CN102900095B - Transmission tower plate-type single rope foundation structure - Google Patents

Abstract

The invention discloses a single-cable foundation structure of a transmission pole tower plate, which comprises an upper plate laid on the ground surface and a lower plate buried in the ground, the upper plate and the lower plate are connected by steel strands, and the upper plate and the lower plate are connected by steel strands. The outside of the steel strand between the plates is provided with a rubber sleeve, and the inside of the rubber sleeve is filled with anti-corrosion filler; the two ends of the steel strand are respectively provided with an anchor head, and the upper anchor head is connected with the upper An upper bearing backing plate is provided between the plates, and a lower bearing backing plate is provided between the lower anchor head and the lower plate; four symmetrically arranged anchor bolts are poured on the upper bearing backing plate. The transmission pole tower-type single-cable foundation structure provided by the invention has the advantages of perfect and clear force transmission boundary conditions, fully exerting the physical and mechanical properties of various materials, saving investment, high safety and reliability, and simple construction, etc., and is suitable for small pull-out force , the loess area with good physical and mechanical properties of the foundation soil, such as the foundation mechanism of the line with a voltage level below 110kV.

Description

Transmission pole tower type single cable foundation structure

technical field

The invention relates to a power transmission pole and tower equipment, specifically a foundation fixing structure for a power transmission pole and tower.

Background technique

In large-thickness loess areas, the foundations of pole towers mainly adopt "big excavation" foundations, digging and bottom expansion foundations, and explosive expansion pile foundations. "Large excavation" foundation category refers to the foundation buried in the pre-excavated foundation pit and the backfill soil is compacted. It uses the disturbed backfill soil to form an uplift-resistant soil body to maintain the uplift stability of the foundation. Excavated and expanded bottom foundation refers to the foundation that is filled with concrete and steel skeleton in the soil tire excavated by machinery or manually. It maintains the uplift and stability of the foundation with the naturally formed uplift-resistant soil. Explosive expansion pile foundation refers to the short pile foundation with concrete and steel skeleton poured into the enlarged end of the soil tire formed by explosion expansion. The uplift soil is basically close to the undisturbed natural soil.

The main size of the "big excavation" foundation is determined by its uplift stability. In order to meet the requirements of uplift stability, the size of the foundation must be increased, which increases the cost of the foundation. The damage is also greater. Excavation and bottom expansion foundations are suitable for cohesive soil without water infiltration into the foundation pit. At the same time, the pile foundation specification stipulates that if the foundation adopts pile foundation, the bearing layer of the foundation must pass through collapsible loess, so this foundation is not suitable for large thickness Collapsible loess area. Explosive expansion pile foundation construction is more difficult, and there are certain difficulties in process and dimension inspection.

Contents of the invention

In order to solve the above problems, the present invention provides a single-cable foundation structure for transmission poles and towers suitable for the thick loess area.

The purpose of the present invention is specifically achieved through the following technical solutions:

The tower-type single-cable foundation structure of transmission poles includes an upper slab laid on the ground and a lower slab buried underground. The upper slab and the lower slab are connected by steel strands. The outside of the steel strand rope is provided with a rubber sleeve, and the two ends of the rubber sleeve are respectively in contact with the upper plate and the lower plate, and the inside of the rubber sleeve is filled with anti-corrosion filler; the two ends of the steel strand rope are respectively There is an anchor head, an upper load-bearing backing plate is set between the upper anchor head and the upper plate, and a lower load-bearing backing plate is set between the lower anchor head and the lower plate; four symmetrical Arranged anchor bolts. Both the upper plate and the lower plate are poured and formed with reinforced concrete materials.

The upper plate adopts a rectangular structure, and the area of the upper plate is much larger than that of the lower plate.

The tower plate type single cable foundation structure of the transmission pole provided by the present invention, the upper plate is used as the basic protective cap, has the advantages of perfect and clear force transmission boundary conditions, fully exerting the physical and mechanical properties of various materials, saving investment, high safety and reliability, and simple construction. , suitable for loess areas with small pull-up force and good physical and mechanical properties of the foundation soil, such as the foundation mechanism of the voltage level below 110kV.

The foundation structure is a flexible foundation, which can improve the ability of the tower to resist dynamic loads; at the same time, it can reduce the amount of spoil and protect the ecological environment; and it is easy to disassemble. If the foundation is no longer used, the steel strands can be cut directly. It only needs to dig out the upper plate, which reduces the amount of foundation demolition work; and the load transmission mechanism can also be used as the ground wire. The load transfer of the foundation structure is clear, and the structure calculation and construction are relatively simple.

Description of drawings

The present invention will be described in further detail below according to the drawings and embodiments.

Fig. 1 is a structural diagram of a transmission pole-tray type single-cable foundation structure according to an embodiment of the present invention.

Fig. 2 is a top view of the ground surface of the transmission pole tower-type single-cable foundation structure according to the embodiment of the present invention.

Detailed ways

As shown in Figure 1-2, the transmission pole tower type single-cable foundation structure according to the embodiment of the present invention includes an upper plate 1 laid on the ground surface and a lower plate 2 buried underground, the upper plate 1 and the lower plate 2 The steel strands 3 are connected between them, and the outside of the steel strand 3 between the upper plate 1 and the lower plate 2 is provided with a rubber sleeve 4, and the two ends of the rubber sleeve 4 are connected with the upper plate 1 and the lower plate respectively. Plate 2 is in contact, and the inside of the rubber sleeve 4 is filled with anti-corrosion filler 5; the two ends of the steel strand 3 are respectively provided with an anchor head 61, 62, and the upper anchor head 61 and the upper plate 1 are provided with There is an upper bearing base plate 71, and a lower bearing base plate 72 is provided between the lower anchor head 62 and the lower plate 2; the upper bearing base plate 71 is poured with four symmetrically arranged anchor bolts 8. Both the upper plate 1 and the lower plate 2 are poured and formed with reinforced concrete materials. The upper board 1 adopts a rectangular structure, and the area of the upper board 1 is much larger than that of the lower board 2 .

In the transmission pole tower-type single-cable foundation structure provided by the present invention, the upper plate 1 is used as a basic protective cap, which has perfect and clear force transmission boundary conditions, fully exerts the physical and mechanical properties of various materials, saves investment, has high safety and reliability, and is easy to construct, etc. Advantages, it is suitable for loess areas with small pull-out force and good physical and mechanical properties of the foundation soil, such as the foundation mechanism of the voltage level below 110kV.

The foundation structure is a flexible foundation, which can improve the ability of the tower to resist dynamic loads; at the same time, it can reduce the amount of spoil and protect the ecological environment; and it is easy to disassemble. If the foundation is no longer used, the steel strands can be cut directly. It only needs to dig out the upper plate, which reduces the amount of foundation demolition work; and the load transmission mechanism can also be used as the ground wire. The load transfer of the foundation structure is clear, and the structure calculation and construction are relatively simple.

Claims (2)

1. transmission tower plate-type single rope foundation structure, comprise the lower plate that a upper plate being laid on earth's surface and are embedded in underground, it is characterized in that, connected by steel strand rope between described upper plate and lower plate, described upper plate, lower plate is Reinforced Concrete Materials moulding by casting, described steel strand rope outside is between the upper and lower plates provided with gum cover pipe, the two ends of described gum cover pipe contact with lower plate with upper plate respectively, anticorrosive packing is filled with at described glue inside pipe casing, the two ends of described steel strand rope are respectively equipped with an anchor head, carrying backing plate is provided with between the anchor head on top and upper plate, lower carrying backing plate is provided with between the anchor head of bottom and lower plate.

2. transmission tower plate-type single rope foundation structure as claimed in claim 1, it is characterized in that, described upper carrying backing plate upper has four stone bolt be arranged symmetrically with.