CN114086456A - UHPC thin-wall box girder structure of section steel stiffening framework and construction method - Google Patents
UHPC thin-wall box girder structure of section steel stiffening framework and construction method Download PDFInfo
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- CN114086456A CN114086456A CN202111292611.4A CN202111292611A CN114086456A CN 114086456 A CN114086456 A CN 114086456A CN 202111292611 A CN202111292611 A CN 202111292611A CN 114086456 A CN114086456 A CN 114086456A
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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
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
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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
- E01D19/00—Structural or constructional details of bridges
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
- E01D19/125—Grating or flooring for bridges
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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
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
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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
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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
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
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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
- E01D2101/00—Material constitution of bridges
- E01D2101/30—Metal
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Abstract
The invention discloses a UHPC thin-wall box girder structure of a section steel stiffening framework and a construction method, and relates to the technical field of bridge engineering construction. The invention provides a UHPC thin-wall box girder structure of a section steel stiffening framework and a construction method thereof, aiming at solving the problems of instability of a UHPC thin-wall box section and strength damage of a bridge structure before large deformation damage of the bridge. And accurately positioning and installing the section steel stiffening framework during binding the steel bars of the box girder body, and then pouring ultra-high performance concrete to form the section steel stiffened UHPC thin-wall box girder. The box girder of the invention utilizes the conventional processing and manufacturing combination of the section steel and the reinforcing steel bars to form the section steel stiffening framework, solves the deformation problems of instability, distortion and the like of the ultra-high performance concrete thin-wall structure through the section steel stiffening framework, and achieves the aims of reducing the integral dead weight of the box girder, simple construction method, clear structural stress and economic engineering investment.
Description
Technical Field
The invention relates to the technical field of bridge engineering construction, in particular to a UHPC thin-wall box girder structure of a section steel stiffening framework and a construction method.
Background
In recent years, the UHPC (ultra high performance concrete) technology is rapidly applied to small and medium-span municipal bridges with light load, and based on the advantage of the material of ultra high mechanical property, the UHPC bridges mostly have fine structural dimensions, and the usage of the UHPC material is well matched with the structural stress. However, the railway and highway bridges are generally large in span and heavy in load, after being constructed by adopting the UHPC material, the bridge is mostly in a thin-wall box girder structure, and a top plate, a cantilever plate and a web plate of the box girder are easy to have a local instability problem under a large compressive stress level, namely, the bridge is damaged by large deformation before the strength of the bridge structure is damaged, and the instability problem of the UHPC thin-wall box section limits that the material is difficult to be applied under the conditions of large span and heavy load of the railway and highway bridges.
Two methods are generally adopted to solve the common local instability: firstly, the problem of local instability of the bridge is solved by increasing the thickness of the box girder, however, the material consumption is inevitably increased greatly, the UHPC bridge is difficult to design into a thin-wall structure, the advantage of the ultrahigh mechanical property of the material cannot be exerted, and the economy is worse; secondly, local rigidity is improved through the stiffening rib, however, concrete stiffening rib generally arranges comparatively intensive reinforcing bar, and the construction is difficult to closely knit when pouring, and construction quality is difficult to guarantee to the template structure and the installation of stiffening rib are complicated, and whole economic nature is relatively poor.
The invention provides a UHPC thin-wall box girder structure of a section steel stiffening framework and a construction method, wherein the section steel stiffening framework formed by processing section steel and reinforcing steel bars has short manufacturing period and low engineering cost, and can improve the local rigidity of each plate of the thin-wall box girder by being arranged in a top plate, a cantilever plate and a web plate of the UHPC thin-wall box girder, thereby avoiding the large deformation damage of the structure prior to the strength damage of the structure.
Disclosure of Invention
The UHPC thin-wall box girder structure and the construction method solve the application range limitation that the UHPC box girder is only suitable for the municipal bridge with medium and small span and lighter load, expand the application range of the UHPC thin-wall box girder structure under the special conditions of large span, load and the like of the railway and high-speed highway bridge, and provide the UHPC thin-wall box girder structure of the section steel stiffening framework and the construction method.
In order to achieve the above purpose, the invention mainly provides the following technical scheme: a UHPC thin-walled box girder structure of a section steel stiffening framework comprises a UHPC thin-walled box girder; the UHPC thin-wall box girder comprises a top plate, a bottom plate and a web plate; the bottom of roof is equipped with shaped steel framework of putting more energy into.
Furthermore, the profile steel stiffening framework comprises a plurality of stiffening plates and a plurality of embedded connecting plates positioned at the bottom of the top plate; the stiffening plate is fixedly connected with the embedded connecting plate and is of an inverted T shape.
Further, the embedded connecting plates comprise longitudinal embedded connecting plates and transverse embedded connecting plates anchored on the longitudinal embedded connecting plates; the longitudinal embedded connecting plates and the transverse embedded connecting plates are distributed in a crisscross and uniform mode.
Furthermore, a plurality of series reinforcing steel bar holes which are uniformly distributed are formed in the longitudinal embedded connecting plate, and a plurality of series reinforcing steel bars are arranged at the bottoms of the series reinforcing steel bar holes which are positioned on the same horizontal line; and the longitudinal embedded connecting plates separated by the series reinforcing steel bar holes are provided with anchor increasing reinforcing steel bars.
Further, the construction method of the UHPC thin-wall box girder of the section steel stiffening framework comprises the following steps:
step 1: the section form of the UHPC thin-wall box girder of the section steel stiffening framework is selected according to the transverse arrangement form of the box girder, and the box girder can be a single box and a single chamber or a single box and multiple chambers;
step 2: after the UHPC thin-wall box girder is shaped, static calculation analysis is carried out according to the bearing load, and the minimum thickness of the top plate, the bottom plate and the web plate is determined;
and step 3: designing the structure and detail parameters of the profile steel stiffening framework, carrying out stability calculation analysis, calculating and comparing the local deformation value of the beam body after the profile steel stiffening framework is added with the engineering investment, and determining various size parameters of the stiffening plate and the pre-buried connecting plate after technical and economic comparison;
and 4, step 4: punching, cutting and lofting the steel plate to process a stiffening plate and an embedded connecting plate according to the result of the step 3, wherein a plurality of uniformly distributed series reinforcing steel bar holes are formed in the longitudinal embedded connecting plate, and a plurality of series reinforcing steel bars are arranged at the bottoms of the series reinforcing steel bar holes on the same horizontal line; the longitudinal embedded connecting plates separated by the series reinforcing steel bar holes are provided with anchor reinforcing steel bars; welding the transverse embedded connecting plate on the longitudinal embedded connecting plate;
and 5: binding box girder structural steel bars on the template, positioning and installing a UHPC thin-wall box girder section steel stiffening framework, and pouring ultrahigh-performance concrete;
step 6: after the strength of the UHPC thin-wall box girder is maintained and reaches the design age, constructing a bridge deck auxiliary facility on the top of the UHPC thin-wall box girder stiffened by the section steel and carrying out traffic operation.
Compared with the prior art, the invention has the following beneficial effects:
the invention relates to a UHPC thin-wall box girder structure of a section steel stiffening framework and a construction method, which is a UHPC thin-wall box girder of the section steel stiffening framework, improves the local rigidity of a top plate, a cantilever plate and a web plate of the UHPC thin-wall box girder through the section steel stiffening framework, avoids the parts from generating larger displacement deformation when bearing larger load, and can be applied to a railway bridge with large span and heavy load after the local deformation of each plate of the UHPC thin-wall box girder is restrained. The invention greatly improves the local rigidity and the overall rigidity of the UHPC thin-wall box girder and expands the current situation that the UHPC thin-wall box girder is only applied to medium and small span and is light in load for municipal bridges.
According to the UHPC thin-wall box girder structure of the section steel stiffening framework and the construction method, the integral longitudinal stress, namely the first system stress is borne by the UHPC thin-wall box girder, and the transverse and local stress, namely the second system stress is mainly borne by the section steel stiffening framework. The first system stress is borne by the ultra-high performance concrete material, so that the self weight of the beam body can be effectively reduced while the bridge is ensured to meet rigidity deformation. The section rigidity of the local checking and calculating plate can be greatly improved by adopting the section steel stiffening framework to bear the stress of the second system, and the deformation and the stress concentration of the section are effectively limited. The characteristics of the UHPC and steel materials can be exerted to the maximum extent after the two materials are combined through the cross section.
According to the UHPC thin-wall box girder structure of the section steel stiffening framework and the construction method, the main girder is made of the UHPC material, the section of the main girder is simple, the pouring construction is simple, and the construction quality is easy to guarantee. The stiffening structure utilizes simple processes such as a section steel cutting and punching process, reinforcing steel bar cutting and bending and the like. The whole process is mature and easy to implement, and the safety and reliability of the whole structure can be effectively guaranteed.
The foregoing is a summary of the present invention, and in order to provide a clear understanding of the technical means of the present invention and to enable the same to be carried into effect in accordance with the present specification, the following detailed description of the preferred embodiments of the present invention is provided in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a UHPC thin-wall box girder structure of a section steel stiffening framework and a construction method thereof;
FIG. 2 is a schematic structural diagram of a UHPC thin-wall box girder structure of a section steel stiffening framework and a section steel stiffening framework of a construction method of the invention;
fig. 3 is an enlarged schematic view of fig. 2.
FIG. 4 is another structural diagram of the UHPC thin-wall box girder structure of the structural steel stiffening framework and the structural steel stiffening framework of the construction method of the invention.
Description of reference numerals:
1. UHPC thin-wall box girder of the shaped steel stiffening framework; 2. a UHPC thin-walled box girder; 3. a section steel stiffening framework; 4. a top plate; 5. a base plate; 6. a web; 8. pre-burying a connection plate; 9. longitudinally pre-burying a connecting plate; 10. a stiffening plate; 11. transversely pre-burying a connecting plate; 13. connecting reinforcing steel bar holes in series; 14. adding anchor steel bars; 15. and (5) connecting reinforcing steel bars in series.
Detailed Description
To further illustrate the technical means and effects adopted by the present invention to achieve the predetermined objects, the following detailed description will be given to the detailed embodiments, structures, features and effects of the UHPC thin-walled box girder structure and the construction method of a structural steel stiffened framework according to the present invention with reference to the accompanying drawings and preferred embodiments.
As shown in FIG. 1, the UHPC thin-wall box girder 1 of the section steel stiffening framework comprises a UHPC thin-wall box girder 2; the UHPC thin-wall box girder 2 comprises a top plate 4, a bottom plate 5 and a web plate 6; and the bottom of the top plate 4 is provided with a profile steel stiffening framework 3.
The UHPC thin-wall box girder structure of the structural steel stiffening framework of the invention is characterized in that the UHPC thin-wall box girder 1 of the structural steel stiffening framework is formed into the combined structure of the invention by installing the UHPC thin-wall box girder 2 with the structural steel stiffening framework 3. The UHPC thin-wall box girder 2 is mainly formed by casting ultra-high performance concrete materials, and the mechanical performance index of the UHPC thin-wall box girder is far superior to that of common concrete. The top plate 4, bottom plate 5 and web 6 are designed to be extremely thin in thickness with respect to their span-wise dimension, and may be collectively referred to as a thin plate. The UHPC thin-wall box girder 2 bears the whole external load, and the structural steel stiffening framework 3 avoids the instability damage of a top plate and the like after improving the local rigidity of the thin plate.
As shown in fig. 2, in a UHPC thin-walled box girder structure of a structural steel stiffening framework, the structural steel stiffening framework 3 includes a plurality of stiffening plates 10 and a plurality of pre-embedded connecting plates 8 located at the bottom of a top plate 4; the stiffening plate 10 is fixedly connected with the embedded connecting plate 8 and is in an inverted T shape.
According to the UHPC thin-wall box girder structure of the section steel stiffening framework, the section steel stiffening framework 3 is formed by processing common section steel plates and comprises a stiffening plate 10 and an embedded connecting plate 8, and the embedded connecting plate 8 and the stiffening plate 10 can be welded into shapes of inverted T shapes and the like.
As shown in fig. 3, in the UHPC thin-wall box girder structure of a structural steel stiffening framework of the present invention, the embedded connection plates 8 include longitudinal embedded connection plates 9 and transverse embedded connection plates 11 anchored on the longitudinal embedded connection plates 9; the longitudinal embedded connecting plates 9 and the transverse embedded connecting plates 11 are distributed uniformly in a crisscross mode.
As shown in fig. 4, in the UHPC thin-walled box girder structure of a structural steel stiffening framework of the present invention, a plurality of uniformly distributed serial reinforcing steel bar holes 13 are formed on the longitudinal embedded connection plate 9, and a plurality of serial reinforcing steel bars 15 are arranged at the bottoms of the serial reinforcing steel bar holes 13 located on the same horizontal line; and the longitudinal embedded connecting plates 9 separated by the series reinforcing steel bar holes 13 are provided with anchor reinforcing steel bars 14.
In order to conveniently connect each pair of longitudinal embedded connecting plates into a whole, series reinforcing steel bar holes 13 with a certain interval are designed and arranged, at least 2 series reinforcing steel bars 15 are designed in each series reinforcing steel bar hole 13, the section steel reinforcing plates are positioned through the series reinforcing steel bars 15, all the required longitudinal embedded connecting plates 9 are reliably connected, the section steel reinforcing framework 3 is formed after connection, and the section steel reinforcing framework 3 is installed in the UHPC thin-wall box girder 2. And a certain number of anchor reinforcing steel bars 14 are welded on the longitudinal embedded connecting plate 9 to ensure that the poured UHPC forms reliable bond to the section steel stiffening framework 3, so that common stress is achieved. The series reinforcing bar holes 13 may be inverted T-shaped, U-shaped, etc., and the specific shape is not limited. The transverse embedded connecting plate 11 is anchored on the longitudinal embedded connecting plate 9 through welding.
The invention discloses a construction method of a UHPC thin-wall box girder structure of a section steel stiffening framework, which comprises the following steps:
step 1: the section form of the UHPC thin-wall box girder 2 of the section steel stiffening framework 3 is selected according to the transverse arrangement form of the box girder, and the section form can be a single box and a single chamber or a single box and multiple chambers.
Step 2: and after the UHPC thin-wall box girder 2 is shaped, carrying out static calculation analysis according to the bearing load, and determining the minimum thickness of the top plate 4, the bottom plate 5 and the web plate 6. The UHPC thin-wall box girder 2 is calculated according to the maximum load borne by the bridge, and the thicknesses of the top plate 4, the bottom plate 5 and the web 6 are reduced while the stress requirement is met.
And step 3: designing the structure and detail parameters of the section steel stiffening framework 3, carrying out stability calculation analysis, calculating and comparing the local deformation value of the beam body after the section steel stiffening framework 3 is additionally arranged with the engineering investment, and determining various size parameters of the stiffening plate 10 and the embedded connecting plate 8 after technical and economic comparison. And performing instability damage calculation analysis on the UHPC thin-wall box girder 2, controlling the structural size of the section steel stiffening framework 3 according to the stability safety coefficient not less than 4.0, calculating and designing the detailed structural size of the stiffening plate 10 and the embedded connecting plate 8, and drawing a design drawing of the section steel stiffening framework 3.
And 4, step 4: punching, cutting and lofting the steel plate to process the stiffening plate 10 and the embedded connecting plate 8 according to the result of the step 3, wherein a plurality of series reinforcing steel bar holes 13 which are uniformly distributed are formed in the longitudinal embedded connecting plate 9, and a plurality of series reinforcing steel bars 15 are arranged at the bottoms of the series reinforcing steel bar holes 13 which are positioned on the same horizontal line; the longitudinal embedded connecting plates 9 separated by the series reinforcing steel bar holes 13 are provided with anchor reinforcing steel bars (14); the transverse embedded connecting plate 11 is welded on the longitudinal embedded connecting plate 9;
and performing anchoring connection calculation on the UHPC thin-wall box girder 2 on the longitudinal embedded connecting plate 9, and determining the diameter, the interval and the number of the anchor-increasing reinforcing steel bars 14 so as to realize reliable connection and common stress of the section steel stiffening framework 3 and the UHPC thin-wall box girder 2 and draw a design drawing of the anchor-increasing reinforcing steel bars 14. In order to conveniently connect each pair of longitudinal embedded connecting plates into a whole, series reinforcing steel bar holes 13 are designed and arranged at certain intervals, at least 2 series reinforcing steel bars 15 are designed in each series reinforcing steel bar hole 13, all the required longitudinal embedded connecting plates 9 can be reliably connected through the series reinforcing steel bars 15, and a design drawing of the series reinforcing steel bar holes 13 is drawn, and a distribution diagram is drawn. Calculating and providing the length of a welding seam, the size of a welding leg and the like required by welding the transverse embedded connecting plate 11 and the longitudinal embedded connecting plate 9, and drawing a node welding graph of the transverse embedded connecting plate 11 and the longitudinal embedded connecting plate 9;
design drawings such as a UHPC thin-wall box girder 1 general drawing, a section steel stiffening framework 3 general drawing, a longitudinal and transverse embedded connecting plate node rough drawing, a longitudinal embedded connecting plate 9 detailed drawing and the like of the section steel stiffening framework formed by the above embodiment are submitted to a factory for processing to form the section steel stiffening framework 3.
And 5: binding box girder structural steel bars on the template, positioning and installing the UHPC thin-wall box girder 2 type steel stiffening frameworks 3, and pouring ultrahigh-performance concrete. And after the structural steel stiffening framework 3 is reliably installed, pouring a beam body of the UHPC thin-wall box beam 2, tensioning the prestressed steel beam and sealing the anchor, and after the maintenance age of the UHPC thin-wall box beam 2 reaches the design requirement, completing the construction of the beam part.
Step 6: after the strength of the UHPC thin-wall box girder 2 is maintained and reaches the design age, bridge deck auxiliary facilities are constructed on the top of the UHPC thin-wall box girder 1 stiffened by the section steel and the car is opened for operation. And constructing bridge deck auxiliary facilities such as a waterproof layer, a protective layer and the like on the top of the UHPC thin-wall box girder 1 stiffened by the section steel, and then achieving the traffic operation condition.
The UHPC thin-wall box girder 1 of the profile steel stiffening framework is designed and constructed by adopting two building materials with the advantages of profile steel and UHPC high mechanical property to build a bridge, the section size of the bridge is reduced by the UHPC high mechanical property, the local rigidity of a bridge deck is improved by stiffening the profile steel, and the two materials are combined together to bear external load and simultaneously greatly reduce the self weight of the bridge structure. The structural steel stiffening structure is low in construction difficulty, a UHPC box girder pouring technology is gradually mature, the UHPC thin-wall box 1 girder of the structural steel stiffening framework greatly improves the local rigidity and the overall rigidity of the UHPC thin-wall box girder 2, and the current situation that the UHPC thin-wall box girder 2 is only applied to medium and small-span municipal bridges with light load is expanded. The invention can be popularized and applied to railway bridges, heavy-duty municipal bridges and large-span bridges under various load conditions.
The present invention has been further described with reference to the examples, but the present invention is not limited to the above-described embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (5)
1. The utility model provides a shaped steel framework of putting more energy into UHPC thin wall case girder construction which characterized in that:
the UHPC thin-wall box girder (1) of the section steel stiffening framework comprises a UHPC thin-wall box girder (2); the UHPC thin-wall box girder (2) comprises a top plate (4), a bottom plate (5) and a web plate (6); the bottom of roof (4) is equipped with shaped steel framework (3) of putting more energy into.
2. The UHPC thin-walled box girder structure of a shaped steel stiffening framework of claim 1, which is characterized in that:
the section steel stiffening framework (3) comprises a plurality of stiffening plates (10) and a plurality of embedded connecting plates (8) positioned at the bottom of the top plate (4); the stiffening plate (10) is fixedly connected with the embedded connecting plate (8) and is in an inverted T shape.
3. The UHPC thin-walled box girder structure of a shaped steel stiffening framework of claim 2, which is characterized in that:
the embedded connecting plates (8) comprise longitudinal embedded connecting plates (9) and transverse embedded connecting plates (11) anchored on the longitudinal embedded connecting plates (9); the longitudinal embedded connecting plates (9) and the transverse embedded connecting plates (11) are uniformly distributed in a criss-cross mode.
4. The UHPC thin-walled box girder structure of a shaped steel stiffening framework of claim 3, which is characterized in that:
a plurality of series reinforcing steel bar holes (13) which are uniformly distributed are formed in the longitudinal embedded connecting plate (9), and a plurality of series reinforcing steel bars (15) are arranged at the bottoms of the series reinforcing steel bar holes (13) which are positioned on the same horizontal line; and the longitudinal embedded connecting plates (9) separated by the series reinforcing steel bar holes (13) are provided with anchor reinforcing steel bars (14).
5. A construction method of UHPC thin-wall box girder of the section steel stiffening framework according to claim 4, characterized in that: the method comprises the following steps:
step 1: the section form of the UHPC thin-wall box girder (2) of the section steel stiffening framework (3) is selected according to the transverse arrangement form of the box girder, and the section form can be a single box, a single chamber or a single box and multiple chambers;
step 2: after the UHPC thin-wall box girder (2) is shaped, static calculation analysis is carried out according to the bearing load, and the minimum thickness of the top plate (4), the bottom plate (5) and the web plate (6) is determined;
and step 3: designing the structure and detail parameters of the section steel stiffening framework (3), carrying out stability calculation analysis, calculating and comparing the local deformation value of the beam body after the section steel stiffening framework (3) is additionally arranged with the engineering investment, and determining various size parameters of the stiffening plate (10) and the embedded connecting plate (8) after technical and economic comparison;
and 4, step 4: punching, cutting and lofting the steel plate according to the result obtained in the step 3 to process a stiffening plate (10) and an embedded connecting plate (8), wherein a plurality of uniformly distributed series reinforcing steel bar holes (13) are formed in the longitudinal embedded connecting plate (9), and a plurality of series reinforcing steel bars (15) are arranged at the bottoms of the series reinforcing steel bar holes (13) on the same horizontal line; the longitudinal embedded connecting plates (9) separated by the series reinforcing steel bar holes (13) are provided with anchor reinforcing steel bars (14); the transverse embedded connecting plate (11) is welded on the longitudinal embedded connecting plate (9);
and 5: binding box girder structural steel bars on the template, positioning and installing a UHPC thin-wall box girder (2) section steel stiffening framework (3), and pouring ultra-high performance concrete;
step 6: after the strength of the UHPC thin-wall box girder (2) is maintained and reaches the design age, constructing bridge deck auxiliary facilities on the top of the UHPC thin-wall box girder (1) stiffened by the section steel and running the vehicle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111292611.4A CN114086456A (en) | 2021-11-03 | 2021-11-03 | UHPC thin-wall box girder structure of section steel stiffening framework and construction method |
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| CN202111292611.4A CN114086456A (en) | 2021-11-03 | 2021-11-03 | UHPC thin-wall box girder structure of section steel stiffening framework and construction method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106638274A (en) * | 2016-12-15 | 2017-05-10 | 湖南大学 | Unidirectional prestressed ultrahigh-performance concrete thin-walled box girder standard segment |
| CN109338866A (en) * | 2018-11-14 | 2019-02-15 | 邵旭东 | A kind of microlight-type combined beam structure and its construction method suitable for Large Span Bridges |
| CN109594461A (en) * | 2017-09-30 | 2019-04-09 | 郑州市交通规划勘察设计研究院 | A kind of assembly steel-concrete combination beam and its forming method |
| JP2020183678A (en) * | 2019-05-09 | 2020-11-12 | 鹿島建設株式会社 | Box girder construction method and construction system |
| CN112523061A (en) * | 2020-11-24 | 2021-03-19 | 广西交通设计集团有限公司 | UHPC stiffened prestressed concrete box girder bridge structure and construction process thereof |
-
2021
- 2021-11-03 CN CN202111292611.4A patent/CN114086456A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106638274A (en) * | 2016-12-15 | 2017-05-10 | 湖南大学 | Unidirectional prestressed ultrahigh-performance concrete thin-walled box girder standard segment |
| CN109594461A (en) * | 2017-09-30 | 2019-04-09 | 郑州市交通规划勘察设计研究院 | A kind of assembly steel-concrete combination beam and its forming method |
| CN109338866A (en) * | 2018-11-14 | 2019-02-15 | 邵旭东 | A kind of microlight-type combined beam structure and its construction method suitable for Large Span Bridges |
| JP2020183678A (en) * | 2019-05-09 | 2020-11-12 | 鹿島建設株式会社 | Box girder construction method and construction system |
| CN112523061A (en) * | 2020-11-24 | 2021-03-19 | 广西交通设计集团有限公司 | UHPC stiffened prestressed concrete box girder bridge structure and construction process thereof |
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