by Main cause verification 1: the qualification rate of pre job training is not up to standard.
1.
[verification content]: (1) the proficiency of operators.
(2) Operators’ mastery of hoisting and structural construction specifications and standards.
2.
[verification basis]: the project department formulates the assessment standards as shown in the table below, and the assessment excellent rate is ≥ 95%.
Assessment standard assessment items excellent medium poor assessment requirements theoretical knowledge (100 points) excellent ≥ 90 points 90 points > good ≥ 75 points 75 points > medium ≥ 60 points difference ≤ 60 points excellent rate ≥ 95% operation skills can be operated independently and can cooperate with operation guidance.
Improper operation methods are due to verification 2: the coverage of technical disclosure before construction does not meet the standard.
1.
[verification content]: check the records of technical disclosure.
2.
[verification basis]: the coverage rate of technical disclosure before construction is 100%.
The technical disclosure includes: setting out of component position, hoisting of prefabricated components, deviation correction of prefabricated components, erection of component support system and hoisting safety.
Main reason verification 3: material stacking is not standardized.
1.
[verification content]: check whether the stacking of materials used on site is standardized.
2.
[verification basis]: the materials shall be stacked in the exclusive material warehouse according to the standardization requirements, and the qualified rate of stacking meeting the specification requirements is 100%.
Key factor verification 4: the strength of supporting materials does not meet the standard.
1.
[verification content]: strength test of supporting materials.
2.
[verification basis]: the qualified rate of the test strength of the support frame reaches 100%.
Key factors for pressure test of small steel and support frame verification V: the measurement method does not meet the accuracy requirements.
1.
[verification content]: review the accuracy of the measurement scheme.
2、 [verification basis]: the error between the measured value and the actual value shall not exceed 1mm.
Statistical table of measured deviation value of structural dimension item allowable deviation (mm) Actual value measured value 1 measured value 2 Foundation axis position 10 column centerline position 5 elevation 5 perpendicularity 5 beam centerline position 5 elevation 5 slab elevation 3 stair horizontal position 5 elevation 10 plane position of exterior wall plate or bearing wall and height difference 5 perpendicularity 5 main cause verification VI: instrument accuracy is insufficient 1 [verification content]: measure the perpendicularity of the exterior wall panel of Building 1 with a vertical line and tape measure, and compare the measured value with the actual value.
2.
[verification basis]: the maximum difference between the measured value and the actual value is 1mm.
Main cause verification VII: hoisting machinery is not maintained in time.
Dimension 1.
[verification content]: check the use of truck crane on the construction site.
2.
[verification basis]: the number of shutdown failures of truck crane is less than 1.
Key cause verification 8: the coverage rate of design disclosure does not meet the standard.
1.
[verification content]: check the design disclosure records.
2.
[verification basis]: the coverage of design disclosure before construction is 100%.
Cause verification IX: confusion between deepening drawing and structural drawing 1.
[verification content]: project management’s understanding of design drawings.
2.
[verification basis]: the qualification rate reaches 90%.
Reason for verification X: the lifting scheme is not targeted.
1.
[verification content]: review the lifting scheme.
2.
[verification basis]: the implementability of PC construction scheme reaches 100%.
Assessment criteria assessment items excellent medium poor assessment requirements PC scheme 100 excellent ≥ 90 points 90 points > good ≥ 75 points 75 points > medium ≥ 60 points, difference ≤ 60 points, excellent rate ≥ 95% articles and pictures are only for learning and use, if they involve copyright issues or disagree.
