CN108755606B - Arch dam supporting girder template structure and construction method - Google Patents
Arch dam supporting girder template structure and construction method Download PDFInfo
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- CN108755606B CN108755606B CN201810762184.3A CN201810762184A CN108755606B CN 108755606 B CN108755606 B CN 108755606B CN 201810762184 A CN201810762184 A CN 201810762184A CN 108755606 B CN108755606 B CN 108755606B
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/02—Fixed barrages
- E02B7/04—Dams across valleys
- E02B7/08—Wall dams
- E02B7/12—Arch dams
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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
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Bridges Or Land Bridges (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
Abstract
The invention discloses an arch dam supporting girder template structure and a construction method. The arch dam supporting girder template structure comprises an upstream surface template and a downstream surface template, wherein the upstream surface template is arranged on the upstream side of the downstream surface template; the upstream surface template comprises a first supporting truss, a second supporting truss, a steel template and a shaping wood template; the first supporting truss is used as a bearing bracket of the construction platform and the upstream face template, and the bottom of the first supporting truss is buried in concrete of gate piers at two sides; the downstream surface template comprises an embedded part, a support truss III and a combined prefabricated template; the embedded parts are buried in the concrete of the gate piers at the two sides, and the bottom of the third supporting truss is fixedly connected with the embedded parts. The invention solves the problem of the prior single external bracing truss mold stripping, and realizes the safe, high-quality and high-efficiency construction of the bracing girder.
Description
Technical Field
The invention relates to an arch dam supporting girder template structure and a construction method, and relates to the technical field of civil engineering, in particular to a template structure of a rear arc gate supporting girder of an arch dam bottom hole, a deep hole or a middle hole and the like.
Background
The concrete arch dam is generally built in a relatively narrow and steep valley, and a dam body is often adopted for flood discharge under the condition of lacking a river bank spillway.
At present, the most common mode of discharging flood of arch dams mainly comprises the steps of forming surface holes, middle holes, deep holes or bottom holes on dam bodies and the like. In order to meet the flood discharge control requirement, radial gates are usually arranged behind the dam to regulate water flow, and support beams are arranged to support the thrust of the radial gates. The support girder needs to bear larger water thrust, especially at the middle hole, deep hole or bottom hole, and has large section size and is often arranged in an inclined way. Therefore, the concrete construction of the arch dam girder becomes a difficult point in engineering construction.
The girder template can meet the requirements of rigidity, strength and stability, and can also meet the safe, high-quality and high-efficiency construction purposes of the arch dam. The traditional single external bracing truss template has the problems of difficult equipment arrangement, large dismantling difficulty, large potential safety hazard and the like because of factors such as overhanging of gate piers, large cross section size of girders and the like, and the like due to the fact that the equipment arrangement is difficult to dismantle by the template on the downstream side.
Disclosure of Invention
The invention aims to provide an arch dam supporting girder template structure and a construction method, and the problem of the existing single external bracing truss template removal can be solved by arranging a combined prefabricated template on the downstream side of a supporting girder, so that the safe, high-quality and high-efficiency construction of the supporting girder is realized.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
an arch dam supporting girder template structure is characterized by comprising an upstream surface template and a downstream surface template, wherein the upstream surface template is arranged on the upstream side of the downstream surface template;
the upstream surface template comprises a first support truss, a second support truss fixedly connected with the top of the first support truss, a steel template and a shaping wood template; the first supporting truss is used as a bearing bracket of a construction platform and an upstream face formwork, the bottom of the first supporting truss is buried in concrete of gate piers on two sides, the steel formwork and the shaping wood formwork are both fixed on the second supporting truss, and the shaping wood formwork is abutted to the upstream side of the lower part of the supporting girder;
the downstream surface template comprises an embedded part, a support truss III and a combined prefabricated template; the embedded parts are buried in the concrete of the gate piers at two sides, the bottom of the third supporting truss is fixedly connected with the embedded parts, and the top of the third supporting truss is abutted to the downstream side of the lower portion of the supporting girder through the prefabricated panel.
According to the embodiment of the invention, the invention can be further optimized, and the following technical scheme is formed after the optimization:
the combined prefabricated formwork comprises a prefabricated panel, an inner truss I and an inner truss II, wherein the prefabricated panel is abutted with the supporting girder, and the inner truss I and the inner truss II are arranged across the gate piers at two sides.
In order to improve stability, the first inner truss and the second inner truss are connected through a tie rod.
In order to facilitate subsequent construction, holes are formed in the shaping wood templates.
Preferably, the shaping wood template is located above the steel template.
Preferably, the cross section of the support truss III perpendicular to the length direction is an obtuse triangle, and the prefabricated panel is fixed on the longest side of the obtuse triangle.
Preferably, the cross section of the second supporting truss perpendicular to the length direction is a right triangle, and the hypotenuse of the right triangle faces to the upstream side of the lower part of the supporting girder; the shaping wood template and the supporting girder are fixed on the hypotenuse of the right triangle.
In order to facilitate construction, a construction pavement is arranged on the second support truss.
Based on the same inventive concept, the invention also provides a construction method of the arch dam supporting girder template structure, wherein the same bin surface is firstly provided with a downstream surface template, and then provided with an upstream surface template, and the construction method specifically comprises the following steps:
s1, firstly building an upstream face template, burying two ends of a first supporting truss into concrete of gate piers on two sides when concrete of a gate pier of a dam is poured to the lower part of a supporting girder, fixing the bottom end of a second supporting truss on the first supporting truss after the concrete reaches the design strength, and sequentially arranging a steel template and a shaping wood template on the built second supporting truss;
s2, setting up a downstream face template, when the concrete of the dam gate pier is poured to the lower part of the supporting girder, burying the embedded part into the concrete of the gate pier, fixing the bottom end of the supporting truss III on the embedded part after the concrete reaches the design strength, and hoisting the combined prefabricated template to the supporting truss III for fixing, thereby completing setting up of the downstream face template.
Compared with the prior art, the invention has the beneficial effects that: the invention solves the problem of the prior single external bracing truss mold stripping, and realizes the safe, high-quality and high-efficiency construction of the bracing girder.
The upstream surface template solves the problems of more concrete and hinged embedded parts on the upstream surface in the second period.
The downstream face template solves the problem of large support Liang Qingjiao, and meanwhile, the combined prefabricated template can realize rapid installation of the downstream face template, does not need to disassemble the template, and solves the problem of disassembling the downstream face.
Drawings
FIG. 1 is a schematic illustration of an elevational arrangement of one embodiment of the present invention;
FIG. 2 is a schematic plan layout of a support girder formwork according to the present invention;
FIG. 3 is a schematic view of the structure of the first inner truss according to the present invention;
FIG. 4 is a schematic view of a second inner truss structure according to the present invention;
fig. 5 is a schematic structural view of a third supporting truss according to the present invention.
In the figure:
1. a gate pier; 2. a support girder; 3. a first supporting truss; 4 tie bars; 5. a second supporting truss; 6. assembling steel templates in a scattered way; 7. shaping a wood template; 8. an embedded part; 9. a third supporting truss; 10. prefabricating a panel; 11. an inner truss I; 12. and an inner truss II.
Detailed Description
The invention will be described in detail below with reference to the drawings in connection with embodiments. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. For convenience of description, the words "upper", "lower", "left" and "right" are used hereinafter to denote only the directions corresponding to the upper, lower, left, and right directions of the drawings, and do not limit the structure.
An arch dam supporting girder template structure comprises an upstream surface template and a downstream surface template as shown in figures 1 and 2. The upstream face template consists of a first support truss 3, a second support truss 5, a loose-splice steel template 6 and a shaping wood template 7. The first supporting truss 3 serves as an upstream face template bearing support, and meanwhile a construction platform is provided for installation of the later arc-shaped gate. And the second support truss 5 is connected with the first support truss 3, so that internal force transmission is realized. The shaping wood template 6 has the function of convenient and fast perforating, and solves the problems of more concrete and hinge embedded parts on the second stage of the upstream surface and the like. The downstream face template consists of an embedded part 8, a support truss III 9 and a combined prefabricated template, wherein the combined prefabricated template consists of a prefabricated panel 10, an inner truss I11 and an inner truss II 12. The third supporting truss 9 is buried in the concrete of the gate piers 1 at the two sides, so that the problem of inclination angle of the supporting girder is solved. The combined prefabricated template can realize the rapid installation of the downstream face template, does not need to disassemble the die, and solves the difficult problem of disassembling the die of the downstream face.
As shown in fig. 3 and 4, the first inner truss 11 and the second inner truss 12 are rectangular trusses.
As shown in fig. 5, the support truss three 9 is an obtuse triangle as a whole, and the prefabricated panel 10 is fixed on the longest side of the obtuse triangle.
As shown in fig. 1, the second supporting truss 5 has a right triangle shape as a whole, and the hypotenuse of the right triangle faces the upstream side of the lower portion of the supporting girder 2; the shaping wood template 7 and the supporting girder 2 are fixed on the hypotenuse of the right triangle. In order to facilitate construction, a construction pavement is arranged on the vertical right-angle edge of the second support truss 5.
According to the concrete pouring and support hinge installation characteristics of the supporting girder, the construction difficulties of the concrete formwork erection and the formwork removal are analyzed, the arc support hinge installation and the secondary concrete pouring are considered, and the arch dam supporting girder formwork is divided into an upstream face formwork and a downstream face formwork.
During concrete construction, the arch dam supporting girder template is erected into an upper surface template and a lower surface template, and the construction is carried out according to the sequence that the same bin surface is erected by the lower surface template and the upper surface template:
1) And (3) building an upstream surface template: when the concrete of the dam gate pier 1 is poured to the lower part of the supporting girder 2, two ends of the first supporting truss frame 3 are buried in the concrete of the gate piers 1 at two sides, after the concrete reaches strength, the second supporting truss frame 5 is welded and fixed on the first supporting truss frame 3, the bottom loose-splice steel forms 6 and the upper shaping wood forms 7 are sequentially arranged on the second supporting truss frame 5, and holes are formed in the shaping wood forms 7 according to the requirements of second-stage concrete and the embedded parts of the arc gate.
2) And (3) building a downstream surface template: when the concrete of the dam gate pier 1 is poured to the lower part of the supporting girder 2, the embedded part 8 is buried in the concrete of the gate pier 1, after the concrete reaches the strength, the supporting truss III 9 is welded and fixed on the embedded part 8, and the combined prefabricated formwork is hoisted and fixed on the supporting truss III 9, so that the downstream face formwork erection is completed.
The foregoing examples are set forth in order to provide a more thorough description of the present invention, and are not intended to limit the scope of the invention, since modifications of the invention in various equivalent forms will occur to those skilled in the art upon reading the present invention, and are within the scope of the invention as defined in the appended claims.
Claims (8)
1. An arch dam supporting girder template structure is characterized by comprising an upstream surface template and a downstream surface template, wherein the upstream surface template is arranged on the upstream side of the downstream surface template;
the upstream surface template comprises a first supporting truss (3), a second supporting truss (5) fixedly connected with the top of the first supporting truss (3), a steel template (6) and a shaping wood template (7); the first supporting truss (3) is used as a bearing bracket of a construction platform and an upstream face template, the bottom of the first supporting truss (3) is buried in concrete of gate piers (1) at two sides, the steel template (6) and the shaping wood template (7) are fixed on the second supporting truss (5), and the shaping wood template (7) is abutted with the upstream side of the lower part of the supporting girder (2);
the downstream surface template comprises an embedded part (8), a support truss III (9) and a combined prefabricated template; the embedded parts (8) are embedded in the concrete of the gate piers (1) at two sides, the bottom of the support truss III (9) is fixedly connected with the embedded parts (8), and the top of the support truss III (9) is abutted with the downstream side of the lower part of the support girder (2) through the prefabricated panel (10);
the combined prefabricated formwork comprises a prefabricated panel (10) which is abutted with the supporting girder (2), an inner truss I (11) and an inner truss II (12) which are arranged across the gate piers (1) on two sides.
2. Arch dam supporting girder formwork structure according to claim 1, characterized in that the first inner truss (11) and the second inner truss (12) are connected by tie bars (4).
3. Arch dam supporting girder formwork structure according to claim 1, characterized in that holes are provided in the profiled wood formworks (7).
4. Arch dam supporting girder formwork structure according to claim 1, characterized in that the profiled wood forms (7) are located above the steel forms (6).
5. Arch dam supporting girder formwork structure according to claim 1, characterized in that the cross section of the supporting truss three (9) perpendicular to its length direction is wholly an obtuse triangle, the prefabricated panel (10) being fixed on the longest side of the obtuse triangle.
6. An arch dam supporting girder template structure according to claim 1, characterized in that the cross section of the second supporting truss (5) perpendicular to the length direction thereof is a right triangle as a whole, the hypotenuse of which faces the upstream side of the lower part of the supporting girder (2); the shaping wood template (7) and the supporting girder (2) are fixed on the hypotenuse of the right triangle.
7. An arch dam supporting girder formwork structure according to claim 1, wherein the second supporting truss (5) is provided with a construction pavement.
8. A construction method of an arch dam supporting girder template structure according to any one of claims 1 to 7, wherein a downstream template is firstly erected on the same warehouse surface, and then an upstream template is erected, and the construction method specifically comprises the following steps:
s1, building an upstream surface template, embedding two ends of a first supporting truss (3) into concrete of gate piers (1) at two sides when concrete of a gate pier (1) of a dam is poured to the lower part of a supporting girder (2), fixing the bottom end of a second supporting truss (5) on the first supporting truss (3) after the concrete reaches the design strength, and sequentially arranging a steel template (6) and a shaping wood template (7) on the built second supporting truss (5);
s2, erecting a downstream surface template, namely embedding an embedded part (8) into concrete of the gate pier (1) when the concrete of the dam gate pier (1) is poured to the lower part of the supporting girder (2), fixing the bottom end of a supporting truss III (9) on the embedded part (8) after the concrete reaches the design strength, and hoisting the combined prefabricated template to the supporting truss III (9) for fixing, so that the erection of the downstream surface template is completed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810762184.3A CN108755606B (en) | 2018-07-12 | 2018-07-12 | Arch dam supporting girder template structure and construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810762184.3A CN108755606B (en) | 2018-07-12 | 2018-07-12 | Arch dam supporting girder template structure and construction method |
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| CN108755606A CN108755606A (en) | 2018-11-06 |
| CN108755606B true CN108755606B (en) | 2023-04-25 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111335268A (en) * | 2020-04-10 | 2020-06-26 | 中国水利水电第四工程局有限公司 | Steel lining template at bottom of arc door support hinge girder for deep hole work of dam and construction method thereof |
| CN113481944B (en) * | 2021-07-26 | 2022-07-15 | 中国三峡建工(集团)有限公司 | Construction method of dam surface hole connection girder supporting structure |
| CN113653013A (en) * | 2021-07-26 | 2021-11-16 | 中国水利水电第四工程局有限公司 | Construction technology and method for high arch dam flood discharge surface hole support hinge girder |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06136945A (en) * | 1992-10-26 | 1994-05-17 | Nisso Sangyo Kk | Form timbering beam |
| US8876430B1 (en) * | 2011-05-26 | 2014-11-04 | J.F. Brennan Company, Inc. | Systems and methods for removal of trunnion pin sleeve and for supporting tainter gate during said removal |
| JP2015190185A (en) * | 2014-03-28 | 2015-11-02 | 日立造船株式会社 | gate assembly method |
| CN106812120A (en) * | 2017-03-21 | 2017-06-09 | 中国葛洲坝集团三峡建设工程有限公司 | Hydraulic self-lifting truss-like cantilever heavy type arch dam template system |
| CN206680963U (en) * | 2017-03-21 | 2017-11-28 | 中国葛洲坝集团三峡建设工程有限公司 | Truss-like heavy type dam template |
| CN108149643A (en) * | 2017-12-18 | 2018-06-12 | 中国能源建设集团广西水电工程局有限公司 | RCC double curvature arch dam is two-way adjustable to turn over rising mould plate and construction method |
-
2018
- 2018-07-12 CN CN201810762184.3A patent/CN108755606B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06136945A (en) * | 1992-10-26 | 1994-05-17 | Nisso Sangyo Kk | Form timbering beam |
| US8876430B1 (en) * | 2011-05-26 | 2014-11-04 | J.F. Brennan Company, Inc. | Systems and methods for removal of trunnion pin sleeve and for supporting tainter gate during said removal |
| JP2015190185A (en) * | 2014-03-28 | 2015-11-02 | 日立造船株式会社 | gate assembly method |
| CN106812120A (en) * | 2017-03-21 | 2017-06-09 | 中国葛洲坝集团三峡建设工程有限公司 | Hydraulic self-lifting truss-like cantilever heavy type arch dam template system |
| CN206680963U (en) * | 2017-03-21 | 2017-11-28 | 中国葛洲坝集团三峡建设工程有限公司 | Truss-like heavy type dam template |
| CN108149643A (en) * | 2017-12-18 | 2018-06-12 | 中国能源建设集团广西水电工程局有限公司 | RCC double curvature arch dam is two-way adjustable to turn over rising mould plate and construction method |
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| CN108755606A (en) | 2018-11-06 |
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