多层复合地基沉降计算

SETTLEMENT CALCULATION OF MULTI-LAYERS AND COMPOSITE FOUNDATION

多层复合地基沉降量计算,对复合地基压缩模量的处理是关键问题。分析了先水平后垂直、先垂直后水平、《建筑地基处理设计规范》等方法的计算原理、计算方法的优缺点。理论和算例分析表明,先水平后垂直、先垂直后水平两种方法计算地基沉降量是等效的。先垂直后水平将地基简化为单一均质体,计算简单方便,建议采用第二种方法计算地基沉降量。

The settlement calculation of multi - layers and composite foundation is a key problem for dealing - properly with compression modulus of composite foundation. The merit and demerit of calculation methods are analyzed in this paper, which the methods includes vertical calculation after horizontal calculation, horizontal - calculation after vertical calculation and design specifications of construction foundation treatment. The theoreti- cal and examples show that the computed total settlement by vertical calculation after horizontal calculation is e- quivalent to that of horizontal calculation after vertical calculation. The method of horizontal calculation after vertical calculation simplifies the foundation as single homogeneous body and calculation easily. The paper advi- ses that computing the computed total settlement takes the method of horizontal calculation after vertical calculation.