深大基坑的支护加固设计与施工

Reinforcement Design and Construction of Deep and Large Foundation Pit Support

由于早期施工质量未能得到控制,造成一深大基坑围护体的钻孔灌注桩存在多处不同程度的缺陷。为确保基坑开挖工程安全,在查明围护体钻孔灌注桩施工缺陷具体情况后,分门别类和有针对性地进行了加固设计和补强,调整并优化基坑工程的施工方案,加强基坑施工过程中的变形监测,以信息化指导施工。实施结果表明,补强设计消除了安全隐患,确保了基坑支护体的安全和基坑工程施工的顺利完成。

Due to lack control over the construction quality in early stage, the cast-in-situ bored piles of one deep-and-large foundation pit support had multiple different degrees of defects. In order to ensure the safety of foundation pit engineering excavation, after identification of the defect details, the classified and targeted reinforcement design and implementation have been carried out, and the construction scheme for foundation pit engineering has also been adjusted and optimized, so as to pay more attentions to deformation monitoring and to guide the construction by informatization. The implementation results show that such reinforcement design can eliminate potential safety hazard and ensure the safety of foundation pit support and the smooth completion of foundation pit engineering construction.