Bo Zhang, Y. Tian, Guanghui Shi, Sheng-Hung Chen, Songsong Huang, Qiang Liu, Qi Jia, Fei Wang
Based on a pipeline gallery project passed through a box culvert in Xi'an city, a finite element model was built to study the effect on reducing the influence of pipe jacking construction which MJS reinforcement combining horizontal and vertical piles was adopted. The result shows that MJS combined horizontal and vertical piles can reduce the influence of pipe jacking construction. The optimal effect of internal force, vertical displacement, horizontal displacement and surface settlement of the culvert after combined reinforcement were 17.58%, 17.18%, 42.44% and 67.26%, respectively. The actual surface settlement of four sections is compared with that of combined reinforcement in numerical simulation, and the accuracy of numerical simulation is verified. This proves that the MJS construction method plays an important role in protecting existing structures in the undercrossing project.
{"title":"Analysis of the effect of MJS reinforcement methods on reducing the influence of pipe jacking construction","authors":"Bo Zhang, Y. Tian, Guanghui Shi, Sheng-Hung Chen, Songsong Huang, Qiang Liu, Qi Jia, Fei Wang","doi":"10.1117/12.2658647","DOIUrl":"https://doi.org/10.1117/12.2658647","url":null,"abstract":"Based on a pipeline gallery project passed through a box culvert in Xi'an city, a finite element model was built to study the effect on reducing the influence of pipe jacking construction which MJS reinforcement combining horizontal and vertical piles was adopted. The result shows that MJS combined horizontal and vertical piles can reduce the influence of pipe jacking construction. The optimal effect of internal force, vertical displacement, horizontal displacement and surface settlement of the culvert after combined reinforcement were 17.58%, 17.18%, 42.44% and 67.26%, respectively. The actual surface settlement of four sections is compared with that of combined reinforcement in numerical simulation, and the accuracy of numerical simulation is verified. This proves that the MJS construction method plays an important role in protecting existing structures in the undercrossing project.","PeriodicalId":212840,"journal":{"name":"Conference on Smart Transportation and City Engineering","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130709609","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}
Baomin Wang, Zhaoxing Li, Ningguo Qiao, Y. Liang, Qingyong Wang, Junsoo Che
As a typical complex system, the requirements of stakeholders such as market, customers and operating conditions have an important impact on the design EMUs. At present, the EMU manufacturers still adopt the idea of traditional system engineering to decompose the requirements, resulting in the lack of traceable links between requirements and design, which seriously prolongs the product development cycle and increases the development cost. Under this background, this paper introduces the idea of model-based systems engineering (MBSE) into the EMU requirements management. The method is vertically divided into four aspects: the L1 layer is customer requirements, the L2 layer is product requirements, the L3 layer is system requirements, and the L4 layer is component requirements; the horizontal activities are divided into five steps: requirements capture, requirements analysis, requirements confirmation, requirements allocation, and requirements verification. It is applied to the requirements management of EMUs air conditioning system, and the results show that the application of MBSE to EMUs requirements management can establish the traceability relationship between requirements and design, ensure the accuracy of requirements, improve the efficiency of requirements management, and realize the transformation of EMU requirements from “document based” to “model-based”.
{"title":"Practice and exploration of MBSE introducing into air conditioning system development requirements management for Emus","authors":"Baomin Wang, Zhaoxing Li, Ningguo Qiao, Y. Liang, Qingyong Wang, Junsoo Che","doi":"10.1117/12.2657863","DOIUrl":"https://doi.org/10.1117/12.2657863","url":null,"abstract":"As a typical complex system, the requirements of stakeholders such as market, customers and operating conditions have an important impact on the design EMUs. At present, the EMU manufacturers still adopt the idea of traditional system engineering to decompose the requirements, resulting in the lack of traceable links between requirements and design, which seriously prolongs the product development cycle and increases the development cost. Under this background, this paper introduces the idea of model-based systems engineering (MBSE) into the EMU requirements management. The method is vertically divided into four aspects: the L1 layer is customer requirements, the L2 layer is product requirements, the L3 layer is system requirements, and the L4 layer is component requirements; the horizontal activities are divided into five steps: requirements capture, requirements analysis, requirements confirmation, requirements allocation, and requirements verification. It is applied to the requirements management of EMUs air conditioning system, and the results show that the application of MBSE to EMUs requirements management can establish the traceability relationship between requirements and design, ensure the accuracy of requirements, improve the efficiency of requirements management, and realize the transformation of EMU requirements from “document based” to “model-based”.","PeriodicalId":212840,"journal":{"name":"Conference on Smart Transportation and City Engineering","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130580886","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}
Shen-you Song, Yaoyu Zhu, Wenliang Jin, Fengyong Xia, Bai-yong Fu
In recent years, with the continuous development of traffic engineering in China, many large-scale cluster projects across rivers and seas have been started and completed. As an important structural form of crossing water, immersed tunnel has been paid more and more attention. However, the joints between precast segments of immersed tunnel, especially the final joints of the closure section, are the key problems in the construction of immersed tunnel, where there are multi-directional needs such as permeability, safety, convenience and economy. The final joint technology in the construction of large immersed tunnel, such as Shenzhen-Zhongshan Link, is a controlling problem, and innovative technology is still needed. In this paper, five kinds of final joint structures and construction methods of immersed tunnel are investigated, and the characteristics of each joint are summarized and introduced. The final joint forms in the existing representative projects in China are also investigated and summarized. Finally, on the basis of the existing research, the problems that need to be paid attention to in the construction of the final joint of Shenzhen-Zhongshan Link are pointed out, which provides a reference for the construction of similar projects.
{"title":"Research and application of final joints of immersed tunnels","authors":"Shen-you Song, Yaoyu Zhu, Wenliang Jin, Fengyong Xia, Bai-yong Fu","doi":"10.1117/12.2658668","DOIUrl":"https://doi.org/10.1117/12.2658668","url":null,"abstract":"In recent years, with the continuous development of traffic engineering in China, many large-scale cluster projects across rivers and seas have been started and completed. As an important structural form of crossing water, immersed tunnel has been paid more and more attention. However, the joints between precast segments of immersed tunnel, especially the final joints of the closure section, are the key problems in the construction of immersed tunnel, where there are multi-directional needs such as permeability, safety, convenience and economy. The final joint technology in the construction of large immersed tunnel, such as Shenzhen-Zhongshan Link, is a controlling problem, and innovative technology is still needed. In this paper, five kinds of final joint structures and construction methods of immersed tunnel are investigated, and the characteristics of each joint are summarized and introduced. The final joint forms in the existing representative projects in China are also investigated and summarized. Finally, on the basis of the existing research, the problems that need to be paid attention to in the construction of the final joint of Shenzhen-Zhongshan Link are pointed out, which provides a reference for the construction of similar projects.","PeriodicalId":212840,"journal":{"name":"Conference on Smart Transportation and City Engineering","volume":"159 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132550681","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}
Pedestrians are the most important vulnerable road traffic participant. According to the traffic accident survey, pedestrian fatalities exceed 30% of total fatalities. Among the accident scenarios of car to pedestrian, car to pedestrian crossing and car to pedestrian longitudinal are the most frequent. Research shows that the accident rate is higher at nighttime than daytime. In this paper, based on the characteristics of road traffic accidents in China and combined with the nighttime illumination characteristics of Chinese roads, we focused on the study of automatic emergency braking (AEB) system for pedestrian nighttime test and evaluation scenarios, and carried out the validation of test methods and test techniques.
{"title":"Research on test and evaluation of automatic emergency braking system for pedestrian night condition based on Chinese traffic characteristics","authors":"Qing Li, Bohang Liu, Shuai Zhang, Yang Liu","doi":"10.1117/12.2658217","DOIUrl":"https://doi.org/10.1117/12.2658217","url":null,"abstract":"Pedestrians are the most important vulnerable road traffic participant. According to the traffic accident survey, pedestrian fatalities exceed 30% of total fatalities. Among the accident scenarios of car to pedestrian, car to pedestrian crossing and car to pedestrian longitudinal are the most frequent. Research shows that the accident rate is higher at nighttime than daytime. In this paper, based on the characteristics of road traffic accidents in China and combined with the nighttime illumination characteristics of Chinese roads, we focused on the study of automatic emergency braking (AEB) system for pedestrian nighttime test and evaluation scenarios, and carried out the validation of test methods and test techniques.","PeriodicalId":212840,"journal":{"name":"Conference on Smart Transportation and City Engineering","volume":"234 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114364448","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}
Han Ke, Guangyin Xu, Chuntang Li, Jinghong Gao, Runkai Zhang
The accurate prediction of passenger turnover is an important foundation and one of main basis of passenger transportation organization. It is also an important guarantee for the transportation industry to face the market and grasp the future. This paper used the grey correlation prediction theory to construct the GM (1,1) model. Based on the historical data of China's passenger transport before 2020, this paper respectively predicts the turnover of China's railway passenger transport, highway passenger transport and aviation passenger transport in 2030. This study shows that the prediction accuracy of the model is relatively higher. Prediction values are also basically in line with the actual development of China’s passenger transport in the future. Under the background of carbon peak, the results predicted in this paper can provide reference for the adjustment of the current passenger transport structure, and have certain significance for the development of passenger transport.
{"title":"Turnover forecast of passenger transport structure in China based on grey correlation theory","authors":"Han Ke, Guangyin Xu, Chuntang Li, Jinghong Gao, Runkai Zhang","doi":"10.1117/12.2658153","DOIUrl":"https://doi.org/10.1117/12.2658153","url":null,"abstract":"The accurate prediction of passenger turnover is an important foundation and one of main basis of passenger transportation organization. It is also an important guarantee for the transportation industry to face the market and grasp the future. This paper used the grey correlation prediction theory to construct the GM (1,1) model. Based on the historical data of China's passenger transport before 2020, this paper respectively predicts the turnover of China's railway passenger transport, highway passenger transport and aviation passenger transport in 2030. This study shows that the prediction accuracy of the model is relatively higher. Prediction values are also basically in line with the actual development of China’s passenger transport in the future. Under the background of carbon peak, the results predicted in this paper can provide reference for the adjustment of the current passenger transport structure, and have certain significance for the development of passenger transport.","PeriodicalId":212840,"journal":{"name":"Conference on Smart Transportation and City Engineering","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114549116","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}
In the design of transmission lines, the selection of suitable wires is of great significance to the project. In this paper, finite element software ANSYS was used to establish finite element model of transmission tower, three towers and four-wire finite elements of ordinary steel core aluminum strand and carbon fiber composite core conductor, which calculates the displacement, axial force and bending moment of the transmission single tower, the ordinary steel core aluminum strand before the transformation and the carbon fiber composite core wire tower system after the transformation. The analysis results show that the top displacement of the tower, in the tower line coupling system of ACCC conductor, is about 48.9% higher than that of the transmission tower, and the axial force and bending moment of the bottom of the tower, are about 39.6% and 37.9% higher than that of the transmission single tower, which indicates that the coupling of the tower line needs to be considered when the ACCC wire is used for the transmission line. The maximum displacement of the tower top under the ACCC wire is reduced by about 62.7%, compared with the maximum displacement of the tower top under the action of the ACSR wire, and the maximum axial force and bending moment of the bottom of the tower are also reduced by about 64.2% and 64.7% , which explains that the carbon fiber composite core wire after the transformation has more superior performance than the ordinary steel core aluminum stranded wire used for transmission lines before the transformation.
{"title":"Dynamic response analysis of transmission single tower and tower line system","authors":"Xinmin Yu, Benzhao Fu, S. Li, Lili Men, J. Bai","doi":"10.1117/12.2658639","DOIUrl":"https://doi.org/10.1117/12.2658639","url":null,"abstract":"In the design of transmission lines, the selection of suitable wires is of great significance to the project. In this paper, finite element software ANSYS was used to establish finite element model of transmission tower, three towers and four-wire finite elements of ordinary steel core aluminum strand and carbon fiber composite core conductor, which calculates the displacement, axial force and bending moment of the transmission single tower, the ordinary steel core aluminum strand before the transformation and the carbon fiber composite core wire tower system after the transformation. The analysis results show that the top displacement of the tower, in the tower line coupling system of ACCC conductor, is about 48.9% higher than that of the transmission tower, and the axial force and bending moment of the bottom of the tower, are about 39.6% and 37.9% higher than that of the transmission single tower, which indicates that the coupling of the tower line needs to be considered when the ACCC wire is used for the transmission line. The maximum displacement of the tower top under the ACCC wire is reduced by about 62.7%, compared with the maximum displacement of the tower top under the action of the ACSR wire, and the maximum axial force and bending moment of the bottom of the tower are also reduced by about 64.2% and 64.7% , which explains that the carbon fiber composite core wire after the transformation has more superior performance than the ordinary steel core aluminum stranded wire used for transmission lines before the transformation.","PeriodicalId":212840,"journal":{"name":"Conference on Smart Transportation and City Engineering","volume":"133 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124275277","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}
Nowadays, the rise of various unexpected incidents on a global scale makes the management and control of emergency transportation popular research in the field of the transportation infrastructure network. The development of digital technologies has injected new impetus into emergency traffic management in recent years. Such advancement poses a significant impact on the efficiency of evacuation, resource dispatching, and supplies technical support for the construction of emergency transportation system. In this study, we review recent literature on digital emergency disposal technologies of the transportation infrastructure network, including geographic information system (GIS), Internet of things (IoT), cooperative vehicle infrastructure system (CVIS), big data technology, and intelligent transportation system (ITS), etc. It is found that digital technologies have unique advantages and application potential in the prevention, early warning, and rescue of unexpected accidents than traditional emergency transportation management. Finally, we summarize the characteristics of the current effort and propose future research directions.
{"title":"Digital emergency response technologies research of transportation infrastructure network: a review and prospects","authors":"Zhu Jiang, Xin Fu","doi":"10.1117/12.2658269","DOIUrl":"https://doi.org/10.1117/12.2658269","url":null,"abstract":"Nowadays, the rise of various unexpected incidents on a global scale makes the management and control of emergency transportation popular research in the field of the transportation infrastructure network. The development of digital technologies has injected new impetus into emergency traffic management in recent years. Such advancement poses a significant impact on the efficiency of evacuation, resource dispatching, and supplies technical support for the construction of emergency transportation system. In this study, we review recent literature on digital emergency disposal technologies of the transportation infrastructure network, including geographic information system (GIS), Internet of things (IoT), cooperative vehicle infrastructure system (CVIS), big data technology, and intelligent transportation system (ITS), etc. It is found that digital technologies have unique advantages and application potential in the prevention, early warning, and rescue of unexpected accidents than traditional emergency transportation management. Finally, we summarize the characteristics of the current effort and propose future research directions.","PeriodicalId":212840,"journal":{"name":"Conference on Smart Transportation and City Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115281124","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}
With the continuous development of nuclear energy, the spent fuel produced by the decay of radionuclides also increases. How to ensure environmental safety through safe transportation management and effective disposal of spent fuel is a new social proposition that needs to be considered and discussed in environmental protection. Based on the Web of Science database, the bibliometric tool Histcite is used to carry out a systematic metrological analysis of the research on spent fuel transportation, compares the status and priorities of spent fuel transportation research at home and abroad, grasps the current research trends and hot issues, and analyzes the development status of spent fuel transportation safety based on trend analysis. The research results show that the research related to spent fuel transportation first started in 1972 and the number of documents is increasing; the M-K trend test analysis results also show that there are obvious mutations in the related research. The internationally influential units in the field of spent fuel transportation are mainly concentrated in European and American countries such as the United States and Sweden, and the quality of the literature is high, and they are in an international leading position. The whole process of transportation assessment and environmental risk simulation are the research hotspots in this field.
随着核能的不断发展，放射性核素衰变产生的乏燃料也在不断增加。如何通过安全运输管理和乏燃料的有效处置来确保环境安全，是环境保护中需要考虑和探讨的一个新的社会命题。基于Web of Science数据库，利用文献计量工具Histcite对乏燃料运输研究进行了系统的计量分析，比较了国内外乏燃料运输研究的现状和重点，掌握了当前的研究趋势和热点问题，并基于趋势分析分析了乏燃料运输安全的发展现状。研究结果表明:乏燃料运输相关研究始于1972年，文献数量不断增加;M-K趋势检验分析结果也显示相关研究存在明显的突变。在乏燃料运输领域具有国际影响力的单位主要集中在美国、瑞典等欧美国家，文献质量高，处于国际领先地位。运输全过程评价和环境风险模拟是该领域的研究热点。
{"title":"Research on transport safety of spent fuel based on trend analysis","authors":"Guobo Wang, Haiyang Dong, Jiezhe Geng","doi":"10.1117/12.2658686","DOIUrl":"https://doi.org/10.1117/12.2658686","url":null,"abstract":"With the continuous development of nuclear energy, the spent fuel produced by the decay of radionuclides also increases. How to ensure environmental safety through safe transportation management and effective disposal of spent fuel is a new social proposition that needs to be considered and discussed in environmental protection. Based on the Web of Science database, the bibliometric tool Histcite is used to carry out a systematic metrological analysis of the research on spent fuel transportation, compares the status and priorities of spent fuel transportation research at home and abroad, grasps the current research trends and hot issues, and analyzes the development status of spent fuel transportation safety based on trend analysis. The research results show that the research related to spent fuel transportation first started in 1972 and the number of documents is increasing; the M-K trend test analysis results also show that there are obvious mutations in the related research. The internationally influential units in the field of spent fuel transportation are mainly concentrated in European and American countries such as the United States and Sweden, and the quality of the literature is high, and they are in an international leading position. The whole process of transportation assessment and environmental risk simulation are the research hotspots in this field.","PeriodicalId":212840,"journal":{"name":"Conference on Smart Transportation and City Engineering","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116899136","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}
With the rapid development of information technology, the manufacturing industry is transforming to digitization and intelligence. The realization of real-time interaction and data fusion between physical factory and virtual factory is one of the bottlenecks to realize intelligence. To avoid this issue, it is necessary to design a dynamic monitoring system of prefabricated component production line based on digital twin technology. The system architecture includes physical layer, data layer, virtual layer and application layer, and the interconnection of all levels of the monitoring system is realized by using information technologies such as the Internet of Things, PLC and MES. Through data integration display and virtual factory display, the on-site comprehensive monitoring and intelligent simulation analysis of the production line can accurately locate the abnormal conditions in the production process, which can provide early warning and optimization decisions quickly. The results show that the system can monitor and predict the production line in real time, and has good practicability, which can provide a reference for the realization of dynamic monitoring of the production line.
{"title":"Dynamic monitoring system of prefabricated component production line based on digital twin","authors":"Xinyi Liu, Ren-Kai Jiang, Xinqiu Wei, Guo-qiang Zhang, Linqian Tian, Ling Wang, X. Zheng","doi":"10.1117/12.2658288","DOIUrl":"https://doi.org/10.1117/12.2658288","url":null,"abstract":"With the rapid development of information technology, the manufacturing industry is transforming to digitization and intelligence. The realization of real-time interaction and data fusion between physical factory and virtual factory is one of the bottlenecks to realize intelligence. To avoid this issue, it is necessary to design a dynamic monitoring system of prefabricated component production line based on digital twin technology. The system architecture includes physical layer, data layer, virtual layer and application layer, and the interconnection of all levels of the monitoring system is realized by using information technologies such as the Internet of Things, PLC and MES. Through data integration display and virtual factory display, the on-site comprehensive monitoring and intelligent simulation analysis of the production line can accurately locate the abnormal conditions in the production process, which can provide early warning and optimization decisions quickly. The results show that the system can monitor and predict the production line in real time, and has good practicability, which can provide a reference for the realization of dynamic monitoring of the production line.","PeriodicalId":212840,"journal":{"name":"Conference on Smart Transportation and City Engineering","volume":"126 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126606990","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}
Based on the Mohr-Coulomb strain softening model, the nonlinear CWFS criterion of friction strengthening and cohesion weakening is adopted, and the deterioration behavior of tensile strength and stiffness modulus caused by tensile-shear coupling yield of intact rock mass is considered. Through two different modeling methods, the influence of geometric characteristics of straight wall arch tunnel section on the failure of surrounding rock and rock-burst is simulated. The results show that the geometric characteristics of tunnel section have obvious influence on the stability of surrounding rock. The rise-span ratios are 0.5, 0.297 and 0.16, and the height of straight wall is 0.875 m. The plastic zone, rock-burst zone, tensile yield zone and shear strain localization zone of surrounding rock decrease with the decrease of rise-span ratio. When the rise-span ratios are 0.5, 0.297 and 0.16, and the vertical wall heights are 0.875 m, 1.23 m and 1.47 m, respectively, the plastic zone, rock-burst zone, tensile yield zone and shear strain localization zone of surrounding rock increase significantly with the decrease of rise-span ratio. When the rise-span ratio is 0.16 and the straight wall height H4 = 1.47 m, the maximum shear strain increment is about 10-2 , which is an order of magnitude higher than other schemes. According to Russense rock-burst criterion and shear strain localization results, the rock-burst units are mainly concentrated in the top and bottom of the tunnel section, which is consistent with the rock-burst position recorded in the field tunnel.
{"title":"Numerical simulation of influence of section geometry on surrounding rock stability of arch tunnel with straight wall","authors":"Biao Wang, Yang Wang, Zhenhua Zhang, Shuai Tao","doi":"10.1117/12.2657861","DOIUrl":"https://doi.org/10.1117/12.2657861","url":null,"abstract":"Based on the Mohr-Coulomb strain softening model, the nonlinear CWFS criterion of friction strengthening and cohesion weakening is adopted, and the deterioration behavior of tensile strength and stiffness modulus caused by tensile-shear coupling yield of intact rock mass is considered. Through two different modeling methods, the influence of geometric characteristics of straight wall arch tunnel section on the failure of surrounding rock and rock-burst is simulated. The results show that the geometric characteristics of tunnel section have obvious influence on the stability of surrounding rock. The rise-span ratios are 0.5, 0.297 and 0.16, and the height of straight wall is 0.875 m. The plastic zone, rock-burst zone, tensile yield zone and shear strain localization zone of surrounding rock decrease with the decrease of rise-span ratio. When the rise-span ratios are 0.5, 0.297 and 0.16, and the vertical wall heights are 0.875 m, 1.23 m and 1.47 m, respectively, the plastic zone, rock-burst zone, tensile yield zone and shear strain localization zone of surrounding rock increase significantly with the decrease of rise-span ratio. When the rise-span ratio is 0.16 and the straight wall height H4 = 1.47 m, the maximum shear strain increment is about 10-2 , which is an order of magnitude higher than other schemes. According to Russense rock-burst criterion and shear strain localization results, the rock-burst units are mainly concentrated in the top and bottom of the tunnel section, which is consistent with the rock-burst position recorded in the field tunnel.","PeriodicalId":212840,"journal":{"name":"Conference on Smart Transportation and City Engineering","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126748383","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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