Protective structures and methods for constructing protective structures

Abstract

Implement protective measures more quickly than with conventional methods. [Solution] Protective structures (1,1A,1B,1C) are constructed to face the flow of debris flow. It consists of a trapping body (10) that captures objects in the debris flow, and a part of the lower part of the trapping body (10) that surrounds Furthermore, it includes a base (20) that fixes the position of the capture body (10) by its own weight.

Description

Technical Field

[0004]

[0001] The present invention relates to a protective structure and a method for constructing the protective structure.

Background Art

[0002] In recent years, due to abnormal weather caused by climate change, landslide disasters have frequently occurred throughout the country, and the forms of landslide disasters are "spreading", "intensifying", and "occurring frequently". To eliminate human <000​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​Because it involves placing the support columns inside the concrete (usually embedded within the concrete), construction takes time. Depending on the extent of the landslide, it may not be possible to secure concrete. Furthermore, dams made of concrete blocks use concrete blocks with special shapes. Because they are installed continuously both vertically and horizontally, skill is required to interlock the shapes, and construction takes time. It takes time. Furthermore, measures using large sandbags require the work of filling the sandbags with soil and sand in emergencies, The construction will take time. Also, there is a risk of sandbags being damaged by debris flows and driftwood. Therefore, there is a need for emergency measures that can be implemented more quickly than the methods described above.

[0005] Therefore, the present invention has been made in view of the above problems, and can be implemented more quickly than conventional methods. The objective is to provide technology that enables construction. [Means for solving the problem]

[0006] One aspect of the present invention is a protective structure constructed to face the flow of a debris flow, A trapping body that captures objects in a debris flow, and a part of the lower part of the trapping body that surrounds itself, and its own weight The invention is characterized by comprising a foundation for fixing the position of the capture body.

[0007] Furthermore, the capturing body comprises a vertical portion extending in the vertical direction and a column portion connected to the lower end of the vertical portion. The foundation has a hole into which the column portion can be inserted, and the column portion is the hole in the foundation It is inserted through the vertical section, with its lower end buried in the ground and its upper end connected to the vertical section. preferable.

[0008] Furthermore, the column portion is provided with a stopper to prevent the column portion from coming out of the hole. It is preferable to do so.

[0009] Further, it is preferable that the column portion is formed in a shape complementary to the shape of the hole.

[0010] Further, the capture body includes a vertical portion extending in the standing direction, and is connected to the lower end portion of the vertical portion and includes a connecting portion connected to the foundation, and the foundation has a flat portion on which the connecting portion is placed. This is preferable.

[0011] Further, it is preferable that the foundation has a restricting portion that restricts the movement of the connecting portion placed on the flat portion. This is preferable.

[0012] Further, the capture body includes a vertical portion extending in the standing direction, and is connected to the lower end portion of the vertical portion and includes a placing portion on which the foundation is placed, and the foundation is preferably placed on the placing portion with a part of the vertical portion sandwiched therebetween. This is preferable.

[0013] Further, it is preferable that at least one of the vertical portion and the placing portion and the foundation are connected. This is preferable.

[0014] One aspect of the present invention is a method for constructing the above protective work, including a step of burying a lower end portion of the column portion in the ground at a construction position, a step of inserting the column portion into the hole of the foundation and placing the foundation on the ground, and a step of connecting a lower end portion of the vertical portion to an upper end portion of the column portion. This is characterized by having. This is characterized by having. [[ID=…]] ->

[0016] ​​​​​​​​​​​ One aspect of the present invention is a method for constructing the above-mentioned protective structure, wherein the ground at the construction site is placed as described above A step of placing the part, a step of placing the foundation on the upper surface of the aforementioned part, and the aforementioned part and the It is characterized by having a step of connecting the vertical section. [Effects of the Invention]

[0017] According to one aspect of the present invention, construction can be carried out more quickly than with conventional methods. [Brief explanation of the drawing]

[0018] [Figure 1] This is a view of the protective structure in the first embodiment, seen from the downstream side. [Figure 2] This is a view from the direction of arrow AA in Figure 1. [Figure 3] This is a side view of the protective structure shown in Figure 1. [Figure 4] This figure shows the vertical stopper in Figure 1. [Figure 5] This is a view of the protective structure in the second embodiment, seen from the downstream side. [Figure 6] This is a view from the direction of arrow BB in Figure 5. [Figure 7] This is a side view of the protective structure shown in Figure 5. [Figure 8] This is a view of the protective structure in the third embodiment, seen from the downstream side. [Figure 9] This is a view from the CC arrow in Figure 8. [Figure 10] This is a side view of the protective structure shown in Figure 8. [Figure 11] This is a view of the protective structure in the fourth embodiment, seen from the downstream side. [Figure 12] This is a view along the DD arrow in Figure 11. [Figure 13] This is a side view of the protective structure shown in Figure 11. [Modes for carrying out the invention]

[0019] Preferred embodiments of the present invention will be described with reference to the drawings.

[0020] [First Embodiment] <Structure of protective measures> As shown in Figures 1 to 4, protective work 1 is used, for example, in the recovery of a disaster-stricken area after a landslide. This is an emergency measure constructed urgently to carry out the activity. The locations where protective measures 1 are constructed are limited. Although not specified, for example, protective structure 1 is installed in a disaster-stricken area in a narrow mountainous region. Furthermore, protective structure 1 is installed in a location where a debris flow has occurred once and is expected to occur again. It is constructed to face the flow of debris flows. For the sake of explanation, the expected direction of the debris flow will be denoted as "F," and the upstream side as "F1." The downstream side is designated as "F2". Furthermore, the direction intersecting the debris flow direction F is the width direction of the protective structure 1. Let's call it "W".

[0021] In Figure 1, multiple protective structures 1 are constructed in a line along the width direction W. Protective structures 1 are made of soil It is installed downstream F2 in the disaster area where the debris flow occurred. Protective structure 1 is expected to It is constructed to face the flow of debris flow. Protective structure 1 consists of a capture body 10 and a foundation 20 It is equipped with the following features.

[0022] (Captured object) As shown in Figures 1 to 4, the capture body 10 is connected to the foundation 20 so as to be erected on it. It captures objects such as rocks, boulders, and driftwood contained within debris flows. The trapping body 10 has vertical parts 11 and 13 that extend in the vertical direction relative to the foundation 20, and in the vertical part 11 A horizontal section 15 is spanned between vertical sections 11 on the upstream side F1 in the direction of the debris flow, and each vertical section 11, 1 It comprises a column portion 17 connected to the lower end of 3. The protective structure 1 consists of four vertical sections 11, 13, a connecting section 12, six horizontal sections 15, and four column sections. It is equipped with 17, however the number of vertical parts 11, 13, horizontal parts 15 and column parts 17 is not limited to a specific number. It is not determined.

[0023] The vertical sections 11, 13 and the connecting section 12 are formed, for example, from H-shaped steel. 4 vertical sections 11 and 13 are two upstream vertical sections 11 and two downstream vertical sections 13. Upstream vertical section 11 Each of these is connected to the column section 17 at one end (lower end), and is erected above the foundation 20. The downstream vertical section 13 is connected to the column section 17 at one end (lower end). It is erected on top of the foundation 20. The upstream vertical section 11 extends diagonally toward the downstream F2 as it goes upward from the foundation 20. It is growing. The downstream vertical section 13 extends diagonally toward the upstream F1 as it goes upward from the foundation 20. The upstream vertical section 11 and the downstream vertical section 13 are each, and as they move upward, they move toward each other. Approaching. The downstream vertical section 13 is near the upper end of the upstream vertical section 11 at its upper end (other end). It is connected to the upstream vertical section 11 and the downstream vertical section 13, near their lower ends, It is connected by 12. The capture body 10 is located on the upstream vertical side when the protective structure 1 is viewed from the side. The 11 and the downstream vertical section 13 are assembled in a roughly λ shape.

[0024] The horizontal section 15 has a holder 40 attached to the flange 11a facing the upstream side F1 in the upstream vertical section 11. It is attached by [unclear]. The horizontal section 15 is formed from a steel pipe that has a circular cross-section. The horizontal section 15 is located along the extension direction of the upstream vertical section 11, adjacent to the upstream vertical section 11 at predetermined intervals. It spans between sections 11. The horizontal sections 15 are such that their extension directions are approximately parallel to each other. The horizontal portion 15 extends from the upstream vertical portion 11 at both ends in the direction of extension. The horizontal section 15 may be, for example, a square steel pipe with a rectangular cross-section, an elliptical steel pipe with an elliptical cross-section, or an H-shaped section. Other materials besides steel pipes with a circular cross-section may be used, such as steel pipes.

[0025] The retainer 40 is located on the flange 11a of the upstream vertical portion 11 facing the upstream side F1. Fasteners (for example, bolts and nuts) are attached at predetermined intervals along the extending direction of part 11. It is attached in a way that allows it to be easily attached and detached. As shown in Figure 3, the holder 40 is formed of, for example, steel. It has a bottom plate 41 and a retaining plate 42. The bottom plate 41 is the flange 11a of the upstream vertical portion 11. It is fixed in place. The bottom plate 41 is formed so as not to protrude from the flange 11a, and it fastens. It is fixed to the upstream vertical section 11 by fasteners. The retaining plate 42 is erected on the bottom plate 41 facing the upstream side F1 and holds the lateral portion 15. The retaining plate 42 is a steel plate joined to the surface of the bottom plate 41 by welding or the like. A circular hole 43 is formed through which the horizontal portion 15 is inserted. Furthermore, by welding the horizontal portion 15 to the retaining plate 42 at the position of hole 43, the horizontal portion 15 becomes the upstream vertical portion It is held in 11. Furthermore, the fixing of the lateral portion 15 to the holder 40 is not limited to fixing by welding, for example, Bolts or similar fasteners may be used.

[0026] The column section 17 is formed, for example, from an H-shaped steel. The upper end of the column section 17 is upstream The lower ends of the side vertical section 11 and the downstream vertical section 13 are individually connected via connecting plates 18. The column section 17 has a flange 17a which is the flange 11a of the upstream vertical section 11 and the downstream vertical section 13 It is connected to the flange 13a. The connecting plate 18 is connected to the upstream vertical section 11. It is provided so as to abut the front and back surfaces of the flange 17a of the lunge 11a and the column portion 17, respectively. It is connected to the upstream vertical section 11 and column section 17 by fasteners with bolts and nuts. The plate 18 is located on both sides of the flange 13a of the downstream vertical section 13 and the flange 17a of the column section 17. They are provided to abut against each other, and fastened with bolts and nuts, the downstream vertical section 13 and the column section 17 It is connected to. The column section 17 is inserted through the hole 21 in the foundation 20, and a predetermined length of its lower end is buried in the ground. The column section 17 is embedded in the ground so that its extension direction is perpendicular to the ground G. Yes, they are. As shown in Figure 4, the flange 17a of the column portion 17 is accessible from the hole 21 in the foundation 20. A stopper 19 is attached to restrict upward movement. The stopper 19 is visible in plan view. It is a rectangular plate material, formed to be approximately the same width as the flange 17a of the column section 17. P19 extends in a direction perpendicular to the plane direction of the flange 17a of the column portion 17 It is attached to flange 17a of 17. The stopper 19 is inserted through the hole 21 of column portion 17. When this is done, it is formed to a length that protrudes outward from the hole 21 in the foundation 20. The stopper 19 is positioned at ground level G when the column portion 17 is buried in the ground. In other words, the stopper 19 also serves as a guide for the depth to which the column section 17 is buried.

[0027] (Basic) The foundation 20 is placed on the ground G at the construction site, for example, a concrete block The base 20 surrounds a portion of the lower part of the capture body 10, and due to its own weight, the capture body The position of 10 is fixed. Specifically, the foundation 20 is provided in the same number as the number of column sections 17. They are provided so as to surround the column section 17. That is, there are four for each capture body 10. A foundation 20 is provided. The foundations 20 are arranged in close proximity so that their end faces face each other. Each foundation 20 may be connected to one another. Each of the foundations 20 is large enough to be loaded onto the bed of a truck (preferably a 4-ton truck). It is formed to the size (width, depth, height) and can be easily installed with relatively small heavy machinery when in use. It can be installed at construction sites, and before a disaster occurs, it can be stored in a warehouse without taking up a large amount of space. It can be stored in a container.

[0028] The foundation 20 has a hole 21, a flat portion 22, and a protruding portion 23. The hole 21 is formed in a circular shape so that the column portion 17 can be freely inserted. The hole 21 is the foundation From the front to the back of 20, in other words, in the state where the foundation 20 is placed on the ground G The hole 21 is formed to penetrate through in the vertical direction. While this is possible, the stopper 19 is formed to be too small to be inserted. The flat portion 22 is formed at least on the upper surface when the foundation 20 is placed on the ground G. In this embodiment, the flat portion 22 is formed on the upper and lower surfaces of the foundation 20. The flat portions 22 are arranged in a vertical direction. The flat portions 22 have a horizontal surface. It is formed to align with the direction. The hole 21 is formed approximately in the center of the flat portion 22. The flat portion 22 may be formed on a part other than the upper surface of the foundation 20. The protruding portion 23 is formed at least on the upper surface when the foundation 20 is placed on the ground G. The protruding portion 23 is the part of the upper surface of the base 20 other than the flat portion 22, and when viewed from the side, it is a It is formed in a specific shape. The protrusion 23 is at least larger than the diameter of the hole 21, and the capturing body 10 It is formed with a larger gap than the width of the vertical parts 11, 13 and column parts 17 that make up this structure. In this embodiment, the protrusions 23 are formed on the upper and lower surfaces of the base 20, and are relative to each other. The protrusions 23 are formed in a vertical direction. Also, the protrusions 23 formed on the lower surface are It is acceptable if part of it is buried underground. Furthermore, the foundation 20 is any concrete block through which the column section 17 can be inserted. It may simply be a rectangular concrete block with holes, flat sections and protrusions formed on it. It may also be a material that has holes, flat sections, and protrusions pre-formed, such as a wave-dissipating block.

[0029] <Methods for constructing protective structures> Next, we will explain how to construct protective barrier 1. When constructing protective structure 1, concrete blocks will be brought from a storage warehouse located near the disaster site. The foundation 20 of the building will be removed using heavy machinery and trucks and transported to the disaster site. In parallel with this transportation work, or prior to it, the disaster-stricken area will be leveled using heavy machinery. The lower end of the column section 17 is buried vertically in the ground at the construction site (Step S1 ). At this time, for example, the lower end of the column portion 17 is moved underground until the stopper 19 is in contact with the ground G. It will be buried. Next, the upper end of the column section 17 is inserted through the hole 21 in the foundation 20, and the foundation 20 is placed on the ground G. (Step S2). At this time, a part of the protruding portion 23 on the lower side of the foundation 20 will be buried in the ground. You can do that. Next, the lower ends of the vertical sections 11 and 13 are connected to the upper end of the column section 17 (step S3). In this case, the connecting plate 18 is connected to the flange 17a of the column portion 17 and the flange 11a of the vertical portions 11 and 13. It is brought into contact with 13a and connected with bolts and nuts. At this time, the horizontal part 15 is placed above It is connected to the flow-side vertical section 11, and the upstream vertical section 11 and the downstream vertical section 13 are also connected in advance. It would be good to do so. Of course, after the column section 17 and the vertical sections 11, 13 are connected, the vertical sections 11, 13 and the horizontal section 1 The 5 may be connected to connect the upstream vertical section 11 and the downstream vertical section 13. Based on the above, protective structure 1 is constructed. In the construction method of the protective structure 1 described above, the capture body 10 was manufactured in advance at the factory. Similar to foundation 20, protective work 1 may be stockpiled at the construction site.

[0030] According to the protective structure 1 constructed as described above, the capture body 10 and the foundation 20 are in a factory, etc. Because it can be manufactured and stored near areas prone to mudslides, when a landslide occurs... Therefore, protective measures 1 can be quickly constructed as an emergency countermeasure. This aims to prevent secondary disasters caused by subsequent soil and driftwood runoff, and to expedite the securing of safety for surrounding homes and the construction site. It is possible. Furthermore, since all components of the protective structure 1 can be stockpiled, the preparation period during construction can be significantly shortened. Cut. Also, since concrete blocks are used as the foundation 20, concrete will be used at the construction site. The process of pouring concrete and curing it is unnecessary, and after the foundation 20 is placed, the retaining body 10 is immediately placed on the base It can be attached to foundation 20. Furthermore, the vertical sections 11 and 13 and the column section 17 can be easily separated simply by removing the connecting plate 18. This makes removal easier and facilitates repurposing the space in other locations. Furthermore, by providing a foundation 20 at each column 17, the size of the concrete block can be reduced. This allows for the production of goods on-site or in factories, which can then be transported to storage locations using small trucks. It will become like that. Furthermore, since a predetermined length of the lower end of each column 17 is buried in the ground, the column 17 is a foundation The protective structure 1 can be made more resistant to debris flows than when it is connected to 20. Furthermore, since a stopper 19 is provided on the column section 17, the retaining body 10 will not be pulled out from the foundation 20. This prevents the trapping body 10 from being attached to the foundation 20, and effectively fixes it to the foundation 20 without requiring a physical connection. It is possible.

[0031] Furthermore, since the pre-fabricated units are simply installed in the areas that need attention, leveling the ground is also easy. Simple excavation using heavy machinery is sufficient, and construction precision does not need to be too strict, and some ground conditions are acceptable. It can handle uneven terrain. Furthermore, the trapping portion of the trapping body 10 that traps debris flows and driftwood is formed from a horizontal steel pipe. The holder 40 that holds section 15 is bolted to the upstream vertical section 11 formed from an H-shaped steel beam. It is constructed by the following. Here, the capture body 10 captures the energy of debris flow and driftwood in the steel of the capture section. Because the pipe absorbs the force through its indentation and bending, and the downstream vertical section 13 supports the reaction force, the entire protective structure 1 Since it does not involve significant deformation, only the damaged lateral section 15 can be easily removed after capturing debris flows and driftwood. It can be replaced. Furthermore, when removing captured debris flows and driftwood after capturing them, the upper part of the horizontal section 15 can be used to capture them. By sequentially removing the horizontal parts 15 of the gripping section, the stone removal and tree removal work can be carried out smoothly. This can be done. Note that when removing the side section 15, you can start from any of the side sections 15 in the height direction. That's good too. Furthermore, the protective structure 1 is formed by diagonally connecting the downstream vertical section 13 to the upstream vertical section 11, creating a roughly λ shape. It is constructed in such a way that its shape can be optimized according to the load of debris flow expected at the site. In other words, by configuring the protective structure 1 in a roughly λ shape, the horizontal load of the debris flow is absorbed by the upstream vertical section 11 It can be decomposed into components parallel to and perpendicular to the given plane.

[0032] [Second Embodiment] <Structure of protective measures> Next, a second embodiment of the protective structure will be described. Protective structure in the second embodiment The differences between 1A and the protective structure 1 in the first embodiment are the configuration of the column section and the connection between the column section and the vertical section. Since it is a connected structure, only the differences will be explained below, and the same components as in the first embodiment will be referred to by the same symbols. The number is added, and the explanation is omitted. As shown in Figures 5 to 7, the column portion 31 is formed in a shape complementary to the shape of the hole 21 in the foundation 20. Specifically, the column section 31 is formed from, for example, a cylindrical steel pipe. The outer diameter of 31 is formed to be slightly smaller than the diameter of the hole 21 in the foundation 20, and hole 2 When the column portion 31 is inserted through 1, a small gap is created between the column portion 31 and the wall surface of the hole 21. It is in degrees. A cylindrical connecting member 32 is fitted into the upper end of the column portion 31, and the connecting member 32 is inserted from the side. They are connected by bolts and nuts. The upper end of the connecting member 32 is closed. The lower ends of the vertical portions 11 and 13 are in contact with the upper end surface of the connecting member 32. ,13 may be joined by welding, or a belt attached to the lower end of the vertical parts 11,13 The connecting member 32 may be connected to the connecting plate with bolts and nuts. The column portion 31 is inserted through the hole 21 in the foundation 20, and a predetermined length of its lower end is buried in the ground. It is.

[0033] <Methods for constructing protective structures> Next, we will explain how to construct protective barrier 1A. When constructing protective barrier 1A, concrete blocks will be brought from a storage warehouse located near the disaster site. The foundation 20 of the building will be removed using heavy machinery and trucks and transported to the disaster site. In parallel with this transportation work, or prior to it, the disaster-stricken area will be leveled using heavy machinery. The lower end of the column section 31 is buried vertically in the ground at the construction site (Step S1 ). Next, the upper end of the column section 31 is inserted through the hole 21 in the foundation 20, and the foundation 20 is placed on the ground G. (Step S2). At this time, a part of the protruding portion 23 on the lower side of the foundation 20 will be buried in the ground. You can do that. Next, the connecting member 32 is connected to the upper end of the column portion 31 (step S3). When connecting, the connecting member 32 is fitted onto the upper end of the column portion 31, and the connecting member 32 The column section 31 and the connecting member 32 are connected from the side using bolts and nuts. Next, the lower ends of the vertical sections 11 and 13 are connected to the connecting member 32 (step S4). In this case, the joints may be made by welding, or a base plate attached to the lower end of the vertical sections 11 and 13 may be used. The connecting member 32 may be connected via a plate using bolts and nuts. At this time, the horizontal section 15 is connected to the upstream vertical section 11 in advance, and the upstream vertical section 11 and the lower It is also preferable that the vertical section 13 on the flow side is connected in advance. Of course, the column section 17 and the vertical sections 11, 13 After connection, the vertical sections 11 and 13 are connected to the horizontal section 15, and the upstream vertical section 11 is connected to the downstream vertical section 13. You may do so. Based on the above, protective structure 1A is constructed. In the construction method of the protective structure 1A described above, the capture body 10 was manufactured in advance at the factory. Similar to foundation 20, protective work 1A may be stockpiled at the construction site. Furthermore, in this embodiment, the order of steps S1 and S2 is reversed, that is, First, the foundation 20 is placed on the ground G, and then the column section 31 is inserted through the hole 21 of the foundation 20. The lower end may be buried in the ground. Furthermore, the column portion 31 is provided with a stopper 19 on its outer circumference, similar to the first embodiment. Measures may be taken to prevent it from falling out.

[0034] According to the protective structure 1A constructed as described above, the protective structure 1 in the first embodiment is the same as the protective structure 1 in the first embodiment. In addition to producing various effects, the gap between the foundation 20 and the column section 31 is small, so the capture body 10 The tapping can be reduced. Furthermore, the column portion 31 is formed in a shape complementary to the shape of the hole 21, so that it can be inserted into the hole 21. The column section 31 can be made as large as possible, thereby increasing the strength and stability of the capture body 10. It is possible. Furthermore, since a predetermined length of the lower end of each column 31 is buried in the ground, the column 31 is a foundation The protective structure 1A can have a higher resistance to debris flows than when it is connected to 20.

[0035] [Third Embodiment] <Structure of protective measures> Next, a third embodiment of the protective structure will be described. Protective structure in the third embodiment The difference between 1B and the protective structure 1 in the first embodiment is that the vertical section is not a column section, but a connection to the foundation. Since it is a point connected to the joint, only the differences will be explained below, and the configuration is the same as in the first embodiment. The same symbol is used to indicate that the explanation is omitted. As shown in Figures 8 to 10, the protective structure 1B does not have a column section. The protective structure 1B is a foundation It is equipped with a connecting portion 51 provided on the flat portion 22 of the upper surface of 20. The connecting portion 51 is, for example, It is formed from an H-shaped steel beam, and the flanges are arranged in the vertical direction on the flat portion 22. The width of the flat portion 22 of the foundation 20 is formed to be at least greater than the width of the flange of the H-shaped steel. In the foundation 20, protruding portions 23 are formed on both sides of the connecting portion 51 provided on the flat portion 22. The protruding portion 23 restricts the movement of the connecting portion 51 which is placed on the flat portion 22. It functions as a part. The connecting part 51 is fixed to the flat part 22 of the foundation 20, for example, via an anchor. It is established. The lower ends of the vertical sections 11 and 13 are connected to the flange 51a located above the connecting section 51. Specifically, as shown in Figures 9 and 10, the vertical sections 11 and 13 are located on the base plate 52. A base plate 52 has a rectangular surface in plan view, and the width of the connecting portion 51 is They are formed to have almost the same width. The base plate 52 is formed in the vertical parts 11, 13 They are attached by welding to one end (the lower end) of each. Holes are formed near each corner of the base plate 52, and bolts 53 are inserted into these holes. By fastening the base plate 52 through and from the connecting portion 51 side with a nut 54, the base plate 52 is connected to the connecting portion It will be connected to 51.

[0036] <Methods for constructing protective structures> Next, we will explain how to construct protective structure 1B. When constructing protective structure 1B, concrete blocks will be brought from a storage warehouse located near the disaster site. The foundation 20 of the building will be removed using heavy machinery and trucks and transported to the disaster site. In parallel with this transportation work, or prior to it, the disaster-stricken area will be leveled using heavy machinery. The foundation 20 is placed on the ground G at the construction site (step S1). At this time, the foundation 20 A portion of the protruding part 23 on the lower side may be buried in the ground. Next, the connecting part 51 is placed on the upper flat part 22 of the foundation 20, and the connecting part is secured with anchors or the like. Connect and secure 51 to the foundation 20 (step S2). Next, the lower ends of the vertical sections 11 and 13 are connected to the upper flange 51a of the connecting section 51 (ste (S3). When connecting, the base plate 5 is provided at the lower end of the vertical sections 11 and 13. The part 2 is brought into contact with the flange 51a of the connecting part 51 and connected with bolts 53 and nuts 54. At this time, the horizontal section 15 is connected to the upstream vertical section 11 in advance, and the upstream vertical section 11 and the downstream It is also preferable that the side vertical section 13 is connected in advance. Of course, the connection between the connecting section 51 and the vertical sections 11 and 13 After connection, the vertical sections 11 and 13 are connected to the horizontal section 15, and the upstream vertical section 11 is connected to the downstream vertical section 13. You may do so. Based on the above, protective structure 1B is constructed. In the construction method of the protective structure 1B described above, the capture body 10 was manufactured in advance at the factory. Similar to foundation 20, protective work 1B may be stockpiled at the construction site.

[0037] According to the protective structure 1B constructed as described above, the protective structure 1 in the first embodiment is the same as the protective structure 1 in the first embodiment. In addition to producing various effects, the connecting part 51 is connected to the foundation 20 instead of the process of burying the column part in the ground. Since it only needs to be fixed to the flat section 22, the process of inserting the column section into the hole 21 of the foundation 20 is omitted. This eliminates the need for certain steps, making construction easier. Furthermore, since there is no need to form holes 21 in the foundation 20, the structure of the foundation 20 can be simplified. It is possible. Furthermore, the placement process of the foundation 20 does not depend on the buried position of the column, therefore the position of the foundation 20 This makes the alignment process easier.

[0038] [Fourth Embodiment] <Structure of protective measures> Next, a fourth embodiment of the protective structure will be described. Protective structure in the fourth embodiment The difference between 1C and the protective structure 1 in the first embodiment is that a mounting section is provided instead of a column section. Therefore, only the differences will be explained below, and the same reference numerals will be used for components identical to those in the first embodiment. Therefore, the explanation will be omitted. As shown in Figures 11 to 13, the protective structure 1C does not have a column section. The protective structure 1C is mounted It is equipped with a mounting portion 61. The mounting portion 61 is formed, for example, from a rectangular steel plate in plan view. , connected to the lower ends of the vertical sections 11, 13. The mounting section 61 is connected to each of the vertical sections 11, 13. There are four provided for each capture body 10. The mounting section 61 is connected A portion of the foundation 20 adjacent to the vertical sections 11 and 13 is formed to a size on which it can be placed. In other words, the base 20 sandwiches a portion of each vertical section 11, 13 from the width direction of the capture body 10. In this state, it is placed on the mounting section 61, and the weight of the foundation 20 presses the mounting section 61 down to the ground G. It can be attached. Foundations 20 other than the foundation 20 provided at the widthwise end of the capture body 10 The mounting portion 61 spans across two mounting portions 61 adjacent to each other in the width direction of the capture body 10. It is placed on. The base 20 is connected to the mounting section 61 using a connector. The base 20 is not limited to being connected to the mounting section 61, but is also connected to the vertical sections 11 and 13. Alternatively, it is also acceptable to simply place it on the mounting section 61. If only that is the case, the foundation 20 is not limited to concrete blocks, but can be heavy objects such as sandbags. That's fine. Near the center in the width direction of the capture body 10 on the upper surface of the mounting section 61, the lower ends of the vertical sections 11 and 13 are They are connected. Specifically, the vertical sections 11 and 13 are provided with a base plate 62. The base plate 62 is formed to have a rectangular surface in plan view. The 62 is attached by welding to one end (lower end) of each of the vertical sections 11 and 13. . Holes are formed near each corner of the base plate 62, and bolts 63 are inserted into these holes. By fastening the base plate 62 through and from the lower side of the mounting portion 61 with nuts 64, the base plate 62 It is connected to the mounting section 61.

[0039] <Methods for constructing protective structures> Next, we will explain how to construct protective barrier 1C. When constructing protective structure 1C, the steel plate mounting section 61 is taken from a storage warehouse near the disaster site. The concrete block foundations 20 were then transported by heavy machinery and trucks to the disaster site. To transport. In parallel with this transportation work, or prior to it, the disaster-stricken area will be leveled using heavy machinery. The mounting part 61 is placed on the ground G at the construction site (step S1). Next, the base 20 is placed on the upper surface of the mounting section 61, and the mounting section 61 and the base 20 are connected with a connecting device (for example) Connect them using shackles, etc. (Step S2). Next, the lower ends of the vertical sections 11 and 13 are connected to the upper surface of the mounting section 61 (step S3). In this process, the base plate 62 provided at the lower end of the vertical sections 11 and 13 is placed on the mounting section 61. It is brought into contact with the upper surface and connected with bolts 63 and nuts 64. At this time, the lateral part 15 is pre It is connected to the upstream vertical section 11, and the upstream vertical section 11 and the downstream vertical section 13 are also connected in advance. It would be good if it were. Of course, after the connection between the connecting part 51 and the vertical parts 11, 13, the vertical parts 11, 13 and The horizontal sections 15 may be connected, and the upstream vertical section 11 and the downstream vertical section 13 may be connected. Based on the above, protective structure 1C is constructed. In the construction method of the protective structure 1C described above, the capture body 10 was manufactured in advance at the factory. Similar to foundation 20, protective work 1C may be stockpiled at the construction site.

[0040] According to the protective structure 1C constructed as described above, the protective structure 1 in the first embodiment is the same as the protective structure 1 in the first embodiment. In addition to achieving various effects, the process of burying the column section in the ground is replaced by placing the foundation 20 on the mounting section 61. Since it only needs to be placed on top, the process of inserting the column into the hole 21 of the foundation 20 can be omitted. This makes construction easier. Furthermore, since there is no need to form holes 21 in the foundation 20, the structure of the foundation 20 can be simplified. It is possible. Furthermore, during the process of placing the foundation 20, it is sufficient that the foundation 20 is placed on the placement section 61. This makes the alignment process for the foundation 20 easier.

[0041] <Other> Although preferred embodiments of the present invention have been described, the present invention is not limited to the embodiments described above. This does not define the present invention, and includes all aspects that fall within the concept and claims of the present invention. Furthermore, each configuration is selected as appropriate to achieve at least some of the above-mentioned challenges and effects. They may be combined. For example, the shape, material, and arrangement of each component in the above embodiment, The size and other specifications may be modified as appropriate depending on the specific use of the present invention.

[0042] For example, the trapping body in protective structures is not limited to the above configuration, but can be assembled in a grid pattern with vertical and horizontal sections. The upstream and downstream units may be connected by a connecting member to form a capture body. Furthermore, the foundation is not limited to the above configuration; the position, size, and number of holes, flat sections, and protrusions can be freely chosen. It can be changed. Furthermore, the vertical section of the capture body is fixed to the column section, connecting member, and mounting section using bolts and nuts. It may be a configuration where the parts are joined by welding, or it may be a configuration where the parts are joined by welding. [Explanation of symbols]

[0043] 1,1A,1B,1C Protective work 10 Captured bodies 11,13 Vertical section 15 Side view 17,31 Pillar part 19 Stopper 20 Basics 21 holes 22 Flat area 23 Projection part (regulating part) 32 Connecting member 51 Connecting part 61 Mounting section G ground

Claims

1. A protective structure constructed to oppose the flow of a debris flow, A trapping body for capturing objects in the debris flow, It surrounds a portion of the lower part of the capture body and fixes the position of the capture body by its own weight. The foundation, A protective structure characterized by being equipped with [the following features].

2. The capturing body comprises a vertical portion extending in the vertical direction and a column portion connected to the lower end of the vertical portion. picture, The aforementioned foundation has a hole into which the column portion can be inserted, The column portion is inserted through the hole in the foundation, with its lower end buried in the ground and its upper end The protective work according to claim 1, characterized in that it is connected to the aforementioned vertical portion.

3. The column portion is provided with a stopper that restricts the column portion from coming out of the hole. The protective work according to claim 2, characterized by the above.

4. The column portion is formed in a shape complementary to the shape of the hole, as described in 2. Or the protective measures described in 3.

5. The capturing body has a vertical portion extending in the vertical direction and a base connected to the lower end of the vertical portion. Equipped with a connecting part that connects to the foundation, The foundation is characterized in that it has a flat portion on which the connecting portion is placed, as described in claim 1. Protective work.

6. The foundation has a restricting portion that restricts the movement of the connecting portion placed on the flat portion. The protective work according to claim 5, characterized by the above.

7. The aforementioned capture body has a vertical portion extending in the vertical direction and a base connected to the lower end of the vertical portion. It comprises a mounting section for placing, The aforementioned foundation is placed on the aforementioned mounting section with a portion of the vertical section sandwiched between them. The protective work described in claim 1, characterized by its features.

8. The vertical portion and the mounting portion described above are connected to the foundation. The protective work according to claim 7.

9. A method for constructing a protective structure as described in claim 2, The process involves burying the lower end of the column section in the ground at the construction site, The steps include inserting the column portion through the hole in the foundation and placing the foundation on the ground, The process of connecting the lower end of the vertical section to the upper end of the column section, A method for constructing a protective structure characterized by having the following features.

10. A method for constructing a protective structure according to claim 5, The process of placing the foundation on the ground at the construction site, The steps include connecting the connecting portion to the flat portion of the foundation, The process of connecting the lower end of the vertical portion to the connecting portion, A method for constructing a protective structure characterized by having the following features.

11. A method for constructing a protective structure according to claim 7, The process involves placing the aforementioned mounting unit on the ground at the construction site, The steps include: placing the foundation on the upper surface of the mounting portion; A step of connecting the mounting portion and the vertical portion, A method for constructing a protective structure characterized by having the following features.

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