CN112281646A - Back-mounted cantilever top plate wet joint structure of disassembly-free template for backbone beam bridge - Google Patents
Back-mounted cantilever top plate wet joint structure of disassembly-free template for backbone beam bridge Download PDFInfo
- Publication number
- CN112281646A CN112281646A CN202011190615.7A CN202011190615A CN112281646A CN 112281646 A CN112281646 A CN 112281646A CN 202011190615 A CN202011190615 A CN 202011190615A CN 112281646 A CN112281646 A CN 112281646A
- Authority
- CN
- China
- Prior art keywords
- top plate
- prefabricated
- cantilever arm
- wet
- wet joint
- 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
- E01D19/00—Structural or constructional details of bridges
- E01D19/06—Arrangement, construction or bridging of expansion joints
- E01D19/067—Flat continuous joints cast in situ
-
- 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 provides a dismounting-free template spine beam bridge rear-mounted cantilever arm top plate wet joint structure which is suitable for a spine beam bridge with a prefabricated composite section of a segment; the rear cantilever arm is a prefabricated concrete member assembled by sections and follows the construction time sequence of gradually erecting the finished core longitudinal beam; a rear-mounted cantilever top plate wet joint is arranged between the rear-mounted cantilever top plate and the core longitudinal beam; and a prefabricated bottom die is arranged at the position of a wet joint of the root part of the top plate of the prefabricated rear cantilever arm component. The invention can ensure that the rear-mounted cantilever arm sections of the spine beam with the composite section are reliably connected with the core longitudinal beam, the construction is convenient, the key technology of the design and construction of the section prefabricated and assembled concrete bridge is improved, and the development of the section beam prefabricated and assembled technology is promoted.
Description
Technical Field
The invention belongs to the technical field of bridge components and construction thereof, and particularly relates to a wet joint structure of a top plate of a rear cantilever arm of a backbone beam bridge without detaching a template.
Background
The segmental precast and assembled concrete bridge accords with the national industry development direction, has the advantages of environmental protection, small influence on environment and traffic, convenient transportation, quick construction, attractive appearance, durability, low whole life cost and the like, is widely popularized and applied in domestic railway, highway, rail transit and municipal engineering in recent years, and achieves good use effect.
At present, for a large prefabricated section box girder with a wider bridge deck, the transportation size and the hoisting weight restrict, a split type multi-box section is adopted in a conventional method, machines and tools of the scheme have high equipment investment, a pier top beam has high construction difficulty, the construction period is long, the construction cost is high, and the landscape effect is difficult to satisfy. In order to solve the difficult problems of transportation and construction of wide bridge section beams, the concept of a spine beam with a composite section is required to be provided, namely, a section is decomposed into a core longitudinal beam and a rear cantilever arm. Because the construction time sequence that the rear cantilever arm is erected step by step after the core longitudinal beam is formed is followed, the construction progress of the main stressed structure is not influenced by the installation of the cantilever arm, and the composite section spine beam is an efficient construction method at the same time.
Aiming at the structural characteristics and the construction method of the ridge beam with the composite section, a reliable top plate joint structure is required to be provided, and a reliable structural system is ensured to be formed by the cantilever arm sections and the core longitudinal beam, so that the ridge beam has the structural performance which is not inferior to that of the traditional cast-in-place beam. At present, the conventional prefabricated segment assembly can adopt two types of seam connection structures such as dry joint or wet joint. The wet splicing scheme has obvious advantages for the transverse splicing of the composite section backbone girder bridge, and the scheme ensures that the rear-mounted cantilever arm section does not need to be matched and prefabricated with the core longitudinal beam, ensures that the cantilever arm section can be conveniently and rapidly prefabricated in batches in a factory, and can better adapt to the complex conditions of ultrahigh gradual change, curve section and the like. Meanwhile, considering the wet joints of the top plate which are long in the longitudinal bridge direction, if the working procedures of erecting a large number of templates on the whole line, pouring the wet joints, and removing the templates after the maintenance is finished exist in a construction site, the construction efficiency and the construction quality are seriously restricted, and the high-altitude operation risk is greatly increased. Therefore, a solution for a factory-prefabricated wet-joint disassembly-free exterior formwork integrated with the cantilever arm member must be provided.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings of bottlenecks in the large-size section beam transportation and construction technology in the prior art, and provides a template-disassembly-free wet joint structure of a top plate of a rear cantilever arm of a backbone beam bridge, so that the aims of ensuring the reliable connection between the rear cantilever arm section of the composite section backbone beam and a core longitudinal beam, ensuring convenient construction, improving the design and construction key technology of a section prefabricated and assembled concrete bridge and promoting the development of the section beam prefabricated and assembled technology are fulfilled.
In order to achieve the purpose, the technical scheme of the invention is as follows: a dismounting-free formwork type wet joint structure for a top plate of a rear-mounted cantilever arm of a backbone girder bridge is suitable for a segmental prefabricated composite section backbone girder bridge and comprises a core longitudinal girder, a rear-mounted cantilever arm, a wet joint for a top plate of the rear-mounted cantilever arm, a prefabricated bottom die and a rear-mounted cantilever arm top plate; the rear cantilever arm is a prefabricated concrete member assembled by sections and follows the construction time sequence of gradually erecting the finished core longitudinal beam; a cast-in-place reinforced concrete joint, namely a rear-mounted cantilever top plate wet joint, is arranged between the rear-mounted cantilever top plate and the core longitudinal beam; and the prefabricated rear-installed cantilever arm component is provided with an integrated prefabricated concrete disassembly-free bottom die, namely a prefabricated bottom die, at the position of the wet joint of the root part of the top plate.
Further, in a factory prefabricating stage, the rear-mounted cantilever arm and the prefabricated bottom die are integrally cast together; in the field construction stage, after the core longitudinal beam part of the spine beam is finished, hoisting and installing prefabricated after-cantilever arm segments, including a prefabricated bottom die, and then quickly pouring wet joint concrete of a top plate without additionally erecting an outer template at the position; particularly, when the prefabricated bearing is arranged on the lower edge of the top plate of the core longitudinal beam, the cantilever arm section can be not provided with a prefabricated bottom die any more.
Further, the prefabricated bottom die is a reinforced concrete member prefabricated in a factory and is located on the bottom edge of the root portion of the top plate of the prefabricated cantilever arm section.
Furthermore, the side edge of the prefabricated bottom die is provided with a water stop rubber strip, so that the cantilever arm section is ensured to be closely attached to the core longitudinal beam after being hoisted, and slurry leakage in a concrete pouring link is avoided.
Further, the thickness of the prefabricated bottom die is not less than the total thickness of the diameter of the inner reinforcing mesh and the concrete protective layer; preferably, in order to avoid the weakening of the thickness of the prefabricated bottom die to the wet joint of the top plate and ensure the reliable force transmission of the top plate of the cantilever arm, the thicknesses of the wet joint of the top plate and the standard section of the prefabricated top plate are equal, meanwhile, a thickness gradual change section is designed and arranged at the joint of the prefabricated bottom die and the prefabricated top plate, and the edge of the thickness gradual change section forms an inclined slope surface.
Furthermore, the rear-loading cantilever arm top plate wet joint is positioned between the top plate of the prefabricated cantilever arm segment and the cantilever arm top plate of the core longitudinal beam (or a web plate of the core longitudinal beam) and is above a prefabricated bottom die (or a prefabricated bearer); the thickness of the wet joint does not exceed the thickness of the top plate, and preferably, the thickness of the top plate of the picking arm can be 0.8-1.0 times.
Furthermore, pre-embedded steel bars are reserved on the prefabricated arm-picking sections and the core longitudinal beam and respectively extend into the wet joint area, and after the prefabricated arm-picking sections are hoisted, wet joint concrete is poured.
Furthermore, ordinary concrete is poured into the wet joint, wherein the embedded steel bars are annular. Preferably, the wet joint is poured with high-performance concrete, and the embedded steel bars are linear short steel bars.
The invention provides a dismounting-free formwork spine beam bridge rear-mounted cantilever arm top plate wet joint structure, which has the following beneficial effects:
1. the invention ensures that the rear cantilever arm segment is reliably connected with the core longitudinal beam and the construction is convenient and fast through a reasonable top plate transverse wet joint structure, and a reliable composite section backbone beam system can be formed, so that the composite section backbone beam system has structural performance which is not inferior to that of the traditional cast-in-place beam, and the integral stress has obvious advantages compared with the currently widely adopted separated multi-box section.
2. The invention provides a concrete bottom die structure free of being dismantled, wherein a template and a cantilever arm section are integrally prefabricated in a factory, so that a large number of on-site template building and removing procedures are avoided, the on-site construction period can be greatly shortened, the construction quality is improved, and the high-altitude operation risk is reduced.
3. The wet joint and the prefabricated template structure thereof can flexibly combine various wet joint materials and external template structures, are convenient to match the specific requirements of various projects, are suitable for various bridges with complex sections, ultrahigh gradual change and curved sections, and have wide application prospect.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a cross-sectional view of the present invention;
FIG. 3 is a top view of the present invention;
FIG. 4 is a cross-sectional view of the present invention;
FIG. 5 is an exploded view of the cantilever-afterloaded composite section spinal bridge of the present invention;
FIG. 6 is a cross-sectional construction view of an example of an application of the present invention in which a pre-fabricated cantilever arm is connected to a core stringer web;
FIG. 7 is a cross-sectional view of an exemplary application of the core stringer top plate lower edge belt support of the present invention;
FIG. 8 is an example of the application of the wet top plate joint using normal concrete and steel ring bars according to the present invention;
fig. 9 shows an example of the application of the wet top plate joint of the present invention using high performance concrete and straight and short steel bars.
In the figure:
the device comprises a core longitudinal beam 1, a rear-mounted cantilever arm 2, a rear-mounted cantilever arm top plate wet joint 3, a prefabricated bottom die 4, a water-stop rubber strip 5, a prefabricated bearing 6, a thickness gradient section 7, a cantilever arm top plate 8, a cantilever arm ribbed plate 9, embedded steel bars 10, ordinary concrete 11 and high-performance concrete 12.
Detailed Description
In order to facilitate understanding of the invention, the invention will be described more fully and in detail with reference to the accompanying drawings and preferred embodiments, but the scope of the invention is not limited to the specific embodiments below.
Unless otherwise defined, all terms of art used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.
This embodiment employs a split-template-free backbone bridge rear cantilever arm top plate wet seam 3 configuration, as shown in the drawings. It is different from the prior art in that: the cantilever arm is a prefabricated concrete component assembled by the sections and follows the construction time sequence of gradually erecting the core longitudinal beam 1 after the core longitudinal beam is finished; a cast-in-place reinforced concrete joint (hereinafter referred to as a wet joint 3) is arranged between the rear-loading cantilever top plate 8 and the core longitudinal beam 1; and an integrated precast concrete disassembly-free bottom die (hereinafter referred to as a precast bottom die 4) is arranged at the position of a wet joint of the root part of the top plate of the post-installed precast cantilever arm 2 component.
In specific implementation, the rear-mounted cantilever arms 2 are lifted by a bridge crane, are mounted in pairs after the core longitudinal beams 1 form a continuous structure, and the top plates of the rear-mounted cantilever arms and the top plates of the core longitudinal beams 1 form an integral cross section by utilizing a seam structure to bear force together. 3 wide 550mm of wet seam, prefabricated die block 4 is for the prefabrication to choose arm roof 8 and core longeron to choose the arm roof and match each other and align, forms the wet seam and exempts from to tear open the die block structure.
The rear loading cantilever arm 2 is characterized in that: in the prefabrication stage of a factory, integrally pouring the prefabricated bottom die 4 together with the prefabricated bottom die; in the field construction stage, after the core longitudinal beam 1 of the backbone beam is partially finished, hoisting and installing the prefabricated cantilever arm 2 segment (containing the prefabricated bottom die 4), and then quickly pouring concrete of the wet joint 3 of the top plate without additionally erecting an outer template at the position; in particular, when the prefabricated bearing 6 is arranged on the lower edge of the top plate of the core longitudinal beam, the prefabricated bottom die 4 can not be arranged on the cantilever arm section.
During specific implementation, the concrete label of the prefabricated bottom die 4 is C55, the prefabricated cantilever arm 2 segment is installed by using a bridge crane, the prefabricated bottom die 4 of the prefabricated cantilever arm top plate 8 is in matched butt joint with the cantilever arm top plate of the core longitudinal beam 1, a wet joint area with an outer die needing not to be disassembled is formed, and therefore wet joint concrete pouring is conducted. Particularly, a prefabricated bearing 6 with the width of 650mm and the height of 200 mm-400 mm can be arranged on the lower edge of the cantilever top plate of the core longitudinal beam 1, and the cantilever top plate 8 is placed on the prefabricated bearing 6 and replaces the template function of the prefabricated bottom die 4.
Prefabricating a bottom die 4: the reinforced concrete members are prefabricated in factories and are positioned at the bottom edge of the root part of the prefabricated cantilever arm section top plate 8; preferably, the water stop rubber strip 5 is arranged on the side edge of the prefabricated bottom die 4, so that the cantilever arm section 2 is guaranteed to be closely attached to the core longitudinal beam 1 after being hoisted, and slurry leakage in a concrete pouring link is avoided.
In specific implementation, the prefabricated bottom die 4 is prefabricated together with the cantilever arm by adopting a rectangular cross section. The edge of the prefabricated bottom die 4 is provided with a 2cm water stop rubber strip 5, an interface is kept dry when the water stop rubber strip 5 is installed, floating slag, dust and sundries on the interface are removed before construction, and the water stop strip 5 is fixed at the installed position by using an adhesive or a high-strength anchor.
And (3) constructing the prefabricated bottom die 4: the thickness of the prefabricated bottom die 4 is not less than the diameter of the internal reinforcing mesh and the total thickness of the concrete protective layer; preferentially, in order to avoid the weakening of the thickness of the prefabricated bottom die 4 to the wet joint 3 of the top plate and ensure the reliable force transmission of the top plate of the cantilever arm, the thicknesses of the wet joint 3 of the top plate and the standard section of the top plate 8 of the cantilever arm are taken, meanwhile, the thickness gradual change section 7 is designed and arranged at the joint of the prefabricated bottom die 4 and the top plate 8 of the cantilever arm, and the edge forms an inclined slope surface.
When the concrete implementation, prefabricated die block 4 width is 550mm, and prefabricated die block 4 thickness is 40mm, and at prefabricated die block 4 and prefabricated arm roof 8 combination department of choosing, the roof is thick to be strengthened locally, by standard 230mm with 1: the ratio of 4 was thickened to 270 mm.
The wet seam construction: the prefabricated bottom die 4 (or the prefabricated support 6) is positioned between the top plate 8 of the prefabricated cantilever arm section and the cantilever arm top plate of the core longitudinal beam 1 (or a web plate of the core longitudinal beam); the thickness of the wet joint does not exceed the thickness of the picking arm top plate 8, and preferably, the thickness of the picking arm top plate 8 is 0.8-1.0 time.
In specific implementation, the thickness of the standard cantilever top plate 8 is 230mm, the thickness of the wet joint area top plate is thickened to 270mm, and the thickness of the bottom prefabricated bottom die 4 is removed, wherein the thickness of the wet joint is 230mm and is about 0.85 times of the thickness of the cantilever top plate 8.
And (3) constructing the wet joint: and pre-embedded steel bars 10 are reserved on the prefabricated cantilever arm 2 sections and the core longitudinal beam 1 and respectively extend into wet joint areas, and after the prefabricated cantilever arm 2 sections are hoisted, wet joint concrete is poured.
When the concrete implementation is carried out, the prefabricated cantilever arm 2 sections are lifted by a bridge deck crane, the position of the prefabricated cantilever arm 2 is locally adjusted, the prefabricated cantilever arm 2 and the embedded steel bars 10 of the core longitudinal beam 1 are aligned in a front-back staggered mode, long longitudinal steel bars are bound in the annular steel bars, and wet joint concrete pouring is carried out after binding is completed.
The wet joint material: ordinary concrete 11 is poured into the wet joint, and the embedded steel bars 10 are annular; preferably, the wet joint is poured with high-performance concrete 12, and the embedded steel bars 10 are linear short steel bars.
During specific implementation, the prefabricated cantilever top plate 8 and the core longitudinal beam 1 are both provided with HRB400 annular embedded steel bars 10 with the diameter of 12mm, the annular steel bars on the two sides are arranged in a close fit manner from front to back, and sufficient welding or lap joint length is ensured. The transverse spacing of the annular steel bars is 150mm, and after 6 HRB400 long longitudinal steel bars with the diameter of 10mm penetrate through the inner part of the ring, common concrete C55 is poured in the wet joint.
The foregoing is a more detailed description of the present invention in connection with specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific details set forth herein. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (12)
1. A post-installation cantilever arm top plate wet joint structure of a spine beam bridge of a non-dismantling template is suitable for a spine beam bridge with a composite section prefabricated by segments; the rear cantilever arm (2) is a prefabricated concrete member assembled by sections and follows the construction time sequence of gradually erecting the finished core longitudinal beam (1); a cast-in-place reinforced concrete joint, namely a rear-mounted cantilever top plate wet joint (3), is arranged between the rear-mounted cantilever top plate (8) and the core longitudinal beam (1); and an integrated precast concrete disassembly-free bottom die, namely a precast bottom die (4), is arranged at the position of a wet joint of the root part of the top plate of the precast rear cantilever arm member (2).
2. The demolition-free template post-erection cantilever arm top plate wet seam construction of claim 1 wherein: in the prefabrication stage of a factory, the rear-mounted cantilever arm (2) and the prefabricated bottom die (4) are integrally cast; in the field construction stage, after the core longitudinal beam (1) of the backbone beam is partially finished, hoisting and installing the prefabricated after-installing cantilever arm (2) segment containing the prefabricated bottom die (4), and then quickly pouring the wet joint concrete of the top plate without additionally erecting an outer template at the position.
3. The demolition-free template post-erection cantilever arm top plate wet seam construction of claim 2 wherein: when the prefabricated bearing (6) is arranged on the lower edge of the top plate of the core longitudinal beam (1), the prefabricated bottom die (4) can not be arranged on the segment of the rear-mounted cantilever arm (2).
4. The demolition-free template post-erection cantilever arm top plate wet seam construction of claim 1 wherein: the prefabricated bottom die (4) is a reinforced concrete member prefabricated in a factory and is positioned at the bottom edge of the root part of the top plate of the prefabricated cantilever arm (2) segment.
5. The demolition-free template post-erection cantilever arm top plate wet seam construction of claim 4 wherein: and a water-stopping rubber strip (5) is arranged on the side edge of the prefabricated bottom die (4) so that the segments of the rear-mounted cantilever arm (2) are closely attached to the core longitudinal beam (1) after being hoisted.
6. The post-erection cantilever arm top slab wet joint construction of the demolition-free formwork spine beam bridge of claim 1, wherein the thickness of the prefabricated bottom formwork (4) is not less than the total thickness of the inner reinforcing mesh diameter and the concrete protection layer.
7. The demolition-free template post-erection cantilever arm top plate wet seam construction of claim 6 wherein: after the prefabricated cantilever arm top plate is taken out, the wet joint (3) of the cantilever arm top plate and the prefabricated standard section of the cantilever arm top plate (8) are equal in thickness, meanwhile, a thickness gradual change section (7) is designed and arranged at the joint of the prefabricated bottom die (4) and the prefabricated cantilever arm top plate (8), and an oblique slope surface is formed at the edge.
8. The split-free formwork spine beam bridge rear cantilever top plate wet joint structure as claimed in claim 1, wherein the rear cantilever top plate wet joint (3) structure is located between the top plate (8) of the prefabricated cantilever segment and the cantilever top plate of the core longitudinal beam (1) or the web plate of the core longitudinal beam, and the prefabricated bottom die (4) or the prefabricated support (6) is located above; the wet seam thickness (3) does not exceed the top panel (8) thickness.
9. The knock-down template post-erection cantilever arm top plate wet-joint construction as claimed in claim 8, wherein the wet-joint thickness (3) is 0.8-1.0 times the thickness of the cantilever arm top plate (8).
10. The dismounting-free formwork type wet joint structure for the top plate of the rear cantilever arm of the backbone beam bridge is characterized in that embedded steel bars (10) are reserved on the prefabricated cantilever arm (2) sections and the core longitudinal beam (1) and respectively extend into wet joint areas, and after the prefabricated cantilever arm (2) sections are hoisted, wet joint concrete is poured.
11. The demolition-free formwork spine beam bridge rear cantilever arm top plate wet joint construction as claimed in claim 10, wherein the wet joint is cast with normal concrete (11), and wherein the embedded steel bars (10) are ring-shaped.
12. The demolition-free template post-erection cantilever arm top plate wet seam construction of claim 10 wherein: wherein, the wet joint is poured with high-performance concrete 12, and the embedded steel bars 10 are linear short steel bars.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011190615.7A CN112281646A (en) | 2020-10-30 | 2020-10-30 | Back-mounted cantilever top plate wet joint structure of disassembly-free template for backbone beam bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011190615.7A CN112281646A (en) | 2020-10-30 | 2020-10-30 | Back-mounted cantilever top plate wet joint structure of disassembly-free template for backbone beam bridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112281646A true CN112281646A (en) | 2021-01-29 |
Family
ID=74353297
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011190615.7A Pending CN112281646A (en) | 2020-10-30 | 2020-10-30 | Back-mounted cantilever top plate wet joint structure of disassembly-free template for backbone beam bridge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112281646A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113585036A (en) * | 2021-06-21 | 2021-11-02 | 中交二航局成都城市建设工程有限公司 | Small box girder with wet joint bottom die and construction method thereof |
-
2020
- 2020-10-30 CN CN202011190615.7A patent/CN112281646A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113585036A (en) * | 2021-06-21 | 2021-11-02 | 中交二航局成都城市建设工程有限公司 | Small box girder with wet joint bottom die and construction method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111778864B (en) | Bridge with longitudinal segmented prefabricated small box girder and construction method | |
| CN102154992B (en) | Dislocation installation method of corrugated steel web | |
| CN109457597B (en) | Flat plate type modular prefabricated hollow pier splicing structure and manufacturing method thereof | |
| CN108978434B (en) | Bracket-free industrialized construction method of steel-concrete combined continuous box girder bridge | |
| CN108060636B (en) | The construction method of overall assembled composite beam bridge | |
| CN112281633A (en) | Back-loading cantilever arm of spine beam bridge and longitudinal joint structure thereof | |
| CN110258289B (en) | Transverse width splicing structure of prestressed concrete continuous box girder bridge | |
| CN110792164B (en) | Transverse assembling device and method for assembled shear wall | |
| CN109024225A (en) | Ultra-high performance concrete truss arch blade unit, truss arch piece bridge and construction method | |
| CN108301545A (en) | A kind of big module overlapping contignation of the assembled with space truss temporary support | |
| CN111254800A (en) | Combined beam suitable for urban bridge and construction method thereof | |
| CN112281631A (en) | Segmental prefabricated composite section backbone bridge structure system | |
| CN110700103A (en) | Construction method of continuous composite beam | |
| CN113718632A (en) | Bent cap structure that segmentation prefabrication was assembled | |
| CN113481826A (en) | Prefabricated assembled corrugated steel web combination box girder | |
| CN110331649B (en) | Transverse joint system for prefabricated steel-concrete composite beam | |
| CN109024221A (en) | A kind of Novel steel combined box beam and its application method | |
| CN113789711A (en) | NC-UHPC combined assembly type prestressed concrete box girder, construction method and bridge thereof | |
| CN112281646A (en) | Back-mounted cantilever top plate wet joint structure of disassembly-free template for backbone beam bridge | |
| CN109098094A (en) | Construction method without bracket horizontal splicing corrugated steel web plate combined box girder | |
| CN212452316U (en) | Bridge with small box girders prefabricated in longitudinal sections | |
| CN211735002U (en) | Steel-concrete combined beam bridge capable of being installed quickly | |
| CN112281634A (en) | Rib plate hybrid connecting structure with supporting and rear cantilever arms of spine beam bridge | |
| CN217629396U (en) | UHPC-RC superposed wet joint structure and bridge thereof | |
| CN216919967U (en) | NC-UHPC combined assembly type concrete box girder and bridge thereof |
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 |