CN111946556B - Construction positioning method for precast concrete shell ring - Google Patents
Construction positioning method for precast concrete shell ring Download PDFInfo
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- CN111946556B CN111946556B CN202010746735.4A CN202010746735A CN111946556B CN 111946556 B CN111946556 B CN 111946556B CN 202010746735 A CN202010746735 A CN 202010746735A CN 111946556 B CN111946556 B CN 111946556B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/10—Assembly of wind motors; Arrangements for erecting wind motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/728—Onshore wind turbines
Abstract
The invention discloses a construction positioning method of a precast concrete shell ring, which comprises the following steps: 1. a pair of first positioning long holes (11) and a pair of second positioning long holes (12) which are vertical to each other are reserved at the top of the shell ring; 2. a pair of first sleeves and a pair of second sleeves are embedded at the bottom of the shell ring; 3. the bottom of the middle cylinder section (200) is provided with a first positioning rib (21) through a first sleeve, and when the middle cylinder section is hung on the lower cylinder section (100), the first positioning rib is inserted into a first positioning long hole of the lower cylinder section; 4. the bottom of the upper cylinder section (300) is internally provided with a second positioning rib (22) through a second sleeve, so that when the upper cylinder section is hoisted on the middle cylinder section, the second positioning rib is inserted into a second positioning long hole of the middle cylinder section. The invention can quickly center the upper and lower shell ring, avoid the problems of hoisting eccentric error, shell ring prefabricated size error, reserved positioning hole position error and the like, improve the shell ring positioning precision and efficiency, resist the horizontal load of the shell ring by the positioning ribs and improve the shell ring construction quality.
Description
Technical Field
The invention relates to a construction method of a concrete wind turbine generator system tower, in particular to a construction positioning method of a precast concrete shell ring.
Background
Wind power generation is used as a clean energy technology and is widely applied to the three north area with good wind resources in China. As the development of the "three north" region is becoming saturated, wind power generation is progressing toward the inland region. Because the wind speed in the inland area is lower, and the power of the wind generating set is increased day by day, the diameter of the wind wheel is increased more and more, and the height of the tower barrel is also increased more and more.
At present, the height of a tower barrel of a land wind generating set in China reaches 120-160m, in order to reduce production, transportation and construction difficulty, a concrete tower barrel is generally prefabricated in sections and fragments, namely, the concrete tower barrel is divided into a plurality of barrel sections along the height direction of the tower barrel, the concrete tower barrel is divided into a plurality of barrel fragments along the circumferential direction of the barrel sections, the concrete tower barrel is transported to the site after being prefabricated in a factory, assembled on a special assembly platform, lifted in a whole section after being assembled, and prestress is applied to the whole concrete tower barrel part to form a whole.
In the hoisting process of the shell ring, the shell ring is connected in various ways. At present, most of the methods adopt plane butt joint, namely the bottom surface of the upper cylinder section and the top surface of the lower cylinder section are both planes, no lug boss is arranged, and no dowel bar is required to be reserved. As the precision of the precast concrete is difficult to realize absolute leveling, the lower shell ring is generally leveled by a gasket with the thickness of 1-3mm after the hoisting of the lower shell ring is finished on a hoisting site, then the upper shell ring is coated with the setting slurry, and then the upper shell ring is hoisted, so that the full-section contact of the upper shell ring and the lower shell ring can be ensured, and the stress performance can be further ensured. Although the hoisting method is simple, when the strength of the setting slurry does not reach the design and the upper shell ring is subjected to horizontal force of loads such as wind and the like, the horizontal force of the loads can be resisted only by the friction force generated by the self weight of the shell ring, the hoisting precision of the shell ring is easily influenced, particularly, when the steel shell ring and the concrete shell ring are hoisted, the friction coefficient between steel and concrete is small, and the horizontal slippage between the steel and concrete shell rings is easily generated. Meanwhile, in the hoisting process, constructors need to repeatedly adjust the position of the upper shell ring to ensure the centering of the upper shell ring and the lower shell ring according to own observation, and the construction efficiency is low.
Disclosure of Invention
The invention aims to provide a construction positioning method of a precast concrete shell ring, which can quickly center an upper shell ring and a lower shell ring, improve the positioning precision and efficiency of the shell ring, and meanwhile, a positioning rib can be used as a shear-resistant structure to resist the horizontal load of the shell ring, thereby improving the construction quality of the shell ring.
The invention is realized by the following steps:
a construction positioning method for a precast concrete shell ring comprises the following steps:
step 1: a pair of first positioning long holes and a pair of second positioning long holes are reserved at the top of the cylinder section, and the length direction of the first positioning long holes is vertical to that of the second positioning long holes;
step 2: a pair of first sleeves and a pair of second sleeves are embedded at the bottom of the shell ring along the shell ring;
and step 3: the first positioning ribs are movably arranged in the pair of first sleeves at the bottom of the middle cylinder section, so that when the middle cylinder section is hung on the lower cylinder section, the two first positioning ribs can be respectively and correspondingly inserted into the pair of first positioning long holes of the lower cylinder section, and the middle cylinder section and the lower cylinder section can relatively move along the length direction of the first positioning long holes;
and 4, step 4: and second positioning ribs are movably arranged in the pair of second sleeves at the bottom of the upper cylinder section, so that when the upper cylinder section is hung on the middle cylinder section, the two second positioning ribs can be correspondingly inserted into the pair of second positioning long holes of the middle cylinder section respectively, and the upper cylinder section and the middle cylinder section can relatively move along the length direction of the second positioning long holes.
The centers of the pair of first positioning long holes and the pair of second positioning long holes are uniformly arranged along the circumferential direction of the shell ring respectively, the length directions of the pair of first positioning long holes are parallel to each other, and the length directions of the pair of second positioning long holes are parallel to each other.
The length of the first positioning long hole and the length of the second positioning long hole are both 100mm, the width of the first positioning long hole and the width of the second positioning long hole are both 42mm, and the depth of the first positioning long hole and the depth of the second positioning long hole are both 10-15 mm.
In two adjacent layers of the shell sections, the reference circle diameter of the upper layer shell section where the pair of first sleeves and the pair of second sleeves are located is the same as the reference circle diameter of the lower layer shell section where the pair of first positioning long holes and the pair of second positioning long holes are located, the pair of first sleeves of the upper layer shell section are respectively aligned with the pair of first positioning long holes of the lower layer shell section, and the pair of second sleeves of the upper layer shell section are respectively aligned with the pair of second positioning long holes of the lower layer shell section.
The length of the first positioning rib extending out of the bottom of the middle cylinder section is smaller than the depth of the first positioning long hole.
The length of the first positioning rib extending out of the bottom of the middle cylinder section is 3-5mm less than the depth of the first positioning long hole.
The diameter of the first positioning rib is equivalent to the width of the first positioning long hole.
The length of the second positioning rib extending out of the bottom of the upper cylinder section is smaller than the depth of the second positioning long hole.
The length of the second positioning rib extending out of the bottom of the upper cylinder section is 3-5mm less than the depth of the second positioning long hole.
The diameter of the second positioning rib is equivalent to the width of the second positioning long hole.
Compared with the prior art, the invention has the following beneficial effects:
1. the positioning long hole is provided with the long strip-shaped positioning long hole, so that the positioning rib can be ensured to be inserted into the positioning long hole, the problem that the positioning round hole and the positioning rod cannot be centered and positioned due to preset position errors, manufacturing precision errors of the barrel sections (pieces) and the like in the prior art can be solved, and meanwhile, fine adjustment of verticality of the adjacent barrel sections in the X axial direction or the Y axial direction can be realized, and alignment and adjustment of the barrel sections can be realized.
2. According to the invention, the first positioning long hole and the second positioning long hole which are perpendicular to each other are arranged on the shell ring, and the shell ring is hoisted in an X-axis and Y-axis staggered positioning mode, so that the shell ring is limited to move and adjust relative to the shell ring above and below the shell ring in one direction, and the adjusting direction between two adjacent shell rings is perpendicular, so that the purpose of eccentric adjustment of the shell ring is achieved, and the final verticality is ensured to be within the design range.
3. According to the invention, the hoisting and positioning of the adjacent shell sections can be realized only by adopting two positioning ribs, and meanwhile, the shearing resistance can be provided by the positioning ribs to resist horizontal loads such as wind power and the like, so that the horizontal anti-sliding capacity of the shell sections is increased, and the safety and stability of hoisting the shell sections are improved.
The invention can quickly center the upper and lower shell rings, is convenient for hoisting and aligning adjustment of the shell rings, can avoid hoisting precision errors caused by hoisting eccentric errors, shell ring prefabricated size errors, reserved positioning hole position errors and other problems, improves the positioning precision and efficiency of the shell rings, and simultaneously can use the first positioning ribs and the second positioning ribs as shear resistant structures to resist the horizontal load of the shell rings, thereby improving the construction quality of the shell rings.
Drawings
FIG. 1 is a schematic layout view of a first positioning slot and a second positioning slot on a lower shell ring in the method for positioning a precast concrete shell ring in construction according to the present invention;
FIG. 2 is a perspective view of a middle shell ring in the method for positioning a precast concrete shell ring according to the present invention;
FIG. 3 is a perspective view of an upper shell ring in the method for positioning a precast concrete shell ring according to the present invention;
FIG. 4 is a schematic view of a tower drum hoisted by the construction positioning method of the precast concrete shell ring of the present invention.
In the figure, 11 first positioning long holes, 12 second positioning long holes, 21 first positioning ribs, 22 second positioning ribs, 100 lower cylindrical sections, 200 middle cylindrical sections and 300 upper cylindrical sections.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
A construction positioning method for a precast concrete shell ring comprises the following steps:
referring to fig. 1, step 1: a pair of first positioning long holes 11 and a pair of second positioning long holes 12 are reserved at the tops of all shell sections of precast concrete, the length direction of the first positioning long holes 11 is perpendicular to the length direction of the second positioning long holes 12, the length directions of the pair of first positioning long holes 11 are parallel to each other, and the length directions of the pair of second positioning long holes 12 are parallel to each other.
The centers of the pair of first positioning long holes 11 and the pair of second positioning long holes 12 are respectively and uniformly arranged along the circumferential direction of the shell ring, namely, the adjacent first positioning long holes 11 and the second positioning long holes 12 are arranged at intervals of 90 degrees.
Preferably, the length of each first positioning long hole 11 and the length of each second positioning long hole 12 are both 100mm, the width of each first positioning long hole is 42mm, and the depth of each first positioning long hole is 10-15mm, so that the relative adjustment amplitude of two adjacent sections of shell sections can reach 100 mm.
Step 2: a pair of first sleeves and a pair of second sleeves (not shown in the figure) are embedded in the bottom of all shell legs of precast concrete along the annular direction of the shell legs, in two adjacent layers of shell legs, the reference circle diameter of the pair of first sleeves and the pair of second sleeves in the upper layer shell leg is consistent with the reference circle diameter of the pair of first positioning long holes 11 and the pair of second positioning long holes 12 in the lower layer shell leg, the pair of first sleeves of the upper layer shell leg is aligned with the pair of first positioning long holes 11 of the lower layer shell leg respectively, and the pair of second sleeves of the upper layer shell leg is aligned with the pair of second positioning long holes 12 of the lower layer shell leg respectively, so that the adjacent shell legs can be assembled in a centering mode.
For convenience of explaining the hoisting process of the shell ring from bottom to top, taking the hoisting of the adjacent three shell rings as an example, namely, the lower shell ring 100 located below, the middle shell ring 200 located in the middle and the upper shell ring 300 located above, after the lower shell ring 100 is fixed, the middle shell ring 200 and the upper shell ring 300 are hoisted upwards in sequence.
Please refer to fig. 2, step 3: the first positioning ribs 21 are movably arranged in the pair of first sleeves at the bottom of the middle cylinder section 200, so that when the middle cylinder section 200 is hung on the lower cylinder section 100, the two first positioning ribs 21 can be correspondingly inserted into the pair of first positioning long holes 11 of the lower cylinder section 100 respectively, and the middle cylinder section 200 and the lower cylinder section 100 can relatively move along the length direction of the first positioning long holes 11. When the first positioning rib 21 of the middle shell ring 200 is inserted into the first positioning long hole 11 of the lower shell ring 100, it can be used as a shear structure to resist horizontal loads such as wind power and avoid horizontal slippage between adjacent shell rings.
The length of the first positioning rib 21 extending out of the bottom of the middle cylinder section 200 is slightly smaller than the depth of the first positioning long hole 11, and preferably, the length of the first positioning rib 21 extending out of the bottom of the middle cylinder section 200 is 3-5mm smaller than the depth of the first positioning long hole 11.
The diameter of the first positioning rib 21 is equivalent to the width of the first positioning long hole 11, so that relative movement between the middle cylindrical shell 200 and the lower cylindrical shell 100 in the width direction of the first positioning long hole 11 can be prevented.
Please refer to fig. 3, step 4: the second positioning ribs 22 are movably installed in the pair of second sleeves at the bottom of the upper cylinder section 300, so that when the upper cylinder section 300 is hung on the middle cylinder section 200, the two second positioning ribs 22 can be correspondingly inserted into the pair of second positioning long holes 12 of the middle cylinder section 200 respectively, and the upper cylinder section 300 and the middle cylinder section 200 can relatively move along the length direction of the second positioning long holes 12.
The length of the second positioning rib 22 extending out of the bottom of the upper cylinder section 300 is slightly smaller than the depth of the second positioning long hole 12, and preferably, the length of the second positioning rib 22 extending out of the bottom of the upper cylinder section 300 is 3-5mm smaller than the depth of the second positioning long hole 12. When the second positioning rib 22 of the upper shell ring 300 is inserted into the second positioning long hole 12 of the middle shell ring 200, it can be used as a shear structure to resist horizontal loads such as wind power and avoid horizontal slippage between adjacent shell rings.
The diameter of the second positioning rib 22 is equivalent to the width of the second positioning long hole 12, and relative movement between the middle shell ring 200 and the upper shell ring 300 in the width direction of the second positioning long hole 12 can be prevented.
Example 1:
referring to fig. 1 to 4, the center of the top surface of the shell ring is taken as the origin, coordinate axes are set on the top surface of the shell ring, a pair of first long positioning holes 11 with the length direction parallel to the X axis and a pair of second long positioning holes 12 with the length direction parallel to the Y axis are set on the top surface of the shell ring, that is, the first long positioning holes 11 and the adjacent second long positioning holes 12 are set at an interval of 90 °, the center connecting line of the pair of first long positioning holes 11 is parallel to the Y axis, and the center connecting line of the pair of second long positioning holes 12 is parallel to the X axis. The dimensions of the first positioning long hole 11 and the second positioning long hole 12 are: 100mm long, 42mm wide and 15mm deep.
Four 39 threaded sleeves, namely a pair of first sleeves and a pair of second sleeves which are uniformly arranged along the circumferential direction of the shell ring, are embedded in the bottom surface of the shell ring. In two adjacent shell rings, the reference circle diameter of the centers of the four 39 threaded sleeves of the shell ring on the upper layer is consistent with the reference circle diameter of the centers of the pair of first positioning long holes 11 and the pair of second positioning long holes 12 of the shell ring on the lower layer.
And a second positioning rib 22 made of 39 threaded steel bars is correspondingly arranged in a pair of second sleeves of the upper cylinder section 300, and the length of the second positioning rib 22 extending out of the bottom surface of the upper cylinder section 300 is 10 mm. When the upper shell ring 300 is hoisted to the middle shell ring 200, the pair of second positioning ribs 22 are correspondingly inserted into the pair of second positioning long holes 12 of the middle shell ring 200, so that the upper shell ring 300 can move and be adjusted relative to the middle shell ring 200 along the Y-axis direction, and the upper shell ring 300 and the middle shell ring 200 are kept consistent in the X-axis direction, and the problems of hoisting eccentricity, prefabricated size error, reserved hole position error and the like of the middle shell ring 200 and the upper shell ring 300 are solved.
And continuing to hoist the other cylindrical section, taking the middle cylindrical section 200 as the lowest cylindrical section, and repeating the steps to finish the hoisting of the other cylindrical section. Every three adjacent shell legs are in a group and are hoisted in a staggered positioning mode, the steps are repeated until all shell legs of the concrete tower barrel are hoisted, and through staggered limitation between positioning ribs and positioning long holes on the three adjacent shell legs, hoisting eccentric errors in the X direction or the Y direction among the shell legs, prefabrication precision errors of the shell legs in the X direction or the Y direction, and embedded position errors of a first sleeve and a second sleeve in each shell leg can be digested and compensated through the first positioning long holes and the second positioning long holes, and meanwhile movement adjustment in the X direction or the Y direction in a certain range is provided, so that the verticality of the tower barrel in the X axial direction and the Y axial direction meets the standard requirements.
The present invention is not limited to the above embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A construction positioning method of a precast concrete shell ring is characterized by comprising the following steps: the method comprises the following steps:
step 1: a pair of first positioning long holes (11) and a pair of second positioning long holes (12) are reserved at the top of the cylinder section, and the length direction of the first positioning long holes (11) is vertical to the length direction of the second positioning long holes (12);
step 2: a pair of first sleeves and a pair of second sleeves are embedded at the bottom of the shell ring along the shell ring;
and step 3: the first positioning ribs (21) are movably arranged in the pair of first sleeves at the bottom of the middle barrel section (200), so that when the middle barrel section (200) is hung on the lower barrel section (100), the two first positioning ribs (21) can be respectively inserted into the pair of first positioning long holes (11) of the lower barrel section (100) correspondingly, and the middle barrel section (200) and the lower barrel section (100) can relatively move along the length direction of the first positioning long holes (11);
and 4, step 4: second positioning ribs (22) are movably mounted in the pair of second sleeves at the bottom of the upper cylinder section (300), so that when the upper cylinder section (300) is hung on the middle cylinder section (200), the two second positioning ribs (22) can be correspondingly inserted into the pair of second positioning long holes (12) of the middle cylinder section (200) respectively, and the upper cylinder section (300) and the middle cylinder section (200) can relatively move along the length direction of the second positioning long holes (12);
the centers of the pair of first positioning long holes (11) and the pair of second positioning long holes (12) are uniformly arranged along the circumferential direction of the cylinder section respectively, the length directions of the pair of first positioning long holes (11) are parallel to each other, and the length directions of the pair of second positioning long holes (12) are parallel to each other.
2. The method for positioning the precast concrete shell ring in construction according to claim 1, wherein: the length of the first positioning long hole (11) and the length of the second positioning long hole (12) are both 100mm, the width of the first positioning long hole is both 42mm, and the depth of the first positioning long hole is both 10-15 mm.
3. The method for positioning the precast concrete shell ring in construction according to claim 1, wherein: in two adjacent layers of the shell ring, the reference circle diameter where a pair of first sleeves and a pair of second sleeves are located in the upper layer shell ring is consistent with the reference circle diameter where a pair of first positioning long holes (11) and a pair of second positioning long holes (12) are located in the lower layer shell ring, the pair of first sleeves of the upper layer shell ring is aligned with the pair of first positioning long holes (11) of the lower layer shell ring respectively, and the pair of second sleeves of the upper layer shell ring is aligned with the pair of second positioning long holes (12) of the lower layer shell ring respectively.
4. The method for positioning the precast concrete shell ring in construction according to claim 1, wherein: the length of the first positioning rib (21) extending out of the bottom of the middle cylinder section (200) is smaller than the depth of the first positioning long hole (11).
5. The precast concrete shell ring construction positioning method as claimed in claim 4, wherein: the length of the first positioning rib (21) extending out of the bottom of the middle cylinder section (200) is 3-5mm less than the depth of the first positioning long hole (11).
6. The precast concrete shell ring construction positioning method according to claim 1 or 4, characterized in that: the diameter of the first positioning rib (21) is equivalent to the width of the first positioning long hole (11).
7. The method for positioning the precast concrete shell ring in construction according to claim 1, wherein: the length of the second positioning rib (22) extending out of the bottom of the upper cylinder section (300) is less than the depth of the second positioning long hole (12).
8. The method for positioning the precast concrete shell ring during construction according to claim 7, wherein: the length of the second positioning rib (22) extending out of the bottom of the upper cylinder section (300) is 3-5mm less than the depth of the second positioning long hole (12).
9. The precast concrete shell ring construction positioning method according to claim 1 or 7, characterized in that: the diameter of the second positioning rib (22) is equivalent to the width of the second positioning long hole (12).
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| CN113602954A (en) * | 2021-07-16 | 2021-11-05 | 上海市机电设计研究院有限公司 | Single hoisting method for multiple concrete shell sections |
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| CN209586591U (en) * | 2018-12-18 | 2019-11-05 | 青岛众诚钢结构有限公司 | A kind of wind power tower drum |
| CN210636636U (en) * | 2019-05-06 | 2020-05-29 | 襄阳新普电气化工程有限公司 | Building installation portable built-in fitting |
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