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Dynamic Simulation of the Construction Process of Twin Arched-tunnel and Monitoring Measurement

Author: ZhangBingBing
Tutor: ZhangKaiYin
School: Wuhan University of Technology
Course: Engineering Mechanics
Keywords: Monitoring and control Arch Tunnels Finite Element Stress field Displacement field Country rock Construction methods
CLC: U455.4
Type: Master's thesis
Year: 2005
Downloads: 309
Quote: 1
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Abstract


This article relying Yinjialin rock tunnel project, combined with the characteristics of the current domestic and international couplet arch tunnel as well as the current situation of double-arch tunnel construction methods, the application of the finite element software ANSYS the couplet arch guide holes in the tunnel excavation plane finite element analysis, step-by-step The excavation process space finite element analysis, and combined tunnel informational construction monitoring and measuring technology and research tools, the mechanical behavior of the entire construction of the double-arched tunnel. First established Yinjialin Rock Tunnel flat-screen model, the simulation used DP (Drucker-Prager) yield the basic standards and tunnel excavation method - Reverse stress release method to tunnel plane brief steps. Calculated to understand the impact on the surrounding rock displacement field and stress field in the pilot tunnel excavation, to determine the location of the monitoring and control work is critical to the danger point, and get some useful conclusions for the whole cross-section of the tunnel the main tunnel excavation data preparation. In engineering practice, the the arch tunnel excavation is actually a space problem. Therefore, in the fourth chapter of the tunnel excavation process, the article is a 3D simulation through space model construction process in the spatial arrangements and simulation analysis of the effects of the arched tunnel excavation space around the hole of each other , especially couplet arch tunnel core structure - wall deformation and stability further explore the contours around the hole in the wall longitudinal stress excavation Wall curve analysis. Article Yinjialin rock tunnel construction process design and implementation of measurement based on research from the measurement principle, measurement, design and measurement. Papers obtained by the actual construction monitoring site data, in accordance with existing experience, as well as the stability of the finite element analysis of the feedback obtained the tunnel full section excavation surrounding rock deformation and the force law. By comprehensive analysis of the the K3 657 sections in the wall pressure cell data, confirm the stability of the surrounding rock and tunnel structure of the different construction stages, and to determine the the lining structures more reasonable supporting opportunity. Finally, the article summarizes the feasibility and significance of the finite element calculation and empirical methods in the construction of Tunnel Construction. Combined Yinjialin rock double-arch tunnel engineering analysis and finite element simulation results of the data analysis, the authors point out that the paper analyzes several issues and put forward their own views, and on tunnel monitoring monitoring technology improvements. The results of this thesis provide effective guidance for the construction of on-site construction of Yinjialin rock tunnel project.

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CLC: > Transportation > Road transport > Tunnel project > Tunnel construction > Construction methods
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