一盾构始发井端头地层加固计算1、强度验算将加固土体视为厚度为t的周边自由支承的弹性圆板,在外侧水土压力作用下,板中心处的最大弯曲应力,按弹性力学原理求得,并可写出强度验算公式:2max21twrtK其中:33(3)(30.2)1.28810.5(18.90.318.43.864)38.38wKPa20.5(18.90.318.43.3818.642.87w9.24.234)107.104151.20KPa1294.79294.79wKPa,3.312Drm,6tmuq取值为:4-1为0.8MPa3-1、3-2为1.4MPa0.11811810utqMPaKPa11.5K22max22194.793.311181.234.6278.6761.5twrKPaKPatK周边自由支承的圆板,其支座处的最大剪力亦可按弹性力学原理求得,并写出其抗剪强度的验算公式:max234cwrtKmax23394.793.31196.739.22131.14461.5cwrKPaKPatK所以,加固土体强度验算满足2、整体稳定验算洞外加固土体在上部土体和地面堆载P等作用下,可能沿某滑动面向洞内整体滑动,假定滑动面是以端墙开洞外顶点0为圆心,开洞直径D为半径的滑弧面,此时,引起的下滑力矩为:32123223tQDrDPDMMMM上23706.62204.96466.62226.621533.851971.702127.535633.08.223KNm抵抗的下滑力矩为:123MMMM2231.34.9646.6231.36.62(1.134)3501.1346.6218558.03.2KNm抗滑移安全系数:218558.033.411.55633.08MKM所以,加固土体整体稳定性验算满足二中间风井到达端头地层加固计算1、强度验算将加固土体视为厚度为t的周边自由支承的弹性圆板,在外侧水土压力作用下,板中心处的最大弯曲应力,按弹性力学原理求得,并可写出强度验算公式:2max21twrtK其中:33(3)(30.2)1.28810.5(18.90.819.022.118.01.119.05.219.022.708)w112.584KPa20.5(18.90.819.022.118.01.119.05.219.027.18.52.228)w1017.528339.101KPa12225.8432225.843wKPa,3.312Drm,9tmuq取值为:4-1为0.8MPa、3-2为1.4MPa0.110010utqMPaKPa11.5K22max221225.8433.311001.236.6666.6791.5twrKPaKPatK周边自由支承的圆板,其支座处的最大剪力亦可按弹性力学原理求得,并写出其抗剪强度的验算公式:max234cwrtKmax233225.8433.31166.6762.30111.114491.5cwrKPaKPatK所以,加固土体强度验算满足2、整体稳定验算洞外加固土体在上部土体和地面堆载P等作用下,可能沿某滑动面向洞内整体滑动,假定滑动面是以端墙开洞外顶点0为圆心,开洞直径D为半径的滑弧面,此时,引起的下滑力矩为:32123223tQDrDPDMMMM上23706.62199.15896.6222396.62226.62()22231533.857149.662127.5310811.04.KNm抵抗的下滑力矩为:123MMMM2(150.831.32.13133)6.623130.3326.6223500.1686.6229121.88.KNm抗滑移安全系数:229121.882.691.510811.04MKM所以,加固土体整体稳定性验算满足三、中间风井盾构始发端头地层加固计算1、强度验算将加固土体视为厚度为t的周边自由支承的弹性圆板,在外侧水土压力作用下,板中心处的最大弯曲应力,按弹性力学原理求得,并可写出强度验算公式:2max21twrtK其中:33(3)(30.2)1.28810.5(18.91.819.022.318519.01.9180.7)w19.020.518.50.709)1011.109230.66KPa20.5(18.91.819.022.318519.021.9180.719.020.5w18.52.2185.129)1017.729356.81KPa12293.742293.74wKPa,3.312Drm,7tmuq取值为:4-1为0.8MPa、3-1为1.4MPa、3-2为1.4MPa0.1414010utqMPaKPa11.5K22max221293.743.311401.278.8193.3371.5twrKPaKPatK周边自由支承的圆板,其支座处的最大剪力亦可按弹性力学原理求得,并写出其抗剪强度的验算公式:max234cwrtKmax233293.743.31233.33104.17155.564471.5cwrKPaKPatK所以,加固土体强度验算满足2、整体稳定验算洞外加固土体在上部土体和地面堆载P等作用下,可能沿某滑动面向洞内整体滑动,假定滑动面是以端墙开洞外顶点0为圆心,开洞直径D为半径的滑弧面,此时,引起的下滑力矩为:32123223tQDrDPDMMMM上23706.62199.90976.6222376.62226.62()22231533.855891.462127.539552.84.KNm抵抗的下滑力矩为:123MMMM2(151.4931.33.4193131.2813501.278)6.623506.62230564.08.KNm抗滑移安全系数:230564.083.201.59552.84MKM所以,加固土体整体稳定性验算满足四盾构吊出井端头地层加固计算1、强度验算将加固土体视为厚度为t的周边自由支承的弹性圆板,在外侧水土压力作用下,板中心处的最大弯曲应力,按弹性力学原理求得,并可写出强度验算公式:2max21twrtK其中:33(3)(30.2)1.28810.5(18.92.219.025.380.88.51.113)w106.41143.223KPa20.5(18.92.219.025.380.88.54.793.033)w1013.03238.32KPa12190.772190.77wKPa,3.312Drm,9tmuq取值为:4-1为0.8MPa、3-1为1.4MPa、3-2为1.4MPa0.1414010utqMPaKPa11.5K22max221190.773.311401.230.9693.3391.5twrKPaKPatK周边自由支承的圆板,其支座处的最大剪力亦可按弹性力学原理求得,并写出其抗剪强度的验算公式:max234cwrtKmax233190.773.31233.3352.62155.564491.5cwrKPaKPatK所以,加固土体强度验算满足2、整体稳定验算洞外加固土体在上部土体和地面堆载P等作用下,可能沿某滑动面向洞内整体滑动,假定滑动面是以端墙开洞外顶点0为圆心,开洞直径D为半径的滑弧面,此时,引起的下滑力矩为:32123223tQDrDPDMMMM上23706.62197.04396.6222396.62226.62()22231533.855952.552127.539613.93.KNm抵抗的下滑力矩为:123MMMM2(152.231.34.5233130.7773502.223)6.623506.62225277.33.KNm抗滑移安全系数:225277.332.631.59613.93MKM所以,加固土体整体稳定性验算满足