CN114603321B - Machining method for hyperboloid template of variable-section cylindrical pier - Google Patents
Machining method for hyperboloid template of variable-section cylindrical pier Download PDFInfo
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- CN114603321B CN114603321B CN202210217457.2A CN202210217457A CN114603321B CN 114603321 B CN114603321 B CN 114603321B CN 202210217457 A CN202210217457 A CN 202210217457A CN 114603321 B CN114603321 B CN 114603321B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/24—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass dies
Abstract
The invention relates to a processing method of a hyperboloid template of a variable-section cylindrical pier, which comprises the steps of bending a plurality of strip-shaped steel plates into a semicircle along the longitudinal direction, welding a plurality of semicircular steel plates into a whole along the transverse direction in sequence according to the height of one pouring section of a pier column, and assembling a plurality of steel plates by adopting a straight-substitution bending method according to the longitudinal curvature of the pier column section to form a hyperboloid template; polishing and flattening the welding seam on the inner wall of the hyperboloid template; brushing a layer of putty along the welding line of the inner wall of the template, filling the pit part with the putty, and polishing the putty to be smooth after the putty is dried; then the inner wall of each template is coated with template paint, and the template paint can be used after the surface of the template paint is dried. The invention can greatly reduce the template processing cost on the premise of ensuring the template processing quality.
Description
Technical Field
The invention belongs to the technical field of bridge construction, relates to construction of a variable-section cylindrical pier, and particularly relates to a machining method of a hyperboloid template for casting construction of a variable-section cylindrical pier.
Background
In bridge design, cylindrical piers are sometimes designed into vase-shaped variable cross-section structures for aesthetic purposes or stress performance requirements. The bridge pier is usually cast by sections, and the templates of each section are buckled by two templates with semicircular cross sections. In order to adapt to the variable cross section of the pier stud, each template is of a hyperboloid structure, namely, the templates have a certain radian in the transverse direction and the longitudinal direction.
The processing difficulty of the hyperboloid template is high. If a whole steel plate is adopted for stamping forming, such as a hyperboloid arc steel template manufacturing tool disclosed in CN212599888U or a hyperboloid template forming machine and a using method thereof disclosed in CN111674075A, each pier column needs a plurality of templates with different specifications, a plurality of dies with different specifications are needed, the template consumption of each specification is smaller, and the processing cost is higher; the machining precision requirement of the hyperboloid template is extremely high, once the precision deviation exceeds a standard value, or the template is deformed in the transportation or use process, the template is generally difficult to repair, the whole template cannot be used, and the construction progress can be influenced.
Disclosure of Invention
The invention aims to solve the problems and provide a method for processing the hyperboloid template of the variable cross-section cylindrical pier, which reduces the processing cost of the template.
The technical scheme of the invention is as follows:
the processing method of the hyperboloid template of the variable cross-section cylindrical pier is characterized by comprising the following steps of:
(1) Bending a plurality of strip-shaped steel plates into a semicircle along the longitudinal direction, wherein the length of each steel plate is consistent with the outer diameter of a pier column section at a certain height;
(2) According to the height of one pouring section of the pier column, a plurality of semicircular steel strips are welded into a whole in sequence along the transverse direction, and a plurality of steel plates are assembled by adopting a direct substitution bending method according to the longitudinal curvature of the pier column section to form a hyperboloid template;
(3) Polishing the welding seam on the inner wall of the hyperboloid template, and polishing the protruding part to be smooth;
(4) Cleaning the inner wall of the hyperboloid template by adopting an organic solution, thoroughly removing rust and greasy dirt at the positions, and finally cleaning by using clear water;
(5) Brushing putty along the welding lines on the inner wall of the template, filling the pit parts with the putty tightly, wherein the brushing thickness of each welding line putty is 2-3mm higher than that of the inner wall of the template, and the brushing width is not more than 5cm;
(6) After the putty is dried, firstly carrying out coarse grinding on the putty along the welding line direction by using 100-mesh sand paper, then carrying out fine grinding by using 360-mesh sand paper, and adopting a curved surface guiding rule to check until the flatness of the welding line meets the standard value;
(7) Brushing template paint on the inner wall of the whole template by adopting a roller brush; the brushing direction is parallel to the welding line, and can only be brushed along one direction; coating each template paint once, and can not be used for coating without brush leakage, wherein the coating standard is 10-15 square meters per kg;
(8) After the surface of the template paint is dried, a clean plastic cloth is adopted for covering, and the template paint can be used for pier column concrete construction after being dried for 24 hours.
According to the invention, a plurality of strip steel plates are welded into the hyperboloid template by adopting a direct bending method, and the welding seams of the template are polished and repaired by putty, so that the hyperboloid curve line type of the pier column can be satisfied, and the template processing cost can be greatly reduced on the premise of ensuring the template processing quality.
Drawings
FIG. 1 is a construction flow diagram of the present invention;
FIG. 2 is a schematic view of a strip steel plate bent in a semicircular shape;
FIG. 3 is a side view of a hyperboloid form of the present invention welded in straight substitution using a plurality of semicircular steel strips;
fig. 4 is a vertical cross-sectional view of the hyperboloid template of the present invention.
Detailed Description
The construction flow of the invention is shown in figure 1, and specifically comprises the following steps:
(1) As shown in fig. 2, a plurality of strip steel plates 1 are bent in a longitudinal direction to be semicircular, and the length of each steel plate is identical to the outer diameter of the pier at a certain height of one pier column section.
In practice, the width of each strip is generally not more than 15cm.
(2) As shown in fig. 3 and 4, according to the height of one pouring section of the pier stud, a plurality of semicircular steel strips 1 are welded into a whole in sequence along the transverse direction according to the corresponding pier stud parts, and a plurality of steel plates are assembled by adopting a straight-bending substitution method according to the longitudinal curvature of the pier stud section to form a hyperboloid template 2.
In the specific welding process, when welding every two steel plates, the welding is performed in a mode of first jump welding and then repair welding, so that the whole deformation of the steel plates is prevented.
And in the welding process and after the welding is finished, adopting a 20cm and 60cm curved surface guiding rule to carry out full-section detection on the template, correcting the positions with the curvature which does not meet the requirement one by one, and cutting the positions with the deviation exceeding the allowable range to carry out welding again.
(3) Because each welding seam is likely to have the uneven phenomenon during welding, the welding seam on the inner wall of the hyperboloid template is polished, the protruding part is polished smoothly, and the height of the protruding part is ensured not to exceed 1mm.
(4) And (3) cleaning the inner wall of the hyperboloid template by adopting an organic solution, thoroughly removing rust and greasy dirt, and finally cleaning by using clear water.
(5) And (3) brushing putty along the welding lines on the inner wall of the template, filling the pit parts with the putty tightly, wherein the brushing thickness of each welding line putty is 2-3mm higher than the inner wall of the template, and the brushing width is not more than 5cm.
(6) After the putty is dried, firstly carrying out rough grinding on the putty along the welding line direction by using 100-mesh sand paper, and when the putty is ground to be close to the design line type of the template, carrying out fine grinding by using 360-mesh sand paper and checking by using a curved guiding rule until the flatness of the welding line meets the standard value.
(7) Brushing template paint on the inner wall of the whole template by adopting a roller brush; the brushing direction is parallel to the welding line, and can only be brushed along one direction; the stencil paint is painted once, and no brush leakage exists, and the painting standard is 10-15 square meters per kg.
During concrete construction, two layers of silk stockings can be sleeved on the roller, so that the fluff of the roller is prevented from adhering to the surface of the template, and the template paint can be uniformly painted.
Because the curing time of the stencil paint is relatively short, about 2 minutes, each pass of the stencil paint from one end to the other in the transverse direction of the stencil should be finished within 2 minutes.
(8) After the surface of the template paint is dried, clean plastic cloth is adopted to cover the template paint, so that rainwater or other pollution to the template paint surface is prevented. The painted template paint can be surface-dried (touched by hand, the surface is flat and smooth, the paint film can be judged to be surface-dried without being stained with water) after 1 hour, and can be used for concrete construction after 24 hours of airing.
Claims (5)
1. The processing method of the hyperboloid template of the variable cross-section cylindrical pier is characterized by comprising the following steps of:
(1) Bending a plurality of strip-shaped steel plates into a semicircle along the longitudinal direction, wherein the length of each steel plate is consistent with the outer diameter of a pier column section at a certain height;
(2) According to the height of one pouring section of the pier column, a plurality of semicircular steel strips are welded into a whole in sequence along the transverse direction, and a plurality of steel plates are assembled by adopting a direct substitution bending method according to the longitudinal curvature of the pier column section to form a hyperboloid template;
(3) Polishing the welding seam on the inner wall of the hyperboloid template, and polishing the protruding part to be smooth;
(4) Cleaning the inner wall of the hyperboloid template by adopting an organic solution, thoroughly removing rust and greasy dirt at the positions, and finally cleaning by using clear water;
(5) Brushing putty along the welding lines on the inner wall of the template, filling the pit parts with the putty tightly, wherein the brushing thickness of each welding line putty is 2-3mm higher than that of the inner wall of the template, and the brushing width is not more than 5cm;
(6) After the putty is dried, firstly carrying out coarse grinding on the putty along the welding line direction by using 100-mesh sand paper, then carrying out fine grinding by using 360-mesh sand paper, and adopting a curved surface guiding rule to check until the flatness of the welding line meets the standard value;
(7) Brushing template paint on the inner wall of the whole template by adopting a roller brush; the brushing direction is parallel to the welding line, and can only be brushed along one direction; coating each template paint once, and can not be used for coating without brush leakage, wherein the coating standard is 10-15 square meters per kg;
(8) After the surface of the template paint is dried, a clean plastic cloth is adopted for covering, and the template paint can be used for pier column concrete construction after being dried for 24 hours.
2. The method for processing the hyperboloid template of the variable cross-section cylindrical pier according to claim 1, which is characterized in that: the width of each strip steel plate is not more than 15cm.
3. The method for processing the hyperboloid template of the variable cross-section cylindrical pier according to claim 1, which is characterized in that: and (3) when welding every two steel plates in the step (2), the welding is performed in a mode of first jump welding and then repair welding, so that the whole deformation of the steel plates is prevented.
4. The method for processing the hyperboloid template of the variable cross-section cylindrical pier according to claim 1, which is characterized in that: in the step (2), during and after the welding of the hyperboloid template, full-section detection is carried out on the template by adopting a 20cm and 60cm curved surface guiding rule, positions with curvature which do not meet the requirement are corrected one by one, and positions with deviation exceeding an allowable range are cut off for welding again.
5. The method for processing the hyperboloid template of the variable cross-section cylindrical pier according to claim 1, which is characterized in that: in the step (7), each template paint from one end to the other end along the transverse direction of the template is painted within 2 minutes.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210217457.2A CN114603321B (en) | 2022-03-07 | 2022-03-07 | Machining method for hyperboloid template of variable-section cylindrical pier |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210217457.2A CN114603321B (en) | 2022-03-07 | 2022-03-07 | Machining method for hyperboloid template of variable-section cylindrical pier |
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| CN114603321A CN114603321A (en) | 2022-06-10 |
| CN114603321B true CN114603321B (en) | 2023-05-05 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000301365A (en) * | 1999-04-14 | 2000-10-31 | Hitachi Ltd | Production of structural body and structural body |
| CN101913068A (en) * | 2010-07-14 | 2010-12-15 | 中国核工业华兴建设有限公司 | Preparation method of steel lining prefabricated moulding bed in nuclear power station |
| CN103255918A (en) * | 2013-05-29 | 2013-08-21 | 江苏省华建建设股份有限公司 | Concrete double-curved-surface thin shell cylinder construction method |
| CN103541543A (en) * | 2013-11-06 | 2014-01-29 | 兰州市政建设集团有限责任公司 | Resin lining steel molding plate for undevelopable cone curve face structure and manufacturing method thereof |
| CN112541226A (en) * | 2020-12-04 | 2021-03-23 | 招商局重工（江苏）有限公司 | Machining process of hyperboloid forming equipment |
-
2022
- 2022-03-07 CN CN202210217457.2A patent/CN114603321B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000301365A (en) * | 1999-04-14 | 2000-10-31 | Hitachi Ltd | Production of structural body and structural body |
| CN101913068A (en) * | 2010-07-14 | 2010-12-15 | 中国核工业华兴建设有限公司 | Preparation method of steel lining prefabricated moulding bed in nuclear power station |
| CN103255918A (en) * | 2013-05-29 | 2013-08-21 | 江苏省华建建设股份有限公司 | Concrete double-curved-surface thin shell cylinder construction method |
| CN103541543A (en) * | 2013-11-06 | 2014-01-29 | 兰州市政建设集团有限责任公司 | Resin lining steel molding plate for undevelopable cone curve face structure and manufacturing method thereof |
| CN112541226A (en) * | 2020-12-04 | 2021-03-23 | 招商局重工（江苏）有限公司 | Machining process of hyperboloid forming equipment |
Non-Patent Citations (1)
| Title |
|---|
| 装配式钢模板在泵站肘形进水流道中的应用;朱明;陈国威;;水利建设与管理(12);第1-5、30页 * |
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