Erection quality control (1) prepare formwork and related materials according to the formwork configuration drawing of each room and the material consumption table of each room.
(3) after the support is supported, set the early removal bracket, remove the head as soon as possible, install the bolt and bracket, and adjust the accuracy of elevation and position.
(4) After the primary and secondary keels are in place, remove the head as early as possible and adjust the height of the top plate to 1 ~ 3mm lower than the secondary keel to supplement the shrinkage effect.
Safety and environmental protection measures (1) formulate safety technical measures and conduct safety technical disclosure before construction; Sufficient safety factor shall be reserved when determining the formwork support lattice.
As the early removal formwork system is more and more widely used in practical engineering construction, we have sorted out the key points of construction.
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(3) All the erected poles after early removal shall be removed when the concrete strength can support its own weight and construction load under the condition of full span.
Key points of removal process (1) check whether the top plate of the early removal head is under the formwork.
(2) When the concrete strength reaches 50% of the design strength, the bracket, formwork and square timber can be removed at the same time.
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(3) Sufficient lighting facilities shall be ensured for night construction, and safety officers shall be assigned to patrol.
(2) The inspection shall be strengthened during construction.
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Construction precautions (1) if the formwork is stopped in the process, reliable support must be set to prevent falling injury.
(2) The wooden board shall be laid under the vertical pole, and the vertical poles of upper and lower floors shall be aligned to ensure that the column can effectively transfer the load.
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The early formwork removal system has the advantages of standardized construction process, fast material turnover, low investment, significant economic benefits and short construction period, which is conducive to civilized construction and on-site management, with light labor intensity and high work efficiency.
(2) when removing the formwork, a short scaffold board shall be paved on the horizontal tie rod at the lower part of the adjustable support top.
If the distance between the top plate of the early removal head and the formwork is greater than 3mm, it cannot be removed early.
When transferring the formwork, it shall be connected with each other and throwing is strictly prohibited.
Technical quality requirements (1) ensure that the supporting part of the supporting roof has sufficient supporting area, the base is solid, and drainage measures are set.
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(3) The flatness error of formwork surface shall not be greater than ± 5mm; The surface elevation error of two adjacent plates shall not be greater than ± 2mm.
(5) The supporting structure shall form a space stable structure before the formwork is removed early to avoid the structure bearing part of its own load in advance.
(3) The dismantled formwork system shall be collected and utilized, and the waste materials shall not be discarded at will to reduce construction pollution.
The order must be observed during formwork removal, and random operation is strictly prohibited.
(4) When removing the formwork, do not strike one end of the cross bar, and do not loosen the lead screw of the early removal head.
When the floor is high, a scaffold board shall also be paved on the horizontal tie rod to ensure the stability of the horizontal tie rod.
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(2) The width error of formwork joint shall not be greater than 1.5mm; The contact surface between formwork and concrete must be cleaned and anti bonding, and the cumulative area of mortar adhesion shall not be greater than 1000C ㎡.
