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本文介绍了用光弹法讲究地质构造对洞室应力分布的影响,预估围岩的合理加固范围。文中对围岩中分区不同弹模及断层界面的相似材料做了大量的研究,据此所得到应力成果及预估围岩可能破坏范围与文献的脆性材料破坏试验所得成果一致。文中还用光测数据迭加原理确定了弹性应力阶段洞室围岩在各种荷载作用下的最终成果,避免了模型由于同时加载困难所带来的单独施加荷载所造成的繁琐量测和计算。
This paper describes the use of photoelastic method to pay attention to the impact of geological structure on the stress distribution in the cavern, to predict the reasonable reinforcement of surrounding rock. In this paper, a lot of researches have been done on similar materials of different elastic modulus and fault interfaces in the surrounding rock. The results of the stress and the estimated damage range of the surrounding rock are consistent with the results of the brittle material failure test in the literature. In the paper, the final result of the surrounding rock in the elastic stress stage under various loads is also determined by the superposition principle of the photometric data, which avoids the cumbersome measurement and calculation caused by the separate loading caused by the simultaneous loading difficulties of the model .