引水压力隧洞设计的相关问题探讨

Discussion on the water pressure diversion tunnel design related issues

针对目前压力隧洞设计面临水工隧洞设计规范不够完善、结构计算缺乏可靠性的实际情况,本文结合某有压输水隧洞采用不同准则进行试算最小覆盖层厚度,对计算结果进行了分析,得出了无论是上抬理论、以及近年来兴起的挪威准则、雪山准则其实质都是抗抬理论,也即是内水压力与垂直向岩体重力的比值的结论,并讨论了各国关于有压隧洞设计埋深准则及其存在的问题。

Due to the imperfect design standards and the unreliable structural calculation of the hydraulic tunnel,this paper uses different criteria to trial the minimum thickness of the coating combining with a certain pressure water-conveyance tunnel.By analyzing the results,it turns out that the essence is the lift resistance theory,no matter for the service theory,the Norwegian standards,or the snow-capped mountains criterion.It is also a conclusion on the ratio of the internal pressure and the vertical rock mass gravity.The rules of burying depth design criteria in different nations and their existing problems are also discussed.