JPH0718125B2 - Pavement method for road joints and pavement member for road joints used in the method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a pavement method for a road joint such as a bridge or an elevated road, and a pavement member dedicated to the road joint used in the method.

(Prior Art) As a paving member dedicated to a road joint, a series of paving material layers formed of a material similar to that of road paving on a floor slab on a pair of supporting members separated by a gap and left and right. It is known that the support member and the pavement material layer are joined by a joining means (see Japanese Patent Publication No. Sho 60-39801).

The above-mentioned pavement member is produced in advance in a factory or the like and transported to a construction site, and is installed at both ends of the floor slabs facing each other with a clearance between the road joints to form a joint pavement for blind joints. The supporting member is formed by using a hard plate such as a steel plate, a synthetic resin plate, or a fiber reinforced plastic plate, and the pavement material layer is formed by asphalt pavement material, goose asphalt pavement material, resin mortar, resin concrete, or the like. Has been done.

On the other hand, when forming a blind joint, an aggregate is laid in the recess formed in the road joint, rubber-containing bituminous material is injected, and a pavement material is prepared by mixing rubber-containing bituminous material and aggregate. The technique of placing a cable is also generally known (JP-A-
62-225610).

(Problems to be Solved by the Invention) In the case of the above pavement member, expansion and contraction of roads and vertical displacement of bridge girder ends are absorbed by the pavement material layer, but the function of the pavement material layer that the support member applies is reduced. There is a problem. That is, the support member is provided for fixing the pavement material layer to the road end, but because of the use of anchors and bolts for this fixation, the support member is made of a material different from the pavement material layer,
In other words, there is no choice but to form it with a rigid plate. Since the support member and the pavement material layer made of different materials have poor adhesiveness, a connecting means such as a protrusion from the support member is used for connecting the both. Therefore, in the pavement material layer, the portions that are joined to the left and right support members by the joining means are prevented from expanding or contracting, and the expansion and vertical displacement of the road is mainly absorbed between the joining means of the left and right supporting members. Must. Therefore, the portion of the pavement material layer that sufficiently functions as a pavement member dedicated to the road joint is in a narrow range, and it becomes difficult to effectively absorb the expansion and contraction and vertical displacement of the road, and the stress around the coupling means is reduced. It becomes concentrated and cracks are easily generated from the portion of the coupling means.

Also, when installing the pavement member to the road joint, it takes time and effort to install it because anchors etc. are used, and although it is a prefabricated pavement member manufactured at a factory, etc., it is not possible to sufficiently simplify the construction. There's a problem.

On the other hand, it is conceivable to apply a bituminous material containing rubber and an aggregate to the pavement material layer of the above pavement member.However, although the performance of the pavement material layer can be improved, the support member and anchor etc. It does not provide a basic solution to the above problems.

Further, the surface height of the pavement member is determined by the height of the anchor bolts to be planted by using the setter, but using the setter requires time and effort for construction. Moreover,
Insufficient filling of concrete to be anchored for fixing anchor bolts is likely to occur in the lower surface of the setter, and this insufficient filling adversely affects the mounting stability and thus the durability of the paving member.

On the other hand, in the method of placing the rubber-containing bituminous material at the construction site, construction becomes difficult when the gradient in the longitudinal direction and width direction of the road is large, and the aggregate needs to be heated in advance, It is difficult to control the heating temperature in relation to the outside air temperature, and the rubber bituminous material may be rapidly cooled depending on the outside air temperature, which may result in more voids and unstable performance.

(Means for Solving Problems) The invention according to claim 1 which solves the above problems is lower than the road surface at each of the road end portions which face each other across the gap between the road joints. Form a step-down surface, apply an adhesive to both of the step-down surfaces, and use rubber or a binder mainly composed of rubber and a bituminous material and an aggregate to form a block shape and penetrate vertically. A pavement member having holes is laid on the step-down surface coated with the adhesive so as to straddle the play space, and the upper surface of the pavement member is provided at a position higher than the road surface, and the adhesive is solidified. A pavement method for a road joint portion, characterized in that the upper surface of the pavement member is aligned with the road surface while a part of the adhesive is introduced into the through hole by pushing down the pavement member before.

The invention according to claim 2 is a pavement member dedicated to the road joint used in the paving method for the road joint, that is, the road surface at each of the road end portions facing each other across the gap of the road joint portion. A road joint that is constructed so as to be low and is installed over the step-down surface on which the adhesive is applied so as to straddle the play space, and is pressed down before the adhesive solidifies, so that the upper surface matches the road surface. Part dedicated pavement member, which is formed into a block shape using a binder composed mainly of rubber or rubber and bituminous material and aggregate, and is erected and pushed down on both of the step lowering surfaces. At this time, a part of the adhesive before solidification is provided with through holes in the up-down direction, which are introduced from below.

(Operation) In the pavement method of the road joint portion of claim 1, since the prefabricated pavement member is installed in the road joint portion to close the play space, the pavement material is used at the site of the road joint portion. There is no need to set.

Then, by pushing down the pavement member, the height of the pavement member can be adjusted to the road surface while introducing the adhesive before solidification of the step-down surface into the through hole of the pavement member. There is no need to use a special setter to match the road surface. In addition, the adhesive introduced into the through-hole increases the bonding force between the pavement member and the road end, and the pavement member can be securely fixed to the road end without using anchors, bolts, or support members. You can

Further, when the pavement member is covered on the adhesive on the step-down surface, air may be present under the pavement member,
When the pavement member is pushed down, the air easily escapes from the through hole. That is, the air under the pavement member hinders the adhesion between the pavement member and the road end portion, and particularly when the temperature is high such as in summer, the air expands to reduce the adhesive force. Since the air can be vented by the holes, it is more advantageous in increasing the bonding force between the pavement member and the road end.

Next, since the pavement member dedicated to the road joint portion of the second aspect of the present invention has through holes in the vertical direction for introducing the adhesive from below, the pavement method of the first aspect of the present invention can be achieved. It can be carried out.

Thus, the rubber contained in the pavement member acts as a binder for bituminous materials and aggregates to enhance the shape retention of the pavement member, and due to its elasticity, the elasticity and toughness of the pavement member. Or to increase flexibility. Further, the high shape retention of the pavement member means that the pavement member can be transported and installed at the road joint without being deformed without using a supporting member.

Further, since the pavement member has a rubber content, it has good adhesiveness to the road end portion by an adhesive that is a member of the same resin, and moreover, it is easily elastically deformed in response to expansion and contraction or vertical displacement of the road. In terms of
It is fixed by an anchor or the like, and thus a support member is unnecessary.

That is, in the present invention, not only to improve the performance of the pavement material than rubber, but by utilizing the properties of rubber, without using a support member or anchor,
The pavement member can be reliably fixed to the road edge with an adhesive, and therefore it is not necessary to include a support member or a coupling means different from the pavement material in the pavement member. The whole can be used for expansion and contraction of roads and absorption of vertical displacement of girders.

Furthermore, since the above pavement members can be manufactured in a factory, there is no problem of the outside temperature affecting binders and aggregates, and it is possible to perform on-site construction with stable quality, and of course the slope of the road. It doesn't matter.

(Effect of the invention) Therefore, according to the invention according to the first aspect of the invention, it is not necessary to cast the pavement material on-site, and the height of the pavement member is set on the road surface without using a special setter. In addition, the pavement member can be reliably fixed to the road joint without using anchors, bolts, or support members, and construction is easy and a blind joint can be easily obtained. The effect is obtained.

Further, according to the invention according to claim 2, the invention according to claim 1 can be implemented, and the entire pavement member can be effectively used and the elasticity of the rubber can be improved. By effectively utilizing it, it becomes possible to smoothly absorb the expansion and contraction of roads and the vertical displacement of girder ends, and the durability as a blind joint can be improved.

(Example) Hereinafter, the Example of this invention is described based on drawing.

FIG. 1 shows a pavement member 1 installed at a joint portion of a road bridge. This pavement member 1 is formed in a block shape (plate shape) with substantially the same thickness as the bridge surface pavement 3 on the floor slab 2 shown in FIG. It is provided with a plurality of vertical through-holes 1a opened on the bonding surface to the section. In the case of this example, the pavement member 1 is a main body in which an aggregate is mixed with a hot-melt type binder obtained by mixing rubber and bituminous materials as main materials, and sand and other additive materials. The load receiving means 5 is embedded in the position 4.

In this case, the binder can be formed by adding the same amount of rubber and bituminous material or increasing the amount of bituminous material, and sand should be mixed in an appropriate amount in order to impart abrasion resistance to the paving member 1. You can Also, the aggregate may be at least more than the binder.

As rubber, natural rubber, styrene-isoprene rubber,
Styrene / butadiene rubber, butadiene rubber, isoprene rubber, chloroprene rubber and the like can be used.
Furthermore, ethylene-vinyl acetate copolymer resin, polyethylene, ethylene-ethyl acrylate copolymer resin, polyamide, polyisobutylene, etc. can be added to the binder.

The binder of the paving member 1 of this example is mainly composed of rubber and bituminous material. However, only the rubber is used as a main material without using the bituminous material, and sand and other additives are added thereto. Good.

The load receiving means 5 is located in the central portion of the main body 4 in the bridge length direction so as to be able to straddle the play space 6 when the paving member 1 is installed at the road joint, and in the case of this example, the steel plate 5a receives the load. It is like this. And the bottom surface of the steel plate 5a is the main body 4
It is embedded so as to be flush with the lower surface of and is locked to the main body 4 by a locking member 5b protruding upward. The locking member 5b is a steel plate
A plurality of 5a are fixed at intervals in the longitudinal direction.

When manufacturing the paving member 1, the load receiving means 5 is placed on the bottom of the mold following the outer shape of the paving member 1, and the core forming the through hole 1a is fixed. Then, the binder that has been heated and melted and the aggregate that has been heated are kneaded in this mold by a kneader and poured, and the surface is leveled by rolling and the mold is released to obtain the paving member 1.

In the construction, first, the pavement member 1 is used for the bridge surface pavement 3 which is continuously applied over the floor slabs 2 and 2 across the play space 6.
The reference line is drawn in the longitudinal direction of the road joint (marking) with the same interval as the width (dimension in the bridge length direction) and the clearance 6 located at the center of the interval. Then, on each reference line, a cut is made in the bridge surface pavement 3 with a concrete cutter, and the pavement portion between both cuts is scraped and removed. Next, chipping (surface smoothing) is performed on the upper surface of the exposed floor slabs 2, 2 so that the depth from the road surface is slightly deeper than the thickness of the pavement member 1 (for example, about 5 mm deep) as shown in FIG. Form the lowered step portions 7,7. In this case, the side surfaces 7a, 7a of the step-down portions 7,7 are configured by the side surfaces (cut surfaces) of the cut by the concrete cutter, but since the cut itself has a width, both sides of the step-down portions 7,7 are formed. The dimension between the surfaces 7a, 7a is slightly larger than the width of the pavement member (for example, about 10 mm larger).

Then, as shown in FIG. 3, the clearance 6 is filled with a backup material 8 made of urethane foam or the like. Then, the side surfaces 7a, 7a and the bottom surface of the step-down portion 7, 7, that is, the step-down surfaces 7b, 7b
Is heated by a burner, and the side surfaces 7a, 7a and step-down surfaces 7b, 7b are
A hot-melt type adhesive 10 which is heated and melted is applied to a thickness of about 5 mm, and the adhesive 10 is filled on the backup material 8 to form a water stopping means 11 for the play 6. The binder used in the paving member 1 is used as the adhesive 10.

On the other hand, in parallel with the work of applying and filling the adhesive 10, the work of heating and melting both side surfaces and the bottom surface of the pavement member 1 with a burner is performed. The solvent may be applied and the heating may be replaced. Then, the pavement member 1 is inserted into the step-down portions 7, 7 to which the adhesive 10 is applied, and the surface of the pavement member 1 matches the surface of the bridge surface pavement 3, 3 before the adhesive 10 is solidified. Push down. At this time, as shown in FIG. 4, the excess adhesive 10 enters the through hole 1a of the pavement member 1 and the air under the pavement member 1 escapes into the through hole 1a. As a result, the pavement member 1 is bridged to the road ends on both sides of the pavement member 6 across the play space 6, and a blind joint connected to the bridge surface pavements 3 is obtained.

Therefore, according to the present embodiment, it is possible to obtain a blind joint without giving a pavement material to the road joint at the construction site. Then, the through hole 1a of the pavement member 1
With the introduction of the adhesive 10 to the pavement member 1, the height of the pavement member 1 can be easily adjusted to the road surface, and the adhesive agent 10 introduced into the through hole 1a enhances the bonding force between the pavement member 1 and the road end. Further, the air that hinders the adhesion between the pavement member 1 and the road end can be removed from between the two, which is advantageous in increasing the bonding force between the two. Then, paving member 1
Can effectively utilize the entire structure to absorb expansion and contraction of roads, etc., and will not cause early cracking.

Moreover, since the pavement member 1 includes the load receiving means 5,
It is not necessary to separately provide a load receiving plate on the play space 6 during construction,
Further, since the anchor is not required and the pavement rolling operation is unnecessary, the construction can be performed easily and quickly.

The through-hole 1a of the pavement member 1 has a void above the adhesive 10 introduced from below, but this void may be left as it is, or by filling the adhesive 10 from above. Good.

Another embodiment is shown in FIG. That is, the pavement member according to the present invention can be fixed to the road end without using an anchor, but the use of an anchor for reinforcement is not excluded. FIG. 5 shows an example in which such an anchor 12 is used, and the through hole 1a of the pavement member 1 is used for connection with the anchor 12. The anchor 12 in this case has a wedge at the lower end with a cut 13 that opens downward.
14 is fitted from below, and the step-down surface 7b of the step-down portion 7
By hammering into the anchor hole formed in the floor slab 2 and opening the cut 13 with the wedge 14 to widen the lower end portion to the outside,
It is fixed to the floor slab 2. The pavement member 1 positions the through hole 1a in the anchor 12, inserts it into the step-down portion 7 in the same manner as in the previous embodiment, and fills the through hole 1a with the adhesive (binder) 10 from above. .

Although the pavement member is molded to have substantially the same thickness as the pavement in the above embodiment, it may be thinner or thicker than that. Especially when the thickness is increased, the crack resistance against expansion and contraction of roads and vertical displacement of girder ends is improved.

Further, as the adhesive, rubber content is more than that of the above binder,
Other compositions or other types of adhesives may be used, such as those with a large amount of tackifier and the like.

[Brief description of drawings]

The drawings show an embodiment of the present invention, FIG. 1 is a perspective view showing a pavement member dedicated to road joints, FIGS. 2 to 4 show each stage of construction, and FIG. 2 shows road joints. FIG. 3 is a partial cross-sectional perspective view showing a state in which a step-down portion is formed, FIG. 3 is a cross-sectional view showing a state in which an adhesive is applied to the step-down portion, and FIG. FIG. 5 is a sectional view showing a main part of another embodiment. 1 ... Pavement member, 1a ... Through hole, 2 ... Floor slab, 3 ... Bridge surface pavement, 4 ... Pavement member main body, 6 ... Free space, 7 ... Step down part, 7b ... Step down surface , 10 …… Adhesive.

Claims (2)

[Claims] 1. A step-lowering surface lower than the road surface is formed at each of opposite road ends sandwiching a play space of a road seam, and an adhesive is applied to both the step-lowering surfaces, and a rubber or rubber and A pavement member formed in a block shape using a binder mainly composed of bituminous material and an aggregate and having a through hole in the up-and-down direction is provided on the step-down surface on which the adhesive is applied, with the play space provided. A part of the adhesive is introduced into the through hole by straddling it and providing the upper surface of the pavement member at a position higher than the road surface, and pressing down the pavement member before the adhesive solidifies. However, a pavement method for a road joint, wherein the upper surface of the pavement member is aligned with the road surface. 2. The road joint is laid across each of the opposite ends of the road so as to be lower than the road surface. , A pavement member exclusively for road joints whose upper surface is fitted to the road surface by being pushed down before the adhesive solidifies, and a binder and an aggregate which are mainly composed of rubber or rubber and a bituminous material. It is molded into a block shape using, and has a through hole in the up-and-down direction through which a part of the adhesive before solidification is introduced from below when it is erected on both of the step-down surfaces and pushed down. A pavement member for road joints that is characterized by being