CN114045794A - Method for manufacturing and installing draft tube runner template - Google Patents
Method for manufacturing and installing draft tube runner template Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 47
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- 238000009434 installation Methods 0.000 claims abstract description 23
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- 230000002787 reinforcement Effects 0.000 claims abstract description 15
- 238000013461 design Methods 0.000 claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 27
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- 238000012545 processing Methods 0.000 claims description 12
- 238000009415 formwork Methods 0.000 claims description 9
- 238000012795 verification Methods 0.000 claims description 9
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- 238000003466 welding Methods 0.000 claims description 4
- 238000009966 trimming Methods 0.000 claims description 2
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- 238000010276 construction Methods 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B5/00—Artificial water canals, e.g. irrigation canals
- E02B5/02—Making or lining canals
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B9/00—Water-power plants; Layout, construction or equipment, methods of, or apparatus for, making same
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0007—Production methods using a mold
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
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- 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
- Y02E10/20—Hydro energy
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The invention discloses a method for manufacturing and installing a draft tube runner template, which comprises the following steps: the method comprises the following steps of primary checking, three-dimensional model building, secondary checking, template drawing, template manufacturing, installation control points and lines placed on a formed concrete surface, supplementary encryption according to the control points according to the assembly requirements, assembly and panel laying by roof truss, temporary reinforcement and locking of a template, four times of checking, integral reinforcement after correct installation and installation of reinforcing steel bars among templates; the method draws a plane diagram through a three-way projection view, adopts a multi-segment line fitting curve drawing method to establish a three-dimensional model, and checks and verifies through data statistical analysis, thereby effectively solving the problem that the single line diagram data of the draft tube elbow of a manufacturer is limited, providing a precondition basis for template manufacture, and meeting the requirements of smooth transition and precision deviation of the design body type.
Description
Technical Field
The invention relates to the field of hydropower stations, in particular to a method for manufacturing and installing a draft tube runner template.
Background
The draft tube is the core part of a power generation plant, the draft tube template is one of the most complex templates in the hydropower station template engineering, the manufacturing and the installation of the template are a great difficulty in the concrete construction of the plant, the structural shape change is complex, the construction quality requirement is high, and the draft tube is limited by the engineering progress, the construction period is short, and the strength is high. The construction of the whole tail water template becomes a key factor of the progress of the factory building.
The draft tube elbow is formed by combining a plurality of geometric surfaces into a template, the template is mainly designed according to a draft tube single line diagram provided by a water turbine manufacturer, the manufacturing and installation lofting work is very complicated, particularly under the condition that the data of the designed single line diagram is limited, the difficulties of encryption processing, template design, lofting control and the like of elbow type body data are increased, a mature and fixed construction technology control mode is not available at present, and particularly, the processing of encryption, simulation and calculation of the elbow single line diagram is more to be explored and researched.
Disclosure of Invention
The invention aims to solve the technical problem that the template of the draft tube elbow pipe is lack of profile data due to the fact that part of water turbine manufacturers only provide a single line diagram at the present stage, and aims to provide a method for manufacturing and installing the draft tube runner template, which solves the problem that the template manufacturing data is obtained from the single line diagram to manufacture and install the template.
The invention is realized by the following technical scheme:
a method for manufacturing and installing a draft tube runner template comprises a manufacturing method and an installing method;
the manufacturing method comprises the following steps:
101. primary checking: analyzing a single line diagram of the draft tube elbow to obtain a data rule and verifying the data;
102. establishing a three-dimensional model: end face encryption is carried out by adopting a multi-segment line fitting curve, three views after encryption are drawn, and then a three-dimensional model is established by drawing each line to connect an arc curved surface;
103. and (4) secondary verification: analyzing a key parameter change rule of the draft tube elbow according to data provided by a single line diagram to obtain a first data result, analyzing the parameter change rule of the draft tube elbow according to a three-dimensional model to obtain a second data result, and comparing the first data result with the second data result to obtain the maximum deviation of the first data result and the second data result; if the maximum deviation is greater than the set value, modifying the three-dimensional model in the step 102 until the maximum deviation is less than the set value;
104. drawing a template drawing: performing acceptance analysis and stress calculation on the model according to the three-dimensional model, and drawing a detail processing implementation drawing;
105. template making, namely performing key point and line lofting by adopting a total station according to a detailed processing implementation drawing, performing detailed lofting according to a measurement control point and a line, and performing template making;
the installation method comprises the following steps:
201. arranging and installing control points and lines on the surface of the formed concrete, and performing supplementary encryption according to the control points and assembly requirements;
202. assembling and paving panels one by one;
203. carrying out temporary reinforcement and locking on the template, carrying out four times of verification, and carrying out integral reinforcement after the installation is determined to be correct;
204. and installing the steel bars between the formworks.
Further, the manufacturing method further comprises the following steps:
106. pre-assembling the templates: pre-assembling the templates after the templates are manufactured, and temporarily locking and reinforcing the templates;
107. and (4) checking for three times: checking the formed template, and revising the template drawing according to the checking condition until the design requirement is met;
108. and (4) storing the number: and (5) carrying out classification numbering on the templates, and disassembling and storing the formed templates.
Specifically, step 203 further includes: the whole reinforcement is carried out through the welding of the template lacing wire, and the trimming and planing are carried out on the staggered platform of the template joint, and the staggered platform is repaired to be smooth.
Further, a liner sleeve is installed at a position of a center line of the formwork, the liner sleeve including:
a first liner tube having a first end and a second end;
the first end of the first lining pipe is connected with the first end of the second lining pipe through first angle steel;
the first end of the third lining pipe is connected with the second end of the first lining pipe through a second angle steel, and the second end of the third lining pipe is connected with the second end of the second lining pipe through a third angle steel;
the first angle steel, the second angle steel and the third angle steel are detachably connected with the inner annular surface of the template.
Preferably, an included angle between the first lining pipe and the second lining pipe, an included angle between the second lining pipe and the third lining pipe, and an included angle between the first lining pipe and the third lining pipe are all 120 °.
Specifically, a plurality of reinforcing support pipes are arranged between the outer side surface of the first lining pipe and the inner annular surface of the template, between the second lining pipe and the inner annular surface of the template, and between the third lining pipe and the inner annular surface of the template, and two ends of each reinforcing support pipe are detachably connected with the lining pipe sleeve and the inner annular surface of the template respectively.
Further, the method also comprises a concrete pouring method after the template manufacturing is finished, and specifically comprises the following steps:
301. watering the template to moisten the template;
302. pouring concrete, and keeping concrete surfaces on two sides to uniformly rise;
303. leveling and vibrating synchronously;
304. after concrete pouring is finished, watering and maintaining;
305. and (4) after the concrete meets the strength requirement specified by the specification, removing the template.
Specifically, the specific method of step 303 includes: adopting a vibrator to vibrate and matching with a manual shovel holding flat bin, wherein the ratio of the time of the flat bin to the time of vibration is 1: and 3, adopting manual leveling near the template and the embedded instrument.
Preferably, the vibrator comprises an electric high-frequency insertion type vibrator with the diameter of 80mm and an electric flexible shaft insertion type vibrator with the diameter of 50 mm.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the method draws a plane diagram through a three-way projection view, adopts a multi-segment line fitting curve drawing method to establish a three-dimensional model, and checks and verifies through data statistical analysis, thereby effectively solving the problem that the single line diagram data of the draft tube elbow of a manufacturer is limited, providing a precondition basis for template manufacture, and meeting the requirements of smooth transition and precision deviation of the design body type.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the principles of the invention.
FIG. 1 is a flow chart of a draft tube runner template fabrication and installation method according to the present invention.
FIG. 2 is a first schematic illustration of the three-dimensional modeling of a draft tube according to the present invention.
FIG. 3 is a second schematic illustration of the three-dimensional modeling of the draft tube according to the present invention.
FIG. 4 is a graph of the analysis of the variation curve of the main control parameters of the draft tube according to the present invention.
FIG. 5 is a schematic view of a detailed bent arrangement of the draft tube according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the invention.
It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
In the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
This embodiment will be described with reference to the fabrication and installation examples of tailwater flow channel templates of mosque at mosque county, Suiyun.
The kylin temple hydropower station is located in the temple county in Wen county of Gansu province, is the 15 th step power station in development and planning of the Bailongjiang river basin, and is provided with three axial-flow hydraulic generators, the single-machine capacity is 37MW, the total installed capacity is 111MW, and the annual energy generation is 4.47 hundred million kilowatt hours. The tail water pipe elbow in the machine set section flow channel adopts a cast-in-place concrete structure, the height h of the tail water pipe is 13.90m, the length l is 32.21m, and the width w is 15.50 m; the special-shaped parts such as the tail water pipe elbow in the runner need to adopt prefabricated and shaped wood templates, are limited by various factors such as design size, precision, construction period, process and the like, and provide higher requirements for the manufacturing and installation progress and quality of the templates.
And provides a specification requirement that those skilled in the art be able to understand and implement:
the specification requires: the horizontal and vertical allowable deviation of the template installation is +/-5 mm, and the dislocation of adjacent panels is less than 2 mm; after concrete pouring, the deformation is allowed to be +/-5 mm horizontally and +/-10 mm vertically.
The design requirement is as follows: the smooth transition of the runner body and the local unevenness are not more than 2 mm.
Example one
The embodiment provides a method for manufacturing a draft tube runner template, which comprises the following steps:
the draft tube of the factory building of the kylin temple hydropower station is of a cast-in-place concrete structure, the single line diagram data of the draft tube provided by the factory is limited, all the data for manufacturing and installing all the templates cannot be acquired in a theoretical calculation mode, and the draft tube is derived and acquired by a scientific method on the premise that the requirements for designing the precision and smooth transition of the templates are met.
The flow channel structure is complex in size, the requirement on the appearance quality of concrete is high, the field operation field is narrow, steel bar embedded parts in a bin are dense, the construction period is tight, the construction strength is high, and the like, and the method provides extremely high control requirements for the control of various links such as the manufacturing, installation, checking and reinforcement of the draft tube shaping wood formwork.
101. Primary checking: analyzing a single line diagram of the draft tube elbow to obtain a data rule and verifying the data;
under the condition of limited basic data, the model establishment and verification required by draft tube construction directly influence the success of the whole template construction, so that related basic data must be processed first before the template is formally manufactured to calculate and obtain work, which is the basic premise of the draft tube template construction control.
Firstly, a single line diagram provided by a manufacturer is subjected to detailed analysis, a data rule is found out and is further checked, and whether an error point exists is checked in the checking process.
In this embodiment, errors are found in 2 coordinate points in the single line diagram, and verified by the authentication of the generation.
102. Establishing a three-dimensional model: end face encryption is carried out by adopting a multi-segment line fitting curve, three views after encryption are drawn, and then a three-dimensional model is established by drawing each line to connect an arc curved surface;
drawing a CAD graph through a three-way projection view, encrypting the section by adopting a multi-section line fitting curve drawing method (1-13 provide the section for a single line graph, and a-i are encrypted sections), drawing and encrypting, drawing and drawing three views by adopting an ellipse method for an arc section, connecting each drawn line with an arc curved surface by utilizing CAD software to achieve a three-dimensional model, finishing the drawing of the whole draft tube body type, inquiring coordinates of any point position of the body type at the moment, and processing any section to determine the size of a template bent frame. As shown in fig. 2 and 3.
103. And (4) secondary verification: analyzing a key parameter change rule of the draft tube elbow according to data provided by a single line diagram to obtain a first data result, analyzing the parameter change rule of the draft tube elbow according to a three-dimensional model to obtain a second data result, and comparing the first data result with the second data result to obtain the maximum deviation of the first data result and the second data result; if the maximum deviation is greater than the set value, modifying the three-dimensional model in the step 102 until the maximum deviation is less than the set value;
providing data according to a single line diagram, analyzing the change rule of key parameters of the draft tube by combining CAD (computer-aided design) and EXCEL (EXCEL software), counting and summarizing to obtain a change parameter (a first data result), checking and inspecting a three-dimensional model after determining the result, analyzing the change rule of the key parameters of the draft tube, counting and summarizing to obtain a change parameter (a second data result), if the maximum deviation of two data processing modes is 0.4mm, verifying that the requirement of design precision of a design template is met, if the maximum deviation is not 0.4mm, correcting the three-dimensional model, and repeating the process of secondary checking to ensure that the final maximum deviation is 0.4mm, wherein the condition of a statistical curve of the template parameter is shown in FIG. 4.
104. Drawing a template drawing: performing acceptance analysis and stress calculation on the model according to the three-dimensional model, and drawing a detail processing implementation drawing;
because a three-dimensional model of the draft tube is obtained, the work of obtaining related data is correspondingly simplified, the site conditions and pouring planning are comprehensively considered in the design, the arrangement structure and the reinforcing mode of the template bent are arranged,
by stress analysis and stress calculation of the template, the distance between the bent frames is 80cm, and the thickness of the wood panel is 3 cm. Drawing a processing detail implementation drawing according to the design bent arrangement, as shown in fig. 5.
105. Template making, namely performing key point and line lofting by adopting a total station according to a detailed processing implementation drawing, performing detailed lofting according to a measurement control point and a line, and performing template making;
the manufacturing method comprises the steps of building a 3m plate, erecting the bottom, making rain-proof and drainage measures in a manufacturing site, lofting key control points and lines by adopting a measuring total station according to a manufacturing detail drawing, lofting details by a manufacturer according to the measuring control points and the lines, and manufacturing a control template.
Example two
After the template is manufactured by the above method, a problem that cannot be found in the primary verification and the secondary verification may be found, so that the third verification method is provided on the basis of the first embodiment, specifically as follows:
106. pre-assembling the templates: pre-assembling the templates after the templates are manufactured, and temporarily locking and reinforcing the templates;
the template pre-assembly mainly aims to solve the problems existing in the manufacturing process through trial assembly, inspection and advance discovery, improve the treatment in advance, reduce unnecessary reworking in the field installation process and guarantee the installation quality, and the link needs to draw sufficient attention.
And carrying out temporary locking and reinforcement on the template after the pre-assembly is finished so as to ensure a stable structure and facilitate the dismantling and implementation.
107. And (4) checking for three times: checking the formed template, and revising the template drawing according to the checking condition until the design requirement is met;
the measuring personnel carry out the school to many shaping templates and examine, further perfect the template according to the school condition, find that there is the edge warp condition in upper bend template curved surface seam position in the inspection process, can't combine closely, through reanalyzing, adopt and spread 2 layers of 1.5m panel measures, under the condition that guarantees the template rigidity and does not fall, effectively improved the panel deformability, satisfy the design size requirement.
108. And (4) storing the number: and (5) carrying out classification numbering on the templates, and disassembling and storing the formed templates.
After the pre-assembly is finished, classified numbering is carried out, and the pre-assembly is properly stored according to a subsequent installation sequence, so that subsequent installation and control are facilitated, and confusion in the assembly process is avoided.
EXAMPLE III
After the first embodiment and the second embodiment are manufactured, the first embodiment and the second embodiment need to be installed, and the embodiment provides an installation method for manufacturing a draft tube runner template, which comprises the following steps:
201. arranging and installing control points and lines on the surface of the formed concrete, and performing supplementary encryption according to the control points and assembly requirements;
202. assembling and paving panels one by one;
assembling and paving panels one by one according to the installation sequence and the number in the installation process, performing measurement again to check after temporary reinforcement and locking, and performing template lacing welding and integral reinforcement after no error.
203. And temporarily reinforcing and locking the template, checking for four times, integrally reinforcing after the template is correctly installed, integrally reinforcing by welding a template lacing wire, finishing and planing wrong joints of the template, and repairing the wrong joints of the template to be flat.
After the splicing, the staggered platform of the template joint is trimmed and planed in time, and the splicing gap is repaired by means of putty scraping, strong transparent adhesive tape sticking and the like, so that the flat and smooth joint of the template is ensured, and the quality requirement is met.
For the seam surface with large local deformation, a layer of three-ply board is additionally laid, and a strong transparent adhesive tape is pasted on the periphery of the three-ply board for sealing, so that smooth transition of the body type and the quality of seam surface treatment are ensured.
After the template is checked and passes the acceptance, the subsequent working procedures such as steel bar installation can be started.
204. And installing the steel bars between the formworks.
Considering that bent section template bent frames are dense, positioning and locking reinforcement are relative, vertical bent frames are selected for the bent frames, lining sleeves are manufactured at the center line positions of the unit by steel pipes and angle steel, lining accurate positioning and reinforcement are firstly carried out before installation, bent frame installation marks are made on the lining, and assembly of the bent frames is controlled and positioning reinforcement is facilitated. The lining is manufactured according to three sections of 120 degrees and is locked by connecting bolts so as to be convenient to mount, dismount and reuse.
The liner sleeve includes: a first lining pipe, a second lining pipe and a third lining pipe.
The first lining pipe is provided with a first end and a second end, the second lining pipe is provided with a first end and a second end, and the third lining pipe is provided with a first end and a second end, namely, the first lining pipe and the third lining pipe are both of steel pipe structures.
The first end of the first lining pipe is connected with the first end of the second lining pipe through first angle steel; the first end of the third lining pipe is connected with the second end of the first lining pipe through second angle steel, and the second end of the third lining pipe is connected with the second end of the second lining pipe through third angle steel;
the first angle steel, the second angle steel and the third angle steel are detachably connected with the inner ring surface of the template, and the included angle between the first lining pipe and the second lining pipe, the included angle between the second lining pipe and the third lining pipe and the included angle between the first lining pipe and the third lining pipe are all 120 degrees.
Through setting up the inside pipe box of lining, support the template inside to can avoid when carrying out pouring of concrete, cause the collapse of template, and triangle-shaped is the most stable structure, can guarantee stability under the condition of minimum material.
And in order to further stably connect the inner cylinder pipe sleeve with the template, a plurality of reinforcing support pipes are arranged between the outer side surface of the first lining pipe and the inner ring surface of the template, between the second lining pipe and the inner ring surface of the template and between the third lining pipe and the inner ring surface of the template, and two ends of each reinforcing support pipe are detachably connected with the inner lining pipe sleeve and the inner ring surface of the template respectively.
The stress of the template is transferred to the inner barrel casing pipe through the reinforcing support pipe, so that the strength of the inner barrel casing pipe needs to be guaranteed, the stability of the template is increased, meanwhile, the template is connected through the bolt, and the template can be conveniently detached and used next time.
Example four
After the installation of the formwork of the third embodiment is completed, concrete pouring is required, and the embodiment provides a concrete pouring method after the formwork is manufactured, which specifically comprises the following steps:
301. watering the template to moisten the template;
this operation is to prevent the dried wood from adhering to the concrete to form an appearance quality defect such as a pitted surface.
302. Pouring concrete, and keeping concrete surfaces on two sides to uniformly rise;
in the concrete pouring process, the pouring strength is controlled, the concrete surfaces on the two sides are kept to uniformly rise, and the deformation and the die running of the template caused by the lateral pressure and unbalanced pouring of the concrete are avoided.
303. The leveling and vibrating are carried out synchronously, the vibrator is adopted to vibrate and is matched with a manual shovel leveling, and the time ratio of the leveling to the vibrating is 1: and 3, adopting manual leveling near the template and the embedded instrument.
Concrete mainly adopts vibrator to vibrate and cooperates with manual shovel flat bin, and compared with vibrating time, the flat bin is roughly 1: 3, but cannot replace vibration. Manually leveling the bin at a place close to the dense place of the template and the reinforcing steel bars to ensure that the aggregates are uniformly distributed; manually feeding and filling the water stopping part; manual leveling is used around various pre-buried instruments to prevent displacement and damage.
The vibrator comprises an electric high-frequency insertion type vibrator with the diameter of 80mm and an electric flexible shaft insertion type vibrator with the diameter of 50 mm.
When the concrete is vibrated, an electric high-frequency insertion type vibrator with the diameter of 80mm is adopted, and the concrete is inserted into a bin according to a quincunx shape for vibration. The board, beam and column structure with small volume at the periphery, around the template, around the metal knot, embedded part, water stop and the like and at the upper part adopts the electric flexible shaft inserted type vibrator with diameter of 50mm to vibrate.
The control of the vibration quality is a key control link in the pouring process, considering that the steel bars near a draft tube are dense, embedded parts are more, the difficulty of concrete leveling and vibration operation at local corner parts is higher, and the situation that vibration cannot reach can occur, the same-grade primary-distribution sand-rich concrete is adopted for the control, manual feeding is carried out, and vibration, inspection holes and an attached vibrator auxiliary mode are arranged on a template for processing.
304. After concrete pouring is finished, watering and maintaining;
concrete curing mainly adopts watering maintenance, and the maintenance is started 12-18 h after concrete pouring is finished, and the maintenance time is carried out according to the requirements of supervision engineers, and the general maintenance time is not less than 14 days, and straw bags are adopted for covering when the weather sudden change occurs.
305. And (4) after the concrete meets the strength requirement specified by the specification, removing the template.
The demolition of the template needs to determine the demolition time of the template according to the actual situation and the strength requirement required by the concrete specified by the specification, so as to prevent the influence on the appearance quality of the concrete due to the advance of the template demolition.
Through the first embodiment, the second embodiment, the third embodiment and the fourth embodiment, good implementation effects are obtained for hydropower station engineering application of the constructed Gansu Bikou Bailongjiang kylin Temple, the qualification rate of one-time acceptance of template engineering is 100%, the excellent rate is 100%, the templates are flat and smooth, gaps among the plates are tight, and the appearance quality of the concrete is good after the templates are detached.
In the description herein, reference to the description of the terms "one embodiment/mode," "some embodiments/modes," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/mode or example is included in at least one embodiment/mode or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to be the same embodiment/mode or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/aspects or examples and features of the various embodiments/aspects or examples described in this specification can be combined and combined by one skilled in the art without conflicting therewith.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
It will be understood by those skilled in the art that the foregoing embodiments are merely for clarity of description and are not intended to limit the scope of the invention. It will be apparent to those skilled in the art that other variations or modifications may be made on the above invention and still be within the scope of the invention.
Claims (9)
1. A method for manufacturing and installing a draft tube runner template is characterized by comprising a manufacturing method and an installing method;
the manufacturing method comprises the following steps:
101. primary checking: analyzing a single line diagram of the draft tube elbow to obtain a data rule and verifying the data;
102. establishing a three-dimensional model: end face encryption is carried out by adopting a multi-segment line fitting curve, three views after encryption are drawn, and then a three-dimensional model is established by drawing each line to connect an arc curved surface;
103. and (4) secondary verification: analyzing a key parameter change rule of the draft tube elbow according to data provided by a single line diagram to obtain a first data result, analyzing the parameter change rule of the draft tube elbow according to a three-dimensional model to obtain a second data result, and comparing the first data result with the second data result to obtain the maximum deviation of the first data result and the second data result; if the maximum deviation is greater than the set value, modifying the three-dimensional model in the step 102 until the maximum deviation is less than the set value;
104. drawing a template drawing: performing acceptance analysis and stress calculation on the model according to the three-dimensional model, and drawing a detail processing implementation drawing;
105. template making, namely performing key point and line lofting by adopting a total station according to a detailed processing implementation drawing, performing detailed lofting according to a measurement control point and a line, and performing template making;
the installation method comprises the following steps:
201. arranging and installing control points and lines on the surface of the formed concrete, and performing supplementary encryption according to the control points and assembly requirements;
202. assembling and paving panels one by one;
203. carrying out temporary reinforcement and locking on the template, carrying out four times of verification, and carrying out integral reinforcement after the installation is determined to be correct;
204. and installing the steel bars between the formworks.
2. The method for manufacturing and installing the draft tube runner template according to claim 1, further comprising:
106. pre-assembling the templates: pre-assembling the templates after the templates are manufactured, and temporarily locking and reinforcing the templates;
107. and (4) checking for three times: checking the formed template, and revising the template drawing according to the checking condition until the design requirement is met;
108. and (4) storing the number: and (5) carrying out classification numbering on the templates, and disassembling and storing the formed templates.
3. The method for manufacturing and installing the draft tube flow channel template according to claim 1, wherein the step 203 further comprises: the whole reinforcement is carried out through the welding of the template lacing wire, and the trimming and planing are carried out on the staggered platform of the template joint, and the staggered platform is repaired to be smooth.
4. The method for manufacturing and installing the draft tube flow passage template according to claim 3, wherein the step 203 further comprises: installing a liner sleeve at a location of a formwork centerline, the liner sleeve comprising:
a first liner tube having a first end and a second end;
the first end of the first lining pipe is connected with the first end of the second lining pipe through first angle steel;
the first end of the third lining pipe is connected with the second end of the first lining pipe through a second angle steel, and the second end of the third lining pipe is connected with the second end of the second lining pipe through a third angle steel;
the first angle steel, the second angle steel and the third angle steel are detachably connected with the inner annular surface of the template.
5. The method for manufacturing and installing the draft tube runner template according to claim 4, wherein an included angle between the first lining tube and the second lining tube, an included angle between the second lining tube and the third lining tube, and an included angle between the first lining tube and the third lining tube are all 120 °.
6. The method for manufacturing and installing the draft tube runner template according to claim 5, wherein a plurality of reinforcing support tubes are arranged between the outer side surface of the first lining tube and the inner annular surface of the template, between the second lining tube and the inner annular surface of the template, and between the third lining tube and the inner annular surface of the template, and two ends of each reinforcing support tube are detachably connected with the inner pipe sleeve and the inner annular surface of the template respectively.
7. The method for manufacturing and installing the draft tube runner template according to claim 1, further comprising a concrete pouring method, and specifically comprising the following steps:
301. watering the template to moisten the template;
302. pouring concrete, and keeping concrete surfaces on two sides to uniformly rise;
303. leveling and vibrating synchronously;
304. after concrete pouring is finished, watering and maintaining;
305. and (4) after the concrete meets the strength requirement specified by the specification, removing the template.
8. The method for manufacturing and installing the draft tube flow passage template according to claim 7, wherein the specific method of the step 303 comprises: adopting a vibrator to vibrate and matching with a manual shovel holding flat bin, wherein the ratio of the time of the flat bin to the time of vibration is 1: and 3, adopting manual leveling near the template and the embedded instrument.
9. The method for manufacturing and installing the draft tube runner formwork of claim 8, wherein the vibrator comprises an electric high-frequency insertion type vibrator with a diameter of 80mm and an electric flexible shaft insertion type vibrator with a diameter of 50 mm.
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