CN212562108U - Large-span underground structure hollow box type steel reinforced concrete beam slab - Google Patents

Abstract

The utility model provides a stride hollow box type shaped steel concrete beam slab of underground structure greatly, including concrete beam, concrete slab, hollow steel plate case, shear bolt nail and reinforcing bar, hollow steel plate case sets up in concrete beam and concrete slab, makes concrete beam and concrete slab be hollow structure, the hollow steel plate incasement surface of shear bolt nail welding in the concrete beam for hollow steel plate case and concrete beam between be connected, and transmit the shear force, the reinforcing bar is erect in concrete beam and concrete slab, and with hollow steel plate case, shear bolt nail contactless. This hollow box shaped steel concrete beam plate structure can effectively reduce the dead weight, reduces concrete and reinforcing bar quantity, reduces beam slab cross-sectional dimension, improves the structure bearing capacity, promotes building usage space, but the wide application is in building structure, bridge structures and other engineering structures, and specially adapted has the big underground structure of striding of heavy load characteristics.

Description

Large-span underground structure hollow box type steel reinforced concrete beam slab

Technical Field

The utility model relates to a structural engineering field especially relates to a novel hollow box shaped steel concrete beam slab of underground structure strides 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, meanwhile, the cost is reduced, the production efficiency is improved, and limited resources are used for obtaining the best benefit.

Current beam slab form is mostly solid reinforced concrete beam slab, and to the underground structure of conventional span, solid reinforced concrete beam slab has better suitability. However, for a large-span underground structure, due to the characteristic of large load, the beam slab has large reinforcement amount, more concrete usage amount and larger structure self weight, which is not beneficial to saving materials and reducing cost, and the transportation and hoisting cost required to be invested is also higher, thus seriously affecting the economy of the reinforced concrete beam slab.

Because the existing solid reinforced concrete beam slab can not well meet the special requirements of the large-span underground structure, the problem that a novel large-span underground structure hollow box type steel reinforced concrete beam slab needs to be provided aiming at the characteristics of the large-span underground structure is urgently solved.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a novel hollow box shaped steel concrete beam slab of underground structure strides greatly to reduce the dead weight, improve bearing capacity, solve the problem that traditional solid reinforced concrete beam slab exists, promote the wholeness ability of structure.

In order to solve the technical problem, the utility model discloses a technical scheme is:

the hollow steel plate box is arranged in the concrete beam and the concrete slab to enable the concrete beam and the concrete slab to be in a hollow structure, the shear resistant bolt is welded on the outer surface of the hollow steel plate box in the concrete beam and is used for connecting the hollow steel plate box and the concrete beam and transmitting shear force, and the reinforcing steel bar frame is arranged in the concrete beam and the concrete slab and is not in contact with the hollow steel plate box and the shear resistant bolt.

Further, the cross-sectional shape of the hollow steel plate box may be rectangular, circular, oval or polygonal, but is not limited to the above cross-sectional form, and the hollow steel plate box has a hollow structure without filling inside.

Furthermore, the cross-sectional shapes and the sizes of the concrete beam and the hollow steel plate box in the concrete plate can be the same or different, and are determined according to specific engineering requirements.

Further, the number of the hollow steel plate boxes may be one or more, depending on the size and specific engineering requirements of the concrete beam and the concrete plate.

Further, the concrete type of the concrete beam and the concrete slab may be ordinary concrete, high-strength concrete, expansive concrete, self-compacting concrete, recycled aggregate concrete, fly ash concrete or fiber concrete.

Further, the concrete beam and the concrete beam plate are of a cast-in-place structure, and the number of the concrete beams can be one or more.

Furthermore, a plurality of reinforcing steel bars are longitudinally arranged in the concrete beam along the periphery of the hollow steel plate box, a plurality of reinforcing steel bars are longitudinally arranged in the concrete slab, and the arrangement and the number of the reinforcing steel bars are determined according to specific engineering requirements.

Compared with the prior art, stride hollow box shaped steel reinforced concrete beam board of underground structure greatly have following advantage: the structure can give full play to the advantages of high tensile strength of the section steel and good compression resistance of the concrete through the synergistic effect of the concrete, the hollow steel plate box, the shear resistant studs and the reinforcing steel bars; because the section rigidity of the concrete is increased, the local buckling of the hollow steel plate box can be effectively avoided, and the bearing capacity of the hollow steel plate box part is improved; the hollow steel plate box-concrete combined structure has good ductility and deformability, and shows good anti-seismic performance; meanwhile, the number of the hollow steel plate boxes can be flexibly arranged according to the actual engineering requirements, and the section form of the hollow steel plate boxes is selected to better adapt to the structural requirements; the hollow beam slab structure can effectively reduce dead weight, reduce the using amount of concrete and reinforcing steel bars, improve the structural bearing capacity, reduce the cross-sectional size of the beam slab, and promote the use space of a building, 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 diagram of a novel large-span underground structure hollow box type steel reinforced concrete beam slab, wherein A is a concrete beam;

figures 2 to 5 are schematic cross-sectional views of hollow steel sheet boxes of different shapes.

Description of reference numerals:

1. a concrete beam; 2. a concrete slab; 3. a hollow steel plate box; 4. shear resistant studs; 5. and (5) reinforcing steel bars.

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 fig. 1 to 5, the hollow box type steel reinforced concrete beam slab of the long span underground structure comprises a concrete beam 1, a concrete slab 2, a hollow steel slab box 3, a shear bolt 4 and a steel bar 5, wherein the cross section of the hollow steel slab box 3 can be rectangular, circular, oval or polygonal, but is not limited to the above cross section, and is a hollow structure without filling inside. The hollow steel plate box 3 is arranged in the concrete beam 1 and the concrete slab 2, so that the concrete beam 1 and the concrete slab 2 are of a hollow structure, and the cross-sectional shapes and the sizes of the hollow steel plate boxes 3 in the concrete beam 1 and the concrete slab 2 can be the same and different, and are determined according to specific engineering requirements. The number of the hollow steel plate boxes 3 may be one or more depending on the size and specific engineering requirements of the concrete beam 1 and the concrete plate 2. The shear resistant stud 4 is welded on the outer surface of the hollow steel plate box 3 in the concrete beam 1 and used for connecting the hollow steel plate box 3 with the concrete beam 1 and transmitting shear force, and the reinforcing steel bar 5 is erected in the concrete beam 1 and the concrete slab 2 and does not contact with the hollow steel plate box 2 and the shear resistant stud 3. A plurality of reinforcing steel bars 5 are longitudinally arranged in the concrete beam 1 along the periphery of the hollow steel plate box 3, a plurality of reinforcing steel bars 5 are longitudinally arranged in the concrete plate 2, and the arrangement and the number of the reinforcing steel bars 4 are determined according to specific engineering requirements. The concrete type of the concrete beam 1 and the concrete slab 2 can be ordinary concrete, high-strength concrete, expansive concrete, self-compacting concrete, recycled aggregate concrete, fly ash concrete or fiber concrete. The concrete beam and the concrete beam plate are of a cast-in-place structure, and the number of the concrete beams 1 can be one or more.

A manufacturing method of the large-span underground structure hollow box type steel reinforced concrete beam slab comprises the following steps:

(1) the type of the built-in hollow steel plate box 3 is selected according to engineering requirements, and the section form of the selected hollow steel plate box 3 is shown in figures 2-5 and can not be limited to the section form.

(2) Shear studs 4 are welded to the outer surface of the hollow steel box 3 to be placed in the concrete beam to transmit shear forces.

(3) And determining the shape and the size of the concrete beam 1 and the concrete slab 2, and manufacturing a template.

(4) Sealing one end of the template, sleeving the hollow steel plate box 3 and the shear-resistant studs 4 welded on the hollow steel plate box into the template, placing the template at a preset position, and erecting reinforcing steel bars 5.

(5) And pouring concrete between the template and the hollow steel plate box 3, trowelling and curing the concrete.

(6) And after the maintenance is finished, the template is removed, and the novel large-span underground structure hollow box type steel reinforced concrete beam slab is manufactured.

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 (9)

1. The utility model provides a stride hollow box shaped steel concrete beam slab of underground structure greatly which characterized in that: the anti-shearing concrete comprises a concrete beam, a concrete slab, a hollow steel plate box, anti-shearing studs and reinforcing steel bars, wherein the hollow steel plate box is arranged in the concrete beam and the concrete slab, the anti-shearing studs are welded on the outer surface of the hollow steel plate box in the concrete beam, and the reinforcing steel bars are arranged in the concrete beam and the concrete slab.

2. The large-span underground structure hollow box type steel reinforced concrete beam slab as claimed in claim 1, characterized in that: the cross-sectional shape of the hollow steel plate box is circular, oval or polygonal, the hollow steel plate box is of a hollow structure, and the interior of the hollow steel plate box is not filled with filler.

3. The large-span underground structure hollow box type steel reinforced concrete beam slab as claimed in claim 1 or 2, wherein: the cross-sectional shapes and the sizes of the concrete beam and the hollow steel plate box in the concrete plate are the same.

4. The large-span underground structure hollow box type steel reinforced concrete beam slab as claimed in claim 3, wherein: the number of the hollow steel plate boxes is one or more.

5. The large-span underground structure hollow box type steel reinforced concrete beam slab as claimed in claim 1, characterized in that: the concrete types of the concrete beam and the concrete slab are ordinary concrete, high-strength concrete, expansive concrete, self-compacting concrete, recycled aggregate concrete, fly ash concrete or fiber concrete.

6. The large-span underground structure hollow box type steel reinforced concrete beam slab as claimed in claim 1, characterized in that: the concrete beam and the concrete beam plate are of cast-in-place structures, and the number of the concrete beams is one or more.

7. The large-span underground structure hollow box type steel reinforced concrete beam slab as claimed in claim 1 or 2, wherein: a plurality of reinforcing steel bars are longitudinally arranged in the concrete beam along the periphery of the hollow steel plate box, and a plurality of reinforcing steel bars are longitudinally arranged in the concrete slab.

8. The large-span underground structure hollow box type steel reinforced concrete beam slab as claimed in claim 1, characterized in that: the section of the hollow steel plate box is rectangular.

9. The large-span underground structure hollow box type steel reinforced concrete beam slab as claimed in claim 1 or 2, wherein: the cross-sectional shapes and the sizes of the concrete beam and the hollow steel plate box in the concrete plate are different.

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