隧洞围岩拉压不同模量弹性理论的解析解

Analytic solution to elastic theory on surrounding rocks in tunnels with different compressive and tensile moduli

采用拉压不同模量弹性理论,探讨水工压力隧洞围岩变形规律,推导了圆形隧洞弹性抗力系数与拉伸弹性模量、压缩弹性模量的数学表达式.结果表明,恰当地利用围岩拉压不同模量比,调整支护结构,可以充分发挥围岩的自持能力,从而为隧洞围岩支护设计提供理论依据.

On the basis of the elastic theory for different compressive and tensile moduli, the deformation regularity of surrounding rocks in tunnels under hydraulic pressures was discussed, and mathematical expressions of the elastic resistance coefficient, the elastic compressive modulus, and the elastic tensile modulus were deduced. It is concluded that the adoption of different compressive and tensile moduli of surrounding rocks and the adjustment of the structure of supports may help bring the selfsupport ability of surrounding rocks into full play, and this provides a theoretical basis for the design of supports for surrounding rocks in tunnels.