JP3504812B2 - Pedestrian bridge - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a humanitarian bridge which is temporarily used as a temporary sidewalk when a bridge or the like is erected, and more particularly to a technique for facilitating passage by constructing a low floor level.

[0002]

2. Description of the Related Art For example, when an old bridge is demolished and a new bridge is bridged, a temporary bridge is installed as a passage during the construction period. Such temporary bridges are
Although it is desirable that people, bicycles, and all other means of transportation can pass through, it is often the case that the above temporary bridge cannot be installed due to the installation space and construction costs. In such a case, by installing a humanitarian bridge that allows only light vehicles such as people and bicycles to pass, the vehicles will bypass other adjacent bridges and people and bicycles will reach the adjacent bridges. It is hard to detour, so I try to use this humanitarian bridge.

6 to 8 are explanatory views showing the structure of a conventional humanitarian bridge. FIG. 6 is a side view, FIG. 7 is a plan view, and FIG.
Indicate cross-sectional views, respectively. As shown in the figure, in this humanitarian bridge, two main girders 101 made of H-shaped steel are arranged substantially parallel to each other so as to cross the revetment on both banks of the river, and the upper flange of the main girder 101 is arranged. A guide member 102 having a U-shaped cross section is fixed on the surface by welding along the longitudinal direction of the main girder. Further, a plurality of lining plates 103 are laid on the flange surface while being guided by the guide member 102.
3 becomes the floor so that people and light vehicles can pass through.

The upper surface of the guide member 102 has a height of 11
A handrail 104 having a size of about 00 [mm] is erected, and a wire net 105 is stretched over the handrail 104 to prevent a person from falling or an article from falling. Further, as shown in FIG. 8, a plurality of buckling prevention members 106 are provided so as to pass between the two main girders 101.
The buckling prevention material 106 is installed in the main girder 101.
It is fastened and fixed to the rib 107 attached to the web surface of the above with bolts and nuts. This buckling prevention material is composed of a channel material, which prevents bending buckling of the entire bridge. That is, the main girder 101 is configured to be long to some extent, and when a person or a light vehicle passes by, bending buckling occurs due to this load. Generally, in order to prevent this bending buckling, a method of arranging a bridge pier in the middle part of the bridge is conceivable. Therefore, the buckling prevention material is arranged in several places to prevent bending buckling.

[0005]

However, in the above-mentioned conventional humanitarian bridge, since the lining plate 103 is placed on the upper flange of the main girder 101, for example, the height of the main girder 101 is 600 [mm]. If the thickness of the lining plate 103 is 100 [mm], the whole becomes 700 [mm], and if the lower flange surface of the main girder 101 is the ground (ground level), it will be a person or a light vehicle. The surface of the lining plate 103 through which the
It will be as high as 00 [mm]. If only people can pass here, the height of 700 [mm] can be supplemented by providing several steps at the end of the humanitarian bridge, but for light vehicles such as bicycles and strollers, stairs can be used. Since it is not possible to move up and down, a slope must be installed to compensate for this height. In order to install a slope to compensate for the height of 700 [mm], considering the slope angle of the slope, a length of at least several meters is required, so if you try to install it forcibly, it will obstruct road traffic. And it is necessary to make the slope of the slope extremely steep, which is a safety issue.

The present invention has been made in order to solve such a conventional problem, and an object thereof is to place a surface of a lining plate through which a person or a light vehicle passes at a position not so high from the ground. The purpose is to provide a humanitarian bridge that can be installed.

[0007]

Means for Solving the Problems To achieve the above object, the present invention provides a humanitarian bridge which is temporarily erected so as to pass between revetments on both sides of a river so that people and light vehicles can pass through it. Two main girders that are laid so as to span the revetment and that are arranged substantially parallel to each other, and are configured to be longer than the distance between the two main girders, and on the lower surface of the lower flange of the two main girders. A plurality of transverse girder members abutting and arranged orthogonally to each other, a connecting plate fixed to the upper side surface of the lower flange of each main girder and protruding inward, and an end portion placed on the protruding portion of the connecting plate. A plurality of lining plates that are laid between two main girders, and a plurality of diagonal members that are diagonally arranged between the ends of the cross girder material and the upper end of the main girder to reinforce, And a handrail which is erected on each connecting plate. Further, a lining material for fixing the lining plate is arranged inside each of the handrails.

According to the present invention constructed as described above, the cross girder member for receiving the bending buckling of the humanitarian bridge is arranged on the lower surface side of the main girder, and the diagonal member fixed to the cross girder member is used. The cross girder material and the main girder are connected. Therefore, the lining plate can be arranged inside the main girder, and the lining plate can be arranged at a lower position than the conventional one. As a result, there is almost no difference in height between the upper surface of the lining plate and the ground level, and it becomes possible to easily pass a light vehicle without using a steep slope. Also, by fixing the lining material, lifting of the lining plate is prevented, so even if a strong wind is blown from the lower side of the lining plate, the lining plate does not lift and high safety is ensured. Can be secured.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 are explanatory views showing the configuration of a humanitarian bridge according to the present invention, FIG. 1 is a plan view, FIG. 2 is a side view, and FIG. 3 is a sectional view. As shown in Fig. 2, this humanitarian bridge has bed girders 1 (1a, 1b) laid along the revetments on both sides of the river, and two bed girders 1a and 1b are provided so as to pass between them. The main girder 2 is installed. For the floor girder 1, for example, an H-shaped steel material having a flange surface of 300 [mm] is used, and in order to bury the floor girder 1 in the ground of a seawall,
The seawall has been excavated along the river edge for about 300 [mm],
The floor girder 1 is laid on the dug-down portion. Therefore, the upper flange surface of the bed beam 1 substantially coincides with the ground level (GL).

The interval between the main girders 2 is 2000 to 2500 [m
It is said to be about m], so that people and light vehicles passing on the bridge deck facing each other can easily pass each other. FIG. 4 is a partial detailed view of the cross-sectional view shown in FIG. 3. As shown in FIG. 4, the plate 3 is fastened and fixed with bolts and nuts on the lower flange surface 2a of the H-shaped steel material that constitutes the main girder 2. Has been done,
A fixed frame 4 is fixed on the plate 3, and a handrail 5 is attached on the upper side thereof. Then, a plurality of lining plates 6 serving as a bridge floor are laid on the plate 3 inside the handrail 5 (see FIG. 1).

An angle member 7 is fixed to the lower side of the handrail 5 by welding as shown in FIG.
A long covering material 8 having a C-shaped cross section is fastened and fixed by bolts and nuts. Then, the lower surface of the ground covering material 8 is just in contact with the upper surface of the lining plate 6. Therefore,
The upper side of the lining plate 6 is fixed by the ground covering material 8 so that the lining plate 6 is prevented from being lifted by the wind load blown from the lower side of the lining plate 6.

At the end of the main girder 2, a bed girder 1 (1a, 1b),
Transverse girders 12 (12a, 12b) are provided in the middle part of the main girders 2, respectively.
Are arranged at right angles to the lower flange surface, and the cross beam 1 and the cross beam 12 constitute the cross beam member described in the claims. Further, the bed girder 1 and the cross girder 12 are configured to be longer than the interval between the two main girders 2, and there is a fixed distance between the outer side surface of the main girder 2 and the end of the bed girder 1 or the girder 12. There is a margin of distance L.

Floor girder 1 (1a, 1b) and cross girder 12 (12
Ribs 9 (see FIG. 4) are fixed by welding to the ends of (a, 12b), respectively.
The reinforcing plate 10 is also fixed to the side portion of the shaped steel material by welding, and the rib 9 and the upper side of the reinforcing plate 10 are connected by a diagonal member 11 having an L-shaped cross section, and fastened and fixed by bolts and nuts. ing.

FIG. 5 is an explanatory view showing the detailed construction of the handrail 5, and as shown in the figure, a cross member 5 made of a square pipe.
a, a vertical member 5b, and horizontal members 5c, 5d made of an angle member are welded or connected by bolts and nuts, and a fixing frame 4 is arranged at the lower end of the vertical member 5b.
The handrail has a height of about 1100 [mm] to prevent a person from falling or an object from falling.

Next, the operation of this embodiment configured as described above will be described. In the pedestrian bridge of the present embodiment, a cross girder member composed of a bed girder 1 and a girder 12 is arranged below the main girder 2 to support a load, and an end portion of the girder member and an upper part of the main girder 2 are formed. By disposing the diagonal member 11 in between, it becomes possible to prevent bending buckling of the entire bridge. Therefore,
It is possible to construct a humanitarian bridge without installing bridge piers in the middle of the bridge and without raising the bridge floor to the ground.

In this way, in this embodiment, the main girder 2
The floor girder 1 and the horizontal girder 12 are arranged on the lower side of the floor girder, and the bed girder 1 is embedded in the ground of the revetment so that the upper surface side of the bed girder 1 is almost the same as the ground (ground level). By connecting the main girder 2 with the diagonal member 11 locked to the girder 12, bending buckling which acts on the humanitarian bridge is prevented. Therefore, the problem that the bridge floor is significantly higher than the ground as in the past is solved, and the height difference with the ground is about the thickness of the lining plate 6 (about 100 [mm]). Can be easily straddled, and by arranging a slope, a light vehicle such as a bicycle or a stroller can easily pass.

By attaching the ground covering 8 to the inside of the handrail 5, the lining plate 6 can be fixed from the upper side, and even if strong wind is blown from the lower side of the lining plate 6, the lining plate 6 can be fixed. 6
It will be possible to solve problems such as being lifted.

[0018]

As described above, according to the present invention,
Since the cross girders (laying girder 1 and girder 12) are arranged below the main girder and the end part side of this girder and the side of the main girder are locked with diagonal members, Bending buckling acting on the bridge can be prevented, and the height difference between the bridge floor and the ground can be reduced as in the conventional case. This eliminates the need to place stairs or steep slopes at the end of the humanitarian bridge,
Passing is easy and safe. In addition, by disposing the ground covering, it is safe because the lining plate that serves as the bridge floor is not lifted up.

[Brief description of drawings]

FIG. 1 is a plan view of a humanitarian bridge according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view (front view) taken along the line AA of the humanitarian bridge shown in FIG.

FIG. 3 is a cross-sectional view (side view) taken along the line BB of the humanitarian bridge shown in FIG.

FIG. 4 is an explanatory diagram showing a detailed configuration of an end portion of the humanitarian bridge according to the present embodiment.

FIG. 5 is an explanatory view showing details of a handrail part of the humanitarian bridge according to the present embodiment.

FIG. 6 is a plan view of a conventional humanitarian bridge.

FIG. 7 is a front view of a conventional humanitarian bridge.

FIG. 8 is a side view of a conventional humanitarian bridge.

[Explanation of symbols]

1 (1a, 1b) Floor girder (transverse material) 2 main girders 3 plates 4 fixed frame 5 handrail 6 lining board 7 Angle material 8 lining material 9 ribs 10 Reinforcement plate 11 diagonal materials 12 (12a, 12b) Cross beam (cross beam material)

─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-9-302616 (JP, A) JP-A-7-292618 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) E01D 15/12-15/133

Claims (2)

(57) [Claims] 1. A humanitarian bridge that is temporarily erected so as to pass between revetments on both sides of a river so that people and light vehicles can pass through them. Arranged substantially parallel to each other so as to extend between revetments. Two main girders, and a plurality of transverse girder members that are configured to be longer than the distance between the two main girders and that are arranged orthogonal to each other by contacting the lower side surfaces of the lower flanges of the two main girders, A connecting plate that is fixed to the upper side surface of the lower flange of each main girder and projects inward, and a plurality of covers that are placed between the two main girders and have their ends placed on the projecting parts of the connecting plates. A work plate, a plurality of diagonal members arranged diagonally between the transverse girder material end portion and the upper end portion side of the main girder to reinforce, and a handrail standing upright on each of the connection plates, A humanitarian bridge characterized by having. 2. The pedestrian bridge according to claim 1, wherein a ground covering material for fixing the lining plate is arranged inside each of the handrails.