Prestressed solid whole floor installation
1 scope
The technology standard is suitable for use in multilayer brick and high-level internal model and plate internal model of the structure of the whole big prestressed solid floor installation process.
2 construction preparation
2.1 material and main equipments:
2.1.1 big floor: no defects such as crack, warp. Shall have the component factory certificate.
2.1.2 cement: label is 425 # silicate cement, ordinary Portland cement and slag Portland cement. Should have the factory certificate. According to the regulations, do a second interview.
2.1.3 sand, medium sand.
2.1.4 major tool: the steel board, crowbar, casing, pipe support, 100 mm x 100 mm wood square, etc.
2.2 operation conditions.
2.2.1 according to the requirements of site construction plan will repair yard formation compaction, the first large plate is placed under the long stow-wood, cushion between short stow-wood every board. When big floor board width of 3170 mm or less, stow-wood length 400 mm, width is 3770 mm, the chock is 500 mm long. Stow-wood acuity 50 mm thick, stow-wood parallel plate edge is placed. As shown in figure 4-41. Stow-wood to aligned from top to bottom, flat MATS, can not have a corner road.the phenomenon. Every crib stack up to 9. Big floor carry in the car when the stack is also should be the same.
Figure 4-41
2.2.2 check whether there is big floor factory certificate. Then the appearance quality inspection, the floor that do not conform to the quality
Requirements shall not be used, such as large floor board face or convex key has a crack or damage, shall be used.
2.2.3 check wall axis and elevation, the comparison hoisting figure check big floor type and specification. Find out the direction of the hole on the floor and the drawings are the same.
2.2.4 cast-in-site concrete repair wall height, the wall height should be lower than bottom elevation of 10 to 20 mm, such as concrete wall height low, should fill concrete leveling; And concrete wall plate bottom elevation above the cut, should take to ensure that accords with a requirement on the floor surface elevation. Wall axis offset much, should be adjusted, to ensure that large floor wall length conform to requirements.
3 operation process
3.1 process:
Plastering mortar screed-coat or hard branch mode to hoisting large floor, adjust the position to arrange binding rebar
3.2 plastering mortar screed-coat or hard branch mode: before installation of big floor, according to the elevation at the top of the wall wall concrete leveling layer, leveling layer of cement mortar mixing ratio is 1:3. Such as using rigid frame shuttering, wall elevation of concrete should be jin 1 ~ 2 cm.
3.3 hoisting large floor: first of all find out before hoisting large floor entrance location (including heating, gas, electric pipe hole), and a large floor direction signs; Do not design drawing to find out each room of the big slab used model is correct. Plate end when installation on the wall body factory, slowly settled after decoupling.
3.4 adjustment plate location: what a big floor quadrilateral lap length to make it meet the design requirements, then the adjacent two boards of 6 phi 12 Rachel steel welded to each other, the length of the weld shall be 90 mm or higher, welding quality should be consistent with the provisions of the welding procedures.
Around 3.5 finishing binding reinforcement: out board of prestressed reinforcing steel bar bent into a circular arc shape, spread in the plate seam, ring beam or the wall, not straight curved turn hard, practice as shown in figure 4-42.
In the cross wall thickness
D1 in longitudinal wall thickness
D2 in cross the wall
In a vertical wall
B on the gables
c
Multilayer 140 160 5 to 10 to 15
Top 15 10 to 15, 160, 160
Figure 4-42
4 quality standards
4.1 ensure projects:
4.4.1 the lifting component concrete strength must comply with the design requirements and construction norms. Check the component factory certificate.
4.1.2 slab joints of concrete must be accurate, cast close-grained, serious maintenance, its strength must meet the design requirements or construction norms. Check the concrete block test report.
4.1.3 floor types, location and protection anchor must comply with the design requirements, and no deformation and damage phenomenon. Check the lifting record.
4.2 the basic items:
2 floor elevation, sit pulp comply with the design requirements and construction norms.
4.2.2 shall ensure that two adjacent plate welded steel lap length, surface should be smooth, weld sag, no crack, flash, porosity, slag inclusion and biting edge.
4.3 allowable deviation projects, see table 4-38.
5 finished product protection
5.1 install large slab, the concrete strength of the wall above 4 mpa for installation.
Big floor installation allowable deviation table 4-38
Project allows deviation (mm) test method
Axis position offset 5 'quantity check
High layer + 10 quantity check with level or ruler
Aside the floor length + 10 feet quantity check
On the same axis of the adjacent plate surface elevation difference check 5 'quantity
5.2 shall not be arbitrarily pick out hole in the floor.
5.3 when hoisting floor shall not be any touch cast-in-situ wall.
6 should pay attention to quality problems
6.1 the unqualified large floor on the wall: detailed check before the installation, should look.
6.2 large floor installation direction and drawing is not in conformity with the signs: due to the large slab side marks do not conform to the requirements of the drawings, hole location and drawings does not conform to, picked at random chisel big slab structure. Before installation should be carefully checked.
6.3 a wall plate end length is not enough: no line on the wall when hoisting in place, or not seriously adjustment, cause end wall is too little.
6.4 installing a floor board side out of reinforcement are not allowed to be cut off; Nor should the keyway take off; Also can't take out the steel pressure under the adjacent plate.
6.5 when installing large floor regardless of adopts hard frame mode branch or leveling layer, its elevation should comply with the design requirements, use support should have enough stiffness, guarantee not sink.
7 quality records
This process standards should have the following quality records;
7.1 component factory certificate.
7.2 steel factory quality certificate or test report.
7.3 steel mechanics performance test report.
7.4 the wall concrete, plate seam concrete test report.
7.5 prefabricated segments.
7.6 component installation engineering quality inspection record separately.
1 scope
The technology standard is suitable for use in multilayer brick and high-level internal model and plate internal model of the structure of the whole big prestressed solid floor installation process.
2 construction preparation
2.1 material and main equipments:
2.1.1 big floor: no defects such as crack, warp. Shall have the component factory certificate.
2.1.2 cement: label is 425 # silicate cement, ordinary Portland cement and slag Portland cement. Should have the factory certificate. According to the regulations, do a second interview.
2.1.3 sand, medium sand.
2.1.4 major tool: the steel board, crowbar, casing, pipe support, 100 mm x 100 mm wood square, etc.
2.2 operation conditions.
2.2.1 according to the requirements of site construction plan will repair yard formation compaction, the first large plate is placed under the long stow-wood, cushion between short stow-wood every board. When big floor board width of 3170 mm or less, stow-wood length 400 mm, width is 3770 mm, the chock is 500 mm long. Stow-wood acuity 50 mm thick, stow-wood parallel plate edge is placed. As shown in figure 4-41. Stow-wood to aligned from top to bottom, flat MATS, can not have a corner road.the phenomenon. Every crib stack up to 9. Big floor carry in the car when the stack is also should be the same.
Figure 4-41
2.2.2 check whether there is big floor factory certificate. Then the appearance quality inspection, the floor that do not conform to the quality
Requirements shall not be used, such as large floor board face or convex key has a crack or damage, shall be used.
2.2.3 check wall axis and elevation, the comparison hoisting figure check big floor type and specification. Find out the direction of the hole on the floor and the drawings are the same.
2.2.4 cast-in-site concrete repair wall height, the wall height should be lower than bottom elevation of 10 to 20 mm, such as concrete wall height low, should fill concrete leveling; And concrete wall plate bottom elevation above the cut, should take to ensure that accords with a requirement on the floor surface elevation. Wall axis offset much, should be adjusted, to ensure that large floor wall length conform to requirements.
3 operation process
3.1 process:
Plastering mortar screed-coat or hard branch mode to hoisting large floor, adjust the position to arrange binding rebar
3.2 plastering mortar screed-coat or hard branch mode: before installation of big floor, according to the elevation at the top of the wall wall concrete leveling layer, leveling layer of cement mortar mixing ratio is 1:3. Such as using rigid frame shuttering, wall elevation of concrete should be jin 1 ~ 2 cm.
3.3 hoisting large floor: first of all find out before hoisting large floor entrance location (including heating, gas, electric pipe hole), and a large floor direction signs; Do not design drawing to find out each room of the big slab used model is correct. Plate end when installation on the wall body factory, slowly settled after decoupling.
3.4 adjustment plate location: what a big floor quadrilateral lap length to make it meet the design requirements, then the adjacent two boards of 6 phi 12 Rachel steel welded to each other, the length of the weld shall be 90 mm or higher, welding quality should be consistent with the provisions of the welding procedures.
Around 3.5 finishing binding reinforcement: out board of prestressed reinforcing steel bar bent into a circular arc shape, spread in the plate seam, ring beam or the wall, not straight curved turn hard, practice as shown in figure 4-42.
In the cross wall thickness
D1 in longitudinal wall thickness
D2 in cross the wall
In a vertical wall
B on the gables
c
Multilayer 140 160 5 to 10 to 15
Top 15 10 to 15, 160, 160
Figure 4-42
4 quality standards
4.1 ensure projects:
4.4.1 the lifting component concrete strength must comply with the design requirements and construction norms. Check the component factory certificate.
4.1.2 slab joints of concrete must be accurate, cast close-grained, serious maintenance, its strength must meet the design requirements or construction norms. Check the concrete block test report.
4.1.3 floor types, location and protection anchor must comply with the design requirements, and no deformation and damage phenomenon. Check the lifting record.
4.2 the basic items:
2 floor elevation, sit pulp comply with the design requirements and construction norms.
4.2.2 shall ensure that two adjacent plate welded steel lap length, surface should be smooth, weld sag, no crack, flash, porosity, slag inclusion and biting edge.
4.3 allowable deviation projects, see table 4-38.
5 finished product protection
5.1 install large slab, the concrete strength of the wall above 4 mpa for installation.
Big floor installation allowable deviation table 4-38
Project allows deviation (mm) test method
Axis position offset 5 'quantity check
High layer + 10 quantity check with level or ruler
Aside the floor length + 10 feet quantity check
On the same axis of the adjacent plate surface elevation difference check 5 'quantity
5.2 shall not be arbitrarily pick out hole in the floor.
5.3 when hoisting floor shall not be any touch cast-in-situ wall.
6 should pay attention to quality problems
6.1 the unqualified large floor on the wall: detailed check before the installation, should look.
6.2 large floor installation direction and drawing is not in conformity with the signs: due to the large slab side marks do not conform to the requirements of the drawings, hole location and drawings does not conform to, picked at random chisel big slab structure. Before installation should be carefully checked.
6.3 a wall plate end length is not enough: no line on the wall when hoisting in place, or not seriously adjustment, cause end wall is too little.
6.4 installing a floor board side out of reinforcement are not allowed to be cut off; Nor should the keyway take off; Also can't take out the steel pressure under the adjacent plate.
6.5 when installing large floor regardless of adopts hard frame mode branch or leveling layer, its elevation should comply with the design requirements, use support should have enough stiffness, guarantee not sink.
7 quality records
This process standards should have the following quality records;
7.1 component factory certificate.
7.2 steel factory quality certificate or test report.
7.3 steel mechanics performance test report.
7.4 the wall concrete, plate seam concrete test report.
7.5 prefabricated segments.
7.6 component installation engineering quality inspection record separately.
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