深圳机场残积土的微观试验研究

Experimental Study on Mineral Composition and Microstructure of the Residual Soils in Shehzhen Airport

本文采用物化分析，Ｘ射线衍射分析，扫描电镜，压汞测孔法及偏光显微镜等手段，分析了深圳机场场基残积土的物质成分和微结构特征，从微观角度阐述了该残积土工程特性（如：高强度，中偏高压缩性，不均匀性等等）的本质原因，并和深圳花岗岩残积土进行了对比分析。

In this paper, the characteristic of mineral composition and microstructure of the residual soils in Shehzhen airport are investigated by means of physico-chemical analysis, X-ray diffraction, scanning electron microscope , mercury intrusion prorosimetry and polarizing microscope, etc. The peculiar behaviours (e. g. high strength, rather high compressibility and non-homogeneity, etc.) of the residual soils are explained with microscopic viewpoint. Comparisons are made between the properties of the residual soils in the airport and those of granitic residual soils in Shenzhen.