JP4941691B1 - Extension device joining method and extension device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a water stop performance at a joint portion of an expansion device by a simple method, suppress water leakage from the joint portion, and easily join adjacent expansion devices in the field work. A joining method and a telescopic device are provided.
A step of manufacturing a telescopic device 1 by arranging a backup member 6 between two plates 2, filling a reaction hardening type elastic body above the backup member 6 and molding a water stop member, and a flat plate The connecting member 4 is molded by filling a reaction-molded elastic body into a mold formed in a shape and the end surface of the expansion device 1 in the road bridge width direction y so as to cover at least a part of the water stop member 3 There are a step of attaching the connecting member 4 and a step of bonding and fixing another extension device so as to sandwich the connecting member 4 of the extension device 1.
[Selection] Figure 1

Description

  The present invention relates to a method for joining an extension device installed on a bridge such as a road and the extension device.

  In bridges and the like, telescopic devices (also called joints) are installed to absorb expansion caused by temperature changes. This telescopic device is laid in a direction perpendicular to the bridge axis.

  In FIG. 3, the outline of the conventional expansion-contraction apparatus 1X is shown. The telescopic device 1X includes two plates 2 arranged face to face, a water stop member 3X arranged between the two plates 2, and a backup member 6X arranged below the water stop member 3X. A plurality of the expansion devices 1X are connected and installed in a direction (hereinafter referred to as the road bridge width direction y) perpendicular to the longitudinal direction of the bridge (hereinafter referred to as the bridge axis direction x). Here, 20 is a road in which concrete and asphalt are placed, and 9 is a joint of a plurality of telescopic devices 1X. Z indicates the vertical direction.

  The expansion device 1X has a function of absorbing the expansion and contraction when the road 20 expands and contracts due to a temperature change. In addition, the expansion / contraction device 1X prevents the liquid leaking from rain or an automobile from dropping under the bridge by installing the water stop member 3X. Here, the arrow shown with the broken line has shown the mode that this liquid flows.

  In FIG. 4, sectional drawing of yz plane of the expansion-contraction apparatus 1X is shown. In the joint portion 9 of the telescopic device 1X, a gap is generated between the adjacent plate 2 and the water stop member 3X. An invention is disclosed in which water or the like is prevented from dropping from the gap between the water stop members 3X.

  As a first method of filling the gap of the water stop member 3X in the joint 9, a method of filling the joint 9 with an elastic sealing material having a reaction hardening property after installing the expansion / contraction device 1X at a site where a bridge or the like is constructed Is disclosed (for example, see Patent Document 1). With this configuration, the first method can obtain a high water stopping performance because the liquid elastic sealing material is poured into the gap generated in the joint portion 9.

  As a second method, there is disclosed a method in which a water stop member 3X having elasticity and protruding toward the joint portion 9 is employed and the protruding portions of the water stop member 3X are brought together (see, for example, Patent Document 2). . The water-stopping performance is improved by a configuration in which the protruding portion of the water-stopping member 3X is brought into a pressure-bonded state with a screw or the like that connects the extension devices 1X. In addition, the protrusion part of the water stop member 3X is made into a sufficient size so that when the expansion / contraction device 1X is expanded (extends in the bridge axis direction x), a thin gap is not generated.

  As a third method, there is disclosed a method in which an elastic water-stopping member 3X is employed and the adjacent water-stopping member 3X is bonded with an adhesive at the joint 9 (see, for example, Patent Document 3). With this configuration, it is possible to improve the water stop performance by closing the gap between the water stop members 3X at the joint 9 at a low cost.

  As a fourth method, a method is disclosed in which the water-stopping members 3X on both sides are formed in a concave shape and a convex shape in the joint portion 9, and are fitted together (see, for example, Patent Document 4). With this configuration, the adjacent water stop member 3X can be apparently integrated, and the water stop performance can be improved.

  However, the above-described expansion device joining method has several problems. First, the method (first method) of filling the joint with the elastic sealing material has a problem that workability on site is poor. This is because the elastic sealing material generally requires an operation of stirring two liquids composed of a reaction curable main agent and a curing agent. In other words, in order to use an elastic sealing material in the field, complicated measurement is required to mix the main agent and curing agent in the correct ratio, and if the amount of stirring is small, quality such as poor stirring will be adversely affected. There are problems such as being easy.

  Second, the method of matching the protruding portions having elasticity (second method) has a problem that it is difficult to determine the size of the protruding portions. This is because it is difficult to specify the amount of deformation and the state of the water stop member in the telescopic device. In addition, the expansion / contraction device differs in the expansion / contraction amount depending on the position where it is installed on the bridge or the like. Therefore, it is necessary to mold a water-stopping member having a protruding portion having a different size for each expansion / contraction amount of the expansion / contraction device, and the manufacture of the water-stopping member becomes complicated.

  3rdly, the method (3rd method) which adhere | attaches an adjacent water stop member with an adhesive has the problem that the water stop member adhere | attached with the adhesive peels and a water leak will generate | occur | produce. Yes. This is because the deformation amount of the water-stopping member and the deformation amount of the adhesive are often different, and the adhesion of the water-stopping member cannot be maintained.

  4thly, the method (4th method) which fits the uneven | corrugated shape formed in the edge part of a water stop member has the problem that a crack generate | occur | produces in a water stop member and a water leak will generate | occur | produce. Yes. This is because the deformation of the water-stopping member is three-dimensional and complicated in the first place, and the deformation becomes complicated due to the fitting of the concavo-convex shape, and abnormal deformation or the like occurs. Moreover, since the water stop member requires separate concave and convex members, the manufacture of the water stop member becomes complicated.

Japanese Patent Laid-Open No. 2003-129406 JP 2001-140206 A JP 2008-57246 A JP-A-8-284104

  The present invention has been made in view of the above problems, and its purpose is to improve the water stop performance at the joint portion of the expansion device by a simple method, suppress water leakage from the joint portion, and in field work. An object of the present invention is to provide a joining method and a stretching device for a stretching device that can easily join adjacent stretching devices.

  In order to achieve the above object, a method for joining an expansion device according to the present invention includes an expansion device having two plates, a backup member sandwiched between the plates, and a water stop member disposed above the backup member. In the joining method of the expansion / contraction device that joins a plurality of units in the width direction of the road bridge, the backup member is disposed between the two plates, and a reaction hardening type elastic body is filled above the backup member to provide a water stop member. At least a step of forming an expansion device by molding, a step of filling the reaction-curing elastic body into a plate-shaped mold and molding a connecting member, and an end surface of the expansion device in the width direction of the road bridge, at least A step of affixing the connecting member so as to cover a part of the water-stopping member; and a step of joining and fixing another extension device so as to sandwich the connection member of the extension device. And characterized in that it has a-up.

  With this configuration, it is possible to improve the water stop performance at the joint portion of the expansion device. This is because the water blocking member and the connecting member that closes the joint have the same material and the same physical properties. Moreover, the workability | operativity of the joining operation | work of an expansion-contraction apparatus can be improved remarkably in the field. This is because a mixing operation or the like for making a reaction-curing elastic body on site is unnecessary.

  In the above-described expansion device joining method, before the step of joining and fixing the expansion device, it is above the position where the connecting member is pasted, and on the plate side end surface extending in the vertical direction of the plate. And a step of attaching an auxiliary connecting member formed of the same material as the connecting member. With this configuration, it is possible to prevent water or the like from leaking out from the end face of the plate side and seeping into the placed concrete or the like.

  In the above expansion device joining method, the reaction-curing elastic body is a polybutadiene-based elastic body mainly composed of polybutadiene, a foamed polybutadiene-based elastic body obtained by adding a foaming agent to the polybutadiene, a modified polyurethane-based elastic body, or a polysulfide-based elastic body. It is characterized in that it is composed of any one of a body, a silicon-based elastic body, and a butyl rubber-based elastic body. With this configuration, the same effects as described above can be obtained.

  In order to achieve the above object, the telescopic device according to the present invention includes two plates, a backup member sandwiched between the plates, and a telescopic device having a water stop member disposed above the backup member. The apparatus has a water stop member molded with a reaction-curing elastic body, and a connecting member molded in a flat plate shape so as to be attached to the end surface of the water stop member, using the same material as the water stop member. Features. With this configuration, the same effects as described above can be obtained.

  According to the expansion device joining method and the expansion device according to the present invention, the water stopping performance at the joint of the expansion device is improved by a simple method, and water leakage from the joint is suppressed. It is possible to provide a stretching method and a stretching device that can easily join the devices.

It is the figure which showed the outline of the expansion-contraction apparatus of embodiment which concerns on this invention. It is the figure which showed the outline at the time of joining of the expansion-contraction apparatus of embodiment which concerns on this invention. It is the schematic which showed the conventional expansion-contraction apparatus. It is the schematic which showed the conventional expansion-contraction apparatus.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a method for joining an expansion device and an expansion device according to an embodiment of the present invention will be described. In FIG. 1, the outline of the expansion-contraction apparatus 1 of embodiment of this invention is shown. The expansion / contraction device 1 includes two plates 2 arranged opposite to each other, a backup member 6 disposed between the two plates 2, a water-stop member 3 disposed above the backup member 6, and a joint of the water-stop member 3. It has the flat connection member 4 affixed on the part 9 (edge part of the road bridge width direction y). Moreover, this plate 2 has the joining metal fitting 11 for connecting the adjacent expansion-contraction apparatus 1 mutually.

  Here, the water stop member 3 and the connecting member 4 are made of a reaction-curing elastic body. This reaction-curing elastic body may be composed of, for example, a polybutadiene-based elastic body in which polybutadiene is used as a main agent, an isocyanate prepolymer is used as a hardening agent, and the hardening agent is mixed in a mass of 5 to 10% with respect to the weight of the main agent. it can. The water-stop member 3 and the connecting member 4 made of this polybutadiene-based elastic body have high surface adhesiveness and a property that the total length is extended by 5 times or more. In addition, among the reaction-curing elastic bodies, those formed by mixing two kinds of materials are particularly called two-component elastic bodies. Moreover, the backup member 6 should just be a deformable material, for example, urethane etc. can be utilized. Furthermore, the plate 2 is made of a metal material.

  Next, the manufacturing method and joining method of an expansion / contraction apparatus will be described. First, the two plates 2 and the backup member 6 are combined at the factory. The expansion and contraction device 1 is manufactured by filling a mold-like space formed inside the plate 2 and the like with a two-component elastic body in which a main agent and a curing agent are mixed and curing. In addition, a two-component elastic body having the same quality as that described above is filled into a mold formed in a flat plate shape, cured and cured, and a flat plate-shaped connecting member 4 is molded. This flat connecting member 4 is wrapped in a sheet or the like that is difficult to adhere to the connecting member 4 so as to be transportable.

  Next, a primer is applied to the end of the expansion / contraction device 1 that becomes the joint 9 at the installation site of the expansion device such as a bridge. The connecting member 4 is affixed to the end of the telescopic device 1 to which this primer has been applied while peeling the sheet. Here, at the end face of the telescopic device 1, the connecting member 4 is bonded so as to cover at least a part of the water-stopping member 3, preferably the upper end, and more preferably the whole. Moreover, it is desirable that the connecting member 4 has a size that protrudes in the bridge axis direction x of the telescopic device 1. The other connecting members 2 are brought close to each other so as to match the extension device 1 to which the connecting member 4 is attached, and the two extension devices 1 are connected in the road bridge width direction y with bolts and nuts. At this time, the connecting member 4 is compressed in the road bridge width direction y. By repeating the above, a plurality of expansion devices 1 are connected in the road bridge width direction y. Thereafter, concrete and asphalt are placed in the bridge axis direction x of the expansion device 1 to complete the installation of the expansion device 1.

  With the above configuration, the following operational effects can be obtained. 1stly, the water stop performance in the junction part 9 of the expansion-contraction apparatus 1 can be improved. This is because the water stop member 3 and the connecting member 4 are made of the same material. That is, when an external force acts on the expansion / contraction device 1 and expands and contracts, the water stop member 3 and the connection member 4 behave as an integral material, so that no shear force is generated between the water stop member 3 and the connection member 4. Therefore, since the water stop member 3 and the connecting member 4 can be prevented from being peeled off, it is possible to prevent a situation in which a gap occurs in the joint portion 9 and water leakage occurs. Moreover, since the water stop member 3 and the connecting member 4 follow each other while maintaining an adhesive state even if complicated deformation occurs, the water stop performance can be improved.

  2ndly, the workability | operativity of the joining operation | work of the expansion-contraction apparatus 1 can be improved remarkably in the field where the expansion-contraction apparatus 1 is installed and joined. This is because an instrument and operation for mixing the main agent and the curing agent are not necessary. Moreover, since the two-component elastic body is not mixed on site, problems such as poor stirring do not occur. Furthermore, since mixing of two-component type elasticity, curing, and the like can be molded in a factory with a stable environment, the quality of the water stop member 3 and the connecting member 4 can be improved.

  Thirdly, the expansion / contraction device 1 can be bonded by a bonding method with high reproducibility. This is because, even in a site in an unstable environment unlike a factory, the expansion / contraction device 1 can be joined only by bonding the expansion / contraction device 1 and the already formed connecting member 4. .

  In addition, as for the connection member 4, it is desirable that the thickness of the road bridge width direction y shall be 0.5 mm or more and 30 mm or less. Moreover, if the material of the water stop member 3 and the connection member 4 is a reaction hardening type elastic body, it will not be restricted to the above. For example, a foamed polybutadiene-based elastic body may be used by adding a foaming agent to the polybutadiene described above. Examples of the elastic body include a two-component elastic body in which a main agent to which a foaming agent is added and a curing agent are mixed, or a three-component elastic body in which a main agent, a curing agent, and a foaming agent are mixed. Further, a two-component mixed type or two-component type modified polyurethane elastic body may be used. Furthermore, a polysulfide elastic body, a silicon elastic body, or a butyl rubber elastic body may be used. In addition, this polysulfide type elastic body has a one-component type or a two-component type.

  In addition, when the water stop member 3 and the connecting member 4 are molded, it is desirable to use a reaction hardening type elastic body mixed in the same mixing container. This is because the water stopping member 3 and the connecting member 4 have the same physical properties.

  In FIG. 2, the outline at the time of joining of the expansion-contraction apparatus 1a of different embodiment of this invention is shown. The upper part of FIG. 2 shows an end surface that becomes the joint 9 of the expansion / contraction device 1a. The plate 2 of the telescopic device 1a has a plate side end face 21 extending in the vertical direction. In addition, 20 has shown the placement plan area | regions, such as concrete, and concrete etc. are not placed when joining the expansion-contraction apparatus 1a.

  The lower part of FIG. 2 shows a state in which the connecting member 4 is pasted on the telescopic device 1a. The connecting member 4 has a length that can cover at least the entire water blocking member 3 in the bridge axis direction x. Desirably, the connecting member 4 has a height that can cover the entire water blocking member 3 in the vertical direction z. The auxiliary connecting member 5 is attached to the plate side end face 21 located above the water stop member 3. As the auxiliary connecting member 5, a member obtained by cutting the connecting member 4 into small pieces can be used.

  With the above configuration, the water stop performance of the plate side end face 21 can be improved. That is, it is possible to prevent water or the like from leaking out from the plate side end face 21 and seeping into the placed concrete 20 or the like.

DESCRIPTION OF SYMBOLS 1, 1a Expansion-contraction apparatus 2 Plate 3 Water stop member 4 Connecting member 5 Auxiliary connecting member 6 Backup member 9 Joint part 20 Road 21 Plate side part end surface x Bridge axial direction y Road bridge width direction

Claims (4)

In the joining method of the telescopic device that joins two plates, a backup member sandwiched between the plates, and a telescopic device having a water stop member arranged above the backup member in the road bridge width direction,
Arranging the backup member between the two plates, filling a reaction-curing elastic body above the backup member and molding a water stop member to produce an expansion device;
Filling the reaction-curing elastic body into a plate-shaped mold and molding a connecting member;
Affixing the connecting member so as to cover at least a part of the water-stopping member at the end face of the expansion / contraction device in the road bridge width direction;
A joining method for an expansion / contraction device, comprising the step of joining and fixing another expansion / contraction device so as to sandwich the connecting member of the expansion / contraction device. Before the step of joining and fixing the telescopic device,
A step of attaching an auxiliary connecting member formed of the same material as that of the connecting member to a plate side end surface extending in a vertical direction of the plate above a position where the connecting member is attached; The joining method of the expansion-contraction apparatus of Claim 1 to do.   The reaction-curing elastic body is a polybutadiene-based elastic body mainly composed of polybutadiene, a foamed polybutadiene-based elastic body obtained by adding a foaming agent to the polybutadiene, a modified polyurethane-based elastic body, a polysulfide-based elastic body, a silicon-based elastic body, or a butyl rubber. 3. The expansion / contraction apparatus joining method according to claim 1, wherein the expansion apparatus is composed of any one of an elastic body. In a telescopic device having two plates, a backup member sandwiched between the plates, and a water stop member disposed above the backup member,
The expansion and contraction device has a water stop member formed of a reaction-curing elastic body, and a connecting member formed of a flat plate so as to be attached to the end surface of the water stop member using the same material as the water stop member. A telescopic device characterized by that.

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