JP6763820B2 - Shielding structure for stretchable gaps in wall balustrades - Google Patents

Description

The present invention relates to a structure for shielding a stretchable gap in a wall balustrade, and more particularly to a structure for shielding a stretchable gap in a wall balustrade, which has excellent impact resistance. In the following, the shielding structure of the expansion / contraction gap in the wall balustrade may be simply referred to as "shielding structure of the expansion / contraction gap" or "shielding structure".

The wall railings of bridges such as road bridges play an important role as facilities for preventing vehicles from deviating from the road.

On the other hand, the wall balustrade is provided with an expansion / contraction gap in order to cope with expansion / contraction due to temperature changes.

The length of this telescopic gap in the bridge axis direction varies from less than 100 mm to 1000 mm or more depending on the scale of the bridge, but this telescopic gap also secures functions such as prevention of vehicle deviation from the road, and people and objects fall. It is necessary to take measures to prevent this from happening. As a measure for this purpose, a plate-shaped body is often arranged so as to close the expansion / contraction gap from the traveling path side (see, for example, Non-Patent Document 1).

FIG. 10 shows a shielding structure 200 (hereinafter, simply referred to as “shielding structure 200”) which is an example of a shielding structure of the expansion / contraction gap of the wall balustrade, which is formed by arranging a plate-like body so as to close the expansion / contraction gap of the wall balustrade from the traveling path side. It is a perspective view schematically showing), and FIG. 11 is a side view of the shielding structure 200 shown in FIG. 10 as viewed from the traveling path side.

As shown in FIGS. 10 and 11, in the shielding structure 200, the plate-shaped body 202 is arranged on the traveling path side so as to close the expansion / contraction gap 302 of the wall railing column 300, and the bridge shaft of the plate-shaped body 202. Only one end 202A in the direction is fixed to the wall rail 300. Since only one end 202A in the bridge axis direction of the plate-shaped body 202 is fixed to the wall balustrade 300, the plate-shaped body 202 can follow the expansion and contraction of the wall balustrade 300.

The wall balustrade 300 is made of concrete, and one end 202A of the plate-shaped body 202 in the bridge axis direction is attached to the wall balustrade 300 by a concrete anchor 204. Specifically, as the plate-shaped body 202, for example, a zinc hot-dip galvanized steel plate, a stainless steel plate, or the like can be used.

On the other hand, as mentioned above, the wall balustrade of a bridge such as a road bridge plays an important role as a facility for preventing the vehicle from deviating from the road, and the function of the wall balustrade is impaired even in the event of an accident such as a vehicle collision. From this point of view, it is preferable that the impact resistance of the structure provided in the expansion / contraction gap of the wall railing is sufficiently improved.

As a shielding structure for expanding and contracting gaps having improved impact resistance as compared with the shielding structure for expanding and contracting gaps 200 using the plate-shaped body 202 (see FIGS. 10 and 11), there is a shielding structure described in Non-Patent Document 2. .. FIG. 12 is a view in which the side view (side view seen from the direction perpendicular to the bridge axis) shown in FIG. 3-13 of Non-Patent Document 2 is coded. In the shielding structure 220 shown in FIG. 12, one of the two vertically long box-shaped steel members 222 and 224, the box-shaped steel member 222, is fitted into the other box-shaped steel member 224, which is one size larger in shape. It is a structure that has been made to. Further, the box-shaped steel members 222 and 224 are attached to the wall balustrade 320 by anchor bolts 226.

"Guide for Designing Steel Bridge Telescopic Devices", Japan Bridge Association, September 2009, p.32 "Guide for Designing Steel Bridge Telescopic Devices", Japan Bridge Association, September 2009, p.33

However, from the viewpoint of preventing the function of preventing deviation from the road from being impaired even in the event of an accident such as a vehicle collision, it is desired to further improve the impact resistance of the shielding structure provided in the expansion / contraction gap of the wall balustrade. ..

The present invention has been made in view of such a point, and an object of the present invention is to provide a shielding structure for expansion and contraction gaps in a wall balustrade with improved impact resistance.

The present invention solves the above-mentioned problems by the following structure for shielding the expansion / contraction gap of the wall balustrade.

That is, the first aspect of the expansion / contraction gap shielding structure of the wall balustrade according to the present invention is the expansion / contraction gap shielding structure of the wall balustrade provided in the expansion / contraction gap between the wall balustrades adjacent to each other in the bridge axis direction. It has a first hollow member and a second hollow member, and the first hollow member is attached to one of the facing surfaces of the wall balustrades adjacent to each other in the bridge axis direction. The second hollow member is attached to the other surface of the opposing surfaces of the wall balustrades adjacent to each other in the bridge axis direction, and the outer shape of the first hollow member is the second hollow. The second hollow member is smaller than the space formed on the inner surface of the member, and the portion of the second hollow member opposite to the side to be attached to the wall balustrade is open, and the first hollow member is The first hollow member is fitted to the second hollow member, and the first hollow member is a structure for shielding an expansion / contraction gap of a wall balustrade, characterized in that the hollow portion is filled with a filler.

Here, in the present application, the "shielding structure of the expansion / contraction gap of the wall balustrade" is a concept including not only the case where the expansion / contraction gap is completely closed but also the case where at least a part of the expansion / contraction gap is closed.

Further, in the present application, the "hollow member" means a member initially provided with a hollow portion, and even if the hollow portion is later filled with a filler, it is referred to as a hollow member.

As the filler, for example, concrete or non-shrink mortar may be used.

The second aspect of the expansion / contraction gap shielding structure of the wall balustrade according to the present invention is the shielding structure of the expansion / contraction gap of the wall balustrade provided in the expansion / contraction gap between the wall balustrades adjacent to each other in the bridge axis direction. The first hollow member is attached to one of the facing surfaces of the wall railings adjacent to each other in the bridge axis direction. The second hollow member is attached to the other surface of the opposing surfaces of the wall railings adjacent to each other in the bridge axis direction, and the outer shape of the first hollow member is the outer shape of the second hollow member. The second hollow member is smaller than the space formed on the inner surface, and the portion of the second hollow member opposite to the side to be attached to the wall balustrade is open, and the first hollow member is the first hollow member. It is fitted to the hollow member of No. 2, and further, in the hollow portion of the first hollow member, a plate-like body in a substantially vertical direction substantially parallel to the facing surfaces of the wall railings adjacent to each other in the bridge axis direction. It is a shielding structure of the expansion and contraction gap of the wall balustrade, which is characterized by being erected.

When the wall balustrades adjacent to each other in the bridge axis direction are made of concrete, the first hollow member is attached to one of the facing surfaces of the wall balustrades adjacent to each other in the bridge axis direction with anchor bolts. The second hollow member may be attached by anchor bolts to the other surface of the opposing surfaces of the wall railings adjacent to each other in the bridge axis direction.

When the wall balustrades adjacent to each other in the bridge axis direction are made of steel, the first hollow member is attached to one of the facing surfaces of the wall balustrades adjacent to each other in the bridge axis direction with bolts. , The second hollow member may be configured to be attached to the other surface of the opposing surfaces of the wall railings adjacent to each other in the bridge axis direction with a bolt.

The outer shapes of the first hollow member and the second hollow member may be configured so that the vertical dimension is larger than the horizontal dimension and the shape is a rectangular parallelepiped.

According to the present invention, it is possible to provide a shielding structure for expansion and contraction gaps in a wall balustrade with improved impact resistance.

A perspective view schematically showing a shielding structure according to the first embodiment of the present invention. Side view schematically showing the shielding structure according to the first embodiment of the present invention (side view seen from the direction perpendicular to the bridge axis) Plan view schematically showing the shielding structure according to the first embodiment of the present invention (plan view seen from above) Vertical sectional view showing the first hollow member 12 and the second hollow member 14 as assembled at the factory. A vertical cross-sectional view showing a situation in which the first hollow member 12 and the second hollow member 14 assembled at the factory are installed in the field. A vertical cross-sectional view schematically showing a state in which concrete 100A of a wall column 100 is cast on site. A vertical sectional view schematically showing a state in which the construction of the shielding structure 10 according to the first embodiment is completed. Top view of the shielding structure 50 which is a modification of the shielding structure 10 according to the first embodiment. Side view schematically showing the shielding structure according to the second embodiment of the present invention (side view seen from the direction perpendicular to the bridge axis) A perspective view schematically showing a shielding structure 200 which is an example of a shielding structure of an expansion / contraction gap of a wall balustrade in which a plate-like body is arranged so as to close the expansion / contraction gap of the wall balustrade from the traveling path side. Side view of the shielding structure 200 shown in FIG. 10 as viewed from the traveling path side. A side view (side view seen from a direction perpendicular to the bridge axis) shown in FIG. 3-13 of Non-Patent Document 2 with a reference numeral.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the embodiments described below are specific examples of the present invention, and the present invention is not limited to the embodiments described below.

In the following description, the shielding structure of the expansion / contraction gap in the wall balustrade may be simply referred to as "shielding structure of the expansion / contraction gap" or "shielding structure".

(1) Configuration of Shielding Structure According to First Embodiment (1-1) First Embodiment FIG. 1 is a perspective view schematically showing a shielding structure according to the first embodiment of the present invention, and FIG. 2 is a perspective view. , Is a side view schematically showing the shielding structure according to the first embodiment of the present invention (side view seen from the direction perpendicular to the bridge axis), and FIG. 3 is a schematic view of the shielding structure according to the first embodiment of the present invention. It is a plan view (plan view seen from above) which shows. In addition, in FIG. 1 and FIG. 2, for convenience of explanation, the anchor bolt 20 existing inside the concrete 100A of the wall column 100 is also shown by a solid line. Further, the opening 12B1 (see FIG. 3) provided in the upper surface steel plate 12B of the first hollow member 12 is not shown in FIGS. 1 and 2.

The shielding structure 10 according to the first embodiment of the present invention is a shielding structure of the expansion / contraction gap 102 between the expansion / contraction gaps 102 between the wall railings 100 adjacent to each other in the bridge axis direction, and the first hollow member 12 and the shielding structure 12 It has a second hollow member 14 and an anchor bolt 20. The wall balustrade 100 is a concrete wall balustrade formed using concrete 100A.

The first hollow member 12 and the second hollow member 14 are hollow members in which steel plates are assembled in a rectangular parallelepiped shape, and as shown in FIG. 1, the vertical dimension is larger than the horizontal dimension.

The first hollow member 12 is configured by arranging steel plates on six surfaces, but the second hollow member 14 does not have steel plates arranged on the side facing the fixing steel plate 14A (see FIG. 2). Steel plates are arranged on five surfaces, and the side facing the fixing steel plate 14A is open.

The first hollow member 12 is attached by anchor bolts 20 to one surface 100B (see FIG. 2) of the opposing surfaces of the wall railings 100 adjacent to each other in the bridge axis direction. More specifically, among the steel plates constituting the first hollow member 12, anchor bolts 20 are welded to the fixing steel plate 12A (see FIG. 2), and the anchor bolts 20 are concrete of the wall column 100. It is embedded in 100A, whereby the anchored steel plate 12A is anchored to one surface 100B of the opposing surfaces of the wall railings 100 adjacent to each other in the bridge axis direction.

Among the steel plates constituting the first hollow member 12, the upper surface steel plate 12B located on the upper surface is provided with an opening 12B1, and through the opening 12B1, concrete or non-shrink mortar is formed in the hollow portion of the first hollow member 12. It is possible to fill the filler such as. The first hollow member 12 is configured by arranging steel plates on six surfaces as described above, and unlike the second hollow member 14, the first hollow member 12 is also a steel plate (on the side facing the fixing steel plate 12A). The tip steel plate (referred to as 12C) is provided, and the hollow portion of the first hollow member 12 can be filled with a filler such as concrete or non-shrink mortar.

The outer shape of the first hollow member 12 is smaller than the space formed on the inner surface of the second hollow member 14, and as shown in FIGS. 1 to 3, the first hollow member 12 has a second hollow member 12. It is fitted to the hollow member 14.

Therefore, when the wall column 100 expands and contracts due to a temperature change, the expansion and contraction of the wall column 100 remains in the state where the first hollow member 12 and the second hollow member 14 are fitted, that is, the wall column 100 adjacent to each other in the bridge axis direction. It is possible to escape without creating a gap extending in the vertical direction between them.

In other words, the shielding structure 10 of the expansion / contraction gap changes the fitting amount between the first hollow member 12 and the second hollow member 14 even if the wall height column 100 expands and contracts, so that the wall height column 100 It is possible to follow the expansion and contraction of.

Further, since the shielding structure 10 of the expansion / contraction gap is formed of the first hollow member 12 and the second hollow member 14 in which the steel plate is assembled in a rectangular parallelepiped shape, the plate-shaped body 202 is used for its impact resistance. It is improved from the expansion / contraction gap shielding structure 200 (see FIGS. 10 and 11).

Further, the upper surface steel plate 12B of the first hollow member 12 is provided with an opening 12B1, and concrete 12X is filled in the hollow portion of the first hollow member 12 through the opening 12B1. Since the hollow portion of the first hollow member 12 is filled with concrete 12X, the impact resistance of the shielding structure 10 according to the first embodiment is further improved.

The filler to be filled in the hollow portion of the first hollow member 12 is not limited to concrete, and any filler that satisfies the required performance can be used. For example, a non-shrink mortar is used instead of concrete. You may use it. Non-shrink mortar is preferable in this respect because it does not easily generate voids, but from the viewpoint of impact resistance, it is preferable to use concrete containing aggregate.

The second hollow member 14 is attached by anchor bolts 20 to the other surface 100C (see FIG. 2) of the opposing surfaces of the wall railings 100 adjacent to each other in the bridge axis direction. More specifically, among the steel plates constituting the second hollow member 14, anchor bolts 20 are welded to the fixing steel plate 14A (see FIG. 2), and the anchor bolts 20 are concrete of the wall column 100. It is embedded in 100A, whereby the anchored steel plate 14A is anchored to the other surface 100C of the opposing surfaces of the wall railings 100 adjacent to each other in the bridge axis direction.

As described above, in the second hollow member 14, the steel plate is not arranged on the side facing the fixing steel plate 14A, the portion is open, and the second hollow member 14 is formed on the inner surface of the second hollow member 14. The space to be formed is larger than the outer shape of the first hollow member 12, so that the first hollow member 12 can be fitted to the second hollow member 14.

In a state where the first hollow member 12 is fitted to the second hollow member 14 (states shown in FIGS. 1 to 3), between the outer surface of the first hollow member 12 and the inner surface of the second hollow member 14. If the interval is too large, the impact resistance and rigidity at the time of a collision of a vehicle or the like are adversely affected, and if it is too small, the outer surface of the first hollow member 12 and the inner surface of the second hollow member 14 may come into contact with each other. The sex becomes large. When the outer surface of the first hollow member 12 and the inner surface of the second hollow member 14 come into contact with each other, the wall balustrade 100 expands and contracts due to a temperature change, and the first hollow member 12 and the second hollow member 14 expand and contract. There is a possibility that the fitting portion cannot be sufficiently released and unexpected stress is generated in the first hollow member 12, the second hollow member 14, and the wall railing column 100.

From these viewpoints, in the fitted state, the distance between the outer surface of the first hollow member 12 and the inner surface of the second hollow member 14 (the direction in which the wall rail 100 expands and contracts due to temperature change (bridge axis direction)). The interval is about several tens of millimeters.

The lengths of the first hollow member 12 and the second hollow member 14 in the bridge axis direction are appropriately determined according to the amount of expansion and contraction of the wall height column 100 caused by the assumed temperature change, the length of the expansion and contraction gap in the bridge axis direction, and the like. It should be set to.

(1-2) Procedure for constructing the shielding structure according to the first embodiment FIGS. 4 to 7 are vertical cross-sectional views showing each step of an example of the procedure for constructing the shielding structure 10 according to the first embodiment. The procedure for constructing the shielding structure 10 according to the first embodiment will be described with reference to FIGS. 4 to 7.

FIG. 4 is a vertical cross-sectional view showing the first hollow member 12 and the second hollow member 14 as assembled at the factory. As shown in FIG. 4, first, the first hollow member 12 and the second hollow member 14 are assembled and manufactured in a factory.

The first hollow member 12 is assembled by arranging steel plates on six surfaces, and the second hollow member 14 is assembled by arranging steel plates on five surfaces. When assembling the steel sheet, fillet welding, partial penetration welding, etc. are used.

Anchor bolts 20 are welded to the fixing steel plate 12A of the first hollow member 12 and the fixing steel plate 14A of the second hollow member 14. Welding work of anchor bolts 20 is also performed at the factory.

FIG. 5 is a vertical cross-sectional view showing a situation in which the first hollow member 12 and the second hollow member 14 assembled at the factory are installed in the field. As shown in FIG. 5, the first hollow member 12 and the second hollow member 14 manufactured in the factory are carried into the site and installed on the ground covering portion 104 of the telescopic device.

FIG. 6 is a vertical cross-sectional view schematically showing a state in which concrete 100A of the wall balustrade 100 is cast in the field. After the first hollow member 12 and the second hollow member 14 manufactured in the factory are carried to the site and installed on the ground covering portion 104 of the telescopic device (see FIG. 5), the mold is matched to the shape of the wall column 100. The frame is arranged and concrete 100A is placed (see FIG. 6).

FIG. 7 is a vertical cross-sectional view schematically showing a state in which the construction of the shielding structure 10 according to the first embodiment is completed. When the hardening of the concrete 100A of the cast wall balustrade 100 is completed, the hollow portion of the first hollow member 12 is filled with the concrete 12X. When the hardening of the filled concrete 12X is completed, the construction of the shielding structure 10 according to the first embodiment is completed. As described above, the filler to be filled in the hollow portion of the first hollow member 12 is not limited to concrete, and for example, non-shrink mortar can be used.

(1-3) Modification Example of Shielding Structure According to First Embodiment In the shielding structure 10 according to the first embodiment, the wall thicknesses of adjacent wall railings in the bridge axis direction are substantially the same, but the first The shielding structure 50, which is a modification of the shielding structure 10 according to the embodiment, is an embodiment used when the wall thicknesses of adjacent wall railings in the bridge axis direction are not the same. The same reference numerals are used for the same members or parts as the shielding structure 10 according to the first embodiment, and the description thereof will be omitted in principle.

FIG. 8 is a plan view of the shielding structure 50, which is a modification of the shielding structure 10 according to the first embodiment, as viewed from above.

The shielding structure 50 is a shielding structure provided in the expansion / contraction gap 112 between the wall column 100 and the wall column 110. As shown in FIG. 8, the wall column 110 is thicker than the wall column 100. ..

Therefore, the shielding structure 50 includes a third hollow member 52 having a tapered portion 52A. The width of the third hollow member 52 in the direction perpendicular to the bridge axis on the opening side is such that the first hollow member 12 can be fitted well. On the other hand, the width of the third hollow member 52 on the wall balustrade 110 side in the direction perpendicular to the bridge axis is a width that matches the wall thickness of the wall balustrade 110. For this purpose, the third hollow member 52 includes a tapered portion 52A.

(2) Second Embodiment FIG. 9 is a side view (side view seen from a direction perpendicular to the bridge axis) schematically showing the shielding structure according to the second embodiment of the present invention. In the description of the shielding structure 60 according to the second embodiment, the same reference numerals are used for the same members and parts as the shielding structure 10 according to the first embodiment, and the description is omitted in principle.

In the shielding structure 10 according to the first embodiment, the hollow portion of the first hollow member 12 is filled with concrete 12X, but in the shielding structure 60 according to the second embodiment, the hollow portion is filled with concrete 12X. Instead of filling, two partition wall steel plates 64 are erected in the hollow portion of the fourth hollow member 62 in a substantially vertical direction substantially parallel to the facing surfaces 100B and 100C of the wall railings 100.

In the shielding structure 60 according to the second embodiment, instead of filling the hollow portion of the fourth hollow member 62 with a filler such as concrete, the hollow portion of the fourth hollow member 62 is filled with two partition steel plates 64. Rigidity and impact resistance are improved by erecting and reinforcing.

In the shielding structure 60 according to the second embodiment, it is not necessary to fill the hollow portion of the fourth hollow member 62 with a filler such as concrete in the field, and the workability is improved. Further, the weight is also reduced as compared with the shielding structure 10 according to the first embodiment.

In the shielding structure 60 according to the second embodiment, since the hollow portion of the fourth hollow member 62 is not filled with a filler such as concrete, the length of the fourth hollow member 62 extending in the bridge axis direction becomes long. However, since the increase in weight is relatively small, it can be suitably applied even when the length of the expansion / contraction gap 102 between the wall railings 100 adjacent to each other in the bridge axis direction is long in the bridge axis direction.

(3) Supplement The wall height columns 100 and 110 to which the shielding structure 10 according to the first embodiment, the shielding structure 50 according to the modified example of the first embodiment, and the shielding structure 60 according to the second embodiment are applied are made of concrete. However, the wall balustrade to which the present invention applies is not limited to the concrete wall balustrade, and the steel wall balustrade can also be applied.

When the steel wall balustrade is applied, directly to the opposite ends of the steel wall balustrades adjacent to each other in the bridge axis direction among the parts of the first to fourth hollow members 12, 14, 52, 62. Steel plates that are in contact and connected (fixed steel plate 12A in the case of the first hollow member 12, fixed steel plate 14A in the case of the second hollow member 14) are opposed to each other in the steel wall column adjacent to each other in the bridge axis direction. Be sure to bolt it to the steel plate at the end. In this case, if necessary, the steel plates at the opposite ends of the steel wall balustrade are reinforced and then fixed with bolts.

Alternatively, the opposite ends of the steel wall rails adjacent to each other in the bridge axis direction so that the first to fourth hollow members 12, 14, 52, 62 can be connected to the steel wall rails with anchor bolts 20. Concrete may be placed only in the part.

10, 50, 60, 200, 220 ... Shielding structure 12 ... First hollow member 12A ... Fixing steel plate 12B ... Top steel plate 12B1 ... Opening 12C ... Tip steel plate 12X ... Concrete 14 ... Second hollow member 14A ... Fixing steel plate 20, 226 ... Anchor bolt 52 ... Third hollow member 52A ... Tapered part 62 ... Fourth hollow member 64 ... Partition steel plate 100, 110, 300, 320 ... Wall railing 100A ... Concrete 100B ... Wall railing 100 adjacent in the bridge axis direction One surface of the opposing surfaces 100C ... The other surface of the wall railings 100 facing each other in the bridge axis direction 102, 112, 302 ... Expansion / contraction gap 104 ... ... Plate-shaped body 202A ... One end in the bridge axis direction 204 ... Concrete anchor 222, 224 ... Box-shaped steel member

Claims (6)

It is a shielding structure of the expansion and contraction gap of the wall balustrade provided in the expansion and contraction gap between the wall balustrades adjacent to each other in the bridge axis direction.
It has a first hollow member and a second hollow member.
The first hollow member is attached to one of the facing surfaces of the wall railings adjacent to each other in the bridge axis direction, and the second hollow member is the wall adjacent to each other in the bridge axis direction. It is attached to the other side of the facing surfaces of the balustrades,
The outer shape of the first hollow member is smaller than the space formed on the inner surface of the second hollow member, and the second hollow member is on the side opposite to the side to be attached to the wall balustrade. The portion of is open, and the first hollow member is fitted to the second hollow member.
Further, the first hollow member has a structure for shielding an expansion / contraction gap of a wall balustrade, characterized in that the hollow portion is filled with a filler. The structure for shielding a stretchable gap in a wall railing according to claim 1, wherein the filler is concrete or non-shrink mortar. It is a shielding structure of the expansion and contraction gap of the wall balustrade provided in the expansion and contraction gap between the wall balustrades adjacent to each other in the bridge axis direction.
It has a first hollow member and a second hollow member.
The first hollow member is attached to one of the facing surfaces of the wall railings adjacent to each other in the bridge axis direction, and the second hollow member is the wall adjacent to each other in the bridge axis direction. It is attached to the other side of the facing surfaces of the balustrades,
The outer shape of the first hollow member is smaller than the space formed on the inner surface of the second hollow member, and the second hollow member is on the side opposite to the side to be attached to the wall balustrade. The portion of is open, and the first hollow member is fitted to the second hollow member.
Further, in the hollow portion of the first hollow member, a plate-like body is erected in a substantially vertical direction substantially parallel to the facing surfaces of the wall railings adjacent to each other in the bridge axis direction. Shielding structure for telescopic gaps in the wall balustrade. The wall balustrades adjacent to each other in the bridge axis direction are made of concrete, and the first hollow member is attached to one of the facing surfaces of the wall balustrades adjacent to each other in the bridge axis direction with anchor bolts. The second hollow member is attached to the other surface of the facing surfaces of the wall railings adjacent to each other in the bridge axis direction by anchor bolts. The shielding structure of the telescopic gap of the wall balustrade according to any one of ~ 3. The wall balustrades adjacent to each other in the bridge axis direction are made of steel, and the first hollow member is attached to one of the facing surfaces of the wall balustrades adjacent to each other in the bridge axis direction with bolts. The second hollow member is attached to the other surface of the facing surfaces of the wall railings adjacent to each other in the bridge axis direction by a bolt, wherein the second hollow member is attached to the other surface. The shielding structure of the expansion and contraction gap of the wall railing described in any of. The outer shape of the first hollow member and the second hollow member is according to any one of claims 1 to 5, wherein the vertical dimension is larger than the horizontal dimension and the outer shape is rectangular parallelepiped. Shielding structure of the expansion and contraction gap of the described wall balustrade.