钢筋分布及保护层厚度检测（电磁感应法）

1、钢筋分布及保护层厚度（电磁感应法）无损检测能力与测评标准一、技能点能力要求能用电磁感应法检测钢筋分布及保护层厚度。二、测评标准序号考核项评分标准分值1检测准备及仪器连接局部（22分）首先开箱清点器具，未清点扣2分。清点完 毕后，测试过程中增补配件扣2分。4被测构件外观检查，对外表不符合要求的位 置及时提出。未检查扣2分，正式开始后提 出扣2分。4按照要求进行有序连接设备。有不满足要求 时，扣2分/项，最多扣4分。2正式开始测试前应开机检查，确定信号线路 通畅。未检查扣2分，未确定线路扣2分。4开始检测时应进行自动调校，调校时远离金 属物，未调校扣2分，未远离金属扣2分。4正确输入被测构件检测参

2、数（直径等），输入 错误或无此步骤扣4分。42现场数据采集准备工作（4分）正确连接仪器设备：信号线连接传感器、主 机，有错插行为扣2分，其他导致测试过程 异常的行为扣2分43数据采集过程（42 分）对纵、横向钢筋进行初步定位：探头有规律地在检测面上缓慢移动（检测过 程探头移动速度不应大于5cm/s）（2分）；初 步判定纵、横向钢筋数量和位置，并在白纸 上标示（2分）。4准确探测纵、横向钢筋位置：6每根钢筋至少探测确定两点，在白纸上画出 每根钢筋两点的连线为钢筋的位置和走向， 遗漏时，扣1分/根，最多扣6分。纵、横向钢筋间距（相邻同向钢筋与钢筋之 间的距离）：采用直尺量取间距，遗漏测量扣1分/处

3、，最 多扣4分；每个间距在两端附近测量两次，精确到1mm, 漏测扣1分/处，最多扣4分；每个间距两次测量结果平均值为钢筋间距测 定值，并修约到1mm,未取平均值扣1分/处， 最多扣2分，未正确修约扣1分/个，最多扣 2分。12横向钢筋保护层厚度测定：探头沿两条纵向钢筋中心线附近，且基本与 横向钢筋垂直方向缓慢移动（2分）；读取每根横筋保护层厚度最小值作为被测钢 筋保护层厚度值，漏测是扣1分/处，最多扣 4分。每根横向钢筋混凝土保护层厚度测量记两 次，漏记时扣1分/处，最多扣4分；两次读数差值应不大于3nnn,两次读数差值 大于3mm时应进行复测调整,否那么扣0. 5分/ 次，最多扣2分。每根钢

4、筋两次测量结果平均值为钢筋保护层 厚度测定值，并修约到Imm,未取平均值扣 0.5分/处，最多扣2分，未正确修约扣0. 5 分/处，最多扣2分。16用虚线标识出保护层厚度测试位置线（1分）；间距测量结果应在白纸上标记出来（3 分，白纸上未标记不得分，标记不清扣1分/ 处，扣完为止）。44检测结果提交（30 分）检测信息填写完整、字迹清楚、按要求正确 填写（错填后经正确方式修改不扣分），涂改 扣1分/处，信息不完整扣2分/处，字迹潦 草无法识别扣2分，错误填写扣2分/处。最 多扣8分。8每根钢筋保护层测试结果较标准值相差不大 于2mm不扣分；相差3mm扣1分，相差土 4mm及以上扣2分，共10分

5、。10每个间距与标准值相差5mm以内不扣分；相差 lOnrni扣1分；相差 15mm及以上扣2分,共10分。10钢筋分布示意图并对钢筋编号。错写、漏写 一项扣1分，最多扣2分。25试验结束后的整理（2分）设备归位：关闭电源，取下激振头、传感器、 信号线、设备清洁、装箱。1现场用具及时上交。1合计总得分100Nondestructive testing capability and evaluation standard of steel bardistribution and protective layer thickness (ElectromagneticInduction Method

6、)Skill requirementsCan use electromagnetic induction method to detect steel bar distribution andprotective layer thickness independently.Evaluation standardSerialnumberExaminationitemMarking criterionScores1Detection preparation and instrument connection part (22 points)First open the box and count

7、the instruments. 2 points will be deducted if the instruments are not counted. After counting, 2 points will be deducted for supplementary parts during the test.4Check the appearance of the component under test, and promptly propose the position where the surface does not meet the requirements. 2 po

8、ints will be deducted for failure to check, and 2 points will be deducted after the official start4Connect devices in an orderly manner as required. If the requirements are not met, 2 points will be deducted per item, and a maximum of 4 points will be deducted.2Before the official start of the test,

9、 it should be turned on and checked to make sure that the signal line is unobstructed. 2 points will be deducted for not checking, and 2 points will be deducted if the line is not confirmed .4Automatic adjustment should be carried out at the4SerialnumberExaminationitemMarking criterionScoresbeginnin

10、g of the test When adjusting, keep away from metal objects. If not adjusted, 2 points will be deducted, and if not away from metal, 2 points will be deducted.Enter the detected component parameter (diameter,etc.) correctly, 4 points will be deducted enter error or without this step by 4 points.42On-

11、site data collection and preparation (4 points)Connect the instrument correctly: The signal line connects the sensor and host machine, 2 points will be deducted for wrong insertion, 2 points will be deducted for other behaviors that lead to abnormal testing process.43Data collectionprocess(42 points

12、)Preliminary positioning of longitudinal and transverse reinforcement: The probe moves slowly and regularly on the inspection surface (the moving speed of the probe during the inspection process should not be greater than 5cm/s) (2 points); Preliminarily determine the number and position of longitud

13、inal and transverse steel bars, and mark them on paper.(2 points).4Accurate detection of longitudinal and transverse reinforcement positions: At least two points are detected for each steel bar, Draw the line connecting the two points of each steel bar on the paper as the position and direction of t

14、he steel bar,when missing, 1 point will be deducted for each steel bar, up to 6 points will be deducted.6SerialnumberExaminationitemMarking criterionScoresLongitudinal and transverse bar spacing (the distance between adjacent bars in the same direction): Use a ruler to measure the distance, 1 point

15、will be deducted for each missing measurement, and a maximum of 4 points will be deducted;Each spacing is measured twice near both ends, accurate to 1 mm, and 1 point is deducted for missing measurement, and up to 6 points will be deducted;The average value of the two measurement results of each spa

16、cing is the measured value of the reinforcement spacing and is modified to about 1mm. If the average is not taken, 1 point will be deducted per place, and 2 points will be deducted at most.If the rounding is not correct, 1 point will be deducted, 2 points will be deducted at most.12Measurement of tr

17、ansverse reinforcement protection layer thickness:The probe moves slowly along the centerline of the two longitudinal bars and is basically perpendicular to the transverse bars (2 points); Read the minimum value of the protective layer thickness of each transverse bar as the thickness of the measure

18、d steel bar protective layer, 1 point will be deducted for each missed test, and 2 points will be deducted at most.The thickness of each transverse reinforced concrete16SerialnumberExaminationitemMarking criterionScoresprotective layer is measured twice, and 1 point will be deducted per place if it

19、is missed, and 4 points will be deducted at most: The difference between the two readings should be no more than 3mm. When the difference between the two readings is greater than 3mm, a retest should be performed, Otherwise, 0.5 points will be deducted for each time, and 2 points will be deducted at

20、 most.The average value of the two times measurement results for each steel bar is the measured thickness of the steel bar protective layer, and it is modified to about 1mm, 0.5 points will be deducted for each place that is not averaged, and 2 points will be deducted at most, 0.5 points deducted fo

21、r each place incorrectly corrected, 2 points will be deducted at most.Mark the protective layer thickness test position line with a dotted line (1 point); Spacing measurements should be marked on paper (3 points, no points if not marked on the paper, 1 point deducted for unclear marks, until all poi

22、nts are deducted)o44Submission of test results (30 points)The test information is filled in completely, the handwriting is clear, and it is filled in correctly as required (No points will be deducted after incorrectly filled in and corrected in the correct way),l point will be deducted for each corr

23、ection, 2 points will be deducted for each incomplete8SerialnumberExaminationitemMarking criterionScoresinformation, 2 points will be deducted if the handwriting is unrecognizable, and 2 points will be deducted for each incorrect filling, with a maximum deduction of 8 points.The difference between the test results of the protective layer of each steel bar is no more than