CN111041989A - Rapid installation method of prefabricated assembled bridge - Google Patents
Rapid installation method of prefabricated assembled bridge Download PDFInfo
- Publication number
- CN111041989A CN111041989A CN201911273340.0A CN201911273340A CN111041989A CN 111041989 A CN111041989 A CN 111041989A CN 201911273340 A CN201911273340 A CN 201911273340A CN 111041989 A CN111041989 A CN 111041989A
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- hoisting
- support
- lattice column
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to a method for quickly installing a prefabricated assembled bridge, which is characterized in that the transverse and vertical space distance is limited, the conventional hoisting mode cannot meet the field requirement, the method adopts a span-by-span withdrawing hoisting installation mode for hoisting, is restrained by the hoisting completion time, adopts a temporary lattice column support for system conversion, shortens the hoisting period, and comprises the following specific operation steps: construction preparation, cleaning of a bearing platform, hoisting of an upright column, assembling of a temporary lattice column support system, measurement of the elevation of the temporary lattice column support system, hoisting of a cover beam, grouting of the upright column and the cover beam, hoisting of a plate beam, hoisting of the next-span upright column, the cover beam and the plate beam, and dismantling of a support. The invention can greatly meet the requirement of rapid installation of the prefabricated part caused by limited space, and simultaneously, the installation of the lattice column support ensures the stability in the hoisting process of the structure, shortens the hoisting period of each span and ensures the target time of the construction period.
Description
Technical Field
The invention relates to a quick installation method of a prefabricated assembled bridge, in particular to a quick installation method of a prefabricated assembled bridge, which is used for a newly-built bridge and has the advantages of very limited or even very narrow construction operation space, limited vertical space distance and limited topographic conditions.
Background
At present, the reconstruction and expansion projects of urban bridges are increasing day by day, and the reconstruction, reconstruction and expansion projects of bridges in busy and downtown areas and urban sensitive areas are a large field where bridge construction cannot be seen in the future. The construction method is characterized in that reconstruction and expansion are carried out in the range of an original bridge, so that splicing of a new bridge and an old bridge is formed, and under the influence of peripheral important construction objects and pipeline protection requirements and under the condition that normal traffic is often required to be guaranteed for the existing bridge, the construction operation space of the newly-built bridge is very limited or even very narrow. The horizontal, vertical space distance of this engineering is limited, and the topography condition receives the restriction, consequently, need adopt to stride gradually and retreat to hoist the mode, adopts interim lattice column support in order to shorten the hoist and mount time simultaneously.
Disclosure of Invention
The invention provides a method for quickly installing a prefabricated assembled bridge, aiming at solving the technical problem of quickly installing the prefabricated assembled bridge, and the method can greatly meet the requirement of quickly installing prefabricated parts caused by limited space, and meanwhile, the stability of a structure in the hoisting process is ensured by installing a lattice column support, the hoisting period of each span is also shortened, and the target time of the construction period is ensured.
In order to achieve the purpose, the technical scheme of the invention is as follows: the utility model provides a prefabricated bridge quick installation method of assembling, receives the restriction in horizontal vertical direction spatial distance, and on-the-spot demand can not be satisfied to conventional hoist and mount mode, adopts and strides gradually to move back to hoist the mode of installation and hoist, receives the restraint of hoist and mount completion time simultaneously, adopts interim lattice column support to carry out the system conversion, shortens the hoist and mount cycle, and concrete operating procedure is in proper order: construction preparation, cleaning of a bearing platform, hoisting of an upright column, assembling of a temporary lattice column support system, measurement of the elevation of the temporary lattice column support system, hoisting of a cover beam, grouting of the upright column and the cover beam, hoisting of a plate beam, hoisting of the next-span upright column, the cover beam and the plate beam, and dismantling of a support.
Further, during the assembly of the temporary lattice column support system, the support is assembled by adopting standard parts, when the assembly height of the standard parts is not enough, the standard parts are connected in a welding mode, and the welding quality needs to be ensured during welding.
Further, the temporary lattice column support is installed on a poured bearing platform, the connection mode is that expansion bolts are used for connection, and after the support is dismantled, the expansion bolt holes are subjected to anti-corrosion treatment in a mortar plugging mode.
The beneficial results of the invention are: the hoisting of the members in the limited space can be met, the hoisting time is greatly shortened, and successful experience of the hoisting can guide type engineering construction.
Drawings
FIG. 1 is a schematic view of an occupied plane position of a back-hanging crane;
FIG. 2 is a schematic view of a temporary lattice column support;
fig. 3 is a cross-sectional view taken along a-a in fig. 2.
Detailed Description
Embodiments of the present invention are further illustrated below with reference to specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
The address of a newly-built bridge of the project is positioned between a subway No. 2 line and an S1 overhead, is limited by the distance between the subway No. 2 line and a transverse space and a vertical space, and can be hoisted only after the subway No. 2 line stops transporting at night.
The method for quickly installing the prefabricated assembled bridge is limited in transverse and vertical space distance, a conventional hoisting mode cannot meet the field requirement, the prefabricated assembled bridge is hoisted in a span-by-span retreating hoisting mode (shown in figure 1), meanwhile, the prefabricated assembled bridge is restrained by hoisting completion time, a temporary latticed column support (shown in figures 2 and 3) is used for system conversion, the hoisting period is shortened, and the specific operation steps are as follows: construction preparation, cleaning of a bearing platform, hoisting of an upright column, assembling of a temporary lattice column support system, measurement of the elevation of the temporary lattice column support system, hoisting of a cover beam, grouting of the upright column and the cover beam, hoisting of a plate beam, hoisting of the next-span upright column, the cover beam and the plate beam, and dismantling of a support.
And (3) carrying out support elevation control by adopting a total station in the process of erecting the temporary support, and ensuring that the cover beam erection elevation and the bridge deck elevation are matched with the design drawing. In the process of erecting the support, the upright post is connected with the hoop of the lattice column by utilizing the channel steel, so that the disturbance of the capping beam hoisting process to the pulp sitting at the bottom of the upright post is reduced.
1. Anticorrosion treatment for expansion bolt of bearing platform
Because the bearing platform is connected with the steel pipe upright post through the expansion bolts, the expansion bolts higher than the bearing platform surface are cut through a cutting machine after the support is dismantled, then the bolts are beaten to the position below the bearing platform surface through tools, and then the expansion bolt holes are plugged through mortar.
2. Pouring of support base stone
In order to accelerate the manufacturing speed of the on-site support and meet the strength requirement of the support, the cushion stone of the on-site support is poured by C100 grouting material, and the measurement of elevation data is emphasized in the pouring process, so that the bridge deck elevation meets the requirement of a design drawing after the plate girder is erected.
3. Welding requirements
During welding, the welding seam is required to be smooth, welding defects such as air holes and slag inclusion cannot be caused, and the defects are found and repaired in time. When intermittent welding is adopted, the length and the interval of the welding lines are uniform and consistent.
When the manufactured part requires sealed continuous welding, the phenomenon of air hole and sand hole at the welding seam is required not to occur. The height of the weld seam is required to be not less than the thickness of the base metal (weldment) during welding. When base materials (weldment) with different thicknesses are welded, the height of a welding seam cannot be smaller than the thickness of the thinnest base material (weldment).
4. Technical requirements for assembling and disassembling temporary supports
The connecting rod is assembled on site by the bolt in the support mounting process, after the stand column is mounted, the crane is used for hoisting and splicing, in the mounting process, the crane operator should be familiar with the environment, the information issued by commanders is noticed, and the collision with the pier stud in the support mounting process is avoided.
And (3) finishing the installation of the plate girder, cutting off top section steel, and after removing tie bars between the steel upright columns, conveying the steel support to the specified pier column position from the bottom of the plate girder by using a forklift or an excavator.
Claims (3)
1. The utility model provides a prefabricated bridge quick installation method of assembling, its characterized in that receives the restriction at horizontal vertical spatial distance, and conventional hoist and mount mode can not satisfy the on-the-spot demand, adopts to stride gradually to move back to hoist the mode of installation, receives the restraint of hoist and mount completion time simultaneously, adopts interim lattice column support to carry out the system conversion, shortens hoist and mount cycle, and concrete operating procedure is in proper order: construction preparation, cleaning of a bearing platform, hoisting of an upright column, assembling of a temporary lattice column support system, measurement of the elevation of the temporary lattice column support system, hoisting of a cover beam, grouting of the upright column and the cover beam, hoisting of a plate beam, hoisting of the next-span upright column, the cover beam and the plate beam, and dismantling of a support.
2. The method for quickly installing the prefabricated assembled bridge according to claim 1, wherein the method comprises the following steps: during interim lattice column mounting system assembles, the support adopts the standard component to assemble, and when the standard component was assembled highly inadequately, adopts the welded mode to connect, need guarantee welding quality during the welding.
3. The method for quickly installing the prefabricated assembled bridge according to claim 1, wherein the method comprises the following steps: the temporary lattice column support is installed on a poured bearing platform, the connection mode adopts expansion bolts for connection, and after the support is dismantled, the expansion bolt holes are subjected to anti-corrosion treatment in a mortar plugging mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911273340.0A CN111041989A (en) | 2019-12-12 | 2019-12-12 | Rapid installation method of prefabricated assembled bridge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911273340.0A CN111041989A (en) | 2019-12-12 | 2019-12-12 | Rapid installation method of prefabricated assembled bridge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111041989A true CN111041989A (en) | 2020-04-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911273340.0A Pending CN111041989A (en) | 2019-12-12 | 2019-12-12 | Rapid installation method of prefabricated assembled bridge |
Country Status (1)
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| CN (1) | CN111041989A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112900280A (en) * | 2021-02-02 | 2021-06-04 | 中铁四局集团第三建设有限公司 | Bridge prefabricated bent cap installation in-place construction method and construction structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112900280A (en) * | 2021-02-02 | 2021-06-04 | 中铁四局集团第三建设有限公司 | Bridge prefabricated bent cap installation in-place construction method and construction structure |
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Application publication date: 20200421 |
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| RJ01 | Rejection of invention patent application after publication |