Power transmission line metal assembly type foundation in plug-in connection

Abstract

The utility model discloses a power transmission line metal assembly type foundation in plug-in connection, and relates to the technical field of high-voltage power transmission line foundations. The support comprises insertion type angle steel, four support main materials and a foundation slab, the two support main materials form two support main material sets, each support main material set is of a herringbone structure, the upper ends of the support main materials are connected with the lower ends of the insertion type angle steel through bolts, and the lower ends of the support main materials are connected with the foundation slab; the foundation slab comprises two foundation slab main beams and a plurality of foundation slab secondary beam groups; the section type of the foundation slab girder is channel steel. According to a metal assembly type foundation of an existing power transmission line, tower legs and the foundation are mainly connected through tower base plates, and the connecting mode has the problems that the node structure is complex, the node economy is poor, and the precision requirement is high during machining, construction and assembly. The tower legs and the foundation slab are connected through the insertion type angle steel, the node structure is simple, the node economy is good, and the precision requirement is not high during machining, construction and assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of high-voltage power transmission line foundations, and more specifically to a metal assembled foundation for a power transmission line connected by insertion. Background Art

[0002] With the development of my country's society and economy, desert areas that were previously restricted areas for engineering construction are increasingly carrying out national key construction projects such as roads, oil and gas pipelines, water diversion projects, and power transmission (west-to-east power transmission). At the same time, with my country's energy and power development plans, there will be power transmission planning projects from Xinjiang to Sichuan and Chongqing and to the Inner Mongolia desert base, and many important overhead transmission lines will pass through desert Gobi areas.

[0003] In areas such as Gobi, deserts, and wastelands, the construction of overhead power transmission lines faces problems such as hot or cold weather, lack of water, difficulty in collecting sand and gravel, and loose foundations. Traditional reinforced concrete foundations face difficulties in material transportation, difficulty in curing cast-in-place concrete, long construction period, and high overall cost. Compared with other types (such as traditional reinforced concrete foundations, other concrete prefabricated foundations, etc.), metal prefabricated foundations have the advantages of light weight, small cross-section, convenient and fast construction, high quality, and strong adaptability to harsh areas. They can ensure the safety of the project while reducing the line cost, and have good engineering application prospects.

[0004] In the existing metal assembled foundations of power transmission lines, the tower legs and foundations are mainly connected by tower base plates. This connection method has problems such as complex node structure, poor node economy, and high precision requirements during processing and construction assembly. Therefore, it is necessary to develop a metal assembled foundation for power transmission lines with simple structure, easy installation, safety, reliability, and economical and reasonable insertion connection. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings of the above-mentioned background technology and to provide a metal assembled foundation for a power transmission line with an insertion connection.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the utility model is: a metal assembled foundation for a power transmission line with insertion connection, characterized in that it comprises an inserted angle steel, four bracket main materials and a foundation bottom plate, wherein the upper end of the inserted angle steel is located above the ground and the lower end is located below the ground;

[0007] The cross-section of the bracket main material is angle steel. Two bracket main materials form a bracket main material group. There are two bracket main material groups. Each bracket main material group is in a herringbone structure. The upper end of the bracket main material is bent and connected to the lower end of the inserted angle steel with bolts, and the lower end is connected to the foundation bottom plate.

[0008] The foundation floor comprises two foundation floor main beams arranged at intervals and a plurality of foundation floor secondary beam groups located at the bottom of the two foundation floor main beams; the cross-section of the foundation floor main beams is channel steel, the bottom of one group of bracket main material groups is bolted to one foundation floor main beam, and the bottom of another group of bracket main material groups is bolted to another foundation floor main beam.

[0009] In the above technical solution, the foundation slab secondary beam group includes two spliced ​​foundation slab secondary beams, and the cross-sectional type of the foundation slab secondary beams is equilateral angle steel.

[0010] In the above technical solution, main beam reinforcement ribs are provided at the connection between the foundation slab main beam and the foundation slab secondary beam group.

[0011] In the above technical solution, the foundation slab also includes a short angle steel attached to the outside of the main material, one side of the short angle steel attached to the outside of the main material is bolted to the bottom of the bracket main material, and the other side is bolted to the main beam of the foundation slab.

[0012] In the above technical solution, the length of the foundation slab secondary beam is W. After one end of the foundation slab secondary beam is connected to a foundation slab main beam, it is cantilevered at a cantilever distance W1. After the other end of the foundation slab secondary beam is connected to another foundation slab main beam, it is cantilevered at a cantilever distance W1. The value of W1 / W is between 1 / 6 and 1 / 5.

[0013] In the above technical solution, a supporting structure is also included, and two adjacent bracket main materials are connected to the supporting structure by bolts.

[0014] In the above technical solution, the support structure includes a support horizontal support and a support diagonal support.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] 1) In the existing metal assembled foundation of the transmission line, the tower legs and the foundation are mainly connected by the tower base plate. This connection method has the problems of complex node structure, poor node economy, and high precision requirements during processing and construction assembly. The tower legs of the utility model are connected to the foundation bottom plate by inserted angle steels, which has a simple node structure, good node economy, and low precision requirements during processing and construction assembly.

[0017] 2) The utility model reduces the amount of foundation steel by 15%-25% while ensuring the stability and safety of the foundation, and reduces the number of processing types of the foundation bottom plate main beam, thereby saving labor and time, improving construction efficiency, and reducing engineering costs.

[0018] 3) The cross-sectional type of the main material of the bracket of the utility model is angle steel. The upper end of the main material of the bracket is bent and connected to the inserted angle steel by bolts, which is convenient for basic processing and assembly; the two adjacent main materials of the bracket are connected to the supporting structure by bolts, which is convenient for basic processing and assembly; the main material of the bracket is connected to the main beam of the foundation bottom plate by bolts, which is convenient for basic processing and assembly; the short angle steel attached to the outside of the main material is connected to the main material of the bracket and the main beam of the foundation bottom plate by bolts, which is convenient for basic processing and assembly.

[0019] 4) The cross-sectional type of the secondary beam of the foundation slab of the utility model is an equilateral angle steel, which has good stress-bearing performance and strong applicability, reduces the components and reduces the types of main beam steel, and is easy to install. The secondary beam of the foundation slab in the prior art adopts a single channel steel type. Too many single channel steels will lead to too many components and a large number of main beam steel types, which will increase the difficulty of installation and poor stress-bearing performance.

[0020] 5) The main beam reinforcement ribs of the utility model are welded on the main beam of the foundation bottom plate to improve the rigidity of the main beam; the short angle steel attached to the outside of the main material is connected to the bracket main material and the main beam of the foundation bottom plate by bolts to enhance the connection strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front view of the utility model.

[0022] Figure 2 It is a side view of the utility model.

[0023] Figure 3 A schematic diagram of the structure of the base plate.

[0024] Among them, 1-inserted angle steel, 2-main material of the bracket, 3-foundation bottom plate, 31-main beam of the foundation bottom plate, 32-secondary beam group of the foundation bottom plate, 321-secondary beam of the foundation bottom plate, 33-main beam reinforcement ribs, 34-short angle steel attached to the outside of the main material, 4-support structure, 41-horizontal support of the bracket, 42-diagonal support of the bracket. DETAILED DESCRIPTION

[0025] The following is a detailed description of the implementation of the utility model in conjunction with the accompanying drawings, but they do not constitute a limitation of the utility model and are only used as examples. At the same time, the advantages of the utility model will become clearer and easier to understand through the description.

[0026] Referring to the attached drawings, it can be seen that: a metal assembled foundation for a power transmission line with insertion connection comprises an inserted angle steel 1, four bracket main materials 2 and a foundation bottom plate 3, wherein the upper end of the inserted angle steel 1 is located above the ground and the lower end is located below the ground;

[0027] The cross-section of the bracket main material 2 is an angle steel. Two bracket main materials 2 form a bracket main material group. There are two bracket main material groups. Each bracket main material group is in a herringbone structure. The upper end of the bracket main material 2 is bent and connected to the lower end of the inserted angle steel 1 with bolts, and the lower end is connected to the foundation bottom plate 3.

[0028] The foundation floor 3 includes two foundation floor main beams 31 arranged at intervals and a plurality of foundation floor secondary beam groups 32 located at the bottom of the two foundation floor main beams 31; the cross-sectional type of the foundation floor main beams 31 is channel steel, the bottom of one group of bracket main material groups is bolted to one foundation floor main beam 31, and the bottom of another group of bracket main material groups is bolted to another foundation floor main beam 31.

[0029] The foundation bottom plate secondary beam group 32 located at the bottom of the foundation bottom plate main beam 31 is two spliced ​​foundation bottom plate secondary beams 321, and the cross-sectional type of the foundation bottom plate secondary beams 321 is an equilateral angle steel. One side of the two foundation bottom plate secondary beams 321 is spliced ​​into a long side, and the other side is spliced ​​vertically downward; the foundation bottom plate secondary beam groups 32 located at both ends of the bottom of the foundation bottom plate main beam 31 are single foundation bottom plate secondary beams 321.

[0030] A main beam reinforcement rib 33 is provided at the connection between the foundation floor main beam 31 and the foundation floor secondary beam group 32 .

[0031] The foundation slab 3 also includes a main material external short angle steel 34 , one side of the main material external short angle steel 34 is bolted to the bottom of the bracket main material 2 , and the other side is bolted to the foundation slab main beam 31 .

[0032] The length of the foundation slab secondary beam 321 is W. One end of the foundation slab secondary beam 321 is connected to a foundation slab main beam 31 and is cantilevered by a cantilever distance W1. The other end of the foundation slab secondary beam 321 is connected to another foundation slab main beam 31 and is cantilevered by a cantilever distance W1. The value of W1 / W is between 1 / 6 and 1 / 5. The length of the foundation slab main beam 31 is W.

[0033] It also includes a support structure 4, and two adjacent bracket main materials 2 are connected to the support structure 3 with bolts.

[0034] The support structure 4 includes a support horizontal support 41 and a support diagonal support 42. The support horizontal support 41 is bolted between the middle parts of two adjacent support main materials 2. The support diagonal support 42 is bolted between the middle and lower parts of one support main material 2 and the lower part of the other support main material 2. The support diagonal support 42 is located below the support horizontal support 41.

[0035] In actual use, Figure 1 and Figure 2 In the figure, H is the buried depth of the present invention, in m; H1 is the height of the foundation slab main beam 31, in m; H2 is the height of the foundation slab secondary beam group 32, in m.

[0036] In the present invention, the width of the upper flange and the lower flange of the foundation floor main beam 31 are consistent.

[0037] A plurality of foundation floor secondary beam groups 32 are arranged in parallel and spaced apart at the bottom of the foundation floor main beam 31 between the bracket main material groups, and there is no foundation floor secondary beam group 32 at the bottom of the connection between the bracket main material group and the foundation floor main beam 31 .

[0038] All the cross-section types of the components of the utility model are made of commonly used hot-rolled steel. Different anti-corrosion measures can be adopted according to the corrosion intensity level of the environment. Hot-dip galvanized anti-corrosion angle steel and ordinary bolts can be used in weak corrosion and micro-corrosion environments; hot-dip galvanized angle steel, coated with epoxy coal tar, and hot-dip galvanized bolts can be used in medium corrosion environments; hot-dip galvanized angle steel, coated with polyurea coating, surface zinc-dipped bolts, and glass fiber reinforced plastic templates can be added when necessary in strong corrosion environments. According to different corrosion environments, necessary corrosion allowances are reserved for steel structure components.

[0039] The utility model is a basic type with simple structure, convenient installation, safety, reliability and economic rationality; the utility model can be applied to ultra-high voltage and extra-high voltage transmission line projects of different voltage levels, and is mainly applied to Gobi and desert areas with inconvenient transportation and difficult concrete pouring.

[0040] Other parts not described belong to the prior art.

Claims

1. A metal assembled foundation for a power transmission line with insertion connection, characterized in that: It comprises an inserted angle steel (1), four bracket main materials (2) and a base bottom plate (3), wherein the upper end of the inserted angle steel (1) is located above the ground and the lower end is located below the ground; The cross-section of the bracket main material (2) is an angle steel. Two bracket main materials (2) form a bracket main material group. There are two bracket main material groups. Each bracket main material group is in a herringbone structure. The upper end of the bracket main material (2) is bent and connected to the lower end of the inserted angle steel (1) by bolts, and the lower end is connected to the foundation bottom plate (3). The foundation floor (3) comprises two foundation floor main beams (31) arranged at intervals, and a plurality of foundation floor secondary beam groups (32) located at the bottom of the two foundation floor main beams (31); the cross-section of the foundation floor main beams (31) is a channel steel, the bottom of one group of bracket main material groups is bolted to one foundation floor main beam (31), and the bottom of another group of bracket main material groups is bolted to another foundation floor main beam (31).

2. The metal assembled foundation for power transmission lines with insertion connection according to claim 1, characterized in that: The foundation slab secondary beam group (32) comprises two spliced ​​foundation slab secondary beams (321), and the cross-section of the foundation slab secondary beams (321) is an equilateral angle steel.

3. The metal assembled foundation for power transmission lines with insertion connection according to claim 1 or 2, characterized in that: Main beam reinforcing ribs (33) are provided at the connection between the foundation bottom plate main beam (31) and the foundation bottom plate secondary beam group (32).

4. The metal assembled foundation for power transmission lines with insertion connection according to claim 1, characterized in that: The foundation base plate (3) also includes a main material externally attached short angle steel (34), one side of the main material externally attached short angle steel (34) is bolted to the bottom of the bracket main material (2) and the other side is bolted to the foundation base plate main beam (31).

5. The metal assembled foundation for power transmission lines with insertion connection according to claim 1, characterized in that: The length of the foundation slab secondary beam (321) is W. One end of the foundation slab secondary beam (321) is connected to a foundation slab main beam (31) and then cantilevered by a cantilever distance W1. The other end of the foundation slab secondary beam (321) is connected to another foundation slab main beam (31) and then cantilevered by a cantilever distance W1. The value of W1 / W is between 1 / 6 and 1 / 5.

6. The metal assembled foundation for power transmission lines with insertion connection according to claim 1, characterized in that: It also includes a supporting structure (4), and two adjacent bracket main materials (2) are connected to the supporting structure (4) by bolts.

7. The metal assembled foundation for power transmission lines with insertion connection according to claim 6, characterized in that: The support structure (4) comprises a support horizontal support (41) and a support diagonal support (42).

Images