Description
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brief introduction
Steel wire rope guardrail is composed of columns, brackets, cables, clamps, anchors, etc. It is a cost-effective protective guardrail that can withstand impacts from small vehicles at a speed of 100 kilometers per hour and large vehicles at a speed of 60 kilometers per hour< br />
Suitable for protective belts on both sides of highways, railways, and bridges; Security protection at airports, ports, and docks; Road safety protection for highways, mountains, and tourist attractions< br />
& nbsp; Cable guardrail is the main representative form of flexible guardrail. It is a structure composed of several cables that apply initial tension and are fixed to the column. It mainly relies on the tensile stress of the cables to resist vehicle collisions and absorb collision energy. Cable guardrails are flexible structures, and the cables work within their elastic range during vehicle collisions, making them reusable and easy to repair. The spacing between columns is relatively flexible and less affected by uneven settlement. The use of cable guardrails on scenic roads is more aesthetically pleasing. In snow covered areas, cable fences pose slightly fewer obstacles to snow sweeping. However, the construction of the horizontal cable railing is complex, and repairing damaged end columns is difficult, making it unsuitable for use in small radius curved road sections; At the same time, its visual guidance is poor, and it is uneconomical to install it for a short period of time< br />
Specifications:
Main application: Steel wire rope GB 8918-2006 & nbsp;1.2mm～60.00mm
General purpose steel wire rope GB/T20118-2006& nbsp;1.2mm～60.00mm
Coarse diameter steel wire rope GB/T 20067-2006 60.00mm～120.00mm
Multi layer steel wire rope GB 8918-2006 & nbsp;GB/T 20118-2006 12.00mm～60.00mm
Four strand fan-shaped steel wire rope GB 8918-2006 & nbsp;GB/T 20118-2006 12.00mm～50.00mm
Triangular steel wire rope GB 8918-2006 & nbsp;GB/T 20118-2006 13.00mm～60.00mm
Elliptical stranded steel wire rope GB 8918-2006 & nbsp;GB/T 20118-2006 40.00mm～60.00mm
Sealed steel wire rope GB/T 352-2002 16.00mm～75.00mm
Flat steel wire rope for balance GB/T 20119-200 6 58× 13mm～216× 34mm
Steel Wire Rope for Petroleum Use ANSI/API; Spec 9A-2004 SY517-92 13.00mm～64.00mm
Surface contact (compacted strand) steel wire rope GB/T 16269-1996 & nbsp;Q/HLS018-2006 16.00mm～60.00mm
Galvanized steel wire rope ASTM for highway guardrails; A 741-1998 19.00mm～25.00mm
Steel wire rope for electric shovel GB 8918-2006 & nbsp;GB/T 20118-2006 36.00mm～65.00mm
Hot dip galvanized round stranded steel wire rope SC for fisheries; 143-86 & nbsp; 12.5mm～26.00mm
Coated steel wire rope GB 8918-2006 & nbsp;GB/T 20118-2006 12.00mm～70.00mm
1. End pillar. The end column of the roadside cable guardrail is the main structure that bears the tension force of the cable and the collision force of the out of control vehicle. It consists of a triangular bracket, a bottom plate, and a concrete foundation< br />
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2. The end structure can be divided into two types: embedded and assembled. The buried end structure is integrated with the concrete foundation, and the burial depth of the end columns varies from 400-500nma according to different categories. The diagonal column of the triangular bracket forms a 45 degree angle with the ground; Welding a steel plate at the bottom of the corner can not only form a stable framework for the triangular bracket, but also greatly increase the bonding force with the foundation concrete through the steel plate at the bottom, making it easy to control the elevation position through the steel plate. The prefabricated end structure is connected to the concrete foundation through embedded parts, and the embedded parts of the end structure vary depending on the structure and type< br />
3. Use 6 A-grade triangular brackets with a length of 600nm and a diameter of 8Pre embedded anchor bolts, 6 anchor bolts are welded to steel plates and angle steels to form a frame. On the one hand, the position of the anchor bolts is located, and on the other hand, it can greatly enhance the bonding strength with the concrete< br />
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4. The end structure is installed at the starting and ending positions of the cable guardrail. In order to maintain the initial tension of the cable and simplify the tensioning equipment during installation and construction, maintain a certain level of cable levelness, prevent deflection, and facilitate maintenance, the installation length of the cable is generally set at 200-300m, which means that the length of each cable does not exceed 300m< br />
5. Middle end pillar. When the installation length of cable guardrails exceeds 200-300m, a middle end structure should be used. The middle end structure of the roadside cable guardrail is triangular. The end column is composed of a triangular bracket, a base plate, and a concrete foundation. The structure and dimensions of the end column. Cable guardrails are classified into two types: impregnated B-type (ordinary type) and impregnated A-type (reinforced type); Hot dip galvanizing; 5 cable guardrails, 6 cable guardrails, Type B (regular), hot-dip galvanized Type A (reinforced). A-class cables use 6 cables, B-class cables use 5 cables, and the initial tension of A-class and B-class cables is 201d~. The cables use a 3x7 galvanized/right-hand twisted structure with high strength and excellent corrosion resistance< br />
Construction:
End pillar. The end column of the roadside cable guardrail is the main structure that bears the tension force of the cable and the collision force of the out of control vehicle, consisting of a triangle; Bracket, base plate, and; Concrete; Basic components< br />
Other special requirements: If the customer has other special requirements, our company can customize according to the customer's requirements< br />
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characteristic
1. Good safety: Cable guardrails have good flexibility and can effectively absorb the energy of out of control vehicles, making them less prone to rebound and secondary accidents. Therefore, the vehicle damage and injury rates are lower than those of concrete guardrails and corrugated beam guardrails. At the same time, the collision breakthrough rate of cable guardrails is lower than that of waveform guardrails< br />
2. Convenient construction: The spacing between the columns of the cable guardrail is flexible, making it easy to cross obstacles and adjust pile positions during installation, which brings great convenience to construction and installation. The linear adjustment after hanging the cable is also relatively easy< br />
3. Simple maintenance: Cable guardrails rely entirely on the tensile stress of cables to resist vehicle collisions, and absorb the energy of out of control vehicles through the disassembly, deformation, displacement, and friction of columns and brackets, as well as cables. Due to the fact that cables work within their elastic range, after an accident, it is generally only necessary to replace the columns and brackets, and traffic can be quickly restored without the need to replace the cables. The cable guardrail has strong overall integrity and good anti-theft performance, which makes daily maintenance work very simple< br />
4. Obvious economic benefits: The amount of steel used for cable guardrails is about one-third of that of Japanese wave beam guardrails and two-thirds of that of European and American wave beam guardrails. The cost of the 102km cable guardrail on the Hening Highway was saved by more than 20 million yuan in 1990 compared to the original design of the Japanese waveform beam guardrail, with significant economic benefits< br />
Installation method
How should highway cable guardrails be installed? Below, skilled personnel from cable guardrail manufacturers will introduce us, hoping that our introduction can better help you. The control points, such as bends and corners, should be determined on the road section where cable guardrails are installed, and then the intervals between the control points should be measured. The orientation of the end column, center end column, and center column will be adjusted and positioned based on the measured intervals and the dispersion of control points< br />
& nbsp; In the future, when determining the orientation of columns, it is necessary to have a specific understanding of the orientation of underground pipelines and structures in order to make reasonable arrangements. Excavation should be carried out based on the final determined orientation of the foundation, reaching the standard elevation. After the foundation pit scale is inspected and qualified, the base should be paved with rubble concrete. After compaction, the foundation template is erected and the dimensions of each part are checked to be qualified before pouring cement concrete. After the concrete has completely set, remove the formwork and then backfill and compact it layer by layer, with each layer not exceeding 375pxUntil the elevation of the rules< br />
& nbsp; When the end column or center end column is set in the cement concrete of artificial structures such as bridges, retaining walls, culverts, and channels, it is necessary to support the formwork according to the requirements of the planning plan before pouring the cement concrete of the structure, equip steel bars around the holes, and pour them together with the concrete of the structure. When the concrete strength of the foundation of the end column and the center end column reaches 80% or more of the planned strength, it is allowed to install cables< br />
& nbsp; Place the cable around the end column and roll it towards the other end through the central bracket. Long distance dragging of cables on the road surface should be prevented to prevent scratching of the galvanized layer& nbsp; Starting from the end column at one end, first adjust the cable end anchorage of the end column, loosen one end of the cable, fix it with a wedge or inject alloy to anchor the cable. Install the tension rod adjustment bolt again and attach the cable end anchor to the end column< br />
& nbsp; Under temporary tension, block the remaining cables according to the size of the cable end anchorage& nbsp; The cross-section of the cable blockage should be straight and neat, without looseness. If necessary, iron wire should be used to tie it before blocking. The cutting of the cable should be done with a high-speed toothless saw to prevent annealing at the end of the steel cable< br />
& nbsp; After the cable is blocked, it should be inserted into the anchor head at the end of the cable. When using wedges for fixation, the cable should be separated by strands. When using cast alloy, it should be separated by single wires and the steel wire should be straightened. Then, wedges or cast alloy should be inserted for anchoring, and connected to the tension rod adjustment bolt, and installed on the end column. After the cable end anchor device is installed on the end column, the temporary tension force can be removed. The cable should be erected from top to bottom until it is fully erected. Finally, make another adjustment to all the tension rod bolts< br />
& nbsp; After the cable adjustment is completed, the cable clamp bolts on each center column bracket should be tightened. Professional supply of construction skills and teams for slope protection nets, automatic protection nets, forced protection nets, highway cable guardrails, slope engineering, and embankment engineering.
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