Journal of Civil Engineering Research & Technology最新文献

{"title":"A Review of Adoption of Building Information Modelling (BIM) for the Nigerian Building and Construction Industry","authors":"P. Oladayo, A. O. Olanipekun, Omoyajowo Nicholas Ipinlaye","doi":"10.47363/jcert/2024(6)156","DOIUrl":"https://doi.org/10.47363/jcert/2024(6)156","url":null,"abstract":"Building information modelling (BIM), which is a technological advancement that is crucial for modernizing construction work and enhances value for stakeholder groups, has had a big impact on the construction industry from the implementation stage to the decommissioning phase of the project cycle.","PeriodicalId":210581,"journal":{"name":"Journal of Civil Engineering Research & Technology","volume":"20 47","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140409215","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}

{"title":"Legal Perspectives of the Concept of Nature-Based Solutions in Costal Areas","authors":"Ouattara Yamissa","doi":"10.47363/jcert/2024(6)155","DOIUrl":"https://doi.org/10.47363/jcert/2024(6)155","url":null,"abstract":"","PeriodicalId":210581,"journal":{"name":"Journal of Civil Engineering Research & Technology","volume":"21 24","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140409353","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}

{"title":"Molecor´s Application for Digitalizing and Geolocating Water Infrastructure Networks","authors":"Dolores Herran","doi":"10.47363/jcert/2024(6)152","DOIUrl":"https://doi.org/10.47363/jcert/2024(6)152","url":null,"abstract":"ABSTRACT MOLECOR continuing with its line of leading water infrastructure sector with its technological products, has recently developed a software that can be used through a mobile application or web browser with which users can digitalize and geolocate the different pieces that form a water infrastructure network. Short Summary: Water infrastructure management has been a challenge due to its complexity, dynamism, and the multiple stakeholders involved. The emergence of new technologies such as Apps, AI, IoT, and sensors opened up new opportunities for water network management. The digitalization and geolocation of the network is the steppingstone for further developments, providing significant advantages such as reducing costs, improving traceability and accountability, and increasing environmental friendliness","PeriodicalId":210581,"journal":{"name":"Journal of Civil Engineering Research & Technology","volume":"98 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140471109","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}

{"title":"Analysis of Risk Level Mapping of Flash Flood in the Air Betung Sub-Watershed, Pagar Alam City, Indonesia","authors":"A. Syarifudin, H. R. Destania","doi":"10.47363/jcert/2024(6)154","DOIUrl":"https://doi.org/10.47363/jcert/2024(6)154","url":null,"abstract":"This research aimed to obtain a map of flood and inundation distribution in the Air Betung Sub-watershed of Pagar Alam City at an altitude of 200- 1500 meters above sea level. Moreover, the city consists of mountainous and hilly areas, wavy and steep relief, forest areas, and plantations, including settlements and sub-watershed (DAS), characterized by an average annual rainfall of 234.50 mm, with air temperature between 140C-350C. Based on Indonesian Disaster Information Data (DIBI) from National Disaster Management Agency (BNPB) from 2014 to 2019, the Air Betung Sub-watershed has experienced 5 flash flood disasters. These incidents resulted in damage to 1 house unit, irrigation channels ± 50 m, retaining walls ± 25 m, and ± 30 hectares of agricultural land damaged. The method used in this research included Risk Index Mapping to determine the level of flash flood risk by analyzing hazard, vulnerability, and capacity indices. The hazard index was analyzed using Flash Flood Potential Index (FFPI) method, while the vulnerability and capacity indices were evaluated through equations in accordance with Perka BNPP No. 2 of 2012, as processed in the Arc-GIS version 10.4 program. Generally, risk index map research was classified into three classes, namely low, moderate, and high. The results showed that the Pagar Alam Selatan Sub-district had a high index value compared to others in the Air Betung Sub-watershed, Pagar Alam City.","PeriodicalId":210581,"journal":{"name":"Journal of Civil Engineering Research & Technology","volume":"408 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140472988","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}

{"title":"Design of Unplasticized Polyamide 12 Oilfield Line Pipe Based on Published Regression Curves and ASTM F3524","authors":"James F Mason","doi":"10.47363/jcert/2024(6)153","DOIUrl":"https://doi.org/10.47363/jcert/2024(6)153","url":null,"abstract":"The long-term strength of unplasticized polyamide 12 (PA-U12) has been characterized using standard methods for plastic pressure pipe during the qualification process for use in buried piping systems for natural gas delivery operating at low ambient temperatures, usually less than 20 to 30°C at pressures previously served only by steel pipe. The high strength characteristics of the material also made it interesting as a steel substitute for buried and above-ground industrial pressure pipe applications. So far, typical geometries are diameters up to 6 inch (162 mm) with wall thicknesses up to DR9. Assuming a design factor of 0.63 applied to the PPI TR-4 listed HDB, DR9 PA-U12 pipes have a maximum pressure at 23°C of 496 psig (3.4 MPa), although design pressures will typically be lower. These industrial systems can operate at much higher temperatures, up to ~ 50°C for above-ground installations in pipe supports or up to ~ 65°C for surface-laid oilfield pipes. Design engineers need the temperature dependent strength curves to properly design a thermoplastic pressure piping system. Therefore, the regression curves have been extended by LTHS tests up to 120°C. Corresponding test durations enabled to define the location of knees with determination of second branches. These branches are caused by hydrolytic degradation of the polymer resulting in brittleness of the polyamide after long times at elevated temperature in sufficiently wet environments or services. The first appearance of a knee is at 60° C and approximately 44 years. This paper describes various standards to which PA-U line pipe and materials must conform, and the development of standardized, temperature dependent, long-term strength reference curves for PA-U12 pressure pipe, including the transition from ductile to brittle behavior at long times and high temperatures. These curves have been standardized first in DVS and followed by ISO based on the combined LTHS data of pipes made from two different PA-U12 180 compounds and one PA-U11 180 compound. An example of a typical PA-U12 180 pipe design is presented, applying chemical resistance derating factors for oil and gas applications in the design process. Short Summary: Oilfield pipeline design engineers need temperature dependent strength curves to properly design a thermoplastic pressure piping system for use at temperatures often far above the typical range for natural gas distribution. Therefore, LTHS regression curves have been experimentally developed at temperatures up to 120°C to define the location of knees and characterization of second branches. In this paper we describe various standards to which PA-U line pipe and materials must conform, and the development of standardized, temperature dependent, long-term strength reference curves for PA-U12 pressure pipe, including the transition from ductile to brittle behavior at long times and high temperatures. These curves have been standardized in ISO and DVS and apply to both PA-U12 an","PeriodicalId":210581,"journal":{"name":"Journal of Civil Engineering Research & Technology","volume":"31 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139590916","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}

{"title":"Sandbox Testing for Structural Assessment of Plastic Manholes","authors":"Ricky Selle","doi":"10.47363/jcert/2023(6)151","DOIUrl":"https://doi.org/10.47363/jcert/2023(6)151","url":null,"abstract":"Structural behavior of flexible plastic manholes is very different from rigid concrete products. Although this is state-of-the-art knowledge, no international or EN standard exists on structural design of these products. Therefore, traditional soil models and soil pressure coefficients are usually applied if calculations for design checks are required. These models are based on rigid wall structures and pipe design methods and do not adequately account for the flexibility and soil interaction of the manholes in the subsurface 3D-space. Recently a working group was established in Germany to develop a design standard for concrete and plastic manholes. In order to calibrate the design equations for the flexible manholes on experimental data and field experience, an extensive in-situ testing of a PP manhole (DN 1000) in a sandbox was conducted. The comparison of deflection readings and calculation result reveals a great difference. Evidently, the assumption of horizontal soil pressure on plastic manholes is wrong. Only soil pressure coefficients of less than 0.1 give realistic results. This is significantly less than the coefficient for active soil pressure, which is widely used today. Short Summary: The paper presents results from sandbox testing of plastic manholes. It focuses on horizontal deflections resulting from wheel loads at the surface. Explanation is given on why most part of vertical point loads adjacent to flexible manholes is not acting on these products. Theoretical background for this specific behaviour is the load distribution of vertical soil pressure in the subsurface 3D-space. Based on these findings, a range for realistic soil pressure coefficients for actions on plastic manholes is presented.","PeriodicalId":210581,"journal":{"name":"Journal of Civil Engineering Research & Technology","volume":"35 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140479229","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}

{"title":"Prioritizing Port`s Development Directions By Analytic Hierarchy Process Method","authors":"Deda Delovic","doi":"10.47363/jcert/2023(5)150","DOIUrl":"https://doi.org/10.47363/jcert/2023(5)150","url":null,"abstract":"Ports are no longer the simple maritime services providers of the past. They are multimodal transport and logistics centres and hubs for sustainable industry and clean energy. The transition to sustainable ports, digital nodes, and energy hubs requires the radical system-led changes in the ports based on new knowledge and innovation. After a theoretical analysis of port development trends and management models used in the port development process, in this paper is proposed an approach for selecting port development priorities for the future ten years period, based on Analytic Hierarchy Process (AHP) method. Three potential development scenarios are analyzed and evaluated based on following three selection criteria: level of revenue/profit, level of productivity, contribution to safety/security/ environmental protection in the port. AHP Hierarchy framework used was a three level model: “level 0” – goal; “level 1” – criterion; “level 2” – choice. Results of research shown that the optimal development senario is “Scenario 1”, which includes: optimizing utilization rate of existing capacity; optimizing port safety and security; optimizing environmental protection in the port; investing in keeping existing capacity unchanged, with priority investments in building new objects of port superstructure and improvements in cargo handling technologies, in accordance with concrete customer demands; introducing elements of circular economy; Results of the research can be used for prioritizing port development actions and can be taken as a realiable bases of the author`s further reaserches in this domain. Object of the research is the Port of Bar (Montenegro).","PeriodicalId":210581,"journal":{"name":"Journal of Civil Engineering Research & Technology","volume":"118 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139133978","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}

{"title":"Landslides Rainfall One of the Main Triggering Factors in the Mountainous Regions of Puebla, Mexico","authors":"Cuanalo Campos Oscar Andrés","doi":"10.47363/jcert/2023(5)147","DOIUrl":"https://doi.org/10.47363/jcert/2023(5)147","url":null,"abstract":"The rains are one of the main triggers of landslide phenomena in the mountainous region of Puebla, which values reach up 4500 mm/year in some places in this area. Rainfalls combined with other factors such as morphology (mountainous topographic relief with strong inclinations), strongly folded sedimentary rocks (conglomerates, sandstones, siltstones, and limestones), rock discontinuities (fissures, cracks, joints, stratigraphic planes, etc.) and human activity (cuts, excavations, overloads, mining, water discharge, deforestation, land use change, etc.), offer a scenario prone to landslide phenomena that cause human casualties, economic and environmental losses. The landslides disasters have affected many social sectors from these communities (housing, education, health, hydraulic infrastructure, electricity, communication, transportation, public services, agriculture, forestry, etc.), observing that in these sites there are communities of ethnic groups Nahuatls, Totonacs, Otomies and Tepehuas who build their houses out of sheet metal, cardboard, plastic and wood where any natural phenomenon represents a true disaster. This article presents the relationship between hurricanes and torrential rains with the disasters caused in communities in the mountainous region of Puebla. From the analysis of the data obtained from the different meteorological stations installed in the region of interest during a period of 20 years (1999 – 2019), an empirical rainfall threshold of 100 mm/day was determined as a trigger for landslides in the region of study. The aforementioned value is very important data for Civil Protection Government Authorities in order to establish actions and strategies for mitigation and risk management due to landslides. From this rain threshold, evacuation actions are put into operation to reduce the vulnerability of exposed and fragile communities which are immediately transferred to protection shelters","PeriodicalId":210581,"journal":{"name":"Journal of Civil Engineering Research & Technology","volume":"115 42","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139134250","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}

{"title":"Research on the Impact of Ningbo Meishan Port Terminal Project on the Surrounding Submarine Topography","authors":"Ye Linan","doi":"10.47363/jcert/2023(5)149","DOIUrl":"https://doi.org/10.47363/jcert/2023(5)149","url":null,"abstract":"The changes in the surrounding seabed topography during ocean engineering construction are a key technical issue in the development and construction of coastal engineering, which is beneficial for the protection of the nearshore marine environment and the development and utilization of resources. This study analyzes the changes in the surrounding seabed topography before construction (2011), during construction period (2016, 2017), and after construction (2022) based on the measured seabed topography data of four voyages of the Ningbo Meishan Port Terminal Project from 2011 to 2022. Research has found that the actual survey area of the Meishan Port Terminal Project has a total of approximately 1.638 million cubic meters of sedimentation and 1.963 million cubic meters of erosion. After the erosion and sedimentation offset, the overall net erosion in the actual survey area is about 325000 cubic meters. Overall, when conducting artificial engineering in the surrounding sea area of the Ningbo Meishan Port Terminal Project, efforts should be made to avoid significantly changing the hydrodynamic conditions, which may affect the surrounding seabed topography and thus have adverse effects on the surrounding marine environment","PeriodicalId":210581,"journal":{"name":"Journal of Civil Engineering Research & Technology","volume":"91 14","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139132009","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}

{"title":"A Comparative Analysis of The Effectiveness of Plantain Peels and Papaya Seeds for Wastewater Treatment","authors":"Jeje Jo","doi":"10.47363/jcert/2023(5)148","DOIUrl":"https://doi.org/10.47363/jcert/2023(5)148","url":null,"abstract":"This study investigated the effectiveness of plantain peels and papaya seeds used as natural coagulants on the physicochemical properties of wastewater obtained from the oxidation pond at Obafemi Awolowo University (OAU), Ile-Ife. Water quality parameters; Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), turbidity, alkalinity, total solid (TS), total suspended solid (TSS) and pH were determined for raw wastewater. Prepared coagulants of 25 ml concentration (1%, 2% and 3%) of plantain peels and papaya seeds were added to 500 ml of wastewater and the mixture stirred rapidly for 60 seconds and then slowly for two minutes. The treated wastewater samples were then allowed to settle for 24 hours before rechecking the wastewater parameters. Comparing the results and taking the concentration of 5000 mg/L as the most effective for both coagulants, all the results are within the WHO standard except for BOD result which can be said to require higher concentration or dosage of coagulant for significant removal. Papaya seed coagulants was observed to be more effective in the reduction of TSS (95.7%), turbidity (77.8%), BOD (33.3%), alkalinity (25%) and COD (62.3%) while plantain peel coagulant proved to be more effective in the reduction of TS (76%), turbidity (77.8%) and pH (40.4%). Based on these results, papaya seeds observed to be more effective in the treatment of wastewater.","PeriodicalId":210581,"journal":{"name":"Journal of Civil Engineering Research & Technology","volume":" 561","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139136857","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}