超深基坑工程支撑拆除中换撑技术综合应用研究

Changing-support Application in Ultra-deep Foundation Excavation Supporting Demolition

深基坑土方开挖施工完成后,在地下结构施工阶段,由于内支撑与竖钢筋、各层永久结构梁底、墙体相交处零星模板、外墙板相交处等产生冲突,故需要内支撑体系进行拆除。文章总结常见换撑拆撑技术方法要点与适用范围,结合实际工程,选取适宜换撑技术在超深基坑工程中进行内支撑拆除,对换撑技术的推广应用提供支持。

In the construction of underground structures,after completed the excavation of ultra-deep foundation excavation,the inner support system needs to be removed for conflicts of the breast support with vertical bars,each layer of permanent structures,sporadic template of walls intersection,and side fascia intersection This paper summarizes common technique and application of support-changing and support demolition,selects proper changing-support technique in ultra-deep foundation for support demolition,and provides technique support for the popularization and application of support-changing.