摘要
针对基础沉降量较大的情况下,采用国内4种现行规范进行沉降计算,以便分析压缩土层计算深度对沉降量的影响.计算研究表明,基于Boussinesq解求解地基附加应力,对于苏通长江公路大桥主桥南塔超长大直径群桩基础理论沉降计算,若采用0.01的变形比来确定压缩土层计算深度,则按照4种规范求得计算深度基本相等,所得理论沉降值再乘各相应的修正系数,得到最终沉降值非常接近离心试验沉降值,偏差在-8.3%^+4.7%.因此,当理论沉降量较大时,采用0.025的变形比来确定压缩土层计算深度不合适.
In order to analyze large settlement of foundation under the influence of calculating deep of compressed soil layers,four codes that have being used in China have been applied to calculating the settlement of extra-long large diameter pile groups under south tower of main bridge of Sutong Yangtse River Highway Bridges.The results show that,calculating deep of compressed soil layers are nearly equal through deciding by four codes if ratio of deformation is 0.01,and the final settlements that are equal to the...
出处
《湖北工业大学学报》
2009年第1期97-100,共4页
Journal of Hubei University of Technology
基金
江苏省交通厅科研项目(04Y029)
关键词
规范
沉降
压缩土层
计算深度
变形比
codes
settlement
compressed soil layers
calculating deep
ratio of deformation
