Transforming plant assembly type cable duct body and spreading method

Abstract

The invention relates to a transformer substation assembly type cable trench body and a pavement method. The transformer substation assembly type cable trench body is mainly formed by connecting a plurality of sections of water-proof reinforced concrete trench bodies with U-shaped transverse cross-sections in sequence; a flange section and a groove which can be connected in tandem are respective arranged at the front and the rear ends of the trench body, a tongue-and-groove lapped back and forth is formed, and a rubber strip is installed between the trench bodies connected in tandem; the pavement method comprises the following steps: the cement bonded sand with thickness of 100 mm is paved on the conventional C15 plain concrete cushion course, and is used for the equalization of the assembly type cable trench body installed later; then the sections of the well prefabricated trench bodies are connected together through the lap-joint tongue-and-groove in sequence, and the rubber strip is underlaid at the connected point; and compared with the prior art, the invention has the advantages of reduced construction period, reduced pavement cost, improved work efficiency and labor productivity, greatly improved appearance quality and better popularization and application values.

Description

technical field [0001] The invention relates to a general-purpose assembled cable trench for a substation and an installation method thereof, and belongs to the technical field of design and construction of substations and power plants. Background technique [0002] At present, the design of cable trenches for substations above 220kV is made into brickwork, plain concrete, and reinforced concrete cable trenches according to the depth of embedment, load size, and groundwater level to meet the cable laying requirements of substations and power plants. However, with the development of my country's electric power industry, this kind of on-site cable trench body also faces the following problems: [0003] 1) The amount of masonry work on site is large and the construction time is long: taking a 220kV substation as an example, it is converted into a 1.1x0.85m cable trench body, and its total length is about 1100m. The estimated cost of the brick cable trench is 625 yuan / m 3 (Acc...

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Problems solved by technology

[0004] 2) The above cable trenches need to be painted inside and outside, and the brick and plain concrete cable trenches are also made of waterproof paint, which takes a lot of time; more materials are used, and the cost of resources is high; the most commonly used brick and plain concrete cable trenches The body often has the problem of excessive settlement and cracking on the soft soil foundation;

[0005] 3) At present, the construction of the substation of the State Grid Corporation of China is implemented according to the standard of "two types and one modernization", that is, environment-friendly, resource-saving, and industrialized. In addition, with the rapid development of the electric power industry, the construction period of the substation is also required to be greatly shortened. Fully assembled substations will definitely be the direction of development, but on-site production of cable trenches will hinder the promotion and application of fully assembled substations

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