Engineering safety inspection requirements for LED display screen ceiling project

In recent years, with the development of social economy and the improvement of scientific and technological level, led sky curtain has become a familiar word, which shows the beauty of the integration of LED display screen and architecture, and has gradually become one of the landmarks reflecting the level of regional economic development. During the use and operation of LED sky curtain project, the safety of its structure shall be tested and identified regularly. Analyze the structural safety and durability, including the appearance of the sky curtain, the relevant parameters of concrete-filled steel tubular column, the relevant parameters of pipe truss and the detection and analysis of damage; The safety evaluation is given according to the test data, and reasonable opinions are put forward, which can be used as a good reference for similar project quality inspection.

Generally, the LED sky curtain is built in the prosperous commercial center and crowded area, so all kinds of engineering quality hidden dangers will pose a major threat to the surrounding buildings and life safety. The structure of the LED sky curtain project should be tested and identified. In this paper, the structure of an actual led sky curtain project is identified and analyzed. The identification method and process can be used as a good reference for similar structural inspection.

1. Basic inspection

Check the cracks at the connection between the steel column and the ground of the LED sky curtain project. After inspection, check whether there are settlement cracks, deformation and displacement at the connection between the concrete-filled steel tubular column and the ground of the sky curtain project; The superstructure works normally, whether there is obvious inclination, displacement and cracks caused by settlement.

2. Component layout and section size inspection

The layout of components of LED sky curtain project is investigated, and 8 concrete-filled steel tubular columns and 8 pipe truss components are selected for LED sky curtain project by using steel tape, vernier caliper and ultrasonic thickness gauge. The cross-sectional dimensions of the measured components meet the design requirements.

3. Detection of bending sagittal height and verticality of concrete filled steel tubular column

The prism free total station is used to extract 8 steel column members from the LED sky curtain project, and the bending sagittal height and perpendicularity are tested respectively. The measured bending sagittal height deviation of concrete-filled steel tubular column members is 1mm ~ 5mm and the perpendicularity deviation is 0.9mm ~ 20.6mm, which are less than the limit value in the code for acceptance of construction quality of steel structures (GB50205-2001).

4. Detection of coating dry paint film thickness of pipe truss and steel column rod

Tt260 coating thickness gauge is used to sample 30 pipe truss members from LED sky curtain project to detect the thickness of dry paint film of anti-corrosion coating on the surface of pipe truss members. The thickness of dry paint film of anti-corrosion coating on the surface of components shall meet the requirements of code for acceptance of construction quality of steel structures (GB50205-2001): 150 outdoor μ m. Indoor shall be 125 μ m. The allowable deviation is - 25 μ M.

5. Weld quality inspection

The digital display ultrasonic flaw detector is used to extract 48 butt welds and related line welds from the LED sky curtain project for weld quality inspection. The measured weld quality meets the requirements of weld quality grade II.

6. Appearance quality, damage and leakage inspection

Inspect the appearance quality, damage and leakage of video display of LED sky curtain project: corrosion of connectors, wrinkling, sagging, peeling and rust return of steel members, as well as cracks and deformation.

To sum up, many factors such as construction quality, welding process, corrosion, deformation and uneven settlement of foundation have caused major potential safety hazards to the structure of LED video wall project, so it is necessary to scientifically and effectively identify and analyze the structure of LED sky curtain project; At the same time, in order to ensure the safe and effective operation of the LED sky curtain project, we must adhere to daily maintenance, supplemented by effective detection means, and timely repair the problems, so as to realize the optimal maintenance within the service cycle of the LED sky curtain project system.

The unique transparent led ceiling screen beautifies the city and creates a new advertising mode. The transparent LED display screen is transparent when it is not lit. It is integrated with the graceful buildings, blue sky and white clouds. Tourists can't feel the existence of the display screen at all. While enjoying shopping, tasting delicious food and leisurely walking, you can enjoy the sunshine in the clouds during the day, and watch the magnificent and colorful sky screen at night, so as to make your shopping trip and dating more romantic and dreamy!