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摘要：北京张坊水源应急供水工程在施工水井时, 发生涌砂埋井事件。涌砂主要是地层破碎带中含有细砂引起, 确定了破碎带的位置。采用挂管的施工工艺对涌砂部位进行了治理, 在未减少水井出水量的条件下, 实现水清砂净目标。

 

关健词：水井涌砂 挂管工艺 水清砂净

 

1 工程概况

 

作为北京市一项应急供水工程, 张坊水源应急供水工程的水源为双水源, 即拒马河水和岩溶地下水。为实现岩溶地下水的开发, 在张坊地区实施了勘探工程, 其中下寺村施工了眼探采结合并, 井深400