Why do you use cable ducts?
This device is used for laying fiber-optic communication, telephone and electric wires. The cable communication system is laid underground and protects the wires from changes in temperature, moisture and electromagnetic influences. In addition, the underground gasket provides access at any time to inspect, replace and repair the network, and install new lines without compromising the integrity of the pavement and excavation.
Cable laying in cable ducts allows creating a branched communication network irrespective of changes in terrain and ground structures - roads, houses, airports and other objects. Wires can also be laid vertically in the apartment building and in case of emergency under water.
How to start the installation of cable ducts?
The cable duct starts with calculations and preparatory work. First of all, it is necessary to break the track so that the volume of construction work is the least, and the cables are as much protected from corrosion, lightning strikes and other dangerous influences. It is desirable that the track was as straightforward as possible.
When planning a route, it is necessary to avoid underground structures, landfills, sites with calcareous soils and sewage. The construction of cable ducts includes the placement of cable pads, grouping of construction lengths, trenching, laying underground sections in pipes, crossing over roads, installing bollards, laying and installing a network.
Both single and interlocked pipes for cable ducts are used. Ceramic, asbestos cement, concrete, polyethylene or plastic pipes are used. After every 15-20 km of the route cable grounds are set up, which should be smooth and dry during periods of excessive moisture - during floods, autumn rains or melting snow.
The grouping of construction lengths is performed because the transmission quality depends on the electrical uniformity of the circuit. For this purpose, the wires are grouped according to the lengths, design features, wave resistance, working capacitance values and other parameters.
Ways of cable ducting
Wells of cable ducting are typical and special, made of brick or reinforced concrete, according to the configuration they are divided into angular, through, branching and station. For pedestrian areas and the roadway, the maximum load is calculated, and the protective plates are mounted. The shape of the well can be any - from rectangular to ellipsoidal.
If the network can not be laid below the freezing level of the ground, use a heating cable for sewerage. This is a self-regulating electrical heating tape protecting the network from freezing. It is cut into pieces up to 80 m, connected to a normal shield or socket and laid outside the pipe.
Cable ducting design is a complex technical task that can only be carried out by specialized companies. Stages of design: obtaining technical specifications, development and approval of the project, obtaining construction permits and technical works.
Availability of qualified personnel and specialized equipment, including cable laying, is mandatory for such companies. As a rule, the same company is engaged in both construction and maintenance of networks and their further reconstruction and development.
