许朝阳　（扬州大学水利与建筑工程学院　225009） 

吕国兵　（扬州建筑工程公司  225001）

[提要]  扬州市古城区由于地质条件复杂，在时代广场工程深基坑施工过程中，出现支护位移过大、坑底冒水现象，危及周围建筑物的安全。该基坑施工时采取了临时加固，其设计、施工方法涉及到周围构、建筑物等非常见问题的处理。针对这些方法和问题作了较深入的分析与探讨。
[关键词]  古城区  复杂地基  支护  管涌  基坑加固

Due to complicate geological condition of ancient city, the displacement of supporting systems and piping was very large,which endangered the safety of the buildings nearby. Remedial measures are introduced, including strengthening of soil foundation,design and construction of temporary supporting systems and its further exploration.
Keywords: ancient city; complicate foundation; supporting systems; piping; strengthening; foundation pit