Assembly platform for precast concrete tower transition section

Abstract

The invention discloses an assembly platform for a transition section of a precast concrete tower, comprising a plurality of assembly platform bodies uniformly arranged along the circumferential direction of a transition section barrel segment (6), so that the transition section barrel segment is placed on the plurality of assembly platform bodies, each assembly platform body comprising a support platform (1), a positioning member (2), an axial pressing member (3) and a radial pressing member (4); the support platform is mounted on the floor through the positioning member, and the support platform is arranged along the radial direction of the transition section barrel segment; a groove (11) and a reaction boss (12) are provided on the support platform, the axial pressing member is embedded in the groove and is arranged and retracted along the height direction of the tower, the radial pressing member is arranged on the reaction boss and is arranged and retracted along the radial direction of the tower, and when the transition section barrel segment is placed on the support platform, the axial pressing member presses against the bottom of the barrel segment, and the radial pressing member presses against the outer wall of the barrel segment. The invention can adjust the radial position and height of the barrel segment of the transition section barrel segment, thereby realizing rapid and accurate assembly of the barrel segment.

Description

Technical Field

[0001] The invention relates to construction equipment for a concrete wind power tower, and in particular to an assembly platform for a prefabricated concrete tower transition section. Background Art

[0002] As a clean energy technology, wind power generation has been widely used in the "Three Norths" region of my country with good wind resources. As the development of the "Three Norths" region becomes increasingly saturated, wind power generation is developing inland. Due to the lower wind speed in inland areas and the increasing power of wind turbines, the diameter of the wind rotor is getting larger and the tower height is getting higher. At present, the tower height of domestic onshore wind turbines has reached 120-160m.

[0003] As the tower increases in height, the rigidity of traditional steel towers is low, and the towers are prone to resonance and damage. The steel-concrete hybrid tower structure with a concrete tower at the bottom and a steel tower at the top has been widely used, which can effectively improve the rigidity of the tower and ensure that the tower avoids resonance. Concrete towers are generally prefabricated in sections and pieces, and assembled and hoisted after being transported to the site. That is, the tower is divided into several sections along the height direction, and after being prefabricated in the factory, it is transported to the site and assembled on a special assembly platform. After the assembly is completed, the entire section is hoisted.

[0004] The transition section of the precast concrete tower tube not only serves as the anchorage end of the prestressed tendons of the lower concrete tower tube, but also serves as the anchorage end of the prestressed anchor bolts of the upper steel tower tube. Its stress is extremely complex. The existing technology is to prefabricate the entire tube section in the factory and then transport it to the site. Due to the problems of overweight and overwidth of the entire tube section, transportation is extremely difficult. Therefore, a temporary processing plant must be built near the wind farm for prefabrication, which is difficult and costly.

[0005] The existing technology also uses the method of prefabricating pieces to solve the problem of transportation difficulties. However, due to the error in the assembly accuracy of the prefabricated concrete cylinder pieces, the flatness requirement when connecting the top of the transition section with the bottom flange of the upper steel tower is very high, and the error is required to be controlled within 1mm. This is very difficult for concrete components with a diameter of 4-5m, thus affecting the structural safety of the entire tower. Summary of the invention

[0006] The object of the present invention is to provide an assembly platform for a transition section of a precast concrete tower tube, which can adjust the radial position and height of the tube segments of the transition section tube segment, thereby realizing rapid and accurate assembly of the tube segments.

[0007] The present invention is achieved in that:

[0008] An assembly platform for a transition section of a precast concrete tower comprises a plurality of assembly platform bodies uniformly arranged along the circumferential direction of the transition section barrel section, so that the bottom of the transition section barrel section can be placed on the plurality of assembly platform bodies, and each assembly platform body comprises a support platform, a positioning member, an axial tightening member and a radial tightening member; the support platform is fixedly mounted on the floor of an assembly area by means of a plurality of positioning members, so that the plurality of support platforms are located on the same plane, and the length direction of the support platform is arranged along the radial direction of the transition section barrel section; a groove and a reaction boss are arranged on the top surface of the support platform, the axial tightening member is embedded in the groove, and the axial tightening member is arranged and retracted along the height direction of the tower barrel, the radial tightening member is arranged on the reaction boss, and the radial tightening member is arranged and retracted along the radial direction of the tower barrel, so that when the transition section barrel section is placed on the support platform, the axial tightening member can be tightened against the bottom of the barrel sheet of the transition section barrel section, and the radial tightening member can be tightened against the outer wall of the barrel sheet of the transition section barrel section.

[0009] A support plate is provided in the gap between the bottom surface of the cylinder sheet of the transition section cylinder segment and the top surface of the support platform, and the thickness of the support plate is equivalent to the height of the gap.

[0010] The supporting plate is located at one side of the groove.

[0011] At least two assembling platform bodies are arranged at intervals at the bottom of the cylinder sheet of each transition section cylinder segment, and the joint of the cylinder segment is located between two adjacent supporting platforms.

[0012] The spacing between the reaction bosses of the two assembly platform bodies arranged opposite to each other along the radial direction of the transition section cylinder segment is greater than the bottom outer diameter of the transition section cylinder segment, and the spacing between the grooves of the two assembly platform bodies is equivalent to the bottom outer diameter of the transition section cylinder segment.

[0013] When the axial pressing member rises to the maximum stroke, the top surface of the axial pressing member is higher than the top surface of the supporting platform by no less than 2 cm.

[0014] The radial horizontal telescopic distance of the radial pressing member along the transition section cylinder segment is 2-5 cm.

[0015] The fixing member includes a first fixing bolt, a second fixing bolt and a fixing angle steel. The vertical section of the fixing angle steel is fixedly installed on the two side walls of the support platform by the first fixing bolt, and the horizontal section of the fixing angle steel is fixedly installed on the floor by the second fixing bolt.

[0016] The support platform has a length of 1-2m, a width of 40-80cm, and a height of 40-60cm.

[0017] The plane size of the groove is 20cm*20cm, and the depth is 10cm; the height of the reaction boss is 10-20cm, the width is 20cm, and the length is equivalent to the width of the supporting platform.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention is provided with radial tightening members, which can provide reverse tightening along the radial direction of the cylinder segment and adjust the joint width of the cylinder segment. The axial tightening members are provided, which can tighten along the height direction of the cylinder segment and adjust the horizontality of the top surface of the cylinder segment, thereby ensuring high assembly accuracy of the cylinder segment and meeting the design requirements, thereby ensuring the hoisting accuracy and reliability of the transition section and the lower concrete tower structure and the upper steel tower structure.

[0020] 2. The present invention is provided with a support plate, which can transfer the deadweight of the cylinder segment to the support platform, avoiding the failure of the axial fastening member due to creep under long-term load, so as to meet the needs of cylinder segment joint construction and maintenance, thereby ensuring the effectiveness and reliability of the assembly of the transition section cylinder segment.

[0021] 3. The present invention is provided with a plurality of assembling platform bodies evenly distributed along the circumferential direction of the transition section cylinder segment, which can provide effective support for the transition section cylinder segment and ensure the stability of the cylinder segment during the assembly process.

[0022] 4. The present invention has a simple structure, is easy to manufacture and use, and is particularly suitable for assembling cylinder segments with high requirements on flatness, such as concrete transition sections and cylinder sections.

[0023] The present invention adjusts the joint width of the cylinder segments through radial tightening members and adjusts the height of the cylinder segments through axial tightening members, so as to realize fast and accurate assembly of the cylinder segments and meet the precision requirements of the top flatness of the transition section cylinder segments, thereby ensuring the hoisting accuracy of the steel-concrete wind power tower and improving the construction quality and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the arrangement of an assembly platform for a transition section of a precast concrete tower according to the present invention;

[0025] Figure 2 It is a stereoscopic diagram of an assembly platform body in an assembly platform for a transition section of a precast concrete tower tube according to the present invention;

[0026] Figure 3 It is a usage status diagram of the assembling platform of the present invention for the transition section of the precast concrete tower.

[0027] In the figure, 1 is a supporting platform, 11 is a groove, 12 is a reaction boss, 2 is a fixing member, 21 is a first fixing bolt, 22 is a second fixing bolt, 23 is a fixing angle steel, 3 is an axial tightening member, 4 is a radial tightening member, 5 is a supporting plate, and 6 is a transition section cylinder segment. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0029] Please see attached Figure 1 To Attachment Figure 3 , an assembly platform for a transition section of a prefabricated concrete tower, comprising a plurality of assembly platform bodies uniformly arranged along the transition section barrel section 6, so that the bottom of the transition section barrel section 6 can be placed on the plurality of assembly platform bodies, each assembly platform body comprising a support platform 1, a positioning member 2, an axial tightening member 3 and a radial tightening member 4; the support platform 1 is fixedly installed on the floor of the assembly area through a plurality of positioning members 2, so that the plurality of support platforms 1 are located on the same plane, and the length direction of the support platform 1 is along the transition section barrel section 6. The radial setting of the transition section barrel segment 6; a groove 11 and a reaction boss 12 are provided on the top surface of the supporting platform 1, the axial tightening member 3 is embedded in the groove 11, and the axial tightening member 3 is set and retracted along the height direction of the tower, the radial tightening member 4 is set on the reaction boss 12, and the radial tightening member 4 is set and retracted along the radial direction of the tower, so that when the transition section barrel segment 6 is placed on the supporting platform 1, the axial tightening member 3 can be tightened on the bottom of the barrel segment of the transition section barrel segment 6, and the radial tightening member 4 can be tightened on the outer wall of the barrel segment of the transition section barrel segment 6.

[0030] A support plate 5 is provided in the gap between the bottom surface of the barrel piece of the transition section barrel segment 6 and the top surface of the support platform 1, and the thickness of the support plate 5 is equivalent to the gap height. Since the gap between the bottom surface of the barrel piece of the transition section barrel segment 6 and the top surface of the support platform 1 on each assembled platform body may be different, the thickness of the inserted support plate 5 is also different. The support plate 5 can be used to support the barrel piece of the transition section barrel segment 6 to ensure the flatness of the top of the barrel segment.

[0031] The support plate 5 is located on one side of the groove 11 to avoid interference with the axial pressing member 3. The deadweight of the cylinder can be directly transferred to the supporting platform 1 through the support plate 5, which can prevent the axial pressing member 3 from creeping and deforming under long-term load.

[0032] When the axial jacking member 3 rises to the maximum stroke, the top surface of the axial jacking member 3 is not less than 2 cm higher than the top surface of the support platform 1, ensuring that it can effectively adjust and support the bottom of the cylinder segment of the transition section cylinder segment 6. Preferably, the axial jacking member 3 can adopt a short-type separation jack of the prior art so that it can meet the lifting stroke requirements in the height direction.

[0033] The radial tensioning member 4 has a horizontal telescopic distance of 2-5 cm along the radial direction of the transition section cylinder segment 6, ensuring that effective radial thrust is provided to the cylinder sheet of the transition section cylinder segment 6. Preferably, the radial tensioning member 4 can adopt a long separate jack of the prior art, so that it can meet the radial telescopic travel requirement.

[0034] At least two assembly platform bodies are arranged at intervals at the bottom of each transition section cylinder segment 6, and the joint of the cylinder segment is located between two adjacent support platforms 1, ensuring stable support of each cylinder segment by the assembly platform body through at least two contact surfaces.

[0035] The spacing between the reaction bosses 12 of the two assembly platform bodies arranged opposite to each other along the radial direction of the transition section barrel segment 6 is greater than the bottom outer diameter of the transition section barrel segment 6, and the spacing between the grooves 11 of the two assembly platform bodies is equivalent to the bottom outer diameter of the transition section barrel segment 6, ensuring that the transition section barrel segment 6 can be placed between several assembly platform bodies, and the height of the transition section barrel segment 6 can be adjusted by the axial tightening piece 3 in the groove 11 after the barrel segment joint is adjusted into place.

[0036] The fixing member 2 includes a first fixing bolt 21, a second fixing bolt 22 and a fixing angle steel 23. The vertical section of the fixing angle steel 23 is fixedly mounted on the two side walls of the support platform 1 by the first fixing bolt 21, and the horizontal section of the fixing angle steel 23 is fixedly mounted on the floor by the second fixing bolt 22, which can ensure the stability of the assembly platform body, thereby ensuring the stability of the cylinder sheet and the accuracy of adjustment during the assembly process. The second fixing bolt 22 can be an expansion bolt to improve the convenience of connecting the fixing member 2 with the floor. The number of fixing members 2 is determined according to the size of the support platform 1.

[0037] The size of the support platform 1 can be determined according to the size of the cylinder sheet of the transition section cylinder segment 6. Preferably, the length of the support platform 1 is 1-3m, the width is 40-80cm, and the height is 40-60cm.

[0038] The size of the groove 11 is determined according to the size of the axial pressing member 3. Preferably, the plane size of the groove 11 is about 20 cm*20 cm, and the depth is about 10 cm.

[0039] The size of the reaction boss 12 is determined according to the size of the radial tightening member 4 . Preferably, the reaction boss 12 has a height of 10-20 cm, a width of about 20 cm, and a length equivalent to the width of the support platform 1 .

[0040] Embodiment 1:

[0041] The transition section barrel segment 6 is composed of two barrel segments, and two assembly platform bodies are arranged at the bottom of each barrel segment, and the four assembly platform bodies are arranged symmetrically about the center of the transition section barrel segment 6. Both sides of the assembly platform body are fixedly installed on the floor of the assembly area through two fixing members 2, and the spacing between the reaction bosses 12 of the two assembly platform bodies arranged opposite to each other is greater than the bottom outer diameter of the transition section barrel segment 6.

[0042] The support platform 1 is 2m long, 60cm wide and 40cm high, and is cast by concrete. The plane size of the groove 11 is 20cm*20cm, and the depth is 10cm; the height of the reaction boss 12 is 20cm, the width is 20cm and the length is 60cm.

[0043] During assembly, the two cylinder segments of the transition section cylinder segment 6 are hoisted on the support platform 1 of the four assembly platform bodies. The joints of the cylinder segments should be located in the middle of the adjacent support platforms 1 to ensure that there are two assembly platform bodies under each cylinder segment. The seam width of the cylinder segment is 2-5cm larger than the designed seam width, that is, the initial position of the cylinder segment is located outside the assembly completion position. The radial position of the cylinder segment is adjusted by lifting the radial tightening member 4 so that the seam width gradually decreases to the designed seam width. Then the axial tightening member 3 is used to adjust the height of each cylinder segment; when adjusting the height of the cylinder segment, a level can be set up on the top of the transition section cylinder segment 6 to measure the elevations of at least 8 points on the top of the cylinder segment 6 to determine the flatness of the top of the cylinder segment 6 until the height difference of the 8 measuring points of the two cylinder segments meets the design requirements. Since the cylinder segments may need to be connected into an integral cylinder segment through grouting or other methods, the entire construction and maintenance time is relatively long. In order to prevent the axial tensioning member 3 from creeping and deforming under long-term load, a support plate 5 made of steel plate is driven into the bottom of the cylinder segment, so that the deadweight of the cylinder segment is directly transferred to the support platform 1 through the support plate 5, ensuring the flatness of the top of the transition section cylinder segment 6. At the same time, since the gaps between the bottom surfaces of each cylinder segment and the top surface of the support platform 1 are not equal, the thickness of the support plate 5 driven into the bottom of the cylinder segment is also adjusted accordingly. Finally, the vertical seams of the cylinder segments are connected according to the design requirements to complete the assembly of the cylinder segments. After the construction and maintenance are completed, the subsequent hoisting operations can be carried out.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An assembly platform for a prefabricated concrete tower transition section, characterized by: The invention comprises a plurality of assembly platform bodies which are evenly arranged along the circumferential direction of the transition section barrel section (6), so that the bottom of the transition section barrel section (6) can be placed on the plurality of assembly platform bodies, and each assembly platform body comprises a support platform (1), a positioning member (2), an axial tightening member (3) and a radial tightening member (4); the support platform (1) is fixedly mounted on the floor of the assembly area through the plurality of positioning members (2), so that the plurality of support platforms (1) are located on the same plane, and the length direction of the support platform (1) is arranged along the radial direction of the transition section barrel section (6); the support platform A groove (11) and a reaction boss (12) are provided on the top surface of the tower (1), an axial pressing member (3) is embedded in the groove (11), and the axial pressing member (3) is arranged and retracted along the height direction of the tower, and a radial pressing member (4) is arranged on the reaction boss (12), and the radial pressing member (4) is arranged and retracted along the radial direction of the tower, so that when the transition section cylinder segment (6) is placed on the support platform (1), the axial pressing member (3) can be pressed against the bottom of the cylinder segment of the transition section cylinder segment (6), and the radial pressing member (4) can be pressed against the outer wall of the cylinder segment of the transition section cylinder segment (6); There is a gap between the bottom surface of the cylinder sheet of the transition section cylinder segment (6) and the top surface of the support platform (1); At least two assembly platform bodies are arranged at intervals at the bottom of the cylinder piece of each transition section cylinder segment (6), and the joint of the cylinder segment is located between two adjacent support platforms (1).

2. The assembly platform for the transition section of a prefabricated concrete tower according to claim 1 is characterized in that: A support plate (5) is provided in the gap between the bottom surface of the cylinder sheet of the transition section cylinder segment (6) and the top surface of the support platform (1), and the thickness of the support plate (5) is equivalent to the height of the gap.

3. The assembly platform for the transition section of a precast concrete tower according to claim 2 is characterized in that: The support plate (5) is located on one side of the groove (11).

4. The assembly platform for the precast concrete tower transition section according to claim 1 is characterized in that: The spacing between the reaction bosses (12) of the two assembly platform bodies arranged opposite to each other along the radial direction of the transition section barrel section (6) is greater than the bottom outer diameter of the transition section barrel section (6), and the spacing between the grooves (11) of the two assembly platform bodies is equivalent to the bottom outer diameter of the transition section barrel section (6).

5. The assembly platform for the precast concrete tower transition section according to claim 1 is characterized in that: When the axial tightening member (3) rises to the maximum stroke, the top surface of the axial tightening member (3) is not less than 2 cm higher than the top surface of the supporting platform (1).

6. The assembly platform for the transition section of a precast concrete tower according to claim 1 is characterized in that: The radial tightening member (4) has a horizontal telescopic distance of 2-5 cm along the radial direction of the transition section cylinder (6).

7. The assembly platform for the transition section of a prefabricated concrete tower according to claim 1 is characterized in that: The positioning member (2) comprises a first fixing bolt (21), a second fixing bolt (22) and a fixing angle steel (23), wherein the vertical section of the fixing angle steel (23) is fixedly mounted on the two side walls of the support platform (1) via the first fixing bolt (21), and the horizontal section of the fixing angle steel (23) is fixedly mounted on the floor via the second fixing bolt (22).

8. The assembly platform for prefabricated concrete tower transition section according to any one of claims 1, 2, 5 or 7, characterized in that: The support platform (1) has a length of 1-2 m, a width of 40-80 cm, and a height of 40-60 cm.

9. The assembly platform for prefabricated concrete tower transition section according to claim 1 is characterized by: The planar dimensions of the groove (11) are 20 cm*20 cm, and the depth is 10 cm; the height of the reaction boss (12) is 10-20 cm, the width is 20 cm, and the length is equivalent to the width of the support platform (1).

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