1 scope
The technology standard is applicable to industrial and civil construction in the medium and small concrete equipment foundation.
2 construction preparation
2.1 material and main equipments:
The appropriate 2.1.1 cement: 325 ~ 425 # slag Portland cement and ordinary Portland cement.
2.1.2 sand: medium and coarse sand, silt content is not more than 5%.
2.1.3 stones, pebbles or gravel, particle size of 0.5 ~ 3.2 cm, silt content is not more than 2%.
2.1.4 water: tap water or clean water does not contain harmful substances.
2.1.5 additive and admixture, the varieties and dosage. Should be according to the needs, determined by experiment
2.1.6 main equipment: should be equipped with mixer, the scale, carts, or skip, shovels (sharp, flat head), vibrator (rod type or plate type), scraping bars, wood trowel, string of barrels or chute, rubber tube, etc.
2.2 operation conditions:
2.2.1 based axis dimension, basal elevations and geology are checked, and should be completed implicit inspection procedures.
2.2.2 installation template has been checked, comply with the design requirements, and completed preview procedures.
2.2.3, walls or template on the slot for flat mark in the concrete. Larger or ladder model basis, should be a horizontal or play online.
2.2.4 buried in the foundation reinforcement, bolts, embedded parts, equipment, pipeline have been installed, and after examination and acceptance of relevant departments, and completed implicit inspection procedures.
2.2.5 concrete mixture ratio by the laboratory, after verification, the amount of adjustment of the first set of concrete material, to conduct technical disclosure and trial batch. At the same time ready to concrete test mode.
3 operation process
Technological process:
Cleaning up inside the bottom of the channel or template to concrete mixing, concrete pouring, the concrete vibratory - concrete leveling -
Concrete curing
3.2 clean: remove mud and debris on the foundation and foundation soil, and shall have the waterproof and drainage measures. Application for dry soil water wettability, surface shall not have water. Clean the garbage in the template, soil and other sundry, water wettability and wooden template, blocking plate seams and holes.
Concrete mixing: 3.3 background carefully according to the concrete mixture ratio of feeding; Each plate feeding order for stone, cement and sand (admixture) - water (additive) -. Strict control of water, stir well, stirring time is generally not less than 90 s.
3.4 concrete casting:
3.4.1 track of concrete pouring concrete feed opening distance surface height shall not be more than 2 m, such as free pour down more than 2 m, should use string barrels or chute.
3.4.2 the pouring of concrete should be layered continuous, general layer thickness for the vibrator 1.25 times the length of the part, the biggest thickness is less than 50 cm.
Rule 3.4.3 inserted with internal vibrator should fast slow, pull plug point should be evenly arranged, point by point, order, shall not be omitted, vibrating compaction. Mobile spacing is not greater than 1.5 times of vibrating rod action radius. Vibrating a layer, 5 cm should be inserted into the lower level, in order to eliminate the joint between the two layers. Mobile spacing plate vibrator, should be able to guarantee the vibrator cover has the edge of the vibratory flat.
3.4.4 concrete cannot for continuous casting, if more than 2 h, should be in accordance with the requirements of design and construction of the norms lien construction joints.
3.4.5 pouring concrete, often should observe template, stent, bolts, pipes and have reserved holes and embedded parts without moving, when found that deformation or displacement, should immediately stop pouring, and timely repair and reinforcement template, after completely handle, continue to pouring concrete.
3.4.6 concrete vibratory compaction, surface application of wooden poles, leveling wood float laid flat.
3.4.7 concrete curing: after concrete pouring rub flat, should be around 12 h to coverage and sprinkler, the number of water should be able to maintain enough concrete wetting state. Curing period is generally not less than seven days and nights.
3.4.8 rain, winter construction, open casting concrete should prepare the seasonal construction plan, take effective measures to ensure the quality of the concrete, or may not be any construction.
4 quality standards
4.1 ensure projects:
4.4.1 concrete used in cement, aggregate, water and additive must comply with the provisions of the construction specification and relevant standards.
4.1.2 the mixing proportion of concrete, metering, mixing of raw materials and maintenance and construction joint treatment, must comply with the norms of construction.
4.1.3 to assess the strength of the concrete block, must according to the concrete strength inspection criteria (GBJ107-87), the provisions of the sampling, production, maintenance and test, its strength must conform to the norms of construction.
4.2 the basic items:
2 should concrete vibrating compaction. A is not more than 400 cm2, cellular area, accumulative total is not more than 800 cm2, no holes.
4.2.2 without gap slag layer.
Holdings based surface slope, slope should be correct, no phenomenon of the slope.
4.3 allowable deviation projects, see table 2-13.
5 finished product protection
5.1 to ensure that the steel bar, embedded parts, accurate location of the embedded bolt, holes and line pipe, shall not touch.
5.2 heavy impact must not be used as a template, no help in hanging on the template of DaJiao planks, to ensure that the template solid and tight.
5.3 profile template should be in concrete strength can guarantee its edges and not because of open die, and when the damaged, can tear open mold.
5.4 in the pouring of concrete strength reaches more than 1.2 MPa, can walk in and on the upper and construction.
5.5 in the concrete transportation, should protect the reserved hole equipment pipelines, the doorway, avoid collision damage.
5.6 large equipment foundation more than adjacent buildings foundation depth, should have proper protection measures or solutions.
5.7 basis should be reserved holes according to design requirements, installing bolts and embedded parts shall be missed. In order to avoid the carved chisel foundation concrete.
5.8 night construction, reasonable arrangement of construction order, to be equipped with adequate lighting, prevent concrete mixture ratio to weigh
Concrete equipment foundation allowable deviation table 2-13
Will project allowable deviation (mm) test method
1 to coordinate displacement (vertical and horizontal axis) + 20 with theodolite or stay 'quantity check
In the plane of the 2 different elevation + 0-20 with level or stay 'quantity check
Plane dimension + 20 feet for inspection
3 convex platform + 0 to 20 feet of plane dimension inspection
Recess size 0 + 20 feet quantity check
Per meter with level 5 or level
The whole article 10 and wedge feeler check
5 per meter with theodolite or messenger wire
All 10 feet and check
The high (top) + 20-0 at the top of the roots or use level
Pitch in the plus or minus 2 or stay 'quantity check
Displacement of the center line of the plus or minus 10 feet of vertical and horizontal directions
7, embedded anchor bolt hole depth dimensions + 20-0 feet quantity check
10 hole aluminum vertical alignment or feet quantity check
The high + 20-0
Displacement of the center line of the plus or minus 5
Kong Mao plate flatness 2 with screws
Slotted anchor plate flatness 5
No, prevent collision of various pipelines, templates, embedded parts and site facilities, etc.
5.9 winter construction, concrete surface should be covered insulation materials, prevent concrete seas.
6 should pay attention to quality problems
6.1 concrete imperfect: due to the too thickness of blanking, vibrating false or leakage of vibration, hung for template root mortar pouring, honeycomb, pits, or holes; To early to dismantle, concrete grout stick on the template, can cause pitting surface.
6.2 concrete surface uneven, elevation is not allowed, size: due to the horizontal line or small peg, operation is not seriously leveling, concrete spread too thick, causes such as less spread too thin.
6.3 basic axis displacement, bolt holes and diaphragm displacement: mainly improper measures of embedded parts fixed, or concrete, vibration rods inserted are not allowed to be caused by the collision.
6.4 exposure: reinforced or displacement of block, reinforced against template or vibrating untrue, leakage, all can cause exposure.
6.5 gap slag: bad concrete construction joints have sundry, mainly is caused not carefully clean up construction joints.
6.6 irregular cracks: base is too large, internal stress due to hydration heat temperature, the lower concrete combining with bad, maintenance is not enough, or causes such as premature ripping.
7 quality records
This technology standard should have the following quality records
7.1 cement factory certificate and the reinspection do not coincide.
7.2 template elevation, the axis, sizes and service records.
7.3 concrete should try with application form and mix notice issued by the laboratory.
7.4 concrete block 28 d standard compressive strength test report. Commercial concrete shall have the factory certificate.
7.5 embedded parts, bolts, anchor plate, etc. Product certification.
The technology standard is applicable to industrial and civil construction in the medium and small concrete equipment foundation.
2 construction preparation
2.1 material and main equipments:
The appropriate 2.1.1 cement: 325 ~ 425 # slag Portland cement and ordinary Portland cement.
2.1.2 sand: medium and coarse sand, silt content is not more than 5%.
2.1.3 stones, pebbles or gravel, particle size of 0.5 ~ 3.2 cm, silt content is not more than 2%.
2.1.4 water: tap water or clean water does not contain harmful substances.
2.1.5 additive and admixture, the varieties and dosage. Should be according to the needs, determined by experiment
2.1.6 main equipment: should be equipped with mixer, the scale, carts, or skip, shovels (sharp, flat head), vibrator (rod type or plate type), scraping bars, wood trowel, string of barrels or chute, rubber tube, etc.
2.2 operation conditions:
2.2.1 based axis dimension, basal elevations and geology are checked, and should be completed implicit inspection procedures.
2.2.2 installation template has been checked, comply with the design requirements, and completed preview procedures.
2.2.3, walls or template on the slot for flat mark in the concrete. Larger or ladder model basis, should be a horizontal or play online.
2.2.4 buried in the foundation reinforcement, bolts, embedded parts, equipment, pipeline have been installed, and after examination and acceptance of relevant departments, and completed implicit inspection procedures.
2.2.5 concrete mixture ratio by the laboratory, after verification, the amount of adjustment of the first set of concrete material, to conduct technical disclosure and trial batch. At the same time ready to concrete test mode.
3 operation process
Technological process:
Cleaning up inside the bottom of the channel or template to concrete mixing, concrete pouring, the concrete vibratory - concrete leveling -
Concrete curing
3.2 clean: remove mud and debris on the foundation and foundation soil, and shall have the waterproof and drainage measures. Application for dry soil water wettability, surface shall not have water. Clean the garbage in the template, soil and other sundry, water wettability and wooden template, blocking plate seams and holes.
Concrete mixing: 3.3 background carefully according to the concrete mixture ratio of feeding; Each plate feeding order for stone, cement and sand (admixture) - water (additive) -. Strict control of water, stir well, stirring time is generally not less than 90 s.
3.4 concrete casting:
3.4.1 track of concrete pouring concrete feed opening distance surface height shall not be more than 2 m, such as free pour down more than 2 m, should use string barrels or chute.
3.4.2 the pouring of concrete should be layered continuous, general layer thickness for the vibrator 1.25 times the length of the part, the biggest thickness is less than 50 cm.
Rule 3.4.3 inserted with internal vibrator should fast slow, pull plug point should be evenly arranged, point by point, order, shall not be omitted, vibrating compaction. Mobile spacing is not greater than 1.5 times of vibrating rod action radius. Vibrating a layer, 5 cm should be inserted into the lower level, in order to eliminate the joint between the two layers. Mobile spacing plate vibrator, should be able to guarantee the vibrator cover has the edge of the vibratory flat.
3.4.4 concrete cannot for continuous casting, if more than 2 h, should be in accordance with the requirements of design and construction of the norms lien construction joints.
3.4.5 pouring concrete, often should observe template, stent, bolts, pipes and have reserved holes and embedded parts without moving, when found that deformation or displacement, should immediately stop pouring, and timely repair and reinforcement template, after completely handle, continue to pouring concrete.
3.4.6 concrete vibratory compaction, surface application of wooden poles, leveling wood float laid flat.
3.4.7 concrete curing: after concrete pouring rub flat, should be around 12 h to coverage and sprinkler, the number of water should be able to maintain enough concrete wetting state. Curing period is generally not less than seven days and nights.
3.4.8 rain, winter construction, open casting concrete should prepare the seasonal construction plan, take effective measures to ensure the quality of the concrete, or may not be any construction.
4 quality standards
4.1 ensure projects:
4.4.1 concrete used in cement, aggregate, water and additive must comply with the provisions of the construction specification and relevant standards.
4.1.2 the mixing proportion of concrete, metering, mixing of raw materials and maintenance and construction joint treatment, must comply with the norms of construction.
4.1.3 to assess the strength of the concrete block, must according to the concrete strength inspection criteria (GBJ107-87), the provisions of the sampling, production, maintenance and test, its strength must conform to the norms of construction.
4.2 the basic items:
2 should concrete vibrating compaction. A is not more than 400 cm2, cellular area, accumulative total is not more than 800 cm2, no holes.
4.2.2 without gap slag layer.
Holdings based surface slope, slope should be correct, no phenomenon of the slope.
4.3 allowable deviation projects, see table 2-13.
5 finished product protection
5.1 to ensure that the steel bar, embedded parts, accurate location of the embedded bolt, holes and line pipe, shall not touch.
5.2 heavy impact must not be used as a template, no help in hanging on the template of DaJiao planks, to ensure that the template solid and tight.
5.3 profile template should be in concrete strength can guarantee its edges and not because of open die, and when the damaged, can tear open mold.
5.4 in the pouring of concrete strength reaches more than 1.2 MPa, can walk in and on the upper and construction.
5.5 in the concrete transportation, should protect the reserved hole equipment pipelines, the doorway, avoid collision damage.
5.6 large equipment foundation more than adjacent buildings foundation depth, should have proper protection measures or solutions.
5.7 basis should be reserved holes according to design requirements, installing bolts and embedded parts shall be missed. In order to avoid the carved chisel foundation concrete.
5.8 night construction, reasonable arrangement of construction order, to be equipped with adequate lighting, prevent concrete mixture ratio to weigh
Concrete equipment foundation allowable deviation table 2-13
Will project allowable deviation (mm) test method
1 to coordinate displacement (vertical and horizontal axis) + 20 with theodolite or stay 'quantity check
In the plane of the 2 different elevation + 0-20 with level or stay 'quantity check
Plane dimension + 20 feet for inspection
3 convex platform + 0 to 20 feet of plane dimension inspection
Recess size 0 + 20 feet quantity check
Per meter with level 5 or level
The whole article 10 and wedge feeler check
5 per meter with theodolite or messenger wire
All 10 feet and check
The high (top) + 20-0 at the top of the roots or use level
Pitch in the plus or minus 2 or stay 'quantity check
Displacement of the center line of the plus or minus 10 feet of vertical and horizontal directions
7, embedded anchor bolt hole depth dimensions + 20-0 feet quantity check
10 hole aluminum vertical alignment or feet quantity check
The high + 20-0
Displacement of the center line of the plus or minus 5
Kong Mao plate flatness 2 with screws
Slotted anchor plate flatness 5
No, prevent collision of various pipelines, templates, embedded parts and site facilities, etc.
5.9 winter construction, concrete surface should be covered insulation materials, prevent concrete seas.
6 should pay attention to quality problems
6.1 concrete imperfect: due to the too thickness of blanking, vibrating false or leakage of vibration, hung for template root mortar pouring, honeycomb, pits, or holes; To early to dismantle, concrete grout stick on the template, can cause pitting surface.
6.2 concrete surface uneven, elevation is not allowed, size: due to the horizontal line or small peg, operation is not seriously leveling, concrete spread too thick, causes such as less spread too thin.
6.3 basic axis displacement, bolt holes and diaphragm displacement: mainly improper measures of embedded parts fixed, or concrete, vibration rods inserted are not allowed to be caused by the collision.
6.4 exposure: reinforced or displacement of block, reinforced against template or vibrating untrue, leakage, all can cause exposure.
6.5 gap slag: bad concrete construction joints have sundry, mainly is caused not carefully clean up construction joints.
6.6 irregular cracks: base is too large, internal stress due to hydration heat temperature, the lower concrete combining with bad, maintenance is not enough, or causes such as premature ripping.
7 quality records
This technology standard should have the following quality records
7.1 cement factory certificate and the reinspection do not coincide.
7.2 template elevation, the axis, sizes and service records.
7.3 concrete should try with application form and mix notice issued by the laboratory.
7.4 concrete block 28 d standard compressive strength test report. Commercial concrete shall have the factory certificate.
7.5 embedded parts, bolts, anchor plate, etc. Product certification.
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