沪昆高铁娄底南站底板水害防治研究

Study on prevention and treatment of water damage on the basement floor of Loudi South Station of Shanghai-Kunming High-Speed Railway

随着基坑工程开挖深度的不断增加,底板水害治理问题日益突出。依托沪昆高铁娄底南站枢纽一体化岩土工程勘察项目,开展了专项水文地质勘察与放水实验研究;结合水害特征,研发了一套放水实验装置及配套使用设施。采用放水实验对水文地质参数进行求解,并通过MATLAB实现程序化建模,研究了高铁枢纽站地下水位高程下降至目标水位高程所布设的降水孔数及降水量的关系。结果表明:治理工程完成后,娄底南站地下室底板30处明显裂缝出水区已不再涌水,治理效果显著。相关分析方法可供类似工程参考。

With the increasing of excavation depth,the problem of water damage in basement floor is becoming more and more prominent.Based on the geotechnical investigation project of Loudi South Station of Shanghai-Kunming High-Speed Railway,special hydrogeological investigation and water release experiment were carried out.Combined with the characteristics of water damage,a set of water discharge experimental equipment and supporting facilities were developed.The water discharge experiment is used to solve the geological parameters,and the numerical modeling is realized by the program MATLAB.The relationship between the number of precipitation holes and precipitation is studied when the groundwater level of high-speed railway hub station drops to the target water level.The results show that the water gushing is no longer in the 30 obvious cracks in the basement floor of Loudi South Station after the treatment,and the treatment effect is remarkable.The correlation analysis method can be referred for similar projects.