Engineering geology of residual soil derived from mudstone in Zimbabwe
Engineering geology of residual soil derived from mudstone in Zimbabwe
复制标题
津巴布韦泥岩残积土的工程地质
DOI：
10.1016/j.enggeo.2020.105785
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发表时间：
2020-08
影响因子：
7.4
通讯作者：
Wang Gang
中科院分区：
文献类型：
--
作者：
Zhang Xianwei;Liu Xinyu;Chen Cheng;Kong Lingwei;Wang Gang
随着越来越多的土木工程工作在泥岩残积土上进行，系统地评估其地质工程性质变得非常重要。因此，在这项研究中，通过一系列全面的实验室测试，以评估物理，机械，矿物学和微观结构的变化，泥岩衍生残留土壤的属性进行了评估。结果表明，这些土的物理性质是不够的，在工程应用方面，这些土可以归类为高塑性粘土，很难压实。天然泥岩衍生的残积土在水下经历严重的崩解，而重塑的例子是类似的，但往往表现出更稳定的反应。天然泥岩残积土在受到剪切和压缩时表现出结构性;这些土壤类型具有上级天然抗剪性，但其强度在饱和后以及在湿润和干燥循环中显著降低。数据表明，泥岩衍生的残积土的微观结构的特点是存在的聚合物与裂缝，虽然这些聚合物之间的含铁胶结是负责高土壤强度，债券可能会被损坏，甚至破坏，当样品饱和或受到潮湿和干燥循环，导致剪切强度降低。研究结果为相关工程应用提供了明确的参数，并加深了我们对残留泥岩衍生土的理解。
As increasing amounts of civil engineering work are carried out on mudstone-derived residual soils, it has become important to systematically assess their geological engineering properties. Thus, the properties of mudstone-derived residual soils were evaluated in this study via a series of comprehensive laboratory tests to assess physical, mechanical, mineralogical, and microstructural variations. Results show that the physical properties of these soils are inadequate in terms of engineering applications; these soils can be classified as highly plastic clays that are hard to compact. Natural mudstone-derived residual soils undergo severe disintegration underwater while remolded examples are similar but tend to exhibit more stable responses. Natural mudstone-derived residual soils behave in a structured way when subjected to shear and compression; these soil types possess superior natural shear resistance but their strength decreases significantly following saturation as well as in wetting and drying cycles. Data show that the microstructures of mudstone-derived residual soils are characterized by the presence of aggregations with fissures; although iron-bearing cementation between these aggregations is responsible for high soil strength, bonds can be damaged, or even destroyed, when samples are saturated or subjected to wetting and drying cycles leading to a reduction in shear strength. The results of this research provide clear parameters for related engineering applications and enhance our understanding of residual mudstone-derived soils.
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影响因子：
7.4
作者：
E. R. Tuncer;R. A. Lohnes
通讯作者：
E. R. Tuncer;R. A. Lohnes
干湿季节对雷州半岛玄武岩残积土崩解特性的影响
影响因子：
1.4
作者：
Zhang X. W.;Kong L. W.;Li J. J.
通讯作者：
Li J. J.
DOI：
10.1002/9781119106616
发表时间：
2016-05
期刊：
--
影响因子：
--
作者：
P. Lade
通讯作者：
P. Lade
DOI：
10.1201/9780203024621
发表时间：
2004-06
期刊：
--
影响因子：
--
作者：
G. S. Sew;F. Ali;B. Huat
通讯作者：
G. S. Sew;F. Ali;B. Huat
DOI：
10.1061/(asce)1090-0241(2005)131:10(1264
发表时间：
2005-10
影响因子：
3.9
作者：
J. H. Pereira;D. Fredlund;M. C. Neto;G. Gitirana
通讯作者：
J. H. Pereira;D. Fredlund;M. C. Neto;G. Gitirana