Large-span steel box and stiffening corrugated steel web combined box girder

Abstract

The invention provides a large-span steel box and stiffening corrugated steel web combined box girder which comprises a bottom plate, steel webs are fixedly installed on the two sides of the top of the bottom plate, the steel webs are in a wave shape, and a top plate is fixedly installed at the top ends of the steel webs. By means of the arrangement of a displacement column, a driving rod can drive a displacement screw rod to rotate after rotating in the supporting outer rod, the displacement screw rod can drive the supporting inner rod to slide upwards in the supporting outer rod, and therefore the supporting inner rod can be driven to slide upwards in the supporting outer rod, and the supporting inner rod can be driven to slide upwards in the supporting outer rod. Through the auxiliary supporting effect of the supporting inner rods and the supporting outer rods, the number of the supporting positions of the supporting columns on the top plate is increased, and the supporting effect and the using performance of the whole large-span box girder are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of composite box girders, and in particular relates to a composite box girder of a large-span steel box combined with a stiffened corrugated steel web. Background Art

[0002] Box girder is a type of beam commonly used in bridge engineering. It is hollow inside with flanges on both sides of the upper part. The overall shape is similar to a box, hence the name. Box girders are widely used in various bridge constructions and have unique structural and performance advantages. The construction process of box girders varies depending on the construction method. Taking cast-in-place box girders as an example, the main construction steps include foundation treatment, support erection, box girder bottom formwork installation, support pre-compression, steel bar binding, concrete pouring, and curing. During the construction process, the quality of each process needs to be strictly controlled to ensure the overall performance of the box girder. In order to meet the development needs of bridge structures towards long spans, wide bridge decks, and lightweight, a wide-body box girder with corrugated steel webs with added supports or stiffening ribs is combined. At present, the composite box girder has the following common defects:

[0003] In the use of traditional large-span steel box combined with reinforced corrugated steel web composite box girder, it is necessary to support the concrete top plate and the concrete bottom plate through inclined support columns. Due to the large span between the top plates, only the two ends of the top plates are supported, which can easily lead to the middle positions on both sides of the large-span top plates being unable to be supported, thereby reducing the performance of the overall composite box girder. Summary of the invention

[0004] The purpose of the present invention is to provide a composite box girder of a large-span steel box combined with a stiffened corrugated steel web, aiming to solve the problem in the prior art that due to the large span between the top plates, only the two end positions of the top plates are supported, which easily leads to the middle positions on both sides of the large-span top plates being unable to be supported, thereby reducing the performance of the overall composite box girder.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A large-span steel box combined with a stiffened corrugated steel web composite box girder comprises a bottom plate, steel webs are fixedly installed on both sides of the top of the bottom plate, the steel webs are wavy, a top plate is fixedly installed on the top of the steel web, a plurality of support columns are arranged between the bottom plate and the top plate, the two ends of the plurality of support columns are respectively fixedly connected to the inner walls on both sides of the top plate and the bottom plate, the inner side walls of the support columns are rotatably connected to two support outer rods, the top inner walls of the two support outer rods are slidably connected to support inner rods, and the top ends of the support inner rods are respectively fixedly installed with a clamping groove and a fitting groove.

[0007] As a preferred embodiment of the present invention, a first rotating shaft and a second rotating shaft are respectively fixedly mounted on both sides of the bottom end of the supporting outer rod, and outer sides of the first rotating shaft and the second rotating shaft are rotatably connected to the inner side wall of the supporting column.

[0008] As a preferred embodiment of the present invention, the inner wall of the supporting outer rod is rotatably connected with a displacement screw, the outer side of the displacement screw is threadedly connected to the inner wall of the supporting inner rod, the inner wall of the bottom end of the supporting outer rod is rotatably connected with a driving rod, and the outer side of the driving rod and the bottom end of the displacement screw are fixedly installed with bevel gears.

[0009] As a preferred embodiment of the present invention, the inner side wall of the first rotating shaft is threadedly connected with a displacement column, the inner side wall of the displacement column is slidably connected with a displacement rod, and the other end of the displacement rod is fixedly connected to one end of the driving rod.

[0010] As a preferred embodiment of the present invention, a steering ring is fixedly mounted on the outer side of the first rotating shaft, and an adjusting ring is fixedly mounted on one end of the displacement column.

[0011] As a preferred embodiment of the present invention, a plurality of transverse stiffening ribs are fixedly mounted on the inner side wall of the top plate, and the outer sides of the plurality of transverse stiffening ribs are fixedly connected to the top end of the steel web.

[0012] As a preferred embodiment of the present invention, a plurality of longitudinal stiffening ribs are fixedly installed on the outer side of the transverse stiffening ribs, and the tops of the plurality of longitudinal stiffening ribs are fixedly connected to the bottom inner wall of the top plate.

[0013] As a preferred embodiment of the present invention, the fitting groove 62 is made of metal and has anti-slip grooves on its surface.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1) The two outer support rods are rotated out of the support column through the first rotation axis, so that one of the inner support rods slides out from the inner support rods, and the top slot is engaged with the transverse stiffening rib on the top plate, and then the driving rod is driven by the displacement column to rotate inside the outer support rod and then drive the displacement screw to rotate, so that the displacement screw can drive the inner support rod to slide upward inside the outer support rod, so that the slot is vertically upward and fits with the transverse stiffening rib, and then the auxiliary support of the inner support rod and the outer support rod is used to increase the position of the support column supporting the top plate, thereby improving the supporting effect and performance of the overall large-span box girder.

[0016] 2) By fitting the provided fitting groove with the outer side of the steel web, another inner support rod and outer support rod on the support column can be used to support the steel web, thereby playing an inward supporting role in the middle position where the steel web itself is relatively high. In addition, through the provided adjustment and turning ring, the outer support rod is easier to rotate out from the inside of the support column, and the inner support rod is easier to slide from the outside of the outer support rod, thereby playing a supporting role, thereby improving the convenience of the overall box girder when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the card slot structure of the present invention;

[0020] Figure 3 It is a schematic diagram of the top plate structure of the present invention;

[0021] Figure 4 It is a schematic diagram of the support column structure of the present invention;

[0022] Figure 5 It is a schematic diagram of the internal structure of the supporting outer rod of the present invention.

[0023] In the figure: 1. bottom plate; 2. steel web; 3. top plate; 31. transverse stiffening ribs; 32. longitudinal stiffening ribs; 4. support column; 5. support outer rod; 51. first rotating shaft; 52. second rotating shaft; 53. displacement screw; 54. driving rod; 55. bevel gear; 56. displacement column; 57. displacement rod; 58. steering ring; 59. adjustment ring; 6. support inner rod; 61. slot; 62. fitting slot. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] See also Figure 1-5The present invention provides the following technical solutions: a large-span steel box combined with a stiffened corrugated steel web composite box girder, comprising a bottom plate 1, steel webs 2 are fixedly installed on both sides of the top of the bottom plate 1, the steel webs 2 are wavy, a top plate 3 is fixedly installed on the top of the steel web 2, a plurality of support columns 4 are arranged between the bottom plate 1 and the top plate 3, the two ends of the plurality of support columns 4 are respectively fixedly connected to the inner walls of both sides of the top plate 3 and the bottom plate 1, the inner side walls of the support columns 4 are rotatably connected to two support outer rods 5, the inner walls of the top ends of the two support outer rods 5 are slidably connected to support inner rods 6, and the top ends of the support inner rods 6 are respectively fixedly installed with a card slot 61 and a fitting slot 62.

[0026] In specific use, when the box girder is used, the support column 4 supports the top plate 3 and the bottom plate 1, and then one of the support outer rods 5 drives the support inner rod 6 to rotate upward from the inside of the support column 4, so that the support inner rod 6 is in an upward vertical state, and the support inner rod 6 is driven upward inside the support outer rod 5, so that the support inner rod 6 drives the slot 61 at its top end to continuously move toward the position of the top plate 3, so that the part between the top plate 3 and the steel web 2 can be moved to the middle position by the action of the support outer rod 5 and the support inner rod 6. It plays an auxiliary supporting role, thereby increasing the use and supporting effect of the large-span top plate 3. Similarly, another supporting outer rod 5 can also be rotated out from the inside of the movable rod supporting column 4, so that the supporting outer rod 5 can drive the supporting inner rod 6 to rotate upward to a horizontal state, and then the supporting inner rod 6 slides inside the supporting outer rod 5, so that the fitting groove 62 on the supporting inner rod 6 is in contact with the outer side of the steel web 2. Therefore, when the height of the steel web 2 is relatively high, the supporting inner rod 6 and the supporting outer rod 5 at the position of the fitting groove 62 play a further lateral supporting role, thereby improving the use performance and supporting effect of the overall box girder.

[0027] Preferably, a first rotating shaft 51 and a second rotating shaft 52 are fixedly mounted on both sides of the bottom end of the supporting outer rod 5 , and the outer sides of the first rotating shaft 51 and the second rotating shaft 52 are rotatably connected to the inner side wall of the supporting column 4 .

[0028] During specific use, when it is necessary to support the outer rod 5 to drive the inner rod 6 to rotate out from the inside of the support column 4 to a vertical and horizontal state, the first rotating shaft 51 can be rotated so that the first rotating shaft 51 can drive the outer rod 5 to rotate out from the inside of the support column 4, and through the rotation of the first rotating shaft 51 and the second rotating shaft 52 inside the support column 4, the separation and deviation between the outer rod 5 and the support column 4 during rotation can be effectively prevented.

[0029] Preferably, the inner wall of the supporting outer rod 5 is rotatably connected to a displacement screw 53, the outer side of the displacement screw 53 is threadedly connected to the inner wall of the supporting inner rod 6, the inner wall of the bottom end of the supporting outer rod 5 is rotatably connected to a driving rod 54, and the outer side of the driving rod 54 and the bottom end of the displacement screw 53 are fixedly mounted with a bevel gear 55.

[0030] During specific use, when it is necessary to support the inner rod 6 to slide outward from the inside of the supporting outer rod 5, the driving rod 54 inside the supporting outer rod 5 can be operated to rotate, so that the driving rod 54 can drive the bevel gear 55 to rotate while rotating, so that the displacement screw 53 can be driven to rotate inside the supporting outer rod 5 through the action of the bevel gear 55, and the supporting inner rod 6 and the displacement screw 53 can rotate relative to each other, so that the supporting inner rod 6 can be driven by the displacement screw 53 to slide upward from the inside of the supporting outer rod 5, and then support the outer plate and the steel web 2.

[0031] Preferably, the inner wall of the first rotating shaft 51 is threadedly connected with a displacement column 56 , the inner wall of the displacement column 56 is slidably connected with a displacement rod 57 , and the other end of the displacement rod 57 is fixedly connected to one end of the driving rod 54 .

[0032] During specific use, when the driving rod 54 needs to be rotated, the displacement column 56 on the first rotating shaft 51 can be rotated so that the displacement column 56 can drive the driving rod 54 to rotate through the displacement rod 57 inside it, and the displacement column 56 is displaced with the first rotating shaft 51 while rotating, so that the displacement rod 57 and the displacement column 56 slide relative to each other. When the displacement column 56 is not rotated, the stability between the displacement column 56 and the first rotating shaft 51 plays a fixing role in the sliding between the supporting inner rod 6 and the supporting outer rod 5.

[0033] Preferably, a steering ring 58 is fixedly mounted on the outer side of the first rotating shaft 51 , and an adjusting ring 59 is fixedly mounted on one end of the displacement column 56 .

[0034] During specific use, when the first rotating shaft 51 needs to be rotated to drive the supporting outer rod 5 to rotate out from the inside of the supporting column 4, the steering ring 58 can be operated to make the first rotating shaft 51 drive the supporting outer rod 5 to rotate. When the displacement column 56 needs to be rotated, the adjustment ring 59 can be operated to make the displacement column 56 rotate inside the first rotating shaft 51, thereby improving the convenience of the overall operation through the operation of the steering ring 58 and the adjustment ring.

[0035] By fitting the fitting groove 62 with the outer side of the steel web 2, another inner support rod 6 and outer support rod 5 on the support column 4 can be used to support the steel web 2, thereby playing an inward supporting role in the middle position where the steel web 2 itself is relatively high. By also playing the role of the adjustment and turning ring 58, the outer support rod 5 is easier to turn out from the inside of the support column 4, and the inner support rod 6 is easier to slide from the outside of the outer support rod 5, thereby playing a supporting role, thereby improving the convenience of the overall box girder when in use.

[0036] Preferably, a plurality of transverse stiffening ribs 31 are fixedly mounted on the inner side wall of the top plate 3 , and the outer sides of the plurality of transverse stiffening ribs 31 are fixedly connected to the top end of the steel web 2 .

[0037] During specific use, the bottom of the top plate 3 plays a lateral role on the large span of the top plate 3 through the lateral stiffening ribs 31 , thereby increasing the lateral force acting on the top plate 3 .

[0038] Preferably, a plurality of longitudinal stiffening ribs 32 are fixedly mounted on the outer sides of the transverse stiffening ribs 31 , and the tops of the plurality of longitudinal stiffening ribs 32 are fixedly connected to the bottom inner wall of the top plate 3 .

[0039] During specific use, the bottom of the top plate 3 plays a longitudinal role on the large span of the top plate 3 through the longitudinal stiffening ribs 32 , thereby increasing the longitudinal and lateral force effects of the top plate 3 .

[0040] Preferably, the fitting groove 62 is made of metal and has anti-slip grooves on its surface.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A long-span steel box combined with a stiffened corrugated steel web composite box girder, comprising a bottom plate (1), characterized in that: Steel webs (2) are fixedly mounted on both sides of the top of the bottom plate (1), the steel webs (2) are wavy in shape, a top plate (3) is fixedly mounted on the top of the steel webs (2), a plurality of support columns (4) are arranged between the bottom plate (1) and the top plate (3), the two ends of the plurality of support columns (4) are respectively fixedly connected to the inner walls of both sides of the top plate (3) and the bottom plate (1), the inner side walls of the support columns (4) are rotatably connected to two support outer rods (5), the inner walls of the top ends of the two support outer rods (5) are slidably connected to support inner rods (6), and the top ends of the support inner rods (6) are respectively fixedly mounted with a clamping groove (61) and a fitting groove (62).

2. The large-span steel box combined with a stiffened corrugated steel web composite box girder according to claim 1, characterized in that: A first rotating shaft (51) and a second rotating shaft (52) are respectively fixedly mounted on both sides of the bottom end of the supporting outer rod (5), and the outer sides of the first rotating shaft (51) and the second rotating shaft (52) are rotatably connected to the inner side wall of the supporting column (4).

3. The large-span steel box combined with a stiffened corrugated steel web composite box girder according to claim 2, characterized in that: The inner wall of the supporting outer rod (5) is rotatably connected to a displacement screw (53), the outer side of the displacement screw (53) is threadedly connected to the inner wall of the supporting inner rod (6), the inner wall of the bottom end of the supporting outer rod (5) is rotatably connected to a driving rod (54), and the outer side of the driving rod (54) and the bottom end of the displacement screw (53) are both fixedly mounted with a bevel gear (55).

4. The large-span steel box combined with a stiffened corrugated steel web composite box girder according to claim 3, characterized in that: The inner wall of the first rotating shaft (51) is threadedly connected to a displacement column (56), the inner wall of the displacement column (56) is slidably connected to a displacement rod (57), and the other end of the displacement rod (57) is fixedly connected to one end of the driving rod (54).

5. The large-span steel box combined with a stiffened corrugated steel web composite box girder according to claim 4, characterized in that: A steering ring (58) is fixedly mounted on the outer side of the first rotating shaft (51), and an adjustment ring (59) is fixedly mounted on one end of the displacement column (56).

6. The large-span steel box combined with a stiffened corrugated steel web composite box girder according to claim 1, characterized in that: A plurality of transverse stiffening ribs (31) are fixedly mounted on the inner side wall of the top plate (3), and the outer sides of the plurality of transverse stiffening ribs (31) are fixedly connected to the top end of the steel web (2).

7. The large-span steel box combined with a stiffened corrugated steel web composite box girder according to claim 6, characterized in that: A plurality of longitudinal stiffening ribs (32) are fixedly mounted on the outer sides of the transverse stiffening ribs (31), and the tops of the plurality of longitudinal stiffening ribs (32) are fixedly connected to the bottom inner wall of the top plate (3).

8. The large-span steel box combined with a stiffened corrugated steel web composite box girder according to claim 1, characterized in that: The fitting groove (62) is made of metal and has anti-slip grooves on its surface.

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