Transmission tower coupling beam cast-in-place pile type foundation reinforcing structure
By adopting a pile-in-built reinforcement structure on the basis of the transmission tower, the problem of weakening of the strength of the transmission tower foundation after long-term operation is solved, and the effect of improving the bearing capacity and stability of the foundation is achieved, and it is suitable for various maintenance and reinforcement scenarios.
Patent Information
- Application Number
- CN202420037758.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-05
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-01-05
AI Technical Summary
After long-term operation, the foundation of the transmission tower is susceptible to open-air wild environment, external mechanical damage, environmental corrosion and rust, concrete carbonization, etc., resulting in weakening or degradation of the foundation concrete strength, reducing the bearing capacity of the transmission tower foundation, and increasing structural damage and safety hazards.
The reinforced foundation structure of the connected beam cast-injected pile is adopted, including the outsourcing bearing, the connected beam and the cast-injected pile. These components form an integral reinforced structure to enhance the rigidity and stability of the foundation, and can strengthen the original foundation without removing the original foundation and the upper transmission tower structure.
This reinforced structure can effectively improve the basic bearing capacity, overall stability and operation safety of transmission lines, convenient construction, low investment cost, and can be reinforced without affecting the operation of transmission lines.
Smart Images
Figure CN222782444U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of power transmission iron tower foundation reinforcement, in particular to a power transmission iron tower coupling beam cast-in-place pile type foundation reinforcement structure. Background Art
[0002] As an important part of the power transmission system, the safety and health of transmission towers and basic support systems throughout their life cycle is crucial. With the continuous development of power grid construction, transmission lines have gradually entered the transition stage of maintenance of in-service transmission towers from large-scale investment in construction. According to incomplete statistics, about 25% to 30% of my country's transmission lines are currently in service for more than 30 years, and some lines are in urgent need of maintenance and renovation and reinforcement.
[0003] In the field of transmission tower foundation reinforcement technology, due to the long operation time of some transmission lines and the complex geological and hydrological conditions, the tower foundation is easily affected by the open field environment, external mechanical damage, environmental corrosion and rust, concrete carbonization, etc., and the tower foundation is exposed to the sun, soaked for a long time, etc., and the foundation concrete shows weakening or degradation during service (such as loosening, powder or cracking of the foundation concrete, etc.), which reduces the bearing capacity of the transmission tower foundation, easily aggravates the damage of the tower structure, and even causes the tower to fall, affecting the safe operation of the transmission line. At present, the common reinforcement methods for the transmission tower foundation are the reinforcement method of increasing the foundation section, the reinforcement method of replacing concrete, the reinforcement method of planting steel bars to strengthen the extension of the tower foot plate, and the foundation reinforcement method. Among them, the method of increasing the foundation section and the method of replacing concrete reinforcement are mainly applicable to the situation where the foundation concrete has local cracks or low local strength, and are mainly used to deal with minor cracks and non-stress cracks; the method of reinforcing and extending the tower foot plate is mainly applicable to the situation where the foundation column is damaged or a small amount of the column is missing or exposed. It requires the addition of steel bars or anchor bolts, has high welding requirements, and the process is relatively complex; the foundation reinforcement method is mainly used for tower foundation conditions with weak foundations or foundation water with adverse effects such as corrosion. It usually adopts foundation replacement or replacement, grouting, etc., and its cost is relatively high. The above methods are generally not applicable to the situation where the overall concrete strength of the foundation is too low, and the bearing capacity and durability seriously fail to meet the requirements of the design regulations. Utility Model Content
[0004] The utility model aims to provide a transmission iron tower connecting beam cast-in-place pile foundation reinforcement structure, which can fully utilize the original foundation type as a large slab foundation to improve the technical problems of the transmission line foundation bearing capacity, overall stability and operation safety.
[0005] To achieve the above-mentioned purpose, the utility model relates to a transmission tower connecting beam cast-in-place pile foundation reinforcement structure, comprising an outer cap, a connecting beam and cast-in-place piles, wherein the outer cap is surrounded by the outside of the original main column, the two ends of the connecting beam are respectively connected to the outer cap and the cast-in-place piles, the ends of the cast-in-place piles are installed in the ground, and the outer cap and the cast-in-place piles form an integral reinforcement structure through the connecting beam.
[0006] As a preferred solution, 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 in parallel along the height direction of the original main column, and the cap steel hoops connect the cap main reinforcement.
[0007] As a preferred solution, the connecting beam includes main beam reinforcement, oblique main reinforcement, and beam steel hoops. The main beam reinforcement is arranged along the length direction of the connecting beam, the main beam reinforcement overlaps the main reinforcement of the pedestal, the beam steel hoops connect the main beam reinforcement, and the oblique main reinforcement is arranged at an angle to the main beam reinforcement at the bottom of the connecting beam.
[0008] As a preferred solution, the coupling beam is a variable-section reinforced concrete structure, which is narrow in the middle and wide on both sides.
[0009] As a preferred embodiment, the cast-in-place pile is a reinforced concrete structure including pile main reinforcement, pile outer steel hoops, pile inner steel hoops, and guard plates. The pile main reinforcement is arranged between the pile outer steel hoops and the pile inner steel hoops along the pile length direction. The pile main reinforcement overlaps the beam main reinforcement. The pile outer steel hoops are arranged on the outside of the pile main reinforcement, the pile inner steel hoops are arranged on the inside of the pile main reinforcement, and the guard plates are arranged on the outside of the pile outer steel hoops.
[0010] As a preferred solution, the external capping platform and the connecting beam are symmetrically arranged along the line connecting the center of the original main column and the center of the transmission tower.
[0011] As a preferred solution, there are two cast-in-place piles, which are symmetrically arranged at both ends of the connecting beam.
[0012] As a preferred solution, the original main column, external cap, connecting beam and cast-in-place piles are formed into a whole which is centrally symmetrically arranged around the center of the transmission tower.
[0013] Beneficial effects of the utility model:
[0014] The utility model provides a transmission iron tower connecting beam cast-in-place pile type foundation reinforcement structure, which can reinforce the original foundation without dismantling the original foundation and the upper transmission tower structure. The reinforcement structure has good rigidity, can share or fully bear the force of the iron tower foundation, is convenient to construct, and can effectively save investment costs. Through the steel skeleton structure of the outsourced cap, connecting beam, and cast-in-place pile, and the lap welding of the bending section of the main reinforcement of the connecting beam and the longitudinal reinforcement of the cap, the bending section of the main reinforcement of the connecting beam and the shear member of the main column, the longitudinal reinforcement of the cap and the shear member of the main column, and the bending section of the main reinforcement of the connecting beam and the main reinforcement of the cast-in-place pile, the integrity and structural strength of the reinforcement structure are greatly improved, so that the force in the reinforced foundation can be smoothly transmitted to the reinforcement structure.
[0015] Therefore, 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 utilizing the original foundation type as the large slab foundation. 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 Schematic diagram of the reinforcement of cast-in-place piles and connecting beams.
[0019] Figure 4 This is a top view of the cast-in-place pile.
[0020] Figure 5 This is a schematic diagram of the reinforcement of the top surface of the external cap.
[0021] Figure 6 for Figure 5 Schematic diagram of the cross section at 4-4.
[0022] Description of reference numerals:
[0023] Cast-in-place piles 11, connecting beams 12, external caps 13, original main columns 14, transmission tower center 15;
[0024] Cast-in-place pile 11: pile main reinforcement 1, pile outer steel hoop 2, pile inner steel hoop 3, guard plate 4;
[0025] Coupling beam 12: beam main reinforcement 7, inclined main reinforcement 5, beam steel hoop 6;
[0026] Outer cap 13: cap steel hoops 8, cap main reinforcement 9, cap frame reinforcement 10. DETAILED DESCRIPTION
[0027] 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.
[0028] 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.
[0029] 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.
[0030] The utility model mainly develops a reinforcement method for in-service tower foundations with stress cracks or low overall strength of foundation concrete, which can be widely used in various maintenance and reinforcement scenarios of power outages and non-power outages of transmission lines.
[0031] The utility model provides a transmission iron tower connecting beam cast-in-place pile foundation reinforcement structure, which, based on the original transmission line iron tower foundation, can improve the pile foundation stability and reliability without dismantling the original foundation in case of cracks in the original foundation, loose concrete, powder 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.
[0032] like Figure 1 , Figure 2As shown, the utility model relates to a transmission tower connecting beam cast-in-place pile foundation reinforcement structure, comprising an outer cap 13, a connecting beam 12 and a cast-in-place pile 11, wherein the outer cap 13 surrounds the outside of the original main column 14, and the two ends of the connecting beam 12 are respectively connected to the outer cap 13 and the cast-in-place pile 11, and the end of the cast-in-place pile 11 is installed in the ground, and the outer cap 13 and the cast-in-place pile 11 form an integral reinforcement structure through the connecting beam 12. The line connecting the center of the original main column 14 and the center 15 of the transmission tower is the center direction of the tower, as shown in FIG. Figure 1 Indicated by the arrow.
[0033] The outer cap 13 is a reinforced concrete structure, including cap main reinforcement 9, cap steel hoop 8 and cap frame reinforcement 10. The cap frame reinforcement 10 is arranged along the height direction of the original main column 14. The cap main reinforcement 9 is arranged along the height direction of the original main column 14. The cap frame reinforcement 10 plays a structural role. The cap steel hoop 8 is used to connect the cap main reinforcement 9. The outer cap is surrounded by the original main column and arranged concentrically with the original foundation. It is used to increase the cross-sectional area of the foundation main column and improve the rigidity and stability of the foundation main column; the outer cap is placed in the outermost layer of the original main column, which plays the role of increasing the foundation cross-sectional area and enhancing the rigidity of the foundation main column. The outer cap includes cap main reinforcement, cap steel hoop, cap frame reinforcement and concrete. The cap main reinforcement 9 is mainly used for the cap to transfer axial loads, overlap with the main reinforcement of the connecting beam and overlap with the shear member of the original main column; the cap frame reinforcement 10 is used to meet the structural requirements.
[0034] The connecting beam 12 is a reinforced concrete structure. The connecting beam 12 is in the shape of a long strip, and crosses the outer cap 13 and the original main column 14 in the middle. The connecting beam 12 includes beam main reinforcement 7, inclined main reinforcement 5, and beam steel hoop 6. The beam main reinforcement 7 is arranged along the length direction of the connecting beam 12. The beam main reinforcement 7 overlaps with the cap main reinforcement 9. The beam steel hoop 6 is used to connect the beam main reinforcement 7. The inclined main reinforcement 5 is arranged at an angle with the beam main reinforcement 7 at the bottom of the connecting beam. The connecting beam 12 is a variable-section reinforced concrete structure, which is narrow in the middle and wide on both sides. The connecting beam is located between the outer cap and the cast-in-place pile, and is mainly used to transfer the foundation force of the transmission tower and enhance the foundation stiffness; the connecting beam is connected to the outer cap and the cast-in-place pile, and plays the function of transferring the foundation force of the transmission tower, and transfers the foundation force of the transmission tower to the cast-in-place pile through the connecting beam. The coupling beam includes beam main reinforcement, inclined main reinforcement, beam web reinforcement, beam frame reinforcement, beam steel hoop and concrete. The bending section of the coupling beam main reinforcement is lap-welded with the main reinforcement of the cast-in-place pile, the main column shear member or the main reinforcement of the pedestal. Its function is to improve the overall integrity of the reinforced structure, thereby greatly improving the load transfer capacity of the reinforced structure. The inclined main reinforcement 5 meets the structural requirements and is mainly used for the bending and tension resistance of the coupling beam; the beam main reinforcement 7 is mainly used for the bending and tension resistance of the coupling beam 12; the coupling beam 12 is a variable-section reinforced concrete structure, which is narrow in the middle and wide on both sides, and has better bearing capacity and stability.
[0035] The cast-in-place pile 11 is a reinforced concrete structure, including a pile main bar 1, a pile outer steel hoop 2, a pile inner steel hoop 3, and a guard plate 4. The pile main bar 1 is arranged between the pile outer steel hoop 2 and the pile inner steel hoop 3 along the length direction of the pile. The pile main bar overlaps with the beam main bar 7. The pile outer steel hoop 2 is arranged on the outside of the pile main bar 1, the pile inner steel hoop 3 is arranged on the inside of the pile main bar 1, and the guard plate 4 is arranged on the outside of the pile outer steel hoop 2. 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 mainly used to share or fully bear the foundation force of the transmission tower. The outer cap and the cast-in-place pile form a whole through the connecting beam, which improves the bearing capacity and stability of the original foundation. The cast-in-place pile is provided with a pile main bar, a pile outer steel hoop, a pile inner steel hoop, a 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 and stability. The main reinforcement 1 of the pile mainly bears the tension of the pile foundation, and the guard plate 4 is mainly used to ensure the verticality of the pile construction.
[0036] The outer cap 13 and the connecting beam 12 are symmetrically arranged along the line connecting the center of the original main column 14 and the center of the transmission tower 15. There are two cast-in-place piles 11, which are symmetrically arranged at both ends of the connecting beam 12. The original main column 14, the outer cap 13, the connecting beam 12, and the cast-in-place piles 11 form a total of four units, which are symmetrically arranged around the center 15 of the transmission tower.
[0037] The outer cap, connecting beam, cast-in-place piles and original main column form a unified overall structure through a steel skeleton, shear members and concrete, which greatly enhances the bearing capacity of the original foundation and improves the safe operation capacity of the line.
[0038] The construction process of the reinforcement structure is as follows:
[0039] (1) Remove the loose and powdery concrete on the original foundation surface, clean the surface with a high-pressure water gun, remove part of the surface, and apply the interface agent;
[0040] (2) Drill holes on the surface of the original main column and insert shear members;
[0041] (3) and press the structural adhesive into the pores;
[0042] (4) Outsourcing of construction foundation;
[0043] (5) Construction of cast-in-place piles;
[0044] (6) Construction of connecting beams;
[0045] (7) After the concrete is poured, it is cured for 14 days to complete the reinforcement structure.
[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 transmission tower connecting beam cast-in-place pile foundation reinforcement structure, characterized in that: It comprises an external cap (13), a connecting beam (12) and a cast-in-place pile (11), wherein the external cap (13) surrounds the outside of the original main column (14), the two ends of the connecting beam (12) are respectively connected to the external cap (13) and the cast-in-place pile (11), the end of the cast-in-place pile (11) is installed in the soil, and the external cap (13) and the cast-in-place pile (11) form an integral reinforcement structure through the connecting beam (12); The cast-in-place pile (11) comprises a pile main reinforcement (1), an outer pile steel hoop (2), an inner pile steel hoop (3), and a guard plate (4); the pile main reinforcement (1) is arranged between the outer pile steel hoop (2) and the inner pile steel hoop (3), and is arranged longitudinally along the length direction of the pile; the pile main reinforcement (1) overlaps one end of the main reinforcement of the connecting beam (12); the outer pile steel hoop (2) is arranged on the outer side of the pile main reinforcement (1); the inner pile steel hoop (3) is arranged on the inner side of the pile main reinforcement (1); and the guard plate (4) is arranged on the outer side of the outer pile steel hoop (2); The other end of the main reinforcement of the coupling beam (12) is overlapped with the main reinforcement of the external capping platform (13).
2. A transmission tower connecting beam cast-in-place pile foundation reinforcement structure according to claim 1, characterized in that: The outer cap (13) includes cap main reinforcement (9), cap steel hoops (8) and cap frame reinforcement (10). The cap main reinforcement (9) and cap frame reinforcement (10) are arranged in parallel along the height direction of the original main column (14), and the cap steel hoops (8) connect the cap main reinforcement (9).
3. A transmission tower connecting beam cast-in-place pile foundation reinforcement structure according to claim 2, characterized in that: The coupling beam (12) comprises beam main reinforcement (7), oblique main reinforcement (5), and beam steel hoops (6); the beam main reinforcement (7) is arranged along the length direction of the coupling beam (12); the beam main reinforcement (7) overlaps with the main reinforcement of the pedestal (9); the beam steel hoops (6) connect the beam main reinforcement (7); and the oblique main reinforcement (5) is arranged at an angle with the beam main reinforcement (7) at the bottom of the coupling beam.
4. A transmission tower connecting beam cast-in-place pile foundation reinforcement structure according to claim 3, characterized in that: The coupling beam (12) is a variable-section reinforced concrete structure, which is narrow in the middle and wide at both sides.
5. A transmission tower coupling beam cast-in-place pile foundation reinforcement structure according to any one of claims 1 to 4, characterized in that: The outer capping platform (13), the connecting beam (12), and the cast-in-place pile (11) are symmetrically arranged along the line connecting the center of the original main column (14) and the center of the transmission iron tower (15).
6. A transmission tower coupling beam cast-in-place pile foundation reinforcement structure according to claim 5, characterized in that: The integral structure formed by the original main column (14), the external capping platform (13), the connecting beam (12) and the cast-in-place pile (11) is arranged in a centrally symmetrical manner around the center (15) of the transmission iron tower.