本文選題：秦嶺引水隧洞 + 圍巖�。� 參考：《水利水電技術(shù)》2017年08期

【摘要】：對引漢濟(jì)渭工程秦嶺引水隧洞開挖的初期支護(hù)施工過程圍巖結(jié)構(gòu)的塑性變形分布規(guī)律進(jìn)行分析研究,結(jié)合計算結(jié)果,為初期支護(hù)過程圍巖的穩(wěn)定性提供分析依據(jù),以便對現(xiàn)場施工提供合理化建議。采用非線性彈塑性有限元法,依據(jù)地下結(jié)構(gòu)設(shè)計理論及巖石的Drucker-Prager屈服準(zhǔn)則,考慮圍巖和初期支護(hù)襯砌結(jié)構(gòu)的整體性,對秦嶺引水隧洞的Ⅲ、Ⅳ類圍巖開挖和初期支護(hù)結(jié)構(gòu)的施工過程進(jìn)行了模擬,計算了開挖施工過程三種不同工況下圍巖頂拱及側(cè)向的塑性變形。結(jié)果表明:秦嶺隧洞初期支護(hù)施工過程的三種工況下圍巖結(jié)構(gòu)的塑性變形主要集中在頂拱120°范圍內(nèi)及兩側(cè)邊墻,隧洞圍巖結(jié)構(gòu)整體處于安全狀態(tài)。
[Abstract]:The distribution law of plastic deformation of surrounding rock structure during the initial supporting construction process of Qinling diversion tunnel excavation in Hanji-Jiwei project is analyzed and studied. The stability of surrounding rock during the initial supporting process is analyzed by combining the calculation results. In order to provide reasonable suggestions for site construction. Based on the theory of underground structure design and Drucker-Prager yield criterion of rock, the nonlinear elastic-plastic finite element method is used to analyze the integrity of surrounding rock and initial supporting lining structure. The excavation process of type 鈪，

本文編號：2115564