海南某机场桩网复合地基沉降特性研究

Study of Settling Property on the Composite Pile-net Foundations of an Airport in Hainan Province

以海南某机场桩网复合地基为例,在分析桩网复合地基作用机理的基础上,对其沉降规律进行研究,得出以下结论:桩网复合地基对总沉降量的控制能力较好,最大沉降量为176mm,远小于采用其他软土地基处理方法(如排水固结法)的沉降量;其沉降曲线符合一般地基的沉降规律;某位置的总沉降量与在桩网复合地基中的位置和软土分布区的位置有一定关系。用复合模量法对刚性桩网复合地基沉降量的计算结果相比实测偏大。

Based on the analysis of the mechanism of composite foundation,an airport in Hainan Province was considered to find out the settlement law of the composite foundation.The results were as follows：The control ability of the composite foundation with piles was good.The max settlement of the composite foundation was during 145~176mm and was lower than the settlement that other methods were used（e.g.drainage consolidation method）.And the settlement curve of Hainan airport was in accordance with the settlement law of common foundation.The total settlement of a certain position was related to its position of the composite foundation and position of the soft soil.The results of composite modulus method for calculating the settlement of composite foundation with rigid piles were relatively large compared with the experimental results.