格形地下连续墙竖向承载特性研究

格形地下连续墙不仅可以用作基坑的围护结构，亦可以作为竖向承重结构。由于目前关于格形地下连续墙竖向承载特性的理论和试验研究非常匮乏，设计中往往采用相当保守的态度。在原位静载试验和三维有限元分析的基础上，对格形地下连续墙的竖向承载机理进行研究，研究结果表明格形地下连续墙的竖向承载机理与灌注桩存在很大差异。基于广泛的参数分析，如土体力学指标、格形地下连续墙的几何尺寸等，提出格形地下连续墙竖向承载力的简化计算公式，可以用于指导格形地下连续墙竖向承载结构的设计和施工。

Vertical bearing behaviors of cellular diaphragm wall

The cellular diaphragm wall is a novel structure,which can be used as the horizontal retaining structure and the vertical bearing structure for deep excavations simultaneously.Rather conservative attitude is often adopted in the design of the cellular diaphragm wall as vertical bearing structure due to the lack of theoretical and experimental researches on the vertical bearing behaviors of cellular diaphragm walls.Based on both the in-situ test evidences and three-dimensional analyses,vertical bearing mechanism of the cellular diaphragm walls is studied.It is found that the vertical bearing mechanism of the cellular diaphragm walls is different from that of the bored piles.By performing parametric studies,the influences of the soil properties and the structural geometrical parameters on the vertical bearing behaviors of the cellular diaphragm walls are investigated.On this basis,a general formula for the calculation of the vertical bearing capacity of the cellular diaphragm walls is proposed.