JPH1060807A - Method of jointless pavement construction of highway bridge and no-gap expansion joint structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve stability on the travelling of a car by installing a joint section covering the mutual opening of the joint of bridge girders adjacent in the bridge axial direction, spreading crushed stones all over the bridge girders and the upper section of the joint section and paving the upper sections of crushed stones without joints. SOLUTION: An expansion-joint female 9 and the steel plate 4 of an upper support section on the expansion-Joint female side are connected by a bearing 7 and a shaft 18, and a steel plate 13 and an expansion-joint male 10 are coupled by a bearing 11 and a shaft 12. When the joint male 10 is inserted into the joint female 9 and the steel plates 13, 4 are fixed between bridge girders 3 borne into the openings of the joints, an expansion joint, in which crushed stones do not get into the openings of the joints of the bridge girders and the inside of the expansion joint and which has no gap, is realized because difference between the width of the internal dimensions of the joint female 9 and the thickness of the steel plate of the joint male 10 is absorbed by sliding in the vertical direction of the joint female 9 and the joint male 10. The layer of crushed stones 2 among a paved layer 1 and the bridge girders 3 is formed, the expansion and contraction of the bridge girders 3 are absorbed to the layer of crushed stones 2, structure, in which the paved layer 1 is difficult to be affected, is formed, and the paved layer 1 having no joint is shaped, thus improving stability on the travelling of a car.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for pavement of a road bridge and a joint of the road bridge.

[0002]

2. Description of the Related Art A joint portion of a conventional road bridge appears on a running surface. FIG. 16 is a cross-sectional view in the bridge axis direction of an example of a conventional road bridge joint. FIG. 17 is a plan view of FIG. In many cases, a joint method is known in which a joint is formed of a steel material, and is formed in a zigzag manner in the longitudinal direction of the joint as shown in FIG. 17 so that a convex portion and a concave portion are formed so as to mesh with each other. In this case, a notch is formed at the joint part.

[0003]

This has the following disadvantages. (A) The constituent material of the joint 25 is an iron material, has a low coefficient of friction, and easily slips. In particular, the coefficient of friction is low and dangerous on wet or snowy roads. (B) A step is formed between the joints 25, and running stability is poor. (C) As in (b), noise is generated. (D) The joint 25 and the pavement layer 26 differ in the degree of wear, so that a level difference occurs and running stability is poor. (E) Noise is also generated in (d). (F) Construction of the pavement layer 26 takes time and effort to eliminate a step between the joint 25 and the pavement layer 26. (G) When the pavement layer 26 is repaired or repaved, the pavement layer 26 may be scraped off.
The joint 25 is in the way and difficult to construct. (H) The fitting 25 has an appropriate play space and foreign matter enters, so it is necessary to perform periodic cleaning. (I) Due to the expansion and contraction of the bridge girder 24, the step of the joint 25 is enlarged. The present invention has been made to solve these disadvantages.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a joint portion for covering a gap between bridge girders adjacent to each other in the bridge axis direction at a joint portion of a road bridge. It is characterized by being laid with gravel and crushed stones and paving over it seamlessly.

In order to prevent the above-mentioned gravel and crushed stone from entering the play in the gap between the joints of the bridge girder of the road bridge, the joint support on one side has a bottom fixed to the upper part of the bridge girder, and The bridge girder is provided with a rising part from the end of the bridge girder, and is further extended in the direction of the bridge axle from the upper part of the rising, and a bearing is provided at the lower part of the extension end in a direction intersecting with the bridge axle. Is gradually thinned, and a portion of the expansion joint female connecting three sides of a rectangular steel plate is provided with a bearing in a direction intersecting with the bridge shaft in a portion except for both inner ends, the bearing portion as described above. As well as a hinge
The opposed joint support part fixes the steel plate at the upper part of the bridge girder and at the end of the bridge girder in the bridge axis direction, installs a bearing on the upper part in the direction intersecting with the bridge axle, and intersects the bridge axle on the back part of the steel plate The expansion joint is constructed in such a way that the expansion joint male is inserted into the expansion joint female mentioned above, and the difference between the expansion and contraction of the bridge girder is formed inside the expansion joint female and the interior, in a hinge-like combination with the expansion joint male provided with a bearing in the direction It is characterized by realizing an expansion joint structure without gaps by absorbing by male vertical sliding.

[0006] When the above-mentioned layer of gravel or crushed stone can be constructed sufficiently thick, to prevent the gravel or crushed stone from entering the play space, the joint support portion on one side is provided above the bridge girder and in the bridge axis direction. A steel plate is fixed to the end of the bridge girder, and a bearing is provided at the top of the bridge girder in the direction crossing the bridge axis. The end in contact with gravel and crushed stone is opposite to the surface in contact with the gravel and crushed stone of the expansion joint whose thickness is gradually reduced. A bearing provided in the direction crossing the bridge axle in the thicker side is combined with the above-mentioned bearing part in a hinge-like manner, and the opposing joint support part is at the top of the bridge girder and at the end of the bridge girder in the bridge axis direction. A steel plate is fixed to the part, and the top of the expansion joint is configured to contact linearly on it, and when the bridge girder expands and contracts, the difference is absorbed by sliding the expansion joint in the horizontal direction to create an expansion joint structure without gaps. It is characterized by realizing.

[0007]

[Function] At the joint of a road bridge, a joint is provided to cover the gap between adjacent bridge girders in the bridge axis direction. Gravel and crushed stone are spread over the bridge girders and the upper part of the joint, and the top of the bridge is seamlessly paved. And the road surface before and after it,
Seamless pavement is obtained.

[0008] The expansion and contraction of the bridge girder due to the temperature change of the bridge girder and the deformation of the members are absorbed by the gravel and crushed stone on the bridge girder, so that the structure becomes hard to affect the pavement layer.

Further, the gravel and crushed stone laid on the upper part of the bridge girder does not enter the play gap of the road bridge because there is no space to communicate with the play gap of the road bridge.

In the gapless joint according to the second aspect, the change in volume of gravel and crushed stone caused by expansion and contraction of the bridge girder can be absorbed in the joint.

[0011]

Embodiments of the present invention will be described below. In the present invention, gravel and crushed stone 2 are spread over the bridge girder 3 in order to solve the above problems. FIG. 1 is a cross-sectional view of a seam portion of a road bridge according to the present invention in the bridge axis direction, showing the first and second embodiments. FIG. 2 is a cross-sectional view of the joint of the road bridge according to the present invention in the bridge axis direction, showing the first and third embodiments.
A joint having no gap is provided between the bridges 3 of the road bridge so that the gravel and crushed stone 2 do not enter. The present invention can be applied not only between the bridge girder of the road bridge but also between the bridge girder and the ground before and after the road by continuously constructing the gravel and crushed stones 2 in the area where the gravel / crushed stone 2 is spread. By providing the layer of gravel and crushed stone 2 between the pavement layer 1 and the bridge girder 3, the expansion and contraction of the bridge girder is absorbed by the layer of gravel and crushed stone 2, so that the pavement layer 1 is hardly affected. Therefore, it is possible to provide a continuous seamless pavement layer straddling the seam of the road bridge.

The thickness of the gravel / crushed stones 2 is closely related to the strength of the bridge, and the strength of a relatively short bridge girder can be sufficiently obtained. In this case, a joint having a structure as shown in FIG. 2 is configured. Then, the gravel / crushed stone 2 is spread with a sufficient thickness. this is,
This is because the effect of expansion and contraction of the bridge girder is less likely to be transmitted to the upper pavement layer 1 as the thickness of the layer of the gravel / crushed stone 2 is larger. In FIG. 2, the joint between the bridge girders 3 is configured as follows. FIG.
FIG. 3 is a plan view of the expansion joint supporting portion as viewed from above in FIG. 2, and a bearing 23 is formed on a steel plate 14 at the same interval as the length of the bearing 15. FIG. 9 shows the expansion joint 17 and the bearing 1.
5 is a plan view seen from below in FIG. 2, and a bearing in which the same distance as the length of the bearing 23 is provided at a lower left portion of the expansion joint 17 when the expansion joint 17 is viewed in cross section as shown in FIG. 2. 15. The expansion joint 17 and the steel plate 14 are connected by bearings 15 and 23 and a rotating shaft 16. As a result, the expansion joint 17 is moved relative to the rotating shaft 16 as viewed from the steel plate 14.
Can be rotated around. At the opposite end of the bridge girder,
The steel plate 18 is constituted. Then, the steel plates 14 and 18 are fixed to the respective bridge girders 3 such that the ends of the expansion joints 17 are overlapped on the upper portions of the steel plates 18. Thus, when the bridge girder 3 expands and contracts, the difference is absorbed by the horizontal sliding of the expansion joint 17, thereby realizing an expansion joint having no gap in which the gravel and crushed stone 2 do not enter between the bridge girder. In addition, by configuring the expansion joint 17 so as to be in contact with the steel plate 18 not by a surface but by a line, the expansion joint 17 rotates about the rotation shaft 16 not only in the bridge axis direction but also in the vertical direction. This makes it possible to absorb the movement.

In a long bridge girder, a layer of gravel / crushed stone 2 having a sufficient thickness cannot be provided due to strength. In this case, the influence of the expansion and contraction of the bridge girder 3 is easily transmitted to the upper pavement layer 1. The expansion and contraction of the bridge girder 3 involves not only a change in length but also a change in volume. The joint structure for absorbing the change in volume is the invention of claim 2. In this case, the joint between the bridge girders 3 in FIG. 1 is configured as follows. FIG.
FIG. 3 is a plan view of the expansion joint female-side upper support portion as viewed from below in FIG. 1, and a bearing 19 having the same length as the length of the bearing 7 on the steel plate 4 is formed. FIG. 5 is a front view of the expansion joint female 9 and the bearing 7 and the steel plate 20 assembled from the right side in FIG. 1, and shows the expansion joint female 9 when the expansion joint female 9 is viewed in cross section as shown in FIG. The bearings 7 are arranged at the same intervals as the length of the bearings 19 at the upper part of the bearing 7. Further, the steel plate 20 is configured for the purpose of preventing the expansion joint female 9 from being opened due to stress inside the inside of the expansion joint female 9 except for both ends. Expansion joint female 9
The steel plate 4 of the expansion joint female side upper support portion is connected to the bearings 7 and 19 by the rotating shaft 8. As a result, the expansion joint female 9 can rotate around the rotation shaft 8 when viewed relatively from the steel plate 4. Similarly, FIG. 7 is a plan view of the expansion joint male lower support portion viewed from above in FIG.
Are arranged at the same interval as the length of the bearing 22. FIG.
Is a front view of the assembled expansion joint male 10 and the bearing 11 as viewed from the right in FIG. 1, and forms a bearing 11 at the lower portion of the expansion joint male 10 at the same interval as the length of the bearing 22. Further, a notch 21 is formed so as to mesh with a steel plate 20 provided for the purpose of reinforcement inside the expansion joint female 9. The steel plate 13 and the expansion joint male 10 are connected by bearings 11 and 22 and a rotating shaft 12. Thereby, the expansion joint male 10 can rotate around the rotation shaft 12 as viewed relatively from the steel plate 13. The expansion joint female 9 is connected to the expansion joint female 9.
And fix the steel plates 13 and 14 between the bridge girders 3 with play as shown in FIG. As shown in the perspective view of the expansion joint shown in FIG. 3, the width of the inner diameter of the expansion joint female 9 is set to a size having a little play than the steel plate thickness of the expansion joint male 10, and the gravel / crushed stone 2 is easily formed. It is a play that does not enter. Thereby, when the bridge girder expands and contracts, the difference is absorbed by the vertical sliding of the expansion joint female 9 and the expansion joint male 10 formed inside, so that the gap between the gravel and the crushed stone 2 does not enter the bridge girder gap and the expansion joint inside. It is characterized by realizing a non-expansion joint. In addition, by not inserting the expansion joint female 9 and the expansion joint male 10 to the deepest part, not only in the bridge axis direction but also in the case of expansion and contraction in the vertical direction, the expansion joint female 9 and the expansion joint male formed inside are used. It is possible to absorb the movement by absorbing by sliding up and down 10.

The change in volume in the second aspect of the invention will be described. FIG. 10 is an enlarged view of the vicinity of the expansion joint in FIG. 1, and is a cross-sectional view in the bridge axis direction when the position of the bridge girder due to thermal expansion or contraction is located at a neutral point. here,
D0 is the clearance between bridge girders 3, expansion joint female 9 and expansion joint male 10
Is defined as d0 in the vertical direction. FIG. 11 is an enlarged view of the vicinity of the expansion joint in FIG. 1, and is a cross-sectional view in the bridge axis direction when the position of the bridge girder due to thermal expansion or contraction is located on the extension side. Here, the gap between the bridge girders 3 is D1 expansion joint female 9
The vertical play between the expansion joint male 10 and the expansion joint male 10 is d1. FIG. 12 is an enlarged view of the vicinity of the expansion joint in FIG. 1, and is a cross-sectional view in the bridge axis direction when the position of the bridge girder due to thermal expansion or contraction is located on the contraction side. Here, the play between the bridge girders 3 is D2, and the play between the expansion joint female 9 and the expansion joint male 10 in the vertical direction is d2. In this case, D1 is larger than D0,
The relationship holds that D2 is greater than D0, d1 is greater than d0, and d2 is greater than d0. 10, 11,
12 are simplified models, respectively.
4 and 15. A represents the height of the expansion joint, and S1, S
Reference numeral 2 denotes the surface of the movement locus of the expansion joint when the bridge girder 3 expands and contracts. FIG. 14 shows a state in which the bridge girder 3 has expanded and expanded due to a rise in temperature or the like, and the play space has been reduced from D0 to D1. At this time, the allowable volume of the layer of the gravel / crushed stone 2 increases by the volume obtained by multiplying the area of S1 by the length of the joint. Also,
FIG. 15 shows a state in which the bridge girder 3 has been reduced due to a temperature drop or the like, and the play space has spread from D0 to D2. At this time,
The allowable volume of the layer of gravel / crushed stone 2 is reduced by the volume of the area of S2 multiplied by the length of the joint. Due to the change in the allowable volume of the layer of the gravel / crushed stone 2, the change in volume of the gravel / crushed stone 2 can be absorbed by the gapless expansion joint structure of the present invention.

[0015]

According to the present invention, a seamless pavement layer can be provided on a running surface of a road bridge, and the following effects can be obtained. (A) The step at the joint is eliminated, and the running stability is improved. (B) The step at the seam is eliminated to prevent noise. (C) Since the joint is not exposed on the running surface, slip caused by a low coefficient of friction at the joint can be prevented. (D) Construction, repair, cutting, and re-paving of the pavement layer are facilitated.

[0016]

[Brief description of the drawings]

1 shows a seam of a road bridge according to the invention, FIG.
It is sectional drawing of the bridge axis direction which shows Example of this.

FIG. 2 shows a joint of a road bridge according to the present invention.
It is sectional drawing of the bridge axis direction which shows Example of this.

FIG. 3 is a perspective view of an expansion joint.

FIG. 4 is a plan view of an expansion joint female-side upper support seen from below in FIG. 1;

FIG. 5 is a front view of the assembled expansion joint female 9 and the bearing 7, viewed from the right side in FIG.

6 is a front view of the assembled expansion joint male 10 and the bearing 11, viewed from the right side in FIG. 1. FIG.

FIG. 7 is a plan view of the expansion joint male-side lower supporting portion as viewed from above in FIG. 1;

FIG. 8 is a plan view of the expansion joint supporting portion as viewed from above in FIG. 2;

FIG. 9 shows a state in which the expansion joint 17 and the bearing 15 are assembled, and FIG.
FIG. 2 is a plan view as viewed from below.

10 is an enlarged view of the vicinity of an expansion joint in FIG. 1 and is a cross-sectional view in the bridge axis direction when a bridge girder is located at a neutral point due to thermal expansion and contraction.

11 is an enlarged view of the vicinity of the expansion joint in FIG. 1, and is a cross-sectional view in the bridge axis direction when the position of the bridge girder due to thermal expansion or contraction is located on the extension side.

FIG. 12 is an enlarged view of the vicinity of an expansion joint in FIG. 1 and is a cross-sectional view in the bridge axis direction when a bridge girder is located on a contraction side due to thermal expansion or contraction.

FIG. 13 is a simplified model of FIG. 12;

FIG. 14 is a simplified model of FIG. 13;

FIG. 15 is a simplified model of FIG. 14;

FIG. 16 is a cross-sectional view in the bridge axis direction of an example of a conventional road bridge joint.

FIG. 17 is a plan view of FIG.

[Explanation of symbols]

1 Pavement layer 2 Gravel / crushed stone 3 Bridge girder 4,
5, 6 steel plate 7 bearing 8 rotating shaft 9 expansion joint female 10
Expansion joint male 11 Bearing 12 Rotary shaft 13, 14 Steel plate
15 Bearing 16 Rotary shaft 17 Expansion joint 18 Steel plate 1
9 Bearing 20 Steel plate 21 Notch 22, 23 Bearing
24 Bridge girder 25 Joint 26 Pavement layer A Height of expansion joint in vertical direction B Spacing of bridge girder D0, D1, D2 Spacing of bridge girder d0, d1, d2 Vertical clearance of expansion joint S1, S2 Surface of movement locus of expansion joint

Claims (3)

[Claims] At a joint of a road bridge, a joint is provided to cover a gap between bridge girders adjacent to each other in a bridge axis direction, and gravel or crushed stone is spread over the bridge girder and the joint, and a pavement over the joint is performed. The feature is a seamless pavement method for road bridges. 2. The joint of a road bridge according to claim 1, wherein the joint support on one side has a bottom fixed to an upper part of the bridge girder,
A rising part is provided vertically from the end of the bridge girder, and further extended from the upper part of the rising in the direction of extension of the bridge axle, and a bearing is provided at the lower part of the extension end in a direction crossing the bridge axle, and the end in contact with gravel and crushed stone The thickness of the steel plate was gradually reduced, and the portion excluding the inner ends was provided with a bearing in the direction crossing the bridge axis on the back of the expansion joint female connecting the three sides of the rectangular steel plate, as described above. The joints are hinged to the bearings, and the opposite joint support is fixed to a steel plate at the top of the bridge girder and at the end of the bridge girder in the direction of the bridge axis. The hinge joint is combined with the expansion joint male that has a bearing in the direction crossing the bridge axis in the part of the above, and the expansion joint male is inserted inside the above expansion joint female, and the difference when expanding and contracting the bridge girder is used as the expansion joint female And vertical expansion joint of the expansion joint male No gap expansion joint structure of a road bridge which is characterized in that absorbed by. 3. The joint portion of a road bridge according to claim 1, wherein the joint support portion on one side fixes a steel plate at an upper portion of the bridge girder and at an end of the bridge girder in the bridge axis direction, and intersects the bridge axle at an upper portion thereof. In the direction opposite to the surface in contact with the gravel and crushed stone of the expansion joint whose thickness is gradually reduced, the bearing in the direction intersecting with the bridge shaft is installed at the end in contact with the gravel and crushed stone. The joints are hinged to the bearings described above, and the opposite joint support is fixed to a steel plate at the top of the bridge girder and at the end of the bridge girder in the direction of the bridge axis. A gap-less expansion joint structure for a road bridge, characterized in that the expansion joint expands and contracts, and the difference is absorbed by the horizontal sliding of the expansion joint when the bridge girder expands and contracts.