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Prestressed concrete electrical pole and its production

A production process and concrete technology, which is applied in the field of concrete poles and its production process, can solve problems such as uneven stress on steel bars, brittle failure, and large compressive stress of concrete bodies, and achieve line cost saving, concrete performance improvement, and bearing capacity Improved effect

Inactive Publication Date: 2009-02-18
吕森金
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is obviously no mention of what process to use to manufacture poles, to obtain high-strength poles with good rigidity and flexibility, the best cost performance, and easier and simpler installation to meet the performance requirements of users. The content of this aspect is still In particular, it is necessary to solve the problem that the steel bars in the thinner annular concrete body will not be unevenly stressed, causing brittle failure, and the compression stress of the concrete body will be too large when the prestress of the main reinforcement is released.

Method used

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  • Prestressed concrete electrical pole and its production
  • Prestressed concrete electrical pole and its production
  • Prestressed concrete electrical pole and its production

Examples

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Embodiment Construction

[0051] The design of the present invention is suitable for prestressed concrete poles with different pipe diameters and lengths, at least applicable to poles with a nominal diameter of Φ190-Φ350, a length of 12m-18m and more than 18m, so as to meet the different requirements of users, for example, Φ190× 18m, Φ230×18m, Φ310×18m, Φ350×18m, Φ230×15m, Φ190×12m, Φ190×15m, Φ350×12m, etc. Various specifications of electric poles, the taper of the pole is 1:75, and there is a single pole style like image 3 As shown, there are also two-stage rods divided into upper and lower sections, such as figure 1 As shown, for example, the two-section Φ190×18m can be divided into an upper section of 12m and a lower section of 6m to connect the end plate with bolts, such as Figure 6 , Figure 7 shown.

[0052] The electric pole of the present invention is composed of prestressed main ribs 3 and non-prestressed tendons 4, woven into a cage, assembled into a steel mold, poured into concrete slur...

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Abstract

This invention is a prestressed concrete pole and its construction method. The pole is of a conicity at 1:75, with holes for cables. It can be a single pole or sectional fabricated. The pole is made by reinforce bar cage centrifugal casting. The reinforce bar cage is composed by vertical main bars and normal bars fixed on supporting and positioning loops, and binding outside by helix wire. Two end plates are installed to the pole ends to fix the mail bars. After installed the end plates and before centrifugal casting, pull the plates with 1000-1900KN power, and steaming the concrete to grade over C60, then loose the power. In case of sectional fabricated, the sections are connected to each other through bolts.

Description

technical field [0001] The invention relates to a special mast for power transmission, in particular to a concrete pole used for erecting power transmission lines and its production process. Background technique [0002] The line from the substation used to transmit power below 110KV is usually used as a supporting base for iron towers, which will consume a lot of steel. At present, the circular prestressed concrete pole used to replace the iron tower as the support of the power line can increase the rigidity of the pole by applying prestress to the steel bars in the concrete with a circular cross section, so as to support the heavy load. Transmission lines; if all steel bars are prestressed, the flexural strength and impact strength will be lost, and the toughness will be insufficient. So there is a partially prestressed concrete pole. [0003] Application number 200420116150.0 "Partially prestressed concrete electric pole with steel basin ring at the root" (notification ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04H12/16B28B23/10B28B23/16B28B11/24E04H12/12
Inventor 吕森金
Owner 吕森金
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