CN101096846A - Prefabricated formwork of concrete flow passage gradual change rounded corner segment top board construction and construction process thereof - Google Patents
Prefabricated formwork of concrete flow passage gradual change rounded corner segment top board construction and construction process thereof Download PDFInfo
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- CN101096846A CN101096846A CNA200710069301XA CN200710069301A CN101096846A CN 101096846 A CN101096846 A CN 101096846A CN A200710069301X A CNA200710069301X A CN A200710069301XA CN 200710069301 A CN200710069301 A CN 200710069301A CN 101096846 A CN101096846 A CN 101096846A
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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
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Abstract
The invention discloses a prefabricated formwork of a concrete flow passage gradation rounded corner section top plate construction and construction craft, which is characterized by the following: non-changing body and size of gradation rounded corner section concrete flow passage; connecting the gradation round and straight line edge flat sequence; arranging reinforced bar on the range of the rounded corner gradation; meeting demand of force and structure; keeping contact of each section of the top plate; displaying the prefabricated formwork as reverse 'T' shape; defaulting lower flange of the prefabricated formwork; retaining rectangular section. This invention can be used to cast diffused section top plate concrete of land surface workshop tail pipe of hydraulic power station.
Description
Technical field
The present invention relates to a kind of prefab form and construction technology thereof that is used for concrete flow passage gradual change fillet segment top board construction.Be applicable to the cast of ground, power station factory building draft tube diffuser concrete roof.
Background technology
Some power station concrete flow passage spatial altitudes and span are bigger, adopt conventional bearing form job practices to build concrete roof, bearing form need use a large amount of vertical support structure, the upright workload of the frame of bearing form and braced structures is big, and because this method need treat that concrete reaches the dismountable template in design strength rear, template is long turnover period.At this situation, ground, the power station factory building draft tube diffuser concrete roof that some have been built, the method that adopts inverse-T-shaped beam prefabricated template to pour into a mould, as shown in Figure 1, the prefab form of this structure can reduce the upright workload of template frame, accelerating construction progress.But, some concrete flow passages of power station are for satisfying requirements such as current and gate installation, need to adopt gradual change fillet body (runner is faded to square by circle), as the draft tube of hydropower station diffuser, often adopt gradual change fillet body, as shown in Figure 2, the left side of number in the figure 12 is the draft tube bend loss, 12 is circular cross section, diminishes gradually since the 12 runner fillets of turning right, and 20 places have then become square hole to label.General draft tube adopts the steel liner on the left side of label 14, and the runner top board on label 14 the right adopts inverse-T-shaped beam prefabricated template construction.When runner adopts gradual change fillet body, if adopt conventional inverse-T-shaped beam prefabricated template construction, wedge angle appears in the concrete at fillet position, as shown in Figure 3, fillet part divides formation a narrow and small enclosure space behind the formwork erection simultaneously, concrete is difficult to pour into a mould closely knit, can't satisfy the requirement of runner body.
Summary of the invention
The present invention is for adapting to the construction of concrete flow passage gradual change fillet section top board, a kind of prefab form and construction technology thereof of concrete flow passage gradual change fillet segment top board construction are provided, its objective is the body, the size that do not change gradual change fillet section concrete runner, the gradual change fillet is connected with straight line is smooth-going, faulting of slab ends do not occur; Fillet gradual change scope can be arranged reinforcing bar, is integral body with prefab form and support pier connection, satisfies stressed and the structure requirement; Easy construction guarantees each position concrete compaction of top board.
The technical solution adopted in the present invention is: the prefab form of concrete flow passage gradual change fillet segment top board construction, this prefab form is inverse-T-shaped, it is characterized in that: corresponding to gradual change fillet one end, the bottom flange of described prefab form is default, only stays rectangular cross section.
The longitudinal length unification of described termination rectangular cross section is determined by being slightly larger than the greatest circle angular radius.
Bottom, described prefab form two ends pre-embedded steel slab, an end bar that removes the bottom flange stretches out suitable length from the bottom flange.
A kind of construction technology of concrete flow passage gradual change fillet section top board is characterized in that may further comprise the steps:
A) at the inboard entablature of reserving of the abutment pier of gradual change fillet one end, guarantee that the concrete side of the fillet gradual change scope of after-pouring has certain thickness, do not form wedge angle; Abutment pier cast height should exceed runner top board bottom surface, and the size that exceeds is identical with the bottom flange height that removes; Abutment pier top pre-embedded steel slab, the medial surface embedded bar;
B) the middle pier of no gradual change fillet one end, cast body are identical during with the inverse-T-shaped beam prefabricated template that adopts routine, and middle pier height is poured into runner top board bottom surface; Zhong Dun top pre-embedded steel slab;
C) prefab form being docile and obedient preface is shelved between abutment pier and the middle pier, pre-embedded steel slab and abutment pier and the pre-buried steel plate welding of middle pier end face with bottom, Prefabricated block two ends, with the horizontal reinforcement buried underground in the fillet gradual change scope and the reinforcing bar welding of stretching out from prefab form bottom flange and abutment pier level, the oblique reinforcing bar welding connection that the oblique reinforcing bar of burying underground in the fillet gradual change scope and abutment pier stretch out is integral body;
D) fillet gradual change scope template is lifted on the precast beam,, only reserves the opening that template makes progress with support pier and precast beam bottom flange smooth-going connection of straight line;
E) cast-in-situ concrete in fillet gradual change scope template makes fillet gradual change scope fill up concrete.
The invention has the beneficial effects as follows: not only can adopt inverse-T-shaped precast beam, can reduce the upright workload of template frame, accelerating construction progress, and do not change body, the size of gradual change fillet section concrete runner, the gradual change fillet is connected with straight line is smooth-going, faulting of slab ends do not occur; In fillet gradual change scope, can arrange reinforcing bar, be integral body, satisfy stressed and the structure requirement with prefab form and support pier connection; Easy construction has guaranteed each position concrete compaction of top board.
Description of drawings
Fig. 1 is the arrangement diagram of the inverse-T-shaped prefabricated molds plate-girder of the present invention.
Fig. 2 is the single line drawing of gradual change fillet draft tube of the present invention.
Fig. 3 is the installation drawing of the conventional inverse-T-shaped prefabricated molds plate-girder of background technology.
Fig. 4 is the lateral plan of single inverse-T-shaped prefab form among Fig. 1.
Fig. 5 is the front view after Fig. 4 removes an end bottom flange.
The installation drawing of the inverse-T-shaped prefabricated molds plate-girder of Fig. 6 the present invention.
Fig. 7 is partial enlarged drawing A among Fig. 6.
Fig. 8 is partial enlarged drawing B among Fig. 7.
Fig. 9 is partial enlarged drawing C among Fig. 6.
The specific embodiment
As Fig. 4, Fig. 5, shown in Figure 6, present embodiment is inverse-T-shaped at the prefab form 104 of concrete flow passage gradual change fillet segment top board construction, corresponding to flow passage gradual change fillet one end, the bottom flange 104-1 of prefab form is removed, and only stays rectangular cross section 104-2.
The longitudinal length of described prefab form 104 termination rectangular cross section 104-2, the length unification of the bottom flange of just removing is determined by being slightly larger than greatest circle angular radius (being that label is 14 gradual change fillet section among Fig. 2).And at bottom, prefab form 104 two ends pre-embedded steel slab 104-3, an end bar 104-4 who removes the bottom flange stretches out suitable length from the bottom flange level, sees Fig. 7.
The construction technology of present embodiment concrete flow passage gradual change fillet section top board may further comprise the steps:
A) as shown in Figure 7, the abutment pier 102 inboard entablatures 106 (comprising horizontal direction and vertical direction) of reserving at gradual change fillet one end guarantee that the concrete side of the fillet gradual change scope 105 of after-pouring has certain thickness, do not form wedge angle; Abutment pier 102 cast height should exceed runner top board bottom surface, and the size that exceeds is highly identical with the bottom flange 104-1 that removes; At the top of abutment pier 102 pre-embedded steel slab 102-1 (see figure 8), medial surface embedded bar 102-2.
B) as shown in Figure 9, the middle pier 103 of no gradual change fillet one end, cast body are identical during with the inverse-T-shaped beam prefabricated template that adopts routine, and middle pier height is poured into runner top board bottom surface; Zhong Dun top pre-embedded steel slab 103-1.
C) prefab form 104 being docile and obedient preface is shelved between abutment pier 102 and the middle pier 103, pre-embedded steel slab 104-3 and pre-buried steel plate 102-1 and the pre-buried steel plate 103-1 welding of middle pier 103 end faces of abutment pier 102 end faces with bottom, Prefabricated block two ends, with the reinforcing bar 102-2 welding that the horizontal reinforcement buried underground in the fillet gradual change scope 105 and reinforcing bar 104-4 that stretches out from prefab form 104 bottom flange levels and abutment pier 102 levels are stretched out, the oblique reinforcing bar welding connection that the oblique reinforcing bar of burying underground in the fillet gradual change scope 105 and abutment pier 102 stretch out is integral body.
D) fillet gradual change scope template is lifted on the precast beam, this template can adopt iron or wooden, two ends respectively with abutment pier and prefab form bottom flange smooth-going connection of straight line, the centre is 1/4 circular arc of the radius that gradually changes, this template is only reserved opening upwards, in order to fluid concrete.
E) cast-in-situ concrete in fillet gradual change scope template makes fillet gradual change scope fill up concrete.Because the gradual change fillet scope bodily form is reasonable, it is bigger that prefab form removes between the back rest of bottom flange spacing, makes things convenient for the concrete construction of fillet position, can guarantee concrete pouring quality.
Claims (4)
1, a kind of prefab form of concrete flow passage gradual change fillet segment top board construction, this prefab form (104) is inverse-T-shaped, it is characterized in that: corresponding to gradual change fillet one end, (104-1) is default in the bottom flange of described prefab form, only stays rectangular cross section (104-2).
2, the prefab form of concrete flow passage gradual change fillet segment top board construction according to claim 1 is characterized in that: the longitudinal length unification of described termination rectangular cross section (104-2) is determined by being slightly larger than the greatest circle angular radius.
3, the prefab form of concrete flow passage gradual change fillet segment top board construction according to claim 1, it is characterized in that: bottom, described prefab form (104) two ends pre-embedded steel slab (104-3), an end bar (104-4) that removes the bottom flange stretches out suitable length from the bottom flange.
4, a kind of construction technology of concrete flow passage gradual change fillet section top board is characterized in that may further comprise the steps:
A) at the inboard entablature (106) of reserving of the abutment pier (102) of gradual change fillet one end, guarantee that the concrete side of the fillet gradual change scope (105) of after-pouring has certain thickness, do not form wedge angle; Abutment pier (102) cast height should exceed runner top board bottom surface, and the size that exceeds is highly identical with the bottom flange of removing (104-1); Abutment pier (102) top pre-embedded steel slab (102-1), medial surface embedded bar (102-2);
B) the middle pier (103) of no gradual change fillet one end, cast body are identical during with the inverse-T-shaped beam prefabricated template that adopts routine, and middle pier height is poured into runner top board bottom surface; Zhong Dun top pre-embedded steel slab (103-1);
C) prefab form (104) being docile and obedient preface is shelved between abutment pier (102) He Zhongdun (103), steel plate (102-1, the 103-1) welding that the pre-embedded steel slab (104-3) of bottom, Prefabricated block two ends is pre-buried with abutment pier (102) He Zhongdun (103) end face, with reinforcing bar (102-2) welding that the horizontal reinforcement buried underground in the fillet gradual change scope (105) and reinforcing bar (104-4) that stretches out from prefab form (104) bottom flange level and abutment pier (102) level are stretched out, the oblique reinforcing bar welding connection that the oblique reinforcing bar of burying underground in the fillet gradual change scope (105) and abutment pier (102) stretch out is an integral body;
D) fillet gradual change scope template is lifted on the precast beam,, only reserves the opening that template makes progress with support pier and precast beam bottom flange smooth-going connection of straight line;
E) cast-in-situ concrete in fillet gradual change scope template makes fillet gradual change scope fill up concrete.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB200710069301XA CN100547174C (en) | 2007-06-13 | 2007-06-13 | The prefab form and the construction technology thereof of concrete flow passage gradual change fillet segment top board construction |
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| CNB200710069301XA CN100547174C (en) | 2007-06-13 | 2007-06-13 | The prefab form and the construction technology thereof of concrete flow passage gradual change fillet segment top board construction |
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| CN101096846A true CN101096846A (en) | 2008-01-02 |
| CN100547174C CN100547174C (en) | 2009-10-07 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101852017A (en) * | 2010-06-03 | 2010-10-06 | 重庆交通大学 | Pouring method of tailrace tube bifurcation concrete for hydraulic power station without bracket |
| CN108330979A (en) * | 2018-01-30 | 2018-07-27 | 中国葛洲坝集团第工程有限公司 | Navigation power key project bulb-type tubular hydro set runner concreting method |
| CN108360475A (en) * | 2018-01-30 | 2018-08-03 | 中国葛洲坝集团第工程有限公司 | Navigation ＆ Hydropower Junction Engineering bulb-type tubular hydro set runner body control device and method |
| CN108792920A (en) * | 2018-07-23 | 2018-11-13 | 国电大渡河沙坪水电建设有限公司 | Heavy stay column sets turbine draft tube fast fixing tool and method |
| CN109183741A (en) * | 2018-07-30 | 2019-01-11 | 中国水利水电第五工程局有限公司 | A kind of production of power plant building tail water runner profiled template and application method |
| CN113502790A (en) * | 2021-05-14 | 2021-10-15 | 中国电建集团贵阳勘测设计研究院有限公司 | Arrangement and installation method and structure of tail water surge shaft gate and opening and closing equipment |
| CN114045794A (en) * | 2021-11-11 | 2022-02-15 | 中国水利水电第五工程局有限公司 | Method for manufacturing and installing draft tube runner template |
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2007
- 2007-06-13 CN CNB200710069301XA patent/CN100547174C/en active Active
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101852017A (en) * | 2010-06-03 | 2010-10-06 | 重庆交通大学 | Pouring method of tailrace tube bifurcation concrete for hydraulic power station without bracket |
| CN108330979A (en) * | 2018-01-30 | 2018-07-27 | 中国葛洲坝集团第工程有限公司 | Navigation power key project bulb-type tubular hydro set runner concreting method |
| CN108360475A (en) * | 2018-01-30 | 2018-08-03 | 中国葛洲坝集团第工程有限公司 | Navigation ＆ Hydropower Junction Engineering bulb-type tubular hydro set runner body control device and method |
| CN108360475B (en) * | 2018-01-30 | 2023-12-01 | 中国葛洲坝集团第一工程有限公司 | Flow passage shape control device and method for air-armature button through-flow unit |
| CN108792920A (en) * | 2018-07-23 | 2018-11-13 | 国电大渡河沙坪水电建设有限公司 | Heavy stay column sets turbine draft tube fast fixing tool and method |
| CN108792920B (en) * | 2018-07-23 | 2023-09-08 | 国能大渡河沙坪发电有限公司 | Tool and method for quickly installing draft tube of large bulb through-flow turbine unit |
| CN109183741A (en) * | 2018-07-30 | 2019-01-11 | 中国水利水电第五工程局有限公司 | A kind of production of power plant building tail water runner profiled template and application method |
| CN113502790A (en) * | 2021-05-14 | 2021-10-15 | 中国电建集团贵阳勘测设计研究院有限公司 | Arrangement and installation method and structure of tail water surge shaft gate and opening and closing equipment |
| CN113502790B (en) * | 2021-05-14 | 2022-05-13 | 中国电建集团贵阳勘测设计研究院有限公司 | Arrangement and installation method and structure of tail water surge shaft gate and opening and closing equipment |
| CN114045794A (en) * | 2021-11-11 | 2022-02-15 | 中国水利水电第五工程局有限公司 | Method for manufacturing and installing draft tube runner template |
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| CN100547174C (en) | 2009-10-07 |
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