珠海地区软土微观结构类型及定量分析研究

随着我国沿海地区的高速发展,大型地下及地上建筑不断涌现,这些建筑大都坐落于分布广泛的海积软土之上,而与此有关的软土工程问题愈来愈突出。软土的工程性质很大程度上取决于微结构的变化。本文通过对珠海地区具有代表性的软土微观结构进行分析和研究,获取珠海地区软土的微结构类型和特点;对不同固结压力条件下试样的SEM图像进行定量分析,揭示了土体发生变形的宏观机制及土体在受力过程中具有逐渐破损的变形规律,以指导工程实践。

Microstructure classification and quantitative study on soft clay in Zhuhai

With the high-speed developing of coastal region,there are more and more largescale geotechnical structures,all of which are almost located in marine deposited clay.Then the geomechanical problems over marine deposited clay have caught more attention.Macro-behaviors of soft clay is dependent on microstructure characteristics.It is analyzed and investigated for their microstructure of the representative soft clay in Zhuhai,and the aim is to give the classification and characters of microstructure of soft clay in Zhuhai.Then SEM tests were dealt with on Zhuhai in different stresses during one dimensional consolidation test,moreover the evolution of pore(including total pore area,total pore numbers,mean diameter and fractal dimension) was quantitatively analyzed based on the horizontal cut plane of the specimen.We can point out that the clay has the characters of damage gradually and give a good reference for design and construction of engineering in Zhuhai area.