摘要
软土地基中为控制临近浅基础建筑物的单层地下室基坑变形,开发了新型的基坑支护结构和控制技术,并应用于工程中。在基坑内设置被动桩,被动桩与支护桩设置传力梁,将内支撑设置于支护结构顶部并在浇筑地下室顶板时不拆除支撑,详细介绍了该技术的施工方法。在施工过程中进行了土体水平位移、坑外土体竖向位移及周边房屋沉降等监测。结果表明,随着施工开挖,深层土体水平位移曲线呈现“鱼肚”形,且基坑在开挖过程中土体位移变化不大,深层土体水平位移、坑外土体竖向位移及周边房屋沉降均未超出报警值。通过新型支护结构和控制技术的应用,有效控制了临近浅基础基坑变形。
In order to control the deformation of single floor basement pit near the shallow foundation building in soft ground,a new foundation pit supporting structure and control technology are developed and applied in the project.The passive pile is set in the foundation pit,and the transfer beam is set between the passive pile and the supporting pile.The monitoring of the horizontal displacement of the soil,the vertical displacement of the pit outside and the settlement of surrounding houses are carried out.The results show that with the excavation,the horizontal displacement curve of the deep soil body shows a"fish belly"shape,and the displacement of the soil in the excavation process and the demolition process is not much.The horizontal displacements of the deep soil,the vertical displacements of the pit and the settlements of the surrounding houses did not exceed the warning value.The deformation of the pit adjacent shallow foundation is effectively controlled by the application of the new supporting structure and control technology.
作者
袁子琦
崔允亮
Yuan Ziqi;Cui Yunliang(China Power Construction Group East China Survey Design&Research Institute Co.,Ltd.,Hangzhou 311122,Zhejiang,China;Engineering College,Zhejiang University City College,Hangzhou 310015,Zhejiang,China)
出处
《岩土工程技术》
2020年第6期334-338,共5页
Geotechnical Engineering Technique
基金
中国电建集团华东勘测设计研究院科研计划项目(KY2018-JG-39)。
关键词
单层地下室基坑
浅基础
变形控制
被动桩
single floor basement pit
shallow foundation
deformation control
passive pile
