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试验说明,采用柔性接头的拼装式圆形衬砌在爆炸荷载作用下的工作特点是:①能与地层更好地共同作用,为衬砌创造极为有利的工作条件。②在动载作用下能充分地表现“准静态”的反应特征,缓和动力作用。③对荷载的变化具有较大的调整适应能力。 拼装式衬砌接头设计的基本原理,在试验中得到了验证,证明原理正确,效果明显。合理的接头结构应能减小弯矩,消除应力集中。
The test shows that the working characteristics of the assembled circular lining with flexible joints under the action of blast load are: ① better able to work together with the formation to create extremely favorable working conditions for the lining. ② under the action of dynamic loading can fully reflect the “quasi-static” response characteristics, ease the dynamic effect. ③ changes in load with greater adaptability to adapt. The basic principle of the assembled lining joint design has been verified in the experiment, proving the principle is correct and the effect is obvious. Reasonable joint structure should be able to reduce the bending moment, eliminating stress concentration.