Inside the brick, brick mold structure post, ring beam, plate seam reinforcement assembling process

1 scope

This process within the standard applicable to the brick structure, brick structure of the constructional column, ring beam, plate seam reinforcement assembling process.

2 construction preparation

2.1 material and main equipments:

2.1.1 reinforced: should have the factory certificate, in accordance with the provisions for mechanical properties of the second interview, when added a brittle fracture occurred in special circumstances, such as still need to test for chemical composition. Reinforcement should be no old rust and oil pollution.

2.1.2 the wire; Can use 20 ~ 22 (HuoShaoSi) wire or galvanized iron wire, galvanized iron wire).

2.1.3 control concrete cover with mortar pad, plastic card.

2.1.4 tool: the steel hook, crowbar, steel board, binding frame, steel wire brush, trolleys, chalk, ruler, etc.

2.2 operation conditions:

2.2.1, as stipulated in the construction site plan will be clean, smooth, reinforced yard ready timbers. According to different specifications pile up and take good crosser.

2.2.2 check reinforced level, type, shape, size and quantity, whether or not the same as the design drawings and processing ingredients list.

2.2.3 play good elevation and constructional column, horizontal brick mold concrete wall skin line.

2.2.4 ring beam and the plate seam is done with preview the template, and will clean up the mould.

2.2.5 prestressed hole board side hole has been blocked according to the requirement of the standard drawing g44 (96).

3 operation process

3.1 constructional column steel binding:

3.1.1 process:

Prefabricated constructional column reinforced skeleton to trim the bottom out of the constructional column tower after reinforcement

Installation and constructional column reinforced skeleton binding lap stirrups

3.1.2 prefabricated constructional column reinforced skeleton:

3.1.2.1 two vertical reinforced flat on first tie rack, and draw the stirrup spacing on the reinforcement.

3.1.2.2 according to line drawing position, the set of stirrup on the bearing steel tie them one by one, to set aside the length of the lap joint parts. In order to prevent deformation, appropriate USES button nazism or set of binding. Stirrup should keep vertical with reinforced; Stirrup bend hook composite, should be placed along the direction of reinforced stagger.

3.1.2.4 permission levels in two additional force reinforcement and stirrup binding is firm, stirrup end straight length of not less than 10 d (d stirrup diameter), hook Angle of not less than 135 °.

On the pillars, column foot handover with ring beam reinforcement, should according to the design requirements of stirrup encryption column, encryption scope under the general on the ring beam, all should not be less than one 6 of the height or 45 cm, stirrup spacing should not be more than 10 cm (column foot stirrup encryption area for column frame set up lap after binding).

3.1.3 trim out at the bottom of the post lap steel: according to the line has put a good post position, lap rib location and examine whether the lap length comply with the design and specification requirements. The underlying constructional column vertical reinforcement and foundation ring beam anchorage; Without base ring beam, buried within the column concrete of bridge, as shown in figure 4-2; When the wall with trench, constructional column embedding depth should be greater than the groove depth.

Figure 4-2

(a) based on ring beam; (b) no base ring beam

3.1.4 constructional column reinforced skeleton installation: the first position the stirrup on take it reinforced, then put up prefabricated constructional column reinforced skeleton, for reaching lap, lap times no less than 35 d, elevation lines, for good in vertical rib lap the three buttons. Skeleton, stirrup encryption can bind root zone.

3.1.5 steel banding lap sites:

3.1.5.1 constructional column reinforcement must be connected with the layers of vertical and horizontal wall of ring beam reinforcement assembling, form a closed frame.

3.1.5.2 in brick wall if Malaysia teeth, along the wall every 50 cm high embedding two phi 6 levels of Rachel reinforcement, connected to the constructional column steel binding, as shown in figure 4-3.

Figure 4-3

3.1.5.3 when the reduction set in the absence of the external walls of the cross wall, constructional column reinforced with cast-in-place or precast beam tie beam end connection structure, to meet the multi-layer brick setting reinforced concrete constructional column seismic design and construction (JGJ13-82), the provisions of article 3.2.5.

After 3.1.5.4 build by laying bricks or stones the brick wall, deal with constructional column reinforcement for renovation, to guarantee the accuracy of the reinforcement position and spacing.

3.2 ring beam reinforced binding:

3.2.1 process:

Draw bar line of position to put the stirrup - wear ring beam bearing steel - binding stirrups

3.2.2 the ring beam template and finish preview, can tie ring beam reinforcement, if using precast frame, frame can be assembled according to number of the hoisting in place. Such as binding in the module, spacing, according to the requirements of design drawings in the template side help draw stirrup of line. Wear reinforced after put the stirrup. Stirrup set it should be along the reinforced each other stagger.

3.2.3 ring beam and constructional column reinforced junction, ring beam reinforcement should be on the inside of the constructional column reinforced. Ring beam reinforcement in constructional column lap, lap times or anchor into the column length should comply with the design requirements.

3.2.4 ring beam reinforced the lap length to conform to the concrete structure engineering construction and acceptance standard "(GB50204-92) to the requirements of reinforced lap.

3.2.5 ring beam reinforcement should be each other hand in turn, in the interior wall junction, wall corner of anchorage length, to comply with the design requirements.

3.2.6 stairwells, attached to the wall, chimney, and the mouth of the cave was cut off parts of the ring beam steel chute, should lap reinforcing, constructor should comply with the design requirements, elevation difference of ring beam reinforcement, should according to the design requirements lap or connection.

3.2.7 installed on the gable ring beam of prestressed round hole plate, its exposed prestressed reinforcement (i.e., the beard tendons) according to the standard atlas 96 g44 to anchor into within the ring beam reinforcement.

3.2.8 ring frame reinforced after the tie, should add cement mortar pad, to control the stress of reinforced protective layer.

3.3 plate steel binding

The process flow

Supporting seam template - > slab end of prestressed anchoring reinforcement bending and 45 °

Put on the level and structure reinforcement and plate end anchorage reinforcement binding

3.3.2 rainfall distribution on 10-12 finished the preview, the plate seam template will be prefabricated circular orifice exposed tendon (i.e., the beard tendons) bent into a curved, two boards of prestressed exposed reinforced cross each other, and then tie tong long phi 6 level structure and vertical Rachel reinforcement, as shown in figure 4.

Figure 4-4

3.3.3 long to the plate in the middle on the bearing steel bar connection structure as shown in figure 4-5.

Figure 4-5

We do on both sides of the wall height is not at the same time, the reinforced structure as shown in figure 4 to 6.

3.3.5 precast slab longitudinal seam steel binding as shown in figure 4 to 7.

Figure 4-6 figure 4 to 7

3.3.6 constructional column, ring beam, slab joint reinforced tied after, are required to do take cover engineering inspection, qualified rear can be carried out under the procedure.

4 quality standards

4.1 ensure projects:

4.4.1 quality and varieties of steel must comply with the design requirements and the provisions of the relevant standards, imported steel chemical composition inspection must be conducted before welding and welding test, accord with the relevant provisions of the rear can welding.

Inspection method: inspect the factory quality certificate and test report.

4.1.2 steel surface should be clean, with granule or flake old rust, after descaling is pitting reinforcement, it is forbidden to use according to the original specifications.

4. L. 3 steel butt welding or arc welding welding joint, take the specimen by the regulation, its mechanical performance test results must comply with the provisions of the specification rebar welding and acceptance.

4.2 the basic items:

2 steel banding, button missing, string does not exceed the number of bound of the number of 10%, and should not be concentrated.

4.2.2 hook towards the right, should comply with the binding joint construction of the norms, the lap length is not less than the specified value.

Holdings by the level of Ⅰ stirrup of cold drawn steel or low carbon steel wire production, its quantity, peace hook Angle straight length, shall comply with the design requirements and construction norms.

4.2.4 butt joint without the transverse crack and burn, uniform package, welding joints bend is not greater than 4 °, the axis displacement is not greater than 0.1 d, month. MRN no greater than 2. Arc welding joint, the weld surface level off, without cave, no flash, no cracks, porosity, slag inclusion and joint bite edge. Bending is not more than 4 °, joint steel axis displacement is not greater than 0.1 d, and no more than 3 mm. Weld thickness is not more than 0.05 d, not less than 0.1 d wide, length is not less than 0.5 d.

4.3 allowable deviation project, are shown in table 4 to 7.

Constructional column, ring beam and plate steel binding allowable deviation table 4-7

Project item time allowable deviation test method (mm)

1 frame width and height of the plus or minus 5 'quantity check

2 the length of the skeleton plus or minus 10 feet quantity check

Spacing of plus or minus 10

Row spacing + / - 5

4 stirrup, tectonic spacing + 20 feet three gears, take its maximum value

Displacement of the center line of the five

Level elevation difference + 3, 0

Force reinforced protective layer 6 + 5 'quantity check

5 finished product protection

5.1 constructional column and ring beam reinforcement, such as using precast frame, should be put in designated place mat PingMa neatly.

5.2 to floor hang yun steel storage, clean up good location, in order to avoid deformation.

5.3 shall not be trampled has tied a good reinforcement and ring beam reinforcement shall not be beam bottom brick loose touch.

6 should pay attention to quality problems

Deformation: 6.1 steel reinforcement skeleton binding tie clasp method should be paid attention to, appropriate USES button cross or set of binding.

6.2 stirrup spacing is not in conformity with the requirement: more reinforcement for Rachel place brick wall caused by touch to move, when should be build by laying bricks or stones after nap time before closing.

6.3 improper floor end of reinforced connection: should be in before floor lifting plate end exposed prestressed concrete curved into 45 °, hoisting in place after the gatun long steel binding. At the same time should pay attention to in the process of installation of floor, must not be exposed tendon broken plate end.

6.4 balcony place reinforced crushed: the balcony of ring beam as the "L" shape stirrup, must pay attention to the protection of the hoisting, such as damaged, should be the balcony lift, nap after reinforcement, then in the balcony.

Steel bar displacement 6.5 constructional column: in addition to the constructional column out of reinforcement and ring beam rebar tie, and stretch out tied to a location of stirrup reinforcement, after pouring the concrete, shall be immediately repair.

6.6 plate seam tendons exposed: longitudinal seam reinforcement should tie up mortar boards, transverse joints to tie bar on the board end exposed tendon.

7 quality records

This technology standard should have the following quality records:

7. L steel factory quality certificate or test report.

7.2 steel mechanical performance test report.

7.3 should be imported steel chemical composition inspection report and solderability test report, in domestic steel processing cell broken, bad welding performance and mechanical performance significantly abnormal, should have a chemical composition inspection report.

7.4 steel component project quality inspection assessment data.

7.5 item of reinforcement concealed engineering acceptance records.