纳米比亚硅藻土的工程特性  

Engineering properties of diatomaceous in Namibia

作　　者：马秋柱[1] 何智敏[1] 蔡泽明[1] 

机构地区：[1]中交第四航务工程勘察设计院有限公司,广东广州510230

出　　处：《水运工程》2017年第12期80-84,共5页Port & Waterway Engineering

摘　　要：在实施纳米比亚某项目的勘察过程中,遇到了一种特殊土——硅藻土。通过X射线衍射试验和热场发射电镜扫描进一步确定了硅藻土的成分组成和微观结构。针对硅藻土的特殊工程性质,现场采取土样进行大量细致的室内土工试验分析,并运用多种原位试验手段,测试硅藻土的原位力学强度。测试结果表明硅藻土的含水量非常高、密度极低、孔隙比大,通过对比发现硅藻土的室内试验剪切强度与通过原位试验获得的原位剪切强度较为一致;但与抗剪强度相比,其抗压强度明显高于抗剪强度。One type of special soil called diatomaceous was encountered during the execution of site investigation in Namibia. Its composition and microstructure was obtained by X-ray diffraction and thermal field emission scanning Its.Detailed laboratory analysis tests and various in-situ tests were carried out to gain the shear strength aiming at the special engineering properties of diatomaceous. The results show that the water content of diatomaceous is very high, the density is very low and the porosity is large. It is found that the shear strength of diatomaceous obtained by laboratory tests is consistent with that in-situ test.But compared with the shear strength,its compressibility is significantly higher appears not match with its shear strength.

关 键 词：硅藻土 剪切强度 原位测试 高压缩性 

分 类 号：U656.1[交通运输工程—港口、海岸及近海工程] TU431[交通运输工程—船舶与海洋工程]