软弱下卧层顶面附加应力影响因素的研究

为揭示下卧层顶面附加应力在不同条件下的主导因素,以条形均布荷载作用下下卧层顶面的最大附加应力的应力系数为依据,应用灰色关联度理论,对软弱下卧层顶面附加应力影响因素进行了关联度分析,得出不同条件下各因素对下卧层顶面附加应力影响规律。结果表明,通过调整主导因素可以更加有效地减小下卧层顶面附加应力,这可为设计确定浅基础埋深方案时参考。

Study on Influencing Factors of Additional Stress on the Top Surface of Soft Substratum

In order to show the leading factor of additional stress on the top of substratum under different conditions,based on the coefficient of the maximum additional stress on the top of substratum under linear uniformed distributed load,the correlation between influencing factors of such additional stress is analyzed in this paper using grey relation theory.The influence rule of additional stress on the top of substratum by each factor under different conditions is obtained.The result shows that adjusting leading factor can more effectively reduce additional stress on the top of substratum,which can be a reference for determination of shallow foundation embedment depth.