Concrete Pre-faricated Box Girder

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BOX GIRDER

External formwork of 32/24 meters post-tensioning concrete pre-faricated box girder is divided into sliding mode and
rolling mode; the side form of the first mode can move from one bottom form to the other one which increases the
utilization rate, and decrease the investment for the formwork during construction; the side form of the second mode
is relatively fixed according to the bottom form, and could be dismantled by revolving, which improve the efficiency
of formwork closure.The side formwork unit is mainly 6 meters, the design of the sructure is compact
and reasonable with beautiful and smooth appearance.

■  All the edges of ecternal formwork panels for the box girder have been milled, which ensure

the assembly precision to avoid the leakage of the concrete

■  The bottom formwork unit is 3 meters to facilitate the installation and anti-arch adjustment

■  The bulkhead is designed to envelop the sideform,which can be wholely assembled, making the removal, installation and adjustment much easier.

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Q:Why does the formwork support only three faces?
Only the surface and the side surface of the template, when pouring the concrete pouring can together from above.
Q:When the height of the beam is large, the reinforcement of the beam is bound on the bottom of the beam
When the beam height is large, the beam of the steel beam in the bottom of the bundle, which means that the beam of the overall weight of steel, in the Liang Dimo binding, and then seal the side template, and then pouring concrete
Q:In the end is how to calculate the area? Do you want to deduct the board
The general situation is calculated according to the contact area between the concrete and the template
Q:What is the formula of beam slab formwork
Si=F*A*B, formula, F coefficient, A, length, B width or height.Such as triangle F=0.5, A for the bottom edge of the length, B is high.
Q:How to calculate the length of the beam, beam template area
This is the case: (7800-600) * (800*2+400) forgot, 800 also minus plate thickness
Q:What is the demolition order of the construction template
1 demolition vertical face template, should be carried out from top to bottom; demolition of the larger span of the beam pillar, should start from the middle, respectively, to the two ends.2 demolition of beams and floor bottom mold, should loosen the wedge or lower bracket, then by block or patch removal
Q:Remove the larger span of the beam pillar template why should be removed from the middle to the two ends
When the formwork of the beam is not removed, the load of the beam is evenly distributed. If the two ends of the span from the demolition of the words, the load is borne by the beam at both ends of the column and the template in the cross, when the removal of the template in the cross, the beam is likely to produce cracks and damage. Only from the cross to the ends of the removal, the load is evenly distributed to the ends of the column, the beam will not be destroyed.
Q:How to support 6m arc beam template how to set up?
After setting out in accordance with graphics support ah. If the curvature is large, it can be approximated by linear segmentation.
Q:When the main beam is connected with the secondary beam, the area of the template is calculated
It would take the high beam length reduced thickness, and by 2, the last plus beam bottom
Q:How to control the elevation of the beam bottom and the axis position
The axis is controlled by hanging the ball down to the lower floor axis and the axis control line.

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