December 25, 2024

Precast policy | Shenzhen precast building scoring rules and concrete structure interpretation and case analysis

Note: the identical house type and its mirror house type are the same house type.

When only the upper and lower floors with variable section of structural wall column are the same house type.

Note: due to the different thickness of the upper and lower layers of the structural shear wall, only the upper and lower laminated plates with changes in a single direction are the same precast components.

Note: 1.

The minimum score of vertical members + horizontal members shall not be less than 20 points.

2.

The non load-bearing outer wall panels and outer wall breast boards included in the vertical members shall be concrete or lightweight concrete materials.

Note: 1.

The cast-in-situ structural columns, balcony breast boards, household partition walls, etc.

belonging to the outer enclosure and outside the building shall be included in the vertical main structure, and the precast part shall be included in the numerator, The precast and cast-in-situ parts are included in the total volume of the denominator.

2.

ALC wall panels, precast light strips and other exterior wall panels of secondary structures are not included in the volume of vertical components.

Note: 1.

The full section of double skin wall (including cast-in-situ in the middle) is included in the volume of precast components; 2.

Single skin wall (PCF) only the precast part is included in the volume of precast components; 3.

The full section volume of the external cantilever plate precast together with the precast external wall plate (such as precast bay window side plate and upper and lower cantilever plate) is included in the volume of vertical components.

Unit curtain wall: refers to the basic unit of complete curtain wall structure made by various wall panels and supporting frames in the factory, which has the functions of decoration, thermal insulation and other functions and is directly installed on the main structure.

Precast exterior wall panel components of external decoration, thermal insulation and other integrated production in the factory can be included in the scope of unit curtain wall.

For example: anti tile + sandwich exterior wall panel.

Ductile wallboard: it is a structural seismic stress component, which can effectively enhance the seismic capacity of the main structure and is easy to replace after damage.

For example, steel plate shear wall, steel plate composite shear wall, concrete shear wall with vertical joints, etc.

Note: the minimum score of vertical members + horizontal members shall not be less than 20.

Note: the review opinions on seismic overrun shall be expressed.

For example, if a building adopts precast composite floor slab, which affects the seismic safety of the structure, the cast-in-situ floor system shall be adopted.

Note: 1.

The projection range of the overhanging plate (such as the precast convex window plate) precast together with the precast exterior wall plate is no longer included in the total horizontal projection area and the precast part area (not repeated with the vertical calculation); 2.

When there are cast-in-situ slabs with no less than 1 floor above and below in the same plane position in the same standard layer, the horizontal projected area shall be calculated according to the peripheral line of the projected area of several slabs.

Note: 1.

The minimum score of non masonry and plastering free external wall shall not be less than 5 points; 2.

The scope of non masonry and non plastering of the external wall is the non load-bearing peripheral retaining wall; 3.

If there is masonry in the upper or lower range of door and window openings, the length of door and window openings shall be included in the length according to the masonry.

Note: 1.

The minimum score for non masonry and plastering free internal partition wall shall not be less than 5 points; 2.

If there is masonry in the upper or lower range of door and window openings, the length of door and window openings shall be included in the length according to the masonry; 3.

If the internal filling wall is a non structural main force bearing member, it shall not be included in the volume of vertical documents (including light internal partition strip and precast concrete partition board).

Note: 1.

Dry hanging, painting, paving and other finishes shall be completed for the walls in public areas, dry paving, paving and polishing shall be completed for the ground, and ceiling and painting shall be completed for the sky; 2.

Finish the wall and ground of the kitchen, finish the ceiling and painting on the roof, install the switches, sockets, lamps and doors in place, and reserve the water supply points in place; 3.

The wall and ground of the toilet shall be paved, the ceiling and painting shall be completed, the floor drain, switch, socket, lamp and door shall be installed in place, and the gas and water supply points shall be reserved in place; 4.

Finish such as paving of the external wall and ground, ceiling and painting of the ceiling, floor drain, switch, lamp and socket are installed in place, and water supply points are reserved in place; 5.

The walls of other functional rooms have been painted, paved and other finishes, the ground has been dry paved, paved and polished, the ceiling and painting have been completed, and the doors, switches and sockets have been installed; 6.

There is no excavation, masonry, plastering, etc.

after occupancy.

Note: 1.

Shelf paving, dry paving or thin pasting are three different processes, which can be selected by themselves.

The thickness is 3-5mm, excluding the finish; 2.

The ceiling has basically realized the factory finished ceiling, which is not included in the sub item, and the ceiling material and work saving is not done; 3.

Missing item deduction maximum score.

1.

The video demonstration document is mainly the demonstration of the implementation scheme and construction technology, which shall be prepared by the construction unit together with the construction general contractor, engineering consulting and other units according to the implementation scheme.

2.

The technical identification time node is before the construction drawing, and the detailed design has not yet started.

The drawings mainly provide the layout of precast components, detailed drawings of key connection nodes and schematic diagrams of complex components.

It is not necessary to provide all the detailed design drawings of precast components.

3.

For the toilet with large drop slab, the corresponding score can be obtained as long as the dry paving or thin pasting process is adopted for the floor tile, which has nothing to do with backfilling.

4.

When the construction accuracy of peripheral retaining wall meets the requirements of 4mm / ZM and the plasterless process is adopted, the use of thermal insulation mortar will not affect the judgment of plasterless.

5.

When the building has both concrete structure and steel structure, when the vertical members are mainly steel structure, it is generally calculated according to the steel structure.

The principle is how to score and how to calculate when the requirements of the rules are met..