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Three-dimensional finite difference analysis of shallow sprayed concrete tunnels crossing a reverse fault or a normal fault: A parametric study

Masoud RANJBARNIA, Milad ZAHERI, Daniel DIAS

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 4,   Pages 998-1011 doi: 10.1007/s11709-020-0621-8

Abstract: Urban tunnels crossing faults are always at the risk of severe damages.the effects of a reverse and a normal fault movement on a transversely crossing shallow shotcreted tunnelvarious parameters such as the sprayed concrete thickness, the geo-mechanical properties of soil, the tunneldepth, and the fault plane dip angle are studied on the displacements of the ground surface and the tunnelstructure, and on the plastic strains of the soil mass around tunnel.

Keywords： urban tunnel     sprayed concrete     reverse fault     normal fault     finite difference analysis    

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Climate change and China’s mega urban regions

Chaolin GU, Sunsheng HAN

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 4,   Pages 418-430 doi: 10.1007/s11709-010-0075-5

Abstract: China’s mega urban regions are focal points of economic development and environmental concerns.This paper positions four mega urban regions (i.e., the Yangtze River Delta, the Pearl River Delta, theMega urban regions in China are spatial consequences of rapid economic transition.

Keywords： climate change     mega urban region     urban planning    

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Research on Demarcating Method for Deep Tunnel and Shallow Tunnel in Soil

Zhao Zhanchang,Xie Yongli

Strategic Study of CAE 2005, Volume 7, Issue 10,   Pages 84-86

Abstract:

Directed against the demarcating problems of deep tunnel and shallow tunnel in exiting methods, thefeasible by two engineering cases, and is of importantce to lining design and construction of soil tunnel

Keywords： soil tunnel     deep tunnel and shallow tunnel     demarcating method    

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Effect of cutterhead configuration on tunnel face stability during shield machine maintenance outages

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 4,   Pages 522-532 doi: 10.1007/s11709-023-0930-9

Abstract: Engineering safety during maintenance outages is determined by the stability of the tunnel face.The tunnel face is supported by a medium at the bottom of the excavation chamber and compressed air atDisregarding the supporting effect of the cutterhead will result in a tunnel face with underestimated

Keywords： tunnel face stability     cutterhead configuration     aperture ratio     pressure gradient     support ratio    

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Treatability aspects of urban stormwater stressors

Anthony N. TAFURI, Richard FIELD

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 5,   Pages 631-637 doi: 10.1007/s11783-012-0420-0

Abstract: This paper addresses the various pollutants or stressors in urban stormwater, including flow (shear force

Keywords： stormwater     wet weather flow     urban runoff    

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ECOLOGICAL EFFECTS OF NITROGEN DEPOSITION ON URBAN FORESTS: AN OVERVIEW

Frontiers of Agricultural Science and Engineering 2022, Volume 9, Issue 3,   Pages 445-456 doi: 10.15302/J-FASE-2021429

Abstract:

● Patterns and effects of N deposition on urban forests are reviewed

Keywords： biodiversity     carbon sequestration     nitrogen deposition     nutrient imbalance     soil acidification     urban    

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A survey of physical activity among urban women in China

Shilin DENG MD, Tongyuan LIU,

Frontiers of Medicine 2009, Volume 3, Issue 4,   Pages 463-469 doi: 10.1007/s11684-009-0081-y

Abstract: Few studies have been conducted to assess the level of physical activity (PA) of women in China. The purpose of this study was to describe the prevalence of PA among women in Wuhan and explore sociodemographic and behavioral correlation to PA for the population. A total of 1359 community-dwelling women (42.9713.60 years old) participated in this study. The long-version IPAQ was used to define the level of PA. 45.7% of women were considered physically active, and 27.5% were vigorously active. The proportion of physical inactivity was around 26.8%. The total and 4 domains of PA showed significant age, education level, and occupation variation. PA tended to be lower as the age declined. PA in transportation, housework, leisure time, and the total tended to be the lowest or the second lowest among the women aged 18–35 years old. PA tended to be lower as the level of education increased. Among the 5 indices, PAwas the lowest among women with college education, especially those with postgraduate education. PA tended to be the lowest among the women of office staff and instructor or technician. Generally, the total and 4 domains of PA showed significant age, education level, and occupation variation. Physical inactivity appears to be more common among younger women, or college-educated women, office ladies, and female instructor and technicians.

Keywords： physical activity     urban women     China    

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Green Innovation for Urban Traffic

Yu Zhao,Sheng-quan Wang,Ke-chao Zhu

Frontiers of Engineering Management 2015, Volume 2, Issue 1,   Pages 35-38 doi: 10.15302/J-FEM-2015016

Abstract: With the development of economy, the issue of urban traffic is becoming highlighted, the pollution ofthe urban traffic has become one of the main factors to influence environment.It faces the broader problem of achieving sustainable development of urban transportation at present.The current situation of urban traffic is analyzed through studying the existing articles at home andabroad in this paper; the problems such as green innovation of urban traffic are elaborated.

Keywords： urban traffic     green innovation     green transportation     sustainable development    

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Bending failure performance of a shield tunnel segment based on full-scale test and numerical analysis

Frontiers of Structural and Civil Engineering   Pages 1033-1046 doi: 10.1007/s11709-023-0973-y

Abstract: This study focuses on the bending failure performance of a shield tunnel segment.

Keywords： shield tunnel     bearing capacity     failure mechanism     segment reinforcement    

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Discontinuous mechanical behaviors of existing shield tunnel with stiffness reduction at longitudinal

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 1,   Pages 37-52 doi: 10.1007/s11709-022-0920-3

Abstract: analytical model is proposed to estimate the discontinuous mechanical behavior of an existing shield tunnelabove a new tunnel.The existing shield tunnel is regarded as a Timoshenko beam with longitudinal joints.Timoshenko beam GA, and different additional pressure profiles on the responses of the shield tunnel

Keywords： tunnel–soil interaction     discontinuous analysis     longitudinal joints     existing shield tunnel     Timoshenko    

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Coupling analysis of passenger and train flows for a large-scale urban rail transit system

Frontiers of Engineering Management 2023, Volume 10, Issue 2,   Pages 250-261 doi: 10.1007/s42524-021-0180-2

Abstract: flows is an important approach in evaluating and optimizing the operation efficiency of large-scale urbandiscussed in this research to effectively support train schedule optimization and capacity evaluation for urban

Keywords： urban rail transit     coupling analysis     passenger–train interaction     large-scale simulation    

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Urban design based on public safety-Discussion on safety-based urban design

Kaizhen CAI, Jianguo WANG

Frontiers of Structural and Civil Engineering 2009, Volume 3, Issue 2,   Pages 219-227 doi: 10.1007/s11709-009-0023-4

Abstract: Because of public safety problems in construction of urban surroundings, this paper expounds the necessityof the study on public safety-based urban design in perspective of modern city.It brings forward the concept of safety-based urban design and attempts to explore the basic connotation

Keywords： urban public safety     urban design     safety-based urban design    

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A real-life stability model for a large shield-driven tunnel in heterogeneous soft soils

Xinyu HU, Zixin ZHANG, Scott KIEFFER

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 2,   Pages 176-187 doi: 10.1007/s11709-012-0149-7

Abstract: The current models that have been published to date only allow for homogeneous soil at the tunnel faceThis paper presents a real-life face stability model to determine the minimal pressure needed at the tunnelface for a large shield-driven tunnel in heterogeneous soft soils.are conducted, and the effects of the involved parameters for a large, multilayered, shield-driven tunnel

Keywords： analytical solution     shield-driven tunnel     multilayered soil     face stability    

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Construction risks of Huaying mount tunnel and countermeasures

Haibo YAO, Feng GAO, Shigang YU, Wei DANG

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 3,   Pages 279-285 doi: 10.1007/s11709-017-0414-x

Abstract: inrush because of existence of faults, high pressure gas, karst tectonics and coal goafs around the tunnel

Keywords： tunnel?construction     gas?outburst     geology?prediction     automatic?monitoring?system    

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Technical innovation for Sanyang Road Cross-river Tunnel Project

Yu ZHONG

Frontiers of Engineering Management 2018, Volume 5, Issue 3,   Pages 411-415 doi: 10.15302/J-FEM-2018206

Abstract:

Keywords： valign=     top     class=     J_zhaiyao    

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Title Author Date Type Operation

Three-dimensional finite difference analysis of shallow sprayed concrete tunnels crossing a reverse fault or a normal fault: A parametric study

Masoud RANJBARNIA, Milad ZAHERI, Daniel DIAS

Journal Article

Climate change and China’s mega urban regions

Chaolin GU, Sunsheng HAN

Journal Article

Research on Demarcating Method for Deep Tunnel and Shallow Tunnel in Soil

Zhao Zhanchang,Xie Yongli

Journal Article

Effect of cutterhead configuration on tunnel face stability during shield machine maintenance outages

Journal Article

Treatability aspects of urban stormwater stressors

Anthony N. TAFURI, Richard FIELD

Journal Article

ECOLOGICAL EFFECTS OF NITROGEN DEPOSITION ON URBAN FORESTS: AN OVERVIEW

Journal Article

A survey of physical activity among urban women in China

Shilin DENG MD, Tongyuan LIU,

Journal Article

Green Innovation for Urban Traffic

Yu Zhao,Sheng-quan Wang,Ke-chao Zhu

Journal Article

Bending failure performance of a shield tunnel segment based on full-scale test and numerical analysis

Journal Article

Discontinuous mechanical behaviors of existing shield tunnel with stiffness reduction at longitudinal

Journal Article

Coupling analysis of passenger and train flows for a large-scale urban rail transit system

Journal Article

Urban design based on public safety-Discussion on safety-based urban design

Kaizhen CAI, Jianguo WANG

Journal Article

A real-life stability model for a large shield-driven tunnel in heterogeneous soft soils

Xinyu HU, Zixin ZHANG, Scott KIEFFER

Journal Article

Construction risks of Huaying mount tunnel and countermeasures

Haibo YAO, Feng GAO, Shigang YU, Wei DANG

Journal Article

Technical innovation for Sanyang Road Cross-river Tunnel Project

Yu ZHONG

Journal Article