scholarly journals Analysis of Ground Settlement in Metro Tunnel Construction with Shield Tunneling Method

2020 ◽  
Vol 495 ◽  
pp. 012039
Author(s):  
LU Shen
Keyword(s):  
Tunnel Construction ◽  
Ground Settlement ◽  
Shield Tunneling ◽  
Tunneling Method ◽  
Metro Tunnel

Impact of Double-O-Tube Shield Tunnel Construction on Grillage Beams Foundation Frame Building

2011 ◽  
Vol 71-78 ◽  
pp. 32-36 ◽  
Author(s):  
Xin Jiang Wei ◽  
Jie Hong ◽  
Gang Wei
Keyword(s):  
Principal Stress ◽  
Differential Settlement ◽  
Shield Tunnel ◽  
Tunnel Construction ◽  
Foundation Settlement ◽  
Ground Settlement ◽  
Shield Tunneling ◽  
Frame Building ◽  
Shield Machine ◽  
The Impact

Considering the interaction of building-soil-tunnel, the grillage beams foundation frame building vertical crossed by Double-O-Tube (DOT) shield tunnel was simulated by 3D MIDAS/ GTS software, and the impact of construction on the building was analyzed. The results show that: the ground settlement trough caused by DOT shield tunnel can be fitted by peck formula; during the passage of the shield tunneling through the building, the settlement of the building increased and settlement trough was wilder; the settlement was stable and had a little rebound when shield machine already passed the building; with the increase of driving distance, the first principal stress P1 increased and then was stable; with the increase of L, the shape of foundation settlement curve changed, and the maximum differential settlement between columns increased but was small.

Analysis on Influence of Shield Tunneling on Bridge Double Pile

2015 ◽  
Vol 777 ◽  
pp. 3-7
Author(s):  
Pei Sheng Xi ◽  
Xiao Zhao ◽  
Zhen Li
Keyword(s):  
Horizontal Displacement ◽  
Horizontal Direction ◽  
Shield Tunnel ◽  
Tunnel Construction ◽  
Ground Settlement ◽  
Lagrangian Analysis ◽  
Shield Tunneling ◽  
Tunnel Excavation ◽  
Pile Deformation ◽  
Main Deformation

Shield tunneling have varying degrees of impact on the surrounding buildings and the surrounding environment. Based on the shield tunneling of Hefei Subway Line 1 Ma'anshan viaduct, a 3D Fast Lagrangian Analysis of Continua is be used to simulate the shield tunnel construction and analyze the ground settlement and bridge pile deformation caused by tunnel construction. The numerical modeling results by analyzing the displacement variation and soil affected area at different distances show that when the shield tunnel excavation, the ground settlement becomes smaller with increasing distance from the shield center line of the pile and the maximum ground settlement is 10.778mm. The main deformation of bridge pile is in horizontal direction with a maximum horizontal direction of 2.0758mm. Horizontal displacement changes lager at the top of the pile, along with changes in the horizontal displacement of the pile depth becomes smaller, 15m is a turning point.

The Research of Backfill Grouting Pressure in Shield Tunneling

2012 ◽  
Vol 446-449 ◽  
pp. 2240-2245
Author(s):  
Jin Li Qiao ◽  
Yong Li Fan ◽  
Bo Liu ◽  
Yan Ping Zhang ◽  
Yan Yan Li
Keyword(s):  
Injection Pressure ◽  
Tunnel Construction ◽  
Simulation Studies ◽  
Relative Method ◽  
Ground Settlement ◽  
Stress Growth ◽  
Shield Tunneling ◽  
Grouting Pressure ◽  
Slurry Injection

As to shield tunneling, that soil is reinforced into the void is one of the most important reasons which cause the ground settlement, and always most important factor in the tunnel construction and the relative research. The numerical simulation studies presented in this paper focus on the different grouting pressure causing different ground settlement, plastic area and stress growth behavior. Based on the simulation results and the engineering ground settlement limit, propose reasonable synchronous slurry injection pressure and the relative method of controlling ground settlement. Propose reasonable suggestion for the determination of grouting pressure during shield construction.

Study on Underground Utilities Settlement during the Construction of Shield Tunnel

2011 ◽  
Vol 243-249 ◽  
pp. 3445-3448
Author(s):  
Hai Xia Sun ◽  
Hai Yu Wu ◽  
Wen Zhao
Keyword(s):  
Stress Field ◽  
Ground Water ◽  
Water Table ◽  
Continuity Equation ◽  
Shield Tunnel ◽  
Tunnel Construction ◽  
Hydrodynamic Equations ◽  
Ground Settlement ◽  
Shield Tunneling ◽  
Underground Utilities

Shield tunneling construction inevitably makes impacts on underground utilities. This paper takes some Metro engineering for background, study the underground utilities settlement rules induced by shield tunneling construction. As for shallow-buried and high ground water table tunnel, the coupling of hydrological and stress field must be paid attention. By seepage continuity equation and hydrodynamic equations, study changing situation of the deformation and stress by contrast the effect of seepage. And, contrast the measured value and simulation value to verify the rationality of using fluid-solid coupling method to forecast the ground settlement during tunnel construction.

Research on Stability in Metro Tunnel Constructing with Shallow Buried Covered Excavation in Loose Sand Layers

2012 ◽  
Vol 594-597 ◽  
pp. 1240-1244
Author(s):  
Shen Gang Li ◽  
Wen Zhao ◽  
Xiao Li Cai ◽  
Yin Fu Ma ◽  
Lu Zhang
Keyword(s):  
Numerical Calculation ◽  
Side Wall ◽  
Tunnel Construction ◽  
Loose Sand ◽  
Ground Settlement ◽  
Single Side ◽  
Calculation Results ◽  
Metro Tunnel

For subway tunneling in urban underground, high safty of construction is needed.However, the safty and rationality of excavating plan are forecasted difficultly because of consealment. Based on the Zhang-Shen tunnel construction of Shenyang subway, bench method, single side-wall heading excavation method and CD excavation method are numerical simulated; according to the numerical calculation results and the constructing process, bench method is adopted; the ground settlement caused by excavation monitored during excavating is in the allowed range and the tunnel is safe during excavating.

Study on Risks and Countermeasures of Shallow Biogas during Construction of Metro Tunnels by Shield Boring Machine

2021 ◽  
pp. 036119812199459
Author(s):  
Xi Jiang ◽  
Yuxin Zhang ◽  
Zhuanzhuan Zhang ◽  
Yun Bai
Keyword(s):  
Risk Identification ◽  
Tunnel Construction ◽  
Construction Process ◽  
Shield Tunneling ◽  
Daily Lives ◽  
Construction Experience ◽  
Property Loss ◽  
Potential Risks ◽  
Metro Tunnel ◽  
And Control

With the intensive development of cities, the utilization of underground space has attracted more and more attention from industry and academia. Underground rail (metro) in cities has become an imperative mode for people in their daily lives. Meanwhile, the safety of rail tunnel construction has constantly been a challenging issue because of the presence of complex strata containing shallow biogas. Accidents in tunnel construction because of shallow biogas which resulted in massive casualties and property loss have been reported in some recent literature. The excavation of formations containing shallow biogas not only poses a threat to the safety of the earlier stage of tunnel construction but also affects the later operation of metro lines. Therefore, the safety problem caused by shallow biogas should be taken into consideration seriously and avoided in the pre-construction stage. A typical underwater metro tunnel, Hangzhou Metro Line 6, is introduced in this study to suggest the proper approach to deal with the biogas problem during the construction process. The generation mechanism of shallow biogas is clarified and the process of identifying biogas risk during strata exploration is also discussed. A risk identification and control system for shield tunneling through biogas strata is proposed to mitigate the potential dangers of shallow biogas during the construction process. This study provides actual construction experience and countermeasures for other similar metro tunnel projects that encounter biogas strata to diminish the potential risks and avoid severe accidents.

Improvements on Technologies of Shield Tunnel Construction in Sandy Soil

2012 ◽  
Vol 226-228 ◽  
pp. 957-962
Author(s):  
Zhan Wang ◽  
Guan Shui Liu ◽  
Fan Long ◽  
Fei Zheng
Keyword(s):  
Sandy Soil ◽  
Ventilation System ◽  
Cooling Water ◽  
Conveyor Belt ◽  
Shield Tunnel ◽  
Circulation System ◽  
Tunnel Construction ◽  
Shield Tunneling ◽  
Tunneling Method ◽  
Water Circulation System

With development of underground space, the shield tunneling method have been widely adopted due to its unique advantages. However, there is still many technical and theoretical problems need to be improved in the construction. Based on the project of metro line 1 in Hangzhou city, typical problems of shield tunnel construction in sandy soil are analyzed. The problems of ventilation system, cooling water circulation system, foaming system and conveyor belt system are represented in detail. Controlling of proper propelling force is optimized by parameter sensibility analysis. Aiming at these problems, improvement measures are proposed and successfully used in the project. The improvements can be taken for reference in similar projects.

The Major Problems and Countermeasures on the Shield Machine Tunneling in the Hard Rock Stratum

2011 ◽  
Vol 105-107 ◽  
pp. 1438-1442 ◽  
Author(s):  
Kai Rong Hong ◽  
Ren Hua Yang
Keyword(s):  
Hard Rock ◽  
Rapid Development ◽  
Soft Rock ◽  
Shield Tunnel ◽  
Tunnel Construction ◽  
Construction Technology ◽  
Construction Costs ◽  
Shield Tunneling ◽  
Rock Stratum ◽  
Tunneling Method

With the rapid development of urban construction, the shield construction technology has been greatly developed. Shield tunneling method generally adapts to relatively uniform soil, soft rock and sand rock strata, and the shield tunnel construction has been more mature for the homogeneous strata. However, for the soft and hard interbedded strata, how to solve the problems of breaking the hard rock, increasing the tunneling efficiency and reducing the construction costs, are difficult problems in the shield tunnel construction. In this paper, based on a great deal of theoretical analyses and engineering practices, the effective methods of improving the efficiency of tunneling, reducing cutter wearing and decreasing the construction costs in the process of the shield tunneling construction in hard rock and gravel layer are proposed.

Transience and Tunnel Esperanto: A study of multilingualism, work and relationship-building on a tunnel mining project

2020 ◽  
Vol 2020 (264) ◽  
pp. 163-186
Author(s):  
Kamilla Kraft
Keyword(s):  
Work Organization ◽  
Relationship Building ◽  
Tunnel Construction ◽  
Daily Work ◽  
Time Space ◽  
Mining Project ◽  
Language And Communication ◽  
Metro Tunnel ◽  
Staff Relations ◽  
Discursive Constructions

AbstractThis paper investigates multilingualism as language and communication discourses and practices in a Copenhagen metro tunnel construction project. This project is characterized by transience: continual time-space changes of work organization and staff relations combined. In this scenario, a highly international and multilingual staff composition puts focus on language and communication. Based on interviews with managers and workers from one of the project’s contractors, as well as observations of daily work in the tunnels, the analysis demonstrates participants’ discursive constructions of language and communication, sometimes linking these concepts to work, sometimes to relationship-building. I argue that these constructions are closely interlinked with the workplace’s transient status and conditions, and draw out how they have empowering as well as exploitative implications for the workers.

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