人工冻结法在南京地铁张府园车站的应用

Application of artificial freezing method in Zhang Fuyuan station of Nanjing subway's

南京地铁一期工程张府园车站南隧道盾构法施工时,洞门两侧出现大量流砂,附近区域的沉降量较大,为了确保地下管线和地面交通的正常使用和安全运行,在南京首次实施了地下工程的人工冻结法施工。本文论述了冻结法在该工程中的冻结设计、施工工艺及对周围环境影响等问题和实际取得的效果。

During the constructions of the shield method in Zhang Fuyuan stations south tunnel ,which is the primary engineering of Nanjing subway, raff running sand appeared on both sides of the hole, and the sedimentation was relatively larger in the vicinity. To insure the sub-lead-outs normal usages and safety ground traffic, the artificial freezing method of underground engineering was firstly put in practice in Nanjing. The problems of the freezing method in this engineering were discussed in this article, such as freezing designs, constructing technics and the effect on envirenment around and so on. The practical impact was also dissertated.