Response characteristics and preventions for seismic subsidence of loess in Northwest China

Qiu, Junling; Wang, Xiuling; Lai, Jinxing; Zhang, Qian; Wang, Junbao

doi:10.1007/s11069-018-3272-5

Cited by 84 publications

(41 citation statements)

References 56 publications

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“…In recent years, geological hazards happened frequently [1][2][3], and with the development of rock engineering [4,5] and civil engineering [6][7][8][9], a substantial number of tunnel projects have been constructed in complex geological areas as western development strategies have been implemented in China [10][11][12][13][14][15][16]. e construction of loess tunnels has become a focus of the tunnel field, and many relevant practical experience and theoretical results have been obtained [17][18][19][20][21][22][23]. However, with the increasing number of loess tunnel projects, a new challenge has arisen.…”

Section: Introductionmentioning

confidence: 99%

Displacement and Stress Characteristics of Tunnel Foundation in Collapsible Loess Ground Reinforced by Jet Grouting Columns

Liu

et al. 2018

Advances in Civil Engineering

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Collapsible loess tunnel foundation reinforcement is a new challenge in the construction process of tunnel engineering. According to the field displacement and stress monitoring of the Fujiayao loess tunnel, this paper investigates the reinforcing effect of a high-pressure jet grouting pile on a collapsible loess tunnel foundation in the deep large-span tunnel. The field monitoring method was employed to address the performance of tunnel foundation settlement, additional stress, earth pressure, rock pressure, etc. The results indicate that the stress on the pile tops and the earth pressure between piles increase gradually over time in two stages: stress increases rapidly in the first 45 days and, after this period, stress tends to gradually stabilize. Further, stress increases uniformly with the distance from the centerline of the tunnel, and the rock pressure of the tunnel sidewalls tends to be stable within two months of being constructed. Additional stress on the tunnel foundation increases linearly with time, and it is uniformly distributed in the vertical and horizontal directions of the tunnel section. Settlement of the tunnel foundation also gradually increases with time, and it tends to be stable at 50 days from the time of construction. Additionally, the settlements of different monitoring points are similar at the same depth. The research results will further improve the theoretical knowledge of tunnel bottom reinforcement in the loess tunnel, which not only can effectively guide the design and construction of the loess tunnel and reduce disease treatment cost but also can provide the necessary basic research data and scientific theoretical basis for revision of the corresponding specifications of highway tunnels and railway tunnels.

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Section: Introductionmentioning

confidence: 99%

Displacement and Stress Characteristics of Tunnel Foundation in Collapsible Loess Ground Reinforced by Jet Grouting Columns

Liu

et al. 2018

Advances in Civil Engineering

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“…However, during the construction stage, many problems in the tunnel design are discovered [50][51][52]. Collision inspection can avoid problems such as tunnel bolts collision and pipeline crossing during construction, which greatly improves the construction efficiency [53][54][55] Therefore, collision inspection before tunnel construction is a critical task in tunnel design.…”

Section: Collision Inspectionmentioning

confidence: 99%

Catia-Based Bim Technology in Highway Tunnel Design

Yang¹,

Lu²,

Qin³

2019

CEJ

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Referring to CATIA's 'assemblies + parts' modeling method, CATIA-based BIM (Building Information Modeling) technology has been proposed for highway tunnel design in this paper. A tunnel BIM is created by CATIA, which is based on a real case in China, focusing on the following 3 aspects: (1) Creating tunnel bolts by UDF + Loop cyclic arrangement method; (2) Using Sketch Tracer module to create tunnel portal; (3) Parameter is used to create and call the Catalog database. Then, bolt collision inspection and U-shaped groove concrete statistics are conducted with the help of the tunnel BIM created. Finally, the finite element analysis of tunnel construction process is carried out through the CATIA-Midas interface. The results demonstrate that the CATIAbased BIM technology can well adapt to the characteristics of tunnel and have well potential applications in tunnel design.

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“…Statistical analyses of the typical methane explosion accidents occurring in various countries were made and information of methane emission should be included in geotechnical baseline report (Hanifi et al 2012;Kang et al 2013;Morsali and Rezaei 2017;Qiao et al 2018aQiao et al , 2018b. According to statistics, more than 100 methane tunnels have been built in China since 2005, and China has gained rich experience in the design, construction and operation management of methane tunnels Zhang et al 2018Zhang et al , 2019aZhang et al , 2019bQiu et al 2018aQiu et al , 2018bQiu et al , 2018c. However, during the construction period, due to careless CONTACT Haobo Fan fanhbjc@chd.edu.cn; Rui Ren renrui@chd.edu.cn In the rock mass containing coal seam, methane explosion accidents occur occasionally during tunnel construction.…”

Section: Introductionmentioning

confidence: 99%

Methane explosion accidents of tunnels in SW China

Fan

et al. 2019

Geomatics, Natural Hazards and Risk

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This Express Letter reports three methane explosion accidents during tunnel construction in Southwest China. In recent years, tunnel construction of China is developing rapidly. The geological conditions of the tunnel passing through are extremely complex, especially, tunnels in coal strata increase rapidly, what's worse, many methane explosions occur during the tunnel construction. The backgrounds, causes and rescue operation of three methane explosion accidents situation are studied. Furthermore, we proposed relevant measures to prevent methane explosions of tunnels. ARTICLE HISTORY

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Response characteristics and preventions for seismic subsidence of loess in Northwest China

Cited by 84 publications

References 56 publications

Displacement and Stress Characteristics of Tunnel Foundation in Collapsible Loess Ground Reinforced by Jet Grouting Columns

Displacement and Stress Characteristics of Tunnel Foundation in Collapsible Loess Ground Reinforced by Jet Grouting Columns

Catia-Based Bim Technology in Highway Tunnel Design

Methane explosion accidents of tunnels in SW China

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