Whether it is the handling of emergencies, the capture of criminals, or the daily scheduling of personnel inspections, or the cooperation and external communication of government departments, it is a “big exam†for safe cities. Fortunately, it is not difficult to pass high scores through the “big examâ€. With smart, digital platforms that can be simplified, we have reason to believe that Safe City solutions will reach more cities in the future and benefit thousands of households.
Safe city monitoring pole common requirements:
1. The general urban road monitoring poles are made according to a height of 6 meters and 1 meter.
2. The monitoring rod must have a good grounding. It is better to add the lead wire to the underground (it is recommended that the conductive rod does not go). Its grounding resistance is less than 4 Euro.
3, embedded parts anchor bolts above the flange plate is well wrapped to prevent damage to the thread. According to the embedded parts installation drawing, the monitoring pole embedded part should be correctly placed to ensure that the extension direction of the boom arm is perpendicular to the traffic lane (or as required by the engineer) and the anchor bolt is used as the main reinforcement;
4. The level of the concrete pouring surface based on the monitoring pole shall be less than 5mm/m to maintain the level of the embedded part of the pole. The flange of the embedded part is 20~30 mm below the surrounding ground, and then the ribs are covered with C25 fine stone to prevent water accumulation;
5. Hand-hole wells must be set up beside the bar, next to the control box, at cable bends, when the straight length of the cable tube exceeds 50 meters, or when the cable tubes at both ends are not more than 100 mm apart in the same plane. Hand-hole wells require 500 (long) × 500 (width) × 600 (deep) MM. The gravel layer is used for water seepage; cement mortar must be wiped on the walls of the hand well.
6. 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 sheet whose wall thickness is not less than 1.2mm, and the exterior plastic powder is sprayed to prevent water and theft.
7. The depth of cracks, delaminations, heavy skins, slag inclusions, etc., of the structural steels that must not affect the material and mechanical properties shall not be greater than 1/2 of the negative thickness tolerance of the steel material, and shall not be greater than 0.5 mm.
Requirements for monitoring pole manufacturers:
1. The steel pipe material complies with the current national standards. The welding size meets the design requirements and the welding wave on the weld metal surface is even. It must not affect the strength of cracks, slag inclusions, welding defects, burn-through, unmelted, craters and needle-like pores, and there are no defects such as wrinkles and interruptions.
2. Anti-corrosion treatment uses hot-dip galvanized steel. Before the antiseptic treatment, the steel member shall be effectively rust-removed. The thickness of hot dip galvanized shall not be less than 85um, and the zinc layer shall be uniform. When the copper sulphate solution is used for etching test, more than 4 times Without exposed iron, the zinc layer should be firmly bonded to the metal body. After a hammer test, the zinc layer does not peel off and does not protrude. After the zinc dipping, passivation treatment shall be carried out and the salt spray test shall be passed for 48 hours. For every 100 m rod, the linearity error measured on its axis does not exceed 0.5 ‰, and the linear full-length error of the rod does not exceed 1 ‰.
Technical requirements for the construction of embedded parts for monitoring poles:
1. The basic reinforcement cage should be temporarily fixed, and at the same time ensure that the reinforcing steel pet's basic roof plane is horizontal, that is, use the level ruler to measure in the two vertical directions of the foundation roof, and observe that the bubbles must be centered; the monitoring base embedded part must be concrete poured. Solid, no concrete hollowing;
2. Pre-embedded nozzles shall be sealed with plastic paper or other materials before construction to prevent the concrete from leaking into the buried pipe when the concrete is poured, resulting in blockage of the buried pipe; after the foundation is poured, the foundation surface must be higher than Ground level 5MM ~ 10MM; concrete must be maintained for a period of time to ensure that the concrete can reach a certain degree of installation strength.
3. Each metal pole must be grounded, and its grounding resistance is less than 4 ohms. The specific data of each pole shall be subject to on-site construction requirements.
The construction requirements for the monitoring pole junctions are as follows:
1. Road monitoring poles generally require the use of small-sized wells. For the convenience of equipment installation, wells should be installed near the monitoring poles. When the groundwater level is not high, only the gravel (sand) cushions at the bottom of the wells can be used for the rainy days. The stagnant water seeps into the ground, but below the borehole wall there must be a concrete foundation cushion and silo powder cement mortar. When the groundwater level is high, a 10CM concrete cushion is added to the bottom of the well and the wellbore and bottom of the shaft are painted and waterproof. Mortar
2, net size 500 × 500 × 600 (length × width × height), the use of Mu10 brick M5 cement mortar 240 thick masonry, cover with Φ8 @ 150 bidirectional configuration C20 ç ¼ prefabricated board thickness of 60 thick, elevation with the sidewalk or In the green belt, the surface of the board must be smooth and the hole should be raised. The cover plate should be made according to the national standard. The concrete construction data of each well is subject to the on-site construction requirements.
3. Each metal pole must be grounded, and its grounding resistance is less than 4 ohms. The specific data of each pole shall be subject to on-site construction requirements.
4. The concrete foundation should be poured with concrete and reinforced cages. Before making the cement foundation, four 60*60*1500 angle steel grounding levels should be laid around the foundation. After connecting 4 angle steels with 30*4 flat iron, the copper busbars connecting φ16 should be connected. One of the three φ32 tubes is connected to the outlet hole at the center of the base to facilitate the connection of the grounding wire to the upper chassis of the pole. Copper ends of the φ16 copper busbar are required to be copper noses. Pre-embedded pipelines, pipeline diameter of not less than 32mm, turning radius of not less than 200mm, used to run between wells and poles.
5. There should be a threaded pipe between the foundation and the manhole, and place the wire.
Installation requirements and recommendations for monitoring poles:
First, the installation method: The basic screw and the camera rod are connected and fixed. After the installation is completed, the base screw can be covered with cement to prevent the screw from being damaged.
Second, the installation requirements: 1, the installation is solid 2, the camera rod center line should be perpendicular to the horizontal plane 3, the camera rod into a 180o angle centerline of the waist hole should be parallel to the road.
3. The cable and control box in the pole can be put in and installed before the pole. The cable must be laid to prevent damage to the cable and the control box should be waterproof.
4. Installation of camera and auxiliary light source: Installation method: Fix the pan/tilt components on the camera pole through the hoop. Installation requirements: 1, the installation is solid, the cable hole should be facing the camera rod waist hole. 3, the intersection of construction and warning signs should be placed, there must be someone responsible for safety, security cameras and auxiliary light when you use the climbing car, stand up when you pay attention to the safety of pedestrians.
Fifth, grounding body installation: 1, grounding body welding should adopt lap welding. 2 There should be no pipes or cables passing below the grounding body installation point. 3. After the grounding body is installed, use a grounding rocker to measure the grounding resistance. The grounding resistance should be less than 4Ω. Note that the resistance should not be measured immediately after the rain.
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