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首页> 外文期刊>Arabian Journal for Science and Engineering. Section A, Sciences >Estimation of Reconstructed Strength of Disturbed Biologically Cemented Sand Under Unconfined Compression Tests
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Estimation of Reconstructed Strength of Disturbed Biologically Cemented Sand Under Unconfined Compression Tests

机译：无束压缩试验下干扰生物粘合砂的重建强度的估算

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摘要

One of the most important characteristics of soils is their resistance to structural loads. Improvement of mechanical properties of soils can help to control soil stresses and deformations. There are different methods for this purpose. One of the latest methods for stabilization of soils, which is a combination of chemistry and biological sciences, is the use of calcium carbonate microbiological sediment as a suitable injectionmaterial. In this study, the effects of using a bacterium spore called Bacillus pasteurii and production of biological deposition of calcium carbonate on improvement of the mechanical properties of sandy soils through the production of sandstone have been investigated. According to the results, when the calcium chloride in Bacillus pasteurii matrix is injected into the sandy soils, the strength of these soils increases. After this kind of cementation, an increase of considerable amount of water content, which is a kind of disturbance in the samples, can reduce the bio-cemented strength. This time, if we let the samples go for a period of time (about 24 h), the soil will revert to some part of its former strength and it can modify itself. This kind of strength is called reconstructed strength in this study. This research is designed to investigate the reconstructed strength of biocemented sands under unconfined compression tests. Results of the study show the strength of disturbed bio-cemented samples is sensitive to the void ratio.
机译：土壤中最重要的特征之一是它们对结构载荷的抵抗力。土壤机械性能的改善可以帮助控制土壤应力和变形。为此目的有不同的方法。稳定土壤的最新方法之一，即化学和生物科学的组合，是使用碳酸钙微生物沉积物作为合适的注射材料。在这项研究中，研究了使用烧伤芽孢杆菌孢子的细菌孢子和碳酸钙的生物沉积的影响通过生产砂岩生产砂岩的机械性能。根据结果​​，当山丘脊椎菌中的氯化钙注入砂土中时，这些土壤的强度增加。在这种胶结之后，增加了大量的水含量，这是样品中的一种干扰，可以降低生物粘合强度。这次，如果我们让样品持续一段时间（约24小时），土壤将恢复到其以前的某些部分，并且可以修改自己。这种强度称为该研究中的重建强度。本研究旨在研究在无束压缩测试下的生物沉砂的重建强度。研究结果表明，干扰生物粘合样品的强度对空隙率敏感。

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