Study on an improved real-time monitoring and fusion prewarning method for water inrush in tunnels

Sheng, Wang; Li, Liping; Cheng, Shuai; Yang, Junyan; Jin, Hao; Gao, Shang; Wen, Tao

doi:10.1016/j.tust.2021.103884

Cited by 52 publications

(17 citation statements)

References 20 publications

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“…The grouting thickness is 5~8 m, the grouting length is 15~18 m (3~3.6 times the thickness), and the grouting amount per meter is 34.2 m 3 . Wang et al [11] proposed a new method of real-time monitoring and fusion early warning of tunnel water inrush. Zhu et al [12] proposed a fuzzy comprehensive evaluation method for water inrush risk of tunnel water rich fault based on grey theory.…”

Section: Introductionmentioning

confidence: 99%

Influence of Water-Resisting Layer Thickness on Fracture Evolution in Karst Tunnel and Control Measures

Jiang

2022

Geofluids

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In this paper, a series of studies are carried out on the hidden karst encountered in the excavation of Baziling tunnel. In this paper, the safe thickness of the water-resisting layer in a hidden karst cave and tunnel is studied by means of engineering geological investigation, numerical simulation, and neural network. The numerical calculation model is established through the geological survey. Innovate to use BP neural network and differentiation algorithm to inverse the rock mechanical parameters. By analyzing the influence of different thicknesses of the water-resisting layer on the deformation and failure of surrounding rock, the final thickness of the water-resisting layer is obtained. At the same time, the influence of water pressure on the thickness of the water-resisting layer is studied, and the treatment scheme under different water pressure is finally determined.

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Section: Introductionmentioning

confidence: 99%

Influence of Water-Resisting Layer Thickness on Fracture Evolution in Karst Tunnel and Control Measures

Jiang

2022

Geofluids

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“…Wang et al studied an improved method for the accurate measurement of sensors and wireless transmission bands suitable for complex tunnel environments. [18]. Hou et al presented a method for sensing tunnel cross-section deformation based on distributed fiber optic sensing and a neural network [19].…”

Section: Introductionmentioning

confidence: 99%

Monitoring System for the Construction of Arch Cover Method Subway Station Based on DT and IoT

Jiang

2022

Journal of Sensors

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Aiming at the problems of safety and monitoring beyond the existing experience in the construction of the subway stations with arch cover method in Dalian, China, combined with the real-time monitoring requirements of intelligent construction status, a multi-information construction monitoring system based on digital twin(DT) and Internet of Things(IoT) is proposed, and the digital twin 3D architecture is established. First, on the basis of the IoT monitoring experience of tunnel, the installation plan of the automatic monitoring device of the arch cover method subway station is clarified, and the sensor arrangement is carried out. Then, based on the Revit platform, the establishment of the main structure model of the station and the BIM parametric modeling technology of the sensors are realized, and the monitoring properties of the sensors are expanded. Finally, through the design of the BIM database and in the form of secondary development, a BIM-based construction information visualization monitoring system is established to realize the correlation between the sensor model and the monitoring data and achieve the effect of information visualization query and color change early warning. The system was initially applied at Shikui Road Station of Dalian Metro Line 5 and achieved good results. The system can intuitively reproduce and accurately describe the subway station construction status, which provides an advanced technical means for the informatization and visualization management of the construction of arch cover method subway stations.

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“…Liu et al (2019) conducted seismic ahead prospecting to detect the fractured and karst zones and then applied resistivity ahead prospecting to investigate the water-bearing condition of the fractured and karst zones in limestone strata of Jilin Yinsong TBM project (China). Wang et al (2021) presented a real-time water inrush monitoring system using the accurate measurement of sensors and wireless transmission bands and developed an early warning method for multi-information interval fusion on the basis of evidence and fuzzy set theory to achieve the fusion of the time series monitoring data. Li.…”

Section: Introductionmentioning

confidence: 99%

Multi-Step Combined Control Technology for Karst and Fissure Water Inrush Disaster During Shield Tunneling in Spring Areas

Huang

Zhang

et al. 2021

Front. Earth Sci.

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Shield tunneling in highly fractured karst water-rich conditions easily results in water inrush disaster or even causes the roof of the karst caves to collapse. Severe water inrush disasters have occurred during the EPB (earth pressure balance) shield machine of the Jinan Metro Line R1 advanced through a karst and fissure groundwater-rich limestone ground in the spring area. To cope with the extreme water inrush risk, a multi-step combined control technology was put forward. First, a detailed geological exploration was carried out by ahead geophysical prospecting using high-density resistivity method, geological radar, etc., and geological borehole drilling was conducted from the ground surface before excavation. As a result, the distribution orientation, size, fissure development degree, and water inflow channel within the surrounding rock of the karst caves were detected. Second, multi-step grouting was performed to reinforce the surrounding rock, including pre-grouting treatment and filling rock blocks to the big karst caves from the ground surface, multiple grouting with a small amount of inert slurry each time inside the tunnel, and secondary circumferential hoop grouting at the shield tail. Third, the tunneling process was optimized, including optimizing the tunneling parameters, making full use of the air-pressurized tunneling technology of the EPB to press bentonite into the fractures around the excavation cabin to seal the fissure water, and using the drainage system of EPB and muck improvement technology to reduce the water inrush disaster. Meanwhile, shield protection slurry technology is applied to cutter inspection and replacement in the pressurized chamber under dynamic water flow environment of the spring terrain. The practice shows that the water inrush on the tunnel face is obviously alleviated after the shield machine advanced into the grouting area. According to statistics, the water inflow on the tunnel face decreases from about 4 m3/h before treatment to less than 0.3 m3/h after the abovementioned control, and the water seepage between the segmental linings reduces to almost zero. The average advance rate increased from 3 m/day without stopping or even zero when the shield machine needs to shut down 2–3 days for drainage to about 6 m/day. In addition, the treatments prevented the shield machine from jamming and the head descending disaster. This study provided a reliable control method for shield tunneling through the karst and fissure water-rich area and played an essential role in protecting the spring water.

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Study on an improved real-time monitoring and fusion prewarning method for water inrush in tunnels

Cited by 52 publications

References 20 publications

Influence of Water-Resisting Layer Thickness on Fracture Evolution in Karst Tunnel and Control Measures

Influence of Water-Resisting Layer Thickness on Fracture Evolution in Karst Tunnel and Control Measures

Monitoring System for the Construction of Arch Cover Method Subway Station Based on DT and IoT

Multi-Step Combined Control Technology for Karst and Fissure Water Inrush Disaster During Shield Tunneling in Spring Areas

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