摘要
通过运用有关基坑变形的计算方法对上海某大厦钻孔灌注桩基坑工程进行基坑变形的计算,m法计算得基坑最大位移值为6.9mm,基床系数法最大位移值为7.2mm,实际最大位移值为57mm,分析比较发现理论计算值与实际位移值偏差较大。本研究结合工程实际确定土的比例系数和桩的变形系数,在充分考虑影响深基坑变形因素的情况下确定相关的影响因子,对已有的计算方法进行分析和修正,最后得出较为实用和有效的基坑变形计算方法,能在实际工程中对深基坑变形进行及时准确地预测和分析。
The method of caculating the excavation deformation is used to caluclate the excavation deformation of bore pouring piles used in a certain big building in Shanghai.The maximum displacement value of the excavation is 6.9mm by the methool of m,and 7.2mm by the method of foundation coefficient,but the real maximum displacement value is 57mm.Through analysis and comparision,it is found out that the deviation is rather great between the theoretical calculation value and real displacement value.According to the real project,the proportion coefficient of soil and the deformation coefficient of piles ave determined.After fully considering the factors affecting deformation of the deep excavation,some relevant affecting factors are determined.Based on the analysis and modification of the existing calculating method,a rather practical and effective method of calculating the deformation of the excavation is obtained,which can timely and exactly forecast and analyse the deformation of the deep excavation in real projects.
出处
《广西工学院学报》
CAS
2003年第4期25-29,共5页
Journal of Guangxi University of Technology
关键词
灌注桩
深基坑变形
位移
支护体系
deep excavation
deformation of deep excavation
displacement
retaining system
