建筑地基沉降预测的Usher-Spillman组合模型研究  

Usher-Spillman Model in the Forecast of Architecture Groundsill Settlement

作　　者：蒋建平[1] 路倬[1] 高广运[2] 顾宝和[3] 

机构地区：[1]上海海事大学海洋环境与工程学院,上海201036 [2]同济大学土木工程学院,上海200092 [3]建设部综合勘察研究设计院,北京100007

出　　处：《北京工业大学学报》2011年第4期507-514,共8页Journal of Beijing University of Technology

基　　金：国家自然科学基金资助项目(50678128);上海海事大学科研基金资助项目(2009160);上海市教委科研创新项目(09YZ250);港口;海岸及近海工程校重点学科项目(A2010030);上海市第四期本科教育高地建设项目(B210008G)

摘　　要：从40处现场地基沉降实测资料中选取有代表性的17处资料,对建筑地基沉降-时间曲线进行了优化的拟合分析.针对建筑地基的沉降特性,提出了Usher-Spillman组合数学模型.对17处实测资料的拟合表明,Usher-Spillman组合模型对台阶型、L型、S型、凹型、微凹型、直线型曲线都有高的拟合精度,相关系数R为0.997 68～1,平均为0.999 24;该模型拟合效果比双曲线模型、Usher曲线模型、Spillman曲线模型的都要好;基于该组合数学模型的建筑地基沉降的计算值与实测值的误差一般为±0.969 18%.结果表明,本文提出的Usher-Spillman组合数学模型适应性强,它对建筑地基沉降-时间曲线的拟合是较为可靠的,利用这些拟合方程式能对建筑地基沉降进行预测.Based on the actual measurement data of 17 field testing architecture groundsill sites,optimization fitting analysis of groundsill settlement versus time curves is carried out.Based on the settlement characteristics of the architecture groundsill,an Usher-Spillman combined mathematical model is put forward.The fitting results of the 17 field measurement data by using the model show that the fitting precision is high,the correlativity coefficient R is in the range of 0.997 68~1,and the average value is 0.999 24.The fitting effect of the model is better than that of the hyperbolic model,the Usher model and Spillman model.Results show that the Usher-Spillman combined mathematical model has a good adaptability and it is accurate and credible for the fitting of groundsill settlement versus time curves.The corresponding fitting equations can be used to forecast the settlement of the architecture groundsill.

关 键 词：数学模型 沉降 地基 实测资料 

分 类 号：TU753[建筑科学—建筑技术科学]