【摘要】：以分析深埋長隧洞圍巖應力和應變?yōu)槟繕?考慮隧洞施工方式,圍巖支護形式等因素,通過數(shù)值計算,動態(tài)模擬隧洞施工過程,獲取了黃三段輸水隧洞初期支護后的圍巖變形情況以及圍巖與襯砌相互作用關系。計算結果顯示:采用設計的初期支護形式,可有效控制不良洞段的圍巖變形,Ⅳ、Ⅴ類圍巖最大收斂變形滿足規(guī)范設計要求。Ⅳ、Ⅴ類圍巖與襯砌間的相互作用力隨襯砌澆筑時距掌子面距離的增加而降低,但在距掌子面約4倍洞徑后降幅微小。通過對比分析經(jīng)驗方法與數(shù)值方法所確定圍巖壓力成果,確定了襯砌結構設計所需的圍巖壓力指標,為黃三段輸水隧洞設計提供了依據(jù),分析方法可為相似工程提供參考。
[Abstract]:In order to analyze the stress and strain of surrounding rock in deep buried long tunnel, considering the factors such as tunnel construction mode, surrounding rock supporting form and so on, the construction process of tunnel is simulated dynamically by numerical calculation. The deformation of surrounding rock and the interaction between surrounding rock and lining are obtained. The results show that the initial support can effectively control the deformation of the surrounding rock in the bad tunnel section, and the maximum convergent deformation of the surrounding rock of class 鈪，

本文編號：2184688