Key points of design, construction and acceptance of prefabricated buildings (with node detail and cost comparison)
Tongue and groove and anti-corrosion wood are set at the upper and lower openings and sides of the window opening.
2、 Standardized design 1.
A reinforcing steel is set at the bottom to strengthen the overall stiffness of the wall to ensure that the wall will not be damaged due to the self weight of the wall during wall hoisting.
On the premise of ensuring structural safety, the types of components and the number of factory molds shall be reduced as much as possible.
The reserved reinforcement on one side of the prefabricated exterior wall panel wall is an open hoop, and the reinforcement length is 180mm.
The PCF plate is connected with the prefabricated external walls on both sides by setting L-shaped connection angle iron, and the model of angle iron is 140 × 10, 100mm long.
3.7.
The reserved hole node is designed, and the reserved hole of the external rack adopts the horn shape: the hole diameters at the inner side of the inner leaf wall, the outer side of the inner leaf wall and the outer side of the outer leaf wall are 30mm, 40mm and 60mm respectively.
The extended reinforcement of the lower wall is inserted into the cavity of the upper wall sleeve, and then injected with high-strength grouting material for anchorage.
Polyethylene foam plastic rod is inserted into the specified depth to ensure that the building fire-resistant sealant can penetrate into a certain depth and play a sealing role.
The reinforcement in the prefabricated wallboard is connected with the grouting sleeve through mechanical connection.
4、 Assembly construction 1.
The manufacturer of prefabricated components used in the project is CSCEC Technology Wuhan Co., Ltd.
Through this groove, the dislocation caused by the floor elevation control deviation or floor thickness deviation shall be reserved.
Door opening details of door and window nodes are designed.
The balcony and air-conditioning board nodes are designed to be prefabricated.
The arrangement sequence of components in the prefabricated component storage yard shall be planned in advance.
When installing the corner PCF plate, it shall be preliminarily fixed by angle iron to ensure the flatness and joint between the PCF plate and the external walls on both sides; The horizontal overlap between the laminated plate and the end support is designed to be 10mm.
The non sleeve area is directly connected by injecting high-strength grouting material, and the cast-in-situ slab reinforcement extends into the prefabricated outer wall for bending and anchoring.
Plane layout road layout: the on-site construction road shall be set as a ring road as far as possible, and the component transportation road shall be set as a heavy-duty road according to the load of component transportation vehicles; The combination of permanent and temporary roads shall be considered as far as possible, and the fabricated pavement shall be adopted.
3.2.
Storage yard layout: the storage yard for hoisting components should meet the needs of one-day construction, and reserve space for future decoration and equipment installation.
The dn75pvc direct head of prefabricated external wall and insulation board shall be embedded in the prefabricated components in advance, and the dn75pvc pipe of post cast wall board shall be connected on site.
3.1.
One end of the internal anchor bar is anchored into the inner leaf wall, one end is anchored into the outer leaf wall, and the 50mm thick anti-corrosion wood is 15mm into the outer leaf wall and 5mm into the inner leaf wall.
3.5.
The exterior walls are cast-in-situ concrete, rock wool plugging, waterproof cavities, polyethylene foam rods, and building weatherproof sealants, from inside to outside.
Air conditioning holes shall be reserved in prefabricated wallboard.
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Trapezoid Rubber Magnetic Chamfer
The balcony and air-conditioning board are cantilever structures, which are connected with the floor by throwing reinforcement.
Standardized component splitting design the component factory carries out the splitting design of prefabricated components according to the design drawings.
Construction drawing design standardized construction drawing design needs to consider industrialized buildings for standardized design, module assembly through standardized modules, standardized components and fittings and reasonable node connection, and finally form a diversified and personalized building whole.
L-shaped PCF plate reinforcement node is designed for PCF plate reinforcement.
A downward inclined opening shall be reserved on the prefabricated exterior wall slab.
20mm notches are reserved on the four sides of the window.
During later decoration, the grid cloth shall be laid in the groove as a strengthening measure for the construction of decoration to ensure the overall flatness of the floor.
The outside of the wall is sealed with elastic waterproof sealant strip to prevent the leakage of grouting materials from the outside and ensure the continuity of thermal insulation between the upper and lower walls.
3.4.
The wall can partially support the laminated plate and prevent slurry leakage at the same time.
An inverted trapezoidal hoop cap is designed on the top of the wall to ensure the continuity of the vertical reinforcement of the wall.
3.
overall implementation idea to achieve the overall control of construction period, quality, safety and cost through standardized design, industrialized production, assembly construction, integrated decoration and information management.
The upper reinforcement of the prefabricated balcony extends into the floor cast-in-situ slab and is bound and connected with the gluten.
3.8.
the content related to component production is introduced by the component factory.
The size of the anti-corrosion wood is 100x60x50mm.
3.3 connection design of laminated plates a groove of 120mm wide and 5mm thick shall be reserved at the joint between the laminated plate and the laminated plate.
The wall stirrups in the post cast section are separated stirrups, which is convenient for the binding of stirrups in the post cast section area.
The vertical joint detail of the prefabricated exterior wall sleeve connection area adopts semi grouting sleeve.
The joints of the precast exterior wall joints shall be treated as the cast-in-situ concrete, the extruded polystyrene board insulation layer, the concrete outer leaf plate, the polyethylene foam plastic bar, the building weatherproof sealant from inside to outside, and the elastic waterproof sealing material will be used to seal the insulation layer.
The PCF plate and the concrete post pouring section are bonded and connected through thermal insulation tie pieces.
The prefabricated balcony is overlapped with the prefabricated outer wall inner leaf plate by 10mm.
Node design standardization the design of nodes between prefabricated components and prefabricated components and between prefabricated components and cast-in-situ structures shall refer to the national code atlas and consider the operability of on-site construction to ensure the construction quality and avoid the difficulties of on-site construction caused by complex connection nodes.
The hoisting of prefabricated components shall be determined in advance, and the components shall be arranged at the outermost end according to the components hoisted first..
The window frame is fixed on the anticorrosive wood, and the gap between the window frame and the prefabricated components is filled with foaming agent and sealed with silicone weather resistant sealant.
Design of prefabricated exterior wall joint.
Prefabricated stair node design 3.6.
3、 Prefabricated components produced in factory are produced uniformly in the factory.
Anti corrosion wood bricks are set on the left, right and upper sides of prefabricated exterior wall door opening for door fixation.
2.