(2) When grout setting material is used at the bottom of multi-storey precast shear wall, its thickness should not be greater than 20mm.

Block for interlayer 100mm × 100mm × 500mm square timber shall be separated to ensure that the horizontal projection of the square timber between layers coincides with the H-section steel.

2.

The wallboard shall be stored in a special cubic storage rack.

The number of storage layers shall not exceed 8 and the height shall not exceed 1.5m.

Before installing (1) precast components with reinforced sleeve grouting connection and reinforced mortar anchor lap connection in place, the following contents shall be checked: 1) specification, position, quantity and depth of sleeve and reserved hole; 2) The specification, quantity, position and length of the connected reinforcement shall be cleaned when there are sundries in the sleeve and reserved opening; When the connecting reinforcement is inclined, it shall be straightened.

When the width of the wallboard is greater than 4m or there is a doorway hole, three 100mm pads shall be placed at the lower part of the wallboard × 100mm × 250mm square timber, one square timber at 300mm from both ends of the wall and one at the center of gravity of the wall.

2.

The first laminated floor slab shall be placed on the H-shaped steel to ensure that the truss is perpendicular to the section steel, and the section steel is 500 ~ 800mm away from the side of the member.

Wooden structure 1.

If the length is too long, an H-shaped steel shall be placed at an interval of 4m in the middle, and two layers shall be stacked at most according to the length and weight of the member.

When the width of the wallboard is less than 4m, the lower part of the wallboard shall be padded with 2 pieces of 100mm × 100mm × 250mm square timber, one square timber at 30mm away from the wall at both ends.

Storage (1) placement of laminated floor slab.

(4) When installing precast bending members, the laying length of the end shall meet the design requirements.

(2) During the installation of high-rise steel structure, the influence of vertical compression deformation on the structure shall be included, and measures such as pre adjusting the installation elevation and setting the rear connecting members shall be taken according to the structural characteristics and influence degree.

The first layer of beam shall be placed on the H-shaped steel to ensure that the length direction is perpendicular to the section steel.

Steel structure 1.

When the steel structure is heated between 100 ℃ and 250 ℃, the tensile strength of the steel structure decreases and the plasticity increases with the increase of temperature; When the temperature reaches about 250 ℃, the tensile strength of the steel structure increases slightly, but the plasticity continues to decrease, resulting in “blue brittleness”; When the temperature exceeds 250 ℃, the steel structure will appear “creep phenomenon”; When the temperature reaches 500 ℃, the strength of steel structure is very low, which is easy to cause production damage, economic loss and even casualties.

Grout or support cushion block shall be set between the end and the support member, and the thickness of grout or support cushion block shall not be greater than 20mm.

The components stacked on the construction site should be stacked according to the installation sequence.

BIM Technology can be used for virtual construction of structural components, building components and equipment pipelines.

The stairs shall be stored in the designated storage area, and the ground of the storage area shall be horizontal.

4 pieces 100mm for interlayer × 100mm × 250mm square timber shall be separated, and the four square timber positions at the four corners shall be placed parallel to the section steel.

100mm for interlayer × 100mm × 500mm square timber shall be separated to ensure that the horizontal projection of square timber between layers coincides with H-shaped steel.

(3) The precast exterior wall panel can be permanently fixed only after the axis, elevation and vertical dispatching are checked.

Remember to take out your little notebook and take notes! Concrete structure 1.

(2) Special storage rack for wallboard cube.

The deviation of connecting reinforcement from the center line of sleeve or hole shall not exceed 5mm.

(3) During grouting construction, the ambient temperature should not be lower than 5 ℃; When the curing temperature of the connecting part is lower than 10 ℃, heating and surrounding measures must be taken.

Source: with the vigorous promotion of precast construction, precast construction projects are gradually increasing.

In order to enhance the project quality and construction standardization, on June 1, 2017, the Ministry of housing and urban rural development began to implement three relevant precast standards (GB / t51231-2016 technical standard for precast concrete buildings, GB / t51233-2016 technical standard for precast wood structure buildings, and GB / t51232-2016 technical standard for precast steel structure buildings).

(5) Storage of columns.

Therefore, the thermal insulation and fire protection design of steel structure is extremely important, and the ambient temperature must also be paid attention to in storage.

The section steel is 500 ~ 800mm away from the side of the member.

(4) When stacking curve components, corresponding protective measures shall be taken according to the component shape..

During overlapping stacking, the cushion blocks between components in each layer shall be aligned up and down, and the number of stacking layers shall be determined according to the bearing capacity of components and cushion blocks.

When the strip is installed with double-layer wall panels, the joint of the inner and outer wall panels should be staggered.

The stacking should be arranged in the area within the working range of the crane and not affected by the construction of other processes.

If the length is too long, an H-section steel shall be placed at an interval of 4m in the middle, and the maximum three layers shall be stacked according to the length and weight of the member.

The first layer of columns shall be placed on the H-section steel to ensure that the length direction is perpendicular to the section steel.

The storage steel structure has poor fire resistance and is greatly affected by temperature.

The section steel is 500 ~ 800mm away from the side of the member.

Storage (1) wooden components shall be stored in a well ventilated warehouse or a rainproof and well ventilated place with a roof cover.

The second and third steps at the left and right ends of the folding ladder shall be padded with 4 blocks of 100mm × 100mm × 500mm square timber, 250mm from the front and rear sides, to ensure that the horizontal projection of square timber between layers coincides, and the number of storage layers shall not exceed 6.

Today, we will focus on the above standards to talk about what should be paid attention to in the construction of precast buildings.

Cast In Loop

(2) Corresponding measures shall be taken to prevent component deformation when the stack is placed horizontally.

Installation (1) precast steel structure buildings can adopt information technology to carry out information-based collaborative management of the whole process of safety, quality, technology and construction progress.

(3) When stacking against the frame, the inclination angle between the frame and the ground should be greater than 80 °.

(4) Storage beam.

(3) Storage of stairs.