基坑混凝土支撑的平面稳定性设计计算探讨  

Design and Calculation of Plane Stability of Concrete Support for Foundation Pit

作　　者：胡吉松 Hu Jisong(Guangdong Guanji Geotechnical Engineering Co.,Ltd.,Guangzhou 510640,Guangdong,China)

机构地区：[1]广东冠技岩土工程有限公司,广东广州510640

出　　处：《岩土工程技术》2024年第3期279-286,共8页Geotechnical Engineering Technique

摘　　要：基坑相关规范对基坑支撑平面内的计算长度系数规定不详,通常对支撑平面内计算长度系数取为1.0。通过对基坑混凝土支撑的平面稳定性进行分析,认为按框架布置的支撑平面内稳定性不容忽视,且为支撑承载力的主控要素,平面内的计算长度系数大于1。根据稳定屈曲理论,提出了一种简单适用的长度计算系数公式,并提出提高支撑稳定性的关键措施。Regulations concerning foundation pits often lack specific provisions regarding the calculation length factor within the plane of pit supports,commonly assuming a value of 1.0.Through an analysis of the planar stability of foundation pit concrete supports it is evident that the stability within the support plane,arranged as a framework,cannot be overlooked and constitutes a primary controlling factor for support-bearing capacity,implying a calculation length factor greater than 1.Drawing from the theory of stable buckling,a simple and applicable length calculation coefficient formula is proposed,along with key measures to improve support stability.

关 键 词：基坑 混凝土支撑 平面内稳定 长度系数 

分 类 号：TU473[建筑科学—结构工程]