Installation and construction steps of the booth:

The construction steps of the steel cabin include earthwork excavation, foundation channel inspection, construction layout, steel bar processing, steel bar connection, formwork engineering, concrete engineering, and masonry engineering. Here is a detailed introduction:

1. Earthwork excavation

Mechanical excavation is used for earthwork excavation, with a height of 200mm above the design elevation, and manual trimming and bottom collection are employed. After excavating to the design elevation, the foundation pit should be drilled. If soft soil layer is found, it should be cleaned up to obtain a good soil layer. The over excavated part should be compacted layer by layer to the design elevation. Lime 28 soil.

2. Base inspection groove

After excavation to the design elevation, the construction unit, design unit, and supervision unit need to review and accept it. After multiple parties sign and agree, the concrete cushion layer should be poured immediately.

3. Construction arrangement

The base of the booth is built in two steps, one step is to build the base, and the other step is to build the ground beam. After excavating the foundation pit that does not meet the bearing capacity requirements, it should be compacted and replaced with crushed stone powder. The replacement depth is 600mm, the replacement width is+200mm on each side, and the standard bearing capacity is that the alkali after replacement treatment should reach 180KPA.

4. Reinforcement processing

1) Before use, steel bars must be observed and sampled on site, and sent to the testing center for inspection before they can be used.

2) Equipped with two steel bar processing machines for steel bar processing.

3) Before cutting steel bars, a batch list of steel bars should be strictly prepared according to the design drawings and construction specifications, and submitted to the project department for review. When the steel bar is a blank, the loss length of the steel bar during the welding process must be considered.

4) Steel bars are concentrated on site, mainly processed and formed on site, and are classified and stacked according to their models. The stirrups are neatly stacked according to their specifications and sizes.

5. Steel bar connection

1) The vertical connection of truss columns, truss beams, and foundation steel bars adopts electric slag pressure welding, and the horizontal connection adopts lap joint connection. However, the position of the steel bar joints must comply with the construction specifications.

2) When using electric slag pressure welding, the welding joints arranged in the same component should be staggered, and there should not be two joint bars for the same steel bar from the center of any joint to a section with a length of 35 times the diameter of the steel bar. Not less than 500 millimeters; The cross-sectional area of the tensile steel bars in the joint should not exceed 50% of the total area, and the compression zone is not limited. The same steel bar cannot have two joints on the same section. The distance between the vertical steel bar joint and the floor slab must meet the design requirements.

6. Template Engineering

Template engineering is an important component of concrete structure engineering. The formwork and its support must have strength, stiffness, and stability, and be able to reliably withstand the self weight and lateral pressure of steel bars and concrete, as well as construction loads, to ensure the correctness of structural engineering and geometric shapes. The mutual dimensions and positions of components. Therefore, the construction of formwork engineering is very important and the key to construction.

7. Concrete engineering

No construction joints are left in the foundation, and continuous pouring is completed in one go; Before pouring concrete into the beam and upper structure, the contact surface must be scraped flat. After wetting, the bottom must be filled with 50-100mm thick cement mortar in the same proportion as the original concrete. The thickness of each pouring should be controlled at 1.25 times the length of the vibrating rod's active part, usually around 500 millimeters. The lower layer of concrete must be poured before the initial setting of the upper layer of concrete, and the vibration rod must be placed about 50mm into the lower layer to ensure good concrete joints.

Construction joint treatment: After the concrete reaches its strength, it is manually chiseled into a star shaped pattern, moistened with water, and spread with the same mixed mortar to a thickness of 20-50MM.

8. Masonry engineering

The masonry works of this project include standard brick masonry and aerated concrete blocks.

After removing the main template, place it into the masonry structure.

Install a centralized mortar mixing plant on site and transport it to the site by dump truck.