Some standard content:
National Standard of the People's Republic of China
Code for Design of Building Floors
cxde for cesign20, etc.
Compacted fill soil thickness and compaction times for each roof Table 5.0.4
Compacting machines
Sheep-foot roller
Frog-type tamping machine
Man tamping
Thickness of each layer (mm2)
200~300
200-350
200-~250
Not more than 200
Number of times per layer
Note: ① This table is applicable to the selection of silt, clay, etc. as soil materials. For lime soil and sandy soil filling materials, the relevant provisions of the current national standard "Code for Design of Building Foundations" shall be followed.
②This table is applicable to fill with a thickness of less than 2m. 5.0.5 After compaction, soft soils such as treated silt, silt material, backfill or miscellaneous fill should be reinforced with pebbles, gravel, crushed stone, broken bricks, slag or sand according to specific conditions for foundation layer reinforcement. The thickness should not be less than 60mim: The backfill of foundation trenches and pits should be treated as new fill.
5.0.6 For outdoor storage yards, scattered waterways, ramps and other floors that are directly affected by human traffic, when concrete cushion layers are used, materials such as sand, slag, crushed stone, slag and ash with good water stability should be laid under the cushion layer, and the thickness should not be less than the requirements in Table 4.0.2 of this Code.
5.0.7 For the floors of factories, warehouses and important buildings with large-area ground loads, the possible uneven deformation of the foundation and its adverse effects on the buildings should be considered, and relevant technical measures should be taken in accordance with the current national standard "Code for Design of Building Foundations":
6 Ground structure
The ground elevation of the bottom floor of a building should be 6.0.1
15Umm higher than the outdoor ground. When there are special requirements for production and use or other reasons such as expected large settlement of the building, the indoor and outdoor height difference can be appropriately increased. 6.0.2 When production and use requirements do not allow concrete to crack, a steel mesh with a diameter of 4mm and a spacing of 150~200mml should be arranged 20mm below the concrete top surface.
6.0.3 The setting of ground deformation joints shall meet the following requirements: 6.0.3.1 The setting of settlement joints on the ground floor and settlement joints, expansion joints and seismic joints on the floor of the building shall be consistent with the corresponding joint positions of the structure and shall penetrate all structural layers of the ground. 6.0.3.2 The deformation joint shall be on the watershed line of the drainage slope and shall not pass through the parts where liquid flows or accumulates.
6.0.4 The construction of the deformation joint shall take into account that when it is displaced or deformed, it will not be blocked, damaged, or damage the ground; the material selection shall take measures such as fire prevention, waterproofing, heat preservation, pest prevention, and oil seepage prevention according to different requirements.
6.0.5 The concrete cushion layer of the bottom floor shall be provided with longitudinal and transverse contraction joints and shall meet the following requirements:
6.0.5.1 The longitudinal contraction joints shall be flat-head joints or tongue-and-groove joints (Figure 6.0.5 (α), (b)), and the spacing may be 3~6m. 6.0.5.2 When the longitudinal contraction joints are tongue-and-groove joints, the structural thickness of the cushion layer shall not be less than 150mm, and the concrete compressive strength when the tongue-and-groove is removed from the formwork shall not be less than 3MPa.
6.0.5.3 The transverse contraction joints shall be false joints (Figure 6.0.5 (c)), and the spacing may be 6~12m; for the ground constructed in high temperature seasons, the false joint spacing shall be 6ml. The width of the false joints shall be 5~20mm and the height shall be 1/3 of the thickness of the subsoil layer: the joints shall be filled with cement mortar.
6.0.6 No isolation material shall be placed between flat-head joints and tongue-and-groove joints, which must be close to each other
6.0.7 Concrete cushions on outdoor floors should be provided with intermediate joints, with a spacing of 20~30mm and a width of 20~30mm. The joints should be filled with asphalt materials, and the upper edges of the concrete on both sides of the joints should be partially reinforced. 6.0.8 For large-area densely piled floors, the longitudinal and transverse contraction joints of the concrete cushion should be flat-head joints, with a spacing of 6rm. 6.0.9 At the junction of different cushion thicknesses, when the thickness ratio of adjacent cushion layers is greater than 1 and less than or equal to 1.4, continuous transition measures can be taken 2-2-8
(a) Head joint
(b) Tongue joint
(c) False joint
Fill with cement mortar
Figure 6.0.5 Flat head joint, tongue joint and false joint.
(a) Continuous variable section
Fill with elastic material
(b) Intermittent variable section
Figure 6.0.9 Two forms of variable section
(Figure 6.0.9(α)); when the thickness ratio is greater than 1.4, intermittent settlement joints can be set (Figure 6.0.9(b)).
6.0.10 For ground with anti-freezing expansion layer, when concrete cushion is used, the longitudinal and transverse contraction joints shall adopt flat-head joints, and the spacing shall not be greater than 3m.
6.0.11 When ribs are added around the concrete cushion, it is advisable to use ribs. The longitudinal and transverse contraction joints shall adopt flat-head joints (Figure 6.0.11), and the spacing shall be 6m. The longitudinal and transverse spacing shall be equal. When constructing in high temperature season, the spacing shall be 6m
Figure 6.0.11 Auxiliary structure around cushion
6.0.12 The partition joints of the surface layer laid on the concrete cushion shall meet the following requirements:
Asphalt surface layer and block surface layer may not have joints. 6.0.12.1
6.0.12.2 The partition joints of the fine stone concrete surface layer shall be aligned with the contraction joints of the cushion layer.
6.0.12.3 The expansion joints of terrazzo, cement mortar, polymer mortar and other surface layers should not only be aligned with the shrinkage joints of the cushion layer, but also be reduced in spacing according to specific design requirements. Expansion joints are set on both sides of the main beam and around the columns. 6.0.12.4 The expansion joints of the surface layer with an isolation layer may not be aligned with the shrinkage joints of the cushion layer.
6.0.12.5 The construction method of expansion joints of the anti-oil seepage surface layer should meet the following requirements:
(1) The width of the expansion joint can be 1520mm, and its depth can be equal to the thickness of the layer.
(2) The caulking material of the expansion joint should be oil-proof mortar for the lower layer and expansion cement mortar for the upper layer. 6.0.13 When there is water or other liquid that needs to be discharged, the ground should be provided with a drainage slope facing the drainage ditch or floor drain. When the drainage slope is long, a drainage ditch should be provided.
Drainage ditch or floor drain should be set in a position that does not hinder use and can quickly drain water or other liquids.
6.0.14 When the drainage area is large, when the drainage volume is small, the drainage can be controlled or flushed irregularly, the drainage slope can be set only within a certain range around the drainage floor drain.
6.0.15 The slope of the ground floor should be built by modifying the foundation elevation. The slope of the floor should be changed by changing the thickness of the filling layer and leveling layer or starting the slope from the structure. wwW.bzxz.Net
6.0.16 The slope of the ground drainage slope should meet the following requirements: 6.0.16.1 The integral surface layer or the block surface layer with a relatively smooth surface can be 0.5%~1.5%.
6.0.16.2 The block surface layer with a relatively rough surface can be 1%~2%.
6.0.17 The longitudinal slope of the drainage ditch should not be less than 0.5%. 6.0.18 The number of layers of the isolation layer around the floor drain, drainage trench and the connection between the floor and the wall should be appropriately increased or the isolation layer materials with better performance should be used locally. The isolation layer at the connection between the floor and the wall should be flanged, and its height should not be less than 150mm.
6.0.19 At the connection between the floor and the wall, column, etc. where water or other liquids are present, skirting boards or wall skirts should be installed respectively. The height of the skirting board should not be less than 150mm.
6.0.20 Between the area where water or other liquids flow and the adjacent area, a water barrier should be installed or the height difference of the adjacent floors should be adjusted. 6.\.21 Anti-slip measures should be considered on steps, ramps or floors where water, grease, oil and other slippery substances are often present. 6..22 Around the holes in the floor of the floor where water or other liquids flow and the edge of the platform facing the air, flanges or ground shielding should be installed, and the height should not be less than 100mm.
6.0.23 Strengthening measures should be taken at the edges of trenches that are subject to strong impact and abrasion. Strengthening measures can be taken at the edges of steps and treads according to the usage conditions.
6.0.24 Sprinklers, open drainage ditches or open drainage ditches with sprinkling belts should be set around the building. The setting of sprinkling should meet the following requirements: 6.0.24.1 The width of the sprinkling should be determined according to the soil properties, climatic conditions, building height and roof drainage type, and should be 600-1000mm; when unorganized drainage is used, the width of the sprinkling can be released 200-300mm according to the eaves line
6.0.24.2 The slope of the water dispersion can be 3% to 5%. When the water dispersion is made of concrete, expansion joints should be set at intervals of 20 to 30 mm. A gap should be set between the water dispersion and the exterior wall, and the gap width can be 20 to 30 mm. The gap should be filled with asphalt materials.
Appendix A Thickness of surface layer, bonding layer, filling layer, leveling layer and number of isolation layers
A.0.1 The thickness of the surface layer shall comply with the provisions of Table A.0.1. Thickness of surface layer
Name of surface layer
Concrete (cushion and surface layer)
Fine stone concrete
Polymer cement mortar
Cement mortar
Iron filings cement
Cement stone chips
Oil-proof concrete
Oil-proof coating
Heat-resistant concrete
Asphalt concrete
Asphalt mortar
Magnesium (single layer)
(double layer)
Slag, crushed stone (cushion and cushion layer)
Sangang soil (cushion and cushion layer)||tt| |Precast concrete slab (side length
500mmm)
Ordinary clay brick (flat paving)
(side paving)
Material strength grade
≥C1s
≥C20
≥M20
≥M15
≥C30
Thickness (rmm)
Determined by cushion layer
3035 (including bonding layer)
20--30
20~·25
100～150
100 --150
2—2--9
Surface layer name
Coal-grade stone brick, refractory brick (half-paving)
(side paving)
Cement tile
Water-cast instantaneous
Prefabricated water-ground board
Ceramic mosaic tile (mosaic)
Floor tile (board)
Hua Min Tea Shop
Marble, granite
Cast iron plate
Board (single layer)
(double layer)
Sheer wood floor
Grateful ventilation floor
Polyethylene board
Polyester floor (carpet)
Static conductivity plastic board
Polyurethane white flow head
Resin mortar
Material strength grade
Height (num)
25~:30 (including knot layer)
80~120
100~150
Height 300--400
Note: D The surface thickness of double-layer wooden floor does not include the thickness of the subfloor. The surface layer is made of hardwood. The net thickness of the board should be 12~18nm
() Asphalt materials in this specification refer to petroleum asphalt. The anti-penetration performance of oil-proof concrete should be tested in accordance with the current national standard "Zuntong Concrete 1 Long-term Performance and Durability Test Method", using No. 10 engine oil as the medium, and the maximum oil-proof pressure without oil leakage of the test piece is 1.5MPae
D The bond tensile strength of the oil-proof coating is 20.3MPs) The thickness of the iron plate refers to the thickness of the surface layer.
A.0.2 The thickness of the bonding layer should comply with the provisions of Table A.0.2. Thickness of combined layer
Surface layer name
Prefabricated concrete slab
Ceramic mosaic tile
Ordinary cement brick, coal stone brick, refractory brick cement tile
Flower tree string stone
Marble, granite, prefabricated terrazzo floor ceramic tile (board)
Egg material, rubber, polyvinyl chloride plastic and other board local board
Inch electrostatic plastic board
Materials of combined layer
Sand, slag
1:1 cement mortar
Thickness (mm)| |tt||or 1:4 dry hard cement mortar
sand, slag
[:2 cement mortar
or 1:4T hard cement mortar
sand, slag
1:2 cement mortar
1:2 cement mortar
1:2 cement mortar
1:2 cement mortar
sand, slag
adhesive
adhesive, wooden nails
matching conductive static adhesive
The thickness of the filling layer shall comply with the provisions of Table A.0.3. The thickness of the leveling layer shall comply with the provisions of Table A, 0.4. 20 -- 30
20 ~30
[5 ~20
10 ~15
A.0.5 The number of isolation layers shall comply with the provisions of Table A.0.5, 2-2-10
Filling layer materials
Cement slag
Cement coal slag
Light aggregate concrete
Aerated concrete! Block
Cement expanded perlite block
Asphalt expanded perlite block
Leveling layer materials
Cement mortar
Concrete
Filling layer thickness
Strength grade or mix ratio
Leveling layer thickness
Strength grade or mix ratio
CI0 ~ C15
Number of isolation layers
Issulation layer materials
Petroleum asphalt felt
Asphalt glass cloth felt
Recycled rubber felt
Soft polyvinyl chloride coil
Waterproof cold glue
Waterproof coating (polyurethane coating)
Hot asphalt
Oil-proof glue glass fiber cloth
Note: D Petroleum asphalt felt should not be less than 350g=(②Total thickness of waterproof coating is generally 1.5~2mm Table A.0.3
Degree (mm)
30 ~-80
30 --80
Thickness (mm)
Number of layers (or passes)
One cloth glue
—cloth two glue
③When waterproof film (agricultural film) is used as the isolation layer, its thickness is 0.4~0.6mm①When asphalt mortar is used as the isolation layer, its rate is 10~20rme. For oil-proof isolation layer, waterproof coating materials with oil-proof performance can be used.
Appendix B Concrete cushion thickness selection table
See Table B.0.1 for the selection of concrete cushion thickness. B.0.1
Concrete cushion thickness selection table
Concrete Soil cushion thickness (mm)
Load type
(kv/nr)
Zeng Tongjinguo
Ye Boqie
Front machine
Horizontal lathe CW6163, turret
hexagonal lathe CQ31125, skive tooth
lathe CR8925, semi-automatic lathe
C7625, wound lathe C7125
Radial drilling machine 235, vertical drilling machine
ZSYS, horizontal internal broaching machine [G1H
Concrete mountain
Compacted fill foundation change||t Modulus of shape E. (N/tm2) Ordinary metal cutting machine technology Load type External grinding machine M131W Internal grinding machine M250A, surface grinding machine M713211, centerless grinding machine MI08013, crankshaft grinding machine MQ8260 Rolling machine Y38, tooth cutting machine Y236, inserting machine Y75150, shaving machine Y42-45, vertical milling machine X5032, horizontal milling machine ||XA6140A, armed speed
TAX6IT
Niutou Chuang machine 60633, inserting machine
27 battery car, It Italian loading and unloading
to 2.51 villa car
+ loading car, 21 double armed unloading
3 technical equipment
loading car 51 loading and unloading
car, 12# three-axle loading car
Concrete + English layer thickness (mm)
Concrete
Deformation modulus E of compacted fill foundation, (N/mm*)
(20 1 140)
C10140 -160 130-~ 150 120 ~ 140C15 130-~ 150 120~ 140 110~ L301±20 120- 130 10 -13 100- 120Note: (D) "When there is a cast-in-place fine stone concrete surface layer on the cushion layer, the thickness listed in the table should be reduced by the thickness of the commercial layer, but it should not be less than 60mme
() When the concrete cushion layer is ribbed or there is a foundation reinforcement layer such as lime soil under the cushion layer, the thickness listed in the table is multiplied by the reduction factor 0.75; When both the plate edge rib and the foundation reinforcement layer are used, no secondary reduction is required. The thickness after reduction should not be less than 100mm3 for the section where the first metal cutting machine is directly installed: The support space H% 8m. For objects with a support area ≥ 30×30m), the half-average weight calculated according to the projected product area is ≤50kN/z. The cushion thickness can also be selected according to "large-area aggregate stacking".
When using a crane to stack steel plates, rough parts and other heavy objects, or when a crane used for maintenance equipment is used to clear a special maintenance site, or when the assembly work is carried out at a special location, or when the assembled product has a large contact area with the ground, the crane lifting limit in the table should not be used as the basis for selecting the cushion thickness. The calculated value of the deformation model E of the actual fill is as shown in Table (.1.5 of this specification) When selecting
, the thickness listed in the table should be selected in accordance with the local climate, soil quality, filler, usage experience, construction and maintenance conditions. The requirements for use should be appropriate and economically reasonable.
Calculation of the thickness of the concrete cushion layer
Appendix C
General provisions
C.1.1 The calculation of the thickness of the concrete cushion layer should adopt the limit state design method based on probability theory and use the design expression of the partial factor for calculation.
C.1.2 The concrete cushion layer should be designed according to the ultimate state of bearing capacity and meet the requirements of the normal use limit state. Note: According to the characteristics of the concrete + slab structure on the foundation, the concrete cushion layer! The limit state should be the state when the slab surface is about to have annular cracks under the action of short-term loads. According to the severity of the possible consequences of the destruction of the concrete cushion layer (causing economic losses, social impact, etc.), the cushion layer should be designed according to Table C. 1.3 Three safety levels and importance factors are divided: when the design and calculation is based on the ultimate limit state of bearing capacity, the appropriate selection should be made according to the specific situation. Safety level and importance factor of concrete cushion layer Table C.1.3 Ground category
Important building ground
General building ground
Secondary building ground
Safety level
Importance factor.
Note: For special building ground, its safety level can be determined according to the specific situation. Concrete design indicators should be adopted according to Table C.1.4. C.1.4
Concrete design indicators
Concrete strength grade
Tensile strength
f(N/mm2)
Elastic modulus
E.(N/mm2)
1.75×10|2.20×102.55×10|2.80×104|3.00× 10 Deformation modulus E of compacted fill foundation. Deformation modulus (E) of compacted fill foundation should be determined according to Table C.1.5
Fill type
Viscous
Quality control index
N>30"Dense
15
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