CN212562178U - Long-span underground structure outsourcing U type shaped steel concrete beam - Google Patents
Long-span underground structure outsourcing U type shaped steel concrete beam Download PDFInfo
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- CN212562178U CN212562178U CN202020471035.4U CN202020471035U CN212562178U CN 212562178 U CN212562178 U CN 212562178U CN 202020471035 U CN202020471035 U CN 202020471035U CN 212562178 U CN212562178 U CN 212562178U
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Abstract
The utility model provides a novel large-span underground structure externally-wrapped U-shaped steel concrete beam, which comprises a concrete beam body, U-shaped steel, a shear connector and reinforcing steel bars, wherein the U-shaped steel is externally wrapped outside the concrete beam and positioned at the lower side in the concrete beam; the shear connector is welded on the inner side of the U-shaped steel and used for connecting the U-shaped steel and the concrete beam and transferring shear force; the reinforcing steel bar frame is arranged in the concrete beam and is not in contact with the U-shaped steel and the shear connector. The U-shaped steel reinforced concrete beam structure wrapped outside can obviously improve the bending resistance of the beam, improve the structural bearing capacity, reduce the beam section size, can be widely applied to building structures, bridge structures and other engineering structures, and is particularly suitable for large-span underground structures with the characteristic of large load.
Description
Technical Field
The utility model relates to a structural engineering field especially relates to a stride underground structure outsourcing U type shaped steel concrete beam greatly.
Background
In recent years, the modernization level of our country is gradually improved, and the demand for urban space capacity is rapidly expanded, so that urban land resources are more and more deficient, and the development and utilization of underground space are increased. With the increasing volume and the increasingly complex loading of underground structures, the traditional underground structure form cannot meet the requirements of the development of underground spaces nowadays. In order to adapt to the trend of development of modern underground space towards large-span, multifunctional and three-dimensional crossing directions, research on a new form of an underground building structure under a large-span (the span is more than 20m) condition must be enhanced, so that the requirements of long-term safety and stability of the large-span structure during construction and service are met, the production efficiency is improved, and limited resources are used for obtaining the best benefit.
The form of current roof beam is mostly reinforced concrete roof beam, and to the underground structure of conventional span, reinforced concrete roof beam has better suitability. However, for the large-span underground structure, because the large-load underground structure has the characteristic of large load, the concrete cracking phenomenon is easy to occur under the action of larger pulling force and bending moment at the middle-lower part of the beam, and the size of the crack exceeds the standard limit value, so that effective measures are taken to control the generation of the crack on the basis of not greatly increasing the manufacturing cost so as to ensure the normal work of the beam structure. Because the special requirement of striding underground structure greatly can not be satisfied well to current reinforced concrete roof beam, consequently to striding underground structure's characteristics greatly, it is the problem that a urgent need be solved to provide a neotype outsourcing U type shaped steel concrete roof beam.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a stride underground structure outsourcing U type shaped steel concrete beam greatly to improve beam structure's the bending resistance ability of stretching, restrain the cracked production of concrete, solve the problem that traditional reinforced concrete beam exists, promote the wholeness ability of structure.
In order to solve the technical problem, the utility model discloses a technical scheme is:
a large-span underground structure is externally coated with U-shaped steel reinforced concrete beams, which comprise concrete beam bodies, U-shaped steel, shear connectors and reinforcing steel bars, wherein the U-shaped steel is externally coated outside the concrete beam bodies and positioned on the middle lower side of the concrete beam bodies; the shear connector is welded on the inner side of the U-shaped steel and used for connecting the U-shaped steel and the concrete beam body and transmitting shear force, and the reinforcing steel bar frame is arranged in the concrete beam body and is in no contact with the U-shaped steel and the shear connector.
Further, shear connector is T shaped steel, evenly arranges along the steel sheet of the U shaped steel left and right sides be equipped with the reinforcing bar between this internal adjacent two T shaped steel of concrete beam this internal top and the bottom department that is close to the concrete beam body of concrete beam all erect the multichannel reinforcing bar.
Furthermore, a plurality of angle steels are symmetrically arranged on the steel plates on the left side and the right side of the U-shaped steel, U-shaped steel bars are welded on the symmetrically arranged angle steels, one part of each U-shaped steel bar extends out of the U-shaped steel, the extending part is provided with threads, and when the problem of local buckling and the like of a certain part of the U-shaped steel occurs, the rubber plate and the anti-bending steel plate are sequentially fixed on the outer side wall of the U-shaped steel through connecting bolts to reinforce the part; the bottom in the U shaped steel is equipped with a plurality of channel steel be equipped with T shaped steel on the lateral wall of channel-section steel, T shaped steel staggered arrangement on two adjacent channel-section steel lateral walls erect the reinforcing bar in the channel-section steel this internal top that is close to the concrete beam body of concrete beam erects and is equipped with the multichannel reinforcing bar.
Further, the concrete type of the concrete beam body can be ordinary concrete, high-strength concrete, expansive concrete, self-compacting concrete, recycled aggregate concrete, fly ash concrete or fiber concrete.
Further, the left and right sides steel sheet of U type shaped steel can be with concrete beam body height parallel and level, also can be less than the concrete beam body.
Furthermore, the reinforcing steel bars are longitudinally arranged along the concrete beam body, and the arrangement and the number of the reinforcing steel bars are determined according to specific engineering requirements.
Further, the shear connector may be a shear connector having a shear function, such as a shear stud, an angle steel, a channel steel, an i-steel, a T-steel, and the like, including but not limited to the above connector forms.
Compared with the prior art, stride underground structure outsourcing U type shaped steel concrete beam greatly have following advantage: under the structural form, the concrete, the U-shaped steel, the shear connector and the steel bars act synergistically, so that the advantages of high tensile strength of the steel bars and good compression resistance of the concrete can be fully exerted; because the section rigidity of the concrete is increased, the local buckling of the U-shaped steel can be effectively avoided, and the bearing capacity of the U-shaped steel part is improved; the U-shaped steel-concrete combined structure has good ductility and deformability, and shows good anti-seismic performance; meanwhile, the shear connector can be replaced by profile steel in other forms according to the actual engineering requirements so as to better adapt to the structural requirements; the U-shaped steel reinforced concrete beam structure wrapped outside can obviously improve the bending resistance of the beam, improve the structural bearing capacity and reduce the beam section size, can be widely applied to building structures, bridge structures and other engineering structures, and is particularly suitable for large-span underground structures with the characteristic of large load.
Drawings
The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:
FIG. 1 is a schematic structural view of embodiment 1 of the present invention (the steel plates on both sides of the U-shaped steel are level with the height of the concrete beam body);
FIG. 2 is a schematic structural view of embodiment 1 of the present invention (the steel plates on both sides of the U-shaped steel are lower than the height of the concrete beam body);
FIGS. 3-7 are schematic structural views of different shear connectors;
FIG. 8 is a schematic structural view of embodiment 2 of the present invention (the steel plates on both sides of the U-shaped steel are level with the height of the concrete beam body);
fig. 9 is the structure schematic diagram of embodiment 2 of the present invention (the steel plates on both sides of the U-shaped steel are lower than the height of the concrete beam body).
Description of reference numerals:
1. a concrete beam body; 2. u-shaped steel; 3. t-shaped steel; 4. reinforcing steel bars; 5. angle steel; 6. u-shaped steel bars; 7. a bolt; 8. a rubber plate; 9. a bending-resistant steel plate; 10. channel steel.
Detailed Description
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. 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," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in figures 1 and 2, a stride underground structure outsourcing U type shaped steel concrete beam greatly, including concrete beam body 1, U type shaped steel 2, shear connector and reinforcing bar 4, U type shaped steel 2 outsourcing is outside concrete beam body 1, the left and right sides steel sheet of U type shaped steel 2 can with concrete beam body 1 high parallel and level, also can be less than concrete beam body 1. The shear connector welds in 2 inboards of U type shaped steel for be connected between U type shaped steel and the concrete beam body, and the transmission shear force, reinforcing bar 4 erects in concrete beam body 1, and is contactless with U type shaped steel, shear connector. Shear connector is T shaped steel 3, evenly arranges along the steel sheet of the 2 left and right sides of U shaped steel be equipped with reinforcing bar 4 between two adjacent T shaped steel 3 in the concrete beam body 1 top and the bottom department that is close to the concrete beam body 1 in the concrete beam body all erect multichannel reinforcing bar 4. The U-shaped steel reinforced concrete beam structure wrapped outside can obviously improve the bending resistance of the beam, improve the bearing capacity of the structure, reduce the size of the section of the beam, can be widely applied to building structures, bridge structures and other engineering structures, and is particularly suitable for large-span underground structures with the characteristic of large load.
As shown in fig. 3 to 7, the shear connector may be a shear pin, an angle steel, a channel steel, an i-steel, a T-steel, or other connecting member having a shear-resistant function, including but not limited to the above connector forms.
As shown in fig. 8 and 9, another embodiment of the shear connector in the U-shaped steel is as follows:
a plurality of angle steels 5 are symmetrically arranged on the steel plates on the left side and the right side of the U-shaped steel 2, U-shaped steel bars 6 are welded on the symmetrically arranged angle steels 5, one part of each U-shaped steel bar 6 extends out of the U-shaped steel 2, and the extending part is provided with threads, so that when a certain part of the U-shaped steel has problems such as local buckling, a rubber plate 8 and a bending-resistant steel plate 9 are sequentially fixed on the outer side wall of the U-shaped steel 2 through bolts 7 to reinforce the part; bottom in the U shaped steel 2 is equipped with a plurality of channel-section steel 10 be equipped with T shaped steel 3 on the lateral wall of channel-section steel 10, the 3 staggered arrangement of T shaped steel on two adjacent channel-section steel 10 inner tower is equipped with reinforcing bar 4 the top that is close to concrete beam body 1 in the concrete beam body 1 is erect and is equipped with multichannel reinforcing bar 4. Concrete, angle steel, channel-section steel, T shaped steel and reinforcing bar synergism under this structural style can give full play to the advantage that shaped steel tensile strength is high, concrete compressive property is good.
The concrete type of the concrete beam body 1 can be ordinary concrete, high-strength concrete, expansive concrete, self-compacting concrete, recycled aggregate concrete, fly ash concrete or fiber concrete. The reinforcing steel bars 4 are longitudinally arranged along the concrete beam body 1, and the arrangement and the number of the reinforcing steel bars are determined according to specific engineering requirements.
The manufacturing method of the U-shaped steel reinforced concrete beam wrapped outside the large-span underground structure comprises the following steps:
(1) the shear connectors are selected according to engineering requirements, and alternative shear connector forms are shown in fig. 3-7, including but not limited to the connector forms described above.
(2) The shear connector is welded to the inner surface of the U-shaped steel 2 to transmit shear force.
(3) And determining the shape and the size of the concrete beam 1 and manufacturing a template.
(4) And sealing one end of the template, sleeving the U-shaped steel 2 and the shear connector welded on the U-shaped steel 2 into the template, placing the template at a preset position, and erecting a reinforcing steel bar 4.
(5) And pouring concrete in the template, trowelling and curing the concrete.
(6) And after the maintenance is finished, the template is removed, and the novel large-span underground structure is manufactured and finished with the U-shaped steel reinforced concrete beam wrapped outside.
In embodiment 2, in the fourth step, the U-shaped steel bar 6 is welded to the symmetrically arranged angle steels 5, a part of the U-shaped steel bar 6 extends out of the U-shaped steel 2, and the extending part is threaded.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides a stride underground structure outsourcing U type shaped steel concrete beam greatly which characterized in that: including concrete beam body, U type shaped steel, shear connector and reinforcing bar, U type shaped steel outsourcing is outside concrete beam body, shear connector welds in U type shaped steel inboard, the reinforcing bar sets up at concrete beam originally internally.
2. The U-shaped steel reinforced concrete beam coated outside the long-span underground structure according to claim 1, wherein: shear connector is T shaped steel, evenly arranges along the steel sheet of the U shaped steel left and right sides be equipped with the reinforcing bar between this internal adjacent two T shaped steel of concrete beam this internal top and the bottom department that is close to the concrete beam body of concrete beam all are equipped with the multichannel reinforcing bar.
3. The U-shaped steel reinforced concrete beam coated outside the long-span underground structure according to claim 1, wherein: the symmetry is equipped with a plurality of angle steel on the steel sheet of U shaped steel left and right sides, and the welding of U shaped steel is on the angle steel that the symmetry set up, U shaped steel partly stretches out U shaped steel, and the part of stretching out is equipped with the screw bottom in the U shaped steel is equipped with a plurality of channel steel be equipped with T shaped steel on the lateral wall of channel-section steel, T shaped steel staggered arrangement on two adjacent channel-section steel lateral walls be equipped with the reinforcing bar in the channel-section steel this internal top that is close to the concrete beam body of concrete beam is equipped with the multichannel reinforcing bar.
4. The U-shaped steel reinforced concrete beam coated outside the long-span underground structure according to claim 3, wherein: and the rubber plate and the anti-bending steel plate are fixed on the outer side wall of the U-shaped steel in sequence through bolts.
5. The U-shaped steel reinforced concrete beam coated outside the long-span underground structure according to claim 1, wherein: the concrete type of the concrete beam body is ordinary concrete, high-strength concrete, expansive concrete, self-compacting concrete, recycled aggregate concrete, fly ash concrete or fiber concrete.
6. The U-shaped steel reinforced concrete beam coated outside the large-span underground structure according to any one of claims 2 to 4, wherein: the left and right sides steel sheet of U type shaped steel can be with concrete beam body height parallel and level, also can be less than the concrete beam body.
7. The U-shaped steel reinforced concrete beam coated outside the large-span underground structure according to any one of claims 2 to 4, wherein: the reinforcing bars are arranged longitudinally along the concrete beam body.
8. The U-shaped steel reinforced concrete beam coated outside the long-span underground structure according to claim 1, wherein: the shear resistant connecting piece is a shear resistant stud, an angle steel, a channel steel, an I-shaped steel or a T-shaped steel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020471035.4U CN212562178U (en) | 2020-04-02 | 2020-04-02 | Long-span underground structure outsourcing U type shaped steel concrete beam |
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| CN202020471035.4U CN212562178U (en) | 2020-04-02 | 2020-04-02 | Long-span underground structure outsourcing U type shaped steel concrete beam |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113216514A (en) * | 2020-04-02 | 2021-08-06 | 中国铁路设计集团有限公司 | Large-span underground structure wrapped U-shaped steel reinforced concrete beam and manufacturing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113216514A (en) * | 2020-04-02 | 2021-08-06 | 中国铁路设计集团有限公司 | Large-span underground structure wrapped U-shaped steel reinforced concrete beam and manufacturing method thereof |
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