由上海铁路局兴建的铁联大厦是一座高层建筑，由于地理环境和地质环境较为特殊，基坑工程的施工比一般工程困难。本文结合基础工程的设计与施工实践，介绍了在不同环境条件下采用不同围扩形式的办法.并利用防止地基土液化的压密注浆加固坑内被动土压力等措施，取得安全、经济效果的经验。

The Tie-Lian Mansion which was built by the Shanghak Railway Administration is a high multi-storey building. Due to the particular geographic and geologic circumstances，the construction work of its foundation was much difficult. Combined with the practices on design and construction of this project，the following experiences are introduced in this paper:(1)Under different environment conditions，different mode of surrounding support structures were applied，(2)By utilizing compression-consolidation grouting measure，the passive soil pressure in foundation pit was strengthened to prevent the liquefaction of the ground，etc. Safety and economy effects have been obtained through thest practices.