JP5172193B2 - How to repair the U-shaped groove - Google Patents

Description

  The present invention relates to a method for repairing a U-shaped groove embedded and installed along a road side or across a road.

  The U-shaped groove installed under the ground suffers from noise problems due to rattling, becomes obsolete over time, decreases in strength, or is exposed to the ground or lid receiving part Therefore, it is necessary to repair the U-groove that generates such noise and the lid receiving portion of the old U-groove. The conventional U-shaped groove cover has a thickness of about 100 mm and a weight of about 45 kg. Therefore, the lid is quite heavy, and it is extremely difficult to attach and detach the lid when cleaning the inside of the side groove. Therefore, there is also a demand to replace such an existing lid with a noise prevention type or a thin lightweight lid.

Patent Document 1 below discloses a lightweight thin lid for replacing an existing lid. FIG. 14 is a cross-sectional view in the vicinity of a lid receiving portion for explaining a conventional method of refurbishing a light-weight lid attached to an aged side groove. The existing lid (not shown) of the existing U-shaped groove embedded in the ground is removed, and the missing portion of the lid receiving portion (consisting of the lid receiving surface 1a and the vertical wall 1b) is repaired. Reference numeral 21 denotes such a repair portion, which is obtained by applying an appropriate repair material such as mortar and finishing with a trowel. Thereafter, the lid 20 that is thinner and lighter than the conventional lid is attached. The lid 20 is made of resin concrete and has high bending strength, and leg portions 20a (such as square pipes) are provided on both sides of the lower surface.
Further, when repairing the lid receiving portion, there is a method in which the lid receiving surface 1a is raised to the height of the leg portion 20a with mortar or the like and a lid having no leg portion is attached.
Also, remove the U-groove near the lid receiving part, for example, the part above line X in FIG. 14 by cutting with a cutter, assemble a formwork, pour concrete into the site, recreate the removed part, There is also a method to attach a simple lid.
Registered Utility Model Publication No. 3108053

The above-described method of attaching the lid with the leg portion 20a after repairing the lid receiving portion is troublesome in the repair work and cannot be attached until the repair portion is dried and develops strength. There is a problem that a considerable work period is required and a lid with a leg portion 20a must be specially manufactured.
The above-described method of raising the lid receiving surface 1a to the height of the leg 20a with mortar or the like is troublesome to raise the height with the mortar or the like, and attaches the lid until the portion is dried and develops strength. However, there is a problem that it takes a considerable work period.
The above-mentioned method of removing the U-groove cover receiving part and recreating it requires a considerable work period because the reworking process is more troublesome and the reworked part is dry and the cover cannot be mounted until strength is developed. In addition, there is a problem that concrete waste is generated.
Even if the shape of the existing side groove is restored by any of the above methods, the destruction of the side groove and the cover due to rattling of the lid is not improved, and there is a situation in which equivalent repair work is repeated.
In addition, none of the above methods can improve the strength of the aging U-shaped groove. That is, when a vehicle passes near the U-shaped groove, the load of the vehicle acts on the U-shaped groove together with earth pressure, and the side wall of the U-shaped groove is tilted inward, and this is repeated, thereby destroying the side wall. There is a risk.

The present invention eliminates the repair of the lid receiving portion of the existing U-shaped groove, so that there is no concrete waste generated at the time of repair, a new lightweight lid can be easily attached, and the construction period on site can be shortened. This is a problem.
Another object of the present invention is to improve the strength of an aged U-shaped groove.

The present invention is a method for repairing a U-shaped groove in which a new lid is mounted instead of the existing lid of an existing U-shaped groove, and the new lid is formed in a frame-shaped primary lid and an opening of the primary lid. Ri Do from detachable secondary lid, without ablating the top of an existing U-shaped grooves, the primary lid is attached to the existing lid receiving portion of the existing U-shaped grooves, characterized by Rukoto bonded and integrated This is a method of repairing the U-shaped groove.

In addition, the present invention is a combination in which two lid receiving members facing each other in parallel at a predetermined interval are temporarily integrated without temporarily cutting an upper portion of an existing U-shaped groove by temporarily fastening a connecting member in the width direction. existing lid receiving member, attached to the existing lid receiving section of the existing U-shaped grooves, after bonding integrated with the lid receiving the coupling cap receiving member, detaching the coupling member, to the two cover receiving member A method for repairing a U-shaped groove, characterized in that a new lid thinner than the lid is attached.

Since the present invention uses a lid that is thinner than the existing lid, the lid is reduced in weight, and the operation of attaching and detaching the lid is facilitated when cleaning the inside of the side groove.
Since there is no need to repair the existing U-shaped groove lid receiving part, the work at the site becomes easy, the concrete waste is eliminated, and the construction period can be shortened.
Since the connecting member of the primary lid acts as a cross beam, the strength of the existing U-shaped groove is improved, and the side wall of the existing U-shaped groove can be prevented from tilting inward.
As the secondary lid, it is possible to easily use a lid that does not generate noise, and it is possible to prevent the lid from ringing when the vehicle passes over the lid.
When the hanging wall is provided on the lid receiving member, even if the corner of the lid receiving surface of the U-shaped groove is missing, it is possible to easily inject the adhesive without providing a skirting plate.

  In the present invention, it is desirable to use a secondary lid that is thinner and lighter than existing lids.

In the present invention, the primary lid, bonded and integrated to the lid receiving section of the existing U-shaped grooves. As the adhesive, any adhesive such as inorganic adhesives such as mortar and cement milk, and resin adhesives such as epoxy resins can be used. By bonding and integrating the primary lid and the lid receiving portion of the existing U-shaped groove, the existing U-shaped groove is strengthened. That is, when earth pressure / loading load acts on the side wall of the U-shaped groove, the connecting member of the primary lid acts as a transverse beam to counteract earth pressure / loading load and prevent the side wall of the U-shaped groove from inclining inward. The adhesive may be applied to the lid receiving part of the U-shaped groove before mounting the primary lid, or may be injected after mounting the primary lid.

  In the present invention, the primary lid is composed of two lid receiving members facing each other in parallel at a predetermined interval, and a connecting member in the width direction connecting the two lid receiving members, and the whole is integrally made of concrete. It can be molded. In this case, it is possible to easily use a secondary lid that does not generate noise by making a portion of the lid receiving member of the primary lid contacting the secondary lid into a noise prevention shape such as a curved surface.

  The primary lid includes two lid receiving members facing each other in parallel at a predetermined interval and a connecting member in the width direction for connecting the two lid receiving members, and the whole is integrally formed of metal. It can also be assumed. When the primary lid is made of metal, the weight can be reduced, and the work at the site becomes easier.

  In the present invention, the lid receiving member can be provided with a hanging wall formed downward from the inside of the lid receiving surface. Thereby, even if the corner | angular of the lid | cover receiving surface of a U-shaped groove | channel is missing, injection | pouring of an adhesive agent can be performed easily, without providing a skirting board.

  Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments. 1 is a perspective view showing an example of a primary lid 2 and a secondary lid 5 made of concrete, FIG. 2 is a cross-sectional view of the primary lid 2 of FIG. 1 attached to an existing U-shaped groove 1, and FIG. FIG. 4 is a cross-sectional view of the main part of the primary lid 2 attached to the existing U-shaped groove 1, FIG. 5 is a perspective view of the secondary lid 5 of FIG. 1, and FIG. 7 is a cross-sectional view of the lid 5, FIG. 7 is a detailed explanatory view of a mounting portion of the secondary lid 5, FIGS. 8 and 9 are plan views showing other examples of the concrete primary lid, and FIG. 10 is a metal primary lid 2 and a coupling lid receiving member. FIG. 11 is a cross-sectional view in which the primary lid 2 of FIG. 10 is mounted in the existing U-shaped groove 1, and FIG. 12 is a cross-sectional view of the main part in which the metal primary lid 2 is mounted in the existing U-shaped groove 1. FIG. 13 is a cross-sectional view of a main part of another example of the primary cover made of concrete.

  The primary lid 2 shown in FIGS. 1 to 4 and 7 is made of concrete and integrally formed, and includes two lid receiving members 3 facing each other in parallel at a predetermined interval, and the two lid receiving members 3. It consists of a connecting member 4 in the width direction to be connected, the whole is a quadrilateral shape, and the central part is an opening for mounting two secondary lids 5. After removing the existing lid of the existing U-shaped groove 1 and cleaning the lid receiving portion, the primary lid is continuously attached to the lid receiving portion of the existing U-shaped groove 1 as shown in FIGS. . A secondary lid 5 shown in FIGS. 1 to 7 is detachably attached to the opening of the primary lid 2. The secondary lid 5 is preferably made of resin concrete or fiber reinforced concrete, but may be made of ductile cast iron or steel grating. Since resin concrete has bending strength and tensile strength, the lid thickness can be reduced to obtain the required strength. In addition, the resin concrete can control the pot life, exhibits high strength at an early stage, and is excellent in adhesion, water tightness, freeze-thaw resistance, chemical resistance, wear resistance, electrical insulation, and the like. Fiber reinforced concrete is obtained by dispersing fibers such as glass fiber, steel fiber, and carbon fiber in concrete. Since the fiber reinforced concrete also has bending strength and tensile strength, the thickness of the lid can be reduced. By doing in this way, the thickness and the weight of the secondary lid 5 can be reduced to about 1/2 to 1/3 of the existing lid. Therefore, it is possible to facilitate the attaching / detaching operation of the lid at the time of cleaning the U-shaped groove. The secondary lid 5 is formed with a large number of slits 6 for inflow of rainwater and as a clue when removing the lid.

  FIG. 7 shows the relationship between the lid receiving surface of the lid receiving member 3 of the primary lid and the secondary lid 5. The lid receiving surface 3a of the lid receiving member 3 and the contact surface portion 8 of the secondary lid 5 are both curved, and the curvature center O1 of the lid receiving surface 3a and the curvature center O2 of the contact surface portion 8 of the secondary lid are slight. (0.1 to 0.5 mm) apart. The curved surface of the contact surface portion 8 of the secondary lid 5 is formed from the perpendicular to the angle α with respect to O1 (center of curvature of the lid receiving surface 3a of the lid receiving member 3) over the angle β. α is provided for the purpose of providing a protrusion 10 for preventing the secondary lid from jumping up, and about 30 ° to 35 ° is appropriate. When no projection is provided, it may be 0 °. α + β is suitably 60 °. The upper end portion of the contact surface portion 8 is a junction point 9 (a portion that comes into contact with the lid receiving surface 3a when the secondary lid is attached), and the upper portion thereof is slightly bent at the junction point 9 so as not to interfere with the lid receiving member 3. After a straight line. The lid receiving surface 3a may be designed so as to come into contact with the contact surface portion 8 of the lid with as large an area as possible when a load is applied. As shown in FIG. 7, it is preferable to shift O2 slightly outward and upward of O1. Moreover, when the curvature radius of the lid | cover receiving surface 3a and the contact surface part 8 shall be 11-25 mm, the bending strength when a load load acts on a secondary lid becomes large, and it is preferable. In FIG. 7, the distance between O1 and O2 and the distance between the curved surface of the lid receiving member and the secondary lid are emphasized.

  FIG. 7 shows a linear shape in which the secondary lid is attached to the primary lid (no load), and the lid receiving member 3 and the secondary lid 5 are in contact with each other at the junction 9 at the end of the contact surface portion 8. Contact. When a load is applied to this, the secondary lid is slightly deformed, the lid receiving surface 3a and the contact surface portion 8 are brought into surface contact, the contact area is widened, and the force acting on the secondary lid is effectively applied to the primary lid. Is transmitted to.

  The secondary lid 5 is a noiseless lid that is in line contact when mounted on the primary lid (no load) and does not ring when the vehicle passes over the lid.

  As shown in FIG. 4, an adhesive 13 is filled between the lid receiving portion of the U-shaped groove 1 and the primary lid 2. In this case, the adhesive is injected from the gap indicated by the arrow A. As shown in the figure, when the corners of the U-groove lid receiving surface are missing, the slat plate 14 is used as necessary to prevent the adhesive from leaking. Temporarily fixing the dam plate 14 using a known method such as temporarily fixing the U-shaped groove side wall with an adhesive, concrete nails or the like, or suspending a tension rod or turnbuckle between the opposing side wall inner surfaces. And removed after completion of the injection operation.

  The shape of the primary lid 2 is not necessarily a quadrilateral shape. The primary lid 2 in FIG. 8 is entirely made of concrete, and the intermediate portions of two parallel lid receiving members 3 are connected by two connecting members 4. Two secondary lids are attached to the central opening, and one secondary lid is attached to each of the openings on both sides.

  The primary lid 2 in FIG. 9 is entirely made of concrete, and the central portions of two parallel lid receiving members 3 are connected by one connecting member 4. One secondary lid is attached to each of the openings on both sides.

  FIG. 10 shows an example of a metal primary lid 2. The primary lid 2 shown in the figure is manufactured by processing a steel plate, and two lid receiving members 3 facing each other in parallel at a predetermined interval, and a width direction connecting the two lid receiving members 3. The connecting member 4 is formed in a quadrilateral shape, and the central portion is an opening for mounting two secondary lids 5. A lid receiving surface 3a is formed on the lid receiving member 3, and two foot portions 11 for height adjustment are formed on the lower surface thereof. Further, a hanging wall 7 is formed on the inner side of the lid receiving surface 3a. After removing the existing lid of the existing U-shaped groove 1 and cleaning the lid receiving portion, the primary lid is continuously mounted on the lid receiving portion of the existing U-shaped groove 1 as shown in FIG. When the primary lid is mounted, the foot portion 11 is placed on the lid receiving surface of the U-shaped groove 1. As shown in FIGS. 11 and 12, the secondary lid 5 having a thickness of about 1/2 to 1/3 of the existing lid is detachably attached to the opening of the primary lid 2. The secondary lid 5 is preferably made of resin concrete or fiber reinforced concrete, but may be made of ductile cast iron or steel grating. In this case, the cover receiving surface 3a is formed in a flat surface, and the contact surface portion of the secondary cover 5 is also a flat surface. However, the cover receiving surface 3a as shown in the above embodiment has a noise prevention type structure such as a curved surface. It is also possible to use a noiseless lid.

  As shown in FIG. 12, an adhesive 13 is filled between the lid receiving portion of the U-shaped groove 1 and the primary lid 2. In this case, the adhesive is injected from the gap indicated by the arrow A. Since the drooping wall 7 is formed in the primary lid 2, even if the corner of the lid receiving surface of the U-shaped groove is missing, it is not necessary to use a dam plate as shown in FIG.

  In FIG. 10, when the connecting member 4 is temporarily fastened to the lid receiving members 3 on both sides, a combined lid receiving member 12 of the present invention is obtained. Temporary fastening is a fastening method that can be easily removed, such as spot welding or bolting at an appropriate interval. In that case, after attaching the coupling lid receiving member 12 to the lid receiving portion of the U-shaped groove and fixing with the adhesive, the connecting member 4 is removed, and then the secondary lid is supported by the lid receiving members on both sides and attached. . The state in which the secondary lid is attached is the same as that shown in FIG. 12 (the only difference is that there is no connecting member 4). The connecting member 4 acts as a ruler for attaching the lid receiving member to the U-groove lid receiving portion at a predetermined interval.

  The hanging wall 7 can also be provided on a primary cover made of concrete. FIG. 13 shows an example in which a hanging wall 7 is suspended from the inner side of the lid receiving surface 3a of the lid receiving member 3 of the concrete primary lid. Thereby, even when the corner of the lid receiving surface of the U-shaped groove is missing, it is not necessary to use a dam plate as shown in FIG.

  In the present invention, the material of the secondary lid is not limited to concrete, and various materials such as metal (for example, steel plate, cast iron), wood, plastic, and combinations thereof can be used. When a noiseless lid is used as the secondary lid, not only the types shown in the embodiments but also various known types can be used. Moreover, grating can also be employ | adopted as a secondary cover. The number of secondary lids attached to one primary lid is arbitrary, and can be freely designed to attach a desired number of lids.

2 is a perspective view showing an example of a concrete primary lid 2 and a secondary lid 5. FIG. FIG. 2 is a cross-sectional view in which the primary lid 2 of FIG. 1 is mounted in an existing U-shaped groove 1. It is the top view which attached the primary lid 2 to the existing U-shaped groove 1. FIG. FIG. 3 is a cross-sectional view of a main part in which a primary lid 2 is attached to an existing U-shaped groove 1. 3 is a perspective view of a secondary lid 5. FIG. 3 is a cross-sectional view of a secondary lid 5. FIG. It is a detailed explanatory view of a mounting portion of the secondary lid. It is a top view which shows the other examples of a concrete primary lid. It is a top view which shows the other examples of a concrete primary lid. It is a perspective view which shows the example of the metal primary lids 2 and the coupling lid receiving member 12. FIG. It is sectional drawing which mounted | wore the existing U-shaped groove | channel 1 with the primary lid 2 of FIG. FIG. 2 is a cross-sectional view of a main part in which a metal primary lid 2 is attached to an existing U-shaped groove 1. It is principal part sectional drawing of the other example of a concrete primary cover. It is explanatory drawing of the conventional U-shaped groove repair method.

Explanation of symbols

Reference Signs List 1 U-shaped groove 2 Primary lid 3 Lid receiving member 3a Lid receiving surface 4 Connecting member 5 Secondary lid 6 Slit 7 Hanging wall 8 Contact surface 9 Joint point 10 Protrusion 11 Base foot 12 Bonding lid receiving member 13 Adhesive 14 Cough Plate 20 Lid 21 Repair Department

Claims (7)

A method of repairing a U-shaped groove in which a new lid is mounted instead of an existing lid of an existing U-shaped groove, wherein the new lid is detachable from a frame-shaped primary lid and an opening of the primary lid. Ri Do the following lid, existing U-without ablating the top of the groove, the primary lid is attached to the existing lid receiving portion of the existing U-shaped grooves, the U-shaped groove, characterized in Rukoto bonded and integrated Renovation method.   2. The repairing method according to claim 1, wherein the secondary lid is thinner than the existing lid. The refurbishing method according to claim 1 or 2 , wherein the primary lid includes two lid receiving members facing each other in parallel at a predetermined interval, and a connecting member in a width direction for connecting the two lid receiving members. A method for repairing a U-shaped groove, characterized in that the whole is integrally formed of concrete. The refurbishing method according to claim 1 or 2 , wherein the primary lid includes two lid receiving members facing each other in parallel at a predetermined interval, and a connecting member in a width direction for connecting the two lid receiving members. A method for repairing a U-shaped groove, characterized in that the whole is integrally formed of metal. In renovation method of claim 3 or 4, wherein the cover receiving member is, refurbishment method of the U-shaped groove, characterized in that from the inside of the lid receiving surface and has a hanging wall formed below. Without cutting off the upper part of the existing U-shaped groove, a combined lid receiving member that is temporarily integrated with two lid receiving members facing each other in parallel with a predetermined interval by temporarily fastening a connecting member in the width direction, After attaching to the existing lid receiving part of the existing U-shaped groove and bonding and integrating the lid receiving part and the coupling lid receiving member, the connecting member is removed, and the two lid receiving members are newly thinner than the existing lid A method of repairing a U-shaped groove, characterized by attaching a lid. 7. The repair method according to claim 6 , wherein the lid receiving member has a hanging wall formed downward from the inside of the lid receiving surface.

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