The platform door system is arranged along the edge of the platform, completely isolating the platform area from the tunnel track area, with a continuous barrier corresponding to the train door, which can be opened and closed by multi-level control of the sliding door, reducing the exchange of hot and cold airflow between the platform area and the track area, reducing the load of the station cooling system, and reducing the air conditioning energy consumption of the environmental control system; the normal pull in and departure of trains and the subway platform door system are closely linked. In this paper, typical faults of the platform door system are analyzed; the platform door body must be insulated in order to effectively reduce the risk of electric shock to passengers since subway riders may come into contact with it or the platform door when getting on and off the train. This paper first analyzes the basic principles of the platform door system door body insulation setting, then elaborates on the platform door system insulation problem for analysis, then introduces the corresponding solutions for the related problems, and finally specifies the platform door body insulation program.
{"title":"Exploring the typical fault analysis of platform door system of electromechanical equipment in urban rail transit and insulation maintenance","authors":"Ge Hu, W. Feng, Yuiing Fan, X. Lv, Yijun Wang","doi":"10.1117/12.2658362","DOIUrl":"https://doi.org/10.1117/12.2658362","url":null,"abstract":"The platform door system is arranged along the edge of the platform, completely isolating the platform area from the tunnel track area, with a continuous barrier corresponding to the train door, which can be opened and closed by multi-level control of the sliding door, reducing the exchange of hot and cold airflow between the platform area and the track area, reducing the load of the station cooling system, and reducing the air conditioning energy consumption of the environmental control system; the normal pull in and departure of trains and the subway platform door system are closely linked. In this paper, typical faults of the platform door system are analyzed; the platform door body must be insulated in order to effectively reduce the risk of electric shock to passengers since subway riders may come into contact with it or the platform door when getting on and off the train. This paper first analyzes the basic principles of the platform door system door body insulation setting, then elaborates on the platform door system insulation problem for analysis, then introduces the corresponding solutions for the related problems, and finally specifies the platform door body insulation program.","PeriodicalId":212840,"journal":{"name":"Conference on Smart Transportation and City Engineering","volume":"117 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":"124144414","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}
The defect of underground drainage pipes is the main inducing factor of urban disasters. However, existing detection robot has problems such as poor environmental adaptability and a low degree of automation for pipes. The deep learning-based amphibious robot designed in this study is a highly adaptable and efficient detection system. The designed ducted screw propelled wheels first provide power. Next, based on the multimodal sensors and the improved YOLOV4-Tiny, defect detection and 3D reconstruction are carried out. Finally, the defect location and image information are transmitted to the terminal for display by wire, and a detection report is generated. What’s more, the experimental results show that the MAP of the improved YOLOV4-Tiny in this research is improved by 2.18% compared with the baseline network, and the FPS is improved by 11.3 frames. The system proposed provides a new approach to drainage pipe inspection.
{"title":"Amphibious detection system for drainage pipes base on deep learning","authors":"Pengfei Yong","doi":"10.1117/12.2658645","DOIUrl":"https://doi.org/10.1117/12.2658645","url":null,"abstract":"The defect of underground drainage pipes is the main inducing factor of urban disasters. However, existing detection robot has problems such as poor environmental adaptability and a low degree of automation for pipes. The deep learning-based amphibious robot designed in this study is a highly adaptable and efficient detection system. The designed ducted screw propelled wheels first provide power. Next, based on the multimodal sensors and the improved YOLOV4-Tiny, defect detection and 3D reconstruction are carried out. Finally, the defect location and image information are transmitted to the terminal for display by wire, and a detection report is generated. What’s more, the experimental results show that the MAP of the improved YOLOV4-Tiny in this research is improved by 2.18% compared with the baseline network, and the FPS is improved by 11.3 frames. The system proposed provides a new approach to drainage pipe inspection.","PeriodicalId":212840,"journal":{"name":"Conference on Smart Transportation and City Engineering","volume":"18 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":"125740164","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}
Xuzhi Liang, Yunjin Wang, B. Liu, Haifeng Zhang, Jie Wu, Zhoucong Xu, Liu He
In order to solve the problem of the long repair time of bridge expansion joints that may result in long road closure periods and reduced vehicle traffic efficiency, a rapid-curing cement-based mortar material was prepared in this paper on the basis of special cement material through the adjustment of formulation and mineral admixture. The optimum mortar mix proportion obtained through research is as follows: cement-sand ratio is 1:1.1, water reducer is 0.2%, and the ratio of silica fume, mineral powder, and fly ash to cement is 6%, 2%, and 2% respectively. The 2h flexural strength and 2h compressive strength of the material obtained with the optimum formula reached 7 MPa and 24 Mpa respectively. Moreover, it has good fluidity and setting time properties without an obvious decrease in long-term strength, so it is an ideal rapid repair material for bridge expansion joints.
{"title":"Research on the preparation of rapid repair materials for bridge expansion joints","authors":"Xuzhi Liang, Yunjin Wang, B. Liu, Haifeng Zhang, Jie Wu, Zhoucong Xu, Liu He","doi":"10.1117/12.2658613","DOIUrl":"https://doi.org/10.1117/12.2658613","url":null,"abstract":"In order to solve the problem of the long repair time of bridge expansion joints that may result in long road closure periods and reduced vehicle traffic efficiency, a rapid-curing cement-based mortar material was prepared in this paper on the basis of special cement material through the adjustment of formulation and mineral admixture. The optimum mortar mix proportion obtained through research is as follows: cement-sand ratio is 1:1.1, water reducer is 0.2%, and the ratio of silica fume, mineral powder, and fly ash to cement is 6%, 2%, and 2% respectively. The 2h flexural strength and 2h compressive strength of the material obtained with the optimum formula reached 7 MPa and 24 Mpa respectively. Moreover, it has good fluidity and setting time properties without an obvious decrease in long-term strength, so it is an ideal rapid repair material for bridge expansion joints.","PeriodicalId":212840,"journal":{"name":"Conference on Smart Transportation and City Engineering","volume":"229 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":"134057685","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 addition to the great prospects for development, unmanned distribution has attracted a great deal of social attention as a new type of logistics distribution mode. The use of electric unmanned vehicles for urban logistics distribution can not only reduce enterprise costs but also achieve non-contact distribution and rapid logistics response for unmanned logistics distribution in multiple distribution centers. A multi-distribution center urban unmanned logistics distribution path optimization model is developed for minimizing total cost, taking into account constraints such as battery capacity of electric unmanned vehicles, customer time windows, simultaneous pickup and delivery, and vehicle balance between distribution centers. In this study, an improved genetic algorithm was designed with a reasonable route optimization strategy, and its effectiveness was verified through a variety of calculation examples. Our model was compared with other variant models and parameters. As a result of the analysis, it can be seen that the established model and algorithm can improve the vehicle path and save the distribution costs. This research can promote the development of urban unmanned logistics distribution mode and provide theoretical reference.
{"title":"Optimization of urban unmanned logistics distribution path with multiple distribution centers","authors":"Xiyu Tong, Jue-liang Hu, Shuguang Han, Diwei Zhou","doi":"10.1117/12.2658619","DOIUrl":"https://doi.org/10.1117/12.2658619","url":null,"abstract":"In addition to the great prospects for development, unmanned distribution has attracted a great deal of social attention as a new type of logistics distribution mode. The use of electric unmanned vehicles for urban logistics distribution can not only reduce enterprise costs but also achieve non-contact distribution and rapid logistics response for unmanned logistics distribution in multiple distribution centers. A multi-distribution center urban unmanned logistics distribution path optimization model is developed for minimizing total cost, taking into account constraints such as battery capacity of electric unmanned vehicles, customer time windows, simultaneous pickup and delivery, and vehicle balance between distribution centers. In this study, an improved genetic algorithm was designed with a reasonable route optimization strategy, and its effectiveness was verified through a variety of calculation examples. Our model was compared with other variant models and parameters. As a result of the analysis, it can be seen that the established model and algorithm can improve the vehicle path and save the distribution costs. This research can promote the development of urban unmanned logistics distribution mode and provide theoretical reference.","PeriodicalId":212840,"journal":{"name":"Conference on Smart Transportation and City Engineering","volume":"41 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":"130922317","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}
Quanlei Wang, Zhoucong Xu, Jie Wu, Fei Chen, You Zhou, Haifeng Zhang
With the ever-increasing highway transport volume and the transportation development towards the heavy-duty direction, pavement rutting, which has become one of the main highway pavement diseases, is increasingly serious and generates a strong impact the traffic safety. The main method currently used to handle pavement rutting is pavement overlay by means of pavement milling and repaving. When this method is used, however, the road needs to be closed to traffic, accompanied by complex construction technologies and a high engineering cost. How to enhance the rutting resistance of asphalt concrete and reduce the later-stage curing cost is a great difficulty faced by asphalt pavement engineering technicians at present. In this study, a high-ash composite modified rock asphalt mixture was prepared and evaluated, followed by the rutting test, immersion Marshall test, freeze-thaw splitting test, and low-temperature bending test. The results showed that the composite modification of common asphalt using natural Buton Rock Asphalt (BRA) could effectively improve the high-temperature performance, low-temperature performance, and resistance to water damage of pavements, especially showing evident advantages in rutting resistance.
{"title":"Research on the pavement performance of high-ash composite modified rock asphalt mixture","authors":"Quanlei Wang, Zhoucong Xu, Jie Wu, Fei Chen, You Zhou, Haifeng Zhang","doi":"10.1117/12.2658690","DOIUrl":"https://doi.org/10.1117/12.2658690","url":null,"abstract":"With the ever-increasing highway transport volume and the transportation development towards the heavy-duty direction, pavement rutting, which has become one of the main highway pavement diseases, is increasingly serious and generates a strong impact the traffic safety. The main method currently used to handle pavement rutting is pavement overlay by means of pavement milling and repaving. When this method is used, however, the road needs to be closed to traffic, accompanied by complex construction technologies and a high engineering cost. How to enhance the rutting resistance of asphalt concrete and reduce the later-stage curing cost is a great difficulty faced by asphalt pavement engineering technicians at present. In this study, a high-ash composite modified rock asphalt mixture was prepared and evaluated, followed by the rutting test, immersion Marshall test, freeze-thaw splitting test, and low-temperature bending test. The results showed that the composite modification of common asphalt using natural Buton Rock Asphalt (BRA) could effectively improve the high-temperature performance, low-temperature performance, and resistance to water damage of pavements, especially showing evident advantages in rutting resistance.","PeriodicalId":212840,"journal":{"name":"Conference on Smart Transportation and City Engineering","volume":"59 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":"133023859","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 order to effectively deal with emergencies and mitigate the possible consequences of various emergencies, this study uses the K-means clustering method to tackle the problems of the indeterminate number, location, and coverage of the existing emergency supplies preset points. Combined with the distribution of demand points, the size of demand, the distribution distance, the location of the reserve and other factors, the 165 demand points in Xuzhou are regionally divided, and the contour coefficient is used as the evaluation index to determine the optimal number of clusters of demand points. Then through python programming, a relocation model is constructed, and the demand weight and distance are used as influencing factors to traverse all demand points in different clustering areas, thereby determining the reserve of each clustering area. The research results can optimize the location of the reserve, reduce the rescue cost, and provide a reference for the location of the reserve for emergency supplies in China.
{"title":"Research on location selection of preset points for emergency supplies based on K-means clustering","authors":"Xu Wang, Shougeng Li","doi":"10.1117/12.2658403","DOIUrl":"https://doi.org/10.1117/12.2658403","url":null,"abstract":"In order to effectively deal with emergencies and mitigate the possible consequences of various emergencies, this study uses the K-means clustering method to tackle the problems of the indeterminate number, location, and coverage of the existing emergency supplies preset points. Combined with the distribution of demand points, the size of demand, the distribution distance, the location of the reserve and other factors, the 165 demand points in Xuzhou are regionally divided, and the contour coefficient is used as the evaluation index to determine the optimal number of clusters of demand points. Then through python programming, a relocation model is constructed, and the demand weight and distance are used as influencing factors to traverse all demand points in different clustering areas, thereby determining the reserve of each clustering area. The research results can optimize the location of the reserve, reduce the rescue cost, and provide a reference for the location of the reserve for emergency supplies in China.","PeriodicalId":212840,"journal":{"name":"Conference on Smart Transportation and City Engineering","volume":"59 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":"133656626","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}
Roof monitoring of running trains can effectively monitor the key components of the roof. In order to check the status of key components on the roof, it is necessary to check the roof surveillance video, which is often time-consuming and labor-intensive. In order to improve the efficiency of status inspection of key components, this paper proposes a key frame extraction algorithm for roof video surveillance based on saliency detection. The algorithm first designs a saliency detection network, which is used to extract candidate video frames containing key components. Then, through feature clustering analysis, the candidate video frames are classified into frame sequences containing components attached different classes, and finally the correlation is calculated for all frames in each frame sequence and the frame with the largest correlation corresponds to the key frame of the current frame sequence.
{"title":"Key frames extraction for train roof video based on saliency detection","authors":"Ao Liu","doi":"10.1117/12.2657907","DOIUrl":"https://doi.org/10.1117/12.2657907","url":null,"abstract":"Roof monitoring of running trains can effectively monitor the key components of the roof. In order to check the status of key components on the roof, it is necessary to check the roof surveillance video, which is often time-consuming and labor-intensive. In order to improve the efficiency of status inspection of key components, this paper proposes a key frame extraction algorithm for roof video surveillance based on saliency detection. The algorithm first designs a saliency detection network, which is used to extract candidate video frames containing key components. Then, through feature clustering analysis, the candidate video frames are classified into frame sequences containing components attached different classes, and finally the correlation is calculated for all frames in each frame sequence and the frame with the largest correlation corresponds to the key frame of the current frame sequence.","PeriodicalId":212840,"journal":{"name":"Conference on Smart Transportation and City Engineering","volume":"46 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":"131400748","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}
Asphalt pavement is the mostly used pavement type for city streets. Its conditions and performance are critical to ensure the adequate capacity and efficiency of city traffic. Since the Chinese asphalt binder specification is penetration-based grading system, which does not provide a clear correlation with environment condition, the selection of the binder for a paving project is primarily according to local construction experience. As the rapid expansion of the traffic volume in cities, previous experience could not meet the changing demand. Severe pavement distresses could be observed on streets at the time, which is much earlier than the designed pavement life, especially near city logistics transport centers. This paper presents a study on evaluation of low penetration asphalt binder from the perspective of pavement performance at high and low temperature. Four types of binder were collected. All of them were tested according to Chinese binder specification. Further, dynamic shear rheometer (DSR) and bending beam rheometer (BBR) were used to characterize the performance of binder at high and low temperature range respectively. Rutting resistance of HMA manufactured with four types of binder were evaluated using wheels load tester at both 60℃ and 70℃. The thermal crack resistance of HMA were also evaluated and the thermal stress restrained specimen test (TSRST) were used to capture the cracking temperature. The results show that, the low penetration asphalt binder possesses the better high temperature performance, meanwhile their low temperature performance satisfies the pavement requirements in southern cities of China.
{"title":"Pavement performance evaluation of low penetration asphalt binder in southern cities","authors":"Songtao Wei","doi":"10.1117/12.2658734","DOIUrl":"https://doi.org/10.1117/12.2658734","url":null,"abstract":"Asphalt pavement is the mostly used pavement type for city streets. Its conditions and performance are critical to ensure the adequate capacity and efficiency of city traffic. Since the Chinese asphalt binder specification is penetration-based grading system, which does not provide a clear correlation with environment condition, the selection of the binder for a paving project is primarily according to local construction experience. As the rapid expansion of the traffic volume in cities, previous experience could not meet the changing demand. Severe pavement distresses could be observed on streets at the time, which is much earlier than the designed pavement life, especially near city logistics transport centers. This paper presents a study on evaluation of low penetration asphalt binder from the perspective of pavement performance at high and low temperature. Four types of binder were collected. All of them were tested according to Chinese binder specification. Further, dynamic shear rheometer (DSR) and bending beam rheometer (BBR) were used to characterize the performance of binder at high and low temperature range respectively. Rutting resistance of HMA manufactured with four types of binder were evaluated using wheels load tester at both 60℃ and 70℃. The thermal crack resistance of HMA were also evaluated and the thermal stress restrained specimen test (TSRST) were used to capture the cracking temperature. The results show that, the low penetration asphalt binder possesses the better high temperature performance, meanwhile their low temperature performance satisfies the pavement requirements in southern cities of China.","PeriodicalId":212840,"journal":{"name":"Conference on Smart Transportation and City Engineering","volume":"128 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":"114538993","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}
Dongliang Geng, Kuiyuan Guo, Y. Zheng, Zhiqiang Zhang, Hongfei Li
In the process of intelligent driving simulation test, the vehicle dynamics model has a certain impact on the simulation results. In order to study how to calibrate the parameters of vehicle dynamics model based on intelligent driving simulation test, the vehicle dynamics model is built based on Carmaker dynamics software platform and real vehicle data. Select the typical test conditions, one is the test conditions for the longitudinal characteristics of the vehicle; The other is the test condition for vehicle lateral characteristics. Through the benchmarking analysis between the simulation analysis results and the field test results of the real vehicle, we can evaluate whether the longitudinal and transverse performance of the built dynamic model meets the requirements of intelligent driving simulation.
{"title":"Research on vehicle dynamics based on intelligent driving simulation test","authors":"Dongliang Geng, Kuiyuan Guo, Y. Zheng, Zhiqiang Zhang, Hongfei Li","doi":"10.1117/12.2657909","DOIUrl":"https://doi.org/10.1117/12.2657909","url":null,"abstract":"In the process of intelligent driving simulation test, the vehicle dynamics model has a certain impact on the simulation results. In order to study how to calibrate the parameters of vehicle dynamics model based on intelligent driving simulation test, the vehicle dynamics model is built based on Carmaker dynamics software platform and real vehicle data. Select the typical test conditions, one is the test conditions for the longitudinal characteristics of the vehicle; The other is the test condition for vehicle lateral characteristics. Through the benchmarking analysis between the simulation analysis results and the field test results of the real vehicle, we can evaluate whether the longitudinal and transverse performance of the built dynamic model meets the requirements of intelligent driving simulation.","PeriodicalId":212840,"journal":{"name":"Conference on Smart Transportation and City Engineering","volume":"12 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":"128384962","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}
Taking the subgrade width of high-speed railway as the research background, the indoor model test with geometric similarity ratio of 1:10 was established to simulate the working condition of high-speed railway subgrade width with or without geogrid in loess area, and the stress characteristics and settlement deformation law of subgrade width structure under two working conditions were studied. The test results show that the internal vertical stress of the widening subgrade increases with the increase of load, and decreases with the depth of subgrade. The maximum settlement occurs at the junction of existing and new subgrade, which leads to uneven settlement of existing new subgrade. After the geogrid is set inside the new subgrade, the vertical stress and subgrade settlement inside the subgrade are significantly reduced, and the uneven settlement of the subgrade is slowed down.
{"title":"Experimental study on the model of wide load transfer and settlement characteristics of high-speed railway subgrade","authors":"Pan Liu, Wen-jun Zhao, Yan Huang","doi":"10.1117/12.2657881","DOIUrl":"https://doi.org/10.1117/12.2657881","url":null,"abstract":"Taking the subgrade width of high-speed railway as the research background, the indoor model test with geometric similarity ratio of 1:10 was established to simulate the working condition of high-speed railway subgrade width with or without geogrid in loess area, and the stress characteristics and settlement deformation law of subgrade width structure under two working conditions were studied. The test results show that the internal vertical stress of the widening subgrade increases with the increase of load, and decreases with the depth of subgrade. The maximum settlement occurs at the junction of existing and new subgrade, which leads to uneven settlement of existing new subgrade. After the geogrid is set inside the new subgrade, the vertical stress and subgrade settlement inside the subgrade are significantly reduced, and the uneven settlement of the subgrade is slowed down.","PeriodicalId":212840,"journal":{"name":"Conference on Smart Transportation and City Engineering","volume":"87 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":"130596225","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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