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针对大连地铁促春段横通隧道建设工程,采用有限差分软件FLAC~(3D)对0°~90°不同相交角的斜T型分叉岔隧道进行了数值模拟,通过分析变形数据、变形云图、变形矢量图以及实测数据的分析对比,得出相交区围岩变形规律.模拟结果表明:横通道的建设造成交叉区的围岩2次扰动,交叉角为15°时围岩扰动最大;交叉角度在45°~90°之间时由交叉角度造成的围岩变形量并不明显而交叉角度在15°~45°之间很明显;斜隧道开挖造成的交叉区围岩的2次变形量,小于主隧道开挖时造成的围岩变形量.
Aiming at the cross-tunnel construction project of the spring section of Dalian Metro, the finite difference software FLAC 3D was used to simulate the T-bifurcated fork tunnel with different crossing angles of 0 ° ~ 90 °. By analyzing the deformation data, , The deformation vector diagram and the measured data, the deformation law of the surrounding rock in the intersecting area is obtained.The simulation results show that the construction of transverse passage causes the secondary disturbance of the surrounding rock in the crossing area and the disturbance of the surrounding rock is the largest when the crossing angle is 15 °; When the angle is between 45 ° and 90 °, the deformation of the surrounding rock caused by the crossing angle is not obvious and the crossing angle is obvious between 15 ° and 45 °. The second deformation of the surrounding rock caused by the oblique tunnel excavation The amount of less than the main tunnel excavation caused by the deformation of surrounding rock.