城市地下工程与高层建筑深基坑岩石间壁处理研究

REASERCH ON PROCESSING TO ROCK WALL BETWEEN CITY UNDERGROUND OPENING AND DEEP FOUNDATION PIT OF HIGHRISES

介绍重庆世贸中心深基坑和临梯干道支洞人防工程的岩石间壁处理方法。基坑侧壁与防空洞侧壁的最小距离（岩壁厚度）仅２．０ｍ左右，按有关部门的要求，间壁最小距离为１２～２０ｍ，按此要求势必造成世贸中心减少二层地下楼层。为此，我们提出了确定岩石间壁最小距离的合理方法，确定该工程间壁最小距离为４ｍ，并采取一些结构措施以确保安全。对岩石间壁的应力及洞拱拉杆的轴力进行了量测，量测结果与计算吻合，表明本项工程的间壁处理方法合理，并可供同类工程参考。

The processing method on rock wall between foundation pit of Chongqing World Trade Center and the branch opening of main line of Linti tunnel is introduced. The smallest thickness of rock wall is 2.0 m, but the required thickness is 12.0～20.0 m. So the highrise will be decreased two floors of celler. For that a rational method to determine the smallest thickness of rock wall is put forward. So the smallest thickness is determired to be 4.0 m, and some safety measures are adopted correspondingly. In addition the stress in rock wall and axial force in tie bar of arch measured in opening indicates that the measured results are in keeping with the calculating results. So the processing method on rock wall is rational and can be used as a reference for other identical project.