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某厂薄板车间,由于地下水位的升高,引起地下构筑物的大量漏水,影响车间的投产。为经常降低地下水位起见,最后采用了设置降水井的方案。井深11米,井内径2米;-3米以上壁厚300毫米,-3米以下外壁按2%放坡,井底用混凝土封住,井壁事先作成圆孔加钢丝网的进水孔,井外壁有150毫米厚的渗水砂层(图1)。
In a thin sheet workshop of a factory, due to the increase of groundwater level, a large amount of leakage of underground structures was caused and the production of the workshop was affected. In order to reduce the groundwater level frequently, a solution for setting up a well was finally adopted. Well depth 11 meters, well diameter 2 meters; -3 meters above the wall thickness of 300 mm, -2 meters below the outer wall by 2% grading, the bottom hole with a concrete seal, well wall in advance made into a hole with steel wire inlet hole, The outer wall of the well has a 150 mm thick layer of water seepage (Figure 1).