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Numerical Analysis of the Influence of Tunneling Blasting on the Existing Tunnel

Author: ZhongJianHui
Tutor: BiJiHong
School: Tianjin University
Course: Bridge and Tunnel Engineering
Keywords: Finite Element Method Tunnel Lining Country rock Blasting vibration
CLC: U451
Type: Master's thesis
Year: 2005
Downloads: 458
Quote: 10
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Abstract


New tunnel blasting excavation may cause adjacent existing tunnel injury risk in the case of small pitch with both tunnel blasting excavation of the new tunnel , blasting seismic waves generated by the excavation would endanger the existing tunnel surrounding rock and lining the safety and stability of the structure . The paper uses the basic principle of the dynamic finite element method , the numerical simulation analysis using Ansys software to nearby blasting tunnel . Analysis of the calculation results to obtain a series of useful rules and conclusions , reference and basis for the actual construction and design . This article first study adjacent to the bursting of the value of research on the impact of the existing tunnel , the research status at home and abroad , old and new research methods than on detailed generalization and elaboration . Detailed description then made ??on the application of the finite element method in this topic , which focused on the dynamic finite element calculation and analysis methods , the processing of nonlinear analysis and solving , blasting vibration simulation , boundary conditions and unit type and meshing a range of issues were discussed , and ANSYS software to solve these problems . By consulting the relevant literature , a systematic introduction to the theory of the destruction of rock blasting and stress wave theory of soil the antiknock structure in general computing , and ANSYS software to simulate how the blasting vibration personal views and approach . Failure theory , the theory of stress wave in rock blasting and dynamic finite element method based on the transient dynamics analysis by ANSYS , different operator routine into the nearby blasting of the numerical simulation analysis of the impact of the existing tunnel , which is considered separately different spacing of the tunnel , the different rock types , different shape of the existing tunnel , the tunnel depth , and the relative position of the two tunnels different , whatever . Major analysis of the existing tunnel lining and the surrounding rock under the influence of neighboring blasting vibration velocity , stress and lining deformation , compare and analyze various situations calculation results obtained on both tunnel blasting by neighboring the rules and characteristics .

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CLC: > Transportation > Road transport > Tunnel project > Tunnel structure theory
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