Since 2015, the China Geological Survey has implemented a major program of ＂Geology Survey of Land Energy Mineral Resources＂. Till now, a total of billions of RMB have been invested and seven engineering projects ha...Since 2015, the China Geological Survey has implemented a major program of ＂Geology Survey of Land Energy Mineral Resources＂. Till now, a total of billions of RMB have been invested and seven engineering projects have been established, all of which has greatly enhanced the geological survey and exploration of China＇s continental shale gas in an attempt to overcome the oil and gas shortage.展开更多
The safety of large structures requires adequate foundations, which implies a good knowledge of the geological and geotechnical conditions of the respective ground. In general, that is only possible through engineerin...The safety of large structures requires adequate foundations, which implies a good knowledge of the geological and geotechnical conditions of the respective ground. In general, that is only possible through engineering geological studies which include proper site investigation techniques, adapted to the nature of the ground (rock mass or soil) and to the associated engineering problems. The paper illustrates the studies carried out for the design of the foundations of Ribeiradio 76 m high concrete gravity dam in a difficult rock mass and of Vasco da Gama Bridge, 13 km long, crossing the Tagus River in Lisbon, Portugal, through piles 75 m deep.展开更多
China's resource allocation is relatively extensive, the geological engineering committee internal regional relief there is a big difference, the geological research directly affects the technical research, the ge...China's resource allocation is relatively extensive, the geological engineering committee internal regional relief there is a big difference, the geological research directly affects the technical research, the geological research is conducive to the construction of facilities to provide more geological data support. Therefore, we analyze the meteorological disasters of the Geological Engineering Committee and emphasize the appropriate measures to reduce the impact of meteorological disasters on the quality of engineering construction.展开更多
The quality of geological survey work has a direct impact on the safety factor and quality of the project, which requires the corresponding staff to be able to make clear the key points and key points of engineering g...The quality of geological survey work has a direct impact on the safety factor and quality of the project, which requires the corresponding staff to be able to make clear the key points and key points of engineering geological survey work. In the exploration of engineering geological survey, we should start from the outline of engineering geological survey, find the practice process of relevant work, and according to the actual situation of the current work, deeply analyze and discuss the problems existing in engineering geological survey, and then put forward effective solutions, so as to improve the accuracy and reliability of engineering geological survey. Do a good job of the relevant details and survey quality control measures.展开更多
0 INTRODUCTION Geohazards in mountainous regions pose significant risks to the construction and safe operation of transportation,water conservancy,and other critical infrastructure projects.Engineering geological inve...0 INTRODUCTION Geohazards in mountainous regions pose significant risks to the construction and safe operation of transportation,water conservancy,and other critical infrastructure projects.Engineering geological investigations are crucial for disaster prevention and mitigation.展开更多
Geological Hazards Investigation and Evaluation is the core course of Environmental Geological Engineering,aiming to cultivate skilled talents with solid theoretical knowledge and excellent practical skills.At present...Geological Hazards Investigation and Evaluation is the core course of Environmental Geological Engineering,aiming to cultivate skilled talents with solid theoretical knowledge and excellent practical skills.At present,the course faces several issues,including a teaching environment disconnected from real-world work scenarios,course content that deviates from job-related tasks,a lack of digital teaching resources,and reliance on a single teaching method,leading to students’poor feedback from employers.Based on the concept of outcome-based education,the course team of Geological Hazards Investigation and Evaluation establishes a“five-step double-rotation”blended teaching model with the help of a Small Private Online Course platform.The program is designed to improve the teaching environment and expand the digitalized teaching resources in order to improve students’learning motivation,enhance learning effectiveness,and cultivate skillful talents who meet employers’satisfaction.展开更多
Geological disasters occurred frequently in recent years, people to improve the recognition of geological prospecting work, the hydrogeologic investigation is part of the more important content, do a good job in this ...Geological disasters occurred frequently in recent years, people to improve the recognition of geological prospecting work, the hydrogeologic investigation is part of the more important content, do a good job in this part of the work is helpful to better understand the geological environment condition, on this basis, make effective prevention measures, reduce geological disasters, and to some degree of geological disaster prevention. Therefore, this paper first analyzes the essence of hydrogeological survey, and then discusses its specific application in environmental geological exploration.展开更多
Major in engineering geology exploration of geology, topography, geomorphology, hydrology, meteorology, earthquake, and so on and so forth to examine, survey and the result is the basis of the engineering construction...Major in engineering geology exploration of geology, topography, geomorphology, hydrology, meteorology, earthquake, and so on and so forth to examine, survey and the result is the basis of the engineering construction, the designers must understand the engineering geological investigation of the construction site conditions to select the appropriate construction technology and materials, finally to ensure the quality of project construction in line with the acceptance criteria, hydrogeology will have a certain influence on the survey results in engineering geological survey.展开更多
Machine learning is currently one of the research hotspots in the field of landslide prediction.To clarify and evaluate the differences in characteristics and prediction effects of different machine learning models,Co...Machine learning is currently one of the research hotspots in the field of landslide prediction.To clarify and evaluate the differences in characteristics and prediction effects of different machine learning models,Conghua District,which is the most prone to landslide disasters in Guangzhou,was selected for landslide susceptibility evaluation.The evaluation factors were selected by using correlation analysis and variance expansion factor method.Applying four machine learning methods namely Logistic Regression(LR),Random Forest(RF),Support Vector Machines(SVM),and Extreme Gradient Boosting(XGB),landslide models were constructed.Comparative analysis and evaluation of the model were conducted through statistical indices and receiver operating characteristic(ROC)curves.The results showed that LR,RF,SVM,and XGB models have good predictive performance for landslide susceptibility,with the area under curve(AUC)values of 0.752,0.965,0.996,and 0.998,respectively.XGB model had the highest predictive ability,followed by RF model,SVM model,and LR model.The frequency ratio(FR)accuracy of LR,RF,SVM,and XGB models was 0.775,0.842,0.759,and 0.822,respectively.RF and XGB models were superior to LR and SVM models,indicating that the integrated algorithm has better predictive ability than a single classification algorithm in regional landslide classification problems.展开更多
This paper presents a case study of the clogging of a slurry-shield tunnel-boring machine(TBM)experienced during tunnel operations in clay-rich argillaceous siltstones under the Ganjiang River,China.The clogging exper...This paper presents a case study of the clogging of a slurry-shield tunnel-boring machine(TBM)experienced during tunnel operations in clay-rich argillaceous siltstones under the Ganjiang River,China.The clogging experienced during tunneling was due to special geological conditions,which had a considerably negative impact on the slurry-shield TBM tunneling performance.In this case study,the effect of clogging on the slurry-shield TBM tunneling performance(e.g.,advance speed,thrust,torque,and penetration per revolution)was fully investigated.The potential for clogging during tunnel operations in argillaceous siltstone was estimated using an existing empirical classification chart.Many improvement measures have been proposed to mitigate the clogging potential of two slurry-shield TBMs during tunneling,such as the use of an optimum cutting wheel,a replacement cutting tool,improvements to the circulation flushing system and slurry properties,mixed support integrating slurry,and compressed air to support the excavation face.The mechanisms and potential causes of clogging are explained in detail,and the contributions of these mitigation measures to tunneling performance are discussed.By investigating the actual operational parameters of the slurry-shield TBMs,these mitigation measures were proven to be effective in mitigating the clogging potential of slurry-shield TBMs.This case study provides valuable information for slurry-shield TBMs involving tunneling in clay-rich sedimentary rocks.展开更多
Man-made strata occur throughout the world.Also locally called“fill”or“reclaimed land,”most man-made strata were formed by industrial activity.Some strata are inert,well consolidated and properly“engineered”for ...Man-made strata occur throughout the world.Also locally called“fill”or“reclaimed land,”most man-made strata were formed by industrial activity.Some strata are inert,well consolidated and properly“engineered”for their intended future use.Many other,however,are polluted,contaminated and potentially unstable owing to poor environmental management and monitoring.Such deposits are often stratigraphically complex and thus require site-specific geologic and geotechnical investigation to ensure ground stability and to avoid release of surface,subsurface and airborne pollutants.展开更多
Volume 1:By M.Ramakrishnan and R.Vaidyanadhan ISBN 978-81-85867-77-9 Volume 2:By R.Vaidyanadhan and M.Ramakrishnan Geological Society of India,Bangalore 2008,2 volumes,1026 pages India is a vast country;it is the worl...Volume 1:By M.Ramakrishnan and R.Vaidyanadhan ISBN 978-81-85867-77-9 Volume 2:By R.Vaidyanadhan and M.Ramakrishnan Geological Society of India,Bangalore 2008,2 volumes,1026 pages India is a vast country;it is the world’s second populous nation,with rich mineral and agricultural resources,and an important geopolitical and economic stand.The geology of India is thus significant for science,and geology in India cannot be ignored by educators and policy makers.Indeed,geologic investigations of India date back to the nineteenth century when the Geological Survey of India(the second oldest of its kind in the world)was founded in Calcutta in 1851.展开更多
文摘Since 2015, the China Geological Survey has implemented a major program of ＂Geology Survey of Land Energy Mineral Resources＂. Till now, a total of billions of RMB have been invested and seven engineering projects have been established, all of which has greatly enhanced the geological survey and exploration of China＇s continental shale gas in an attempt to overcome the oil and gas shortage.
文摘The safety of large structures requires adequate foundations, which implies a good knowledge of the geological and geotechnical conditions of the respective ground. In general, that is only possible through engineering geological studies which include proper site investigation techniques, adapted to the nature of the ground (rock mass or soil) and to the associated engineering problems. The paper illustrates the studies carried out for the design of the foundations of Ribeiradio 76 m high concrete gravity dam in a difficult rock mass and of Vasco da Gama Bridge, 13 km long, crossing the Tagus River in Lisbon, Portugal, through piles 75 m deep.
文摘China's resource allocation is relatively extensive, the geological engineering committee internal regional relief there is a big difference, the geological research directly affects the technical research, the geological research is conducive to the construction of facilities to provide more geological data support. Therefore, we analyze the meteorological disasters of the Geological Engineering Committee and emphasize the appropriate measures to reduce the impact of meteorological disasters on the quality of engineering construction.
文摘The quality of geological survey work has a direct impact on the safety factor and quality of the project, which requires the corresponding staff to be able to make clear the key points and key points of engineering geological survey work. In the exploration of engineering geological survey, we should start from the outline of engineering geological survey, find the practice process of relevant work, and according to the actual situation of the current work, deeply analyze and discuss the problems existing in engineering geological survey, and then put forward effective solutions, so as to improve the accuracy and reliability of engineering geological survey. Do a good job of the relevant details and survey quality control measures.
基金financially supported by the National Key R&D Program of China(No.2022YFC3080200)。
文摘0 INTRODUCTION Geohazards in mountainous regions pose significant risks to the construction and safe operation of transportation,water conservancy,and other critical infrastructure projects.Engineering geological investigations are crucial for disaster prevention and mitigation.
基金Scientific Research Fund of Hunan Provincial Education Department Excellent Youth Project(23B0953)Hunan Province Vocational College Education and Teaching Reform Research Project(ZJGB2022427)。
文摘Geological Hazards Investigation and Evaluation is the core course of Environmental Geological Engineering,aiming to cultivate skilled talents with solid theoretical knowledge and excellent practical skills.At present,the course faces several issues,including a teaching environment disconnected from real-world work scenarios,course content that deviates from job-related tasks,a lack of digital teaching resources,and reliance on a single teaching method,leading to students’poor feedback from employers.Based on the concept of outcome-based education,the course team of Geological Hazards Investigation and Evaluation establishes a“five-step double-rotation”blended teaching model with the help of a Small Private Online Course platform.The program is designed to improve the teaching environment and expand the digitalized teaching resources in order to improve students’learning motivation,enhance learning effectiveness,and cultivate skillful talents who meet employers’satisfaction.
文摘Geological disasters occurred frequently in recent years, people to improve the recognition of geological prospecting work, the hydrogeologic investigation is part of the more important content, do a good job in this part of the work is helpful to better understand the geological environment condition, on this basis, make effective prevention measures, reduce geological disasters, and to some degree of geological disaster prevention. Therefore, this paper first analyzes the essence of hydrogeological survey, and then discusses its specific application in environmental geological exploration.
文摘Major in engineering geology exploration of geology, topography, geomorphology, hydrology, meteorology, earthquake, and so on and so forth to examine, survey and the result is the basis of the engineering construction, the designers must understand the engineering geological investigation of the construction site conditions to select the appropriate construction technology and materials, finally to ensure the quality of project construction in line with the acceptance criteria, hydrogeology will have a certain influence on the survey results in engineering geological survey.
基金supported by the projects of the China Geological Survey(DD20221729,DD20190291)Zhuhai Urban Geological Survey(including informatization)(MZCD–2201–008).
文摘Machine learning is currently one of the research hotspots in the field of landslide prediction.To clarify and evaluate the differences in characteristics and prediction effects of different machine learning models,Conghua District,which is the most prone to landslide disasters in Guangzhou,was selected for landslide susceptibility evaluation.The evaluation factors were selected by using correlation analysis and variance expansion factor method.Applying four machine learning methods namely Logistic Regression(LR),Random Forest(RF),Support Vector Machines(SVM),and Extreme Gradient Boosting(XGB),landslide models were constructed.Comparative analysis and evaluation of the model were conducted through statistical indices and receiver operating characteristic(ROC)curves.The results showed that LR,RF,SVM,and XGB models have good predictive performance for landslide susceptibility,with the area under curve(AUC)values of 0.752,0.965,0.996,and 0.998,respectively.XGB model had the highest predictive ability,followed by RF model,SVM model,and LR model.The frequency ratio(FR)accuracy of LR,RF,SVM,and XGB models was 0.775,0.842,0.759,and 0.822,respectively.RF and XGB models were superior to LR and SVM models,indicating that the integrated algorithm has better predictive ability than a single classification algorithm in regional landslide classification problems.
基金gratefully acknowledge the support of funds from the National Natural Science Foundation of China(Grant Nos.52090084,52208400).
文摘This paper presents a case study of the clogging of a slurry-shield tunnel-boring machine(TBM)experienced during tunnel operations in clay-rich argillaceous siltstones under the Ganjiang River,China.The clogging experienced during tunneling was due to special geological conditions,which had a considerably negative impact on the slurry-shield TBM tunneling performance.In this case study,the effect of clogging on the slurry-shield TBM tunneling performance(e.g.,advance speed,thrust,torque,and penetration per revolution)was fully investigated.The potential for clogging during tunnel operations in argillaceous siltstone was estimated using an existing empirical classification chart.Many improvement measures have been proposed to mitigate the clogging potential of two slurry-shield TBMs during tunneling,such as the use of an optimum cutting wheel,a replacement cutting tool,improvements to the circulation flushing system and slurry properties,mixed support integrating slurry,and compressed air to support the excavation face.The mechanisms and potential causes of clogging are explained in detail,and the contributions of these mitigation measures to tunneling performance are discussed.By investigating the actual operational parameters of the slurry-shield TBMs,these mitigation measures were proven to be effective in mitigating the clogging potential of slurry-shield TBMs.This case study provides valuable information for slurry-shield TBMs involving tunneling in clay-rich sedimentary rocks.
文摘Man-made strata occur throughout the world.Also locally called“fill”or“reclaimed land,”most man-made strata were formed by industrial activity.Some strata are inert,well consolidated and properly“engineered”for their intended future use.Many other,however,are polluted,contaminated and potentially unstable owing to poor environmental management and monitoring.Such deposits are often stratigraphically complex and thus require site-specific geologic and geotechnical investigation to ensure ground stability and to avoid release of surface,subsurface and airborne pollutants.
文摘Volume 1:By M.Ramakrishnan and R.Vaidyanadhan ISBN 978-81-85867-77-9 Volume 2:By R.Vaidyanadhan and M.Ramakrishnan Geological Society of India,Bangalore 2008,2 volumes,1026 pages India is a vast country;it is the world’s second populous nation,with rich mineral and agricultural resources,and an important geopolitical and economic stand.The geology of India is thus significant for science,and geology in India cannot be ignored by educators and policy makers.Indeed,geologic investigations of India date back to the nineteenth century when the Geological Survey of India(the second oldest of its kind in the world)was founded in Calcutta in 1851.
