加筋地基竖向位移分析

运用在半无限体内某一深度作用一水平集中力,体内任一点的竖向位移公式(Mindlin解),推导出加筋地基基础中心及端部的竖向位移公式,讨论加筋长度、加筋深度对加筋地基沉降的影响。计算结果表明加筋对基础端部沉降的减小效应较中心明显,加筋长度在一定范围时,加筋减小沉降的效果最好。建议第一层加筋深度不大于0.25b(b为基础宽度),以下各层加筋深度不大于1.0b,加筋长度取1.0~2.0b。给出的加筋参数与地基沉降的关系图表可为加筋工程的设计施工提供参考。

SOLUTION OF THE VERTICAL DISPLACEMENT OF REINFORCED FOUNDATION

Mindlins solution for surface displacement due to a horizontal point load at a depth is integrated to calculate the vertical displacement of reinforced foundation. The effects on settlement of length and depth of reinforcement are investigated. It is shown that more pronounced settlement reductions result at the edges of foundation and the best reduction effect is achieved when the reinforcement has a length of 1.0 to 2.0 times the width of foundation. It is suggested that the first layer be located at a depth less than 0.25 times the width of foundation and the rest at a depth less than 1.0 times the width of the foundation. The results are believed to be useful in estimating settlement reductions of foundation due to reinforcement.