摘要
在超深基坑施工过程中,边坡稳定与边坡支护紧密相连,针对性地采用适合工程特点的支护技术不仅可以保证边坡的安全,而且在很大程度上还可以节省土方的开挖成本。该工程中就是采用了土钉墙+内支撑两种组合支护方案,地下水位以上部分采用土钉墙,地下水位以下部分采用环形内支撑,即由三轴搅拌桩、高压旋喷桩、钢筋混凝土灌注桩、格构柱与钢筋混凝土支撑构件组成支撑体系,结构层施工时,又利用了先进的换撑技术,不仅传力合理,而且基坑位移变形较小,为工程的顺利实施创造了良好的条件。
In the process of super deep pit construction, stability of the side slope connects with side slope support structure, according to the engineering characteristics adopting side slope of support technique not only can guarantee the safety of the side slope, but also save earth work operations cost. In the project be adopted to two kinds of combinations scheme of soil-nail wall ＋ inner support, adopting soil-nail wall above part of ground water table, and did inner support below the ground water table, which including three axes agitating pile,high pressure jet grouting pile, reinforced concrete pile,latticed column and reinforced concrete member compose support system, once constructing structure floor, we can adopt advanced technique of support replacement, not only deliver power is reasonable, but also displacement of foundation pit transform is smaller,which creates a good condition for the smooth implement of the project.
出处
《四川建筑科学研究》
2012年第5期104-108,共5页
Sichuan Building Science
基金
河南省教育厅自然科学研究项目(2011B630021)
关键词
深基坑支护
土钉墙
内支撑
换撑技术
support structure for deep foundation pit
soil-nail wall
inner support
support replacement techniqu
