摘要
结合甘肃庆阳某超高层综合体项目,以其桩筏基础沉降监测数据为依据,采用三点法、修正双曲线法、泊松曲线法及蠕变沉降实用算法分别对深厚黄土上超高层建筑进行沉降预测,并与现场实测数据进行对比分析。研究表明:修正双曲线法和蠕变沉降实用算法适用于大厚度黄土区超高层建筑的沉降预测,且后者在已知有限数据情况下能更好地预测其沉降变形;验证了蠕变沉降实用算法有效预测的合理性,在蠕变实用算法对超高层建筑展开沉降预测的基础之上,得出了根据已有实测数据时段计算误差在0.4 mm以内的修正双曲线法有效预测范围算式。
Combined with a super high-rise complex project in Qingyang,Gansu,based on the monitoring data of piled-raft foundation settlement,the three-point method,modified hyperbolic method,Poisson curve method and creep settlement practical algorithm were used to predict the settlement of deep and thick loess foundation.The settlement of high-rise buildings on deep and thick loess foundation was predicted and compared with the measured data on a building site.The research showed that the modified hyperbolic method and the creep settlement practical algorithm were suitable for settlement prediction of super high-rise buildings on deep and thick loess foundation,and the latter could better predict settlement by existing limited measured data;the rationality of effective predict for the creep practical algorithm was verified and based on the settlement prediction about super high-rise buildings by the creep practical algorithm,the effective prediction range by the modified hyperbolic method was obtained according to existing measured data and allowable errors controlled less than 4 mm.
作者
周茗如
郭启明
肖永站
ZHOU Mingru;GUO Qiming;XIAO Yongzhan(Northwest Center for Disaster Mitigation in Civil Engineering of Ministry of Education,Lanzhou 730050,China;School of Civil Engineering,Lanzhou University of Technology,Lanzhou 730050,China)
出处
《工业建筑》
CSCD
北大核心
2020年第8期72-79,共8页
Industrial Construction
基金
国家自然科学基金项目(51468039)。
关键词
深厚黄土区
超高层建筑
修正双曲线法
蠕变沉降实用算法
沉降预测
deep and thick loess area
super high-rise building
modified hyperbolic method
creep settlement practical algorithm
settlement prediction
