JP2021011762A - Repair method of existing side ditch and concrete lid member for repair of existing side ditch - Google Patents

Abstract

To provide a repair method of an existing side ditch and a concrete lid member for repairing an existing side ditch, which can improve the workability of the repair of the lid part of existing side ditch while controlling the increase in construction period and cost.SOLUTION: There is provided a concrete lid member 1 to be mounted on a lid receiving portion 65 comprising a pair of upper surface portions 63 and 64 opposite to each other and extending in a longitudinal direction of an existing side ditch main body 62 from which an existing lid is removed. There is also provided a repair method of an existing side ditch comprising: a lid member preparation step for preparing the lid member 1 including inclined surfaces 41, 41 that are inclined outward on both side surfaces 4, 4 in a longitudinal direction, and have an upper surface width smaller than a lower surface width; and a width adjusting step for cutting a lower part of the side surface of the lid member 1 when the width of the prepared lid member 1 is larger than a width of the lid receiving portion 65.SELECTED DRAWING: Figure 11

Description

The present invention relates to a method for repairing an existing gutter and a concrete lid member for repairing an existing gutter.

Conventionally, a lid made of concrete or the like is arranged in the upper opening portion of the gutter (for example, U-shaped gutter, gate-shaped gutter, etc.). The gutter structure including the lid is deformed or damaged due to vibration due to passing by a vehicle or the like, a heavy load, and aged deterioration. It is necessary to repair the gutter structure (particularly the lid) that is damaged or may be damaged.
Various methods have been proposed for repairing gutter structures including lids. Recently, a method of repairing (replacing) only the lid portion instead of replacing the entire gutter structure has been proposed. For example, in order to place a new lid after cutting the damaged upper part of the existing gutter (Japanese Patent Laid-Open No. 2006-322138, JP-A-2011-219960, JP-A-2012-149513, etc.) or to place a new lid. (Japanese Patent Laid-Open No. 2007-239315, Japanese Patent Application Laid-Open No. 2008-031728, etc.) and those for producing a lid portion on site (Japanese Patent Laid-Open No. 2018-080559, etc.).

In recent years, there has been a demand for reducing the workload (improving workability) at the site due to a shortage of craftsmen, etc. Therefore, there is a strong demand for a shift to the precast method (a method in which concrete products are manufactured in advance at a dedicated factory and then transported to the site for installation).
Here, in Patent Document 1 (Japanese Patent Laid-Open No. 2011-080306), it is not necessary to replace the entire side groove, the existing side groove lid is removed, the lid receiving portion of the existing side groove is confirmed, and the width direction length is the lid receiving of the existing side groove. Preparation of the new side groove lid shorter than the part, placement of the new side groove lid on the lid receiving part of the existing side groove, injection of filler between the lid receiving part and the new side groove lid, and the new road surface on the upper surface of the new side groove lid A precast method is disclosed, which includes work such as laying a water-permeable paving material to make it flush.
However, this requires a considerably long construction period of at least 3 weeks because the structure is measured after removing the existing gutter lid to create a new gutter lid.
In addition, the deformation and damage of the existing gutters are not uniform, and depending on the size setting of the new gutter lid, some of the new gutter lids cannot be placed on the lid receiving part, or between the lid receiving part and the new gutter lid. Problems such as the gap being too large occur. On the other hand, it is not realistic from the viewpoint of cost to prepare a plurality of types of new gutter lids in order to cope with deformation or breakage of the existing gutters that are not uniform.

Japanese Unexamined Patent Publication No. 2011-080306

Therefore, the present invention relates to a method for repairing an existing gutter and a concrete lid member for repairing an existing gutter, which can improve workability while suppressing an increase in construction period and cost for repairing the lid portion of the existing gutter. Is to provide.

Those that achieve the above objectives are as follows.
(1) This is a method for repairing existing gutters.
The method of repairing the existing gutter is
It is a concrete lid member that extends in the longitudinal direction of the existing side groove body from which the existing lid has been removed and is placed on a lid receiving portion consisting of a pair of upper surface portions facing each other, and faces downward on both side surfaces in the longitudinal direction. A lid member preparation step for preparing a concrete lid member for repairing an existing side groove having an inclined surface inclined outward and having an upper surface width smaller than the lower surface width.
A lid member mounting step of mounting the lower surface side of the concrete lid member on the lid receiving portion of the existing gutter body from which the existing lid is removed from the existing gutter.
The filler filling step of filling the filler from the side upper surface side of both side surfaces in the longitudinal direction of the concrete lid member placed on the lid receiving portion is performed.
Further, in the method of repairing the existing gutter, when the width of the prepared concrete lid member is larger than the width of the lid receiving portion of the existing gutter body from which the existing lid is removed, the concrete lid member A method of repairing an existing gutter, which comprises performing a width adjusting step of cutting the lower part of the side surface.

In addition, those that achieve the above objectives are as follows.
(2) This is a method for repairing existing gutters.
The method of repairing the existing gutter is
It is a concrete lid member that extends in the longitudinal direction of the existing side groove body from which the existing lid has been removed and is placed on a lid receiving portion consisting of a pair of upper surface portions facing each other, and faces downward on both side surfaces in the longitudinal direction. A concrete lid member for repairing an existing side groove, which has an inclined surface inclined outward, has an upper surface width smaller than the lower surface width, and further has step portions for a cutting starting point extending in the longitudinal direction of the lid member on both side surfaces. The lid member preparation process to prepare
A lid member mounting step of mounting the lower surface side of the concrete lid member on the lid receiving portion of the existing gutter body from which the existing lid is removed from the existing gutter.
The filler filling step of filling the filler from the side upper surface side of both side surfaces in the longitudinal direction of the concrete lid member placed on the lid receiving portion is performed.
Further, in the method of repairing the existing gutter, when the width of the prepared concrete lid member is larger than the width of the lid receiving portion of the existing gutter body from which the existing lid has been removed, the step portion for the cutting starting point A method for repairing an existing gutter, which comprises performing a width adjusting step of cutting the concrete lid member using the above.

In addition, those that achieve the above objectives are as follows.
(3) A concrete lid member for repairing an existing gutter for mounting on a lid receiving portion consisting of a pair of upper surface portions extending in the longitudinal direction of the existing gutter body from which the existing lid has been removed.
The concrete lid member has an upper surface, a lower surface for mounting on the lid receiving portion of the existing side groove main body, and inclined surfaces inclined outward toward the lower surface on both side surfaces in the longitudinal direction. A concrete lid member for repairing an existing side groove, wherein the upper surface width is smaller than the lower surface width, and further, both side surfaces thereof are provided with a step portion for a cutting starting point extending in the longitudinal direction of the lid member.
(4) The concrete lid member for repairing an existing gutter according to (3) above, which is used in the method for repairing an existing gutter according to claim 1.
(5) The existing gutter according to (3) or (4) above, wherein the concrete lid member has reinforcing bars embedded in a portion other than a portion lower and a side portion than the step portion for cutting starting point. Concrete lid member for repair.
(6) The concrete lid member is provided with a slit hole penetrating in the thickness direction in a central portion in the width direction, and has an inclined surface on the upper surface that is inclined downward toward the slit hole. The concrete lid member for repairing an existing gutter according to any one of (3) to (5).

In the method for repairing an existing side groove of the present invention, a concrete lid member for repairing an existing side groove, which has inclined surfaces inclined downward and outward on both side surfaces in the longitudinal direction and whose upper surface width is smaller than the lower surface width, is prepared. The lid member preparation step, the lid member mounting step of placing the lower surface side of the concrete lid member on the lid receiving portion of the existing side groove main body from which the existing lid is removed from the existing side groove, and the lid receiving portion. The filler filling step of filling the filler from the side upper surface side of both side surfaces in the longitudinal direction of the concrete lid member is performed. Therefore, even if the structure around the existing gutter or the main body of the existing gutter is deformed or damaged, especially when it collapses toward the inside of the existing gutter, the side surface of the lid member and its peripheral members (structures such as roads and the like) A gap that expands upward can be secured between the gutter and the upper side wall of the existing gutter, and a filler (non-shrink mortar or the like) can be poured into the gap. Further, due to the anchor effect between the inclined surface of the concrete lid member and the filler, the lid member can be fixed more firmly, and the lid member can be prevented from falling off or rattling.

Further, the method for repairing an existing side groove of the present invention has a concrete lid member for repairing an existing side groove, which has inclined surfaces inclined outward on both side surfaces in the longitudinal direction and whose upper surface width is smaller than the lower surface width. Width for cutting the lower side surface of the concrete lid member when the width of the prepared concrete lid member is larger than the width of the lid receiving portion of the existing side groove main body from which the existing lid is removed. The adjustment process is performed. Therefore, when the structure around the existing gutter or the existing gutter body is deformed or damaged and the width of the lid receiving portion becomes smaller than the width of the lid member, it is difficult to place the lid member on the lid receiving portion. However, it is possible to adjust the width of the lid member on site. Further, since the lid member has inclined surfaces on both side surfaces in the longitudinal direction, it is easy to insert the blade of the concrete cutter when cutting the lower side surface of the lid member. Further, the portion of the lower side surface of the lid member that needs to be broken may be cut, and the cut portion and the thickness can be reduced as compared with cutting the lid member over the entire length in the thickness direction.

The concrete lid member for repairing an existing gutter of the present invention is a concrete lid member for mounting on a lid receiving portion composed of a pair of upper surface portions extending in the longitudinal direction of the existing gutter main body from which the existing gutter has been removed. It has an upper surface, a lower surface for mounting on the lid receiving portion of the existing gutter body, and both side surfaces in the longitudinal direction, which are inclined surfaces that incline outward toward the lower surface direction, and the upper surface width is larger than the lower surface width. In addition, both sides are provided with step portions for cutting starting points extending in the longitudinal direction of the lid member. For example, in an existing gutter to be repaired, the structure around the existing gutter and the main body of the existing gutter are deformed or damaged, and the width of the lid receiving portion becomes smaller than the width of the lid member, so that the lid member is used as the lid receiving portion. When it is difficult to place the lid member, the lid member may be cut at the site using a concrete cutter (portable concrete cutter) or the like to adjust the width dimension of the lid member. At that time, since the lid member is provided with the step portion for the cutting starting point, it can be used as a dimensional mark when adjusting the width (cutting) of the lid member, or the blade of the concrete cutter can be applied to the step portion for the cutting starting point. Improves workability when repairing existing gutters, such as making it difficult for the blade to shift. Further, the portion of the lower side surface of the lid member that needs to be broken may be cut, and the cut portion and the thickness can be reduced as compared with cutting the lid member over the entire length in the thickness direction.

FIG. 1 is a plan view of a concrete lid member for repairing an existing gutter according to an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the line AA of FIG. FIG. 3 is an enlarged cross-sectional view taken along the line BB of FIG. FIG. 4 is an enlarged explanatory view of part C of FIG. FIG. 5 is a perspective explanatory view showing a state at the time of installation of the existing gutter, which is the target of the method for repairing the existing gutter according to the embodiment of the present invention. FIG. 6 is a cross-sectional explanatory view showing an initial state of installation of the existing gutter, which is the target of the method for repairing the existing gutter according to the embodiment of the present invention. FIG. 7 is a cross-sectional explanatory view showing the existing gutter main body in the state at the time of repairing the existing gutter shown in FIG. FIG. 8 is a cross-sectional explanatory view showing a width adjusting step of a method for repairing an existing gutter according to an embodiment of the present invention. FIG. 9 is a cross-sectional view showing a lid member whose lower side is cut in the process shown in FIG. FIG. 10 is a cross-sectional explanatory view showing a lid member mounting step of the method of repairing an existing gutter according to an embodiment of the present invention. FIG. 11 is a cross-sectional explanatory view showing a filler filling step of the method for repairing an existing gutter according to an embodiment of the present invention. FIG. 12 is a cross-sectional view showing a lid member in which the lower part of the side portion is cut in another example of the width adjusting step of the method of repairing the existing gutter of the embodiment of the present invention. FIG. 13 is an enlarged cross-sectional view of a concrete lid member for repairing an existing gutter according to another embodiment of the present invention. FIG. 14 is an enlarged explanatory view of part D of FIG. FIG. 15 is an enlarged cross-sectional view of a concrete lid member for repairing an existing gutter according to another embodiment of the present invention. FIG. 16 is a cross-sectional explanatory view showing an initial state of installation of another existing gutter that is the target of the method for repairing an existing gutter of the present invention. FIG. 17 is a cross-sectional explanatory view showing the existing gutter main body in the state at the time of repairing the existing gutter shown in FIG. FIG. 18 is a cross-sectional explanatory view showing a repair completed state of the existing gutter shown in FIG.

The method of repairing the existing gutter and the concrete lid member for repairing the existing gutter of the present invention will be described with reference to the examples shown in the drawings. FIG. 1 shows a plan view of a concrete lid member 1 (hereinafter, also simply referred to as a lid member 1) according to the present invention. A cross-sectional view of the lid member 1 is shown in FIGS. 2 and 3, respectively. In the present embodiment, the left-right direction in FIG. 1 is the longitudinal direction of the lid member 1, the vertical direction in FIG. 1 is the width direction of the lid member 1, and the vertical direction in FIG. 3 is the vertical direction of the lid member 1 and the existing side groove. explain.

In the method for repairing the existing side groove of the present invention, the existing side groove main body 62 (see FIG. 7) from which the existing lid 61 has been removed is placed on a lid receiving portion 65 composed of a pair of upper surface portions 63 and 64 extending in the longitudinal direction and facing each other. For repairing an existing side groove, which is a concrete lid member for the purpose, and has inclined surfaces 41 inclined outward on both side surfaces 4 in the longitudinal direction, and the upper surface width: W1 is smaller than the lower surface width: W2. In the lid member preparation step for preparing the concrete lid member (lid member 1), and the lid receiving portion 65 of the existing side groove main body 62 from which the existing lid 61 is removed from the existing side groove 6, the lower surface (3) of the concrete lid member 1 is attached. ) Side is placed, and the filling material 8 is filled from the side upper surface side of both side surfaces 4 in the longitudinal direction of the lid member 1 made of concrete placed on the lid receiving portion 65. It is a process. Further, in the method for repairing the existing gutter of the present invention, when the width of the prepared concrete lid member 1 is larger than the width of the lid receiving portion 65 of the existing gutter main body 62 from which the existing lid 61 is removed: W3, concrete. The width adjusting step of cutting the lower side surface of the lid member 1 made of concrete is performed.

Further, as another embodiment of the method for repairing the existing side groove of the present invention, the existing side groove main body 62 (see FIG. 7) from which the existing lid 61 is removed is composed of a pair of upper surface portions 63, 64 extending in the longitudinal direction and facing each other. It is a concrete lid member for mounting on the lid receiving portion 65, and has inclined surfaces 41 inclined outward on both side surfaces 4 in the longitudinal direction, and the upper surface width: W1 is the lower surface width: A lid member preparation step for preparing a concrete lid member (lid member 1) for repairing an existing side groove, which is smaller than W2 and further has step portions 44 and 45 for cutting starting points extending in the longitudinal direction of the lid member on both side surfaces 4. The lid member mounting step of mounting the lower surface (3) side of the concrete lid member 1 on the lid receiving portion 65 of the existing side groove main body 62 from which the existing lid 61 is removed from the existing side groove 6, and the lid receiving portion 65. The filler filling step of filling the filler 8 from the side upper surface side of both side surfaces 4 in the longitudinal direction of the placed concrete lid member 1 is performed. Further, in the method of repairing the existing gutter, when the width of the prepared concrete lid member 1 is larger than the width of the lid receiving portion 65 of the existing gutter main body 62 from which the existing lid 61 is removed: W3, the step for the cutting starting point. The width adjusting step of cutting the concrete lid member 1 is performed by using the portions 44 and 45.

As shown in FIG. 5, in the existing gutter 6 to be repaired, a plurality of existing gutter main bodies 62 are continuously provided in the longitudinal direction. Each existing gutter body 62 includes a bottom plate portion 66 and side walls 67, 68 extending upward from both side portions of the bottom plate portion 66. As shown in FIG. 6, each existing gutter main body 62 is arranged so as to be sandwiched between structures 90 and 90 such as roads.

A lid receiving portion 65 composed of a pair of upper surface portions 63 and 64 facing each other is formed on the upper portions of the side walls 67 and 68 of the existing gutter main body 62. Specifically, as shown in FIG. 6, the lid receiving portion 65 is formed on the upper end surfaces (upper surface portions 63, 64) of the side walls 67 and 68 surrounded by the inner surfaces of the structures 90 and 90.

As shown in FIG. 5, an existing lid 61 is placed on each of the lid receiving portions 65 of each existing gutter main body 62. In general, the existing lid 61 has both side surfaces 73 and 73 inclined inward so that it can be easily placed on the lid receiving portion 65. At one end of the existing lid 61 in the longitudinal direction, a drainage port forming recess 74 for draining rainwater or the like into the existing gutter main body 62 is provided.

In the method for repairing an existing gutter of the present invention, a lid member preparation step of preparing a lid member having inclined surfaces inclined downward and outward on both side surfaces in the longitudinal direction and having an upper surface width smaller than the lower surface width is performed. .. In the present embodiment, the lid member 1 shown in FIGS. 1 to 4 is prepared. Desirably, both side surfaces 4 in the longitudinal direction have inclined surfaces 41 that incline outward toward the lower surface (downward), the upper surface width: W1 is smaller than the lower surface width: W2, and the lids on both side surfaces 4. A concrete lid member (lid member 1) for repairing an existing gutter having step portions 44 and 45 for cutting starting points extending in the longitudinal direction of the member 1 is prepared.

The lid member 1 is a rectangular plank-shaped member made of concrete. For example, the lid member 1 has a longitudinal dimension of about 1000 mm, a width direction dimension of about 400 to 450 mm, and a thickness (vertical direction dimension) of about 100 mm. As shown in FIG. 1, a large number of vertical ribs 21 projecting upward and long in the longitudinal direction and horizontal ribs 22 projecting upward and long in the width direction are alternately provided on substantially the entire surface of the upper surface 2 of the lid member 1. , These exert a non-slip effect. In drawings other than FIG. 1, the vertical ribs 21 and the horizontal ribs 22 are not shown.

Two slit holes 23 that penetrate the lid member 1 in the thickness direction are provided in the central portion of the lid member 1 in the width direction. The slit hole 23 has an elongated rectangular shape extending in the longitudinal direction in a plan view, and is open to the upper surface 2 and the lower surface 3 of the lid member 1. As shown in FIGS. 2 and 3, the slit hole 23 has a shape that expands downward (so-called reverse funnel shape) so that the earth and sand that flows down together with rainwater does not easily clog the slit hole 23. It has become.

As shown in FIG. 3, the lid member 1 has an inclined surface 24 on the upper surface 2 which is inclined downward toward the slit hole 23. Angle of inclined surface 24 (angle formed by inclined surface 24 and horizontal plane): α is appropriately set according to required drainage performance (displacement amount, water collection efficiency, etc.), but is preferably about 2 °. To. As shown in FIGS. 1 and 3, in the lid member 1, the slit hole 23 is formed long in a direction orthogonal to the inclination direction of the inclined surface 24. Therefore, the slit hole 23 can efficiently receive the water flowing down along the inclined surface 24.

A water collecting groove 25 extending over the entire length in the longitudinal direction and communicating with the slit hole 23 is provided in the central portion of the upper surface 2 of the lid member 1 in the width direction. The water collecting groove 25 has an effect of receiving the water flowing down along the inclined surface 24 and guiding the water to the slit hole 23. The water collecting groove 25 is formed in an appropriate size (width and depth) in consideration of ensuring the strength of the lid member 1 and the ease of passage on the lid member 1.

As shown in FIG. 3, the lid member 1 is provided on the upper surface 2, the lower surface 3 for mounting on the lid receiving portion 65 of the existing gutter main body 62, and the side surfaces 4 and 4 in the longitudinal direction, respectively, in the lower surface direction. It has an inclined surface 41 that inclines outward toward (downward). Further, in the lid member 1, the upper surface width (width direction dimension of the upper surface 2): W1 is smaller than the lower surface width (width direction dimension of the lower surface 3): W2. A V-shaped groove 42 extending over the entire length in the longitudinal direction is provided in the central portion of the inclined surface 41.

As shown in FIG. 3, the lid member 1 includes cutting starting point steps 44 and 45 extending in the longitudinal direction of the lid member 1 on both side surfaces 4 and 4, respectively. In this embodiment, the lid member 1 has a first cutting starting step 44 provided at the side end portion and a second cutting starting step 44 provided inside and above the first cutting starting step 44. It is provided with a portion 45 and has a substantially stepped shape.

More specifically, as shown in FIGS. 3 and 4, a substantially vertical surface 46 extends upward from the side end of the lower surface 3 of the lid member 1, and a substantially horizontal plane 47 extends inward from the upper end of the substantially vertical surface 46. Further, a substantially vertical plane 48 extends upward from the inner end of the substantially horizontal plane 47. A step portion 44 for a first cutting starting point is formed by a substantially horizontal plane 47 and a substantially vertical plane 48. Further, as shown in FIG. 4, a substantially horizontal plane 49 extends inward from the upper end of the substantially vertical plane 48, and the inner end of the substantially horizontal plane 49 is continuous with the lower end of the inclined surface 41. The second cutting starting point step portion 45 is formed by the substantially horizontal plane 49 and the inclined surface 41. The inclined surface 41 is inclined toward the outside of the lower surface.

As shown in FIGS. 2 to 4, the lid member 1 has a reinforcing reinforcing bar 5 embedded in a portion other than a portion below and side of the cutting starting point step portions 44 and 45. In other words, the portion below and side of the cutting starting point step portions 44 and 45 is a non-existent portion of the reinforcing reinforcing bar 5. Therefore, the reinforcing reinforcing bar 5 does not become an obstacle when cutting using the cutting starting step portions 44 and 45. The reinforcing bar 5 is an iron round bar-shaped member extending in the longitudinal direction, the width direction, and the thickness direction of the lid member 1, respectively. The reinforcing bar 5 improves the strength of the lid member 1. Here, the portion of the lid member 1 that is lower than and lateral to the cutting starting point steps 44 and 45 refers to the portion with the cross hatch in FIG. In addition, in drawings other than FIGS. 2 to 4 and 8 which will be described later, the reinforcing bar 5 is not shown.

Next, the method of repairing the existing gutter of the present invention will be described in more detail with reference to FIGS. 5 to 11.
In performing the method for repairing the existing gutter of the present invention, the existing lid is removed from the target existing gutter. Then, a lid member mounting step of mounting the lower surface (3) side of the concrete lid member 1 on the lid receiving portion 65 of the existing gutter main body 62 from which the existing lid 61 is removed from the existing gutter 6 is performed. If necessary, a width adjusting step is performed before the member mounting step is performed.

The width adjusting step is performed as follows. As shown in FIG. 7, the width: W3 of the lid receiving portion 65 of the existing gutter main body 62 of the existing gutter from which the existing lid 61 has been removed is measured. The width of the lid receiving portion 65 may differ depending on the part even if it is the same existing gutter main body 62, but here, the width of the lid receiving portion 65: W3 is the maximum of the lid receiving portion 65 in the existing gutter main body 62. Refers to a small width. Width of lid receiving portion 65 of the existing gutter main body 62 from which the existing gutter 61 has been removed: W3 may differ for each existing gutter main body 62 or for each part, and further, the width of the lid receiving portion 65 at the time of installation of the existing gutter 6 May also be different. Examples of these causes include deformation of the structure 90, deformation of the existing gutter main body 62 due to pressure received from the surroundings including the structure 90, and damage to the existing gutter main body 62 when the existing lid 61 is removed. In the present embodiment, as shown in FIG. 7, the width of the lid receiving portion 65: W3 is narrower than the initial installation of the existing gutter 6 due to the inward deformation of the existing gutter body 62 of the structure 90. ..

Then, the width of the lid receiving portion 65 of the existing gutter main body 62 from which the existing lid 61 is removed: the width of W3 and the lid member 1 (the maximum width at the beginning of the lid member 1 (before width adjustment), and here, the lower surface width: Compare with W2). When the lower surface width (W2) of the prepared lid member 1 is larger than the width of the lid receiving portion 65 of the existing gutter main body 62 from which the existing lid 61 is removed: W3, the side surface of the lid member 65 is used by using a concrete cutter or the like. Cut off the bottom. Specifically, the lid member 1 is cut so that the adjusted width: W4 is smaller than the width of the lid receiving portion 65: W3. Here, as shown in FIG. 8, the lower side portion of the lid member 1 is used by using the second cutting starting point step portions 45, 45 (the blade 9 of the concrete cutter is applied to the second cutting starting point step portion 45). Is cut, and the width direction dimension of the lid member 1 is adjusted as shown in FIG. 9 (adjusted width: W4).

Next, as shown in FIG. 10, a lid on which the lid member 1 after the width adjusting step is placed from the lower surface (3) side on the lid receiving portion 65 of the existing gutter main body 62 from which the existing lid 61 is removed from the existing gutter 6. Perform the member mounting process. In the illustrated embodiment, the existing gutter body 62 has a lid receiving portion 65 composed of a pair of upper surface portions 63, 64 facing each other, so that this step is performed on the lid receiving portion 65 (upper surface portions 63, 64). This is done by placing the lower surface 3 of the lid member 1 on the lid member 1.

Then, a filler filling step of filling the filler 8 is performed from the side upper surface side of the side surfaces 4 and 4 of the lid member 1 placed on the lid receiving portion 65 in the longitudinal direction. Specifically, as shown in FIG. 11, the filler 8 is filled so as to fill the gap formed between the side surfaces 4 and 4 of the lid member 1 and the structure 90. Further, in the present embodiment, since the V-shaped groove 42 is formed on the side surface 4 (inclined surface 41) of the lid member 1, the filler 8 also penetrates into the V-shaped groove 42. As a result, the lid member 1 is more firmly fixed after the filler 8 is cured. As the filler, an asphalt mixture, ready-mixed concrete, cement mortar, non-shrink mortar and the like can be used, but non-shrink mortar is preferable in consideration of workability and durability. The filler 8 is filled so as to have a height substantially uniform with the upper end surface of the structure 90 and the upper surface 2 of the lid member 1. The filler 8 is later cured to firmly fix the lid member 1. This completes the repair of the existing gutter 6.

In the method for repairing the existing gutter described above, since the lid member 1 has an inclined surface 41 (in particular, in the lid member 1, the inclined surface 41 is provided on the upper portion of the lid member 1 and is exposed upward). A gap that expands upward can be secured between the side surfaces 4 and 4 of the lid member 1 and the structure 90, and the filler 8 can be poured into the gap. Further, due to the anchor effect between the inclined surface 41 of the lid member 1 and the filler 8, the lid member 1 can be fixed more firmly, and the lid member 1 can be prevented from falling off or rattling.

Further, in the method of repairing the existing gutter described above, the structure 90 and the existing gutter 6 (existing gutter body 62) are deformed or damaged, and the width of the lid receiving portion 65: W3 is the lid member 1 in whole or in part. Even if it becomes smaller than the width (lower surface width: W2) and it is difficult to place the lid member 1 on the lid receiving portion 65 as it is, the width of the lid member 1 is adjusted entirely or partially at the site. Can be dealt with. Further, since the lid member 1 is provided with step portions 44, 45 for cutting starting points extending in the longitudinal direction on both side surfaces 4, 4, it can serve as a dimensional mark when adjusting the width (cutting) of the lid member 1 or a cutting starting point. By hitting the blades of the concrete cutter against the step portions 44 and 45, the blades are less likely to shift, and workability when repairing the existing side grooves is improved.

In the above-described embodiment, in the width adjusting step, the lower side portion of the lid member 1 is cut by using the step portion 45 for the second cutting starting point, but it is shown in FIG. 12 depending on the width of the lid receiving portion 65: W3. As described above, the lower side portion of the lid member 1 may be cut using the step portion 44 for the first cutting starting point. As described above, since the lid member 1 includes the two cutting starting point step portions 44 and 45 having different positions in the width direction, the width direction dimension can be flexibly adjusted according to the width of the lid receiving portion 65: W3. Can be done.

In the above-described embodiment, the width (lower surface width: W2) of the prepared lid member 1 in the width adjusting step is larger than the width of the lid receiving portion 65 of the existing gutter main body 62 from which the existing lid 61 is removed: W3. Therefore, the lower part of the side portion of the lid member 1 was cut. On the other hand, when the width (W2) of the prepared lid member 1 is smaller than the width of the lid receiving portion 65 of the existing gutter main body 62 from which the existing lid 61 is removed: W3, it is necessary to cut the lid member 1. Absent. That is, in this case, the width adjusting step is completed when it is confirmed that the width of the lid member 1 is smaller than the width of the lid receiving portion 65: W3.

Next, FIGS. 13 and 14 show another embodiment of the concrete lid member for repairing the existing gutter of the present invention. The lid member 1a shown here can be used in the method for repairing an existing gutter of the present invention. The lid member 1a differs from the lid member 1 described above in the form of a side surface including a step portion for a cutting starting point. With respect to the lid member 1a having substantially the same configuration as the lid member 1 described above, the same names and reference numerals are used, and detailed description thereof will be omitted.

As shown in FIG. 13, the side surfaces 4a and 4a in the longitudinal direction of the lid member 1a are inclined surfaces 41a and 41a that incline outward toward the lower surface (downward) over the entire length in the thickness direction. .. In the lid member 1a, the upper surface width: W1a is smaller than the lower surface width: W2a. The lid member 1a includes two cutting starting point step portions 44a and 45a extending in the longitudinal direction and formed so as to be recessed inward in the width direction from the inclined surface 41a.

Specifically, as shown in FIG. 14, the first step forming surface 77 extends diagonally inward from a part of the inclined surface 41a extending diagonally upward from the side end of the lower surface 3 of the lid member 1a. The second step forming surface 78 extends diagonally outward from the inner end of the first step forming surface 77. The outer end of the second step forming surface 78 is continuous with the inclined surface 41a. A first cutting starting point step portion 44a is formed by the first step portion forming surface 77 and the second step portion forming surface 78.

The lid member 1a has a second cutting starting point step portion 45a formed above the first cutting starting point step portion 44a. Specifically, as shown in FIG. 14, a third step forming surface 79 extends diagonally inward from a part of the inclined surface 41a above the first cutting starting step 44a, and the third A fourth step forming surface 80 extends diagonally outward from the inner end of the step forming surface 79. The outer end of the fourth step forming surface 80 is continuous with the inclined surface 41a. The second cutting starting point step portion 45a is formed by the third step portion forming surface 79 and the fourth step portion forming surface 80. The second cutting starting point step portion 45a is located above and slightly inward from the first cutting starting point step portion 44a.

In such a lid member 1a as well, similarly to the lid member 1 described above, since the lid member 1a has an inclined surface 41a at the upper part and the inclined surface 41a is exposed upward, the side surface 4a of the lid member 1a , 4a and the structure 90 can secure a gap that expands upward, and the filler 8 can be poured into the gap. Further, due to the anchor effect between the inclined surface 41a of the lid member 1a and the filler 8, the lid member 1a can be fixed more firmly, and the lid member 1a can be prevented from falling off or rattling.

Further, the structure 90 and the existing gutter 6 (existing gutter body 62) are deformed or damaged, and the width of the lid receiving portion 65: W3 becomes smaller than the width of the lid member 1a (here, the lower surface width: W2a). Even if it is difficult to place the lid member 1a on the lid receiving portion 65 as it is, the width of the lid member 1a can be adjusted at the site. Further, since both side surfaces 4a and 4a of the lid member 1a are provided with step portions 44a and 45a for cutting starting points extending in the longitudinal direction of the lid member 1a, they can serve as dimensional marks when the width of the lid member 1a is adjusted (cut). By hitting the blades of the concrete cutter on the step portions 44a and 45a for the cutting starting point, the blades are less likely to shift, and the workability when repairing the existing side groove is improved.

The lid member used in the method for repairing an existing gutter of the present invention may not have a step portion for a cutting starting point. For example, as shown in FIG. 15, the side surfaces 4b and 4b of the lid member 1b are inclined surfaces 41b and 41b that are uniformly inclined outward toward the lower surface direction (downward) over the entire length in the thickness direction. It may be. In the lid member 1b, the upper surface width: W1b is smaller than the lower surface width: W2b. Even in such a form, since the lid member 1b has inclined surfaces 41b and 41b on both side surfaces 4b and 4b in the longitudinal direction, the blade of the concrete cutter is inserted when cutting the lower side surface of the lid member 1b. easy. Further, when cutting the lower side surface of the lid member 1b, the cut portion and the thickness can be made smaller than when the lid member 1b is cut over the entire length in the thickness direction.

The inclined surfaces provided on both side surfaces of the lid member are not limited to those provided on the upper portion of the lid member and exposed upward. For example, a part of the upper portion of the side surface is a straight surface (vertical surface). May be good. The inclined surfaces provided on both side surfaces of the lid member are not limited to those that are linearly inclined, and a part or all of them may be curved.

The upper surface of the lid member may have a one-sided inclined shape or a flat shape (a shape without inclination). Further, the side surface and the end surface in the longitudinal direction of the lid member may be formed with a convex portion protruding outward for the purpose of defining the position in the width direction and the longitudinal direction.

Further, the existing gutter to be repaired may include the existing gutter main body 62a as shown in FIG. The existing gutter main body 62a includes a bottom plate portion 66 and side walls 67a and 68a extending upward from both side portions of the bottom plate portion 66. A lid receiving portion 65a composed of a pair of upper surface portions 63a and 64a facing each other is formed on the upper portion of the side walls 67a and 68a. Specifically, stepped portions 69 and 70 facing each other are formed on the upper portions of the side walls 67a and 68a, respectively, and upper surface portions 63a and 64a are formed therein. The existing lid 61 is placed on the lid receiving portion 65a composed of the upper surface portions 63a and 64a. The side walls 67a and 68a are further provided with side wall upper portions 71 and 72 extending upward from the stepped portions 69 and 70.

Even in such an existing gutter main body 62a, the width of the lid receiving portion 65a after the existing lid 61 is removed due to deformation or damage of the surrounding structure (not shown) or the existing gutter main body 62a: W3a However, it may change from the beginning of installation of the existing gutter (see FIG. 17). Here, if the lid member 1 described above is used, the lower side surface of the lid member 1 is cut when the width of the lid member 1 is larger than the width of the lid receiving portion 65a after removing the existing lid 61: W3a. It can be dealt with by performing a width adjustment process. That is, for example, as shown in FIG. 18, the width of the lid member 1 is adjusted by cutting the lower part of the side portion of the lid member 1 using the step portion 45 for the second cutting starting point, and the lid member 1 is closed. It is placed on the receiving portion 65a (upper end surfaces 63a, 64a of the existing gutter main body 62a), and the filler 8 is filled between the lid member 1 and the side wall upper portions 71, 72 of the existing gutter main body 62a to form the existing gutter. Can be repaired.

1 Lid member 2 Upper surface 3 Lower surface 4 Side surface 5 Reinforcing bar 6 Existing gutter 8 Filler 23 Slit hole 24 Inclined surface 41 Inclined surface 44 First cutting starting step 45 Second cutting starting step 61 Existing lid 62 Existing gutter Main body 63 Top surface 64 Top surface 65 Lid receiving part

Claims (6)

This is a method of repairing existing gutters.
The method of repairing the existing gutter is
It is a concrete lid member that extends in the longitudinal direction of the existing side groove body from which the existing lid has been removed and is placed on a lid receiving portion consisting of a pair of upper surface portions facing each other, and faces downward on both side surfaces in the longitudinal direction. A lid member preparation step for preparing a concrete lid member for repairing an existing side groove having an inclined surface inclined outward and having an upper surface width smaller than the lower surface width.
A lid member mounting step of mounting the lower surface side of the concrete lid member on the lid receiving portion of the existing gutter body from which the existing lid is removed from the existing gutter.
The filler filling step of filling the filler from the side upper surface side of both side surfaces in the longitudinal direction of the concrete lid member placed on the lid receiving portion is performed.
Further, in the method of repairing the existing gutter, when the width of the prepared concrete lid member is larger than the width of the lid receiving portion of the existing gutter body from which the existing lid is removed, the concrete lid member A method of repairing an existing gutter, which comprises performing a width adjusting step of cutting the lower part of the side surface. This is a method of repairing existing gutters.
The method of repairing the existing gutter is
It is a concrete lid member that extends in the longitudinal direction of the existing side groove body from which the existing lid has been removed and is placed on a lid receiving portion consisting of a pair of upper surface portions facing each other, and faces downward on both side surfaces in the longitudinal direction. A concrete lid member for repairing an existing side groove, which has an inclined surface inclined outward, has an upper surface width smaller than the lower surface width, and further has step portions for a cutting starting point extending in the longitudinal direction of the lid member on both side surfaces. The lid member preparation process to prepare
A lid member mounting step of mounting the lower surface side of the concrete lid member on the lid receiving portion of the existing gutter body from which the existing lid is removed from the existing gutter.
The filler filling step of filling the filler from the side upper surface side of both side surfaces in the longitudinal direction of the concrete lid member placed on the lid receiving portion is performed.
Further, in the method of repairing the existing gutter, when the width of the prepared concrete lid member is larger than the width of the lid receiving portion of the existing gutter body from which the existing lid has been removed, the step portion for the cutting starting point A method for repairing an existing gutter, which comprises performing a width adjusting step of cutting the concrete lid member using the above. A concrete lid member for repairing an existing gutter for mounting on a lid receiving portion consisting of a pair of upper surface portions that extend in the longitudinal direction of the existing gutter body from which the existing lid has been removed and that face each other.
The concrete lid member has an upper surface, a lower surface for mounting on the lid receiving portion of the existing side groove main body, and inclined surfaces inclined outward toward the lower surface on both side surfaces in the longitudinal direction. A concrete lid member for repairing an existing side groove, wherein the upper surface width is smaller than the lower surface width, and further, both side surfaces thereof are provided with a step portion for a cutting starting point extending in the longitudinal direction of the lid member. The concrete lid member for repairing an existing gutter according to claim 3, wherein the concrete lid member is used in the method for repairing an existing gutter according to claim 1. The concrete for repairing an existing gutter according to claim 3 or 4, wherein the concrete lid member has reinforcing bars embedded in a portion other than a portion lower and a side portion than the step portion for a cutting starting point. Lid making member. The concrete lid member is provided with a slit hole penetrating in the thickness direction in a central portion in the width direction, and has an inclined surface on the upper surface which is inclined downward toward the slit hole. The concrete lid member for repairing an existing gutter according to any one of claim 5.

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