.,Ltd.,Jinan 250022,China;School of Water Conservancy and Environment,University of Jinan,Jinan 250022,China)
出处
《人民长江》
北大核心
2023年第8期203-210,共8页
Yangtze River
基金
山东省自然科学基金项目“济南市玉符河多水源回灌岩溶水水量水质变化机制研究”(ZR2021ME069)
山东省调水工程运行维护中心科技项目“胶东调水明渠莱州基岩深挖方段渠底及边坡衬砌结构防扬压破坏研究”(W2020063)。
关键词
深挖方渠道
排水减压
减压效果
排水量
胶东调水工程
deep excavated channel
drainage and decompression
decompression effect
drainage volume
Jiaodong water diversion project
