工程地质学报2016，Vol.24Issue(5)：1016-1021,6.DOI:10.13544/j.cnki.jeg.2016.05.033
基于位移控制的装配式预应力鱼腹梁深基坑应用研究
INNOVATIVE PRE-STRESSED AND PREFABRICATED SUPPORT FOR RETAINING STRUCTURE OF DEEP FOUNDATON PIT WITH DISPLACEMENT CONTROL
摘要
Abstract
Based on the measured data of the foundation pit,the work mechanism and environmental effect of innovative pre-stressed and prefabricated support(IPS)for retaining structures are studied in three aspects.They include pre-stress control,deformation control and stiffness control.Results show that:Compared with the traditional support,the passive soil pressure is fully motivated by the pre-stress that applied to the retaining structure using IPS before excavation.And the measured data shows that the overall deep displacement of the retaining structure is less than 1 0mm.At the same time,the IPS is applied to limit the deformation of foundation pit by applying pre-stress to improve the apparent stiffness.Measured surface subsidence is not more than 1 8mm which show it reduces the impact of excavation on the environment effectively.In addition,aimed at the stress concentration defect of traditional internal support,the IPS overcomes it through the support system full span reaction.The IPS indicates wide application in deep excavation engineering.关键词
预应力鱼腹梁/深基坑/环境影响/位移控制/刚度控制Key words
Innovative Pre-Stressed Support(IPS)/Deep foundation/Environmental effect/Deformation control/Stiffness control分类
建筑与水利引用本文复制引用
郭亮,胡卸文,钱德良,巫锡勇..基于位移控制的装配式预应力鱼腹梁深基坑应用研究[J].工程地质学报,2016,24(5):1016-1021,6.基金项目
国家自然科学基金项目（41602290）资助． （）
