【摘 要】
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In view of the limitation of the vertical earth pressure calculation method of high fill cut-and-cover tunnel on the existing code,using numerical simulation method to analyze the impacts of the width
【机 构】
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Lanzhou Jiaotong University
论文部分内容阅读
In view of the limitation of the vertical earth pressure calculation method of high fill cut-and-cover tunnel on the existing code,using numerical simulation method to analyze the impacts of the width,section shape,elasticity modulus,slope angle and the ratio of groove width to cut-and-cover tunnel width on the vertical earth pressure on the top of cut-and-cover tunnel and put forward the formula for calculating the vertical earth pressure of high fill cut-and-cover tunnel.The results show that the width of the different influence coefficient k2 nonlinearly increases with the increase of filling height,and the width larger,the k2 is smaller.Influence coefficient of elasticity modulus k1 and the coupling coefficient k3 of slope angle and the ratio of groove width to cut-and-cover tunnel width decreases nonlinearly.The section shape coefficient k0 can be ignored.Then,two calculation case of high fill railway cut-and-cover tunnel are analyzed,and the results obtained by this formula are compared with those of numerical simulation to validate the correctness.
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