鉆芯法檢測混凝土厚度、強度概要教學提綱

1、鉆芯法檢測混凝土厚度、強度概要二、鉆芯機結(jié)構(gòu)原理1、進給手柄 2、進給絲桿3、給水泵 4、汽油發(fā)動機5、變速箱 6、調(diào)整絲桿7、大帶輪 8、小帶輪9、鉆頭 10、立柱11、行走輪 12、底座13、推把 14、方向輪15、行走操縱柄dFcorcuf,2,4dFfcorcu221ddd抗壓強度尺寸修正系數(shù)長度與直徑比，L/d修正系數(shù)說 明2.001.00當L/d為表列中間值時，修正系數(shù)可用插入法求得1.750.981.500.961.250.931.000.87表表T0554-3 T0554-3 圓柱體和立方體試件強度等級關(guān)系表圓柱體和立方體試件強度等級關(guān)系表28d抗壓強度混凝土強度等級圓柱體15

2、0300立方體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、推定區(qū)間的上限值和下限值cormcorcuecuSkff1,1,cormcorcuecuSkff2,1,nffniic

3、orcumcorcu1,112,nffSnimcorcuicorcucormcorcuf,icorcuf,1,ecuf2,ecuf2,1kkcorS十、推定區(qū)間的置信度 和 所構(gòu)成推定區(qū)間的置信度宜為0.85 與 之間的差值不宜大于5.0 MPa和0.1 兩者的較大值1,ecuf2,ecuf1,ecuf2,ecufmcorcuf,十一、強度推定值corecuecuSffk1,2,1,ecuf試件數(shù)nk1（0.10）k2（0.05）試件數(shù)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強度推定值例題mcorcuf,corSn1k2k1,ecuf2,ecufk樣本容量、芯樣標準差與推定區(qū)間下表給出樣本容量下表給出樣本容量與與和和之間的之間的ncorSkncorSkncorSk樣本容量、芯樣標準差與推定區(qū)間mcorcuf,kcorSn樣本容量、芯樣標準差與推定區(qū)間kcorSn厚度計算iiiTTT01iTiT1iT0Snt