significance and key points of construction drawing review
? In the construction drawing review, the routine review item is the basic review item to ensure the quality of the construction drawing, while the key review item is the project that is prone to problems or will cause serious consequences once problems occur in combination with previous project experience. Doing a good job in construction drawing review can also reduce or avoid unnecessary design changes and on-site visas, and at the same time guarantee quality, investment and construction period.
1. General review points of drawings
General:
1. Check whether the structural elevation, axis and dimensions are consistent with the architectural drawings;
2. Check the rationality of earthwork balance on site;
3. Check the corresponding technical requirements when there is mass concrete;
4. Check the rationality of the setting position of the post-cast strip, and avoid dividing blocks in the place where the post-cast strip is not stitched in combination with the construction subcontracting, and make construction arrangements in combination with the drawings to avoid sectioning in the place where the post-cast strip is not stitched;
5. Check the rationality of joint practice of post-cast strip, especially the basement.
key points:
1. check the rationality of structural joints, including the impact on building functions and construction organization.
2. Key points of design parameter review
General:
1. Check whether the live load values of different functional areas are reasonable;
2. Check whether the parameters of earthquake and wind load are correct;
3. Check whether the load values of concrete, pavement and masonry are reasonable;
4. Check whether the design grade of foundation, the safety grade of concrete structure, the importance of building seismic fortification, the seismic fortification intensity, the seismic grade of concrete structures in various parts and the environmental category of concrete structures are correct;
5. Check whether the steel bar grade, concrete grade and protective layer thickness of each part are reasonable, and select economic materials such as cold-rolled ribbed steel bars;
6. Check the rationality of the embedded layer of the structure;
emphasis:
1. check the load of special functions, such as large-scale businesses, large-scale catering kitchens and large-scale computer rooms.
III. Key points of foundation drawing review
General:
1. Check the rationality of elevation between pile top, pile cap and floor;
2. Check whether the equipment room in the civil air defense basement has steel bar heads drawn from the foundation for grounding the equipment in wartime.
Key points:
1. Check the safety, rationality and economy of the basic form in combination with the survey report and the field situation;
2. Check the consistency between the bearing stratum of natural foundation and the survey report;
3. Check the positioning of piles and columns and the consistency of architectural drawings;
4. Check the dislocation relationship of natural foundation, which generally meets 1: 2;
5. Check whether the bearing platform and natural foundation conflict with the sump, equipment trench and drainage ditch in combination with the drawings of the building and equipment.
IV. Key points of basement drawing review
General:
1. Check whether the basement water supply, fire fighting and spraying pass through the beam, and consider its safety if it is necessary to pass through the beam;
2, check the clear height of the basement driveway, generally not less than 2.2 meters;
3. Check whether the nodes in the civil air defense drawings conflict with the structural and architectural drawings;
4, check whether the reserved hole in the basement side wall is consistent with the direction of equipment and pipelines;
5. Check the impermeability grade of the basement, consider the influence of water buoyancy on the structural design of the basement, and comprehensively evaluate the rationality and economy of the floor design.
Key points:
1. Check whether the basement uses the structure to find the slope or the building to find the slope. If the structure is used to find the slope, it should meet the corresponding slope and groove requirements;
2, combined with equipment drawings, check whether the clear height of the basement meets the requirements of building codes.
5. Key points for checking the drawings of the main beam structure
General:
1. Check whether the elevation of the surrounding beam bottom is consistent and whether it corresponds to the opening of the building doors and windows;
2. Check the thickness of the corresponding wall under the secondary beam, and the protruding beam angle should be in the secondary room, such as the bathroom and kitchen;
3. To check the deformation and cracks of the long-span cantilever beam, we can consider using reverse arch to deal with the large deformation.
4. Check whether the positioning and load of the beam used for hoisting equipment in the machine room and roof meet the requirements;
5. Check the beam height of the bathroom and the equipment and pipeline settings;
6. When the beam height of the surrounding beam is relatively high, check whether the air conditioning hole penetrates the beam, and if it is necessary to penetrate the beam, embed the sleeve in a reasonable position;
7. Check whether the beam and slab in the park meet the load of covering soil and fire fighting vehicles;
8. Check whether the beam and slab in the construction area meet the requirements of construction load, such as material stacking and construction vehicles.
Key points:
1. Check that the arrangement of beams does not affect the building plane of the next floor, such as the living room, dining room and master bedroom, there should be no beams;
2. The layout of the beam must meet the requirement that the clearance at the bottom of the beam is not less than the building;
3. Check that the elevation of beam bottom at the elevation difference should be commented or lower than the elevation of low-elevation slab bottom;
4. Check whether the arrangement of beams affects the space requirements of the owner's room after it is opened.
VI. Key points for checking the structural drawings of the main slab
General:
1. Check that the elevation of the slab should be consistent with the architectural drawings;
2, check the bathroom, balcony, kitchen, etc. drop board is consistent with the architectural drawings;
3. Check whether the first floor adopts structural floor or building floor and the load is transferred to the foundation;
Key points:
1. Check the thickness of long-span slab, and consider the influence of natural vibration frequency on comfort besides the bearing capacity of the structure;
2. Check the practices of reinforcing bars at the corners of long-span structural reinforcing plates, and check the structural practices at the convex corners of the plates;
3. Check that the elevation difference line at the lower plate does not affect the building space of the next floor;
4. Check the buried pipes in the plate, which is generally not more than two layers. If it is really more than two layers, it is necessary to increase the thickness of the plate and add additional steel bars. If there are large embedded pipes, it is necessary to reserve pipe slots.
VII. Key points of wall-column structure drawing review
General:
1. Check whether the hole passing through the shear wall affects the mechanical performance;
2. Check whether the layout of shear wall affects the room access when the owner needs it;
3. 211mm high concrete anti-dam should be designed around the toilet, and 651mm high concrete anti-dam should be designed at the hot and cold water pipes;
4. The wall in contact with the soil should be a concrete wall or a plain concrete sill at the lower part, which is 211mm higher than the soil level;
5. Check the weakening of the partition wall by the hole of the fire box. When the hole is large, the constructional column can be used;
6. When the thickness of shear wall or concrete column is greater than that of partition wall, the protruding part should be set in the secondary room;
Key points:
1. Check the penetration of the basement exterior wall and reserve waterproof casing.
8. Key points for drawing review of other structural parts
General:
1. Plain concrete anti-sill should be designed at the lower part of floor-to-ceiling doors and windows, not less than 51mm;;
2. When there is a glass curtain wall or a large awning, embedded parts should be set in the main structure;
3. Check the beams around the reserved additional space, and the elevation design should be consistent. The embedded parts of the additional space can be set on the upper part of the beam, and the load of the additional space should be considered;
4. Check the reserved holes in the kitchen flue;
5. Check whether the reserved holes of equipment pipelines passing through shear walls, columns and beams are marked, and check them against the drawings of equipment pipelines.
6, check whether the balcony anti-ridge requirements are consistent with the architectural drawings;
7. Check whether the wall of the cantilever balcony is provided with constructional columns at the root and end;
8. The roof and larger terrace should be structurally sloped;
9. The air conditioning board and window sill board shall be cast-in-situ concrete with a thickness of not less than 81mm, and their positions, dimensions and elevations shall be consistent with the architectural drawings and fa? ades, and the clearance shall be ensured, leaving holes to meet the building requirements;
11. Check whether the setting, size and elevation of building frames are consistent, and consider the influence of frame load on connected structures;
11, large equipment installation should consider the reserved transportation and installation hole;
12, explosion-proof holes and explosion-proof glass should be considered in the boiler room;
13. The flue and parapet outside the roof should be of concrete structure.
14. The external wall of the roof is preferably of concrete structure. If it is designed as a masonry wall, it should be of concrete structure at the bottom with a height of not less than 51mm;;
15. Check whether the position, size and elevation of the awning are consistent with the building. If it is designed as a steel awning, it is necessary to reserve embedded parts;
16. When both sides of the bay window are walls, the side walls should be designed as cast-in-place concrete and cast integrally with the structure;
Key points:
1. Check the load of additional space and pre-installed elevator;
2. Check whether the clear height of stairwell meets the specification requirements. The clear height of stair section is not less than 2211mm, and the clear height of platform section is not less than 2111mm.
Here, we will load the Checklist of Vanke's Construction Drawings and some places worth learning from Vanke's drawings for your learning.
For building construction practices, Vanke will require that each construction practice must be checked in accordance with the unified technical standards of the project and the special requirements of the project (the annex to the general contracting tender).
In addition, there are clear requirements for building materials, masonry mortar, thermal insulation, internal wallboard, constructional column ring beam, etc.
The drawing review of other plates is also very detailed, and many values will directly give the reference range.
first, the key points of basement drawing review
Vanke has stipulated the size and specifications of underground garage, and the following drawing parameters shall prevail when drawing review:
And the key points of drawing review given by Vanke to the basement are also explained in detail:
second, the first floor plan review list
third, the standard floor plan review list
The picture comes from the network.