JP2021143506A - Installation method of u-shaped groove and u-shaped groove structure - Google Patents

Abstract

To provide the installation method of a U-shaped groove shortened in a construction period by dispensing with excavation work and reduced in cost by reducing countermeasures for resisting against soil pressure, and a U-shaped groove structure.SOLUTION: In the installation method of a U-shaped groove U1, the steps of: placing a U-shaped groove U1 with a roughly U-shaped cross section on an installation face (ground level G1) as it is; and fixing the U-shaped groove on the installation face are performed.SELECTED DRAWING: Figure 2

Description

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

Conventionally, a U-shaped groove is known as a civil engineering material used for waterways, drainage channels, and the like. As the material used for the U-shaped groove, concrete, synthetic resin, and steel are generally used. In general, as a method of installing a U-shaped groove (construction method), a groove is made by excavating the ground surface on which water is to be moved or flowed down, a U-shaped groove is installed there, and then a U-shaped groove is installed. The ground surface is compacted so that there is no gap between the groove and the excavated surface.

For example, as a U-shaped groove made of concrete, in Patent Document 1, from the bottom surface 11 at a predetermined intermediate position in the longitudinal direction 20 in any one or both of the facing side walls 12 erected substantially vertically from the bottom surface 11. A substantially U-shaped concrete flume 10 in which a slope portion 13 having a predetermined width inclined outward as it goes upward is formed (paragraphs [0020] to [0026] of the specification of Patent Document 1]. , See FIGS. 1 to 5 of the drawing).

In the U-shaped groove described in Patent Document 1, the ground surface is excavated to form a groove, and the concrete flume 10 is installed therein. In this U-shaped groove, organisms living around the waterway may fall into the U-shaped groove, but by having the slope portion 13, the organisms that have fallen using this slope portion 13 escape by themselves. It is possible to do.

Further, as the U-shaped groove made of resin, Patent Document 2 includes a groove body 12 using synthetic resin as a main raw material and having a bottom wall 14 and side walls 16 rising from both side ends in the width direction of the bottom wall. At the bottom, a U-shaped groove 10 to which an earth pressure receiving portion 34 projecting in the width direction and extending in the longitudinal direction is connected is disclosed (paragraphs [0041] to [0060] of the specification of Patent Document 2, in the drawings. See FIGS. 1, 10 and so on).

Similar 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 to form a groove, and the U-shaped groove 10 is set there. In this U-shaped groove 10, earth pressure acts on the side wall and the side wall tries to collapse inward, but the collapse can be reduced by locking the earth pressure receiving portion by the ground. Is.

The steel U-shaped groove is made of a corrugated steel plate according to Patent Document 3 proposed by the applicant of the present application, and when designing the corrugated shape of the corrugated steel plate, the bottom portion is formed from the outer surfaces of both side walls. A corrugated steel plate flume that sets the length of the straight bottom and the depth of the wave so that the total buckling equivalent pressure when buckling due to the external pressure acting horizontally and the yield stress when yielding due to the external pressure are equal. 1 is disclosed (see paragraphs [0022] to [0039] of the specification of Patent Document 3, FIGS. 1 to 7 of the drawings, etc.).

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

On the other hand, in recent years, due to the frequent occurrence of heavy rain disasters, when designing drainage channels and the like, there are increasing cases where the amount of rainfall per hour is higher than before. At this time, the required drainage capacity cannot be secured in the existing drainage channel, and a new U-shaped groove or the like will be added. There are a considerable number of areas to be dealt with, and prompt action is required to prevent repeated heavy rain disasters.

However, in the conventional U-shaped grooves as described in Patent Documents 1 to 3, regardless of the material, a construction method is adopted in which the ground surface is excavated to form a groove and the U-shaped groove is installed there. .. In particular, when a U-shaped groove is newly installed on an embankment slope or a cut slope of an existing road, heavy machinery cannot be inserted and manual excavation is required on the slope, so it is a considerable effort to dig a groove to accommodate the U-shaped groove. There was a problem that the construction did not proceed easily.

In addition, since the conventional U-shaped groove was installed by excavating the ground surface, earth pressure acts on the side surface of the U-shaped groove. Therefore, in the case of concrete, the thickness of the U-shaped groove is increased. In the case of synthetic resin or steel, it is necessary to add waviness, ribs, etc., which causes a problem that the cost of the material is increased.

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

Therefore, the present invention has been devised in view of the above-mentioned problems, and the purpose of the present invention is to eliminate the excavation work, shorten the construction period, reduce the risk of accidentally falling by a person, and reduce the risk of accidentally falling. It is an object of the present invention to provide a U-shaped groove installation method and a U-shaped groove structure capable of achieving cost reduction by reducing measures for countering earth pressure.

The method for installing the U-shaped groove according to the first invention includes a U-shaped groove mounting step in which the U-shaped groove having a substantially U-shaped cross section is placed on the installation surface as it is, and the U-shaped groove is fixed to the installation surface. It is characterized by having a U-shaped groove fixing step.

The method for installing a U-shaped groove according to the second invention is the method for installing a U-shaped groove according to the first invention. It is characterized by having an installation process.

Regarding the method of installing the U-shaped groove according to the third invention, in the second invention, the fixed object installation step includes a basket body mounting step of placing the basket body on the installation surface and stone gravel or earth and sand on the basket body. It is characterized by having a filling material filling step of filling.

In the second invention, the method for installing the U-shaped groove according to the fourth invention is that the installation surface is a slope, and the fixed object installation step includes a basket body mounting step of placing the basket body on the slope. It is characterized by having a filling material filling step of filling the basket with gravel or earth and sand, and a basket fixing step of fixing the basket on the slope.

In the second invention, the method for installing the U-shaped groove according to the fifth invention is that the installation surface is a slope, and in the fixed object installation step, the slopes on both sides on which the U-shaped groove is placed are stepped. A ground preparation step for leveling the ground, a cage placement step for placing the cage on a stepped slope that has been stepped in the ground preparation step, and a filling material filling step for filling the basket with gravel or earth and sand. It is characterized by having.

The U-shaped groove structure according to the sixth invention is provided with a U-shaped groove having a substantially U-shaped cross section made of a steel plate, and is installed by the method for installing the U-shaped groove according to any one of claims 1 to 5. It is characterized by.

The U-shaped groove structure according to the seventh invention is provided with a U-shaped groove having a substantially U-shaped cross section made of resin, and is installed by the method for installing the U-shaped groove according to any one of claims 1 to 5. It is characterized by.

According to the first to seventh inventions, since the U-shaped groove can be installed without excavating the ground surface which is the installation surface, the construction period can be significantly shortened and the construction cost can be reduced. Further, according to the first to seventh inventions, since the U-shaped groove is installed on the ground surface which is the installation surface, the earth pressure does not act on the side surface of the U-shaped groove, and the earth pressure is resisted. It is not necessary to add thickening, corrugation, ribs, etc., and it is possible to achieve a cost reduction of the entire U-shaped groove construction by reducing the material cost.

In particular, according to the second 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 U-shaped. Even if it acts on the side surface of the groove, the protrusion of the U-shaped groove can be suppressed by the self-supporting fixed object.

In particular, according to the third invention, since the basket body is used as a fixing object when fixing the U-shaped groove, the workability is extremely good, cost reduction by shortening the construction period can be achieved, and the shape is maintained for a long period of time. It can improve long-term stability. Further, according to the third invention, since the material used is relatively inexpensive, cost reduction can be achieved in that respect as well.

In particular, according to the fourth invention, even when the installation surface is a slope, it is possible to prevent the danger that the cage body, which is a fixed object, slides down on the slope and moves downward.

In particular, according to the fifth invention, by stacking the basket bodies in a staircase pattern, it is possible to prevent the basket bodies from sliding down on the slope. Further, according to the fifth invention, earth and sand are generated when the installation surface of the basket body is leveled in a stepped manner, and the earth and sand can be used as a filling material for the basket body, and the disposal cost of the earth and sand can be reduced. .. Further, according to the fifth invention, since a stepped cage body is constructed on both sides of the U-shaped groove, the U-shaped groove can be easily installed, replaced, inspected, etc. by using it as a work scaffold. It also has advantages.

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

According to the seventh invention, in addition to the above-mentioned action and effect, by making the U-shaped groove made of resin, the weight can be reduced as compared with the U-shaped groove made of steel plate, the construction speed is further improved, and the construction period is shortened. Cost reduction can be achieved.

FIG. 1 is a vertical cross-sectional view showing a U-shaped groove structure installed by the method for installing a U-shaped groove according to the first embodiment of the present invention. FIG. 2 is a perspective view showing the U-shaped groove structure of the above. FIG. 3 is a vertical cross-sectional view showing a modified example of the U-shaped groove structure installed by the method of installing the U-shaped groove according to the first embodiment. FIG. 4 is a vertical cross-sectional view showing a U-shaped groove structure installed by the method for installing a U-shaped groove 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. FIG. 6 is a side view showing a U-shaped groove structure installed by the method for installing a U-shaped groove according to the second embodiment. FIG. 7 is a vertical cross-sectional view showing a U-shaped groove structure installed by the method for installing a U-shaped groove according to the third embodiment of the present invention. FIG. 8 is a side view showing a U-shaped groove structure installed by the method for installing a U-shaped groove according to the third embodiment. FIG. 9 is a vertical cross-sectional view showing a U-shaped groove structure installed by the method for installing a U-shaped groove according to the fourth embodiment of the present invention. FIG. 10 is a side view showing a U-shaped groove structure installed by the method for installing a U-shaped groove according to the fourth embodiment. FIG. 11 is a process explanatory view showing a U-shaped groove mounting step of the method for installing a U-shaped groove according to the fourth embodiment. FIG. 12 is a process explanatory view showing a ground leveling step and a basket body placing step of the U-shaped groove installation method according to the fourth embodiment.

Hereinafter, the method of installing the U-shaped groove and the method of installing the U-shaped groove according to the embodiment of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
The method of installing the U-shaped groove according to the first embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a vertical cross-sectional view showing a U-shaped groove structure 10 installed by the method for installing a U-shaped groove 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. It is a figure. As shown in FIGS. 1 and 2, in the method of installing the U-shaped groove according to the first embodiment, there is a case where a U-shaped groove structure 10 having a U-shaped groove U1 having a substantially U-shaped cross section made of a steel plate is constructed. It will be described by way of example.

(U-shaped groove mounting process)
In the method for installing a U-shaped groove according to the first embodiment of the present invention, first, a U-shaped groove mounting step of placing the U-shaped groove U1 on the ground surface G1 which is the installation surface is performed. At this time, the U-shaped groove U1 is simply placed on the ground surface G1 as it is. In addition, when there is unevenness on the installation surface, when placing the U-shaped groove, some cutting and adjustment may be performed on the installation surface, but even if this degree of leveling work is performed, this embodiment It shall be included in. That is, in the present invention, the as-is mounting means that a large excavation is not required to accommodate the U-shaped groove main body on the installation surface, and various modifications can be made without departing from this purpose.

On the other hand, in the conventional method of installing a U-shaped groove, regardless of the material of the U-shaped groove, the ground surface G1 of the ground is excavated (excavated) to form a groove, and the U-shaped groove is accommodated in the groove. The method of installation was taken. For this reason, it takes time and labor to dig a groove on the ground surface, which is a factor of cost increase.

In addition, when a U-shaped groove is newly installed on an embankment slope or a cut slope of an existing road, excavation work with heavy machinery cannot be performed on a slope with a large slope, and excavation work is performed manually on the slope. rice field. For this reason, when the installation surface is a slope, it takes a considerable amount of labor to dig a groove having a size capable of accommodating the U-shaped groove, and there is a problem that the construction does not proceed easily.

The U-shaped groove U1 installed in this step is a steel plate having a predetermined thickness (generally, a hot-rolled mild steel plate SPHC) that can withstand the pressure of a fluid (for example, drainage of rainwater or the like) flowing in the groove. An example is a U-shaped fluid made of steel formed from a steel plate having a thickness of about 1.6 mm to 4.0 mm) into a substantially U-shaped cross section. Further, the U-shaped groove U1 is plated by hot-dip galvanizing to prevent rust. Of course, the rust-preventive surface treatment applied to the U-shaped groove U1 may be simply a coating treatment such as a rust-preventive paint.

As shown in FIGS. 1 and 2, the U-shaped groove U1 includes a U-shaped flume body 11 having a substantially U-shaped cross section, a flange 12 extending outward along the upper end edge of the U-shaped flume body 11, and the like. , Consists of. In the illustrated form, the U-shaped flume body 11 and the flange 12 are integrated, but the flange 12 is attached to the U-shaped flume body 11 by attaching an L-shaped angle made of angle steel to the upper end of the U-shaped flume body 11. It can also be separated from.

Of course, the U-shaped groove U1 is not limited to steel, and may be made of concrete or resin. Further, it is preferable that the U-shaped groove U1 is made of a corrugated steel plate that has been subjected to corrugated processing (corrugated processing), as described later, because the steel plate can be thinned over the entire U-shaped groove U1.

(U-shaped groove fixing process)
Next, in the method of installing the U-shaped groove according to the first embodiment, a U-shaped groove fixing step of fixing the U-shaped groove U1 to the ground surface G1 of the ground which is the installation surface is performed. In this embodiment, it is assumed that the ground surface G1 is substantially horizontal or gently slopes in the ground made of earth and sand such as cuts and embankments. 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 cut or embankment, or artificial ground such as concrete paved.

In this step, a nail-shaped head 13a made of a steel rod is provided in the fixing hole 11a formed on the bottom surface of the U-shaped groove U1 placed on the ground surface G1 in the previous step (U-shaped groove mounting step). The pile 13 is driven, pierced into the ground, and fixed. This is to prevent the U-shaped groove U1 from slipping off the ground surface G1 and moving due to the inclination of the ground surface G1 or being swept away by a water stream. The fixing hole 11a is slightly larger than the diameter of the pile 13 and is formed in a hole corresponding to the diameter. Of course, the pile 13 is not limited to a steel material such as a steel rod, and it goes without saying that the pile 13 may be a pile made of any material such as wood or resin.

Further, by interposing a ring-shaped rubber packing (not shown) between the head portion 13a of the pile 13 and the fixing hole 11a, it is possible to prevent the fluid flowing through the U-shaped groove U1 from leaking from these gaps. It is preferable because it can be done.

Further, the head 13a of the pile 13 is used as a round head to reduce the resistance between the head 13a and the fluid, and the fixing hole 11a is used as a counterbore, and the upper surface of the head 13a and the bottom surface of the U-shaped fluid body 11 are used. And may be made to be substantially flush with each other.

As the U-shaped groove fixing step, a case where the pile 13 is driven and fixed in the fixing hole 11a formed on the bottom surface of the U-shaped groove U1 has been described, but as shown in FIG. 3, the U-shaped groove U1 The flanges 12 on both sides of the above may be fixed by stakes 13'with hooks made of steel rods. FIG. 3 is a vertical cross-sectional view showing a U-shaped groove structure 10'corresponding to a modified example installed by the method for installing a U-shaped groove according to the first embodiment. According to the U-shaped groove structure 10'related to the modified example, there is an advantage that it is not necessary to perform the above-mentioned water leakage treatment of the rubber packing or the like.

(Installation process of protrusion suppression member)
Next, in the method of installing the U-shaped groove according to the first embodiment, a protrusion suppressing member is used between the flanges 12 and 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 step is performed in which a certain strut 14 is bridged and installed. When this step is completed, the construction of 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, the bolt B1 is inserted into the bolt holes 12a formed in the flanges 12 and 12, and the struts 14 are bolted between the flanges 12 and 12 to be fixed and installed. Of course, the joining of the strut 14 and the flange 12 is not limited to the bolt joining, and it goes without saying that the strut 14 and the flange 12 may be fixed by rivet joining or welding joining.

The strut 14 shown as the protrusion suppressing member exemplifies an angle steel (L-shaped angle) having L = 50 mm × 50 mm × 4 mm made of rolled steel for general structure (SS400). Of course, the squeeze-out suppressing member according to the present invention is not limited to steel materials such as angle steel and flat bars, and the side surface of the U-shaped flume body 11 bulges outward due to the influence of fluid pressure or the like, and the flanges 12, 12 Any material can be used as long as it can withstand the force that widens the distance between each other.

The protrusion suppressing member installation step may be performed before the above-mentioned U-shaped groove mounting step, and the strut 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 deviated in the longitudinal direction of the U-shaped groove U1, when the pile 13 is driven in the U-shaped groove fixing step, This is because there is no problem.

Further, this step may be omitted and the strut 14 may not be erected between the flanges 12 and 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 enough to counteract the side surface of the U-shaped fluid body 11 swelling outward due to the influence of fluid pressure or the like. be. However, it is preferable that the strut 14 is provided as the protrusion suppressing member because the overall plate thickness of the U-shaped flume main body 11 can be reduced and the material cost can be reduced as compared with the case where the strut 14 is not provided.

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 step, and the U-shaped groove fixing step is performed. The installation work of the U-shaped groove is completed only by fixing the U-shaped groove U1 to the ground surface G1. Therefore, it is possible to reduce the time required for these operations by omitting all the operations of digging a groove that can accommodate the U-shaped groove on the ground surface, which is necessary in the conventional method of installing the U-shaped groove. Therefore, according to the U-shaped groove installation method according to the present embodiment, the installation time can be significantly shortened and a significant cost reduction can be achieved as compared with the conventional U-shaped groove installation method.

Further, according to the method of installing the U-shaped groove 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 surface of the U-shaped groove U1. , It is not necessary to add thickening, corrugation, ribs, etc. to resist earth pressure. Therefore, the U-shaped flume main body 11 can be made thin, and the cost of the material cost of the U-shaped groove U1 can be reduced, so that the cost of the entire U-shaped groove U1 installation work can be reduced.

[Second Embodiment]
Next, a method of installing the U-shaped groove according to the second embodiment of the present invention will be described with reference to FIGS. 4 to 6. FIG. 4 is a vertical cross-sectional view showing a U-shaped groove structure 20 installed by the method for installing a U-shaped groove according to the second embodiment of the present invention, and FIG. 5 is a U-shape of the U-shaped groove structure 20 of FIG. It is a perspective view which shows the groove U2 alone. Further, FIG. 6 is a side view showing the U-shaped groove structure 20. In the method for installing a U-shaped groove according to the second embodiment, a U-shaped groove structure including a U-shaped groove U2 having a substantially U-shaped cross section made of a steel plate and a fixed object that is self-supporting on the installation surface of the U-shaped groove U2. The case where 20 is constructed along the ground surface G1 which is the installation surface will be described as an example.

(U-shaped groove mounting process)
In the method of installing the U-shaped groove according to the second embodiment of the present invention, first, the U-shaped groove U2 is installed on the ground surface G1 which is the installation surface, as in the method of installing the U-shaped groove according to the first embodiment described above. The U-shaped groove mounting step of mounting on the top is performed. At this time, the U-shaped groove U2 is simply placed on the ground surface G1 as it is along the ground surface G1 where the U-shaped groove U2 is installed.

If there is unevenness on the installation surface, some cutting and adjustment may be performed on the installation surface when placing the U-shaped groove. It shall be included. That is, in the present invention, placing on the ground surface G1 as it is means that a large excavation is not required to accommodate the U-shaped groove main body on the ground surface G1, and various types are provided without departing from this purpose. It can be modified. Further, although not shown, at this time, by temporarily fixing the U-shaped groove U2 to the installation surface with the pile 13 or the like shown in FIG. 1, it is possible to prevent the U-shaped groove U2 from falling sideways.

Further, the U-shaped groove U2 installed in this step is a corrugated steel plate (generally, a hot-rolled mild steel plate SPHC having a thickness of 1.6 mm to 4) that has been corrugated (corrugated) at a predetermined pitch. It is a U-shaped flume of a corrugated steel sheet formed by forming a corrugated steel sheet having a substantially U-shaped cross section. The U-shaped groove U2 is also plated with hot-dip galvanizing to prevent rust. Of course, the rust-preventive surface treatment applied to the U-shaped groove U2 may be merely a coating treatment such as a rust-preventive paint.

As shown in FIG. 5, the U-shaped groove U2 is composed of a U-shaped flume main body 21 having a substantially U-shaped cross section, a flange 22 protruding outward along the upper end edge of the U-shaped flume main body 21, and the like. Has been done. In the illustrated form, the U-shaped flume body 21 and the flange 22 are integrated, but the flange 22 is attached to the U-shaped flume body 21 by attaching an L-shaped angle made of angle steel to the upper end of the U-shaped flume body 21. It can also be separated from.

Of course, the U-shaped groove U2 is not limited to steel, and may be made of concrete or resin. Further, the U-shaped groove U2 may be a U-shaped groove U1 that has not been subjected to the above-mentioned waviness processing. Even in that case, it is possible to take appropriate measures according to the design, such as increasing the plate thickness.

Further, for joining the U-shaped grooves U2 and U2 to each other, as shown in FIG. 6, a long hole provided near the center of both ends of the side surface of the U-shaped flume main body 21 in the longitudinal direction by superimposing corrugated steel plates for one mountain. It is bolted (not shown) at 21a. The joints between the U-shaped grooves U2 and U2 are preferably 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 method of installing the U-shaped groove according to the second embodiment, the U-shaped groove fixing step of fixing the U-shaped groove U2 to the ground surface G1 of the ground which is the installation surface is performed. However, in the U-shaped groove setting method according to the second embodiment, the U-shaped groove fixing step is different from the U-shaped groove fixing step of the U-shaped groove setting method according to the first embodiment described above. This is a fixed object installation step in which self-supporting fixed objects 23 are installed on both sides of the groove U2 to support the U-shaped groove U2.

In this fixed object installation step, 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 step, and the U-shaped groove U2 is sandwiched. Then, the U-shaped groove U2 is fixed by the weight of the fixed object 23 to support the U-shaped groove U2.

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

The fixed object 23 installed in this step can be exemplified by a rubber or concrete block 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.

When this step is completed, the construction of 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 grounded. It is built on the surface G1. In the above description, first, the U-shaped groove is placed on the installation surface, and then the fixed objects are installed on both sides of the U-shaped groove. A U-shaped groove may be installed in the space. Alternatively, first install a row of fixed objects, then place a U-shaped groove on the installation surface so that it leans against the fixed object, and then place a row of fixed objects so that the U-shaped groove is sandwiched between them. It may be arranged. That is, in the present invention, if each step of the installation method exists, the order of the steps can be changed.

However, a protrusion suppressing member installation step may be provided, and the strut 14 described above may be bridged between the flanges 12 and 12 of the U-shaped groove U2 and bolted (related to the third and fourth embodiments described later). The same applies to the installation method of the U-shaped groove). By providing the struts 14, the overall plate thickness of the U-shaped flume main body 21 can be further reduced, and the material cost can be reduced, which is preferable.

According to the method for installing the U-shaped groove according to the second embodiment described above, the U-shaped groove fixing step installs the fixed objects 23 and 23 on both sides of the U-shaped groove U2 and sandwiches the U-shaped groove U2. It is only necessary to fix the U-shaped groove U2 with the weight of the fixed object 23. Therefore, in addition to the above-mentioned effects, it is easy to install and fix the U-shaped groove, and it is possible to shorten the work time of the U-shaped groove installation work and reduce the construction cost.

Further, according to the method of installing the U-shaped groove according to the second embodiment, even if the pressure of the fluid flowing through the U-shaped groove U2 acts on the side surface of the U-shaped groove U2, the weight of the fixed object 23 makes the U-shaped groove U2. It is possible to suppress the protrusion. Therefore, the work time of the U-shaped groove installation work can be shortened by omitting the protrusion suppressing member installation step, and the construction cost can be reduced.

[Third Embodiment]
Next, a method of installing the U-shaped groove according to the third embodiment of the present invention will be described with reference to FIGS. 7 and 8. FIG. 7 is a vertical cross-sectional view showing the U-shaped groove structure 30 installed by the method for installing the U-shaped groove according to the third embodiment of the present invention, and FIG. 8 is a side view showing the U-shaped groove structure 30. .. In the method of installing the U-shaped groove according to the third embodiment, the U-shaped groove U2 made of the corrugated steel plate described above and the basket frame 31 which is a fixed object self-supporting on the installation surface of the U-shaped groove U2 are provided. The case where the groove structure 30 is constructed along the slope G2 will be described as an example.

(U-shaped groove mounting process)
In the method of installing the U-shaped groove according to the third embodiment of the present invention, first, the U-shaped groove U2 is placed on the slope G2 which is the installation surface, as in the method of installing the U-shaped groove according to the second embodiment described above. The 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.

If there is unevenness on the installation surface, some cutting and adjustment may be performed on the installation surface when placing the U-shaped groove. It shall be included. That is, in the present invention, the as-is mounting means that a large excavation is not required to accommodate the U-shaped groove main body on the installation surface, and various modifications can be made without departing from this purpose. Further, although not shown, at this time, by temporarily fixing the U-shaped groove U2 to the installation surface with the pile 13 or the like shown in FIG. 1, it is possible to prevent the U-shaped groove U2 from falling sideways.

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

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

As shown in FIGS. 7 and 8, the basket frame 31 (basket body) has a diameter of 13 mm or 9 mm round steel 32 made of steel such as reinforced concrete steel bar (SR235) and general structural rolled steel (SS400). It is a grid-like frame that is a roughly rectangular parallelepiped in which a 6 mm welded wire mesh 33 is combined. The basket frame 31 is generally assembled in a grid-like frame on site, lined with a sheet material in the frame, filled with local earth and sand, and used as a steel retaining wall or the like.

As the basket body according to the present invention, a rectangular parallelepiped basket frame 31 made of a steel rod is illustrated, but in addition, a "jabion" knitted with an iron wire and a "futon basket" formed by forming an iron wire into a square shape can be mentioned. Be done. Further, the basket body according to the present invention may be a basket-shaped body in which a face material made of expanded metal or the like may be assembled into a frame body, and a gap that allows drainage is formed so that the filling material to be filled does not fall off. If so, the material and shape of the basket body can be appropriately selected.

(1) In the basket body mounting step, the basket frame 31 is assembled on the above-mentioned slope G2, and the fixed basket frame 31 is placed on the slope G2. Of course, it goes without saying that the basket frame 31 may be assembled in advance at another place and then suspended and placed on the slope G2. However, when assembled locally, materials can be easily transported without a lifting device, which is 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 of filling the basket frame 31 assembled in the basket body mounting step with a filling material such as stone gravel or earth and sand is performed.

Specifically, the basket frame 31 is lined with a sheet material such as a vegetation sheet, filled with local stone gravel, earth and sand, and then compacted by rolling with a rammer or a compactor. Depending on the specifications and condition of the filling material, the sheet material may not be lined or compacted.

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

Specifically, in this step, a stake 13'with a hook made of the above-mentioned steel rod is struck into the slope G2 with a hammer or the like, and any round steel 32 of the basket frame 31 is hooked with the hook of the stake 13'with a hook. The basket frame 31 is fixed to the slope G2.

The step of fixing the cage body (3) can be omitted when the installation surface on which the U-shaped groove is installed is the ground surface G1 having a gentle slope as described above. This is because the basket 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 or the like, the weight of the basket frame 31 can counteract to some extent.

At the end of these U-shaped groove fixing steps, the U-shaped groove U2 is sandwiched and fixed to the basket frame 31 which is filled with the filling material, reaches a certain weight, and becomes a self-supporting fixed object. The U-shaped groove U2 is supported by the basket frame 31.

(Connecting process)
Further, the U-shaped groove U2 and the basket frame 31 can be easily connected in a short time by using a reinforcing bar formed by bending to form a hook as a connecting member. By performing the connecting step, the U-shaped groove U2 can be fixed and supported more firmly. Of course, the connecting step can be omitted.

In this way, the construction of 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. Will be done. In the above description, first, the U-shaped groove is placed on the installation surface, and then the basket frames are installed on both sides of the U-shaped groove. 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 so that it leans against the basket frame, and then place one row of basket frames so as to sandwich the U-shaped groove. It may be arranged. 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 method for installing the U-shaped groove according to the third embodiment described above, in addition to the above-mentioned effects, the material can be transported by using the basket frame 31 as a fixing object when fixing the U-shaped groove U2. The workability is improved and the construction period can be shortened. Further, by using the basket frame 31, the shape can be maintained for a long period of time, and the long-term stability and durability are improved.

Moreover, according to the U-shaped groove installation method according to the third embodiment, since local stone gravel and earth and sand are used, it can be installed at a relatively low cost, and the material cost can be reduced to achieve cost reduction. ..

[Fourth Embodiment]
Next, a method of installing the U-shaped groove according to the fourth embodiment of the present invention will be described with reference to FIGS. 9 to 12. FIG. 9 is a vertical cross-sectional view showing the U-shaped groove structure 40 installed by the method for installing the U-shaped groove according to the fourth embodiment of the present invention, and FIG. 10 is a side view showing the U-shaped groove structure 40. .. Further, FIG. 11 is a process explanatory view showing a U-shaped groove mounting process of the U-shaped groove installation method according to the fourth embodiment, and FIG. 12 is a process explanatory view showing the U-shaped groove installation method according to the fourth embodiment. It is a process explanatory drawing which shows the ground leveling process and the basket body placing process.

The method for installing the U-shaped groove according to the fourth embodiment includes the above-mentioned U-shaped groove U2 made of a corrugated steel plate and the above-mentioned basket frame 31 which is a fixed object that stands on the installation surface of the U-shaped groove U2. The case where the U-shaped groove structure 40 is constructed after the slope G2 is leveled in a stepped manner so that the basket frame 31 can be placed horizontally will be described as an example.

(U-shaped groove mounting process)
In the method of installing the U-shaped groove according to the fourth embodiment of the present invention, as shown in FIG. 11, first, the U-shaped groove U2 is installed in the same manner as the method of installing the U-shaped groove according to the third embodiment described above. A U-shaped groove mounting step of mounting on the slope G2, which is a surface, is performed. 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.

If there is unevenness on the installation surface, some cutting and adjustment may be performed on the installation surface when placing the U-shaped groove. It shall be included. That is, in the present invention, placing on the slope G2 as it is means that a large excavation is not required to accommodate the U-shaped groove main body on the slope G2, and various modifications can be made without departing from this purpose. It is possible. Further, although not shown, at this time, by temporarily fixing the U-shaped groove U2 to the slope G2 with the pile 13 or the like shown in FIG. 1, it is possible to prevent the U-shaped groove U2 from falling sideways.

(U-shaped groove fixing process: (1) Ground leveling process)
Next, in the method of installing the U-shaped groove according to the fourth embodiment, the U-shaped groove fixing step of fixing the U-shaped groove U2 to the slope G2 of the ground which is the installation surface is performed. However, in the U-shaped groove setting 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 setting method according to the third embodiment described above, and the basket body. As a pre-process of the mounting process, (1) the ground leveling process is performed. That is, the U-shaped groove fixing step of the U-shaped groove installation method according to the fourth embodiment consists of three steps: (1) ground leveling step, (2) basket body mounting step, and (3) filling material filling step. The above-mentioned cage fixing step is not performed.

In the method of installing the U-shaped groove 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 placing step are leveled in a stepped manner to form a stepped slope G3. At this time, the area of the horizontally leveled flat surface portion of the stepped slope G3 is made smaller than the horizontally projected area of the basket frame 31, and a part of the upper basket frame 31 covers a part of the lower basket frame 31. To do so.

In the initial movement when the basket frame 31 slides down on the slope G2, the upper basket frame 31 prevents the mountain side of the inclined surface of the basket frame 31 from jumping up so that the basket frame 31 does not slide down the slope G2. Because.

This step may be performed using a heavy machine or may be performed manually. At this time, the portion to be leveled horizontally in this step is a limited range of less than half the volume of the basket frame 31, which will be described later. Therefore, even if the slope G2 has a large slope and it is not possible to work with heavy machinery, it does not cause much hard work. In addition, the earth and sand generated in the ground leveling can be used in the filling material filling step (2) described later, and there is no cost for disposing of the residual soil.

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

(U-shaped groove fixing process: (2) Basket body mounting process)
(2) In the basket body mounting step, as shown in FIG. 12, (1) the basket frame 31 is assembled on the stepped slope G3 leveled in the ground leveling step, and the basket frame 31 which is a fixed object is placed on the stepped slope G3. Place on top. Of course, it goes without saying that the basket frame 31 may be assembled in advance at another place 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 of filling the basket frame 31 assembled in the basket body mounting step with a filling material such as stone gravel or earth and sand is performed.

Specifically, the basket frame 31 is lined with a sheet material such as a vegetation sheet, filled with local stone gravel, earth and sand, and then compacted by rolling with a rammer or a compactor. Depending on the specifications and condition of the filling material, the sheet material may not be lined or compacted.

At the end of these U-shaped groove fixing steps, the U-shaped groove U2 is sandwiched and supported by the basket frame 31 which is filled with the filling material, reaches a certain weight, and becomes a self-supporting fixed object. It is fixed.

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

Specifically, as shown in FIGS. 9 and 10, an anchor 41 made of a steel material having 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 attached. Hook on the round steel 32 of the basket frame 31.

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

In this way, the construction of the U-shaped groove installation work 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. It is built on the slope G3. In the above description, first, the U-shaped groove is placed on the installation surface, and then the basket frames are installed on both sides of the U-shaped groove. 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 so that it leans against the basket frame, and then place one row of basket frames so as to sandwich the U-shaped groove. It may be arranged. 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 method for installing the U-shaped groove according to the fourth embodiment described above, the ground leveling step is performed, and the slopes G2 on both sides of the U-shaped groove U2 placed in the U-shaped groove mounting step are leveled in a staircase pattern. Since the stepped slope G3 is formed, by stacking the basket frames in a staircase pattern, it is possible to prevent the basket frame 31 from falling on the slope G2.

Further, according to the method of installing the U-shaped groove according to the fourth embodiment, the stepped slope G3 and the stepped basket frame 31 are constructed on both sides of the U-shaped groove U2, so that they can be used as a flat work scaffold. The workability of various operations such as connecting the U-shaped groove U2 and assembling the basket frame 31, replacement of the U-shaped groove U2, inspection, and the like is improved.

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 above. However, the above-mentioned or illustrated embodiments are merely shown as one embodiment embodied in carrying out the present invention, and the technical scope of the present invention is limitedly interpreted by the illustrated embodiments. It should not be.

In particular, the U-shaped groove made of a hot-dip galvanized steel plate has been described as an example, but the U-shaped groove according to the present invention may be made of another corrosion-resistant steel plate or a stainless steel plate. .. The unit price of the product is high, but the durability is improved, which is preferable depending on the application. Further, even a U-shaped groove made of a stainless steel plate may be plated or painted.

In the present invention, since the U-shaped groove is placed on the installation surface, when the existing U-shaped groove is changed to the U-shaped groove structure according to the present invention, the drainage basin (collection) connected to the U-shaped groove is connected. Since the connection part with the water basin) is higher than before, it becomes necessary to raise the drainage basin. However, since the drainage capacity is required to be increased due to the increase in rainfall per hour at the time of design, it is inevitably planned to raise the drainage basin as well, and it is considered that there is no demerit in that respect.

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': Hooked pile 14: Strut (protrusion suppression member)
23: Fixed object 31: Basket frame (basket 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 (7)

A U-shaped groove mounting process in which a U-shaped groove having a substantially U-shaped cross section is placed on the installation surface as it is, and
A method for installing a U-shaped groove, which comprises a U-shaped groove fixing step of fixing the U-shaped groove to the installation surface. The U-shaped groove according to claim 1, wherein the U-shaped groove fixing step includes a fixed object installation step of installing independent fixed objects on both sides of the U-shaped groove to support the U-shaped groove. Installation method. The fixed object installation step is characterized by including a basket body mounting step of placing the basket body on the installation surface and a filling material filling step of filling the basket body with gravel or earth and sand. Item 2. The method for installing a U-shaped groove according to Item 2. The installation surface is a slope,
The fixed object installation step includes a basket body placing step of placing the basket body on the slope, a filling material filling step of filling the basket body with gravel or earth and sand, and fixing the basket body on the slope. The method for installing a U-shaped groove according to claim 2, further comprising a basket body fixing step. The installation surface is a slope,
The fixed object installation step includes a ground leveling step of leveling the slopes on both sides on which the U-shaped groove is placed in a stepped manner, and a cage body in which the cage is placed on a stepped slope prepared in a stepped manner in the ground leveling step. The method for installing a U-shaped groove according to claim 2, further comprising a mounting step and a filling material filling step of filling the cage with gravel or earth and sand. It has a U-shaped groove with a substantially U-shaped cross section made of steel plate.
A U-shaped groove structure characterized in that it is installed by the method for installing a U-shaped groove according to any one of claims 1 to 5. It has a U-shaped groove with a substantially U-shaped cross section made of resin.
A U-shaped groove structure characterized in that it is installed by the method for installing a U-shaped groove according to any one of claims 1 to 5.

Images