Concrete supports: the design, installation, installation. Types of concrete poles

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2018-03-27 21:55:10

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Concrete pillars are load bearing element in the construction of power lines. They lay heavy loads mostly from environmental influences, so the combination of concrete and metal is justified. There are different types of pillars, each of which has its own purpose. Technology installation is complicated by the fact that even in the simplest execution of the reinforced concrete pillar is heavy and requires to install special equipment.

Reinforced concrete Design support

concrete pillar

The Foundation supports is concrete reinforced metal frame. Depending on the purpose can be used for different mortar compositions. For example, maintenance of power lines from 35 to 110 kV is made using the supports of centrifuged mixtures of concrete. The advantages of the design of reinforced concrete, is resistant to corrosion and chemicals and elements contained in the air. Such pillars and disadvantages. In the first place is a significant mass, which are complicated and work on their installation, and transportation. Also, the material has a relative sensitivity to mechanical stress. For example, when transporting poles often become corrupted – on the surface there are cracks and chips.

Snap concrete poles

installation of reinforced concrete footings

The Support of reinforced concrete can be supplied with a metal frame formed of the reinforcing steel. Thanks to her design acquires high reliability and protection from external influences. Fittings designed for installation of wires on hooks or cross-arms. In the first embodiment uses a support in which at the factory was made suitable openings for the introduction of hooks. It is important to note that the supply functions can run before it was installed reinforced concrete pillars in the work area. This feature distinguishes such structures from wood, snap-in, which can only be carried out after installation.

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Classification by installation method

design of reinforced concrete footings

There are different approaches to the installation of concrete poles. In this case we are talking about the methods of fixation in the soil – with mounting on the Foundation and direct immersion in the soil. Supports, which are fixed on the basis of the Foundation, also come in two types: escalatie and classic. The first kind-is a structure which installed on steel or concrete piles. The second option would dive into the ground, followed by pouring concrete. This reinforced bearing is also called frame or frame. It is used as structural element of foundations. Supports, which are directly fixed in the ground, usually used as a supporting structure of lighting systems, lines, wiring, etc.

Classification by purpose

installation of reinforced concrete footings

In essence, a simple and robust design has led to a wide range of applications of such elements. Today we can distinguish the following types of concrete poles based on their purposes:

  • Corner. Used on the corners in the track of overhead lines (VL). Depending on the angle of rotation can be used for this purpose and other types of supports.
  • Intermediate. Serve straight sections of the overhead lines. Such models are based on the maintenance of ropes and cables, however they cannot be used if there are additional load.
  • Anchor. Also used on straight sections of the overhead lines, but have one feature. With the help of anchor towers formed a transitional zone using natural barriers, engineering structures and other constructions.
  • End. These supports begin and end of the air line.
  • Common and special concrete footing, which is used to change the configuration of wires, and provides support on difficult sections with branches, junctions and intersections.

Features of the supports for power lines

The Support of reinforced concrete are the optimum solution to support overhead power lines. Metal and wooden counterparts are also used for this purpose, but have several serious limitations. However, supports of concrete have split loads on the networks with whom they can work. In particular, there is support for lines from 10 to 1150 kV. In such a wide range of designs with different parameters. The higher the voltage, the greater mass and length of the traverse has concrete support, is included in the network. It would seem that if the lines are at approximately equal distances from earth and the physical load on the structure are the same, what caused the need for changes in the characteristics of support? In fact, this is justified by the technological requirements, which require different standards for distances from the line to the supports and the surface of the earth depending on the voltage.

Technology installation

types of reinforced concrete footings

To work eventsproceed only after completion of site preparation and delivery of components for installation. Next is the display of materials, the analysis plan and performed the ground. Thereafter, the Assembly of the structure and its elements. The installation of reinforced concrete footings, perform special machinery: cranes-installers or STRELOVA technique. Pull-up stands can be run by tractor. Also, a pit is prepared, the diameter of which may exceed a similar indicator stand not more than 25%.

If the installation is planned portal or double-column supports then the installation is performed sequentially: first one, then the other front. This is followed by installation of cross-arms, cross Messtechnik endings of the ligaments and fixation of the lower endings. When the lifting and installation of supports of special equipment will be performed, a construction is temporarily raskrepljajut special braces, then install the bolts. To proceed to the final stage in the installation of supports and backfilling of soil after will be reconciliation, the provisions of the design.


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Alin Trodden - author of the article, editor
"Hi, I'm Alin Trodden. I write texts, read books, and look for impressions. And I'm not bad at telling you about it. I am always happy to participate in interesting projects."

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