How to connect the underground garage grounding?

Is this project open source? The second underground garage of Blue Lagoon Community is located in the northeast corner of the intersection of Wuyi Road and Liujiang Road in Luohe City. This project is a three-level garage, with building floors: the first underground garage. The building height is 4.000 meters; ; The total construction area * * * is 3479. 17m2. The structural form is frame-shear wall structure, and the general layout is roughly ∧.

Second, the engineering characteristics

1. This project is a garage. The installation project requires high quality, so it is necessary to ensure the safety and reliability of water, electricity and communication facilities. Otherwise, the post-repair work will be heavy and the social reputation will be bad.

2. The construction site of this project is narrow, and the noise in the construction environment is difficult to control, so the construction must be carefully organized.

3. The embedded construction of this project has a wide range of cooperation, a large amount of work and a long time.

The project is a shear wall structure, and it is difficult to embed the wall in the pipeline. Laying and embedding in the floor and wall must cooperate with the main construction of civil engineering.

Three. Main project content 1 electric lighting part

(1) This project introduces 380/220V three-phase four-wire low-voltage power supply and standby power supply from the city network. This project is a second-class high-rise building, and its fire-fighting equipment, emergency lighting and elevator are switched at the end of double power supply according to the secondary load. Others are regarded as Class III loads.

(2) Line laying: All cables (wires) are laid through pipes. The lighting branch pipe adopts flame-retardant hard plastic conduit, which is laid in the board or ceiling. The distribution line of fire-fighting electrical equipment should be protected by pipe piercing. When concealed, it should be laid in a non-combustible structure, and the thickness of its protective layer should be not less than 30 mm When exposed, it must wear a metal tube and apply a fire retardant coating.