高地下水渠段增设排水系统在南水北调中线工程中的应用

Application of Adding Drainage System to Canal with High Groundwater Level in the South-to-North Water Diversion Project

南水北调中线工程自2014年通水运行以来,发挥了极大的综合效益。由于工程沿线部分渠段地下水位较高,特别是雨后水位升高明显,造成输水多处衬砌板隆起破坏。因此,确保高地下水及时排出是保障渠道衬砌板安全运行的关键。文章选取中线工程南阳段右岸桩号105+360~106+060为试验段,通过对高地下水渠段增设排水系统施工方案设计介绍,指导工程施工。实践证明,增设排水系统后高地下水位排水效果显著,可为类似水利工程排水系统施工提供借鉴。

The middle route of the South-to-North Water Diversion Project has generated great comprehensive benefits since it was put into operation in 2014.Due to the high groundwater level of some canal sections along the project,especially the obvious rise of water level after rain,many lining slabs of water diversion have been damaged.Therefore,the key to ensure the safe operation of the lining slab is to ensure the timely discharge of high groundwater.In this paper,the pile No.105+360~106+060 on the right bank of Nanyang section of the middle route project is selected as the test section.Through introducing the construction scheme design of adding drainage system to the canal section with high groundwater level,the construction of the project is guided.The practice proves that the drainage effect of high groundwater level is remarkable after adding drainage system,which can provide reference for the drainage system construction of similar water conservancy projects.