CN219826061U - Cable dome central support tower and operation platform comprehensive system - Google Patents

Abstract

The utility model relates to a cable dome central support tower and operation platform integrated system, which comprises a foundation base, a tower crane body and a construction operation platform, and is characterized in that: a lifting system and a tower crane lifting socket are arranged on the tower crane standard joint, the tower crane standard joint is arranged through the lifting system and the tower crane lifting socket, a tower crane standard joint introduction port is arranged on one side of the tower crane lifting socket, and a steel plate fixing cover is fixedly arranged on the upper end surface of the tower crane lifting socket; the construction operation platform includes girder, reinforcing secondary beam and platform steel sheet, and the girder is regular triangle overall arrangement, and the reinforcing secondary beam is including two sets of regular triangle endotheca formula overall arrangement structures and a set of 3 diagonal connection structure through three-way coupling mechanism, and the advantage is: the symmetrical drawknot installation method is suitable for large-scale net-shaped complex cable dome structures, and the middle stress member can be stable and firm, safe and reliable; the control of the elevation of the top construction operation platform is very accurate, and particularly plays a vital role in the overall construction quality of the large-span suspended engineering.

Description

Comprehensive system of cable dome central support tower and working platform

Technical field

The utility model belongs to the technical field of high-altitude installation and construction of independent cable dome components, and in particular relates to a comprehensive system of a cable dome central support tower and an operating platform.

Background technique

In recent years, with the development of society and the advancement of science and technology, people have continuously put forward new requirements for large-span spatial structures, which has forced people to create new structural forms to meet the needs of current society. Among the many types of long-span spatial structures, scholars in the engineering community have developed a brand-new structural form - the tensegrity cable dome structure. This structure has attracted the attention of the world with its novel shape, ingenious conception and economical cost. of attention. Once this structure came out, it quickly attracted great attention from the academic and engineering circles. The cable dome structure has been widely used due to its unparalleled structural form advantages. As a leader in modern space structure systems, it integrates new materials, new technologies, new processes and high efficiency. It is favored by architects for its light structure, unique shape and grand scale; it is known as one of the most famous modern space structures in the modern world. The highest achievement of space structure technology represents the development level of space structures in the world today and has good application value and development prospects.

Of course, with the birth of excellent building structural forms, it is also accompanied by appropriate high-level construction techniques to match its own construction technology; especially in the construction industry, it is more obvious, whether it is one or more aspects of materials, technology or craftsmanship. The innovation in all aspects will bring considerable challenges to construction. With regard to the current rapid development of rope formwork structures in the construction field, there are many types of development forms. Because they are flexible and changeable in terms of spatial shape, their tie-down structures have different forms; but at this stage, they are used in large-span space dimensions. Most buildings or structures use the middle inner ring to complete the top structure layout. For building structures that connect the entire high-altitude roof structure into a unified whole through the inner ring, the inner ring is installed with the ropes extending around it. Quality is the focus of controlling the overall roof structure; and the spatial location of the inner pull ring determines the quality of the subsequent overall installation and connection of the ropes and the difficulty of subsequent construction.

Based on a gymnasium project, the total construction area of this project is 17,100 square meters. The roof is an oval cable dome mold structure. The long axis of the oval structure is 102m and the short axis is 82m. The suspended height of the lowest point of the top core inner ring is about 23 meters, the inner ring is a cylindrical structure with a diameter of 4m and a height of 5.08m. Its load weight is about 27 tons. Currently, most of the conventional racks on the market are lightweight thin-walled steel pipe type brackets. This type of rack structure is light and easy to connect and install. It is simple and has a wide range of applications. However, this type of frame has limited load-bearing capacity and relatively low height adjustment flexibility. Combined with the existing construction conditions of this project, the existing light-weight thin-walled steel pipe type brackets on the market cannot meet the on-site construction requirements. Therefore, after joint research and decision by the Group Technology Center and the project technology department, it is very reasonable to use a tower hanger body to replace the ordinary light-weight thin-walled steel pipe type bracket frame. Firstly, because the tower hanger body itself has high support strength; secondly, the material selection is very convenient and is conducive to construction period control. In particular, the tower hanger body itself has a certain height adjustment capability, which is very suitable for the construction of this project.

When selecting a tower hanger body as the main supporting stress-bearing structure system, and meeting the on-site construction requirements, it is determined that three independent tower hanger bodies are needed and the relative distance between the frames should be controlled within the range of 7 to 8 meters. Ideally, this makes the gap span between the tower hanger bodies relatively large. If you want to erect an inner pull ring capable of carrying a concentrated load of 27 tons, you need to lay additional transversely dense stress-bearing members connected to any two tower hanger bodies, so that It forms an overall force-bearing system and is easy for construction and installation personnel to operate. It is necessary to lay an installation working platform on top of its transverse dense components, and the inner pull ring can be accurately installed through the working platform.

Utility model content

In order to solve the technical problems existing in the known technology, the utility model provides a comprehensive system of a cable dome central support tower and an operating platform.

This cable dome central support tower and operating platform comprehensive system is suitable for large and complex network cable dome structures. The symmetrical tie installation method can make the intermediate stressed components stable, firm, safe and reliable. The direct starting point of its process construction method is to comprehensively utilize the load-bearing capacity of the existing tower crane lifting equipment frame itself, as well as its advantage of being able to flexibly adjust the height as a support frame to complete the current construction needs. The height control of the top construction platform is very precise. Taking advantage of the tower crane's built-in lifting system, the integrated system of the central support tower and construction platform can achieve height control within a range of 2.8 meters, especially for long-span suspended projects. Overall construction quality can play a vital role.

The technical solution adopted by this utility model to solve the technical problems existing in the known technology is:

The comprehensive system of the central support tower and operating platform of the cable dome includes a basic base, three groups of tower crane fuselages distributed in a triangle, and a construction operating platform fixed on the top of the tower crane fuselage. The tower crane fuselage includes a tower crane base section and a tower crane standard section. and lattice steel positioning rods. The base section of the tower crane is fixed with a plurality of standard sections of the tower crane arranged vertically from bottom to top through fasteners. Between the three groups of tower crane fuselages, there are Lattice steel positioning rod. The construction work platform includes platform steel plates, main beams, reinforced secondary beams and protective railings. It is characterized by:

The tower crane standard section is equipped with a lifting system and a tower crane lifting sleeve, and the tower crane standard section used to increase the height of the tower crane body is installed through the jacking system and the tower crane lifting sleeve. One side of the tower crane lifting sleeve is There is a tower crane standard section introduction inlet, and a steel plate fixed cover is fixed on the upper end of the tower crane ceiling lifting sleeve;

The main beams of the construction work platform are arranged in an equilateral triangle, and each main beam is respectively set up on a steel plate fixed cover on the upper end of the tower crane lifting sleeve. The reinforced secondary beams include two groups of equilateral triangle inner nested layout structures and one group. 3 diagonally connected structures through a three-way connection mechanism. The main beam is fixed to a steel plate fixed cover provided on the upper end of the tower crane lifting sleeve through a platform steel plate fastening mechanism. The platform steel plate is fixed on the reinforced secondary beam. Plane, protective railings and climbing escalators are provided around the steel plate of the platform, and a central pull ring for installing a cable dome is provided at the center of the working platform.

This utility model can also adopt the following technical solutions:

Preferably, the two sets of reinforced secondary beams are in an equilateral triangular inner-nested layout, with each corner of the two sets of equilateral triangular reinforced secondary beams respectively mounted on each edge of the main beam, and the other set is connected through a three-way connection mechanism. One end of the three diagonally connected reinforced secondary beams is fixedly connected to each other, and the other end is overlapped and fixed to each side of the main beam to form a six-pointed star-shaped horizontal solid and stable force-bearing structural system.

Preferably, the platform steel plate fastening mechanism for fastening the main beam and the steel plate fixed cover includes a hexagonal screw stabilizing mechanism and a square plate screw stabilizing mechanism.

Preferably, the hexagonal screw stabilizing mechanism includes an upper pressure ring plate, a lower pressure ring plate, a gasket, a round steel pressure ring and a hexagonal screw. The hexagonal screw is equipped with a round steel pressure ring and a lower pressure ring in sequence from bottom to top. The round steel pressure ring, the lower pressure ring plate and the upper pressure ring plate are fixed to the steel plate fixed cover through hexagonal nuts.

Preferably, the square plate screw stabilizing mechanism includes an upper pressure ring plate, a lower pressure ring plate, a gasket, a round steel pressure ring and a square plate screw. The square plate screw is equipped with a round steel pressure ring and a lower pressure ring in sequence from bottom to top. Pressure ring plate and upper pressure ring plate, the round steel pressure ring, lower pressure ring plate and upper pressure ring plate are fixed by hexagonal nuts and steel plate fixed covers.

Preferably, the U-shaped fixing buckle includes a rectangular clamping plate, a U-shaped bolt and a fastening bolt. Both ends of the U-shaped bolt are fixed by fastening bolts, and the U-shaped fixing buckle is used to implement the main beam and the reinforced secondary beam. of fixed connection.

Preferably, the three-way connection mechanism includes directional connection steel plates and high-strength bolts, and the three-way connection mechanism implements mutual diagonal fixation of a group of reinforced secondary beams.

The advantages and positive effects of this utility model are: because this utility model adopts the above technical solution, that is, the support structure is mainly based on the tower crane body, and its construction work platform is mainly composed of I-beam main beams, square steel secondary beams and platforms Composed of steel plates; the direct starting point of the structure and construction method of this utility model is to comprehensively utilize the carrying capacity of the existing tower crane lifting equipment frame itself, as well as its advantage of being able to flexibly adjust the height as a support frame to complete the current construction needs; and The above-mentioned construction method also has outstanding advantages, such as convenient material selection, sufficient market supply, and the frame itself is very strong. This structure and construction method can significantly reduce the scope of construction operations when erecting frames of the same height. Different construction environments can According to the actual design conditions, appropriately increase or decrease the number of standard sections of the tower crane to meet the height requirements of the frame itself. The selection of steel building materials for the construction work platform is mainly based on the engineering needs of this project. Since the relative distance between the tower hanger bodies must be controlled at 7 to 8 meters, this results in a relatively large gap span in the middle. If it is to be erected, it can carry 27 The inner pull ring with a concentrated load of 100,000 tons needs to be laid with transverse tiled dense stress-bearing components.

This utility model uses three groups of tower crane fuselages as the support system and has the following advantages: first, the three tower crane fuselages can be connected in sequence through lattice steel positioning rods of the same specifications to form a unified equilateral triangle support frame body, and The equilateral triangle itself is extremely stable, which is conducive to improving the overall stability of the support frame and the safety of construction operations. Through analysis, the lattice steel positioning rods can meet the overall safety needs of the support frame by tightening it every 20 meters higher. The construction work platform selects 3 I-beams and sets them on the fixed cover plates of the 3 sets of tower ceiling risers as the main beams, and then lays a layer of equilateral triangular intensified secondary beams composed of square steel on the upper layer. Finally, a layer of 5mm shaped steel plates is laid flat on the upper part of the secondary beam, and a safety steel pipe handrail is installed around it to ensure safe construction conditions. In addition, for the first time, the tower crane body is used as the supporting foundation of the high-altitude construction platform, and the triangular inner nesting encryption method is adopted, which can greatly improve the safety and reliability of the construction work platform and reduce the distortion of the construction work platform due to load. This technical solution is convenient for material selection and market procurement. In particular, the installation and disassembly process of the central pull ring support structure is simple, the turnover is convenient, the support frame body occupies a small area and has a strong load-bearing capacity.

This cable dome central support tower and operating platform comprehensive system is suitable for large and complex network cable dome structures. The symmetrical tie installation method can make the intermediate stressed components stable, firm, safe and reliable. The direct starting point of its process construction method is to comprehensively utilize the load-bearing capacity of the existing tower crane lifting equipment frame itself, as well as its advantage of being able to flexibly adjust the height as a support frame to complete the current construction needs. The height control of the top construction platform is very precise. Taking advantage of the tower crane's built-in lifting system, the integrated system of the central support tower and construction platform can achieve height control within a range of 2.8 meters, especially for long-span suspended projects. Overall construction quality can play a vital role.

Description of the drawings

Figure 1 is a schematic diagram of the overall structure of the utility model;

Figure 2 is a schematic structural diagram of the base of the present utility model;

Figure 3 is a top view of the construction work platform of the present utility model;

Figure 4 is a schematic diagram of the fixed structure of the main beam, secondary beam and reinforced secondary beam in Figure 1;

Figure 5 is a schematic structural diagram of the U-shaped fixing buckle of the present invention;

Figure 6 is a schematic structural diagram of the hexagonal screw stabilizing mechanism of the present utility model;

Figure 7 is a schematic structural diagram of the square plate screw stabilizing mechanism of the present utility model;

Figure 8 is a schematic structural diagram of the three-way connection mechanism of the present utility model;

Figure 9 is a schematic diagram of the construction operation status of installing a tower crane standard section on the tower crane body according to the present invention.

In the picture: 1. Construction work platform; 1-1. Platform steel plate; 1-2. Main beam; 1-3. Reinforced secondary beams; 1-4. Protective railings and handrails; 1-5. Climbing escalator; 2. Three Directional connecting mechanism; 2-1. Directional connecting steel plate; 2-2. High-strength bolts; 3. U-shaped fixing buckle; 3-1. Rectangular clamping plate; 3-2. U-shaped bolts; 3-3. Fastening Bolts; 4. Platform steel plate fastening mechanism; 4-1. Hexagonal screw stabilizing mechanism; 4-2. Square plate screw stabilizing mechanism; 4-3. Upper pressing ring plate; 4-4. Lower pressing ring plate; 4-5 , gasket; 4-6, round steel pressure ring; 4-7, hexagonal screw; 4-8, square plate screw; 5, tower crane standard section; 6, tower crane foundation section; 6-1, high-strength fixed column bolts; 7. Tower crane lifting sleeve; 7-1. Steel plate fixed cover; 7-2. Inlet; 8. Lattice steel positioning rod; 9. Foundation base; 10. Jacking system; 11. Internal pull ring.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model more clear, the utility model will be further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention and are not intended to limit the present invention.

Please refer to Figure 1-Figure 9,

The comprehensive system of the central support tower and working platform of the cable dome includes a basic base 9, three groups of tower crane fuselages distributed in an equilateral triangle, and a construction working platform 1 fixed on the top of the tower crane fuselage. The tower crane fuselage includes a tower crane base section 6, Tower crane standard sections 5 and lattice steel positioning rods 8. A plurality of tower crane standard sections 5 arranged vertically from bottom to top are fixed on the base 9 of the tower crane base section through fasteners. On the fixed tower crane base section 6 When pre-embedding the high-strength fixed column bolts 6-1, the vertical depth and vertical deviation of the high-strength fixed column bolts should be ensured according to the location of the tower crane body. and the length of the external leakage thread to avoid unnecessary engineering accidents caused by instability of the tower crane fuselage caused by the unstable bottom of the fixed tower crane foundation section. There are lattice steel positioning rods 8 used for mutual positioning between the three groups of tower crane fuselages. The lattice steel connecting rods are connected and fixed with the tower crane foundation sections in pairs to improve the overall stability of the tower crane fuselage. And be prepared for the later installation of the tower crane standard section.

The construction work platform includes platform steel plates 1-1, main beams 1-2, reinforced secondary beams 1-3 and protective railings and handrails 1-5. The main beams 1-2 of the construction work platform are made of I-beams and are arranged in an equilateral triangle. Each main beam is respectively set up on the steel plate fixed cover 7-1 on the upper end of the tower crane lifting sleeve. In the equilateral triangle layout There are three sets of reinforced secondary beams 1-3 made of square steel fixed and overlapped on the main beam. The reinforced secondary beams include two sets of equilateral triangle inner nested layout structures and a set of 3 beams fixed to each other diagonally through a three-way connection mechanism. connection structure. The two sets of reinforced secondary beams are arranged in an equilateral triangular inner nesting type. Each corner of the two sets of equilateral triangular reinforced secondary beams are fixed and overlapped on each side of the main beam through U-shaped fixed buckles 3, and the other group is connected through One end of the three reinforced secondary beams connected diagonally by the three-way connecting mechanism 2 is fixedly connected to each other, and the other end is overlapped and fixed with each side of the main beam to form a six-pointed star-shaped horizontal solid and stable force-bearing structural system. The main beam is fixed to the steel plate fixing cover 7-1 provided on the upper end of the tower crane lifting sleeve through the platform steel plate fastening mechanism 4. The platform steel plate 1-1 is laid and fixed on the upper plane of the reinforced secondary beam. On the platform There are protective railings 1-5 and climbing escalators 1-6 around the steel plate. The center of the working platform is provided with a central pull ring 11 for installing a cable dome.

The tower crane standard section 5 is equipped with a lifting system 10 and a tower crane lifting sleeve 7, and a tower crane standard section for increasing the height of the tower crane body is installed through the jacking system and the tower crane lifting sleeve. The tower crane ceiling lifting sleeve A tower crane standard section inlet 7-2 is provided on one side of the section, and a steel plate fixed cover 7-1 is fixed on the upper end face of the tower crane lifting sleeve section.

Specifically, the platform steel plate fastening mechanism 4 for fastening the main beam and the steel plate fixed cover includes a hexagonal screw stabilizing mechanism 4-1 and a square plate screw stabilizing mechanism 4-2.

Specifically, the hexagonal screw stabilizing mechanism 4-1 includes an upper pressure ring plate 4-3, a lower pressure ring plate 4-4, a gasket 4-5, a round steel pressure ring 4-6 and a hexagonal screw 4-7. The hexagonal screw is equipped with a round steel pressure ring, a lower pressure ring plate and an upper pressure ring plate in order from bottom to top. The round steel pressure ring, lower pressure ring plate and upper pressure ring plate are fixed to the steel plate cover 7 through a hexagonal nut. -1 fixed.

Specifically, the square plate screw stabilizing mechanism 4-2 includes an upper pressure ring plate 4-3, a lower pressure ring plate 4-4, a gasket 4-5, a round steel pressure ring 4-6 and a square plate screw 4- 8. A round steel pressure ring, a lower pressure ring plate and an upper pressure ring plate are installed on the square plate screw from bottom to top. The round steel pressure ring, lower pressure ring plate and upper pressure ring plate are fixed to the steel plate through hexagonal nuts. Cover fixed.

Specifically, the U-shaped fixing buckle 3 includes a rectangular clamping plate 3-1, a U-shaped bolt 3-2 and a fastening bolt 3-1. Both ends of the U-shaped bolt pass through the rectangular clamping plate and pass through the rectangular clamping plate. Fasten the bolts and use U-shaped fixing buckles to secure the main beam and reinforced secondary beam.

Specifically, the three-way connection mechanism 2 includes a directional connecting steel plate 2-1 and a high-strength bolt 2-2. The directional connecting steel plate is composed of three channel steels welded, and one ends of the three channel steels are welded to each other. Together, an angle of 120° is formed between two adjacent channel steels, and then a set of reinforced secondary beams are connected diagonally to each other through the three-way connection mechanism.

The working principle of this utility model is:

1. Pre-embed the high-strength fixed foot bolts 6-1. During the construction of the foundation base 9, first determine the vertical projection position of the inner pull ring through the architectural drawings, and then accurately locate the projection center point of the inner pull ring through the total station. The support frame is set up with the center point of the projection of the inner pull ring as the reference point. In order to ensure that the loads on the three tower crane fuselages acting as the support frame are as balanced as possible and to improve the overall stability of the support frame, the support frame should be set up when erecting the support frame. The overall center position of the support frame coincides with the projection center point of the inner pull ring. According to the height of the support frame erection and the operating range of the construction work platform to be installed on the top, calculations were made to arrange the three tower crane fuselages serving as support frames in an equilateral triangle around the reference point and make the adjacent tower crane fuselages A distance of 7 to 8 meters is ideal. Then, according to the position of the tower crane body, embed the high-strength fixed column bolts 6-1 respectively. When pre-embedding the high-strength fixed column bolts, ensure that the vertical depth of the high-strength fixed column bolts is greater than 40 cm and vertical. The deviation is ±3 mm and the length of the leaking thread should be kept above 6.5 cm to avoid unnecessary engineering accidents caused by instability of the tower hanger body due to unstable bottom.

2. Install and fix the tower crane foundation section 6. When the high-strength fixed column foot bolts are pre-embedded and the strength of the foundation base reaches the design requirements, the tower crane foundation section that fixes the tower crane body can be installed first according to the project needs, and the verticality of the tower crane foundation section can be checked at the same time. Whether the height meets ±3 mm and whether the elevations of the four sides of the tower crane foundation section are uniform are used to determine whether the construction quality requirements are met. If the size deviation of individual tower crane column feet and embedded bolts is too large, it can be appropriately dealt with by adding column foot spacers. To achieve complete uniformity of elevations on the four sides of the tower crane foundation section, ensuring that the overall construction quality of the tower crane foundation section installation meets construction requirements. At the same time, the lattice steel positioning rods 8 are connected to the tower crane foundation sections in pairs, that is, the two adjacent tower crane foundation sections are connected and fixed to each other through the lattice steel positioning rods to improve the overall stability of the tower crane body and can provide Be prepared for the later installation of the tower crane standard section.

3. Install the standard section 5 of the tower crane. When the height of the construction platform 1 needs to be adjusted, the three groups of tower crane bodies should be jacked up synchronously. First, install the standard section 5 of the tower crane upwards in sequence through the truck crane on the base section 6 of the tower crane; when the height of the construction platform 1 needs to be adjusted, When the truck crane reaches the maximum lifting and installation height, the tower crane lifting sleeve 7 is then installed on the tower crane standard section at the uppermost end of the tower crane fuselage through the truck crane. When the initial installation height of the tower crane fuselage does not reach the set height of the predetermined construction platform, Then fix the hydraulic jack of the jacking system 10 to the tower crane standard section at the uppermost end of the tower crane fuselage. At this time, it is necessary to use an external independent tower crane, a hydraulic jack and a tower crane lifting sleeve to move the tower crane standard section through the tower crane lifting sleeve. The tower crane standard section introduction port 7-2 on the side is pulled and installed to the top of the tower crane standard section at the uppermost part of the tower crane fuselage. When installing a tower crane standard section, the trunnions (or hooks) on both sides of the hydraulic jack should be fixed in advance to the support steps (or standard section beams) of the penultimate tower crane standard section, and then the tower crane ceiling lifting sleeve should be pushed through the hydraulic jack. Lift upward. When the lifting height of the tower crane lifting sleeve reaches the standard section of the installed tower crane, stop the lifting operation of the hydraulic jack, and then lift the tower crane standard section through the independent tower crane to the tower crane standard section introduction port 7- on the side of the tower crane lifting sleeve. 2. At this time, the installer will use the traction device to pull it from the outside of the tower crane standard section introduction port of the tower crane jacking section to the inside of the tower crane jacking section, and then pull the four additional columns of the tower crane standard section respectively. Align the four columns at the upper end of the original top tower crane standard section one by one, and then use special high-strength bolts to firmly connect the four opposite columns. After the installation quality inspection is passed, retract the piston rod of the hydraulic jack so that the trunnions (or hooks) on both sides of the hydraulic jack base move upward with the piston rod of the hydraulic jack until they are moved to the installed tower crane standard section support steps. , pressurize the hydraulic jack again so that it continues to lift and push the tower crane ceiling lifting sleeve to move upward. Repeat the above process of installing the tower crane standard section, so that the tower crane body can be effectively raised to the height required by the construction.

When the tower crane body reaches the predetermined height required for construction, reduce the pressure of the hydraulic jack to 0 pressure, then remove the hydraulic jack device, and finally connect the fixed end of the top of the tower crane lifting sleeve to the installed tower crane standard section. The top poles are fixedly connected with high-strength bolts. At this time, in order to ensure the safety of the overall force-bearing system of the tower crane fuselage, a set of lattice steel positioning rods is installed every 15 to 20 meters away from the first set of lattice steel positioning rods 8 at the base section of the tower crane. To achieve strengthened fixation to ensure the overall stability of the tower crane body frame.

4. Install the construction work platform 1. When the height of the three tower cranes is raised to the construction required elevation, the construction work platform can be built. First, use an external tower crane to transport the three I-beam main beams 1-2 of model 40a to the top of the tower crane lifting sleeves, and set them up on the upper end surfaces of the two adjacent tower crane lifting sleeves. On the steel plate fixed cover 7-1, the three main beams are placed in an equilateral triangle shape as a whole, and the installer fixes the three main beams on the steel plate fixed cover respectively through the platform steel plate fastening mechanism 4. The platform steel plate fastening mechanism includes a hexagonal screw stabilizing mechanism 4-1 and a square plate screw stabilizing mechanism 4-2; the hexagonal screw stabilizing mechanism is suitable for drilling holes on the steel plate fixed cover to secure the three main beams respectively. Fixing, the square plate screw stabilizing mechanism is suitable for fixing the three main beams respectively by welding on the steel plate fixing cover. When fixing by drilling, the hexagonal screws 4-7 can be fixed to the main beam through the round holes drilled on the steel plate fixing cover according to the structure shown in Figure 6; first, put the gaskets 4-5 on the hexagonal screws 4 -7, then pass the hexagonal screw 4-7 through the hole drilled in the steel plate fixed cover 7-1 from bottom to top, and then insert the lower pressure ring plate 4-4, the upper pressure ring plate 4-3 and the gasket. 4-5 are respectively put on the hexagonal bolts 4-7, and then the round steel pressure ring 4-6 is inserted between the lower pressure ring plate 4-4 and the upper pressure ring plate 4-3. At the same time, the round steel pressure ring 4-6 6 Fasten the lower flange of the I-beam main beam, and finally tighten the nut so that the I-beam main beam can be firmly fixed on the steel plate fixed cover.

When welding is used for fixation, the structure shown in Figure 7 can be used, and the bottom of the square plate screw is directly fully welded to the steel plate fixed cover to fix the main beam; first, the square plate of the square plate screw 4-8 and the steel plate fixed cover 7-1 After fully welding the connection, insert the upper pressure ring plate and gasket 4-5 onto the square plate screw 4-8 at once, and then insert the round steel pressure ring 4-6 into the lower part of the upper pressure ring plate 4-3. The round steel pressure rings 4-6 fasten the lower flange of the I-beam main beam, and finally tighten the nut so that the I-beam main beam can be firmly fixed on the steel plate fixed cover.

After the main beams are fixed and installed, three sets of reinforced secondary beams need to be fixed and overlapped on the three main beams to increase the overall density of the horizontal stress-bearing members. The three sets of reinforced secondary beams include two sets of inner nested beams in the form of a regular triangle. The layout and a set of structures are fixed to each other end-to-end through a three-way connection mechanism. First, each corner of the two sets of reinforced secondary beams are overlapped and fixed on each side of the main beam through U-shaped fixing buckles 3. The layout method of the two sets of reinforced secondary beams is to connect two equilateral triangles with different side lengths. First, make their respective center points coincide with each other, and then make all the corners in the same direction and all sides opposite to each other. At the same time, one end of another set of three reinforced secondary beams is fixed to each other through the three-way connecting mechanism 2, and the other end is fixed to the corners of the main beam respectively. This can improve the overall load-bearing stability of the reinforced secondary beams and provide better conditions for later laying. The platform steel plate construction provides technical foundation and safety guarantee, and finally effectively connects the main beam and reinforced secondary beam to form a six-pointed star-style horizontal stress structure system. After the main beam and the reinforced secondary beam are fixed, the installer needs to cover the top of the main beam and the reinforced secondary beam with platform steel plates 1-1 and protective railings 1-5, and leave a climbing escalator 1-5 on the tower crane body. 6. Make it easy for construction workers to pass.

5. Assembling the inner pull ring 11: Since the overall load of the inner pull ring is too large, it cannot be transported to the top of the construction work platform as a whole. Therefore, the inner pull ring needs to be decomposed into multiple components and transported to the top of the work platform in batches, and then technical The personnel welded and assembled one by one according to the construction drawings. In this way, the heavy-loaded inner pull ring can be lifted to a high altitude position for the connection and installation construction of the roof rope structure. The main feature of why step 4 is completed before step 5 is implemented is to first lift the construction work platform of the tower hanger body to the end point or the elevation near the end point, then build the construction work platform, and then reassemble the inner pull ring on the high-altitude platform , this construction sequence is mainly to reduce the construction difficulty of the tower crane fuselage jacking process and the pressure on the jacking system. Since the support platform of the tower hanger body itself has an automatic lifting function, steps 4 and 5 can also be constructed upside down in this construction sequence. When the elevation of the tower crane support frame is relatively low, the construction work platform is first built, and then the inner pull rings are assembled. Finally, through the characteristics of the lifting function of the tower crane support system itself, the three tower crane bodies are lifted together with the construction work platform simultaneously until it reaches until the required height for construction. This construction method can avoid the danger of technicians working at high altitude during installation, but it also increases the difficulty of the overall lifting and installation of the tower hanger body. Therefore, the specific implementation method should be selected based on the actual conditions on site.

The embodiments described in the drawings of the present utility model are exemplary and are only used to explain the present utility model and cannot be understood as limitations of the present utility model.

Claims (7)

1. A comprehensive system of cable dome central support towers and working platforms, including a basic base, three groups of tower crane fuselages distributed in a triangle, and a construction working platform fixed on the top of the tower crane fuselage. The tower crane fuselage includes a tower crane foundation section. , tower crane standard sections and lattice steel positioning rods. A plurality of tower crane standard sections arranged vertically from bottom to top are fixed on the base section of the tower crane through fasteners. Between the three groups of tower crane bodies, there are The construction work platform includes a platform steel plate, a main beam, a reinforced secondary beam and a protective railing handrail, and is characterized by: The tower crane standard section is equipped with a lifting system and a tower crane lifting sleeve, and the tower crane standard section used to increase the height of the tower crane body is installed through the jacking system and the tower crane lifting sleeve. One side of the tower crane lifting sleeve is There is a tower crane standard section introduction inlet, and a steel plate fixed cover is fixed on the upper end of the tower crane ceiling lifting sleeve; The main beams of the construction work platform are arranged in an equilateral triangle, and each main beam is respectively set up on a steel plate fixed cover on the upper end of the tower crane lifting sleeve. The reinforced secondary beams include two groups of equilateral triangle inner nested layout structures and one group. 3 diagonally connected structures through a three-way connection mechanism. The main beam is fixed to a steel plate fixed cover provided on the upper end of the tower crane lifting sleeve through a platform steel plate fastening mechanism. The platform steel plate is fixed on the reinforced secondary beam. Plane, protective railings and climbing escalators are provided around the steel plate of the platform, and a central pull ring for installing a cable dome is provided at the center of the working platform. 2. The comprehensive system of cable dome central support tower and working platform according to claim 1, characterized in that: the two sets of reinforced secondary beams are in an equilateral triangular inner nested layout, and the two sets of equilateral triangular reinforced secondary beams are arranged each time. The two corners are respectively installed on each side of the main beam, and another set of three reinforced secondary beams are connected diagonally through a three-way connection mechanism, one end of which is fixedly connected to each other, and the other end is overlapped and fixed with each side of the main beam to form a The six-pointed star-shaped horizontal solid and stable force-bearing structural system. 3. The comprehensive system of cable dome central support tower and working platform according to claim 1, characterized in that: the platform steel plate fastening mechanism for fixing the main beam and the steel plate fixed cover includes a hexagonal screw stabilizing mechanism and a square screw. Plate screw stabilizing mechanism. 4. The comprehensive system of cable dome central support tower and working platform according to claim 3, characterized in that: the hexagonal screw stabilizing mechanism includes an upper pressure ring plate, a lower pressure ring plate, a gasket, a round steel pressure ring and Hexagonal screw. The hexagonal screw is equipped with a round steel pressure ring, a lower pressure ring plate and an upper pressure ring plate in order from bottom to top. The round steel pressure ring, lower pressure ring plate and upper pressure ring plate are connected to the steel plate through the hexagonal nut. The fixed cover is fixed. 5. The comprehensive system of cable dome central support tower and working platform according to claim 3, characterized in that: the square plate screw stabilizing mechanism includes an upper pressure ring plate, a lower pressure ring plate, a gasket, and a round steel pressure ring. And the square plate screw, the square plate screw is equipped with a round steel pressure ring, a lower pressure ring plate and an upper pressure ring plate in order from bottom to top. The round steel pressure ring, lower pressure ring plate and upper pressure ring plate pass through the hexagonal nut Fixed with steel plate fixing cover. 6. The comprehensive system of cable dome central support tower and working platform according to claim 2, characterized in that: it also includes a U-shaped fixing buckle, and the U-shaped fixing buckle includes a rectangular clamping plate, a U-shaped bolt and a fastener. The two ends of the U-shaped bolt are fixed by fastening bolts, and the main beam and the reinforced secondary beam are fixed through the U-shaped fixing buckle. 7. The comprehensive system of cable dome central support tower and working platform according to claim 1, characterized in that: the three-way connection mechanism includes directional connection steel plates and high-strength bolts, and a set of three-way connection mechanisms is implemented through the three-way connection mechanism. Strengthen the mutual diagonal fixation of secondary beams.