by Project Overview: Fujian food inspection and testing laboratory building project is located in Xiufeng Road, Xindian Town, Jin’an District, Fuzhou City.
The total construction area of the project is 16971 square meters, including the newly built provincial food inspection physical and chemical laboratory with a construction area of 7814 square meters; The biological laboratory of the new provincial food testing laboratory building has a construction area of 9157 square meters, a winning bid of about 103 million yuan, and a total construction period of 480 calendar days.
The prefabrication rate of the project is 40%, and the main prefabricated components are prefabricated columns, prefabricated beams, prefabricated laminated plates and prefabricated external walls.
The main structure of the project includes five types of components, including prefabricated columns connected by grouting sleeves, prefabricated composite floors with four sides of reinforcement, prefabricated beams and prefabricated stairs, with the maximum component weight of 11.02 tons.
The peripheral retaining wall adopts stone anti striking prefabricated external wall panel, the internal partition wall adopts light steel keel light partition wall, the equipment pipeline adopts Si pipeline separation technology, and the cast-in-situ shear wall adopts aluminum formwork construction technology to realize plastering free.
The whole building is fine decorated and delivered, which is difficult in technology.
▲ reinforcement construction in the superimposed cast-in-place area ▲ construction of aluminum alloy formwork for prefabricated beam column joints the project management team explored advanced construction technologies such as hoisting construction of prefabricated components, grouting connection construction of reinforcement sleeves, and construction of aluminum alloy formwork for prefabricated beam column joints.
The project department applies advanced technologies such as remote video monitoring system, intelligent construction quality app and security app, two-dimensional code information storage, RFID whole process traceable information technology, and BIM.
Model first in order to ensure the accuracy of engineering construction, CSCEC technology Fujian Co., Ltd., which is responsible for prefabricated components, adopted the idea of “model guide” and decided to build a model building first.
The model building is 8 meters long, 6 meters wide and 3.6 meters high.
It includes 4 columns, 7 beams, 3 laminated plates, 1 platform beam plate, 2 stair walls and 2 stair sections.
The type of components used is consistent with the comprehensive building project of CSCEC technology Fujian Co., Ltd.
(that is, the first green three-star fully assembled project in Fuzhou).
This installation is equipped with 4 workers and 1 25t truck crane.
It takes 7 steps to complete the construction: 01.
Place the prefabricated column and prefabricated beam detail sample on the foundation ground, Provide position reference line for column and beam installation and adjustment 02.
Hoisting prefabricated column 03.
Installing stair wall 04.
Installing top beam corbel and beam plate support at the top of column 05.
Hoisting prefabricated beam 06.
Hoisting prefabricated laminated plate 07.
Hoisting prefabricated stair four piece set completion construction overview ▲ introduction to Fujian food inspection and testing laboratory building project (it is recommended to watch under WIF) Construction site layout ▲ one entrance and exit is set at the northeast corner of the construction site near Xiufeng Road, and one tower crane is set at the East and west sides of the main building.
▲ after the prefabricated components enter the designated unloading point, the components shall be hoisted to the component stacking point.
Introduction to building assembly technology: the upper part of the project adopts the assembly frame shear wall structure + prefabricated external wall panel system.
The prefabricated components include: Prefabricated columns, prefabricated composite beam plates, prefabricated stairs, prefabricated external wall panels, etc.
Prefabricated construction process introduction: Prefabricated column lifting ▲ base course cleaning ▲ surveying and setting out: snap the positioning line of prefabricated column on the floor, and place the gasket under the column to accurately adjust the component elevation.
▲ alignment installation of components: slowly lift the column base.
After the column base is 300-500mm above the floor column head reinforcement, the workers will help to slowly put the column base in place and align the column body positioning line with the floor positioning line.
▲ installation of temporary diagonal support: after the column is hoisted in place, it shall be fixed with diagonal support in time, and then the verticality shall be adjusted to meet the requirements by adjusting the length of diagonal support.
Reinforcement sleeve grouting connection ▲ sealing joints around the column base.
▲ mixing grout.
▲ fluidity test: fluidity test shall be carried out for the mixture of grouting materials each time.
▲ grouting: the grouting material is injected from the grouting hole at the bottom of the component.
▲ confirmation of grout discharge and hole plugging: when the grouting material overflows out of the cylindrical slurry from the grout discharge hole, it is deemed that the grouting of the hole is completed and sealed with a rubber plug.
The grouting is deemed to be completed after all grout outlets of the column have spilled cylindrical grout.
Installation of prefabricated beam ▲ before hoisting of prefabricated beam: the support frame shall be erected under the beam position first, and the height of the embedded corbel plate and the top elevation of the timber shall be adjusted according to the 1m line of the structure.
▲ positioning: the beam is initially placed on the bracket plate of the column head, and the beam is accurately corrected with the help of the beam positioning line on the column head.
Installation of prefabricated slab ▲ setting of slab bottom support: before hoisting the prefabricated slab, the support frame shall be erected under the slab position.
▲ placing in place: the lifting shall be carried out in sequence.
After the plate is lifted to 3-6cm above the beam, adjust the position of the plate so that the plate reinforcement and the beam stirrup are staggered to facilitate placement.
Installation of external wall panel ▲ measurement and setting out: snap the positioning line of external wall panel on the floor surface, recheck the floor elevation, and place the adjustment gasket at the wall bottom.
▲ lifting: the external wall panels shall be lifted in sequence according to the number prepared in advance.
▲ placing in place: when the prefabricated wall is about 1000mm away from the floor level, the hoisting personnel will guide the prefabricated wall to drop slowly through the wall position control line.
▲ installation of temporary diagonal bracing: after the wallboard is installed in place, it shall be fixed with diagonal bracing in time, and then the perpendicularity shall be adjusted to meet the requirements by adjusting the length of diagonal bracing.
Installation of prefabricated stairs ▲ measurement and setting out: after the pouring of beam slab around the stairs is completed, the control lines at the ends and sides of corresponding stair components shall be measured and popped.
▲ placing in place: after the stair is hoisted to 30-50cm above the beam, adjust the position of the stair to make the board edge line basically coincide with the control line.
▲ fine adjustment and positioning: according to the released stair control line, use crowbar or other tools to accurately position the components.
▲ connection between stairs and cast-in-place parts: after the calibration of the stair section, the connection point shall be carried out.
The above installation method is adopted to complete the application of BIM Technology for the construction of the upper main structure.
BIM Technology is adopted for the whole life cycle management of the project, and BIM component model is established to complete the component splitting, prefabrication rate, assembly rate statistics and comprehensive collision detection of professional models..
