Application of magnetic resonance sounding to tunnels for advanced detection of water-related disasters: A case study in the Dadushan Tunnel, Guizhou, China

Qin, Shengwu; Ma, Zhongjun; Jiang, Chuandong; Lin, Jun; Bai, Mingzhou; Lin, Tingting; Yi, Xiaofeng; Shang, Xinlei

doi:10.1016/j.tust.2018.11.032

Cited by 24 publications

(11 citation statements)

References 21 publications

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“…This method is based on the electrical and magnetic differences of the abnormal body. On the tunnel wall or face, the ungrounded loop device or ground wire source is used to launch a pulse magnetic eld on the surrounding rock of the tunnel, and the conductive geological body in the target area is induced to generate a secondary eld under the in uence of the pulse magnetic eld, and the detection of water-rich area is realized by the analysis of the secondary eld [15][16][17].The geological radar method is also a widely used advanced geological prediction technology at present. This method carries out detection work on the face and tunnel wall.…”

Section: Introductionmentioning

confidence: 99%

Applied Research of comprehensive advance geological prediction in Daluoshan diversion tunnel

Liu

Gan

2023

Preprint

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In order to study the accuracy of the comprehensive advance geological prediction method in the prediction of geological conditions in the tunnel construction project, based on the Daluoshan Diversion Tunnel Project in Wenzhou, Zhejiang Province, this paper selects typical sections of the diversion tunnel, uses the tunnel seismic scattering imaging technology TST and geological radar to transmit seismic and electromagnetic signals to the face detection section, and processes and interprets the collected signal information. The verification is carried out by using advanced blasthole and advanced drilling. The results show that the geological prediction results are relatively consistent with the actual exposure, and the advance geological prediction can give play to the advantages of various technologies and verify each other, which can greatly improve the accuracy of the advance geological prediction in the application of the headrace tunnel, and provide reference and basis for the later construction, and provide safety assurance.

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Section: Introductionmentioning

confidence: 99%

Applied Research of comprehensive advance geological prediction in Daluoshan diversion tunnel

Liu

Gan

2023

Preprint

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“…Therefore, effectively obtaining the ruptured sections under these two failure forms is undoubtedly important as a reference to the supporting form selection of surrounding rock and the prediction of rock mass fracture and instability. At present, the observation techniques of rock mechanics tests include computed tomography (CT), magnetic resonance imaging (MRI), and acoustic emission (AE) 35–38 . Although CT and MRI can be used to visualize the propagation path of the cracks, the internal mechanism of the cracks cannot be effectively identified and analyzed, and the test cost is fairly high 37,38 .…”

Section: Introductionmentioning

confidence: 99%

“…At present, the observation techniques of rock mechanics tests include computed tomography (CT), magnetic resonance imaging (MRI), and acoustic emission (AE) 35–38 . Although CT and MRI can be used to visualize the propagation path of the cracks, the internal mechanism of the cracks cannot be effectively identified and analyzed, and the test cost is fairly high 37,38 . AE is mainly analyzed from the perspectives of energy rate, event rate, fracture point location, temporal sequence, and frequency domain.…”

Section: Introductionmentioning

confidence: 99%

Study on the fracture behavior of prefabricated fissures granite based on DIC and laser scanning techniques

Hao

et al. 2021

Fatigue Fract Eng Mat Struct

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The initiation, propagation, and coalescence of cracks in the rock bridge are the root causes of rock failure. However, the identification of cracks propagation paths is a problem in rock mechanics. This paper studies the evolutionary law of the strain field in the rock bridge region of granite with pre‐fissures using 3D‐DIC after equivalence and simplification. Based on the real crack initiation mechanism of “relative slip between regions” proposed in this paper, combined with the priority order of crack propagation at the edge of the rock bridge, the pattern of cracks propagation and coalescence was obtained. We analyze the fracture characteristics in roughness and morphology to verify the validity of the proposed mechanism. The tensile and shear failure areas around the rock bridge were identified quantitatively, and the roughness, fractal dimension, and energy consumption of the sections formed by tensile failure and shear failure are different.

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“…Considering a coal rock tunnel in an enriched aquifer that might cause water flooding and sand gushing in the working face, Yang et al designed a test model for the mixed water and sand inrush and transferred to simulate the startup, transfer, and inrush process in the overburden fracture channel [8]. Taking the water inrush accident in the Dadushan rock tunnel located in the southwestern karst region of Guizhou Province, China, as an example, Qin et al conducted a comprehensive study on the TMRS by utilizing forward modeling and numerical experiments, in which the relationship between the magnetic resonance signal response and the position and water content of water-bearing structures was identified by forward modeling [9]. In a case study of water inrush and mud gushing railway rock tunnels, Zhou and Liao analyzed the mechanism of water inrush and mud gushing under high water pressure and put forward appropriate treatment methods.…”

Section: Introductionmentioning

confidence: 99%

Influence of Water Inrush from Excavation Surface on the Stress and Deformation of Tunnel‐Forming Structure at the Launching‐Arrival Stage of Subway Shield

Wen

Zhai

et al. 2019

Advances in Civil Engineering

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The launching-arrival stage of the shield is the most dangerous construction stage in subway construction. During the conversion process of the soil and air medium in the shield machine, water inrush at the excavation surface often occurs because of the effect of groundwater. Previous research has focused on the overall stress and deformation of existing tunnels caused by water inrush from the excavation face of the shield machine excavation stage. However, the stress and deformation states of the segments and anchors at different assembly locations of the tunnel, as well as the interaction between the soil reinforcement region and the segments and anchors in the launching-arrival stage have not been considered in previous studies. In this study, the inrush model of the launching-arrival stage of the subway shield was established by utilizing the equivalent refinement modeling technology and ABAQUS simulation analysis with consideration of the fluid-solid coupling effect of water and soil to study the influences of different water head differences on the mechanical and deformation properties of segments and anchors in shield construction under the conditions of water inrush on the excavation surface. The results showed that the water inflow from the tunnel excavation surface caused significant surface subsidence at the tunnel portal, vertical convergence at the cross section of the shield tunnel, and significant increases in the axial and shear forces on the bolt. In addition, based on the existing subway regulation, combined with the simulation results of soil reinforcement measures at different depths, the emergency control criterion for controlling water inrush on the excavation surface was established by using the depth of soil reinforcement. The minimum depth of the reinforced soil from the ground surface at 15 m is recommended to ensure construction safety of the subway shield at the launching-arrival stage.

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Application of magnetic resonance sounding to tunnels for advanced detection of water-related disasters: A case study in the Dadushan Tunnel, Guizhou, China

Cited by 24 publications

References 21 publications

Applied Research of comprehensive advance geological prediction in Daluoshan diversion tunnel

Applied Research of comprehensive advance geological prediction in Daluoshan diversion tunnel

Study on the fracture behavior of prefabricated fissures granite based on DIC and laser scanning techniques

Influence of Water Inrush from Excavation Surface on the Stress and Deformation of Tunnel‐Forming Structure at the Launching‐Arrival Stage of Subway Shield

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