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Tunnel construction on adjacent expand basic bridge structure

Author: WangShuYing
Tutor: YangJunSheng
School: Central South University
Course: Bridge and Tunnel Engineering
Keywords: Tunnel Bridge Expansion of basic Damage evaluation
CLC: U441
Type: Master's thesis
Year: 2007
Downloads: 163
Quote: 7
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Abstract


Brought a lot of the development of urban tunnel tunnel bridge intersecting issues tunnel construction will cause the surface to produce a shift , affecting the status of existing bridges . The impact of the research tunnel construction on the bridge state , to take effective measures to reduce the impact of great significance to ensure the smooth construction of the the bridge normal operation and tunnels . This article in to Jinshazhou Tunnel wear the Guangfo overpass this project relying analysis of the impact of tunnel construction on adjacent expand basic bridge structure , research Charpy continuous beam and the lower part of the structure of the surface displacement and deformation of the reaction , the main : 1, analysis of tunnel construction caused surface subsidence mechanism , discussed Peck and its related formulas , on behalf of radius such way to select the value of the ground loss and groove width ; 3 , analysis of the form of the bridge damage , including surface subsidence, horizontal displacement , tilt , curvature and horizontal deformation of the bridge structure ; 4 , respectively of the Charpy the bearing settlement and adjacent bearing differential settlement , continuous normal section bearing capacity of the beam , inclined section bearing capacity , normal section crack resistance the pier top horizontal displacement of diagonal cracking performance and deflection , and the lower part of the structure , the base eccentricity and stability of state , the establishment of the tunnel construction of bridge damage evaluation system ; using Midas / Civil software to analyze the impact of surface movement and deformation of the continuous beam and the lower part of the structure of each state , to draw normal section crack resistance of the surface subsidence is most sensitive , the most sensitive of the pier horizontal displacement of surface tilt and horizontal displacement , then fixed bridges damage evaluation system ; 6 , Jinshazhou tunnel beneath Guangfo overpass project analysis, surface subsidence and to corresponding strata loss rate of the control value , and provide a reference for the tunnel construction .

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CLC: > Transportation > Road transport > Bridges and Culverts > Structural principles, structural mechanics
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