JP4037862B2 - Steel slab and method of reinforcing the same - Google Patents

Description

  The present invention is applied to a floor slab or the like on a bridge or an elevated road, and has a plurality of vertical ribs extending in the vertical direction of a deck plate constituting a floor slab of a traveling road and formed in a closed section in the width direction of the deck plate. The present invention relates to a steel slab that is individually arranged and fixed to the lower surface of the deck plate, and a method for reinforcing an existing steel slab.

There are two types of floor slabs on bridges and elevated roads: RC floor slabs made of concrete reinforced by reinforcing bars, and steel slabs using steel plates.
Among these, the steel slab is provided with a plurality of vertical ribs extending in the vertical direction of the deck plate constituting the floor slab of the traveling path and formed in a closed cross section in the width direction of the deck plate. Conventionally, many techniques for improving the strength of such steel slabs have been proposed.

  One such technique is the technique disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 2001-248114). In such a technique, a plurality of vertical ribs extending in the vertical direction of the deck plate constituting the floor slab of the roadway and formed in a closed cross section are arranged in the width direction of the deck plate and fixed to the lower surface of the deck plate. In the steel floor slab structure, a filler made of lightweight foamed concrete is injected into the closed cross-sectional space of the vertical rib, and solidified in the closed cross-sectional space to be locally bent of the deck plate in the vertical rib closed space. Increases rigidity.

JP 2001-248114 A

In the prior art provided in Patent Document 1, a filler made of lightweight foamed concrete is injected into the closed cross-sectional space of the vertical ribs and solidified in the closed cross-sectional space. Since a relatively long curing time (solidification time) is required from injection to solidification, traffic on the road must be stopped during the curing time.
Also, for existing steel slabs, the work of filling and filling lightweight foamed concrete into the closed cross-section space of the vertical ribs is cumbersome and requires a lot of man-hours. There is.
In addition, since the filler made of lightweight foamed concrete has a low bulk modulus, when it is used in a closed area such as a closed cross-section space of a longitudinal rib, it resists local bending deformation of the deck plate due to vehicle load. Since it is difficult, the stress reduction effect by relaxation of the stress concentration in the welded joint between the vertical rib and the deck plate is small.

  Further, in the prior art, a filler made of lightweight foam concrete is injected into the closed cross-sectional space of the vertical rib, and the local bending rigidity of the deck plate itself is increased only in the closed space of the vertical rib. However, no means for increasing the rigidity in the open space between the lower surface of the deck plate and the vertical rib is taken.

  Accordingly, in view of the problems of the prior art, the present invention simplifies the filling and filling operations of the filling material into the closed cross-section space of the vertical ribs, reduces the filling and filling work steps, and improves the maintenance performance. It is possible to reinforce the steel slab without stopping the traffic on the roadway or with a short traffic stop, and rigidity in both the vertical rib and the open space between the deck plate bottom surface and the vertical rib An object of the present invention is to provide a steel slab capable of increasing the strength of the steel slab and increasing the strength of the steel slab and a method for reinforcing the steel slab.

The present invention achieves such an object. First, as a basic technology, a longitudinal rib extending in the longitudinal direction (traveling line direction) of a deck plate constituting a floor slab of a traveling path and formed in a closed cross section is used. in the width direction plurality arranged to such and secured to the underside of the deck plate Rutotomoni, the deck plate and the vertical ribs underside, a plurality of crossbeams extending transversely perpendicular to the travel line direction in steel deck structure equipped, all closed section space of the longitudinal ribs to be filled, to fill the filler which becomes solid after filling has fluidity at the time of filling, the lower surface and the longitudinal ribs of the deck plate A vertical reinforcing member extending in the vertical direction in contact with the lower surface of the deck plate is extended in an open space between the side portions of the deck plate, and the vertical reinforcing member is installed between the cross beams. Only at both ends Are belt coupled, characterized in that the upper surface of the horizontal portion formed on the upper end of the cross-section vertical portion of the vertical-direction reinforcing member configured to reinforce the contact with the deck plate to a lower surface of said deck plate.
In such a basic technique, the filler is preferably composed of an elastomer material, a fluid such as water, a gel substance, or the like.

  According to this basic technique, by filling the space in the closed cross section of each vertical rib, the rigidity of the vertical rib is increased and the stress at the welded joint between the vertical rib and the deck plate is reduced. In particular, in this invention, a fluid or an incompressible deformable body is used as the filler. Therefore, such a filler has a high volume modulus of elasticity. Therefore, the stress at the welded joint between the longitudinal rib and the deck plate is reduced as compared with the conventional concrete filler.

In addition, according to the basic technology, when reinforcing an existing steel slab, a fluid or incompressible deformable body is used as the filler, so that the filler is a fluid such as water. In the case where a fluid can be injected and filled in the closed cross-section space in a short time without stopping traffic on the road, and the filling material is an incompressible deformed body made of an elastomeric material or a gel-like material. Since the solidification time is much shorter than that of concrete filling, the time for stopping traffic on the road can be greatly reduced.
Furthermore, according to such a basic technique, it is possible to perform construction simply by injecting and filling a filler consisting of either a fluid or an incompressible deformable body into the closed cross-sectional space of the longitudinal rib. In this case, as a matter of course, the existing steel slab can be reinforced with an extremely simple and small man-hour, and the maintenance and repair of the steel slab can be facilitated and maintenance is improved.

Further, according to the present invention, in the steel floor slab structure, the present invention is in contact with the lower surface of the deck plate in the vertical direction in an open space between the lower surface of the deck plate and the side portion of the vertical rib. An extending longitudinal reinforcing member is extended , and further, the longitudinal reinforcing member is installed between the transverse girders and is bolted to the transverse girders only at both ends, and an upper end of a vertical section of the longitudinal reinforcing member The deck plate is reinforced by abutting the upper surface of the horizontal portion formed on the lower surface of the deck plate .
According to this invention, in addition to increasing the local bending rigidity of the deck plate in the vertical rib closed space by filling the closed cross-section space of each vertical rib, the bottom surface of the deck plate and the vertical rib By extending the reinforcing member in the vertical direction in contact with the lower surface of the deck plate in the open space between the side portions, the local bending rigidity of the deck plate at the connecting portion between the plurality of vertical ribs is increased. The rigidity of each vertical rib itself and the connection structure of each vertical rib increases, and the effect of reducing the stress at the welded joint between the vertical rib and the deck plate increases.

(Delete)

Preferably, the longitudinal direction reinforcing member has a cross-sectional shape of a letter shape formed by connecting a horizontal portion parallel to the deck plate to an upper end of a vertical portion.
If comprised in this way, since a longitudinal direction reinforcement member is arranged so that it can contact the lower surface of the deck plate, and both ends are attached to a cross beam, the rigidity of the connection structure of the deck plate and each vertical rib increases, The stress at the welded joint between the vertical rib and the deck plate is reduced, and the vertical reinforcing member can be easily mounted just by attaching both ends to the cross beam. The rigidity of the steel deck can be improved without minimizing on-site work or performing on-site welding work.

(Delete)

And as invention of the reinforcing method of the steel slab which consists of this structure, the vertical rib extended in the vertical direction (traveling line direction) of the deck plate which comprises the floor slab of a traveling path, and was formed in the closed cross section is used for this deck. A plurality of cross beams arranged in the width direction of the plate and fixed to the bottom surface of the deck plate, and a plurality of cross beams extending in the lateral direction perpendicular to the travel line direction are formed on the bottom surface of the deck plate and the vertical rib. In the reinforcing method of a steel slab structure provided, a filling injection hole communicating with the closed cross-sectional space is drilled in the vertical rib and then filled through the filling injection hole in the closed cross-sectional space of the vertical rib. The inside of the closed cross-sectional space to be filled with a filling material that is sometimes fluid and solid after filling is filled, and in the open space between the lower surface of the deck plate and the side surface of the vertical rib, the deck plate Vertical direction in contact with the lower surface Longitudinally attached the reinforcing member by a bolt for each between the crossbeam, to reinforce the deck plate the upper surface of the horizontal portion formed on the upper end of the vertical portion of the vertical-direction reinforcing member in contact with the lower surface of the deck plate extending We propose a method for reinforcing steel slabs.
According to this invention, the filling material is filled in the closed cross-sectional space of each longitudinal rib to be filled with the filling material through the filling material injection hole drilled in the longitudinal rib. In the open space between the bottom surface of the deck plate and the side surface of the vertical rib, a longitudinal reinforcing member extending in the vertical direction in contact with the bottom surface of the deck plate is increased. A plurality of vertical ribs are attached by attaching bolts between the cross beams and reinforcing the deck plate by abutting the upper surface of the horizontal portion formed at the upper end of the vertical portion of the vertical reinforcing member against the lower surface of the deck plate. The local bending rigidity of the deck plate at the intermediate connection portion is increased, and the stress reduction effect of the welded joint portion between the vertical rib and the deck plate is further increased.

(Delete)

(Delete)

(Delete)

(Delete)

According to the present invention, the fluid or incompressible deformable body used as the filler has a high bulk modulus and resists local bending deformation of the deck plate due to vehicle load when used in a closed region. Since a force is generated, the stress at the welded joint between the longitudinal rib and the deck plate is reduced as compared with a conventional concrete filling or the like.
Further, when reinforcing an existing steel slab, a fluid or an incompressible deformable body is used as a filling material. Therefore, when the filling material is a fluid such as water, traffic on the road is stopped. Fluid can be injected and filled in a closed cross-section space in a short time without solidification, even when the filling is an incompressible deformation made of an elastomeric material or a gel-like substance, compared to conventional concrete fillings. Since the time is very short, the time for stopping the traffic on the road can be greatly reduced.
Furthermore, since it can be constructed simply by injecting and filling a filler consisting of either a fluid or an incompressible deformable body in the closed cross-sectional space of the longitudinal ribs, the existing steel floor slab is of course installed. As for the steel slab, the steel slab can be reinforced with a very simple and small man-hour, and the maintenance and repair of the steel slab are facilitated and the maintenance is improved.

According to the present invention, the vertical ribs all closed-section space of the to be filled, to fill the filler which becomes solid after filling has fluidity at the time of filling, the lower surface of the deck plate and the longitudinal ribs of the side Since a longitudinal reinforcing member that extends in the longitudinal direction in contact with the lower surface of the deck plate is extended between the longitudinal ribs, the longitudinal ribs are filled by filling all the closed cross-sectional spaces of the longitudinal ribs to be filled. The deck plate in a plurality of connecting portions between the vertical ribs is provided by increasing the longitudinal bending rigidity between the bottom surface of the deck plate and the side portions of the vertical ribs. The local bending rigidity of the plate increases, and as a result, the rigidity of each vertical rib itself and the connection structure of each vertical rib increases, and the effect of reducing the stress at the welded joint between the vertical rib and the deck plate increases.
The vertical reinforcing member is disposed so that the upper surface can contact the lower surface of the deck plate, and is disposed between adjacent vertical ribs so as to extend in the same direction as the vertical ribs. with attached configuration, since attaching the opposite end portions and disposed to be abutted against the reinforcing member to the lower surface of the deck plate to crossbeam, with the stress reduction effect of the same weld joint, both end portions Because it is possible to easily attach the reinforcing member simply by attaching to the cross girder, it is possible to improve the rigidity of the steel slab by minimizing the field work such as welding on existing bridges and roads.

(Delete)

(Delete)

(Delete)

(Delete)

  Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the component parts described in this example are not intended to limit the scope of the present invention only to specific examples unless otherwise specified. Only.

FIG. 1 is a partial front view (viewed in a traveling route direction) of the vicinity of a welded joint between a deck plate and a longitudinal rib in a steel deck according to a first comparative example of the present invention. 2 is a diagram corresponding to FIG. 1 showing a second comparative example, and FIG. 3 is a diagram corresponding to FIG. 1 showing a third comparative example . 4A and 4B show a fourth comparative example, in which FIG. 4A is a view corresponding to FIG. 1, FIG. 4B is a cross-sectional view taken along line AA in FIG.
5A and 5B show a fifth comparative example, in which FIG. 5A is a diagram corresponding to FIG. 1 and FIG. 5B is a structural diagram of a steel deck in the road width direction. FIG. 6 is a perspective view of a steel deck structure part of a bridge to which the present invention is applied. FIG. 7 shows a sixth comparative example , (A) is a view corresponding to FIG. 1 showing a state after filling, and (B) is a view corresponding to FIG. 1 showing a filling state. FIG. 8 shows the injection procedure of the filler into the vertical ribs in the sixth comparative example, (A) is a view corresponding to FIG. 1 showing the state after the filler is filled into the lower layer, and (B) is in (A). It is CC sectional view taken on the line.
FIG. 9 is a block diagram corresponding to FIG. 1 showing the first embodiment . FIG. 10 is a view taken in the direction of arrow E in FIG. 9 in the first embodiment . FIG. 11 is a DD arrow view of FIG. 9 in the first embodiment . Figure 12 is a diagram 1 corresponding view showing a second embodiment. FIG. 13 is a front view of an essential part of the reinforcing member showing the third embodiment .

In FIG. 6 showing a steel floor slab structure portion of a bridge to which the present invention is applied, 100 is a steel floor slab, 1 is a deck plate constituting the floor slab of the steel floor slab 100, 4 is a traveling path side of the deck plate 1 It is the upper surface. Reference numeral 35 denotes a cross beam fixed to the lower surface of the deck plate 1 and provided in plural along the traveling line direction. Reference numeral 2 denotes a longitudinal rib extending in the longitudinal direction (traveling line direction) of the deck plate 1, a plurality of which are arranged in the width direction of the deck plate 1 and fixed to the lower surface of the deck plate 1 by welding. 2a is a welded joint. Reference numeral 3 denotes a bridge girder suspended from the lower surface of the deck plate 1.
The present invention relates to a reinforcing structure and a reinforcing method for the deck plate 1 and the vertical rib 2 in the steel deck 100.
(Comparative Example 1)

In FIG. 1 showing the first comparative example, 1 is a deck plate, 2 is a plurality of vertical ribs fixed to the lower surface of the deck plate 1 by welding (2a is a welded joint), and is a closed cross section having a substantially U-shaped cross section. And both upper ends are welded to the deck plate 1.
The inside of each vertical rib 2, that is, the closed cross-sectional space, is filled with a filler 10 made of a fluid or an incompressible deformable body. The filling 10 is made of a fluid such as water, or an incompressible deformable body such as an elastomer material or a gel-like substance, and each is provided on the vertical rib 2 when the vertical rib 2 is injected into the closed cross-sectional space. It is made of a material that can be injected through an injection hole (not shown). 3 is a bridge girder.

  In the steel deck 100 having such a configuration, the vehicle load by the vehicle traveling on the traveling path provided above the traveling side upper surface 4 (see FIG. 6) of the deck plate 1 is the deck plate 1 and the plurality of vertical ribs. 2 is loaded with a local bending load, and stress (tensile stress or compressive stress) accompanied by stress concentration due to the bending load is generated at the welded joint portion 2a of each vertical rib 2 and the deck plate 1.

However, according to the comparative example, since the filler 10 is filled in the closed cross-sectional space of each vertical rib 2, the local bending rigidity of the deck plate in the closed space of each vertical rib 2 is increased by the filler 10. The stress concentration in the welded joint portion 2a between the vertical rib 2 and the deck plate 1 is alleviated .
In particular, in this comparative example, an elastomer material which is an incompressible deformable body is used as the filler 10, so that the filler 10 has a high volume elastic modulus and is closed as in the closed cross-sectional space. When used in a region, a resistance force is generated against local bending deformation of the deck plate 1 due to vehicle load. Thereby, by using the elastomer material which is an incompressible deformation body as the filler 10, the stress in the welded joint portion 2a between the longitudinal rib 2 and the deck plate 1 is reduced as compared with the conventional concrete filler or the like. The

Further, according to this comparative example, when reinforcing the existing steel deck 100, a fluid such as water or an incompressible deformed body such as an elastomer material or a gel-like substance is used as the filler 10. When the filling 10 is a fluid such as water, the fluid can be injected and filled in the closed cross-sectional space of each of the vertical ribs 2 in a short time without stopping the traffic on the traveling path.
Also, when the filler 10 is an incompressible deformation body such as an elastomer material or a gel-like substance, the solidification time can be extremely short as compared with the conventional concrete filler, so that the time for stopping traffic on the traveling road can be reduced. Can be greatly shortened.

Further, according to the comparative example, the filling 10 made of a fluid such as water or an incompressible deformation body such as an elastomer material or a gel substance is only injected and filled in the closed cross-sectional space of the vertical rib 2. Since the steel plate slab 100 can be reinforced, the steel plate slab 100 can be reinforced with an extremely simple and small man-hour for the existing steel plate slab 100 as well as the existing steel plate slab 100.
(Comparative Example 2)

In the second comparative example shown in FIG. 2, the filler 10 is filled in the open space between the lower surface of the deck plate 1 and the plurality of vertical ribs 2, and the filler 10 is filled. The open space is covered fluidly with a cover member 11, and the cover member 11 is fastened to the vertical rib 2 with a plurality of bolts 12. In the figure, 3 is a bridge girder.
The filler 10 is preferably a fluid such as water as described in the first comparative example, or an incompressible deformable body such as an elastomeric material or a gel substance, but a fluid containing liquid, concrete, or the like. It may be a solid having fluidity at the time of filling.
According to this comparative example, the filling material 10 is filled between the plurality of vertical ribs 2, and the open space is fluid-tightly covered with the cover member 11, whereby the plurality of vertical ribs 2 are filled with the filling material 10. The local bending rigidity of the deck plate at the intermediate connection portion is increased, and the stress of the welded joint portion 2a between the vertical rib 2 and the deck plate 1 is reduced.
(Comparative Example 3)

In the third comparative example shown in FIG. 3, the filler 10 is filled in the closed sectional space of each vertical rib 2 and in the open space between the lower surface of the deck plate 1 and the plurality of vertical ribs 2. Yes. As in the second comparative example , the open space filled with the filler 10 covers the open space filled with the filler 10 fluid-tightly with a cover member 11, and covers the cover member 11 with a plurality of covers. Fastened to the vertical rib 2 with bolts 12. In the figure, 3 is a bridge girder and 5 is a wheel of a traveling vehicle.
The filler 10 is preferably a fluid such as water or an incompressible deformable body such as an elastomeric material or a gel-like substance as in the first embodiment, but when filling a fluid containing liquid or concrete or the like. It may be a solid having fluidity (a solid containing a fluid or at least an incompressible deformable material having fluidity when filled).
According to this embodiment, by filling the vertical rib 2 with the filler 10 in the closed cross-sectional space of each vertical rib 2, the local bending rigidity of the deck plate in the closed space of the vertical rib 2 itself is increased. By filling the open spaces between the plurality of vertical ribs 2 with the filler 10 and fluidly covering the open spaces with the cover member 11, the local portions of the deck plates at the connecting portions between the plurality of vertical ribs 2 are covered. The bending rigidity is increased, and the stress reduction effect of the welded joint portion 2a between the vertical rib 2 and the deck plate 1 is further increased.
(Comparative Example 4)

In the fourth comparative example shown in FIGS. 4 (A), 4 (B), and 4 (C), the filler 10 is filled in the closed cross-sectional space of each vertical rib 2 and the bottom surface of the deck plate 1 and each vertical rib. A reinforcing plate 14 in the vertical direction (traveling line direction) and a reinforcing plate 13 in the horizontal direction (traveling path width direction) are installed between the side portions of the ribs 2.
The filler 10 is preferably a fluid such as water or an incompressible deformable body such as an elastomeric material or a gel-like substance as in the first embodiment, but when filling a fluid containing liquid or concrete or the like. It may be a solid having fluidity. In the figure, 3 is a bridge girder.
According to such an embodiment, filling the filler 10 in the closed cross-sectional space of each vertical rib 12 increases the local bending rigidity of the deck plate in the closed space of the vertical rib 2, and the bottom surface of the deck plate 1. Since the reinforcing plates 14 or 13 in two directions perpendicular to the side of each vertical rib 2 are installed, the local bending rigidity of the deck plate at the connecting portion between the plurality of vertical ribs 2 is increased. The rigidity of the rib 2 itself and the connecting structure of the vertical ribs 2 is increased, and the effect of reducing the stress of the welded joint portion 2a between the vertical rib 2 and the deck plate 1 is increased.

In the third and fourth comparative examples , when the filler 10 is filled in the closed cross-sectional space of each vertical rib 2, a filler injection hole (not shown) communicating with the closed cross-sectional space is formed in the vertical rib 2. After the drilling, the filler 10 in a fluid state is injected and filled into the closed cross-sectional space through the filler injection hole.
Further, when filling the filling material 10 in the open space between the lower surface of the deck plate 1 and the plurality of vertical ribs 2, the cover member 11 is provided with a filling material injection hole (not shown). 11, after covering the open space, the filler 10 in a fluid state is injected and filled into the open space through the filler injection hole.
(Comparative Example 5)

In the fifth comparative example shown in FIGS. 5 (A) and 5 (B), it is located below and in the vicinity of the action part of the vehicle load applied through the wheels of the vehicle traveling on the traveling path above the deck plate 1. The filler 10 is filled only in the closed cross-sectional space of each vertical rib 2 and in the open space between the lower surface of the deck plate 1 and the plurality of vertical ribs 2.
When filling the filler 10, for the closed cross-sectional space of each vertical rib 2, a filling injection hole (not shown) communicating with the closed cross-sectional space is drilled in the vertical rib 2, and then the filling is performed. The filler 10 in a fluid state is injected and filled into the closed cross-sectional space through the object injection hole.
In addition, with respect to the open space, a filling material injection hole (not shown) is provided in the cover member 11 so that the open space is covered by the cover member 11 and then flows into the open space through the filling material injection hole. A filling 10 is injected and filled.
The filler 10 is preferably a fluid such as water or an incompressible deformable body such as an elastomeric material or a gel-like substance as in the first embodiment, but when filling a fluid containing liquid or concrete or the like. It may be a solid having fluidity.

According to such a comparative example , in the closed cross-section space of the vertical rib 2 positioned below and in the vicinity of the vehicle load acting site where the vehicle load is locally applied, and the bottom surface of the deck plate 1 and a plurality of vertical Only in the open space between the ribs 2, the filler 10 in a fluid state is filled through the filler injection hole to increase the local bending rigidity of the deck plate in the closed space. Since the reinforcement by filling with the filler 10 is omitted in the light load portion of the deck plate 1, the number of reinforcement work steps by filling the filler 10 can be reduced with the minimum man-hour and the minimum material cost. And the required stress reduction effect in the welded joint portion 2a between the vertical ribs 2 can be obtained.
(Comparative Example 6)

In the sixth comparative example shown in FIGS. 7 (A), 7 (B) and 8 (A), 8 (B), the closed ribs of the vertical ribs 2 and the bottom surface of the deck plate 1 and the plurality of the plurality of ribs are used. Either one or both of the open spaces between the vertical ribs 2 is filled with a low-cost first filler 20 on the lower layer side away from the deck plate 1 with a low solidification rate of concrete or the like. A second filler 21 made of a material having a higher solidification speed than the first filler 20 such as an elastomer material is filled on the upper layer side near the plate 1. Other configurations are the same as those of the second and third comparative examples , and the same members are denoted by the same reference numerals.

In filling the first and second fillings 20 and 21, as shown in FIGS. 7B, 8A, and 8B, the inside of the vertical cross section 2 of the vertical rib 2 and the deck are provided. A filler injection device 23 communicating with the upper space in the open space between the lower surface of the plate 1 and the plurality of vertical ribs 2 is attached to the bottom of the vertical rib 2 and the cover member 11 in the open space.
And as shown to FIG. 8 (A), (B), even if the solidification speed | rate of concrete etc. is small at the lower layer side of the said closed cross-section space and the said open space first (even if curing time is long), it is low-cost 1st. 1 filling 20 is injected and filled. At this time, the injection amount of the first filler 20 is such that a gap 25 exists between the upper layer side of the first filler 20, that is, between the first filler 20 and the lower surface of the deck plate 1. Adjust. The air in the gap portion 25 is discharged from an appropriate position in the longitudinal direction of the vertical rib 2.
Next, a second filler 21 made of a material having a higher solidification rate than the first filler 20 such as an elastomer material is injected into the gap portion 25 formed on the upper layer side near the deck plate 1, Fill.

According to such a comparative example, when the first filler 20 having a low solidification rate such as concrete is filled in the closed section space or the lower layer side of the open space, the upper layer side of the first filler 20, that is, the first filler 20. Since a gap 25 is formed between the one filler 20 and the lower surface of the deck plate 1, no cracks are generated on the first filler 20 side even when a wheel load is applied due to the passage of the vehicle. Therefore, it is not necessary to stop the traffic on the road.
Further, since the second filler 21 filling the upper gap portion 25 of the first filler 20 has a higher solidification rate than the first filler 20, the second filler 21 solidifies quickly. Even when the filling material 21 is filled, the time during which traffic stoppage is unnecessary can be greatly shortened.
Therefore, according to the embodiment, it is possible to reinforce the steel slab 100 by greatly reducing the time without requiring any traffic stop on the traveling road, and to increase its strength.
(Example 1)

In the first embodiment shown in FIGS. 9 to 11, the vertical rib 2 of the comparative example 1 shown in FIG. A longitudinal reinforcing member 30 is provided.
That is, in FIGS. 9 to 11, reference numeral 30 denotes a longitudinal reinforcing member, which includes a vertical portion 30a, a horizontal portion 30b connected to the upper end of the vertical portion 30a, and a reinforcing portion 30c connected to the lower end of the vertical portion 30a. It is formed by. The upper surface of the horizontal portion 30b is bonded to the lower surface of the deck plate 1 with an adhesive 33 (only by bringing the upper surface of the horizontal portion 30b into contact with the lower surface of the deck plate 1 without using the adhesive 33). Good).
As shown in FIG. 11, a plurality of the vertical reinforcing members 30 are provided between the horizontal beams 35, and the horizontal reinforcing members 30 are interposed via L-shaped attachment members 31 fixed at both ends by bolts 32. The girders 35 are fixed to both surfaces by bolts 32.
Further, the vertical reinforcing member 30 is formed by integrating the vertical portion 30a and the reinforcing portion 30c into a JI.
S G3192 spherical flat steel can also be used.
(Example 2)

In the second embodiment shown in FIG. 12, the longitudinal reinforcing member 30 is made of a steel material having a U-shaped cross section, that is, a so-called channel steel material. In this case, the standard product can be used as it is, and the longitudinal reinforcing member 30 can be integrally formed without welding, so that the manufacturing cost of the longitudinal reinforcing member 30 is reduced.
(Example 3)

Further, in the third embodiment shown in FIG. 13, the longitudinal reinforcing member 30 has a cross-sectional shape of a letter shape formed by connecting a horizontal portion 30b parallel to the deck plate 1 to the upper end of the vertical portion 30a. I have it.

According to the first to third embodiments , the longitudinal reinforcing member 30 is disposed so as to be in contact with the lower surface of the deck plate 1, and both end portions thereof are arranged on the cross beam 35 via L-shaped attachment members 31. As a result, the rigidity of the connecting structure between the deck plate 1 and each vertical rib 2 is increased, the stress at the welded joint between the vertical rib 2 and the deck plate 1 is reduced, and both end portions of the vertical reinforcing member 30 are attached. Since the longitudinal reinforcing member 30 can be easily mounted simply by attaching it to the cross girder 35, field work such as welding is minimized even on existing bridges and roads, or on-site welding work only by bolting. It is possible to improve the rigidity of the steel deck slab without performing.

  According to the present invention, it is possible to simplify the filling and filling operations of the filling material into the closed cross-sectional space of the vertical ribs, reduce the filling material filling and filling work man-hours, and maintainability is improved. It is possible to reinforce the steel slab without stopping the traffic on the roadway or with a short traffic stop, and the rigidity in both the vertical rib and the open space between the bottom surface of the deck plate and the vertical rib It is possible to provide a steel slab whose strength is increased and a method for reinforcing the steel slab.

It is a partial front view (figure looked at the travel route direction) of the welded joint vicinity of the deck plate and vertical rib in the steel deck according to the first comparative example of the present invention. It is a figure corresponding to FIG. 1 which shows a 2nd comparative example. It is a figure corresponding to FIG. 1 which shows a 3rd comparative example . A 4th comparative example is shown, (A) is a figure corresponding to Drawing 1, (B) is an AA line sectional view in (A), and (C) is a BB line sectional view in A. The 5th comparative example is shown, (A) is a figure corresponding to Drawing 1, and (B) is a structure figure of the road width direction of a steel deck. It is a perspective view of the steel floor slab structure part of the bridge with which this invention is applied. FIG. 6 shows a sixth comparative example , (A) is a view corresponding to FIG. 1 showing a state after filling, and (B) is a view corresponding to FIG. (A) is a diagram corresponding to FIG. 1 and shows a state after filling the lower layer with the filler in the sixth comparative example , and (B) is a CC line in (A). It is line sectional drawing. It is a figure corresponding to FIG. 1 which shows 1st Example . FIG. 10 is a view on arrow E of FIG. 9 in the first embodiment . FIG. 10 is a DD arrow view of FIG. 9 in the first embodiment . It is a figure corresponding to FIG. 1 which shows 2nd Example . It is a principal part front view of the reinforcement member which shows 3rd Example .

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Steel deck 1 Deck plate 2 Vertical rib 2a Welded joint 3 Bridge girder 4 Running road side upper surface 10 Filling 11 Cover member 12 Bolts 13 and 14 Reinforcement plate 20 First packing 21 Second packing 23 Filling injection device 30 Longitudinal reinforcement member

Claims (3)

A plurality of vertical ribs extending in the vertical direction (traveling line direction) of the deck plate constituting the floor slab of the traveling path and formed in a closed cross section are arranged in the width direction of the deck plate on the lower surface of the deck plate. secured to a Rutotomoni, the deck plate and the vertical ribs underside, in steel deck structure comprising a plurality of crossbeams extending transversely perpendicular to the traveling line direction,
The entire closed rib space of the vertical ribs to be filled is filled with a filling material that has fluidity during filling and becomes solid after filling, and is open between the bottom surface of the deck plate and the side portions of the vertical ribs. A vertical reinforcing member extending in the vertical direction in contact with the lower surface of the deck plate is extended in the space, and further, the vertical reinforcing member is installed between the horizontal beams and only the both ends are connected to the horizontal beams. A steel floor slab that is configured to reinforce a deck plate by abutting an upper surface of a horizontal portion that is bolted and formed at an upper end of a vertical section of the longitudinal reinforcing member to a lower surface of the deck plate. Construction. The steel floor slab structure according to claim 1, wherein the longitudinal reinforcing member has a cross-sectional shape in a letter shape formed by connecting the horizontal portion parallel to the deck plate to an upper end of a vertical portion. . A plurality of vertical ribs extending in the vertical direction (traveling line direction) of the deck plate constituting the floor slab of the traveling path and formed in a closed cross section are arranged in the width direction of the deck plate on the lower surface of the deck plate. In the reinforcing method of the steel floor slab structure comprising a plurality of cross girders extending in a transverse direction perpendicular to the traveling line direction on the deck plate and the longitudinal rib lower surface,
In the closed cross-sectional space of the vertical rib, a filling material injection hole communicating with the closed cross-sectional space is drilled in the vertical rib, and then fluidity is provided during filling through the filling material injection hole, and becomes solid after filling. A vertical direction that fills all of the closed cross-sectional space to be filled with a filling material and extends vertically in contact with the lower surface of the deck plate in an open space between the lower surface of the deck plate and the side surface of the vertical rib. A reinforcing member is attached by bolts between the horizontal beams, and the upper surface of the horizontal portion formed at the upper end of the vertical portion of the vertical reinforcing member is in contact with the lower surface of the deck plate to reinforce the deck plate. How to reinforce the steel deck.

Images