(中国建筑西北设计研究院，西安710003) 

［提要］西安钟鼓楼广场及地下工程是西安市重点工程。为了降低结构高度及减小开挖深度，工程采用了无梁楼盖体系。采取措施避免降水对古建筑钟鼓楼的影响。对超长结构采取了较为合理的结构措施，降低了温度效应的影响。对工程的重点部位的详细设计进行了探讨。可供类似工程参考。

［关键词］无梁楼盖；超长结构；平战结合；护坡桩

Construction and Underground Structure Design of Xi"an Bell and Drum Tower Square /Zhu Wei(China Northwest Building Design Research Institute, Xi"an 710003, China)

Abstract:The construction and underground structure design of bell and drum tower square are introduced.The beamless roof structure is adopted  to reduce the structural height and depth of pit.Some measures are used to avoid the influence of fall water height on settlement of ball and drum tower.The suitable structural measures are utitized for the super long structure to reduce the influence of degree effect.Some detail designs are presented.

Keywords:beamless roof structure; ultra leng stracture; union of peacetime and wartime; slope protected pile