High-strength concrete stand column and steel pipe composite structure of extra-high voltage steel pipe tower

Abstract

The utility model provides a high-strength concrete stand column steel pipe composite structure of an extra-high pressure steel pipe tower, which comprises a base and a tower body fixed on the base, the tower body comprises a plurality of tower sections connected through high-rib high-strength steel connecting flanges, and the middle and lower sections of the tower sections adopt high-strength concrete solid structures and high-strength steel pipe column composites; the high-strength concrete solid structure and high-strength steel pipe column composite body comprises a hollow steel pipe, the hollow steel pipe is filled with high-strength self-compacting micro-expansion concrete and high-strength steel stirrups, and the hollow steel pipe is internally provided with tension high-strength steel stirrups penetrating through the hollow steel pipe from top to bottom. The tops of the tension high-strength steel stirrups are connected with the junction operation platform through the tension column anchorage devices, and the bottoms of the tension high-strength steel stirrups are fixed underground through the tension column anchorage devices. A conventional high-strength steel pipe structure and a self-compacting micro-expansion prestressed concrete solid filling structure are adopted, the stress limit requirement for a pure steel pipe structure is lowered, the comprehensive manufacturing cost is reduced, the operation stability is improved, and the effective operation service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of ultra-high voltage power transmission and super-high iron towers, in particular to an ultra-high voltage steel pipe tower high-strength concrete column steel pipe composite structure. Background Art

[0002] Ultra-high voltage towers or super-high river-crossing and sea-crossing towers above 220KV need to be built with steel pipe structure towers with a height of more than 200 meters due to the long distance between the two ends of the river and the sea, and considering factors such as arc drop and line stress. In such a situation, the diameter and thickness of the steel pipe structure of the bottom tower will need to exceed the processing range, and the tower column is prone to fatigue stress, which can easily affect the operation safety. Utility Model Content

[0003] In order to solve the problems of the prior art, the utility model provides a high-strength concrete column steel pipe composite structure of an ultra-high voltage steel pipe tower, which adopts a conventional high-strength steel pipe structure plus a self-compacting micro-expansion prestressed concrete solid filling structure, reduces the force limit requirements for the pure steel pipe structure, reduces the comprehensive cost, and improves the operation stability and effective operation life.

[0004] The utility model comprises a base and a tower body fixed on the base, the tower body comprises a plurality of tower sections connected by high-reinforced high-strength steel connecting flanges, the tower section comprises a middle-upper section and a middle-lower section, a junction operation platform is arranged at the connection between the middle-upper section and the middle-lower section, the middle-lower section of the tower section adopts a high-strength concrete solid structure and a high-strength steel pipe column composite; the high-strength concrete solid structure and the high-strength steel pipe column composite comprise a hollow steel pipe, the hollow steel pipe is filled with high-strength self-compacting micro-expansive concrete and high-strength steel stirrups, the hollow steel pipe is provided with expansion-tension high-strength steel stirrups penetrating the hollow steel pipe from top to bottom, the top of the expansion-tension high-strength steel stirrups is connected to the junction operation platform by an expansion column anchor, and the bottom is fixed underground by the expansion column anchor.

[0005] According to a further improvement, the base includes foundation concrete, foundation concrete piers and a bottom plate, the bottom plate is buried in the foundation concrete, the lowest tower section passes through the foundation concrete pier and is inserted into the foundation concrete, and is fixedly connected to the bottom plate by foundation anchor bolts.

[0006] As a further improvement, an expansion column anchor plate is arranged inside the high-reinforced high-strength steel connecting flange, a plurality of holes are opened on the expansion column anchor plate, and the expansion and tension high-strength steel stirrups pass through the holes of the expansion column anchor plate.

[0007] Further improvement, the high-ribbed high-strength steel connecting flange includes two flanges connected by bolts, a flange connection sealing layer is arranged between the two flanges, flange sealant restraining clamps are sleeved on the outer edges of the two flanges, flange connection peripheral sealant is arranged between the outer edges of the flanges and the flange sealant restraining clamps, flange connection pipe sealant is arranged between the tower section and the flange, and flange connection bolt hole sealing gaskets are arranged between the bolts and the flange.

[0008] As a further improvement, the high-strength steel stirrups are composed of a plurality of steel bar sections connected by prestressed steel wire joints.

[0009] The beneficial effects of the utility model are:

[0010] 1. The conventional high-strength steel pipe structure plus the self-compacting micro-expansion prestressed concrete solid filling structure is adopted to reduce the stress limit requirements for the pure steel pipe structure, reduce the overall cost, and improve the operation stability and effective operation life.

[0011] 2. The flange connection is sealed with multiple layers to ensure reliable sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0013] Figure 1 It is a schematic diagram of the structure of the middle and lower sections of the tower section;

[0014] Figure 2 It is a schematic diagram of the connection between the middle and lower sections of the tower section and the middle and upper sections of the tower section;

[0015] Figure 3 This is a schematic diagram of the internal structure of the high-reinforced high-strength steel connection flange;

[0016] Figure 4 is a schematic diagram of the base structure;

[0017] Figure 5 This is a schematic diagram of the high-reinforced high-strength steel flange connection;

[0018] Figure 6 This is a schematic diagram of the sealing of the high-reinforced high-strength steel connection flange;

[0019] Figure 7 This is a schematic diagram of the tower structure.

[0020] In the figure, 1: the lower middle section of the tower section, 2: high-strength self-compacting slightly expansive concrete, 3: tensioned high-strength steel stirrups, 4: high-strength steel stirrups, 5: high-strength steel connection flange, 6: operation platform at the junction, 7: expansion column anchor, 8: prestressed steel wire joint, 9: the upper middle section of the tower section, 10: expansion column anchor plate, 11: foundation anchor bolts, 12: foundation concrete pier, 13: foundation concrete, 14. Sealing layer at flange connection, 15. Sealant inside the pipe at flange connection, 16. Sealant around the flange connection, 17. Flange sealant restraining clamp, 18. Bolt hole sealing gasket at flange connection. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] The utility model structure is as follows Figure 1-7 As shown, it includes a base and a tower body fixed on the base, the tower body includes a number of tower sections connected by high-reinforced high-strength steel connecting flanges 5, the tower section includes a tower section middle and upper section 9 and a tower section middle and lower section 1, a junction operation platform 6 is arranged at the connection between the tower section middle and upper section and the tower section middle and lower section, the tower section middle and lower section adopts a high-strength concrete solid structure and a high-strength steel pipe column composite; the high-strength concrete solid structure and the high-strength steel pipe column composite include a hollow steel pipe, the hollow steel pipe is filled with high-strength self-compacting micro-expansive concrete 2 and high-strength steel stirrups 4, the hollow steel pipe is provided with expansion high-strength steel stirrups 3 that penetrate the hollow steel pipe from top to bottom, the top of the expansion high-strength steel stirrups 3 is connected to the junction operation platform 6 by an expansion column anchor 7, and the bottom is fixed to the ground by the expansion column anchor 7.

[0023] The base structure is as follows Figure 4 As shown, it includes foundation concrete 13, foundation concrete pier 12 and bottom plate. The bottom plate is buried in the foundation concrete. The lowest tower section passes through the foundation concrete pier and is inserted into the foundation concrete. It is fixedly connected to the bottom plate by foundation anchor bolts 11.

[0024] The interior of the high-strength steel connection flange is as follows Figure 3 As shown, an expansion column anchor plate 10 is provided, on which a plurality of holes are opened, and the expansion and tension high-strength steel stirrups pass through the holes of the expansion column anchor plate.

[0025] High-strength steel flange connection parts such as Figure 5 and Figure 6As shown, it includes two flanges connected by bolts, a flange connection sealing layer 14 is arranged between the two flanges, flange sealant restraining clamps 17 are sleeved on the outer edges of the two flanges, flange connection peripheral sealant 16 is arranged between the outer edges of the flanges and the flange sealant restraining clamps, flange connection inner pipe sealant 15 is arranged between the tower section and the flange, and flange connection bolt hole sealing gaskets 18 are arranged between the bolts and the flanges.

[0026] The high-strength steel stirrups are composed of several sections of steel bars connected by prestressed steel wire joints 8.

[0027] A specific implementation of the utility model is as follows:

[0028] The method and structure of the utility model are adopted in the lower main pipe of the UHV and ultra-high iron tower. Generally, the four main pipes with the first or second slope change downward from bottom to top adopt the solid structure of high-strength concrete plus high-strength steel pipe. Concrete pouring is generally carried out when the tower column is installed to the operating platform at the junction. The operating platform is the original hollow structure of high-strength steel pipe column above, and the operating platform is the solid structure of high-strength steel hot-dip galvanized steel cable plus C50 or above high-strength concrete and high-strength steel pipe column composite below. The high-strength concrete has a strength of C50 or above and has high fluidity, micro-expansion and self-compacting properties. All flange connections, steel pipe joints and all other gaps need to be sealed with sealants and other sealing materials to ensure that there is no leakage of slurry and water when pouring high-strength concrete. The concrete pouring method adopts the catheter insertion and gradual lifting construction method.

[0029] When pouring anchor cable high-strength concrete, pumped steel pipes are fixed along the tower columns to the operating platform at the junction. When pouring, a guide tube is inserted into the concrete and the height of the concrete pouring is gradually increased. It is generally inserted into the concrete for 0.6-1.2 meters. Since the inner diameter of the steel pipe transmission tower below the slope change is generally not less than 600mm for a tower over 200 meters, the concrete pouring and compaction will not be affected by the diameter and operating space. The steel cable expansion and stirrup fixation are slightly different from ordinary expansion concrete. The expansion anchors, joints, and anchor plates need to be prepared in advance. Special tooling is required for vertical expansion operations at high altitudes.

[0030] Each embodiment in this specification is described in a progressive manner, and the same and similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device embodiment, the above is only a preferred implementation of the utility model. Since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment. The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field is within the technical scope disclosed by the utility model. For ordinary technicians in the technical field, changes or replacements that can be easily thought of should be included in the protection scope of the utility model without departing from the principle of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A high-strength concrete column steel pipe composite structure of an ultra-high voltage steel pipe tower, comprising a base and a tower body fixed on the base, the tower body comprising a plurality of tower sections connected by high-strength steel connecting flanges, characterized in that: The tower section includes an upper middle section and a lower middle section, and an operation platform for a junction is arranged at the connection between the upper middle section and the lower middle section. The lower middle section adopts a high-strength concrete solid structure and a high-strength steel pipe column composite. The high-strength concrete solid structure and the high-strength steel pipe column composite include a hollow steel pipe, and the hollow steel pipe is filled with high-strength self-compacting micro-expansive concrete and high-strength steel stirrups. The hollow steel pipe is provided with expansion-tensioned high-strength steel stirrups that penetrate the hollow steel pipe from top to bottom, and the top of the expansion-tensioned high-strength steel stirrups is connected to the operation platform for the junction through an expansion column anchor, and the bottom is fixed to the ground through the expansion column anchor.

2. The high-strength concrete column steel pipe composite structure of the UHV steel pipe tower according to claim 1 is characterized in that: The base comprises foundation concrete, foundation concrete piers and a bottom plate, the bottom plate is buried in the foundation concrete, the lowest tower section passes through the foundation concrete pier and is inserted into the foundation concrete, and is fixedly connected to the bottom plate by foundation anchor bolts.

3. The high-strength concrete column steel pipe composite structure of the UHV steel pipe tower according to claim 1 is characterized in that: An expansion column anchor plate is arranged inside the high-reinforced high-strength steel connection flange, and a plurality of holes are opened on the expansion column anchor plate, and the expansion and tension high-strength steel stirrups pass through the holes of the expansion column anchor plate.

4. The high-strength concrete column steel pipe composite structure of the UHV steel pipe tower according to claim 1 or 3, characterized in that: The high-ribbed high-strength steel connection flange includes two flanges connected by bolts, a flange connection sealing layer is arranged between the two flanges, flange sealant restraining clamps are sleeved on the outer edges of the two flanges, flange connection peripheral sealant is arranged between the outer edges of the flanges and the flange sealant restraining clamps, flange connection internal pipe sealant is arranged between the tower section and the flange, and flange connection bolt hole sealing gaskets are arranged between the bolts and the flange.

5. The high-strength concrete column steel pipe composite structure of the UHV steel pipe tower according to claim 1 or 3, characterized in that: The high-strength steel stirrups are composed of several sections of steel bars connected by prestressed steel wire joints.

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