Dams’ safety affects their expected benefits and puts human life and property, in addition to local public security, at risk, as dams are important pillar infrastructures supporting the sustainable socioeconomic development of a number of countries. As an important means for safe dam operations and management, safety monitoring efforts should permeate all phases of the full lifecycle of dams, including design, construction, and operation, with objectives to be achieved at each phase. Equal emphasis should be placed on the construction and operations of monitoring systems, inspections and instrument observations, evaluation and acquisition of results, and risk warning and analysis feedback. This is to address the pressing issues encountered in routine monitoring work, such as increased effort in construction and decreased effort in management, superficial inspections, inadequate maintenance of monitoring facilities, and an absence of satisfactory analysis of monitoring results. Based on China’s Technical Standard for Concrete Dam Safety Monitoring (GB/T 51416-2020), the systemic nature of the full lifecycle of concrete dam safety monitoring efforts and the “four equal emphases” were elaborated in this paper, revealing a shift from putting more effort on design and construction to focusing on the full lifecycle of monitoring work in a bid to comprehensively improve the safety monitoring and management of dams towards higher standards.
{"title":"Enhancing Safety Monitoring and Management for Concrete Dams: A Comprehensive Lifecycle Approach in China","authors":"Shuai Zhang, Guang Yang, Libing Zhang, Zhiyong Zhao","doi":"10.11648/j.ajce.20231103.12","DOIUrl":"https://doi.org/10.11648/j.ajce.20231103.12","url":null,"abstract":"Dams’ safety affects their expected benefits and puts human life and property, in addition to local public security, at risk, as dams are important pillar infrastructures supporting the sustainable socioeconomic development of a number of countries. As an important means for safe dam operations and management, safety monitoring efforts should permeate all phases of the full lifecycle of dams, including design, construction, and operation, with objectives to be achieved at each phase. Equal emphasis should be placed on the construction and operations of monitoring systems, inspections and instrument observations, evaluation and acquisition of results, and risk warning and analysis feedback. This is to address the pressing issues encountered in routine monitoring work, such as increased effort in construction and decreased effort in management, superficial inspections, inadequate maintenance of monitoring facilities, and an absence of satisfactory analysis of monitoring results. Based on China’s <i>Technical Standard for Concrete Dam Safety Monitoring</i> (GB/T 51416-2020), the systemic nature of the full lifecycle of concrete dam safety monitoring efforts and the “four equal emphases” were elaborated in this paper, revealing a shift from putting more effort on design and construction to focusing on the full lifecycle of monitoring work in a bid to comprehensively improve the safety monitoring and management of dams towards higher standards.","PeriodicalId":7606,"journal":{"name":"American Journal of Civil Engineering","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134970354","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}
Pub Date : 2023-08-09DOI: 10.11648/j.ajce.20231103.11
Naimul Haque Nayem
: The selection of materials is a critical aspect of any construction activity, and there is a significant reliance on man-made materials compared to those sourced from natural resources. The production of man-made construction materials produces significant amounts of carbon dioxide, carbon monoxide, nitrogen dioxide, and other ecologically harmful gases and byproducts. These substances can be deadly and hazardous to both human and environmental health. As a result, the infrastructure sector has become one of the major contributors to environmental deterioration. The recent population growth has led to a significant increase in the demand for man-made materials. To address this pressing need of the current situation, there is a call for sustainable and eco-friendly materials that offer energy efficiency, easy availability, and minimal disturbance to the environment's ecological system. The primary objective of using these green building materials is to mitigate the negative effect of construction projects on both human health and the natural environment. Typically, building materials are chosen based on their physical, chemical, and mechanical properties. However, the selection and utilization of green materials focus on their functional, technical, and financial attributes. Green materials encompass recycled and reused materials, products made through sustainable production practices, locally available resources, or those derived from environmentally friendly sources. The objective of this paper is to describe various green materials that can be used in building construction and emphasize their positive impact on reducing environmental degradation. These materials contribute to the creation of healthy, sustainable buildings that are beneficial for both occupants and the environment
{"title":"The Potential of Sustainable Materials for Green Building Practices","authors":"Naimul Haque Nayem","doi":"10.11648/j.ajce.20231103.11","DOIUrl":"https://doi.org/10.11648/j.ajce.20231103.11","url":null,"abstract":": The selection of materials is a critical aspect of any construction activity, and there is a significant reliance on man-made materials compared to those sourced from natural resources. The production of man-made construction materials produces significant amounts of carbon dioxide, carbon monoxide, nitrogen dioxide, and other ecologically harmful gases and byproducts. These substances can be deadly and hazardous to both human and environmental health. As a result, the infrastructure sector has become one of the major contributors to environmental deterioration. The recent population growth has led to a significant increase in the demand for man-made materials. To address this pressing need of the current situation, there is a call for sustainable and eco-friendly materials that offer energy efficiency, easy availability, and minimal disturbance to the environment's ecological system. The primary objective of using these green building materials is to mitigate the negative effect of construction projects on both human health and the natural environment. Typically, building materials are chosen based on their physical, chemical, and mechanical properties. However, the selection and utilization of green materials focus on their functional, technical, and financial attributes. Green materials encompass recycled and reused materials, products made through sustainable production practices, locally available resources, or those derived from environmentally friendly sources. The objective of this paper is to describe various green materials that can be used in building construction and emphasize their positive impact on reducing environmental degradation. These materials contribute to the creation of healthy, sustainable buildings that are beneficial for both occupants and the environment","PeriodicalId":7606,"journal":{"name":"American Journal of Civil Engineering","volume":"63 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88141546","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}
Pub Date : 2023-04-13DOI: 10.11648/j.ajce.20231102.11
Haowei Ji, Jian Peng, Ming-Jin Ma, Jie Ge
{"title":"Research on Underground Pipeline Detection Method Based on Background Matrix Subtraction and Three-Dimensional Velocity Spectrum","authors":"Haowei Ji, Jian Peng, Ming-Jin Ma, Jie Ge","doi":"10.11648/j.ajce.20231102.11","DOIUrl":"https://doi.org/10.11648/j.ajce.20231102.11","url":null,"abstract":"","PeriodicalId":7606,"journal":{"name":"American Journal of Civil Engineering","volume":"50 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83686412","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}
Pub Date : 2023-03-21DOI: 10.11648/j.ajce.20231101.12
Fajar Ridwan Wijaya
: The Global City is a new paradigm in the development of cities in the globalization era. World cities are world cities that lead to the circulation of capital and information
全球城市是全球化时代城市发展的新范式。世界城市是导致资本和信息流通的世界城市
{"title":"A Comparative Study on Urban Governance in a Global City Phenomena Using Paradigm Analysis and Urban Development Principles","authors":"Fajar Ridwan Wijaya","doi":"10.11648/j.ajce.20231101.12","DOIUrl":"https://doi.org/10.11648/j.ajce.20231101.12","url":null,"abstract":": The Global City is a new paradigm in the development of cities in the globalization era. World cities are world cities that lead to the circulation of capital and information","PeriodicalId":7606,"journal":{"name":"American Journal of Civil Engineering","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88691043","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}
Pub Date : 2023-02-24DOI: 10.11648/j.ajce.20231101.11
Mulatu Tamiru
Expansive soil is a problematic soil due to swelling and shrinkage behavior during moisture variation. Damage to shallow foundations like pavement and footings of residential houses occurred due to these soils. Different scholars deal with stabilizing expansive soils using different mechanisms. This study also evaluated the suitability of Enset fiber with coffee husk ash materials to improve the expansive property of soils found in Jimma town. Different geotechnical parameters were determined for virgin soil and coffee husk ash with virgin soil. After treating the natural soil with varying percentages of coffee husk ash (5%, 10%, 15%, and 20%), the optimum levels of coffee husk ash were determined. Different laboratory tests such as CBR value, compaction test, and Atterberg limits were determined using the optimum coffee husk ash with varying percentages of enset fiber (0.3%, 0.6%, 0.9%, and 1.2%). The study reveals that the addition of coffee husk ash to enset fiber significantly increases the shear strength of expansive soils. With the addition of 15% of coffee husk ash and 0.9% of enset fiber, all tested geotechnical parameters improved the expansive soils to be used as subgrade materials. The soil changed from highly swelled material to poorly swelled material. Therefore, it can be concluded that the reuse of agricultural waste of coffee husk ash with enset fiber is applicable for expansive soil stabilization since it can improve the engineering strength of expansive soils and it is an economic and environmentally friendly material.
{"title":"Suitability of Enset Fiber with Coffee Husk Ash as Soil Stabilizer","authors":"Mulatu Tamiru","doi":"10.11648/j.ajce.20231101.11","DOIUrl":"https://doi.org/10.11648/j.ajce.20231101.11","url":null,"abstract":"Expansive soil is a problematic soil due to swelling and shrinkage behavior during moisture variation. Damage to shallow foundations like pavement and footings of residential houses occurred due to these soils. Different scholars deal with stabilizing expansive soils using different mechanisms. This study also evaluated the suitability of Enset fiber with coffee husk ash materials to improve the expansive property of soils found in Jimma town. Different geotechnical parameters were determined for virgin soil and coffee husk ash with virgin soil. After treating the natural soil with varying percentages of coffee husk ash (5%, 10%, 15%, and 20%), the optimum levels of coffee husk ash were determined. Different laboratory tests such as CBR value, compaction test, and Atterberg limits were determined using the optimum coffee husk ash with varying percentages of enset fiber (0.3%, 0.6%, 0.9%, and 1.2%). The study reveals that the addition of coffee husk ash to enset fiber significantly increases the shear strength of expansive soils. With the addition of 15% of coffee husk ash and 0.9% of enset fiber, all tested geotechnical parameters improved the expansive soils to be used as subgrade materials. The soil changed from highly swelled material to poorly swelled material. Therefore, it can be concluded that the reuse of agricultural waste of coffee husk ash with enset fiber is applicable for expansive soil stabilization since it can improve the engineering strength of expansive soils and it is an economic and environmentally friendly material.","PeriodicalId":7606,"journal":{"name":"American Journal of Civil Engineering","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136166190","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}
Pub Date : 2022-01-01DOI: 10.11648/j.ajce.20221002.16
Ezemerihe Anthony Nnamdi, Nnadi Ezekiel Oluwaseun Ejiofor, Okwu-Delunzu Virginia Ugoyibo
{"title":"Assessment of Stabilized Earth Blocks (STEB) Strength to Sandcrete Blocks Used in Housing Construction","authors":"Ezemerihe Anthony Nnamdi, Nnadi Ezekiel Oluwaseun Ejiofor, Okwu-Delunzu Virginia Ugoyibo","doi":"10.11648/j.ajce.20221002.16","DOIUrl":"https://doi.org/10.11648/j.ajce.20221002.16","url":null,"abstract":"","PeriodicalId":7606,"journal":{"name":"American Journal of Civil Engineering","volume":"158 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86349717","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}
Pub Date : 2022-01-01DOI: 10.11648/j.ajce.20221002.11
Elias Defalgn Debelo, Zerihun Berhane Weldegebriel
{"title":"Effect of Contractor – Subcontractor Relationship on the Performance of Construction Project: A Case Study of Dire Dawa Construction Projects","authors":"Elias Defalgn Debelo, Zerihun Berhane Weldegebriel","doi":"10.11648/j.ajce.20221002.11","DOIUrl":"https://doi.org/10.11648/j.ajce.20221002.11","url":null,"abstract":"","PeriodicalId":7606,"journal":{"name":"American Journal of Civil Engineering","volume":"200 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73167402","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}
Pub Date : 2022-01-01DOI: 10.11648/j.ajce.20221001.13
Xue Botian
{"title":"Study on the Difference of Microwave Irradiation Effect Caused by the Particle Size Distribution of Rock Minerals","authors":"Xue Botian","doi":"10.11648/j.ajce.20221001.13","DOIUrl":"https://doi.org/10.11648/j.ajce.20221001.13","url":null,"abstract":"","PeriodicalId":7606,"journal":{"name":"American Journal of Civil Engineering","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83296515","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}
Pub Date : 2022-01-01DOI: 10.11648/j.ajce.20221001.12
Meshack Kabote, Bavo Blasius Nyichomba
{"title":"An Assessment of Disputes Resolution Mechanisms in Road Construction Projects in Tanzania","authors":"Meshack Kabote, Bavo Blasius Nyichomba","doi":"10.11648/j.ajce.20221001.12","DOIUrl":"https://doi.org/10.11648/j.ajce.20221001.12","url":null,"abstract":"","PeriodicalId":7606,"journal":{"name":"American Journal of Civil Engineering","volume":"38 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84504853","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}
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