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引言在分析了深埋箱形基础地基变形的基础上,进一步探讨基底接触压力分布规律是很有必要的。外科大楼箱基底面接触压力分布图形设计时原按图15(a)考虑,在参考了其他工程基底土反力实测资料以后,图形按图15(b)修改。根据两种图形计算最大弯矩,后者仅为前者的45％,配筋量相差达一倍以上。目前国内不少高层建筑箱基测试结果表明,按常用的、建立在弹性理论基础上的刚性板上反力系数求算箱基整体弯矩比按实测反力的计算结果往往大三倍左右,可见日前常用的计算刚性基础底面上反力分布方法很值得进一步研究。
Introduction Based on the analysis of the deformation of deep-buried box-foundation foundation, it is necessary to further explore the basic law of contact pressure distribution. The design of the contact pressure distribution of the basement surface of the surgical building box was originally considered as shown in Figure 15(a). After referring to the measured data of the other works, the figure was modified as shown in Figure 15(b). Calculate the maximum bending moment based on the two figures. The latter is only 45% of the former and the amount of reinforcement is more than double. At present, many domestic high-rise building box foundation test results show that, based on the commonly used rigid plate counterforce coefficients based on the elastic theory, the total bending moment ratio of the box foundation is usually about three times larger than the measured reaction force. It can be seen that the method of distribution of reaction force on the bottom surface of the commonly used calculation rigid foundation is worth further study.