A construction method for the steel structure of a radio and television transmission tower

Abstract

The present invention discloses a construction method for the steel structure of a radio and television transmission tower. Different from the conventional television transmission tower with a larger bottom and a smaller top, it adopts a "small waist" structural form. Through the change of the diameter at different elevation positions, the graceful arc shape of the entire iron tower is achieved. This unified structural unit also forms rhythm and cadence in the visual perception. The overall image and form of the iron tower are more novel and unique due to the clear expression of this structural logic. Exquisite lines are expressed by using a modern structural system and structural components. Through the reasonable design of the steel structure, the design of structural connections, and the design of construction steps, the strength requirements, safety requirements, and service requirements of the structure are met, and the construction of the "small waist" radio and television transmission tower is realized.

Description

Technical Field

[0001] The present invention belongs to the field of the construction of steel structures of television towers, and particularly relates to a construction method for the steel structure of a radio and television transmitting tower. Background Art

[0002] With the needs of social development, many large vertical steel structures have emerged, such as television transmitting towers, signal towers, chemical towers and other buildings. In response to the development needs of vertical structures, engineers are actively exploring more advanced, more economical and more reliable construction technologies applicable to large vertical structures.

[0003] At present, most radio and television transmitting towers have a structure that is smaller at the top and larger at the bottom. With the continuous improvement of architectural style requirements, it is necessary to build a radio and television transmitting tower with a "small waist" structure that is smaller in the middle and larger at the top and bottom. When constructing such a radio and television transmitting tower, there are the following difficulties. Since the conventional transmitting tower is smaller at the top and larger at the bottom, the steel structure can be hoisted and constructed in sequence in a conical shape. However, for a super-high transmitting tower with a "small waist" shape, it is difficult to meet the safety requirements in terms of structural strength. Summary of the Invention

[0004] The present invention provides a construction method for the steel structure of a radio and television transmitting tower to solve the technical problems mentioned in the background art.

[0005] To achieve the above object, the present invention adopts the following technical solutions: A construction method for the steel structure of a radio and television transmitting tower, comprising the following steps,

[0006] Step 1: Deepen the design of the structural form of the lotus steel structure, and use TEKLA software to deepen the design of the steel structure. The steel structure includes a shaft column, a tower body, a transition section, a tower building and a mast. The shaft column is a column located in the center. The tower body includes tower columns, diagonal bars, horizontal bars and diaphragm layers. The tower columns are arranged vertically, and the tower columns as a whole form an arc structure in the shape of a "small waist". The diagonal bars are obliquely connected between the tower columns, the horizontal bars are horizontally connected between the tower columns, and the diaphragm layer includes radial main cross bars and diaphragm member bars. The radial main cross bars are connected between the shaft column and the tower columns, and the diaphragm member bars are connected between the corresponding tower columns of the radial main cross bars;

[0007] Step 2: Construction segmentation form. One height of tower column is one layer of tower column. After the diaphragm layer is set on the first floor, the diaphragm layer is set every three layers of tower columns. A connecting plate is fixedly arranged on one side of the tower columns with the diaphragm layer facing the shaft column, and the diaphragm member bars are connected to the connecting plate. The tower columns on the first floor are arranged in sequence with different heights in a staggered manner so that the nodes of the tower columns on the first floor are arranged at intervals and crosswise in the height direction;

[0008] Step 3: Pre-buried anchor bolts are constructed. The tower column has 24 foundations that are pre-buried anchor bolts in the cap. The depth of the pre-buried anchor bolts is 1-3mm. The well column foundation is a single pre-buried anchor bolt with a diameter of 2m. The pre-buried anchor bolts corresponding to the tower column are evenly distributed in a ring around the pre-buried anchor bolts corresponding to the well column.

[0009] Step 4: Deploy the tower crane according to the construction size and site;

[0010] Step 5: Hoisting of shaft columns and tower columns,

[0011] 1) Use a total station to re-measure the embedded anchor bolts in the shaft, and lay out the axis size to ensure that the shaft steel column is accurately positioned. Hoist the shaft column to the plane position of the shaft column, command the tower crane to put the component in place, make the shaft column flange butt with the embedded anchor bolt flange and check whether the installation angle is correct, and ensure that the axis marked on the lower end of the steel column coincides with the axis on the foundation anchor bolt flange plate;

[0012] 2) After the first section of the shaft column is installed, install the cantilever frame beam between the shaft column and the machine room under the tower. After the machine room frame beam is installed, measure the verticality of the shaft column. After it meets the specification requirements, tighten the cantilever frame beam connection bolts in time;

[0013] 3) Hoist the first-floor tower column, install the diagonal rod and horizontal rod on the first steel column on the first steel column, then install the first tower column, install the diagonal rod and horizontal rod on the second steel column on the second steel column, then install the second tower column and connect it to the first tower column... until all the first-floor tower columns are installed and closed;

[0014] 4) Hoist the second section of the shaft column and install it on the top of the first section of the shaft column;

[0015] 5) When hoisting the second-floor tower column, first hoist a tower column that is connected to the first-floor tower column with an inclined rod, and then hoist the remaining second-floor tower columns in sequence until all the tower columns are installed and closed;

[0016] 6) Repeat steps 4) and 5) to sequentially hoist shaft columns and tower columns of different heights. When the construction is completed in multiples of three, a partition layer is constructed on the multiples of three layers. The partition structure rods are connected between the tower columns separated by three, and the partition structure rods form a regular hexagon. The tower columns connected with the partition structure rods are connected to the shaft columns through radial main cross bars until they are installed to the tower;

[0017] Step 6. Installation of the transition section. The transition section includes transition-section steel columns, transition-section crossbars, and transition-section diagonal bars. The bottom end of the transition-section steel column is connected to the tower column, the top of the transition-section steel column is connected to the top end of the shaft column, the transition-section crossbars and transition-section diagonal bars are connected between adjacent transition-section steel columns, and the top of the transition-section steel column is connected to the mast. During construction, the shaft column is installed higher than the tower column, and then the transition section is hoisted. After the transition section is hoisted, the tower column is installed to be higher than the shaft column, and all the construction of the tower column is completed.

[0018] Step 7. Hoisting of the tower. The tower includes cantilever frame beams and channel steels. The cantilever frame beams are connected between the shaft column and the tower column, and the channel steels are connected between the cantilever frame beams. The cantilever frame beams and the channel steels form a grid surface structure. Checkered plates are laid on the cantilever frame beams and the channel steels to complete the hoisting of the tower. The tower is provided with two layers in the height direction.

[0019] Step 8. Hoisting of the mast. The bottom section of the mast is hoisted by a tower crane and installed on the transition-section steel column of the transition section, and the top section of the mast is hoisted by a gin pole.

[0020] Preferably, a spiral ascending staircase is fixedly installed on the shaft column. When hoisting the shaft column, the spiral ascending staircase is fixed on the shaft column first and then hoisted.

[0021] Preferably, the total height of the tower column is 152 m, the contour diameter at the bottom of the tower column is 38.250 m, the minimum contour diameter in the middle of the tower column is 9.33 m, the outward extension at the top of the tower column is 22 mm, the two layers of the tower are respectively located at 139.6 m and 147.8 m, and the top height of the mast is 210.1 m.

[0022] Preferably, the 152 - 168 m of the mast is hoisted by a tower crane, and the 168 - 210.1 m is hoisted by a gin pole.

[0023] Preferably, in Step 6, the transition-section crossbars and transition-section diagonal bars are spliced on the ground and then hoisted as a whole.

[0024] Preferably, the tower columns are connected by flanges, and the tower columns are respectively connected to the horizontal bars and the radial main crossbars by flanges.

[0025] Preferably, the end of the diagonal bar is provided with a U-shaped socket, and the diagonal bar is connected to the tower column through the U-shaped socket by bolts.

[0026] Preferably, it also includes the construction of tower crane attachment. The tower crane adopts the model of TC7525 - 16D, and the attachment heights are respectively located at 39.15 m, 57.9 m, 75.15 m, 92.4 m, 108.9 m, 125.4 m, and 141.9 m.

[0027] Preferably, it also includes the control of measurement accuracy;

[0028] Layout of verticality measurement points: For the measurement plane control of the tower body, the main axis method is adopted, and two orthogonal lines are used as the verticality control network for this project; Layout of elevation points:

[0029] The embedding position of the bench mark is outside the deformation area of the building, and the distance from the building is not less than 20m;

[0030] Measurement method for the verticality of the outer tower column: The outer tower column is a steel column inclined towards the tower center in the shape of a regular octagon. When measuring the verticality of the outer tower column, on the eight faces of the octagon formed by the tower body, four faces in the orthogonal direction are taken as the positions for measuring the verticality. The total station is set up on the two orthogonal axes around the tower body to measure the verticality of the steel column towards the center direction. The total station is set up at the axis control point of the tower body, aiming at another point in front of the axis, then locking the horizontal direction knob, and then using the total station to aim at the intersection position of the horizontal and inclined rods on each floor of the tower body. If the intersection position of each floor of the cross bar coincides with the aiming crosshair, there is no deviation in the verticality of the tower body. If the intersection of the steel column and the aiming crosshair does not coincide, the standard direction can be set to 0 degrees, and the horizontal screw is finely adjusted to make the intersection of the steel column coincide with the crosshair, and the deviation angle is measured. Through coordinate calculation, the verticality deviation can be calculated. The calculation method is as follows:

[0031] Given that the coordinates of the measuring station are (a1, b1), the coordinates of the intersection of the steel column are (a2, b2), and the deviation angle is θ, then the verticality deviation is

[0032] Measure the verticality of the tower body on the other axis perpendicular to the tower body according to the above method. The vector sum of the two measurement values is the overall verticality deviation of the tower body;

[0033] Measurement method for the horizontal elevation of the outer tower column: Eight points are evenly taken on the horizontal cross bars around the tower body for measuring the horizontal elevation of the cross bars; The total station is used to measure the height difference between the cross bar and the known bench mark on the ground, so as to calculate the horizontal elevation of the cross bar of the tower body;

[0034] Measurement method for the verticality of the shaft: The shaft of the tower body is in the form of a single pipe structure, and the shaft columns are perpendicular to the ground; During measurement, the total station is set up on the two orthogonal axes, and a vertical surface of the steel pipe is aimed at for measurement;

[0035] Measurement of the verticality of the mast section: The mast section ranges from 152 meters to 208 meters, with a total height of 56 meters, and is a vertical quadrilateral lattice column. During measurement, the total station is arranged on the axes perpendicular to each other of the mast section for measurement, and the measuring point aims at the center position of the cross bar of the mast section.

[0036] The beneficial effects of the present invention are as follows: unlike conventional TV transmission towers that are larger at the bottom and smaller at the top, a small waist-shaped structure is adopted, and the graceful arc shape of the entire tower is achieved through changes in diameter at different elevations. This unified structural unit also forms a rhythm and rhythm in visual perception. The overall image and form of the tower are also more novel and unique due to the clear expression of the structural logic. Exquisite lines are expressed using modern structural systems and structural components. Through the reasonable design of the steel structure, the design of the structural connection, and the design of the construction steps, the strength requirements, safety requirements and use requirements of the structure are met, and the construction of the small waist radio and television transmission tower is realized.

[0037] Other features and advantages of the present invention will be set forth in the following description, and in part will become apparent from the description, or may be understood by practicing the present invention; the main purpose and other advantages of the present invention may be realized and obtained through the solutions particularly pointed out in the description. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

[0039] Figure 2 is a schematic diagram of tower column node connection according to an embodiment of the present invention;

[0040] Figure 3 is a schematic diagram of the arrangement of embedded parts in an embodiment of the present invention;

[0041] Figure 4 It is a schematic diagram of hoisting the frame beam of the machine room according to an embodiment of the present invention;

[0042] Figure 5 It is a schematic diagram of the hoisting of the first tower column of the second floor according to an embodiment of the present invention;

[0043] Figure 6 is a schematic diagram of a top view of the structure of the partition surface layer of an embodiment of the present invention;

[0044] Figure 7 is a schematic diagram of the hoisting of the transition section of an embodiment of the present invention;

[0045] Figure 8 It is a schematic top view of the structure of the first-floor tower according to an embodiment of the present invention.

[0046] Figure numerals: 1, shaft column; 2, tower body; 21, tower column; 22, diagonal rod; 221, U-shaped plug plate; 23, horizontal rod; 3, transition section; 31, transition section steel column; 32, transition section cross bar; 33, transition section diagonal rod; 4, tower; 41, cantilever frame beam; 42, channel steel; 5, mast; 6, partition layer; 61, radial main cross bar; 62, partition member rod; 7, connecting plate; 8, machine room frame beam; 9, spiral ascending ladder. Detailed implementation mode

[0047] The technical solution of the present invention will be described in detail below through embodiments. The following embodiments are merely exemplary and can only be used to explain and illustrate the technical solution of the present invention, rather than being construed as a limitation to the technical solution of the present invention.

[0048] Combined with Figure 1-8 , a construction method for the steel structure of a radio and television transmission tower, comprising the following steps

[0049] Step 1: Deepen the design of the structural form of the lotus steel structure, and use TEKLA software to deepen the design of the steel structure. The steel structure includes a shaft column 1, a tower body 2, a transition section 3, a tower 4 and a mast 5. The shaft column 1 is a column located in the center. The tower body 2 includes tower columns 21, diagonal rods 22, horizontal rods 23, and diaphragm layers 6. The tower columns 21 are arranged vertically, and the tower columns 21 as a whole form an arc structure in the shape of a slender waist. The diagonal rods 22 are obliquely connected between the tower columns 21, the horizontal rods 23 are horizontally connected between the tower columns 21, and the diaphragm layer 6 includes radial main cross bars 61 and diaphragm member rods 62. The radial main cross bars 61 are connected between the shaft column 1 and the tower columns 21, and the diaphragm member rods 62 are connected between the corresponding tower columns 21 of the radial main cross bars 61. The setting of the diaphragm layer 6 ensures the overall strength of the structure and the stability of the slender waist steel structure.

[0050] Step 2: Construction segmentation form. One height of the tower column 21 is one layer of the tower column 21. After the diaphragm layer 6 is set on the first floor, the diaphragm layer 6 is set every three layers of the tower column 21. The interval of the diaphragm layer 6 is about 17m. A connecting plate 7 is fixedly arranged on the side of the tower column 21 where the diaphragm layer 6 is set and facing the shaft column 1. The diaphragm member rod 62 is connected to the connecting plate 7. By setting the connection layout of the connecting plate 7 and the diaphragm layer 6, high structural strength and high connection structural strength are ensured. The tower columns 21 on the first floor are arranged in sequence with different heights in a staggered manner, so that the nodes of the tower columns 21 on the first floor are arranged at intervals and crosswise in the height direction.

[0051] Step 3: Embedded anchor bolt construction. The tower column 21 uses 24 roots of the foundation in the form of embedded anchor bolts in the pile cap. The depth of the embedded anchor bolts is 1-3mm. The foundation of the shaft column 1 is a single embedded anchor bolt with a diameter of 2m. The corresponding embedded anchor bolts of the tower column 21 are evenly distributed in a ring around the corresponding embedded anchor bolts of the shaft column 1.

[0052] Step 4: Deploy the tower crane according to the construction dimensions and the site. The layout of the tower crane is arranged according to the existing technology.

[0053] Step 5: Hoisting of the shaft column 1 and the tower column 21

[0054] 1) Use a total station to re-measure the pre-buried anchor bolts in the shaft, and lay out the axis dimensions to ensure accurate positioning of the shaft steel column. Assemble the shaft column 1 and the spiral ladder and ladder components on site, and use a tower crane to hoist the components to the plane position of the shaft column 1. Direct the tower crane to put the components in place, so that the flange of the shaft column 1 is connected with the pre-buried anchor bolt flange and check whether the installation angle is correct, and ensure that the axis marked on the lower end of the steel column coincides with the axis on the foundation anchor bolt flange plate;

[0055] 2) After the machine room frame beam 8 is constructed and the first section of the shaft column 1 is installed, the cantilever frame beam 41 between the shaft column 1 and the machine room under the tower is installed. After the machine room frame beam 8 is installed, the verticality of the shaft column 1 is measured. After meeting the specification requirements, the connecting bolts of the cantilever frame beam 41 are tightened in time;

[0056] 3) Hoisting the first-floor tower column 21, installing the oblique rod 22 and the horizontal rod 23 on the first steel column on the first steel column, then installing the first tower column 21, installing the oblique rod 22 and the horizontal rod 23 on the second steel column on the second steel column, then installing the second tower column 21 and connecting it to the first tower column 21 ... until all the first-floor tower columns 21 are installed and closed;

[0057] 4) hoisting the second section of the shaft column 1, hoisting the second section of the shaft column 1 and installing it on the top of the first section of the shaft column 1;

[0058] 5) Hoisting the second-floor tower column 21, first hoisting a tower column 21 connected to the first-floor tower column 21 by an inclined rod 22, and then hoisting the remaining second-floor tower columns 21 in sequence until all the tower columns 21 are installed and closed. Since the tower columns 21 are tower columns 21 of different heights and are arranged alternately in sequence, the nodes of the tower columns 21 of the first floor are arranged alternately in the height direction. Therefore, the tower columns 21 of the second floor are first installed on the short tower columns 21 of the first floor, which can facilitate the connection of the inclined rod 22, thereby improving the construction efficiency;

[0059] 6) Repeat steps 4) and 5) to sequentially hoist the shaft columns 1 and tower columns 21 of different heights. When the construction is completed in multiples of three, a partition layer 6 is constructed on the multiples of three layers. The partition structure rods are connected between the tower columns 21 spaced three apart. The partition structure rods form a regular hexagon. The tower columns 21 connected with the partition structure rods are connected to the shaft columns 1 through radial main cross bars 61 until they are installed to the tower 4.

[0060] Step 6: Installation of the transition section 3. The gravity of the mast 5 is dispersed to the tower column 21 by using the transition section 3, ensuring strong overall structural stability. After the force is dispersed, it can meet the support requirements. The transition section 3 includes a transition section steel column 31, a transition section cross bar 32, and a transition section diagonal bar 33. The bottom end of the transition section steel column 31 is connected to the tower column 21, the top of the transition section steel column 31 is connected to the top end of the shaft column 1, the transition section cross bar 32 and the transition section diagonal bar 33 are connected between adjacent transition section steel columns 31, and the top of the transition section steel column 31 is connected to the mast 5. During construction, the shaft column 1 is installed higher than the tower column 21, and then the transition section 3 is hoisted. The shaft column 1 being higher than the tower column 21 facilitates the hoisting of the transition section 3. After the transition section 3 is hoisted, the tower column 21 is installed to be higher than the shaft column 1, and all construction of the tower column 21 is completed;

[0061] Step 7: Hoisting of the tower building 4. The tower building 4 includes a cantilever frame beam 41 and channel steel 42. The cantilever frame beam 41 is connected between the shaft column 1 and the tower column 21, and the channel steel 42 is connected between the cantilever frame beams 41. The cantilever frame beam 41 and the channel steel 42 form a grid surface structure. Checkered plates are laid on the cantilever frame beam 41 and the channel steel 42 to complete the hoisting of the tower building 4. The tower building 4 is provided with two layers in the height direction, and a partition layer 6 is provided on the first layer at the lower part;

[0062] Step 8: Hoisting of the mast 5. The bottom section of the mast 5 is hoisted by a tower crane and installed on the transition section steel column 31 of the transition section 3, and the top section of the mast 5 is hoisted by a gin pole.

[0063] A spiral ascending staircase 9 is fixedly installed on the shaft column 1. When hoisting the shaft column 1, the spiral ascending staircase is first fixed on the shaft column 1 and then hoisted.

[0064] The total height of the tower column 21 is 152 m, the contour diameter at the bottom of the tower column 21 is 38.250 m, the minimum contour diameter in the middle of the tower column 21 is 9.33 m, the outward expansion at the top of the tower column 21 is 22 mm. The two layers of the tower building 4 are respectively located at 139.6 m and 147.8 m, and the top height of the mast 5 is 210.1 m. The part of the mast 5 from 152 - 168 m is hoisted by a tower crane, and the part from 168 - 210.1 m is hoisted by a gin pole.

[0065] In Step 6, the transition section cross bar 32 and the transition section diagonal bar 33 are spliced on the ground and then hoisted as a whole, which can improve the construction efficiency.

[0066] The tower columns 21 are connected by flanges. The tower columns 21 are respectively connected to the horizontal bar 23 and the radial main cross bar 61 by flanges, with high connection strength. The end of the diagonal bar 22 has a U-shaped insertion plate 221, and the diagonal bar 22 is bolted to the tower column 21 through the U-shaped insertion plate 221, with high connection strength.

[0067] The tower crane adopts the model of TC7525-16D, and the attachment heights are located at 39.15m, 57.9m, 75.15m, 92.4m, 108.9m, 125.4m, and 141.9m respectively.

[0068] The construction method also includes the control of measurement accuracy;

[0069] Layout of verticality measurement points: For the measurement plane control of the tower body, the main axis method is adopted, and two orthogonal lines are used as the verticality control network for this project; Layout of elevation points:

[0070] The burial position of the bench mark is outside the deformation area of the building, and the distance from the building is not less than 20m;

[0071] Measurement method for the verticality of the outer tower column 21: The outer tower column 21 is a steel column inclined towards the tower center in the shape of a regular octagon. When measuring the verticality of the outer tower column 21, on the eight faces of the octagon formed by the tower body, four faces in the orthogonal direction are taken as the positions for measuring the verticality. The total station is set up on the two orthogonal axes around the tower body to measure the verticality of the steel column in the centripetal direction. The total station is set up at the axis control point of the tower body, aiming at another point in front of the axis, then locking the horizontal direction knob, and then using the total station to aim at the intersection position of the horizontal and inclined rods 22 on each floor of the tower body. If the intersection position of each floor's horizontal rod coincides with the aiming crosshair, then there is no deviation in the verticality of the tower body. If the intersection of the steel column and the aiming crosshair does not coincide, the standard direction can be set to 0 degrees, and the horizontal screw is finely adjusted to make the intersection of the steel column coincide with the crosshair, and the deviation angle is measured. Through coordinate calculation, the verticality deviation can be calculated. The calculation method is as follows:

[0072] Given that the coordinates of the measuring station are (a1, b1), the coordinates of the intersection of the steel column are (a2, b2), and the deviation angle is θ, then the verticality deviation is

[0073] Measure the verticality of the tower body on the other axis perpendicular to the tower body according to the above method, and the vector sum of the two measurement values is the overall verticality deviation of the tower body;

[0074] Measurement method for the horizontal elevation of the outer tower column 21: Eight points are evenly taken on the horizontal crossbars around the tower body horizontally for measuring the horizontal elevation of the crossbars; The total station is used to measure the height difference between the crossbar and the known bench mark on the ground, so as to calculate the horizontal elevation of the crossbars of the tower body;

[0075] Measurement method for the verticality of the shaft: The shaft of the tower body is in the form of a single-pipe structure, and the shaft columns are perpendicular to the ground; During measurement, the total station is set up on the two orthogonal axes, aiming at a vertical surface of the steel pipe for measurement;

[0076] Verticality measurement of 5 mast sections: The 5 mast sections range from 152 meters to 208 meters, with a total height of 56 meters. They are vertical quadrilateral lattice columns. During measurement, a total station is arranged on the mutually perpendicular axes of the 5 mast sections, and the measuring point is aimed at the center position of the cross bar of the 5 mast sections.

[0077] Different from the conventional TV transmission tower which is larger at the bottom and smaller at the top, this tower adopts a small waist-shaped structure. By changing the diameter at different elevations, the tower achieves a graceful curved shape. This unified structural unit also forms a rhythm and rhythm in visual perception. The overall image and form of the tower are more novel and unique due to the clear expression of the structural logic. The modern structural system and structural components are used to express the exquisite lines. The reasonable design of the steel structure, the design of the structural connection, and the design of the construction steps have met the strength requirements, safety requirements and use requirements of the structure, thus realizing the construction of the small waist radio and television transmission tower.

[0078] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that a technician familiar with the technical field can think of within the technical scope disclosed in the present invention should be covered within the protection scope of the present invention.

Claims

1. A construction method for the steel structure of a radio and television transmission tower, characterized in that: The following steps are included: Step 1: Deepen the design of the structural form of the lotus steel structure. The steel structure is deeply designed using TEKLA software. The steel structure includes a shaft column (1), a tower body (2), a transition section (3), a tower (4) and a mast (5). The shaft column (1) is a column located in the center. The tower body (2) includes a tower column (21), an inclined rod (22), a horizontal rod (23) and a partition layer (6). The tower column (21) is arranged vertically. The tower column (21) as a whole forms an arc structure in the form of a small waist. The inclined rod (22) is obliquely connected between the tower columns (21). The horizontal rod (23) is horizontally connected between the tower columns (21). The partition layer (6) includes a radial main cross bar (61) and a partition member rod (62). The radial main cross bar (61) is connected between the shaft column (1) and the tower column (21). The partition member rod (62) is connected between the tower columns (21) corresponding to the radial main cross bar (61). Step 2, construction in sections, a tower column (21) of one height is a layer of tower columns (21), after the first layer is provided with a partition layer (6), every three layers of tower columns (21) are provided with a partition layer (6), a connecting plate (7) is fixedly provided on the side of the tower column (21) provided with the partition layer (6) facing the shaft column (1), the partition member rod (62) is connected to the connecting plate (7), the tower columns (21) of the first layer are tower columns (21) of different heights, which are arranged alternately in sequence so that the nodes of the tower columns (21) of the first layer are arranged alternately and crosswise in the height direction; Step 3: Pre-buried anchor bolt construction: the tower column (21) has 24 foundations with pre-buried anchor bolts in the foundation, the depth of the pre-buried anchor bolts is 1-3 mm, the foundation of the shaft column (1) is a single pre-buried anchor bolt with a diameter of 2 m, and the pre-buried anchor bolts corresponding to the tower column (21) are evenly distributed in a ring around the pre-buried anchor bolts corresponding to the shaft column (1); Step 4: Deploy the tower crane according to the construction size and site; Step 5: Hoisting of the shaft column (1) and the tower column (21). 1) Use a total station to re-measure the shaft pre-buried anchor bolts and lay out the axis dimensions to ensure that the shaft steel column is accurately positioned, hoist the shaft column (1) to the plane position of the shaft column (1), command the tower crane to put the component in place, make the flange of the shaft column (1) butt joint with the pre-buried anchor bolt flange and check whether the installation angle is correct, and ensure that the axis marked on the lower end of the steel column coincides with the axis on the foundation anchor bolt flange plate; 2) After the machine room frame beam (8) is constructed, after the first section of the shaft column (1) is installed, the cantilever frame beam (41) between the shaft column (1) and the machine room under the tower is installed. After the machine room frame beam (8) is installed, the verticality of the shaft column (1) is measured. After the verticality meets the specification requirements, the connecting bolts of the cantilever frame beam (41) are tightened in time; 3) hoisting the first-floor tower column (21), installing the oblique rod (22) and the horizontal rod (23) on the first steel column on the first steel column, and then installing the first tower column (21), installing the oblique rod (22) and the horizontal rod (23) on the second steel column on the second steel column, and then installing the second tower column (21) and connecting it to the first tower column (21), until all the first-floor tower columns (21) are installed and closed; 4) Lift the second hoistway column (1), hoist and install the second hoistway column (1) on top of the first hoistway column (1); 5) Lift the second - layer tower column (21). First, lift one tower column (21) that is connected to the first - layer tower column (21) by a diagonal rod (22), and then successively lift the remaining second - layer tower columns (21) adjacent to it until all the tower columns (21) are installed and joined together; 6) Repeat steps 4) and 5) to successively lift the hoistway columns (1) and tower columns (21) at different heights. When constructing every third - floor multiples, construct the partition layer (6) on that third - floor multiple. Connect the partition structure rods between every three tower columns (21). The partition structure rods form a regular hexagon. Connect the tower columns (21) with the partition structure rods and the hoistway columns (1) through radial main cross - bars (61) until the installation reaches the tower (4); Step Six: Install the transition section (3). The transition section (3) includes a transition - section steel column (31), a transition - section cross - bar (32), and a transition - section diagonal rod (33). The bottom end of the transition - section steel column (31) is connected to the tower column (21), the top of the transition - section steel column (31) is connected to the top end of the hoistway column (1), the transition - section cross - bar (32) and the transition - section diagonal rod (33) are connected between adjacent transition - section steel columns (31), and the top end of the transition - section steel column (31) is connected to the mast (5). During construction, install the hoistway column (1) higher than the tower column (21), then lift the transition section (3). After the transition section (3) is lifted, install the tower column (21) higher than the hoistway column (1), and the construction of all tower columns (21) is completed; Step Seven: Lift the tower (4). The tower (4) includes a cantilever frame beam (41) and a channel steel (42). The cantilever frame beam (41) is connected between the hoistway column (1) and the tower column (21), the channel steel (42) is connected between the cantilever frame beams (41), and the cantilever frame beam (41) and the channel steel (42) form a grid - surface structure. Lay the checkered plate on the cantilever frame beam (41) and the channel steel (42) to complete the lifting of the tower (4). The tower (4) is set in two layers in the height direction; Step Eight: Lift the mast (5). The bottom section of the mast (5) is lifted by a tower crane and installed on the top end of the transition - section steel column (31) of the transition section (3), and the top section of the mast (5) is lifted by a gin pole.

2. The construction method of the steel structure of a radio and television transmission tower according to claim 1, characterized in that: A spiral - rising staircase (9) is fixedly installed on the hoistway column (1). When lifting the hoistway column (1), first fix the spiral - rising staircase (9) on the hoistway column (1) and then lift it.

3. A construction method for the steel structure of a radio and television transmission tower according to claim 2, characterized in that: The total height of the tower column (21) is 152m, the contour diameter at the bottom of the tower column (21) is 38.250m, the minimum contour diameter in the middle of the tower column (21) is 9.33m, the outward expansion at the top of the tower column (21) is 22mm. The two layers of the tower (4) are located at 139.6m and 147.8m respectively, and the top height of the mast (5) is 210.1m.

4. A construction method for the steel structure of a radio and television transmission tower according to claim 3, characterized in that: For the mast (5), the section from 152 - 168m is lifted by a tower crane, and the section from 168 - 210.1m is lifted by a gin pole.

5. A construction method for the steel structure of a radio and television transmission tower according to claim 4, characterized in that: In Step Six, the transition - section cross - bar (32) and the transition - section diagonal rod (33) are spliced on the ground and then lifted as a whole.

6. A construction method for the steel structure of a radio and television transmitting tower according to claim 5, characterized in that: The tower columns (21) are connected by flanges, and the tower columns (21) are respectively connected to the horizontal rods (23) and the radial main cross rods (61) by flanges.

7. A construction method for the steel structure of a radio and television transmission tower according to claim 6, characterized in that: The end of the diagonal rod (22) has a U-shaped insertion plate (221), and the diagonal rod (22) is bolted to the tower column (21) through the U-shaped insertion plate (221).

8. A construction method for the steel structure of a radio and television transmission tower according to claim 7, characterized in that: It also includes the tower crane attachment construction. The tower crane model is TC7525-16D, and the attachment heights are respectively at 39.15m, 57.9m, 75.15m, 92.4m, 108.9m, 125.4m, and 141.9m.

9. A construction method for the steel structure of a radio and television transmission tower according to claim 8, characterized in that: It also includes the measurement accuracy control; Layout of the verticality measurement points: For the measurement plane control of the tower body, the main axis method is adopted, and two orthogonal lines are used as the verticality control network for this project; Layout of elevation points: The burial position of the bench mark is outside the deformation area of the building, and the distance from the building is not less than 20m; Measurement method for the verticality of the outer tower column (21): The outer tower column (21) is a steel column inclined towards the tower center in a regular octagon shape. When measuring the verticality of the outer tower column (21), on the eight faces of the octagon formed by the tower body, four faces in the orthogonal direction are taken as the positions for measuring the verticality. The total station is set up on two orthogonal axes around the tower body to measure the verticality of the steel column towards the center direction. The total station is set up at the axis control point of the tower body, aiming at another point in front of the axis, then locking the horizontal direction knob, and then using the total station to aim at the intersection position of the horizontal and diagonal rods (22) of each layer of the tower body. If the intersection position of each layer of the cross rod coincides with the aiming crosshair, then there is no deviation in the verticality of the tower body. If the intersection of the steel column and the aiming crosshair does not coincide, the standard direction can be set to 0 degrees, and the horizontal screw is finely adjusted to make the intersection of the steel column coincide with the crosshair, and the deviation angle is measured. Through coordinate calculation, the verticality deviation can be calculated. The calculation method is as follows: Given that the coordinate of the measuring station is (a1, b1), the coordinate of the intersection of the steel column is (a2, b2), and the deviation angle is θ, then the verticality deviation is Measure the verticality of the tower body on another axis perpendicular to the tower body according to the above method, and the vector sum of the two measurement values is the overall verticality deviation of the tower body; Measurement method for the horizontal elevation of the outer tower column (21): Eight points are evenly taken on the horizontal cross rods around the tower body horizontally for measuring the horizontal elevation of the cross rods; The total station is used to measure the height difference between the cross rod and the known bench mark on the ground, so as to calculate the horizontal elevation of the cross rod of the tower body; Measurement method for the verticality of the shaft: The shaft of the tower body is in a single-pipe structure form, and the shaft columns are perpendicular to the ground; During measurement, the total station is set up on two orthogonal axes and aims at a vertical surface of the steel pipe for measurement; Measurement of the verticality of the mast (5) section: The mast (5) section ranges from 152 meters to 208 meters, with a total height of 56 meters, and is a vertical quadrilateral lattice column. During measurement, the total station is arranged on the axes perpendicular to each other of the mast (5) section for measurement, and the measuring point aims at the center position of the cross rod of the mast (5) section.

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