钻芯法检测混凝土厚度、强度概要教学提纲

1、钻芯法检测混凝土厚度、强度概要二、钻芯机结构原理1、进给手柄 2、进给丝杆3、给水泵 4、汽油发动机5、变速箱 6、调整丝杆7、大带轮 8、小带轮9、钻头 10、立柱11、行走轮 12、底座13、推把 14、方向轮15、行走操纵柄dFcorcuf,2,4dFfcorcu221ddd抗压强度尺寸修正系数长度与直径比，L/d修正系数说 明2.001.00当L/d为表列中间值时，修正系数可用插入法求得1.750.981.500.961.250.931.000.87表表T0554-3 T0554-3 圆柱体和立方体试件强度等级关系表圆柱体和立方体试件强度等级关系表28d抗压强度混凝土强度等级圆柱体15

2、0300立方体150150150C2/2.52.0 2.5 C4/54.0 5.0 C6/7.56.0 7.5 C8/108.0 10.0 C10/12.510.0 12.5 C12/1512.0 15.0 C16/2016.0 20.0 C20/2520.0 25.0 C25/3025.0 30.0 C30/3530.0 35.0 C35/4035.0 40.0 C40/4540.0 45.0 C45/5045.0 50.0 C50/5550.0 55.0 542 . 2九、推定区间的上限值和下限值cormcorcuecuSkff1,1,cormcorcuecuSkff2,1,nffniic

3、orcumcorcu1,112,nffSnimcorcuicorcucormcorcuf,icorcuf,1,ecuf2,ecuf2,1kkcorS十、推定区间的置信度 和 所构成推定区间的置信度宜为0.85 与 之间的差值不宜大于5.0 MPa和0.1 两者的较大值1,ecuf2,ecuf1,ecuf2,ecufmcorcuf,十一、强度推定值corecuecuSffk1,2,1,ecuf试件数nk1（0.10）k2（0.05）试件数nk1（0.10）k2（0.05）151.2222.566371.3602.149161.2342.524381.3632.141171.2442.486391

4、.3662.133181.2542.453401.3692.125191.2632.423411.3722.118201.2712.396421.3752.111211.2792.371431.3782.105221.2862.349441.3812.098231.2932.328451.3832.092241.3002.309461.3862.086251.3062.292471.3892.081261.3112.275481.3912.075271.3172.260491.3932.070281.3222.246501.3962.065291.3272.232601.4152.022301

5、.3322.220701.4311.990311.3362.208801.4441.964321.3412.197901.4541.944331.3452.1861001.4631.927341.3492.1761101.4711.912351.3522.1671201.4781.899361.3562.158强度推定值例题mcorcuf,corSn1k2k1,ecuf2,ecufk样本容量、芯样标准差与推定区间下表给出样本容量下表给出样本容量与与和和之间的之间的ncorSkncorSkncorSk样本容量、芯样标准差与推定区间mcorcuf,kcorSn样本容量、芯样标准差与推定区间kcorSn厚度计算iiiTTT01iTiT1iT0Snt