CN219195654U - Temporary support for steel box girder - Google Patents

Abstract

The utility model discloses a temporary support for a steel box girder, which comprises a bracket. The support is vertically extended, the upper side of the support is provided with a steel box girder supporting part for supporting the steel box girder, and the lower side of the support is provided with a cap placement part for placing on the pier cap. Place the cap placement part at the lower end of the bracket on the pier cap, and the upper end of the bracket has a steel box girder supporting part that can support the steel box girder. When the steel box girder is erected, place it above the bracket, and use the pier cap to place the steel box girder Temporary support eliminates the need for pre-foundation treatment on the ground between bridge piers, improving construction efficiency.

Description

Steel box girder temporary support

technical field

The utility model relates to the field of steel box girder construction, in particular to a temporary support for a steel box girder.

Background technique

The flyover bridge has a plurality of pier arranged in a row and a bridge deck spanning above the pier, and the pier is built on the pier cap. In the process of urban construction, it is sometimes necessary to upgrade the old flyover bridge into a steel box girder type flyover bridge. Before the erection of the steel box girder, it is necessary to set up a temporary support of the steel box girder. During reconstruction, it is necessary to remove the old bridge deck, retain the bridge piers and bridge pier caps, and carry out a series of foundation treatment procedures on the ground between the bridge piers. Only after foundation treatment can the steel box girder be temporarily supported on the ground, and the steel box girder The process of setting temporary supports on the ground that needs foundation treatment, including replacement, dynamic compaction, pouring of temporary foundations, etc., and then setting the temporary supports of steel box girders on the temporary foundations. After the temporary support of the steel box girder is removed, the ground needs to be restored. The overall process takes a long time and has a great impact on the lives of surrounding residents, which is not conducive to improving construction efficiency.

Utility model content

The utility model aims at at least solving one of the technical problems existing in the prior art. For this reason, the utility model proposes a steel box girder temporary support, which can improve construction efficiency.

The temporary support of the steel box girder according to the embodiment of the first aspect of the utility model includes a bracket. The support is vertically extended, the upper side of the support is provided with a steel box girder supporting part for supporting the steel box girder, and the lower side of the support is provided with a cap placement part for placing on the pier cap.

The steel box girder temporary support according to the embodiment of the first aspect of the utility model has at least the following beneficial effects: the cap placement part at the lower end of the bracket is placed on the pier cap, and the upper end of the bracket has a steel box girder bearing capable of supporting a steel box girder. The supporting part, the steel box girder is placed above the bracket when erecting, and the bridge pier cap is used to place the steel box girder temporary support, without pre-foundation treatment on the ground between the bridge piers, improving construction efficiency.

According to some embodiments of the present utility model, the support is provided with a pier relief chamber, and the support includes at least three support rods arranged vertically, the support rods are distributed around the pier relief chamber at intervals, and In the direction of the pier relief cavity, a first connection structure is provided between two adjacent support rods, and opposite ends of the first connection structure are respectively connected to two adjacent support rods.

According to some embodiments of the present invention, the first connecting structure includes two horizontal connecting bars and two oblique connecting bars, the two horizontal connecting bars are parallel to each other and arranged up and down, and the two oblique connecting bars are arranged crosswise and The middle parts of the two are connected, the two ends of the horizontal connecting bar are respectively connected with the two adjacent support bars, the two ends of the oblique connecting bar are respectively connected with the two adjacent supporting bars, and the oblique connecting bar Located between the two horizontal connecting bars.

According to some embodiments of the present invention, the support rods are arranged in two rows, and each row of the support rods is arranged along the left and right directions, and the two rows of the support rods are respectively placed on the front and rear sides of the pier give way cavity, The bracket also includes two upper beams extending in the left and right directions, the two upper beams correspond to the two rows of support rods one by one, and the upper ends of each row of support rods are connected to the corresponding upper beams. The supporting part of the steel box girder is arranged on the upper beam.

According to some embodiments of the present invention, the two rows of support rods are connected through a second connection structure.

According to some embodiments of the present utility model, in each row of the support rods, the lower ends of at least part of the support rods are connected with lower cross bars, and the two ends of the lower cross bars are respectively used to support the left and right adjacent two a said pier cap.

According to some embodiments of the present utility model, the platform placement part is a support plate arranged at the lower end of the support rod, and the support plate is arranged horizontally.

According to some embodiments of the present utility model, the supporting part of the steel box girder is a leveling rod arranged vertically.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present utility model will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 is the front view schematic diagram of steel box girder bridge and steel box girder temporary support of the utility model embodiment;

Fig. 2 is the top view schematic diagram of steel box girder temporary support, bridge pier and bridge pier cap of the utility model embodiment;

Fig. 3 is the schematic side view of the steel box girder bridge of the utility model embodiment;

Fig. 4 is the flowchart of the construction method of the steel box girder bridge of the utility model embodiment;

Fig. 5 is a flowchart of a method for erecting at least two steel box girders above the temporary supports of the steel box girders according to an embodiment of the present invention.

Reference signs:

Bracket 100, steel box girder supporting part 110, cap placement part 120, pier relief cavity 130, support rod 140, first connection structure 150, horizontal connection bar 151, oblique connection bar 152, upper beam 160, second connection structure 170, lower crossbar 180;

Steel box girder bridge 200, steel box girder 210, pier cap 220, pier 230;

The ground between the pier caps is 300.

Detailed ways

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present utility model, but should not be construed as limiting the present utility model.

In the description of the present utility model, it should be understood that when it comes to orientation descriptions, for example, the orientation or positional relationship indicated by up, down, etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and Simplified descriptions do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the invention.

In the description of the present utility model, a plurality refers to more than two. If the description of the first and second is only for the purpose of distinguishing the technical features, it cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features relation.

In the description of the utility model, unless otherwise clearly defined, words such as setting, installation, and connection should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above-mentioned words in the utility model in combination with the specific content of the technical solution .

Referring to Fig. 1 to Fig. 5, it is the temporary support of the steel box girder of the embodiment of the present utility model, including the bracket 100. The bracket 100 is vertically extended, and the upper side of the bracket 100 is provided with a steel box girder supporting part 110 for supporting the steel box girder 210, and the lower side of the bracket 100 is provided with a cap placement part for placing on the pier cap 220 120. Place the cap placement part 120 at the lower end of the bracket 100 on the pier cap 220, the upper end of the bracket 100 has a steel box girder supporting part 110 that can support the steel box girder 210, and the steel box girder 210 is placed above the bracket 100 when erected, By using the pier cap 220 to place the temporary support of the steel box girder, there is no need to perform pre-foundation treatment on the ground between the pier 230, thereby improving construction efficiency.

In the embodiment, the support 100 is provided with a pier relief cavity 130, and the support 100 includes ten support rods 140 arranged vertically. Above, a first connection structure 150 is disposed between two adjacent support rods 140 , and opposite ends of the first connection structure 150 are respectively connected to two adjacent support rods 140 . The support 100 forms a pier relief cavity 130, and the support rod 140 surrounds the pier relief cavity 130. The support rod 140 is firmly locked in position through the first connection structure 150, so that when the support 100 is stressed, the stress on the pier cap 220 is relatively evenly distributed. The adverse effect on the bridge pier 230 caused when the bracket 100 is arranged on the bridge pier cap 220 is reduced. At this time, the bridge pier relief cavity 130 can allow two bridge piers 230 to pass through.

It is conceivable that the number of support rods 140 of the bracket 100 may also be three, four or more than four.

Specifically, the support rod 140 is a hollow straight pipe. It is conceivable that the support rod 140 can also be I-beam.

It is conceivable that the bracket 100 may be a cylinder surrounded by a plurality of support plates, and the pier relief cavity 130 is provided in the cylinder.

In the embodiment, the first connecting structure 150 includes two horizontal connecting bars 151 and two oblique connecting bars 152, the two horizontal connecting bars 151 are arranged parallel to each other and arranged up and down, and the two oblique connecting bars 152 are intersected and connected in the middle. Both ends of the horizontal connecting bar 151 are respectively connected to two adjacent support bars 140 , both ends of the oblique connecting bar 152 are respectively connected to two adjacent supporting bars 140 , and the oblique connecting bar 152 is located between the two horizontal connecting bars 151 . The above-mentioned first connection structure 150 can relatively firmly fix the positions of two adjacent support rods 140 , and has a simple structure. Specifically, the horizontal connection bar 151 and the oblique connection bar 152 are both angle steel, which have better bending resistance. It is conceivable that the horizontal connecting bar 151 and the oblique connecting bar 152 can also be hollow straight tubes. It is conceivable that the first connection structure 150 may also be a cross bar, and two supporting rods 140 are connected at both ends of the cross bar.

In the embodiment, there are two rows of support rods 140, and each row of support rods 140 is arranged along the left and right directions. Two upper beams 160 correspond to two rows of support rods 140 one by one. The upper end of each row of support rods 140 is connected to the corresponding upper beam 160 . The steel box girder supporting part 110 is arranged on the upper beam 160 . The upper beam 160 is provided to facilitate the installation of the steel box girder supporting portion 110 at various positions of the upper beam 160 , so that the support for the steel box girder 210 is more flexible. Specifically, the upper beam 160 is I-beam. It is conceivable that the upper beam 160 may also be a square steel pipe or the like.

In some embodiments, two rows of support rods 140 are connected through a second connection structure 170 . The two rows of support rods 140 are connected through the second connection structure 170 , the strength between the two rows of support rods 140 is better, the structure is simple, and it is easy to implement. Specifically, the structure of the second connection structure 170 is the same as that of the first connection structure 150 , which will not be repeated here. It is conceivable that the second connection structure 170 may also be a cross bar, and two ends of the cross bar are connected to two rows of support bars 140 .

For the case where there are two or more piers in the left and right directions, the following settings can be used:

In some embodiments, in each row of the support rods 140, the lower ends of some of the support rods 140 are connected with lower cross bars 180, and the two ends of the lower cross rods 180 are respectively used to support the left and right adjacent two. One of the pier caps 220. The bracket 100 of the above structure can be installed across the bridge pier cap 220, and the supporting effect is better, and the structure is relatively firm. It is also conceivable that the lower ends of all the support bars 140 in each row are connected to the lower cross bar 180 . Since there are two rows of support rods 140 , there are also two lower cross bars 180 . Specifically, the lower cross bar 180 is I-shaped steel. It is conceivable that the lower rail 180 can also be a square tube.

Specifically, the bearing platform placement part 120 is a support plate arranged at the lower end of the support rod 140, and the support plate is arranged horizontally. Make the support tube more stable. It is conceivable that the platform placement part 120 may also be the lower end of the support tube.

In the embodiment, the steel box girder supporting part 110 is a leveling rod arranged vertically. A leveling bar is provided to facilitate the leveling and installation of the steel box girder 210. Specifically, the leveling rod is a straight pipe arranged vertically. It is conceivable that the leveling rod can also be of other structures, such as a straight rod. It is conceivable that the steel box girder supporting part 110 can also be the upper beam 160 , and the steel box girder 210 is directly supported by the upper beam 160 .

Specifically, the support rod 140, the first connection structure 150, the upper beam 160 and the second connection structure 170 are all connected by welding. It is conceivable that the connection can also be realized by means of screw connection.

In the embodiment, a construction method of a steel box girder bridge 200 temporarily supported by the above-mentioned steel box girder is also disclosed, including the following steps:

S1: Temporary supports for steel box girders are set on the caps 220 of each pier;

S2: erect at least two steel box girders 210 above the temporary support of the steel box girders, fix the joints between the steel box girders 210, and connect the steel box girders 210 end to end to form a steel box girder bridge 200;

S3: Remove the temporary support of the steel box girder on the pier cap 220 .

Due to the above-mentioned temporary support of the steel box girder, there is no need for complex ground treatment between the pier caps 220, which can improve construction efficiency.

Specifically, the steel box girder bridge 200 is formed by splicing two, three or more steel box girders 210 .

In an embodiment, the method for erecting at least two steel box girders 210 above the temporary support of the steel box girders includes the following steps:

Erection of the front and rear ends of the first steel box girder 210 on the temporary supports of the front and back adjacent two steel box girders;

The rear end of the second steel box girder 210 is erected on the third steel box girder temporary support, so that the front end of the second steel box girder 210 is locked with the rear end of the first steel box girder 210;

By analogy, the rear end of the Nth steel box girder 210 is erected on the N+1th steel box girder temporary support, so that the front end of the Nth steel box girder 210 is connected to the N-1th steel box girder. The rear end of the steel box girder 210 is locked until the erection of the last steel box girder 210 is completed; wherein, N is not less than 2.

Specifically, for the locking between the steel box girders 210, connection plates can be provided at both ends of the steel box girder 210, and the connection plates are provided with through holes. When the two connection plates abut, the two connection plates are locked with screws. Lock two adjacent steel box girders 210 before welding; or set a plug-in block at the end of the previous steel box girder 210, set a slot at the front end of the adjacent steel box girder 210, and insert the plug-in block into The slots are used to lock the two before welding. The above-mentioned erection method makes full use of the steel box girder 210 at the front section to assist in fixing the steel box girder 210 at the rear end, so as to facilitate the welding between the steel box girders 210 .

Specifically, the rear end of the steel box girder 210 protrudes beyond the pier 230 . The end of the steel box girder 210 exceeds and extends out of the bridge pier 230, so that the temporary support can support the steel box girder 210 as a whole, the supporting effect is better, the pressure on the bridge pier cap 220 is relatively uniform, and it is also convenient for construction personnel to adjust the steel box girder. 210 joints are welded and fixed.

Specifically, the distance from the rear end of the steel box girder 210 protruding from the pier 230 is preferably 1 m, which is the best for use. It is understood that it can also be other sizes, such as 0.5 meters to 2 meters. You need to determine this overhang yourself.

In the description of this specification, references to the terms "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific examples," or "some examples" are intended to mean that the implementation Specific features, structures, materials or characteristics described in an embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and modifications, the scope of the present invention is defined by the claims and their equivalents.

Claims (8)

1. A steel box girder temporary support, characterized in that it comprises: The bracket (100) is vertically extended, the upper side of the bracket (100) is provided with a steel box girder supporting part (110) for supporting the steel box girder (210), and the lower side of the bracket (100) A cap placement part (120) for placing on the pier cap (220) is provided on the side. 2. The steel box girder temporary support according to claim 1, characterized in that: the support (100) is provided with a pier relief cavity (130), and the support (100) includes at least three vertically arranged supports Rods (140), the support rods (140) are distributed at intervals around the pier relief cavity (130), and along the direction surrounding the pier relief cavity (130), two adjacent support rods (140) ) is provided with a first connection structure (150), and opposite ends of the first connection structure (150) are respectively connected to two adjacent support rods (140). 3. The steel box girder temporary support according to claim 2, characterized in that: the first connecting structure (150) comprises two horizontal connecting bars (151) and two oblique connecting bars (152), the two The horizontal connecting bars (151) are parallel to each other and arranged up and down, and the two oblique connecting bars (152) are intersected and connected in the middle of the two. rods (140), the two ends of the oblique connecting bars (152) are respectively connected to two adjacent supporting rods (140), and the oblique connecting bars (152) are located between the two horizontal connecting bars (151) between. 4. The temporary support for steel box girder according to claim 3, characterized in that: said support rods (140) are arranged in two rows, each row of said support rods (140) is arranged in a left-right direction, and said two rows The support rods (140) are separately placed on the front and rear sides of the pier relief cavity (130), and the support (100) also includes two upper beams (160) extending in the left and right directions, and the two upper beams ( 160) corresponds to two rows of support rods (140) one by one, the upper end of each row of support rods (140) is connected to the corresponding upper beam (160), and the steel box girder supporting part (110) is set on the upper beam (160). 5. The temporary support of steel box girder according to claim 4, characterized in that: two rows of said support rods (140) are connected by a second connection structure (170). 6. The steel box girder temporary support according to claim 4, characterized in that: in each row of the support rods (140), at least part of the lower ends of the support rods (140) are connected with lower cross bars (180) , the two ends of the lower cross bar (180) are respectively used to support the two left and right adjacent pier caps (220). 7. The temporary support of steel box girder according to claim 4, characterized in that: the cap placement part (120) is a support plate arranged at the lower end of the support rod (140), and the support plate is arranged horizontally. 8. The temporary support of the steel box girder according to claim 1, characterized in that: the supporting part (110) of the steel box girder is a leveling rod arranged vertically.

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