CN112391952A - Hoisting process of corrugated steel web of continuous rigid frame bridge - Google Patents
Hoisting process of corrugated steel web of continuous rigid frame bridge Download PDFInfo
- Publication number
- CN112391952A CN112391952A CN202011338203.3A CN202011338203A CN112391952A CN 112391952 A CN112391952 A CN 112391952A CN 202011338203 A CN202011338203 A CN 202011338203A CN 112391952 A CN112391952 A CN 112391952A
- Authority
- CN
- China
- Prior art keywords
- corrugated steel
- steel web
- web plate
- hole
- plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
Abstract
The embodiment of the invention relates to a hoisting process of a corrugated steel web of a continuous rigid frame bridge, which comprises the following steps: s1, mounting a No. 0 corrugated steel web plate on the pier top; s2, installing the corrugated steel web of the cast-in-place cantilever segment; and S3, installing the wave-shaped steel web plate of the closure section. By adopting the hoisting process of the corrugated steel web of the continuous rigid frame bridge, the quality control and the construction efficiency of the full bridge can be greatly improved.
Description
Technical Field
The invention relates to the technical field of bridge engineering, in particular to a hoisting process of a corrugated steel web of a continuous rigid frame bridge.
Background
At present, most of domestic continuous rigid frame bridges are still of reinforced concrete structures, the curing time is needed after the concrete web construction process, the construction progress is restricted to a certain extent, the self weight of concrete is larger, the requirements on the foundation and the substructure are higher, the deflection under the later-stage concrete is larger, and the quality control is not facilitated.
The novel composite structure bridge with the corrugated steel web plates instead of the common concrete box girder web plates has the advantages of light dead weight, good mechanical property and the like. However, the current method for installing corrugated steel webs in China is not complete.
Disclosure of Invention
In view of the above problems, the present invention has been made to provide a hoisting process of a corrugated steel web for a continuous rigid frame bridge, which overcomes or at least partially solves the above problems.
The hoisting process of the corrugated steel web of the continuous rigid frame bridge comprises the following steps:
s1 and pier top No. 0 corrugated steel web installation
Laying out control points at two ends of a corrugated steel web plate on the bottom die, and placing a lower support piece on a concrete cushion block of the bottom die according to the control points and fixedly connecting the lower support piece with a bottom plate steel bar;
hoisting and conveying the corrugated steel web plate to an installation position, and dropping the corrugated steel web plate on a fixed lower support piece for temporary lower support and fixation;
checking the verticality of the corrugated steel web, measuring the relative position of the corrugated steel web, and performing transverse temporary supporting and fixing after the verticality and the relative position meet the design requirements;
measuring and compounding the elevation of the corrugated steel web, and completely reinforcing the lower supporting piece after the elevation meets the design requirement;
fixedly connecting an opening plate of a corrugated steel web plate with a flange plate template support, and using a first inclined support member to brace the inner side of the corrugated steel web plate at a wave trough;
measuring the axial deviation of the corrugated steel web plate, and finely adjusting the corrugated steel web plate to ensure that the corrugated steel web plate is on the design axial line; the elevation of the front pile number position and the rear pile number position on the center line of the flange plate on the upper flange of the corrugated steel web plate is retested and adjusted to meet the design requirement;
determining the center line of the lower opening of the corrugated steel web plate according to the axis of the measurement lofting, and performing spot welding for temporary fixation; the inclined struts of the second inclined support members are used for resisting overturning at two sides of the corrugated steel web plate;
checking the verticality and the longitudinal slope of the corrugated steel web plate, reinforcing after adjusting to meet the design requirement, and transversely connecting the two corrugated steel web plates which are oppositely arranged by adopting a transverse connecting piece after the measurement and rechecking;
s2 installation of corrugated steel web of cast-in-place cantilever segment
After the top plate concrete is poured and the strength reaches more than 85%, the hanging basket moves forwards, the corrugated steel web plate to be installed is hung to the position of a No. 0 bridge deck, then the corrugated steel web plate to be installed is conveyed to the tail of the hanging basket by using a trolley, and the corrugated steel web plate to be installed is hung and conveyed to the installation position by using a lifting mechanism of the hanging basket;
temporarily fixing the corrugated steel web plate and the front section of corrugated steel web plate by using a fastener, finely adjusting the elevation and the axis of the lower opening of the corrugated steel web plate according to the designed elevation and the pre-lifting value, and performing lower support point tack welding temporary fixation and fastening the fastener between the corrugated steel web plate and the front section of corrugated steel web plate;
adjusting the axial position of an upper opening of the corrugated steel web, checking the verticality of the steel web and adjusting to meet the design requirement;
s3, installing the corrugated steel web of the closure section
Measuring the mileage and elevation of the corrugated steel webs on the two sides of the closure section, adjusting the positions of the corrugated steel webs on the two sides, determining the length of the corrugated steel webs on the closure section, and processing;
and (5) hoisting the closure section corrugated steel web.
Optionally, the lower support is a stool, and the foot of the lower support is welded with a steel plate foot pad.
Optionally, the first cross brace is a steel tube.
Optionally, the second diagonal support member is a jacking comprising a steel pipe and a screw rod.
Optionally, the cross-connecting member is a profile steel.
Optionally, the fastener is a bolted joint.
Optionally, the corrugated steel web is provided with through holes at equal intervals on a central line of the overlapping portion, the fastening piece penetrates through the through hole of the overlapping portion of the corrugated steel web and the corresponding through hole of the overlapping portion of the front section of the corrugated steel web, and the corrugated steel web and the front section of the corrugated steel web are fixed.
Optionally, the temporarily fixing the corrugated steel web and the front section corrugated steel web by using the fastener comprises the following steps:
in the process that the corrugated steel web plate is hoisted to the mounting position and is aligned with the hole of the front section corrugated steel web plate, the through hole at the upper part is aligned at the moment of coincidence, the tip of a crowbar is inserted into the through hole for aligning, the corrugated steel web plate is adjusted to align the through hole at the upper part with the through hole at the upper part of the front section corrugated steel web plate, and a punching nail penetrates into the through hole at the upper part;
at the moment of coincidence of the through holes in the middle, the tip end of a crowbar is inserted into the through hole and is straightened, the corrugated steel web plate is adjusted to enable the through hole in the middle to be aligned with the through hole in the middle of the front section of corrugated steel web plate, and a punching nail penetrates through the through hole in the middle;
longitudinally and transversely positioning the corrugated steel web plate and the front section of corrugated steel web plate, inserting the tip of a crowbar into the through hole to be aligned at the moment of coincidence of the through holes at the lower parts, adjusting the corrugated steel web plate to align the through hole at the lower part of the corrugated steel web plate with the through hole at the lower part of the front section of corrugated steel web plate, and mounting a bolt connecting pair; and then taking out the punching nail of the through hole in the middle and installing the bolt connecting pair, taking out the punching nail of the through hole in the upper part and installing the bolt connecting pair, and fastening after the bolt connecting pair is completely installed.
By adopting the hoisting process of the corrugated steel web of the continuous rigid frame bridge, the quality control and the construction efficiency of the full bridge can be greatly improved.
Detailed Description
The following detailed description describes embodiments of the present invention, which are exemplary in nature and are intended to be illustrative of the invention rather than limiting, and many variations, modifications, substitutions and alterations are possible, without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents, as will be appreciated by those of ordinary skill in the art.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Furthermore, the terms "comprises," "comprising," and any variations thereof, are intended to cover non-exclusive inclusions.
The hoisting process of the corrugated steel web of the continuous rigid frame bridge comprises the following steps of:
s1 and pier top No. 0 corrugated steel web installation
The installation of the pier top No. 0 corrugated steel web plate comprises the following substeps:
s101, lofting two end control points of a corrugated steel web on a bottom die so as to be convenient for rechecking during installation. And calculating the supporting height of the lower supporting piece according to the design size and the actually measured elevation of the control point of the working surface, and processing. In this embodiment, the lower support member is a split heads formed by assembling and welding steel bars, i-beams or channel steel, and the feet of the split heads are welded with steel plate foot pads.
And the lower supporting piece is placed on the concrete cushion block of the bottom die according to the control point so as to increase the contact area with the bottom plate, avoid concentrated stress and be fixedly connected with the bottom plate steel bars.
S102, hoisting the corrugated steel web to the installation position by using a tower crane, slowly dropping the corrugated steel web on the fixed lower supporting piece, and temporarily supporting and fixing the corrugated steel web.
S103, checking the verticality of the corrugated steel web by using a hanging hammer, measuring the relative position of the corrugated steel web by using a measuring tape, and performing transverse temporary support and fixation after the verticality and the relative position meet the design requirements.
And S104, measuring and compounding the elevation of the corrugated steel web by using a measuring instrument, and completely reinforcing the lower supporting piece after the elevation meets the design requirement.
S105, fixedly connecting the perforated plate of the corrugated steel web with the flange plate template support. The first inclined supporting piece, such as a steel pipe and an inclined strut, is arranged at the trough of the inner side of the corrugated steel web.
And S106, measuring the axis offset of the corrugated steel web by adopting a total station, and finely adjusting the corrugated steel web to ensure that the corrugated steel web is on the design axis. And (3) retesting the elevations of the front pile number position and the rear pile number position on the center line of the upper flange plate of the corrugated steel web plate, and adjusting the elevation of the corrugated steel web plate to meet the design requirement by adopting a tower crane, a 5t chain block and the like.
S107, determining the center line of the lower opening of the corrugated steel web according to the axis of the measurement lofting, and performing spot welding for temporary fixation; meanwhile, the second inclined support piece is used for resisting overturning at two sides of the corrugated steel web plate, so that the stability of the corrugated steel web plate is ensured. In this embodiment, the second inclined supporting member is a jacking device including a steel pipe and a screw rod.
And S108, checking the verticality and the longitudinal slope of the corrugated steel web plate by using the magnetic line weight, and reinforcing after adjusting to meet the design requirements, wherein the verticality can be adjusted by the second inclined supporting piece, and the longitudinal slope can be adjusted by the jack. After rechecking, a transverse connecting piece, such as 10# channel steel, is adopted to transversely connect two corrugated steel webs which are oppositely arranged and reinforce the corrugated steel webs so as to ensure the stability of the corrugated steel webs.
S2 installation of corrugated steel web of cast-in-place cantilever segment
The installation of the cast-in-cantilever segment corrugated steel web comprises the following substeps:
s201, after top plate concrete is poured and the strength reaches more than 85%, the hanging basket moves forwards, the corrugated steel web plate to be installed is hung to the position of a No. 0 bridge floor, the corrugated steel web plate to be installed is conveyed to the tail of the hanging basket by using a trolley, and the corrugated steel web plate to be installed is hung and conveyed to the installation position by using a lifting mechanism of the hanging basket;
s202, temporarily fixing the corrugated steel web plate and the front section corrugated steel web plate by using a fastener. In this embodiment, the fastener is a bolt connection pair. The wave-shaped steel web plates are provided with through holes at equal intervals on the central line of the lap joint part, such as 6 to 15 through holes at equal intervals, bolts penetrate through the through holes of the lap joint part of the wave-shaped steel web plates and the corresponding through holes of the lap joint part of the front section wave-shaped steel web plates, and the wave-shaped steel web plates and the front section wave-shaped steel web plates are fixed. Before construction, the bolt connecting pair needs to repair burrs, dirt and other factors influencing the pretensioning force of the bolt in the bolt hole.
Specifically, the temporary fixing of the corrugated steel web and the front section corrugated steel web by using the fastener comprises the following steps:
s2021, in the process that the corrugated steel web plate is hoisted to the mounting position and is aligned with the hole of the front section corrugated steel web plate, at the moment of coincidence of the through hole at the upper part, the tip of a crowbar is inserted into the through hole to be aligned, the corrugated steel web plate is slightly hoisted or hooked to align the through hole at the upper part of the corrugated steel web plate with the through hole at the upper part of the front section corrugated steel web plate, and a punching nail penetrates into the through hole at the upper part.
S2022, at the moment of coincidence of the through holes in the middle, inserting the tip of the crowbar into the through hole, aligning, adjusting the corrugated steel web plate to enable the through hole in the middle to be aligned with the through hole in the middle of the front section of corrugated steel web plate, and enabling the punching nail to penetrate through the through hole in the middle.
S2023, longitudinally and transversely positioning the corrugated steel web plate and the front section of corrugated steel web plate, inserting the tip of a crowbar into the through hole to be aligned at the moment of coincidence of the through hole at the lower part, adjusting the corrugated steel web plate to align the through hole at the lower part of the corrugated steel web plate with the through hole at the lower part of the front section of corrugated steel web plate, and mounting a bolt connecting pair; and then taking out the punching nail of the through hole in the middle and installing the bolt connecting pair, taking out the punching nail of the through hole in the upper part and installing the bolt connecting pair, and fastening after the bolt connecting pair is completely installed.
When the bolt is installed, the bolt can smoothly pass through the screw hole and can not be knocked in by force, the full bridge penetrating direction is consistent, and the axis of the bolt is perpendicular to the surface of the lap joint part.
According to the designed elevation and the pre-lifting value, the elevation and the axis of the lower opening of the corrugated steel web are finely adjusted by using an electric hoist or a jack, and the bolt connection pair of the lap joint part can be loosened if necessary. After the adjustment of the lower opening of the corrugated steel web plate is finished, the temporary fixing of lower support tack welding can be carried out by utilizing angle steel or reinforcing steel bars, and a bolt connecting pair between the corrugated steel web plate and the front section of corrugated steel web plate is fastened;
s203, adjusting the position of the upper opening axis of the corrugated steel web by using the chain block, and checking the verticality of the steel web by using the magnetic line weight and adjusting to meet the design requirement.
S3, installing the corrugated steel web of the closure section
S301, measuring the mileage and the elevation of the corrugated steel webs on the two sides of the closure section, adjusting the positions of the corrugated steel webs on the two sides, determining the length of the corrugated steel webs on the closure section, and processing.
And S302, hoisting the corrugated steel web of the closure segment, wherein the installation method of the corrugated steel web of the closure segment is the same as that of the corrugated steel web of the cast-in-place cantilever segment, and the detailed description is omitted. Hanging baskets are arranged on two sides of the closure section, one hanging basket is dismantled, and the other hanging basket runs.
By adopting the hoisting process of the corrugated steel web of the continuous rigid frame bridge, the quality control and the construction efficiency of the full bridge can be greatly improved.
Claims (8)
1. A hoisting process for a corrugated steel web of a continuous rigid frame bridge is characterized by comprising the following steps:
s1 and pier top No. 0 corrugated steel web installation
Laying out control points at two ends of a corrugated steel web plate on the bottom die, and placing a lower support piece on a concrete cushion block of the bottom die according to the control points and fixedly connecting the lower support piece with a bottom plate steel bar;
hoisting and conveying the corrugated steel web plate to an installation position, and dropping the corrugated steel web plate on a fixed lower support piece for temporary lower support and fixation;
checking the verticality of the corrugated steel web, measuring the relative position of the corrugated steel web, and performing transverse temporary supporting and fixing after the verticality and the relative position meet the design requirements;
measuring and compounding the elevation of the corrugated steel web, and completely reinforcing the lower supporting piece after the elevation meets the design requirement;
fixedly connecting an opening plate of a corrugated steel web plate with a flange plate template support, and using a first inclined support member to brace the inner side of the corrugated steel web plate at a wave trough;
measuring the axial deviation of the corrugated steel web plate, and finely adjusting the corrugated steel web plate to ensure that the corrugated steel web plate is on the design axial line; the elevation of the front pile number position and the rear pile number position on the center line of the flange plate on the upper flange of the corrugated steel web plate is retested and adjusted to meet the design requirement;
determining the center line of the lower opening of the corrugated steel web plate according to the axis of the measurement lofting, and performing spot welding for temporary fixation; the inclined struts of the second inclined support members are used for resisting overturning at two sides of the corrugated steel web plate;
checking the verticality and the longitudinal slope of the corrugated steel web plate, reinforcing after adjusting to meet the design requirement, and transversely connecting the two corrugated steel web plates which are oppositely arranged by adopting a transverse connecting piece after the measurement and rechecking;
s2 installation of corrugated steel web of cast-in-place cantilever segment
After the top plate concrete is poured and the strength reaches more than 85%, the hanging basket moves forwards, the corrugated steel web plate to be installed is hung to the position of a No. 0 bridge deck, then the corrugated steel web plate to be installed is conveyed to the tail of the hanging basket by using a trolley, and the corrugated steel web plate to be installed is hung and conveyed to the installation position by using a lifting mechanism of the hanging basket;
temporarily fixing the corrugated steel web plate and the front section of corrugated steel web plate by using a fastener, finely adjusting the elevation and the axis of the lower opening of the corrugated steel web plate according to the designed elevation and the pre-lifting value, and performing lower support point tack welding temporary fixation and fastening the fastener between the corrugated steel web plate and the front section of corrugated steel web plate;
adjusting the axial position of an upper opening of the corrugated steel web, checking the verticality of the steel web and adjusting to meet the design requirement;
s3, installing the corrugated steel web of the closure section
Measuring the mileage and elevation of the corrugated steel webs on the two sides of the closure section, adjusting the positions of the corrugated steel webs on the two sides, determining the length of the corrugated steel webs on the closure section, and processing;
and (5) hoisting the closure section corrugated steel web.
2. The hoisting process of the corrugated steel web of the continuous rigid frame bridge according to claim 1, characterized in that: the lower supporting piece is a split heads, and the foot of the lower supporting piece is welded with a steel plate foot pad.
3. The hoisting process of the corrugated steel web of the continuous rigid frame bridge according to claim 1, characterized in that: the first diagonal bracing member is a steel pipe.
4. The hoisting process of the corrugated steel web of the continuous rigid frame bridge according to claim 1, characterized in that: the second inclined supporting piece is a jacking support comprising a steel pipe and a screw rod.
5. The hoisting process of the corrugated steel web of the continuous rigid frame bridge according to claim 1, characterized in that: the transverse connecting piece is made of profile steel.
6. The hoisting process of the corrugated steel web of the continuous rigid frame bridge according to claim 1, characterized in that: the fastener is a bolt connecting pair.
7. The hoisting process of the corrugated steel web of the continuous rigid frame bridge according to claim 6, characterized in that: the wave-shaped steel web plates are provided with through holes at equal intervals on the central line of the lap joint part, the fasteners penetrate through the through holes of the lap joint part of the wave-shaped steel web plates and the corresponding through holes of the lap joint part of the front section of the wave-shaped steel web plates, and the wave-shaped steel web plates and the front section of the wave-shaped steel web plates are fixed.
8. The hoisting process of the corrugated steel web of the continuous rigid frame bridge according to claim 7, wherein the step of temporarily fixing the corrugated steel web and the front section of corrugated steel web by using the fasteners comprises the following steps:
in the process that the corrugated steel web plate is hoisted to the mounting position and is aligned with the hole of the front section corrugated steel web plate, the through hole at the upper part is aligned at the moment of coincidence, the tip of a crowbar is inserted into the through hole for aligning, the corrugated steel web plate is adjusted to align the through hole at the upper part with the through hole at the upper part of the front section corrugated steel web plate, and a punching nail penetrates into the through hole at the upper part;
at the moment of coincidence of the through holes in the middle, the tip end of a crowbar is inserted into the through hole and is straightened, the corrugated steel web plate is adjusted to enable the through hole in the middle to be aligned with the through hole in the middle of the front section of corrugated steel web plate, and a punching nail penetrates through the through hole in the middle;
longitudinally and transversely positioning the corrugated steel web plate and the front section of corrugated steel web plate, inserting the tip of a crowbar into the through hole to be aligned at the moment of coincidence of the through holes at the lower parts, adjusting the corrugated steel web plate to align the through hole at the lower part of the corrugated steel web plate with the through hole at the lower part of the front section of corrugated steel web plate, and mounting a bolt connecting pair; and then taking out the punching nail of the through hole in the middle and installing the bolt connecting pair, taking out the punching nail of the through hole in the upper part and installing the bolt connecting pair, and fastening after the bolt connecting pair is completely installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011338203.3A CN112391952A (en) | 2020-11-23 | 2020-11-23 | Hoisting process of corrugated steel web of continuous rigid frame bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011338203.3A CN112391952A (en) | 2020-11-23 | 2020-11-23 | Hoisting process of corrugated steel web of continuous rigid frame bridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112391952A true CN112391952A (en) | 2021-02-23 |
Family
ID=74607244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011338203.3A Pending CN112391952A (en) | 2020-11-23 | 2020-11-23 | Hoisting process of corrugated steel web of continuous rigid frame bridge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112391952A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000110114A (en) * | 1998-10-02 | 2000-04-18 | Ps Corp | Construction method for overhang-erected girder bridge using corrugated steel plate web and equipment for overhang erection work |
| CN105421249A (en) * | 2015-12-15 | 2016-03-23 | 中铁十四局集团第二工程有限公司 | Novel dragging- hoisting combined type hanging basket structure and construction method |
| CN105625195A (en) * | 2016-03-16 | 2016-06-01 | 河南大建桥梁钢构股份有限公司 | Novel SCC construction-method moving hanging basket for corrugated steel webs and construction method of hanging basket |
| CN107022960A (en) * | 2017-04-27 | 2017-08-08 | 中铁七局集团郑州工程有限公司 | The transport of continuous beam Wavelike steel webplate and installation method |
-
2020
- 2020-11-23 CN CN202011338203.3A patent/CN112391952A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000110114A (en) * | 1998-10-02 | 2000-04-18 | Ps Corp | Construction method for overhang-erected girder bridge using corrugated steel plate web and equipment for overhang erection work |
| CN105421249A (en) * | 2015-12-15 | 2016-03-23 | 中铁十四局集团第二工程有限公司 | Novel dragging- hoisting combined type hanging basket structure and construction method |
| CN105625195A (en) * | 2016-03-16 | 2016-06-01 | 河南大建桥梁钢构股份有限公司 | Novel SCC construction-method moving hanging basket for corrugated steel webs and construction method of hanging basket |
| CN107022960A (en) * | 2017-04-27 | 2017-08-08 | 中铁七局集团郑州工程有限公司 | The transport of continuous beam Wavelike steel webplate and installation method |
Non-Patent Citations (4)
| Title |
|---|
| 无: "浅析大跨度波形钢腹板连续梁施工技术", 《豆丁建筑》 * |
| 郑西铁路客运专线有限责任公司: "《郑西高速铁路工程总结》", 30 June 2011 * |
| 雷政等: "0号块波形钢腹板安装工艺流程控制", 《城市道桥与防洪》 * |
| 黎勇等: "波形钢腹板加工质量控制及悬臂安装技术浅谈", 《公路》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112663501B (en) | Upper-span existing line steel box girder structure and construction method | |
| CN108999085A (en) | Sea area construction of cast-in-situ box-beam bracket and sea area construction of cast-in-situ box-beam method | |
| CN107165056B (en) | Anti-overturning steel bar bracket for cantilever bent cap concrete pouring and mounting method thereof | |
| CN112324131B (en) | One-frame dual-purpose large-span stiff beam construction structure and construction method thereof | |
| CN107326812B (en) | Installation and positioning structure for No. 1 plate in No. 0 block of corrugated steel web bridge and operation method | |
| CN113186836A (en) | Construction method of brand-new prestress integral bridge falsework | |
| CN112391952A (en) | Hoisting process of corrugated steel web of continuous rigid frame bridge | |
| CN114086473B (en) | High pier cast-in-situ beam bracket and construction method thereof | |
| CN215482366U (en) | Double-line continuous beam bracket structure | |
| CN112049253B (en) | Truss body and concrete structure connecting node, truss and method | |
| CN115341701A (en) | High-altitude overhanging steel bar truss floor support plate hanging formwork construction method | |
| CN212077660U (en) | Large-span wide width bridge girder rhombus hanging basket construction structure | |
| CN113802468A (en) | Asymmetric cable-stayed bridge special-shaped concrete tower column construction process | |
| CN212532065U (en) | Gantry crane capable of being used in different height difference places | |
| CN114033204A (en) | Reconstruction construction method for existing single-column canopy | |
| CN115679814B (en) | Mounting method of assembly type 0# block bracket | |
| CN112538814A (en) | Construction process of transversely prefabricated and assembled corrugated steel web PC combined box girder for bridge construction | |
| CN110700102A (en) | Construction method of prestressed steel structure front-pull rear-lock cast-in-place platform | |
| CN115075530B (en) | Cantilever structure and construction method thereof | |
| CN115162165B (en) | Construction method for closing middle tower column of highway-railway dual-purpose river-crossing A-type cable-stayed bridge | |
| CN217298631U (en) | Pier side assembly type construction platform | |
| CN219909897U (en) | Liftable tower crane safety channel | |
| CN218621839U (en) | Steel-concrete joint section construction support system of hybrid beam cable-stayed bridge | |
| CN217325044U (en) | Cast-in-place crossbeam bracket of reassembling type | |
| CN208167490U (en) | The big box-beam structure of precast concrete with the connection of wet seam direction across bridge |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210223 |