检索结果-南通市图书馆

Characterization and Geotechnical classification of Soils and Lateritic Gravelly materials along the Songololo-Lufu Road Axis (Kongo Central Province, DR Congo)

引用

Journal of Geoscience and Environm.nt Protection 2024年第5期12卷 355-372页

作者： Jean-Luc Albini Tshupa Blaise mutombo Kabulu Ivon ndala Tshiwisa clém.nt n’zau um.a-di-m.udi Geo-Hydro-Energy Research Group Geosciences Department Faculty of Sciences and Technologies University of Kinshasa Kinshasa Democratic Republic of Congo Geosciences Departm.nt Faculty of Sciences and Technologies University of Kinshasa Kinshasa Democratic Republic of Congo Geological and mining Research Center (CRGm) Kinshasa Democratic Republic of Congo Polytechnic Faculty President Joseph Kasa-Vubu University Boma Democratic Republic of Congo

This study aims to characterize from a geotechnical point of view, the soils as well as the lateritic gravels along the Songololo-Lufu road route in the Kongo Central Province in the Democratic Republic of Congo (DRC). Ten soil samples and eight lateritic gravel samples were analysed and tested in the laboratory. For each sample, identification parameters were determined such as particle size analysis, natural water content, Atterberg limits (plasticity index and consistency index), but also compaction and lift parameters such as optimal water content, maximum dry density and CBR lift index. All materials and soils have been classified according to the Congolese Road Standard (nRC) and according to the American HRB classification. The test results show us that clay soils almost always contain between 70% and 90% fine fraction;the grained fraction represents less than 30% in clay samples. For lateritic gravels soils, the percentage of fine elem.nts varies between 35% and 15%;in sand around 20%;the gravelly fraction represents a little more than 50% of the soil. The majority of soil facies encountered define a plasticity index lower than 15. As for the consistency index, we obtained values greater than 1, both for clayey soils and for gravelly soils. The classification according to nRC defined for these soils the types Ae1 and Ae2 for the clayey facies and the types GL1 and GL2 for the gravelly soils, while that of the HRB identified the classes and subclasses A-6 and A-7-6 for clayey soils, and subclass A-2-6 for gravelly soils. The optimal water content values obtained range between 10.2% and 23.10%;the maximum dry densities are between 1.66 and 2.07 t/m3 and the CBR index is between 6 and 26. As for the lateritic gravels materials of the Songololo region, the percentage of fine elem.nts generally remains between 12% and 31%;the plasticity index is between 8 and 18;the optimal dry density is around 2 t/m3;the optimal water content is between 9.

关键词： Songololo-Lufu Lateritic Gravels classification Geotechnical nRC

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Structural Study of the Kakobola Area and Its Surroundings by Detecting the Edges of Gravity Anomaly Sources

引用

Journal of Geoscience and Environm.nt Protection 2023年第7期11卷 81-97页

作者： Albert mbata muliwavyo Jonathan musitu muliwavyo Jean-marie Tshitenge mbuebue Lumière musitu clém.nt n’zau um.a-di-m.udi m.ntion Physics Faculty of Science and Technology University of Kinshasa Kinshasa Democratic Republic of Congo Geo-Hydro-Energy Research Group Geosciences Mention Faculty of Sciences and Technologies University of Kinshasa Kinshasa Democratic Republic of Congo m.ntion Geosciences Faculty of Sciences and Technologies University of Kinshasa Kinshasa Democratic Republic of Congo Geo-Hydro-Energy Research Group Faculty of Science and Technology University of Kinshasa Kinshasa Democratic Republic of Congo Faculté Polytechnique Université d’Etat Président Joseph Kasa-Vubu Boma Democratic Republic of Congo

The area covered by this study is the county of Kakobola and its surroundings. Previous studies show that those related to the study of depths by the gravity method, using other techniques, are not always carried out until now. The main goal of this article is the gravimetric characterization of our area by other approach. The interest is not only to map the lineam.nts and to know their dip, but also to estimate the depths of these different anomalies. The methods used for this study are the first total horizontal derivative (FTHDT), tilt angle (TA), analytical signal (AS) and horizontal gradient magnitude (HGm). The processing of the complete Bouguer anomalies (CBA) data was done mainly through software. Data analysis using the semi-finished body depth method shows depths ranging from 7.49 m to 224.6 m. Data analysis using the AS method shows values ranging from 41.7 mGal/m to 510 mGal/m. The fractures and/or geological contacts in our study area show dips ranging from -73.73° to 68.16° and north-South orientation according to the tilt angle method. The FTHDT shows several lineam.nts, a nE oriented fracture of Kakobola and low dip values which suggest a tabular structure of the subsurface in our study area. According to the HGm, the study area shows several preferential directions of fractures and/or geological contacts whose the most frequent directions are the nnE-SSW and WnW.

关键词： First Total Horizontal Derivative Tilt Angle Analytical Signal dips Depths

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：