Double-pile type foundation reinforcing structure of externally-wrapped bearing platform of power transmission iron tower

Abstract

The utility model relates to the technical field of foundation reinforcement of power transmission towers, in particular to a double-pile type foundation reinforcement structure of a power transmission tower wrapped bearing platform, which comprises the wrapped bearing platform, two short beams and cast-in-place piles, the wrapped bearing platform is wrapped outside an original main column, one ends of the two short beams are respectively connected with the wrapped bearing platform, and the other ends of the two short beams are respectively connected with the cast-in-place piles. The other ends of the two short beams are connected with the two cast-in-place piles respectively, the tail ends of the two cast-in-place piles are installed in soil, and the outer wrapping bearing platform and the two cast-in-place piles are connected through the two short beams to form a foundation reinforcing structure. The structural strength and rigidity of the reinforcing structure are improved through the arrangement of a steel bar framework structure among the externally-wrapped bearing platform, the short beams and the cast-in-place piles, lap joint welding of the short beam main reinforcement bending sections and the bearing platform longitudinal reinforcements, lap joint welding of the short beam main reinforcement bending sections and the main column shear-resisting pieces, lap joint welding of the bearing platform longitudinal reinforcements and the main column shear-resisting pieces and lap joint welding of the short beam main reinforcement bending sections and the cast-in-place pile main reinforcements. Therefore, the technical problem that the bearing capacity of the foundation is insufficient when the concrete of the iron tower foundation is aged, cracked and the like can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of power transmission iron tower foundation reinforcement, in particular to a double-pile foundation reinforcement structure of a power transmission iron tower outer cap. Background Art

[0002] Transmission line towers are mainly assembled into truss structures by steel, steel plates or steel pipe components. Most of the currently operating towers are made of equilateral angle steel and node plates connected by bolts, and some are connected by steel pipe rods, C-shaped or X-shaped joints or flanges. The connection between the tower and the foundation is mostly made of anchor bolts.

[0003] In the field of transmission tower foundation reinforcement technology, tower foundations often age in open air, corrosive foundation environments, and other environments. The foundation concrete becomes loose, easy to fall off, or cracks appear. This phenomenon will cause the tower foundation's bearing capacity to decrease, affecting the safe operation of the transmission line.

[0004] At present, the common reinforcement methods for transmission tower foundations with microcracks or non-stress cracks are increasing the foundation cross-section reinforcement method and replacing concrete reinforcement method. The general increasing the foundation cross-section reinforcement method considers the use of connecting beams between the tower legs, or a single cast-in-place pile, which has a large pile diameter, poor stress performance, and a more complicated construction process; the replacement concrete reinforcement method requires the removal of most of the weakened concrete of the original foundation, requires a support structure, and in most cases requires more excavation, and the construction process is complicated. Utility Model Content

[0005] The utility model aims to provide a double-pile foundation reinforcement structure of an outsourced foundation of a transmission iron tower, which can utilize the original foundation and the original iron tower to improve the bearing capacity of the transmission line foundation and ensure the safe operation of the line structure.

[0006] To achieve the above-mentioned purpose, the utility model relates to a double-pile foundation reinforcement structure of an outsourced cap for a transmission tower, comprising an outsourced cap, two short beams and cast-in-place piles, wherein the outsourced cap is surrounded by the outside of the original main column, one end of the two short beams is respectively connected to the outsourced cap, and the other end of the two short beams is respectively connected to the two cast-in-place piles, the ends of the two cast-in-place piles are installed in the ground, and the outsourced cap and the two cast-in-place piles are connected by two short beams to form a foundation reinforcement structure.

[0007] Preferably, the two short beams are perpendicular to each other and arranged on two adjacent side surfaces of the outer supporting platform.

[0008] Preferably, the external cap is a reinforced concrete structure, including cap main reinforcement, cap steel hoops and cap frame reinforcement. The cap main reinforcement and cap frame reinforcement are arranged parallel to the axis of the original main column, and the cap steel hoops and shear members connect the cap main reinforcement.

[0009] Preferably, each short beam comprises short beam main reinforcement, short beam oblique main reinforcement and short beam steel hoops. The short beam main reinforcement is arranged along the length direction of the connecting beam. The short beam main reinforcement overlaps with the pedestal main reinforcement. The short beam steel hoops connect the short beam main reinforcement. The short beam oblique main reinforcement is arranged at an angle to the short beam main reinforcement at the bottom of the connecting beam.

[0010] Preferably, each of the short beams is a variable-section reinforced concrete structure, which is narrow in the middle and wide on both sides.

[0011] Preferably, the cast-in-place pile is a reinforced concrete structure including pile main reinforcement, pile outer steel hoop, pile inner steel hoop and guard plate. The pile main reinforcement is arranged between the pile outer steel hoop and the pile inner steel hoop along the pile axis direction. The pile main reinforcement is overlapped with the short beam main reinforcement. The pile outer steel hoop is arranged on the outside of the pile main reinforcement, the pile inner steel hoop is arranged on the inside of the pile main reinforcement, and the guard plate is arranged on the outside of the pile outer steel hoop.

[0012] Preferably, the overall structure consisting of the outer cap, two short beams and cast-in-place piles is arranged centrally symmetrically with respect to the center of the transmission tower.

[0013] Beneficial effects of the utility model:

[0014] The utility model provides a transmission tower outer cap double-pile foundation reinforcement structure, which can utilize the original foundation and the original tower structure, and the reinforcement structure is simple in form, simple in construction, and economical, and can share or fully bear the tower foundation force; through the steel skeleton structure of the outer cap, short beam, and cast-in-place piles, and the lap welding connection of the short beam main reinforcement bent section and the cap longitudinal reinforcement, the short beam main reinforcement bent section and the main column shear member, the cap longitudinal reinforcement and the main column shear member, and the short beam main reinforcement bent section and the cast-in-place pile main reinforcement, the strength and rigidity of the reinforcement structure are improved.

[0015] Therefore, the utility model can solve the technical problem of insufficient foundation bearing capacity when the concrete of the iron tower foundation is aged, cracked, etc. on the basis of reusing the old concrete. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the planar structure of the utility model.

[0017] Figure 2 for Figure 1 Schematic diagram of the cross section at 1-1.

[0018] Figure 3 for Figure 1 Schematic diagram of the cross section at 2-2.

[0019] Figure 4 Schematic diagram of the reinforcement of cast-in-place piles and short beams.

[0020] Figure 5 This is a schematic diagram of the top view of the cast-in-place pile section.

[0021] Figure 6 This is a schematic diagram of the reinforcement of the top surface of the external cap.

[0022] Figure 7 for Figure 6 Schematic diagram of the cross section at 3-3.

[0023] Description of reference numerals:

[0024] Original main column 1, external cap 2, short beam 3, cast-in-place pile 4, tower center 5;

[0025] Outer cap 2: cap main reinforcement 13, cap steel hoop 14, shear member 15, cap frame reinforcement 16;

[0026] Short beam 3: short beam main reinforcement 7, short beam inclined main reinforcement 8, short beam steel hoop 6;

[0027] Cast-in-place pile 4: pile main reinforcement 12, pile outer steel hoop 9, pile inner steel hoop 10, guard plate 11. DETAILED DESCRIPTION

[0028] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the present invention are further described below in conjunction with the accompanying drawings and through specific implementation methods. It is understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for the convenience of description, only the parts related to the present invention are shown in the accompanying drawings, rather than all of them.

[0029] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] The utility model mainly develops a double-pile foundation reinforcement structure of an outsourced foundation of a transmission tower, which can be used to solve the technical problems of aging, cracks and the like of the tower foundation concrete and insufficient foundation bearing capacity.

[0032] The utility model provides a double-pile foundation reinforcement structure for an outsourcing foundation of a transmission iron tower. The reinforcement structure, based on the original transmission line iron tower, can improve the stability and reliability of the pile foundation without dismantling the original foundation in case of cracks in the original foundation, loose concrete, powdery state, insufficient strength, etc. The utility model can solve the technical problem of improving the bearing capacity, overall stability and operation safety of the transmission line foundation under the premise of using the original foundation type as a large slab foundation.

[0033] like Figure 1 , Figure 2 , Figure 3 As shown, the utility model relates to a transmission tower outer cap double pile foundation reinforcement structure, including an outer cap 2, two short beams 3 and cast-in-place piles 4, the outer cap 2 is surrounded by the outside of the original main column 1, one end of the two short beams 3 is respectively connected to the outer cap 2, and the other end of the two short beams 3 is respectively connected to the two cast-in-place piles 4, the ends of the cast-in-place piles 4 are installed in the ground, the mutually perpendicular side surfaces of the outer cap 2 are respectively connected to the two mutually perpendicular short beams 3, the outer cap 2, the short beams 3 and the cast-in-place piles 4 form an integral structure and are centrally symmetrically arranged with the center 5 of the transmission tower, as shown in FIG. Figure 1 as shown in .

[0034] The external cap 2 is a reinforced concrete structure with a uniform cross-section and a square cross-section, including cap main reinforcement 13, cap steel hoops 14 and cap frame reinforcement 16. The cap frame reinforcement 16 is arranged along the axis of the original main column 1. The cap main reinforcement 13 is arranged along the axis of the original main column 1. The cap frame reinforcement 16 plays a structural role. The cap steel hoops 14 are used to connect the cap main reinforcement 13. The external cap is surrounded by the original main column and arranged in a concentric circle with the original foundation, which enhances the rigidity of the main column of the foundation. The external cap includes cap main reinforcement, cap steel hoops, cap frame reinforcement and concrete. The cap main reinforcement 13 is mainly used to transfer the axial load of the cap, overlap with the short beam main reinforcement and overlap with the original main column shear member; the cap frame reinforcement 16 is mainly used to meet the structural requirements.

[0035] The short beam 3 is a reinforced concrete structure, including a short beam main reinforcement 7, a short beam oblique main reinforcement 8, and a short beam steel hoop 6. The short beam main reinforcement 7 is arranged along the length direction of the short beam 3. The short beam main reinforcement 7 overlaps with the main reinforcement 13 of the pedestal. The short beam steel hoop 6 is used to connect the short beam main reinforcement 7. The short beam oblique main reinforcement 8 is arranged at the bottom of the connecting beam at an angle with the short beam main reinforcement 7. The short beam 3 is a variable cross-section reinforced concrete structure, which is narrow in the middle and wide on both sides. The short beam is located between the outer pedestal and the cast-in-place pile, and is mainly used to transmit the foundation force of the transmission tower; the short beam includes a short beam main reinforcement, a short beam oblique main reinforcement, a short beam steel hoop and concrete. The bending section of the short beam main reinforcement is overlapped and welded with the main reinforcement of the cast-in-place pile, the main column shear member or the main reinforcement of the pedestal, and its function is to improve the overall integrity of the reinforced structure. The short beam oblique main reinforcement 8 meets the structural requirements and is mainly used for the bending and tension resistance of the short beam; the short beam main reinforcement 7 is mainly used for the bending and tension resistance of the short beam 3.

[0036] The cast-in-place pile 4 is a reinforced concrete structure, including pile main reinforcement 12, pile outer steel hoop 9, pile inner steel hoop 10, and guard plate 11. The pile main reinforcement 12 is arranged between the pile outer steel hoop 9 and the pile inner steel hoop 10 along the pile axis direction. The pile main reinforcement overlaps with the beam main reinforcement 7. The pile outer steel hoop 9 is arranged on the outside of the pile main reinforcement 12, the pile inner steel hoop 10 is arranged on the inside of the pile main reinforcement 12, and the guard plate 11 is arranged on the outside of the pile outer steel hoop 9. The cast-in-place pile is buried in the soil according to a certain diameter and depth to meet the force requirements of the transmission tower, and is mainly used to resist the pull-out or press-down requirements on the transmission tower foundation. The cast-in-place pile is provided with pile main reinforcement, pile outer steel hoop, pile inner steel hoop, guard plate and concrete, and ensures that the cast-in-place pile maintains a certain diameter and depth to ensure that the reinforced structure has the corresponding bearing capacity. The pile main reinforcement 12 mainly bears the pile foundation tension, and the guard plate 11 is mainly used to ensure the verticality of the pile construction.

[0037] The overall structure formed by the outer cap 2, the short beam 3 and the cast-in-place pile 4 is arranged in a central symmetric manner with the center 5 of the tower.

[0038] The external cap, short beams, cast-in-place piles and original main columns form a unified overall structure through a steel skeleton, shear-resistant members and concrete, thereby enhancing the bearing capacity of the original foundation.

[0039] The construction process of the reinforcement structure is as follows:

[0040] (1) Remove the aging concrete on the original foundation surface and clean the surface with a high-pressure water gun;

[0041] (2) Drill holes on the surface of the original main column, insert shear members and fix them;

[0042] (3) Outsourced construction of foundation piles;

[0043] (4) Construction of cast-in-place piles;

[0044] (5) Construction of short beams;

[0045] (6) After concrete pouring, cure for 14 days.

[0046] The above-mentioned embodiment only expresses one implementation method of the utility model, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A double-pile foundation reinforcement structure for an outsourced cap of a transmission tower, characterized in that: It comprises an external cap (2), two short beams (3) and cast-in-place piles (4), wherein the external cap (2) surrounds the outside of the original main column (1), one end of the two short beams (3) are respectively connected to the external cap (2), and the other ends of the two short beams (3) are respectively connected to the two cast-in-place piles (4), the ends of the two cast-in-place piles (4) are installed in the ground, and the external cap (2) and the two cast-in-place piles (4) are connected through the two short beams (3) to form a foundation reinforcement structure; The two short beams (3) are perpendicular to each other and are arranged on two adjacent side surfaces of the outer capping platform (2); Each short beam (3) comprises a short beam main reinforcement (7), a short beam oblique main reinforcement (8), and a short beam steel hoop (6); the short beam main reinforcement (7) is arranged along the length direction of the short beam (3); the short beam main reinforcement (7) is overlapped with the main reinforcement of the outer cap (2); and the short beam steel hoop (6) connects the short beam main reinforcement (7).

2. A double-pile foundation reinforcement structure for an outsourced cap of a transmission tower according to claim 1, characterized in that: The outer cap (2) includes cap main reinforcement (13), cap steel hoops (14), shear members (15) and cap frame reinforcement (16). The cap main reinforcement (13) and cap frame reinforcement (16) are arranged in parallel along the axis of the original main column (1). The cap steel hoops (14) and shear members (15) connect the cap main reinforcement (13).

3. A double-pile foundation reinforcement structure for an outer cap of a transmission tower according to claim 2, characterized in that: The short beam oblique main reinforcement (8) is arranged at an angle to the short beam main reinforcement (7) at the bottom of the short beam.

4. A double-pile foundation reinforcement structure for an outer cap of a transmission tower according to claim 3, characterized in that: The cast-in-place pile (4) comprises a pile main reinforcement (12), an outer pile steel hoop (9), an inner pile steel hoop (10), and a guard plate (11); the pile main reinforcement (12) is arranged between the outer pile steel hoop (9) and the inner pile steel hoop (10), and is arranged longitudinally along the length direction of the pile; the pile main reinforcement (12) overlaps with the short beam main reinforcement (7); the outer pile steel hoop (9) is arranged on the outer side of the pile main reinforcement (12); the inner pile steel hoop (10) is arranged on the inner side of the pile main reinforcement (12); and the guard plate (11) is arranged on the outer side of the outer pile steel hoop (9).

5. The double-pile foundation reinforcement structure of the transmission tower outer cap according to claim 4 is characterized in that: The outer capping platform (2) is a reinforced concrete structure with a uniform cross-section and a square cross-section.

6. A double-pile foundation reinforcement structure for an outer cap of a transmission tower according to claim 5, characterized in that: Each short beam (3) is a variable-section reinforced concrete structure, narrow in the middle and wide on both sides.

7. A double-pile foundation reinforcement structure for an outer cap of a transmission tower according to any one of claims 1 to 6, characterized in that: The overall structure formed by the outer capping platform (2), the two short beams (3) and the cast-in-place piles (4) is arranged in a centrally symmetrical manner with the center (5) of the transmission tower.

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