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为简化马蹄形隧道衬砌水压力及渗透量的计算方法,基于轴对称解析解与等效周长法,求得不同衬砌渗透系数、注浆半径和衬砌厚度的衬砌水压力与渗透量,并与FLAC3D数值模拟同等条件下相应工况的衬砌水压力与渗透量进行对比.研究表明:轴对称解析解简化马蹄形断面计算隧道衬砌水压力及渗透量的结果与数值模拟结果误差为7.7%,可以将其应用于工程中;3种工况下,最不利位置均位于拱腰;衬砌渗透系数减小与衬砌厚度增大,衬砌安全系数均在增大,而注浆半径的增大对衬砌安全系数无明显影响;衬砌渗透系数减小,衬砌水压力增大,渗透量减小,注浆半径增大与衬砌厚度增大,衬砌水压力与渗透量均减小.
In order to simplify the calculation of water pressure and permeability of horseshoe tunnel lining, the pressure and permeability of lining water with different lining permeability coefficient, grouting radius and lining thickness were calculated based on axisymmetric analytic solution and equivalent perimeter method. The results were compared with FLAC3D numerical simulation The results show that the axial symmetry analytical solution simplified the horseshoe cross section to calculate the water pressure and the permeability of the tunnel lining, and the result of the numerical simulation is 7.7%, which can be applied to In the three kinds of working conditions, the most unfavorable position is in the arch waist. The decrease of the permeability coefficient of the lining and the increase of the lining thickness increase the safety factor of the lining, while the increase of the grouting radius has no obvious influence on the lining safety factor The lining permeability coefficient decreases, the lining water pressure increases, the infiltration quantity decreases, the grouting radius increases and the lining thickness increases, and the lining water pressure and permeability decrease.