An assembled transmission line foundation

Abstract

The present invention discloses an assembled power transmission line foundation, comprising a base and a column mounted on the base. The base comprises a plurality of assembly units, each of which is composed of a first core, a first panel disposed on the top of the first core, and a second panel disposed on the bottom of the first core. The first core comprises a plurality of first GFRP tubes arranged side by side in a horizontal direction. A fiber bundle is disposed on the periphery of the assembly unit, and the fiber bundle winds the first panel, the second panel, and the first core together. A plurality of the assembly units are stacked together to form the base. The assembled power transmission line foundation has the characteristics of good corrosion resistance, light weight and high strength, good fatigue performance, low maintenance cost, and convenient transportation. In addition, the structure of the assembly units enables the assembled power transmission line foundation to be assembled and spliced, thereby shortening the construction period, making installation more convenient, and reducing the construction difficulty. The foundation is suitable for areas with severe corrosion.

Description

Technical Field

[0001] The present invention is used in the technical field of power transmission line engineering, and in particular relates to an assembled power transmission line foundation. Background Art

[0002] With the rapid development of coastal cities, a large number of high-voltage transmission line projects have emerged rapidly. The existing transmission line foundations use cast-in-place concrete structures. Since coastal areas suffer from a far more severe natural environment than inland areas, a considerable portion of the transmission line foundations are exposed to seawater for a long time. Therefore, the transmission line foundations will be corroded by chloride ions in seawater, groundwater and air for a long time. This will greatly weaken the durability of the transmission line foundation structure and even easily cause damage to the transmission line foundation structure. At present, for the transmission line foundations located in corrosive areas, anti-corrosion measures generally include adopting high-performance concrete, coating the concrete surface for protection, and adding rust inhibitors to the concrete. However, in recent years, the transmission line foundations in some highly corrosive areas have shown the effectiveness of the anti-corrosion layer, varying degrees of corrosion of the transmission line foundation concrete, and corrosion of individual steel bars. This is related to construction quality and changes in the operating environment. Once the transmission line foundation structure is damaged, it cannot be repaired, causing huge losses. Therefore, simply strengthening anti-corrosion treatment cannot fundamentally solve the foundation construction problems in highly corrosive areas. In addition, the current anti-corrosion transmission line foundation requires a large number of processes such as formwork support, steel bar binding, concrete pouring, and foundation maintenance, resulting in a long construction period. Summary of the Invention

[0003] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide an assembled power transmission line foundation with strong anti-corrosion effect and short construction period.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] An assembled power transmission line foundation includes a base and columns mounted on the base. The base includes multiple assembly units, each of which is composed of a first core, a first panel provided on the top of the first core, and a second panel provided on the bottom of the first core. The first core includes multiple first GFRP tubes arranged side by side in a horizontal direction. Fiber bundles are provided on the periphery of the assembly units, and the fiber bundles wrap the first panel, the second panel, and the first core together. Multiple assembly units are stacked together to form the base.

[0006] Preferably, the cross section of the first GFRP tube is square, adjacent first GFRP tubes are bonded together, each first core includes four or six first GFRP tubes, and the first panel and the second panel are bonded to the first core.

[0007] Preferably, the winding angle of the fiber bundle is ±80°, and the fiber bundle is bidirectionally wound around the periphery of the assembly unit after being dipped in glue.

[0008] Preferably, the first panel and the second panel are both provided with a plurality of first fibers, the first fibers are perpendicular to the installation direction of the transmission line, the first panel and the second panel are both provided with a plurality of second fibers perpendicular to the first fibers, the second fibers are arranged along the installation direction of the transmission line, the ratio of the number of the first fibers to the second fibers is 4:1, and the first fibers and the second fibers are both high-strength glass fibers.

[0009] Preferably, the column is composed of a second core and a plurality of third panels arranged on the outer periphery of the second core, the second core includes a plurality of second GFRP tubes arranged along the inner periphery of the column, each of the second GFRP tubes is arranged along the height direction and bonded to each other, and there are four second GFRP tubes and four third panels.

[0010] Preferably, the first panel, the second panel and the third panel all contain epoxy resin material, the first GFRP tube body and the second GFRP tube body are both provided with high-strength glass fiber with a winding angle of ±45°, and the interiors of the first GFRP tube body and the second GFRP tube body are both filled with fillers.

[0011] Preferably, the base and the column are connected by anchor bars, and the anchor bars are glass fiber prestressed anchor bars.

[0012] Preferably, the contact surfaces between adjacent assembly units are bonded by resin, GFRP anchor bars are provided between adjacent assembly units, and the GFRP anchor bars penetrate the first GFRP tube bodies in the adjacent assembly units.

[0013] Preferably, a first tower base plate is provided on the top of the column, and a second tower base plate is provided on the bottom of the column. The first tower base plate and the second tower base plate are both arranged around the outer circumference of the column, and the second tower base plate is pre-buried inside the base.

[0014] Preferably, the first tower base plate and the column, as well as the second tower base plate and the column, are connected by adhesive connection and bolt connection. Adhesive is first applied between the first tower base plate and the column or between the second tower base plate and the column, and before the adhesive cures, the bolt connection between the first tower base plate and the column or between the second tower base plate and the column is completed.

[0015] One of the above technical solutions has at least one of the following advantages or beneficial effects: the fiber bundle of the assembled transmission line foundation wraps the first panel, the second panel and the first core together to better constrain the first panel, the second panel and the first core therein, enhances the bonding performance of the interface between the first panel, the second panel and the first core, and provides a certain lateral stiffness. During use, the first panel is compressed and the second panel is tensile, and they both bear bending moment. The first core is sandwiched between the first panel and the second panel, which is equivalent to a web. The first core bears shear force on the one hand and connects the first panel and the second panel on the other hand, thereby improving the mechanical strength of the assembly unit. Multiple assembly units 110 are stacked together to form a base. The assembled transmission line foundation uses GFRP material to achieve good corrosion resistance, light weight and high strength, good fatigue performance, low maintenance cost, and convenient transportation. The structure of the assembly unit enables the assembled transmission line foundation to be assembled and spliced, shortening the construction period, making installation more convenient, and reducing construction difficulty. It is suitable for areas with strong corrosion.

[0016] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0018] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0019] Figure 2 This is one of the structural diagrams of an embodiment of an assembly unit in the present invention;

[0020] Figure 3 is a cross-sectional view of an embodiment of a column in the present invention;

[0021] Figure 4 yes Figure 1 Cross-section at AA;

[0022] Figure 5 This is the second structural diagram of an embodiment of the assembly unit of the present invention;

[0023] Figure 6 This is one of the schematic diagrams of the connection structure of each assembly unit in the present invention;

[0024] Figure 7 This is the second schematic diagram of the connection structure of each assembly unit in the present invention. DETAILED DESCRIPTION

[0025] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it should not be understood as a limitation on the scope of protection of the present invention.

[0026] In the present invention, if directions (up, down, left, right, front and back) are described, it is only for the convenience of describing the technical solution of the present invention, and does not indicate or imply that the technical features referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation of the present invention.

[0027] In the present invention, "several" means one or more, "multiple" means more than two, "greater than," "less than," "exceeds," etc. are understood to exclude the number itself; "above," "below," "within," etc. are understood to include the number itself. In the description of the present invention, the use of "first" or "second" is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0028] In the present invention, unless otherwise expressly defined, terms such as "disposed," "installed," and "connected" should be interpreted broadly. For example, they may refer to direct connection or indirect connection through an intermediate medium; fixed connection or detachable connection or integral molding; mechanical connection or electrical connection or mutual communication; and internal connection between two components or interaction between two components. Those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0029] in, Figure 1 The reference direction coordinate system of the embodiment of the present invention is given. Figure 1 The direction shown in is the direction of transmission line installation. Figure 1 The embodiment of the present invention is described with reference to the direction shown.

[0030] The embodiment of the present invention provides a fabricated transmission line foundation, see Figure 1 , including a base 100 and a column 200 mounted on the base 100, the base 100 includes a plurality of assembly units 110, see Figure 2The assembly unit 110 is composed of a first core 111, a first panel 112 provided on the top of the first core 111, and a second panel 113 provided on the bottom of the first core 111. The first core 111 includes a plurality of first GFRP tubes 114 arranged side by side in the horizontal direction. A fiber bundle is provided on the periphery of the assembly unit 110. The fiber bundle wraps the first panel 112, the second panel 113 and the first core 111 together to better constrain the first panel 112, the second panel 113 and the first core 111 therein, thereby enhancing the bonding performance of the interface between the first panel 112, the second panel 113 and the first core 111 and providing a certain lateral stiffness. During use, the first panel 112 is compressed and the second panel 113 is pulled to jointly withstand bending moment. The first core 111 is sandwiched between the first panel 112 and the second panel 113, which is equivalent to a web. The first core 111 bears shear force on the one hand and connects the first panel 112 and the second panel 113 on the other hand, thereby improving the mechanical strength of the assembly unit. Figure 1 A plurality of assembly units 110 are stacked together to form a base 100. The assembled transmission line foundation uses GFRP material to achieve good corrosion resistance, light weight and high strength, good fatigue performance, low maintenance cost, and convenient transportation. The structure of the assembly units 110 enables the assembled transmission line foundation to be assembled and spliced, shortening the construction period, making installation more convenient, and reducing the construction difficulty. It is suitable for areas with strong corrosion and has the advantages of greatly reducing the time required for formwork support, steel bar binding, concrete curing, and tower assembly intervals in existing transmission line foundations.

[0031] See also Figure 2 The cross section of the first GFRP tube 114 is square, and adjacent first GFRP tubes 114 are bonded together. Each first core 111 includes four or six first GFRP tubes 114 , and the first panel 112 and the second panel 113 are both bonded together with the first core 111 .

[0032] In some embodiments, the winding angle of the fiber bundle is ±80°, and the fiber bundle is bidirectionally wound around the periphery of the assembly unit 110 after being dipped in glue to better constrain the first panel 112, the second panel 113 and the first core 111 inside it, thereby enhancing the bonding performance of the interface between the first panel 112, the second panel 113 and the first core 111 and providing a certain lateral stiffness. Such an arrangement enables the fiber directions of the first panel 112 and the second panel 113 to be along their main force directions, so that they can be more fully utilized and obtain better force-bearing performance.

[0033] As a preferred embodiment of the present invention, a plurality of first fibers are provided in the first panel 112 and the second panel 113, and the first fibers are perpendicular to the direction in which the transmission line is erected. The first fibers can effectively provide bending bearing capacity and bending stiffness. However, since the first panel 112 and the second panel 113 are relatively wide, the use of all first fibers can easily lead to surface cracking. Therefore, a plurality of second fibers perpendicular to the first fibers are provided in the first panel 112 and the second panel 113, and the second fibers are arranged along the direction in which the transmission line is erected. The ratio of the number of the first fibers to the second fibers is 4:1, and the first fibers and the second fibers are both high-strength glass fibers.

[0034] See also Figure 3 The column 200 is composed of a second core 210 and a plurality of third panels 220 arranged on the outer periphery of the second core 210. The second core 210 includes a plurality of second GFRP tubes 211 arranged along the inner periphery of the column 200. Each second GFRP tube 211 is arranged along the height direction and bonded to each other. In some embodiments, there are four second GFRP tubes 211 and four third panels 220.

[0035] As a preferred embodiment of the present invention, the first panel 112, the second panel 113 and the third panel 220 all comprise epoxy resin material, and the first GFRP tube 114 and the second GFRP tube 211 are both provided with high-strength glass fibers with a winding angle of ±45°, which can provide sufficient shear bearing capacity. In some embodiments, the first GFRP tube 114 and the second GFRP tube 211 are both filled with fillers, see Figure 5 A filler 115 is provided in the first GFRP pipe body 114. Preferably, the filler can be made from local materials, and the excavated foundation pit soil and stone can be poured into the hollow slab to increase the deadweight of the assembled transmission line foundation and improve the pull-out bearing capacity.

[0036] As a preferred embodiment of the present invention, the base 100 and the column 200 are connected by anchor bars, which are glass fiber prestressed anchor bars.

[0037] See also Figure 6 、 Figure 7 , the contact surfaces between adjacent assembly units 110 are bonded by resin 130, see Figure 1 GFRP anchor bars 120 are provided between adjacent assembly units 110, and the GFRP anchor bars penetrate the first GFRP tube bodies 114 in the adjacent assembly units 110. Preferably, before the resin 130 is bonded, the contact surfaces between the adjacent assembly units 110 are polished and cleaned with acetone, and then the adhesive (vinyl) is evenly applied to the contact surfaces, and then the GFRP anchor bars 120 are passed through the tube wall of the first GFRP tube body 114 to achieve a stable connection.

[0038] See also Figure 1 A first tower base plate 300 is provided at the top of the column 200, and a second tower base plate 400 is provided at the bottom of the column 200. The first tower base plate 300 and the second tower base plate 400 are both arranged around the outer periphery of the column 200, and the second tower base plate 400 is pre-buried inside the base 100.

[0039] As a preferred embodiment of the present invention, the first tower base plate 300 and the column 200, as well as the second tower base plate 400 and the column 200, are both connected by adhesive bonding and bolts. An adhesive is first applied between the first tower base plate 300 and the column 200 or between the second tower base plate 400 and the column 200. Before the adhesive cures, the bolt connection between the first tower base plate 300 and the column 200 or between the second tower base plate 400 and the column 200 is completed. Figure 4 The first tower base plate 300 is connected to the column 200 by bolts, and the first tower base plate 300 and the column 200, as well as the second tower base plate 400 and the column 200, are assembled and spliced by a mixed connection method of glue bolts. The adhesive connection does not require openings in the structure, which reduces damage to the structure. However, the strength and performance of the adhesive connection are not stable enough and are easily affected by construction quality and environmental factors. The bolt connection is convenient to construct, generally has a more stable bearing capacity, and the strength calculation is also simpler and more convenient, but it causes certain damage to the components. Therefore, the present invention adopts a mixed connection of glue bolts, which is a connection method that combines the above two connection methods, which can improve the stability of the node performance and has the advantages of good corrosion resistance, light weight and high strength, and easy transportation and installation.

[0040] Taking the foundation force of a typical conventional transmission line straight tower as an example, a technical and economic comparison was made with an ordinary concrete straight column slab foundation. The comprehensive cost of the assembled transmission line foundation of the present invention is slightly higher than that of an ordinary concrete foundation. The comprehensive cost of a single foundation increases by approximately RMB 26,000, or approximately 10%. However, it can reduce the time for formwork support, steel bar tying, concrete curing, and tower assembly intervals, saving 12 days of construction time.

[0041] Throughout this specification, references to terms such as "example," "embodiment," or "some embodiments" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0042] Of course, the invention is not limited to the above-mentioned embodiments. Those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. An assembled power transmission line foundation, characterized by: The base comprises a base and a column mounted on the base, wherein the base comprises a plurality of assembly units, wherein the assembly units are composed of a first core, a first panel disposed on the top of the first core, and a second panel disposed on the bottom of the first core, wherein the first core comprises a plurality of first GFRP tubes arranged side by side in a horizontal direction, and a fiber bundle is disposed on the periphery of the assembly unit, wherein the fiber bundle winds the first panel, the second panel, and the first core together, and a plurality of the assembly units are stacked together to form the base; The first panel and the second panel are both provided with a plurality of first fibers, the first fibers being perpendicular to the direction in which the transmission line is erected; the first panel and the second panel are both provided with a plurality of second fibers being perpendicular to the first fibers, the second fibers being arranged along the direction in which the transmission line is erected; the ratio of the first fibers to the second fibers is 4:1, and both the first fibers and the second fibers are high-strength glass fibers; The column is composed of a second core and a plurality of third panels arranged on the outer periphery of the second core. The second core includes a plurality of second GFRP tubes arranged along the inner periphery of the column. Each of the second GFRP tubes is arranged in the height direction and bonded together. There are four second GFRP tubes and four third panels. A first tower base plate is provided on the top of the column, and a second tower base plate is provided on the bottom of the column. The first tower base plate and the second tower base plate are both provided around the outer circumference of the column, and the second tower base plate is pre-buried inside the base; The first tower base plate and the column, as well as the second tower base plate and the column, are connected by adhesive and bolts. Adhesive is first applied between the first tower base plate and the column or between the second tower base plate and the column, and before the adhesive cures, the bolt connection between the first tower base plate and the column or between the second tower base plate and the column is completed.

2. The assembled power transmission line foundation according to claim 1, characterized in that: The cross section of the first GFRP tube is square, adjacent first GFRP tubes are bonded together, each first core includes four or six first GFRP tubes, and the first panel and the second panel are bonded to the first core.

3. The assembled power transmission line foundation according to claim 1, characterized in that: The winding angle of the fiber bundle is ±80°, and the fiber bundle is bidirectionally wound around the periphery of the assembly unit after being dipped in glue.

4. The assembled power transmission line foundation according to claim 1, characterized in that: The first panel, the second panel and the third panel all contain epoxy resin material, the first GFRP tube body and the second GFRP tube body are both provided with high-strength glass fibers with a winding angle of ±45°, and the interiors of the first GFRP tube body and the second GFRP tube body are both filled with fillers.

5. The assembled power transmission line foundation according to claim 1, characterized in that: The base and the column are connected by anchor bars, and the anchor bars are glass fiber prestressed anchor bars.

6. The assembled power transmission line foundation according to claim 1, characterized in that: The contact surfaces between the adjacent assembly units are bonded by resin. GFRP anchor bars are provided between the adjacent assembly units. The GFRP anchor bars penetrate through the first GFRP tube bodies in the adjacent assembly units.

Images