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Model Test and Particle Flow Numerical Simulation of Anchorage Mechanism

Author: ChenDeWen
Tutor: PanWeiZongï¼›SongXiuGuang
School: Shandong University
Course: Hydraulic Structure Engineering
Keywords: Anchoring mechanism Model test Numerical Simulation Particle flow
CLC: TU476
Type: Master's thesis
Year: 2008
Downloads: 263
Quote: 1
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Abstract


Prestressed Anchoring in rock reinforcement in all areas has been widely used, and has achieved tremendous economic and social benefits. But now , for the effects of prestressed anchor theoretical and experimental research is still confined to the continuum mechanics and macro- level test , simply can not reveal the essence anchoring effect on meso mechanism . Even in a large number of macroscopic tests, test conditions due to the restrictions , it does not comprehensively analyzes and studies the entire cross section of anchoring section stress and deformation . In this paper, the indoor model test and particle flow (PFC 2D ) numerical analysis methods , from the point of view of Anchorage System in meso static loads of stress and displacement fields for analysis , mainly to obtain the following aspects research : ( 1 ) the use of model tests , made ??by pre- laid anchor body measuring strain measuring element , grouting , rock and other strain , and then analyzes a single bolt in the static loads with prestressed increasing the axial force along the rod as well as the distribution of the interface shear stress variation . ( 2 ) the use of digital photography without punctuation deformation measurements , analyzes rod bolt body and the surrounding rock displacement and shear stress field distribution . ( 3 ) the use of granular flow theory to establish a reasonable computer simulation model, the use and development of PFC 2D particle flow numerical analysis software system for anchoring loads in static stress, strain law , load - displacement characteristics , failure mode and other numerical simulation , and the computational results are compared with the indoor model test analysis , and further understanding of the mechanism and prestressed anchor anchorage failure mode . Finally, the need for further study in the future direction of research questions and suggestions .

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