《1围岩压力计算.doc》由会员分享，可在线阅读，更多相关《1围岩压力计算.doc（11页珍藏版）》请在金锄头文库上搜索。
1、1围岩压力计算 深埋和浅埋情况下围岩压力的计算方式不同，深埋和浅埋的分界按荷载等效高度值，并结合地质条件、施工方法等因素综合判断。按等效荷载高度计算公式如下：=（22.5） 式中: Hp隧道深浅埋的分界高度； hq等效荷载高度，=； q垂直均布压力(kN/m2)； 围岩垂直重度（kN/m3)。二次衬砌承受围岩压力的百分比按下表取值：表4.1 复合式衬砌初期支护与二次衬砌的支护承载比例围岩级别初期支护承载比例二次衬砌承载比例双车道隧道三车道隧道双车道隧道三车道隧道 100100安全储备安全储备10080安全储备20706030405040506030308085浅埋地段5030506060801
2、.1 浅埋隧道围岩压力的计算方法 隧道的埋深H大于hq而小于Hp时，垂直压力。表4.3 各级围岩的值及值围岩级别0.9（0.70.9）（0.50.7）607050604050侧压力系数作用在支护结构两侧的水平侧压力为：e1=h ； e2=(h+Ht) 侧压力视为均布压力时：级围岩的等效荷载高度hq=0.45241+0.1(10-5)=10.8mHp=2.5hq=27m,HHq,故为浅埋。取0=45，=0.60=27，h=20m，tan=3.02,=0.224,tan=0.51,计算简图：垂直压力q=1920(1-0.224200.51/10)=293.18KN/mPg=d=0.425=31.4
3、KN/m地基反力P=324.58KN/me1=h=19200.224=85.12e2=(h+Ht)=19(20+8.17)0.224=119.89水平均布松动压力e=(e1+e2)/2=102.51KN/m级围岩二衬按承受50%围岩压力进行计算，则垂直压力为q50%=146.59KN/m地基反力为P50%=162.29KN/m水平压力为e50%=51.255KN/m2衬砌结构内力计算表4.7 等效节点荷载节点号XYFxFY12072.7425911544.43986431304.661672146.31947332072.7571461543.97284326425.973974953.686
4、55242072.8007531543.50763426256.112339886.16153152072.8732441543.04604425973.8182514776.3013222072.9743381542.58986424195.3650823664.9765472073.2198751542.14627320103.9075440260.1445862073.6514121541.8801214076.9074457497.4501392074.1540411541.736858935.04376469728.97104102074.6616681541.612446853.5
5、2439683279.07293112075.1735851541.5070655880.16913884021.81746122075.6890791541.420874898.83475784650.54514132076.207431541.3539773910.85285985164.40397142076.7279171541.3064792917.56427585562.69609152077.2498141541.278441920.31649885844.88594162077.7723941541.269902920.462661286010.58403172078.2949
6、291541.28087580.6400040986059.57127182078.816691541.311344-1081.6332485991.77462192079.336951541.361267-2081.15878985807.29146202079.8549841541.430575-3077.86018785506.38146212080.370071541.51917-4070.38507285089.42599222080.881491541.626929-5057.38671884557.0093232081.3885321541.753702-6037.5255768
7、3909.861782081.8904881541.899313-7009.47157883148.84332252082.2856481542.168245-9244.51530374199.42618242082.5108441542.589864-14047.4701552646.58913272082.6119371543.046044-19236.0650636865.64791282082.6844291543.507634-23588.8367322476.63737292082.7280361543.972843-25973.8182514776.30132262082.742
8、5911544.439864-26256.112339886.161531302082.7061351545.042547-26425.973974953.686552312082.59731545.636442-31304.661672146.312144322082.4176721546.212888-35817.57933-13486.31665332082.1698711546.76348-34895.66231-26741.88598342081.857511547.280188-33376.67067-39539.88928352081.4851451547.755477-3128
9、6.59479-51661.35041362081.0582041548.182418-28661.19683-62898.88118372080.5829151548.554783-25545.39795-73060.19214382080.0662071548.867144-21992.50975-81971.4129392079.5156151549.114945-18063.32375-89480.08252402078.9391691549.294573-13825.06958-95457.72954412078.3452741549.403408-9350.264619-99802
10、.07078422077.7425911549.439864-4715.473839-102438.7705432077.1399081549.4034080-103322.7082442076.5460131549.2945734715.473839-102438.7631452075.9695661549.1149459350.264619-99802.07078462075.4189751548.86714413825.06984-95457.73687472074.9022671548.55478318063.324-89480.08985482074.4269781548.18241
11、821992.50975-81971.4129492074.0000371547.75547725545.39769-73060.18481502073.6276721547.28018828661.19683-62898.88118512073.3153111546.7634831286.59505-51661.35041522073.067511546.21288833376.67067-39539.88195532072.8878821545.63644234895.66205-26741.88598542072.7790471545.04254735817.57908-13486.32
12、398表4.8 轴力、剪力、弯矩详细数据节点号轴力弯矩剪力1-8.92E+05-13456-109952-8.83E+05-8352.6-638913-8.73E+0521398-1.19E+054-8.61E+0576686-1.72E+055-8.69E+051.57E+05-252076-7.80E+051.69E+053.16E+057-2.08E+067906.2339838-2.06E+06-11168325749-2.05E+06-295192963810-2.04E+06-463472539511-2.03E+06-609672007312-2.02E+06-728131390913-2.02E+06-814427144.714-2.02E+06-8654026.68815-2.02E+06-87920-7193.616-2.02E+06-85526-1426717-2.02E+06-79433-2094718-2.03E+06-69844-2698819-2.04E+06-57093-3214820-2.05E+06-41637-3619121-2.07E+06-24058-3889122-2.08E+06-5056.4-4002923-7.88E+0514553-3.07E+0524-8.72E+051.6
