International Journal of Civil Infrastructure最新文献_第2页

Laboratory Pullout Testing Of Biaxial Geogrid in Sand-Crumb Rubber Mixtures 砂屑橡胶混合料中双轴土工格栅的室内拉拔试验

International Journal of Civil Infrastructure Pub Date : 1900-01-01 DOI: 10.11159/ijci.2022.007

T. Bandyopadhyay, P. Chakrabortty, A. Hegde

{"title":"Laboratory Pullout Testing Of Biaxial Geogrid in Sand-Crumb Rubber Mixtures","authors":"T. Bandyopadhyay, P. Chakrabortty, A. Hegde","doi":"10.11159/ijci.2022.007","DOIUrl":"https://doi.org/10.11159/ijci.2022.007","url":null,"abstract":"In the present study, a series of pullout tests were conducted to understand the sand-crumb rubber interaction behaviour with biaxial geogrid. Six different crumb rubber–sand mixtures with mixing ratios of 0:100, 10:90, 20:80, 30:70, 40:60 and 50:50 by volume were studied. Pullout tests were conducted at five different normal stresses (i.e., 20 kPa, 40 kPa, 60 kPa, 80 kPa and 100 kPa), where pullout forces were applied to the geogrid specimen at a constant strain rate of 1 mm/min. The normal stress-dependent pullout capacity was obtained from each test. The peak pullout load was observed at the verge of the failure of the geogrid. Two different types of failure of the geogrid were observed (i.e., slippage and rupture failure). The pullout test results were interpreted in terms of pullout resistance factor (F), which represents the interaction between backfill material and geogrid specimen. The resistance factor was found to increase with the increase in rubber percentage in the mix from 10% to 30%. The maximum value was found to be 1.07 at 30% rubber percentage in the mixture at 20 kPa normal stress. However, at 40% rubber percentage in the mixture, F was found to reduce. A similar trend was also observed for other normal stresses. Furthermore, strain variation in the geogrid due to pullout loading was also studied. The strain was found to decrease with the addition of rubber content. Strain reduced by 48% at 30% rubber content. Hence, the 30:70 mixing ratio of rubber-sand showed the highest interaction, thus giving the optimum pullout capacity of the","PeriodicalId":371508,"journal":{"name":"International Journal of Civil Infrastructure","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115365121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

The use of Geographic Information System for the Assessment of Geotechnical Risks in Madagascar 利用地理信息系统评估马达加斯加的岩土工程风险

International Journal of Civil Infrastructure Pub Date : 1900-01-01 DOI: 10.11159/ijci.2022.002

Andriamalala Anjaramanantenasoa Nirina Miraniaina, Goodary Al-Rajeshwar, Ratoarivelo Manitriniala

{"title":"The use of Geographic Information System for the Assessment of Geotechnical Risks in Madagascar","authors":"Andriamalala Anjaramanantenasoa Nirina Miraniaina, Goodary Al-Rajeshwar, Ratoarivelo Manitriniala","doi":"10.11159/ijci.2022.002","DOIUrl":"https://doi.org/10.11159/ijci.2022.002","url":null,"abstract":"The Upper City of Antananarivo, is one of the districts of the capital of Madagascar subject to the regulations of the Architectural, Urban and Landscape Heritage Protection Zone [1]. On the other hand, the urbanization of this zone has not made it possible to curb the uncontrolled urbanization which is characterized by the spontaneity of illicit constructions caused in particular by the impoverishment of the local populations. Faced with this situation, the sanitation aspect of the area is no longer under control and all these phenomena have created a new type of exposure to risk through the degradation of the supporting soil and the triggering of fatal land movements. This urbanized area is subject to geotechnical risks that require reconnaissance on geological structuring, urbanization and problems observed to monitor the evolution of hazards. Technical studies of the Antananarivo upper town massif reveal instability and eventually hazards such as landslides, rock falls and block falls. These rapid phenomena expose local populations to new risks. As such, the consideration of risk management in this area and its mapping using Geographic Information Systems (GIS) is vital. The objective of this paper is to draw up maps of urbanization and geotechnical hazards in the area concerned in order to monitor the evolution of risks and to alert the populations to the danger that may occur. Results of the research will provide operational solutions, especially in the decision-making process of local authorities regarding the evolution of these hazards and the sporadic evolution of housing in the upper city of Antananarivo, leading to the implementation of a continuous monitoring system, with alarm triggering on threshold detection the Early Warning","PeriodicalId":371508,"journal":{"name":"International Journal of Civil Infrastructure","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124955779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessment of Georisks and Sustainability Resource for Islands in the South Indian Ocean Region 南印度洋区域岛屿地质风险和可持续资源评估

International Journal of Civil Infrastructure Pub Date : 1900-01-01 DOI: 10.11159/ijci.2022.003

V. Iegupov, R. Goodary, Yeshvin Goodary

引用次数: 0

Rediscovering the Ancient Cob Wall of Madagascar for Potential Green and Economical Construction 重新发现马达加斯加古岩芯墙的绿色和经济建设潜力

International Journal of Civil Infrastructure Pub Date : 1900-01-01 DOI: 10.11159/IJCI.2021.008

Andriamalala Anjaramanantenasoa Nirina Miraniaina, Ratoarivelo Manitriniala, G. Rajeshwar, Andriamahefa Augustin

{"title":"Rediscovering the Ancient Cob Wall of Madagascar for Potential Green and Economical Construction","authors":"Andriamalala Anjaramanantenasoa Nirina Miraniaina, Ratoarivelo Manitriniala, G. Rajeshwar, Andriamahefa Augustin","doi":"10.11159/IJCI.2021.008","DOIUrl":"https://doi.org/10.11159/IJCI.2021.008","url":null,"abstract":"Earthen constructions have existed for thousands of years in the world. In Madagascar, remains of over 300 years of construction still exist today and are part of the « Malagasy » heritage. Currently, the construction methodology and the knowhow around the constructions with cob are almost in-existent. The purpose of this research is not only to find the techniques to rebuild with raw earth and to reduce the carbon footprint in civil engineering in Madagascar, but also to provide an economic alternative to concrete constructions. Various samples have been taken and analyzed to determine the formulation of the « Malagasy » cob and to demystify the misleading idea that these types of constructions contain additives of animal origin. Building with earth will definitely reduce cost and maintain sustainability, and once the right composition is determined, it will be possible to provide various architectural designs with a life span of 50 to 100 years, depending on implementation techniques used. Finally, this will lead to the use of abundantly available material locally, hence reduce additional transportation and related costs, yielding recyclable and economical structures. Currently, the ancient construction cultures and eventually, the know-how around the constructions of are practically unknown. The aim of this research is not only to find the techniques to rebuild with raw earth and to reduce the carbon footprint in civil engineering in Madagascar, but also to provide an economic alternative to concrete for the majority of the population. Various samples were taken and analysed to determine the formulation of the \"Malagasy\" cob and to demystify the type of construction with regard to the use of spurious additives of animal origin.","PeriodicalId":371508,"journal":{"name":"International Journal of Civil Infrastructure","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133585139","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Intelligent Data-Driven Models for Simulating Formwork Labour Productivity in High Rise Buildings 高层建筑模板劳动生产率模拟的智能数据驱动模型

International Journal of Civil Infrastructure Pub Date : 1900-01-01 DOI: 10.11159/ijci.2022.001

N. Elshaboury, A. Al-Sakkaf, Ghasan Alfalah, E. M. Abdelkader

引用次数: 0

Methods of Asphalt Petrology: Determination of Permeability Numerical tudy of HSS-to-HSS Moment Connections Subjected to Out-of-Plane Loading: Effect of Connection Eccentricity 面外荷载作用下hss - hss弯矩连接的数值研究:连接偏心的影响

International Journal of Civil Infrastructure Pub Date : 1900-01-01 DOI: 10.11159/ijci.2023.007

J. Joshi, Jianwei Huang

引用次数: 0

Seismic Surface Waves and Borehole Methods to Determine Shear Wave Velocity: A Review of Measurement Practice by Contractors in the UK 确定横波速度的地震表面波和钻孔方法:英国承包商测量实践的回顾

International Journal of Civil Infrastructure Pub Date : 1900-01-01 DOI: 10.11159/ijci.2022.004

K. Kyrkou, M. Frost, P. Fleming, N. Sartain

引用次数: 2

Identifying Soft Soils using Pore-Pressure Parameters: A Machine Learning Approach 利用孔隙压力参数识别软土:一种机器学习方法

International Journal of Civil Infrastructure Pub Date : 1900-01-01 DOI: 10.11159/ijci.2023.002

Jeniffer Viegas, António Gallardo, Lucas Bottaro, Rodrigo Marinaro

{"title":"Identifying Soft Soils using Pore-Pressure Parameters: A Machine Learning Approach","authors":"Jeniffer Viegas, António Gallardo, Lucas Bottaro, Rodrigo Marinaro","doi":"10.11159/ijci.2023.002","DOIUrl":"https://doi.org/10.11159/ijci.2023.002","url":null,"abstract":"- The cone penetration test (CPT) is a widely used method for identifying soil profiles and estimating soil parameters. Numerous correlations have been established to facilitate geo-characterization of soils based on CPT data. However, caution must be exercised when applying these correlations and laboratory tests should be used to validate them. Tropical residual soils are highly variable, even for seemingly similar samples, which can make it difficult for project designers to accurately characterize them. The present work focuses on a case study where the goal was to distinguish and characterize two soft soils existent on the foundation of a tailings dam in the southwest of Brazil. The construction of the dam is still ongoing, and its foundation belongs to a complex geological environment with soft soils that can reach N SPT blows as low as its own weight. The geological survey identifies two horizons of residual soil of dolomitic phyllite: soft and very soft. However, spatially distinguishing this material regarding its consistence has shown to be a challenging task. Since they differ essentially on the degree of weathering, most parameters for both materials are quite similar, and from laboratory tests, the parameter that helps differentiate these soils is the pore pressure Skempton parameter at failure – A f . Based on these findings, it can be inferred that the pore-pressure parameter Bq in CPT represents the excess pore-pressure during the test, whereas Af describes the excess pore-pressure at failure during triaxial tests. Despite the lack of a currently established theoretical correlation between the two parameters, they can offer valuable insight into the soil's response to rapid loading. Notably, both measures have proven to be effective in distinguishing between residual soils, even though they are distinct measures. In this study, the B q and A f parameters are employed to classify soils using an unsupervised learning method, specifically the K-means algorithm. The resulting clusters exhibit strong agreement with borehole profiles near the CPT locations.","PeriodicalId":371508,"journal":{"name":"International Journal of Civil Infrastructure","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116498116","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Methods of Asphalt Petrology: Determination of Permeability 沥青岩石学方法:渗透率的测定

International Journal of Civil Infrastructure Pub Date : 1900-01-01 DOI: 10.11159/ijci.2023.006

Leandro Harries, Maximilian Schütz, David Kempf, Jia Liu

引用次数: 0

Settlement Characteristics Due to Excavate Two Parallel Tunnels through a Fill Slope 填土边坡开挖两条平行隧道沉降特性研究

International Journal of Civil Infrastructure Pub Date : 1900-01-01 DOI: 10.11159/ijci.2022.013

Xinrong Liu, Lojain Suliman, Xiaohan Zhou, Ahmed Abd Elmageed

引用次数: 0