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Study on the Seasonal Frozen Roadbed Temperature and Deformation of Kangding Section of Sichuan-Tibet Highway

Author: LiuShiPing
Tutor: XieYongLi
School: Chang'an University
Course: Geotechnical Engineering
Keywords: Seasonal frozen Roadbed temperature field Solar radiation Thermal conductivity Specific heat Route towards
CLC: U416.1
Type: Master's thesis
Year: 2011
Downloads: 65
Quote: 0
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Abstract


Thesis relying Tibet line kangding - East Russia Los paragraph Highway renovation and expansion project , considering the route towards the wind speed , radiation , topography and other factors , the measured temperature field of the cross section roadbed and pavement deformation . Analysis of the specific impact of the natural surface , roadbed midline , the foot of the slope variation of the ground temperature and the road , the route towards , altitude , topography , the roadbed temperature field distribution measured data . Pavement deformation analysis , to verify the relationship between seasonal frozen soil area pavement deformation and subgrade temperature field . Zero fill or excavation sections seasonal frost heave and thaw constitute the main part of the road surface deformation . Field Sampling indoor test, obtained in the case of certain moisture content and dry density of the heat exchange coefficient . Affect the the roadbed temperature field of the boundary conditions in the finite element calculation analysis , given the rate of 30.03 ° north latitude regions of different slope , different towards roadbed slope accepted theoretical formula for the amount of solar radiation . Establish ADINA finite element model , focus on analysis of the distribution pattern of a typical embankment temperature field , and field measurement of temperature field for mutual authentication , confirm the modeling and the parameters of reasonable . Toward roadbed temperature field asymmetric distribution of characteristics , and pointed out that this asymmetric distribution of the phenomenon of the roadbed shallow soil temperature field has the characteristics of winter and summer weak . Pointed roadbed in seasonal frozen soil areas most likely to produce the seasonal the frost heave financial Shen 's weak position when the route towards the east-west on the right shoulder . Field measurement and modeling analysis has been the largest seasonal frozen soil depth of Kangding region under different annual average temperature conditions . The results of this research can provide a reference for future Western Sichuan Plateau Kangding season permafrost roadbed design .

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CLC: > Transportation > Road transport > Road works > Roadbed, pavement engineering > Subgrade
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