The Experts below are selected from a list of 4071 Experts worldwide ranked by ideXlab platform
Guangquan Zhang - One of the best experts on this subject based on the ideXlab platform.
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wireline wireless networking remote monitoring technology for analysing the unloading deformation characteristics of the fractured Surrounding Rock Mass induced by underground excavation
Advances in Civil Engineering, 2019Co-Authors: Jianlong Sheng, Pengzhi Pan, Guangquan ZhangAbstract:Collapse or large deformation of fractured Surrounding Rock Mass occurs frequently in underground tunnelling and results in many casualties and extensive property damage. This paper proposed a new type of remote telemetry system for monitoring the mechanical responses of underground tunnels during unloading. This system adopted both wired and wireless networking schemes, including a signal collection and transmission subsystem, a management analysis subsystem, and a remote receiving subsystem, in the tunnels. The application of this new approach in a subway tunnel indicated that the complete unloading performance of a Surrounding Rock Mass can be captured in real time and high frequency using this method, recording the deformation of the Surrounding Rock, the stress in the bolts, and the stress in the shotcrete between the Surrounding Rock and steel arch. The in situ experimental study also found that deformation of the fractured Surrounding Rock Mass in the Dashizi Tunnel showed a step-like fluctuating growth pattern. Additionally, the mechanical response of the Surrounding Rock Mass during unloading tended to stabilize when the opening face was approximately 35 m away from the monitoring section, providing new ways to optimize the excavation process and support measure.
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“Wireline + Wireless” Networking Remote Monitoring Technology for Analysing the Unloading Deformation Characteristics of the Fractured Surrounding Rock Mass Induced by Underground Excavation
Advances in Civil Engineering, 2019Co-Authors: Jianlong Sheng, Pengzhi Pan, Guangquan ZhangAbstract:Collapse or large deformation of fractured Surrounding Rock Mass occurs frequently in underground tunnelling and results in many casualties and extensive property damage. This paper proposed a new type of remote telemetry system for monitoring the mechanical responses of underground tunnels during unloading. This system adopted both wired and wireless networking schemes, including a signal collection and transmission subsystem, a management analysis subsystem, and a remote receiving subsystem, in the tunnels. The application of this new approach in a subway tunnel indicated that the complete unloading performance of a Surrounding Rock Mass can be captured in real time and high frequency using this method, recording the deformation of the Surrounding Rock, the stress in the bolts, and the stress in the shotcrete between the Surrounding Rock and steel arch. The in situ experimental study also found that deformation of the fractured Surrounding Rock Mass in the Dashizi Tunnel showed a step-like fluctuating growth pattern. Additionally, the mechanical response of the Surrounding Rock Mass during unloading tended to stabilize when the opening face was approximately 35 m away from the monitoring section, providing new ways to optimize the excavation process and support measure.
Jianlong Sheng - One of the best experts on this subject based on the ideXlab platform.
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wireline wireless networking remote monitoring technology for analysing the unloading deformation characteristics of the fractured Surrounding Rock Mass induced by underground excavation
Advances in Civil Engineering, 2019Co-Authors: Jianlong Sheng, Pengzhi Pan, Guangquan ZhangAbstract:Collapse or large deformation of fractured Surrounding Rock Mass occurs frequently in underground tunnelling and results in many casualties and extensive property damage. This paper proposed a new type of remote telemetry system for monitoring the mechanical responses of underground tunnels during unloading. This system adopted both wired and wireless networking schemes, including a signal collection and transmission subsystem, a management analysis subsystem, and a remote receiving subsystem, in the tunnels. The application of this new approach in a subway tunnel indicated that the complete unloading performance of a Surrounding Rock Mass can be captured in real time and high frequency using this method, recording the deformation of the Surrounding Rock, the stress in the bolts, and the stress in the shotcrete between the Surrounding Rock and steel arch. The in situ experimental study also found that deformation of the fractured Surrounding Rock Mass in the Dashizi Tunnel showed a step-like fluctuating growth pattern. Additionally, the mechanical response of the Surrounding Rock Mass during unloading tended to stabilize when the opening face was approximately 35 m away from the monitoring section, providing new ways to optimize the excavation process and support measure.
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“Wireline + Wireless” Networking Remote Monitoring Technology for Analysing the Unloading Deformation Characteristics of the Fractured Surrounding Rock Mass Induced by Underground Excavation
Advances in Civil Engineering, 2019Co-Authors: Jianlong Sheng, Pengzhi Pan, Guangquan ZhangAbstract:Collapse or large deformation of fractured Surrounding Rock Mass occurs frequently in underground tunnelling and results in many casualties and extensive property damage. This paper proposed a new type of remote telemetry system for monitoring the mechanical responses of underground tunnels during unloading. This system adopted both wired and wireless networking schemes, including a signal collection and transmission subsystem, a management analysis subsystem, and a remote receiving subsystem, in the tunnels. The application of this new approach in a subway tunnel indicated that the complete unloading performance of a Surrounding Rock Mass can be captured in real time and high frequency using this method, recording the deformation of the Surrounding Rock, the stress in the bolts, and the stress in the shotcrete between the Surrounding Rock and steel arch. The in situ experimental study also found that deformation of the fractured Surrounding Rock Mass in the Dashizi Tunnel showed a step-like fluctuating growth pattern. Additionally, the mechanical response of the Surrounding Rock Mass during unloading tended to stabilize when the opening face was approximately 35 m away from the monitoring section, providing new ways to optimize the excavation process and support measure.
Xiaoyong Zhou - One of the best experts on this subject based on the ideXlab platform.
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Jointed Surrounding Rock Mass Stability Analysis on an Underground Cavern in a Hydropower Station Based on the Extended Key Block Theory
Energies, 2017Co-Authors: Chao Jia, Lian Mingyuan, Xiaoyong ZhouAbstract:The jointed Surrounding Rock Mass stability is of utmost importance to integral stability during the construction and long-term safety operation of the underground caverns in hydropower stations. The key blocks play a significant role in the integral stability of the jointed Surrounding Rock Mass, therefore it is critical to determine the location, size, and failure mode of random key blocks. This paper proposes an improved method combining the traditional key block theory (KBT) and the force transfer algorithm to accurately calculate the safety factors of probabilistic key blocks in the Surrounding Rock Mass. The force transfer algorithm can consider the interactions between the internal blocks. After the probabilistic characteristics of the joint fissures are obtained, the stereographic projection method is employed to determine the locations of dangerous joints. Then the vector analysis method is used to search the random blocks, determine the sliding directions of random blocks, and calculate the block sizes and safety factors near the free surface of the underground cavern, which can be used to comprehensively evaluate the Surrounding Rock Mass stability. The above numerical results have provided powerful guidance for developing a reinforcement system for the Surrounding Rock Mass.
Pengzhi Pan - One of the best experts on this subject based on the ideXlab platform.
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wireline wireless networking remote monitoring technology for analysing the unloading deformation characteristics of the fractured Surrounding Rock Mass induced by underground excavation
Advances in Civil Engineering, 2019Co-Authors: Jianlong Sheng, Pengzhi Pan, Guangquan ZhangAbstract:Collapse or large deformation of fractured Surrounding Rock Mass occurs frequently in underground tunnelling and results in many casualties and extensive property damage. This paper proposed a new type of remote telemetry system for monitoring the mechanical responses of underground tunnels during unloading. This system adopted both wired and wireless networking schemes, including a signal collection and transmission subsystem, a management analysis subsystem, and a remote receiving subsystem, in the tunnels. The application of this new approach in a subway tunnel indicated that the complete unloading performance of a Surrounding Rock Mass can be captured in real time and high frequency using this method, recording the deformation of the Surrounding Rock, the stress in the bolts, and the stress in the shotcrete between the Surrounding Rock and steel arch. The in situ experimental study also found that deformation of the fractured Surrounding Rock Mass in the Dashizi Tunnel showed a step-like fluctuating growth pattern. Additionally, the mechanical response of the Surrounding Rock Mass during unloading tended to stabilize when the opening face was approximately 35 m away from the monitoring section, providing new ways to optimize the excavation process and support measure.
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“Wireline + Wireless” Networking Remote Monitoring Technology for Analysing the Unloading Deformation Characteristics of the Fractured Surrounding Rock Mass Induced by Underground Excavation
Advances in Civil Engineering, 2019Co-Authors: Jianlong Sheng, Pengzhi Pan, Guangquan ZhangAbstract:Collapse or large deformation of fractured Surrounding Rock Mass occurs frequently in underground tunnelling and results in many casualties and extensive property damage. This paper proposed a new type of remote telemetry system for monitoring the mechanical responses of underground tunnels during unloading. This system adopted both wired and wireless networking schemes, including a signal collection and transmission subsystem, a management analysis subsystem, and a remote receiving subsystem, in the tunnels. The application of this new approach in a subway tunnel indicated that the complete unloading performance of a Surrounding Rock Mass can be captured in real time and high frequency using this method, recording the deformation of the Surrounding Rock, the stress in the bolts, and the stress in the shotcrete between the Surrounding Rock and steel arch. The in situ experimental study also found that deformation of the fractured Surrounding Rock Mass in the Dashizi Tunnel showed a step-like fluctuating growth pattern. Additionally, the mechanical response of the Surrounding Rock Mass during unloading tended to stabilize when the opening face was approximately 35 m away from the monitoring section, providing new ways to optimize the excavation process and support measure.
Zongli Li - One of the best experts on this subject based on the ideXlab platform.
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Study on Rock Mass Stability Effect of High Water Pressure Tunnels by Hydraulic Fracturing Failure
Deep and Underground Excavations, 2010Co-Authors: Zongli LiAbstract:The hydraulic fracturing is one of common failure in hydraulic high water pressure tunnels. The process of hydraulic fracturing of high water pressure tunnel with different initial fracture length in tunnel inner wall is simulated using nonlinear FEM. The couple effect of fracture inner water pressure with Surrounding Rock Mass deformation is considered in the model. The fracture propagation process with increasing of tunnel inner water pressure is analyzed, its effect on stress, displacement and plastic zone of tunnel Surrounding Rock Mass is obtained. The results are compared with that obtained without considering existence of fracture water pressure. There are different results from two analysis method. The results show that only couple analysis can obtain relative authentic stress, displacement and plastic zone of tunnel Surrounding Rock Mass, providing base data for correct stability assessment of Surrounding Rock Mass.
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Study on Rock Mass Stability Effect of High Water Pressure Tunnels by Hydraulic Fracturing Failure
Deep and Underground Excavations, 2010Co-Authors: Zongli LiAbstract:The hydraulic fracturing is one of common failure in hydraulic high water pressure tunnels. The process of hydraulic fracturing of high water pressure tunnel with different initial fracture length in tunnel inner wall is simulated using nonlinear FEM. The couple effect of fracture inner water pressure with Surrounding Rock Mass deformation is considered in the model. The fracture propagation process with increasing of tunnel inner water pressure is analyzed, its effect on stress, displacement and plastic zone of tunnel Surrounding Rock Mass is obtained. The results are compared with that obtained without considering existence of fracture water pressure. There are different results from two analysis method. The results show that only couple analysis can obtain relative authentic stress, displacement and plastic zone of tunnel Surrounding Rock Mass, providing base data for correct stability assessment of Surrounding Rock Mass.
