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出于降低高速公路坡度的目的,团结桥连接线高速公路路基开挖在Ⅱ级阶地前缘处排水盲沟最大开挖段基本将原来连续的天然含水层切穿,导致地下水排泄基准面下降,使得地下水流场发生改变,部分民井出现水位下降或干涸现象.得出路基开挖排水是导致工程区附近地下水含水层结构及流场改变、水位下降或局部疏干的主要原因.
For the purpose of reducing the grade of the expressway, the excavation section of the ditch of the drainage blind ditch at the front edge of the grade Ⅱ terrace of the TZJJJX basically cuts through the original continuous natural aquifer, resulting in the lowering of the groundwater drainage datum, Which leads to the change of groundwater flow field and the drop or dryout of some wells.The conclusion is drawn that the drainage and drainage of roadbed is the main reason leading to the change of groundwater aquifer structure and flow field, water level drop or local dredging near the project area.