JP7406411B2 - U-shaped groove installation method and U-shaped groove structure - Google Patents

Description

The present invention relates to a U-shaped groove installation method and a U-shaped groove structure installed by the U-shaped groove installation method.

Conventionally, U-shaped ditches have been known as civil engineering materials used for waterways, drainage channels, and the like. Concrete, synthetic resin, and steel are generally used as materials for the U-shaped groove. In general, the installation method (construction method) of a U-shaped groove is to excavate the ground surface where you want water to move or flow, create a groove, install a U-shaped groove there, and then install a U-shaped groove. Construction is done by compacting the ground surface so that there are no gaps between the trench and the cut surface.

For example, as for a U-shaped groove made of concrete, Patent Document 1 discloses that from the bottom surface 11 to a predetermined intermediate position in the longitudinal direction 20 of one or both of the opposing side walls 12 standing approximately perpendicularly from the bottom surface 11. A substantially U-shaped concrete flume 10 is disclosed in which a slope portion 13 having a predetermined width that slopes outward toward the top is formed (paragraphs [0020] to [0026] of the specification of Patent Document 1). , see Figures 1 to 5 of the drawings, etc.).

In the U-shaped groove described in Patent Document 1, a groove is created by excavating the ground surface, and the concrete flume 10 is installed in the groove. There is a possibility that creatures living around the waterway will fall into this U-shaped groove, but since it has a sloped part 13, creatures that have fallen using this sloped part 13 can escape on their own. This means that it will be possible to do so.

Further, as a U-shaped groove made of resin, Patent Document 2 discloses a groove main body 12 made of synthetic resin as the main raw material and having a bottom wall 14 and side walls 16 rising from both ends of the bottom wall in the width direction. A U-shaped groove 10 is disclosed at the bottom to which an earth pressure receiving part 34 that extends in the width direction and extends in the longitudinal direction is connected (see paragraphs [0041] to [0060] of the specification of Patent Document 2, and the drawings). (See Figure 1, Figure 10, etc.)

Similarly to the U-shaped groove of Patent Document 1, the U-shaped groove 10 described in Patent Document 2 is also formed by excavating the ground surface, and the U-shaped groove 10 is set there. In this U-shaped groove 10, earth pressure acts on the side walls and the side walls tend to collapse inward, but the collapse can be reduced by the earth pressure receiving portion being locked by the ground. It is.

The U-shaped groove made of steel is made of a corrugated steel plate according to Patent Document 3 proposed by the applicant, and when designing the corrugated shape of the corrugated steel plate, the bottom part is separated from the outer surface of both side walls. A corrugated steel flume whose bottom straight part length and wave depth are set so that the overall buckling equivalent pressure when it buckles due to horizontally acting external pressure is equal to the yield stress when it yields due to the external pressure. 1 is disclosed (see paragraphs [0022] to [0039] of the specification of Patent Document 3, FIGS. 1 to 7 of the drawings, etc.).

The corrugated steel plate flume 1 described in Patent Document 3 also excavates the ground surface to create a groove, and the corrugated steel plate flume 1, which is a U-shaped groove, is installed there. This corrugated steel flume 1 can have an efficient cross-sectional shape (wave shape) in relation to the strength of the corrugated steel flume and the amount of steel used, and is the most rational for the earth pressure acting on the side wall. It has a structure.

On the other hand, due to the frequent occurrence of heavy rain disasters in recent years, when designing drainage channels, etc., the number of cases in which the amount of rainfall per hour is increased compared to the past is increasing. At this time, the existing drainage channels cannot provide the required drainage capacity, and a new U-shaped groove or the like will have to be added. There are a considerable number of areas that need to be addressed, and prompt action is required to prevent a repeat of heavy rain disasters.

However, all conventional U-shaped grooves as described in Patent Documents 1 to 3, regardless of the material, were constructed by excavating the ground surface to create a groove, and then installing the U-shaped groove there. . In particular, when installing a new U-shaped groove on an embankment slope or cut slope of an existing road, heavy machinery cannot enter and the slope must be excavated manually, so digging a groove to accommodate the U-shaped groove is a considerable amount of labor. The problem was that the construction work was slow to progress.

In addition, since conventional U-shaped grooves were installed by excavating the ground surface, earth pressure acts on the sides of the U-shaped groove, so if it is made of concrete, the thickness of the U-shaped groove should be increased. In the case of synthetic resin or steel, it is necessary to add corrugations, ribs, etc., resulting in an increase in the cost of the material.

Japanese Patent Application Publication No. 2011-157744 Japanese Patent Application Publication No. 2016-188463 International Publication No. 2013/002095

Therefore, the present invention was devised in view of the above-mentioned problems, and its purpose is to eliminate the excavation work, shorten the construction period, reduce the risk of people accidentally falling, and It is an object of the present invention to provide a method for installing a U-shaped groove and a U-shaped groove structure that can reduce costs by reducing measures to counter earth pressure.

The method for installing a U-shaped groove according to the first invention is a U-shaped groove installation method in which a U-shaped groove having a substantially U-shaped cross section is placed on the ground surface as an installation surface without excavating the ground surface . and a U-shaped groove fixing step of fixing the U-shaped groove to the installation surface with the U-shaped groove exposed above the ground surface. A fixing object installation step of installing a self-supporting cage body fixing object to sandwich the U-shaped groove, fixing the U-shaped groove with the weight of the fixing object, and supporting the U-shaped groove. Features.

In the method for installing a U-shaped groove according to a second invention, in the first invention, the fixed object installation step includes a cage mounting step of mounting a cage on the installation surface, and a step of placing a cage on the cage with stones, gravel or earth. It is characterized by having a filling material filling process of filling.

In the method for installing a U-shaped groove according to a third aspect of the invention, in the first aspect, the installation surface is a slope, and the fixed object installation step includes a cage mounting step of placing the cage on the slope; The present invention is characterized by comprising a filler filling step of filling the cage with gravel or earth and sand, and a cage fixing step of fixing the cage to the slope.

In the method for installing a U-shaped groove according to a fourth aspect of the invention, in the first aspect, the installation surface is a slope, and the step of installing the fixed object is to form the slopes on both sides on which the U-shaped groove is placed into a step-like shape. a step of leveling the ground; a step of placing the cage on a step-like slope leveled in the step of leveling the ground; a filling step of filling the cage with gravel or earth; It is characterized by having the following.

A U-shaped groove structure according to a fifth aspect of the present invention includes a U-shaped groove made of a steel plate and having a substantially U-shaped cross section, and is installed by the method for installing a U-shaped groove according to any one of claims 1 to 4 . It is characterized by

A U-shaped groove structure according to a sixth aspect of the invention includes a U-shaped groove made of resin and having a substantially U-shaped cross section, and is installed by the U-shaped groove installation method according to any one of claims 1 to 4 . It is characterized by

According to the first to sixth inventions, since the U-shaped groove can be installed without excavating the ground surface, which is the installation surface, it is possible to significantly shorten the construction period and reduce construction costs. Furthermore, according to the first to sixth inventions, since the U-shaped groove is installed on the ground surface, which is the installation surface, earth pressure does not act on the sides of the U-shaped groove, and it is difficult to resist earth pressure. There is no need to thicken, corrugate, add ribs, etc., and the cost of materials can be reduced, which can reduce the cost of the entire U-shaped groove construction.

In particular, according to the first invention, since the U-shaped groove is supported by a fixed object, it is easy to install and fix the U-shaped groove, and the fluid pressure (water pressure) of water flowing through the U-shaped groove is Even if it acts on the side surface of the groove, the U-shaped groove can be prevented from protruding by the self-supporting fixed object.

In particular, according to the second invention, since the cage is used as a fixing object when fixing the U-shaped groove, it is extremely easy to construct and can reduce costs by shortening the construction period, as well as retaining the shape for a long period of time. It can improve long-term stability. Furthermore, according to the third invention, since the materials used are relatively inexpensive, cost reduction can also be achieved in this respect.

In particular, according to the third invention, even when the installation surface is a slope, it is possible to prevent the cage, which is a fixed object, from sliding down the slope and moving downward.

In particular, according to the fourth invention, by stacking the cages in a stair-like manner, it is possible to prevent the cages from sliding down the slope. Further, according to the fourth invention, although earth and sand are generated when leveling the surface on which the cage is installed in a step-like manner, the earth and sand can be used as filling material for the cage, and the cost of disposing of the earth and sand can be reduced. . Moreover, according to the fourth aspect of the invention, since step-like cage bodies are constructed on both sides of the U-shaped groove, by using the stepped cage bodies as work scaffolding, it becomes easier to install, replace, inspect, etc. the U-shaped groove. It also has advantages.

According to the fifth invention, in addition to the above-mentioned effects, by making the U-shaped groove made of steel, weight reduction can be achieved, construction speed can be improved, and cost reduction can be achieved by shortening the construction period.

According to the sixth invention, in addition to the above-mentioned effects, by making the U-shaped groove made of resin, it is lighter in weight compared to a U-shaped groove made of steel plate, and the construction speed is improved, resulting in a shorter construction period. Cost reduction can be achieved.

FIG. 1 is a vertical sectional view showing a U-shaped groove structure installed by the U-shaped groove installation method according to the first embodiment of the present invention. FIG. 2 is a perspective view showing the U-shaped groove structure same as above. FIG. 3 is a vertical sectional view showing a modification of the U-shaped groove structure installed by the U-shaped groove installation method according to the first embodiment. FIG. 4 is a vertical sectional view showing a U-shaped groove structure installed by the U-shaped groove installation method according to the second embodiment of the present invention. FIG. 5 is a perspective view showing a single U-shaped groove having the same U-shaped groove structure as above. FIG. 6 is a side view showing a U-shaped groove structure installed by the U-shaped groove installation method according to the second embodiment. FIG. 7 is a vertical sectional view showing a U-shaped groove structure installed by the U-shaped groove installation method according to the third embodiment of the present invention. FIG. 8 is a side view showing a U-shaped groove structure installed by the U-shaped groove installation method according to the third embodiment. FIG. 9 is a vertical sectional view showing a U-shaped groove structure installed by the U-shaped groove installation method according to the fourth embodiment of the present invention. FIG. 10 is a side view showing a U-shaped groove structure installed by the U-shaped groove installation method according to the fourth embodiment. FIG. 11 is a process explanatory diagram showing a U-shaped groove mounting step of the U-shaped groove installation method according to the fourth embodiment. FIG. 12 is a process explanatory diagram showing the ground leveling process and the cage mounting process of the U-shaped groove installation method according to the fourth embodiment.

Hereinafter, a U-shaped groove installation method and a U-shaped groove structure installed by the U-shaped groove installation method according to an embodiment of the present invention will be described in detail with reference to the drawings.

[First embodiment]
A method for installing a U-shaped groove according to a first embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a vertical sectional view showing a U-shaped groove structure 10 installed by the U-shaped groove installation method according to the first embodiment of the present invention, and FIG. 2 is a perspective view showing the U-shaped groove structure 10 of FIG. 1. It is a diagram. As shown in FIGS. 1 and 2, in the U-shaped groove installation method according to the first embodiment, a U-shaped groove structure 10 including a U-shaped groove U1 having a substantially U-shaped cross section made of a steel plate is constructed. This will be explained with an example.

(U-shaped groove placement process)
In the U-shaped groove installation method according to the first embodiment of the present invention, first, a U-shaped groove mounting step is performed in which the U-shaped groove U1 is placed on the ground surface G1, which is the installation surface. At this time, the U-shaped groove U1 is simply placed on the ground surface G1. In addition, if the installation surface is uneven, the installation surface may be slightly raised or adjusted when placing the U-shaped groove, but even if this level of land leveling work is performed, this embodiment will not work. shall be included in. That is, in the present invention, the meaning of "installation as is" is that there is no need for large excavation to accommodate the U-shaped groove main body on the installation surface, and various modifications can be made without departing from this spirit.

On the other hand, in the conventional method of installing a U-shaped groove, regardless of the material of the U-shaped groove, a groove is created by excavating the ground surface G1 of the ground, and the U-shaped groove is accommodated in the groove. A method was taken to install it. For this reason, digging trenches in the ground requires time and effort, which increases costs.

Furthermore, when installing a new U-shaped trench on an embankment slope or a cut slope of an existing road, heavy equipment cannot be used to excavate on steep slopes, and excavation work must be carried out manually on the slope. Ta. For this reason, when the installation surface is a slope, it takes considerable effort to dig a trench large enough to accommodate the U-shaped trench, creating the problem that construction progress is slow.

Note that the U-shaped groove U1 installed in this process is a steel plate (generally, a plate made of hot-rolled mild steel plate SPHC) that has a predetermined thickness that can withstand the pressure of the fluid flowing in the groove (for example, drainage water such as rainwater). A steel U-shaped flume formed from a steel plate (approximately 1.6 mm to 4.0 mm thick) with a substantially U-shaped cross section is illustrated. Further, the U-shaped groove U1 is subjected to a hot-dip galvanizing treatment for rust prevention. Of course, the antirust surface treatment applied to the U-shaped groove U1 may be simply a coating treatment such as antirust paint.

As shown in FIGS. 1 and 2, this U-shaped groove U1 includes a U-shaped flume body 11 having a substantially U-shaped cross section, a flange 12 projecting outward along the upper edge of this U-shaped flume body 11, etc. , is composed of. In the illustrated embodiment, the U-shaped flume main body 11 and the flange 12 are integrated. It can also be a separate entity.

Of course, the U-shaped groove U1 is not limited to steel, and may be made of concrete or resin. Furthermore, as will be described later, the U-shaped groove U1 is preferably constructed from a corrugated steel plate subjected to corrugation processing (corrugation processing), since the steel plate can be made thinner in the entire U-shaped groove U1.

(U-shaped groove fixing process)
Next, in the U-shaped groove installation method according to the first embodiment, a U-shaped groove fixing step is performed in which the U-shaped groove U1 is fixed to the ground surface G1 of the ground, which is the installation surface. In this embodiment, the ground surface G1 is assumed to be approximately horizontal or gently sloped, and is made of earth and sand, such as cutting and embankment. However, it goes without saying that the installation surface on which the U-shaped groove U1 is installed may be an earth and sand surface other than cutting or embankment, or artificial ground such as concrete paving.

In this process, a nail-shaped nail having a head 13a made of a steel rod is inserted into the fixing hole 11a formed in the bottom of the U-shaped groove U1 placed on the ground surface G1 in the previous process (U-shaped groove mounting process). A pile 13 is driven into the ground and fixed. This is to prevent the U-shaped groove U1 from sliding off the ground surface G1 and moving due to the inclination of the ground surface G1 or being washed away by water current. Note that the fixing hole 11a is slightly larger than the diameter of the pile 13, and is formed in a corresponding hole. Of course, the stakes 13 are not limited to steel materials such as steel rods, and may be made of any material such as wood or resin.

Furthermore, if a ring-shaped rubber packing (not shown) is interposed between the head 13a of the pile 13 and the fixing hole 11a, the fluid flowing in the U-shaped groove U1 can be prevented from leaking from these gaps. It is preferable because it can be done.

In addition, the head 13a of the pile 13 is made into a round head to reduce the resistance between the head 13a and the fluid, and the fixing hole 11a is made into a counterbore so that the upper surface of the head 13a and the bottom of the U-shaped flume body 11 It may be arranged so that the surfaces are substantially flush with each other.

In addition, as the U-shaped groove fixing process, the case where the stake 13 is driven into the fixing hole 11a formed on the bottom surface of the U-shaped groove U1 and fixed has been described, but as shown in FIG. 3, the U-shaped groove U1 The flanges 12 on both sides may be fixed with hooked stakes 13' made of steel rods. FIG. 3 is a vertical sectional view showing a U-shaped groove structure 10' according to a modified example installed by the U-shaped groove installation method according to the first embodiment. According to the U-shaped groove structure 10' according to the modified example, there is an advantage that there is no need to perform water leakage treatment such as the above-mentioned rubber packing.

(Protrusion suppression member installation process)
Next, in the U-shaped groove installation method according to the first embodiment, a protrusion suppressing member is installed between the flanges 12, 12 of the U-shaped groove U1 fixed to the ground surface G1 in the previous step (U-shaped groove fixing step). A protrusion suppressing member installation process is performed in which a certain strut 14 is installed over a span. By completing this step, the U-shaped groove installation work according to the U-shaped groove installation method according to the first embodiment is completed.

Specifically, in this step, bolts B1 are inserted into bolt holes 12a formed in the flanges 12, 12, and the struts 14 are bolted and fixed between the flanges 12, 12. Of course, the connection between the struts 14 and the flanges 12 is not limited to bolt connection, and it goes without saying that they may be fixed by riveting or welding.

The struts 14 illustrated as protrusion suppressing members are exemplified by angle irons (L-shaped angles) of L=50 mm x 50 mm x 4 mm made of general structural rolled steel (SS400). Of course, the protrusion suppressing member according to the present invention is not limited to steel materials such as angle iron or flat bars, and the side surface of the U-shaped flume body 11 bulges outward due to the influence of fluid pressure, etc., and the flanges 12, 12 It doesn't matter what material it is made of, as long as it can resist the force that increases the distance between them.

This protrusion suppressing member installation process may be performed before the above-mentioned U-shaped groove mounting process, and the struts 14 may be attached to the U-shaped groove U1 in advance. If the position where the bolt hole 12a is provided and the position where the fixing hole 11a is provided are shifted in the longitudinal direction of the U-shaped groove U1, when driving the pile 13 in the U-shaped groove fixing process, This is because there is no problem.

Further, this step may be omitted and the strut 14 may not be installed between the flanges 12, 12. Depending on the scale and installation conditions of the U-shaped groove U1, the strength of the U-shaped groove U1 alone may be able to resist the side surfaces of the U-shaped flume body 11 from bulging outward due to the influence of fluid pressure, etc. be. However, it is preferable to provide the struts 14 as the protrusion suppressing member, since the overall thickness of the U-shaped flume body 11 can be made thinner than when the struts 14 are not provided, and the material cost can be reduced.

According to the U-shaped groove installation method according to the first embodiment described above, the U-shaped groove U1 is placed as it is on the ground surface G1 in the U-shaped groove mounting process, and the U-shaped groove U1 is placed as it is on the ground surface G1 in the U-shaped groove fixing process. The U-shaped groove installation work is completed by simply fixing the U-shaped groove U1 to the ground surface G1. Therefore, the work of digging a trench in the ground surface capable of accommodating the U-shaped trench, which is necessary in the conventional method of installing a U-shaped trench, can be completely omitted, and the time required for these works can be shortened. Therefore, according to the U-shaped groove installation method according to the present embodiment, compared to the conventional U-shaped groove installation method, the installation time can be significantly shortened and a significant cost reduction can be achieved.

Furthermore, according to the U-shaped groove installation method according to the first embodiment, since the U-shaped groove U1 is installed on the ground surface G1, which is the installation surface, earth pressure does not act on the side surfaces of the U-shaped groove U1. , it becomes unnecessary to add thickening, corrugation, ribs, etc. to resist earth pressure. Therefore, the U-shaped flume main body 11 can be made thinner, and the cost of the materials for the U-shaped groove U1 can be reduced, thereby achieving a cost reduction of the entire U-shaped groove U1 installation work.

[Second embodiment]
Next, a method for installing a U-shaped groove according to a second embodiment of the present invention will be explained using FIGS. 4 to 6. FIG. 4 is a vertical sectional view showing the U-shaped groove structure 20 installed by the U-shaped groove installation method according to the second embodiment of the present invention, and FIG. 5 is a vertical sectional view of the U-shaped groove structure 20 of FIG. FIG. 3 is a perspective view showing a single groove U2. Moreover, FIG. 6 is a side view showing the U-shaped groove structure 20. In the U-shaped groove installation method according to the second embodiment, the U-shaped groove structure includes a U-shaped groove U2 made of a steel plate and having a substantially U-shaped cross section, and a fixed object that stands on its own on the installation surface of the U-shaped groove U2. 20 is constructed along the ground surface G1, which is the installation surface, as an example.

(U-shaped groove placement process)
In the U-shaped groove installation method according to the second embodiment of the present invention, similarly to the U-shaped groove installation method according to the first embodiment described above, first, the U-shaped groove U2 is installed on the ground surface G1, which is the installation surface. A U-shaped groove mounting process is performed. At this time, the U-shaped groove U2 is simply placed on the ground surface G1 along the ground surface G1 on which the U-shaped groove U2 is installed.

Note that if the installation surface is uneven, some amount of heaping or adjustment may be required to the installation surface when placing the U-shaped groove, but this embodiment is suitable for this level of land leveling work. shall be included. That is, in the present invention, placing it on the ground surface G1 as it is means that there is no need for large excavation to accommodate the U-shaped groove main body on the ground surface G1, and various methods may be used without departing from this idea. Modifications are possible. Further, although not shown, at this time, by temporarily fixing the U-shaped groove U2 to the installation surface with the stakes 13 shown in FIG. 1, etc., it is possible to prevent the U-shaped groove U2 from falling sideways.

In addition, the U-shaped groove U2 installed in this process is made of a corrugated steel plate (generally made of hot-rolled mild steel plate SPHC with a thickness of 1.6 mm to 4 mm) that has been corrugated (corrugated) at a predetermined pitch. The U-shaped flume is made from a corrugated steel plate formed into a substantially U-shaped cross section. The U-shaped groove U2 is also plated with hot dip galvanization for rust prevention. Of course, the antirust surface treatment applied to the U-shaped groove U2 may be simply a coating treatment such as antirust paint.

As shown in FIG. 5, this U-shaped groove U2 is composed of a U-shaped flume body 21 having a substantially U-shaped cross section, and a flange 22 projecting outward along the upper edge of this U-shaped flume body 21. has been done. In the illustrated embodiment, the U-shaped flume main body 21 and the flange 22 are integrated. It can also be made separate.

Of course, the U-shaped groove U2 is not limited to steel, and may be made of concrete or resin. Moreover, the U-shaped groove U2 can also be made into the U-shaped groove U1 which is not subjected to the above-mentioned corrugation process. Even in that case, it is possible to take appropriate measures depending on the design, such as increasing the plate thickness.

In addition, as shown in FIG. 6, the U-shaped grooves U2 and U2 are joined to each other by overlapping the corrugated steel plates by one peak, and using elongated holes provided near the center of both longitudinal ends of the side surface of the U-shaped flume body 21. A bolt connection (not shown) is made at 21a. It is preferable that the joints between the U-shaped grooves U2 and U2 are joined via a packing made of a rubber plate in order to prevent water leakage.

(U-shaped groove fixing process: Fixed object installation process)
Next, in the U-shaped groove installation method according to the second embodiment, a U-shaped groove fixing step is performed in which the U-shaped groove U2 is fixed to the ground surface G1 of the ground, which is the installation surface. However, in the U-shaped groove installation method according to the second embodiment, the U-shaped groove fixing step is different from the U-shaped groove fixing step in the U-shaped groove installation method according to the first embodiment described above. This is a fixed object installation step in which freestanding fixed objects 23 are installed on both sides of the groove U2 to support the U-shaped groove U2.

In this fixed object installation process, rectangular parallelepiped fixed objects 23, 23 are installed on both sides of the U-shaped groove U2 placed on the ground surface G1 in the above-mentioned U-shaped groove mounting process, and the U-shaped groove U2 is sandwiched between the fixed objects 23, 23. Then, the U-shaped groove U2 is fixed by the weight of the fixed object 23, and the U-shaped groove U2 is supported.

Of course, as described later, the fixed object 23 may be fixed to the ground surface G1 with an anchor or the like, or a connecting step may be provided to connect the U-shaped groove U2 and the fixed object 23.

The fixed object 23 installed in this step can be, for example, a block made of rubber or concrete having a predetermined weight, or an aggregate of a plurality of sandbags. Of course, the shape and material of the fixed object according to the present invention are not particularly limited as long as it has a predetermined weight and can stand on its own.

By completing this step, the U-shaped groove installation work according to the U-shaped groove installation method according to the second embodiment is completed, and as shown in FIGS. 4 and 6, the U-shaped groove structure 20 is placed on the ground. built on surface G1. Note that in the above example, the U-shaped groove was first placed on the installation surface, and then fixed objects were installed on both sides of the U-shaped groove. Alternatively, a U-shaped groove may be installed in the space. Alternatively, first install one row of fixed objects, then place the U-shaped groove on the installation surface while leaning against the fixed object, and then place one row of fixed objects with the U-shaped groove in between. May be placed. That is, in the present invention, if each step of the installation method exists, the order of the steps can be changed.

However, the above-mentioned strut 14 may be bridged and bolted between the flanges 12 and 12 of the U-shaped groove U2 by providing a protrusion suppressing member installation step (as described in the third and fourth embodiments described later). The same applies to the installation method of U-shaped grooves). Providing the struts 14 is preferable because the overall thickness of the U-shaped flume body 21 can be further reduced, and material costs can be reduced.

According to the U-shaped groove installation method according to the second embodiment described above, the U-shaped groove fixing step installs the fixing objects 23, 23 on both sides of the U-shaped groove U2 to sandwich the U-shaped groove U2, It is only necessary to fix the U-shaped groove U2 by the weight of the fixed object 23. Therefore, in addition to the above effects, it is easy to install and fix the U-shaped groove, and the work time for installing the U-shaped groove can be shortened, thereby reducing construction costs.

Moreover, according to the U-shaped groove installation method according to the second embodiment, even if the pressure of the fluid flowing in the U-shaped groove U2 acts on the side surface of the U-shaped groove U2, the weight of the fixed object 23 will cause the U-shaped groove U2 to Protrusion can be suppressed. Therefore, the protrusion suppressing member installation step can be omitted, the work time for installing the U-shaped groove can be shortened, and construction costs can be reduced.

[Third embodiment]
Next, a method for installing a U-shaped groove according to a third embodiment of the present invention will be described using FIGS. 7 and 8. FIG. 7 is a vertical sectional view showing a U-shaped groove structure 30 installed by the U-shaped groove installation method according to the third embodiment of the present invention, and FIG. 8 is a side view showing the U-shaped groove structure 30. . The U-shaped groove installation method according to the third embodiment includes a U-shaped groove U2 made of the above-mentioned corrugated steel plate, and a cage frame 31 that is a fixed object that stands on its own on the installation surface of the U-shaped groove U2. An example in which the groove structure 30 is constructed along the slope G2 will be described.

(U-shaped groove placement process)
In the U-shaped groove installation method according to the third embodiment of the present invention, similarly to the U-shaped groove installation method according to the second embodiment described above, first, the U-shaped groove U2 is placed on the slope G2 which is the installation surface. A U-shaped groove mounting process is performed. At this time, the U-shaped groove U2 is simply placed on the slope G2 as it is along the slope G2 on which the U-shaped groove U2 is installed.

Note that if the installation surface is uneven, some amount of heaping or adjustment may be required to the installation surface when placing the U-shaped groove, but this embodiment is suitable for this level of land leveling work. shall be included. That is, in the present invention, the meaning of "installation as is" is that there is no need for large excavation to accommodate the U-shaped groove main body on the installation surface, and various modifications can be made without departing from this spirit. Further, although not shown, at this time, by temporarily fixing the U-shaped groove U2 to the installation surface with the stakes 13 shown in FIG. 1, etc., it is possible to prevent the U-shaped groove U2 from falling sideways.

(U-shaped groove fixing process: (1) cage mounting process)
Next, in the U-shaped groove installation method according to the third embodiment, a U-shaped groove fixing step is performed in which the U-shaped groove U2 is fixed to the slope G2 of the ground, which is the installation surface. However, in the U-shaped groove installation method according to the third embodiment, the U-shaped groove fixing step is different from the U-shaped groove fixing step of the U-shaped groove installation method according to the first embodiment described above. The process is divided into three steps: ) cage mounting step, (2) filling material filling step, and (3) cage fixing step.

In the U-shaped groove installation method according to the third embodiment, first, as the U-shaped groove fixing process, (1) a cage mounting process is performed. In this step, a cage frame 31 (cage body) is used as a fixed object, unlike the rectangular parallelepiped fixed object 23 described above.

As shown in FIGS. 7 and 8, the cage frame 31 (cage body) is made of round steel 32 with a diameter of 13 mm or 9 mm made of steel materials such as reinforced concrete steel bars (SR235) and rolled steel materials for general structures (SS400). It is a lattice-like frame in the form of a roughly rectangular parallelepiped in which 6 mm welded wire meshes 33 are combined. The cage frame 31 is generally assembled into a lattice-like frame on site, lined with a sheet material, and filled with local soil to be used as a steel retaining wall or the like.

Although the cage frame 31 in the shape of a rectangular parallelepiped made of steel rods is illustrated as an example of the cage body according to the present invention, other examples include a "jakago" woven from iron wire, and a "futon basket" made of iron wire formed into a square shape. It will be done. Furthermore, the cage according to the present invention may be constructed by assembling a face material made of expanded metal or the like into a frame, and is cage-like in which a gap is formed that allows drainage to an extent that the filler material to be filled, which will be described later, does not fall out. If so, the material, shape, etc. of the cage can be selected as appropriate.

(1) In the cage mounting step, the cage frame 31 is assembled on the slope G2 described above, and the cage frame 31, which is a fixed object, is placed on the slope G2. Of course, it goes without saying that the car frame 31 may be assembled in advance at another location and then suspended and placed on the slope G2. However, when assembled on-site, materials can be easily transported without a lifting device, making it effective on steep slopes where heavy machinery cannot be used.

(U-shaped groove fixing process: (2) Filling material filling process)
Next, as a U-shaped groove fixing step, a filling material filling step is performed in which the cage frame 31 assembled in the cage mounting step is filled with a filling material such as gravel or earth and sand.

Specifically, the cage frame 31 is lined with a sheet material such as a vegetation sheet, filled with local stones and gravel, and then compacted by rolling with a rammer or compaction machine. Note that depending on the specifications and condition of the filling material, there are cases in which the inner lining with sheet material is not provided, or in which compaction is not performed.

(U-shaped groove fixing process: (3) cage fixing process)
Then, as a U-shaped groove fixing process, a cage body fixing process of fixing the cage frame 31 to the slope G2 is performed. This cage fixing step may be performed before the above-mentioned (2) stuffing material filling step, or may be performed simultaneously with assembling the cage frame 31 in the (1) cage mounting step.

Specifically, in this step, the above-mentioned hooked stake 13' made of the steel rod is hammered into the slope G2, and any of the round bars 32 of the car frame 31 is hooked with the hook of the hooked stake 13'. to fix the car frame 31 to the slope G2.

Note that (3) the cage fixing step can be omitted if the installation surface on which the U-shaped groove is installed is the ground surface G1 with a gentle slope as described above. This is because the car frame 31 has a high frictional resistance with the installation surface, and even if it is assumed that the U-shaped groove is washed away by running water, the car frame 31 can counteract it to some extent with its own weight.

Upon completion of these U-shaped groove fixing steps, the filling material is filled and reaches a certain level of weight, and the U-shaped groove U2 is sandwiched and fixed to the basket frame 31, which has become an independent fixed object. The U-shaped groove U2 is supported by the car frame 31.

(Connection process)
Further, the U-shaped groove U2 and the car frame 31 can be easily connected in a short time by using reinforcing bars bent to form hooks as a connecting member. By performing the connecting step, the U-shaped groove U2 can be more firmly fixed and supported. Of course, the connecting step can also be omitted.

In this way, the U-shaped groove installation work according to the U-shaped groove installation method according to the third embodiment is completed, and as shown in FIGS. 7 and 8, the U-shaped groove structure 30 is constructed on the slope G2. be done. Note that in the above example, the U-shaped groove was first placed on the installation surface, and then the car frame was installed on both sides of the U-shaped groove. Alternatively, a U-shaped groove may be installed in the space. Alternatively, first install one row of basket frames, then place the U-shaped groove on the installation surface while leaning against the basket frame, and then install one row of basket frames with the U-shaped groove in between. May be placed. That is, in the present invention, if each step of the installation method exists, the order of the steps can be changed.

According to the U-shaped groove installation method according to the third embodiment described above, in addition to the above-mentioned effects, by using the cage frame 31 as a fixed object when fixing the U-shaped groove U2, material transportation is improved. This improves construction efficiency and shortens the construction period. Moreover, by using the cage frame 31, the shape can be maintained for a long period of time, and long-term stability and durability are improved.

Furthermore, according to the method for installing a U-shaped groove according to the third embodiment, since local stones and gravel are used, installation can be performed relatively inexpensively, and cost reduction can be achieved by lowering material costs. .

[Fourth embodiment]
Next, a method for installing a U-shaped groove according to a fourth embodiment of the present invention will be described using FIGS. 9 to 12. FIG. 9 is a vertical sectional view showing a U-shaped groove structure 40 installed by the U-shaped groove installation method according to the fourth embodiment of the present invention, and FIG. 10 is a side view showing the U-shaped groove structure 40. . Moreover, FIG. 11 is a process explanatory diagram showing a U-shaped groove installation step of the U-shaped groove installation method according to the fourth embodiment, and FIG. 12 is a process explanatory diagram showing the U-shaped groove installation method according to the fourth embodiment. It is a process explanatory diagram which shows a ground leveling process and a cage mounting process.

The U-shaped groove installation method according to the fourth embodiment includes the above-mentioned U-shaped groove U2 made of the corrugated steel plate, and the above-mentioned cage frame 31 which is a fixed object that stands on its own on the installation surface of the U-shaped groove U2. The U-shaped groove structure 40 will be explained by exemplifying a case where the slope G2 is leveled into a stepped shape so that the car frame 31 can be placed horizontally.

(U-shaped groove placement process)
In the U-shaped groove installation method according to the fourth embodiment of the present invention, as in the U-shaped groove installation method according to the third embodiment described above, first, as shown in FIG. A U-shaped groove mounting step is performed in which the substrate is placed on the slope G2, which is a surface. At this time, in this step, the U-shaped groove U2 is simply placed on the slope G2 as it is along the slope G2 on which the U-shaped groove U2 is installed.

Note that if the installation surface is uneven, some amount of heaping or adjustment may be required to the installation surface when placing the U-shaped groove, but this embodiment is suitable for this level of land leveling work. shall be included. That is, in the present invention, placing the U-shaped groove as it is on the slope G2 means that there is no need for large excavation to accommodate the U-shaped groove main body on the slope G2, and various modifications may be made without departing from this spirit. It is possible. Further, although not shown, at this time, by temporarily fixing the U-shaped groove U2 to the slope G2 with the stakes 13 shown in FIG. 1, etc., it is possible to prevent the U-shaped groove U2 from falling sideways.

(U-shaped groove fixing process: (1) Land leveling process)
Next, in the U-shaped groove installation method according to the fourth embodiment, a U-shaped groove fixing step is performed in which the U-shaped groove U2 is fixed to the slope G2 of the ground, which is the installation surface. However, in the U-shaped groove installation method according to the fourth embodiment, the U-shaped groove fixing step is different from the U-shaped groove fixing step of the U-shaped groove installation method according to the third embodiment described above. As a pre-process to the mounting process, (1) a ground leveling process is performed. In other words, the U-shaped groove fixing process of the U-shaped groove installation method according to the fourth embodiment includes three steps: (1) leveling process, (2) cage mounting process, and (3) filling material filling process. The above-mentioned cage fixing process is not performed.

In the U-shaped groove installation method according to the fourth embodiment, (1) ground leveling is first performed as the U-shaped groove fixing step. In this step, as shown in FIG. 12, the slopes G2 on both sides of the U-shaped groove U2 placed in the U-shaped groove mounting step are graded into a stepped slope G3. At this time, the area of the horizontally leveled plane part of the stepped slope G3 is made smaller than the horizontal projected area of the car frame 31, and a part of the upper car frame 31 covers a part of the lower car frame 31. Do it like this.

In the initial movement when the car frame 31 slides down the slope G2, the upper car frame 31 prevents the mountain side of the slope of the car frame 31 from jumping up, thereby preventing the car frame 31 from sliding down the slope G2. It's for a reason.

This step may be performed using heavy equipment or may be performed manually. At this time, the area where the ground is leveled horizontally in this step is a limited area that is less than half the volume of the car frame 31, which will be described later. Therefore, even if the gradient of the slope G2 is so large that heavy machinery cannot be used for the work, the work is not very hard. Moreover, the earth and sand generated during land leveling can be used in the filling process (2) described below, and there is no cost involved in disposing of the remaining earth.

Note that this step may be performed before the U-shaped groove mounting step. By doing so, the scaffold becomes flat and the workability of various operations such as the operation of connecting the U-shaped grooves U2 to each other is improved.

(U-shaped groove fixing process: (2) Cage mounting process)
(2) In the cage mounting process, as shown in FIG. 12, the cage frame 31 is assembled on the stepped slope G3 leveled in the (1) land leveling process, and the cage frame 31, which is a fixed object, is moved onto the stepped slope G3. Place it on top. Of course, it goes without saying that the car frame 31 may be assembled in advance at another location and then suspended and placed on the stepped slope G3.

(U-shaped groove fixing process: (3) Filling material filling process)
Next, as a U-shaped groove fixing step, a filling material filling step is performed in which the cage frame 31 assembled in the cage mounting step is filled with a filling material such as gravel or earth and sand.

Specifically, the cage frame 31 is lined with a sheet material such as a vegetation sheet, filled with local stones and gravel, and then compacted by rolling with a rammer or compaction machine. Note that depending on the specifications and condition of the filling material, there are cases in which the inner lining with sheet material is not provided, or in which compaction is not performed.

Upon completion of these U-shaped groove fixing steps, the filling material is filled and reaches a certain level of weight, and the U-shaped groove U2 is sandwiched and supported by the car frame 31, which has become an independent fixed object. Fixed.

(Connection process)
Next, in the U-shaped groove installation method according to the fourth embodiment, a connecting step of connecting the U-shaped groove U2 and the car frame 31 is performed.

Specifically, as shown in FIGS. 9 and 10, an anchor 41 made of steel with a J-shaped hook formed at the lower end is bolted to the flange 22 of the U-shaped groove U2, and the J-shaped hook of the anchor 41 is fixed to the flange 22 of the U-shaped groove U2. It is hung on the round steel 32 of the basket frame 31.

In this process, the anchor 41 may be attached to the flange 22 of the U-shaped groove U2 in advance before the U-shaped groove mounting process, or the cage frame 31 may be assembled in the cage body mounting process after the ground leveling process. It may be done in parallel.

In this way, the installation work of the U-shaped groove according to the U-shaped groove installation method according to the fourth embodiment is completed, and as shown in FIGS. 9 and 10, the U-shaped groove structure 40 has a slope G2 and a stepped shape Constructed on slope G3. Note that in the above example, the U-shaped groove was first placed on the installation surface, and then the car frame was installed on both sides of the U-shaped groove. Alternatively, a U-shaped groove may be installed in the space. Alternatively, first install one row of basket frames, then place the U-shaped groove on the installation surface while leaning against the basket frame, and then install one row of basket frames with the U-shaped groove in between. May be placed. That is, in the present invention, if each step of the installation method exists, the order of the steps can be changed.

According to the U-shaped groove installation method according to the fourth embodiment described above, the ground leveling process is performed, and the slopes G2 on both sides of the U-shaped groove U2 placed in the U-shaped groove mounting process are graded in a step-like manner. Since the step-like slope G3 is formed by stacking the car frames in a step-like manner, it is possible to prevent the car frame 31 from falling down on the slope G2.

Further, according to the U-shaped groove installation method according to the fourth embodiment, the stepped slope G3 and the stepped car frame 31 are constructed on both sides of the U-shaped groove U2, so they are used as a flat work scaffold. This improves the workability of various operations such as connecting the U-shaped grooves U2 and assembling the car frame 31, replacing the U-shaped grooves U2, and inspecting the U-shaped grooves U2.

Above, the U-shaped groove installation method according to the first to fourth embodiments of the present invention and the U-shaped groove structures 10, 20, 30, and 40 installed by the installation method have been described in detail. However, the above-mentioned or illustrated embodiments are merely illustrative of specific embodiments for carrying out the present invention, and the technical scope of the present invention should not be construed as limited by the illustrated embodiments. This is something that must not be done.

In particular, the U-shaped groove made of hot-dip galvanized steel plate has been described as an example, but the U-shaped groove according to the present invention can also be made of other corrosion-resistant steel plates or stainless steel plates. . Although the product unit price is higher, durability is improved, which is preferable depending on the application. Further, even if the U-shaped groove is made of a stainless steel plate, plating or painting may be performed.

In addition, in the present invention, since the U-shaped groove is placed on the installation surface, when changing an existing U-shaped groove to the U-shaped groove structure according to the present invention, the drainage basin (collection basin) connected to the U-shaped groove is Since the connection part with the drainage basin (water basin) is located higher than before, it is necessary to raise the height of the drainage basin. However, due to the increase in the amount of rainfall per hour at the time of design, an increase in drainage capacity is required, so raising the height of the drainage basin is also planned, and there is no disadvantage in this point.

10, 10', 20, 30, 40: U-shaped groove structure U1, U2: U-shaped groove 11, 21: U-shaped flume body 11a: Fixing hole 21a: Long hole 12, 22: Flange 12a: Bolt hole 13: Pile 13a: Head 13': Pile with hook 14: Strut (protrusion suppression member)
23: Fixed object 31: Basket frame (cage body: fixed object)
32: Round steel 33: Welded wire mesh 41: Anchor G1: Ground surface (installation surface)
G2: Slope (installation surface)
G3: Stepped slope

Claims (6)

A U-shaped groove installation step in which a U-shaped groove having a substantially U-shaped cross section is placed on the ground surface as an installation surface without excavating the ground surface ;
a U-shaped groove fixing step of fixing the U-shaped groove to the installation surface in a state where it is exposed above the ground surface ;
Furthermore, in the U-shaped groove fixing step, a self-supporting cage fixture is installed on both sides of the U-shaped groove to sandwich the U-shaped groove, and the U-shaped groove is fixed by the weight of the fixture, The method includes a step of installing a fixed object to support the U-shaped groove.
A method for installing a U-shaped groove characterized by: A claim characterized in that the fixed object installation step includes a cage mounting step of placing the cage on the installation surface, and a filling material filling step of filling the cage with gravel or earth and sand. The method for installing the U-shaped groove described in Item 1 . The installation surface is a slope,
The fixed object installation step includes a cage mounting step of placing the cage on the slope, a filling material filling step of filling the cage with gravel or earth, and a step of fixing the cage on the slope. The method for installing a U-shaped groove according to claim 1 , further comprising a cage fixing step. The installation surface is a slope,
The fixed object installation step includes a step of leveling the slopes on both sides on which the U-shaped groove is placed in a step-like manner, and a step of placing the cage body on the step-like slope leveled in the step-like step in the step of leveling the ground. The method for installing a U-shaped groove according to claim 1 , comprising a placing step and a filler filling step of filling the cage with gravel or earth and sand. Equipped with a U-shaped groove with a roughly U-shaped cross section made of steel plate,
A U-shaped groove structure installed by the U-shaped groove installation method according to any one of claims 1 to 4 . Equipped with a U-shaped groove made of resin and having a roughly U-shaped cross section,
A U-shaped groove structure installed by the U-shaped groove installation method according to any one of claims 1 to 4 .

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