CN111893887A - Construction method for prefabricated assembled corrugated steel web bridge stub - Google Patents
Construction method for prefabricated assembled corrugated steel web bridge stub Download PDFInfo
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- CN111893887A CN111893887A CN202010640091.0A CN202010640091A CN111893887A CN 111893887 A CN111893887 A CN 111893887A CN 202010640091 A CN202010640091 A CN 202010640091A CN 111893887 A CN111893887 A CN 111893887A
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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
- 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
- E01D21/10—Cantilevered erection
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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
Abstract
The invention discloses a construction method of a prefabricated assembled corrugated steel web bridge stub, which comprises the following steps of firstly constructing a pier foundation, completing cast-in-place construction of a 0# section and a 1# section on the pier foundation, adopting prefabricated construction for a 2# section and subsequent sections, and embedding a prefabricated corrugated steel web into a concrete web in the construction process of the 1# section; assembling a concrete prefabricated bottom plate, a concrete prefabricated top plate, a steel diaphragm plate and a prefabricated corrugated steel web plate in a factory to form a prefabricated corrugated steel web plate beam, hoisting the prefabricated corrugated steel web plate beam integrally assembled in the factory to a bridge, sequentially welding the prefabricated corrugated steel web plate, pouring a concrete bottom plate post-cast strip and a concrete top plate post-cast strip, and repeating the steps to complete the construction of the cantilever section of the bridge; and finally, constructing the bridge deck to finish the whole bridge construction. The invention adopts full-prefabricated construction, improves the concrete quality, shortens the time of field high-altitude operation and reduces the engineering risk.
Description
Technical Field
The invention relates to the field of bridge engineering, in particular to a corrugated web bridge construction method, and particularly relates to a corrugated steel web bridge stub construction method for prefabricated assembly construction.
Background
At the end of the last century, the research and application of corrugated steel web girder bridges have begun in China, and units such as department of transportation scientific research and design institute, southwest transportation university, southeast university, Chongqing transportation university and the like have studied the buckling strength, scheme design, effective width of bridge decks, shear connection keys and the like of steel webs. In 2006, along with the design and construction of bridges such as the main bridge of the Huanghe main bridge in Juancheng Shandong and the Nanshan bridge in Shenzhen, the PC bridge with the corrugated steel web in China enters into a scale-forming engineering practical stage. The corrugated steel web is used for modern bridge construction with the structural advantages of good economy, low carbon, environmental protection, constructability, diversity of modes and the like.
As shown in fig. 1, in the conventional corrugated steel web bridge segmental construction, generally, in order to facilitate installation of the first-segment corrugated steel web, 0# block and 1# block are constructed simultaneously. The construction sequence of each section of the corrugated steel web girder is as follows: the method comprises the steps of bottom film and side mold installation and adjustment → bottom plate steel bar (bottom layer) binding → installation of corrugated steel web → bottom plate binding, web, diaphragm plate steel bar, vertical prestress construction → installation of inner film → first concrete pouring construction → residual web and diaphragm plate steel bar binding, external beam tube embedding in advance → coil buckle support installation, template installation → top plate steel bar binding, top plate prestress pipeline installation, hanging basket embedded part installation → second concrete pouring → prestress cable installation, tensioning → pore channel grouting. As seen from the construction sequence, the traditional corrugated steel web bridge has small working surface and long working time during construction, and the danger of high-altitude operation is greatly increased; each construction step can be carried out after the previous construction step is finished, so that the construction period is greatly prolonged. Therefore, it is necessary to design a prefabricated assembled corrugated steel web beam and a short line construction method thereof to solve the above problems.
Disclosure of Invention
The invention aims to solve the problems that the existing connection mode of the corrugated steel web and the top bottom plate is mostly cast-in-place, the construction surface is small, the construction is difficult, the construction time is long and the like, and provides a prefabricated assembled construction corrugated steel web beam with simple construction process, low cost and high efficiency and a short line construction method thereof.
In order to solve the technical problems, the invention adopts factory processing and field connection construction of the prefabricated corrugated steel web beam to replace the simultaneous construction of the corrugated steel web and the cast-in-place of the top bottom plate, and the specific technical scheme is as follows:
a construction method for a prefabricated assembled corrugated steel web bridge stub is characterized by comprising the following steps:
Step 3.1, firstly hoisting the prefabricated corrugated steel web beam integrally assembled in a factory to a bridge, then temporarily fixing the prefabrication of the section of prefabricated corrugated steel web beam and the prefabricated corrugated steel web plate of the previous section through high-strength bolts, finally adjusting, and welding the prefabricated corrugated steel web plates when the elevation of the vertical mold is reached to form a welding seam between the corrugated steel web plates;
3.2, performing cast-in-place on the space between the concrete prefabricated bottom plate of the section of prefabricated corrugated steel web beam and the concrete prefabricated bottom plate of the previous section to form a concrete bottom plate post-cast strip;
3.3, performing cast-in-place on the space between the concrete prefabricated bottom plate of the section of prefabricated corrugated steel web beam and the concrete prefabricated bottom plate of the previous section to form a concrete roof post-cast strip;
and 5, constructing the bridge deck, and finishing the construction of the short lines of the full-prefabricated assembled corrugated steel web bridge.
Further, in step 2, the anchoring devices include three types, which are respectively as follows:
the first type is the corrugated steel web plate shear nails transversely welded at the upper end and the lower end of a prefabricated corrugated steel web plate, the corrugated steel web plate shear nails are pre-embedded in a concrete prefabricated bottom plate or a concrete prefabricated top plate, and the corrugated steel web plate shear nails in a concrete bottom plate post-cast strip or a concrete top plate post-cast strip are wrapped by pouring construction.
The second type comprises fixed plates welded at the upper end and the lower end of a prefabricated corrugated steel web plate and a connecting plate welded on the fixed plates, wherein a steel bar connecting hole is formed in the connecting plate;
and thirdly, the welding nail comprises a fixing plate welded at the upper end and the lower end of the prefabricated corrugated steel web and a corrugated steel web welding nail welded on the fixing plate.
Further, in step 2, the assembling method of the prefabricated corrugated steel web beam is as follows:
the corresponding positions of the upper surface of the concrete prefabricated bottom plate and the lower surface of the concrete prefabricated top plate are provided with concrete straight grooves connected with the prefabricated corrugated steel webs, the two prefabricated corrugated steel webs are fixed well by utilizing a temporary fixing device, then placing the steel diaphragm plate between the two prefabricated corrugated steel webs, forming an I-shaped frame by welding the steel diaphragm plate and the two prefabricated corrugated steel webs, then placing the I-shaped frame on the concrete prefabricated bottom plate, respectively placing the two prefabricated corrugated steel webs in the concrete straight grooves at corresponding positions, arranging longitudinal steel bars connected with the anchoring device in the concrete straight groove, then pouring the concrete straight groove, and assembling the concrete prefabricated bottom plate and the prefabricated corrugated steel web plates, and assembling the concrete prefabricated top plate on the tops of the two prefabricated corrugated steel web plates according to the same method to complete the assembly of the prefabricated corrugated steel web plate beam.
Further, in step 3.2, the concrete construction method of the post-cast strip of the concrete bottom plate comprises the following steps:
the method comprises the steps of firstly conducting chiseling treatment on the connecting parts of the concrete prefabricated bottom plates, erecting a formwork on the post-cast strip of the concrete bottom plates, then binding U-shaped connecting reinforcing steel bars, and then conducting cast-in-place construction to form the post-cast strip of the concrete bottom plates.
Further, in step 3.3, the concrete construction method of the post-cast strip of the concrete roof comprises the following steps:
the method comprises the steps of firstly conducting chiseling treatment on the connecting parts of the precast concrete top plates, then conducting formwork support on the post-cast strip of the precast concrete top plates, then binding U-shaped connecting reinforcing steel bars, and then conducting cast-in-place construction to form the post-cast strip of the precast concrete bottom plates.
Further, in steps 3.2 and 3.3, the U-shaped connecting steel bar binding method comprises the following steps:
the U-shaped connecting steel bars and the previous U-shaped connecting steel bars are connected in a cross mode, transverse steel bars are inserted between the U-shaped connecting steel bars, reserved bolt holes of fixing steel plates on prefabricated corrugated steel webs located in the post-cast strip area of the concrete bottom plate or the post-cast strip area of the concrete top plate are screwed into high-strength bolts, the transverse steel bars are connected with the high-strength bolts in a spot welding mode, the upper layer of transverse steel bars and the lower layer of transverse steel bars are connected through stirrups, and binding of the U-shaped connecting steel bars is completed.
The invention has the beneficial effects that:
the construction of watering after hoisting through prefabricated corrugated steel web plate segment beam replaces traditional cast-in-place integral construction, realizes prefabricated construction, improves concrete quality, shortens the time of on-site high-altitude operation, reduces engineering risks, is green and environment-friendly, accelerates the total progress of engineering, shortens construction period, has lower construction cost, and especially has strong market competitiveness in municipal works, environmental protection district engineering and emergency engineering.
Drawings
FIG. 1 is a flow chart of construction of each section of a conventional corrugated steel web bridge.
FIG. 2 is a schematic diagram of the prefabrication and assembly construction of the invention.
Fig. 3 is a schematic view of a prefabricated corrugated steel web beam structure.
Fig. 4 is three structural diagrams of a prefabricated corrugated steel web, wherein fig. 4(a) is a structural diagram in example 1, fig. 4(b) is a structural diagram in example 2, and fig. 4(c) is a structural diagram in example 3.
Fig. 5 is a construction drawing of a 0# and 1# block beam in the first construction step.
And FIG. 6 is a construction drawing for hoisting the prefabricated corrugated steel web beam in the third construction step.
FIG. 7 is a construction drawing of the connection of the corrugated steel web in the third construction step.
Fig. 8 is a left and top plan view of the corrugated steel web of fig. 7.
Fig. 9 is a construction drawing of the concrete bottom plate cast-in-place in the fourth construction step.
Fig. 10 is a left side view of fig. 9.
Fig. 11 is a construction drawing of the concrete roof cast-in-place in the fifth construction step.
Fig. 12 is a left side view of fig. 11.
FIG. 13 is a construction drawing of a three-span cantilever in the sixth construction step.
FIG. 14 is a construction drawing of a closure section in the seventh construction step.
1-precast concrete bottom plate, 1.1-U-shaped connecting steel bar, 1.2-precast concrete bottom plate post-pouring belt, 2-precast concrete top plate, 2.1-U-shaped connecting steel bar, 1.2-precast concrete top plate post-pouring belt, 3-precast corrugated steel web plate, 3.1-corrugated steel web plate inter-bolt hole, 3.2-corrugated steel web plate shear nail, 3.3-corrugated steel web plate to-be-poured area, 3.4-high-strength bolt, 3.5-corrugated steel web plate inter-welding seam, 3.6-corrugated steel web plate top view, 3.7-corrugated steel web plate left view, 3.8-corrugated steel web plate steel bar hole, 3.8-fixed plate, 3.9-connecting plate, 3.10-steel bar connecting hole, 3.11-corrugated steel web plate welding nail, 4-steel diaphragm plate, 4.1-manhole, 5-precast corrugated steel web plate girder and 6-foundation pier.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
The mode and implementation steps of the invention are further described below by taking a single box type corrugated steel web beam as an example and combining the accompanying drawings:
firstly, as shown in fig. 5, a pier foundation 6 is constructed, the cantilever section of the bridge is constructed in sections, cast-in-place construction of a 0# section and a 1# section is completed, prefabrication construction is adopted for a 2# section and subsequent sections, a prefabricated corrugated steel web 3 is embedded into a concrete web in the construction process of the 1# section, and U-shaped connecting steel bars 1.1 and 2.1 are reserved at the end parts of a top plate and a bottom plate of the 1# section.
Secondly, preparing a prefabricated corrugated steel web beam in a factory, manufacturing a concrete prefabricated bottom plate 1, a concrete prefabricated top plate 2, a steel diaphragm plate 4 and a prefabricated corrugated steel web plate 3 in the factory, and pre-embedding U-shaped connecting reinforcing steel bars 1.1 and 2.1 for connection at two ends of the concrete prefabricated bottom plate 1 and two ends of the concrete prefabricated top plate 2 respectively; the prefabricated corrugated steel web plate comprises a prefabricated corrugated steel web plate 3, and is characterized in that anchoring devices connected with a prefabricated concrete bottom plate 1 or a prefabricated concrete top plate 2 are respectively arranged at the upper end and the lower end of the prefabricated corrugated steel web plate 3, the prefabricated concrete bottom plate 1, the prefabricated concrete top plate 2, a steel diaphragm plate 4 and the prefabricated corrugated steel web plate 3 are assembled to form a prefabricated corrugated steel web plate beam 5, the prefabricated corrugated steel web plate 3 extends out of the two ends of the prefabricated corrugated steel web plate beam to form a corrugated steel web plate pouring area, namely the prefabricated concrete bottom plate 1 and the prefabricated concrete top plate 2 are relatively retracted;
thirdly, as shown in fig. 3 and 6 to 8, firstly hoisting the prefabricated corrugated steel web beam 5 integrally assembled in a factory to a bridge, then temporarily fixing the prefabricated corrugated steel web 3 of the section of prefabricated corrugated steel web beam 5 with the prefabricated corrugated steel web 3 of the previous section (section # 1) through high-strength bolts 3.4 and bolt holes 3.1 between the corrugated steel webs, finally adjusting, and welding when the elevation of the vertical mold is reached to form a welding seam 3.5 between the corrugated steel webs (the weather temperature during welding needs to be controlled).
Fourthly, as shown in fig. 4, 9 and 10, chiseling the connection part between the precast concrete bottom plates 1, erecting a formwork, cross-connecting the U-shaped connecting steel bars 1.1 with the previous section of U-shaped connecting steel bars 1.1, inserting the transverse steel bars 8 between the U-shaped connecting steel bars 1.1, binding, arranging two rows of the transverse steel bars 8, connecting or binding the transverse steel bars 8 with the anchoring devices on the precast corrugated steel web 3 (i.e. the transverse steel bars 8 pass through the steel bar connection holes 3.10 or are welded on the shear nails 3.2 of the corrugated steel web or are welded on the welding nails 3.11 of the corrugated steel web), and forming the precast concrete bottom plate post-cast strip 1.2 by pouring construction and the precast concrete bottom plate 1, the U-shaped connecting steel bars 1.1, the transverse steel bars 8 and the anchoring devices of the previous section of precast corrugated steel web beam.
Fifthly, as shown in fig. 4, 11 and 12, chiseling the connecting part between the precast concrete top plates 2, erecting a formwork, cross-connecting the U-shaped connecting steel bars 2.1 with the previous section of U-shaped connecting steel bars 2.1, inserting the transverse steel bars 8 between the U-shaped connecting steel bars 2.1, binding, arranging two rows of the transverse steel bars 8, welding or binding the transverse steel bars 8 with the anchoring devices on the precast corrugated steel web 3 (i.e. the transverse steel bars 8 pass through the steel bar connecting holes 3.10 or are welded on the shear nails 3.2 of the corrugated steel web or are welded on the welding nails 3.11 of the corrugated steel web), and forming the top plate post-cast strip 2.2 by pouring construction and the precast concrete top plate 2, the U-shaped connecting steel bars 2.1, the transverse steel bars 8 and the anchoring devices of the previous section of precast corrugated steel web.
And sixthly, as shown in fig. 13, circularly constructing the third step to the fifth step to finish the construction of the cantilever section.
Seventhly, as shown in fig. 14, adopting concrete cast-in-place construction to close the section, firstly erecting a formwork, binding steel bars through the steel bar holes 3.8 of the corrugated steel web plate to connect the corrugated steel web plate with the steel bars of the concrete web plate, and pouring concrete to complete the cast-in-place construction of the closure section.
And eighthly, carrying out bridge deck construction and finishing full-bridge construction.
The anchoring device in the embodiment of the invention comprises three anchoring devices, which are respectively as follows:
in embodiment 1, as shown in fig. 4(a), the corrugated steel web shear nails are transversely welded at the upper end and the lower end of the prefabricated corrugated steel web, the corrugated steel web shear nails are pre-embedded in the concrete prefabricated bottom plate or the concrete prefabricated top plate, and the corrugated steel web shear nails in the concrete bottom plate post-cast strip or the concrete top plate post-cast strip are wrapped by pouring construction.
example 3, as shown in fig. 4(c), includes fixing plates welded to the upper and lower ends of a prefabricated corrugated steel web, and a corrugated steel web welding nail welded to the fixing plates.
In the embodiment of the invention, the assembling method of the prefabricated corrugated steel web beam comprises the following steps:
as shown in fig. 3, the corresponding positions of the upper surface of the precast concrete bottom plate 1 and the lower surface of the precast concrete top plate 2 are provided with a straight concrete groove connected with precast corrugated steel webs 3, the two precast corrugated steel webs 3 are fixed by a temporary fixing device, then a steel diaphragm plate 4 is placed between the two precast corrugated steel webs 3, the steel diaphragm plate and the two precast corrugated steel webs are formed into an i-shaped frame by welding, then the i-shaped frame is placed on the precast concrete bottom plate 1, the two precast corrugated steel webs 3 are respectively positioned in the straight concrete grooves at the corresponding positions, longitudinal steel bars connected with an anchoring device are arranged in the straight concrete groove, then the straight concrete groove is poured, so that the precast concrete bottom plate and the precast corrugated steel webs are assembled, the precast concrete top plate 2 is assembled on the tops of the two precast corrugated steel webs 3 according to the same method, and finishing the assembly of the prefabricated corrugated steel web girder 5.
The above embodiments are merely illustrative of the present invention and are not to be construed as limiting the invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and the technical solution of the present invention is covered by the claims of the present invention.
Claims (6)
1. A construction method for a prefabricated assembled corrugated steel web bridge stub is characterized by comprising the following steps:
step 1, constructing a pier foundation, constructing cantilever sections of a bridge in sections on the pier foundation, completing cast-in-place construction of a 0# section and a 1# section, adopting prefabrication construction for a 2# section and subsequent sections, embedding prefabricated corrugated steel webs into concrete webs in the construction process of the 1# section, and reserving U-shaped connecting steel bars at the end parts of a top plate and a bottom plate of the 1# section;
step 2, preparing a prefabricated corrugated steel web beam, namely manufacturing a concrete prefabricated bottom plate, a concrete prefabricated top plate, a steel diaphragm plate and a prefabricated corrugated steel web plate in a factory, wherein U-shaped connecting steel bars for connection are respectively embedded at two ends of the concrete prefabricated bottom plate and two ends of the concrete prefabricated top plate; the upper end and the lower end of the prefabricated corrugated steel web plate are respectively provided with an anchoring device connected with the concrete prefabricated bottom plate or the concrete prefabricated top plate, the concrete prefabricated bottom plate, the concrete prefabricated top plate, the steel diaphragm plate and the prefabricated corrugated steel web plate are assembled to form a prefabricated corrugated steel web plate beam, and the prefabricated corrugated steel web plate extends out of the two ends of the prefabricated corrugated steel web plate beam, namely the concrete prefabricated bottom plate and the concrete prefabricated top plate are relatively retracted;
step 3, 2# segment construction
Step 3.1, firstly hoisting the prefabricated corrugated steel web beam integrally assembled in a factory to a bridge, then temporarily fixing the prefabrication of the section of prefabricated corrugated steel web beam and the prefabricated corrugated steel web plate of the previous section through high-strength bolts, finally adjusting, and welding the prefabricated corrugated steel web plates when the elevation of the vertical mold is reached to form a welding seam between the corrugated steel web plates;
3.2, performing cast-in-place on the space between the concrete prefabricated bottom plate of the section of prefabricated corrugated steel web beam and the concrete prefabricated bottom plate of the previous section to form a concrete bottom plate post-cast strip;
3.3, performing cast-in-place on the space between the concrete prefabricated bottom plate of the section of prefabricated corrugated steel web beam and the concrete prefabricated bottom plate of the previous section to form a concrete roof post-cast strip;
step 4, repeating the step 3, constructing the No. 3 and the later sections until the construction of the cantilever section of the bridge is completed, and then carrying out cast-in-place construction on the closure section;
and 5, constructing the bridge deck, and finishing the construction of the short lines of the full-prefabricated assembled corrugated steel web bridge.
2. The construction method of the prefabricated assembled corrugated steel web bridge stub as claimed in claim 1, wherein: in step 2, the anchoring devices include three types, which are respectively as follows:
the first type is a corrugated steel web plate shear nail transversely welded at the upper end and the lower end of a prefabricated corrugated steel web plate, the corrugated steel web plate shear nail is pre-embedded in a concrete prefabricated bottom plate or a concrete prefabricated top plate, and the corrugated steel web plate shear nail in a concrete bottom plate post-cast strip or a concrete top plate post-cast strip is wrapped by pouring construction;
the second type comprises fixed plates welded at the upper end and the lower end of a prefabricated corrugated steel web plate and a connecting plate welded on the fixed plates, wherein a steel bar connecting hole is formed in the connecting plate;
and thirdly, the welding nail comprises a fixing plate welded at the upper end and the lower end of the prefabricated corrugated steel web and a corrugated steel web welding nail welded on the fixing plate.
3. The construction method of the prefabricated assembled corrugated steel web bridge stub as claimed in claim 2, wherein: in step 2, the prefabricated corrugated steel web beam assembling method comprises the following steps:
the corresponding positions of the upper surface of the concrete prefabricated bottom plate and the lower surface of the concrete prefabricated top plate are provided with concrete straight grooves connected with the prefabricated corrugated steel webs, the two prefabricated corrugated steel webs are fixed well by utilizing a temporary fixing device, then placing the steel diaphragm plate between the two prefabricated corrugated steel webs, forming an I-shaped frame by welding the steel diaphragm plate and the two prefabricated corrugated steel webs, then placing the I-shaped frame on the concrete prefabricated bottom plate, respectively placing the two prefabricated corrugated steel webs in the concrete straight grooves at corresponding positions, arranging longitudinal steel bars connected with the anchoring device in the concrete straight groove, then pouring the concrete straight groove, and assembling the concrete prefabricated bottom plate and the prefabricated corrugated steel web plates, and assembling the concrete prefabricated top plate on the tops of the two prefabricated corrugated steel web plates according to the same method to complete the assembly of the prefabricated corrugated steel web plate beam.
4. The construction method of the prefabricated assembled corrugated steel web bridge stub as claimed in claim 3, wherein: in the step 3.2, the concrete construction method of the post-cast strip of the concrete bottom plate comprises the following steps:
the method comprises the steps of firstly conducting chiseling treatment on the connecting parts of the concrete prefabricated bottom plates, erecting a formwork on the post-cast strip of the concrete bottom plates, then binding U-shaped connecting reinforcing steel bars, and then conducting cast-in-place construction to form the post-cast strip of the concrete bottom plates.
5. The construction method of the prefabricated assembled corrugated steel web bridge stub as claimed in claim 4, wherein: in step 3.3, the concrete construction method of the post-cast strip of the concrete roof comprises the following steps:
the method comprises the steps of firstly conducting chiseling treatment on the connecting parts of the precast concrete top plates, then conducting formwork support on the post-cast strip of the precast concrete top plates, then binding U-shaped connecting reinforcing steel bars, and then conducting cast-in-place construction to form the post-cast strip of the precast concrete bottom plates.
6. The construction method of the prefabricated assembled corrugated steel web bridge stub as claimed in claim 5, wherein: in steps 3.2 and 3.3, the U-shaped connecting steel bar binding method comprises the following steps:
the U-shaped connecting steel bars and the previous U-shaped connecting steel bars are connected in a cross mode, transverse steel bars are inserted between the U-shaped connecting steel bars, reserved bolt holes of fixing steel plates on prefabricated corrugated steel webs located in the post-cast strip area of the concrete bottom plate or the post-cast strip area of the concrete top plate are screwed into high-strength bolts, the transverse steel bars are connected with the high-strength bolts in a spot welding mode, the upper layer of transverse steel bars and the lower layer of transverse steel bars are connected through stirrups, and binding of the U-shaped connecting steel bars is completed.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113417217A (en) * | 2021-07-27 | 2021-09-21 | 苏交科集团股份有限公司 | Assembling process of light segment prefabricated assembled bent cap |
| CN114150586A (en) * | 2021-12-14 | 2022-03-08 | 中国铁建大桥工程局集团有限公司 | Wave-shaped steel web continuous box girder bridge segment suspension casting asynchronous construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113417217A (en) * | 2021-07-27 | 2021-09-21 | 苏交科集团股份有限公司 | Assembling process of light segment prefabricated assembled bent cap |
| CN114150586A (en) * | 2021-12-14 | 2022-03-08 | 中国铁建大桥工程局集团有限公司 | Wave-shaped steel web continuous box girder bridge segment suspension casting asynchronous construction method |
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| CN111893887B (en) | 2021-09-03 |
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