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The railway slope stability analysis considering soil creep

Author: GuoJianGuang
Tutor: ZhangJiaSheng
School: Central South University
Course: Geotechnical Engineering
Keywords: Railway Engineering Engineering Stability Analysis Creep deformation Value taking into account different
CLC: U213.13
Type: Master's thesis
Year: 2009
Downloads: 96
Quote: 0
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Abstract


A large number of engineering research and practical experience shows that the slope deformation and failure is a long-term process , it is necessary to conduct in-depth research for the soil creep slope stability analysis method . In this paper, Ganzhou-Longyan railway engineering background , considering soil on the basis of creep deformation , creep constitutive model parameters by the inversion of the measured data using numerical methods to calculate the railway slope stability considering creep analysis . This paper surveys the existing railway slope and slope engineering research trends through literature research , field measurement and numerical simulation analysis , analysis of the timeliness of the railway slope deformation , pointing out that the important consideration of creep railway slope engineering significance. Slope creep the Mechanism and creep constitutive model , determine rheological constitutive model parameters improved method of least squares , Burgers rheological model is recommended to consider the value of the creep constitutive equation . On the basis of the analysis of the extensive literature research and domestic and international engineering instance , the safety factor K ≥ 1.30 as consideration of creep railway slope safety factor . High slope engineering Ganzhou-Longyan Railway K65 731 , set up the components of the deformation and stress observations , the long-term monitoring of soil creep deformation . The monitoring data show that the creep curves characteristic of deep soil displacement reaction deformation characteristics of the initial creep stage and the steady creep stage . Based on the X - direction of the slope of the ZK01 monitoring point located on the top surface of the slope displacement creep monitoring data , using an improved method of least squares fit of the experimental data , Burgers rheological model parameters obtained by curve fitting . Numerical methods calculated K65 731 railway slope stability analysis , numerical results show that K65 731 slope deformation after 2 years of development , soil creep deformation has been gradual convergence anchor cable tension has stabilized , The safety factor is gradually stabilized at 1.39 . Integrated all aspects of indicators suggest that the K65 731 slope has been basically stable , the safety factor to achieve the requirements . Engineering studies and theoretical analysis shows that it is necessary to consider the soil creep , slope safety assessment requires the introduction of creep factors railway slope engineering .

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CLC: > Transportation > Rail transport > Railway Line Project > Line constructed > Subgrade > Slope
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