摘要:
本文根据大量试验和数值分析结果指出:在侧向爆荷下岩洞在厚度为跨度三分之一围岩中具有厚壁受弯构件的力学特征,而在该围岩区外即基本上接近自由场应力状态,并可用厚板理论方程在自由场压力的外载下进行求解.因此,地下结构与围岩动力相互作用,可用分别代表衬砌及介质的基于薄板与厚板理论的受弯构件动力方程宋描述.围岩和衬砌二者之间的相互作用力用接触压力函数q(x,t)加以联系.通过解一组联立方程,给出了计入与弹性半空间相互作用效应的直墙拱顶衬砌时动力分析的解析解,同时列出了函数q(x,t)的解析表达式. 本解析解将有助于从理论上探讨地下结构与介质动力共同作用的一些本质问题.
Abstract:
In this paper according to the results of a great quantity of tests and numerical calculations, it is pointed out that the country rock with thickness of 1/3 span has mechanical characteristics of a thick flexure member in underground rock cave subjected to transverse blast loading, however, it is approaching to stress state of free ffield outside country rock, the equation of thick plate theory under loading of free field pressure may be applicable to solution of this problem.Therefore, the underground structure-cuuntry rock dynamic interaction may be described by dynamic equations of flexure member of thin plate and thick plate, which express liner and country rock respectively.The interaetion force between the liner and country rock is expressed as contacting pressure function q(x,t),Solving the system of simultaneous equations, the analytical solution to riynamic analysis of arch-straight liner including elastic half space interaction effect is given and the analytical expression of function q(x,t) is obtained.This analytic solution will be contributed to the study of some substantive problems of underground structure-medium interaction.
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