Phase2软件在隧洞开挖围岩支护时机中的应用  

Application of Phase 2 Software in Support Time of Surrounding Rock in Tunneling

作　　者：何欣[1] 曹怀园[1] 刘永智[1] 刘洁玉[1] 

机构地区：[1]中国电建集团西北勘测设计研究院有限公司,西安710065

出　　处：《西北水电》2015年第3期49-53,共5页Northwest Hydropower

摘　　要：新奥法支护理论允许围岩变形,"适时"支护,能够保证围岩稳定的前提下,减少支护措施。文章利用phase2软件,引入应力释放法和弹性模量折减法解决"适时"的问题,将新奥法理论应用于德尔西水电站工程引水隧洞支护结构设计中,采用量化、清晰易懂的方式证明了合理地选择支护时机可以优化支护结构、减少工程投资,对隧洞工程支护结构设计具有实际意义。New Austrian tunneling method allows deformation of surrounding rock, support is provided at Proper Time.Under the precon-dition of securing stability of surrounding rock, support measures is decreased.In this paper, Proper Time is determined by application of stress release method and elastic module reduction method through Phase 2 software.Accordingly, theory of new Austrian tunneling meth-od is applied in design of support structure of the headrace tunnel of Delsi Hydropower Project.By application of quantitive, clear and simple means, it verifies that the proper support time allows to optimize support structure and reduce investment as well.This is practical for the design of support structure of tunneling works.

关 键 词：隧洞 支护时机 新奥法 位移 Phase2 德尔西水电站 

分 类 号：TV222.2[水利工程—水工结构工程] TV554