When we walk on the road at night, we will find that on both sides of the road or near some public places, there will be a lot of colorful lights. The meaning of these lights is to illuminate on the one hand, and another important aspect is to beautify The city, which is what we call landscape lighting, can make the city have a good-looking landscape at night. And if you want to achieve such an effect, you must pay attention to some matters when carrying out the landscape lighting project. Before introducing the precautions, the editor would like to introduce the construction process of the landscape lighting project to you, which is still a relatively complex project. , interested friends can take a look and find out.

The construction process of landscape lighting project:

1. Trench excavation

a. The width of the excavation trench is 400mm and the depth is greater than 450mm.

b. Use a ruler to draw the control line during excavation, determine the direction of the trench, and do not damage the landscape and underground facilities.

c. When backfilling, compact the soil and restore it with concrete mortar through the grooves of the hard pavement.

2. Cable laying

a. The cable type, voltage, and specifications should conform to the design, and the insulation test should be carried out on the cable before laying, and the insulation resistance should be greater than 0.5MΩ.

b. Before laying, the length of each cable should be calculated according to the design and actual path, and each cable should be arranged reasonably to reduce the number of cable joints.

c. When laying cables in live areas, there should be reliable safety measures.

d. Power cables have spare lengths near terminals and joints.

e. The minimum bending radius of the cable should be greater than the outer diameter of the 20D cable.

f. When laying the cable, the cable should be drawn from the upper end of the plate, and the cable should not be rubbed and dragged on the bracket and the ground. No mechanical damage, such as flattening, cable twisting, sheath cracking, etc., has not been eliminated on the cable.

g. For power cables laid in parallel, the positions of the cable joints should be staggered from each other.

h. The cables should be arranged neatly and should not be crossed. They should be fixed and signs should be installed in time.

i. The cable in this project is a cable through the pipe, and the distance from the surface is not less than 40CM. It can be buried shallowly when it is introduced into the intersection of the building and the building, but protection measures should be taken, and steel pipe protection should be added when crossing the hard road.

3. Threading inside the pipe

a. The diameter of the wire is determined according to the number of wires worn, and the measured value of the insulation resistance of the wire should not be less than 0.5MΩ. The wires of different systems and different circuits are strictly prohibited to be inserted into the same protective tube, and the wires must not have joints and kinks in the protective tube.

b. The equipment grounding wire and special grounding wire must be multi-strand copper conductors.

c. When the wire is inserted into the steel pipe, a sheath should be installed at the mouth to protect the wire, and the vertical mouth of the box should be sealed after the wire is inserted.

4. Pipeline laying

a. The plastic pipes and accessories used to protect the wires must be made of flame retardant materials. The outer wall of the plastic pipes should have a continuous flame retardant mark and a manufacturer’s mark with a distance of not less than 1 meter.

b. When the pipe is connected with the pipe, the length of the jacket should be 1.2-3 times the pipe diameter, and the butt joint between the pipe and the pipe should be located in the center of the casing.

c. When the plastic pipe is laid in the upper groove of the brick wall, it should be protected by cement mortar with a strength grade of not less than M10, and the thickness of the protective layer is not less than 12mm.

5. Steel pipe laying

a. Thick-walled steel pipes should be used in wet places and wire protection pipes directly buried in the ground.

b. The steel pipe should not be flattened and cracked, there should be no iron filings and burrs in the pipe, the incision should be flat, and the nozzle should be smooth.

c. When the casing is connected, the length of the casing should be 1.5-3 times the outer diameter of the pipe, and the butt joint of the pipe and the pipe should be located in the center of the casing. When the casing is connected by welding, the welding seam should be firm and tight; When tightening the screw connection, the screw should be tightened, and in the vibration place, the tightening screw should have anti-loosening measures.

d. Galvanized steel pipes shall be connected by threaded connection or casing set screws, and shall not be connected by welding.

6. Lamp installation

a. Assemble the qualified high-quality street lamps on the ground to ensure that the various electrical appliances in the lamps are fastened and reliable. After the assembly is completed, power on and test the lighting.

b. Transport the intact lamps to the site, and prevent surface scratches or bumps during transportation.

c. The installation of the street light should be vertical, and the verticality should be adjusted with a water gauge.

d. The metal shell or base of all lamps must be connected with PE wire and grounded reliably.

7. Control cabinet installation

a. The control box should be installed firmly, and its vertical deviation should not be greater than 3mm; the installation height between its bottom edge and the ground should meet the design requirements.

b. The position of the control box should be close to the inspection port of the cable trench, and the inspection work space should be reserved and waterproof treatment should be paid attention to.

c. The incoming and outgoing lines of the control box should be neat, and the position and angle of the outgoing lines should be reasonable.

d. In the control box, the neutral line and the protective earth line (PE) should be set up respectively, and be grounded reliably.

e. Each circuit switch in the control box is clearly marked.

8. Fabrication and installation of cable terminal head and cable middle head

a. The production of the cable head should be carried out by trained personnel who are familiar with the process and strictly abide by the production process specifications.

b. When making cable terminal joints, it should be continuously operated from the beginning of stripping and cutting the cable to the completion, shortening the insulation exposure time, and the core and remaining insulation should not be damaged when stripping and cutting.

c. The cable head is sealed and insulated with self-adhesive tape and waterproof tape, and epoxy resin is also applied to strengthen the sealing and moisture-proof treatment.

d. The cables on both sides of the cable joint should be well connected and not interrupted, and the cross-section of the jumper should not be less than the cross-section of the grounding electrode.

e. The cable should be grounded reliably and soldered with tin.

9. Ground pole (grounding protection) construction

a. The grounding protection should be installed in strict accordance with the requirements of building electrical construction specifications. The working zero line and the protection zero line should be strictly separated, and must not be mixed. The PE lines of all distribution boxes should be vertically grounded. If the passing test is greater than the standard requirements, rework must be required until the standard is met.

b. The grounding electrode and grounding flat steel shall be made of hot-dip galvanized steel. The grounding device shall be buried with a depth of not less than 0.6M, and the grounding wire shall be led to the ground through 0.6M below the surface.

c. Use ∠50×50×5×2500 galvanized angle steel for the grounding electrode, with a spacing of 5M, and use -40×4 galvanized flat steel for the grounding bus bar. The welding lap length between the grounding busbars is not less than 15CM. Welds should be treated with anti-corrosion.

10. Debugging

a. Test process flow: primary and secondary circuit test of low-voltage switch box → overall debugging → operation.

b. Debugging content of low-voltage switch box: test of main circuit breaker and contactor, secondary circuit test, etc.

Matters needing attention in the construction of landscape lighting projects:

1. In the entire landscape lighting design process, designers should consider the landscape lighting environment, surrounding environment and geographical location, combine the characteristics of their own cities, highlight the structure of their own cities, do not blindly imitate other cities, do A one-of-a-kind urban lighting.

The landscape lighting is different in different regions. The design process should be integrated with the surrounding environment, outline the appearance of the city, and reflect the general shape, scale and characteristics of the city.

2. After the overall design, it is the problem of landscape lighting construction. Lighting requires lighting lamps. In the selection of materials, some lamps that save energy and reduce consumption, and have a long service life should be used to avoid excessive waste and environmental protection. Very important.

3. During the construction of landscape lighting, it is necessary to avoid noise as much as possible, and do not disturb the daily work and rest of the surrounding residents. At the same time, avoid light pollution.

4. Strengthen management, and repair some damaged places in time. Standardize management, manage with scientific methods, and use limited resources to make better landscape lighting.

The above is the introduction of the construction process of the landscape lighting project and the matters needing attention. If you have friends who do related work, you can take a good look at the precautions for construction.