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591
Bar)
Bricks, sand and cement must be tested before they can be used. Bricks must be watered and moistened the day before laying.
Maintenance: after concrete pouring, 12 hours under normal temperature conditions should be watered maintenance, watering times to keep the surface of concrete wet.
Concrete vibration using insertion type vibrator, set a professional person with a certificate on the post, vibration time to the concrete surface no longer bubble, vibration distance of 30-50 cm, the surface of concrete must be smooth according to the elevation of the horizontal line.
Concrete pouring of the foundation beam must be carried out sequentially in layers and sections from one end to the other end.
The cushion and the side mould must be watered, wet and washed clean, and the concrete pouring of the foundation beam must be carried out sequentially in layers and sections from one end to the other end.
When watering, it is necessary to control concrete rising speed and avoid collision with anchor bolts
Layer a watering is finished, not allowed to set up construction joints, each layer of concrete a unloading foot, the order is the first corner after the middle, so that the mortar is full of template.
The project technical person in charge and the responsible foreman shall, according to the actual situation of the project, formulate feasible irrigation scheme and procedure and make technical disclosure to each operator seriously. In the process of concrete pouring and tamping, the preparation and standard maintenance of specimens should be controlled. When concrete sampling must ask supervision technician stand by witness.
Before pouring concrete, reinforcement, anchor bolts and formwork must be inspected and approved by DFD representative, supervision department and quality supervision department and issued the acceptance record of concealed works before pouring concrete.
When concrete is poured in this project, the manufacturer of commercial concrete must be inspected and approved by the person in charge of DFD management organization.
Section size should meet the requirements of the design drawings, and measure the elevation on the template to control the elevation of the foundation. The template should have enough support strength to prevent mold running.
Template production requirements should be firm, assembly should be appropriate, smooth, the template side plate must be higher than the independent foundation and the upper surface of the beam, in order to pop out the horizontal control line, pull rod support firm.
Before installing the formwork, check the elevation of foundation cushion and the position of center line, and pop out the edge line.
The joint position of the stressed reinforcement bar of the foundation beam must be staggered, and all the joints of the stirrup and the stressed reinforcement bar must be buckled, and the cushion block must be well padded.
The reinforcement of the short side of the independent foundation floor reinforcement should be placed below the long side reinforcement;
Before reinforcing bar binding, check and process semi-finished products according to design drawings.
Before reinforcing bar binding, check and process semi-finished products according to design drawings.、The reinforcement of the short side of the independent foundation floor reinforcement should be placed below the long side reinforcement;
Before reinforcing bar binding, check and process semi-finished products according to design drawings.、The reinforcement of the short side of the independent foundation floor reinforcement should be placed below the long side reinforcement;、The joint position of the stressed reinforcement bar of the foundation beam must be staggered, and all the joints of the stirrup and the stressed reinforcement bar must be buckled, and the cushion block must be well padded.
The steel bar of the same specification and size shall be of the same length, the same length and Angle, and the classification code shall be put neatly and the use position and quantity shall be indicated after the label is affixed.
After bending the steel bar, the Angle is correct, the length of the hook meets the requirements, and the stirrups should be square; The size of the same stirrup is the same, the length of the hook is the same, and the Angle is the same, and the positioning brace is placed neatly, and the label is affixed, indicating the use part, number, etc.;
It is generally stipulated that: when the end of the first level steel bar is bent at 180 degrees, the arc bending diameter is controlled at 2.5 times the diameter of the steel bar, and the length of the straight part is 10D; When the secondary steel bar needs to be bent at 90 degrees or 135 degrees, the bending diameter is controlled at 5 times the diameter of the steel bar, and the flat part is 10D when bending at 135 degrees. The bending radius of the middle part of bending reinforcement is5d
The surface of steel bar should be clean. Oil stains, paint stains and pumped-off skin, rust, etc. should be cleaned before use.
When straightening steel bar with straightening machine, the straightening die and transfer roller should be selected according to the diameter of steel bar, and the pressing degree of straightening die and press roller should be correctly mastered, and the offset of straightening die should be determined according to its wear degree and steel bar variety through the test.
Rebar must have factory certificate, furnace number and test report when entering the site, and quality certificate must be present together with the rebar. Mechanical properties retest shall be conducted after entering the site.
Background processing machinery in the rebar processing before debugging in place, full-time maintenance by the mechanic, to ensure the normal use of machinery and precision adjustment.
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