JPH0726517A - Floor slab construction - Google Patents

Abstract

PURPOSE:To simplify a reinforcement arranging work and form a floor slab of high quality. CONSTITUTION:Ribbed steel pipes 10 with ribs 11 provided on the outer circumference are arranged inside a building frame 7 made of concrete so as to extend along a road surface 5a through concrete sticking force, and hence a floor slab 6 forming spaces 9 not filled with concrete is formed inside the main body. Consequently, the building frame 7 can be reinforced by means of the jibbed steel pipes 10, hence a reinforcement arranging quantity can be recduced by the portion, and a bridge of high quality construction system can be obtained by means of the floor slab 6 having light weight and high rigidity.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor slab structure suitable for use in a bridge floor slab.

[0002]

2. Description of the Related Art FIG. 5 is a view showing an example of a structural sectional model of a conventional bridge deck, and FIG. 6 is a transverse sectional view showing an example of a conventional bridge deck. Conventionally, in a reinforced concrete floor slab for use in a bridge or the like, as shown in FIG. 5, in order to increase the rigidity of the floor slab concrete 32 and to make it an economical structure, a girder that is in a direction intersecting with the paper surface of FIG. Direction I-shaped steel 33
The floor slab concrete 32 is designed and formed as a rigid beam in which is reinforced. That is, by forming the hollow portion 30 in the central portion of the floor slab concrete 32, which has little influence on the cross-section count when performing the structural calculation of the slab bridge 31, the concrete amount is reduced and the weight applied to the pier 34 side. On the other hand, the outer edge portion 32a of the floor slab concrete 32 is formed into a reinforced concrete structure for bearing a stress. Therefore, in order to obtain such a structure, as shown in FIG. 6, a corrugated pipe 35 made of zinc is embedded in the slab concrete 32 as an internal discarding form, or the hollow portion 30 is formed by using lightweight foam concrete. By doing so, while the weight of the slab concrete 32 is reduced, the outer edge portion 32a of the slab concrete 32 is arranged with a predetermined number of main reinforcements 36 extending in the girder direction as tensile reinforcements and the main reinforcements. A floor slab concrete 32 is formed by arranging a predetermined number of hoop reinforcements 37 for shear reinforcement by binding a predetermined number of 36 to form a beam corresponding to the web portion of the I-shaped steel 33. ing.

[0003]

However, when the amount of concrete is reduced by forming the hollow portion 30 in the floor slab concrete 32 in this manner, the floor slab concrete 32 is reduced by the amount corresponding to the cross-sectional area of the hollow portion 30. The area in which the main muscles 36 and the hoop muscles 37 can be arranged is reduced. However, in the recent slab 31
Since the traffic load of the vehicle running on the slab concrete 32 becomes very large, the slab concrete 32
Has required a large amount of bar arrangement. Therefore, inside the floor slab concrete 32, as shown in FIG. 6, the main reinforcement 36 for reinforcing the lower end portion 32b of the slab concrete 32 and the hoop reinforcement 37 for shear reinforcement are extremely overcrowded. Is arranged. As a result, when forming the floor slab concrete 32, a very complicated reinforcing work is required, so a great amount of labor is used to maintain the structural form of the floor slab 31. It was being done. Also, if the reinforcements are overcrowded in this way, the floor slab concrete 3
Since the main bar 36 and the hoop bar 37 impede the fluidity of the concrete at the time of placing the concrete for the formation of 2, it is very difficult to perform solid filling of the concrete and maintain the quality of the concrete. Is. Therefore, in view of the above circumstances, the present invention provides a floor slab structure capable of simplifying the reinforcing work while maintaining the filling property of concrete.

[0004]

Means for Solving the Problems That is, the present invention has a floor slab (6) mounted and supported in a form of being bridged between a plurality of pillars (2) and having a main body (7) made of concrete. , A structural pipe material (10) having a concrete adhering means (11) provided on the outer periphery of the main body (7),
The floor slab (6) through the concrete adhering means (11)
It is provided along the floor surface (5a) of (1), and the concrete non-filling space (9) is formed inside the structural pipe material (10). The numbers in parentheses () indicate the corresponding elements in the drawings for convenience, and therefore the present description is not limited to the description in the drawings. The same applies to the following action columns.

[0005]

With the above-mentioned structure, according to the present invention, by disposing the structural pipe material (10) inside the main body (7), the main body (7) is placed on the floor surface (5a) of the floor slab (6). It reinforces along and acts to form a concrete unfilled space (9) inside the body (7).

[0006]

1 is a side view showing an example of a bridge to which a floor slab structure according to the present invention is applied, FIG. 2 is a structural sectional model view of the floor slab structure according to the present invention, and FIG. 3 is a floor slab in the bridge shown in FIG. FIG. 4 is a partially enlarged cross-sectional view of a portion, and FIG. 4 is a diagram showing an example of a structural reinforcing pipe material used in the floor slab shown in FIG.

As shown in FIG. 1, the bridge 1 has a predetermined pitch L1 along the extension direction of the bridge 1 shown in the left-right direction of FIG.
As a plurality of pillars erected on the ground not shown for each,
It has multiple piers 2 made of reinforced concrete.
In the embodiment, they are arranged in two rows in a direction intersecting the plane of FIG. 1 (in a pair in the bridge transverse cross section as shown in FIG. 2). Beams 3 made of reinforced concrete are laid on the piers 2 between the piers 2 arranged in the direction intersecting the plane of FIG. 1 at intervals corresponding to the pitch L1 of the piers 2 in the lateral direction of FIG. Roads that are respectively provided on the beams 3 and have a road surface 5a, which is a floor surface of a floor slab 6 described later, on the upper surface side thereof so as to extend along the extension direction of the bridge 1 shown in the left-right direction in FIG. A structure 5 is provided in a form mounted and supported on the pier 2 via the beam 3.

The road structure 5 has a floor slab structure including a concrete floor slab 6 placed on the bridge pier 2 via the beams 3. As shown in FIG. 2, a plurality of girders 51 extending along the extending direction of the bridge 1 shown in the direction intersecting with the plane of FIG. 2 are arranged in the lateral direction of the cross section of the bridge 1. Each girder 51 has a concrete non-filled space 9 inside each girder 51.
2 is formed in a hollow shape so as to be provided along the extension direction of the girders 51 (that is, along the road surface 5a of the road 5 which is an assembly of the girders 51) shown in the direction intersecting the plane of FIG. Further, the girder 51 has a shape in which a predetermined number of reinforcing bars are provided inside the girder 51 so that the entire floor slab 6 maintains a predetermined rigidity as a bending member. It is assumed that the beam is a simple beam with both ends at both ends.

That is, the road structure 5 is composed of a plurality of concrete floor slabs 6 connected in a line along the extension direction of the bridge 1, and each floor slab 6 has a plurality of bridge piers. The bridge pier 2 is mounted and supported in such a manner that it is bridged between the two. As shown in FIG. 3, each floor slab 6 has a skeleton 7 as a main body portion made of concrete formed in a substantially lithographic shape along the outer shape of the slab 6, and on the skeleton 7, The pavement portion 8 made of asphalt or the like covers the skeleton 7 in such a manner that the road surface 5a of the road structure 5 can be formed and arranged on the upper surface portion of the pavement portion 8 as the floor surface of each floor slab 6. It is installed in. Inside the frame 7, a ribbed steel pipe 10 formed in a hollow tubular shape extends as a structural pipe material along the extension direction of the girder 51, that is, along the road surface 5a. The concrete non-filled spaces 9 are formed in the skeleton 7 by the hollow portions of the ribbed steel pipes 10 by the number of the ribbed steel pipes 10.

The ribbed steel pipe 10 is formed, for example, by rolling a steel plate having ribs protruding toward the outer surface thereof into a tubular shape and welding the joints thereof. As shown in FIG. 4, a plurality of ribs 11, each of which is formed along the circumferential direction so as to project so that the outer diameter of the ribbed steel pipe 10 increases at a predetermined pitch L2, As concrete adhering means capable of ensuring the adhesivity of the ribbed steel pipe 10 to the skeleton 7,
It is provided over its entire length. Therefore, the ribbed steel pipe 10 inside the slab 7 of the floor slab 6 secures the adhesion of the skeleton 7 to the concrete through the plurality of ribs 11 as shown in FIG. It is fixed to the constituent concrete and is provided along the road surface 5a which is the floor surface of the floor slab 6.

Further, as shown in FIG. 3, inside the skeleton 7, the upper reinforcement main bar 12A located near the upper end of the skeleton 7 and the lower reinforcement main bar 1 located near the lower end thereof.
2B and other main bars 12 are bridges 1 shown in the crossing direction with the plane of FIG.
A predetermined number of the hoop muscles 13 are provided in a shape extending in the direction of extension of the road surface 5a, and inside the skeleton 7, there are hoop muscles 13 formed by binding the main muscles 12 in a predetermined number. A predetermined number are provided along the surface. In addition, since each floor slab 6 of the road structure 5 is designed as a simple beam in which the girders 51 are arranged side by side in the lateral direction as described above, the arrangement of the main reinforcement 12B for the lower end reinforcement The number of reinforcements is slightly larger than that of the upper reinforcing main reinforcement 12A. As a result, the skeleton 7 of the floor slab 6 includes the ribbed steel pipe 10 fixed in the skeleton 7, the main bar 12, and the hoop bar 1.
By using the ribbed steel pipe 10 as a reinforcing pipe material for reinforcing concrete of the skeleton 7 in a form reinforced in the tensile direction through the strength of 3, the number of reinforcing bars of the main bar 12 and the hoop bar 13 is increased. Each floor slab 6 has a predetermined rigidity as a bending member in such a shape that the number of ribbed steel pipes 10 can be reduced.

Since the bridge 1 has the above-mentioned structure, when constructing the bridge 1, the bridge piers 2 are arranged on the ground (not shown) in two rows in a direction intersecting with the plane of FIG. Beams 3 are constructed and installed in such a manner that they are erected for each L1 and suspended on the piers 2 and 2 that are adjacent to each other in the direction intersecting the plane of FIG. Then, the floor slab 6 is mounted and supported on the bridge pier 2 in a manner of being suspended on the beams 3 and 3 which are adjacent to each other in the left-right direction in FIG.
By constructing a road structure 5 in such a manner that the road structures 5 are connected along the extension direction of the pier 1 shown in the left-right direction, and by providing a pavement 8 on the surface layer portion of the road structure 5, the floor of each floor slab 6 is The road surface 5a is formed along the extension direction of the bridge 1 so as to form a surface.

By the way, in order to form each floor slab 6, it is formed by placing concrete in a mold having a shape corresponding to the outer shape of the skeleton 7. At this time, first, the skeleton 7 is formed.
The ribbed steel pipe 10 is provided in the mold of
In order to prevent the hollow part of the floor from being filled with concrete, both ends thereof are closed so as to be along the road surface 5a which is the floor surface of the floor slab 6, that is, arranged along the extension direction of the floor slab 6. I'll do it. Along with this, at a predetermined bar arrangement position in the form, main bars 12 such as upper end reinforcing main bars 12A and lower end reinforcing main bars 12B are arranged in a manner to be extended along the extending direction of the floor slab 6, respectively. The hoop muscles 13 are arranged along the cross-sectional direction of the floor slab 6 so that the main muscles 12 are bound in a predetermined number. Then, the main bar 12 and the hoop bar 13 are provided with the ribbed steel pipe 10 as a structural pipe member in the frame body 7 of the floor slab 6 to which these are arranged, so that each floor slab 6 is a predetermined bending member. The main bar 12 required to retain rigidity
Also, since the amount of bar arrangement of the hoop muscles 13 can be reduced by the amount of the ribbed steel pipes 10 arranged, the bar arrangement work can be saved as much as possible,
This can be done simply.

In this way, when the ribbed steel pipe 10, the main bar 12 and the hoop bar 13 are arranged in the frame of the frame 7 and concrete is placed in the frame, the main bar 12 is inserted in the frame. Also, since the hoop reinforcement 13 has a small amount of reinforcement, the concrete placed here is densely packed into every corner of the mold without impeding its fluidity. Further, a rib 11 is provided on the outer peripheral portion of the ribbed steel pipe 10 over the entire length thereof, and the rib 11 projects so that the outer diameter of the ribbed steel pipe 10 increases at each pitch L2. The ribs 11 do not impede the fluidity of the concrete because each of them is formed along the circumferential direction. Therefore, the concrete cast in the frame of the skeleton 7 adheres evenly to the surface portions of the main bars 12 and the hoop bars 13, and also on the outer surface of the ribbed steel pipe 10 along the ribs 11 of the ribbed steel pipe 10. In addition, the ribbed steel pipe 10 and the concrete are integrated so that the main bar 12, the hoop bar 13, and the ribbed steel pipe 1 are formed.
With the shape of 0 as a reinforcing bar, the skeleton 7 made of concrete is
It is cured and formed to a predetermined strength. In this way, the skeleton 7 is formed by the concrete reinforced by the ribbed steel pipe 10, the main bar 12, and the hoop bar 13 and solidly filled in the mold as described above. The constructed floor slab 6 becomes a high-quality concrete structural member while maintaining a predetermined rigidity. Therefore, even when the floor slab 6 is cast on site during construction of the bridge 1, the skeleton 7 of the floor slab 6 can be formed with high construction efficiency and high quality as described above.

Further, when the skeleton body 7 of the floor slab 6 is cast and formed by concrete in this way, the hollow portion of the ribbed steel pipe 10 arranged therein cannot be filled with concrete in the skeleton body 7. The non-concrete filled space 9 is formed by the number of the ribbed steel pipes 10. As a result, as shown in FIG. 2, the floor slab 6 has a shape in which the cross-section is lost by the space 9 not filled with the concrete, and the weight is reduced accordingly. Therefore, the weight of the floor slab 6 to be supported and supported by the bridge piers 2 in the viaduct 1 can be reduced by 9 minutes for the non-concrete filling space, resulting in an economical structure. In order to form a hollow portion in the floor slab 6 and reduce its weight in this way, a ribbed steel pipe 10 used to reinforce the skeleton 7 as a structural pipe material.
It is possible to easily form the concrete non-filled space 9 by arranging the ribbed steel pipe 10 by utilizing the hollow portion of. Therefore, since it is not necessary to use a discard formwork or a light-weight foam material to bury it in order to form the hollow portion in the floor slab 6, it is economical without waste of the material and the hollow portion There is no need for complicated work for forming.

When the floor slab 6 thus formed is placed and supported on the pier 2 via the beam 3 and the road structure 5 is erected as described above, the floor surface of the floor slab 6 is increased. By road 5
a is continuously formed in the extending direction of the bridge 1 shown in the left-right direction in FIG. The road structure 5 is the frame 7 of the floor slab 6.
Due to the ribbed steel pipe 10, the main bar 12 and the hoop bar 13 disposed therein, as shown in FIG. 2, a girder 51 has a simple beam-like structural form in which the girders 51 are arranged side by side in the transverse direction of the bridge shown in the lateral direction of FIG. Therefore, the stress acting on each floor slab 6 of the road structure 5 is borne by the floor slab 6 as a bending member in the form of a simple beam having the piers 2 and 2 adjacent to each other in the left-right direction in FIG.
It can be favorably supported by the rigidity of the floor slab 6.
Then, the ribbed steel pipe 1 provided in the frame 7 of the floor slab 6
0 means that the ribbed steel pipe 10 itself is particularly excellent in shear strength and is firmly attached to the concrete of the skeleton 7 through the ribs 11, so that the floor slab 6 is particularly sufficient for shearing. The strength can be expressed.

Therefore, the bridge 1 constructed in this way can support a large traffic load while performing economical and labor-saving construction as described above. And the bridge 1
Since each floor slab 6 is a high-quality concrete structural member in which a solidly filled concrete and a sufficient amount of reinforcement are secured as described above, when the traffic load is increased in the future, However, there is no risk that the lower end portion of the floor slab 6 will peel off and the lower end reinforcing main bars 12B and the like will corrode, and the durability of the bridge 1 will be impaired. Therefore, the bridge 1 can exhibit a stable and solid structural state over a long period of time.

Although the floor slab structure according to the present invention is applied to the floor slab 6 of the bridge 1 in the above-described embodiment, the present invention is mounted on a plurality of pillars. As long as a supported floor slab is used, the floor slab may be applied to other floor slab structures such as a void slab type building supported by columns. In addition, when the floor slab is applied to a bridge floor slab such as the bridge 1, the configurations of the beam 3 and the bridge pier 2 are arbitrary. Further, in the embodiment, the example in which the main body portion of the floor slab such as the floor slab 6 is the skeleton 7 of the reinforced concrete structure is described, but the material of the main body of the floor slab may be other concrete. Further, in the embodiment, an example in which the ribbed steel pipe 10 in which the ribs 11 along the circumferential direction are formed on the outer periphery thereof so as to project so that the outer diameter increases at a predetermined pitch L2 is used as a structural pipe material However, as long as the structural pipe material is provided with some concrete adhering means on its outer periphery and is capable of forming a concrete non-filled space inside, the material and The rib shape and the manufacturing method thereof may be other than those described in the embodiments. The concrete adhesion means is
The rib 11 does not necessarily have to be provided as a part of the tubular body of the ribbed steel pipe 10 as long as it can adhere the concrete to the outer periphery of the ribbed steel pipe 10. . Further, the shape of the non-concrete-filled space and the arrangement position thereof are of course arbitrary.

[0019]

As described above, according to the present invention, in the floor slab 6 which is mounted and supported in the form of being bridged between the pillars such as the plurality of bridge piers 2 and the like, the main body such as the skeleton 7 made of concrete is A structural pipe material such as a ribbed steel pipe 10 having a concrete adhering means such as ribs 11 provided on the outer periphery of the main body is provided on the road surface 5a of the floor slab 6 through the concrete adhering means. Since the concrete non-filling space 9 is formed inside the structural pipe material provided along the floor surface, by disposing the structural pipe material inside the main body,
The main body can be reinforced along the floor surface of the floor slab 6, and a concrete non-filled space 9 can be formed inside the main body. That is, the structural pipe material can be integrated with the concrete in a form in which the adhesiveness to the concrete of the main body is ensured through the concrete adhering means provided on the outer periphery of the structural pipe material. It can be effectively used as a reinforcing bar for reinforcement. Thus, the body is shaped to have its rigidity increased through the strength of the structural tubing, and is thereby reinforced so that it can retain greater shear strength. As a result, it is possible to reduce the amount of reinforcing bars such as the main bars 12 and the hoop bars 13 to be arranged in the main body of the floor slab such as the floor slab by the stress burden of the structural pipe material. By reducing the reinforcing bar reinforcement amount in this way, it is possible to simplify the reinforcement work during floor slab formation and save labor in the reinforcement work. In addition, since the concrete non-filled space 9 is formed inside the main body by disposing the structural pipe material inside the main body, the floor slab is damaged by the concrete of the main body by the amount of the non-concrete filled space 9. The shape becomes hollow and the weight is reduced accordingly. As a result, the weight of the floor slab on the pillar can be reduced. In order to reduce the weight, it is sufficient to simply place the structural pipe material in the formwork when pouring the concrete of the main body. Therefore, discard formwork or lightweight foam other than the structural pipe material. There is no need for materials. Then, by forming a hollow portion such as the concrete non-filled space 9 inside the main body of the floor slab, the cross-sectional area of the concrete portion in which the main reinforcement 12, the hoop reinforcement 13 and the like should be arranged is reduced. However, in the present invention, as described above,
Since the amount of reinforcing bars such as the main bars 12 and the hoop bars 13 can be reduced by the number of the structural pipes arranged,
The rebar does not concentrate in a portion other than the non-concrete-filled space 9 and become overcrowded bar. Therefore, when forming the main body of the floor slab, since the overfilled reinforcing bar does not hinder the concrete flow, concrete can be uniformly and uniformly filled in the formwork for forming the main body. The main body can be formed as a high-quality concrete structural member. Therefore, according to the present invention, when the floor slab is formed and constructed, the reinforcing work can be easily performed, and a high quality concrete structure type can be obtained.

Further, in the floor slab structure according to the present invention, when the pillar body is constructed as a bridge pier 2 erected on the ground, a floor placed and supported in a form of being bridged between a plurality of piers. A slab type bridge such as the bridge 1 is constructed by connecting a plurality of slabs 6 in series as a bridge slab to form a road structure 5, and the floor surface of each slab 6 is connected to the slab of the road structure 5. The road surface 5a can be used as a transportation means for running a vehicle or the like. Then, the floor slab 6 has a concrete non-filled space 9 formed inside the main body, and the weight of the main body is reduced by the amount of the concrete non-filled space 9. Since it can be made small, the arrangement interval of the piers 2 can be made large, which is convenient. Then, the floor slab 6 is a structural member that is elongated along the extension direction of the road surface 5a. As described above, the floor slab 6 has a ribbed steel pipe 10 or the like inside the main body of the skeleton 7 or the like. Since the structural pipe material is provided and reinforced so as to maintain sufficient rigidity, the floor slab 6 serves as a bending member, and two piers 2, 2 adjacent to each other in the road surface extension direction are provided.
The heavy traffic load due to such a vehicle can be accurately supported by a simple beam system with stress at both ends. Further, in the bridge, the floor slab is arranged at a high position on the pier 2. However, according to the present invention, as described above, since the amount of reinforcing bar reinforcement is small, complicated reinforcing bar work can be performed. Since it is not required, even when the main body of the floor slab is formed of cast-in-place concrete, it is possible to efficiently perform on-site work without using a great amount of labor for the reinforcement work. Therefore, the floor slab structure according to the present invention can be used particularly effectively by applying it to the floor slab 6 in a floor slab bridge such as the bridge 1.

[Brief description of drawings]

FIG. 1 is a side view showing an example of a bridge to which a floor slab structure according to the present invention is applied.

FIG. 2 is a structural sectional model view of a floor slab structure according to the present invention.

FIG. 3 is a partially enlarged cross section of a floor slab portion of the bridge shown in FIG.

4 is a diagram showing an example of a structural reinforcing pipe material used in the floor slab shown in FIG.

FIG. 5 is a diagram showing an example of a structural cross-section model of a conventional bridge deck.

FIG. 6 is a cross-sectional view showing an example of a conventional bridge floor slab.

[Explanation of symbols]

 2 ... Pillar (bridge pier) 6 ... Floor slab 5a ... Floor surface of floor slab (road surface) 7 ... Main body (frame) 9 ... Concrete non-filled space 10 ... Structural pipe material (ribbed steel pipe) 11 ... Means for attaching concrete (ribs)

Claims (2)

[Claims] 1. A floor slab mounted and supported in a form of being bridged between a plurality of pillars, having a main body made of concrete, and a concrete adhering means provided on the outer periphery of the main body. A floor slab structure in which a pipe for use is provided along the floor surface of the floor slab via the concrete adhering means, and a concrete non-filled space is formed inside the structural pipe. 2. The floor slab structure according to claim 1, wherein the pillar is a bridge pier erected on the ground.