CN113047158B - Temporary limiting device for steel truss multidirectional movable support under action of high mountain valley wind load - Google Patents
Temporary limiting device for steel truss multidirectional movable support under action of high mountain valley wind load Download PDFInfo
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- CN113047158B CN113047158B CN202110176902.0A CN202110176902A CN113047158B CN 113047158 B CN113047158 B CN 113047158B CN 202110176902 A CN202110176902 A CN 202110176902A CN 113047158 B CN113047158 B CN 113047158B
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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
- E01D19/00—Structural or constructional details of bridges
- E01D19/04—Bearings; Hinges
- E01D19/042—Mechanical bearings
Abstract
The invention discloses a temporary limiting device for a steel truss girder multidirectional movable support under the action of wind load of high mountain gorges, which comprises a support base stone, wherein a base is fixedly arranged on the support base stone, the base supports a support through support columns, a plurality of vertical limiting brackets are arranged around the support in an abutting mode and are arranged on horizontal double-spliced I-shaped steel, the horizontal double-spliced I-shaped steel is fixedly arranged on the support base stone, and inclined struts are further arranged on the horizontal double-spliced I-shaped steel and are used for supporting the vertical limiting brackets so as to improve the strength of the vertical limiting brackets. The temporary limiting device for the multidirectional movable support of the steel truss girder is applied to the multidirectional movable support of a bridge, so that the steel truss girder does not move under the action of transverse bridge wind load, and the safety of cantilever erection of the steel truss girder is ensured.
Description
Technical Field
The invention belongs to the field of bridge engineering design, and particularly relates to a temporary limiting device for a steel truss multidirectional movable support under the action of wind load of a high mountain valley.
Background
Most of large-span railway bridges in mountainous areas are suspension bridges and cable-stayed bridges, the construction difficulty of the cable structure is high, and the later maintenance cost is high. The large-span continuous steel truss girder structure is increasingly applied to mountainous bridges, the steel structure material is light in weight, high in strength, large in spanning capacity and good in plasticity and toughness, and the large-span continuous steel truss girder structure has great advantages in bridges spanning rivers, valleys and existing lines.
The construction of the steel truss girder structure can generally adopt suspension cable tower cantilever erection and support method cantilever erection according to the construction site conditions. When foundation conditions permit and the cantilever erection is carried out by adopting a support method, the construction scheme is more economical and safe due to the fact that the height of the support and the wind load effect are smaller, and the erection method can be widely popularized, and the known grand bridge which adopts the support method to erect and splice the bridge is provided with: yujian railway Yuanjiang grand bridge, chenghui railway Wutong Minjiang grand bridge, xiamen railway Yangjiang grand bridge and the like.
The Yuanjiang iron road Yangjiang super bridge adopts a (108 +151.5+249+151.5+ 108) m through-put type continuous steel truss girder structure, the total length of the steel truss girder is 768m, and the total weight is about 20188t, so that the method is the first construction of a large-span through-put type continuous steel truss girder iron road bridge in China. The span 249m is striden mainly, and the purlin height is by 16m gradual change to 36m, main mound height 154m, and bridge structures height 203m, above index all are in the first place in the world railway bridge construction field.
The Yuanjiang grand bridge spans the deep cut valley of the red river, adopts a support method for bidirectional symmetrical cantilever erection construction, and finally closes the river in the midspan. The high slope steep ditch of the mountain of erection site is deep, and the topography and land features are complicated, and the construction degree of difficulty is huge, and the full-bridge sets up 11 steel supports, and wherein secondary side span (span 151.5 meters) only sets up 110m and 130 m's super high interim buttress in mid point position department, and the steel truss is 220 meters apart from the red river surface of water, and the structure receives canyon wind load effect obvious. The length of the secondary side span cantilever reaches 81 meters, and large eccentricity and rotation angle are generated at the position of the ultrahigh pier fulcrum, so that the problem of coping in the cantilever erection construction by a support method is solved.
An adult railway five-way regaining grand bridge adopts (140m +224m + 140m) through-type continuous steel truss structure, a main bridge adopts a variable-truss-height double-main-truss continuous steel truss structure form, double main trusses are 2N-type and K-type combined trusses, the truss width is 14m, the lower chord adopts a variable-section design, the side span end part and the mid-span truss height are 16m, the mid-fulcrum truss height is 32m, the internode length is 14m, the total 36 internodes of a full bridge weigh about 12600 tons.
The five-way Minjiang grand bridge of the adult railway crosses Minjiang at 1.63 kilometers upstream of the built Happy five-way Minjiang highway grand bridge of the general traffic, the construction of building an island, a steel trestle and an auxiliary support is completed in the early stage of erection, 12 temporary steel supports are arranged in the full bridge, the construction of bidirectional symmetrical cantilever erection by adopting a support method is adopted, and finally the cross-center closure is realized.
A steel truss flexible arch (110m +220m + 110m) adopted by a Yangjiang grand bridge of a deep railway of a building is a key control project of the deep railway of the building, the total weight of the steel truss of a main bridge is about 16000 tons, and the steel truss is erected by a cantilever by adopting a support method and finally joined in a midspan.
The cantilever erection is carried out by adopting a support method, and when the temporary pier is used for suspension splicing, the steel beam is downwarped to cause eccentric stress, so that the main and auxiliary structures are not favorable. Specifically, when the cantilever is erected by a support method, the cantilever end of the steel truss girder generates an eccentric bending moment and a corner at a support supporting position, and the problems of uneven vertical force transmission and local stress concentration caused by eccentricity and the corner need to be considered for the mat lifting device of the support.
The steel truss girder of the super bridge has large structural size, the structural size is greatly changed along with the temperature difference between day and night, the temperature stress is released in consideration of the design of the support, the basic principle is that only one part restricts longitudinal deformation, and only one side of the upstream and the downstream restricts transverse deformation. Because the transverse wind load effect of the steel truss girder structure of the super bridge is obvious, when the permanent support is used for carrying out cushion lifting on the main pier, the friction force caused by the support reaction force is ensured to be larger than the wind load effect, and the longitudinal deformation is avoided. This application designs one set of steel longeron stop device, both can release the steel longeron and warp along the bridge to the temperature, can offset the effect of the horizontal bridge of bridge to wind load again.
Disclosure of Invention
Aiming at the defects in the prior art, the temporary limiting device for the multidirectional movable support of the steel truss girder under the action of the wind load of the high mountain canyon is provided.
The specific technical scheme of the invention is as follows:
temporary stop device of steel longeron multidirectional movable support under high mountain gorge wind load effect, including the support base stone, fixed mounting base on the support base stone, the base passes through the support column and supports the support the conflict all around of support is laid a plurality of vertical spacing brackets, and a plurality of vertical spacing brackets are installed on the two I-steel that piece together of level, the two I-steel fixed mounting that pieces together of level is in on the support base stone, still install the bracing on the two I-steel that pieces together of level and be used for supporting vertical spacing bracket is in order to improve the intensity of vertical spacing bracket.
As a preferred technical scheme, the inclined strut is welded on the horizontal double-spliced I-shaped steel.
As the preferred technical scheme, the number of the vertical limiting brackets is four.
As the preferred technical scheme, two by two of four vertical spacing brackets form a component and establish the both sides of support, and about support geometric centre symmetry.
According to the technical scheme, the upper end of the base is padded with the battens, then the horizontal double-spliced I-shaped steel is hoisted to the base to prevent the stainless steel sliding surface of the support from being scratched, the horizontal double-spliced I-shaped steel is moved to enable a stop block on one side below to be tightly attached to the side surface of the support cushion stone, and then another stop block is welded to the other side surface of the support cushion stone in a tightly attached mode to enable the horizontal double-spliced I-shaped steel to be tightly clamped with the support cushion stone.
As a preferred technical scheme, the length of the horizontal double-spliced I-shaped steel is 3500-4000 mm.
As a preferred technical scheme, the thickness of the vertical limiting bracket is 18-25 mm.
As the preferred technical scheme, a plurality of vertical limiting brackets are welded on the horizontal double-spliced I-shaped steel to form a box shape.
Has the advantages that:
the temporary limiting device for the multidirectional movable support of the steel truss girder is applied to the multidirectional movable support of a bridge, so that the steel truss girder does not move under the action of transverse bridge wind load, and the safety of cantilever erection of the steel truss girder is ensured.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a schematic view of the temporary support transverse limiting locking of the temporary support limiting device for the multi-directional movable support of the steel truss under the action of the wind load of the high mountain canyon in the embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, back, 8230; \8230;) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the figure), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes 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 at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention will now be further described with reference to the accompanying drawings.
As shown in fig. 1, the embodiment of the invention relates to a temporary limiting device for a steel truss multidirectional movable support under the action of wind load of a high mountain canyon, which comprises a support cushion stone 1, wherein a base 2 is fixedly installed on the support cushion stone 1, the base 2 supports a support 4 through a support column 3, a plurality of vertical limiting brackets 5 are arranged around the support 4 in an abutting mode, the vertical limiting brackets 5 are installed on a horizontal double-spliced i-shaped steel 6, the horizontal double-spliced i-shaped steel 6 is fixedly installed on the support cushion stone 1, and inclined struts 7 are further installed on the horizontal double-spliced i-shaped steel 6 and used for supporting the vertical limiting brackets 5 so as to improve the strength of the vertical limiting brackets 5.
In the embodiment of the invention, the tool for temporarily locking the multidirectional movable support of the steel truss girder is formed by welding thick steel plates with the horizontal direction of double-spliced I20I-shaped steel, the length of the double-spliced I20I-shaped steel is 3900mm, the vertical direction and the oblique direction of the double-spliced I20I-shaped steel into box-shaped components, and assembling and welding the box-shaped components into a whole on site.
The preparation method of the limiting device comprises the following steps:
(1) The method comprises the following steps of welding a horizontal double-spliced I-shaped steel and a stop block on one side in a steel beam assembly plant, blanking steel plates according to the drawing size, and welding into a box-shaped component.
(2) The horizontal I-steel is hoisted to the lower seat plate of the support, the middle of the horizontal I-steel is padded with the batten, the stainless steel sliding surface of the support is prevented from being scratched, the horizontal double-spliced I-steel is moved to enable a stop block on one side below to be tightly attached to the side surface of the support cushion stone, and then another stop block is welded on the other side surface tightly attached to the support cushion stone, so that the horizontal double-spliced I-steel is tightly clamped with the support cushion stone.
(3) The vertical box-type check block is arranged close to the side face of the upper seat plate of the support, the bottom of the vertical box-type check block is welded with the horizontal I-shaped steel, and then the inclined strut is welded to limit the transverse bridge movement of the upper seat plate of the support.
(4) And small stiffening plates are welded at the roots of the horizontal stop blocks and the box-shaped stop blocks.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (2)
1. Temporary stop device of multidirectional movable support of steel longeron under mountain gorge wind load effect, including the support stone, fixed mounting base on the support stone, the base passes through the support column and supports support, its characterized in that: four vertical limiting brackets are arranged around the support in an abutting mode and are installed on horizontal double-spliced I-shaped steel, the horizontal double-spliced I-shaped steel is fixedly installed on the support base cushion stone, and an inclined strut is further installed on the horizontal double-spliced I-shaped steel and used for supporting the vertical limiting brackets so as to improve the strength of the vertical limiting brackets;
four vertical limiting brackets are welded on the horizontal double-spliced I-shaped steel to form a vertical box-shaped stop block;
a batten is laid on the upper end of the base, then the horizontal double-spliced I-steel is hoisted to the base to prevent the stainless steel sliding surface of the support from being scratched, the horizontal double-spliced I-steel is moved to enable the vertical box-shaped stop block on one side below to be tightly attached to the side surface of the support cushion stone, then the vertical box-shaped stop block on the other side is welded to the other side surface of the support cushion stone in a tightly attached mode, and the horizontal double-spliced I-steel is tightly clamped with the support cushion stone;
the vertical box-type stop block is arranged close to the side face of the upper seat plate of the support, the bottom of the vertical box-type stop block is welded with the horizontal double-spliced I-shaped steel, and then the inclined strut is welded to limit the transverse bridge movement of the upper seat plate of the support;
two liang formation components of four vertical spacing brackets are established the both sides of support, and about the geometric centre symmetry of support.
2. The temporary limiting device for the multidirectional movable support of the steel truss girder under the wind load of the high mountain canyon as claimed in claim 1, wherein: the length of the horizontal double-spliced I-shaped steel is 3500 to 4000mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110176902.0A CN113047158B (en) | 2021-02-07 | 2021-02-07 | Temporary limiting device for steel truss multidirectional movable support under action of high mountain valley wind load |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110176902.0A CN113047158B (en) | 2021-02-07 | 2021-02-07 | Temporary limiting device for steel truss multidirectional movable support under action of high mountain valley wind load |
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| CN113047158A CN113047158A (en) | 2021-06-29 |
| CN113047158B true CN113047158B (en) | 2023-02-24 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001295499A (en) * | 2000-04-17 | 2001-10-26 | Oiles Ind Co Ltd | Base isolation mechanism for structure |
| CN101117790A (en) * | 2007-08-22 | 2008-02-06 | 中铁大桥局股份有限公司 | Closure method of large-span continuous steel truss arch |
| CN202577156U (en) * | 2012-04-09 | 2012-12-05 | 中交一公局厦门工程有限公司 | Device used to temporarily fix ball support and corresponding bearing carrier |
| CN104805764A (en) * | 2015-05-06 | 2015-07-29 | 西南交通大学 | Bidirectional-limiting unidirectional-movement basin-type rubber support |
| CN110820598A (en) * | 2019-12-05 | 2020-02-21 | 中国铁建大桥工程局集团有限公司 | Longitudinal limiting and pushing device for three-main-truss double-layer steel truss arch bridge steel beam |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208917714U (en) * | 2018-12-26 | 2019-05-31 | 柳州欧维姆工程有限公司 | A kind of jacking counterforce device for fabricated T beam bridge bearing replacement |
-
2021
- 2021-02-07 CN CN202110176902.0A patent/CN113047158B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001295499A (en) * | 2000-04-17 | 2001-10-26 | Oiles Ind Co Ltd | Base isolation mechanism for structure |
| CN101117790A (en) * | 2007-08-22 | 2008-02-06 | 中铁大桥局股份有限公司 | Closure method of large-span continuous steel truss arch |
| CN202577156U (en) * | 2012-04-09 | 2012-12-05 | 中交一公局厦门工程有限公司 | Device used to temporarily fix ball support and corresponding bearing carrier |
| CN104805764A (en) * | 2015-05-06 | 2015-07-29 | 西南交通大学 | Bidirectional-limiting unidirectional-movement basin-type rubber support |
| CN110820598A (en) * | 2019-12-05 | 2020-02-21 | 中国铁建大桥工程局集团有限公司 | Longitudinal limiting and pushing device for three-main-truss double-layer steel truss arch bridge steel beam |
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| CN113047158A (en) | 2021-06-29 |
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