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结合偏压隧道围岩压力的理论公式,分析偏压隧道围岩压力和破坏范围与地表倾角、埋深和围岩条件的关系.结果表明:地表倾角越大,则深埋侧的破坏范围越大,而浅埋侧的破坏范围减小;偏压程度随着埋深的增大而减小;破坏范围随着摩擦角的增大而减小,偏压程度随着计算摩擦角的增大而减小,提高软弱围岩的力学参数可以有效地改善隧道的偏压情况,而对于质量较好的围岩,改善效果并不明显.
Combined with the theoretical formula of the surrounding rock pressure of the biased tunnel, the relationship between the surrounding rock pressure and failure range of the biased tunnel and the inclination of the earth’s surface and the buried depth of the surrounding rock are analyzed. The results show that the larger the inclination of the earth’s surface, The damage extent decreases with the increase of burial depth; the damage extent decreases with the increase of friction angle, and the degree of bias increases with the increase of friction angle However, reducing and raising the mechanical parameters of the weak surrounding rock can effectively improve the biasing conditions of the tunnel, and for the surrounding rock with better quality, the improvement effect is not obvious.