纳米比亚硅藻土的工程特性
发布时间：2019-07-04 09:11
【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。
[Abstract]:In the course of carrying out a project in Namibia, a special kind of soil, diatomite, was encountered. The composition and microstructure of diatomite were further determined by X-ray diffraction test and thermal field emission electron microscope scanning. In view of the special engineering properties of diatomite, a large number of detailed laboratory geotechnical tests and analysis were carried out on the spot, and various in-situ test methods were used to test the in-situ mechanical strength of diatomite. The results show that the moisture content of diatomite is very high, the density is very low and the pore ratio is large. It is found that the shear strength of diatomite in laboratory test is consistent with that obtained by in situ test, but compared with the shear strength, the compressive strength of diatomite is obviously higher than that of shear strength.
【作者单位】： 中交第四航务工程勘察设计院有限公司;
【分类号】：U652.2
，
本文编号：2509808
[Abstract]:In the course of carrying out a project in Namibia, a special kind of soil, diatomite, was encountered. The composition and microstructure of diatomite were further determined by X-ray diffraction test and thermal field emission electron microscope scanning. In view of the special engineering properties of diatomite, a large number of detailed laboratory geotechnical tests and analysis were carried out on the spot, and various in-situ test methods were used to test the in-situ mechanical strength of diatomite. The results show that the moisture content of diatomite is very high, the density is very low and the pore ratio is large. It is found that the shear strength of diatomite in laboratory test is consistent with that obtained by in situ test, but compared with the shear strength, the compressive strength of diatomite is obviously higher than that of shear strength.
【作者单位】： 中交第四航务工程勘察设计院有限公司;
【分类号】：U652.2
，
本文编号：2509808
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