The cause of the elevation of the exit building template and the solution
1, the exit of the building template elevation deviation phenomenon: measurement, found that the height of the concrete structure layer and embedded parts, reserved hole elevation and construction design design standard deviation between the deviation.
2, export building template elevation deviation of the prevention and control measures:
(1) each floor set enough elevation control points, vertical building template root to be leveling.
(2) the top of the building template set high mark, in strict accordance with the mark construction.
(3) building floor elevation from the first floor of ± 0.000 elevation control, is strictly prohibited layer by layer to test, to prevent the cumulative error, when the building height of more than 30m, should be set elevation control line, each layer elevation test points should be no less than 2 for review.
(4) staircase building template installation should consider the thickness of the decoration layer.
(5) embedded parts and reserved holes, should be installed before the control with the drawings, confirmed correct and accurately fixed in the design location, if necessary, by welding or box method to fix it, in the pouring of concrete, along the Around the stratified evenly pouring, is strictly prohibited to hit and vibration embedded parts export building template.
3, export building template elevation deviation of the reasons for analysis
(1) floor no elevation control points or control points less than the control network can not be closed; vertical building template roots are not leveling.
(2) the top of the building template without marking, or not marked by the construction.
(3) high-rise building elevation control line too many times, the cumulative error is too large.
(4) embedded parts, reserved holes are not fixed prison, construction did not pay attention to construction methods.
(5) staircase building template does not consider the thickness of the decoration layer.
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