CN113215949A - Prefabricated assembled UHPC-corrugated steel web plate combined box girder bridge and construction method - Google Patents
Prefabricated assembled UHPC-corrugated steel web plate combined box girder bridge and construction method Download PDFInfo
- Publication number
- CN113215949A CN113215949A CN202110244776.8A CN202110244776A CN113215949A CN 113215949 A CN113215949 A CN 113215949A CN 202110244776 A CN202110244776 A CN 202110244776A CN 113215949 A CN113215949 A CN 113215949A
- Authority
- CN
- China
- Prior art keywords
- uhpc
- corrugated steel
- steel web
- box girder
- plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 175
- 239000010959 steel Substances 0.000 title claims abstract description 175
- 238000010276 construction Methods 0.000 title claims abstract description 43
- 239000011374 ultra-high-performance concrete Substances 0.000 claims abstract description 150
- 239000002131 composite material Substances 0.000 claims description 11
- 239000004567 concrete Substances 0.000 claims description 11
- 239000011148 porous material Substances 0.000 claims description 11
- 238000001727 in vivo Methods 0.000 claims description 6
- 239000000725 suspension Substances 0.000 claims description 5
- 238000005192 partition Methods 0.000 claims description 3
- 238000005336 cracking Methods 0.000 abstract description 12
- 239000000463 material Substances 0.000 description 8
- 239000011513 prestressed concrete Substances 0.000 description 7
- 238000000338 in vitro Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
Images
Classifications
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention belongs to the technical field of civil engineering, and relates to a prefabricated assembled UHPC-corrugated steel web plate combined box girder bridge and a construction method thereof; comprises a pier and a UHPC-corrugated steel web plate combined box girder which is arranged on the pier and connected with the pier; the combined box girder is formed by sequentially splicing a plurality of UHPC-corrugated steel web plate combined box girder segments; the segments comprise UHPC top plates, UHPC bottom plates, corrugated steel webs and UHPC transverse clapboards; the UHPC top plate and the UHPC bottom plate are axially arranged in parallel; the corrugated steel web plate is arranged at the position of the web plate; the UHPC transverse clapboard is vertically arranged between the UHPC top plate and the UHPC bottom plate and is contacted with the corrugated steel web plate; the UHPC bottom plate is connected with the bridge pier. The invention has simple structural design, obviously reduces the dead weight of the box girder bridge and greatly improves the main span of the bridge; the cracking risk is obviously reduced, and the structural durability is improved; the construction is convenient, and the field construction period is greatly shortened.
Description
Technical Field
The invention belongs to the technical field of civil engineering, and particularly relates to a prefabricated assembled UHPC-corrugated steel web plate combined box girder bridge and a construction method.
Background
The large-span prestressed concrete box girder bridge is a mainstream bridge type within the range of 200m of the main span at present due to the characteristics of good structural performance, simple and convenient construction, low later maintenance cost and the like. However, the phenomena of excessive downwarping of the main span and cracking of the girder body of the large-span prestressed concrete box girder bridge are very common, which become the persistent symptoms of the bridge type and seriously threaten the safe operation and durability of the structure, so far, the phenomena can not be effectively solved.
In order to solve the problem of web cracking of a large-span prestressed concrete box girder bridge, early researchers replace a concrete web with a corrugated steel plate, and provide a corrugated steel web combined box girder bridge; compared with a large-span prestressed concrete box girder bridge, the structure has the advantages of light dead weight, complete avoidance of web cracking, high prestressed introduction efficiency and the like. However, the top and bottom plates of the bridge are still cast by common concrete materials with low tensile strength, so that the large tensile stress generated under the action of various complex factors inside and outside the large-span structure is difficult to resist, cracking is easy to occur, and the structural durability is reduced. Therefore, the top and bottom plates of the corrugated steel web composite box girder bridge become bottlenecks which limit further popularization and application. The development of a large-span corrugated steel web combined box girder bridge to a larger span, higher strength and better durability necessarily requires that the bridge breaks through on a top plate and a bottom plate.
With the development of material science and technology, the ultra-high performance concrete can be applied to civil engineering construction, the structural adoption of the ultra-high performance concrete can greatly reduce the geometric dimension of a member, reduce the dead weight of a structure, improve the effectiveness of the structure in resisting use load and increase the spanning capacity of a bridge structure, and creep deformation is very small after steam curing. Therefore, introducing the ultra-high performance concrete material into the corrugated steel web combined box girder bridge top and bottom plate is an effective way for improving the main span of the bridge, reducing the cracking risk of the top and bottom plate, reducing the creep deformation of the structure and improving the durability of the structure.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a prefabricated assembled UHPC-corrugated steel web plate combined box girder bridge and a construction method thereof, wherein the combined box girder bridge has simple structural design, the dead weight of the box girder bridge is obviously reduced, and the main span of the bridge is greatly improved; the cracking risk is obviously reduced, and the structural durability is improved; the construction is convenient, and the field construction period is greatly shortened.
In order to achieve the purpose, the invention adopts the technical scheme that:
a prefabricated assembled UHPC-corrugated steel web plate combined box girder bridge comprises a bridge pier and a UHPC-corrugated steel web plate combined box girder which is arranged on the bridge pier and connected with the bridge pier; the UHPC-corrugated steel web plate combined box girder is formed by sequentially assembling a plurality of UHPC-corrugated steel web plate combined box girder segments;
the UHPC-corrugated steel web plate combined box girder segment comprises an UHPC top plate, an UHPC bottom plate, a corrugated steel web plate and an UHPC diaphragm plate; the UHPC top plate and the UHPC bottom plate are axially arranged in parallel; the corrugated steel web plate is arranged at the web plate position between the UHPC top plate and the UHPC bottom plate; the UHPC transverse clapboard is vertically arranged between the UHPC top plate and the UHPC bottom plate and is contacted with the corrugated steel web plate; the end face of the UHPC top plate and the end face of the UHPC bottom plate are respectively provided with a shear key; and the UHPC bottom plate is connected with a pier.
Further, the thickness of the UHPC top plate is 0.15-0.30 m; the thickness of the UHPC bottom plate is 0.15-1.50 m; the thickness of the UHPC transverse partition plate is 0.12-0.20 m; the thickness of the corrugated steel web is 12 mm-30 mm.
Further, the shear key is a spline-type shear key.
Furthermore, in-vivo prestressed steel strand ducts are respectively arranged in the UHPC top plate and the UHPC bottom plate; and the internal prestressed steel beam pore channel respectively penetrates through the axial direction of the UHPC top plate and the axial direction of the UHPC bottom plate.
Furthermore, the UHPC diaphragm plates are multiple and distributed at intervals of 3.5-4 m.
Furthermore, an external prestressed steel beam pore is arranged on the UHPC diaphragm plate; the axial direction of the external prestressed steel beam pore is parallel to the axial direction of the corrugated steel web.
Further, the length of the UHPC-corrugated steel web composite box girder segment is 4.8m or 6.4 m.
A construction method of a prefabricated assembled UHPC-corrugated steel web combined box girder bridge comprises the following steps:
1) completing the construction of a pile foundation and a pier, and prefabricating a plurality of UHPC-corrugated steel web plate combined box girder segments according to the designed length of the bridge;
2) constructing a zero block on the main pier of the bridge and tensioning a prestressed bundle;
3) according to the sequence of segment suspension splicing and prestressed steel beam tensioning, a plurality of UHPC-corrugated steel web plate combined box girder segments which are prefabricated are symmetrically cantilever-spliced on two sides of a zero block on a main pier;
4) constructing, finishing side span closure, and tensioning side span prestressed steel bundles;
5) further completing mid-span folding, and tensioning the prestressed steel beam in the full-bridge span;
6) and (5) completing the auxiliary engineering and the bridge deck pavement, and completing the bridge construction.
Further, in the step 3), when the zero-number block and the UHPC-corrugated steel web combined box girder segment are spliced, an inner lining concrete layer with the thickness of 0.15-0.30 m is arranged on the corrugated steel web in the area of 15-25 m at the two ends of the zero-number block.
Further, in the step 3), when a plurality of UHPC-corrugated steel web plate combined box girder segments are spliced, the UHPC top plates and the UHPC bottom plates are connected through shear force keys, and the corrugated steel webs are connected through bolts and fillet welding.
The invention has the beneficial effects that:
1. the prefabricated assembled UHPC-corrugated steel web combined box girder bridge provided by the invention has the advantages that the structural design is simple, the stress characteristics are clear, the utilization rate of materials of the UHPC-corrugated steel web combined box girder is high, the self weight of the box girder bridge can be obviously reduced, and the main span of the bridge is greatly improved; the bridge is made of UHPC materials, so that the strength is high, the durability is good, the later-period shrinkage rate is reduced, and the problems of excessive downwarping and beam body cracking in the span of the traditional prestressed concrete beam bridge are comprehensively solved; the corrugated steel web is adopted as the web, so that the problems of web cracking and buckling are avoided, the prestress introduction efficiency is higher, and the advantages of a longitudinal unidirectional prestress system are better highlighted.
2. The construction of the section prefabricated assembled UHPC-corrugated steel web combined box girder bridge provided by the invention can adopt factory prefabricated box girder sections and assemble on site, thus ensuring the quality of the bridge, greatly shortening the construction period on site and being very suitable for the design and construction of long-span continuous girders and continuous steel bridges.
3. According to the invention, a plurality of UHPC-corrugated steel web plate combined box girder segments are spliced on site, UHPC top plates and UHPC bottom plates are connected through shear force keys, corrugated steel web plates are connected through bolts and fillet welding, the vertical shear force bearing mode of the cross section of the finished bridge is changed from full-section bearing shear of an integral cast-in-place girder into joint bearing shear of friction force between the UHPC top plates and the UHPC bottom plates, a tooth key type shear force key and the corrugated steel web plates, the connection is reliable, the damage of a main girder caused by seam failure is avoided, and the integral cast-in-place girder is essentially different from the integral cast-in-place girder.
Drawings
Fig. 1 is a front view of a continuous box girder bridge according to embodiment 1 of the present invention (wherein a prestressed steel strand 3 is only a structural representation);
FIG. 2 is a cross-sectional view taken at A-A of FIG. 1;
FIG. 3 is an enlarged cross-sectional view taken along line B-B of FIG. 1;
FIG. 4 is an enlarged cross-sectional view taken at C-C of FIG. 1;
fig. 5 is a front view of a continuous box girder bridge according to embodiment 2 of the present invention (wherein the prestressed steel bundles 3 are only shown in a structural view);
FIG. 6 is a cross-sectional view taken at D-D of FIG. 5;
FIG. 7 is an enlarged cross-sectional view taken at E-E in FIG. 5;
FIG. 8 is an enlarged cross-sectional view taken at F-F of FIG. 5;
FIG. 9 is a schematic view of a section of a UHPC-corrugated steel web composite box beam of the present invention;
FIG. 10 is a schematic view of a corrugated steel web connection of a UHPC-corrugated steel web composite box beam of the present invention;
FIG. 11 is a schematic view of the connection of corrugated steel web plates and lining concrete of the UHPC-corrugated steel web plate combination box girder of the invention;
FIG. 12 is a schematic view of a shear key of the present invention;
in the figure:
1-bridge pier; 2-UHPC-corrugated steel web composite box girder segment; 21-UHPC top plate; 22-UHPC backplane; 23-corrugated steel web; 24-UHPC diaphragm; 25-prestressed steel beam pore in vivo; 26-external prestress steel beam pore channel; 27-lining concrete layer; 28-top and bottom shear key; 3, prestressed steel bundles; 4, a bolt; and 5, fillet welding.
Detailed Description
The present invention will now be described in detail with reference to the accompanying drawings and examples.
Example 1
Referring to fig. 1 to 4, in the prefabricated assembled UHPC-corrugated steel web composite box girder bridge provided by this embodiment, the span of the continuous box girder bridge is 300m +450m +300m, and a continuous steel bridge type design is adopted.
The continuous box girder bridge provided by the embodiment comprises a pier 1 and a UHPC-corrugated steel web combined box girder, wherein the UHPC-corrugated steel web combined box girder adopts an in-vitro and in-vivo combined mode prestress system in the longitudinal direction of the bridge.
The prefabricated assembled UHPC-corrugated steel web combined box girder bridge provided by the embodiment comprises a pier 1 and the UHPC-corrugated steel web combined box girder which is arranged on the pier 1 and is connected with the pier 1; the UHPC-corrugated steel web plate combined box girder is formed by sequentially assembling a plurality of UHPC-corrugated steel web plate combined box girder segments 2; the UHPC-corrugated steel web combined box girder segment 2 comprises a UHPC top plate 21, a UHPC bottom plate 22, a corrugated steel web 23 and a UHPC diaphragm plate 24; the UHPC top plate 21 and the UHPC bottom plate 22 are axially arranged in parallel; a corrugated steel web 23 is placed at the web position between the UHPC top plate 21 and the UHPC bottom plate 22; the UHPC diaphragm plate 24 is vertical to the space between the UHPC top plate 21 and the UHPC bottom plate 22 and is contacted with the corrugated steel web plate 23; the UHPC bottom plate 22 is connected with the pier 1; and shear keys 28 are respectively arranged on the end surface of the UHPC top plate 21 and the end surface of the UHPC bottom plate 22.
In this embodiment, the UHPC top plate 21 is a horizontal plate, and the UHPC bottom plate 22 is a plate whose structure changes along a quadratic curve.
In the embodiment, the UHPC is ultra-high performance concrete, the compressive strength of the concrete is more than 150MPa, and the flexural strength is more than 20 MPa; the strength is high, the durability is good, the later-stage shrinkage is small, and the problems of excessive downwarping and beam body cracking in the span of the traditional prestressed concrete beam bridge are comprehensively solved.
In this embodiment, two corrugated steel webs 23 are respectively disposed between the UHPC top plate 21 and the UHPC bottom plate 22 in parallel, the corrugated steel webs 23 are axially perpendicular to the UHPC top plate 21, the UHPC diaphragm 24 is perpendicular to the UHPC top plate 21 and the UHPC bottom plate 22, and two opposite side walls of the UHPC diaphragm 24 are respectively in corresponding contact with the two corrugated steel webs 23.
In this embodiment, the corrugated steel web 23 is made of low-alloy high-strength structural steel. The material characteristic of the steel material can avoid cracking, the corrugated steel web plate adopts a corrugated form, the buckling problem can be avoided due to the structural form, the prestress leading-in efficiency is higher, and the advantages of a longitudinal unidirectional prestress system are better highlighted.
In the embodiment, the UHPC-corrugated steel web composite box girder segment 2 is divided into a plurality of segments according to the bridge length, and the length of each segment is set to be 6.4m according to actual construction requirements.
In the embodiment, the thickness of the UHPC top plate 21 is 0.20m, the thickness of the UHPC bottom plate 22 is 0.20 m-1.30 m, wherein the thickness of the UHPC bottom plate 22 at the midspan section is 0.20m, the thickness of the UHPC bottom plate 22 at the pier top fulcrum section is 1.30m, and the thickness of the UHPC bottom plate between the midspan section and the pier top fulcrum section is in a gradual change mode; the thickness of the corrugated steel web 23 at the midspan section is 12mm, the thickness of the corrugated steel web 23 at the pier top fulcrum section is 30mm, and the thickness of the corrugated steel web 23 between the midspan section and the pier top fulcrum section is in a gradual change mode; the UHPC diaphragm 24 has a thickness of 0.16 m.
Referring to fig. 9 and 12, in the present embodiment, the shear keys 28 are uniformly distributed on the end surface of the UHPC top plate 21 and the end surface of the UHPC bottom plate 22, respectively, and the shear keys 28 are spline-type shear keys.
In this embodiment, the UHPC diaphragms 24 are arranged densely, and the UHPC diaphragms 24 are arranged at intervals of 3.5m in the longitudinal direction. The UHPC diaphragm 24 is primarily used for in vitro prestressed steering.
In this embodiment, a plurality of internal prestressed steel beam ducts 25 are respectively arranged in the UHPC top plate 21 and the UHPC bottom plate 22; the multiple internal prestressed steel strand pore channels 25 are parallel to each other, and the multiple internal prestressed steel strand pore channels 25 penetrate through the UHPC top plate 21 in the axial direction; the plurality of internal prestressed steel strand ducts 25 penetrate through the UHPC bottom plate 22 in the axial direction.
In this embodiment, the UHPC diaphragm 24 is provided with an external prestressed steel bundle channel 26, and the axial direction of the external prestressed steel bundle channel 26 is parallel to the axial direction of the corrugated steel web 23.
The construction method of the prefabricated assembled UHPC-corrugated steel web combined box girder bridge provided by the embodiment comprises the following steps:
1) completing the construction of a pile foundation and a pier 1, and prefabricating a plurality of UHPC-corrugated steel web plate combined box girder segments according to the designed length of the bridge;
2) constructing a zero block on the main pier of the bridge and tensioning a prestressed bundle;
3) according to the sequence of segment suspension splicing and prestressed steel beam 3 tensioning, a plurality of UHPC-corrugated steel web plate combined box girder segments which are prefabricated are symmetrically cantilever-spliced on two sides of a zero block on a main pier;
4) after construction, side span closure is completed, and side span prestress steel bundles 3 are tensioned;
5) further completing mid-span folding, and tensioning a prestressed steel beam 3 in the full-bridge span;
6) and (5) completing the auxiliary engineering and the bridge deck pavement, and completing the bridge construction.
Referring to fig. 11, in step 3), when the zero-number block is spliced with the UHPC-corrugated steel web composite box girder segment, an inner lining concrete layer 27 with the thickness of 0.20 is arranged on the corrugated steel web 23 in the area of 18m at the two ends of the zero-number block.
Referring to fig. 9 and 10, in step 3), when a plurality of UHPC-corrugated steel web plate combined box girder segments are spliced, the UHPC top plates 21 and the UHPC bottom plates 22 are connected through shear keys 28, and the corrugated steel webs are connected through bolts 4 and fillet welds 5. The bridge-forming rear section vertical shear force bearing mode is changed from full-section bearing shear of the integral cast-in-place beam to common bearing shear of friction force between the UHPC top and bottom plates, the toothed key type shear force key and the corrugated steel web plate, the connection is reliable, and the bridge-forming rear section vertical shear force bearing mode is essentially different from the integral cast-in-place beam.
Because, cast-in-place beams are also referred to as continuous beams; and the structure of the segment precast beam is discontinuous at the joint, and the joint is mainly spliced through different forms (dry joint, glue joint and the like). Load-displacement curves of the cast-in-place beam and the segmental precast beam at the initial loading stage are generally in a linear relationship, and the cast-in-place beam and the segmental precast beam enter a nonlinear stage at the later stage with the increase of load, except that the segmental precast beam is formed by assembling a plurality of segmental beams, joints are continuously opened with the increase of load, the load-displacement curve of the main beam has an obvious nonlinear relationship, the rigidity of the beam body is obviously reduced, and the rigidity is obviously reduced when the number of the joints is more; even the main beam is damaged due to the fact that the shearing force key at the joint is damaged, the nonlinear evolution and the rigidity reduction amplitude of the main beam are more obvious than those of the integral cast-in-place beam, the final damage mode and the crack distribution form are also obviously different from those of the integral beam, and the stress characteristic and the damage mode of the segmental precast beam are obviously different from those of the integral beam. Therefore, the bridge and the construction method provided by the invention have reliable connection and avoid the damage of the main beam caused by the failure of the joint.
Example 2
Referring to fig. 5 to 8, in the prefabricated assembled UHPC-corrugated steel web composite box girder bridge provided by this embodiment, the span of the continuous box girder bridge is 270m +400m +270m, and a continuous bridge type design is adopted.
The continuous box girder bridge comprises a pier 1 and a UHPC-corrugated steel web plate combined box girder, wherein the UHPC-corrugated steel web plate combined box girder adopts an in-vitro and in-vivo combined mode prestress system in the longitudinal direction of the bridge.
The prefabricated assembled UHPC-corrugated steel web combined box girder bridge provided by the embodiment comprises a pier 1 and the UHPC-corrugated steel web combined box girder which is arranged on the pier 1 and is connected with the pier 1; the UHPC-corrugated steel web plate combined box girder is formed by sequentially assembling a plurality of UHPC-corrugated steel web plate combined box girder segments 2; the UHPC-corrugated steel web combined box girder segment 2 comprises a UHPC top plate 21, a UHPC bottom plate 22, a corrugated steel web 23 and a UHPC diaphragm plate 24; the UHPC top plate 21 and the UHPC bottom plate 22 are axially arranged in parallel; a corrugated steel web 23 is placed at the web position between the UHPC top plate 21 and the UHPC bottom plate 22; the UHPC diaphragm plate 24 is vertical to the space between the UHPC top plate 21 and the UHPC bottom plate 22 and is contacted with the corrugated steel web plate 23; the UHPC bottom plate 22 is connected with the pier 1; the UHPC top plate 21 and the UHPC bottom plate 22 are respectively provided with a shear key 28.
In this embodiment, there is a support between the UHPC base plate 22 and the pier.
In the embodiment, the UHPC-corrugated steel web combined box girder is divided into a plurality of sections according to the bridge length, and each section 2 of the UHPC-corrugated steel web combined box girder is set to be 4.8m according to actual construction requirements.
In this embodiment, two corrugated steel webs 23 are respectively disposed between the UHPC top plate 21 and the UHPC bottom plate 22 in parallel, the corrugated steel webs 23 are axially perpendicular to the UHPC top plate 21, the UHPC diaphragm 24 is perpendicular to the UHPC top plate 21 and the UHPC bottom plate 22, and two opposite side walls of the UHPC diaphragm 24 are respectively in corresponding contact with the two corrugated steel webs 23.
In the embodiment, the thickness of the UHPC top plate 21 is 0.20m, the thickness of the UHPC bottom plate 22 is 0.20 m-1.30 m, wherein the thickness of the UHPC bottom plate 22 at the midspan section is 0.20m, the thickness of the UHPC bottom plate 22 at the pier top fulcrum section is 1.30m, and the thickness of the UHPC bottom plate 22 between the midspan section and the pier top fulcrum section is in a gradual change; the thickness of the corrugated steel web 23 at the midspan section is 12mm, the thickness of the corrugated steel web 23 at the pier top fulcrum section is 30mm, and the thickness of the corrugated steel web 23 between the midspan section and the pier top fulcrum section is in a gradual change mode; the UHPC diaphragm 24 has a thickness of 0.18 m.
Referring to fig. 9 and 12, in the present embodiment, the shear keys 28 are uniformly distributed on the end surface of the UHPC top plate 21 and the end surface of the UHPC bottom plate 22, respectively, and the shear keys 28 are spline-type shear keys.
In this embodiment, the UHPC diaphragms 24 are arranged densely, and the UHPC diaphragms 24 are arranged at intervals of 4m in the longitudinal direction. The UHPC diaphragm 24 is primarily used for in vitro prestressed steering.
The construction method of the segmental prefabricated assembled UHPC-corrugated steel web combined box girder bridge comprises the following steps:
(1) finishing the construction of a pile foundation and a pier 1, and simultaneously prefabricating 2 sections of the UHPC-corrugated steel web plate combined box girder in an industrialized manner;
(2) constructing a No. 0 block on a main pier of the bridge and tensioning a prestressed tendon;
(3) assembling sections of the UHPC-corrugated steel web combined box girder 2 on two sides of a No. 0 block on a main pier symmetrically through cantilevers according to the sequence of section suspension assembly and prestressed steel beam 3 tensioning;
(4) constructing side span sections, completing side span closure, and tensioning side span prestressed steel bundles 3;
(5) mid-span closure is carried out, and prestressed steel bundles 3 are tensioned in a full-bridge span;
the construction method of the prefabricated assembled UHPC-corrugated steel web combined box girder bridge provided by the embodiment comprises the following steps:
1) completing the construction of a pile foundation and a pier 1, and prefabricating a plurality of UHPC-corrugated steel web plate combined box girder segments according to the designed length of the bridge;
2) constructing a zero block on the main pier of the bridge and tensioning a prestressed bundle;
3) according to the sequence of segment suspension splicing and prestressed steel beam 3 tensioning, a plurality of UHPC-corrugated steel web plate combined box girder segments which are prefabricated are symmetrically cantilever-spliced on two sides of a zero block on a main pier;
4) after construction, side span closure is completed, and side span prestress steel bundles 3 are tensioned;
5) further completing mid-span folding, and tensioning a prestressed steel beam 3 in the full-bridge span;
6) and (5) completing the auxiliary engineering and the bridge deck pavement, and completing the bridge construction.
Referring to fig. 11, in step 3), when the zero-number block is spliced with the UHPC-corrugated steel web composite box girder segment, an inner lining concrete layer 27 with the thickness of 0.20m is arranged on the corrugated steel web 23 in the area of 20m at the two ends of the zero-number block.
Referring to fig. 9 and 10, in step 3), when a plurality of UHPC-corrugated steel web plate combined box girder segments are spliced, the UHPC top plates 21 and the UHPC bottom plates 22 are connected through shear keys 28, and the corrugated steel webs are connected through bolts 4 and fillet welds 5.
The embodiment lists two bridges with different specifications, and the bridges are constructed by adopting the prefabricated assembled UHPC-corrugated steel web plate combined box girder bridge, wherein the thickness of the UHPC top plate 21 can also be other values within 0.15-0.30 m; the thickness of the UHPC bottom plate 22 is other values within 0.15 m-1.50 m, and the thickness of the UHPC bottom plate 22 between the midspan section and the pier top fulcrum section is in a gradual change mode; the thickness of the UHPC diaphragm plate 24 is 0.12 m-0.20 m; the thickness of the corrugated steel web plate 23 is 12 mm-30 mm, and the thickness of the corrugated steel web plate 23 between the midspan section and the section of the pier top fulcrum is in a gradual change mode; during construction, when the zero-number block and the UHPC-corrugated steel web combined box girder segment 2 are spliced, a lining concrete layer 27 can be arranged on the corrugated steel web 23 in the area of 15-25 m at the two ends of the zero-number block, and the thickness of the lining concrete layer 27 is selected within the range of 0.15-0.30 m.
In conclusion, the prefabricated assembled UHPC-corrugated steel web combined box girder bridge and the construction method thereof have the advantages that the structural design is simple, the stress characteristics are clear, the utilization rate of the material of the UHPC-corrugated steel web combined box girder is high, the self weight of the box girder bridge can be obviously reduced, and the main span of the bridge is greatly increased; the strength is high, the durability is good, and the problems of excessive downwarping and beam body cracking in the traditional prestressed concrete beam bridge span are solved; the prestress leading-in efficiency is higher, the advantages of a longitudinal unidirectional prestress system are better highlighted, bolt connection and fillet welding are adopted during construction, connection is reliable, and main beam damage caused by failure of web joint is avoided; the construction can adopt factory prefabricated box girder segments and assemble on site, thereby ensuring the quality of the bridge, greatly shortening the construction period on site and being very suitable for the design and construction of long-span continuous girders and continuous steel bridges.
Claims (10)
1. The utility model provides a prefabricated pin-connected panel UHPC-corrugated steel web combination box girder bridge which characterized in that: the prefabricated assembled UHPC-corrugated steel web plate combined box girder bridge comprises a pier (1) and a UHPC-corrugated steel web plate combined box girder which is arranged on the pier (1) and connected with the pier (1); the UHPC-corrugated steel web plate combined box girder is formed by sequentially assembling a plurality of UHPC-corrugated steel web plate combined box girder segments (2);
the UHPC-corrugated steel web combined box girder segment (2) comprises an UHPC top plate (21), an UHPC bottom plate (22), a corrugated steel web (23) and an UHPC transverse clapboard (24); the UHPC top plate (21) and the UHPC bottom plate (22) are axially arranged in parallel; the corrugated steel web plate (23) is arranged at the web plate position between the UHPC top plate (21) and the UHPC bottom plate (22); the UHPC diaphragm plate (24) is vertically placed between the UHPC top plate (21) and the UHPC bottom plate (22) and is in contact with the corrugated steel web plate (23); the end face of the UHPC top plate (21) and the end face of the UHPC bottom plate (22) are respectively provided with a shear key (28); and the UHPC bottom plate (22) is connected with the bridge pier (1).
2. The prefabricated assembled UHPC-corrugated steel web combined box girder bridge of claim 1, wherein: the thickness of the UHPC top plate (21) is 0.15-0.30 m; the thickness of the UHPC bottom plate (22) is 0.15-1.50 m; the thickness of the UHPC diaphragm plate (24) is 0.12-0.20 m; the thickness of the corrugated steel web plate (23) is 12 mm-30 mm.
3. The prefabricated assembled UHPC-corrugated steel web combined box girder bridge of claim 2, wherein: the shear key (28) is a spline-type shear key.
4. The prefabricated assembled UHPC-corrugated steel web combined box girder bridge of claim 3, wherein: an in-vivo prestressed steel strand pore channel (25) is respectively arranged in the UHPC top plate (21) and the UHPC bottom plate (22); the in-vivo prestressed steel strand pore canal (25) respectively penetrates through the axial direction of the UHPC top plate (21) and the axial direction of the UHPC bottom plate (22).
5. The prefabricated assembled UHPC-corrugated steel web combined box girder bridge of claim 4, wherein: the number of the UHPC transverse partition plates (24) is multiple, and the UHPC transverse partition plates are distributed at intervals of 4-8 m.
6. The prefabricated assembled UHPC-corrugated steel web combined box girder bridge of claim 5, wherein: an external prestressed steel beam pore channel (26) is arranged on the UHPC diaphragm plate (24); the axial direction of the external prestressed steel beam pore channel (26) is parallel to the axial direction of the corrugated steel web plate (23).
7. The prefabricated assembled UHPC-corrugated steel web combined box girder bridge of any one of claims 1-6, wherein: the length of the UHPC-corrugated steel web composite box girder segment (2) is 4.8m or 6.4 m.
8. The construction method of the prefabricated assembled UHPC-corrugated steel web combined box girder bridge of claim 7, characterized in that: the construction method comprises the following steps:
1) the construction of a pile foundation and a pier (1) is completed, and a plurality of UHPC-corrugated steel web plate combined box girder segments are prefabricated according to the designed length of the bridge;
2) constructing a zero block on the main pier of the bridge and tensioning a prestressed bundle;
3) according to the sequence of segment suspension splicing and prestressed steel beam (3) tensioning, a plurality of UHPC-corrugated steel web plate combined box girder segments which are prefabricated are symmetrically cantilever-spliced on two sides of a zero block on a main pier;
4) after construction, side span closure is completed, and side span prestress steel bundles (3) are tensioned;
5) further completing mid-span folding, and stretching the prestressed steel beam (3) in the full-bridge span;
6) and (5) completing the auxiliary engineering and the bridge deck pavement, and completing the bridge construction.
9. The construction method according to claim 8, wherein: and in the step 3), when the zero block and the UHPC-corrugated steel web combined box girder segment are spliced, an inner lining concrete layer (27) with the thickness of 0.15-0.30 m is arranged on the corrugated steel web (23) in the area of 15-25 m at the two ends of the zero block.
10. The construction method according to claim 9, wherein: in the step 3), when a plurality of UHPC-corrugated steel web plate combined box girder segments are spliced, the UHPC top plates (21) and the UHPC bottom plates (22) are connected through shear keys (28), and the corrugated steel webs are connected through bolts (4) and fillet welds (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110244776.8A CN113215949A (en) | 2021-03-05 | 2021-03-05 | Prefabricated assembled UHPC-corrugated steel web plate combined box girder bridge and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110244776.8A CN113215949A (en) | 2021-03-05 | 2021-03-05 | Prefabricated assembled UHPC-corrugated steel web plate combined box girder bridge and construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113215949A true CN113215949A (en) | 2021-08-06 |
Family
ID=77084750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110244776.8A Withdrawn CN113215949A (en) | 2021-03-05 | 2021-03-05 | Prefabricated assembled UHPC-corrugated steel web plate combined box girder bridge and construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113215949A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114197321A (en) * | 2022-01-06 | 2022-03-18 | 湖南大学 | Prestressed UHPC-NC combined continuous box girder bridge and construction method thereof |
| CN114214915A (en) * | 2021-12-31 | 2022-03-22 | 南京交通工程有限公司 | Partially prefabricated and assembled corrugated steel web combined box girder bridge structure and construction method |
| CN115125822A (en) * | 2022-09-05 | 2022-09-30 | 湖南大学 | Prestressed UHPC-NC mixed system continuous box girder bridge and construction method thereof |
| WO2023010679A1 (en) * | 2021-08-03 | 2023-02-09 | 苏交科集团股份有限公司 | Prefabricated assembly corrugated steel web composite bridge, and cantilever construction method thereof |
| CN115821713A (en) * | 2023-02-22 | 2023-03-21 | 湖南大学 | Corrugated steel web-containing continuous box girder bridge with prestress UHPC (ultra high performance concrete) composite structure and construction method thereof |
| WO2023184706A1 (en) * | 2022-03-30 | 2023-10-05 | 湖南大学 | Combined box girder structure and construction method therefor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102352597A (en) * | 2011-11-04 | 2012-02-15 | 湖南大学 | Prestressed ultrahigh-performance concrete continuous box girder bridge and construction method thereof |
| CN203212999U (en) * | 2013-03-27 | 2013-09-25 | 广东省冶金建筑设计研究院 | Vertical mixed continuous beam system of concrete beam and corrugated steel web concrete beam |
| CN106400666A (en) * | 2016-09-12 | 2017-02-15 | 东南大学 | Prestressed concrete-corrugated web steel box connecting beam hybrid beam structural system |
| CN206090273U (en) * | 2016-09-09 | 2017-04-12 | 湖南省交通规划勘察设计院 | Prefabricated UHPC of assembling of festival section wave form steel web combination box beam and cable -stay bridge |
| CN212077630U (en) * | 2020-01-08 | 2020-12-04 | 西安市政设计研究院有限公司 | Corrugated steel web prestress composite beam cantilever structure |
| CN214737295U (en) * | 2021-03-05 | 2021-11-16 | 湖南科技大学 | Prefabricated assembled UHPC-corrugated steel web plate combined box girder bridge |
-
2021
- 2021-03-05 CN CN202110244776.8A patent/CN113215949A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102352597A (en) * | 2011-11-04 | 2012-02-15 | 湖南大学 | Prestressed ultrahigh-performance concrete continuous box girder bridge and construction method thereof |
| CN203212999U (en) * | 2013-03-27 | 2013-09-25 | 广东省冶金建筑设计研究院 | Vertical mixed continuous beam system of concrete beam and corrugated steel web concrete beam |
| CN206090273U (en) * | 2016-09-09 | 2017-04-12 | 湖南省交通规划勘察设计院 | Prefabricated UHPC of assembling of festival section wave form steel web combination box beam and cable -stay bridge |
| CN106400666A (en) * | 2016-09-12 | 2017-02-15 | 东南大学 | Prestressed concrete-corrugated web steel box connecting beam hybrid beam structural system |
| CN212077630U (en) * | 2020-01-08 | 2020-12-04 | 西安市政设计研究院有限公司 | Corrugated steel web prestress composite beam cantilever structure |
| CN214737295U (en) * | 2021-03-05 | 2021-11-16 | 湖南科技大学 | Prefabricated assembled UHPC-corrugated steel web plate combined box girder bridge |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023010679A1 (en) * | 2021-08-03 | 2023-02-09 | 苏交科集团股份有限公司 | Prefabricated assembly corrugated steel web composite bridge, and cantilever construction method thereof |
| CN114214915A (en) * | 2021-12-31 | 2022-03-22 | 南京交通工程有限公司 | Partially prefabricated and assembled corrugated steel web combined box girder bridge structure and construction method |
| CN114197321A (en) * | 2022-01-06 | 2022-03-18 | 湖南大学 | Prestressed UHPC-NC combined continuous box girder bridge and construction method thereof |
| WO2023184706A1 (en) * | 2022-03-30 | 2023-10-05 | 湖南大学 | Combined box girder structure and construction method therefor |
| CN115125822A (en) * | 2022-09-05 | 2022-09-30 | 湖南大学 | Prestressed UHPC-NC mixed system continuous box girder bridge and construction method thereof |
| CN115821713A (en) * | 2023-02-22 | 2023-03-21 | 湖南大学 | Corrugated steel web-containing continuous box girder bridge with prestress UHPC (ultra high performance concrete) composite structure and construction method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN214737295U (en) | Prefabricated assembled UHPC-corrugated steel web plate combined box girder bridge | |
| CN113215949A (en) | Prefabricated assembled UHPC-corrugated steel web plate combined box girder bridge and construction method | |
| CN111206489A (en) | Assembled corrugated web steel box-UHPC (ultra high performance concrete) combined beam bridge and construction method | |
| CN109440625B (en) | Steel-concrete combined continuous rigid frame steel truss bridge | |
| CN108824162A (en) | A kind of steel_concrete composite beam and its construction method using plain plate and corrugated sheet steel mixing web | |
| CN109958049B (en) | Modular steel-concrete combined small box girder simply-supported continuous bridge and construction method thereof | |
| CN112012091A (en) | UHPC-NC mixed box girder, large-span rigid frame bridge and construction method thereof | |
| CN110924287A (en) | Semi-fabricated large-span combined box girder and construction method thereof | |
| CN109024219B (en) | Prefabricated ultrahigh-performance concrete-common concrete combined beam bridge structure and construction method | |
| CN113481826A (en) | Prefabricated assembled corrugated steel web combination box girder | |
| CN111021227B (en) | Steel-concrete composite structure continuous box girder and manufacturing method thereof | |
| CN110331664B (en) | Steel-concrete mixed continuous box girder bridge deck joint structure and construction method thereof | |
| CN111979891A (en) | Semi-through type rectangular concrete-filled steel tube combined truss girder bridge and construction method | |
| CN111206488A (en) | Large-span widened corrugated web steel box-concrete continuous beam bridge and construction method | |
| CN108221636B (en) | Steel-concrete composite beam bridge constructed by adopting bracket-free scheme for midspan and bridge forming method | |
| CN113789711A (en) | NC-UHPC combined assembly type prestressed concrete box girder, construction method and bridge thereof | |
| CN211772741U (en) | Large-span variable-width corrugated web steel box-concrete continuous beam bridge | |
| CN117107623A (en) | UHPC-corrugated steel web prefabricated assembled variable-section box girder structure and construction method | |
| CN115287996A (en) | Pier top UHPC-NC combined structure UHPC continuous box girder bridge and construction method thereof | |
| CN216919967U (en) | NC-UHPC combined assembly type concrete box girder and bridge thereof | |
| CN115125822A (en) | Prestressed UHPC-NC mixed system continuous box girder bridge and construction method thereof | |
| CN109356034A (en) | A kind of mixed composite continuous bridge superstructure system of vertically and horizontally Prestressed CFRP concrete steel | |
| CN214459554U (en) | Combined beam | |
| CN211947876U (en) | Variable-height corrugated web steel box-concrete continuous beam bridge | |
| CN212582397U (en) | Combined beam of steel, common concrete and ultrahigh-performance concrete |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20210806 |
|
| WW01 | Invention patent application withdrawn after publication |