【摘要】：在實施納米比亞某項目的勘察過程中,遇到了一種特殊土——硅藻土。通過X射線衍射試驗和熱場發(fā)射電鏡掃描進一步確定了硅藻土的成分組成和微觀結(jié)構。針對硅藻土的特殊工程性質(zhì),現(xiàn)場采取土樣進行大量細致的室內(nèi)土工試驗分析,并運用多種原位試驗手段,測試硅藻土的原位力學強度。測試結(jié)果表明硅藻土的含水量非常高、密度極低、孔隙比大,通過對比發(fā)現(xiàn)硅藻土的室內(nèi)試驗剪切強度與通過原位試驗獲得的原位剪切強度較為一致;但與抗剪強度相比,其抗壓強度明顯高于抗剪強度。
[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.
【作者單位】： 中交第四航務工程勘察設計院有限公司;
【分類號】：U652.2
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本文編號：2509808