JP5779404B2 - Telescopic device for installation within the pavement height - Google Patents

Description

The present invention relates to, for example, a road bridge structure in a river, a canyon, an elevated road, various roads, and the like, and relates to a telescopic device for installation within a pavement height.

Conventionally, as a first example of a telescopic device in this type of technology, there is a technology disclosed in Japanese Patent Application Laid-Open No. 2011-12500 shown in FIG.
If it demonstrates about this, the expansion-contraction joint 1 for bridges is provided with joint member 3A, 3A, the guide plate 4, the anchor bar 5, the rubber-made water leakage prevention member 6 grade | etc.,. The joint members 3A and 3A are composed of face plates 2 and 2 and vertical plate plates 3 and 3. The face plates 2 and 2 cover the upper surface of the idler portion 7 and the face plate 2 and the vertical plate 3 are continuously formed. Has been. A plurality of anchor bars 5, 5... Are attached to the vertical plate 3, 3 at predetermined intervals, and are laid on the floor slabs 8, 8. Reinforcing bars are erected on the upper and lower portions of the anchor bars 5, 5,..., And the anchor bars 5, 5,. The pair of joint members 3A and 3A are arranged on the floor slabs 8 and 8 so that the face plates 2 and 2 are abutted with each other. , And allows the vehicle to pass while absorbing the expansion and contraction of the floor slabs 8 and 8 by the gaps in the play section 7. Pavement material is placed on the top of the floor slabs 8 and a roadway is formed on the bridge. A plurality of guide plates 4, 4... Having a substantially trapezoidal shape when viewed from the side are alternately attached to the joint members 3A and 3A, and anchor bars 5, 5,. .. Guides the snow plow of the snowplow, thereby preventing the snow plow from contacting the face plate 2 and avoiding damage thereof. As shown in FIG. 9, a rubber water leakage prevention member 6 made of vulcanized rubber is attached between the vertical plate plates 3 and 3 below the face plates 2 and 2 across the width direction of the road. It has been. Vulcanization is to improve the elasticity and strength of rubber using a crosslinking reaction by adding sulfur or the like under a certain pressure while heating raw rubber. Screw holes 9a, 9a,... And mounting holes 6b, 6b are drilled in the side surfaces 6a, 6a of the water leakage prevention member 6, and these screw holes 9a, mounting holes 6b is used to penetrate the flat screw 9, and the flat screw 9 is screwed into the nut 9b while the side surface portion 6a of the water leakage preventing member 6 is interposed between the fixing rectangular plates 10 and 10. The side portions 6a and 6a of the water leakage preventing member 6 are sandwiched and fixed from the left and right.

Conventionally, as a second example of the telescopic device in this type of technology, there is a technology disclosed in Japanese Patent No. 3593644 shown in FIG.
Explaining this, the comb-shaped one-side finger portion 11A and the other-side finger portion 11B are arranged to face each other across a gap 13 such as a bridge girder 12 and 12 to support the wheel load of the traveling vehicle and change in temperature. Absorbs expansion and contraction in the bridge axis (runway) direction X due to the above. It arrange | positions in the gap 13 between the bridge girder 12 supported by the bridge pier (not shown) via the seismic isolation apparatus (not shown).
The one-side finger portion 11A has a deformable portion 11a on the base side and a rigid portion 11b on the tip side, and the deformable portion 11a is relative to the bridge axis perpendicular (transverse) direction Y by rubber 11c as an elastic member. It is possible to follow the displacement. A rubber 11c is filled and embedded between the cylindrical frame portion 14 on the outer periphery of the deformable portion 11a on the base side of the one-side finger portion 11A and the center pin 15, and the one-side finger portion 11A is subjected to relative displacement. The rubber 11c is rotated and deformed by rotating in the circumferential direction so that the rubber 11c is twisted. Further, due to the elastic action of the rubber 11c, when the earthquake or the like is settled and the displacement is converged, the original state is restored and returned. The one-side finger portion 11A opposed across the clearance 13 can be rotated in the circumferential direction upon relative displacement in the direction Y perpendicular to the bridge axis (transverse). The other side finger portion 11B is integrally formed with the base portion 16 and is not deformed, but the fixed other side finger portion 11B is relatively displaced to rotate the opposed one side finger portion 11A. A load support member 17 is disposed below the rotatable one side finger portion 11A. The rotatable one-side finger portion 11A is supported by a load support member 17 against a wheel load.

Japanese Patent Laid-Open No. 2011-12500 Japanese Patent No. 3593644

Since the conventional technology has the above-described configuration, there are the following problems. That is, according to the first example, the bridge expansion joint 1 includes the joint members 3A and 3A, the guide plate 4, the anchor bar 5, the rubber leakage prevention member 6 and the like. and lead to aging by long-term use of not only water leakage phenomenon Joint Gap section 7該漏water preventing member 6 is broken, or cracks to is caused, the faceplate 2 wheel load borrowed or the anchor bar 5,5, There is a problem that the anchor bars 5 and 5 are cut from the 2 and the vertical plate 3 and 3. In addition, there has also been a bottleneck in which the flat screw 9 is loosened due to long-term use, and the side surfaces 6a, 6a of the water leakage preventing member 6 are detached from the face plates 2, 2. Furthermore, in the first example, there are problems that the number of component parts is large, complicated and large, and does not fall within the pavement height, the unit price of the product is expensive, the number of on-site production steps increases, and traffic regulations are prolonged. Were present.

Next, according to the second example, the comb-shaped one-side finger portion 11A and the other-side finger portion 11B are disposed to face each other across the gap 13 such as the bridge beams 12 and 12, and the one-side finger portion 11A The base 11 has a deformable portion 11a on the base side and a rigid portion 11b on the distal end side, and the deformable portion 11a can follow the relative displacement in the direction Y perpendicular to the bridge axis (transverse) direction by a rubber 11c as an elastic member. Due to long-term use, the deformable portion 11a on the base side, in particular, the rubber 11c and the pin 15 deteriorates due to fatigue, and the one-side finger portion 11A breaks or drops off from the base portion 16. In addition, there is a bottleneck in which the wheel load of the traveling vehicle is directly applied to the load support member 17 above the gap 13 from the finger portions 11A and 11B, and the load support member 17 is cracked. Therefore, in the second example, in addition to the vulnerability of the one-side finger portion 11A, the number of component parts is large, and there is a problem that it is complicated and large in size and lacks practicality.

The present invention is a comb-shaped load bearing member configured of a predetermined length to form a concave surface convex on its upper surface with a substantially T-shaped cross section of the one and the other of the telescopic device, perpendicular to the outward side of the comb-shaped load bearing member A telescopic device made of a substantially fishhook-like rib plate, which is fixed and fixed at a predetermined interval in the length direction of the comb-shaped load supporting member, is preferably installed within the pavement height, and the telescopic device is replaced. In order to prevent cracking phenomenon of the floor slab without damaging the embedded reinforcement of the floor slab, that is, ST anchor bolts and precast concrete girders, the number of parts is extremely reduced and durable. In order to provide a telescopic device for installation within a pavement height that is highly producible and mass-productive, it consists of the following construction and means.

According to the invention described in claim 1, whereas, the other at the expansion device for placement paving in height comprising a combination, arrangement of one and the other of the telescopic device is a substantially T-shaped cross section , becomes in the top surface portion and the leg portion, and a predetermined length of the comb-shaped load bearing member formed with concave surface convex to the upper surface portion, outward side surfaces located at the convex surface of the one and the other comb-shaped load bearing member A plurality of fixed and orthogonal comb-shaped load supporting members are fixed at a predetermined interval in the length direction, and are extended by forming an arc-shaped surface from the upper bar-shaped part and the lower surface of the bar-shaped part. A substantially fishhook-like rib plate composed of a lower foot that exists, and an elastic sealing material member and a backup member interposed and laminated between the leg portions of the one and the other comb-shaped load supporting members. It is characterized by.

According to the invention described in claim 2, whereas - the other at the expansion device for placement paving in height comprising a combination, arrangement of one and the other of the telescopic device is a substantially T-shaped cross section , becomes in the top surface portion and the leg portion, and an outer side located at the convex surface of a predetermined length of the comb-shaped load bearing member formed with concave surface convex to the upper surface portion, said one and the other comb-shaped load bearing member A plurality of fixed load supporting members that are orthogonal to and fixed to the upper surface portion with a predetermined interval in the length direction of the one and the other comb-shaped load support members, and are arcuate from the upper bar-shaped portion and the lower surface of the rod-shaped portion. A substantially fishhook-shaped rib plate composed of a lower foot that forms a surface, and an elastic sealant member interposed and laminated between the legs of the one and the other comb-shaped load support members; A backup member, the rod-shaped portion of the substantially fishhook-shaped rib plate, and the First disposed on an upper surface of the foot, characterized by comprising in a second reinforcing rebar.

According to the invention described in claim 3, in the invention described in claim 1 or 2, it is characterized in that it is gently inclined downward toward the tip of the rod-shaped portion of the substantially fishhook-shaped rib plate.

Since the expansion / contraction apparatus for installing in the pavement height according to the present invention has the above-described configuration and operation, the following effects can be obtained.

According to the invention described in claim 1, whereas, the other at the expansion device for placement paving in height comprising a combination, arrangement of one and the other of the telescopic device is a substantially T-shaped cross section , becomes in the top surface portion and the leg portion, and a predetermined length of the comb-shaped load bearing member formed with concave surface convex to the upper surface portion, outward side surfaces located at the convex surface of the one and the other comb-shaped load bearing member A plurality of fixed and orthogonal comb-shaped load supporting members are fixed at a predetermined interval in the length direction, and are extended by forming an arc-shaped surface from the upper bar-shaped part and the lower surface of the bar-shaped part. A substantially fishhook-like rib plate composed of a lower foot that exists, and an elastic sealing material member and a backup member interposed and laminated between the leg portions of the one and the other comb-shaped load supporting members. Providing a telescopic device for installation between pavements characterized by
Since it has such a configuration, the installation of the expansion / contraction device within the pavement height can reduce the risk of damaging the other floor slab or the reinforcing steel bars of the floor slab, so it is suitable for application to PC floor slabs. In addition, the other slab has the effect of shortening the suspension time and keeping the traffic regulation time short and reducing the noise caused by the suspension work. And there is an effect that the industrial waste generated by the fishing work can be greatly reduced. Further, since the comb-shaped load support member is provided with a substantially fishhook-shaped rib plate, the height of the expansion / contraction device can be suppressed, and the expansion / contraction device can be applied within the height of the pavement. Further, when the wheel load acts on the expansion / contraction device, the first and second reinforcing bars resist the reversal force against the reversal force of the expansion / contraction device on the road surface side, that is, the upper portion of the rod portion of the substantially fishhook-like rib plate. Then, there is an effect that the expansion and contraction device is stably fixed within the pavement height without falling down. In particular, since the substantially fish-shaped rib plate is orthogonally fixed to the outer side surface located on the convex surface of the one and the other comb-shaped load support members, the wheel load applied to the expansion device is diffused and the durability of the expansion device is enhanced. There is an effect. Furthermore, the substantially fishhook-shaped rib plate is provided with an upper bar-shaped part and a lower hook extending from the lower surface of the bar-shaped part so as to form an arc-shaped surface, so that it can be stably disposed within the pavement height. In addition, the substantially fishhook-shaped rib plate itself can be formed thin while securing the strength of the substantially fishhook-shaped rib plate itself. In addition, since the elastic sealing material member and the backup member that are interposed and laminated between the leg portions of the comb-shaped load supporting member are provided, there is an effect that the sealing performance in the gap S is improved.

According to the invention described in claim 2, whereas - the other at the expansion device for placement paving in height comprising a combination, arrangement of one and the other of the telescopic device is a substantially T-shaped cross section , becomes in the top surface portion and the leg portion, and an outer side located at the convex surface of a predetermined length of the comb-shaped load bearing member formed with concave surface convex to the upper surface portion, said one and the other comb-shaped load bearing member A plurality of fixed load supporting members that are orthogonal to and fixed to the upper surface portion with a predetermined interval in the length direction of the one and the other comb-shaped load support members, and are arcuate from the upper bar-shaped portion and the lower surface of the rod-shaped portion. A substantially fishhook-shaped rib plate composed of a lower foot that forms a surface, and an elastic sealant member interposed and laminated between the legs of the one and the other comb-shaped load support members; A backup member, the rod-shaped portion of the substantially fishhook-shaped rib plate, and the Providing extension device for placement between pavement to the first, characterized in that in a second reinforcing rebar disposed on an upper surface of the foot.
Since such a configuration is adopted, the upper surface portion of the one comb-shaped load supporting member is welded and fixed to the upper end of the other substantially fish-shaped rib plate, so that the other substantially fish-shaped rib plate There is an effect that the concentration of the wheel load, that is, the stress concentration in the joining region and the welded / fixed portion is reduced to about 60% as compared with the case fixed from the lower surface position. In particular, since the substantially fish-shaped rib plate is orthogonally fixed to the outer side surface located on the convex surface of the one and the other comb-shaped load support members, the wheel load applied to the expansion device is diffused and the durability of the expansion device is enhanced. There is an effect. Furthermore, the substantially fishhook-shaped rib plate is provided with an upper bar-shaped part and a lower hook extending from the lower surface of the bar-shaped part so as to form an arc-shaped surface, so that it can be stably disposed within the pavement height. In addition, there is an effect that the substantially fishhook-like rib plate itself can be formed thin while securing the strength of the substantially fishhook-like rib plate. In addition, since the elastic sealing material member and the backup member that are interposed and laminated between the leg portions of the comb-shaped load supporting member are provided, there is an effect that the sealing performance in the gap S is improved. Furthermore, there is an effect that the first and second reinforcing bars can be arranged completely within the pavement height.

According to a third aspect of the present invention, it is installed within the pavement height according to the first or second aspect, wherein the substantially fishhook-like rib plate is gently inclined downward toward the tip of the rod-shaped portion. A telescopic device is provided.
Since such a configuration is adopted, in addition to the effect of the first or second aspect, the tip of the other substantially hook-like rib plate is gently arranged on the oblique lower side, that is, the inclination angle θ toward the pavement side. By ensuring the vertical space of the other substantially fish-shaped rib plate on the other side, there is an effect that the backfilling member, that is, the surrounding of the concrete is made good and the expansion and contraction device and the other, the other substantially fish-shaped rib plate are prevented from falling. On the other hand, by arranging the first and second reinforcing bars on the upper side of the other substantially fishhook-like rib plate, there is an effect of preventing the back-filling member from being cracked.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a vertical sectional view showing an embodiment of an expansion / contraction device for installation in a pavement height according to the present invention and showing a state in which the expansion / contraction device is installed in a pavement height. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view showing an expansion / contraction device according to an embodiment of an expansion / contraction device for installation in a pavement height according to the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a telescopic device for installing in a pavement height according to the present invention, with a part of the telescopic device cut. It is sectional drawing seen from the arrow AA line direction of FIG. 1 shows an embodiment of an expansion / contraction device for installation in the pavement height according to the present invention, and a joining region M ₁ when a wheel load P by the expansion / contraction device acts on the upper surface portion of the comb-shaped load support member. it is a perspective view showing a mowing stress state or a. FIG. 3 is a vertical sectional view showing a comb-shaped load support member and a substantially fishhook-like rib plate orthogonal to and fixed to the comb-shaped load support member in the embodiment of the expansion and contraction device for installation in the pavement height according to the present invention. The Example of the expansion-contraction apparatus for installing in the pavement height which concerns on this invention is shown, Comprising: It is the perspective view which cut | disconnected a part of expansion-contraction apparatus. There is shown an embodiment of a telescopic device for placement paving in height according to the present invention, the bonding area M ₂ when wheel load P caused by expansion and contraction device is applied to the upper surface portion of the comb-shaped load bearing member it is a perspective view showing how hunt stress state. It is a vertical sectional view showing a first example in the prior art. It is a perspective view which shows the 2nd example in a prior art, and was partially stepped vertically.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a telescopic device for installation within a pavement height according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 to FIG. 5 are examples showing an embodiment of a telescopic device for installing in the pavement height according to the present invention, and FIG. 1 shows a state in which the telescopic device is installed in the pavement height. FIG. 2 is a plan view showing a telescopic device according to the present invention, and FIG. 3 is a perspective view of the telescopic device according to the present invention, with a part cut away. 4 is a cross-sectional view seen from the direction of the arrow AA in FIG.

A is an example of a telescopic device according to the present invention. As is apparent from FIGS. 1 to 3, the expansion device A is configured by combining one expansion device 18 and the other expansion device 19. One telescopic device 18 and the other telescopic device 19 have the same configuration, and are installed within the pavement height as shown in FIG. 1, specifically, one pavement 22 stacked on one floor slab 20. And the other pavement 23 laminated on the other floor slab 21.

The configuration of one of the telescopic device 18, and one of the comb-shaped load bearing member 18A of a predetermined length to form a concave surface convex on its upper surface with a substantially T-shaped cross section, outside one of the comb-shaped load bearing member 18A the One substantially fish-shaped rib plate 18B which is orthogonally fixed to the side surface and fixed at a predetermined interval in the length direction of one comb-shaped load support member 18A.
Outside of the other configuration of the expansion device 19, and the other comb-shaped load bearing member 19A of a predetermined length to form a concave surface convex on its upper surface with a substantially T-shaped cross section, said other comb-shaped load bearing member 19A The other substantially hook-shaped rib plate 19B is orthogonally fixed to the side surface and fixed to the other comb-shaped load supporting member 19A with a predetermined interval in the length direction. Wherein while the other telescopic devices 18 and 19 one on the order of a predetermined length _{L 1} for example 1.8 (m) as shown in FIG. 2 which is made for example of steel, other comb-shaped load bearing member 18A, and 19A, On the other hand, the other comb-shaped load supporting members 18A and 19A are formed with the other substantially fish-shaped rib plates 18B and 19B, which are orthogonal and fixed to the outer side surfaces 18a and 19a of the other comb-shaped load supporting members 18A and 19A. The one and the other comb-shaped load supporting members 18A and 19A have an upper surface portion 18b and 19b having a thickness of, for example, about 10 (mm), and about 50 (mm) formed depending on the bottom surface or the lower surface of the upper surface portions 18b and 19b. And a leg portion 18c having a length of.

The upper surface portions 18b and 19b have concave surfaces 18d and 19d and convex surfaces 18e and 19e connected to the concave surfaces 18d and 19d alternately formed in a series in the length direction on one outer edge thereof. The one concave surface 18d has a finger clearance D on the other convex surface 19e, and the other comb-shaped load supporting members 18A, 19A are arranged and fixed. On the other hand, as described above, the other of the telescopic device 18, 19 in FIG. 2 at the front end and rear end in order but are fabricated in a predetermined length L ₁ in the factory or the like in the field of connecting them in accordance with the width width length of the road The substantially rectangular connection plate 30 shown is fixed. Then, the substantially rectangular connecting plate 30... Is fixed with bolts and nuts.

Wherein while the other substantially hook-shaped rib plates 18B, 19B is on the other hand, as shown in FIG. 3, has the other comb-shaped load bearing member 18A, the predetermined distance _{L 2} eg 0.99 (mm) degree in the longitudinal direction of the 19A Then, the other comb-shaped load supporting members 18A, 19A are orthogonally fixed to the outer side surfaces 18a, 19a of the leg portions 18c, 19c. The one and the other substantially fishhook-like rib plates 18B and 19B extend in a direction perpendicular to the length direction of the one and the other comb-shaped load supporting members 18A and 19A and are integrally formed from the base end portions 18g and 19g. It has rod-like portions 18f and 19f formed in a substantially rectangular shape or a substantially circular shape in cross section.

The one shown in FIG. 3 has a substantially rectangular cross section. As shown in FIG. 4, the base end portions 18g and 19g have step portions 18h (19h) on one side, that is, the end surfaces fixed to the comb-shaped load supporting members 18A and 19A, and the other side, that is, the comb-shaped load supporting members. An arcuate surface 18i (19i) is formed on the end surface opposite to the side fixed to the members 18A and 19A. The arc-shaped surface 18i (19i) extends upward to be integrated with the lower surfaces of the rod-shaped portions 18f and 19f, and extends downward to be integrated with the upper surface of the foot 18j (19j). Here, the rod-like portions 18f and 19f have a structure having an inclination angle θ, for example, about 10 to 30 degrees, which is gently inclined downward toward the tip. The height H of the comb-shaped load supporting members 18A and 19A is substantially the same as the pavement height, and is approximately 70 (mm) and substantially the same as the height of the base end portions 18g and 19g.

Here, in the telescopic device for installation within the pavement height according to the present invention, the one and the other substantially fishhook-like rib plates 18B and (19B) are connected to the one and the other comb-shaped load supporting members 18A and 19A. When orthogonally fixed to the outer side surfaces 18a and 19a, the one and the other substantially hook-like rib plates are flush with the upper surface of the upper surface portion 18b (19b) of the one and the other comb-shaped load supporting members 18A and 19A. The upper ends of the base end portions 18g (19g) of 18B and (19B) are joined by means such as welding. According to finite element analysis according to this structure as stress due to the wheel load P junction region M ₁ portions indicated by circular line, as shown in FIG. 5 has a value of approximately 72.1 (N / mm ^2), the one , wheel load P take some to the other telescopic devices 18 and 19 was relatively low values diffuse distribution. This value has an advantage that the load is distributed to about 60% compared to the case of the embodiment. That is, it was found that the extension device for installing in the pavement height according to the present invention has high durability.

The one and the other comb-shaped load supporting members 18A and 19A and the one and the other substantially fishhook-shaped rib plates 18B and 19B are subjected to a rust-proof coating treatment with, for example, an inorganic zinc rich paint so that they can withstand long-term use. To. On the other hand, the upper surface portions 18b (19b) of the other comb-shaped load supporting members 18A and 19A are finished smoothly with a tool such as a grinder. Further, a finger seal primer for adhering the elastic sealant 28 described later is applied after the specified curing time of the inorganic zinc rich paint has elapsed.

Next, the construction procedure for installing the expansion / contraction device for installation in the pavement height according to the present invention in the pavement height will be described.
First, the other telescopic devices 18 and 19 are manufactured at a factory other than the construction site, for example. Then, at the time of construction at the site, the other telescopic devices 18 and 19 are conveyed. Therefore, the excavating tool such as a cutter is used to suspend the other floor slabs 20 and 21 while removing the existing expansion joints. Next, the mold is inserted and installed in the gap S between the floor slabs 20 and 21.

At the site, as shown in FIG. 1, embedded reinforcing bars, that is, U-shaped anchor reinforcing bars 24, 24, etc. are provided, while the other floor slabs 20, 21 are constructed, while the other floor slabs 20, 21 are located between them. On the upper part of the lever, the other telescopic devices 18 and 19 are installed with finger gaps D. Here, the finger clearance D is set to about 10 to 40 (mm). Then, the level of the other pavement 22 and 23 is adjusted, and the first and second reinforcing bars 25 and 26 are arranged and welded to the U-shaped anchor bars 24 and 24. On the other hand, the other expansion and contraction devices 18 and 19 are installed in the first reinforcement on the upper surfaces of the rod-like portions 18f and 19f of the substantially fish-shaped rib plates 18B and 19B and the foot 18j (19j) of the base end portions 18g and 19g, respectively. It installs so that the reinforcing bar 25 and the 2nd reinforcement reinforcing bar 26 may be arrange | positioned. That is, the first and second reinforcing bars 25 and 26 are disposed on the arcuate surface 18i (19i) side, on the upper side of the rod-like portions 18f and 19f and on the road surface side.

Further, a backup member 27 and an elastic sealing material 28 laminated on the upper surface of the backup member 27 are interposed between the leg portions 18c and 19c of the one and the other comb-shaped load support members 18A and 19A. Finally, post-cast concrete, that is, a backfilling member 29 is placed between the one and the other pavements 22 and 23.

Here, the elastic sealant 28 uses a finger seal. Then, this finger seal is poured into the gap S or between the leg portion 18c of one comb-shaped load support member 18A and the leg portion 18c of the other comb-shaped load support member 19A, and the thickness thereof is determined by the leg portion. When it is set to about 10 (mm) from the lower end of 18c, the sealing performance is improved. The backup member 27 disposed in the lower stage of the elastic sealing material 28 is formed of, for example, flame retardant urethane foam.

Next, an embodiment of a telescopic device for installing within the pavement height according to the present invention will be described with reference to FIGS.

In the embodiment of the telescopic device for installation within the pavement height according to the present invention, the one (other) substantially fishhook-like rib plate 18C, (19C) is shown in FIG. When orthogonally fixed to the outer side surfaces 18a and 19a of the supporting members 18A and 19A, the upper and lower comb-shaped load supporting members 18A and 19A have a wall thickness t from the upper surface of the upper surface portion 18b (19b). Comb-shaped load support members 18A and 19A, which are suspended from the lower surface 18m (19m), are provided on the outer side surface 18a (19a) of the leg portion 18c of the one and the other (substantially) hooked rib plates 18C and 19C. The upper end 18n (19n) of the end 18g (19g) is joined by means such as welding as shown in FIG.

With this configuration, according to the finite element analysis, as shown in FIG. 8, the stress caused by the wheel load P in the joint region M ₂ indicated by a circular line shows a value of about 115 (N / mm ² ). wheel load P take some stretch apparatus 18 and 19 were slightly higher value compared to that shown in, but embodiments diffuse distribution. That is, according to the Example of the expansion-contraction apparatus for installing in the pavement height which concerns on this invention, it turned out that durability is high like what is shown in embodiment.
In the embodiment of the telescopic device for installation within the pavement height according to the present invention, the other configurations, functions, construction procedures, etc. are substantially the same as those of the embodiment, and the same reference numerals are attached. The description is omitted.

The telescopic device for installation within the pavement height according to the present invention is applicable to, for example, the repair work of road bridge structures and can be used for various civil engineering and building structures such as rivers, canyons, elevated roads and various roads. It is.

18 One telescopic device 18A One comb-shaped load support member 18a Outer side surface 18B of one comb-shaped load support member One substantially fish-shaped rib plate 18C One substantially fish-shaped rib plate 18b Upper surface portion 18c Leg portion 18d Concave surface 18e Convex surface 18f Bar-shaped portion 18g Base end portion 18h Stepped portion 18k Upper end 18i Arc-shaped surface 18j Foot 18m Lower surface 18n Upper end 19 The other telescopic device 19A The other comb-shaped load support member 19a The outer side surface 19B of the comb-shaped load support member The other substantially fishhook Rib plate 19b Upper surface portion 19C The other substantially fishhook-shaped rib plate 19c Leg portion 19d Concave surface 19e Convex surface 19f Bar-shaped portion 19g Base end portion 19h Stepped portion 19i Arc-shaped surface 19j Upper foot 19k Upper surface 19m Lower surface 19n Upper end 20 One floor slab 21 The other floor slab 22 One pavement
23 The other pavement 24 U-shaped anchor reinforcing bar 25 First reinforcing reinforcing bar
26 Second reinforcing bar 27 Backup member 28 Elastic sealant 29 Backfill member (post-cast concrete)
30 Substantially rectangular connection plate

Claims (3)

In the expansion / contraction device for installing within the pavement height composed of one or the other, the configuration of the one and the other expansion / contraction device is substantially T-shaped in cross section, and is composed of an upper surface portion and a leg portion, a predetermined length of the comb-shaped load bearing member formed with concave surface convex to the upper surface, one and the other of the comb with outwardly to be perpendicular to the side and fixed, located on the convex surface of the one and the other comb-shaped load bearing member A plurality of fixed load supporting members having a predetermined interval in the length direction of the shape load supporting member, and an upper bar-shaped part and a lower foot extending from the lower surface of the bar-shaped part to form an arc-shaped surface. It is installed in a pavement height characterized by comprising a substantially fishhook-shaped rib plate, and an elastic sealing material member and a backup member interposed and laminated between the leg portions of the one and the other comb-shaped load supporting members. Telescopic device for. In the expansion / contraction device for installing within the pavement height composed of one or the other, the configuration of the one and the other expansion / contraction device is substantially T-shaped in cross section, and is composed of an upper surface portion and a leg portion, a predetermined length of the comb-shaped load bearing member formed with concave surface convex to the upper surface, perpendicular to and fixed to flush outwardly side and top portions positioned in said convex surface of said one and the other comb-shaped load bearing member In addition, a plurality of lower and upper comb-shaped load supporting members are fixed at a predetermined interval in the length direction and extend in a circular arc shape from the upper bar-shaped part and the lower surface of the bar-shaped part. A substantially fishhook-shaped rib plate composed of feet, an elastic sealing material member and a backup member that are interposed and laminated between the leg portions of the one and the other comb-shaped load support members, and the substantially fishhook-shaped rib plate. 1st and 1st arranged on the upper surface of the rod-shaped part and the foot Elastic means for installing be in the reinforcing rebar paving height in which said. The telescopic device for installation within the pavement height according to claim 1 or 2, wherein the telescopic device is gently inclined downward toward the tip of the rod-like portion of the substantially fish-hook-like rib plate.

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