by Project Overview The Fujian Food Inspection and Testing Laboratory Building is located in Xiufeng Road, Xindian Town, Jin’an District, Fuzhou City.
The total construction area of the project is 16971 square meters, including 7814 square meters for the new provincial food inspection physical and chemical laboratory; The biological laboratory of the new provincial food testing experimental building covers an area of 9157 square meters.
The bid price is about 103 million yuan.
The total construction period is 480 calendar days.
The prefabrication rate of the project is 40%, and the main prefabricated components are prefabricated columns, prefabricated beams, prefabricated composite panels, and prefabricated exterior wall panels.
The main structure of the project includes five types of components, including grouting sleeve connection precast column, four side reinforced precast composite floor, precast beam and precast stair, with the maximum component weight of 11.02 tons.
The external parapet wall is made of stone and prefabricated external wall panels.
The internal partition wall is made of light steel keel and light partition wall.
The equipment pipeline is made of SI pipeline separation technology.
The cast-in-place shear wall part is made of aluminum formwork to achieve plasterless construction.
The whole building is decorated and delivered with great technical difficulty.
▲ Reinforcement construction in superimposed cast-in-situ area ▲ The project management team of aluminum alloy formwork construction of prefabricated beam column joints explored advanced construction technologies such as prefabricated component hoisting construction, reinforcement sleeve grouting connection construction, and aluminum alloy formwork construction of prefabricated beam column joints.
The project department has used the remote video monitoring system, intelligent construction quality APP and security APP, two-dimensional code information storage, RFID whole process traceable information technology, and BIM and other advanced technologies.
In order to ensure the accuracy of the project construction, CSCEC Science and Technology Fujian Co., Ltd., which is responsible for prefabricated components, adopted the idea of “template leading the way” and decided to build a model building first.
The model building is 8m long, 6m wide and 3.6m high, including 4 columns, 7 beams, 3 composite plates, 1 platform beam plate, 2 stair walls and 2 stair flight.
The type of components used is the same as that of the comprehensive building project of CSCEC Fujian Branch (the first green three-star fully assembled project in Fuzhou).
This installation is equipped with 4 workers, 1 25t truck crane, and it took 7 steps to complete the construction: 01.
Place the fine samples of precast columns and beams on the foundation ground, Provide position reference line for column beam installation and adjustment 02.
Lift prefabricated column 03.
Install stair wall 04.
Install top beam bracket and beam plate support at the top of column 05.
Lift prefabricated beam 06.
Lift prefabricated composite plate 07.
Lift prefabricated staircase four piece completion construction overview ▲ Fujian Food Inspection and Testing Laboratory Building project introduction (it is recommended to watch under wif) Layout of the construction site ▲ Set an entrance near Xiufeng Road at the northeast corner of the construction site, and set a tower crane at the east and west sides of the main building.
▲ After the prefabricated components enter the designated unloading point, lift them to the component stacking point.
Building assembly technology introduction 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 beams, prefabricated stairs, prefabricated external wall panels, etc.
Prefabricated construction process introduction Prefabricated column hoisting ▲ Base course cleaning ▲ Surveying and setting out: snap the positioning line of prefabricated column on the floor, and place shims under the column to accurately adjust the component elevation.
▲ Member alignment installation: lift slowly.
After the column foot is 300-500mm above the column head reinforcement on the floor, the worker shall help to slowly put the column foot in place and align the column positioning line with the floor positioning line.
▲ Installation of temporary diagonal bracing: after the column is hoisted in place, it shall be fixed with diagonal bracing in time, and then the verticality shall be adjusted to meet the requirements by adjusting the length of diagonal bracing.
Grouting connection of reinforcement sleeve ▲ seal the joints around the column foot.
▲ Mix grouting materials.
▲ Flow detection: each time the grouting material mixture is mixed, the flow detection shall be carried out.
▲ Grouting: grouting material is injected from the grouting hole at the bottom of the component.
▲ Grouting confirmation and hole plugging: When the grouting material overflows from the hole, it is deemed that the hole has been grouted and sealed with a rubber plug.
Grouting shall be deemed to be completed when cylindrical grout overflows from all grout outlet holes of the column.
Installation of prefabricated beam ▲ Before hoisting the prefabricated beam: first erect the support frame under the beam position, and adjust the height of the embedded bracket plate and the top elevation of the timber according to the 1m line of the structure.
▲ Positioning: the beam is initially positioned on the column head bracket plate, and the beam is accurately calibrated with the help of the beam positioning line on the column head.
Installation of precast slab ▲ Setting of slab bottom support: Before hoisting precast slab, the support frame shall be erected under the slab.
▲ Placement in place: The hoisting shall be carried out in sequence.
After the plate is hoisted 3-6cm above the beam, adjust the position of the plate to stagger the plate reinforcement and beam stirrup, so as to facilitate the placement.
Installation of external wall panels ▲ measurement and setting out: snap the location line of the wall panel on the floor surface, recheck the floor elevation, and place the adjusting gasket at the bottom of the wall.
▲ Hoisting: the external wall panels shall be hoisted in sequence according to the number prepared in advance.
▲ Placing in place: When the prefabricated wall is about 1000mm from the floor level, the hoisting personnel will guide the prefabricated wall to slow down 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 verticality 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 beams and slabs around the stairs is completed, measure and snap the control lines at the ends and sides of corresponding stair components.
▲ Place in place: after the stairs are hoisted 30-50cm above the beam, adjust the position of the stairs so that the edge line of the plate is basically consistent with the control line.
▲ Fine adjustment in place: use crowbars or other tools to accurately position components according to the set out stair control line.
▲ Connection between stairs and cast-in-place parts: after the calibration of stair flight, connect the points.
The above installation method is adopted to complete the application of BIM technology in the construction of the upper main structure.
BIM technology is used in the project to conduct full life cycle management, establish BIM component models, and complete the statistics of component disassembly, prefabrication rate, assembly rate and comprehensive collision detection of professional models..
