隧道二次衬砌内力计算课程设计(包含内力图)

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1、地下结构课程设计姓名：宋伟涛班级：地下122学号:120719209二次衬砌内力计算1.1基本资料结构断面图如图1所示。围岩级别为V级，容重,围岩的弹性抗力系，衬砌材料为C45混凝土，弹性模量为容重图1.1结构断面图2.计算作用在衬砌结构上的主动荷载2.1隧道深浅埋的确定坍落拱高度按下式计算：Ⅴ级围岩，s=5；B>5，i=0.1浅埋隧道分界深度：因为，所以是浅埋隧道2.2竖直和水平荷载垂直力：取水平力：3.半拱轴线长度3.1衬砌的几何尺寸内轮廓线半径：内径所画圆曲线端点截面与竖直轴线的夹角：拱顶截面厚度：，拱底截面厚度：。拱轴线半

2、径：拱轴线各段圆弧中心角：3.2半拱轴线长度S及分段轴长半拱线长度：将半拱轴线等分为10段，每段轴长为：4.分块图：5各分块接缝（截面）中心几何要素5.1与竖直轴夹角:另一方面角度闭合差5.2各截面中心点坐标计算6计算基本结构的单位位移截面αsinαcosαxyd1/Iy/Iy^2/I(1+y)^2/I系数0001000.596.1540096.1541112.14040.21030.97761.45110.15430.596.15414.83662.2893128.11644224.28080.41120.91152.83730

3、.61040.596.15458.692435.8258249.36462336.42120.59370.80474.09661.34770.596.154129.5867174.6441529.97154448.56160.74970.66185.17272.33350.596.154224.3754523.57991068.48462560.7020.87210.48946.01743.52350.596.154338.79861193.75691967.50824672.84240.95550.2956.59294.8645

4、0.596.154467.74112275.32673306.9632784.98280.99620.08756.87366.29660.596.154605.44333812.23415119.27474897.12320.9923-0.1246.84677.75560.596.154745.7325783.59887371.216729109.54170.9424-0.33456.52169.14990.596.154879.79958050.07739905.8303410139.98720.643-0.76595.6981

5、10.33620.596.154993.86710272.807812356.6958961.543953.602526813.825735682.5707校核35682.5707计算得各单位位移如下：计算精度校核为：闭合差Δ=07.计算主动荷载在基本机构中产生的位移和7.1每一分块上的作用力竖直力：衬砌外缘相邻两截面之间的水平投影长度，由计算图式得：校核：m水平压力：衬砌外缘相邻两截面之间的竖直向投影长度，由计算图式得：校核：自重力：，钢筋混凝土构件重度γ'=25kN/m3。由上文计算得7.2各分块外力及力臂表各外力对各分分块截

6、面的力臂可由分块图量出计算得各分块外力如下表：截面集中力(KN)力臂(m)QGE00000001294.595518.266314.80640.69840.72230.32972280.875218.266344.60430.61470.68510.4693256.374518.266369.68260.49910.62050.58944218.741618.266394.66840.36050.51250.68815172.484418.2663114.93470.20280.3930.74256116.03518.266312

7、7.79770.04150.24780.7685757.037518.2663137.2368-0.11810.10020.76478018.2663140.47570-0.05790.72759018.2663133.90540-0.2010.635910018.2663119.28410-0.45640.4217外荷载在基本结构中产生的内力计算原理如下弯矩：轴力：为相邻两截面中心点的坐标增量，按下式计算：7.3计算表：截面-Eae0000000001-205.7455-13.1937-4.88170000-223.82092-

8、172.654-12.5142-20.9194312.861814.8064-433.689-6.7532-870.35073-127.9565-11.3342-41.0709612.003359.4107-770.6958-43.8035-186