![地下建筑工程课程设计解析与实例](https://wfqqreader-1252317822.image.myqcloud.com/cover/904/41309904/b_41309904.jpg)
上QQ阅读APP看书,第一时间看更新
3.2.3 内力计算
取b=1.0m长度圆环进行计算,其中荷载采用设计值,即考虑荷载组合系数。
g=1.2gk=1.2×8.75kN/m2=10.5kN/m2
q=1.2q1+1.4q2+1.2q3=(1.2×116.19+1.4×20+1.2×5.07)kN/m2=173.512kN/m2
p 1=1.2p1k=1.2×82.701kN/m2=99.241kN/m2
p 2=1.2p2k=1.2×32.876kN/m2=39.451kN/m2
p R=1.2pRk=1.2×127.419kN/m2=152.903kN/m2
p k=1.2pk=1.2×65.819kN/m2=78.983kN/m2
p w1=1.2×127.80kN/m2=153.36kN/m2
p w2=1.2×189.90kN/m2=227.88kN/m2
q w1=1.2×129.55kN/m2=155.46kN/m2
q w2=1.2×188.05kN/m2=225.66kN/m2
q w2 -q w1=(225.66-155.46)kN/m2=70.20kN/m2
(1)自重g作用下隧道圆环内力
![](https://epubservercos.yuewen.com/AE4759/21511157508182706/epubprivate/OEBPS/Images/71_01.jpg?sign=1734436880-Wbv0pWQRAdR1hfU2TOxoWLk9v5orHlC0-0-48e6504d52e2682c838f0e3ddce5a4d0)
(2)均布竖向地层荷载q作用下隧道圆环内力
![](https://epubservercos.yuewen.com/AE4759/21511157508182706/epubprivate/OEBPS/Images/71_02.jpg?sign=1734436880-fk4wuEmrY3UHTWIO6NBIJH4BOkcb0zFJ-0-b5304d93e4f412b398db3afe5b471ab4)
(3)水压作用下隧道圆环内力
![](https://epubservercos.yuewen.com/AE4759/21511157508182706/epubprivate/OEBPS/Images/71_03.jpg?sign=1734436880-Uw1BAl8uuR035Yf8ELwxo6JlbEIML0Ju-0-c2f5fa860dcabc71a12a3138dbeca650)
(4)水平地层均布荷载p1作用下隧道圆环内力
![](https://epubservercos.yuewen.com/AE4759/21511157508182706/epubprivate/OEBPS/Images/71_04.jpg?sign=1734436880-pxsctg0UhT0LmO3Kl9d8wW00uP1huiqt-0-427eaee5cca92bffe1e1ca6c2bf567eb)
(5)底部反力pR作用下隧道圆环内力
![](https://epubservercos.yuewen.com/AE4759/21511157508182706/epubprivate/OEBPS/Images/71_05.jpg?sign=1734436880-ClLA3dMO02V7lwE07rnbv2xaBIL8oGsN-0-a3151c86e9bcfadc3f14f5a0be29b63b)
(6)三角形水平压力p2作用下隧道圆环内力
![](https://epubservercos.yuewen.com/AE4759/21511157508182706/epubprivate/OEBPS/Images/71_06.jpg?sign=1734436880-16PNRse5mJ0ivNnemPgS9khgpX3qJtnM-0-ebc18a4857bef8dcb09347b97eff826f)
(7)pk引起隧道圆环内力
由pk引起的圆环内力(弯矩M、轴力N)按下式计算:
![](https://epubservercos.yuewen.com/AE4759/21511157508182706/epubprivate/OEBPS/Images/71_07.jpg?sign=1734436880-6MhnonSz0ZhDCllLQO7TQlKHwfkcLPe1-0-989a1efe523df04ef209c77dc88ca569)
计算结果见表3-7。
表3-7 隧道圆环内力计算结果
![](https://epubservercos.yuewen.com/AE4759/21511157508182706/epubprivate/OEBPS/Images/71_08.jpg?sign=1734436880-VuszaTU5XN2xSczMhXscimlCF0BFg9ul-0-9838dc348534fa2ccfee23ed6dc88dbc)
(续)
![](https://epubservercos.yuewen.com/AE4759/21511157508182706/epubprivate/OEBPS/Images/72_01.jpg?sign=1734436880-FW2iIciSZ5A2AAlyI0VWA6m8eGyZpsbe-0-e1ad248feedceb5fd36fcf47f69ab1d9)