摘   要： 超高层大型建筑目前已经成为城市建设中重要的组成部分。基于超高建筑竖向荷载较大的特点，其基础形式多采用超长超大厚度的筏形基础。而筏板基础往往因为建筑长度较长，依据相关规范要求设置多道后浇带，由此产生了大厚度、小净空、变截面的后浇带施工难题。结合成都某工程地下室筏形基础工程所采用的混凝土膨胀加强带施工技术，介绍了超厚超长大体积混凝土一次浇筑无缝施工技术，在实践中对传统后浇带的优化替代方案进行了探索。

Abstract: Currently super high-rise large buildings have become the important components in city construction. Based on the characteristic of large erect load for super high-rise buildings, raft foundation with super-long and super-large thickness is adopted to its foundation form. Because of longer building length for raft foundation, according to relevant specification, multi-channel late poured bands should be set, therefore, construction difficulties about large thickness, small clearance and variable cross-section of late poured bands are appeared. Combining with a raft foundation of basement in one Chengdu project, with the construction technique for concrete expansion reinforcing band, jointless construction for one-time-concreting to super-thick and super-long mass concrete is achieved. And optimal substitutive proposals of traditional late poured bands are explored and practiced.