The cable trench cover is actually the cover that covers the cable slot. What is the material of the cable trench cover ? What material is the cable trench used for safety and cheap? This problem is a problem for many companies considering construction. Because the cable trench cover is very important for safety, choosing a safe and cheap cable trench cover is very important for the construction company. Of course, we must also do a good job in environmental protection measures and do not let our development become a backward environment. Here, I will give you a brief introduction on the relevant knowledge of cable trench cover material . What are the cable trench cover materials? First, the cable trench cover material is many: steel fiber concrete, composite resin, recycled resin, polymer matrix composites. 1. Steel fiber concrete: Steel fiber is relatively heavy and it is inconvenient to construct or overhaul, but the price is the cheapest. 2. Recycled Resins and Polymer Composites: The temperature resistance is poor, the winter is brittle, the summer is easy to expand, the application effect is poor, the service life is short, and the price is higher than that of steel fiber reinforced concrete. 3. Composite resin material: It is also commonly referred to as BMC: mainly unsaturated resin, glass fiber chopped, filament, plus some fillers, with reinforced steel skeleton, stable product performance, high temperature resistance, acid and alkali resistance, pressure resistance, and resistance Bending, impact resistance, flame retardancy, and price are relatively higher than those of steel fiber reinforced concrete and recycled resin and polymer matrix composites, but they are cost-effective in terms of service life and product performance. Second, according to different materials are divided into: ordinary cement cable trench cover, composite cable trench cover, fiberglass cable trench cover The wide use of price comparison is that the composite cable trench cover is based on cement, supplemented by the application of fine orthopedics, glass fiber, ore, modifiers to solve some of the application problems of cement products. It has light weight, high strength, and use. Long-term, easy operation and construction. The material is certified by the Ministry of Railways Science and Technology Division and is recommended for use in the construction of railway subordinates. After years of accumulation, the subsidiary construction made with this material has been successfully used in key projects such as passenger dedicated lines and urban transportation. According to the use characteristics of cable trench cover products, the use of new high-end composite materials is widely promoted in the world, and the production of reinforced thermoset composite cable trench cover plates completely overcomes many defects of other cover plates. The products can be applied to different areas, different conditions, different development needs, have anti-corrosion properties and good flame-retardant properties, high strength, easy installation and other advantages. As an auxiliary facility for urban cable trenches, cable trench cover materials have long been made of cast iron and cement. Affect the use of safety, and the service life is shorter. Range of use Construction and installation of concrete cover for trenches such as cable trenches in substation projects Process flow Construction preparation - angle frame production - galvanized steel frame - steel production and installation - concrete pouring - maintenance - cover installation - quality assessment Process flow description and main quality control points: Preparation for construction (1) Material preparation: sand and stone should have retest report, cement should have factory certificate and retest report; steel should be inspected for appearance and data (quality certificate), and pass the sample retest; qualified angle steel should have Certificate, appearance inspection should be performed, there is no deformation warping, specifications, model, wall thickness should meet the design requirements. Electrode welding should have a certificate, welders should have a job card. (2) Preparation of prefabricated site: The prefabricated site shall be set in the substation area without affecting the construction site, and the size of the site shall be determined according to the prefabricated quantity and the use time. The surface of the site should be calendered. After calendering, the surface should be flat, smooth, and solid (cable trench cover production site) (3) Technical preparation: 1) Drawing inspection: The drawing inspection work shall be done in strict accordance with the requirements of the “Guidelines for the Construction Technology Management of Electric Power Construction Projects†(hereinafter referred to as “Guidelinesâ€) of the State Grid Corporation of China. 2) Technical disclosure: According to the guidelines, each sub-project must be graded to provide construction technology. The contents of technical disclosure should be substantial, targeted and instructive. All personnel participating in the construction must participate in the submission and signature to form a written record. Manufacture of angle iron frame According to the size of the frame staking, the angle iron line cutting is performed by a special person. The angle iron is cut at 45 degrees and the angle iron frame is welded at 45 degrees. Angle iron frame welding can not have burned, undercut, slag inclusions and other phenomena. When welding, in order to ensure that the corner iron frame has the same size and does not deform, a flat steel plate can be set at the bottom of the frame, and the steel wire is stretched around the steel plate. The angle iron frame model is welded around the angle steel, and the angle iron is welded into the model during welding. In order to ensure that the concrete in the frame is firmly bonded to the galvanized frame, a number of threaded rebars can be welded inside the frame. After the frame is welded, it is sent to the galvanizing plant for galvanizing. After the galvanizing, the frame is easily deformed. Before the pouring, the frame should be corrected so that the diagonal line, flatness, and frame size meet the requirements. Steel production and installation According to the requirements of the drawings, the production of steel bars shall be carried out. Grade I steel shall be used as hooks, all steel bars shall be tied with lead wire, and steel bars left from the grid steel bar and angle steel frame shall be bundled. Concrete pouring: The angle steel frame is horizontally placed on the prefabricated site, and 3mm thick rubber skin is laid at the bottom of the frame to ensure that the bottom of the formed cover plate does not leak the slurry, and the bottom surface is smooth and smooth, and the bottom concrete is not out of the angle steel frame. In order to ensure the consistency of the color of the concrete cover surface, the concrete raw materials shall be entered as soon as possible and stacked separately. The concrete raw materials shall be measured by a special person and shall be evenly mixed. The angle template is covered with a layer of concrete, vibrated and compacted using a flat plate vibrator (small flat plate), reinforced mesh is placed in the formwork, concrete is added to the angle cover, and the plate vibrator is used again to vibrate and compact until the surface emerges. Puree. Before the final setting of the concrete, no less than 3 passes of calendering is performed. After the calendering, there is no smear on the surface, and pits and trachoma are strictly prohibited. After pouring, clear the concrete and mortar around the border. Conservation: At room temperature, 12h after the completion of placing the concrete cover, the surface covered with film, watering conservation of not less than 7d. Cover plate installation: When transporting, the force direction of the cover plate should be taken into consideration. The cover plate is subjected to force in the opposite direction, which may cause the cover plate to break. Place the cover plate on the cable trench, and use the theodolite to fix the point at every 20 meters. The pull wire adjusts the straightness and flatness of the cover plate. A 3mm thick rubber pad is placed on the bottom of the cover plate to adjust the stability and surface flatness of the cover plate. Quality acceptance: The quality inspection and assessment shall be carried out in accordance with Article 10.4 of the "Electrification Construction Quality Acceptance and Evaluation Procedures Part 1: Civil Works" DL/T5210.1-2005. The main quality standards are: â—† Channel cover steel frame: length deviation ± 3mm; width deviation ± 3mm; diagonal line difference ≤ 3mm. â—† Channel cover: length deviation ± 5mm; width deviation ± 5mm; thickness deviation ± 3mm; diagonal deviation ≤ 5mm; surface roughness deviation ≤ 5mm. Editing summary: In fact, when selecting the cable trench cover, we must first look at where the construction site is. If it is not on the public road or just on the green belt, we can use ordinary cement cable trench cover. If the traffic is more crowded on the road, then use composite cable trench cover plate, because the composite cable trench cover plate is of better quality, can bear 3 tons and not bad, ordinary cars pass by, even trucks Passing through will have no effect. The purpose of using the cable slot is to protect the cable, but the main thing is to protect people's personal safety. 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