System stairs, rest board and garbage road installation
1 range
This technology standard applies to the general civil construction reinforced concrete prefabricated stairs and the trash road installment project.
2 construction preparation
2.1 Materials and main equipment:
2.1.1 reinforced concrete prefabricated staircase rest board, stepping board, single-run staircase beams, garbage Road and other components of the model, specifications, quality should meet the design requirements, accompanied by a factory certificate.
2.1.2 Cement: No. 325 Portland cement, ordinary Portland cement, slag Portland cement.
2.1.3 sand: the sand.
2.1.4 fine stone: particle size 0.5 ~ 3.2cm.
2.1.5 steel: flat outline specifications. 40mm × 6mm, angle steel specifications ∠ 50 × 6mm.
2.1.6 Electrode: E4303, must have factory certificate.
2.1.7 main equipment: crowbars, hooks, sling, ring, horn, steel wedge, water for, cross hanging beams, inverted chain and so on.
2.2 Operating conditions:
2.2.1 Component stacking site should be a solid formation, when the pile of water near the hook pad, mat thickness is higher than the hook, and in the vicinity of the hook. Dune should be aligned up and down, on the same vertical line.
2.2.2 Before the lifting of the staircase components for quality inspection, where the quality does not meet the requirements of the most requested components shall not be used, and the components will not meet the requirements of the obvious marks of defects. Should be identified with the design unit, to take measures to negotiate, and conscientiously carried out reinforcement into the repair before use.
2.2.3 pre-pop-up on the wall pre-board, rest board, staircase beam and other components of the position line, elevation line, control the level of the upper and lower staircase horizontal distance and elevation, to avoid the installation of the pedal, the support length is not enough or support the length is too short Ann is not going.
2.2.4 to bear the first floor of the first run step board at the bottom of the cast-in-place beam section and elevation to meet the design drawings. Prior to installation of the step board, the cast-in-place beam concrete must meet the installation strength.
2.2.5 will be a large template of concrete wall reserved for the rest board and staircase hole clean, and according to the level of mortar.
2.2.6 concrete wall strength of the wall to reach more than 4MPa.
2.2.7 pre-embedded parts of all components on the surface of Lu Ming, and embedded parts of the surface residual mortar and other items clean up.
3 operating process
3.1 Process flow:
Watering mud → install the rest board → install the stairs → welding → irrigation → security garbage Road
3.2 watering mud; security rest board, should be installed with the installation hole in place with pouring thick mud, water-cement ratio of 0.5. And ensure that the rest board and the wall contact dense.
3.3 Installation of the rest board: First check the installation position line and elevation line, the installation of the rest plate stretcher end of the rope should be higher than the other end, in order to make the sloping plate into the bearing hole tilt. After the lifting plate is lifted, the mounting position is lowered slowly. After the stability, check whether the elevation and position of the board meet the requirements of the drawing, and use the crowbars to move it so that the ends of both ends are equal to each other.
3.4 staircase installation: the installation of the staircase, the lifting rigging on the chain to adjust the length of the rope side, then stepping surface level. Resting board support surface watering and water-cement ratio of 0.5 cement slurry, so that bearing contact closely. If the support surface is not strict porosity, use iron wedge leveling, and then cement mortar plug dense.
3.5 Welding: When the stair section is installed and corrected, it should be welded according to the requirements of the design drawing. The welding seam should be filled with the embedded iron piece of the staircase section and the resting board, with the connecting steel plate (size not less than the drawing) 50.
Figure 4-50
3.6 irrigation joints: each floor after the installation of the stairs, the rest of the board should be promptly at both ends of the wall and the gap between the mold-pouring concrete. Mold clean, concrete with C20 fine stone concrete, vibrating dense, and pay attention to conservation.
3.7 Trash Road Installation:
3.7.1 Multi-layer brick and concrete structure The garbage road is installed at the inner side of the corners. Generally, each floor rest board is installed after hoisting garbage road. The trash between the riser board with the connection plate welded to the bottom of the board embedded in the iron, welded firmly. The end slab of vertical plate is cemented with cement mortar. The middle embedded part of trash road vertical plate and the embedded iron parts of wall.
3.7.2 high-rise large-scale structure of rectangular reinforced concrete precast refuse Road, generally located in the stairs outside, with the floor construction schedule for installation.
3.7.3 When the garbage road is lifted, aim at the mouth of the lower trash road, then straighten the hanging ring and the main structure.
3.7.4 Check the location is correct, straight up and down without dislocation, can be welded. Between the garbage road and the main structure, between the garbage Road and refuse Road embedded iron parts, are connected with iron welding firm.
4 quality standards
4.1 Warranty items:
4.1.1 The concrete strength must be in accordance with the design requirements and construction specifications when hoisting.
4.1.2 The model, position and anchor of the component must meet the design requirements, and no deformation damage phenomenon.
4.1.3 Concrete joints or concrete joints must be metered accurately, pounded and compacted, and should be conscientiously maintained, the strength must meet the design requirements or construction specifications.
4.2 Basic items: The weld length of the connecting piece of the component joint shall meet the design requirements. The surface of the welding seam is smooth, free from depression, weld, and no cracks, stomata, slag and undercut.
4.3 Allowable deviation items:
Allowable deviation of the installation of stairs garbage road
The position offset is 10 mm
The elevation is ± 5mm
5 protection of finished products
5.1 Ladders, rest plates shall be taken upright, transported and stacked. When the components are transported and stacked, the dunnage should be placed in the vicinity of the rings, and above the rings, up and down alignment. Trash Road vertical stacked.
5.2 piling site should be flat compaction, paving under the board. The stairs of each stack should not be placed more than 6 blocks, rest board no more than 10 per stack.
5.3 stairs after installation, should be stepping surface to be protected in time to avoid the construction will be stepping angular damage.
5.4 When installing rest board and stair section, do not hit brick walls or concrete walls on both sides.
6 should pay attention to quality problems
6.1 staircase section support bad: The main reason is the bearing at the contact is not real or lap length is not enough. When installing the rest board, check the height of the stair section. In addition to the calibration level, install the stair section.
6.2 staircase stem pendulum: The main reason is improper operation, the installation does not sit slurry, dry floating place, after the installation is not timely grouting. Installation should be strictly in accordance with the design requirements of water slurry, installed in time after the irrigation joints.
6.3 welding does not meet the requirements: component connection is only used at both ends of the short steel bars, affect the overall performance of the structure. Should be based on design requirements, with a solid connection around the welding iron.
6.4 Rest board surface and stepping board surface then Cha height does not meet the requirements: the main reason is copied flat line is not allowed to install the elevation does not meet the design requirements. Attention should be paid to the level of elevation and the accuracy of the horizontal position line.
6.5 garbage Road is not straight and the location of the trash port does not meet the design requirements: the installation is not strictly in accordance with the design requirements in place and elevation elevation.
6.6 Lateral reverse: the installation should pay attention to the location of handrail embedded parts.
7 Quality records
This process standard shall have the following quality records:
7.1 Component factory certificate.
7.2 Cement factory certificate and test report.
7.3 sand and stone test report.
7.4 welding rod certificate.
7.5 Pre-inspection records.
This technology standard applies to the general civil construction reinforced concrete prefabricated stairs and the trash road installment project.
2 construction preparation
2.1 Materials and main equipment:
2.1.1 reinforced concrete prefabricated staircase rest board, stepping board, single-run staircase beams, garbage Road and other components of the model, specifications, quality should meet the design requirements, accompanied by a factory certificate.
2.1.2 Cement: No. 325 Portland cement, ordinary Portland cement, slag Portland cement.
2.1.3 sand: the sand.
2.1.4 fine stone: particle size 0.5 ~ 3.2cm.
2.1.5 steel: flat outline specifications. 40mm × 6mm, angle steel specifications ∠ 50 × 6mm.
2.1.6 Electrode: E4303, must have factory certificate.
2.1.7 main equipment: crowbars, hooks, sling, ring, horn, steel wedge, water for, cross hanging beams, inverted chain and so on.
2.2 Operating conditions:
2.2.1 Component stacking site should be a solid formation, when the pile of water near the hook pad, mat thickness is higher than the hook, and in the vicinity of the hook. Dune should be aligned up and down, on the same vertical line.
2.2.2 Before the lifting of the staircase components for quality inspection, where the quality does not meet the requirements of the most requested components shall not be used, and the components will not meet the requirements of the obvious marks of defects. Should be identified with the design unit, to take measures to negotiate, and conscientiously carried out reinforcement into the repair before use.
2.2.3 pre-pop-up on the wall pre-board, rest board, staircase beam and other components of the position line, elevation line, control the level of the upper and lower staircase horizontal distance and elevation, to avoid the installation of the pedal, the support length is not enough or support the length is too short Ann is not going.
2.2.4 to bear the first floor of the first run step board at the bottom of the cast-in-place beam section and elevation to meet the design drawings. Prior to installation of the step board, the cast-in-place beam concrete must meet the installation strength.
2.2.5 will be a large template of concrete wall reserved for the rest board and staircase hole clean, and according to the level of mortar.
2.2.6 concrete wall strength of the wall to reach more than 4MPa.
2.2.7 pre-embedded parts of all components on the surface of Lu Ming, and embedded parts of the surface residual mortar and other items clean up.
3 operating process
3.1 Process flow:
Watering mud → install the rest board → install the stairs → welding → irrigation → security garbage Road
3.2 watering mud; security rest board, should be installed with the installation hole in place with pouring thick mud, water-cement ratio of 0.5. And ensure that the rest board and the wall contact dense.
3.3 Installation of the rest board: First check the installation position line and elevation line, the installation of the rest plate stretcher end of the rope should be higher than the other end, in order to make the sloping plate into the bearing hole tilt. After the lifting plate is lifted, the mounting position is lowered slowly. After the stability, check whether the elevation and position of the board meet the requirements of the drawing, and use the crowbars to move it so that the ends of both ends are equal to each other.
3.4 staircase installation: the installation of the staircase, the lifting rigging on the chain to adjust the length of the rope side, then stepping surface level. Resting board support surface watering and water-cement ratio of 0.5 cement slurry, so that bearing contact closely. If the support surface is not strict porosity, use iron wedge leveling, and then cement mortar plug dense.
3.5 Welding: When the stair section is installed and corrected, it should be welded according to the requirements of the design drawing. The welding seam should be filled with the embedded iron piece of the staircase section and the resting board, with the connecting steel plate (size not less than the drawing) 50.
Figure 4-50
3.6 irrigation joints: each floor after the installation of the stairs, the rest of the board should be promptly at both ends of the wall and the gap between the mold-pouring concrete. Mold clean, concrete with C20 fine stone concrete, vibrating dense, and pay attention to conservation.
3.7 Trash Road Installation:
3.7.1 Multi-layer brick and concrete structure The garbage road is installed at the inner side of the corners. Generally, each floor rest board is installed after hoisting garbage road. The trash between the riser board with the connection plate welded to the bottom of the board embedded in the iron, welded firmly. The end slab of vertical plate is cemented with cement mortar. The middle embedded part of trash road vertical plate and the embedded iron parts of wall.
3.7.2 high-rise large-scale structure of rectangular reinforced concrete precast refuse Road, generally located in the stairs outside, with the floor construction schedule for installation.
3.7.3 When the garbage road is lifted, aim at the mouth of the lower trash road, then straighten the hanging ring and the main structure.
3.7.4 Check the location is correct, straight up and down without dislocation, can be welded. Between the garbage road and the main structure, between the garbage Road and refuse Road embedded iron parts, are connected with iron welding firm.
4 quality standards
4.1 Warranty items:
4.1.1 The concrete strength must be in accordance with the design requirements and construction specifications when hoisting.
4.1.2 The model, position and anchor of the component must meet the design requirements, and no deformation damage phenomenon.
4.1.3 Concrete joints or concrete joints must be metered accurately, pounded and compacted, and should be conscientiously maintained, the strength must meet the design requirements or construction specifications.
4.2 Basic items: The weld length of the connecting piece of the component joint shall meet the design requirements. The surface of the welding seam is smooth, free from depression, weld, and no cracks, stomata, slag and undercut.
4.3 Allowable deviation items:
Allowable deviation of the installation of stairs garbage road
The position offset is 10 mm
The elevation is ± 5mm
5 protection of finished products
5.1 Ladders, rest plates shall be taken upright, transported and stacked. When the components are transported and stacked, the dunnage should be placed in the vicinity of the rings, and above the rings, up and down alignment. Trash Road vertical stacked.
5.2 piling site should be flat compaction, paving under the board. The stairs of each stack should not be placed more than 6 blocks, rest board no more than 10 per stack.
5.3 stairs after installation, should be stepping surface to be protected in time to avoid the construction will be stepping angular damage.
5.4 When installing rest board and stair section, do not hit brick walls or concrete walls on both sides.
6 should pay attention to quality problems
6.1 staircase section support bad: The main reason is the bearing at the contact is not real or lap length is not enough. When installing the rest board, check the height of the stair section. In addition to the calibration level, install the stair section.
6.2 staircase stem pendulum: The main reason is improper operation, the installation does not sit slurry, dry floating place, after the installation is not timely grouting. Installation should be strictly in accordance with the design requirements of water slurry, installed in time after the irrigation joints.
6.3 welding does not meet the requirements: component connection is only used at both ends of the short steel bars, affect the overall performance of the structure. Should be based on design requirements, with a solid connection around the welding iron.
6.4 Rest board surface and stepping board surface then Cha height does not meet the requirements: the main reason is copied flat line is not allowed to install the elevation does not meet the design requirements. Attention should be paid to the level of elevation and the accuracy of the horizontal position line.
6.5 garbage Road is not straight and the location of the trash port does not meet the design requirements: the installation is not strictly in accordance with the design requirements in place and elevation elevation.
6.6 Lateral reverse: the installation should pay attention to the location of handrail embedded parts.
7 Quality records
This process standard shall have the following quality records:
7.1 Component factory certificate.
7.2 Cement factory certificate and test report.
7.3 sand and stone test report.
7.4 welding rod certificate.
7.5 Pre-inspection records.
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