JPS6017881B2 - road joint - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a joint constructed at a road joint of a bridge or elevated road.

Conventionally, joints made of rubber or steel plates have been constructed at road joints, with fixed parts fixed to the floor slabs etc. at both ends and an expansion/contraction absorption part between the two fixed parts. Since the concrete that fixed the joint member and the asphalt pavement have different materials, the wear of the road surface is uneven, and the expansion and contraction absorption part usually suffers from uneven wear. Due to the presence of high-density brakes, vehicles receive shocks to their tires when passing through road joints, impeding their running performance.In addition to the normal vibrations and noise at railway joints, they are also affected by low-frequency road waves. There was a problem in that it caused pollution.

In addition, in recent years, with the increase in the number of traffic embankments, wear of the road surface may cause a difference in level between the post-cast concrete of the joint and the pavement, or joint members may be damaged in a short period of time. The process involves removing poured concrete, removing damaged joint members, and replacing them with new ones, making the work complicated and requiring at least one hour to repair, during which time traffic must be closed. There was a problem.

On the other hand, as described in Hakama Seki Sho-14-kyu No. 3, steel comb-like plates are fixed on the floorboards on both sides of the gap at the road joint, and the dendritic plate and its interlocking gap are Joints in which the above pavement is continuously applied are also known, but due to the difference in the materials between the comb-shaped plates and the pavement, there is a problem that the adhesion is low and the pavement is likely to peel off or shift. In view of these points, the present invention provides a pair of lower joint means having a concrete portion with a corrugated end face at the pavement joint, and continuously applies paving over the lower joint means and the interlocking gap thereof. By bringing the means into direct contact with the pavement through a concrete part of similar material to the pavement, the adhesion to the lower joint means of the pavement is improved, the above conventional problems are solved, and vehicle running safety is ensured. This is what I am trying to do.

In the present invention, in order to prevent damage to the pavement by dispersing and absorbing the tensile and compressive forces associated with the expansion and contraction of the road, the upper surface of the lower joint means is lower than the upper surface of the floor plate, and the upper surface of the joint pavement and gap is lower than the upper surface of the floorboard. In order to increase the thickness of the pavement and further improve the adhesion of the joint section to the lower joint means, the joint pavement and the lower joint means are connected by a connecting member.

Therefore, an important feature of the present invention is that by making the upper surface of the lower joint means lower than the upper surface of the floorboard, the upper end of the upper woven fence can be lowered to match the height of the flooring surface. This ensures a relatively thick pavement thickness above the connecting members, prevents cracks from forming at the connecting members, and prevents the joints from coming out due to pavement wear. I'm trying to do that.

Embodiments of the present invention will be described below with reference to the drawings. Example 1 This example is shown in FIGS. 1 and 2, where la is a road joint, and a notch step 3 is provided at the end of the opposing floorboards 2, 2.
, 3 are formed, and concrete is cast in both notch steps 3, 3 to form lower joint means 4a, 4a having a corrugated surface 8 with an interlocking clearance 9, and the upper surface 2a, A deck upper surface pavement 5a, a joint section pavement 5b, and an upper gap pavement 5c are continuously applied on the lower joint means 4a, 4a and the interlocking gap 9, respectively.

The lower joint means 4a has a plurality of protrusions 7 protruding from the base 6, and its upper surface is formed lower than the upper surface of the floor slab 2a. Further, a bottom stopper member 11 is provided below the protrusion 7, and when the road expands and contracts with the bottom stopper, the lower edge of the protrusion 7 is attached to the edge of the bottom surface of the opposing notch step 3. Preventing collision.

Note that the sealing means 1 is constructed by filling a liquid sealing rubber material or by applying an elastic material such as rubber. A U-shaped reinforcing bar 12 is embedded in the lower joint means 4a, and a connecting bar 13 is connected to the reinforcing bar.

The rising part of the connecting bar 13 is piece-shaped, and the upper part of the connecting bar 13 is buried in the joint pavement 5b, and the lower part is buried in the lower joint means 4.
a, the joint pavement 5b and the lower joint means 4
A connecting line 14 extending toward the middle of the road is connected to the upper end of the connecting line 13 provided on the base 6 side of the lower joint means 4a. 26 is a distribution muscle.

The floor plate upper surface pavement 5a, the joint portion pavement 5b, and the gap upper pavement 5c are formed by continuously pouring a paving material containing bituminous material such as asphalt or tar, and each pavement 5a,
The upper surfaces of 5b and 5c are formed flush with each other, and a cut groove 15 is created in the direction toward the middle of the road.

In FIG. 1, the boundaries between the pavements 5a, 5b, and 5c are indicated by chain lines. Note that the cut grooves 15 are provided with grooves when cracks are likely to occur, and a filler such as tar or liquid seal rubber may be injected into the grooves.

In this example, since each of the pavements 5a, 5b, and 5c is continuous, the wear of the bottom surface due to rutting is uniform, so the running performance of the vehicle is good, and vibrations, noise, and low frequencies are not generated.

Furthermore, since the protrusions 7, 7 of the lower joint means 4a, 4a are meshed with each other with a wave-shaped meshing clearance 9, the operating weight of a passing vehicle is not directly applied to the meshing clearance 9, but is applied to the lower joint parts 4a, 4a. In order to transition from one protrusion 7 of the joint means 4a, 4a to the other protrusion 7, the gap upper paving 5c to the meshing gap 9
The cave-in is prevented. Furthermore, since the lower joint means 4a is made of thick concrete, it has a high degree of reinforcement resistance and is excellent in durability. The lower joint means 4a is made of concrete similar in quality to the paving material, and since the upper surface of this concrete is in direct contact with the joint pavement 5b, the lower joint means 4a and the joint pavement 5b, and prevents the pavement 5b from peeling off or shifting from the lower joint means 4a. Furthermore, since the lower joint means 4a and the joint pavement 5b are connected by the connecting reinforcements 13 and the connecting reinforcements 14, the connecting reinforcements 13 and the connecting reinforcements 14 are also very effective in preventing peeling and displacement of the pavement. is playing. Incidentally, each of the pavements 5a, 5b, 5c is subjected to tension and compression due to the expansion and contraction of the floorboard 2, but the pavements are provided with grooves 15 that absorb expansion and contraction, and the pavement material has a certain degree of elongation. Since a loud noise material is applied, it is constantly compressed and leveled from above by the wheel load caused by passing vehicles, which suppresses the occurrence of bulges and cracks in the paving material.

In addition, when bituminous paving materials age, they may shrink, especially in the cold season, and cause cracks at road joints, but these cracks are filled with tar, liquid seal rubber, etc. In addition, even if aging progresses further and damage such as cracks becomes severe, only the damaged part of the pavement can be removed and resurfaced in an extremely short time of about one hour. Since repairs can be completed within a short period of time, there is no need to shut down traffic for long periods of time, unlike traditional joint repairs. Then, the joint pavement 5b and the upper gap pavement 5c
is thicker than the floor plate upper surface pavement 5a by the amount that the upper surface of the lower joint pavement 4a is lower than the floor plate upper surface 2a,
The ability to disperse and absorb tensile and compressive forces accompanying expansion and contraction of the floorboard 2 is high.

The upper end of the connecting line 13 is made lower than the upper surface 2a of the floor slab, so that the connecting line 13 does not cause cracks. In other words, if the upper end of the connecting reinforcement 13 is located at a higher level, the pavement becomes thinner at the connecting reinforcement 13, and the pavement is more likely to be divided by tensile force.
Since the thickness of the pavement above the connecting strips 13 is thick enough to be comparable to that of the upper surface pavement 5a of the slab, the occurrence of cracks is prevented, and the pavement is also prevented from being relatively heavily worn or removed by snowplows, spiked tires, etc. Even if the bonding streaks 13 are exposed, the bond lines 13 will not be exposed until abrasion comparable to the thickness of the pavement on the upper surface of the deck occurs. In addition, in FIG. 1, the notch step portion 3 is
The boundary between the lower joint means 4a and the floor slab 2 is shown by a dashed dotted line, but this is for the case where the lower joint means 4a is formed by forming the notch step 3 in the floor slab 2. In some cases, the plate 2 and the lower joint means 4a are simultaneously pounded continuously. In the case of continuous pouring in this manner, the end of the floor slab 2 becomes the base 6 of the lower joint means 4a. Embodiment 2 This example is shown in FIG. 3, and while the lower joint means 4a of Example 1 was made of only concrete, the lower joint means 4b of this example was composed of a corrugated end plate 16 and post-cast concrete 17. Regarding joint lb.

That is, the lower seam means 4b. "b" is formed by placing corrugated end plates 16 and 16 facing each other with an interlocking gap 9, and pouring concrete 17 and 17 on the backs of both corrugated machine side plates 16 and 16.

18 is an anchor reinforcement, 19 is a bottom plate, and 20 is a weir plate for preventing concrete leakage when pouring concrete 17 is placed.

In this example, the protruding portion 7 of the lower joint means 4b is reinforced by the corrugated end plate 16, the bottom plate 19, and the anchor reinforcement 18, so that the reinforcement resistance of the lower joint means 4b is high.

Note that the post-cast concrete 17 and the floor slab 2 may be poured simultaneously and consecutively.

Further, the upper surface of the lower joint means 4b is lower than the upper surface of the floor slab 2a, similar to the first embodiment. Embodiment 3 In this example, only the main parts are shown in FIG. 4, and the lower joint means 40, 4
This invention relates to a joint lc in which a load receiving plate 21 is provided on top of the joint lc to prevent the pavement from sinking into the meshing gap 9.

That is, the load receiving plate 21 is made of a substrate 22 made of a rubber plate or a steel plate, and thin plates of recycled rubber-based non-vulcanized adhesive plastic material 23, 23 are fixed to the lower surface or both the upper and lower surfaces as shown in the figure. The adhesive plastic body connects the substrate 22 and the pavement 5b.
, 5c and the lower joint means 4b.

The other configurations are the same as in the second embodiment. Note that there are cases where only an iron plate is used as the load receiving plate. Example 4 This example shows only the main part in Fig. 5, and is a joint l in which grid plates 24 are buried in the pavement to prevent the paving material from sinking and cracking.
Regarding d.

That is, the lattice plate 24 is fixedly supported at or near the upper end of the connecting bars 13, and the through holes 25 of the lattice plate 24 connect the paving materials above and below the lattice plate into one piece, thereby preventing vehicles traveling long distances. Since the wheel load is received by the lattice plate 24, it is not directly applied to the meshing clearance 9, and cracks are also prevented by the lattice plate 2.
It can be stopped at 4.

To prevent this cracking, a net-shaped expansion metal may be used instead of the grid plate 24. In FIG. 5, the hatching of the paving material that enters the through holes 25 of the grid plate 24 is omitted. The other configurations are the same as in Example 2. The load receiving plate 21 explained in Example 3 and Example 4 above,
The lattice plate 24 and expansion metal are as in Example 1.
Of course, this can also be applied to joint la in the same way.

In addition, Examples 1 to 4 were applied to a road bridge having a structure in which a deck slab 2 was cast on a nail girder, but the present invention is applicable to a prestressed concrete girder bridge and a reinforced concrete girder bridge. The present invention can also be applied to girder bridges in the same manner as in each of the above embodiments.

As described above, according to the present invention, since the pavement is continuous at the road joint, the running performance of the vehicle is good, vibration, noise and low frequency generation are prevented, and the lower joint means is connected to the corrugated mesh. Since they are meshed with a clearance, the pavement is prevented from sinking into the meshing clearance, and furthermore, since the concrete part of the lower joint means is in direct contact with the joint pavement,
This joint pavement has high adhesion to the lower joint means,
Peeling and shifting movements are prevented, ensuring vehicle running safety, and even if the pavement is damaged, it can be repaired in an extremely short time, which is an excellent effect.

In addition, since the upper surface of the lower joint means is lower than the upper surface of the deck slab, the joint pavement becomes thicker and the occurrence of cracks due to expansion and contraction of the deck slab is suppressed, and the joint pavement and the lower joint means are Since they are joined at the joining part, peeling and shifting of the pavement at the joint part is reliably prevented.Furthermore, it is possible to thicken the pavement above the joining part, which prevents the occurrence of cracks caused by the joining parts. Exposure of joints due to wear of the pavement is also prevented. Simple Explanation of the Drawings The drawings illustrate embodiments of the present invention, and FIG. 1 is a sectional view in the bridge length direction showing the joint of Example 1, and FIG. 2 is a plan view showing the state before the paving material is placed. , FIG. 3 is a cross-sectional view in the bridge length direction showing the joint of Example 2, FIG. 4 is a cross-sectional view in the bridge length direction showing the main parts of the joint in Example 3, and FIG. 5 is the main part of the joint in Example 4. It is a sectional view in the bridge length direction showing.

la, lb, lc, ld...joint, 2...floor slab, 2a
... Floor slab top surface, 4a, 4b... Lower joint means, 5a... Floor slab top surface pavement, 5b... Joint part pavement, 5c... Interval upper pavement, 8... End surface, 9... Interlocking space, DESCRIPTION OF SYMBOLS 10... Sealing means, 12... Reinforcement bar, 13... Connecting bar, 14.
... Connecting bar, 15... Cut groove, 16... Corrugated machine face plate,
21... Load receiving plate, 22... Substrate, 23... Adhesive plastic body, 24
...Lattice plate, 25...Through hole.

Heron figure Atsushi figure 2 *Figure Figure 5 Figure 3

Claims (1)

[Claims] 1 A lower joint means having a pair of end face corrugated concrete parts at the road joint part has an interlocking gap and is installed oppositely with its upper surface lower than the upper surface of the deck slab, and the upper surface of the deck slab, the lower joint means and the interlocking gap The upper surface of the slab, the joint pavement, and the upper gap pavement are consecutively applied using the same paving material, and the upper surfaces of the slab upper surface pavement, the joint pavement, and the upper gap pavement are flush with each other. A road joint characterized in that the upper part is buried in the joint pavement and the lower part is buried in the concrete part, so that the joint pavement and the lower joint means are connected by a connecting member.