隧道强度检测报告

检测报告隧道工程概况强度检测工作原理混凝土强度质量检测承受超声回弹法检测。声波测速法是利用纵波波速与强度的关系以及对反射波特性的分析对混凝土强度和质量进展检测。超声回弹法是利用回弹仪和超声仪同时测量混凝土的回弹值Rn和声时值Vn，按超声回弹综合测强曲线求得强度换算值，依据有关标准，得到混凝土强度推定值。混凝土是由多种材料组成的多相非匀质体。对于正常的混凝土，声波在其中传播的速度是有确定范围的，当传播路径遇到砼的缺陷时，声波要绕过缺陷或在传播速度较慢的介质中通过，声波将发生衰减，造成传播时间延长，使声时增大，计算声速降低，波幅减小，波形畸变，利用超声波在砼中传播的这些声时Vn—强度参数的变化，来分析推定衬砌砼强度。回弹法是用一弹簧驱动的重锤，通过弹击杆，弹击混凝土外表，并测出重锤被反弹回来的距离，以回弹值作为与强度相关的指标，建立回弹值Rn—强度曲线，来推定混凝土强度的方法。10m检测一个断面，每个断面都垂直于隧道轴向布点，每个断面从拱顶中线起，每2m检查一个点，在有疑问段加密测线或测点。混凝土强度的测定具体步骤如下：1Vn—强度参数确实定依据本工程的原材料品种、规格，按施工协作比配制一样强度等级的混凝土，制作150mm立方体试块；有条件的最好在施工过程中随机抽取试样。成型工艺和养护条件与工地现场保持全都。依据衬砌混凝土龄期选取一样龄期的试件，选一对侧面测试试块声Vn，fcu。以数理统计方法对试验数据Vn—fcu进展回归分析，建立统计的数学模型，并确定回归的效果和误差范围。2Rn—强度曲线确实定选取混凝土的另一对侧面，测定混凝土回弹值；然后测定混凝土极fcu。以数理统计方法对试验数据Rn—fcu进展回归分析，建立统计的数学模型，并确定回归的效果和误差范围。3VnRn4、现场衬砌混凝土强度推定依据现场测试衬砌混凝土的声时Vn和回弹值Rn,参照声时Vn—强度参数和回弹值Rn—强度建立的专用或地区混凝土强度回归曲线，可以得出衬砌混凝土强度。野外工作方法11名、回弹12名。测点的布置：检测前，在每个需检断面位置搭建检测台架，清理测线上的障碍物。测线按要求在拱顶、左右拱腰、左右起拱线、左右边墙布置7～10个测图2，图中以线路走向为前进方向。数据采集按标准要求，每测区把握在0.04m2范围内，回弹16每个区先进展回弹检测，然后在区内进展超声检测。1所示3

4

5测区2 测区6测区1 测区7图1 测线布置示意图仪器性能指标CUT-201型超声ZC3-A型砼回弹仪。CUT-201编号：HCW21-02082。0576。CUT-210超声波仪特点为：完善的智能化设计，承受先进的WindowsCE环境下开发的智能化操控，自动数据采集；低噪声与宽频带设计并承受浮点放大技术，更适应不同强弱的信号电平增益与衰减，更好地满足自动采集信号的需要；实现全过程自动声参量判读——首波自动识别跟踪，信噪智能误差抑制，声时、波幅自动判读、存储。检测结果的解释处理测试中心对于二次衬砌强度的数据处理有严格标准的处理流程，以保证报告结果的准确。检测过程及结果按《超声回弹综合法检测混凝土强度技术规程》〔中国工程建设标准化委员会标准〕。结果处理程序如下：1、测区回弹值进展修正平均；2、测区超声声时值进展修正平均，计算出声速值；3、测区混凝土强度换算；测强曲线暂选用全国通用统一测强曲线，所测混凝土全部为碎石泵送混凝土。按以下粗骨料为碎石的混凝土计算各测区的混凝土强度换算值：，fcuc i 0.008(vai)1.72(Rai)1.57，式中：fcuc i——第i个测区混凝土强度换算值〔MPa〕，准确至0.1；0.01；

，vai——第i个测区修正后的超声声速值〔km/s〕，准确至Rai——第i个测区修正后的回弹值，准确至0.1；4、依据测线上各测区结果进展混凝土强度推定，确定此测线推定强fcu,e。10A〔1〕，否则承受公式〔2〕。条件A：各测区混凝土换算强度值小于25MPaSfcuc4.5MPa。25MPaSfc5.5MPacu公式〔1〕：fcu,efcuc,min,min式中：fcuc ——各测区中的最小混凝土强度换算值。公式〔2〕：fcu,emfcuc1.645Sfcuc,minmf式中： c——各测区混凝土强度换算值的平均值；cumfSfcuc——各测区混凝土强度换算值的标准差。6、检测结论依据协议要求对掛青隧道二次衬砌按每个测线断面设置。拱顶、左7个测区。隧道二次衬砌混凝土强度质1～3。工程回弹值Ｒi测测工程回弹值Ｒi测测线区12345678910111213141516ｍ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工程工程回弹值Ｒi测线测区345671234567123456789101112131415165424042424044384241404142434040414043434241444240463941383945423936414040464242414147423140414443474038394243414142404239424142394135444442404242464441384042473941424341423741384043414541443944433840393942424143424040434040404243473945424343404140424046384143414040423338394243433942404339463439404144414141414441444341403842464541423942424140414143403940424041403842424043444143444341ｍR43.339.840.639.940.443.142.340.641.541.441.641.0表1 回弹检测结果表工程测测线区 1 2 3 4 5 6 7

回弹值Ｒi9 10

11 12 13 14 15

16 ｍR1 46 42 44 43 44 42 45 40 41 43 45 39 41 42 412 38 45 45 47 46 45 47 48 42 47 43 44 43 43 41

4342.54644.73 44 50 426 4 50 43 39

43 4438 41

45 43 43 4254 43 44 43

42 4145 44

41 4341 41

42 4443 45

4543.04643.25 42 43 40 41 43 42 42 39 41 39 43 43 41 44 43 4141.96 43 39 42 39 41 43 42 40 42 41 41 40 42 42 43 4241.57 43 40 431 44 44 482 44 43 463 39 39 41

42 4345 4743 4236 46

41 43 39 4048 41 50 4541 45 41 4140 44 41 40

44 4444 4644 4540 43

41 4244 4246 4447 43

40 4044 4342 4643 43

4241.74244.64243.44241.67 4 39 46 41 44 40 41 42 41 46 46 40 44 44 46 42 4142.65 38 41 40 41 41 40 43 40 39 41 42 43 40 40 40 4040.46 41 40 41 40 42 41 41 41 40 41 42 43 39 42 42 4341.27 39 43 381 48 48 502 44 44 41

41 3946 4443 43

38 38 42 4047 46 43 4544 46 45 43

42 4140 4344 44

43 4044 4443 42

42 3946 5144 42

4140.43645.34543.63 46 44 45 44 45 47 41 39 42 46 50 47 44 43 45 4344.58 4 43 46 43 40 44 44 43 45 44 41 42 40 42 42 44 4242.95 44 44 40 45 42 44 41 42 41 41 44 45 45 42 41 4242.66 40 43 41 45 43 41 44 45 46 44 42 45 40 41 41 4342.77 43 45 43 44 45 44 45 44 46 41 44 44 44 44 43 4444.0工程工程回弹值Ｒi测线测区12345671234567123456789101112131415169104841394140414743424445414746454143424046474240434240424241434143414545434442444942414647474342413944424346464342424138394445404245474747424242424543404540415144464540424540464647444643504147434743434247483944474243474943474542424246394741435143454841414241474342414641484746454746484444424745434554424741414342384443404742433941474648484042464444414247474245494746434144464242394046444841414240444544444344524545474646474444444241414142424246414143ｍR43.041.944.343.341.643.543.042.745.243.246.244.343.843.41回弹检测结果表1回弹检测结果表工程测测线区 1 2 3 4 5 6 7

回弹值Ｒi9 10

11 12 13 14 15

16 ｍR1 43 43 45 46 44 45 45 46 46 45 42 47 44 43 442 43 45 45 48 49 44 49 43 45 42 46 49 41 43 44

4844.74644.93 45 41 40 42 41 44 41 44 46 43 44 45 41 43 44 4342.911 4 44 44 44 49 42 43 43 42 41 40 42 44 41 43 47 4042.85 46 46 44 46 44 46 47 46 46 41 47 45 43 42 44 4645.36 41 43 417 41 44 441 41 42 47

43 4244 4144 46

46 45 44 4645 46 44 4047 47 46 45

46 4145 4149 46

46 4344 4545 43

46 4542 4243 45

4744.34043.14245.02 48 44 49 45 44 40 45 43 43 45 48 43 45 45 46 4344.53 46 43 43 42 42 43 40 43 45 42 43 44 45 43 46 4743.412 4 42 46 43 45 43 43 43 46 42 45 40 42 43 41 41 4443.05 41 43 466 42 44 41

46 4442 47

45 42 43 4544 42 42 44

46 4341 46

42 4241 40

45 4444 42

4543.94242.57 46 41 42 46 40 42 42 42 44 45 40 43 40 41 41 4542.31 41 43 44 45 43 43 47 45 45 47 47 45 46 42 45 4644.72 41 43 43 43 45 45 41 45 43 42 42 44 50 44 45 4343.53 41 46 45 45 49 43 40 40 47 39 40 44 44 45 41 4443.213 45

41 44 4239 43 45

39 4043 39

44 42 43 4740 38 41 39

40 4242 40

44 4441 39

45 4342 39

4742.94040.36 45 39 42 39 41 42 43 42 38 40 43 38 39 42 43 3840.97 38 41 441 44 41 45

41 3942 41

42 40 41 4145 37 39 36

42 4139 37

39 4035 44

43 4448 41

4040.94241.02 48 41 45 42 48 45 41 42 43 42 44 42 42 42 44 4342.9314 4

40 43 4340 43 41

42 4144 42

42 40 41 4243 43 37 43

44 4242 40

39 4341 41

43 4442 40

4542.24441.85 40 40 42 40 41 40 40 41 43 39 40 41 42 43 41 4340.86 41 39 38 38 41 44 40 42 41 39 40 39 42 43 42 3840.47 39 43 411 43 43 452 43 40 383 47 48 45

44 4243 4744 4242 42

40 43 43 3946 44 42 4442 42 42 4343 41 43 52

42 4143 4346 4144 43

39 4345 4140 4145 50

43 4242 4541 4343 50

4241.94243.54041.74344.415 4 43 43 45 47 45 43 42 44 40 43 45 43 42 42 43 4343.25 44 42 46 42 47 42 47 46 43 40 41 44 48 42 46 4443.96 44 47 41 45 43 45 48 46 45 48 43 47 44 42 44 4144.67 47 43 43 48 42 43 45 44 47 47 47 43 48 42 44 4644.91回弹检测结果表1回弹检测结果表工程 回弹值Ｒi测测线区 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 ｍR1 47 45 43 42 42 47 44 50 48 43 43 49 48 42 44 44 44.82 40 40 41 41 39 41 40 39 42 44 44 41 38 44 47 41 41.13 47 45 46 46 47 42 44 42 40 49 45 43 43 44 43 44 44.316 4 43 42 47 43 43 44 43 48 41 43 44 45 45 41 47 46 43.95 46 45 46 45 46 40 43 42 42 44 45 44 41 45 43 40 43.86 46 44 417 46 47 441 42 43 45

41 4347 4145 40

45 46 47 4047 43 44 4345 41 41 41

43 4244 4643 46

41 4646 4144 43

43 4447 4244 41

44 43.546 44.942 42.82 44 44 40 42 41 43 40 41 44 42 46 41 46 44 45 41 42.63 41 47 45 46 45 43 47 41 43 49 42 47 44 43 43 41 44.117 4 43 43 41 42 43 43 40 40 42 42 41 40 42 39 38 43 41.65 42 41 436 45 42 43

40 4343 44

44 43 43 4443 42 40 45

44 4440 43

42 4242 43

42 4142 42

41 42.543 42.67 44 42 43 42 42 43 40 44 44 42 43 41 44 45 43 42 42.81 38 40 37 39 38 40 40 41 42 41 42 39 43 44 47 46 40.72 38 37 38 36 41 40 38 46 37 47 41 40 43 44 46 38 40.13 38 38 44 38 39 39 44 39 47 40 41 38 39 38 45 44 40.118 45

42 46 4037 41 39

38 4441 39

40 47 40 4438 41 39 39

41 4641 37

46 4038 37

40 4442 41

46 42.740 39.56 40 39 40 42 39 39 37 40 38 41 39 38 42 40 40 41 39.77 42 41 41 37 39 37 38 39 39 41 38 41 41 38 39 40 39.5表2 混凝土强度换算结果表142.5468740.3242.3466640.5342.5478342.5442.5464840.537.8542.3457439.1642.5446737.8742.6468441.2141.8456238.2243.4476843.7342.7461040.2444.2469643.838.2545.1476046.3643.9452240.6744.8454342.3145.9458644.0242.9445837.5341.2453737.0444.7438839.737.0545.0452242.2643.9443739.3744.1445940.0141.4466839.2239.9467736.3343.3465741.1439.8463135.635.6540.6460837.1639.9466736.9740.4474938.8测线里程桩号测区修正后回测线里程桩号测区修正后回弹值Ｒivi〔m/s〕混凝土强度换算值〔MPa〕推定混凝土强度推定值〔MPa〕备注1DK56+4002DK56+4063DK56+4154DK56+425表2 混凝土强度换算结果表143.1461540.9242.3462139.0340.6449435.6441.5475240.535.6541.4478640.9641.6474240.5741.0463038.0142.5471940.8244.7468143.6343.0477642.4443.2458039.239.2541.9468440.1641.5481341.4741.7473640.6144.6468543.6243.4469841.5341.6466638.2442.6465939.937.1540.4473838.7641.2465538.7740.4462737.1145.3487447.8243.6481844.0344.5477744.8442.9490544.242.0542.6473742.0642.7475642.4744.0475844.5测线里程桩号测区修正后回测线里程桩号测区修正后回弹值Ｒivi〔m/s〕混凝土强度换算值〔MPa〕推定混凝土强度推定值〔MPa〕备注5DK56+4346DK56+4437DK56+4528DK56+460表2 混凝土强度换算结果表表2混凝土强度换算结果表表2混凝土强度换算结果表测 里程 测区线 桩号

修正后回弹值Ｒi

vi〔m/s〕

混凝土强度换推定混凝土强度 备注算值〔MPa〕推定值〔MPa〕143.0143.0493344.8241.9474240.2344.3478344.6443.3474242.840.2541.6478141.1643.5461641.5743.0482043.9142.7463239.8245.2458642.8343.2458339.8446.2458046.139.8544.3461842.7643.8458641.5743.4470042.7144.7482946.0244.9469344.1342.9462740.0442.8460939.639.6545.3460844.1644.3484446.4743.1474542.9145.0475545.3244.5489646.7343.4476142.8443.0467640.940.2543.9453440.8642.5463140.2742.3472341.39 +470DK5610 +480DK5611 +490DK5612 +495注：各测区的声时值三个〔测距10cm〕，软件自动平均后计算声速值，然后用软件计算出混凝土强度换算值〔或查表〕及计算或确定强度推定值。144.7483546.1243.5465242.1343.2480243.1442.9463540.936.9540.3462636.9640.9465138.2740.9475639.7141.0450336.2242.9455639.7342.2452838.3441.8453837.936.2540.8458737.1640.4460236.8741.9456638.4143.5463841.1241.7461238.0344.4467343.0443.2460340.138.