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Mechanical responses of multi-layered ground due to shallow tunneling with arbitrary ground surface load

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 5,   Pages 745-762 doi: 10.1007/s11709-023-0935-4

Abstract: analytical model based on complex variable theory is proposed to investigate ground responses due to shallowtunneling in multi-layered ground with an arbitrary ground surface load.The present model is superior to the classical model for analyzing ground responses of shallow tunnelingthus, it can be used with assurance to estimate the ground movement and surface building safety of shallow

Keywords： analytical model     mechanical response     multi-layered ground     shallow tunneling     ground surface load    

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Comparison of shallow tunneling method with pile and rib method for construction of subway station in

Sina AMIRI; Ali Naghi DEHGHAN

Frontiers of Structural and Civil Engineering 2022, Volume 16, Issue 6,   Pages 704-717 doi: 10.1007/s11709-021-0746-4

Abstract: In the present study, a comparison between the new shallow tunneling method (STM) and the traditional

Keywords： shallow tunneling method     pile and rib method     ground surface settlement     subway station construction    

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Research on shallow tunneling construction method of large section tunnel under the water-rich sandy

Tang Guorong,Liu Zhaowei,Li Jianhua

Strategic Study of CAE 2010, Volume 12, Issue 12,   Pages 98-102

Abstract:

The CRD(cross diaphragm) and hole pile method were adopted in the large section tunnel,aiming at poor geological stability, complex engineering environment and the higher control requirements of subsidence in water-rich sandy gravel stratum of Beijing,which controlled the deformation of engineering structure,surrounding buildings along and underground pipeline effectively and ensured the safety of surrounding environment.

Keywords： sandy gravel stratum     large section     CRD method     hole pile     tunnel construction    

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Changes of ecological conditions induced by rock tunneling in Laoshan Mountain area

LI Xiaozhao, ZHAO Xiaobao, WANG Zhongsheng

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 4,   Pages 366-370 doi: 10.1007/s11709-008-0056-0

Abstract: It is found that the environmental factors and vegetation situation have been influenced by the tunneling

Keywords： supplement     fragmentation     reference     tunneling activity     vegetation situation    

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Centrifuge experiments for shallow tunnels at active reverse fault intersection

Mehdi SABAGH, Abbas GHALANDARZADEH

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 3,   Pages 731-745 doi: 10.1007/s11709-020-0614-7

Abstract: Tunnels extend in large stretches with continuous lengths of up to hundreds of kilometers which are vulnerable to faulting in earthquake-prone areas. Assessing the interaction of soil and tunnel at an intersection with an active fault during an earthquake can be a beneficial guideline for tunnel design engineers. Here, a series of 4 centrifuge tests are planned and tested on continuous tunnels. Dip-slip surface faulting in reverse mechanism of 60-degree is modeled by a fault simulator box in a quasi-static manner. Failure mechanism, progression and locations of damages to the tunnels are assessed through a gradual increase in Permanent Ground Displacement (PGD). The ground surface deformations and strains, fault surface trace, fault scarp and the sinkhole caused by fault movement are observed here. These ground surface deformations are major threats to stability, safety and serviceability of the structures. According to the observations, the modeled tunnels are vulnerable to reverse fault rupture and but the functionality loss is not abrupt, and the tunnel will be able to tolerate some fault displacements. By monitoring the progress of damage states by increasing PGD, the fragility curves corresponding to each damage state were plotted and interpreted in related figures.

Keywords： reverse fault rupture     continuous tunnel     geotechnical centrifuge     ground surface deformations     fragility curves    

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Strategic Thinking on Shallow-water Oil and Gas Exploration in Offshore China

Ke-qiang Wu,Jian-yong Xu,Bo Kang

Frontiers of Engineering Management 2016, Volume 3, Issue 4,   Pages 349-355 doi: 10.15302/J-FEM-2016056

Abstract: offshore China has made great achievements, and as the important areas of offshore exploration, the shallowTherefore, for effective exploration of shallow-water oil and gas in offshore China, it is necessary

Keywords： offshore China     shallow-water oil and gas exploration     strategic thinking     challenge     countermeasure    

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Model test and discrete element method simulation of shield tunneling face stability in transparent clay

Huayang LEI, Yajie ZHANG, Yao HU, Yingnan LIU

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 1,   Pages 147-166 doi: 10.1007/s11709-020-0704-6

Abstract: The stability of the shield tunneling face is an extremely important factor affecting the safety of tunnelThe stability of the shield tunneling face (failure mode, influence range, support force, and surfaceperformed to investigate the active failure mode, influence range, and support force of the shield tunnelingcode three-dimensional numerical simulations are conducted to verify the failure mode of the shield tunneling

Keywords： shield tunneling face     stability     transparent clay     model test     numerical simulation    

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Drive system design and error analysis of the 6 degrees of freedom segment erector of shield tunneling

Hu SHI, Guofang GONG, Huayong YANG

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 3,   Pages 369-376 doi: 10.1007/s11465-011-0223-1

Abstract:

Focusing on a segment erector of a shield-tunneling machine developed with 6 degrees of freedom (DOF

Keywords： shield tunneling machine     segment erector     kinematics     position and attitude precision    

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Prediction of shield tunneling-induced ground settlement using machine learning techniques

Renpeng CHEN, Pin ZHANG, Huaina WU, Zhiteng WANG, Zhiquan ZHONG

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 6,   Pages 1363-1378 doi: 10.1007/s11709-019-0561-3

Abstract: Predicting the tunneling-induced maximum ground surface settlement is a complex problem since the settlementnetwork (GRNN), extreme learning machine, support vector machine and random forest (RF), to predict tunneling-inducedThe results indicated that ML algorithms have great potential to predict tunneling-induced settlementalgorithms show the best performance among six ML algorithms, which accurately recognize the evolution of tunneling-induced

Keywords： EPB shield     shield tunneling     settlement prediction     machine learning    

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Analysis of load and adaptability of disc cutters during shield tunneling in soft–hard varied strata

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 4,   Pages 533-545 doi: 10.1007/s11709-023-0946-1

Abstract: shield machines exhibit unsatisfactory adaptability and performance during the soft–hard varied strata tunnelingTo analyze the rotation state, cutting performance, and adaptability of disc cutters during shield tunnelingA greater penetration is suggested for soft-strata tunneling to allow the disc cutters to rotate smoothly

Keywords： shield tunneling     disc cutter load     laboratory excavation test     numerical calculation     soft–hard varied    

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QPSO-ILF-ANN-based optimization of TBM control parameters considering tunneling energy efficiency

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 1,   Pages 25-36 doi: 10.1007/s11709-022-0908-z

Abstract: Rock mass classes and tunneling parameters obtained in real time are used as the input of the QPSO-ILF-ANN

Keywords： machine     control parameter optimization     quantum particle swarm optimization     artificial neural network     tunneling    

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Control concept and countermeasures for shallow lakes' eutrophication in China

JIN Xiangcan, LU Shaoyong, HU Xiaozhen, JIANG Xia, WU Fengchang

Frontiers of Environmental Science & Engineering 2008, Volume 2, Issue 3,   Pages 257-266 doi: 10.1007/s11783-008-0063-3

Abstract: Research on lake eutrophication in China began in the early 1970s, and many lakes in China are now known to be in meso-eutrophic status. Lake eutrophication has been showing a rapidly increasing trend since 2000. Investigations show that the main reasons for lake eutrophication include a fragile lake background environment, excessive nutrient loading into lakes, excessive human activities, ecological degeneration, weak environmental protection awareness, and lax lake management. Major mechanisms resulting from lake eutrophication include nutrient recycling imbalance, major changes in water chemistry (pH, oxygen, and carbon), lake ecosystem imbalance, and algal prevalence in lakes. Some concepts for controlling eutrophication should be persistently proposed, including lake catchment control, combination of pollutant source control with ecological restoration, protection of three important aspects (terrestrial ecology, lake coast zone, and submerged plant), and combination of lake management with regulation. Measures to control lake eutrophication should include pollution source control (i.e., optimize industrial structural adjustments in the lake catchment, reduce nitrogen and phosphorus emission amounts, and control endogenous pollution) and lake ecological restoration (i.e. establish a zone-lake buffer region and lakeside zone, protect regional vegetation, utilize hydrophytes in renovation technology); countermeasures for lake management should include implementing water quality management, identifying environmental and lake water goals, legislating and formulating laws and regulations to protect lakes, strengthening publicity and the education of people, increasing public awareness through participation in systems and mechanic innovations, establishing lake region management institutions, and ensuring implementation of governance and management measures.

Keywords： excessive     participation     prevalence     lakeside     Research    

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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, the

Keywords： soil tunnel     deep tunnel and shallow tunnel     demarcating method    

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Numerical simulation of flood inundation processes by 2D shallow water equations

ZHANG Xinhua, LONG Wenfei, XIE Heping, ZHU Jiahua, WANG Jiangping

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 1,   Pages 107-113 doi: 10.1007/s11709-007-0011-5

Abstract: and to reduce the loss of lives and properties in urban areas, a numerical simulation model using 2D shallow

Keywords： control     satisfactory     management     central     rescue    

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Reliability assessment of three-dimensional bearing capacity of shallow foundation using fuzzy set theory

Rajarshi PRAMANIK, Dilip Kumar BAIDYA, Nirjhar DHANG

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 2,   Pages 478-489 doi: 10.1007/s11709-021-0698-8

Abstract: The aim of this study is to investigate the applicability of reliability theory on surface square/rectangular footing against bearing capacity failure using fuzzy set theory in conjunction with the finite element method. Soil is modeled as a three-dimensional spatially varying medium, where its parameters (cohesion, friction angle, unit weight, etc.) are considered as fuzzy variables that maintain some membership functions. Soil is idealized as an elastic-perfectly plastic material obeying the Mohr–Coulomb failure criterion, where both associated and non-associated flow rules are considered in estimating the ultimate bearing capacity of the footing. The spatial variability of the soil is incorporated for both isotropic and anisotropic fields, which are determined by the values of scales of fluctuation in both the horizontal and vertical directions. A new parameter namely, limiting applied pressure at zero failure probability is proposed, and it indirectly predicts the failure probability of the footing. The effect of the coefficient of variation of the friction angle of the soil on the probability of failure is analyzed, and it is observed that the effect is significant. Furthermore, the effect of the scale of fluctuation on the probability of failure is investigated, and the necessity for considering spatial variability in the reliability analysis is well proven.

Keywords： finite element method     square footing     reliability analysis     fuzzy set theory     coefficient of variation     spatial variability    

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Title Author Date Type Operation

Mechanical responses of multi-layered ground due to shallow tunneling with arbitrary ground surface load

Journal Article

Comparison of shallow tunneling method with pile and rib method for construction of subway station in

Sina AMIRI; Ali Naghi DEHGHAN

Journal Article

Research on shallow tunneling construction method of large section tunnel under the water-rich sandy

Tang Guorong,Liu Zhaowei,Li Jianhua

Journal Article

Changes of ecological conditions induced by rock tunneling in Laoshan Mountain area

LI Xiaozhao, ZHAO Xiaobao, WANG Zhongsheng

Journal Article

Centrifuge experiments for shallow tunnels at active reverse fault intersection

Mehdi SABAGH, Abbas GHALANDARZADEH

Journal Article

Strategic Thinking on Shallow-water Oil and Gas Exploration in Offshore China

Ke-qiang Wu,Jian-yong Xu,Bo Kang

Journal Article

Model test and discrete element method simulation of shield tunneling face stability in transparent clay

Huayang LEI, Yajie ZHANG, Yao HU, Yingnan LIU

Journal Article

Drive system design and error analysis of the 6 degrees of freedom segment erector of shield tunneling

Hu SHI, Guofang GONG, Huayong YANG

Journal Article

Prediction of shield tunneling-induced ground settlement using machine learning techniques

Renpeng CHEN, Pin ZHANG, Huaina WU, Zhiteng WANG, Zhiquan ZHONG

Journal Article

Analysis of load and adaptability of disc cutters during shield tunneling in soft–hard varied strata

Journal Article

QPSO-ILF-ANN-based optimization of TBM control parameters considering tunneling energy efficiency

Journal Article

Control concept and countermeasures for shallow lakes' eutrophication in China

JIN Xiangcan, LU Shaoyong, HU Xiaozhen, JIANG Xia, WU Fengchang

Journal Article

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

Zhao Zhanchang,Xie Yongli

Journal Article

Numerical simulation of flood inundation processes by 2D shallow water equations

ZHANG Xinhua, LONG Wenfei, XIE Heping, ZHU Jiahua, WANG Jiangping

Journal Article

Reliability assessment of three-dimensional bearing capacity of shallow foundation using fuzzy set theory

Rajarshi PRAMANIK, Dilip Kumar BAIDYA, Nirjhar DHANG

Journal Article