【摘要】 由于改造施工期间柱下基础将临时拆除,需要采取临时支顶措施保证施工期间的结构安全。在该工程中采用了新颖的伞型斜向支撑技术,并利用螺旋式千斤顶进行主动支顶。由于支顶在改造施工的上面一层进行,不但解决了支撑点的问题,而且为改造施工提供了较大的空间,取得了较好的技术经济效果。更多还原

【Abstract】 During structural renovation, the foundation underearth certain columns may have to be removed.So temporary roof-propping measures need to be taken to ensure structural safety. In connection with an engineering example, this paper introduces the application of a novel active roof-propping technique which uses umbrella-shaped braces and screw jacks for active propping. The roof was supported in the adjacent upper floor, which solved the anchor problem and provided sufficient space for renovation construction. This technique is economical.更多还原