北京地铁过含水砂层施工对策

Countermeasures for Tunnel/shaft Construction in Water-bearing Sand Layers: Case Study on Beijing Metro

结合北京地铁五号线磁器口至崇文门区间隧道及崇文门东站的工程实际,比较详细地论述了该区间隧道临时施工竖井和施工横通道、崇文门车站东南风井及风道过含水砂层时所采用的施工方案,介绍了防止涌水涌砂、避免产生过大降沉的方法,以及结合具体地质情况所采取的降水措施。

On basis of the construction of Ciqikou - Chongwenmen running tunnel and Chongwenmen station of Beijing Metro, the article presents the schemes of the constructions in water-bearing sand layers for the intermediate temporary shaft and cross tunnel of the running tunnel and the south-east ventilation shaft and ventilation tunnel of Chongwenmen station. The article also presents the countermeasures for the prevention of water/sand inflow so as to avoid serious subsidenee. The article emphasizes on the different dewatering measures taken according to different geological conditions.