CN114541241A - Anti-cracking structure for box girder in girder storage period - Google Patents
Anti-cracking structure for box girder in girder storage period Download PDFInfo
- Publication number
- CN114541241A CN114541241A CN202210025151.7A CN202210025151A CN114541241A CN 114541241 A CN114541241 A CN 114541241A CN 202210025151 A CN202210025151 A CN 202210025151A CN 114541241 A CN114541241 A CN 114541241A
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- Prior art keywords
- box girder
- support
- girder
- roof beam
- web
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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
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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
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
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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
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
Abstract
The invention relates to an anti-cracking structure of a box girder in a girder storage period, which comprises the box girder and a support, wherein a supporting cavity is formed in the box girder, a web plate is arranged in the supporting cavity, and the plane of the web plate is parallel to the width direction of the box girder; the number of the support seats is at least three, the at least three support seats are arranged on one side surface of the box girder facing the ground, the positions of the three support seats on the box girder can form a triangle, and the position of one support seat on the box girder is located in the plane of the web plate. The web can provide support for the cavity structure of the box girder in the support cavity. On the side of case roof beam towards ground, the position that the plane of web place corresponds sets up the support, further provides stable support and protection for case roof beam overall structure. Wherein three support encloses into triangle-shaped and guarantees the atress safety of case roof beam during depositing the roof beam, avoids producing the crack of existence roof beam period, can also reduce the deformation of depositing the roof beam period simultaneously, and then reduces the butt joint degree of difficulty when the case roof beam hoists.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to an anti-cracking structure of a box girder in a girder storage period.
Background
With the rapid development of social economy and modern construction, the rapid construction of bridge construction becomes one of the main problems faced at present. In order to meet the requirements of rapid and industrialized bridge construction, the segment box girder prefabrication and assembly technology is developed at the same time, and is widely accepted in the construction fields of all countries in the world. The segment box girder prefabrication and assembly technology can save the construction period, reduce the influence on the existing traffic, effectively ensure the construction quality and improve the construction level of the bridge, and becomes one of the main construction methods of the bridge at present.
The wide application of the prefabricated section box girder assembly technology enables bridge construction to be simple and rapid, but a series of problems are brought at the same time. Along with the increase of the current traffic volume, the width of the bridge is also wider and wider, and when the wide prefabricated section box girder adopts the conventional girder storage scheme, namely beam storage supports are arranged at the side webs on the two sides of the section box girder for storing the girder, the section box girder is easy to crack in the girder storage period due to the larger span of the wide prefabricated section box girder.
Disclosure of Invention
Therefore, it is necessary to provide a structure for preventing the box girder from cracking during the girder storage period, in order to solve the problem that the box girder is prone to cracking during the girder storage period.
A box girder anti-cracking structure in a girder storage period comprises a box girder and a support, wherein a supporting cavity is formed in the box girder, a web plate is arranged in the supporting cavity, and the plane where the web plate is located is parallel to the width direction of the box girder; the number of the support seats is at least three, the at least three support seats are arranged on one side surface of the box girder facing the ground, the positions of the three support seats on the box girder can form a triangle, and the position of one support seat on the box girder is located in the plane of the web plate.
In one embodiment, the length of the support ranges from 50cm to 70 cm; the width range of the support is 20 cm-40 cm; the height range of the support is 10 cm-30 cm.
In one embodiment, the contact area of the support and the box girder is larger than or equal to 1800cm2。
In one embodiment, the support is rectangular in shape.
In one embodiment, three of the seats can enclose an isosceles triangle.
In one embodiment, the three supports are respectively a main support and two auxiliary supports, the main support is located on the box girder in the plane where the web is located and is arranged close to the side where one long side of the box girder is located, the two auxiliary supports and the main support are arranged at intervals and enclose a triangle, and the two auxiliary supports are arranged close to the side where the other long side of the box girder is located.
In one embodiment, the width of the primary abutment is less than the thickness of the web.
In one embodiment, the width of the main support is 8cm to 10cm smaller than the thickness of the web.
In one embodiment, the distance from the main support to one long side of the box girder is greater than or equal to 20 cm.
In one embodiment, the distance from the secondary support to the other long side of the box girder is less than or equal to one quarter of the width of the box girder.
In one embodiment, the distance from the secondary support to the other long side of the box girder is 20 cm-22 cm smaller than one fourth of the width of the box girder.
Above-mentioned case roof beam is deposited stage and is prevented cracked structure, the web can provide the support for the cavity structure of case roof beam in the support cavity. On the side of case roof beam towards ground, the position that the plane of web place corresponds sets up the support, further provides stable support and protection for case roof beam overall structure. Wherein three support encloses into triangle-shaped and guarantees the atress safety of case roof beam during depositing the roof beam, avoids producing the crack of existence roof beam period, can also reduce the deformation of depositing the roof beam period simultaneously, and then reduces the butt joint degree of difficulty when the case roof beam hoists.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a front view of a girder shelf life crack prevention structure of a box girder in one embodiment;
fig. 2 is a top view of the girder storage period crack prevention structure of the box girder in the embodiment of fig. 1.
The elements in the figure are labeled as follows:
10. the box girder is provided with an anti-cracking structure in the girder storage period; 100. a box girder; 110. a support cavity; 120. a web; 200. a support; 210. a main support; 220. and a secondary support.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
Referring to fig. 1 and 2, the crack prevention structure 10 for the beam storage period of the box girder in one embodiment includes a box girder 100 and a support 200, wherein a support cavity 110 is formed in the box girder 100, a web 120 is arranged in the support cavity 110, and a plane of the web 120 is parallel to a width direction of the box girder 100; the number of the supporting bases 200 is at least three, at least three supporting bases 200 are arranged on one side surface of the box girder 100 facing the ground, the positions of three supporting bases 200 on the box girder 100 can form a triangle, and the position of one supporting base 200 on the box girder 100 is located in the plane of the web 120.
The web 120 can provide support for the cavity structure of the box girder 100 within the support cavity 110. On the side of the box girder 100 facing the ground, a support 200 is provided at a position corresponding to the plane of the web 120, further providing stable support and protection for the whole structure of the box girder 100. The three supports 200 form a triangle to ensure the stress safety of the box girder 100 during the girder storage period, avoid the crack during the girder storage period, and simultaneously reduce the deformation during the girder storage period, thereby reducing the butt joint difficulty during the hoisting of the box girder 100.
The box girder is one of the middle girders in bridge engineering, the inner part of the box girder is hollow, and flanges are arranged on two sides of the upper part of the box girder and are similar to a box, so that the box girder is named. Single boxes, multiple boxes, etc. The box girder of the reinforced concrete structure is divided into a prefabricated box girder and a cast-in-place box girder. The box girder prefabricated in the independent site can be erected after the lower project is finished by combining the bridge girder erection machine, so that the project progress can be accelerated, and the construction period can be saved; cast-in-place box girders are mostly used for large continuous bridges. The common materials are divided into two types, namely a prestressed reinforced concrete box girder and a steel box girder. The prestressed reinforced concrete box girder is constructed on site, and transverse prestress is also arranged in some cases besides longitudinal prestress; the steel box girder is generally processed in a factory and then transported to a site for installation, and has an all-steel structure and a partially reinforced concrete pavement layer. The wide application of the prefabricated section box girder assembly technology enables bridge construction to be simple and rapid, but a series of problems are brought at the same time. Along with the increase of the current traffic volume, the width of the bridge is also wider and wider, and when the wide prefabricated section box girder adopts the conventional girder storage scheme, namely beam storage supports are arranged at the side webs on the two sides of the section box girder for storing the girder, the section box girder is easy to crack in the girder storage period due to the larger span of the wide prefabricated section box girder. The box girder 100 in this embodiment is a single-box dual-chamber prefabricated segment box girder 100. However, the protection structure in this embodiment is not limited to be applied to the single-box double-chamber prefabricated section box girder 100, and is also applicable to other types of box girders 100.
In one embodiment, the length of the support 200 ranges from 50cm to 70 cm; the width range of the support 200 is 20 cm-40 cm; the height range of the support 200 is 10 cm-30 cm. In the present embodiment, the support 200 has a length, width and height of 60cm × 30cm × 20 cm. The support 200 may also have a length, width and height of 65cm × 35cm × 25 cm. The specification of the support 200 can be adjusted according to actual construction needs.
Further, the contact area of the support 200 and the box girder 100 is 1800cm or more2. The contact area between the support 200 and the box girder 100 should be ensured to be not less than 1800cm2So that the stand 200 can provide stable support to the box girder 100. The contact area between the support 200 and the box girder 100 needs to be adjusted more specifically than the box girder 100, and may be 2000cm2Or 3000cm2. In this embodiment, the box girder 100 is a wide single-box double-chamber prefabricated section box girder 100, and therefore, it is required to satisfy not less than 1800cm2The contact area of (a).
In one embodiment, the support 200 is rectangular in shape. The shape of the support 200 includes, but is not limited to, a rectangular shape, and the support 200 should be shaped to provide stable support for the box girder 100 on the ground while ensuring that the contact area between the support 200 and the box girder 100 is 1800cm or more2. Thus, the shape of the holder 200 may be rectangular, square, or other polygonal shape. Securing box girder 100 the stress during the beam storage period is safe, the generation of cracks during the beam storage period is avoided, and meanwhile, the deformation during the beam storage period can be reduced.
In one embodiment, three of the supports 200 are respectively a main support 210 and two secondary supports 220, the main support 210 is located in the plane of the web 120 on the box girder 100 and is located close to the side where one long side of the box girder 100 is located, the two secondary supports 220 are spaced from the main support 210 and enclose a triangle, and the two secondary supports 220 are located close to the side where the other long side of the box girder 100 is located. The three supports 200 are respectively close to the two side faces where the long edges are located, so that the three supports 200 can be ensured to enclose a larger triangular area, stable support is provided for the box girder 100, and stress safety of the box girder 100 during girder storage is ensured. Meanwhile, one side of the two sub brackets 220 is flush with the side of the short side of the box girder 100.
In one embodiment, the width of the primary support 210 is less than the thickness of the web 120. Specifically, the width of the main support 210 is 8cm to 10cm smaller than the thickness of the web 120. In this embodiment, the web 120 has a thickness of 40cm and the support 200 has a width of 30 cm. Meanwhile, the center line of the holder 200 in the width direction coincides with the center line of the web 120.
In one embodiment, the distance A from the main support 210 to a long side of the box girder 100 is greater than or equal to 20 cm. The supporting stability of the main stand 210 to the box girder 100 can be ensured. In the present embodiment, the distance A from the main holder 210 to one long side of the box girder 100 is 20 cm. In other embodiments, the distance from the main support 210 to one long side of the box girder 100 may also be 25cm or 28 cm.
In one embodiment, the distance B from the secondary support 220 to the other long side of the box girder 100 is less than or equal to one quarter of the width of the box girder 100. Further, the distance B from the sub bracket 220 to the other long side of the box girder 100 is 20cm to 22cm smaller than one fourth of the width of the box girder 100. In the present embodiment, the width of the box girder 100 is 350 cm. The distance from the secondary support 220 to the other long side of the box girder 100 is 350/4-87.5 cm. Further, 87.5-20 cm or 87.5-22 cm or 65.5cm, i.e. the distance B from the secondary support 220 to the other long side of the box girder 100 is less than or equal to 65.5cm to 67.5 cm. The distance B from the sub mount 220 to the other long side of the box girder 100 is greater than or equal to 20 cm.
In one embodiment, three of the holders 200 can form an isosceles triangle. The three supports 200 can also enclose an equilateral triangle. The triangle formed by the three supports 200 should follow the distance rule from the support 200 to the long edge, so that the support 200 can effectively support the box girder 100, the stress safety of the box girder 100 during the girder storage period is ensured, the generation of cracks during the girder storage period is avoided, and the deformation during the girder storage period can be reduced.
In one embodiment, the number of the supporting bases 200 may be four or five. At least three of the supports 200 can form a triangle, and at least one of the three supports 200 can be located in the plane of the web 120. Other supports 200 can also provide stable support for the box girder 100, further guarantee the atress safety of box girder 100 during beam storage, avoid producing the crack of beam storage period, can also reduce the deformation of beam storage period simultaneously.
The unidirectional dual-chamber box girder in the above embodiment is embodied as a segment 3.6m high and 3m long. The stock support is a wood board wrapped with plastic.
In a specific implementation process, pouring precast concrete into the single-box double-chamber precast segment box girder in a girder storage period;
and hoisting the anti-cracking structure of the single-box double-chamber prefabricated section box girder in the girder storage period to a preset bridge position for installation and construction.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
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 at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may directly conflict with the first and second features, or the first and second features may indirectly conflict with each other through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The utility model provides a structure that ftractures is prevented to case roof beam shelf life, its characterized in that, case roof beam shelf life prevents the structure that ftractures and includes:
the box girder is internally provided with a support cavity, a web plate is arranged in the support cavity, and the plane of the web plate is parallel to the width direction of the box girder; and
the number of the supports is at least three, the at least three supports are arranged on one side surface of the box girder facing the ground, the positions of the three supports on the box girder can enclose a triangle, and the position of one support on the box girder is located in the plane of the web plate.
2. The box girder beam storage period anti-cracking structure according to claim 1, wherein the length of the support ranges from 50cm to 70 cm; the width range of the support is 20 cm-40 cm; the height range of the support is 10 cm-30 cm.
3. The box girder in shelf life anti-crack structure according to claim 1, wherein a contact area of the support and the box girder is 1800cm or more2。
4. The box girder in shelf life anti-crack structure according to claim 1, wherein the support is rectangular in shape; and/or
Wherein three of the supports can enclose an isosceles triangle.
5. The box girder storage period anti-cracking structure of any one of claims 1 to 4, wherein three of the supports are a main support and two auxiliary supports, the main support is located on the box girder in the plane of the web and is located close to the side where one long side of the box girder is located, the two auxiliary supports are spaced from the main support and enclose a triangle, and the two auxiliary supports are located close to the side where the other long side of the box girder is located.
6. The box girder shelf-life crack prevention structure of claim 5, wherein the width of the main bearer is less than the thickness of the web.
7. The box girder shelf-life crack prevention structure of claim 6, wherein the width of the main bearer is 8cm to 10cm smaller than the thickness of the web.
8. The box girder shelf life crack prevention structure of claim 5, wherein a distance from the main support to one long side of the box girder is greater than or equal to 20 cm.
9. The box girder shelf life anti-crack structure of claim 5, wherein the distance from the secondary support to the other long side of the box girder is less than or equal to one quarter of the width of the box girder.
10. The box girder storage period anti-cracking structure according to claim 9, wherein the distance from the secondary support to the other long side of the box girder is 20cm to 22cm smaller than one fourth of the width of the box girder.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210025151.7A CN114541241A (en) | 2022-01-11 | 2022-01-11 | Anti-cracking structure for box girder in girder storage period |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210025151.7A CN114541241A (en) | 2022-01-11 | 2022-01-11 | Anti-cracking structure for box girder in girder storage period |
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| CN202210025151.7A Pending CN114541241A (en) | 2022-01-11 | 2022-01-11 | Anti-cracking structure for box girder in girder storage period |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD216073A1 (en) * | 1983-06-17 | 1984-11-28 | Schwermasch Dimitrof G | DEVICE FOR TRACKING LOCKING ON AXES O. DGL. STORED INSTALLATION PARTS IN BOX TRAVELERS O.AE. CARRYING STRUCTURES, IN PARTICULAR IN ROLLING TABLES OF LOADERS |
| CN103669922A (en) * | 2013-12-23 | 2014-03-26 | 中铁五局集团贵州工程有限公司 | Pipe pile foundation beam storage platform base shared by various beams and installing method |
| CN204489562U (en) * | 2015-02-04 | 2015-07-22 | 中铁十八局集团第一工程有限公司 | A kind of supporting construction depositing steel box-girder |
| CN208502315U (en) * | 2018-06-13 | 2019-02-15 | 花健 | A kind of stable structure type building support |
| CN111549657A (en) * | 2020-05-22 | 2020-08-18 | 贵州路桥集团有限公司 | Rapid installation method of bridge basin-type rubber support |
-
2022
- 2022-01-11 CN CN202210025151.7A patent/CN114541241A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD216073A1 (en) * | 1983-06-17 | 1984-11-28 | Schwermasch Dimitrof G | DEVICE FOR TRACKING LOCKING ON AXES O. DGL. STORED INSTALLATION PARTS IN BOX TRAVELERS O.AE. CARRYING STRUCTURES, IN PARTICULAR IN ROLLING TABLES OF LOADERS |
| CN103669922A (en) * | 2013-12-23 | 2014-03-26 | 中铁五局集团贵州工程有限公司 | Pipe pile foundation beam storage platform base shared by various beams and installing method |
| CN204489562U (en) * | 2015-02-04 | 2015-07-22 | 中铁十八局集团第一工程有限公司 | A kind of supporting construction depositing steel box-girder |
| CN208502315U (en) * | 2018-06-13 | 2019-02-15 | 花健 | A kind of stable structure type building support |
| CN111549657A (en) * | 2020-05-22 | 2020-08-18 | 贵州路桥集团有限公司 | Rapid installation method of bridge basin-type rubber support |
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