JP5457210B2 - Steel frame for sabo structure, sabo structure constructed thereby, and construction method thereof - Google Patents

Description

  The present invention relates to a steel frame for a sabo structure, a sabo structure constructed thereby, and a construction method thereof, in particular, a construction construction period can be shortened and a construction cost can be reduced, and also against sediment and debris flow. The present invention relates to a steel frame for a sabo structure having high strength, a sabo structure constructed thereby, and a construction method thereof.

  Conventionally, sabo structures of various structures have been constructed in rivers and mountain streams to stop sediment and debris flows that flow down from the upstream due to earthquakes, torrential rain, and the like.

  An example of a steel frame for a sabo structure that constitutes a sabo structure and a method of constructing a sabo structure using this steel frame is disclosed in Patent Document 1 (Japanese Patent Application Laid-Open No. 2004-257150). Hereinafter, this steel frame for a sabo structure will be referred to as a conventional steel frame and will be described with reference to the drawings.

  10 is a perspective view showing a conventional steel frame A, FIG. 11 is a perspective view showing a frame member constituting the conventional steel frame A, and FIG. 12 is a partially omitted view showing a connection structure of the conventional steel frame A. FIG. 13 is a partially omitted side view showing a sabo structure constructed using a conventional steel frame.

  As shown in FIG. 10, the conventional steel frame A is obtained by joining steel frame members 6 made of angle steel as shown in FIG. It is composed of A large number of bolt holes 6a are opened in the frame member 6, and the conventional steel frames A can be connected to each other.

  In order to construct a sabo structure using the conventional steel frame A, first, as shown in FIG. 13, a concrete foundation 8 is constructed after excavating the construction ground 7 for the sabo structure. Next, the conventional steel frames A are stacked side by side on the foundation 8, and the filling material 9 such as earth and sand or concrete is put into the conventional steel frames A. As shown in FIG. 12, the conventional steel frames A are rigidly connected by passing the high-strength bolt 10 through the bolt hole 6 a and fastening the nut 12 via the joint plate 11. In this way, a sabo structure is constructed by a large number of conventional steel frames A.

Japanese Patent Laid-Open No. 2004-257150

  According to the above-described conventional steel frame A, it is possible to construct a sabo structure by stacking a large number of small conventional steel frames A, so that it is difficult to carry large materials or carry large heavy machinery. Even in a mountainous area, etc., there is an advantage that a sabo structure can be constructed relatively easily.

However, the conventional steel frame A has the following problems.
(A) Although the conventional steel frame A manufactured in a factory is small in size and has a certain size and weight, time and labor are required for transportation and construction.
(B) Conventional steel frames A are rigidly connected to each other with high-strength bolts 10 and integrated to construct a sabo structure. Therefore, the construction ground 7 of the structure is excavated, and the concrete foundation 8 is placed on the ground 7. Need to build. Therefore, it costs money to construct the structure and the construction period is long.

  Therefore, the object of the present invention is to solve the problems of the conventional steel frame A, shorten the construction period of the structure and reduce the construction cost, and have high strength against debris flow. An object of the present invention is to provide a steel frame for a sabo structure and a method for constructing a sabo structure using the steel frame.

  The present invention has been made to achieve the above object, and is characterized by the following.

  The invention according to claim 1 is a steel frame for a sabo structure made of three-dimensionally assembled steel materials. The steel frame includes an upper frame and a lower frame, and the upper frame and the lower frame are connectable. , It is characterized in that the filling material is put inside.

  The invention according to claim 2 is characterized in that, in the steel frame for sabo structure according to claim 1, the connected upper frame and lower frame form a rectangular parallelepiped.

  The invention described in claim 3 is characterized in that in the steel frame for a sabo structure according to claim 1 or 2, the upper frame and the lower frame are made of a steel pipe and are flanged to each other. Is.

  The invention described in claim 4 is characterized in that in the steel frame for a sabo structure according to claim 1 or 2, the upper frame and the lower frame are made of a shape steel and are flange-coupled to each other. It is what you have.

Invention of claim 5, the steel used Sabo structure for steel frame consisting of those partnered sterically, the steel frame, without drilling a ground for embedment, more Sabo structure can be connected in the construction method of sabo structure which is placed on the ground without placing the foundation, and the filling material is put into the steel frame and stacked. The upper frame is composed of an upper frame and a lower frame, and all or part of the filling material is put into the lower frame, and then the upper frame is connected to the lower frame .

The invention according to claim 6 uses a steel frame for a sabo structure made of three-dimensionally assembled steel materials, and without excavating the ground for piercing the steel frame, Sabo structure can be connected in the construction method of sabo structure which is placed on the ground without placing the foundation, and the filling material is put into the steel frame and stacked. It comprises an upper frame and a lower frame, and is characterized in that after filling the upper frame and the lower frame, filling material is put into the steel frame .

The invention according to claim 7 is characterized in that, in the construction method of the sabo structure according to claim 5 or 6 , the shape after the connection between the upper frame and the lower frame is a rectangular parallelepiped. .

According to an eighth aspect of the present invention, in the method for constructing a sabo structure according to any one of the fifth to seventh aspects, the upper frame and the lower frame are formed of a steel pipe and are flange-coupled to each other. It has characteristics.

The invention according to claim 9 is characterized in that, in the construction method of the sabo structure according to any one of claims 5 to 8 , the steel frames are loosely connected to each other by a connecting means or a connecting method. Is.

  According to the present invention, the following effects are brought about.

  (1) The steel frames that make up the sabo structure, which are filled with local boulders and other filling materials, are not rigidly connected to each other, but each one of the steel frames that behave apart. It consists of a body, and basically each steel frame functions as a sabo dam. That is, for example, a steel frame into which boulders are introduced has the same function as boulders naturally present in the valley. Therefore, since large-scale foundation work is not required, the construction period of the structure can be shortened and the construction cost of the structure can be reduced, and the structure has high strength against debris flow.

  (2) By configuring the steel frame with an upper frame and a lower frame that can be connected, the steel frame can be easily transported and constructed. Therefore, also from this point, the construction period of the structure can be shortened and the construction cost of the structure can be reduced.

  (3) By configuring the steel frame with an upper frame and a lower frame to which the steel frame can be connected, it is possible to easily insert filling materials such as boulders into the steel frame, and when the steel frames are stacked, The filling materials protruding from the steel frame mesh with each other. Therefore, also from this point, a sabo structure having high strength against debris flow can be constructed.

It is a front view which shows the steel frame for sabo structures of this invention. It is a top view which shows the steel frame for sabo structures of this invention. It is a side view which shows the steel frame for sabo structures of this invention. It is a figure which shows the connection part of the steel frame for sabo structures of this invention, (a) is a front view, (b) is the sectional view on the AA line of (a). (C) is a front view when a gap member is sandwiched. It is a top view which shows the sabo structure constructed | assembled with the steel frame for sabo structures of this invention. It is a side view which shows the sabo structure constructed | assembled with the steel frame for sabo structures of this invention. It is a side view which shows the state which stopped the boulder with the sabo structure of this invention. It is a front view showing the case where steel frame B is wrapped up and down, and (a) is a front view before boulder injection, (b) is a side view before boulder injection, and (c) is a boulder. The front view after throwing in, (d) is the side view after throwing boulders. It is a front view which shows the case where it wraps and assembles steel frames B back and forth, (a) is a front view, (b) is a side view, (c) is a rear view. It is a perspective view which shows the conventional steel frame A. It is a perspective view which shows the frame member which comprises the conventional steel frame A. It is a partially-omission side view which shows the connection structure of the conventional steel frame A. It is a partially omitted side view showing a sabo structure constructed using a conventional steel frame.

  One embodiment of the steel frame for a sabo structure according to the present invention will be described with reference to the drawings.

  1 is a front view showing a steel frame for a sabo structure according to the present invention, FIG. 2 is a plan view showing a steel frame for a sabo structure according to the present invention, and FIG. 3 is a steel for a sabo structure according to the present invention. FIG. 4 is a view showing a connecting portion of the steel frame for a sabo structure according to the present invention, (a) is a front view, and (b) is an A-A view of (a). Line sectional drawing, (c) is a front view when a space member is sandwiched.

  As shown in FIGS. 1 to 3, the steel frame B for sabo structure according to the present invention is composed of an upper frame 1 and a lower frame 2 assembled in a rectangular parallelepiped. The steel frame B is not limited to a rectangular parallelepiped, and may be a three-dimensional shape such as a cube. The upper frame 1 is composed of a horizontal beam 1a made of a steel pipe welded into a rectangle and a vertical beam 1b made of a steel pipe vertically welded below each corner portion of the horizontal beam 1a. The lower frame 2 includes a horizontal beam 2a made of a steel pipe welded into a rectangular shape and a vertical beam 2b made of a steel pipe vertically welded above each corner portion of the horizontal beam 2a. Note that at least one beam (frame material) of the upper frame 1 and the lower frame 2 is not limited to a steel pipe (round shape or square shape), but may be a material of a face material such as L-shaped steel, H-shaped steel, or expanded metal. . As shown in FIGS. 4A and 4B, the vertical beam 1b of the upper frame 1 and the vertical beam 2b of the lower frame 2 are connected by bolts and nuts 3 via flanges 1c and 2c.

  Thus, since the steel frame B is comprised from the upper frame 1 and the lower frame 2, if the upper frame 1 and the lower frame 2 are manufactured in a factory beforehand, the upper frame 1 will be carried out locally. Since only the connecting operation between the frame 2 and the lower frame 2 is sufficient, the assembly of the steel frame B can be performed in a short time with a small number of people. Moreover, since it is divided into two parts, it is not bulky, and the loading efficiency in transportation of trucks and the like is good, so that a large amount can be easily carried to the site.

  Moreover, as shown in FIG.4 (c), since it is a flange connection system, if the space | interval material 13 (spacer) is inserted between the flange 1c and the flange 2c, the unit height of the steel frame B can be adjusted, It can be easily corrected for uneven settlement after construction.

  The size of the steel frame B is, for example, about 1 to 2 m per side, and boulders collected at the construction site of the sabo structure are put into the steel frame B. The boulders can be introduced by connecting the upper frame 1 to the lower frame 2 after the boulders are inserted into the lower frame 2 placed on the construction ground of the sabo structure, or by connecting the upper frame 1 and the lower frame 2 together. After assembling into a rectangular parallelepiped, it may be put into the steel frame B. The method of charging may be such that the boulders are completely contained in the steel frame B, but in particular may protrude from the upper part of the steel frame B (see FIG. 6). When the boulders protrude from the upper part of the steel frame B, when the steel frames B are stacked, the upper and lower boulders can mesh with each other to suppress the sliding and falling of each steel frame B. The stability of the frame B can be improved.

  In order to construct a sabo structure with the steel frame B of the present invention configured as described above, the following is performed. This example is a case where two steel frames B are stacked, but it goes without saying that the number of steel frames B is not limited to two.

  First, the construction ground of the sabo structure is easily leveled to the extent that the steel frame B does not wobble, and the steel frame B is constructed without excavation for laying and without building a concrete foundation or the like. Are placed side by side on the ground. Next, the whole or part of the boulders 4 as the filling material collected locally are put into the lower frame 2. At this time, the size and number of boulders are basically stored in the steel frame B. However, the boulders may be introduced so as to protrude from the upper part of the steel frame B, thereby engaging with the boulders of the steel frames B to be stacked, thereby suppressing the sliding and falling of the upper steel frame B. And the stability of the steel frame B can be improved. Next, the upper frame 1 is connected to the lower frame 2 to assemble the lower steel frame B.

  When the assembly of the lower steel frame B is completed, the upper steel frame B is stacked on the lower steel frame B. Also in this case, the lower frame 2 of the upper steel frame B is placed side by side on the lower steel frame B, and after the boulders are introduced, the upper frame 1 is connected to the lower frame 2 and the upper steel frame B is connected. Assemble.

  In this way, the steel frame B is assembled in two upper and lower stages. As shown in FIGS. 6 and 7, the adjacent steel frames B are loosely connected to each other by, for example, a wire rope 5 as a connecting means. Also good. By loosely connecting the steel frames B, the steel frames B stacked in two stages can be prevented from easily collapsing. Thus, by connecting the steel frames B to each other loosely rather than rigidly, the sabo structure is changed to be composed of an aggregate of individual steel frames that behave apart. There is no. In other words, the initial behavior when the gravel collides with the steel frame B is resisted by the individual steel frames B, but if it still cannot be resisted, finally the connected steel frames B It resists as a whole.

  The steel frames B may be loosely connected by a connecting method using an assembling method of the steel frames B other than the connecting means such as the wire rope 5 (see FIGS. 8 and 9).

  As a method of assembling the steel frame B in two upper and lower stages, as shown in FIGS. 8A to 8D, the upper and lower steel frames B are wrapped, or as shown in FIGS. 9A to 9C. Alternatively, the front and rear steel frames B may be wrapped. Of course, the steel frame B may be wrapped in the left-right direction (lateral direction). According to this assembly method, the wire rope 5 can be omitted. In addition, when assembling the steel frame B by the assembling method shown in FIGS. 9A to 9C, the futon ridges 14 and the like are laid on the lower part of the protruding steel frame B on the upstream side.

  According to the sabo structure constructed according to the present invention, as shown in FIG. 7, boulders flowing down from the upstream side can be surely stopped during a flood or the like. Further, an expanded metal, a welded wire net, a steel pipe, a steel bar or the like is attached to at least the downstream vertical surface of the upper frame 1 or the lower frame 2 of the steel frame B for the sabo structure, so that pebbles or the like do not flow out. good.

  As described above, according to the present invention, the steel frames B constituting the sabo structure into which the filling material such as the local boulders 4 is introduced are not rigidly connected to each other and behave apart. Since each steel frame B functions as a sabo structure, it is not necessary to perform large-scale foundation work. As a result, the construction period of the structure can be shortened and the construction cost of the structure can be reduced, and it has high strength against sediment and debris flow.

  Moreover, since the steel frame B is configured by the upper frame 1 and the lower frame 2 that can be connected to each other, the steel frame B can be easily transported and constructed. Reduction can be achieved.

  Furthermore, by comprising the upper frame 1 and the lower frame 2 to which the steel frame B can be connected, it is possible to easily insert the filling material such as boulders into the steel frame B. When stacked, the filling materials such as boulders 4 protruding from the steel frame B mesh with each other. Therefore, also from this point, it is possible to construct a sabo structure having high strength against sediment and debris flow, and to improve the stability as a structure.

  Since the steel frame B is open on six sides, the pebbles do not stay in the frame but become voids, so the apparent density is very small, so it can also be applied to places with low ground support force. .

A: Conventional steel frame B: Steel frame of the present invention 1: Upper frame 1a: transverse beam 1b: longitudinal beam 1c: flange 2: lower frame 2a: transverse beam 2b: longitudinal beam 2c: flange 3: bolt and nut 4: boulder 5: Wire rope 6: Frame member 6a: Bolt hole 7: Ground 8: Foundation 9: Filling material 10: High strength bolt 11: Joint plate 12: Nut 13: Spacing material 14: Duvet

Claims (9)

  A steel frame for a sabo structure consisting of three-dimensionally assembled steel materials, which consists of an upper frame and a lower frame, the upper frame and the lower frame being connectable, and filled with filling material inside. A steel frame for a sabo structure.   The steel frame for a sabo structure according to claim 1, wherein the upper frame and the lower frame connected to each other form a rectangular parallelepiped.     The steel frame for a sabo structure according to claim 1 or 2, wherein the upper frame and the lower frame are made of steel pipes and are flange-coupled to each other.   The steel frame for a sabo structure according to claim 1 or 2, wherein the upper frame and the lower frame are made of shape steel and are flange-coupled to each other. Using a steel frame for a sabo structure consisting of three-dimensionally assembled steel materials, the steel frame can be used as a foundation on the construction ground of a sabo structure without excavating the ground for rooting. In the construction method of the sabo structure, placing the filling material in the steel frame and stacking it,
The steel frame is constituted by an upper frame and a lower frame that can be connected, and after the whole amount or a part of the filling material is put into the lower frame, the upper frame is connected to the lower frame. To build a sabo structure. Using a steel frame for a sabo structure consisting of three-dimensionally assembled steel materials, the steel frame can be used as a foundation on the construction ground of a sabo structure without excavating the ground for rooting. In the construction method of the sabo structure, placing the filling material in the steel frame and stacking it,
A sabo structure comprising an upper frame and a lower frame to which the steel frame can be connected, and after filling the upper frame and the lower frame, filling material is put into the steel frame. How to build things. The construction method of the sabo structure according to claim 5 or 6 , wherein a shape after the connection between the upper frame and the lower frame is a rectangular parallelepiped . The construction method for a sabo structure according to any one of claims 5 to 7 , wherein the upper frame and the lower frame are made of steel pipes and are flange-coupled to each other . The method for constructing a sabo structure according to any one of claims 5 to 8 , wherein the steel frames are loosely connected to each other by a connecting means or a connecting method.

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