Special-shaped steel tower steel-concrete combined section positioning support and positioning method

Abstract

The invention provides a special-shaped steel tower steel-concrete combined section positioning support and method, and belongs to the field of bridge construction. The positioning support is used for installation and positioning in construction, plays a role in supporting and accurate adjustment and comprises a vertical supporting support set, a quality inspection system, a guiding system and a space monitoring system. The vertical supporting support set comprises a plurality of rectangular supports and is composed of stand columns and distribution beams. The quality inspection system comprises a three-way jack and the like; the guide system comprises a guide structure and plays a role in guiding and limiting; the space monitoring system comprises four-corner monitoring points and a shoreside reference point. The conventional special-shaped bracket for positioning has the problems of complicated structure and stress and the like. The device is supported by the rectangular support, the number can be flexibly adjusted, the device adapts to the complex structure of the tower base, the device is matched with the three-way jack and a monitoring system, precise adjustment is achieved, and construction controllability and precision are improved.

Description

Technical Field

[0001] This invention belongs to the field of bridge engineering construction technology, specifically relating to a positioning bracket and positioning method for a steel-concrete composite section of an irregularly shaped steel tower. Background Technology

[0002] Steel towers are widely used in long-span suspension bridges and cable-stayed bridges due to their advantages such as clear stress distribution, novel shapes, and high construction efficiency. To fully utilize the high strength and plasticity of steel while meeting architectural aesthetic requirements, the design and application of irregularly shaped steel towers have attracted widespread attention. The irregularly shaped cable tower has a unique structure, with its steel-concrete composite section often tilted. Serving as the reference for steel tower installation, the positioning accuracy of this composite section directly affects the overall structural stress and the control of the tower's alignment. Furthermore, the steel-concrete composite section is subjected to a complex combination of compression, bending, shear, and torsion stresses, requiring the internal arrangement of numerous prestressed ducts, prestressed bearing plates, and other components, making the structure extremely complex. Existing technologies suffer from poor universality. Traditional supports require individual design to perfectly match the tilt angle, profile dimensions, and stress characteristics of the connecting sections. For different bridge types or different segments of the same bridge type, structural calculations and processing must be re-done, making cross-project reuse impossible. For example, for elliptical and polygonal cross-section connecting sections, the support needs complete reconstruction, extending the design cycle and making it difficult to handle construction fine-tuning. Positioning accuracy is difficult to guarantee; complex irregular supports generate cumulative errors exceeding 5mm due to multi-stage welding and assembly, and are difficult to adjust after installation. Stress concentration at contact points causes local deformation, further amplifying the error and potentially leading to excessive steel tower alignment deviations and high correction costs. This not only increases construction costs but may also affect construction safety due to the excessive weight of the supports. Therefore, this invention proposes a positioning support and method for irregularly shaped steel tower steel-concrete composite sections to at least partially solve the above problems. Summary of the Invention

[0003] To address the aforementioned problems in the existing technology, this invention provides a positioning bracket and positioning method for the steel-concrete composite section of an irregularly shaped steel tower. This solves the problems of the complex irregularly shaped brackets or truss support positioning methods used in the construction of steel-concrete composite sections in the existing technology, which have poor universality, positioning accuracy is easily affected by processing errors, and for large bridge towers, the large material consumption and complex structure lead to increased construction costs and compromised safety.

[0004] The objective of this invention can be achieved through the following technical solution: a positioning support for the steel-concrete composite section of an irregularly shaped steel tower, comprising: A positioning support for the steel-concrete composite section of an irregularly shaped steel tower, characterized in that it comprises: Vertical support bracket group: used to support the main body of the steel-concrete composite section from below. The vertical support bracket group is composed of several independently set brackets, which together bear the self-weight of the main body of the steel-concrete composite section. The quality inspection system includes a basic calculation unit and a correction calculation unit. The basic calculation unit is used to calculate the conventional three-dimensional coordinate positioning of the main body of the steel-concrete composite section. The correction calculation unit is used to calculate the deformation difference between the steel and concrete materials. Guiding system: installed on the vertical support bracket group, used to guide the main body of the steel-concrete composite section during hoisting, and to limit the position during the precise positioning stage; Space monitoring system: includes at least one set of monitoring points deployed on the main body of the steel-concrete composite section, used to acquire the spatial position and attitude data of the main body of the steel-concrete composite section in real time.

[0005] As a preferred embodiment of the present invention, the support is a rectangular support, and each rectangular support consists of a steel column and a distribution beam, and is fixed to the concrete plane of the foundation or tower base by embedded parts.

[0006] As a preferred embodiment of the present invention, the quality inspection system is equipped with a three-dimensional spatial adjustment mechanism, which includes: At least one set of three-way jacks is installed on the distribution beam to provide vertical, longitudinal and lateral jacking forces according to the final positioning adjustment amount output by the quality inspection system; The leveling structure is integrally formed with the main body of the steel-concrete composite section. The leveling structure has a horizontal bottom surface, which is used to provide a top support plane for the three-way jack.

[0007] As a preferred embodiment of the present invention, the guiding system includes a plurality of guiding structures welded to the distribution beam, and the guiding structures are provided with chamfers to guide the steel-concrete composite section to slide into a predetermined position under its own weight.

[0008] As a preferred technical solution of the present invention, the space monitoring system is a five-point space monitoring system, including four monitoring points set at the four corners of the main body of the steel-concrete composite section, and a reference point set at a stable foundation. The coordinates of each point are obtained through the measurement system to calculate the elevation, vertical inclination angle and plane inclination angle of the steel-concrete composite section.

[0009] A method for positioning the steel-concrete composite section of an irregularly shaped steel tower includes the following steps: S100: Provides a positioning bracket for the steel-concrete composite section of an irregularly shaped steel tower; S200: Hoist the main body of the steel-concrete composite section, use the guiding system to achieve initial positioning, and let the main body of the steel-concrete composite section fall onto the vertical support bracket group; S300: Activate the quality inspection system and spatial monitoring system to perform precise attitude adjustment on the main body of the steel-concrete composite section; specifically, this includes: acquiring the spatial position and attitude data of the main body of the steel-concrete composite section in real time through the spatial monitoring system and transmitting it to the quality inspection system; the basic computing unit of the quality inspection system calculates the conventional three-dimensional coordinate positioning quantity based on the data; the correction calculation unit simultaneously calculates the deformation difference between the steel and concrete materials, and adjusts the conventional three-dimensional coordinate positioning quantity using the deformation difference or the deformation difference to obtain the final positioning adjustment quantity; and adjust the spatial position of the main body of the steel-concrete composite section in three dimensions (vertical, longitudinal, and transverse) according to the final positioning adjustment quantity. S400: After the main body position of the steel-concrete composite section is locked, concrete is poured, and the position is continuously monitored using the space monitoring system during the pouring process.

[0010] As a preferred embodiment of the present invention, step S300 specifically includes: S310: Using the vertical support function of the three-way jack, adjust the height of each support point until the elevation of each corner point and the vertical inclination angle measured by the space monitoring system reach the design value; S320: Use the three-way jack on one side of the main body of the steel-concrete composite section for longitudinal support, so that the main body of the steel-concrete composite section rotates in the horizontal plane until its central symmetry plane is parallel to the central symmetry plane of the foundation. S330: All three-way jacks simultaneously perform lateral and / or longitudinal jacking, causing the main body of the steel-concrete composite section to translate until its central symmetry plane coincides with the central symmetry plane of the foundation.

[0011] As a preferred embodiment of the present invention, before step S200, a reinforcement structure is pre-welded at the support point of the main body of the steel-concrete composite section to enhance the local stability and buckling resistance of the transverse diaphragm at that location.

[0012] As a preferred technical solution of the present invention, in step S200: a positioning gap is reserved between the guiding system and the main body of the steel-concrete composite section to meet the requirements of lowering into place.

[0013] As a preferred technical solution of the present invention, each adjustment in steps S310, S320 and S330 is based on the real-time data provided by the space monitoring system and is adjusted in a closed loop.

[0014] The beneficial effects of the present invention are: 1. The vertical support bracket group adopts several independently set rectangular brackets. The number and size can be flexibly adjusted according to the self-weight of the steel-concrete composite section and the internal structure of the tower base. It can avoid complex structures such as prestressed pipes. Compared with traditional irregular brackets, the stress is clearer, the construction is more convenient, and the construction risk and material consumption are reduced.

[0015] 2. The quality inspection system is equipped with a three-dimensional spatial adjustment mechanism that uses three-way jacks to achieve vertical, longitudinal, and lateral three-dimensional adjustment. Combined with the real-time data feedback from the spatial monitoring system, it forms a closed-loop control, which can accurately position the steel-concrete composite section without adjusting the support structure. This greatly improves the installation accuracy and controllability of the steel-concrete composite section.

[0016] 3. The guiding system plays a guiding role during the hoisting stage and a limiting role during precise positioning. Combined with the reserved positioning gap, it ensures the smooth lowering and stable adjustment of the joint section, thereby improving construction efficiency.

[0017] 4. The pre-welded reinforcement structure enhances the local stability of the support points, and the space monitoring system can monitor the attitude of the joint section in real time, ensuring the safety and positioning accuracy of the construction process. It is suitable for the construction of steel-concrete joint sections of various irregular steel towers. In summary, the positioning bracket of this invention has a clear force distribution, a flexible structure, and better construction positioning accuracy and efficiency, making it suitable for various irregular steel tower steel-concrete composite section construction scenarios. Attached Figure Description

[0018] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the steel tower base structure of the present invention; Figure 2 This is a schematic diagram of the vertical support bracket assembly of the present invention; Figure 3 for Figure 2 A schematic diagram of direction 1-1 in the diagram; Figure 4 for Figure 2 Schematic diagram of direction 2-2 in the diagram; Figure 5 for Figure 2 Schematic diagram of direction 3-3 in the diagram; Figure 6 This is a schematic diagram of the quality inspection system and its supporting three-dimensional spatial adjustment mechanism in this invention; Figure 7 for Figure 6 The diagram shows the 4-4 direction. Figure 8 for Figure 6 The diagram shows the 5-5 direction. Figure 9 This is a schematic diagram of the guidance system in this invention; Figure 10 for Figure 9 Detailed diagram A in the diagram; Figure 11 for Figure 9 Detailed diagram B in the diagram; Figure 12 for Figure 9 Detailed diagram of C in the diagram; Figure 13 This is a schematic diagram of the space monitoring system in this invention; Figure 14 This is a schematic diagram of the construction steps in this invention; Figure 15 This is a schematic diagram of construction step S200 in the present invention; Figure 16 This is a schematic diagram of construction step S300 in the present invention; Figure 17 This is a schematic diagram of construction step S400 in the present invention.

[0020] In the diagram: A. Steel-concrete composite section; B. Prestressed tendons and their ducts; C. Prestressed tendon bearing plate; D. Tower base concrete; E. Foundation; 1. Steel column; 2. Distribution beam; 3. Connection system; 4. Embedded parts; 5. Three-way jack; 6. Leveling wedge; 7. Leveling bracket; 8. Pad beam; 9. Reinforcement structure; 10. Pad block; 11. Longitudinal guide structure; 12. Transverse guide structure; 13. Monitoring point; 14. Benchmark point. Detailed Implementation

[0021] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0022] Please refer to Figure 1 As shown, Figure 1 This is a schematic diagram of an elliptical steel tower base structure. The base is located on a foundation E and includes a steel-concrete composite main body A, prestressed tendons and their ducts B, a prestressed tendon bearing plate C, and the base concrete D. A positioning bracket and method for the steel-concrete composite section of an irregularly shaped steel tower are mainly used for installation and positioning during the construction of the steel-concrete composite main body A.

[0023] Please see Figures 1-17 This embodiment provides a positioning bracket and positioning method for the steel-concrete composite section of an irregularly shaped steel tower. The positioning bracket for the steel-concrete composite section of an irregularly shaped steel tower includes: Vertical support bracket group: Composed of several independent rectangular brackets, each rectangular bracket includes a steel column 1 and a distribution beam 2, fixed to the plane of the foundation E or the concrete D of the tower base by embedded parts 4. A connecting system 3 is correspondingly provided on the steel column 1. The connecting system 3 on the steel column 1 connects the columns into a whole to improve its overall stability, enhance structural rigidity, transfer and coordinate loads, and fix the position of components, thereby ensuring the safety, stability, and functionality of the structure. These rectangular brackets collectively support the main body A of the steel-concrete composite section from below, bearing its self-weight. In this embodiment, four sets of rectangular brackets are provided. The top height of the brackets on both longitudinal sides is slightly different according to the inclination angle of the main body A of the steel-concrete composite section to adapt to the inclination posture of the composite section. By reasonably selecting the number and size of the brackets, the brackets can avoid complex structures such as the prestressed tendons and their pipes B and the prestressed tendon bearing plate C inside the tower base, avoiding interference.

[0024] The quality inspection system includes a basic calculation unit and a correction calculation unit. The basic calculation unit receives real-time data from the space monitoring system and calculates the conventional three-dimensional coordinate positioning quantities (such as vertical height and longitudinal / lateral offset) of the main body of the steel-concrete composite section. The correction calculation unit has built-in material property parameters of steel and concrete (elastic modulus, coefficient of linear expansion, etc.). Based on the real-time monitored ambient temperature and the self-weight data of the composite section, it calculates the difference in deformation caused by stress and temperature (such as the difference between the thermal expansion of steel components and the shrinkage of concrete), and adds this difference to the conventional three-dimensional coordinate positioning quantities to output the final positioning adjustment quantity.

[0025] A three-dimensional spatial adjustment mechanism is set between the vertical support bracket group and the steel-concrete composite section, including a three-way jack 5 and a leveling structure. The three-way jack 5 is placed on the distribution beam 2 of the bracket to provide vertical, longitudinal, and lateral support forces according to the final positioning adjustment. The leveling structure (including leveling wedges 6, leveling brackets 7, etc.) is integrally formed with the main body A of the steel-concrete composite section, and its horizontal bottom surface provides a stable support plane for the three-way jack 5. Due to the large force at the support point, a reinforcement structure 9 is set at the corresponding position of the main body A of the steel-concrete composite section. It is welded to the transverse diaphragm of the composite section to form an integral whole, dividing the support area into multiple small compartments, reducing the width-to-thickness ratio of the plates, and improving the local stability and buckling resistance of the transverse diaphragm. The pad beam 8 can act as a shim between the jack and the leveling structure to ensure uniform force distribution at each support point. After adjustment, the composite section can be temporarily locked with shims 10 to prevent displacement.

[0026] The guiding system consists of several guiding structures welded and fixed to the distribution beam 2 of the support frame. It provides guidance during the lowering of the main body A of the steel-concrete composite section. In this embodiment, the guiding system includes a longitudinal guiding structure 11 and a transverse guiding structure 12. The top of the guiding structure has a chamfered slope. When the steel-concrete composite section is hoisted above the support frame and slowly lowered, under its own weight, the edge of the composite section slides along the slope of the guiding structure into the predetermined support position, thus achieving initial alignment. An appropriate gap is reserved between the guiding structure and the main body of the composite section to ensure that the composite section can be smoothly lowered into place. During subsequent precise positioning and adjustment using the three-way jack 5, the guiding structure closely adheres to the edge of the composite section, acting as a limit and preventing excessive horizontal displacement of the composite section.

[0027] Space Monitoring System: This embodiment employs a five-point space monitoring system, including one monitoring point 13 at each of the four corners of the steel-concrete composite section A, and a reference point 14 set at a stable foundation near the construction site. Monitoring points 13 can be equipped with GNSS (Global Navigation Satellite System) receiving antennas or prisms, while reference point 14 serves as the measurement reference. The three-dimensional coordinates of each monitoring point 13 are acquired in real time using a measurement system such as RTK (Real-Time Kinematic) carrier phase measurement and transmitted to the data processing terminal. Based on the coordinate data of the four corner points, the computer calculates in real time the overall elevation, vertical tilt angle (facade inclination angle), and planar tilt angle (planar torsion angle) of the steel-concrete composite section A, among other attitude parameters. This monitoring data provides feedback to the operators, guiding the adjustment of the three-way jack 5 and achieving closed-loop control of the spatial position of the composite section.

[0028] This invention also provides a method for positioning the steel-concrete composite section of an irregularly shaped steel tower using the aforementioned positioning bracket, the construction process of which is as follows: Construction Preparation (S100): During the construction of the foundation E, pre-embed the necessary embedded parts 4 for the positioning bracket according to the design position. After the concrete of foundation E reaches its strength, install steel columns 1 at the pre-embedded positions and erect distribution beams 2 to form the skeleton of the vertical support bracket group. Weld the guide structure and other components to the distribution beams 2 as a whole and install them in place together with the distribution beams 2. Place three-way jacks 5 on each distribution beam 2 and temporarily fix them. At the same time, process the main body A of the steel-concrete composite section in the factory, and weld leveling wedges 6, leveling brackets 7, and reinforcing structures 9 at the four corners of its bottom to form a whole with the composite section. Install monitoring point 13 sensors at the designated positions at the four corners of the composite section. After completing the above preparations, hoist the main body A of the steel-concrete composite section to the top of the positioning bracket at the designed tilt angle using a large crane (tower crane or floating crane, etc.), ready to be lowered into place.

[0029] Lifting and Positioning (S200): After the main body A of the steel-concrete composite section is hoisted directly above the support frame, it is slowly lowered. During the lowering process, the operators adjust the hoisting ropes to align the composite section with the approximate position of the support frame. When the bottom of the composite section approaches the top of the support frame, the guide structure begins to function, and the edge of the composite section slides along the chamfered slope of the guide structure, finally landing smoothly at the support position of the three-way jack 5 on the support frame. At this point, the weight of the composite section is shared by all the supports, and the initial positioning is completed. Because a gap is reserved between the guide structure and the composite section, no jamming occurs during the lowering process, ensuring the smooth placement of the composite section.

[0030] Precise Adjustment (S300): With the main body A of the steel-concrete composite section positioned behind the support, the quality inspection system and space monitoring system are activated to precisely adjust the spatial attitude of the composite section. The space monitoring system uses GNSS and RTK technology to acquire real-time data on the three-dimensional coordinates, ambient temperature, and self-weight of the composite section from the four corner monitoring points 13, transmitting this data to the quality inspection system. The adjustment process is carried out step-by-step in the order of "elevation and tilt angle first, then plane rotation, and finally plane translation," with each step controlled in a closed loop by the quality inspection system. Adjusting elevation and vertical inclination: The basic calculation unit calculates the conventional vertical positioning amount based on monitoring data; the correction calculation unit simultaneously calculates the difference in vertical deformation between steel and concrete due to their own weight and temperature; the final positioning adjustment amount = conventional positioning amount + difference in vertical deformation. The quality inspection system drives the three-way jack 5 to perform vertical jacking until the space monitoring system displays that the elevation and vertical inclination of each corner point have reached the design value.

[0031] Adjusting the plane rotation angle: The basic calculation unit calculates the longitudinal rotation conventional positioning amount (such as the required rotation angle) based on the monitoring data; the correction calculation unit simultaneously calculates the difference in horizontal deformation between steel and concrete (such as the difference in longitudinal shear deformation); the final positioning adjustment amount = conventional positioning amount + difference in horizontal deformation. The quality inspection system drives the three-way jack 5 on one side to perform longitudinal jacking, so that the main body rotates in the horizontal plane until its central symmetry plane is parallel to the central symmetry plane of the foundation.

[0032] Adjusting the planar position translation: The basic calculation unit calculates the conventional lateral / longitudinal translation amount based on monitoring data; the correction calculation unit simultaneously calculates the difference in horizontal deformation between the steel and concrete; the final positioning adjustment amount = conventional positioning amount + difference in horizontal deformation. The quality inspection system drives all three-way jacks to simultaneously support the structure, translating it until the central symmetry plane coincides. When the planar position deviation is within the allowable range, the translation adjustment stops. At this point, the three-dimensional spatial position of the steel-concrete composite section has been precisely adjusted to its correct position.

[0033] As a preferred embodiment of the present invention, step S300 specifically includes: SS310: The space monitoring system acquires real-time data on the elevation and vertical inclination of each corner point and transmits it to the quality inspection system. The basic calculation unit calculates the conventional vertical positioning amount, and the correction calculation unit simultaneously calculates the difference in vertical deformation between the steel and concrete due to their own weight and temperature. This difference is used to correct the conventional positioning amount. Based on the corrected positioning amount, the vertical support function of the three-way jack is used to adjust the height of each support point until the monitoring data reaches the design value. S320: The space monitoring system acquires planar torsion data in real time and transmits it to the quality inspection system. The basic calculation unit calculates the longitudinal rotation conventional positioning amount, and the correction calculation unit simultaneously calculates the difference in horizontal deformation between steel and concrete. This difference is used to correct the conventional positioning amount. Based on the corrected positioning amount, the three-way jacks on one side of the main body of the steel-concrete composite section are used for longitudinal support, so that the main body rotates in the horizontal plane until its central symmetry plane is parallel to the central symmetry plane of the foundation. S330: The space monitoring system acquires plane offset data in real time and transmits it to the quality inspection system. The basic calculation unit calculates the conventional positioning amount of horizontal / longitudinal translation, and the correction calculation unit calculates the difference in horizontal deformation between steel and concrete simultaneously. This difference is used to correct the conventional positioning amount. Based on the corrected positioning amount, all three-dimensional jacks simultaneously perform horizontal and longitudinal jacking to make the main body translate to coincide with the central symmetry plane.

[0034] Locking and Pouring (S400): After the steel-concrete composite section is precisely aligned, pads 10 are driven into each support point to temporarily lock the composite section onto the support, preventing displacement during subsequent construction. Once the locking is confirmed to be secure, the concrete D of the tower base can be poured. Concrete pouring should be carried out in layers, for example, four layers, to minimize the impact of a single pour on the position of the composite section. Throughout the concrete pouring and solidification process, the spatial monitoring system continuously acquires coordinate, temperature, and concrete solidification shrinkage data, transmitting them to the quality inspection system. The correction calculation unit updates the deformation difference between the steel and concrete in real time, dynamically correcting the positioning amount. If the monitoring shows that the displacement of the composite section exceeds 0.5mm, the quality inspection system automatically outputs adjustment commands, using three-way jacks 5 for real-time correction, ensuring that the positioning accuracy is always controlled within ±1mm during the pouring process. After the tower base concrete D reaches its design strength and is completely integrated with the steel-concrete composite section, the positioning support and temporary pads 10 are removed, completing the installation and positioning of the steel-concrete composite section of the irregular steel tower.

[0035] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A positioning bracket for a steel-concrete composite section of an irregularly shaped steel tower, characterized in that, include: Vertical support bracket group: used to support the main body of the steel-concrete composite section from below. The vertical support bracket group is composed of several independently set brackets, which together bear the self-weight of the main body of the steel-concrete composite section. The quality inspection system includes a basic calculation unit and a correction calculation unit. The basic calculation unit is used to calculate the conventional three-dimensional coordinate positioning of the main body of the steel-concrete composite section. The correction calculation unit is used to calculate the deformation difference between the steel and concrete materials. Guiding system: installed on the vertical support bracket group, used to guide the main body of the steel-concrete composite section during hoisting, and to limit the position during the precise positioning stage; Space monitoring system: includes at least one set of monitoring points deployed on the main body of the steel-concrete composite section, used to acquire the spatial position and attitude data of the main body of the steel-concrete composite section in real time.

2. The positioning bracket for the steel-concrete composite section of an irregularly shaped steel tower according to claim 1, characterized in that: The support is a rectangular support, and each rectangular support consists of a steel column and a distribution beam, and is fixed to the concrete plane of the foundation or tower base by embedded parts.

3. The positioning bracket for the steel-concrete composite section of an irregularly shaped steel tower according to claim 2, characterized in that, The quality inspection system is equipped with a three-dimensional spatial adjustment mechanism, which includes: At least one set of three-way jacks is installed on the distribution beam to provide vertical, longitudinal and lateral jacking forces according to the final positioning adjustment amount output by the quality inspection system; The leveling structure is integrally formed with the main body of the steel-concrete composite section. The leveling structure has a horizontal bottom surface, which is used to provide a top support plane for the three-way jack.

4. A positioning bracket for a steel-concrete composite section of an irregularly shaped steel tower according to claim 2, characterized in that: The guiding system includes several guiding structures welded to the distribution beam. The guiding structures are provided with chamfers to guide the steel-concrete composite section to slide into a predetermined position under its own weight.

5. A positioning bracket for a steel-concrete composite section of an irregularly shaped steel tower according to claim 1, characterized in that: The space monitoring system is a five-point space monitoring system, including four monitoring points set at the four corners of the main body of the steel-concrete composite section, and a reference point set at the stable foundation. The coordinates of each point are obtained through the measurement system to calculate the elevation, vertical inclination angle and plane inclination angle of the steel-concrete composite section.

6. A method for positioning the steel-concrete composite section of an irregularly shaped steel tower, applied to a positioning bracket for the steel-concrete composite section of an irregularly shaped steel tower as described in any one of claims 1-5, characterized in that, Includes the following steps: S100: Provides a positioning bracket for the steel-concrete composite section of an irregularly shaped steel tower as described in any one of claims 1-5; S200: Hoist the main body of the steel-concrete composite section, use the guiding system to achieve initial positioning, and let the main body of the steel-concrete composite section fall onto the vertical support bracket group; S300: Activate the quality inspection system and the space monitoring system to perform precise attitude adjustment on the main body of the steel-concrete composite section; specifically, this includes: acquiring the spatial position and attitude data of the main body of the steel-concrete composite section in real time through the space monitoring system and transmitting it to the quality inspection system; the basic computing unit of the quality inspection system calculates the conventional three-dimensional coordinate positioning quantity based on the data; the correction quantity calculation unit simultaneously calculates the deformation difference between the steel material and the concrete material; and uses the deformation difference or deformation difference to adjust the conventional three-dimensional coordinate positioning quantity to obtain the final positioning adjustment quantity; Based on the final positioning adjustment amount, the main body of the steel-concrete composite section is adjusted in three dimensions: vertical, longitudinal, and transverse. S400: After the main body position of the steel-concrete composite section is locked, concrete is poured, and the position is continuously monitored using the space monitoring system during the pouring process.

7. The method for positioning the steel-concrete composite section of an irregularly shaped steel tower according to claim 6, characterized in that, The S300 step specifically includes: S310: The space monitoring system acquires the elevation and vertical inclination data of each corner point in real time and transmits them to the quality inspection system. The basic calculation unit calculates the conventional positioning amount in the vertical direction, and the correction calculation unit simultaneously calculates the difference in vertical deformation between steel and concrete due to their own weight and temperature. This difference is used to correct the conventional positioning amount. Based on the corrected positioning amount, the vertical support function of the three-way jack is used to adjust the height of each support point until the monitoring data reaches the design value. S320: The space monitoring system acquires planar torsion data in real time and transmits it to the quality inspection system. The basic calculation unit calculates the longitudinal rotation conventional positioning amount, and the correction calculation unit simultaneously calculates the difference in horizontal deformation between steel and concrete. This difference is used to correct the conventional positioning amount. Based on the corrected positioning amount, the three-way jacks on one side of the main body of the steel-concrete composite section are used for longitudinal support, so that the main body rotates in the horizontal plane until its central symmetry plane is parallel to the central symmetry plane of the foundation. S330: The space monitoring system acquires plane offset data in real time and transmits it to the quality inspection system. The basic calculation unit calculates the conventional positioning amount of horizontal / longitudinal translation, and the correction calculation unit calculates the difference in horizontal deformation between steel and concrete simultaneously. This difference is used to correct the conventional positioning amount. Based on the corrected positioning amount, all three-dimensional jacks simultaneously perform horizontal and longitudinal jacking to make the main body translate to coincide with the central symmetry plane.

8. A method for positioning the steel-concrete composite section of an irregularly shaped steel tower according to claim 6, characterized in that, Prior to step S200, the method further includes: pre-welding a reinforcing structure at the support point of the main body of the steel-concrete composite section to enhance the local stability and buckling resistance of the transverse diaphragm at that location.

9. A method for positioning the steel-concrete composite section of an irregularly shaped steel tower according to claim 6, characterized in that, In step S200: a positioning gap is reserved between the guide system and the main body of the steel-concrete composite section to meet the requirements of lowering into place.

10. A method for positioning the steel-concrete composite section of an irregularly shaped steel tower according to claim 7, characterized in that: Each adjustment step in S310, S320, and S330 takes real-time data from the space monitoring system as input, calculates the conventional positioning quantity through the basic computing unit of the quality inspection system, calculates the deformation difference through the correction quantity calculation unit, and corrects it to form the final positioning adjustment quantity. This is used as the feedback basis for closed-loop control adjustment.

Images