CN109881646B - Concrete buttress construction method for fixing large valve in hydroelectric engineering - Google Patents
Concrete buttress construction method for fixing large valve in hydroelectric engineering Download PDFInfo
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- CN109881646B CN109881646B CN201910168437.9A CN201910168437A CN109881646B CN 109881646 B CN109881646 B CN 109881646B CN 201910168437 A CN201910168437 A CN 201910168437A CN 109881646 B CN109881646 B CN 109881646B
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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
Abstract
The invention discloses a method for constructing a concrete buttress for fixing a large valve in hydroelectric engineering, wherein the concrete buttress comprises first-stage concrete and second-stage concrete, a buttress body is fixed on a floor through vertical steel bars, and the first-stage concrete is a main body structure of the buttress and is used for supporting during valve installation construction; the second-stage concrete is positioned at four corners of the first-stage concrete, each second-stage concrete has two side faces and a lower bottom face which are adjacent to the first-stage concrete, and the other two side faces and the upper surface are free faces, so that a larger space is provided for installing and adjusting the valve foundation bolt. The first-stage concrete provides a supporting effect for installation of the valve in the construction period, the reserved second-stage concrete provides a free surface for installation and adjustment of the valve anchor bolt, and the valve anchor bolt is large in operation space and convenient to construct; the first-stage concrete and second-stage concrete joint surface is convenient to scabble, so that the first-stage concrete and the second-stage concrete are tightly combined, and the foundation bolt can be reliably fixed in the buttress.
Description
Technical Field
The invention relates to a construction method of a concrete buttress in hydraulic and hydroelectric engineering, in particular to a construction method of a concrete buttress of a large valve of a conventional hydropower station, a pumped storage power station or a pump station.
Background
In the conventional hydropower stations or pumped storage power stations and the power plants of the pump stations, a main valve is generally arranged between a pressure pipeline and an inlet or an outlet of a volute of the unit, and the main valve is fixed by foundation bolts embedded in concrete buttresses.
The common practice is to pour the concrete buttress once and reserve bolt holes in the buttress. The method has the problems that the construction of the reserved bolt hole template is difficult; the operation is difficult when the valve anchor bolt is adjusted; the hole wall of the reserved bolt and the first-stage concrete cannot be roughened, and the backfill concrete of the reserved bolt hole is not dense.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for constructing a concrete buttress for fixing a large valve in hydroelectric engineering, and effectively solving a series of problems existing in reserved bolt holes.
In order to solve the technical problems, the invention adopts the technical scheme that: a method for constructing a concrete buttress for fixing a large valve in hydroelectric engineering comprises the following steps:
(1) binding vertical steel bars and circumferential steel bars of the concrete buttress according to the design size and the integral structure of the concrete buttress, wherein the vertical steel bars are anchored in the floor of a factory building;
(2) pouring first-stage concrete at other parts except four corners of the concrete buttress corresponding to the valve foundation bolt;
(3) and after the first-stage concrete of the buttress reaches the strength required by the design, roughening the first-stage concrete at four corners of the concrete buttress, installing a valve, adjusting and fixing foundation bolts, and then pouring the second-stage concrete of the concrete buttress by using a vertical mold.
In the step (3), two side surfaces and a lower bottom surface of each second-stage concrete of the second-stage concrete buttress are in contact with the first-stage concrete, and the other side surfaces and the upper surface are free surfaces.
The distance between two side surfaces of the first-stage concrete corner and the outer wall of the foundation bolt and the distance between the edge of the outer vertical surface of the second-stage concrete and the outer wall of the foundation bolt are both more than 10cm, and the distance between the lower bottom surface of the second-stage concrete and the bottom of the foundation bolt is more than 10 cm.
The invention has the beneficial effects that: the reserved second-stage concrete provides a free surface for installing and adjusting the valve anchor bolt, the operation space is large, and the construction is convenient; the first-stage concrete and second-stage concrete joint surface is convenient to scabble, so that the first-stage concrete and the second-stage concrete are tightly combined, and the foundation bolt can be reliably fixed in the buttress. The support device can be widely applied to engineering projects such as support and fixation of the main valve in a power station plant of the hydraulic and hydroelectric engineering.
Drawings
FIG. 1 is a flow chart of a construction method of a concrete buttress for fixing a large-sized valve in hydroelectric engineering.
Fig. 2 is a plan view of a concrete buttress constructed by the method of the present invention.
Fig. 3 is a cross-sectional view of a concrete pier constructed by the method of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in figure 1, the method for constructing the concrete buttress for fixing the large valve in the hydroelectric engineering comprises the following steps:
(1) binding vertical steel bars and circumferential steel bars of the concrete buttress according to the design size and the integral structure of the concrete buttress, wherein the vertical steel bars are anchored in the floor of a factory building;
(2) pouring first-stage concrete at other parts except four corners of the concrete buttress corresponding to the valve foundation bolt;
(3) and after the first-stage concrete of the buttress reaches the strength required by the design, roughening the first-stage concrete at four corners of the concrete buttress, installing a valve, adjusting and fixing foundation bolts, and then pouring the second-stage concrete of the concrete buttress by using a vertical mold.
In the step (3), two side surfaces and a lower bottom surface of each second-stage concrete of the second-stage concrete buttress are in contact with the first-stage concrete, and the other side surfaces and the upper surface are free surfaces.
The distance between two side surfaces of the first-stage concrete corner and the outer wall of the foundation bolt and the distance between the edge of the outer vertical surface of the second-stage concrete and the outer wall of the foundation bolt are both more than 10cm, and the distance between the lower bottom surface of the second-stage concrete and the bottom of the foundation bolt is more than 10 cm.
Specifically, the concrete buttress structure constructed by the method comprises first-stage concrete and second-stage concrete. The concrete buttress is fixed on the bottom plate through the vertical steel bar. The vertical steel bars and the circumferential steel bars of the concrete buttress are not continuously disconnected when passing through the first-stage concrete and the second-stage concrete of the buttress. The first stage concrete is the main structure of the buttress, is poured firstly and is used for supporting during valve installation construction. The concrete shape and size of the concave shape in the middle of the first stage concrete of the buttress are determined according to the requirements of valve manufacturers, and the invention is not limited. The second-stage concrete is positioned at four corners of the first-stage concrete. Two side surfaces and the lower bottom surface of the second-stage concrete are in contact with the first-stage concrete, and the other two side surfaces and the upper surface of the second-stage concrete are empty. The size of the second stage concrete is determined by combining the position and the size of the foundation bolt of a valve manufacturer, and the invention is not limited. The external expansion size of the second-stage concrete on the foundation bolt base at least meets the requirement of a concrete protective layer. And adjusting the position of the valve accurately, and pouring second-stage concrete after the foundation bolts are fixed. Before the second-stage concrete is poured, the contact surface of the first-stage concrete and the second-stage concrete needs to be roughened.
The construction method has the advantages of simple structure, convenient construction, large installation and adjustment space of the valve anchor bolt, convenient operation and safe and reliable bolt installation.
The following further explains a certain diversion project water outlet working ball valve buttress adopting the technical scheme of the invention by taking the following example in combination with the attached drawings:
as shown in figures 2 and 3, in a large yellow-leading project, a water outlet working ball valve is arranged between a volute outlet of a pumping station factory building and a water outlet pressure pipeline, the diameter of the ball valve is 1200mm, and the ball valve buttress adopts the concrete buttress construction method. The plane size of the buttress body is 1900mm multiplied by 1320mm (length multiplied by width), and the height is 1990 mm; the buttress body is fixed with a water outlet side bottom plate 3 of a pumping station factory building through a vertical steel bar; the second-stage concrete 2 of the buttress is 4 blocks in total, the plane size is 500mm multiplied by 535mm, and the height is 1550mm according to the length of the foundation bolt 4; the foundation bolt 4 is convenient to install and adjust, and the foundation bolt of the valve is safely and reliably fixed in the foundation pier.
The above-described embodiments are only for illustrating the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement them without inventive efforts. The scope of the present invention should not be limited by the examples, but should be defined only by the following claims and their equivalents.
Claims (3)
1. A method for constructing a concrete buttress for fixing a large valve in hydroelectric engineering is characterized by comprising the following steps:
(1) binding vertical steel bars and circumferential steel bars of the concrete buttress according to the design size and the integral structure of the concrete buttress, wherein the vertical steel bars are anchored in the floor of a factory building;
(2) pouring first-stage concrete at other parts except four corners of the concrete buttress corresponding to the valve foundation bolt;
(3) and after the first-stage concrete of the buttress reaches the strength required by the design, roughening the first-stage concrete at four corners of the concrete buttress, installing a valve, adjusting and fixing foundation bolts, and then pouring the second-stage concrete of the concrete buttress by using a vertical mold.
2. The method for constructing the concrete buttress for fixing the large-sized valve in the hydroelectric engineering as claimed in claim 1, wherein in the step (3), the second-stage concrete of the concrete buttress contacts the first-stage concrete at two side surfaces and the lower bottom surface of each second-stage concrete, and the other side surfaces and the upper surface are free surfaces.
3. The method for constructing the concrete buttress for fixing the large-sized valve in the hydroelectric engineering as claimed in claim 2, wherein the distance between two side surfaces of the first-stage concrete corner and the outer wall of the foundation bolt and the distance between the edge of the outer vertical surface of the second-stage concrete and the outer wall of the foundation bolt are both more than 10cm, and the distance between the lower bottom surface of the second-stage concrete and the bottom of the foundation bolt is more than 10 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910168437.9A CN109881646B (en) | 2019-03-06 | 2019-03-06 | Concrete buttress construction method for fixing large valve in hydroelectric engineering |
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| CN201910168437.9A CN109881646B (en) | 2019-03-06 | 2019-03-06 | Concrete buttress construction method for fixing large valve in hydroelectric engineering |
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| CN109881646A CN109881646A (en) | 2019-06-14 |
| CN109881646B true CN109881646B (en) | 2021-03-02 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2006118152A (en) * | 2004-10-20 | 2006-05-11 | Shinayamagumi:Kk | Method for constructing circular closed conduit by open excavation system |
| CN203452056U (en) * | 2013-08-23 | 2014-02-26 | 中国水电顾问集团贵阳勘测设计研究院 | Diversion tunnel gate lifting device |
| CN103912007B (en) * | 2014-03-14 | 2016-05-25 | 中国电建集团西北勘测设计研究院有限公司 | The installation method of the precast concrete cushion cap of reserved basic annular distance and stake nest annular distance and the many pile foundations of assembled based on this cushion cap |
| CN104099907B (en) * | 2014-07-17 | 2016-01-27 | 黄河勘测规划设计有限公司 | The construction method that arc door pull bar props up free bearing worn by the fan-shaped reinforcing bar of gate pier |
| CN107700438B (en) * | 2017-10-11 | 2023-04-07 | 山东省水利勘测设计院有限公司 | Assembled steel pipe concrete radial gate support gate pier structure |
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