地下水发育深路堑涌水量预测

Deep Cutting Water Inflow Prediction of Development of Groundwater

西宁站改和相关工程货车外绕线局部地段为路堑工程,路堑开挖最大宽度为53 m,开挖深度9～12m,主要开挖地层为第四系全新统的砂质黄土及细圆砾土,属于富水地层。在地质调查的基础上,进行专门的水文地质勘察工作,查明该段路堑的地层、含水层的性质、水位、埋藏深度、厚度及分布等特征,依据试验参数及路堑开挖情况对时涌水量进行预测,为工程设计提供依据。提出设置U型封闭槽及钻孔注浆、旋喷桩止水等综合工程措施建议,以减少工程实施对周边生态环境及既有建筑物的影响。

The Xining station reformation and other related construction engineering of freight car partial lines are cutting projects, the maximum width of cutting excavation is about 53 m, and the excavation depth is from 9m to 12 m. The main ex- cavation strata is the fourth Holocene sandy loess and cobbles, which belongs to the rich - water strata. Therefore on the basis of the geological survey, the special hydrogeology survey is conducted and finds out the strata of the cutting, the nature of the aquifer, the water level, the buried depth, the thickness, the distribution and the other characteristics. Based on test parame- ters and cutting excavation, the water inflow is predicted, which provide the basis for the engineering design. The paper puts forward the comprehensive engineering suggestions of setting U - shape closed slot and drilling grouting, as well as selecting the jet grouting pile and water stop, so as to minimize the impact of project implementation on the surrounding ecological envi- ronment and the adjacent buildings.