Application of CCD Photogrammetry System to Measurement of Tunnel Wall Movement due to Parallel Tunnel Excavation

2017 ◽  
pp. 281-284 ◽  
Author(s):  
Y. Ohnishi ◽  
H. Ohtsu ◽  
S. Nishiyama ◽  
N. Okada ◽  
T. Seya ◽  
...  
Keyword(s):  
Tunnel Wall ◽  
Tunnel Excavation ◽  
Wall Movement ◽  
Parallel Tunnel

Impact and Safety Assessment of a Double-Tube Parallel Tunnel Excavation on Adjacent Pipelines

2014 ◽  
Vol 889-890 ◽  
pp. 1421-1424
Author(s):  
Dong Liang Guo ◽  
De Shen Zhao
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Finite Difference ◽  
Safety Assessment ◽  
Construction Safety ◽  
Tunnel Excavation ◽  
Project Construction ◽  
Parallel Tunnel

The interaction of a double-tube parallel tunnel excavation will have a larger additional shearing action on the adjacent pipelines. This paper, taking 202 Section of Line 2 on Dalian Metro as the background, uses the finite difference software to establish 3-D finite element analysismodel to simulate the double-tube parallel tunnel excavation. Deformation of adjacent pipelines is analyzed specially by numerical simulation of tunnel excavation and also the safety of the pipelines is forecasted. The conclusions and advices are important to design and guide the actual project construction safety.

Study on In Situ Monitoring of the Surrounding Rock Pressure of the Shallow Large-Span Tunnel in the Tunnel Construction Process

2011 ◽  
Vol 413 ◽  
pp. 454-458
Author(s):  
Xin Zhi Li ◽  
Shu Cai Li ◽  
Ying Yong Li ◽  
Shu Chen Li
Keyword(s):  
Rock Pressure ◽  
Surrounding Rock ◽  
In Situ Monitoring ◽  
Tunnel Engineering ◽  
Tunnel Face ◽  
Tunnel Excavation ◽  
Large Span ◽  
Parallel Tunnel ◽  
Surrounding Rock Pressure

The surrounding rock pressure which was determined effectively through in-situ monitoring was the important parametric of the tunnel engineering design.According to in-situ monitoring of the surrounding rock pressure in the relied engineering . The adjustment and distribution characteristics of surrounding rock pressure of the shallow large-span tunnel with three-level seven-step parallel tunnel excavation was studied, the results showed that the arch and sides of the tunnel arch foot were the key parts which concentrated the surrounding rock pressure. The adjustment and distribution of surrounding rock pressure had not obvious relationships with tunnel face distance. Finally, the composite factors that impacted monitoring results of the surrounding rock pressure was analysed. The results had great significance on the development and perfection of the surrounding rock pressure theory in shallow large-span tunnel.

Analysis of Effects of a Double-Tube Parallel Tunnel Excavation on Underground Pipelines

2013 ◽  
Vol 395-396 ◽  
pp. 477-480
Author(s):  
Dong Liang Guo ◽  
De Shen Zhao
Keyword(s):  
Material Properties ◽  
Its Region ◽  
Underground Pipeline ◽  
Analysis Model ◽  
Element Analysis ◽  
Tunnel Excavation ◽  
Finite Element Analysis Model ◽  
Underground Pipelines ◽  
Deformation Law ◽  
Parallel Tunnel

The interaction of a double-tube parallel tunnel excavation will greatly influence on underground pipeline of its region. This paper, taking Dalian Spring Street subway station as the background, uses the finite difference software to establish 3-D finite element analysis model to simulate the effects of tunnel excavation on underground pipeline, in which different embedment, material properties and diameters are considered. By analyzing of the settlement and deformation law of pipeline, the least affected pipeline conditions are drawn to provide corresponding guidance for subsequent underground projects.

Analysis Based on FLAC3D of Surface Subsidence Caused by a Double-Tube Parallel Tunnel Excavation

2013 ◽  
Vol 395-396 ◽  
pp. 443-446
Author(s):  
Dong Liang Guo ◽  
De Shen Zhao
Keyword(s):  
Numerical Simulation ◽  
Finite Difference ◽  
Land Subsidence ◽  
Surface Subsidence ◽  
Ground Subsidence ◽  
Tunnel Construction ◽  
Tunnel Excavation ◽  
Spring Street ◽  
Practical Engineering ◽  
Parallel Tunnel

In the double-tube parallel tunnel excavation cross-range, it will result in a larger superimposed surface subsidence, and even induce land subsidence to cause the accident. This paper uses the finite difference FLAC3D software to have a numerical simulation on double-tube parallel tunnel excavation of Dalian Spring Street Station. The land subsidence law of a double-tube parallel tunnel excavation which is obtained by analyzing the vertical and longitudinal settlement curve can predictable similar ground subsidence caused by tunnel construction and guide the safety construction of practical engineering

Numerical Analysis of New Shield Tunnel on Mechanical Behavior of Existing Parallel Tunnel

2012 ◽  
Vol 204-208 ◽  
pp. 1429-1434
Author(s):  
Xue Feng Li ◽  
Shou Ji Du ◽  
Ding Feng Zhang
Keyword(s):  
Numerical Analysis ◽  
Mechanical Behavior ◽  
Safety Concern ◽  
Bending Moment ◽  
Soil Mass ◽  
Shield Tunnel ◽  
Configuration Model ◽  
Tunnel Excavation ◽  
Parallel Tunnel ◽  
Plastic Zones

A three-dimensional numerical analysis was conducted to investigate the effects of a new shield tunnel excavation on the internal forces and deformation induced in an existing parallel tunnel and soil plastic zones around it. Special attention was paid to the influence of relative positions between two tunnels. The results of the analysis show that the relative positions affect the mechanical behavior of the existing parallel tunnel and the soil mass behavior around it. When a new tunnel is driven below or above an existing parallel tunnel, important increments are induced in deformation and bending moment in the lining of existing tunnel at its crown and springline, compared to that of induced by new tunnel excavation in horizontally parallel to the existing one. The plastic zones around tunnels also extend larger when tunnels are driven in vertically parallel than they are in horizontally parallel. For the safety concern, it is concluded that horizontally parallel configuration model between two tunnels should be adopted in practice.

Sign in / Sign up

Export Citation Format

Share Document