The method of constructing column formwork to meet the technical requirements and ensure the quality of the work is an important step. It is not only the place where the bearing creates sustainability but also determines the surface quality for the concrete structure.
Formwork at the construction site is temporary molds made of processed steel and wood to shape concrete structures. Usually called construction formwork or construction formwork.
After erection, use a square ruler to check the verticality of the geometric dimensions of the formwork, then proceed to pour concrete. To adjust the lashing columns anchoring the formwork by means of ropes with stiffeners. The material used for 18mm thick plywood formwork uses 50x50 box iron as a nest to create horizontal ribs. Anti-bulging columns using phial pulleys 12. Steel pipe supports with stiffeners.
- Method of installing column formwork:
+ First, determine the horizontal and vertical center of the column, draw the cross-section of the column on the ground and floor.
+ Pin the frame, fix the column base with the wooden cushions already placed in the foundation block to build the column formwork.
+ Build the inner array to the outer array one by one, then nail to link the 4 arrays together, install the shackles, wedge tight.
+ Use a plumb line to check the heart and verticality of the column.
+ Anchor to hold and support vertical columns (fixing column formwork).
+ For columns with large size, thick reinforcement, one side can be erected in advance or set up a 3-sided formwork box, adjust and fix the formwork, after erecting the reinforcement, erect the remaining formwork surface. shackles to fasten the planks together
Pithole formwork, foundation deck, foundation beam, tunnel wall. Use plywood as formwork to form piles using iron box 50x50 as nesting to create vertical slopes. Positioning connection of 12 ribbed iron pile formwork for concrete lining and support to the wall of the pile pit (sliding culvert board has been laid) distance a=500/bar to ensure stable and solid formwork
After erection, use a square ruler to check the shape and size of the formwork. Plank flat surface. tight seal, no loss of cement water
Machining flat formwork with correct geometric dimensions to make beam formwork using iron scaffolding and steel support trees as a system of support trees for beam formwork above iron scaffolds ordered iron box 50×100 tightly linked with scaffolding to support the bottom beam.
Before installing the formwork, use a hydraulic machine to guide the standard reinforcement of the work to the columns that have been poured with concrete to get the elevation reinforcement of the bottom of the momentum.
First, spread the bottom plank first, then proceed to the wall board and use a wooden brace to hold the foot (a=300) to position the geometrical dimensions to keep the formwork stable.
Close the bugs to keep the bottom of the momentum and spread the beam system to support the floor formwork (of 50×100 box iron) at a distance of a=500 using 50×100 box iron as a stand to connect the floor support beams with the 50× box iron 100 already spread on iron scaffolding.
After erecting the formwork, use a theodolite machine and a square ruler to check the flatness of the centerline and the dimensions of the members.
Materials used for formwork: 18mm thick plywood using 50×50 box iron as a vertical rib brace, 50×100 as a horizontal rib brace. To prevent bulging use phi 12 pulley.
Trees are mainly supported by scaffolding, iron and steel pipes with stiffeners.
Construction of formwork is a decisive factor to the stability of Concrete, the reinforcement will fix the shape and size. Make sure that the concrete is not lost when pouring concrete.
