【摘要】 随着科学技术的发展，人们目标是构筑能够承受更高冲击荷载的地下工程。当前所采用的措施之一，是用一种柔性材料回填在毛洞与衬砌之间，形成一种刚柔结合的地下工程结构体系。利用柔性材料可大量吸收冲击震动能量的特性，将地下工程构成高抗力结构体系。主要论述了柔性回填材料在高抗力地下工程中的作用；同时利用能量原理导出了在强冲击条件下回填材料理想厚度的计算方法。试验证明．本文的方法，计算值与试验值吻合很好．可以推广应用。更多还原

【Abstract】 Underground structures near shock sources are designed not only against intense impulsive loading,but also against intense vibration. In order to enhance the resisting capacity of a structure,one of the technical measures is to insert backpacking material between the lining and the surrounding rock. The kind of material to be used should be elastoplastic and soft,and able to absorb a large amount of shock energy as well as to cut down the pressure on the lining and vibration effects in the structure. In this paper,on the basis of energy principle,a method is derived for calculating the optimum thickness of the backpacking under intense impulsive loading. The method of calculation is of practical use.更多还原