JP4582585B2 - Fasteners for joint members - Google Patents

Description

In the present invention, a covering member such as a rubber sheet covering a joint portion or a joint portion between a concrete structure such as a tunnel or a box culvert structure is adhered to the concrete structure evenly in a linear direction by dispersing anchor supporting pressure. The present invention relates to a fastener for a joint member to be made.

A first example of a joint water leakage treatment method in a concrete frame as this type of prior art is disclosed in Japanese Patent Application Laid-Open No. 11-22394 as shown in FIGS. 6 (a) and 6 (b). Technology. Explaining this, FIG. 6 (a) shows a processing construction mode in a mountain tunnel of a highway. First, a diamond cut with a predetermined depth at a 45 ° angle is applied to a predetermined portion of the concrete frame 1. The slope is cut with an electric hammer or air hammer. In this case, in the new construction, joints are created in advance in the joint part of the mold such as centle, or face wood is applied. And the water guide groove 3 of the predetermined depth width according to a design is previously formed with respect to the said slope cut part 2 with respect to the concrete frame 1 by internal winding. In addition, a resin lining 4 such as a primer and putty material is applied to the slope cut portion 2 of the diamond cut, and the rubber plate is used for leaking water of a rubber plate previously formed in a W-shaped corrugation by applying an end to the both slope cut portions 2. The water guide groove 5 is brought into contact with the water guide groove 3 so as to be covered with an underhang. Next, an angle 6 is set in a cover shape on the slope cut portion 2 of the leakage water slat 5 and bonded with a predetermined adhesive. The same applies to the opposite ends of both the angles 6 and 6, that is, the end of the angle presser 7, but due to the time-dependent expansion and contraction of the concrete casing 1 and the time-dependent expansion and contraction of the leakage water slat 5. In order not to constrain the behavior due to mutual interference, a gap portion 8 having a play width is provided, or they are set so as to be able to slide with each other by overlapping. Finally, the anchors 9, 9 are fastened by bolting. At this time, since the slope cut portion 2 of the leakage water slab 5 is a diamond cut by a conduction hammer or an air hammer with respect to the concrete skeleton 1, the adhesive set through the primer and putty material is sufficiently compatible with each other. It is adhered to the close contact type and has a reliable leakage water function.
In the embodiment shown in FIG. 6 (b), the water stoppage can be enhanced by densely filling the water guide groove 3 with a foaming elastic material 10 such as polyurethane prior to the setting of the leakage water plate 5. . In addition, the size is designed in advance so that the distal end portion of the leakage water slat 5 does not protrude from the inner space A to the outside.

Next, a second example of a tunnel leakage guide device as a conventional technique is disclosed in Japanese Patent Application Laid-Open No. 2-132300 as shown in FIG. To explain this, the water conduit has the following structure. As shown in FIG. 7, a drain corner 11 made of hard vinyl chloride coated with a soft vinyl material is concreted with anchor bolts 13 and nuts 14 via a drain sealer 12 made of a closed foam, that is, a foam having discontinuous cells. It is fixed to the wall 15. These drain corners 11 are composed of a pair of left and right vertically extending along the inner wall surface of the concrete, and a water guide plate 17 in which a special acrylic-modified resin and vinyl chloride are blend-molded in a groove 16 disposed opposite to the tip thereof. Is inserted and gripped in a watertight state. Since the drain sealer 12 is elastic and does not absorb water, the drain sealer 12 closely adheres to the uneven surface of the concrete wall 15 and blocks water. The drain corner 11 and the water guide plate 17 form a water channel 13 between the inner wall surface of the tunnel. The water conduit is adjusted by connecting a plurality of drain corners 11 and the water guide plates 17 in the length direction while using the water guide plates 17 of various standards as required. The In this connection, the drain corner 11 is arranged in a butted state in the length direction and fixed by the anchor bolt 13 and the nut 14. The water guide plate 17 projects the upper part of the downstream water guide plate 17 upward from the top surface of the drain corner 11, cuts the left and right ends of the projecting portion obliquely, and makes the projecting portion outside to project the upstream water guide plate 17. It is overlapped with the lower part, and the overlapped gap is filled with a silicon caulking material and bonded. As the water conduit, as shown in FIG. 7, a water conduit having a heat insulating material 18 attached to the inner surface of the water guide plate 17 is also used. For example, the heat insulating material 18 is obtained by bonding a vinyl sheet to a heat insulating material made of an independent foam.

Further, a third example of a water conduit as another prior art is disclosed in Japanese Patent Laid-Open No. 9-256800 as shown in FIG. To explain this, the water conduit is composed of a main body 19 for forming a water guide space between the surface of a concrete structure such as a tunnel, a fixture 21 including an anchor 20 for fixing the main body 19 to the structure, and The anchor 20 is configured by an anchor cover 12 for preventing a drop of water droplets covering the anchor 20 from the outside. The heel body 19 includes a flat portion 19a made of a hard resin and having a width that covers the crack portion, and a bent portion 19b formed by bending both sides of the flat portion 19a. The bent portion 19b is detachably attached to the fixture 21, and is bent from the flat portion 19a in a substantially right angle direction. Reference numeral 22 denotes a presser rubber having a circular cross section which is attached to the outside of the bent portion 19a with an adhesive, and has a groove in the longitudinal direction on the surface thereof for the purpose of sufficiently resisting an engagement piece of a base plate 23 described later so as not to fall off. Is formed. The fixture 21 includes an anchor 20 and a base plate 23 made of hard plastic. End pieces 23a are formed at both ends of the base plate 23, and a hook-like engagement is formed at the tip in the same direction as the end pieces 23a. An engaging projection 23b having a piece is formed. The anchor 20 is formed with an internal thread on the outer periphery of the rear end, the tip of the anchor 20 is opened in the structure, and is fixed to the structure. The anchor 20 is screwed into the anchor bolt 20a and between the nut 20b and the base plate 23. And a saddle 20c provided for the purpose of evenly fixing the base plate 23. 24 is a convex sealing material made of foamed resin provided on both side wall surfaces of the base plate 23. The sealing material 24 is in close contact with the structure wall surface in a compressed state, thereby preventing water leakage from this portion. In particular, by making the surface of the sealing material 24 convex, the concrete wall surface 25 and the sealing material 24 are brought into a complete contact state. The anchor cover 12 is formed with an engagement protrusion 12 a having an engagement claw that engages with an engagement piece of the base plate 23 on an anchor cover body having a ship bottom cross-sectional shape. By pushing the anchor cover 12 from below the base plate 23, the engaging piece of the base plate 23 and the engaging claw of the anchor cover 12 are mechanically fitted, and the anchor cover 12 is attached to the fixture 21. The anchor cover 12 is made of a hard resin considering impact resistance and flame resistance against flying of stone, contact, fire, etc., for example, and a soft resin layer for absorbing shock is formed on the surface of the anchor cover 12. Sometimes. The structure of the conventional water conduit has been described above.
Japanese Patent Laid-Open No. 11-22394 Japanese Patent Laid-Open No. 2-132300 Japanese Patent Laid-Open No. 9-256800

Since the conventional technology has the above-described configuration and operation, the following problems existed.
In other words, metal fittings that have been used in tunnels and joints have been processed quite complicatedly, and the method of installing the rod disclosed in the construction is a point-like shape with a concrete anchor via a plate-like member. It is the structure which is fastened to and pressed evenly. In many cases, an adhesive is used for the casing. The hook or the fixing part is a relatively soft member because it must have an expansion / contraction function, and a plate member is fastened with an overlap bolt. Therefore, if the plate member is a relatively thin member, the pressing force There was a problem that could not work equally. Further, the water leakage prevention function, which is the original function, does not work due to a decrease in the elastic force of the eaves member over time. The conventional planar spring is located around the bolt and has a similar problem because it is a point-like press.

Further, in the prior art, as shown in FIG. 9, it is common to fix the leakage water slat 5 (flat bar) with a concrete anchor, but in this case, the supporting pressure S is concentrated on the anchor portion. Since it is introduced, there is almost no support pressure between the anchors and the anchors cannot be brought into close contact with the concrete structure 1. In the water conduit 5 and the like for the purpose of water stopping, there is a problem that it is necessary to use an adhesive or the like separately because the required performance is not satisfied in the above state.

In addition, for example, in the railway bridge joint method, construction is performed in a situation where the construction time at the time of new construction is sufficient, and cracks due to deterioration of joint fillers at joints, leakage of water leakage due to peeling of formed rubber, etc. About repair construction, it was difficult to repair with conventional technology between railway operation overcrowded diamonds, and there was a problem that construction time was shortened by simplifying the construction method.

In addition, most of the icicles on the viaduct are found at the joints, and many of these icicles are found on the joints where no measures are taken (the roadside). Observed, because rainwater and snowmelt water permeate the gap between the packing material (elastite and rubber system) and the play. In addition, when rainwater or snowmelt water permeates or stays on the concrete surface in winter, it repeatedly freezes and thaws, causing a problem of promoting deterioration of the concrete.
The problem to be solved by the present invention is to solve the problems described in the background art.

The joint bracket for joint members according to the present invention is a bracket capable of fixing a covering member such as a ridge without requiring a flat plate-like member, and has a simple structure capable of holding a distributed and uniform pressing force. In addition, by tightening a waterproof sheet as a covering member on the upper surface of the joint with a concrete anchor, it exerts the spring effect of the metal fitting made of a spring structure, thereby providing a continuous crimping effect with a concentrated load as a distributed load. The purpose of the present invention is to provide a fastener for a joint member intended to greatly simplify the process as compared with the prior art, and comprises the following constitution and means.

That is, according to the first aspect of the present invention, there is provided a metal fitting for fixing a covering member covering a joint portion or a joint portion of a tunnel or a box culvert structure in the vicinity of substantially both end portions of the structure, It is a plate-like object having a predetermined length in the longitudinal direction of the joint portion, and the front and back surfaces in the width direction are formed with concave and convex shapes from both sides, and the central portion in the width direction is spaced at a predetermined interval in the longitudinal direction. drilled bolt holes in the bolt and fastened by inserting into, Rutotomoni not provided with a transparent weather resistance as the covering member for flaking prevention of the concrete water conduit and concrete structure end and a water leakage from the natural ground It is characterized by pressing and fixing an FRP plate (fiber reinforced plastic material) made of a plate material made of a saturated polyester and having a self-extinguishing resin .

Since the joint metal fitting according to the present invention has the above-described configuration, the following effects are obtained.

That is, according to the first aspect of the invention, it is a construction method in which an FRP board or a waterproof sheet is attached in a waterproof line shape across a crossing joint of a box culvert, a crossing joint of a road tunnel, etc. In this case, the FRP plate or sheet is brought into close contact with the concrete frame / structure without gaps, and the present invention is, for example, only by attaching the FRP plate or the waterproof sheet with a bolt such as a concrete anchor to a pitch of about 20 to 70 cm. There is an effect that it can be fixed to a concrete wall without using an adhesive or the like. In addition, since a highly transparent FRP plate is used, it is easy to monitor deformation inside the fence, such as peeling and clogging of earth and sand, and appropriate maintenance is possible, and since the FRP plate has self-extinguishing properties, This has the effect of ensuring safety in the event of a fire.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a joint member fastener according to the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a cross-sectional view showing a state in which a covering member covering a concrete structure is pressed and fixed using a joint member fastener according to the present invention.
FIG. 2 is a schematic view showing a state in which the entire joint member fastener according to the present invention is fixed to a concrete structure with a predetermined interval on the covering member, for example, with a concrete anchor. It is the figure which showed the state which a fastener attaches | bonds to this coating | coated member as a distributed load.

Reference numeral 26 denotes various concrete structures such as tunnels, box culverts, bridges, and railway structures. Reference numeral 27 denotes a covering member that covers a joint portion (not shown) or a joint portion (not shown) of the concrete structure. This covering member functions as a pressing object of the concrete structure 26, and specifically, a waterproof sheet having a thickness of about 3 (mm), for example, an FRP board (fiber reinforced plastic material) having a transparent weather resistance. Etc.

Reference numeral 28 denotes a joint fitting for a joint member according to the present invention, which is a fitting for fixing the covering member 27 covering the joint part or joint part of the concrete structure 26 in the vicinity of both ends of the concrete structure 26. . The joint member fastener 28 is formed of a plate-like object having a predetermined length in the longitudinal direction of the joint part or the joint part, and the front / back surface shape in the width direction, that is, the side surface shape is uneven from both sides. Forming. The joint member fastener 28 has a simple configuration in which a single steel plate, for example, a stainless steel plate or a spring steel, is bent into a substantially M shape as shown in FIG. 1 so as to increase the bending rigidity. .

Further, as shown in FIG. 1, the joint member fastener 28 is formed in a concave-convex shape from both end sides 28a, 28a toward the center in the width direction, specifically, for example, a substantially M-shape as a whole. A first vertex portion 28b and a second vertex portion 28c which is a central point are formed. The first and second vertex portions 28c are not in contact with the surface of the covering member 27 and are in a floating state, and the second vertex portion 28c secures a distance t from the surface of the covering member 27, for example, As shown in FIG. 2, when the bolts 29 such as anchor bolts are fastened to the joint member fasteners 28 every predetermined length of the joint member fasteners 28, that is, three springs of the joint member fasteners 28 are provided. As shown in the figure, the joint member fixing bracket 28 continuously applies the anchor supporting pressure or the pressing force to the covering member 27 in the length direction evenly to improve the crimping effect as the distributed load Q. Plan.

The covering member 27 is made of, for example, one or more compositions of ethylene / propylene rubber (EPM, EPDM), high purity chloroprene rubber, natural rubber, recycled rubber, and high damping rubber. The covering member 27 has a function of guiding leakage of water from the natural ground and preventing the concrete from peeling off at the end of the concrete structure. In addition, the covering member 27 is pressed and fixed to stop rainwater and snowmelt water.

A bolt hole 28d through which a bolt 29 such as an anchor bolt is inserted is drilled at a predetermined interval in the longitudinal direction of the covering member 27 at the second vertex 28c, which is the center point of the covering member 27. ing.
Here, the construction work for covering the covering member 27 with the concrete structure 26 includes a peeling prevention work, a water conveyance countermeasure work, and a maintenance work. According to the actual result of the concrete side fall from the joint area, the weight of the dropped concrete block is, for example, about 0.5 kN (50 kgf) per 1 m in the circumferential direction of the joint part. Considering the safety factor, it is desired to have a load holding capacity of, for example, 2 kN / m by a loading test, and a peeling prevention function has been confirmed by an experiment.

As for the water transfer countermeasure construction, in the tunnel of the conventional construction method, the crossing joint part is a place where countermeasures against water leakage are desired at the same time as measures against peeling. Therefore, a water-stopping material made of foamed polyethylene foam is installed on both sides of the FRP plate to provide a function as a water conduit. A water-stopping test was carried out in the experiment, and the joint portion of the FRP plate was abutted and an adhesive sheet was attached thereto, and the water-stopping performance was good.

In the maintenance work, the peeling prevention plate uses a highly transparent FRP plate, so that it is easy to monitor deformation inside the ridge, such as peeling or clogging of earth and sand, and appropriate maintenance can be performed. In consideration of safety during a fire in a tunnel, using a self-extinguishing resin as the material of the FRP plate.

Next, an assembling procedure and action in the embodiment of the joint member fastener according to the present invention will be described.

First, a covering member 27 made of, for example, an FRP plate (fiber reinforced plastic material) is covered on a joint portion or a joint portion of a concrete structure 26 such as a tunnel or a box culvert structure. Then, the joint member fixing metal fitting 28 having an uneven shape on the front and back surfaces, for example, a substantially M-shaped cross section, is brought into contact with the covering member 27. Specifically, both end sides 28 a and 28 a of the joint member fastener 28 are set and arranged on the surface of the covering member 27. At this time, the first and second apex portions 28 b and 28 c located at the center portion from both end sides 28 a and 28 a of the joint member fixing metal 28 are arranged in a state of being floated from the surface of the covering member 27.

Then, the bolt shaft 29a of the bolt 29 such as an anchor bolt is inserted into the bolt hole 28d of the joint member fastener 28, and the tip end portion 29b of the bolt shaft 29a is driven into the concrete structure 26 as shown in FIG. . At this time, the head 29c of the bolt 29 such as an anchor bolt presses the peripheral portion 28e of the bolt hole 28d of the joint member fastener 28. Thus, as is apparent from the schematic diagram of the action distribution load Q of the joint member fastener 28 shown in FIG. 3, the support pressure P of the bolt 29 is applied to the joint member fastener 28, and the joint member fastener 28. It was found that the support 28 or the pressing force was applied evenly to the covering member 27 by the metal fitting 28 to improve the fixing effect to the concrete structure 26.

In this way, the joint member 28 made of stainless steel plate is bent into a substantially M shape by bending with a bender or a forming press to increase the bending rigidity, and at the position where the bolt 29 such as an anchor bolt is installed, the rubber sheet as the covering member 27 By securing the clearance between the joint fittings 28 for joint members, the clearance exerts a spring effect when tightening bolts 29 such as anchor bolts, thereby dispersing the anchor support pressure, which is a concentrated load, and maintaining it. Thus, the covering member 27 can be brought into close contact with the concrete structure 26, for example, a concrete floor slab, evenly in the linear direction.

Next, Example 1 constructed as a jointer for a concrete structure using the joint member fastener according to the present invention will be described with reference to FIG.

A joint 30 is interposed between the concrete structures 26, 26, and a rubber member 31 formed, for example, in a cylindrical shape is inserted into the joint 30. The rubber member 31 is compressed and deformed in the joint portion 30 and has a water leakage preventing function. After sealing the sealing agent 32 from above the joint portion 30, the waterproof sheet having a thickness of about 3 (mm) on the surface of the concrete structures 26 and 26 and straddling the joint portion 30. The covering member 27 such as is covered.

The joint member fastener 28 described above has a width of about 50 (mm). For example, according to a general-purpose design procedure, the covering member 27 is spaced at an interval of about 200 (mm) with the joint portion 30 interposed. Arranged at a predetermined position. Then, the bolt shaft 29a of the bolt 29 such as an anchor bolt is inserted into the bolt hole 28d of the joint member fastener 28, and the tip end portion 29b of the bolt shaft 29a is driven into the concrete structure 26. At this time, the head 29c of the bolt 29 such as an anchor bolt presses the peripheral edge of the bolt hole 28d of the joint member fastener 28.

An adhesive may be applied between the covering member 27 and the concrete structure 26 in order to increase the degree of bonding between the lower surface of the covering member 27 and the surface of the concrete structure 26.

In addition to that shown in FIG. 1, the fastener for joint member according to the present invention may be one having a variety of shapes shown in FIGS. 5A to 5E as Example 2.

The joint member fasteners 28A shown in (a) are substantially the same as the shape shown in FIG. The difference is that both sides form flat surfaces 28A1 and 28A1. In the figure, 28A2 is a bolt hole formed at the center point.

The joint member fastener 28B shown in (b) is characterized in that the central portion forms an arcuate portion 28B1.
In the figure, 28B2 is a bolt hole formed at the center point.

The joint member fixing metal 28C shown in FIG. 5C is characterized in that a generally arcuate portion 28C1 is formed.
In the figure, 28C2 is a bolt hole formed at the center point.

The joint member fastener 28D shown in (d) is characterized in that a central portion forms a planar portion 28D1.
In the figure, 28D2 is a bolt hole formed at the center point.

The joint member fastener 28E shown in (e) is characterized in that arc-shaped portions 28E1 and 28E1 and a continuous flat portion 28E2 interposed therebetween are formed on the left and right, respectively.
In the figure, 28E3 is a bolt hole formed at the center point.
The desired crimping effect on the covering member 27 can be obtained by appropriately selecting and using the joint member fasteners 28 having various shapes described above according to the design specifications of the construction site such as water leakage prevention.

BRIEF DESCRIPTION OF THE DRAWINGS It is the vertical sectional view which shows the state which fixed the metal fitting for metal joint members concerning this invention to the coating | coated member, and shows embodiment of this invention. FIG. 2 is a schematic view showing an embodiment of the present invention, showing a state in which a joint metal fitting according to the present invention is fixed to a covering member. FIG. 2 shows a state in which a joint metal fitting according to the present invention is fixed to a covering member, showing an embodiment of the present invention, and a schematic view showing a distribution load of a support pressure of an anchor bolt. BRIEF DESCRIPTION OF THE DRAWINGS It is a vertical sectional view which shows Example 1 which used the fastener for joint members based on this invention for the joint work of a concrete structure. It is a side view which shows the modification of various implementations of the fastener for joint members concerning this invention, Comprising: (a) is drawing substantially the same as the shape shown in FIG. (B) is a drawing in which a central portion forms an arc-shaped portion. (C) is a drawing in which a generally arcuate portion having a gentle shape is formed. (D) is a drawing in which a central portion forms a planar portion. (E) is a drawing in which an arc-shaped portion and a planar portion connected to each other are formed on the left and right, respectively. It is the 1st example of the prior art, and is a drawing which shows the leakage water processing method of the joint part of a concrete frame, (a) is a vertical sectional view, (b) is filled with foaming elastic agents, such as polyurethane. It is a vertical sectional view showing a state. It is a 2nd example of the prior art, Comprising: It is a vertical sectional view which shows an example of the water leakage guide apparatus of a tunnel. It is a 3rd example of the prior art, Comprising: It is a vertical sectional view which shows an example of a water conduit. FIG. 6 is a vertical sectional view showing a state in which a support pressure S by an anchor bolt is applied to a clat bar covered with a concrete structure in the prior art.

26 Concrete structure 27 Cover member 28 Joint member fasteners 28A to 28E Joint member fasteners 28A1 Flat surface 28A2 of joint member fasteners Arc point 28B2 of joint member fasteners 28B1 Joint member fastener bolt hole 28C1 Joint member fastener arc-shaped portion 28C2 Joint member fastener bolt hole 28D1 Joint member fastener flat portion 28D2 Joint member fastener bolt hole 28E1 Joint member Arc-shaped portion 28E2 of the fastening member Flat portion 28E3 of the fastening member for the joint member Bolt holes 28a and 28a of the fastening member for the joint member 28b Both ends 28b of the fastening member for the joint member First apex portion 28c of the joint member fastening member For joint member The second apex portion 28d of the fasteners Bolt holes 28e of the joint member fasteners Bolts of the joint member fasteners DOO hole of the peripheral portion 29 volts 29a volt bolt shaft 29b volt bolt shaft of the tip portion 29c bolt head 30 joints 31 rubber member 32 sealing agent

Claims (1)

A metal fitting for fixing a covering member covering a joint or joint of a tunnel or box culvert structure in the vicinity of both ends of the structure, and having a predetermined length in the longitudinal direction of the joint or joint The front and back surfaces in the width direction are plate-shaped objects and are formed with irregular shapes from both ends, and bolts are inserted into bolt holes that are drilled at predetermined intervals in the longitudinal direction at the center in the width direction. It concluded, and the water guide the water leakage from the natural ground, with the provided transparent weather resistance as the covering member made of a Rutotomoni unsaturated polyester and self-extinguishing property to the spalling prevention of the concrete of the concrete structure end A fastener for joint members characterized by pressing and fixing an FRP plate (fiber reinforced plastic material) made of a plate material using resin .

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