JPH0559203B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method of constructing a road joint expansion and contraction device.

(Prior art) As an expansion and contraction device built at the joint of a road bridge,
A pair of joint members each having a horizontal plate protruding toward the joint gap side at the upper end of the joint plates are placed facing each other in the bridge axis direction, and a post-casting material is cast on the back of the joint members, and a sealing member is installed between the vertical plates. There is a known device with an interposed (for example, see Japanese Utility Model Application Publication No. 134405/1983). The above-mentioned sealing member is manufactured by suspending both joint members using a hanging means from a lower step lower than the road surface formed at the road joint, positioning and fixing them, and then attaching the joint members over the entire length of the road joint. It can be constructed by pouring a liquid rubber material between the vertical plates. However, if problems such as peeling from the vertical plates and premature aging are taken into consideration, it is desirable to mechanically bond a seal plate made of vulcanized rubber to the vertical plates of both joint members.

However, in the above-mentioned joint member in which the horizontal plate protrudes toward the gap side of the joint, or in the case of a joint member in which the distance between the vertical plates is narrow, after both joint members are fixed to the road joint,
It is difficult to insert the seal plate between the vertical plates and connect them to the vertical plates. Particularly, in a joint member in which the horizontal plate has a tooth shape and the teeth are always in mesh with each other, there is substantially no gap for inserting a seal plate between the joint members on both sides. Therefore, the seal plate is joined to the vertical plate at a factory, etc., and both joint members and the seal plate are integrated.
It will be installed at the road joint, but in that case,
Normally, unit members consisting of a seal plate joined to a joint member of a predetermined length (1 to 2 m) are installed one after another at the road joint, and the seal plates of each unit member are partially overlapped and glued together. A method of connecting is used.

(Problem to be Solved by the Invention) However, even with the above-described method of connecting the seal plates of each unit member, the connection must be made between the narrow vertical plates, resulting in poor workability and reliability. It is difficult to make a proper connection. Therefore, the resulting expandable and retractable device also tends to leak water from the joints between the seal plates.

The present invention provides a method for constructing a road joint expansion and contraction device that solves this problem.

(Means for Solving the Problems) A method for constructing a road joint expansion/contraction device according to the present invention utilizes a hanging means for suspending and positioning the above-mentioned joint members from the lowered part of a road joint. Without the seal plate, the joint gaps corresponding to the temperature at the time of construction (in other words, the gaps wider than the regular joint gaps) are provided, and in this state, the seal plate is connected between the vertical plates of both joint members, and later It is characterized in that the distance between the pair of joint members is a regular joint clearance.

That is, the method for constructing a road joint expansion/contraction device according to the invention of claim 1 is to construct a set of joint members facing each other in the bridge axis direction at a lowered part lower than the road surface formed at a joint part of a road bridge. A plurality of sets are connected to a hanging means, and arranged in the longitudinal direction of the joint part and suspended, and placed at the joint part, and a post-casting material is cast on the back of both joint members of each set to form a road joint expansion/contraction device. In the construction method, both joint members of each set are arranged such that the distance in the bridge axis direction is wider than the joint gap corresponding to the temperature at the time of construction, and the joint members adjacent in the longitudinal direction of the joint are spaced apart in the bridge axis direction. are supported by the hanging means so that there is no positional shift, and both sides of the seal plate extending in the longitudinal direction of the joint part across each set are supported against the mutually opposing surfaces of both joint members of each set. After joining, both joint members of each set are positioned by the hanging means so that the distance between them corresponds to the joint clearance at the time of construction.

Further, the method for constructing a road joint expansion/contraction device according to the invention of claim 2 is such that a set of joint members are formed facing each other in the bridge axis direction at a lowered part lower than the road surface formed at a joint part of a road bridge. A plurality of sets are connected to a hanging means, and are arranged in the longitudinal direction of the joint part and hung to be arranged at the joint part, and a post-casting material is cast on the back of the joint member of each set to form a road joint expansion and contraction device. In this construction method, one joint member of each set is supported by a hanging means so that there is no displacement in the axial direction of the bridge, and one of the seal plates that extends in the longitudinal direction of the joint part straddles each set. After joining the side parts to one of the joint members, connect the other joint members of each set so that the distance in the bridge axis direction between both joint members of each set is wider than the joint clearance corresponding to the temperature at the time of construction. After connecting the other side of the seal plate to the other joint member of each set and suspending it by connecting it to the hanging means, the other joint member of each set is connected to the one joint member such that the distance between the other joint member and the one joint member is It is characterized by positioning using hanging means so that the joint clearance corresponds to the temperature at the time of construction.

(Function) In the construction method of claim 1, both joint members of each set are first connected to the hanging means at a gap wider than the regular joint gap, and then positioned at the regular joint gap. from,
By utilizing the above-mentioned wide spacing, with all the joint members suspended from the suspension means over the entire length of the road joint, the seal plate extending over the entire length of this joint can be attached to both joint members of each set. can be combined against.

In the construction method according to claim 2, since only one joint member of each set is initially supported on the lowered part, the seal plate is connected to this one joint member without the problem of interference with the other joint member. can be done.

(Effects of the Invention) Therefore, according to the construction method of claim 1, since the distance between the joint members of each set is set in two stages, wide and narrow, using the hanging means for positioning the joint members, each set of It becomes possible to firmly connect a sealing plate that spans over the joint members and continues in the longitudinal direction of the road joint to each set of joint members, thereby obtaining a road joint expansion and contraction device that is easy to install and has high water-stopping properties. be able to.

Further, according to the construction method of claim 2, since the seal plate can be easily connected to one of the joint members, the entire construction can be completed in a short time.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

In the joint portion of the road bridge shown in FIG. 1, 1 is a road joint expansion/contraction device, 2 is a deck slab, 3 is a gap between the deck slabs 2, 2, and 4 is a pavement.

In the road joint expansion/contraction device 1, 5 is a joint member, 6 is a seal plate, 7 is a holding plate, and 8 is a post-casting part. The joint member 5 has a horizontal plate 11 attached to the upper end of the vertical plate 10 extending in the longitudinal direction of the joint part.
It is formed in the shape of a letter, and the length of the joint part in the longitudinal direction is about 1 to 2 m. The horizontal plate 11 has corrugated edges 11a and 11b extending in the longitudinal direction of the joint on the floor slab gap 3 side and the opposite side thereof. Further, the joint member 5 is provided with an anchor 12 projecting toward its back. In this expansion/contraction device 1, the vertical plates 10, 10 of the two joint members 5, 5 are formed into a wave-shaped gap by the corrugated edges 11a, 11a of the horizontal plates 11, 11 that protrude toward the side of the respective floor slab gaps 3. A plurality of sets of joint members 5 are arranged in parallel in the longitudinal direction of the joint portion.

The seal plate 6 has a U-shaped cross section and extends continuously across the joint members 5 of each set in the longitudinal direction of the joint, with both sides of the seal plate 6 extending continuously across the joint members 5 of each set. Vertical plate 1 of joint members 5, 5
0 and 10, respectively, are connected by bolts via the presser plate 7.

The post-casting portion 8 is a road surface formed in advance by box punching (a construction method in which a formwork is placed at the joint and slab concrete is poured) at the ends of the slabs 2, 2 on both sides of the slab gap 3. A post-casting material such as concrete is cast at the back of each of the joint members 5 to the lower step portion 14, which is lower than the lower step portion 14, and the joint members 5 are fixed to the floor slab 2.

When constructing a road joint expansion/contraction device, first,
Beside the step-down portion 14, the two joint members 5, 5 are made to face each other with a wave-shaped gap, and are connected to a hanging means 15 made of angle steel material shown in FIG. 2 by means of a connecting means 16. This coupling means 16 is provided with a movable rod on the upper arm of the U-shaped frame so that it can be screwed up and down, and between the movable rod and the lower arm of the frame, the horizontal plate 11 of the joint member 5 and the hanging means are connected. 15 are sandwiched between them. In this case, the two joint members 5 are attached to the hanging means 15 so that the interval between their waveform gaps is wider than the joint gap (the expansion/contraction amount plus the margin amount) corresponding to the temperature at the time of construction. Join. In this case, it is more preferable to make the interval between the waveform gaps wider than the maximum joint gap in view of the seal plate installation work described later.Furthermore, in the case of the interlocking type joint members 5, 5 shown in the drawings, both sides Teeth of the horizontal plates 11, 11 (waveform edges 11a, 11
It is preferable that the distances a) are wide enough so that they do not overlap each other. Also, one set of joint members 5,
5 is suspended by two or more hanging means 15.

Next, the set of joint members 5 connected to the hanging means 15 is placed at the lowered part 14 of the joint part.
As a positional relationship that faces each other in the bridge axis direction, both ends of the hanging means 15 are connected to the pavements 4 on both sides of the step lowering part 14.
It is suspended by constructing it on top of. Similarly, over the entire longitudinal length of the joint, a plurality of sets of joint members 5 are arranged in the step-down portion 14 so that their edges are in contact with each other in the longitudinal direction of the joint and are adjacent to each other in the longitudinal direction of the joint. The objects are suspended by the hanging means 15 so that there is no positional shift in the bridge axis direction. In this case, one joint member 5 (the one on the left in FIG. 2) is positioned at the actual installation location in the lowered part 14, and the anchor 12 on the back is attached to the dowel installed in the lowered part 14. It is connected to the muscle via a thread extending in the longitudinal direction of the joint.

Next, a rubber seal plate 6 that extends continuously over the entire length of the joint is inserted between the vertical plates 10, 10 of the opposing joint members 5, 5 from the corrugated gap that is wider than the regular joint gap. Insert it into
One side of the seal plate 6 is sandwiched between the vertical plate 10 of one joint member 5 and the presser plate 7,
It is connected to the vertical plate 10 with bolts. And the third
As shown in the figure, the other side of the seal plate 6 is similarly connected to the vertical plate 10 of the other joint member 5 using the holding plate 7 and bolts.

Then, the connection between the hanging means 15 and the other joint member 5 of each set that is not positioned at the regular installation location of the joint part is loosened, and all of the other joint members 5 of each set are suspended. While being suspended by the lower means 15, move it toward one of the joint members 5 that has been positioned in advance, while making sure that there is no large displacement from each other, and as shown in FIG. All of the other joint members 5 are again coupled (fixed) to the hanging means 15 as joint gaps during construction. This operation is performed for all sets to complete the positioning of all joint members 5. And the anchor 12 of the other joint member 5
is connected to the dowel muscle of the lowered part 14.

Next, the connection between each joint member 5 and the hanging means 15 by the connecting means 16 is released, and the hanging means 1
5 and the connecting means 16 are removed, and a post-casting material such as concrete is poured into the step-down portion 14 at the back of each joint member 5 to complete the construction of the road joint expansion/contraction device 1.

Note that the joint member 5 that has been previously positioned at the proper installation location and coupled to the dowel bar may be uncoupled from the hanging means 15 at the time the joint is made.

Therefore, in the road joint expansion and contraction device 1,
Since the seal plate 6 is continuously provided across each set of joint members 5, the joint members 5
The problem of water leakage at the connections between the two is solved. In addition, in the above construction method, the joint members 5 of each set are first arranged by the hanging means 15 at intervals wider than the regular joint gaps, and then positioned at the intervals between the joint gaps, so the above-mentioned wide intervals are utilized. Thus, the seal plate 6 can be easily connected to both joint members 5 of each set.

FIG. 5 shows another example of the construction method.

That is, in the case of this example, with respect to the step lowering part 14, only one joint member 5 of each set is attached to the hanging means 1 so that there is no displacement in the bridge axis direction.
5 for hanging and positioning, and the other joint member 5 is laid down on the lowered part 14. Then, one side portion of the seal plate 6 is connected to the vertical plate 10 of each joint member 5 on one side using the holding plate 7 and bolts. Next, the other joint member 5
is connected and suspended so that there is no displacement in the bridge axis direction with respect to the suspension means 15, and in such a manner that the distance between it and the one joint member 5 (waveform clearance) is wider than the regular joint clearance. The other side of the seal plate 6 is connected to the vertical plate 10 of the other joint member 5 in the same manner. Thereafter, the setting of the joint clearance and the pouring of the post-cast material are carried out in the same manner as in the previous embodiment.

Therefore, in the case of this example, since only one joint member 5 of each set is initially positioned in the step-down portion 14, the seal plate 6 for this one joint member 5 can be positioned without any problem of interference with the other joint member 5. This makes it possible to connect them easily and quickly, making it possible to complete the entire construction in a short period of time.

In this example, first, only one joint member 5 is positioned at the proper installation location using the hanging means 15, and after this one joint member 5 is fixed to the dowel bar, the hanging means 15 is removed. Alternatively, one side of the seal plate 6 may be joined together, and then the other joint member 5 may be suspended by the hanging means 15 to join the other side of the seal plate 6 to the other joint member 5.

In addition, in the two embodiments related to the construction method described above, one joint member of each set was first positioned at the proper installation location, but such positioning was not performed at the stage of joining the seal plate, and it was later installed. The above positioning may be performed when setting the interval between both joint members to be a joint clearance. Furthermore, in this construction method, the joint member in the above embodiment has a horizontal plate, but in the case of a type of joint member without a horizontal plate, an angle member is temporarily attached to the upper end of the vertical plate, and this angle member and the above-mentioned joint member are temporarily attached. What is necessary is just to couple it with a hanging means by a coupling means.

In addition, the present invention can be applied to other road bridges such as PC (prestressed concrete) girder bridges and RC (reinforced concrete) girder bridges, in addition to steel bridges in which deck slabs are provided on steel girders as in the above embodiment. Of course it is possible.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and Fig. 1 is a perspective view of the road joint expansion and contraction device, Figs. 2 to 5 show each stage of the construction method, and Fig. 2 is a perspective view partially cut away. Figures 3 to 5 are cross-sectional views. 1... Road joint expansion and contraction device, 2... Floor slab, 3...
Floor slab play area, 4...paving, 5...joint member,
6... Seal plate, 7... Holding plate, 8... Post-beating part, 10... Vertical plate, 11... Horizontal plate, 13... Waveform play space, 14... Step lowering part, 15... Hanging means ,1
6...Connection means.

Claims (1)

[Scope of Claims] 1. A plurality of sets of joint members facing each other in the axial direction of the bridge are each connected to a hanging means at a stepped part lower than the road surface formed at a joint part of a road bridge, and the above-mentioned In a construction method in which a road joint expansion/contraction device is constructed by arranging the joint members in the longitudinal direction of the joint part and placing them at the joint part, and placing post-casting material on the backs of both joint members of each set, the both joint members of each set are suspended. The suspension means is arranged so that the spacing in the bridge axis direction is wider than the joint clearance corresponding to the temperature at the time of construction, and so that there is no positional shift in the bridge axis direction between joint members that are adjacent to each other in the longitudinal direction of the joint. , and after joining both ends of the seal plate extending in the longitudinal direction of the joint portion across each set to the mutually opposing surfaces of both joint members of each set,
A method for constructing a road joint expansion and contraction device, characterized in that both joint members of each set are positioned by a hanging means so that the distance between the joint members corresponds to the temperature at the time of construction. 2. A plurality of sets of joint members formed in a lower step than the road surface formed at a joint of a road bridge, facing each other in the bridge axis direction, are connected to a hanging means, respectively, and the joint members are connected in the longitudinal direction of the joint. In a construction method in which a road joint expansion/contraction device is constructed by hanging the joint members side by side and placing them at the joint, and placing post-casting material on the backs of both joint members of each set, one joint member of each set is connected to the bridge axis. After supporting the seal plate with a hanging means so that there is no misalignment in the direction, and joining one side of the seal plate extending in the longitudinal direction of the joint part across each set to the one joint member, The other joint member of each set is connected to the suspension means and suspended so that the distance between both joint members in the bridge axis direction is wider than the joint clearance corresponding to the temperature at the time of construction, and the other joint member of each set is suspended. After joining the other side of the seal plate to the joint member, suspending means is used to suspend the other joint member of each set so that the distance from the one joint member is a joint gap corresponding to the temperature at the time of construction. A method of constructing a road joint expansion/contraction device characterized by positioning by.