CN111535205A - Cantilever construction method for bearing partial weight of bottom plate by using corrugated steel web plate - Google Patents
Cantilever construction method for bearing partial weight of bottom plate by using corrugated steel web plate Download PDFInfo
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- CN111535205A CN111535205A CN202010376304.3A CN202010376304A CN111535205A CN 111535205 A CN111535205 A CN 111535205A CN 202010376304 A CN202010376304 A CN 202010376304A CN 111535205 A CN111535205 A CN 111535205A
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- corrugated steel
- steel web
- cradle
- bottom plate
- construction method
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
- E01D21/10—Cantilevered erection
Abstract
The invention discloses a cantilever construction method for bearing partial weight of a bottom plate by using a corrugated steel web plate, wherein a hanging basket is assembled after construction of a No. 0 block; after the corrugated steel webs of the No. 1 block piece are installed in place, supports are arranged among the corrugated steel webs; removing the anchoring of the cradle and pushing forwards, pushing a front hanging strip of the cradle to the front end of the corrugated steel web, and fixing a front supporting point of the cradle and a rear supporting point of the cradle; adjusting a top plate template and a bottom plate template, binding a top plate reinforcing steel bar and a bottom plate reinforcing steel bar, and enabling the templates at the end parts of the top plate and the bottom plate to be away from the front end of the corrugated steel web of the section; pouring concrete of the top plate and the bottom plate, and stretching the prestressed bundles after the strength requirement is met; and circulating the second step to the fifth step to realize the construction of the next section. The hanging basket is improved on the basis of the existing rhombic hanging basket. One end of a front suspension of the hanging basket part is anchored on the hanging strip clamping piece, the other end of the front suspension of the hanging basket part is anchored on a lower longitudinal beam of the hanging basket, and the corrugated steel web plate is used for bearing part of the weight of the bottom plate. The rear fulcrum of the hanging basket is anchored on the upper top plate. The length of the cantilever casting section can be increased, and the rear anchoring of the hanging basket is reduced.
Description
Technical Field
The invention relates to the technical field of corrugated steel web composite bridge construction, in particular to a cantilever construction method for bearing partial weight of a bottom plate by using a corrugated steel web.
Background
At present, the most common construction method of the corrugated steel web composite bridge is a cantilever casting method which is the same as that of a concrete box girder bridge. For the corrugated steel web composite bridge, the top plate and the bottom plate need to be poured separately, the construction working surface is few, and the construction period is long. If the construction sections are lengthened, the weight of a single section is greatly increased, and the requirement on the hanging basket is high.
The asynchronous pouring construction method developed for the corrugated steel web composite bridge is characterized in that the whole hanging basket is supported on the steel web of the current section, the corrugated steel web is completely utilized to bear the weight of the top plate and the bottom plate of the concrete, and the requirement on the web is high. Meanwhile, the problem of stress concentration of concrete at the front end of the cantilever is easy to occur. In addition, an asynchronous pouring construction method is adopted, a new independent matched construction hanging basket form needs to be developed, and the technical operation is complex.
Disclosure of Invention
In order to solve the technical problems, the invention provides a cantilever construction method for bearing part of the weight of a bottom plate by utilizing a corrugated steel web plate, which can reduce the steel consumption of a rhombic hanging basket, increase the segment division length, effectively avoid the problem of stress concentration at the front end of a cantilever caused by asynchronous pouring and improve the construction quality.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a cantilever construction method for bearing partial weight of a bottom plate by using a corrugated steel web, which comprises the following steps of:
firstly, after the construction of the No. 0 block piece is finished, hoisting and installing the corrugated steel web plate of the No. 1 block piece after the construction hanging baskets are assembled;
secondly, after the corrugated steel webs are installed in place, arranging a horizontal supporting device between every two adjacent corrugated steel webs;
thirdly, removing the anchoring of the cradle and pushing forwards, pushing a front hanging strip of the bottom die of the cradle to a position with a first distance from the front end of the corrugated steel web, fixing a front supporting point and a rear supporting point of the cradle, and enabling the front hanging strip of the bottom die of the cradle to act on the corrugated steel web through a hanging strip clamping piece;
fourthly, adjusting the top plate template and the bottom plate template, binding the top plate reinforcing steel bars and the bottom plate reinforcing steel bars, and enabling the end templates of the top plate and the bottom plate to be a second distance away from the front end of the section of the corrugated steel web plate;
fifthly, synchronously pouring concrete of the top plate and the bottom plate, and stretching the prestressed bundles after the strength requirement is met;
and sixthly, circulating the second step to the fifth step to realize the construction of the next section.
Optionally, the outer hanging strip at the front end of the bottom die of the hanging basket is fixed on the bolt between the connected corrugated steel webs through the hanging strip clamping piece.
Optionally, the hanging basket is fixed to the concrete of the previous section.
Optionally, an outer hanging strip at the front end of the bottom die of the hanging basket is fixed on the corrugated steel web, and a front supporting point of the hanging basket is fixed on the concrete of the previous section.
Optionally, the rear fulcrum of the hanging basket is anchored on the concrete of the previous section.
Optionally, the distance between the front fulcrum of the hanging basket and the concrete edge of the previous section is 1.2 m.
Optionally, the first distance is 0.5 m.
Optionally, the second distance is 0.8 m.
Compared with the prior art, the invention has the following technical effects:
(1) the construction method provided by the invention has the advantages that the corrugated steel web plate bears partial weight of the bottom plate, the bearing capacity of the corrugated steel web plate can be exerted, and the utilization efficiency of materials is improved.
(2) The construction method can increase the length of the cantilever casting section and improve the construction efficiency.
(3) The construction method can reduce the rear anchoring of the cradle, save the steel consumption, and directly improve the existing cradle without specially designing a matched cradle.
(4) The construction method provided by the invention effectively avoids the problem of stress concentration at the front end of the cantilever caused by asynchronous pouring, and improves the construction quality.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic view of a cradle structure of a cantilever construction method for bearing partial weight of a base plate by using a corrugated steel web according to the present invention;
FIG. 2 is a schematic view of a front sling fixing structure of a bottom die of a cradle in a cantilever construction method in which a corrugated steel web is used to bear part of the weight of a bottom plate;
FIG. 3 is a schematic view showing a connection structure of a lifting strip clip in the cantilever construction method of the present invention using a corrugated steel web to bear a part of the weight of a bottom plate;
FIG. 4 is a schematic structural view of a cross section of a basket in the cantilever construction method for bearing a part of the weight of a bottom plate by using a corrugated steel web according to the present invention;
FIG. 5 is a schematic view illustrating a corrugated steel web being hoisted in a cantilever construction method according to the present invention in which the corrugated steel web is used to bear a part of the weight of a base plate;
FIG. 6 is a schematic view illustrating a forward movement process of a basket in a cantilever construction method according to the present invention, in which a corrugated steel web is used to bear a part of the weight of a base plate;
FIG. 7 is a schematic view of top and bottom plates constructed in a cantilever construction method of the present invention using a corrugated steel web to bear a portion of the weight of the bottom plate;
FIG. 8 is a schematic view of a horizontal supporting device in the cantilever construction method for bearing a part of the weight of a base plate using a corrugated steel web according to the present invention;
FIG. 9 is a schematic view of another horizontal supporting device in the cantilever construction method for bearing a part of the weight of a base plate using a corrugated steel web according to the present invention;
fig. 10 is a partial view illustrating a connection structure of a supporting device in a cantilever construction method for bearing a part of the weight of a base plate using a corrugated steel web according to the present invention.
Description of reference numerals: 1. a basket hanging truss; 2. hanging a basket rear fulcrum; 3. a front fulcrum of the hanging basket; 4. a bottom die front sling; 5. a bottom die rear sling; 6. the concrete top plate of the previous section; 7. the concrete bottom plate of the previous section; 8. a top plate; 9. a base plate; 10. a sling clamping piece; 11. a basket-hanging sliding beam; 12. hanging a basket bottom longitudinal beam; 13. a construction work platform; 14. hoisting equipment; 15. a corrugated steel web; 16. a hanging strip is arranged in the front end of the bottom die; 17. an outer sling at the front end of the bottom die.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
as shown in fig. 1 to 7, the present embodiment provides a cantilever construction method for bearing a part of the weight of a base plate by using a corrugated steel web, comprising the steps of:
firstly, after the construction of the No. 0 block piece is finished, after the construction hanging baskets are assembled, hoisting and installing the corrugated steel web 15 of the No. 1 block piece;
secondly, after the corrugated steel webs 15 are installed in place, a horizontal supporting device is arranged between the adjacent corrugated steel webs 15; the horizontal supporting device is a temporary construction device, is formed by prefabricating and welding sectional materials in a factory and is welded on the inner side of the corrugated steel web after being transported to the site, so that the instability of the corrugated steel web in the construction process is prevented.
Thirdly, removing the anchoring of the cradle and pushing forwards, pushing a front hanging strip 4 of a bottom die of the cradle to a position 0.5m away from the front end of the corrugated steel web 15, and fixing a front supporting point 3 of the cradle and a rear supporting point 2 of the cradle; an outer hanging strip 17 at the front end of the bottom die of the hanging basket is fixed on a bolt between the connected corrugated steel web plates 15 through a hanging strip clamping piece 10; the front supporting point 3 of the hanging basket is anchored on the concrete of the front section. The front pivot 3 of the hanging basket is 1.2m away from the concrete edge of the previous section.
Fourthly, adjusting a top plate 8 template and a bottom plate 9 template, binding a top plate 8 reinforcing steel bar and a bottom plate 9 reinforcing steel bar, and enabling the distance between the end templates of the top plate 8 and the bottom plate 9 and the front end of the section of corrugated steel web 15 to be 0.8 m;
fifthly, synchronously pouring concrete of the top plate 8 and the bottom plate 9, and stretching the prestressed tendons after the strength requirement is met;
and sixthly, circulating the second step to the fifth step to realize the construction of the next section.
Science and technology projects of the transportation hall in Zhejiang province: 2019049.
it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (8)
1. A cantilever construction method for bearing partial weight of a bottom plate by using a corrugated steel web is characterized by comprising the following steps of:
firstly, after the construction of the No. 0 block piece is finished, hoisting and installing the corrugated steel web plate of the No. 1 block piece after the construction hanging baskets are assembled;
secondly, after the corrugated steel webs are installed in place, arranging a horizontal supporting device between every two adjacent corrugated steel webs;
thirdly, removing the anchoring of the cradle and pushing forwards, pushing a front hanging strip of the bottom die of the cradle to a position with a first distance from the front end of the corrugated steel web, fixing a front supporting point and a rear supporting point of the cradle, and enabling the front hanging strip of the bottom die of the cradle to act on the corrugated steel web through a hanging strip clamping piece;
fourthly, adjusting the top plate template and the bottom plate template, binding the top plate reinforcing steel bars and the bottom plate reinforcing steel bars, and enabling the end templates of the top plate and the bottom plate to be a second distance away from the front end of the section of the corrugated steel web plate;
fifthly, synchronously pouring concrete of the top plate and the bottom plate, and stretching the prestressed bundles after the strength requirement is met;
and sixthly, circulating the second step to the fifth step to realize the construction of the next section.
2. The cantilever construction method for bearing partial weight of a bottom plate by using a corrugated steel web plate as claimed in claim 1, wherein an outer hanging strip at the front end of the bottom die of the cradle is fixed on a bolt between the connected corrugated steel web plates by a hanging strip clamping piece.
3. The cantilever construction method using a corrugated steel web to bear part of the weight of the floor as claimed in claim 1, wherein the cradle is fixed to the concrete of the previous section.
4. The cantilever construction method for bearing partial weight of a bottom plate by using a corrugated steel web plate as claimed in claim 1, wherein an outer hanging strip at the front end of a bottom die of the cradle is fixed on the corrugated steel web plate, and the front supporting point of the cradle is fixed on the concrete of the previous section.
5. The cantilever construction method for bearing partial weight of a floor by using a corrugated steel web as claimed in claim 4, wherein the rear fulcrum of the cradle is anchored to the concrete of the previous section.
6. The cantilever construction method for bearing partial weight of a floor by using a corrugated steel web as claimed in claim 4, wherein the front fulcrum of the cradle is 1.2m away from the concrete edge of the previous section.
7. The cantilever construction method for bearing part of the weight of a floor by using a corrugated steel web as claimed in claim 1, wherein the first distance is 0.5 m.
8. The cantilever construction method for bearing part of the weight of a floor by using a corrugated steel web as claimed in claim 1, wherein the second distance is 0.8 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010376304.3A CN111535205A (en) | 2020-05-07 | 2020-05-07 | Cantilever construction method for bearing partial weight of bottom plate by using corrugated steel web plate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010376304.3A CN111535205A (en) | 2020-05-07 | 2020-05-07 | Cantilever construction method for bearing partial weight of bottom plate by using corrugated steel web plate |
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| CN111535205A true CN111535205A (en) | 2020-08-14 |
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| CN202010376304.3A Pending CN111535205A (en) | 2020-05-07 | 2020-05-07 | Cantilever construction method for bearing partial weight of bottom plate by using corrugated steel web plate |
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| JP2008031768A (en) * | 2006-07-31 | 2008-02-14 | Ps Mitsubishi Construction Co Ltd | Cantilever overhanging erection method for corrugated steel plate web box girder bridge |
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| CN110820567A (en) * | 2019-10-16 | 2020-02-21 | 广西翔路建设有限责任公司 | Bearing type hanging basket for PC box girder part with corrugated steel web plate |
| CN110820565A (en) * | 2019-10-16 | 2020-02-21 | 广西翔路建设有限责任公司 | Suspended casting method for corrugated steel web hanging basket |
| CN110820566A (en) * | 2019-10-16 | 2020-02-21 | 广西翔路建设有限责任公司 | Corrugated steel web part bearing type hanging basket suspension casting construction method |
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2020
- 2020-05-07 CN CN202010376304.3A patent/CN111535205A/en active Pending
Patent Citations (12)
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| JP2008031768A (en) * | 2006-07-31 | 2008-02-14 | Ps Mitsubishi Construction Co Ltd | Cantilever overhanging erection method for corrugated steel plate web box girder bridge |
| JP2008038449A (en) * | 2006-08-04 | 2008-02-21 | Sumitomo Mitsui Construction Co Ltd | Bridge girder constructing method |
| JP2008088782A (en) * | 2006-10-05 | 2008-04-17 | Zenitaka Corp | Cantilever overhang erection method of corrugated steel plate web bridge |
| JP2008231706A (en) * | 2007-03-19 | 2008-10-02 | Ps Mitsubishi Construction Co Ltd | Construction method for capital section for cantilever erection method for bridge |
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| CN209468695U (en) * | 2018-12-20 | 2019-10-08 | 中交二公局第三工程有限公司 | A kind of no truss overhanging type corrugated steel web cantilever bridge construction hanging frame device |
| CN110820567A (en) * | 2019-10-16 | 2020-02-21 | 广西翔路建设有限责任公司 | Bearing type hanging basket for PC box girder part with corrugated steel web plate |
| CN110820565A (en) * | 2019-10-16 | 2020-02-21 | 广西翔路建设有限责任公司 | Suspended casting method for corrugated steel web hanging basket |
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