Stay wire mast tower and hoisting construction process thereof

Abstract

The invention discloses a stay wire mast tower and a hoisting construction process thereof, and relates to the field of stay wire mast towers, and the hoisting construction process comprises the following steps: S1, completing ground assembly of each tower section; s2, the base, the bottom section and part of the standard sections are hoisted; S3, a heavy external climbing tower crane is hoisted; S4, the heavy external climbing tower crane climbs automatically; and S5, the remaining tower sections and the tower head are hoisted. According to the method, the whole tower section is hoisted by adopting the heavy external climbing tower crane, and the rated hoisting weight is 10 tons. The workload of aloft work is reduced, the safety risk is greatly reduced, and the quality control difficulty and risk points are reduced. After the whole iron tower reaches the acceptance standard and becomes a rigid body, the whole iron tower is hoisted, and the quality problem is fundamentally controlled. Compared with a traditional scattered hoisting construction technology, the construction technology for hoisting the uniform-section stay wire mast tower in a whole section mode through the heavy external tower climbing machine has the obvious advantages of reducing safety risks and improving installation quality and installation work efficiency, and is a feasible construction technology convenient to popularize.

Description

Technical Field

[0001] The invention relates to the field of guyed mast towers, in particular to a guyed mast tower and a hoisting construction process thereof. Background Art

[0002] A guyed mast tower refers to a column-type structure used to support and position antennas, detectors, payloads and other equipment in the aerospace field. It is mainly used for the control and navigation of spacecraft. Due to its high overall height and heavy weight, it needs to be hoisted in multiple sections during installation. The traditional hoisting solution is the traditional internal suspension holding rod and the light crawling holding rod loose parts lifting solution. It is a tool used for tower section construction. Its design allows the holding rod to be suspended inside the tower section and fixed to the four main materials of the tower section by guy wires. However, its hoisting weight is only 2 to 3 tons, and it mainly relies on high-altitude operations to assemble the tower in parts, which increases the high-altitude operation tasks, increases the safety risks of high-altitude operations, and increases the difficulty and risk points of quality control, resulting in problems such as overall twisting and irregular tilting of the tower after construction, which cannot be handled. The construction period is long, with an average construction period of about 80 days. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a guyed mast tower and a hoisting construction process thereof in view of the deficiencies of the above-mentioned prior art.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A hoisting construction process for a guyed mast tower comprises the following steps:

[0006] S1. Complete the ground assembly of each tower section component;

[0007] S2. Hoist the base, bottom section and part of the standard section: hoist the base to a suitable position using a truck crane, then hoist the bottom section onto the base, and connect the base and bottom section via flanges and bolts; then hoist part of the standard section to the installation position on the bottom section using a truck crane for connection and fixation;

[0008] S3. Hoisting the heavy-duty external tower climbing machine: hoist the heavy-duty external tower climbing machine assembled on the ground to the installation position on the tower section assembly by using a truck crane. The outer sleeve and the inner sleeve of the tower climbing machine are clamped on the supporting plate of the tower section assembly through the bracket, and are clamped on the main rod of the tower section assembly through the climbing claw;

[0009] S4. Self-climbing of the heavy-duty external tower climbing machine: After the tower section assembly is hoisted to a certain height, the heavy-duty external tower climbing machine needs to self-climb; when the outer sleeve of the tower climbing machine is lifted, the outer sleeve of the tower climbing machine is connected to the motorized capstan on the ground, the bracket of the outer sleeve of the tower climbing machine and the connection between the tower section and the climbing claw are removed, and the machine is lifted by the motorized capstan on the ground. After lifting to the upper tower section, the bracket is engaged with the support plate and connected to the main pole of the tower section assembly through the climbing claw; when the inner sleeve of the tower climbing machine is lifted, the inner sleeve of the tower climbing machine is connected to the motorized capstan on the ground, the bracket of the inner sleeve of the tower climbing machine and the connection between the tower section and the climbing claw are removed, and the machine is lifted by the motorized capstan on the ground. After lifting to the upper tower section, the bracket is engaged with the support plate and connected to the main pole of the tower section assembly through the climbing claw;

[0010] S5. Hoist the remaining tower sections and tower heads: The hook on the boom of the heavy-duty external climbing tower crane is connected to the tower sections and tower heads to be installed. The tower sections and tower heads to be installed are hoisted to the installation position through the power system and spliced ​​with the installed tower sections.

[0011] A guyed mast tower comprises a tower section assembly and a guy rope assembly;

[0012] The tower section assembly includes a base, a bottom section, several standard sections, a top section and a tower head; the base, the bottom section, several standard sections, the top section and the tower head are arranged in sequence from bottom to top, and the tops of the bottom section, the standard section and the top section are all provided with a rope section connected to the rope assembly, the rope assembly is arranged obliquely, one end of the rope assembly is connected to the rope section, and the other end is connected to the ground; the rope assembly includes a standard rope and a top rope; wherein, one end of the standard rope is connected to the rope section of the standard section and the bottom section, and there are three standard ropes connected to the rope sections of the standard section and the bottom section, which are evenly arranged at a circumferential interval of 120°, and the elevation angle formed by the standard rope and the tower section assembly is 45°; the top rope is connected to the rope section of the top section, and there are 12 top ropes connected to the rope section of the top section, which are evenly arranged at a circumferential interval of 30°, and the elevation angle formed by the top rope and the tower section assembly is 43°.

[0013] As a further preferred embodiment of the present invention, the base, bottom section, standard section, rope section and top section are all detachably connected via flanges.

[0014] As a further preferred embodiment of the present invention, supporting plates are welded to the bottom section, the standard section and the top section.

[0015] As a further preferred embodiment of the present invention, it also includes a heavy-duty external tower climbing machine; the heavy-duty external tower climbing machine includes an outer shell of the tower climbing machine, an inner shell of the tower climbing machine, a boom and a power system; the outer shell of the tower climbing machine is nested on the outside of the inner shell of the tower climbing machine, the outer shell of the tower climbing machine and the inner shell of the tower climbing machine are both detachably connected to the tower section assembly, the boom is connected to the top of the inner shell of the tower climbing machine, and the power system is connected to the hook on the boom to provide it with lifting power.

[0016] As a further preferred embodiment of the present invention, the bottom section, standard section and top section of the tower section assembly each include three main rods spliced ​​in sequence, and the cross-section of the tower section assembly is an equilateral triangle with a width of 2.5 m.

[0017] As a further preferred embodiment of the present invention, the inner sleeve and the outer sleeve of the tower climbing machine are both provided with a bracket and a climbing claw; the inner sleeve and the outer sleeve of the tower climbing machine are clamped on the supporting plate through the bracket, and are clamped on the main rod of the tower section assembly through the climbing claw.

[0018] The present invention has the following beneficial effects:

[0019] The present invention adopts a heavy-duty external climbing tower crane to hoist the tower section as a whole, with a rated hoisting weight of 10 tons. The whole section of the tower is assembled on the ground, and the bolt tightening, horizontality and verticality are inspected and accepted on the ground. The workload of high-altitude operations is reduced, the safety risk is greatly reduced, and the difficulty and risk points of quality control are reduced. After the whole section of the tower reaches the acceptance standard and becomes a "rigid body", it is hoisted as a whole, which fundamentally controls the quality problems such as torsion and irregular tilt of the tower. The construction period is short, with an average construction period of about 50 days. In summary, the construction process of hoisting the equal-section guyed mast tower as a whole by a heavy-duty external climbing tower crane has obvious advantages over the traditional loose hoisting construction process in reducing safety risks, improving installation quality and improving installation efficiency. It is a feasible construction process that is easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the guyed mast tower structure of the present invention;

[0021] Figure 2 is a side view of the guyed mast tower of the present invention;

[0022] Figure 3 is a top view of the 1st to 4th layer standard draw cords of the present invention;

[0023] Figure 4 is a top view of the top draw cord of the fifth layer of the present invention;

[0024] Figure 5 It is a schematic diagram of the present invention using a heavy-duty external climbing tower crane to hoist a tower section assembly;

[0025] Figure 6 It is a schematic diagram of the top section structure of the present invention;

[0026] Figure 7 It is a schematic diagram of the tower head structure of the present invention;

[0027] Figure 8 It is a schematic diagram of the present invention when hoisting the tower head;

[0028] Fig. 9It is a side view of the heavy-duty external climbing tower machine of the present invention;

[0029] Fig.10 It is a front view of the heavy-duty external climbing tower machine of the present invention;

[0030] Fig.11 It is a structural schematic diagram of the climbing claw in the present invention;

[0031] Fig.12 It is the overall flow chart of the construction process;

[0032] Fig.13 It is the construction flow chart of automobile crane hoisting;

[0033] Fig.14 This is a physical picture of the heavy-duty external climbing tower crane being hoisted onto the tower section assembly;

[0034] Fig.15 This is a physical picture of the heavy-duty external climbing tower crane hoisting the remaining tower section components.

[0035] Among them are: 1. Tower section assembly; 11. Base; 12. Bottom section; 13. Standard section; 14. Rope section; 15. Top section; 16. Tower head; 2. Rope assembly; 21. Standard rope; 22. Top rope; 3. Heavy-duty external tower climbing machine; 31. Tower climbing machine outer cover; 32. Tower climbing machine inner cover; 33. Boom; 34. Bracket; 35. Climbing claw. DETAILED DESCRIPTION

[0036] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific preferred embodiments.

[0037] In the description of the present invention, it should be understood that the terms "left side", "right side", "upper part", "lower part" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. "First", "second" and the like do not indicate the importance of the components, and therefore cannot be understood as limiting the present invention. The specific dimensions used in this embodiment are only for illustrating the technical solution, and do not limit the scope of protection of the present invention.

[0038] The present invention Figure 1-15 As shown, a guyed mast tower and a hoisting construction process thereof are disclosed, wherein a hoisting construction process of the guyed mast tower comprises the following steps:

[0039] S1, completing the ground assembly of each tower section assembly 1;

[0040] S2. Hoist the base 11, the bottom section 12 and part of the standard section 13: hoist the base 11 to a suitable position using a truck crane, then hoist the bottom section 12 onto the base 11, and connect the base 11 and the bottom section 12 through flanges and bolts; then hoist part of the standard section 13 to the installation position on the bottom section 12 using a truck crane for connection and fixation;

[0041] S3, hoisting the heavy-duty external tower climbing machine 3: hoisting the heavy-duty external tower climbing machine 3 assembled on the ground to the installation position on the tower section assembly 1 by a truck crane, the outer sleeve 31 and the inner sleeve 32 of the tower climbing machine are engaged with the supporting plate of the tower section assembly 1 by the bracket 34, and are engaged with the main rod of the tower section assembly 1 by the climbing claw 35;

[0042] S4, self-climbing of the heavy-duty external tower climbing machine 3: After the tower section assembly 1 is hoisted to a certain height, the heavy-duty external tower climbing machine 3 needs to perform self-climbing; when the outer sleeve 31 of the tower climbing machine is lifted, the outer sleeve 31 of the tower climbing machine is connected to the motorized capstan on the ground, the connection between the bracket 34 and the climbing claw 35 of the outer sleeve 31 of the tower climbing machine and the tower section is removed, and the machine is lifted by the motorized capstan on the ground. After lifting to the upper tower section, the bracket 34 is engaged with the support plate, and is connected to the main pole of the tower section assembly 1 through the climbing claw 35; when the inner sleeve 32 of the tower climbing machine is lifted, the inner sleeve 32 of the tower climbing machine is connected to the motorized capstan on the ground, the connection between the bracket 34 and the climbing claw 35 of the inner sleeve 32 of the tower climbing machine and the tower section is removed, and the machine is lifted by the motorized capstan on the ground. After lifting to the upper tower section, the bracket 34 is engaged with the support plate, and is connected to the main pole of the tower section assembly 1 through the climbing claw 35;

[0043] S5. Hoisting the remaining tower sections and tower heads 16: The hook on the boom 33 of the heavy-duty external climbing tower crane 3 is connected to the tower section and tower head 16 to be installed, and the tower section and tower head 16 to be installed are hoisted to the installation position through the power system and spliced ​​with the installed tower sections.

[0044] A guyed mast tower, comprising a tower section assembly 1 and a guy rope assembly 2; the tower section assembly 1 comprises a base 11, a bottom section 12, a plurality of standard sections 13, a top section 15 and a tower head 16; the base 11, the bottom section 12, a plurality of standard sections 13, the top section 15 and the tower head 16 are arranged in sequence from bottom to top, the tops of the bottom section 12, the standard section 13 and the top section 15 are all provided with a guy rope section 14 connected to the guy rope assembly 2, the guy rope assembly 2 is arranged obliquely, one end of the guy rope assembly 2 is connected to the guy rope section 14, and the other end is connected to the ground; the guy rope assembly 2 comprises a standard guy rope 21 and a top guy rope 22; wherein, one end of the standard pull rope 21 is connected to the pull rope section 14 of the standard section 13 and the bottom section 12, and there are three standard pull ropes 21 connected to the pull rope section 14 of the standard section 13 and the bottom section 12, which are evenly arranged at a circumferential interval of 120°, and the elevation angle formed by the standard pull rope 21 and the tower section assembly 1 is 45°; the top pull rope 22 is connected to the pull rope section 14 of the top section 15, and there are 12 top pull ropes 22 connected to the pull rope section 14 of the top section 15, which are evenly arranged at a circumferential interval of 30°, and the elevation angle formed by the top pull rope 22 and the tower section assembly 1 is 43°.

[0045] Specifically, the height of the guyed mast tower of this project is 278.3m, which is a lattice guyed mast tower. The guyed mast tower is transported to the construction site in loose parts for installation. The cross section of the guyed mast tower is a regular triangle with a side width of 2.5m, and each section is 10m long. The guyed mast tower uses 5 layers of fiber ropes, and the 1st to 4th layers of fiber ropes are galvanized steel wire ropes with an elevation angle of about 45°. The top layer, i.e. the 5th layer, has 12 fiber ropes, which are evenly distributed at 30° to each other, and the elevation angle is about 43°.

[0046] It also includes a heavy-duty external tower climbing machine 3; the heavy-duty external tower climbing machine 3 includes a tower climbing machine outer shell 31, a tower climbing machine inner shell 32, a boom 33 and a power system; the tower climbing machine outer shell 31 is nested outside the tower climbing machine inner shell 32, the tower climbing machine outer shell 31 and the tower climbing machine inner shell 32 are both detachably connected to the tower section assembly 1, the boom 33 is connected to the top of the tower climbing machine inner shell 32, and the power system is connected to the hook on the boom 33 to provide lifting power for it. The tower climbing machine inner shell 32 and the tower climbing machine outer shell 31 are both provided with a bracket 34 and a climbing claw 35; the tower climbing machine inner shell 32 and the tower climbing machine outer shell 31 are engaged with the support plate through the bracket 34, and are engaged with the main rod of the tower section assembly 1 through the climbing claw 35.

[0047] The outer sleeve 31 of the tower climbing machine is connected to the supporting plate of the tower section through two brackets 34 to bear vertical force. The upper and lower climbing claws 35 are connected to the supporting rod of the tower section to ensure the stability of the outer sleeve 31 of the tower climbing machine. A pulley system is used between the inner and outer sleeves for self-lifting. The inner sleeve 32 of the tower climbing machine: It is connected to the supporting plate of the tower section through two brackets 34 to bear vertical force. The four-layer climbing claws 35 are connected to the main rod of the tower section to ensure the stability of the inner sleeve. The boom 33 is connected to the top of the inner sleeve through the bearing to hoist the tower section. The power system uses an ARS907 hydraulic traction machine as the hook lifting power, and cooperates with a 10-ton double-wheel pulley group and a φ20 lifting wire rope as the lifting system.

[0048] In order to reduce high-altitude operations and ensure the structural integrity of the external climbing tower crane, the overall ground assembly is adopted. The 110-ton crane is used for overall lifting and installation. According to the structural drawings, the inner sleeve 32 of the external climbing tower crane is assembled first, and the inner sleeve sections are connected with high-strength pins. Install from the top boom 33 end of the inner sleeve to the bottom in sequence, except for the bottommost support plate section; use a 25-ton crane to slightly lift the bottom of the inner sleeve, and install the outer sleeve from the bottom in sequence; finally install the bottommost support plate part of the inner sleeve, and assemble the bracket 34 and climbing claw 35 of the inner and outer sleeves according to the drawings and models. At this point, the ground assembly of the external climbing tower crane is completed. The outer sleeve 31 of the climbing tower crane can only slide longitudinally along the direction of the inner sleeve 32 of the climbing tower crane and cannot be penetrated.

[0049] The bottom section 12, standard section 13, rope section 14 and top section 15 of the tower section assembly 1 all include three main rods spliced ​​in sequence, and the cross section of the tower section assembly 1 is a regular triangle with a width of 2.5m. The base 11, bottom section 12, standard section 13, rope section 14 and top section 15 are all detachably connected through flanges. The heavy-duty external climbing tower machine 3 is attached to the mast cable tower section that has been hoisted through the inner sleeve 32 of the climbing tower machine and the outer sleeve 31 of the climbing tower machine. A supporting plate specially used to support the heavy-duty external climbing tower machine 3 is machined and welded on each tower section. Under the hoisting condition of the heavy-duty external climbing tower machine 3, the force is mainly applied by the inner sleeve 32 of the climbing tower machine. The bracket 34 of the inner sleeve 32 of the climbing tower machine is suspended on the supporting plate of the lower section of the mast tower, and the base clamp and the pull rod climbing claw 35 are installed to make it tightly connected with the cable mast tower, which plays a role in stable connection.

[0050] Before lifting, assemble the tower sections to be lifted, and tighten all the connecting bolts to meet the design requirements. Assemble the tower sections from scattered structural parts into a "rigid body". During the lifting process, the boom 33 of the heavy-duty external climbing tower crane 3 faces outward, and when the tower section is lifted to the installation height, stop lifting. At this time, the boom 33 is rotated 180° by a rotating device, preferably an electrically controlled rotation, to reach the installation position. Then slowly lower the tower section to be lifted to the end face of the tower section flange, connect the two contacting flange end faces with bolts and tighten them, and the lifting is completed.

[0051] Heavy-duty external climbing tower crane 3 self-climbing working conditions:

[0052] After the tower section is hoisted to a certain height, it enters the self-climbing working state. In this working state, it is mainly divided into the lifting of the outer cover 31 of the tower climbing machine and the lifting of the inner cover 32 of the tower climbing machine.

[0053] Heavy-duty external tower climbing machine 3 jacket lifting: When lifting the jacket, at this time, through the pulley group at the top of the inner jacket and the top of the jacket, a 5-ton motorized capstan is used as power on the ground to lift the jacket, so that the gravity of the jacket is transferred from the guyed mast tower to the ground motorized capstan. When the bracket 34 of the jacket 31 of the tower climbing machine is slightly separated from the support plate of the mast tower, the bracket 34 of the jacket 31 of the tower climbing machine can be pushed out from the support plate of the mast tower to completely separate them. And simultaneously remove the four climbing claws 35 connecting the jacket and the mast tower. Enter the jacket lifting state. When the jacket is lifted to the position where the bracket 34 and the support plate of the upper layer of the mast tower are in place, stop lifting, and hang the bracket 34 of the jacket 31 of the tower climbing machine into the support plate of the mast tower. Slowly loosen the motorized capstan, so that the gravity of the jacket 31 of the tower climbing machine is transferred from the ground motorized capstan to the support plate of the mast tower, and install the four climbing claws 35 of the jacket 31 of the tower climbing machine on the mast tower, and the jacket lifting is completed.

[0054] Lifting of the inner sleeve of the heavy-duty external tower climbing machine 3: When lifting the inner sleeve, the force is mainly applied by the bracket 34 of the outer sleeve 31 of the tower climbing machine. At this time, two 5-ton motorized capstans are used to synchronously lift the force through the pulleys on both sides of the bottom of the outer sleeve and the bottom of the inner sleeve; when the gravity of the inner sleeve is transferred from the mast tower to the ground motorized capstan, and the bracket 34 of the inner sleeve 32 of the tower climbing machine is slightly separated from the supporting plate of the mast tower, the bracket 34 of the inner sleeve 32 of the tower climbing machine can be pushed out from the supporting plate of the mast tower to completely separate them, and all the climbing claws 35 connecting the inner sleeve 32 of the tower climbing machine and the mast tower are removed simultaneously, and the inner sleeve 32 of the tower climbing machine is put into the lifting state. The lifting of the inner sleeve 32 of the tower climbing machine stops when it is lifted to the position of the bracket 34 and the supporting plate of the upper layer of the mast tower. The bracket 34 of the inner sleeve 32 of the tower climbing machine is hung into the supporting plate of the mast tower, and the two motorized winches are slowly loosened to transfer the gravity of the inner sleeve 32 of the tower climbing machine from the motorized winches on the ground to the supporting plate of the mast tower, and the two climbing claws 35 in the middle of the inner sleeve 32 of the tower climbing machine and the four climbing claws 35 at the bottom of the inner sleeve 32 of the tower climbing machine are all connected to the main pole of the mast tower. The lifting of the inner sleeve, i.e. the main holding pole, is completed and the hoisting condition is entered.

[0055] According to the on-site conditions and lifting requirements of the guyed mast tower, this project uses Zoomlion 25t and 110t truck cranes to assemble the guyed mast tower from 0 to 32 meters for hoisting, and hoists the heavy-duty external climbing tower crane 3 to the outside of the guyed mast tower as a whole; the truck crane boom 33 is mainly used for hoisting under the working radius of 6-12m. For example, Zoomlion ZTC250H562 (25T) truck crane. This truck crane is mainly used for the assembly and hoisting of guyed mast tower components and the lifting of objects with the 110T truck crane. The basic arm length is 10.9m, the lifting height is 11m, the main arm is up to 43m, and the lifting height is 43.1m. Hoisting is carried out under the working radius of 6-12m, the maximum lifting weight of the main arm is 25 tons, and the minimum is 7.5 tons, which meets the hoisting requirements on site. Zoomlion ZTC1000A763 (110T), this truck crane is mainly used for the lifting of mast tower components and special external climbing tower cranes, with a basic arm length of 13.7m, a lifting height of 13.7m, a main arm of up to 75m, a lifting height of 75.6m, a main arm + jib total length of 86.4m, and a lifting height of 86.7m. Lifting is carried out under the working radius of 6-12m, with a configuration of 40 tons, a maximum lifting weight of 110 tons for the main arm, a minimum of 6.8 tons, and a maximum lifting weight of 4.0 tons for the jib, which meets the lifting needs on site.

[0056] Before hoisting, the mast tower is assembled from bottom to top according to the assembly sequence of the mast tower. The bolts are tightened in place at one time, and the horizontality and verticality are fully inspected and accepted to meet the conditions for segmented hoisting.

[0057] The 0-42m tower section is hoisted by a 110-ton crane and the whole section is hoisted. Temporary guy wires need to be installed in three directions for each section, and the tension value is not less than 10 tons. The verticality is adjusted with a theodolite to ensure the stability of the mast tower.

[0058] Installation of heavy-duty external climbing tower machine 3: Use 110T truck crane as the main crane, the specific lifting point is at the top of the inner sleeve at the boom 33, four-point lifting, 25T truck crane as auxiliary tail, the specific main hook is installed at 12 meters of the inner sleeve, and the auxiliary hook is installed at 20 meters of the tail end of the inner sleeve. First lift the 110T crane main hook, and then lift the 25-ton hook. Loosen the 25T hook while ensuring that the tail of the heavy-duty external climbing tower machine 3 does not rub against the ground. Rotate it from a horizontal state to a vertical state. Use a 110-ton crane to hoist the heavy-duty external climbing tower machine 3 as a whole to the positioning height, move the hook horizontally so that the bracket 34 of the inner sleeve 32 of the external climbing tower machine is hung on the supporting plate of the tower body of the guying mast, and connect the climbing claws 35 of the inner sleeve 32 and the outer sleeve 31 of the climbing tower machine in turn.

[0059] 42-275.5m tower section hoisting: After the inner sleeve 32 of the external climbing tower crane is lifted into place, check whether the installation position of the inner sleeve support plate is secure and whether the inner sleeve climbing claw 35 is firmly connected to the main rod of the installed guy mast tower section. At this time, the tower section hoisting conditions are met. Use three φ20 steel wire sleeves of equal length to connect the three main pipes of the tower section respectively, and the reserved length of the top of the steel wire sleeve should be less than 2 meters, otherwise the hook stroke will be insufficient and the tower section cannot be put in place. Use the hook of the external climbing tower crane to lift the top of the tower section, and the 25t crane will slip. First lift the hook of the external climbing tower crane, and then lift the 25-ton hook. Loosen the 25T hook while ensuring that the tail of the tower section does not rub against the ground. Make it rotate from a horizontal state to a vertical state. When hoisting each section, hang the lifting rigging on the ground, and after checking that it is correct, hang the tool bag with connecting bolts at the bottom of the tower section, and tie the control rope of the section. When the mast tower is hoisted, the communication between the tower and the tower should be smooth and close. When the hoisted object is 0.5 meters above the ground, a command is issued to stop the machine to check the connection safety of each part of the hoisted object, remove the debris on the hoisted object, and then hoist and install it. After the tower section is rotated to the vertical state, the tower section is lifted at a uniform speed by the traction machine. During the hoisting process, the distance between the hoisted tower section and the hoisted tower body is observed, and the minimum safety distance of 2 meters is adjusted by the control rope. After the tower section is hoisted to the in-place height, the hoisted tower section is moved horizontally to the top of the mast tower by controlling the rotation of the boom 33 of the external climbing tower crane. After the flange end face is aligned, the hoisted tower section is slowly lowered and the flange end face is connected. The hoisting of the tower section is completed. After the tower section is hoisted in place, temporary guy wires are installed on three sides of the main pipe. Considering that the tension of the temporary guy wire is controlled between 10 tons and 12 tons. Temporary guy wires use φ28 and φ32 steel wire ropes. Due to the structural characteristics of the guyed mast tower: there is a formal guy wire at 59.5m, 119.5m, 179.5m, 229.5m and 274.5m respectively. According to its characteristics, there is a formal guy wire every 5-6 tower sections. The construction considers the use of four layers of temporary guy wires, one layer every 10 meters, which is raised synchronously with the tower hoisting height.

[0060] Hoisting of top section 15 and tower head 16: When the guyed mast tower was hoisted to 272.5 meters, only the 5-meter-high top section and the tower head 16 with a two-layer circular structure of 2.5 meters remained on the top. The total height of the two parts did not exceed 10 meters, but the weight exceeded 10 tons. To ensure construction safety, two hoisting operations were used. The first hoisting: the top section and the lower layer of the tower head section. After being assembled into a whole on the ground, they were hoisted at one time. The hoisting height of this time was 5.38 meters and the hoisting weight was 7.3 tons. The second hoisting: the upper layer of the tower head section and the top guardrail and lightning conductor. The hoisting height of this time was 1.52 meters and the hoisting weight was 2.9 tons. The heavy-duty external climbing tower crane 3 was lifted to a height of 284.5 meters, and the inner support plate was placed on the 26th section of the guyed mast tower, that is, 260.5 meters. Use three φ20 steel wire sleeves of equal length to connect the three main pipes of the tower section and pass through the lower disc of the tower head section. Note that when the steel wire sleeve passes through the lower disc of the tower head section, the steel wire rope should be placed to form a cut under lateral force. Use the hook of the external climbing tower crane for lifting, and the 25t crane slides off the tail. First lift the hook of the external climbing tower crane, and then lift the 25-ton hook. Loosen the 25T hook while ensuring that the tail of the tower section does not rub against the ground. Rotate it from a horizontal state to a vertical state. After the top section 15 is slowly lifted 0.5 meters above the ground, stop and check the connection safety of the hoisting device, connect the control rope, and then slowly lift it. Stop when the top section 15 is lifted to a height of about 100mm above the tower top. Control the boom 33 to rotate above the position. Slowly loosen the lifting rope and install the top section 15 in place. After the top section 15 is installed, there is no need to lift the external climbing tower crane. The same construction process can be used to hoist the upper layer of the tower head 16.

[0061] Disassembly of heavy-duty external climbing tower crane 3: After the heavy-duty external climbing tower crane 3 is hoisted with the guyed mast tower and the top antenna, it is disassembled according to the following procedures: The heavy-duty external climbing tower crane 3 climbs down twice for a total of 20 meters, so that the head of the tower crane is located below the tower head 16 of the guyed mast tower. Two 10-ton double-wheel pulleys are set at the top of the mast tower, and a φ15 steel wire rope is put on to two 5-ton motorized winches on the ground. The top of the steel wire rope is locked to the head of the tower crane respectively, and a control rope is set at the tower crane body, and it is slowly lowered through the winch. When the base of the tower crane is about to reach the ground, a 25-ton crane is used to assist in tail sliding, and the tower crane is lowered to the ground and disassembled.

[0062] Heavy-duty external climbing tower crane 3-section hoisting: rated hoisting weight 10 tons, ground assembly of the whole tower, bolt tightening, horizontality, verticality ground inspection and acceptance. Reduce the workload of high-altitude operations, greatly reduce safety risks, and reduce the difficulty and risk points of quality control. After the whole section of the tower reaches the acceptance standard and becomes a "rigid body", it is hoisted as a whole, fundamentally controlling the quality problems of tower torsion, irregular tilt, etc. The construction period is short, with an average construction period of about 50 days.

[0063] In summary, the construction technology of using a heavy-duty external climbing tower crane to hoist an equal-section guyed mast tower in three sections has obvious advantages over the traditional loose hoisting construction technology in reducing safety risks, improving installation quality and improving installation efficiency. It is a feasible construction technology that is easy to promote.

[0064] The preferred embodiments of the present invention are described in detail above; however, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and these equivalent transformations all belong to the protection scope of the present invention.

Claims

1. A hoisting construction process for a guyed mast tower, characterized in that: The following steps are involved: S1, completing the ground assembly of each tower section assembly (1); S2. Hoisting the base (11), the bottom section (12) and part of the standard section (13): hoisting the base (11) to a suitable position using a truck crane, then hoisting the bottom section (12) onto the base (11), and connecting the base (11) and the bottom section (12) via flanges and bolts; then hoisting part of the standard section (13) to the installation position on the bottom section (12) using a truck crane for connection and fixing; S3, hoisting the heavy-duty external tower climbing machine (3): hoisting the heavy-duty external tower climbing machine (3) assembled on the ground to the installation position on the tower section assembly (1) by means of a truck crane, the outer sleeve (31) and the inner sleeve (32) of the tower climbing machine are engaged with the support plate of the tower section assembly (1) by means of a bracket (34), and are engaged with the main rod of the tower section assembly (1) by means of a climbing claw (35); S4. Self-climbing of the heavy-duty external tower climbing machine (3): After the tower section assembly (1) is hoisted to a certain height, the heavy-duty external tower climbing machine (3) needs to be self-climbed; when the outer shell (31) of the tower climbing machine is lifted, the outer shell (31) of the tower climbing machine is connected to the motorized winch on the ground, the connection between the bracket (34) and the climbing claw (35) of the outer shell (31) of the tower climbing machine and the tower section assembly (1) is removed, and the machine is lifted by the motorized winch on the ground. After the machine is lifted to the upper tower section assembly (1), the bracket (34) is engaged with the support plate. , and is clamped on the main pole of the tower section assembly (1) through the climbing claw (35); when the tower climbing machine inner sleeve (32) is lifted, the tower climbing machine inner sleeve (32) is connected to the motorized capstan on the ground, the bracket (34) of the tower climbing machine inner sleeve (32) and the connection between the climbing claw (35) and the tower section assembly (1) are removed, and the tower section assembly (1) is lifted through the motorized capstan on the ground. After the tower section assembly (1) is lifted to the upper layer, the bracket (34) is clamped on the supporting plate, and is clamped on the main pole of the tower section assembly (1) through the climbing claw (35); S5. Hoisting the remaining tower sections and tower heads (16): The hook on the boom (33) of the heavy-duty external climbing tower crane (3) is connected to the tower section assembly (1) and the tower head (16) to be installed, and the tower section assembly (1) and the tower head (16) to be installed are driven by the power system to be hoisted to the installation position and spliced ​​with the installed tower section assembly (1).

2. A guyed mast tower hoisted using the construction process described in claim 1, characterized in that: It comprises a tower section assembly (1) and a pull rope assembly (2); The tower section assembly (1) comprises a base (11), a bottom section (12), a plurality of standard sections (13), a top section (15) and a tower head (16); the base (11), the bottom section (12), a plurality of standard sections (13), the top section (15) and the tower head (16) are arranged in sequence from bottom to top, and the tops of the bottom section (12), the standard sections (13) and the top section (15) are each provided with a rope section (14) connected to a rope section (2); the rope section (2) is arranged obliquely, and one end of the rope section (2) is connected to the rope section (14), and the other end is connected to the ground; the rope section (2) comprises a standard rope (21) and a top rope (22); wherein, One end of the standard pull rope (21) is connected to the pull rope section (14) of the standard section (13) and the bottom section (12), and there are three standard pull ropes (21) connected to the pull rope section (14) of the standard section (13) and the bottom section (12), which are evenly arranged at a circumferential interval of 120°, and the elevation angle formed by the standard pull rope (21) and the tower section assembly (1) is 45°; the top pull rope (22) is connected to the pull rope section (14) of the top section (15), and there are 12 top pull ropes (22) connected to the pull rope section (14) of the top section (15), which are evenly arranged at a circumferential interval of 30°, and the elevation angle formed by the top pull rope (22) and the tower section assembly (1) is 43°.

3. A guyed mast tower according to claim 2, characterized in that: The base (11), the bottom section (12), the standard section (13), the pull rope section (14) and the top section (15) are all detachably connected via a flange.

4. A guyed mast tower according to claim 3, characterized in that: Support plates are welded to the bottom section (12), the standard section (13) and the top section (15).

5. A guyed mast tower according to claim 4, characterized in that: It also comprises a heavy-duty external tower climbing machine (3); the heavy-duty external tower climbing machine (3) comprises a tower climbing machine outer casing (31), a tower climbing machine inner casing (32), a boom (33) and a power system; the tower climbing machine outer casing (31) is nested outside the tower climbing machine inner casing (32); the tower climbing machine outer casing (31) and the tower climbing machine inner casing (32) are both detachably connected to a tower section assembly (1); the boom (33) is connected to the top of the tower climbing machine inner casing (32); and the power system is connected to a hook on the boom (33) to provide lifting power therefor.

6. A guyed mast tower according to claim 5, characterized in that: The bottom section (12), the standard section (13) and the top section (15) of the tower section assembly (1) all include three main rods spliced ​​in sequence, and the cross section of the tower section assembly (1) is an equilateral triangle with a width of 2.5 m.

7. A guyed mast tower according to claim 6, characterized in that: The inner sleeve (32) and the outer sleeve (31) of the tower climbing machine are both provided with a bracket (34) and a climbing claw (35); the inner sleeve (32) and the outer sleeve (31) of the tower climbing machine are clamped on the supporting plate through the bracket (34), and are clamped on the main rod of the tower section assembly (1) through the climbing claw (35).

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