發(fā)布時間：2018-11-27 20:34

【摘要】：為研究深埋雙線鐵路隧道襯砌高水壓分界值以及高水壓作用下的襯砌受力狀態(tài),基于雙線鐵路隧道設(shè)計標準,利用有限元軟件計算和分析雙線鐵路隧道襯砌在不同水壓作用下隧道襯砌安全系數(shù)的變化規(guī)律,確定雙線鐵路隧道襯砌的高水壓分界值。研究結(jié)果表明:Ⅱ、Ⅲ級圍巖條件下水壓力在0~0.05 MPa(約等于隧道凈高一半)和Ⅳ、Ⅴ級圍巖條件下水壓力在0~0.1 MPa(約等于隧道凈高)范圍內(nèi)變化時,隧道斷面安全系數(shù)基本不變。在Ⅱ、Ⅲ級圍巖條件下,雙線隧道的高水壓第一分界值為0.08~0.20 MPa;高水壓第二分界值可取為0.40MPa。在Ⅳ、Ⅴ級圍巖條件下,雙線隧道的高水壓第一分界值為0.12~0.35 MPa;高水壓第二分界值為0.50 MPa。雙線鐵路隧道采用標準設(shè)計圖進行設(shè)計時,能夠承受的最大靜水頭為50 m,超過50 m的靜水頭,則需要優(yōu)化斷面。
[Abstract]:In order to study the boundary value of high water pressure and the stress state of lining under the action of high water pressure, based on the design standard of double-track railway tunnel, The variation law of tunnel lining safety factor under different water pressure is calculated and analyzed by finite element software, and the high water pressure boundary value of double track railway tunnel lining is determined. The results show that when the launching pressure of class 鈪，

本文編號：2361961