CN115573237A - Quickly-detachable assembled UHPC-LP steel-concrete composite beam bridge and construction method thereof - Google Patents
Quickly-detachable assembled UHPC-LP steel-concrete composite beam bridge and construction method thereof Download PDFInfo
- Publication number
- CN115573237A CN115573237A CN202211272877.7A CN202211272877A CN115573237A CN 115573237 A CN115573237 A CN 115573237A CN 202211272877 A CN202211272877 A CN 202211272877A CN 115573237 A CN115573237 A CN 115573237A
- Authority
- CN
- China
- Prior art keywords
- steel
- bridge deck
- uhpc
- bridge
- concrete
- 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.)
- Pending
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D1/00—Bridges in general
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a rapidly detachable assembled UHPC-LP steel-concrete composite beam bridge and a construction method thereof. The invention innovatively adopts a connection mode of the steel beam and the bridge deck, and realizes quick disassembly and replacement of the bridge deck; according to the invention, two high-performance materials of UHPC and LP steel are simultaneously adopted in the steel-concrete composite structure, the material utilization efficiency is fully exerted according to the effective working width of the structure, welding seams in the manufacturing of steel beams are reduced, the high lightweight and economical design of the steel-concrete composite bridge is realized, and the transportation and the installation are convenient; the structure has the remarkable advantages of excellent bearing performance and durability, good economic performance, convenience in construction, convenience in replacement, accordance with the current sustainable development low-carbon construction concept and the like.
Description
Technical Field
The invention relates to an assembled UHPC-LP steel-concrete composite beam bridge capable of being rapidly disassembled and replaced based on effective working width and a construction method thereof, belongs to the field of engineering construction, particularly the field of bridges, and has the remarkable advantages of excellent bearing performance and durability, good economic performance, convenience in construction and replacement, accordance with the current green low-carbon construction concept and the like.
Background
The steel-concrete composite structure simply supported beam bridge has the advantages that the concrete slab on the upper edge of the section is in a compression state, most of the steel structure below the concrete slab is in a tension state, and the advantages of the respective mechanical properties of steel and concrete can be finally exerted. The steel-concrete combined structure integrates the advantages of steel and concrete due to simple structure, is convenient for standardized production and assembly type construction, and gradually becomes the key development direction of medium and small span bridge engineering in China.
However, the steel-concrete composite structure has the following problems due to its structural characteristics:
(1) The sustainable development of the building is very important. The traditional steel-concrete composite beam bridge mostly uses welded stud shearing connecting pieces, the bridge deck of the traditional steel-concrete composite beam bridge cannot be conveniently and efficiently disassembled and recycled, the traffic interruption time is long in the disassembling process, the social influence is large, and a large amount of building waste can be generated to cause environmental problems such as construction dust emission and the like;
(2) The structure economic performance needs to be improved. Compared with the traditional concrete bridge, the steel unit price is higher than that of concrete, and the construction cost of most of the current steel-concrete composite bridge is higher, so that the technical innovation on material selection and structural design is needed to reduce the construction cost;
(3) The construction of the joints of the precast concrete bridge decks is difficult. In order to limit the cracking of the concrete bridge deck slab, two measures of increasing the slab thickness and reinforcing the reinforcing bars are generally adopted; the diameter of the steel bar is often large (the diameter of the main steel bar stressed in the hogging moment area is usually more than 25 mm), so that the problems that the construction operation space of the prefabricated bridge deck at the wet joint connection part is small, the steel bars are easy to conflict, the field installation is difficult and the like are caused; in addition, the welding workload of the on-site wet joint longitudinal steel bars is also more complicated.
The problems restrict the development and application of the steel-concrete composite beam bridge, so that a novel assembly type steel-concrete composite beam bridge which can be quickly disassembled and replaced, has excellent durability, good economic performance and convenient construction and meets the current sustainable development low-carbon construction concept is urgently required to be created by starting from materials and structural types.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an assembled UHPC-LP steel-concrete composite beam bridge which can be quickly disassembled and replaced based on the effective working width and a construction method thereof.
The purpose of the invention is realized by the following technical scheme:
a rapidly detachable assembled UHPC-LP steel-concrete composite beam bridge comprises a prefabricated UHPC bridge deck, a shear groove and an LP steel main beam;
the prefabricated UHPC bridge deck slabs are longitudinally and transversely connected through transverse wet joints and cast-in-place common concrete bridge deck slabs, the shear grooves are formed in the prefabricated UHPC bridge deck slabs, high-strength bolt connecting pairs are arranged on the top plate of the LP steel main beam and are arranged in the shear grooves, and concrete is poured in the shear grooves.
The further technology of the invention is as follows:
preferably, annular longitudinal steel bars and annular transverse steel bars are arranged in the prefabricated UHPC bridge deck slab and are connected with transverse wet joints and cast-in-place common concrete bridge deck slabs in a staggered mode.
Preferentially, the LP steel main beam is formed by welding a top plate of equal-thickness steel, a web plate of longitudinal thickened steel and a bottom plate of longitudinal thickened steel together.
Preferably, the high-strength bolt connection pair consists of a high-strength nut, a high-strength bolt, an embedded nut and a mounting nut, the high-strength bolt is fixed on the top plate of the LP steel main beam through the embedded nut and the mounting nut, and the high-strength nut is connected to the top of the high-strength bolt.
The invention also provides a construction method of the assembled UHPC-LP steel-concrete composite beam bridge capable of being rapidly disassembled, which comprises the following steps:
step 1: the high-strength bolt is fixed at the designed position of the top plate of the LP steel girder through the embedded nut and the mounting nut;
and 2, step: prefabricating a UHPC bridge deck;
and 3, step 3: hoisting the prefabricated UHPC bridge deck to the upper flange of the LP steel beam, and paying attention to the accurate position adjustment to avoid the collision of the steel bars in the slab with the high-strength bolts and the steel bars of the adjacent slabs;
and 4, step 4: pouring a cast-in-place common concrete bridge deck slab in the prefabricated UHPC bridge deck slab, pouring wet joints and supplementary shrinkage concrete in the shear grooves, and curing according to design requirements;
and 5: installing auxiliary facilities such as guardrails, expansion joints, bridge deck pavement and the like;
step 6: when the bearing performance or service life of the bridge deck exceeds the standard requirement and needs to be removed and replaced, firstly removing auxiliary facilities such as guardrails, pavements and the like on the bridge deck, then removing concrete in wet joints, and unscrewing mounting nuts of the high-strength bolt connecting pairs to realize separation of the steel beams and the bridge deck; and (5) repeating the steps 3 to 5, and realizing replacement and installation.
Generally, compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
1. the structure of the invention accords with the policy of sustainable development, and has remarkable social benefit. The detachable high-strength bolt connecting pair is adopted, the bridge deck and the steel beam of the combined structure can be quickly combined and separated, so that the damaged bridge deck can be quickly replaced and the plates can be reused, the influence on the existing traffic is small, the pollution is less, the method is particularly suitable for quickly constructing rescue channels after disasters such as earthquakes, fire disasters and the like, and the low-carbon construction concept of sustainable development is met;
2. the structure of the invention has remarkable economic benefit. The structure of the invention realizes high lightweight and economical design, which is specifically embodied as follows: 1) The prefabricated concrete bridge deck is made of UHPC materials, the thickness and the size of the structural slab are remarkably reduced, the diameter of the required steel bar is remarkably reduced or only the construction and reinforcement are needed; 2) The width of the prefabricated UHPC bridge deck is determined according to the width of an effective working section obtained by shear hysteresis effect calculation, so that the material utilization efficiency is fully exerted, and the construction cost is further reduced; 3) The steel girder manufactured by adopting the LP steel realizes the linear change of the plate thickness along with the stress, gives full play to the utilization efficiency of steel materials, reduces welding seams in the manufacture of the steel girder, and can reduce the steel consumption of the whole structure by more than 10 percent; 4) The lightweight cross-sectional design reduces the structure dead load, reduces the burden of the steel beam and effectively reduces the manufacturing cost.
3. The invention is more convenient and fast in construction, and is specifically embodied as follows: 1) The prefabricated UHPC bridge deck is simple and light in structure and simple to transport and hoist; 2) The diameter of the steel bar in the UHPC bridge deck slab does not exceed 16mm or only needs to construct reinforcing bars, the wet joints are connected in a staggered mode by adopting annular steel bars, the operation space is remarkably improved, meanwhile, field welding is avoided, and the problem of corresponding construction difficulty caused by the traditional technology is effectively solved; 3) The invention adopts the steel girder made of LP steel, reduces the welding seams made by the steel girder, saves the manufacturing cost and improves the construction efficiency.
4. The invention economically and efficiently solves the technical problem of the traditional composite beam, has simple and reasonable structure, convenient construction and strong universality, can be widely applied to other engineering construction fields except bridge engineering, and has wide application prospect.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the main LP steel beam of FIG. 1 with high-strength bolt secondary connections;
fig. 3 is a cross-sectional view of the LP steel girder of fig. 2;
FIG. 4 is a schematic plan view of the prefabricated UHPC deck panel of FIG. 1;
FIG. 5 is a schematic representation of a wet joint and shear groove pattern of the prefabricated UHPC deck slab of FIG. 1;
in the figure, 1-prefabricated UHPC bridge deck slab, 2-cast-in-place common concrete bridge deck slab, 3-transverse wet joint, 4-shear groove, 5-annular longitudinal steel bar, 6-annular transverse steel bar, 7-high-strength bolt connecting pair, 7 a-high-strength bolt, 7 b-high-strength bolt, 7 c-embedded nut, 7 d-mounting nut, 8-LP steel main beam, 9-longitudinal thickening steel bottom plate, 10-longitudinal thickening steel web plate, and 11-equal-thickness steel top plate.
Detailed Description
The present invention will be further described with reference to the following detailed description and the accompanying drawings, which are provided for the purpose of illustrating the invention and are not intended to limit the invention to the particular embodiments disclosed. Other embodiments obtained by persons skilled in the art without making creative efforts based on the embodiments in the implementation belong to the protection scope of the invention.
Referring to fig. 1-5, the invention provides an assembled UHPC-LP steel-concrete composite beam bridge capable of being rapidly disassembled, which comprises a prefabricated UHPC bridge deck 1, a cast-in-place ordinary concrete bridge deck 2, a transverse wet joint 3, a shear groove 4, an annular longitudinal steel bar 5, an annular transverse steel bar 6, a high-strength bolt connection pair 7 and an LP (longitudinally thickened steel) steel main beam 8.
The prefabricated UHPC bridge deck boards 1 are longitudinally and transversely connected through transverse wet joints 3 and cast-in-place common concrete bridge deck boards 2 respectively, annular longitudinal steel bars 5 and annular transverse steel bars 6 which are arranged in the prefabricated UHPC bridge deck boards and are arranged in the wet joints 3 and the cast-in-place common concrete bridge deck boards 2 in a staggered connection mode are connected with each other, and a combined structure is formed by high-strength bolt connecting pairs 7 and an LP steel main beam 8;
the width of the prefabricated UHPC bridge deck slab 1 is determined according to the width of an effective working section obtained by shear hysteresis effect calculation, the thickness is 17-25 cm, the ultra-high performance concrete with the compressive strength of more than 120MPa, the axial tensile strength of more than 8MPa and the expansion degree of 550mm is adopted, and an annular longitudinal steel bar 5 and an annular transverse steel bar 6 with the diameter of no more than 16mm are arranged in the ultra-high performance concrete;
the width of the cast-in-place common concrete bridge deck 2 is determined according to the width of an effective working section obtained by shear hysteresis effect calculation, the thickness of the cast-in-place common concrete bridge deck is consistent with that of a cantilever end of the UHPC board 1, and the strength grade of concrete of the cast-in-place common concrete bridge deck is not lower than C40;
the width of the transverse wet joint 3 is not lower than 40cm, the compensation shrinkage concrete with the strength grade not lower than C50 is poured in the transverse wet joint, and the expansion rate is limited to 4x10 -4 To 6x10 -4 The annular longitudinal steel bars 5 in the prefabricated UHPC bridge deck 1 are arranged in a staggered mode;
the shear groove 5 is arranged in the prefabricated UHPC bridge deck 1, the compensating shrinkage concrete with the strength grade not lower than C50 is poured in the shear groove, and the expansion rate is limited to 4x10 -4 To 6x10 -4 A high-strength bolt connecting pair 7 arranged on a top plate 11 of the LP steel girder is arranged in the high-strength bolt connecting pair;
the high-strength bolt connecting pair 7 consists of a high-strength nut 7a, a high-strength bolt 7b, an embedded nut 7c and a mounting nut 7d, and is arranged on the top plate 11 of the LP steel girder, and the arrangement positions of the shear grooves 4 are kept away from the annular longitudinal steel bars 5 and the annular transverse steel bars 6;
the LP steel girder 8 is made of longitudinal variable-thickness steel through a variable-thickness rolling process for continuously and dynamically changing roll gaps in the rolling process, and is formed by welding a uniform-thickness steel top plate 11, a longitudinal variable-thickness steel web plate 10 and a longitudinal variable-thickness steel bottom plate 9 together.
A construction method of an assembled UHPC-LP steel-concrete composite beam bridge which can be quickly disassembled and replaced based on effective working width comprises the following steps:
step 1: after LP steel plate pieces meeting the requirements are manufactured in a factory through a variable thickness rolling process, an LP steel main beam 8 is manufactured according to the design requirements, and the high-strength bolt 7 is fixed at the design position of an LP steel main beam top plate 11 through an embedded nut 7c and a mounting nut 7 d;
step 2: pouring a prefabricated UHPC bridge deck 1 according to design requirements in a factory, and watering and maintaining for more than 7 days;
and step 3: all components meeting the design requirements are transported to a construction site, and necessary protection measures are made;
and 4, step 4: after the steel beam is hoisted to the design position, the prefabricated UHPC bridge deck slab 1 is hoisted to the upper flange of the LP steel beam 8, the position is accurately adjusted, and the collision of the steel bars in the slab, the high-strength bolts 7 and the steel bars of the adjacent slabs is avoided;
and 5: pouring a cast-in-place common concrete bridge deck 2 in the prefabricated UHPC bridge deck 1, pouring the shrinkage concrete in the wet joint 3 and the shear groove 4, and curing according to design requirements;
and 6: installing auxiliary facilities such as guardrails, expansion joints, bridge deck pavement and the like;
and 7: when the bearing performance or service life of the bridge deck exceeds the standard requirement and needs to be removed and replaced, firstly removing auxiliary facilities such as guardrails, pavements and the like on the bridge deck, then removing concrete in the wet joint 3, and unscrewing mounting nuts 7d of the high-strength bolt connecting pairs 7 to realize the separation of the steel beam and the bridge deck; and 4, repeating the steps 4 to 6 to realize replacement and installation.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
In the present invention, features are not necessarily present in isolation, but are interleaved with each other unless explicitly stated or limited. The foregoing shows and describes the principles, essential features, and advantages of the invention. Those skilled in the art should appreciate that the present invention is not limited to the above-described embodiments, and the above-described embodiments and descriptions are only preferred examples of the present invention, and are not intended to limit the present invention to the only choice. The invention may be further modified and optimized within the spirit and scope of the appended claims, all changes that come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (5)
1. The utility model provides an assembled UHPC-LP steel-concrete composite beam bridge that can dismantle fast which characterized in that: the method comprises prefabricating a UHPC bridge deck, a shear groove and an LP steel main beam;
the prefabricated UHPC bridge deck slabs are longitudinally and transversely connected through transverse wet joints and cast-in-place common concrete bridge deck slabs, the shear grooves are formed in the prefabricated UHPC bridge deck slabs, high-strength bolt connecting pairs are arranged on the top plate of the LP steel main beam and are arranged in the shear grooves, and concrete is poured in the shear grooves.
2. The assembled UHPC-LP steel-concrete composite beam bridge capable of being disassembled quickly as claimed in claim 1, wherein: annular longitudinal steel bars and annular transverse steel bars are arranged in the prefabricated UHPC bridge deck and are connected with the transverse wet joint and the cast-in-place common concrete bridge deck in a staggered mode.
3. The assembled UHPC-LP steel-concrete composite beam bridge capable of being disassembled quickly as claimed in claim 1, wherein: the LP steel girder is formed by welding a steel top plate with equal thickness, a longitudinal thickening steel web plate and a longitudinal thickening steel bottom plate together.
4. The assembled UHPC-LP steel-concrete composite beam bridge capable of being disassembled quickly as claimed in claim 1, wherein: the high-strength bolt connecting pair is composed of a high-strength nut, a high-strength bolt, an embedded nut and a mounting nut, the high-strength bolt is fixed on the top plate of the LP steel main beam through the embedded nut and the mounting nut, and the high-strength nut is connected to the top of the high-strength bolt.
5. The construction method of the rapidly detachable assembled UHPC-LP steel-concrete composite girder bridge according to any one of the claims 1 to 4, characterized in that the construction method comprises the following steps:
step 1: the high-strength bolt is fixed at the designed position of the top plate of the LP steel girder through the embedded nut and the mounting nut;
step 2: prefabricating a UHPC bridge deck;
and step 3: hoisting the prefabricated UHPC bridge deck to the upper flange of the LP steel beam, and paying attention to the accurate position adjustment to avoid the collision of the steel bars in the slab with the high-strength bolts and the steel bars of the adjacent slabs;
and 4, step 4: pouring a cast-in-place common concrete bridge deck slab in the prefabricated UHPC bridge deck slab, pouring wet joints and supplementary shrinkage concrete in the shear grooves, and curing according to design requirements;
and 5: installing guardrails, expansion joints and auxiliary bridge deck pavement facilities;
step 6: when the bearing performance or service life of the bridge deck exceeds the standard requirement and needs to be removed and replaced, firstly removing auxiliary facilities such as guardrails, pavements and the like on the bridge deck, then removing concrete in wet joints, and unscrewing mounting nuts of the high-strength bolt connecting pairs to realize separation of the steel beams and the bridge deck; and (5) repeating the steps 3 to 5, and realizing replacement and installation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211272877.7A CN115573237A (en) | 2022-10-18 | 2022-10-18 | Quickly-detachable assembled UHPC-LP steel-concrete composite beam bridge and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211272877.7A CN115573237A (en) | 2022-10-18 | 2022-10-18 | Quickly-detachable assembled UHPC-LP steel-concrete composite beam bridge and construction method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115573237A true CN115573237A (en) | 2023-01-06 |
Family
ID=84585544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211272877.7A Pending CN115573237A (en) | 2022-10-18 | 2022-10-18 | Quickly-detachable assembled UHPC-LP steel-concrete composite beam bridge and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115573237A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116837667A (en) * | 2023-05-30 | 2023-10-03 | 安徽省交通规划设计研究总院股份有限公司 | Track bridge structure capable of being quickly constructed and composite connecting tenon reinforcement calculation method |
-
2022
- 2022-10-18 CN CN202211272877.7A patent/CN115573237A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116837667A (en) * | 2023-05-30 | 2023-10-03 | 安徽省交通规划设计研究总院股份有限公司 | Track bridge structure capable of being quickly constructed and composite connecting tenon reinforcement calculation method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204185755U (en) | A kind of Wavelike steel webplate post-stressed concrete T beam | |
| CN111206489A (en) | Assembled corrugated web steel box-UHPC (ultra high performance concrete) combined beam bridge and construction method | |
| CN110847007A (en) | Section steel-concrete composite beam hogging moment area structure based on high-performance material | |
| CN109440625B (en) | Steel-concrete combined continuous rigid frame steel truss bridge | |
| CN110846996A (en) | Construction method of continuous composite beam bridge and continuous composite beam bridge | |
| CN109024219B (en) | Prefabricated ultrahigh-performance concrete-common concrete combined beam bridge structure and construction method | |
| CN110607867A (en) | Non-dismantling mold laminated slab | |
| CN115573237A (en) | Quickly-detachable assembled UHPC-LP steel-concrete composite beam bridge and construction method thereof | |
| CN216516297U (en) | Superimposed shear wall concrete slab's connecting piece and superimposed shear wall | |
| CN108316164B (en) | Structure for reinforcing old assembled hollow slab girder bridge by using new girder and construction method | |
| CN108221636B (en) | Steel-concrete composite beam bridge constructed by adopting bracket-free scheme for midspan and bridge forming method | |
| CN109577169B (en) | Assembled concrete box girder structure based on steel structure transverse coupling system and construction method | |
| CN211340366U (en) | Continuous combined beam bridge | |
| CN212865473U (en) | Prefabricated assembled type lane plate | |
| CN214459554U (en) | Combined beam | |
| CN115233536A (en) | Light-weight assembled steel-UHPC (ultra high performance polycarbonate) composite beam and loading and unloading method thereof | |
| CN111305439A (en) | Laminated slab with disassembly-free die steel frame | |
| CN115748417A (en) | Corrugated steel web-segmented prestressed steel pipe concrete continuous combined bridge and construction method | |
| CN212077586U (en) | Detachable steel concrete composite structure bridge | |
| CN112523067A (en) | Combined beam | |
| CN114737462A (en) | Combined box girder structure and construction method thereof | |
| CN112921802A (en) | Profiled steel sheet-ultra-high toughness concrete combined bridge deck | |
| CN112878192A (en) | Assembled steel-ultra-high toughness concrete combined bridge deck | |
| CN211947879U (en) | Assembled corrugated web steel box-UHPC (ultra high performance concrete) combined beam bridge | |
| CN112921805A (en) | Assembled steel-coconut fiber magnesium phosphate cement bridge deck composite beam and construction method |
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 |