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.

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

RECENT DEVELOPMENTS IN THE NUMERICAL SIMULATION OF SHALLOW WATER EQUATIONS II: TEMPORAL DISCRETIZATION

1994 ◽  
Vol 04 (04) ◽  
pp. 533-556 ◽  
Author(s):  
V. AGOSHKOV ◽  
E. OVCHINNIKOV ◽  
A. QUARTERONI ◽  
F. SALERI
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Finite Difference ◽  
Shallow Water ◽  
Shallow Water Equations ◽  
Numerical Results ◽  
Finite Difference Approximation ◽  
Difference Approximation ◽  
Recent Developments ◽  
Numerical Approaches

This paper deals with time-advancing schemes for shallow water equations. We review some of the existing numerical approaches, propose new schemes and investigate their stability. We present numerical results obtained using the time-advancing schemes proposed, with finite element and finite difference approximation in space variables.

Analysis of the Mechanical Property of Collapse in Shallow-Buried Loess Tunnel under Unsymmetrical Pressure

2013 ◽  
Vol 645 ◽  
pp. 426-429 ◽  
Author(s):  
Xiao Hui Xue ◽  
Zhong Ming Su
Keyword(s):  
Mechanical Properties ◽  
Numerical Simulation ◽  
Mechanical Property ◽  
Finite Element ◽  
Collapse Mechanism ◽  
Tunnel Excavation ◽  
Finite Element Numerical Simulation ◽  
Tunnel Collapse ◽  
Primary Support

Based on selecting a tunnel collapse under typical conditions of the shallow-buried terrain under unsymmetrical pressure, analyzing the monitoring measurement date, using the software of finite element numerical simulation, the paper simulates the tunnel excavation in lengthwise, deduces the change laws of stress in primary support, the mechanical properties and the collapse mechanism.

Study on Construction of Long Span and Soft Rock Tunnel with Numerical Simulation

2013 ◽  
Vol 438-439 ◽  
pp. 964-967
Author(s):  
Bin Zhu ◽  
Xiao Jing Shi
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Soft Rock ◽  
Tunnel Excavation ◽  
Finite Element Program ◽  
Factors Affecting ◽  
Long Span ◽  
Element Program ◽  
Main Factors ◽  
Rock Tunnel

With characteristics of the long span and soft rock tunnel, this paper analyzes the main factors affecting tunnel stable on the basis of the way of tunnel excavation method. The large finite element program is used in research of a tunnel, with a numerical simulation of two different way, top heading and bench method and double side drift method. From the result of stress field and displacement field of the tunnel , some useful conclusion are obtained, that double side drift method is appropriate for this kind of soft rock tunnel.

Numerical Simulation Analysis of the Construction Mechanics in the Process of Tunnel Excavation

2011 ◽  
Vol 71-78 ◽  
pp. 1590-1595 ◽  
Author(s):  
Dong Bo Li ◽  
Dong Zhao ◽  
Chun Yan Liu
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Simulation Analysis ◽  
Tunnel Excavation ◽  
Finite Element Software ◽  
Soil Displacement ◽  
Excavation Process ◽  
Soil Stress ◽  
Construction Mechanics

Based on the Wanshan tunnel project located between Hefei and Fuzhou, the paper numerically simulates the excavation process of six-step CD method using the technology of element birth and death of finite element software ANSYS. And the soil stress, soil displacement and deformation are analyzed, which can provided a reference for similar engineering.

Numerical Simulation of Tire Sliding Events Involving Impacts with Holes and Bumps

1986 ◽  
Vol 14 (2) ◽  
pp. 125-136 ◽  
Author(s):  
Y. Nakajima ◽  
J. Padovan
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Finite Element Simulation ◽  
Full Range ◽  
Arbitrary Geometry ◽  
Operating Environments ◽  
Element Simulation ◽  
Simulation Scheme

Abstract This paper extends the finite element simulation scheme to handle the problem of tires undergoing sliding (skidding) impact into obstructions. Since the inertial characteristics are handled by the algorithm developed, the full range of operating environments can be accommodated. This includes the treatment of impacts with holes and bumps of arbitrary geometry.

The study of the elastic deformation of a flexible wheel by a cam wave generator

2020 ◽  
Vol 65 (1) ◽  
pp. 51-58
Author(s):  
Sava Ianici
Keyword(s):  
Numerical Simulation ◽  
Finite Element Method ◽  
Finite Element ◽  
Elastic Deformation ◽  
Theoretical Study ◽  
Elastic Field ◽  
The Finite Element Method ◽  
Elastic Deformations ◽  
Wave Generator ◽  
Two Stages

The paper presents the results of research on the study of the elastic deformation of a flexible wheel from a double harmonic transmission, under the action of a cam wave generator. Knowing exactly how the flexible wheel is deformed is important in correctly establishing the geometric parameters of the wheels teeth, allowing a better understanding and appreciation of the specific conditions of harmonic gearings in the two stages of the transmission. The veracity of the results of this theoretical study on the calculation of elastic deformations and displacements of points located on the average fiber of the flexible wheel was subsequently verified and confirmed by numerical simulation of the flexible wheel, in the elastic field, using the finite element method from SolidWorks Simulation.

Sign in / Sign up

Export Citation Format

Share Document