JP2002021166A - Fitting method for flexible joint - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joining method for culverts using a flexible joint greatly reducing working load, drastically improving the fitting work efficiency, and providing a superior cutoff effect. SOLUTION: The flexible joint 1 has protuberant stoppers 1a and 1b in both ends, the culverts 10a and 10b have flexible joint fixing parts having locking devices locking the stoppers 1a and 1b and fixing devices fixing the locking devices. The locking devices are temporarily fixed in positions opened wider than the stoppers 1a and 1b of the flexible joint 1 so as to form openings. One stopper 1a of the flexible joint 1 is fitted to the flexible joint fixing part of one culvert 10a, the other stopper 1b of the flexible joint 1 is inserted into the opening to release the temporary fixing. The other stopper 1b of the flexible joint 1 is rained by the locking device and the locking device is fixed by the fixing device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of attaching a flexible joint, and more particularly, to a method of attaching a flexible joint to a pair of culverts to be connected. In particular,
The present invention relates to a method of mounting a flexible joint that has extremely good workability even when a pair of culverts to be connected are installed underwater or in the sea.

[0002]

2. Description of the Related Art Culverts are mainly used by being buried underground or underwater. For large objects, they are used for main roads, crossing roads, crossing waterways, and for small objects, culverts of small cross section are used. (Water channels without lids) and common ditches.

[0003] Generally, a culvert joint is provided between a pair of culverts to be connected with a short cylindrical flexible joint made of an elastic material such as rubber or synthetic resin, and culverts to which both ends of the flexible joint are to be connected. Fix with bolts and nuts along the inner peripheral wall of.

In this case, usually, bolts are provided at regular intervals on the culvert side, and bolt insertion holes are provided in advance at both ends of the flexible joint.
At the time of the enforcement, the bolt insertion hole of the flexible joint is inserted into the bolt fixed to the culvert at the site and tightened so that it cannot be removed, thereby absorbing the relative displacement between the opposing culverts, Water can be stopped.

However, the distance between the ends of the culverts to be connected generally varies considerably, such as when the culvert is placed underwater, and the bolt insertion hole of the flexible joint and the culvert-side bolt are normally positioned. Therefore, in order to insert the bolt into the bolt insertion hole, the flexible joint must be expanded and contracted at the site by using human power or a jig at the time of execution.

In such a case, since the flexible joint itself also has considerable rigidity, it requires a considerable amount of time and skill, and in particular, such as a culvert whose space is limited and a caisson placed in water. Connecting culverts with poor conditions was a very difficult task.

For example, when a pair of culverts 10 are immersed in water or in the sea, first, as shown in FIG. 11, the culverts 10a and 10b are immersed in water by a hanging means 9 such as a crane. Then, as shown in FIG. 12, an operation is performed so that bolts 5 provided at regular intervals on the culverts 10a and 10b side pass through bolt insertion holes 1e provided at both ends of the flexible joint 1. It is. An anchor bolt 8 is provided in the vertical axis direction of the bolt 5. As shown in FIG.
On the other hand, after penetrating the bolt insertion holes 1 e provided at both ends of the flexible joint 1, the holding plates 4 are installed at both ends of the flexible joint 1. The holding plate 4 is provided with a through hole so that the bolt 5 can pass therethrough, and the holding plate 4 is installed at both ends of the flexible joint 1 with the bolt 5 passing through the through hole. Thereafter, the nut 6 is fitted to the bolt 5 from above the holding plate 4 and fixed.

However, as described above, the bolt insertion hole 1e of the flexible joint 1 and the bolt 5 on the culvert side do not usually align with each other, and the flexible joint 1
The culvert 1 is inserted into the bolt insertion hole 1e provided in
The work of inserting the bolts 5 fixed to 0a and 10b tends to be difficult.

In view of the above, there has been proposed a culvert connection structure which eliminates the need for the connection between the bolt on the culvert side and the bolt insertion hole of the flexible joint. The connection structure of this culvert connects a pair of culverts by using a short tubular flexible joint having a bulging portion at an end, and is provided on the inner peripheral surface of the culvert, and an opening portion is narrowed. The bulge of the culvert is inserted into the space, and the culvert is connected across a pair of culverts.

According to this method of connecting a culvert, even if the culvert is installed in water, it is necessary to insert a bolt provided on the culvert side into a bolt insertion hole provided in the flexible joint. Therefore, the difficulty of the mounting operation is relatively alleviated.

[0011] However, in the above-mentioned invention, the disclosure of the simplicity of handling such a flexible joint is insufficient. In particular, box culverts that support an overloaded load with bending moment and shear force as box ramen often pass through the ground and extend to the sea, and when used to join such box culverts, installation work is required The need to alleviate the difficulties of coping is urgently needed. In other words, when installing a box culvert in the sea, first, the box culvert is hooked, the hooked box culvert is lowered in the sea, and the flexible joint is fixed by diving work manually under the sea. In such a case, a technique for joining the flexible joint to the box culvert easily is desired.

On the other hand, in order to obtain a flexible joint which is used for a culvert buried in water or soil and exhibits an excellent water stopping function, an inner frame member inscribed in the culvert and an outer frame plate material inscribed in the culvert are provided. Are interconnected at predetermined intervals, and the respective inner frame plate members and the respective outer frame plate members are liquid-tightly connected with the respective flexible membranes, and the end plate that is in contact with the culvert end face is formed inside the end plate. A flexible joint is provided which is provided continuously to one of a frame plate material and an outer frame plate material.

According to this connection method, a pair of culverts can be joined by a flexible joint having a relatively excellent water stopping function, but the culvert is provided in a bolt insertion hole provided in the flexible joint on the culvert side. It cannot be denied that the difficulty of installation work of possible joints has not been alleviated especially when the culvert is immersed in water or in the sea.

[0014]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and when a pair of culverts, culverts, etc. are joined by using a flexible joint, the work load is greatly reduced, and The present invention provides a joining method using a flexible joint having a good water-stopping effect, with the aim of dramatically improving the efficiency of the work of attaching a flexible joint, and particularly, a culvert immersed in water or in the sea. It is an object of the present invention to drastically reduce the burden of the joining operation when the joints are joined by using a flexible joint.

[0015]

According to a first aspect of the present invention, there is provided a method of attaching a flexible joint, comprising attaching the flexible joint to a pair of culverts to be connected. In the above, the flexible joint has a knot-shaped slip stopper at both ends, and the culvert has a holding tool for holding the slip stopper and a fixing tool for fixing the holding tool. An opening is formed by temporarily fixing the presser at a position wider than the slip-stopping portion of the flexible joint to form an opening. Attach one slip stopper of the flexible joint, insert the other slip stopper of the flexible joint into the opening,
A method of attaching a flexible joint, wherein the temporary fixing is released, the other stopper portion of the flexible joint is held down by a holding member, and the holding member is fixed by the fixing member.

According to a second aspect of the present invention, in the method for mounting a flexible joint according to the first aspect, the holding member is a holding plate having a hole.
The fixing tool comprises a bolt and a nut, wherein the hole is capable of penetrating the bolt, and a cross-sectional shape of the hole is an elliptical elongated hole.

According to a third aspect of the present invention, there is provided a flexible joint mounting method according to the first or second aspect, wherein the natural length is a length of the flexible joint in a natural state. Is a method of attaching a flexible joint that is longer than the length of the flexible joint fixing portion of one culvert and the flexible joint fixing portion of the other culvert.

According to a fourth aspect of the present invention, there is provided a method of mounting a flexible joint according to any one of the first to third aspects, wherein the temporary fixing member is a holder for the culvert. By temporarily fixing the wire with a linear material at a position wider than the slip preventing portion of the flexible joint, and releasing the temporary fixing is performed by cutting the temporarily fixed wire. This is a method of attaching a flexible joint.

According to a fifth aspect of the present invention, there is provided a method of mounting a flexible joint according to any one of the first to fourth aspects, wherein:
This is a method for mounting a flexible joint having a high hardness rubber portion therein.

According to a sixth aspect of the present invention, in the method for mounting a flexible joint, the flexible joint is mounted on a pair of culverts to be connected. The flexible joint has notches at both ends, and the culvert holds the holding plate that holds down the end of the flexible joint, a bolt that can pass through the notch, and a screw that is screwed with the bolt to hold the holding plate. And a nut to be fixed, having a flexible joint fixing portion having one end of the flexible joint attached to the flexible joint fixing portion of one culvert, and then having a flexible joint fixing portion of the other culvert. And mounting the other end of the flexible joint.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to a method of attaching a flexible joint to a pair of culverts. A flexible joint 1 used in the present invention is shown in FIG. The flexible joint 1 is provided with bump-shaped slip stoppers 1a and 1b at both ends. The flexible joint 1 can be made of a natural material such as natural rubber (NR), for example.
Is configured such that the reinforcing fiber layer 2 is present inside.
The reinforcing fiber layer 2 can be formed of, for example, carbon fiber or glass fiber. In the flexible joint 1, oil, zinc white, stearic acid, sulfur as a vulcanizing agent, a vulcanization accelerator, an antioxidant, and the like can be mixed as other components other than the main material.

On the other hand, a high hardness rubber portion 3 is provided in the slip stoppers 1a and 1b. When the high hardness rubber portion 3 is provided, the high hardness rubber portion 3 is integrated with the holding plate 4 as described later. When the protruding portion 4a provided on the second member engages with the slip stoppers 1a and 1b, the engagement can be more stably and firmly fixed. The high hardness rubber portion 3 can be formed of a natural rubber (NR) or the like as a main material, similarly to the flexible joint 1. The high-hardness rubber portion 3 can also contain oil, zinc white, stearic acid, sulfur as a vulcanizing agent, a vulcanization accelerator, an antioxidant, and the like as other components other than the main material. 2 shows a specific example of the combination of the flexible joint 1 and the high hardness rubber portion 3. The numerical values are shown in parts by weight.

[0023]

[Table 1]

FIG. 2 is a view for explaining a joint portion in which one end of a flexible joint is joined to a flexible joint fixing portion of one culvert.

The flexible joint fixing portion has a holding member for holding the slip stoppers 1a and 1b provided at both ends of the flexible joint 1, and a fixing member for fixing the holding member. The holding member can be configured as, for example, the holding plate 4. The fixing device can be specifically composed of a bolt 5 and a nut 6. An anchor bolt 8 is provided on the shaft extension of the bolt 5. The holding plate 4 is provided with a projection 4a integrally provided, and the projection 4a is engaged with the slip stoppers 1a and 1b to enable stable fixing. A supporting portion 4b is provided at the other end of the holding plate 4 with respect to the protruding portion 4a, and the width of the supporting portion 4b in the vertical direction is prevented from slipping.
1b is set substantially equal to the vertical width. Therefore, when the holding plate 4 is fixed by the bolts 5 and the nuts 6 to hold the slip stoppers 1a and 1b, the holding plate 4 can be stably fixed in the horizontal direction without tilting the holding plate 4 in an oblique direction. .

The engagement between the slip stoppers 1a, 1b and the projection 4a has a resistance to horizontal stress, while the holding plate 4 presses the slip stoppers 1a, 1b. Therefore, the slip stoppers 1a and 1b can be stably fixed as a result.

A culvert is also called a culvert, and is particularly called a culvert when a water channel for water supply and drainage is buried under a road, a railroad, a dike, or the like. Types of culverts include culverts made of pottery pipes and reinforced concrete pipes and stone and reinforced concrete like box culverts and arch culverts. The box culvert has a rectangular cross section, and the arch culvert uses an arch for the cross section.

When the culvert is immersed in water or in the sea and connected by the flexible joint 1, it is performed based on the following steps.

That is, as a first step, one end of a flexible joint is joined to the flexible joint fixing portion of one culvert on land.

Next, as a second stage, as shown in FIG.
A culvert 10a in which one end of the flexible joint 1 is fixed to the flexible joint fixing portion is immersed in a predetermined position in seawater, and the other culvert to be connected is connected near the immersed culvert 10a. Sink 10b next to culvert 10a that was sunk earlier. At this time, the flexible joint 1 is partially climbed on the culvert 10b or bent downward.

As shown in FIG. 4, the holding plate 4 of the culvert 10b, which has been sunk later, is temporarily opened in such a size that the stopper portion 1b provided at the end of the flexible joint 1 can enter naturally. It has been stopped. At this time, the slip stopper 1a provided at one end of the flexible joint 1 is held down by a holding plate 4 provided on the culvert 10a which has been sunk earlier. It is fixed with a nut 6. The distance D between the left end of the bolt 5 installed on one culvert 10a and the right end of the bolt 5 installed on the other culvert 10b can be appropriately set to a predetermined distance to which a pair of culverts are connected. .

FIG. 5 is a diagram for explaining the temporary fixing state shown in FIG. 4 in detail. Bolts 5 are provided upright in a substantially vertical direction on a mounting surface 11 on which the flexible joint 1 is mounted, which is located at an end of the culvert 10b. The holding plate 4 is temporarily fixed at a position wider than the other slip stopper 1b of the flexible joint. Below the holding plate 4, there is a protrusion 4a provided integrally with the holding plate 4, and a distance C from the lower end of the protrusion 4a to the mounting surface 11 of the culvert 10b and the mounting portion 11 are placed on the mounting surface 11. From the lower end of the flexible joint 1 to the flexible joint 1
Comparing with the distance h to the upper end of the slip stopper, C>
h. Since the relationship C> h is satisfied, the slip stopper 1 provided at the end of the flexible joint 1
This makes it easy to insert b into the opening formed by the holding plate 4 and the mounting surface 11 kept in the temporarily fixed state.

The protrusion 4 provided at the tip of the holding plate 4
The slip stopper 1b provided at the end of the flexible joint 1 is located in a range δ from the tip of “a” to the tip of the mounting surface 11. That is, the protruding portion 4 provided below the holding plate 4
The shift preventing portion 1b is located in the right direction in the drawing with respect to the front end portion of FIG. Since the slip prevention portion 1b exists in the range δ, the slip prevention portion 1b slides along the mounting surface 11, and the slip prevention portion 1b is formed by the holding plate 4 and the mounting surface 11 which are maintained in a temporarily fixed state. To facilitate insertion into the opening.

The holding plate 4 is provided with a hole 4c through which the bolt 5 can be penetrated, and the hole 4c has an elliptical slot shape in cross section. Since the cross-sectional shape of the hole 4c is an elliptical long hole, even when the holding plate 4 is inclined with respect to the mounting surface 11, the position where the holding plate 4 is opened wider than the slip preventing portion 1b. Can be temporarily stopped.

The natural length B, which is the length of the flexible joint 1 in the natural state, is longer than the length of the flexible joint fixing part of one culvert 10a and the flexible joint fixing part of the other culvert 10b. Is set. That is, the flexible joint 1
Is set to be longer than the distance D between the left end of the bolt 5 installed on one culvert 10a and the right end of the bolt 5 installed on the other culvert 10b,
B> D. Since the relation of B> D is set, by placing the end of the flexible joint 1 on the mounting surface 11, it is possible to easily insert the slip stopper 1b into the opening by the elastic force of the flexible joint. It becomes.

The temporary fixing of the holding plate 4 is inclined with respect to the mounting surface 11 by using the wire 12 as a linear material, so that the holding plate 4 is wider than the slip preventing portion 1b of the flexible joint 1. It is possible to fix to. The protruding portion 4 a is provided below the holding plate 4, but the wire 12 is used to surround the boundary between the protruding portion 4 a and the holding plate 4 and the upper end of the nut 6, and the holding plate 4 is used. 4 can be temporarily fixed. On the other hand, as shown in FIG. 6, a pair of notches 4d, 4d are provided at the front end of the holding plate 4 so as to correspond to the respective bolts 5, and between the pair of notches 4d, 4d. Is provided with a hook 4e. It is also possible to temporarily fix the holding plate 4 with the wire 12 so as to surround the hook portion 4 e and the bolt 5. FIG. 6 is a view of the holding plate 4 as viewed from above in the vertical direction. The wire 12 may be a synthetic fiber or other linear material,
The material is not particularly limited as long as it is easy to handle.

As a third step, after the slip stopper 1b provided at the end of the flexible joint 1 has penetrated into the opening, the temporarily fixed wire 12 is cut by an existing cutting means such as a cutter. Thus, the temporary fixing can be released, and as a result, the slip stoppers 1a, 1b provided at both ends of the flexible joint can be released.
Is connected to the pair of flexible joint fixing portions.

When the culvert is immersed in water or the sea and connected by the flexible joint 1, it is possible to carry out the following steps.

As the first step, the culverts 10a, 10
The bolts 5 are erected on the respective mounting surfaces 11 of b, and the holding plate 4 is attached to the erected bolts 5 while penetrating the holes 4c. The retaining plate 1 has a retaining plate 1
A projection 4a is provided for fixing a, 1b.
After the holding plate 4 is attached to the bolt 5 while penetrating the hole 4c, a nut 6 screwed to the bolt 5 is fitted. The holding plate 4 is temporarily fixed so as to be inclined with respect to the mounting surface 11 to form an opening. Temporarily fixing the holding plate 4 can be performed by using fixing means such as a wire. In this way, temporarily hold down the holding plate 4 on land,
Then, as shown in FIG. 7, it is immersed in water or the sea.

Next, as a second step, the connection of the flexible joint 1 to the flexible joint fixing portion is performed underwater or in the sea. That is, as shown in FIG. 8, underwater or in the sea, the slip stopper 1 provided at one end of the flexible joint 1 is provided.
b, the mounting surface 11 of the culvert 10b and its mounting surface 11
Is inserted into the opening with the holding plate 4 which is temporarily fixed and inclined. Then, the stopper portion 1b is pressed by the pressing plate 4, and the pressing plate 4 is fixed by the nut 6 screwed to the bolt 5. Then, the slip preventing portion 1a provided at the other end of the flexible joint 1 is formed by opening the mounting surface 11 of the culvert 10a and the holding plate 4 which is temporarily fixed to the mounting surface 11 so as to be inclined. Insert The natural length B, which is the length of the flexible joint 1 in the natural state, is defined by the flexible joint fixing portion of one culvert 10a and the other culvert 10b.
The length of the flexible joint 1 is set to be equal to or greater than the length of the flexible joint, so that the slip preventing portion 1a provided at the other end of the flexible joint 1 The elastic force of the joint allows the slip stopper 1a to be easily inserted into the opening. After the slip stopper 1a is inserted into the opening, the slip stopper 1a is pressed by the holding plate 4, and the holding plate 4 is fixed by the nut 6 screwed to the bolt 5.

As another embodiment of the flexible joint 1, notches 1c and 1d can be provided at both ends of the flexible joint 1 as shown in FIG. The cut portions 1c and 1d have cut openings so that the bolts 5 erected on the culverts 10a and 10b can be received from the outside. Using this flexible joint 1,
The connection of the pair of culverts 10a and 10b can be performed as described below. That is,
A pair of culverts 10 immersed in water or in the sea
First, a notch 1c provided at one end of the flexible joint 1 is fitted from a horizontal direction to a bolt 5 provided upright on the mounting surface 11 of the culvert 10b with respect to a and 10b. The work of fitting the notch 1c into the bolt 5 is performed even if the work is performed underwater or in the sea.
In addition, since it is only necessary to adjust the opening of the cut portion 1c from a substantially horizontal direction, it can be performed relatively easily. After the notch 1 c is fitted into the bolt 5, the end of the flexible joint 1 is pressed by the pressing plate 4. Then, the holding plate 4 is fixed by a nut 6 screwed to the bolt 5. In this manner, the flexible joint 1 is attached to the flexible joint fixing portion of the culvert 10b.
Can be fixed at one end. After that, the notch 1d provided at the other end of the flexible joint 1 is fitted into the bolt 5 erected on the mounting surface 11 of the culvert 10a from the horizontal direction. After fitting the notch 1d into the bolt 5,
The end of the flexible joint 1 is held by the holding plate 4, and the holding plate 4 is fixed by the nut 6 screwed to the bolt 5. In this way, as shown in FIG. 10, the other end of the flexible joint 1 can be fixed to the flexible joint fixing portion of the culvert 10a.

It should be understood that the embodiments disclosed this time are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

[0043]

By using the method for mounting a flexible joint according to the present invention, the work load when joining a pair of culverts, culverts and the like using the flexible joint is greatly reduced, and the flexible joint is installed. A dramatic improvement in installation efficiency was achieved. In particular, the burden of the joining operation when joining a pair of culverts, culverts, etc. underwater using a flexible joint could be considerably reduced.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a flexible joint used in a method for mounting a flexible joint according to the present invention.

FIG. 2 is a diagram illustrating a state in which a flexible joint is fixed to a flexible joint fixing portion of a culvert.

FIG. 3 is a diagram illustrating a process of connecting a flexible joint to a pair of culverts.

FIG. 4 is a diagram illustrating a process of connecting a flexible joint to a pair of culverts.

FIG. 5 is a diagram illustrating a process of connecting a flexible joint to a pair of culverts.

FIG. 6 is a diagram illustrating a holding plate from a vertical direction.

FIG. 7 is a diagram illustrating a process of connecting a flexible joint to a pair of culverts.

FIG. 8 is a diagram illustrating a process of connecting a flexible joint to a pair of culverts.

FIG. 9 is a view illustrating a flexible joint used in the method for attaching a flexible joint according to the present invention.

FIG. 10 is a diagram illustrating a state in which a pair of culverts are connected by a flexible joint.

FIG. 11 is a diagram illustrating a conventional process of connecting a flexible joint to a pair of culverts.

FIG. 12 is a diagram illustrating a conventional process of connecting a flexible joint to a pair of culverts.

FIG. 13 is a diagram illustrating a conventional state in which a flexible joint is connected to a pair of culverts.

[Explanation of symbols]

1 Flexible joint, 1a, 1b Slip stopper, 1c, 1d
Notch, 2 reinforcing fiber layer, 3 high hardness rubber, 4 holding plate, 4a projection, 4b support, 4c hole, 4d
Notch, 4e hook, 5 bolt, 6 nut, 8 anchor bolt, 9 hanging means, 10
Culvert, 11 mounting surface, 12 wires.

Claims (6)

[Claims] 1. A method of attaching a flexible joint to a pair of culverts to be connected, wherein the flexible joint has a hump-shaped slip-stop portion at both ends. A flexible joint fixing portion having a holding member for holding the slip stopper and a fixing member for fixing the holding member, wherein the holding member is located at a position wider than the slip stopper of the flexible joint. By temporarily fixing, an opening is formed. One of the slip stoppers of the flexible joint is attached to a flexible joint fixing portion of one of the culverts. A flexible joint mounting method comprising: inserting the temporary fixing member into the flexible joint, releasing the temporary fixing, pressing the other stopper portion of the flexible joint with a pressing member, and fixing the pressing member with the fixing member. 2. The holding member is a holding plate having a hole, the fixing member includes a bolt and a nut, and the hole is capable of penetrating the bolt, and has a cross-sectional shape of the hole. The method according to claim 1, wherein は is an elliptical slot. 3. The natural length of the flexible joint in a natural state, which is equal to or greater than the distance between the flexible joint fixing part of one culvert and the flexible joint fixing part of the other culvert. 2. The method for mounting a flexible joint according to 2. 4. The temporary fixing is performed by temporarily fixing the holding member of the culvert with a linear material at a position that is wider than the slip preventing portion of the flexible joint, and the temporary fixing is released. The method for mounting a flexible joint according to any one of claims 1 to 3, wherein the method is performed by cutting the temporarily fixed linear material. 5. The method for mounting a flexible joint according to claim 1, wherein the slip preventing portion of the flexible joint has a high hardness rubber portion therein. 6. A method of attaching a flexible joint to a pair of culverts to be connected, wherein the flexible joint has cutouts at both ends, and the culvert includes the flexible joint. A flexible joint fixing portion having a pressing plate for pressing the end of the culvert, a bolt capable of passing through the cut portion, and a nut screwed to the bolt and fixing the pressing plate. After attaching one end of the flexible joint to the flexible joint fixing portion, attaching the other end of the flexible joint to the flexible joint fixing portion of the other culvert. .