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Steel Formwork Sufficient Strength, Stiffness And Stability
- Aug 10, 2017 -

Attentions of steel formwork construction

1. The construction uses the template to use 2MX1.5m of the stereotypes steel mold assembled, the template has sufficient strength, stiffness and stability, can withstand the pouring concrete gravity, side pressure and the construction may exist in the load. The Φ50 steel pipe is used as the transverse and vertical stiffening rib of the formwork. The inside of the formwork is made of precast same-grade concrete cushion in the steel bar and formwork, the thickness of the protective layer, and the outer side of the steel or square wood and the wall of the foundation pit, the position is accurate. Erection of scaffold with φ50 steel pipe in formwork for four weeks, easy for formwork installation and concrete pouring

2. The joints between the templates are sealed with double-sided tape, and no leakage slurry shall be produced. The contact surface of the formwork and concrete must be flat and smooth, and the surface of the template will be coated with a release agent. The lever on the template is threaded and is fitted with a washer.

3. Before pouring concrete and pouring process, the template should be inspected.

4. Before pouring concrete should check whether there is debris in the template, whether there is a gap between the template and the hole, or should be promptly clear the template of debris. When the template has gaps and holes,Steel Formwork should be blocked, not leaking slurry.

During the construction process, it is necessary to ensure the accuracy and accuracy of formwork installation, and to prevent template shift and protruding when installing side templates. The base side die can be set up outside the template support fixed. After the template is installed, the plane position,Steel Formwork the top elevation and the vertical and horizontal stability should be checked to ensure that the allowable deviation deformation value is not exceeded.

During the installation process, the template must be provided with an overturn-proof facility.

After lofting, the elevation of the high and low parts is measured, and the position and elevation of the template are controlled.

Steel formwork should be used before the formal installation of the surface of the floating rust removal, and oil evenly daub the template surface to ensure that after the demolition of the concrete surface smooth and concrete do not touch the template.

According to the accuracy of the calibration template installation, Curve section adjusts the curve of the template by comparing with the drawing line, and the adjustment is made from the middle to the two sides to make sure the curve is straight.

After the completion of the template installation from the outside with the appropriate amount of mortar to seal the contact surface and template seam to prevent leakage.

Prevention of quality defects

(1) Large formwork construction, so that the external template internal shrinkage 5~10mm thickness, the upper and lower layer can be separated by the internal contraction position of its continuity, to avoid the upper wall template affected by lower-level bias.

(2) in the construction of the upper shear wall can be at the seams to shrink the position of the square wood, to ensure that the upper wall of the correct location and the bottom of the wall does not leak slurry.

(3) Strict control of the wall template verticality and support stiffness, to ensure that the wall vertical, reduce the wall of the top offset.

(4) The external end of the positioning bar can not be top off the large formwork when the steel bar of the exterior wall is welded.

(5) The roof concrete construction, will make the exterior wall wall thick scope to be made the slope, outside high inside and low, the lowest place and the roof standard Gao Shanping, the external wall part installs the large formwork to be close to the high guide wall, and at the bottom pastes the sponge strip, prevents the leakage slurry.