层状地基中单桩非线性分析方法与应用

Nonlinear settlement analysis of a single pile in layered soils

在沿海地区,随着高层建筑工程的不断建设,地质条件的日趋复杂,桩基础建筑物的沉降计算分析越来越重要。由于桩基础是一个十分复杂的系统,影响桩基础受力变形特性的因素很多,因而分析桩基础的受力及变形特性相当困难。迄今为止,还没有令人满意的分析方法,不少简化分析方法是基于均质各向同性弹性假设的,无法真实地描述层状地基中单桩的荷载沉降关系,本文应用层状地基中的非线性分析方法,结合福州地区的地质条件,对工程PHC管桩试桩实测荷载-沉降曲线进行了讨论,进一步探讨了层状地基中非线性简化分析方法在软土条件下单桩沉降分析中的适应性。

In China＇s coastal areas, with the construction of the high-- rise buildings and the complication of the geological condi- tions, the prediction of the settlements of pile--supported foundation becomes more and more important. Due to the complication of the structures as a whole, it＇s difficult to make accurate analysis using the existing analysis methods. Till now, there has no a com- pleted design theory or a simplified analysis. This text combined with the geological conditions of Fuzhou, the discussion of the application of nonlinear analysis method in the soft soil was carried out based on the data of the load--settlement curve of test pile.