检索结果-南通市图书馆

Study of Slope Stability Using the Bishop Slice Method: An Approach Combining Analytical and Numerical Analyses

Open Journal of Applied Sciences 2023年第8期13卷 1446-1456页

作者： Koffi Judicael Agbelele Guy Oyeniran Adeoti daniel yémalin agossou Gérard Gbaguidi Aïsse National School of Technical Education (ENSET) Lokossa Republic of Benin National University of Sciences Technology Engineering and Mathematics (UNSTIM) Abomey Republic of Benin Laboratory of Test and Studies in Civil Engineering (L2EGC) Abomey Republic of Benin Materials and Structures Laboratory (LAMS) Cotonou Republic of Benin

The importance of slope stability in civil engineering cannot be underestimated, as failure of these structures can result in significant damage to downstream infrastructure and property. In this study, we used the Bishop slice method, combining both an analytical approach and a numerical approach using the SLOPE/W module of the Geostudio 2018 R2 software. The results obtained from these two methods showed that increasing soil cohesion helps to improve slope stability. The safety coefficients obtained by the analytical method vary between 0.621 and 1.422, while those obtained by the numerical method vary between 0.622 and 1.447, for cohesion values ranging from 4 kPa to 20 kPa. The results obtained by these two methods show a linear relationship between the safety coefficients and soil cohesion. The equation of the analytical method is y = 0.0496x + 0.4407, while that of the numerical method is y = 0.0512x + 0.4357. The results of the analytical approach indicate that a safety coefficient of 1.5 is reached when the cohesion reaches a value of 22 kPa, while the numerical approach shows a safety coefficient of 1.5 reached at a cohesion of 21 kPa. The difference between these two cohesion values can be explained by the number of slices used, which is smaller in the analytical method. However, the equation derived from the analytical method can be used as a general guide to assess the evolution of the safety coefficient of an overloaded slope in long-term behaviour with an increase in cohesion. However, it is important to stress the importance of verification using specialised software based on the finite element method.

关键词： Slope Stability Safety Factor Cohesion

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

Numerical Modeling of the Behaviour of a Road Structure on Compressible Soil: Case of the Road Section at the Beau-Rivage-Djassin Intersection

引用

Open Journal of Civil Engineering 2023年第2期13卷 326-341页

作者： yémalin daniel agossou Judicael Agbelele Peace Hounkpe daniel Djossou Wilfried Hode Edmond Adjovi L2EGC/ENSTP-Abomey Materials and Structure Team National University of Sciences Technologies Engineering and Mathematics Abomey Benin ENSET Lokossa National University of Sciences Technologies Engineering and Mathematics Lokossa Benin HAS Engenering Conseils Abomey-Calavi Benin

This document presents a study of the behaviour of a pavement structure on compressible soil and the evaluation of its durability. The objective of this study is to highlight the impact of taking into account the non-linear elastic behaviour of soils and granular materials in the design process. To this end, a numerical modelling of the pavement of the beau-rivage-Djassin crossroads section in Porto-Novo was carried out, based on a compressible soil whose behaviour will be considered elastoplastic. The subgrade soil on the section is made up of several sub-layers. The layer of soft, highly plastic clay was modelled according to a modified Cam Clay behaviour, a model of swelling clay soils. The fine sand layer and the granular layers of the structure are modelled according to Mohr-Coulomb behaviour. The loading is considered to be uniformly distributed according to the assumptions of the Burmister model in the French standard. A first verification with ALIZE allowed to validate the structure on the basis of the rutting deformation at the head of the platform εz = 359.6*10-6 which remains lower than the admissible deformation εz,adm = 360*10-6. The numerical calculation was carried out using the finite element method, the code of which is implemented under the PLAXIS v21 software. A comparative study with the results of the ALIZE design revealed that the numerically calculated strains εz = 585*10-6 are higher than those of ALIZE. These numerical strains, which are higher than the elastic strains, do not meet the validation criteria that the strains under loading must remain below the allowable strains. An evaluation of the pavement durability was carried out and it was found that the pavement would only last under traffic for 3 years before the first fatigue deformations appeared.

关键词： MEF Elastoplastic Behaviour Modified Cam Clay Mohr Coulomb PLAXIS ALIZE

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

Physical Characterization of Laterite for the Formulation of Structural Concrete

引用

Open Journal of Civil Engineering 2023年第3期13卷 411-426页

作者： Dekandji Thomas Ekpo yemalin daniel agossou Judicial Agbelele Edmond C. Adjovi INSTI Lokossa National University of Sciences Technologies Engineering and Mathematics Abomey Benin L2EGC/ENSTP Materials and Structure Team National University of Sciences Technologies Engineering and Mathematics Abomey Benin

This study presents another approach to the use of laterite as a common construction material for the development of a new type of concrete. Laterites are found all over the world and are used in various ways in road construction as sub-base, base course or wear courses. Being a material consisting in the raw state of sand and gravel, the study addresses its use for the formulation of structural concrete. The physical characterization made it possible to identify three granular classes distributed as follows: 28.26% passing at 80 μm, 32.12% sand (0.08/4 mm) and 39.62% nodule (4/25) mm. The absolute density of the aggregates varies from 2.73 and 2.82 from the sand to the nodules. The absorption rate varies from 3.01% and 5.71% respectively for sand and nodules. The granular compactness of the different granular classes studied varies from 0.580 to 0.630. The formulation of the concrete was made by the method of absolute volumes by varying the W/C ratio from 0.4 to 0.7, N/S from 2.2 to 2.8 and that of the cement dosage from 350 to 450 kg/m3. The results obtained show that the density of the concrete formulated based on these aggregates of lateritic origin have a density which varies between 2000 and 2300 kg/m3. With a cement content of 400 kg/m3, a W/C ratio of 0.4 and N/S of 2.8, concrete based on lateritic aggregates offers better mechanical performance in compression of approximately 21.23 ± 1.24 MPa at 28 days. This strength class obtained allows laterite concrete to be used as structural concrete in the structure of civil engineering works.

关键词： Laterite Concrete Granular Compactness Mechanical Strength

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

Study of the Thermal Characteristics of a Geomaterial:Case of SavèGranites in the Republic of Benin

引用

Journal of Environmental Science and Engineering(A) 2023年第4期12卷 151-161页

作者： Koffi Judicaël Agbelele daniel yemalin agossou Kocouvi Agapi Houanou Bachir Kolade Adelakoun Ambelohoun Sakala Complice Decoursel Curtis Gérard Gbaguidi Aïsse Higher Normal School of Technical Education(ENSET) LokossaRepublic of Benin Laboratory of Materials and Structures(LAMS) Verechaguine AK Higher SchoolCotonouRepublic of Benin Laboratory of Energetics and Applied Mechanics(LEMA) EPAC UACAbomey-CalaviRepublic of Benin Civil Engineering Testing and Research Laboratory(L2EGC) ENSTPAbomeyRepublic of Benin

This work focuses on the valorization of local *** rock that is granite,a material used in construction thanks to its mechanical resistance,is the subject of our *** granite of the commune of Savè,made it possible to appreciate the thermal behavior of this rock studied with a view to its use as a building *** this end,a thermal diffusivity measurement test was carried out on this ***,we made samples which were then connected to a data acquisition box via thermocouples.A Python script is used to ensure the collection of temperature values over *** this thermal diffusivity test carried out on the granite taken from the Savèbreasts,we obtained an average diffusivity a=5.84×10^(-6)m^(2)/*** a result,the thermal effusivity and the heat capacity of the material were determined having respectively the value 1,351.09 J/(K·m^(2)·s^(1/2))and 547,945.21 J/(m^(3)·K).These different results highlight a thermal characterization of Savègranites as a relevant material in the design and construction of an energy-efficient eco-housing.

关键词： Local materials thermal diffusivity thermal conductivity thermal effusivity heat capacity

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

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

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：