Frame structure and method for reinforcing a frame structure

Abstract

This invention relates to the field of structural engineering technology and discloses a frame structure and a method for reinforcing the frame structure. The frame structure includes a dynamic foundation, a static foundation, a frame, a first force-guiding member, and a second force-guiding member. The dynamic foundation is set on the ground, and multiple static foundations are arranged at intervals along the outer perimeter of the dynamic foundation. The frame is fixed to the multiple static foundations. At least one first force-guiding member is provided and located on the left and / or right side of the dynamic foundation. The two ends of each first force-guiding member are respectively connected to two adjacent static foundations, and each first force-guiding member is arranged at intervals from the dynamic foundation. At least one second force-guiding member is provided and located on the front and / or rear side of the dynamic foundation. One end of each second force-guiding member is connected to the static foundation, and the other end is arranged at intervals from the dynamic foundation. This invention eliminates the need for large-scale excavation or construction of new piles at the bottom of the pile foundation, simplifying construction, shortening the modification cycle, and allowing for modification without interrupting power plant operation.

Description

Technical Field

[0001] This invention relates to the field of structural engineering technology, and in particular to a frame structure and a method for reinforcing a frame structure. Background Technology

[0002] The main building area of ​​the thermal power plant includes boiler supports, electrostatic precipitator supports, front flue gas supports, and rear flue gas supports. The front flue gas supports are located between the boiler supports and the electrostatic precipitator supports, supporting and fixing the exhaust gas pipeline. The exhaust gas pipeline connects the boiler and the electrostatic precipitator. A blower connected to the exhaust gas pipeline is installed within the front flue gas supports, supplying air into the pipeline to increase airflow velocity and facilitate the smooth flow of high-temperature exhaust gas carrying dust to the electrostatic precipitator. The rear flue gas supports are located on the outlet side of the electrostatic precipitator, supporting and fixing the clean flue gas pipeline. The clean flue gas pipeline connects the electrostatic precipitator and the chimney. An induced draft fan is installed within the rear flue gas supports, connected to the clean flue gas pipeline. The induced draft fan draws gas from the clean flue gas pipeline, allowing it to be smoothly discharged into the atmosphere through the chimney. In the existing technology, both the front flue support and the rear flue support adopt a multi-layer frame structure without external walls. The ground floor of each multi-layer frame structure is equipped with a power foundation, which is used to support the blower or induced draft fan.

[0003] Currently, noise control in power plants is becoming increasingly stringent. Some power plants already in operation are required to add noise-reducing exterior walls around the existing front and rear flue gas duct supports to block fan noise and meet power plant noise emission requirements. The installation of these noise-reducing exterior walls increases the windward area of ​​the frame structure. When wind loads act on these walls, they generate significant horizontal thrust on the frame structure. This thrust is transmitted through the frame columns to the pile foundations at the column bases, causing the load on the pile foundations to exceed the original design bearing capacity limit, potentially leading to pile foundation failure and other safety issues. To address this problem of insufficient foundation bearing capacity, existing technologies typically involve reinforcing the pile foundations to improve their bearing capacity.

[0004] Chinese invention patent CN112921962A discloses a method for reinforcing pile foundations. During construction, a foundation pit is first excavated at the bottom of the pile foundation cap, creating a construction space between the bottom of the pit and the lower surface of the pile foundation cap. Then, reinforcing piles are driven around the existing piles within the pit, ensuring they are embedded in the soil at the bottom of the pit with their tops higher than the pit bottom. A reinforcing slab is then poured within the construction space, fixedly connected to the existing piles and the reinforcing piles, with the pile foundation cap supported on the slab. Finally, the pit is backfilled. However, a large number of pipelines are buried in the soil beneath the pile foundation cap, making excavation operations highly susceptible to severing these pipelines, potentially leading to power plant shutdowns or even power outages. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that the existing pile foundation reinforcement method for frame structures requires excavation to form a foundation pit at the bottom of the pile foundation cap. However, a large number of pipelines are buried in the soil layer below the pile foundation cap. The excavation operation is very likely to break the pipelines, which may lead to the power plant stopping operation or even power outage.

[0006] To address the aforementioned technical problems, the present invention provides a framework structure, comprising: The power foundation, set on the ground, is used to support the induced draft fan / forced draft fan; The static foundation consists of multiple foundations, all of which are located on the ground. These static foundations are arranged at intervals around the periphery of the dynamic foundation. The frame, fixed to multiple static foundations, is used to secure the pipelines. The first force guiding element is provided at least one and is located on the left and / or right side of the power base; Each first force guide member is connected to two adjacent static foundations at both ends, and each first force guide member is arranged at intervals from the dynamic foundation. The second force guide is provided at least one and is respectively located on the front side and / or rear side of the power base; Each second force guide component is connected to a static foundation at one end and arranged at intervals with the dynamic foundation at the other end. A static foundation can be displaced left or right under force so that the first force guiding member abuts against the dynamic foundation, or a static foundation can be displaced forward or backward under force so that the second force guiding member abuts against the dynamic foundation.

[0007] Preferably, the first force guiding element is a first connecting beam; The first connecting beam extends in the front-to-back direction, and its two ends are connected to two adjacent static foundations respectively. The sides of the first connecting beam are arranged at intervals with the dynamic foundations.

[0008] Preferably, the second force guiding element is a second connecting beam, which extends in the front-to-back direction. One end of the second connecting beam is fixed to the top surface of the static foundation, and the other end of the second connecting beam is arranged at intervals with the dynamic foundation.

[0009] Preferably, the interval between the first force guide and the dynamic foundation, and the interval between the second force guide and the dynamic foundation, are both less than or equal to the horizontal displacement limit of the static foundation.

[0010] Preferably, buffer plates are provided in the interval between the first force guide and the power base, and in the interval between the second force guide and the power base, and the buffer plates are fixed to the power base.

[0011] Preferably, the frame includes frame columns and frame beams; There are multiple frame columns, each corresponding to a static foundation. Each frame column is fixed to a static foundation, and at least one frame beam is fixedly connected between adjacent frame columns.

[0012] This invention provides a method for reinforcing a frame structure, comprising the following steps: S1, Construction dynamic foundation, static foundation and frame; S2. Excavate the soil layer between the dynamic foundation and the static foundation downwards to expose the dynamic foundation and the static foundation; S3. Install the first force guide on the left and / or right side of the power foundation; S4. Install a second force guide on the front and / or rear side of the power foundation; S5, Backfill soil layer.

[0013] Preferably, in step S3, a first force guiding element is provided on the left and / or right side of the power foundation, including: First, compact the soil layer at the bottom of the area where the first connecting beam is to be laid. Then, insert the first anchor bars into the static foundation at both ends of the first connecting beam. Finally, place the first connecting beam on the compacted soil layer and fix the ends of the first connecting beam to the first anchor bars. The first force guiding element and / or the second force guiding element is the first connecting beam. Preferably, in step S4, a second force guide is provided on the front and / or rear side of the power base, including: First, compact the soil layer at the bottom of the area where the second connecting beam is laid. Then, insert the second anchor bar on the top surface of the static foundation at the end of the second connecting beam. Finally, erect the second connecting beam on the top surface of the static foundation and the compacted soil layer, and fix the end of the second connecting beam to the second anchor bar.

[0014] Compared with the prior art, the frame structure and its reinforcement method according to embodiments of the present invention have the following advantages: An embodiment of the present invention provides a frame structure in which a first force guide 5 or a second force guide 6 is fixed on a static foundation 2 on the side of a dynamic foundation 1, and the first force guide 5 or the second force guide 6 is arranged at intervals from the dynamic foundation 1. Under normal operating conditions, the first guide member 5 or the second guide member 6 remains separated from the side wall of the dynamic foundation 1, preserving the relative displacement space between them. This prevents the vibration generated by the wind turbine on the dynamic foundation 1 from being transmitted to the frame 4 and the pipeline system. When the wind load acts on the noise reduction wall 12, the horizontal thrust generated by the wind load is transmitted to the static foundation 2 through the frame 4, causing lateral displacement of the static foundation 2. The first guide member 5 or the second guide member 6 moves synchronously with the static foundation 2 and abuts against the side wall of the dynamic foundation 1, diverting part of the horizontal load to the dynamic foundation 1 to share the load. This effectively reduces the stress on the static foundation 2, ensuring that the load borne by the static foundation 2 is always less than the original design bearing capacity limit. The bearing requirements after the addition of the noise reduction wall can be met without reinforcing the static foundation 2. At the same time, it fundamentally avoids the risk of damaging underground pipelines and causing power plant shutdowns caused by traditional pile foundation reinforcement excavation operations.

[0015] In a method for reinforcing a frame structure according to an embodiment of the present invention, the soil excavation in step S2 only requires excavating the shallow soil layer between the dynamic foundation 1 and the static foundation 2 to expose the dynamic foundation 1 and the static foundation 2. The work area avoids the dense pipelines at the bottom of the static foundation 2, and the excavation depth and range are controllable, reducing the probability of damage to underground pipelines. The modification can be carried out without interrupting power plant production. Moreover, in steps S3 and S4, first force guides 5 are set on the left and right sides of the dynamic foundation 1, and second force guides 6 are set on the front and rear sides. When wind load is applied to the noise reduction wall 12, the horizontal thrust generated by the wind load is transmitted to the static foundation 2 through the frame 4, causing the static foundation 2 to undergo lateral displacement. The force guides move synchronously with the static foundation 2 and abut against the side wall of the dynamic foundation 1, diverting part of the horizontal load to the dynamic foundation 1 to share the load, effectively reducing the stress on the static foundation 2, so that the load borne by the static foundation 2 is always less than the original design bearing capacity limit, meeting the bearing requirements of the static foundation after the addition of the noise reduction wall 12.

[0016] Compared with existing pile foundation reinforcement methods, the reinforcement method of this invention relies only on existing foundation components and does not require large-scale excavation or construction of new piles at the bottom of the pile cap. The construction process is simple, the renovation cycle is short, and the renovation can be carried out without interrupting power plant production. The project cost is lower than that of traditional pile foundation reinforcement schemes. Attached Figure Description

[0017] Figure 1 This is a plan view of the frame structure of an embodiment of the present invention; Figure 2 This is a basic plan view of the frame structure of an embodiment of the present invention; Figure 3 This is an embodiment of the present invention. Figure 2 Section 1-1; Figure 4 This is an embodiment of the present invention. Figure 2 Section 2-2; Figure 5 This is an embodiment of the present invention. Figure 2 Section 3-3; Figure 6 This is an embodiment of the present invention. Figure 2 Section 4-4.

[0018] In the diagram, 1. Dynamic foundation; 2. Static foundation; 21. Pile cap; 22. Pile body; 3. Foundation connecting beam; 4. Frame; 41. Frame column; 5. First force guiding component; 6. Second force guiding component; 7. Buffer plate; 8. First connecting beam; 9. Second connecting beam; 10. Equipment foundation; 11. Existing exterior wall; 12. Noise reduction partition wall; 13. Second anchor bar. Detailed Implementation

[0019] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0020] In the description of this invention, it should be understood that the terms "upper", "lower", "vertical", "horizontal", "bottom", "inner", "outer" and other terms used in this invention to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0021] It should be understood that the terms "first," "second," etc., are used in this invention to describe various types of information, but these terms are not limited to them; they are only used to distinguish information of the same type from one another. For example, without departing from the scope of this invention, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] like Figures 1 to 6As shown, a preferred embodiment of the frame structure of the present invention includes a dynamic foundation 1, a static foundation 2, a frame 4, a first force-guiding component 5, and a second force-guiding component 6. The dynamic foundation 1 is disposed on the ground and is used to support the induced draft fan / forced draft fan. Multiple static foundations 2 are provided, all disposed on the ground, and are arranged at intervals around the outer perimeter of the dynamic foundation 1. In this embodiment of the invention, both the dynamic foundation 1 and the static foundation 2 are pile foundations. The dynamic foundation 1 is designed to consider dynamic loads such as vibrations from the induced draft fan / forced draft fan, while the static foundation 2 is designed to consider only static loads. The frame 4 is fixed to multiple static foundations 2 for fixing pipelines; at least one first force guide 5 is provided and is located on the left and / or right side of the dynamic foundation 1, and the two ends of each first force guide 5 are respectively connected to two adjacent static foundations 2, and each first force guide 5 is arranged at intervals from the dynamic foundation 1; at least one second force guide 6 is provided and is respectively located on the front and / or rear side of the dynamic foundation 1, one end of each second force guide 6 is connected to the static foundation 2, and the other end is arranged at intervals from the dynamic foundation 1; the static foundation 2 can be displaced left and right under force so that the first force guide 5 abuts against the dynamic foundation 1, or the static foundation 2 can be displaced back and forth under force so that the second force guide 6 abuts against the dynamic foundation 1.

[0024] like Figure 1 As shown, in this embodiment of the invention, the frame 4 on the left side of the power foundation 1 is connected to other frame structures. Therefore, the frame 4 on the left side of the power foundation 1 is located indoors, and the wind load on the left side can be ignored. The noise-reducing exterior wall 12 on the right side of the power foundation 1 along axis 20 is part of the exterior wall of the frame 4 and is frequently subjected to wind loads. Therefore, in this embodiment of the invention, the first force guide 5 is only provided on the right side of the power foundation 1. At the same time, the noise-reducing exterior wall 12 on the front side of the power foundation 1 along axis H2 and the existing exterior wall 11 on the rear side of the power foundation 1 are both exterior walls of the frame 4 and are frequently subjected to wind loads applied in the front-to-back direction. Therefore, in this embodiment of the invention, the second force guide 6 is provided on both the front and rear sides of the power foundation 1. In this embodiment of the invention, as shown... Figure 2 As shown, a foundation connecting beam 3 connects adjacent static foundations 2, and the existing exterior wall 11 and noise reduction exterior wall 12 are both built on the foundation connecting beam 3.

[0025] The frame structure of this invention includes a first force guide 5 or a second force guide 6 fixed on a static foundation 2 on the side of the power foundation 1, with the first force guide 5 or the second force guide 6 arranged at intervals from the power foundation 1. Under normal operating conditions, the first guide member 5 or the second guide member 6 remains separated from the side wall of the dynamic foundation 1, preserving the relative displacement space between them. This prevents the vibration generated by the wind turbine on the dynamic foundation 1 from being transmitted to the frame 4 and the pipeline system. When the wind load acts on the noise reduction wall 12, the horizontal thrust generated by the wind load is transmitted to the static foundation 2 through the frame 4, causing lateral displacement of the static foundation 2. The first guide member 5 or the second guide member 6 moves synchronously with the static foundation 2 and abuts against the side wall of the dynamic foundation 1, diverting part of the horizontal load to the dynamic foundation 1 to share the load. This effectively reduces the stress on the static foundation 2, ensuring that the load borne by the static foundation 2 is always less than the original design bearing capacity limit. The bearing requirements after the addition of the noise reduction wall can be met without reinforcing the static foundation 2. At the same time, it fundamentally avoids the risk of damaging underground pipelines and causing power plant shutdowns caused by traditional pile foundation reinforcement excavation operations.

[0026] It should be noted that the design of the power foundation 1 mainly focuses on vertical load as the controlling factor, and its horizontal bearing capacity has a large margin. After the addition of the noise reduction wall 12, the horizontal load transmitted to the power foundation 1 by the first force guide 5 or the second force guide 6 is much smaller than its horizontal bearing capacity. Therefore, the horizontal force transmitted to the power foundation 1 will not have an adverse effect on the safety of the power foundation 1.

[0027] Furthermore, such as Figures 2 to 4 As shown, the first force guiding member 5 is a first connecting beam 8, which extends in the front-to-back direction. The two ends of the first connecting beam 8 are respectively connected to two adjacent static foundations 2. The side of the first connecting beam 8 is spaced apart from the dynamic foundation 1. In this embodiment of the invention, the static foundation 2 includes a pile cap 21 and piles 22 fixed to the bottom of the pile cap 21. The first connecting beam 8 extends in the front-to-back direction and is located on the side of the foundation connecting beam 3 between the two static foundations 2, closer to the dynamic foundation 1. The end of the first connecting beam 8 is fixed to the corresponding pile cap 21. The left side of the first connecting beam 8 is spaced apart from the right side of the dynamic foundation 1.

[0028] Furthermore, such as Figure 2 , Figure 5 and Figure 6 As shown, the second force guiding member 6 is the second connecting beam 9, which extends in the front-to-back direction. One end of the second connecting beam 9 is fixed to the top surface of the static foundation 2, and the other end of the second connecting beam 9 is arranged at intervals with the dynamic foundation 1.

[0029] It should be noted that in other embodiments, the first force guiding member 5 can be the second connecting beam 9, and the second force guiding member 6 can be the first connecting beam 8, depending on the actual situation.

[0030] Furthermore, the interval between the first guide member 5 and the dynamic foundation 1, and the interval between the second guide member 6 and the dynamic foundation 1, are both less than or equal to the horizontal displacement limit of the static foundation 2. If the interval is too large, the static foundation 2 will be damaged when the first guide member 5 or the second guide member 6 contacts the dynamic foundation 1, thus failing to protect the static foundation 2. When the interval is small, the dynamic foundation 1 will directly impact the first guide member 5 or the second guide member 6 under vibration load, and transfer the vibration load to the frame 4, causing the pipelines on the frame 4 to vibrate, affecting the normal production of the power plant. This invention, by setting an interval less than or equal to the horizontal displacement limit of the static foundation 2, allows the small vibrations of the dynamic foundation 1 to be absorbed by the gap during normal operation. However, when encountering a large horizontal load, if the displacement of the static foundation 2 approaches the limit, the first guide member 5 or the second guide member 6 will contact the dynamic foundation 1. The load acting on the static foundation 2 will be transferred to the dynamic foundation 1 through the first guide member 5 or the second guide member 6, forming a mechanism of isolation under normal conditions and load coordination. This not only meets the vibration isolation requirements of the equipment but also enhances the load-bearing capacity requirements of the frame structure.

[0031] Furthermore, such as Figures 1 to 6 As shown, buffer plates 7 are provided within the gap between the first force guide 5 and the power base 1, and within the gap between the second force guide 6 and the power base 1, respectively. The buffer plates 7 are fixed to the power base 1. In this embodiment of the invention, the buffer plate 7 is a 10mm thick polystyrene board, which is adhered and fixed to the side of the power base 1. As a flexible isolation layer, the buffer plate 7 can effectively block the transmission path of equipment vibration on the power base 1, ensuring that the frame 4 is not affected by the vibration of the power base 1; at the same time, the buffer plate 7 has a certain compressive deformation capacity, which can absorb the impact energy of the first force guide 5 or the second force guide 6, protecting the structural components from damage.

[0032] Furthermore, such as Figure 1 As shown, frame 4 includes frame columns 41 and frame beams. Multiple frame columns 41 are provided, each corresponding to a static foundation 2. Each frame column 41 is fixed to a static foundation 2, and at least one frame beam is fixedly connected between adjacent frame columns 41. In this embodiment of the invention, multiple frame beams are fixedly connected between adjacent frame columns 41. These multiple frame beams are arranged at intervals along the vertical height, forming multiple layers of horizontal constraints on the frame columns 41 to improve the lateral stiffness of frame 4.

[0033] like Figures 1 to 6 As shown, based on a frame structure according to the above-described embodiment of the invention, this embodiment of the invention provides a method for reinforcing the above-described frame structure, comprising the following steps: S1, construction dynamic foundation 1, static foundation 2 and frame 4; In step S1, as Figure 1As shown, the construction includes a dynamic foundation 1, a static foundation 2, and a frame 4, providing an existing frame structure. This frame structure includes a dynamic foundation 1 set on the ground, static foundations 2 spaced around the perimeter of the dynamic foundation 1, and a frame 4 fixed to the static foundations 2. Adjacent static foundations 2 are connected by foundation beams 3, and existing exterior walls 11 and noise-reducing exterior walls 12 are constructed on the foundation beams 3. In this embodiment of the invention, as... Figure 1 As shown, the left side of frame 4 is connected to other frame structures, and its left side is located indoors. The wind load on the left side of frame 4 can be ignored. The front and right sides of frame 4 are outdoors, and noise-reducing exterior walls 12 are added on the front H2 axis and the right 20 axis of frame 4. The noise-reducing exterior walls 12 and the existing exterior walls 11 are both built on the foundation connecting beams 3 on the corresponding sides. The noise-reducing exterior walls 12 increase the bearing surface of frame 4. When the wind load acts on the noise-reducing exterior walls 12, it generates a large horizontal thrust. This horizontal thrust is transmitted to the static foundation 2 at the bottom of the frame column 41, causing the load on the static foundation 2 to exceed the original design bearing capacity limit. Therefore, the static foundation 2 at the bottom of frame structure 4 needs to be reinforced.

[0034] S2. Excavate the soil layer between the dynamic foundation 1 and the static foundation 2 downwards to expose the dynamic foundation 1 and the static foundation 2; like Figures 1 to 6 As shown, in this embodiment of the invention, when the first force guiding member 5 adopts the first connecting beam 8, the first connecting beam 8 is fixed to the side of the pile cap 21 of the static foundation 2. Therefore, the excavation surface at the preset position of the first connecting beam 8 should be lower than the bottom surface of the foundation connecting beam 3 on the side of the corresponding pile cap 21. When the second force guiding member 6 adopts the second connecting beam 9, the second connecting beam 9 is fixed to the top surface of the pile cap 21. Therefore, the excavation surface at the preset position of the second connecting beam 9 should be lower than the top surface of the corresponding pile cap 21.

[0035] S3. A first force guide 5 is installed on the left and / or right side of the power base 1; like Figures 2 to 4 As shown, in this embodiment of the invention, a first force guide 5 is provided only on the right side of the dynamic foundation 1. The first force guide 5 is a first connecting beam 8. During construction, the soil layer between the dynamic foundation 1 and the static foundation 2 is first excavated downwards until the excavation surface is lower than the bottom surface of the foundation connecting beam 3. Then, the soil layer at the bottom of the area where the first connecting beam 8 is laid is compacted. Then, the first anchor bars are inserted into the static foundation 2 at both ends of the first connecting beam 8. Finally, the first connecting beam 8 is placed on the compacted soil layer, and the ends of the first connecting beam 8 are fixedly connected to the first anchor bars. In this embodiment of the invention, the first connecting beam 8 is cast in place. First, a steel cage is tied at the designed position of the first connecting beam 8. The main bars at both ends of the steel cage are welded and fixed to the first anchor bars at the corresponding ends. Then, a formwork is erected around the steel cage and concrete is poured, thereby realizing the fixed connection between the first connecting beam 8 and the pile cap 21.

[0036] In other embodiments, the first connecting beam 8 can be a precast beam with pre-reserved connecting steel bars at the beam ends. The first connecting beam 8 is hoisted and placed on the compacted soil layer. Then, the connecting steel bars at the beam ends are welded and fixed to the first anchor bars at the corresponding ends. Then, high-grade concrete is used to pour the connection area between the connecting steel bars and the first anchor bars to form an integral node, thereby realizing the connection between the first connecting beam 8 and the pile cap 21.

[0037] S4. A second force guide 6 is provided on the front and / or rear side of the power base 1; like Figure 2 , Figure 5 and Figure 6 As shown, in this embodiment of the invention, second force guides 6 are provided on both the front and rear sides of the power foundation 1. Since the static foundations 2 on the front and rear sides of the power foundation 1 are far from the power foundation 1, and the equipment foundations 10 supporting the cooling fan and oil station are provided on both sides of the front frame column 41 of the power foundation 1, the second force guide 6 in this embodiment of the invention is a second connecting beam 9. During construction, the soil layer between the power foundation 1 and the static foundation 2 is first excavated downwards until the excavation surface is lower than the top surface of the static foundation 2. Then, the soil layer at the bottom of the area where the second connecting beam 9 is laid is compacted. Then, the second anchor bar 13 is inserted into the top surface of the static foundation 2 at the end of the second connecting beam 9. Finally, the second connecting beam 9 is erected on the top surface of the static foundation 2 and the compacted soil layer, and the end of the second connecting beam 9 is fixedly connected to the second anchor bar 13. In this embodiment of the invention, the second connecting beam 9 is cast in place. First, a steel cage is tied at the designed position of the second connecting beam 9. The steel cage is welded and fixed to the second anchor bar 13 at the corresponding end. Then, a formwork is erected around the steel cage and concrete is poured, thereby realizing the fixed connection between the second connecting beam 9 and the pile cap 21.

[0038] Under normal operating conditions, the first guide member 5 and the second guide member 6 remain separated from the side wall of the dynamic foundation 1, preserving their relative displacement space to prevent the vibration generated by the wind turbine on the dynamic foundation 1 from being transmitted to the frame 4 and the pipeline system. When the wind load acts on the noise reduction wall 12, the horizontal thrust generated by the wind load is transmitted to the static foundation 2 through the frame 4, causing the static foundation 2 to undergo lateral displacement. The first guide member 5 and the second guide member 6 move synchronously with the static foundation 2 and abut against the side wall of the dynamic foundation 1, diverting part of the horizontal load to the dynamic foundation 1 to share the load, effectively reducing the stress on the static foundation 2, so that the load borne by the static foundation 2 is always less than the original design bearing capacity limit, meeting the bearing requirements after the addition of the noise reduction wall 12.

[0039] S4, Backfill soil layer.

[0040] In summary, the reinforcement method for a frame structure according to an embodiment of the present invention requires only the excavation of the shallow soil layer between the dynamic foundation 1 and the static foundation 2 in step S2 to expose the dynamic foundation 1 and the static foundation 2. The work area avoids the dense pipelines at the bottom of the static foundation 2, and the excavation depth and range are controllable, reducing the probability of damage to underground pipelines. The modification can be carried out without interrupting power plant production. Moreover, in steps S3 and S4, first force guides 5 are set on the left and right sides of the dynamic foundation 1, and second force guides 6 are set on the front and rear sides. When wind load is applied to the noise reduction wall 12, the horizontal thrust generated by the wind load is transmitted to the static foundation 2 through the frame 4, causing lateral displacement of the static foundation 2. The force guides move synchronously with the static foundation 2 and abut against the side wall of the dynamic foundation 1, diverting part of the horizontal load to the dynamic foundation 1 to share the load, effectively reducing the stress on the static foundation 2, so that the load borne by the static foundation 2 is always less than the original design bearing capacity limit, meeting the bearing requirements of the static foundation after the addition of the noise reduction wall 12.

[0041] Compared with existing pile foundation reinforcement methods, the reinforcement method of this invention relies only on existing foundation components and does not require large-scale excavation or construction of new piles at the bottom of the pile cap. The construction process is simple, the renovation cycle is short, and the renovation can be carried out without interrupting power plant production. The project cost is lower than that of traditional pile foundation reinforcement schemes.

[0042] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A frame structure, characterized in that, include: Power base (1), set on the foundation, is used to support the induced draft fan / forced draft fan; Static foundations (2) are provided in multiples and are all set on the foundation. The multiple static foundations (2) are arranged at intervals around the outer periphery of the dynamic foundation (1). The frame (4) is fixed to multiple static foundations (2) for fixing the pipelines; The first force guide (5) is provided at least one and is located on the left and / or right side of the power base (1); Each of the first force guides (5) is connected to two adjacent static foundations (2) at both ends, and each of the first force guides (5) is arranged at intervals from the dynamic foundation (1); The second force guide (6) is provided at least one and is located on the front and / or rear side of the power base (1); Each of the second force guiding components (6) is connected at one end to the static foundation (2) and at the other end to the dynamic foundation (1) at intervals; The static foundation (2) can be displaced left and right under force so that the first force guide (5) abuts against the dynamic foundation (1), or the static foundation (2) can be displaced forward and backward under force so that the second force guide (6) abuts against the dynamic foundation (1).

2. The frame structure according to claim 1, characterized in that, The first force guiding member (5) is the first connecting beam (8); The first connecting beam (8) extends in the front-to-back direction, and the two ends of the first connecting beam (8) are respectively connected to the two adjacent static foundations (2). The side of the first connecting beam (8) is arranged at intervals with the dynamic foundation (1).

3. The frame structure according to claim 1, characterized in that, The second force guide (6) is a second connecting beam (9). The second connecting beam (9) extends in the front-back direction. One end of the second connecting beam (9) is fixed to the top surface of the static foundation (2), and the other end of the second connecting beam (9) is arranged at intervals with the dynamic foundation (1).

4. The frame structure according to claim 1, characterized in that, The interval between the first guide member (5) and the dynamic foundation (1), and the interval between the second guide member (6) and the dynamic foundation (1) are both less than or equal to the horizontal displacement limit of the static foundation (2).

5. The frame structure according to claim 1, characterized in that, A buffer plate (7) is provided in the interval between the first force guide (5) and the power base (1), and in the interval between the second force guide (6) and the power base (1). The buffer plate (7) is fixed on the power base (1).

6. The frame structure according to claim 1, characterized in that, The frame (4) includes frame columns (41) and frame beams; The frame column (41) is provided in multiple ways, and the multiple frame columns (41) correspond one-to-one with the multiple static foundations (2). Each frame column (41) is fixed on the static foundation (2), and at least one frame beam is fixedly connected between adjacent frame columns (41).

7. A method for reinforcing a frame structure according to any one of claims 1 to 6, characterized in that, Includes the following steps: S1. Construct the dynamic foundation (1), the static foundation (2), and the frame (4). S2. Excavate the soil layer between the dynamic foundation (1) and the static foundation (2) to expose the dynamic foundation (1) and the static foundation (2). S3. The first force guide (5) is installed on the left and / or right side of the power base (1). S4. The second force guide (6) is provided on the front and / or rear side of the power base (1). S5, Backfill soil layer.

8. The method for reinforcing a frame structure according to claim 7, characterized in that, In step S3, a first force guide (5) is provided on the left and / or right side of the power base (1), including: First, compact the soil layer at the bottom of the area where the first connecting beam (8) is laid. Then, insert the first anchor bar on the static foundation (2) at both ends of the first connecting beam (8). Finally, place the first connecting beam (8) on the compacted soil layer and fix the end of the first connecting beam (8) to the first anchor bar.

9. The method for reinforcing a frame structure according to claim 7, characterized in that, In step S4, a second force guide (6) is provided on the front and / or rear side of the power base (1), including: First, compact the soil layer at the bottom of the area where the second connecting beam (9) is laid. Then, insert the second anchor bar (13) on the top surface of the static foundation (2) at the end of the second connecting beam (9). Finally, erect the second connecting beam (9) on the top surface of the static foundation (2) and the compacted soil layer, and fix the end of the second connecting beam (9) to the second anchor bar (13).

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