JP3611551B2 - Protection device for expansion joint for road bridge - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a protection device for expansion joints for road bridges.
[0002]
[Prior art]
On road bridges in snowy areas, plow guide plates are installed on both sides of the expansion joint to prevent snow plows from snow plows. The plow guide plate has an upper end surface that gradually increases as it goes forward, and its front end surface is welded to the expansion joint to guide the snow plow onto the expansion joint so as not to be caught by the expansion joint. It is like that.
[0003]
Japanese Utility Model Publication No. 62-5044 describes that a minute gap is provided between the plow guide plate and the expansion joint. The minute gap is provided to protect the expansion joint by preventing impact from being applied to the expansion joint when the snow plow hits the plow guide plate.
[0004]
[Problems to be solved by the invention]
However, when a minute gap is provided between the plow guide plate and the expansion joint, the plow guide plate is likely to be displaced due to the collision of the snow plow, and the desired guide effect may not be obtained. Moreover, there is a concern that the snow plow directly collides with the expansion joint and damages the expansion joint.
[0005]
In contrast, when the plow guide plate is directly attached to the expansion joint, it is advantageous in terms of guiding the snow plow, but when the snow plow is guided against the plow guide plate, an impact is applied to the expansion joint via the plow guide plate. It becomes easy to cause early breakage of the expansion joint.
[0006]
Therefore, the present invention prevents the expansion joint from being damaged by an impact during the induction of the snow plow while ensuring the induction of the snow plow.
[0007]
[Means for Solving the Problems]
The present invention provides a protection member for protecting the expansion joint from the snow plow against such a problem, and attaches the plow guide member to the protection member.
[0008]
That is, the invention according to claim 1 is a protection device for a road bridge expansion joint that allows expansion and contraction of the road bridge body and allows the wheels to travel on the road bridge joint portion without hindrance,
A protective member that is disposed on one or both sides of the expansion joint and protects the expansion joint from an impact when passing through the vehicle;
It is provided outside the protection member when viewed from the expansion joint, and is arranged at an interval in the longitudinal direction of the road bridge joint, so that the snow plow of the snowplow passes over the protection member and the expansion joint. A plurality of plow guiding members for guiding,
The protective member is supported by the road bridge body, extends in the longitudinal direction of the road bridge joint, and supports the expansion joint so that the upper surface thereof is at the same height as the upper surface of the protective member,
The plow guiding member has an inclination guiding portion that extends in the bridge axis direction and is inclined so as to gradually increase toward the front end on the upper surface, and the front end surface is coupled to the protection member, and the front end of the inclination guiding portion Is provided at the same height as the upper surface of the protective member ,
An impact absorbing material is sandwiched between the expansion joint and the protective member .
[0009]
Therefore, the snow plow of the snowplow is guided by the inclination guiding portion of the plow guiding member to reach the upper surface of the protection member, and then shifts to the upper surface of the expansion joint, so that it is prevented from being caught by the expansion joint. Thus, the impact when the snow plow hits the plow guiding member is received by the protective member and absorbed by the shock absorbing material, and the impact force transmitted from the protective member to the expansion joint is reduced. That is, it is possible to avoid a large impact acting directly on the expansion joint. Further, even if the snow plow hits the protective member directly, it does not hit the expansion joint directly.
[0010]
The invention according to claim 2 is a protection device for a road bridge expansion joint that allows expansion and contraction of the road bridge body and allows the wheels to travel on the road bridge joint portion without hindrance,
Protective members that are disposed on both sides of the expansion joint and protect the expansion joint from impact when passing through a vehicle,
It is provided outside the protection member when viewed from the expansion joint, and is arranged at an interval in the longitudinal direction of the road bridge joint, so that the snow plow of the snowplow passes over the protection member and the expansion joint. A plurality of plow guiding members for guiding,
The protective member is supported by the road bridge body, extends in the longitudinal direction of the road bridge joint, and supports the expansion joint so that the upper surface thereof is at the same height as the upper surface of the protective member,
The plow guiding member has an inclination guiding portion that extends in the bridge axis direction and is inclined so as to gradually increase toward the front end on the upper surface, and the front end surface is coupled to the protection member, and the front end of the inclination guiding portion Is provided at the same height as the upper surface of the protective member,
The center part is arrange | positioned so that the lower side of the said expansion joint may be crossed, and both sides are provided with the sealing board clamped between the both sides | surfaces of an expansion joint, and the protection member of the both sides.
[0011]
Therefore, the snow plow of the snowplow is guided by the inclination guiding portion of the plow guiding member to reach the upper surface of the protection member, and then shifts to the upper surface of the expansion joint, so that it is prevented from being caught by the expansion joint. Thus, the impact when the snow plow hits the plow guide member is received by the protective member and absorbed by both sides of the seal plate to protect the expansion joint. Moreover, water leakage from the expansion joint to the bridge is prevented by the seal plate.
[0012]
【The invention's effect】
As described above, according to the present invention, together with the protective member is supported on the road bridge body, supporting the expansion joint in the protective member so that its upper surface is flush with the upper surface of the protective member, and expansion joint Since the shock absorber is sandwiched between the protective member and the plow guiding member is attached to the protective member, the snow plow of the snowplow can be reliably guided to the upper surface of the expansion joint by the plow guiding member and the protective member. since impact when the Sunoupurau hits the plow guide member is Ru is absorbed by the receiving is an impact-absorbing material with a protective member, it is not possible to effect a large impact directly on the expansion joint, moreover, Sunoupurau impinge directly on the expansion joint This is advantageous in preventing damage to the expansion joint.
[0013]
According to the second aspect of the present invention, the protection members disposed on both sides of the expansion joint are supported by the road bridge body, and the expansion joints are attached to the two protection members so that the upper surface thereof is the same height as the upper surface of the protection member. At the same time, a plow guide member is attached to the protective member, and the center portion is arranged so as to cross the lower side of the expansion joint, and both side portions are sandwiched between the side surfaces of the expansion joint and the protective members on both sides. Since the snow plow of the snowplow can be reliably guided to the upper surface of the expansion joint by the plow guiding member and the protective member, the impact when the snow plow hits the plow guiding member is protected. Since it is received by the member and absorbed by the seal plate, a large impact does not directly act on the expansion joint, and the snow plow does not directly collide with the expansion joint. Ri, advantageously becomes prevention of damage expansion joint, further, it is possible to leakage prevention from expansion joint site by sealing plates.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, it demonstrates from the form used as the reference of embodiment of this invention previously.
[0015]
< Reference form >
In the joint structure of the road bridge shown in FIG. 1, 1 is a gap between the road bridge bodies 2 and 2, 3 is an expansion joint provided on the gap 1, and 4 and 4 are protections disposed on both sides of the expansion joint 3. Device. Notched stepped portions 5 and 5 for installing the expansion joint 3 and the protective devices 4 and 4 are formed at opposite ends of the road bridge main bodies 2 and 2, and the notched stepped portions 5 and 5 are expanded and contracted. After the joint 3 and the protection devices 4 and 4 are installed, post-cast concrete 6 and 6 are placed. 7 is a pavement.
[0016]
The expansion joint 3 is constituted by a pair of joint members 8 and 8. The joint members 8, 8 are formed by forming a lateral plate portion projecting toward the other side at the upper end of a longitudinal plate portion extending in the longitudinal direction of the road bridge joint portion. As shown in FIG. 2, a wave play 9 that allows expansion and contraction of the road bridge body 2 is formed between both lateral plate portions. The horizontal plate portion having the corrugated play 9 allows the wheels to travel on the road bridge joint without any trouble.
[0017]
Support members 11, 11 having an L-shaped cross section are fixed inside the lower end of each vertical plate portion of the joint members 8, 8, and an elastic lower receiving material 12 is supported on the support members 11, 11, A sponge 13 is filled on the receiving material 12, and a rubber seal material 14 is filled on the sponge 13. In addition, a plurality of bolts 15 project from the upper portion and the lower portion of the back portion of the joint member 8 at intervals in the joint portion longitudinal direction.
[0018]
The protection device 4 protects the expansion joint 3 from an impact when a vehicle such as a snowplow passes, and the snow plow of the snowplow passes over the expansion joint 3 and the protection plate 16. And a plurality of plow guide plates (guide members) 17 for guiding in this manner. The plow guide plate 17 is provided outside the protective plate 16 when viewed from the expansion joint 3, and is arranged at an interval in the longitudinal direction of the road bridge joint as shown in FIG.
[0019]
The protection plate 16 extends in the longitudinal direction of the road bridge joint portion with the plate surface being vertical, and the plate thickness thereof is thicker than that of the joint member 8. The protection plate 16 is supported on the road bridge body 2 by an anchor 18 projecting from the back and the plow guide plate 17. Thus, the protection plate 16 supports the expansion joint 3 so that the upper surface thereof is the same height as the upper surface of the protection plate 16. That is, a plurality of through holes are formed in the upper and lower portions of the protection plate 16 at intervals in the longitudinal direction of the road bridge joint, and the bolts 15 of the expansion joint 3 are inserted into the through holes. The expansion joint 3 is supported on the protective plate 4 by applying a nut to the protective plate 4.
[0020]
The plow guide plate 17 has an inclined guide portion 19 that extends in the direction of the bridge axis with the plate surface vertical, and is inclined so as to gradually increase toward the front end on the upper surface. The front end surface of the plow guide plate 17 is coupled to the back surface of the protection plate 16, and the front end of the inclined guide portion 19 is provided at the same height as the top surface of the protection plate 16. A through hole 21 is formed in the plow guide plate 17, and a through line 22 extending in the longitudinal direction of the road bridge joint is passed through the through hole 21.
[0021]
A rubber seal plate 23 containing reinforcing fibers is provided below the expansion joint 3. The rubber seal plate 23 has both sides extending through the lower side of the protective plates 16 and 16 to the back surface thereof, and is sandwiched between the back surfaces by pressing plates 24. Further, a seal receiving portion extends from the lower end of the pressing plate 24 to the gap 1 so that the rubber seal plate 23 does not come into contact with the notch step portion 5 of the road bridge body 2. A sponge 25 is packed between the rubber seal plate 23 and the expansion joint 3.
[0022]
The pavement 7 reaches the back surface of the protection plate 16 from the upper surface of the road bridge body 2 through the post-cast concrete 6 of the notch step portion 5. The upper surface of the pavement 7 is formed to be several mm higher than the upper surfaces of the expansion joint 3 and the protection plate 16, and descends downward as it approaches the protection plate 16 and continues to the upper surface of the protection plate 16.
[0023]
Therefore, with the road bridge joint structure as described above, even if the upper surface of the pavement 7 is worn down and lower than the upper surfaces of the protection plate 16 and the expansion joint 3, the snow plow of the snowplow is inclined to guide the plow guide plate 17. It will be induced | guided | derived to the part 19 and will reach the upper surface of the protection board 16, and will transfer to the upper surface of the expansion joint 3 from there. Therefore, the snow plow does not get caught on the protection plate 16 or the expansion joint 3 to destroy them.
[0024]
Thus, since the impact when the snow plow hits the plow guide plate 17 is received by the protective plate 16, it is possible to avoid a large impact directly acting on the expansion joint 3 itself. In this case, since the protective plate 16 is thick, damage due to the impact is avoided. Even if the snow plow hits the protective plate 16 directly, it does not hit the expansion joint 3 directly. That is, the expansion joint 3 is protected by the protection plate 16.
[0025]
< Embodiment 1 >
FIG. 3 shows only the main part of this embodiment. This embodiment is characterized in that both sides of a rubber seal plate (elastic shock absorber) 27 containing reinforcing fibers are sandwiched between the expansion joint 3 and the protection plates 16 and 16 on both sides thereof. It is the same as the reference form . That is, the rubber seal plate 27 is disposed so that the central portion thereof crosses the lower side of the expansion joint 3, and the joint members 8, 8 and the protective plates on both sides thereof so that both side portions cover both side surfaces of the expansion joint 3. 16 and 16 are sandwiched between them.
[0026]
Therefore, when the snow plow hits the plow guide plate 17, the impact is transmitted to the protection plate 16. However, since the both sides of the rubber seal plate 27 are provided between the protection plate 16 and the expansion joint 3, the impact is Absorbed at both sides of the rubber seal plate 27, the expansion joint 3 is protected from impact. In addition, rainwater is prevented from entering between the expansion joint 3 and the protective plate 16 by both side portions of the rubber seal plate 27, and rainwater that has entered from the play 9 of the expansion joint 3 penetrates below the expansion joint 3. Even if it comes out, it is received by the rubber seal plate 27, which is advantageous in preventing water leakage under the bridge.
[0027]
< Embodiment 2 >
FIG. 4 shows only the main part of this embodiment. In this embodiment, the shock absorbing material (elastic member) 28 and the both sides of the rubber seal plate (elastic member) 27 containing reinforcing fibers are sandwiched between the expansion joint 3 and the protective plates 16 and 16 on both sides thereof. The others are the same as the reference embodiment .
[0028]
That is, the shock absorber 28 is provided so as to cover the entire side surface of the expansion joint 3. The rubber seal plate 27 is disposed so that the center thereof crosses the lower side of the expansion joint 3, and the joint members 8, 8 and the joint members 8, 8 are disposed so that the both sides thereof cover the shock absorbers 28, 28 on both sides of the expansion joint 3. It is clamped between the protection plates 16 and 16 on both sides. Cylindrical sponge materials 13 and 13 are inserted between the joint members 8 and 8 of the expansion joint 3 facing each other to receive the rubber seal plate 27 and filled with the rubber seal material 14.
[0029]
A plurality of expansion joints 3 and protective plates 16 having a predetermined length (for example, 1800 mm) are jointed and installed in the joint portion longitudinal direction at the joint portion of the road bridge. In that case, as the shock absorber 28, a material having the same length as the expansion joint 3 and the protective plate 16 is adopted, and a plurality of shock absorbers 28 are set in contact with each other in the longitudinal direction of the joint portion. What extended continuously over the expansion joint 3 or what extended in series over the seam part full length is employ | adopted. In addition, the protective plate 16 may be one that continuously extends across the plurality of expansion joints 3.
[0030]
Therefore, when the snow plow hits the plow guide plate 17, the impact is transmitted to the protective plate 16, but both side portions of the rubber seal plate 27 and the shock absorbing material 28 are provided between the protective plate 16 and the expansion joint 3. The impact is absorbed by both side portions of the rubber seal plate 27 and the impact absorbing material 28, and the expansion joint 3 is protected from the impact. Further, the rainwater is prevented from permeating between the expansion joint 3 and the protection plate 16 by the both side portions of the rubber seal plate 27 and the shock absorbing material 28, and the rainwater entering the expansion joint 3 from the play 9 is inside the expansion joint. Even if it oozes down below 3, it is received by the rubber seal plate 27, which is advantageous for preventing water leakage under the bridge.
[0031]
Further, since the rubber seal plate 27 continuously extends across the plurality of expansion joints 3, water leakage from the joint portion between the expansion joints 3 is prevented. In the case of embodiment 1, it is so arranged promote shock absorption in rubber seal plate 27 itself, in order to obtain the desired shock absorbing effect it is necessary to seal plate thicker, the present embodiment 2 In this case, since the shock absorber 28 is provided separately from the seal plate, the seal plate itself can be made thin, which is advantageous for cost reduction.
[0032]
In each of the above embodiments, the pavement 7 is placed so as to reach the back surface of the protection plate 16. However, the post-cast concrete 6 on the notch step portion 5 is placed up to the road surface height and the back of the protection plate 16 is placed. The road surface may be formed of post-cast concrete 6.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a road bridge joint structure according to a reference embodiment of the present invention with a part (part of post-cast concrete) omitted.
FIG. 2 is a plan view in which a part (a part of post-cast concrete) showing the joint part structure is omitted.
FIG. 3 is a cross-sectional view showing a main part of a road bridge joint structure according to Embodiment 1 of the present invention.
FIG. 4 is a cross-sectional view showing a main part of a road bridge joint structure according to Embodiment 2 of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Spacing 2 Road bridge body 3 Expansion joint 4 Protection device 16 Protection board (protection member)
17 Plow guide plate (guide member)
27 Rubber seal plate (elastic member)
28 Shock absorber (elastic member)

Claims (2)

A protection device for expansion joints for road bridges that allows expansion and contraction of the road bridge body and allows the wheels to travel on the road bridge joints without hindrance,
A protective member that is disposed on one or both sides of the expansion joint and protects the expansion joint from an impact when passing through a vehicle;
It is provided outside the protection member as viewed from the expansion joint, and is arranged at an interval in the longitudinal direction of the road bridge joint, so that the snow plow of the snowplow passes over the protection member and the expansion joint. A plurality of plow guiding members for guiding,
The protection member is supported by the road bridge body, extends in the longitudinal direction of the road bridge joint, and supports the expansion joint so that the upper surface thereof is at the same height as the upper surface of the protection member,
The plow guide member has an inclination guide portion that extends in the bridge axis direction and is inclined so as to gradually increase toward the front end on the upper surface, and the front end surface is coupled to the protection member, Is provided at the same height as the upper surface of the protective member ,
An apparatus for protecting an expansion joint for road bridges , wherein an impact absorbing material is sandwiched between the expansion joint and the protection member . A protection device for expansion joints for road bridges that allows expansion and contraction of the road bridge body and allows the wheels to travel on the road bridge joints without hindrance,
Protective members that are arranged on both sides of the expansion joint and protect the expansion joint from impact when passing through the vehicle,
It is provided outside the protection member as viewed from the expansion joint, and is arranged at an interval in the longitudinal direction of the road bridge joint, so that the snow plow of the snowplow passes over the protection member and the expansion joint. A plurality of plow guiding members for guiding,
The protection member is supported by the road bridge body, extends in the longitudinal direction of the road bridge joint, and supports the expansion joint so that the upper surface thereof is at the same height as the upper surface of the protection member,
The plow guide member has an inclination guide portion that extends in the bridge axis direction and is inclined so as to gradually increase toward the front end on the upper surface, and the front end surface is coupled to the protection member, Is provided at the same height as the upper surface of the protective member,
A road bridge, characterized in that a central part is arranged so as to cross the lower side of the expansion joint, and both side parts are provided with seal plates sandwiched between both side surfaces of the expansion joint and protective members on both sides thereof. Expansion joint protection device.

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