Pub Date : 2023-06-30DOI: 10.9798/kosham.2023.23.3.105
Gyu-hwan Cho, J. Ahn, Kisoo Jeon
As industrial facilities, petrochemical plants require prompt investigation, diagnosis, and recovery in the event of fire damage associated with disasters and accidents. Due to the characteristics of petrochemical plants, which are mostly composed of steel structures with fire-resistant coating materials, the coating materials are the first to be damaged. Accordingly, in this study, the fire damage characteristics of fire-resistant coating materials were analyzed experimentally, verifying the possibility of estimating the heating temperatures based on such characteristics. The results show a correlation between the foam expansion ratio and the heating temperature of intumescent fire-resistant coating materials with foam properties. A significant correlation was found between the density and adhesion strength ratio and the heating temperature of spray-applied fire-resistant coatings. The results suggest the possibility of estimating the heating temperatures based solely on the fire damage characteristics of the coating materials, which could provide a platform for simplifying existing methods for investigating and diagnosing fire damage.
{"title":"Fire Damage Characteristics of Fire-Resistant Coating Materials in Petrochemical Plant Facilities","authors":"Gyu-hwan Cho, J. Ahn, Kisoo Jeon","doi":"10.9798/kosham.2023.23.3.105","DOIUrl":"https://doi.org/10.9798/kosham.2023.23.3.105","url":null,"abstract":"As industrial facilities, petrochemical plants require prompt investigation, diagnosis, and recovery in the event of fire damage associated with disasters and accidents. Due to the characteristics of petrochemical plants, which are mostly composed of steel structures with fire-resistant coating materials, the coating materials are the first to be damaged. Accordingly, in this study, the fire damage characteristics of fire-resistant coating materials were analyzed experimentally, verifying the possibility of estimating the heating temperatures based on such characteristics. The results show a correlation between the foam expansion ratio and the heating temperature of intumescent fire-resistant coating materials with foam properties. A significant correlation was found between the density and adhesion strength ratio and the heating temperature of spray-applied fire-resistant coatings. The results suggest the possibility of estimating the heating temperatures based solely on the fire damage characteristics of the coating materials, which could provide a platform for simplifying existing methods for investigating and diagnosing fire damage.","PeriodicalId":416980,"journal":{"name":"Journal of the Korean Society of Hazard Mitigation","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130552555","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 : 2023-06-30DOI: 10.9798/kosham.2023.23.3.1
Ho-Jin Lee, Jinseok Choi, Ohseong Lee, Y. Yoon
In this study, the crack distribution and electromagnetic shielding characteristics of UHPFRCC before and after cracking were evaluated according to fiber combinations. After evaluating the mechanical and electrical properties of each combination, an electromagnetic shielding test of a non-cracked panel specimen was conducted. Subsequently, the panel specimen was subjected to a monotonic load or repeated load. In the case of the test specimen with a repetitive load, the crack length, crack area, and electromagnetic shielding were measured at each load stage. According to the experimental results, the incorporation of organic fiber decreased the compressive strength and density of UHPFRCC. In particular, the incorporation of carbon fibers adversely affected the tensile behavior owing to dispersibility problems. The hybrid fiber combination increased the electrical resistivity. However, the incorporation of carbon fibers improved electromagnetic shielding performance compared with the single incorporation of steel fibers. The fiber combination significantly affected the crack length and width than the crack area. In addition, as cracks occurred, the electromagnetic shielding performance of a test specimen showed an average decrease of up to 20%.
{"title":"Evaluation of the Electromagnetic Shielding Performance of UHPFRCC before and after Cracking","authors":"Ho-Jin Lee, Jinseok Choi, Ohseong Lee, Y. Yoon","doi":"10.9798/kosham.2023.23.3.1","DOIUrl":"https://doi.org/10.9798/kosham.2023.23.3.1","url":null,"abstract":"In this study, the crack distribution and electromagnetic shielding characteristics of UHPFRCC before and after cracking were evaluated according to fiber combinations. After evaluating the mechanical and electrical properties of each combination, an electromagnetic shielding test of a non-cracked panel specimen was conducted. Subsequently, the panel specimen was subjected to a monotonic load or repeated load. In the case of the test specimen with a repetitive load, the crack length, crack area, and electromagnetic shielding were measured at each load stage. According to the experimental results, the incorporation of organic fiber decreased the compressive strength and density of UHPFRCC. In particular, the incorporation of carbon fibers adversely affected the tensile behavior owing to dispersibility problems. The hybrid fiber combination increased the electrical resistivity. However, the incorporation of carbon fibers improved electromagnetic shielding performance compared with the single incorporation of steel fibers. The fiber combination significantly affected the crack length and width than the crack area. In addition, as cracks occurred, the electromagnetic shielding performance of a test specimen showed an average decrease of up to 20%.","PeriodicalId":416980,"journal":{"name":"Journal of the Korean Society of Hazard Mitigation","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128725537","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 : 2023-06-30DOI: 10.9798/kosham.2023.23.3.61
Gihwan Sung, Heecheon Choi
Research on the development of volunteer firefighter systems has highlighted limitations of the South Korean system. These are categorized by a lack of community disaster safety service activities, disaster response cooperation networks, and support to revitalize volunteer firefighters. The US has 676,900 (65%) volunteer firefighters, and their qualifications are similar to full-time firefighters. The National Volunteer Fire Council is self-reliant, and plays practical roles for volunteer firefighters. Various grant programs for volunteer fire brigades are active. Based on the US case, implications for developing Korea’s system include recruiting young talent for sustainability, improving practical education and training systems, strengthening support for volunteer firefighters’ activities, and developing centralized standardization and support programs.
{"title":"A Study on the Improvement of South Korea’s Volunteer Fire Brigade System through the Case of the US","authors":"Gihwan Sung, Heecheon Choi","doi":"10.9798/kosham.2023.23.3.61","DOIUrl":"https://doi.org/10.9798/kosham.2023.23.3.61","url":null,"abstract":"Research on the development of volunteer firefighter systems has highlighted limitations of the South Korean system. These are categorized by a lack of community disaster safety service activities, disaster response cooperation networks, and support to revitalize volunteer firefighters. The US has 676,900 (65%) volunteer firefighters, and their qualifications are similar to full-time firefighters. The National Volunteer Fire Council is self-reliant, and plays practical roles for volunteer firefighters. Various grant programs for volunteer fire brigades are active. Based on the US case, implications for developing Korea’s system include recruiting young talent for sustainability, improving practical education and training systems, strengthening support for volunteer firefighters’ activities, and developing centralized standardization and support programs.","PeriodicalId":416980,"journal":{"name":"Journal of the Korean Society of Hazard Mitigation","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124667740","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 : 2023-04-30DOI: 10.9798/kosham.2023.23.2.29
Chan-Ho Lee, Mooyoung Lim, Yohan Lee
This study aims to develop a model that predicts domestic forest fire occurrences during fire outbreaks using machine learning techniques. For the modeling methods, logistic regression analysis and ensemble techniques, such as gradient boost and random forest, were used while the oversampling technique was utilized to address the imbalance problem of the forest fire data. The model developed in this study predicted 239 out of 333 forest fire occurrences during the nationwide forest fire period in 2020 with a prediction accuracy of approximately 71.8%. Forest fires that occur during such periods are highly influenced by different factors affecting the climate, such as temperature, humidity, and precipitation. In Gangwon-do, in addition to these factors, a high correlation between farmland density and stem volume per hectare has also been associated with increased forest fire occurrences. The significance of this study lies in the fact that it presents a customized wildfire occurrence prediction model that can be used in the administrative parts, which serve as the basic centers for wildfire prevention, of provinces and cities across the country.
{"title":"Machine Learning for Big Data Analytics in Development of Wildfire Prediction Models","authors":"Chan-Ho Lee, Mooyoung Lim, Yohan Lee","doi":"10.9798/kosham.2023.23.2.29","DOIUrl":"https://doi.org/10.9798/kosham.2023.23.2.29","url":null,"abstract":"This study aims to develop a model that predicts domestic forest fire occurrences during fire outbreaks using machine learning techniques. For the modeling methods, logistic regression analysis and ensemble techniques, such as gradient boost and random forest, were used while the oversampling technique was utilized to address the imbalance problem of the forest fire data. The model developed in this study predicted 239 out of 333 forest fire occurrences during the nationwide forest fire period in 2020 with a prediction accuracy of approximately 71.8%. Forest fires that occur during such periods are highly influenced by different factors affecting the climate, such as temperature, humidity, and precipitation. In Gangwon-do, in addition to these factors, a high correlation between farmland density and stem volume per hectare has also been associated with increased forest fire occurrences. The significance of this study lies in the fact that it presents a customized wildfire occurrence prediction model that can be used in the administrative parts, which serve as the basic centers for wildfire prevention, of provinces and cities across the country.","PeriodicalId":416980,"journal":{"name":"Journal of the Korean Society of Hazard Mitigation","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121412639","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 : 2023-04-30DOI: 10.9798/kosham.2023.23.2.51
Seo-Young Kim, Ha-sung Kong
This study aims to use evacuation direction and time as primary data for a situation where one needs to evacuate from a crowd-density place on a ramp by comparing and analyzing the relationship between the evacuation direction and evacuation time with respect to the crowd density on a ramp. The results showed that it took longer to exit the ramp when more than five pedestrians per area passed on the ramp. In addition, reducing the width of the ramp with a faux wall also increased the duration required for pedestrians to evacuate safely. Furthermore, it was found that less time was required to exit the ramp when the pedestrians evacuated in one direction, reducing the risk of accidents. Therefore, this study concludes that when there is a ramped passage at a place with a high crowd density, pedestrians should move in one direction during the evacuation process.
{"title":"Analysis of Evacuation Time and Evacuation Direction with Respect to Crowd Density on a Ramp","authors":"Seo-Young Kim, Ha-sung Kong","doi":"10.9798/kosham.2023.23.2.51","DOIUrl":"https://doi.org/10.9798/kosham.2023.23.2.51","url":null,"abstract":"This study aims to use evacuation direction and time as primary data for a situation where one needs to evacuate from a crowd-density place on a ramp by comparing and analyzing the relationship between the evacuation direction and evacuation time with respect to the crowd density on a ramp. The results showed that it took longer to exit the ramp when more than five pedestrians per area passed on the ramp. In addition, reducing the width of the ramp with a faux wall also increased the duration required for pedestrians to evacuate safely. Furthermore, it was found that less time was required to exit the ramp when the pedestrians evacuated in one direction, reducing the risk of accidents. Therefore, this study concludes that when there is a ramped passage at a place with a high crowd density, pedestrians should move in one direction during the evacuation process.","PeriodicalId":416980,"journal":{"name":"Journal of the Korean Society of Hazard Mitigation","volume":"92 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125972414","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 : 2023-04-30DOI: 10.9798/kosham.2023.23.2.91
Incheol Joo, Jongmuk Won
Suffusion is a type of internal erosion caused by the detachment of fine particles. Additionally, continuous suffusion reduces the stability of geotechnical infrastructures. In this study, the impact of clay mineralogy and sand grain size on the suffusion of sand-clay mixtures was investigated using two-dimensional laboratory experiments on nine different sand-clay mixtures made of three types of sands (K3, K4, and K5) and clays (kaolinite, illite, and bentonite). The breakthrough curve for each sample was obtained for the top/middle/bottom outlets of the designed cell to measure and analyze the amount of detached clay. It was observed that as the sand grain size decreased, the amount of detached clay was more and clays with kaolinite exhibited greater suffusion than those with illite. Bentonite exhibited the lowest amount of detached clay owing to its high swelling potential. The influence of clay mineralogy and sand grain size on the suffusion has been discussed based on the obtained breakthrough curves.
{"title":"Influence of Sand Grain Size and Clay Mineralogy on Suffusion of Sand-Clay Mixtures","authors":"Incheol Joo, Jongmuk Won","doi":"10.9798/kosham.2023.23.2.91","DOIUrl":"https://doi.org/10.9798/kosham.2023.23.2.91","url":null,"abstract":"Suffusion is a type of internal erosion caused by the detachment of fine particles. Additionally, continuous suffusion reduces the stability of geotechnical infrastructures. In this study, the impact of clay mineralogy and sand grain size on the suffusion of sand-clay mixtures was investigated using two-dimensional laboratory experiments on nine different sand-clay mixtures made of three types of sands (K3, K4, and K5) and clays (kaolinite, illite, and bentonite). The breakthrough curve for each sample was obtained for the top/middle/bottom outlets of the designed cell to measure and analyze the amount of detached clay. It was observed that as the sand grain size decreased, the amount of detached clay was more and clays with kaolinite exhibited greater suffusion than those with illite. Bentonite exhibited the lowest amount of detached clay owing to its high swelling potential. The influence of clay mineralogy and sand grain size on the suffusion has been discussed based on the obtained breakthrough curves.","PeriodicalId":416980,"journal":{"name":"Journal of the Korean Society of Hazard Mitigation","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121878951","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 : 2023-04-30DOI: 10.9798/kosham.2023.23.2.41
Namgyun Kim, Byong-Woon Jun
In this study, a comparative analysis was conducted for the debris flow that occurred in Gokseong-gun, Jeollanam-do, in August 2020, using the difference between the resolution of topographic information and grid size. High-resolution topographic information (0.03 m) was established through photogrammetry. For comparison, the low-resolution topographic information was obtained from the contour lines of the 1:5000 digital map. The topographic information was depicted as a grid, with resolutions of 1, 5, and 10 m, and analyzed by setting the simulation grid size to 1, 5, and 10 m. According to the topographic resolution, no significant difference was obtained in the numerical simulation results, when high-resolution topographic information from UAV photogrammetry was used, and the analysis was similar to the actual debris flow. Additionally, when the size of the analysis grid for the simulation was 10 m, the simulation was very similar to the actual debris-flow situation. For predicting a risk area using a debris-flow model, it is very important to reflect actual information, such as topography, geology, and rainfall; technical parameters, such as the grid size, are also important. Moreover, determining the optimal grid size by considering the conditions of the study area, such as the basin area, is necessary.
{"title":"Comparative Analysis of Debris Flow Numerical Simulation Based on the Difference between the Resolution of Topographic Information and Grid Size","authors":"Namgyun Kim, Byong-Woon Jun","doi":"10.9798/kosham.2023.23.2.41","DOIUrl":"https://doi.org/10.9798/kosham.2023.23.2.41","url":null,"abstract":"In this study, a comparative analysis was conducted for the debris flow that occurred in Gokseong-gun, Jeollanam-do, in August 2020, using the difference between the resolution of topographic information and grid size. High-resolution topographic information (0.03 m) was established through photogrammetry. For comparison, the low-resolution topographic information was obtained from the contour lines of the 1:5000 digital map. The topographic information was depicted as a grid, with resolutions of 1, 5, and 10 m, and analyzed by setting the simulation grid size to 1, 5, and 10 m. According to the topographic resolution, no significant difference was obtained in the numerical simulation results, when high-resolution topographic information from UAV photogrammetry was used, and the analysis was similar to the actual debris flow. Additionally, when the size of the analysis grid for the simulation was 10 m, the simulation was very similar to the actual debris-flow situation. For predicting a risk area using a debris-flow model, it is very important to reflect actual information, such as topography, geology, and rainfall; technical parameters, such as the grid size, are also important. Moreover, determining the optimal grid size by considering the conditions of the study area, such as the basin area, is necessary.","PeriodicalId":416980,"journal":{"name":"Journal of the Korean Society of Hazard Mitigation","volume":"16 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120960723","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 : 2023-04-30DOI: 10.9798/kosham.2023.23.2.15
Ah Hyeon Dong, J. Kang
Since the first confirmed case, COVID-19 has spread rapidly in Korea. Furthermore, as social distancing has been implemented per quarantine guidelines, the virus has had various social and economic effects. Previous studies assess the resilience of the local community to measure the degree of economic damage caused by COVID-19 and to evaluate the ability of the community to return to a pre-pandemic state. To determine spatial characteristics and factors influencing resilience, the current study investigates the effects of COVID-19 on unemployment within the four-stage spread period of the outbreak. Differences were observed in regional resilience at each stage and location and the characteristics of resilience also differed temporally. Based on the results, the spatial change trend of resilience and factors affecting resilience from short- and long-term perspectives after the impact and suggest implications for future policies were derived.
{"title":"Measurement of Regional Resilience and Influencing Factors in Spread Stage of COVID-19 Using Unemployment Benefit Payment","authors":"Ah Hyeon Dong, J. Kang","doi":"10.9798/kosham.2023.23.2.15","DOIUrl":"https://doi.org/10.9798/kosham.2023.23.2.15","url":null,"abstract":"Since the first confirmed case, COVID-19 has spread rapidly in Korea. Furthermore, as social distancing has been implemented per quarantine guidelines, the virus has had various social and economic effects. Previous studies assess the resilience of the local community to measure the degree of economic damage caused by COVID-19 and to evaluate the ability of the community to return to a pre-pandemic state. To determine spatial characteristics and factors influencing resilience, the current study investigates the effects of COVID-19 on unemployment within the four-stage spread period of the outbreak. Differences were observed in regional resilience at each stage and location and the characteristics of resilience also differed temporally. Based on the results, the spatial change trend of resilience and factors affecting resilience from short- and long-term perspectives after the impact and suggest implications for future policies were derived.","PeriodicalId":416980,"journal":{"name":"Journal of the Korean Society of Hazard Mitigation","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127628709","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 : 2023-04-30DOI: 10.9798/kosham.2023.23.2.61
Yunju Choi, Yunseong Kim, Seung-Hyun Jin, Inhyuk Koo, Young-Phil Kwon
In 2017, a fire at the Jecheon Sports Center resulted in approximately 80 casualties. Interestingly, the extent of fire damage on the second and third floors differed from the general type of fire damage. The white papers and reports of the Jecheon Fire Department indicated that the primary spread path of the fire was a freight elevator. However, analysis of the damage caused, CCTV footage, and victim testimonies suggested that the freight elevator may not have been the primary fire spread path on the second and third floors. Therefore, further investigation was needed to identify the cause of the fire. In this study, fire simulations were conducted using a Fire Dynamics Simulator (FDS) and compared with actual fire cases, which enabled us to predict the fire spread path accurately. It was found that the main stairway was more likely to have been the main fire spread path than the freight elevator.
{"title":"Predicting the Fire Spread Path in Jecheon Sports Center Using a Fire Dynamics Simulator (FDS)","authors":"Yunju Choi, Yunseong Kim, Seung-Hyun Jin, Inhyuk Koo, Young-Phil Kwon","doi":"10.9798/kosham.2023.23.2.61","DOIUrl":"https://doi.org/10.9798/kosham.2023.23.2.61","url":null,"abstract":"In 2017, a fire at the Jecheon Sports Center resulted in approximately 80 casualties. Interestingly, the extent of fire damage on the second and third floors differed from the general type of fire damage. The white papers and reports of the Jecheon Fire Department indicated that the primary spread path of the fire was a freight elevator. However, analysis of the damage caused, CCTV footage, and victim testimonies suggested that the freight elevator may not have been the primary fire spread path on the second and third floors. Therefore, further investigation was needed to identify the cause of the fire. In this study, fire simulations were conducted using a Fire Dynamics Simulator (FDS) and compared with actual fire cases, which enabled us to predict the fire spread path accurately. It was found that the main stairway was more likely to have been the main fire spread path than the freight elevator.","PeriodicalId":416980,"journal":{"name":"Journal of the Korean Society of Hazard Mitigation","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122797575","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 : 2023-04-30DOI: 10.9798/kosham.2023.23.2.129
C. Lee, Seong-Chan An, Woo-chul Kang, Jae-Eun Lim
In Korea, levees are the fundamental countermeasure for floods caused by torrential rain in summer. In levee construction, loam is recommended instead of bed sediments because of problems like soil piping. A levee constructed with bed sediment requires the installation of a water barrier or an impervious core whereas the difficulty in procuring and transporting loam to the construction site creates an economic issue. Therefore, the purpose of this study was to verify the effectiveness of installing a barrier wall made of a polypropylene compound inside a levee. The wall helps increase the stability of the levee using bed sediments and can make levee construction economically feasible. When the water barrier was installed, a relatively slow increase in the water level was observed, and the behavior of the infiltrating line was also suppressed. In addition, there was no degradation or destruction till the end of the experiment. From these results, it is expected that the installation of the composite polypropylene water barrier will improve the stability of the embankment without the need to add quality soil.
{"title":"Validation Experiment on Internal Barrier Wall Made of Polypropylene Compound in Levee","authors":"C. Lee, Seong-Chan An, Woo-chul Kang, Jae-Eun Lim","doi":"10.9798/kosham.2023.23.2.129","DOIUrl":"https://doi.org/10.9798/kosham.2023.23.2.129","url":null,"abstract":"In Korea, levees are the fundamental countermeasure for floods caused by torrential rain in summer. In levee construction, loam is recommended instead of bed sediments because of problems like soil piping. A levee constructed with bed sediment requires the installation of a water barrier or an impervious core whereas the difficulty in procuring and transporting loam to the construction site creates an economic issue. Therefore, the purpose of this study was to verify the effectiveness of installing a barrier wall made of a polypropylene compound inside a levee. The wall helps increase the stability of the levee using bed sediments and can make levee construction economically feasible. When the water barrier was installed, a relatively slow increase in the water level was observed, and the behavior of the infiltrating line was also suppressed. In addition, there was no degradation or destruction till the end of the experiment. From these results, it is expected that the installation of the composite polypropylene water barrier will improve the stability of the embankment without the need to add quality soil.","PeriodicalId":416980,"journal":{"name":"Journal of the Korean Society of Hazard Mitigation","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127815336","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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