Installation process of bi-steel Composite plate

Installation construction of bi-steel Composite plate

1 scope

This technology is applicable to multi-layer and high-rise multiple civil composite slabs or panel installation. Conditions suitable for industrial construction we can use.

2 construction preparation

2.1 materials and equipment:

2.1.1 double reinforced composite slab: thickness are divided into 50mm and 63mm series. Plane size with three-mode as a benchmark, 50mm, long-4.2m~6.3M, wide l.5M~3.9m. total 72; 63mm, long 4.2m~7.2m, wide 1.5M~3.9m, total 99. Precast composite slab of laminated surfaces should be smooth differential of not less than 4mm artificial surface, the surface shall not be a porous layer and laitance. BI-steel Composite plate to have a factory certificate.

2.1.2 support joints and rigid frame formwork planks, wooden or shaped pillars should be prepared according to the construction plan.

2.1.3 implement vertical transport machinery, steel measuring tape, crowbar, etc.

2.2 operating conditions:

2.2.1 according to drawings, specifications, laminated sheet set and negotiate requirements, draw laminated slab installation diagram. Which should express laminated slab surface, models, seam dimensions, bearing length of shelving, bearing hard frame formwork, temporary support positions, to laminated slab installation.

2.2.2 checking laminated slabs of quality: check for cracks and defects in detail, checking laminated slab surface quality. If it does not meet the quality requirements may be used. And according to the installation diagram checked laminated slab models and specifications.

2.2.3 check elevations and the axis of the wall or beam. Beam and ring beam reinforcement and templates through yin and pre-screening.

2.2.4 laminated slabs stacked and site requirements:

2.2.4.1 prior copy of the space should be flat, solid, and built 3:7 lime in two steps.

2.2.4.2 stacking position with the lifting point. Under each piece of laminated slabs close to the rings should be placed along the laminated slab length to full length wood, align, alignment, pads, pad real. Different panels should be stacked, piled up plates, overlapping is not allowed. Stacking height should be no more than 6 floors. Conditions should be allowed to go upstairs.

2.2.5 hard around the wall frame formwork and butt joints stiff frame support and temporary support, according to the construction plan has been installed, finished and pre-screening.

3 operational processes

3.1 process flow chart:

Check bearings and joints on the hard frame formwork lifting draw laminated slab elevation → line → laminated slabs →

Adjust supports composite slab using length → finishing laminated board throw bars

3.2 for use on composite slab bearing length is smaller (or not support), it generally should be adopted hard around the wall frame formwork, usually single row of pillars and walls locking, spacing between 60~100cm. Wall or beam top elevation decrease l~3cm. Also located at the seam of hard supporting, typically a double row of pillars, spacing of 60~100cm. Installing laminated slabs should be carefully checked before hard frame formwork supporting system, check the wall or beam axis of the elevation, and rigid frame formwork level cord to the top level, and calibration.

3.3 draw laminated slab lines: Heng Leng, on the walls, beams or rigid frame on the side seam line of position by the installation pictures, and mark Board. Butt joints between 100mm, such as plate arrangement when needed may vary between 80mm~170mm. But larger than 100mm seam should be placed close to one side of the plate boundary. As shown in Figure 4-39.

Board retained in Figure 4-39 diagram

3.4 laminated slab hoisting: laminated slab reserved at the hole, before lifting to clarify its position, clear direction. While checking, remove barriers to rebar in place. Hoisting rings should be reserved position, taking eight rings of synchronous lift. But, should make stacks of plywood as delineated in the alignment plate line, design support using slower annual drop in place, stable implementation.

3.5 adjust the use of laminated slabs bearing length:

3.5.1 in crowbar by supports of drawings using length, gently adjusted. If necessary, to help tighten the hook of the crane ropes (but does not support), supplemented by manual lever adjust the length using together.

3.5.2 drawings no requirements on the bearing length of shelving, when the Board sits on your concrete, usually +20mm (that is 20mm into the bearing). If row plate needs may also change between the +30mm~-50mm. But if the wall thickness is less than 160mm, the cylinder boundary length used should be >0. Must be less than -50mm should be dumped as designed to increase muscle length. Use a length of status as shown in Figure 4-40.

3.5.3 in brick-concrete structure in the plate into the bearing length should be greater than 50mm.

3.6 Summary of design rules, finishing four-week thrown out of reinforced composite slab shall not be bent 90 °, shall not be under the pressure plate.

4 quality criteria

Figure 4-40

4.1 project:

4.1.1 components when lifting the concrete strength must comply with the design requirements and the provisions of the code.

Examination methods: examination components factory and the test of sample cured in same condition report.

4.1.2 concrete composite slab joints must be accurate measurement, concrete compaction, curing full, which provisions must meet the design requirements or specifications.

Inspection method: observation and inspection standard curing period 28D block compression test reports and construction records.

4.1.3 laminated slab type, location, point anchoring must comply with the design requirements and has no damage.

Inspection method: observation or standard checks and inspection lifting records.

4.2 Basic project:

Laminated slab elevation, plasma, plate width, should comply with the design requirements and the provisions of the code.

Inspection method: observation, adequate checks.

4.3 allowable deviation, as shown in table 4-37.

Table 4-37

Project tolerance (mm) method

1 axis displacement 5 foot check

2-storey ± 10 level or standard of inspection

3 Board shelving ± 10 feet in length check

Plaster 5

Don't plaster 3

5 finished product protection

5.1 laminated slab pile up and pile site requirements should be strictly in accordance with 2.2.4 implementation.

5.2 when installing laminated slab cast walls, beams, its construction of concrete strength to achieve 4MPa.

5.3 laminated slab on the left bar (anchorage bars) in the course of stacking, transporting, lifting to be protected may not be repeatedly bent and broken.

5.4 hoisting laminated slabs should not be used "reveals", more block lifted. Should be reserved for the rings, synchronous single lifting with eight points. May not impact laminated slab lifting.

5.5 hard frame formwork supporting system of temporary support should be complete before hoisting. Each Panel in width along the long to take additional full-length muleng as temporary support. Next end all pillars should be pave the way through long hand, and under the scaffold-based soil, levelling, compacting.

5.6 non-arbitrary cut holes in the plate, plate holes if required, mechanical drilling and reinforcement design and collection requirements accordingly.

6 quality problems to be noticed

6.1 overcome plate deflection and crack: rigid frame formwork and seam to support its epithelial elevation must be accurate and must have adequate stiffness, strength and stability, to ensure it is not sinking, not tilted.

6.2 overcoming plate bearing shelve length allowed, hoisting should be carefully adjusted.

6.3 failed boards shall not be lifted in place to check before lifting. Especially the artificial surface of composite slab should meet the requirements, loose layers and laitance should be cleaned to ensure concrete laminated surface well.

7 quality records

The standard quality shall have the following records:

7.1 concrete factory certificate.

7.2 structure lifting records.

7.3 precast hoisting pre-screening.

7.4 Sub-item project technology gives the low-down.

7.5 quality inspection and assessment of the project.

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