2.

The stacking sequence of the laminated plates shall be from top to bottom according to the hoisting sequence.

Wheel Spacer

The key points of the construction of the composite plate with engineering characteristics are: deepening the design of precast components and industrialized processing and manufacturing of precast components; Lifting and installation of on-site assembly components; Selection of supporting machinery; The connection between precast structure and cast-in-place structure, professional and multi type construction labor organization.

The upper and lower layers of square wood should be aligned, and the number of stacked layers should not be more than 6, and the height should not be more than 1.5 m.

Therefore, finished products shall be protected for members during construction on site.

The top surface of the support shall be strictly leveled to ensure that the bottom surface of the bottom plate is flat.

The support requirements are as follows: 1) The starting distance between the vertical pole and the wall is ≤ 400mm; 2) The lower part of the support shall be equipped with a bottom broom, which shall be no more than 450mm from the floor and shall be set in full length; 3) The top of the vertical pole is provided with adjustable support, and the support elevation is adjusted.

The PC structure is produced and processed in a centralized factory, and its quality is strongly guaranteed with few factors affecting its quality.

1.

When the laminated plates are stacked, the bottom shall be provided with skids to ensure that the lowest laminated plate is more than 10cm above the ground; The cushion wood should be placed between the upper and lower laminated plates along the vertical stress direction, and should be placed horizontally in layers.

The practice shows that taking measures such as supporting keel and independent upright pole can effectively improve the installation and positioning accuracy of laminated plates and ensure that the bottom joint of the plates meets the design requirements.

The placement of skid is shown in Figure 3, and the model of skid is 100mm × 100mm × 300mm, and the distribution of skid is shown in Figure 4.

Vertical and horizontal spacing of vertical pole 900mm × 900mm, the step distance of horizontal tie rod is 1200mm, and the whole hall shall be erected.

With the construction of more and more public building projects all over the country in recent years, people pay more and more attention to the structural safety of public buildings.

2.3 The hoisting process shall list the hoisting sequence of each component on each floor of each building according to the structural layout plan of the laminated plate in the design drawing, and guide the on-site hoisting construction strictly according to the hoisting sequence (the position of hoisting points will be marked on the laminated plate, and attention shall be paid to confirmation during hoisting) (Figure 5).

The arrangement direction of main beam shall be parallel to the longitudinal direction of column, the spacing between small beams shall be 300mm, and the specification of panel formwork shall be 1830mm × 915mm × 12mm formwork, fully paved.

The support system is made of wood buckle quick release frame 4.8 × 2.8 Adjustable top support, 48 for main beam × 2.8 Double steel pipe, rectangular square steel pipe 40 for small beam × forty × 2.5.

Combined with the construction site, from the engineering construction characteristics, the design of precast components is deepened and precast components are manufactured in the factory; Hoisting of on-site assembled components; Selection of supporting machinery; The connection between precast structure and cast-in-place structure, and the organization of professional and multi type construction labor force have described and analyzed the construction technology of cast composite slab in detail.

2.4 The installation steps are as follows: 1) Measurement, setting out and positioning: measure and locate the position of the laminated plate according to the relevant drawings and snap the line; 2) Erection of formwork support frame: according to the formwork elevation and construction scheme requirements, the erection of laminated plate support frame shall be carried out; 3) Inspection and acceptance of components entering the site: recheck the size and appearance quality of components, check the number of components entering the site, make self inspection records, and notify relevant units to carry out acceptance; 4) Installation of slings: select appropriate slings and hooks according to the size of the laminated plate, as shown in Figure 6; 5) Installation and positioning: according to the installation sequence of the laminated plate, and according to the line position and elevation of the plate surface, slowly fall down on the plate surface; 6) Adjustment: precisely adjust the elevation according to the 50 control line; 7) Hook removal: after the top support is stably stressed, remove the hook to lift the next plate..

The cushion wood should be placed 200 mm to the end of the plate and at the mid span with a spacing of no more than 1.6 m.

2) The toilets, kitchens, balconies and other parts of the project floors adopt cast-in-situ structures, and other parts adopt laminated plates; The precast thickness of the laminated plate is 60mm, and the cast-in-situ layer is designed to be 70mm thick, with the total thickness of 130mm; Outward reinforcement shall be reserved on four sides of the laminated floor, as shown in Figure 2.

The exposed length is ≤ 300mm, as shown in Figure 4; 4) A vertical cross bridging is set every 5~8m in the longitudinal and transverse directions of the whole formwork support system.

The main advantages of on-site implementation are energy conservation and environmental protection, shortening the construction period, and reducing environmental pollution.

At present, the building structure is basically reinforced concrete cast-in-situ structure, which is difficult to manage on the construction site, with a wide range of safe and civilized work and low level; The waste of resources such as reinforcement and concrete is large and widespread; In addition, there are many common problems in the molding quality of cast-in-situ concrete, such as structural formwork expansion, cracking and leakage, poor molding appearance, long construction period, high labor cost, etc.

1) In combination with the side view of the laminated plate of this project, the shaded part is the cast-in-place part; The rest are precast laminated slabs; The lap width of the seam between the laminated plates is 300mm, as shown in Figure 1.

In order to avoid that the wooden cushion block and the plate are not closely cut, the contact surface between the upper and lower layers of square wood should be leveled and shock absorption treated with auxiliary soft materials, Ensure that the force is uniform.

Laminated slab construction technology 2.1 Laminated slab stacking mode cast structure construction system is a new process, which is difficult and dangerous for workers to operate, among which the control of slab surface elevation is required to be accurate; Finished products of laminated plates shall be protected during transportation and on-site storage to prevent permanent damage to members during transportation and hoisting.

2.2 The formwork support system shall be assembled after the formwork support position is determined according to the drawings.