欢迎来到天天文库
浏览记录
ID:48317588
大小:1.12 MB
页数:19页
时间:2020-01-10
《铁炉子隧道结构计算》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊┊┊┊┊┊毕业设计(论文)报告纸二次衬砌内力计算一、基本资料铁炉子沟二级公路隧道,结构断面如附图1所示,围岩级别为V级,容重,围岩的弹性抗力系数,,衬砌材料为C25混凝土,弹性模量,容重,荷载按松散压力的42%计。附图1衬砌结构断面二、荷载确定1.围岩竖向均布压力:式中:—围岩级别,此处5;—围岩容重,此处—跨度影响系数,,其中毛洞跨度共页第页┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊┊┊┊┊┊毕业设计(论文)报告纸11.7+2×0.06=11.82m,其中0.06m为一侧平均超挖量,时,,此处1+0
2、.1×(11.82-5)=1.682。式中:q=0.45围岩竖向均布压力q按松散压力的42%计:q=240.997×0.42=101.219kPa此处超回填层重忽略不计。2.围岩水平均布压力:e=0.4q=0.4×101.219=40.487kPa。三、衬砌几何要素1.衬砌几何尺寸内轮廓线半径:R1=5.40mR4=7.64mr=1.00m截面厚度恒为:d=0.45,m外轮廓半径:R3=5.85mR2=8.09m=1.45m内径R1,R4所画曲线的终点截面与竖直轴的夹角:拱轴线半径:5.625mm拱轴线各段圆弧中心角:90º14.2762º2.半拱轴线长度及分段轴长分段轴线长度:m,m,半拱轴
3、线长度:9.00636m.将半拱轴线等分为8段,每段轴长为:=1.125795m.衬砌结构计算图示共页第页┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊┊┊┊┊┊毕业设计(论文)报告纸附图2由上图量接缝中心点坐标:几何要素表附表1接缝中心点坐标截面与竖直轴夹角(度)xy0000113.77481.33930.1618227.54962.60170.6378341.32433.71431.4007455.09914.61132.4066568.87395.24693.5976682.64875.57884.9053794.54015.60036.18518905.38217
4、.5645四、计算位移1、单位位移用辛普生法近似计算,按计算列表进行。单位位移的计算见附表2单位位移计算表共页第页┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊┊┊┊┊┊毕业设计(论文)报告纸附表2截面asinacosaxy000100113.77480.23810.97121.33930.1618227.54960.46250.88662.60170.6378341.32430.66030.75103.71431.4007455.09910.82010.57224.61132.4066568.87390.93280.36045.24693.5976682.64870.9
5、9180.12805.57884.9053794.54010.9969-0.07925.60036.18518901.00000.00005.38217.5645dI1/Iy/Iy*y/I(1+y)*(1+y)/I积分系数1/30.450.00759131.68720.00000.0000131.687210.450.00759131.687221.30703.4475177.748740.450.00759131.687283.990153.5689353.236420.450.00759131.6872184.4543258.3652758.961140.450.00759131.6872
6、316.9185762.69611528.220420.450.00759131.6872473.75801704.39192783.595240.450.00759131.6872645.96543168.65424592.272320.450.00759131.6872814.49885037.75636798.441140.450.00759131.6872996.14817535.36279659.34621 ∑1053.49793021.989614507.014821604.4919 单位位移值计算如下:=ds≈=×1053.4979=40.2042×10-6.×3021.9896
7、=115.3268×10-6.×14507.0148=553.6246×10-6.计算精度校核为:40.2024×10-6+2×115.3268×10-6+553.6246×10-6=824.4806×10-6×21604.4919=824.4823×10-6.闭合差=0。2、载位移——主动荷载在基本结构中引起的位移共页第页┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊┊┊┊
此文档下载收益归作者所有