Formwork-free field assembly reinforced concrete composite beam structure

Abstract

The utility model discloses a formwork-free on-site assembly steel-concrete composite beam structure. The composite beam structure comprises two H-shaped steels, a steel beam and a steel beam, channel steel; two pieces of angle steel with opposite openings are arranged on the upper flange plates on the two sides of the channel steel; two folding flanges are arranged on the top face of the steel tank, and the transverse inner side faces of the folding flanges are connected to a lower flange plate of one piece of H-shaped steel; the bottom end of the long bolt rod is provided with a nut and embedded into concrete poured in the steel groove, the top end of the long bolt rod is upwards fastened, the upper flange plate and the transverse plate of the angle steel are connected in an overlapped mode, and the top end of the long bolt rod is provided with a nut and embedded into concrete poured in a groove cavity formed between the angle steel. According to the steel-concrete composite beam structure, the steel-concrete composite beam can be directly assembled on site through hot-rolled section steel products, the steel structure machining and manufacturing links are avoided, welding, formwork installation and reinforcing steel bar binding operation are not needed, the technological process is greatly shortened, independent replacement of a single component can be achieved in the operation period, and economic benefits are remarkable.

Description

TECHNICAL FIELD

[0001] The utility model belongs to bridge construction technical field, concretely relates to a kind of steel-concrete composite beam structure of no formwork field assembly. BACKGROUND

[0002] Compared with ordinary reinforced concrete beam bridge, steel-concrete composite bridge has the advantages of light weight, short construction period, reasonable stress and is widely used in engineering field.In addition, with the continuous development of bridge construction technology, prefabricated assembly technology is rising, components are manufactured through factory processing, then transported to site for installation, environmental impact is small, construction period is controllable, and quality is greatly improved.Therefore, the application of fabricated steel-concrete composite bridge combining steel-concrete composite bridge and prefabricated assembly technology gradually develops.However, the steel beam part in the existing fabricated steel-concrete composite beam still needs to be transported to the site for installation after being welded into shape by steel structure processing plant, and then the formwork is installed, the steel reinforcement is tied and the concrete slab is poured, the process flow is more, the welding workload is large, and the welding fatigue cracking disease during operation period is easily caused.Therefore, the steel-concrete composite bridge structure without formwork is directly assembled and formed by hot-rolled steel, which avoids the manufacturing link of steel structure processing plant and does not need welding, formwork installation and steel reinforcement tying.The process flow is simple, construction efficiency is high, and economic benefit is significant. SUMMARY

[0003] The utility model aims at overcoming the insufficient in prior art, provide a kind of steel-concrete composite beam structure of no formwork field assembly, reduce the difficulty of component field installation, avoid the erection of traditional formwork, reduce construction workload, greatly shorten construction period.

[0004] To achieve the above object, the utility model is implemented by the following technical scheme.

[0005] In the first aspect, the utility model provides a kind of steel-concrete composite beam structure of no formwork field assembly, comprising:

[0006] Two H-shaped steels, and gap is left between upper flange plate and between lower flange plate in transverse direction;

[0007] Channel steel is crossed between the gap of two upper flange plates and connects the two upper flange plates;

[0008] Two open angle steels are arranged on the upper flange plate on both sides of channel steel, and the angle steels are fixed by a plurality of transverse steel bars penetrating through channel steel;

[0009] Steel channel, the top surface is provided with two opposite folding flanges with opening in the middle, and the transverse inner side of folding flange is fastened and stacked by a plurality of long bolt rods and connected to the lower flange plate of one H-shaped steel;

[0010] The bottom end of the long bolt rod is installed with a nut and embedded in the concrete cast in the steel groove, and the top end of the long bolt rod is fastened upward and connected with the horizontal plate of the upper flange plate and the angle steel, and the top end is installed with a nut and embedded in the concrete cast in the groove cavity formed between the angle steels.

[0011] Further, the long bolt rod penetrates the lower flange plate and the folded flange on both sides and is fixed by nuts respectively; the long bolt rod penetrates the upper flange plate and the horizontal plate of the angle steel on both sides and is fixed by nuts respectively.

[0012] Further, the side vertical plate of the angle steel is welded with nuts for connecting the threaded end of the steel bar.

[0013] Further, the steel bar is a finish rolled threaded steel with threaded ends.

[0014] Further, the folded flange of the steel groove, the horizontal plate of the angle steel, the upper flange plate and the lower flange plate of the H-shaped steel are respectively provided with a plurality of spoon-shaped holes for penetrating the long bolt rod.

[0015] Further, the folded flange is connected to the vertical side plate top end of the steel groove through a rotatable folding page.

[0016] Further, the vertical side plate of the channel steel is provided with a spoon-shaped hole for penetrating the steel bar.

[0017] Further, the steel bar is provided with two nuts in the middle for screwing and clamping the nuts on both sides of the channel steel.

[0018] Further, the folded flange plates on both sides of the steel groove are configured to be rotatable in the groove by 270°, the folded flange plate and the joint at the root of the H-shaped steel web are sealed with sealing glue, the folded flange plate and the flange of the hot-rolled H-shaped steel are connected by the long bolt rod, and the steel groove is cast with concrete.

[0019] Compared with the prior art, the utility model has the advantages that: the steel mixed combined beam structure of the utility model is fixed on the upper flange of the H-shaped steel through the bolt and welding mode of the steel groove, the angle steel and the channel steel, so that the rigidity of the whole structure is increased. At the same time, the steel groove, the angle steel and the channel steel can be used as the formwork of the concrete, avoiding the erection of the traditional formwork, and greatly shortening the construction period.

[0020] In the concrete of the top plate, the steel bar is fixed by the bolt connection mode, without the need of setting the stirrup and binding, so that the on-site construction workload is significantly reduced, and the labor cost is greatly saved.

[0021] Compared with the prefabricated steel-concrete composite structure, the concrete of the steel-concrete composite beam structure of the application is cast in situ, the construction precision requirement is low, the difficulty of on-site installation of components can be reduced, and the construction progress can be accelerated; while the overall stiffness is improved, the construction cost and construction period are significantly reduced, and the steel-concrete composite beam structure has high economic benefit and practicality. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 A three-dimensional structure schematic diagram of a steel-concrete composite beam structure without formwork without formwork is provided.

[0023] Figure 2 A long bolt rod fixed between the top plate and the top plate is provided.

[0024] Figure 3 A steel tank with a foldable page and a foldable flange is provided.

[0025] Figure 4 An H-shaped steel with a spoon-shaped hole is provided.

[0026] Figure 5 A channel steel with a threaded steel bar and a spoon-shaped hole in the flange is provided.

[0027] Figure 6 An angle steel with a spoon-shaped hole and a welded nut in each limb is provided.

[0028] In the figure:

[0029] 1, angle steel; 2, H-shaped steel; 3, steel tank; 4, precision rolled threaded steel; 5, long bolt rod; 6, channel steel; 7, cast-in-place concrete slab; 8, nut; 9, foldable page; 10, spoon-shaped hole; 11, folded flange; 12, gap. DETAILED DESCRIPTION

[0030] The utility model will be further described below in combination with the drawings. The following examples are only used to more clearly illustrate the technical scheme of the utility model, and cannot limit the protection scope of the utility model.

[0031] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] like Figure 1 As shown, this utility model embodiment provides a formwork-free, on-site assembled steel-concrete composite beam structure, comprising:

[0034] Two H-beams 2, with a gap 12 left in the transverse direction between the upper flange plates and between the lower flange plates;

[0035] A channel steel 6 spans the gap 12 between the two upper flange plates and connects the two upper flange plates;

[0036] Two angle steels 1 with openings facing each other are provided on the upper flange plates on both sides of the channel steel 6. The angle steels 1 are fixed to each other by several transverse reinforcing bars that penetrate the channel steel 6.

[0037] The steel channel 3 has two opposing folding flanges 11 with an opening in the middle on its top surface. The inner lateral sides of the folding flanges 11 are fastened and stacked on the lower flange plate of an H-beam 2 by several long bolts 5.

[0038] The bottom end of the long bolt rod 5 is fitted with a nut 8 and embedded in the concrete poured in the steel channel 3. The top end of the long bolt rod 5 is fastened upward and connected to the upper flange plate and the cross plate of the angle steel 1. The top end is fitted with a nut 8 and embedded in the concrete poured in the cavity formed between the angle steel 1.

[0039] In the embodiment, the long bolt rod 5 penetrates the lower flange plate and the folded flange 11 on both sides and is fixed by the nut 8 respectively; the long bolt rod 5 penetrates the upper flange plate and the horizontal plate of the angle steel 1 on both sides and is fixed by the nut 8 respectively.

[0040] The side vertical plate of the angle steel 1 is welded with the nut 8 for connecting the threaded end of the steel bar.

[0041] The steel bar is the fine rolled threaded steel 4 with threads at both ends, and two nuts 8 for screwing the both sides of the clamping channel steel 6 are arranged in the middle of the steel bar.

[0042] In some specific embodiments, the steel bar can also be divided into three segments, one segment is arranged in the channel steel 6 and the nuts 8 are arranged at both ends of the segment; the other two segments are arranged between the angle steel 1 and the channel steel 6 and are connected and fixed by the nuts 8.

[0043] As shown in Figures 3-6 The folded flange 11 of the steel channel 3, the horizontal plate of the angle steel 1, the upper flange plate and the lower flange plate of the H-shaped steel 2 are respectively provided with a plurality of spoon-shaped holes 10 for penetrating the long bolt rod 5.

[0044] The vertical side plate of the channel steel 6 is provided with a spoon-shaped hole 10 for penetrating the steel bar, and the nut 8 can be arranged in the spoon-shaped hole 10 or on one side.

[0045] The folded flange 11 can be fixedly formed or connected to the top end of the vertical side plate of the steel channel 3 through the rotatable folding page 9.

[0046] In the embodiment, the long bolt rod 5 is upwardly protruding and embedded in the concrete, and a plurality of transverse steel bars can be uniformly arranged between the long bolt rods 5 according to actual design requirements, for example, three or four transverse steel bars are arranged between two long bolt rods 5.

[0047] In combination with the specific embodiments, the construction operation of the formwork-free field assembly of the steel-concrete composite beam structure in the embodiment of the utility model comprises the following specific steps.

[0048] Step S1: preparation work.

[0049] Check the construction site to ensure that it meets the safety requirements; prepare the required materials and equipment, including the H-shaped steel 2, the channel steel 6, the angle steel 1, the long bolt rod 5, the nut 8 and the concrete.

[0050] Step S2: install the H-shaped steel 2.

[0051] Prepare several sections of hot-rolled H-shaped steel 2, and take the Nth section of hot-rolled H-shaped steel 2 as an example. Position and install the N-1th section of hot-rolled H-shaped steel 2, place the two H-shaped steels 2 in the designed position, and support them with temporary support frames to ensure horizontal and vertical alignment. Ensure that there is a predetermined gap 12 between the upper flange plates and the lower flange plates.

[0052] Step S3: Install the channel steel 6 and the angle steel 1.

[0053] Install the connecting channel steel 6 in the gap 12 between the two upper flange plates. On the two upper flange plates on both sides of the channel steel 6, set two open angle steels 1 facing each other, and fix the angle steels 1 by passing through the steel bars across the spoon-shaped holes 10 on the channel steel 6, wherein the steel bars are threaded finish rolling threaded steel 4, the two ends are fixedly connected to the nuts 8 welded on the vertical side plates of the angle steels 1, and two nuts 8 are arranged at the middle part for tightening the two sides of the channel steel 6 to fix the transverse connection position.

[0054] Step S4: Install the steel channel 3.

[0055] Place the steel channel 3 in the designed position, so that the two folded flanges 11 of the steel channel 3 are stacked on the outer side of the lower flange plates of the two H-shaped steels 2, and ensure that the spoon-shaped holes 10 on the lower flange plates of the H-shaped steels 2 are aligned. Use long bolt rods 5 to pass through the spoon-shaped holes 10, and tighten the nuts 8 on both sides to tightly connect the folded flanges 11 of the steel channel 3 to the lower flange plates of the H-shaped steels 2, ensuring stability and alignment.

[0056] The bottom end of the long bolt rod 5 is installed with a nut 8 and embedded in the steel channel 3, and the top end of the long bolt rod 5 is upwardly fastened and stacked with the upper flange plates and the horizontal plates of the angle steels 1, and the top end is installed with a nut 8 and embedded in the groove cavity formed between the angle steels 1.

[0057] Step S5: Pour concrete.

[0058] Pour concrete inside the steel channel 3, embed the bottom end of the long bolt rod 5 and the nut 8 therein, and ensure that the concrete is completely filled; at the same time, concrete is also poured in the groove cavity formed between the angle steels 1, which wraps the top end of the long bolt rod 5, the channel steel 6, the bolt and the nut 8, ensuring stability and firmness of the connection.

[0059] Step S6: Acceptance and adjustment.

[0060] Check the construction quality to ensure that each component of the composite beam structure is firmly installed, tightly connected, and meets the design requirements; adjust and repair any problems that occur during construction to ensure the safety and stability of the structure.

[0061] In step S4, the steel tank 3 with foldable flange 11 plates is hoisted, the foldable flange 11 plates on both sides of the steel tank 3 are rotated 270° into the tank, the foldable flange 11 plates are sealed with sealant at the joint with the web root of the H-shaped steel 2, the foldable flange 11 plates are connected with the flanges of the hot-rolled H-shaped steel 2 by long bolt rods 5, and the steel tank 3 is poured with concrete.

[0062] The steel-concrete composite beam structure provided by the utility model has high strength and stability, can bear complex loads and environmental conditions, and is flexible to apply in different engineering projects.

[0063] The use of concrete in the steel-concrete composite structure increases the durability of the structure, enabling it to withstand environmental factors such as climate change, humidity, and chemical erosion for a long time.

[0064] In addition, the steel and concrete in the steel-concrete composite beam structure can be recycled, reducing resource waste and negative environmental impact.

[0065] The above is only the preferred embodiment of the utility model, and it should be noted that for ordinary technical personnel in the technical field, without departing from the technical principle of the utility model, several improvements and deformations can be made, which should also be considered as the protection range of the utility model.

Claims

1. A formless site-assembled steel-concrete composite beam structure, characterized by, The utility model relates to a kind of H-shaped steel connection structure, including: Two H-shaped steels, and the gap is left between upper flange plate and between lower flange plate in transverse direction; Channel steel is arranged across the gap between two upper flange plates and connects the two upper flange plates; Two open angle steels are arranged on the upper flange plate of both sides of channel steel, and the angle steels are fixed by a plurality of steel bars transversely penetrating channel steel between each other; Steel channel is provided with two opposite folding flanges with middle opening on top surface, and the transverse inner side of folding flange is fastened and stacked by a plurality of long bolt rods and connected with lower flange plate of one H-shaped steel; The bottom end of long bolt rod is installed with nut and embedded in concrete casted in steel channel, and the top end of long bolt rod is fastened and stacked with upper flange plate and horizontal plate of angle steel upwards, and top end is installed with nut and embedded in concrete casted in groove cavity formed between angle steels.

2. The self-erecting, field-assembled steel-concrete composite beam structure according to claim 1, characterized in that The long bolt rod is fixed by nut on both sides of lower flange plate and folding flange respectively penetrated by long bolt rod;The long bolt rod is fixed by nut on both sides of upper flange plate and horizontal plate of angle steel respectively penetrated by long bolt rod.

3. The self-erecting, field-assembled steel-concrete composite beam structure according to claim 1, wherein, Nut for connecting threaded end of steel bar is welded on side vertical plate of angle steel.

4. The self-erecting, field-assembled steel-concrete composite beam structure according to claim 1, wherein, The steel bar is fine rolled threaded steel with threaded ends.

5. The self-erecting, field-assembled steel-concrete composite beam structure according to claim 1, wherein, A plurality of spoon-shaped holes for penetrating long bolt rod are respectively arranged on folding flange of steel channel, horizontal plate of angle steel, upper flange plate and lower flange plate of H-shaped steel.

6. The self-erecting, field-assembled steel-concrete composite beam structure according to claim 1, wherein, Folding flange is connected to vertical side plate top end of steel channel by rotatable folding page.

7. The self-erecting, field-assembled steel-concrete composite beam structure according to claim 1, wherein, Spoon-shaped hole for penetrating steel bar is arranged on vertical side plate of channel steel.

8. The self-erecting, field-assembled steel-concrete composite beam structure according to claim 1, wherein, Two nuts for screwing and clamping both sides of channel steel are arranged in middle part of steel bar.

9. The self-erecting, field-assembled steel-concrete composite beam structure according to claim 1, wherein, Folding flange plate on both sides of steel channel is configured to rotate 270° in channel, and folding flange plate and H-shaped steel web root joint are sealed by sealant, folding flange plate and hot-rolled H-shaped steel flange are connected by long bolt rod, and steel channel is casted with concrete.

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