JPWO2016059657A1 - Prop structure - Google Patents

Abstract

[Summary] [Problem] To provide a strut structure capable of constructing a strut structure with significantly shortened construction cost and construction period and easily replacing the strut body in a short time. [MEANS FOR SOLVING PROBLEMS] A column main body 10, a base block 20 that is detachably integrated with a lower portion of the column main body 10, and a plurality of anchors 40a and 40b that are connected to the base block 20 by obtaining a reaction force from the ground. The base block 20 includes a box 21, a consolidation member 25, and a plurality of reinforcing guide tubes 30. The reinforcing guide tube 30 is filled with a solidifying filler 41 and is integrally reinforced with the base block 20. Form a support pile.

Description

  The present invention relates to a support structure suitable for a protective fence on which an impact such as avalanche, fallen earth and sand, rockfall, etc. acts.

The foundation of the support pillar that constitutes the protective fence is required to have a strength sufficient to withstand an impact load.
In general, a gravity-type concrete foundation is constructed on a slope, and a lower portion of a support is buried in the concrete foundation (Patent Document 1).
As a method for economically setting up a support in a short period of time, a method of directly installing a support in a vertical hole drilled on a slope of a mountainside is known (Patent Documents 2 and 3).
There is also a known strut structure in which the pile body is built in advance without building the pillar in the ground, and the lower part of the pillar placed on the pile head and the pile head is connected by bolts. (Patent Document 4)

JP 2004-19369 A JP 2002-115213 A JP 2008-31740 A JP 2008-101467 A

The conventional support structure has the following problems.
<1> In the form in which the column is erected on the concrete foundation represented by Patent Document 1, it is easy to ensure the stability of the column, but there is a problem that the construction cost increases and the construction period is long.
<2> In the form in which the pillars are directly built in the ground as disclosed in Patent Documents 2 and 3, the depth of the pillars is approximately several times the height of the pillars on the ground surface in order to ensure the strength of the pillars. The length of is needed.
Therefore, not only the hole for erection has to be deeply drilled, but also the total length of the column becomes longer in proportion to the penetration depth, and the column cost increases.
<3> Furthermore, in order to perform drilling of holes for installation and struts, large heavy machinery such as drilling machines and cranes must be introduced, and these large heavy machinery are installed. It is necessary to construct a work platform that can be used, and the construction is large and the construction cost is high.
<4> In the form in which the column is connected to the head of the pile body as disclosed in Patent Document 4, the column cost can be reduced, but a huge stress acts on the connection part.
Even if many high-strength bolts are used, the connection strength between the pile body and the support is limited, so it is limited to small-scale guards and difficult to apply to large-scale guards.
<5> Conventional protective fences were not structured to replace the post that was deformed after the impact.
Therefore, if the support is deformed, regardless of the support form of the support, the entire support is removed from the support structure and rebuilt with a new support, and the work time and work cost required for replacement of the support are very high. Have

The present invention has been made in view of the above-mentioned problems, and the object of the present invention is to economically construct a strut structure while ensuring a high supporting force, and can significantly reduce the construction cost and the construction period. The object is to provide a strut structure.
Furthermore, this invention is providing the support | pillar structure which can replace | exchange the deformed support | pillar main body easily in a short time.

The present invention relates to a strut structure including a strut body, a base block that is grounded to the ground and is detachably integrated with a lower portion of the strut body, and a plurality of anchors that are connected to the base block by obtaining reaction force from the ground. A box in which the base block is partitioned by a plurality of reinforcing plates, a consolidated material filled in the box, and extending downward from the bottom surface of the box, through which the anchor is inserted. A plurality of reinforcing guide pipes that are inserted into the central portion of the box, and a lower insertion portion of the column main body is inserted into the base block so that the column main body can be removed and solidified in the reinforcement guide tube. A reinforcing support pile that is integral with the base block is formed by filling the filler and the box is filled with the consolidation material, and the base ends of the anchors and the reinforcing guide tube are connected to the base block so as not to be separated. It is characterized by that.
In another embodiment of the present invention, the plurality of reinforcing guide tubes and the plurality of anchors may be arranged radially with respect to the box.
In another embodiment of the present invention, a plurality of peripheral compartments are formed around the central compartment of the box, and the base ends of the anchors are connected to each other in a separable manner by a solidified material filled in some peripheral compartments. To do.
In another embodiment of the present invention, the support structure is a support fence support.

The present invention has the following effects.
<1> The support body is erected on a highly rigid base block without being embedded in the ground, and the base block is supported on the ground via a plurality of anchors and reinforcing guide tubes.
Therefore, the support structure can be economically constructed without requiring a large heavy machine or a large work gantry for fixing the base block, and the construction cost and the construction period can be greatly reduced.
<2> The support body and the base block constituting the support structure can be separated.
When the column main body is deformed, it is not necessary to replace the entire column structure, and only the minimum necessary column main body can be replaced. Therefore, it is possible to economically replace the column main body in a short time. it can.
<3> By embedding a reinforcing material in the consolidated material, the strength and rigidity of the base block become very high. Therefore, the thickness of the base block can be reduced to reduce the weight.

The disassembled perspective view of the support | pillar structure which concerns on this invention Longitudinal sectional view of the column structure standing on the slope Cross-sectional view of a column structure standing on a slope It is explanatory drawing of the construction method of a pillar structure, and is explanatory drawing from the process of fixing a box to the process of building a pillar in a box Plan view of the box in FIG. Explanatory drawing of the other form which penetrated the insertion part of the prop body into the ground

An embodiment of the present invention will be described with reference to FIGS.
In addition, although this invention demonstrates the support | pillar structure for protection fences, such as an avalanche, landslide, fallen rocks, etc., a support | pillar structure is applicable to various uses other than a protection fence.

<1> Outline of the column structure When described with reference to FIGS. 1 and 2, the column structure is composed of a plurality of column main bodies 10 erected on the ground G such as slopes at intervals, and the ground 10. The base block 20 is detachably integrated with the lower part of the column main body 10 and a plurality of anchors 40a and 40b for fixing the base block 20 by obtaining a reaction force from the ground.

<2> Column main body The column main body 10 is a structural element having a large bending strength, and is made of, for example, a known steel pipe, shape steel, concrete column or the like.
Other parts excluding the lower part of the column main body 10 correspond to the support structure of the protection net so that the upper and lower sides of various known protection nets can be supported horizontally or the upper side of the protection net can be suspended. It has a structural element.
An annular flange 12 projects from the lower portion of the column main body 10 via a reinforcing vertical rib 11 at a position separated from the lower end of the column body 10, and the base block 20 can be inserted into a portion below the flange 12. Part 13 is formed.

<3> Base Block A base block 20 that supports the column main body 10 while obtaining reaction force in the ground with a plurality of anchors 40a and 40b is a bottomed structure or a cylindrical structure box 21 that opens up and down, and a box body 21. A plurality of reinforcing guide tubes 30 installed through the bottom surface or side surface, a plurality of fixing bolts 26 for fixing the flange 22 of the column main body 10, and a composite material 25 that is filled in the box 21. It is a block body of the structure.

<3.1> Box The box 21 has a plurality of reinforcing plates 22 arranged in an intersecting manner, and the inner space is divided into a plurality of compartments 23 (a central compartment 23a and a peripheral compartment 23b). This is a rigid structure.
In this example, the planar shape of the box 21 and each compartment 23 is shown as a quadrangle, but may be other polygons, circles, or ellipses.

<3.1.1> Reinforcing Plate The reinforcing plate 22 is a plate material for dividing the inner space of the box 21 into a plurality of pieces.
The height of the reinforcing plate 22 only needs to be lower than the height of the box 21. In short, the ends of the plurality of reinforcing plates 22 arranged in a lattice shape in the vertical and horizontal directions may be fixed to the side surface of the box 21. .

<3.1.2> Compartment Chamber A central compartment 23a is formed in the center of the box 21 with a reinforcing plate 22 around the periphery, and the side surface of the box 21 and the reinforcing plate 22 are formed around the central compartment 23a. A plurality of peripheral compartments 23b partitioned by are formed.
The central compartment 23 a of the box 21 can be fitted with a fitting insertion portion 23 at the bottom of the column main body 10.
The peripheral compartments 23b need not all have the same shape and the same volume, and the number of them can be selected as appropriate.
The peripheral compartment 23b has a dimensional relationship in which the reinforcing plate 22 does not interfere with the reinforcing guide tube 30 and the anchors 40a and 40b when the reinforcing guide tube 30 and the plurality of anchors 40a and 40b are inserted and installed from an oblique direction. Yes.

<3.2> Reinforcing Guide Tube The reinforcing guide tube 30 serves to protect the hole wall of the surface layer portion, the guide function when inserting and setting the plurality of anchors 40a and 40b, and the support ground of the base block 20 And the function as a support pile that increases shear and bending resistance.

<3.2.1> Arrangement Direction of Reinforcement Guide Tube The arrangement direction of the reinforcement guide tube 30 with respect to the box 21 will be described with reference to FIG.
The direction in which the reinforcing guide tube 30 is arranged is not perpendicular to the bottom surface of the box 21 but is inclined so that the plurality of anchors 40a, 40b can be radially guided into the ground.

<3.2.2> Reinforcing Guide Tube Positioning Means An example of means for positioning the reinforcing guide tube 30 in the box 21 will be described with reference to FIG. An intermediate mounting plate 24 having an opening through which the reinforcing guide tube 30 can be inserted is fixed obliquely.
An opening through which the reinforcing guide tube 30 can be inserted is formed in the bottom plate or the side plate of the box 21.
The reinforcing guide tube 30 may be positioned at least at the two points of the intermediate mounting plate 24 and the bottom plate or side plate of the box 21.
The intermediate mounting plate 24 is a narrow plate body and can fill the entire area of the peripheral compartment 23 b with the consolidated material 25 through a gap formed between the intermediate mounting plate 24 and the box 21.
The intermediate intermediate mounting plate 24 is not essential and may be omitted. In short, it is only necessary that the reinforcing guide tube 30 can be held at a predetermined inclination angle with respect to the box 20.

<3.2.3> Relationship between reinforcing guide tube and box The reinforcing guide tube 30 is fixed to the box 31 in advance by welding or the like, or inserted without being fixed.

<3.3> Fixing Bolt The fixing bolt 26 is a bolt that is fixed upward on the bottom surface of the box 21, and has a total length that protrudes upward from the upper mouth surface of the box 21.
The column main body 10 can be fixed to the base block 20 by screwing the nut 27 onto the fixing bolt 25 inserted through the flange 12 of the column main body 10.

<4> Anchors The anchors 40a and 40b are known anchors such as rock bolts and ground anchors, and are fixed in the ground via the filler 41 filled in the anchor holes.
The anchors 40a and 40b are arranged radially toward the ground, and the base ends thereof are embedded in the base block 20.
In this example, two anchors 40a are installed on the sloped valley side with respect to the column main body 10, and one anchor 40b is installed on the sloped mountain side. However, the installation of each anchor 40a, 40b on the base block 20 is shown. The position and number of installations shall be appropriately selected according to the situation at the site.
The reason why the plurality of anchors 40a and 40b are employed as the fixing means of the base block 20 is to simplify the construction using a small construction machine and to obtain a high support reaction force without being influenced by the geology. is there.

<5> Consolidating Material The consolidating material 25 is a cement-based hardener such as mortar, and is filled in the entire area of the box 21 at the site as will be described later.

[How to construct a strut structure]
Next, a method for constructing the support structure will be described.

<1> Installation of Box The box 21 is installed horizontally on the ground G such as a slope.

<2> Anchor Work Next, a plurality of anchor holes 42 are radially drilled toward the extension line of the reinforcing guide tube 30 attached to the box 21.
These anchor holes 42 are drilled using a small gantry and a small boring machine.

<2.1> Insertion of Anchor In a state where the box 21 is grounded to the ground G and the plurality of reinforcing guide tubes 30 are inserted into the surface layers of the anchor holes 40a and 40b, the anchor holes 42 are passed through the reinforcing guide tubes 30. The anchors 40a and 40b are inserted into the inside.

<2.2> Filling Filler The anchor hole 42 is filled with a filler 41 such as mortar, and the anchors 40a and 40b are fixed in the ground.
Further, a solidifying filler 41 is filled in the entire area of the reinforcing guide tube 30.
The reinforcing guide tube 30 forms a highly rigid pile body by filling the reinforcing guide tube 30 with the filler 41 on the ground surface side of each anchor 40a, 40b.
Thus, a plurality of pile bodies can be formed on the same line as the anchors 40a and 40b only by filling the reinforcing guide tube 30 with the filler 41.

<2.3> Fixing of Anchor Base End When the filler 41 is uncured, the fixing tool 43 is attached to the exposed portion of each anchor 40a, 40b protruding from the base end of each reinforcing guide tube 30, and each anchor is fixed. The base ends of 40a and 40b are fixed.
In this way, the base ends of the anchors 40a and 40b fixed in the ground are connected to the box 21 to fix the box 21 so that it cannot be displaced.

<3> Standing up of the column body The fitting part 13 is inserted into the central compartment 23 a of the box 21, and the column body 10 is set up in the center of the box 21.
At this time, the fixing bolt 26 erected on the box 21 is passed through the flange 12 and tightened with the nut 27 to fix the column main body 10 to the box 21.
If the diameter of the insertion portion 13 is set so as to be inscribed in the central compartment 23a, the stability when the column main body 10 is built in the box 21 is improved.
When installing the column main body 1, the column main body 10 can be built with human power or small heavy machinery without requiring a large crane.

<4> Filling with Binder Material Immediately before the above-mentioned standing work of the column main body 10 or immediately after the standing work of the column main body 10, the whole area in the box 21 is filled with the bonding material 25, and FIG. , 3, a base block 20 having a synthetic structure is constructed.
As the consolidated material 25 filled in the compartments 23a and 23b is cured, the rigidity and strength of the base block 20 are increased in cooperation with the reinforcing plate 22.
The consolidated material 25 filled in the central compartment 23a adheres to the fitting insertion portion 13 of the column main body 10 and enhances the integration of the column main body 10 and the base block 20.
Further, the consolidated material 25 integrates the plurality of reinforcing guide tubes 30 and the base block 20.
The plurality of reinforcing guide tubes 30 extending downward to the bottom of the base block 20 function as reinforcing support piles for the support ground of the base block 20 and the base block 20.

  In the above manner, a support structure is constructed at a predetermined interval on the ground G such as a slope, and a protection fence is constructed by attaching a protection net or the like between adjacent support bodies 10.

In the strut structure of the present invention, the strut body 10 is erected on the base block 20, and therefore, a conventional concrete foundation with floor digging and a long and deeply-supported strut are not necessary.
Therefore, in this invention, compared with the support structure of the conventional support | pillar, a construction cost and a construction period can be reduced on the ground.

<5> Load bearing force of the column structure The load bearing force of the column structure will be described with reference to FIGS.
The column main body 10 constituting the column structure is firmly integrated by installing the fitting insertion portion 13 in the base block 20 having a composite structure.
The base block 20 that supports the column main body 10 is firmly supported by a plurality of reinforcing guide tubes 30 and a plurality of anchors 40a and 40b by obtaining reaction force in the ground.
In particular, the plurality of reinforcing guide tubes 30 and the plurality of anchors 40a and 40b are arranged radially with respect to the base block 20 so as to increase the supporting force and the supporting reaction force.
Therefore, when an impact is applied to the column main body 10, the column main body 10 is deformed, but the base plate 20 is firmly supported by the plurality of reinforcing guide tubes 30 and the plurality of anchors 40 a and 40 b, and therefore does not slide or fall. .
The impact force acting on the column main body 10 in this way is transmitted to the ground G through the bottom surface of the base block 20, the plurality of reinforcing guide tubes 30, and the plurality of anchors 40a and 40b.
In particular, not only the plurality of anchors 40a and 40b are used as the support means of the base block 20, but the reinforcement guide tube 30 functioning as a reinforcement support pile is used in combination.
Therefore, even if the support ground of the base block 20 is soft, the depression of the support ground can be suppressed and the base block 20 can be supported in a stable posture.

<6> Strength of base block The base block 20 can be made of a composite structure by the box 21 and the consolidating material 25 from which the reinforcing plate 22 is omitted. It must be thick.
In the present invention, since the plurality of reinforcing plates 22 are arranged in the box 21, the rigidity and strength of the base block 20 can be increased. Therefore, the thickness of the base block 20 is reduced and the filling amount of the consolidated material 25 is reduced. be able to.
The plurality of reinforcing plates 22 not only function as a reinforcing material for the box 21, but also constrain the consolidated material 25 filled in the box 21 in units of small sections to increase the restraining effect of the consolidated material 25. Function.
Therefore, even if a large impact force acts on the base block 20, it is possible to reliably prevent the base block 20 from being broken.

Further, the impact load acting on the column body 10 is concentrated on the lower portion of the column body 10 and the fitting portion of the base block 20.
The periphery of the central compartment 23 a of the base block 20 is reinforced by a plurality of reinforcing plates 22 and a consolidated material 25.
Therefore, even if stress concentrates on the lower part of the column main body 10 and the fitting part of the base block 20, the fitting part of the base block 20 does not need to be destroyed, and an impact force is applied from the column main body 10 to the base block 20. Can communicate.

<7> Replacement of the column body When an impact is applied to the column structure as described above, the base plate 20, the plurality of reinforcing guide tubes 30, and the plurality of anchors 40a and 40b remain intact without being damaged. Only the column body 10 is deformed.
In the present invention, the post body 10 deformed in the following manner can be removed and replaced with a new one.

In order to remove the deformed column body 10, the column body 10 is removed from the base plate 20 after removing the nut 27 from the fixing bolt 26.
When the consolidated member 25 is attached to the insertion portion 13, the column body 10 is removed by swaying the column body 10 back and forth or left or right by hanging a part of the consolidated material 25. be able to.
After the column main body 10 is removed, a central compartment 23a appears in the removal mark at the center of the base plate 20.
A new column body 10 is erected on the base plate 20 using the central compartment 23a. Since the method of standing the column main body 10 is as described above, the description thereof is omitted.

  As described above, when the column main body 10 is deformed, only the column main body 10 can be replaced, and the existing base plate 20, the plurality of reinforcing guide tubes 30, and the plurality of anchors 40a and 40b are not replaced. It can be utilized, and the column main body 10 can be exchanged economically and in a short time.

[Other Embodiments]
<1> Other forms in which the base ends of the anchors are exposed In the previous form, the case where the base ends of the plurality of anchors 40a and 40b are buried in the consolidated material 25 has been described, but the plurality of anchors 40a and 40b It is also possible to expose only the base end of.
When the caulking member 21 is filled with the caking material 25, if the caulking material 25 is shielded from entering the proximal ends of the anchors 40a and 40b, the proximal ends of the anchors 40a and 40b It is possible to expose only.
In this example, since the base ends of the plurality of anchors 40a and 40b are exposed in the base block 20, the anchors 40a and 40b that have been loosened for a later reason can be easily tensioned, and the base block 20 is good. A sufficient supporting force can be ensured over a long period of time.

<2> Other Forms for Fixing the Column Main Body to the Base Block In the previous embodiment, the configuration in which the column main body 10 is fixed to the base block 20 by connecting the fixing bolts 26 to the flange 12 has been described. It may be embedded in the binder 25 and fixed.
Alternatively, the fitting insertion portion 13 that does not have the flange 12 may be embedded in the consolidation material 25 and fixed.

Further, as shown in FIG. 6, the fitting insertion portion 13 of the column main body 10 is formed longer than the thickness of the base block 20, and a part of the fitting insertion portion 13 of the column main body 10 extends from the bottom of the base block 20 to the ground. There is also a case of projecting directly downward.
In this example, since the high stability of the base block 20 is ensured by the plurality of anchors 40a and 40b and the plurality of reinforcing guide tubes 30, the protruding length of the fitting insertion portion 13 of the column main body 10 is so long. Even if it does not do, there exists an advantage that stability of the support | pillar main body 10 improves markedly.

  Moreover, you may combine suitably the several fixing means of the above-mentioned support | pillar main body 10 and the base block 20. FIG.

<3> Other Embodiments for Increasing Bond Strength between Reinforcing Plate and Binder In the previous embodiment, the case where the reinforcing plate 22 is a non-porous plate has been described. However, an opening is opened on the plate surface of the reinforcing plate 22. Alternatively, a protrusion such as a gibber may be provided on the plate surface of the reinforcing plate 22.
Continuity is imparted to the consolidated material 25 between the adjacent compartments 23a, 23b through the opening of the reinforcing plate 22, and a protrusion is provided on the reinforcing plate 22 to provide a connection between the reinforcing plate 22 and the consolidated material 25. The adhesion strength is increased, and the rigidity and strength of the base block 20 as a whole are further increased.

G ·························································································································· Flange 13 Base block 21 ... Box 22 ... Reinforcement plate 23 ... Compartment 23a ... Central compartment 23b ... Peripheral compartment 24 ... Intermediate mounting Plate 25... Solidified material 26... Fixing bolt 26 a... Opening 27... Nut 30. Reinforcing guide tube 40 a. 40b ··· Anchor 41 on the slope valley side ··· Filling material 42 ··· Anchor hole 43 ··· Fixing tool

The present invention relates to a protective fence comprising a column main body, a base block that is grounded to the ground and is detachably integrated with the lower portion of the column main body, and a plurality of anchors that obtain reaction force from the ground and are connected to the base block. The base block has a bottomed structure in which the base block is partitioned by a plurality of reinforcing plates to form a plurality of compartments, or a cylindrical structure having an open top and bottom , and the box is filled And a plurality of reinforcing guide tubes that extend downward from the bottom surface of the box and pass through the anchor, and a fitting insertion portion at a lower portion of the column main body is provided in the compartment of the box. and fitted, erected enable removal of said post body to the base block, to form a reinforcing bearing pile of the base block integrally by filling solidification of the filler in the reinforcing guide tube, the entire of the box making body and through the filled Katayuizai, fitting the strut body And between the parts and the base block, characterized in that a proximal end of said plurality of reinforcing support piles and connecting the base block.
In another embodiment of the present invention, the plurality of reinforcing guide tubes and the plurality of anchors may be arranged radially with respect to the box.
In another embodiment of the present invention, a plurality of peripheral compartments are formed around the central compartment of the box, and the base ends of the anchors are connected to each other in a separable manner by a solidified material filled in some peripheral compartments. To do.
In another embodiment of the present invention, the insertion portion of the column main body may be formed longer than the thickness of the base block, and a part of the insertion portion may protrude downward from the bottom of the base block to the ground. .

Claims (4)

A strut structure comprising a strut body, a base block that is grounded to the ground and is detachably integrated with a lower portion of the strut body, and a plurality of anchors that obtain reaction force from the ground and connect to the base block. ,
A box in which the base block is partitioned by a plurality of reinforcing plates;
A consolidated material filled in the box;
A plurality of reinforcing guide tubes extending downward from the bottom surface of the box, and inserting the anchor;
Insert the lower insertion portion of the column body into the center of the box, and connect the column body to the base block so that it can be removed.
Filling the reinforcing guide tube with a solidifying filler to form a reinforcing support pile integral with the base block;
The box is filled with a caking material, and the base ends of the plurality of anchors and the reinforcing guide tube are connected to the base block in an inseparable manner,
Prop structure.   The column structure according to claim 1, wherein a plurality of reinforcing guide tubes and a plurality of anchors are arranged radially with respect to the box.   A plurality of peripheral compartments are formed around the central compartment of the box, and the proximal ends of the anchors are connected inseparably by a solidified material filled in some peripheral compartments. Item 3. The support structure according to item 1 or 2.   The support structure according to any one of claims 1 to 3, wherein the support structure is a support fence support.

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