某工程基础底板取消部分后浇带的施工技术

基础底板施工中后浇带的留置有利于解决超长结构温度应力及高低层差异沉降应力导致底板裂缝，但影响结构安全及防水质量。实际施工中，后浇带回填质量很难保证，因此，尽量减少后浇带的留置对结构是有利的。介绍了通过采用微膨胀混凝土作为有条件技术补偿，取消超长结构温度应力为主控的后浇带的施工尝试。

CONSTRUCTION TECHNIQUE OF CANCELING A PART OF AFTER-POURING ZONE IN FOUNDATION SLAB OF A PROJECT

The after-pouringzone in foundation slab is be neficial to prevent super-long structure from cracks causedby stress due to te mperature difference and high-low story settlement,which will effectthe safety and waterproofing of the structure.Nevertheless,it is very hard to ensurebackfilling quality in after-pouring zone during the period of construction.So,minimizingthe amount of after-pouring zone will do good to structure.In this paper, it is discussedto use microexpansion concrete as technical compensation with condition in order to cancelthe after-pouring zone in super-long structure,in which temperature stress is the primefactor.