Wind power concrete tower drum duct piece assembling construction method

Abstract

The invention relates to the technical field of steel mixing tower drum construction, in particular to a wind power concrete tower drum duct piece assembling construction method which comprises the following steps of material preparation, machine tool preparation, duct piece quality inspection, assembling platform pressing, site preparation, assembling platform leveling, vertical joint reinforcing steel bar installation, torque application and closed hole plate installation. Installing a grouting pipe and grouting, installing an interior trim part and polishing, inspecting the strength of the duct piece and taking the duct piece out of an assembling table, and finally inspecting and shipping. According to the embodiment of the invention, efficient assembly of the duct pieces is effectively realized, the operation process is clear and definite, the operation safety is high, and the construction efficiency and the construction quality are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of steel hybrid tower construction, and in particular to a wind power concrete tower segment assembly construction method. Background Art

[0002] With the country's advancement in the renewable energy sector, hybrid towers, particularly those combining concrete and steel, have steadily gained market share and become increasingly dominant in the ultra-high tower wind power market. The tower base is a concrete structure prefabricated in segments. Each segment consists of two C-shaped or multiple curved segments, connected by vertical joints and grouted with steel bars to form a complete O-shaped segment. The assembled O-shaped segments are then bonded top and bottom with mortar or structural adhesive, and finally tensioned together using prestressed steel strands in pre-reserved holes within the segments.

[0003] Currently, the height of a typical steel-concrete tower is generally between 160 and 180 meters, with the lower precast concrete tower tube ranging from 140 to 160 meters in height. From bottom to top, the tube segments are arranged in order: M00, M01, M02, M03, and so on. The tower tube diameter decreases in a stepped pattern, from 9 meters to 4.8 meters in multiple stages. Each tube segment is approximately 4 meters high and 300 mm thick. The lower tower tube has an outer diameter of 9 meters and is composed of two C-shaped segments, connected by vertical joints with dowels and grouting to form a complete O-shaped segment. Complete precast O-shaped segments are used for diameters below 5.4 meters.

[0004] How to achieve efficient assembly of pipe segments is a key research topic in this field. Summary of the Invention

[0005] In order to achieve efficient assembly of pipe segments, the present invention provides a wind power concrete tower pipe segment assembly construction method.

[0006] The wind power concrete tower tube segment assembly construction method provided by the present invention adopts the following technical solutions: A wind turbine concrete tower segment assembly construction method includes the following: material preparation, machine preparation, segment quality inspection, assembly platform pressing, site preparation, assembly platform leveling, installation of vertical joint steel bars, application of torque and installation of closed-hole plates, installation of grouting pipes and grouting, installation of interior trim and polishing, segment strength inspection and lowering from the assembly platform, and final inspection and shipment.

[0007] By adopting the above technical solution, the embodiment of the present invention effectively realizes the efficient assembly of pipe segments, the operation process is clear and definite, the operation is highly safe, and it is conducive to improving construction efficiency and construction quality.

[0008] Optional, prepare materials, including: epoxy resin glue, grouting material, threaded steel bars, closed-cell panels. The epoxy resin glue and grouting material should be neatly stacked, with wooden blocks underneath and rain and sun protection measures on top.

[0009] Optional equipment preparation includes crawler crane, lifting belt, universal lifting ring, clamping ring, sealing strip, fastening belt, grouting pump, weighing scale, and agitator.

[0010] Optional segment quality inspection includes: timely inspection of whether there are quality defects after the segments arrive at the site, timely discovery and treatment to avoid affecting the lifting. The protection status, number, size, integrity, number and location of the finished segment products are key inspection items.

[0011] Optional, assembly platform pressing, specifically including: before the assembly platform is used for the first time, it needs to be pre-pressed, generally the pre-pressing time is 24 hours, and the assembly operation can only be carried out after the settlement is stable to ensure the assembly quality.

[0012] Optional, site preparation includes: cleaning, leveling and compacting the site, dividing the assembly construction area, compacting the assembly construction area, laying steel plates or replacing the filling in areas with insufficient bearing capacity, laying isolation materials when storing the segments to prevent bottom contamination, C-type segments and O-type segments should have 4 support points. In any case, the number of support points shall not be less than 3 and should not be more than 6, and tilted storage of the segments should be avoided.

[0013] Optionally, the assembly platform can be leveled, specifically including: when the segments are placed on the assembly platform, rubber pads are placed at the bottom to prevent the segments from being damaged; considering the temperature influence during the segment assembly process, the joints are placed north-south as much as possible to avoid the temperature difference affecting the assembly and cracking; the flatness of the support surface during assembly is 2mm, that is, the tolerance is ±1mm relative to the reference surface.

[0014] Optional, install vertical joint reinforcement, apply torque and install closed-hole plates, specifically including: when assembling, the diameter of the pipe segment is controlled within -10 to +10mm, the flatness is ±1mm, the misalignment is ≤5mm, the joint gap is 20-25mm, the spacing of the corrugated pipes on both sides of the vertical joint is allowed to have a tolerance of ±15mm, at least 5 fastening straps are used to fix the pipe segment, and the minimum bearing capacity of each fastening strap is not less than 2.5t. A torque wrench must be used for the installation of dowels, and the dowel torque is (80N·m-120N·m). For details, please refer to the manufacturer's instructions. After installation, workers are prohibited from climbing to the top of the pipe segment through the dowels to cause dowel contamination. Finally, the closed-hole plates are bonded.

[0015] Optionally, install a grouting pipe and perform grouting, specifically including: the grouting material needs to be stirred evenly and the water-cement ratio must not be changed at will; use grouting material that is suitable for the current temperature; use clean and unpolluted tap water for mixing; after grouting is completed, the amount of grouting material that has settled in the joints should be filled up in time; mechanical stirring should be used for stirring, and the stirring time should be no less than 5 minutes to ensure that the grouting material is stirred evenly; grouting should be carried out slowly with a flow rate of 5-10L / min and should not exceed 10L / min; the filling time of vertical joints should be controlled within 10-20 minutes; during the grouting process, if the top grouting material is found to overflow, it indicates that the grouting is complete, and the valve should be closed immediately, the grouting pipe should be blocked, and the grouting should be completed. Grouting should be avoided as much as possible during high temperature periods, and the fastening device can be removed 6 hours after the grouting is completed.

[0016] Optionally, the strength of the segments can be inspected and the assembly table can be lowered, specifically including: the segments can be lifted 18 hours after the conventional grouting is completed. The actual lifting is determined by the strength of the test block, and the lifting can be carried out only after the strength reaches 25MPa. DETAILED DESCRIPTION

[0017] The embodiment of the present invention discloses a wind power concrete tower segment assembly construction method, comprising the following contents: Prepare materials, including: epoxy resin glue (C85, C95), grouting materials (C85, C95), threaded steel bars, and closed-cell plates. The epoxy resin glue and grouting materials should be stacked neatly, with wooden blocks underneath and rain and sun protection measures on top.

[0018] Preparation of machinery and equipment, including: crawler crane (about 300T), lifting belt, universal lifting ring, clamping ring, sealing strip, fastening belt, grouting pump, measuring scale, and mixer.

[0019] Segment quality inspection specifically includes: timely inspection of whether there are quality defects after the segments arrive at the site, timely discovery and treatment to avoid affecting the lifting. The protection status, number, size, integrity, number and location of the finished segment products are key inspection items.

[0020] The assembly platform pressing process specifically includes: the assembly platform needs to be pre-pressed before the first use. The general pre-pressing time is 24 hours. The assembly operation can only be carried out after the settlement is stable to ensure the assembly quality.

[0021] Site preparation includes: cleaning, leveling and compacting the site, dividing the assembly construction area, compacting the assembly construction area, laying steel plates or replacing the filling in areas with insufficient bearing capacity, laying isolation materials when storing the segments to prevent bottom contamination, and C-type and O-type segments should have 4 support points. Under any circumstances, the number of support points shall not be less than 3 and should not be more than 6, and the segments should not be stored at an angle.

[0022] Leveling the assembly platform specifically includes: when the segments are placed on the assembly platform, rubber pads are placed at the bottom to prevent the segments from being damaged; considering the temperature influence during the segment assembly process, the joints are placed north-south as much as possible to avoid the temperature difference affecting the assembly and cracking; the flatness of the support surface during assembly is 2mm, that is, the tolerance is ±1mm relative to the reference surface.

[0023] Install vertical joint reinforcement, apply torque and install closed-hole plates, including: when assembling, the diameter of the pipe segment is controlled within -10 to +10mm, the flatness is ±1mm, the misalignment is ≤5mm, the joint gap is 20-25mm, the spacing of the corrugated pipes on both sides of the vertical joint is allowed to have a tolerance of ±15mm, at least 5 fastening straps are used to fix the pipe segment, and the minimum bearing capacity of each fastening strap is not less than 2.5t. A torque wrench must be used for the installation of dowels, and the dowel torque is (80N·m-120N·m). For details, please refer to the manufacturer's instructions. After installation, workers are prohibited from climbing to the top of the pipe segment through the dowels to cause dowel contamination. Finally, the closed-hole plates are bonded.

[0024] Install the grouting pipe and grouting, specifically including: the grouting material needs to be stirred evenly and the water-cement ratio must not be changed at will, use grouting material suitable for the current temperature, use clean and unpolluted tap water for mixing, after grouting is completed, the settlement of the joint grouting material should be filled in time, and mechanical stirring should be used for stirring, and the stirring time should be no less than 5 minutes to ensure that the grouting material is stirred evenly. Grouting should be carried out slowly with a flow rate of 5-10L / min, and should not exceed 10L / min. The filling time of vertical joints is controlled within 10-20 minutes. During the grouting process, when the top grouting material is found to overflow, it indicates that the grouting is complete, the valve should be closed immediately, the grouting pipe should be blocked, and the grouting should be completed. Grouting should be avoided as much as possible during high temperature periods, and the fastening device can be removed 6 hours after the grouting is completed.

[0025] Installation and polishing of interior parts, specifically including: installing the required interior parts, polishing the joints up and down in front of the table to avoid affecting the hoisting and leveling.

[0026] Inspect the strength of the pipe segments and lower them to the assembly platform. Specifically, the pipe segments can be lifted 18 hours after the conventional grouting is completed. The actual lifting is determined by the strength of the test block, and the lifting can only be carried out after the strength reaches 25MPa.

[0027] Final inspection and shipment.

[0028] By adopting the above technical solution, the embodiment of the present invention effectively realizes the efficient assembly of pipe segments, the operation process is clear and definite, the operation is highly safe, and it is conducive to improving construction efficiency and construction quality.

[0029] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A wind power concrete tower tube segment assembly construction method, characterized in that: It includes the following contents: material preparation, machine preparation, segment quality inspection, assembly platform pressing, site preparation, assembly platform leveling, installation of vertical joint reinforcement, application of torque and installation of closed-hole plates, installation of grouting pipes and grouting, installation of interior parts and polishing, inspection of segment strength and lowering from the assembly platform, final inspection and shipment.

2. The wind power concrete tower segment assembly construction method according to claim 1, characterized in that: Prepare materials, including: epoxy resin glue, grouting materials, threaded steel bars, and closed-cell panels. The epoxy resin glue and grouting materials should be neatly stacked, with wooden blocks underneath and rain and sun protection measures on top.

3. The wind power concrete tower segment assembly construction method according to claim 1, characterized in that: Preparation of machinery and equipment, including: crawler crane, lifting belt, universal lifting ring, clamping ring, sealing strip, fastening belt, grouting pump, measuring scale, and mixer.

4. The wind power concrete tower segment assembly construction method according to claim 1, characterized in that: Segment quality inspection specifically includes: timely inspection of whether there are quality defects after the segments arrive at the site, timely discovery and treatment to avoid affecting the lifting. The protection status, number, size, integrity, number and location of the finished segment products are key inspection items.

5. The wind power concrete tower segment assembly construction method according to claim 1, characterized in that: The assembly platform pressing process specifically includes: the assembly platform needs to be pre-pressed before the first use. The general pre-pressing time is 24 hours. The assembly operation can only be carried out after the settlement is stable to ensure the assembly quality.

6. The wind power concrete tower segment assembly construction method according to claim 1, characterized in that: Site preparation includes: cleaning, leveling and compacting the site, dividing the assembly construction area, compacting the assembly construction area, laying steel plates or replacing the filling in areas with insufficient bearing capacity, laying isolation materials when storing the segments to prevent bottom contamination, and C-type and O-type segments should have 4 support points. Under any circumstances, the number of support points shall not be less than 3 and should not be more than 6, and the segments should not be stored at an angle.

7. The wind power concrete tower segment assembly construction method according to claim 1, characterized in that: Leveling the assembly platform specifically includes: when the segments are placed on the assembly platform, rubber pads are placed at the bottom to prevent the segments from being damaged; considering the temperature influence during the segment assembly process, the joints are placed north-south as much as possible to avoid the temperature difference affecting the assembly and cracking; the flatness of the support surface during assembly is 2mm, that is, the tolerance is ±1mm relative to the reference surface.

8. The wind power concrete tower segment assembly construction method according to claim 1, characterized in that: Install vertical joint reinforcement, apply torque and install closed-hole plates, including: when assembling, the diameter of the pipe segment is controlled within -10 to +10mm, the flatness is ±1mm, the misalignment is ≤5mm, the joint gap is 20-25mm, the spacing of the corrugated pipes on both sides of the vertical joint is allowed to have a tolerance of ±15mm, at least 5 fastening straps are used to fix the pipe segment, and the minimum bearing capacity of each fastening strap is not less than 2.5t. A torque wrench must be used for the installation of dowels, and the dowel torque is (80N·m-120N·m). For details, please refer to the manufacturer's instructions. After installation, workers are prohibited from climbing to the top of the pipe segment through the dowels to cause dowel contamination. Finally, the closed-hole plates are bonded.

9. The wind power concrete tower segment assembly construction method according to claim 1, characterized in that: Install the grouting pipe and grouting, specifically including: the grouting material needs to be stirred evenly and the water-cement ratio must not be changed at will, use grouting material suitable for the current temperature, use clean and unpolluted tap water for mixing, after grouting is completed, the settlement of the joint grouting material should be filled in time, and mechanical stirring should be used for stirring, and the stirring time should be no less than 5 minutes to ensure that the grouting material is stirred evenly. Grouting should be carried out slowly with a flow rate of 5-10L / min, and should not exceed 10L / min. The filling time of vertical joints is controlled within 10-20 minutes. During the grouting process, when the top grouting material is found to overflow, it indicates that the grouting is complete, the valve should be closed immediately, the grouting pipe should be blocked, and the grouting should be completed. Grouting should be avoided as much as possible during high temperature periods, and the fastening device can be removed 6 hours after the grouting is completed.

10. The wind power concrete tower segment assembly construction method according to claim 1, characterized in that: Inspect the strength of the pipe segments and lower them to the assembly platform. Specifically, the pipe segments can be lifted 18 hours after the conventional grouting is completed. The actual lifting is determined by the strength of the test block, and the lifting can only be carried out after the strength reaches 25MPa.