1. The general urban
street lamp monitoring poles are manufactured in accordance with the height of 6 meters and the cross arm of 1 meter. The community monitoring poles are customarily manufactured with a height of 3-4 meters and an arm length of 0.8 meters.
1. In the absence of special conditions, the embedded concrete of all monitoring poles is C25 concrete, and the steel bars are in compliance with national standards and wind requirements. The cement during this period is 425 general Portland cement. The proportion of concrete and the small amount of cement should conform to the rules of GBJ204-83; the thread wrapping above the flange of the embedded part anchor bolt is excellent to prevent damage to the thread. Correctly place the monitoring pole embedded parts according to the embedded parts equipment drawing to ensure the extension of the support arm rod.
2. The flatness of the concrete casting surface at the bottom of the pole is less than 5mm/m. Try to keep the pole embedded part level. The flange of the embedded part is 20~30 mm lower than the surrounding ground, and the reinforcing rib is covered with C25 fine stone concrete to prevent water accumulation.
1. Street lamp monitoring poles must have lightning rods and outstanding grounding and lead into the ground (advocate to conduct electricity without using the pole body), and its grounding resistance is less than 4 ohms; the direction and the roadway are straight (or as required by the engineer) anchor bolts as the main reinforcement;
1. It is necessary to set a hand-hole well near the pole, beside the control box, at the corner of the cable, when the cable tube is in a straight line, or when the two cable tubes are not in the same plane and more than 100 mm apart.
2. The inner circumference of the hand-hole well is required to be 500 (length) × 500 (width) × 600 (depth) MM, and gravel paving is used for water seepage; the walls of the hand-hole well must be smeared with cement mortar.
3. The control box is equipped by the equipment manufacturer according to the required capacity. The outer shell is made of high-quality cold-rolled steel plate with a wall thickness of not less than 1.2mm, and the exterior is sprayed with outdoor plastic powder, and it is waterproof, anti-theft and heat dissipation.
4. Structural steel shall not affect the materials and mechanical properties of defects such as cracks, delamination, heavy skin, slag inclusion, etc. The depth of pitting or scratches shall not be greater than 1/2 of the thickness of the steel, and shall not be greater than 0.5mm.
5. Planning basis: planning wind load: 23m/s2, fatigue life: 30 years, according to the national standard version "carbon structural steel", "electrical equipment engineering cable line construction and inspection standards", "steel structure engineering construction And inspection standards", "reinforced concrete engineering construction inspection standards" and other relevant standards for construction.
1. It conforms to the rules of the current national standards and has qualification certificates. E43 type welding rod is selected for carbon steel, and the quality of the welding rod should conform to the rules of the national standard. Never use welding rods with falling coatings, rusty or damp cores, and rusty welding wires. The welding scale meets the planning requirements, and the welding wave on the surface of the weld metal is uniform, and no cracks, slag inclusions, weld bumps, burn-through, infusion, arc craters and needle-like pores that affect the strength are not allowed, and there are no defects such as wrinkles and suspension. The bite depth in the weld area is not allowed to exceed 0.5mm, and the cumulative total length must not exceed 10% of the total length of the weld. The width of the weld is less than 20mm, the remaining height of the fillet is 1.5mm~2.5mm, the fillet height of the fillet weld should be 6mm~8mm, and the size of the fillet is not allowed to be smaller than the planned size.
2. Hot-dip galvanizing is used for the anti-corrosion treatment. Before the anti-corrosion treatment, the steel components should be effectively derusted. The thickness of the hot-dip galvanizing should not be less than 85um, and the zinc layer should be uniform. When copper sulfate solution is used for the etching test, more than 4 times No iron is exposed. The zinc layer should be firmly combined with the metal body. After the hammering test, the zinc layer will not peel off and not bulge. Passivation treatment should be carried out after zinc immersion, and the 48h salt spray test is qualified. For every 100 m pole, the straight line measuring the axis, the full length of the pole and the steel cage of the base should be temporarily fixed to ensure that the plane of the base and top of the steel bar is level, that is, use a level ruler to measure in both directions of the base and top. The air bubbles must be centered; the concrete pouring and ramming of the embedded parts of the monitoring pole must be compacted to prevent the concrete from hollowing;
2. During construction, the pre-embedded pipe mouth should be sealed with plastic paper or other materials in advance to prevent the concrete from leaking into the pre-embedded pipe when the concrete is poured, causing the pre-embedded pipe to be blocked; after the foundation is poured, the root bottom must be high 5mm~10mm above the ground level; the concrete needs to be maintained for a period of time to ensure that the concrete can reach a certain equipment strength.
3. Each metal pole must be grounded, and its grounding resistance is less than 4 ohms; the detailed data of the foundation of each pole shall be subject to on-site construction requirements.
1. The road monitoring poles generally only require the use of small standard manholes. In order to facilitate equipment and equipment, the manholes should be set near the monitoring poles; when the local water level is not high, only gravel (sand) cushions are laid at the bottom of the manholes to facilitate rainy days in the manholes. The accumulated water seeps into the ground, but there must be a concrete bottom layer under the well wall, and the well wall powder cement mortar; when the local water level is high, add a layer of 10CM concrete cushion to the bottom of the well, and the well wall and bottom should be painted and waterproof Mortar;
2. The net size is 500×500×600 (length×width×height), using Mu10 brick M5 cement mortar 240 thick masonry, cover plate with Φ8@150 two-way equipment, C20 concrete prefabricated plate thickness is 60 thickness, the elevation is the same as the sidewalk surface or The beautification belt, the surface of the board must be smooth, with lifting holes, and the cover shall be manufactured according to the national standard. The detailed civil construction data of each well shall be subject to on-site construction requirements.
The top spot with a high-quality main pole. Generally better
street lamp monitoring poles are main poles made of high-quality seamless steel pipes. Such a main rod can have a stronger ability to resist pressure. Therefore, when you buy the monitor pole, you must check the manufacturing information of the main pole of the monitor pole.
Second, it has a thicker wall. Generally, better monitoring rods have a thicker tube wall. Because of the thicker tube wall, the monitoring rod has better wind resistance and pressure bearing capabilities. So everyone must understand the thickness of the pipe wall when buying the monitor rod.
Third, it has the characteristics of convenient equipment. Generally better monitoring rods have the characteristics of sensitive equipment. As long as the operation is simpler than the general monitoring rod, it will have a better user experience, and then have a stronger competitiveness.
Choose rods reasonably to prevent the camera from being blocked in the selection of social security street lamp monitoring rods. According to different camera types, try to choose the height of the manuscript that meets the arrival monitoring function: height between 3.5-5.5 meters can be used as the selected height .
(1) Selection of the height of the gun-type camera pole: For the selection of the pole of the gun-type camera, try to choose a pole with a relatively low height, and generally choose a pole with a height of 3.5-4.5 meters.
(2) Selection of the height of the dome camera rod: the dome camera can rotate 360 degrees and the focal length is adjustable. All the rods selected for the dome camera should be as high as possible. Generally, we choose a rod between 4.5-5.5 meters Piece type. For the above-mentioned rods of various heights, a reasonable crossarm length should be selected according to the distance between the pole position and the monitoring policy direction and the viewing direction to prevent the crossarm from being too short to capture suitable monitoring content. In a sheltered environment, it is advisable to choose 1 meter or a cross arm 2 meters to reduce the shelter.
(2) In principle, the azimuth interval of the poles should not be less than 5 meters in the short distance of the monitoring target area, and the far distance should not be greater than 50 meters, so as to ensure that the monitoring screen can include more valuable information;
(3) Priority should be given to the use of light sources in places where there are light sources nearby. But pay attention to the orientation of the camera's equipment should be in the direction of light;
① Open exposure compensation (the effect is not obvious); ② Use fill light; ③ Set the camera in the underground tunnel outside the entrance; ④ Set it in the channel.
(5) The position of the pole should try to avoid beautifying trees or other obstructing objects. If necessary equipment, consider avoiding the obstruction of trees or other obstructions, and leave space for the future growth of trees;
(6) Pay attention to the survey, try to get electricity from traffic police signals, street light distribution boxes, governments, larger enterprises, and institutions (such as government departments, public transport, water supply groups, hospitals, etc.) to facilitate harmony and progress The stability of electricity. Try to prevent small business users from getting electricity, especially for civilian use.
(7) The camera is on the side of the road. Pay attention to taking pictures of pedestrians in reverse, and the facial features of pedestrians on non-motorized vehicles. (8) The camera of the equipment at the bus station should be placed in the direction of the rear of the vehicle as far as possible, avoiding the headlights of the vehicle, so as to capture the people on the bus.
It is worth noting that, in the equipment standards for monitoring poles, it is required that the street light monitoring poles must have lightning rods and outstanding grounding maintenance, and can be led into the ground (it is recommended to conduct electricity without using poles), so to ensure the long-term normal operation of the front-end equipment , Surge maintainers matching various signal equipment are indispensable, and standard grounding is required.
The cameras are all mounted on a pole. If the soil condition on site is good (with less non-conductive materials such as rocks and sand), the pole can be directly grounded. The size of the pit is 2000×1000×600mm, and the bottom is fine or moist. The share of soil reached 85%. Fill it with fine soil, then bury a 1500mm×12mm steel bar straight, pour concrete, and when it reaches the ground, insert a fixing bolt (fixed according to the size of the pole base) with a bolt in between It can be welded with steel bars and used as a grounding electrode. After the concrete is completely stabilized, backfill with fine soil around it and ensure certain wetting. Finally, the ground wire of the camera and the lightning protection device can be directly welded to the ground electrode on the pole. Do a good job of anti-rust treatment, and mark the nameplate.
If the soil condition on the site is bad (there are more non-conductive materials such as rock and sand), you should use the data of adding the touch area of the grounding body. Use drag reducer, flat steel and angle steel, etc. Detailed measures: the previous operation is as above. Before pouring the concrete base, a chemical resistance reducing agent with a thickness of 150mm should be laid along the wall of the pit, with a 2500×50×50×3mm angle steel embedded in it, and 40×4 (iron) The flat steel is pulled down along the pole, the ground wire of the lightning arrester and the camera is properly welded to the flat steel, and the flat steel is welded to the underground angle steel (iron). The ground resistance test is less than 10 ohms according to the national standard.
The azimuth interval of the poles should not be less than 5 meters in the short distance of the monitoring target area, and the far distance should not be greater than 50 meters, so as to ensure that the monitoring screen can include more valuable information.
In places where there are light sources nearby, priority is given to using light sources. But pay attention to the orientation of the camera device should be in the light direction.
Try to prevent the equipment from being in a high-contrast area. If necessary, consider: ① Open exposure compensation (the effect is not obvious); ② Use fill light; ③ Set the underground camera outside the entrance; ④ Set it in the channel a little.
The pole position should try to avoid beautifying trees or other obstructing objects. If necessary, consider avoiding trees or other obstructions, and leave room for the future growth of trees.
Pay attention to the survey, try to get electricity from traffic police signals, street light distribution boxes, governments, larger enterprises, institutions (such as government departments, public transport, water supply groups, hospitals, etc.) to facilitate harmony and improve electricity use. Stability. Try to prevent small business users from getting electricity, especially for civilian use.
The camera is on the side of the road. Pay attention to reverse photographs of pedestrians, and the facial features of pedestrians on non-motorized vehicles.
The camera of the equipment at the bus station should be placed as far as possible in the direction of the rear of the vehicle, avoiding the headlights of the vehicle, so as to capture the people on the bus.
A reasonable length of the cross arm should be selected according to the distance between the pole position and the direction of the monitoring policy and the viewing direction to prevent the cross arm from being too short to capture suitable monitoring content.
