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本文导得了在轴向力作用下地下结构柔性墙轴挠曲线的微分方程,并给出墙轴水平位移、转角、弯矩及剪力间的微分关系及其无量纲解。文中指出轴向力对柔性墙受力变形的影响程度是与墙轴的压应变、墙身材料和岩土的弹性性质以及墙身横截面的尺寸有关。这些因素可综合归纳为两个参数α及γ(或β),而与直墙的高度无关。根据轴向力V_c与其临界荷载V_(cr)间不同的比值,对轴向力影响的具体分析认为:在松软地层中需要考虑这一影响,而在坚硬岩层中,对上部拱圈内力有显著影响的墙顶水平位移和转角,应按本文所给公式进行修正。
In this paper, we derive the differential equation of flexure axis of flexible wall of underground structure under the action of axial force, and give the differential relationship between horizontal displacement, corner, moment and shear of wall axis and its dimensionless solution. The paper points out that the influence of axial force on the deformation of flexible wall is related to the axial compressive strain, the elastic properties of wall material and the geotechnical properties, and the size of the wall cross-section. These factors can be generalized to two parameters α and γ (or β), regardless of the height of the straight wall. According to the different ratios between the axial force V_c and its critical load V_cr, the specific analysis of the influence of the axial force shows that this effect needs to be considered in soft formations, whereas in hard rock formations, there is a significant effect on the internal forces of the upper arch The influence of the horizontal displacement and corner of the wall should be modified according to the formula given.