Based on a shallow buried unsymmetrically loaded tunnel of Chongqing highway,a three-dimensional solid model was established to analyze how the three material parameters of rock and soil mass,i.e.cohesion,internal friction angle,and elastic modulus,influence the deformation characteristics of tunnel under different working conditions.The result shows that,the tunnel displacement generally presents attenuation law of exponential decreasing function with the increase of geotechnical material parameters.There exists a threshold value for the sensitivity of three material parameters to the influence on the displacement of shallow buried unsymmetrically loaded tunnel,respectively:cohesion c=70 kPa,internal friction angle φ=20°,elastic modulus E=200 MPa.Through contrast analysis of the calculated result from the numerical simulation of solid engineering and the result from the measurement in the field,the reliability of the calculated result from the numerical simulation is verified.
关键词
隧道/浅埋偏压/变形特征/岩土材料参数/影响因素
Key words
tunnel/shallow buried unsymmetrically loaded/deformation characteristics/geotechnical material parameters/influencing factors
维普
万方数据