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Application of Block Theory in the Analysis of Surrounding Rock Mass Stability in Arch-Tunnel of Expressway

Author: HuaiChao
Tutor: SuShengRui
School: Chang'an University
Course: Geological Engineering
Keywords: Highway Arch tunnel Block theory Stability Evaluation Software Development
CLC: U451.2
Type: Master's thesis
Year: 2005
Downloads: 337
Quote: 12
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Abstract


In the tunnel construction process, due to the natural rock mass stress state destroyed, causing the tunnel surrounding rock mass unloading rebound and stress redistribution , when this rebound stress and redistribution can withstand stress exceeds the range of rock will cause some blocks along the structural surface instability , which causes instability of rock mass destruction pose a serious threat to the construction , directly affecting the safety and progress of the construction . Block theory (Block Theory) is a recently developed and perfected a method of stability analysis of rock engineering , along with scholars in-depth knowledge and research , the research approach has been more mature , growing block theory has been widely accepted. In this paper, Yunnan Si ( Mao ) - Small ( mengyang ) Motorway Man breaks the 4th arch tunnel for the project entities to draw at the construction site of the geological sketch map ( including roof , wall structure surface exhibited ) , based on build tunnels and structural plane entity model , the application by the vector operation and free face rock tunnel structure composed of block surface stability analysis . All the results of this calculation are in the spatial structure of surface location has been determined obtained under the premise that all these results are determined value . In order to make this analysis method can be easily applied scientific research, production practice , the authors carried out under the Windows environment engineering analysis software. In the software development process to Matlab as a platform, all programs are written using Matlab . The software provides a concise input and output interface, convenient data input , calculation and analysis, graphical analysis results ( animation, zoom, rotate ) output. Makes arch highway tunnel surrounding rock stability analysis can be completed within a very short time . Papers will also be calculated with this software tunnel construction monitoring measurement results were analyzed , thus proving the calculation results are reliable . The method is able to draw a deterministic block stability analysis results, and the development of complex software can replace manual labor , and has a very high accuracy rate , for the highway arch tunnel surrounding rock stability analysis provides a accurate and efficient way .

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CLC: > Transportation > Road transport > Tunnel project > Tunnel structure theory > Theory of tunnel surrounding rock
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