Construction scheme of wooden round post formwork Installation steps/construction plan
Step 1: prepare the materials to be used in the installation and reinforcement of the supporting mould of circular column formwork: no.19 wrench, wooden square, steel pipe, fasteners, screws, meter ruler, marker pen, hammer, nail, theodolite, plumb instrument, 4 pieces of wood round formwork with diameter of 1 meter and height of 3 meters, and 2 pieces with height of 1 meter.The second step: the establishment of a flat installation platform, wooden construction circular formwork erected in the installation platform after the bottom of the gap, the use of cement mortar to fill the joint, to prevent grouting at the bottom leakage.
Step 2: two people take a diameter of 1 meter and a height of 3 meters and 1 meter of the formwork, using concave and convex groove butt, buckle in the outside of the steel cage.After that, the matching steel hoop should be used to tie the first hoop at the bottom first (warning: when installing the large-diameter wooden circular column formwork, iron wire can be used to help tie the first hoop). The joint between the formwork and the mounting platform should be filled with cement mortar.
Step 3: take two formworks with a diameter of 1m and a height of 3m and install them above the previous 1m and 3m formworks by dislocation lap joint.At this time, the two semicircle joints above and below the formwork shall be tied with the second steel hoop, which shall completely cover the joint position.
Step 4: repeat step 4 above to install the remaining two formwork at the top and tie a third steel hoop around the newly created seam.At this point, the six plates are installed in place, with integrity and a certain degree of verticality.
Step 5: install the steel hoop from bottom to top step by step. Use a meter ruler to measure the outer wall of the building circular column formwork at a certain distance and mark it with a marker. Nail it with a hammer at the mark.With the three marked nails as the reference, the matching steel hoop shall be installed horizontally. Two people shall work together from the bottom to the top. One person shall be responsible for the level of the steel hoop and the other person shall be responsible for turning screws.Note here that all screws must not be mounted on the same vertical line.
Step 6 : after the installation of all steel hoops, reinforce 4*10 wooden squares in the vertical direction around the circular column formwork, increase the stressed area of the steel pipe and formwork, protect the formwork from being damaged by the steel pipe, and increase the overall stability.
Step 7: use steel pipe to set up the frame to adjust the verticality, 1-1.5m a frame, the higher the height of the column, the higher the density of the frame.On the one hand, the frame can adjust the verticality, and on the other hand, it can buffer the vibration pressure, and play the purpose of secondary reinforcement.
Step 8: the concrete can be poured after the installation of the supporting mold is confirmed qualified by the supervision. The concrete can be poured in one time within 7 meters of the diameter of one meter. If the diameter is too large or the height is too high, it is recommended to pour in sections with the interval of 20-30 minutes.
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