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The Destruction Forecast and Reinforcement Decision-Making of Vertical Shaft in Deep Topsoil

Author: ShenMingLiang
Tutor: FuHouLi
School: Shandong University of Science and Technology
Course: Geotechnical Engineering
Keywords: Shaft Numerical Simulation Hydrophobic destruction Partial load Instability failure
CLC: TD262
Type: Master's thesis
Year: 2008
Downloads: 61
Quote: 0
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Abstract


In this paper, theoretical analysis and numerical simulation of a combination of research methods, deep topsoil under complex loads of instability and destruction Shaft research. Analysis of complex loading conditions influencing factors and wellbore damage wall failure mechanism , the force on the wall a detailed analysis to derive wall in a variety of loads theoretical formula proposed for the reinforcement in deep alluvium concrete wall of elastoplastic constitutive model and failure criteria . Using common software ANSYS finite element numerical model to establish a number , including the gravity stress field model , hydrophobic damage model , by the local load instability model, and the corresponding conclusions were drawn . For borehole gravity stress field numerical model to analyze the building before and after weight wellbore stress field changes , surface displacement variation analysis of the various strata of the stress-strain conditions . Wellbore damage model by weight of a hydrophobic , horizontal ground pressure and increase with time additional force hydrophobic interaction analyzes hydrophobic wall with additional force increases and the final destruction of the process. And thus on the wall destruction of the time, location, and development was predicted, analyzed the wall stress and strain at failure . When the local load on the shaft by a numerical model for the nonlinear buckling numerical analysis, numerical analysis was also carried out plastic . Shaft obtained by local buckling load for the first time when the load size and load shaft completely destroyed when the size of the borehole instability simultaneous analysis of the stress and strain distribution and plastic zone development . By and field damage, test data comparison , the numerical model is compared with the actual situation of the wellbore damage prediction , governance has some theoretical significance .

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CLC: > Industrial Technology > Mining Engineering > Mine design and construction > Underground construction > The wellbore Design and Construction
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