JP5856333B1 - Standing method for supporting fence and its supporting pillar - Google Patents

Abstract

An object of the present invention is to provide a stand-up technique for a guard fence that can easily stand a pillar without drilling using a down-the-hole hammer and can significantly reduce the cost of standing the pillar. SOLUTION: A compacting jig 80 that can be hit by being inserted into a column made of a hollow tubular body having upper and lower ends opened, and an outer body that strikes the compacting jig 80 and constitutes the column together with the compacting jig 80. A portion of the pipe 30 penetrates into the ground and is built, and the earth and sand taken into the outer pipe 30 is consolidated by a compacting jig 80 to form a consolidated earth lump G1, and the inside of the outer pipe 30 closed by the consolidated earth lump G1. The entire area is filled with a caking material, and the compacted earth lump G1 and the caking material are integrated via the outer tube 30. [Selection] Figure 8A

Description

  TECHNICAL FIELD The present invention relates to a standing technique for a protective fence post that prevents disasters such as falling rocks, avalanches, and fallen earth and sand, and in particular, a standing method for a protective fence pillar that is driven into the ground without drilling and stands upright. Regarding the column.

A pile-type protective fence is known in which a part of a steel pipe support is built deep underground, and a protective net is attached to the ground part of the support (Patent Document 1).
A plurality of brackets are welded to the ground portion of the support fence post at a predetermined interval, and a plurality of horizontal ropes constituting a protection net are held by holding means provided in each bracket.
Patent Document 2 discloses an assembling-type column in which a column main body is divided into upper and lower parts in order to improve the transportability and carry-in property of the column.
This assembly-type column consists of a steel pipe outer pipe, middle pipe, and inner pipe triple pipe. The lower part of the inner pipe containing the inner pipe is inserted into the upper end of the outer pipe built deep in the ground, and the outer pipe The overlapping portions of the annular flanges provided respectively in the upper end of the tube and in the middle of the middle pipe are connected by bolts.
In order to erect this type of support, 1) a drilling process for drilling deep into the ground using a danza hole hammer as disclosed in Patent Document 3, and 2) removing the danza hole hammer 3) a step of assembling the column main body by inserting each pipe constituting the column main body into the hole, and 4) a step of integrating the triple tube by filling the inside of the column main body with a cement-based caking material. After standing up.

JP 2008-31740 A (FIGS. 1 and 2) JP 2009-24479 A (FIG. 2) Japanese Patent Laid-Open No. 9-48588 (FIG. 4)

The conventional technology for erecting a guard fence post using a down-the-hole hammer has the following problems.
<1> Because down-the-hole hammer works using a large construction machine such as a crane, the drilling cost of one hole is the same as or more than the unit price of the support and becomes extremely high.
For this reason, the construction cost of the support fence is an increase factor of the construction cost of the protective fence.
<2> When the support has a composite structure, the solidified material is filled over the entire length of the support main body from the viewpoint of ensuring strength.
Therefore, a large amount of caking material that fills the entire internal space of the column main body is required, and the caking material cost contributes to an increase in column cost.
<3> The spread of pile-type protective fences is hampered by the increased construction costs and material costs described above.
In order to spread functionally superior pile-type protective fences, proposals for improved technology that can significantly reduce construction costs and material costs are eagerly desired.
<4> In a small-medium-sized protective fence, reducing the diameter of the column is beneficial in terms of workability and construction cost.
If a support | pillar is made into a synthetic structure, a diameter of a support | pillar can be reduced compared with the thing of a general non-synthetic structure.
On the other hand, when the composite strut is reduced in diameter, welding heat partially acts on a part of the strut when a plurality of brackets are welded and attached to one side of the outer peripheral surface of the steel pipe constituting the strut body. The support post causes thermal deformation (distortion).
In particular, fixing the brackets of the terminal struts that are gripped and fixed near the ends of the lateral ropes requires welding that exceeds the breaking strength of the lateral ropes, so the terminal struts are likely to cause thermal deformation.
For this reason, there was a limit to reducing the diameter of the support.

A method of driving a steel pipe having an open-ended structure directly into the ground without drilling with a down-the-hole hammer is conceivable. However, this driving method includes the following new problems to be solved.
When the <1> support is directly penetrated into the ground, a large amount of earth and sand enters the support, and the space for filling the consolidated material is lost by the amount of the earth and sand that has entered.
In a structure in which a large amount of earth and sand is left inside the column, a desired column strength cannot be obtained.
In order to obtain a desired strut strength, it is necessary to fill the consolidated material after discharging the earth and sand that has entered inside the strut to the outside. For this purpose, the work of pulling out the pillars and the work of discharging the earth and sand in the pillars are newly increased, but the possibility that the hole wall is self-supporting due to the pulling resistance is extremely low.
<2> When the lower end of the support is covered with a lid to prevent the entry of earth and sand, the penetration resistance increases and it becomes difficult to drive the support.
In addition, when the lower end of the column collides with a boulder or cobblestone, the lid is easily damaged.
Furthermore, when a steel pipe column is immersed in a plating tank for plating, there is no outlet for the plating solution, and a new plating method must be considered.

The present invention has been made in view of the above points, and an object of the present invention is to provide at least one of the following methods for erecting a protective fence post and the support post.
<1> The column can be erected without using the down-the-hole hammer, and the erection cost of the column can be greatly reduced.
<2> The filling amount of cement-based consolidated material can be reduced while avoiding a decrease in strut strength.
<3> When the support column is an assembly type, the impact load can be distributed and transmitted over the entire length of the support column while maintaining the advantages of the assembly type support column, and can cope with a large-scale impact load.
<4> The total load length can be shortened by distributing the load of the column to each member.

The present invention is, after that built up by implanting prefabricated posts assembled by polymerizing with each other part of the double several tubes into the ground, for safety barriers erected by filling a consolidating material to said supporting the pillar A method for erecting a column, an exterior pipe having an exposed portion projecting over a predetermined ground range upward from the ground surface, an exterior tube having a built-in portion built into the ground, and an exposed portion projecting to the ground surface An assembly-type column having an insertion tube having an insertion portion to be inserted into the outer tube, and a compacting jig that can be struck by being inserted into the column and striking the compacting tool. The built-in portion of the outer tube is inserted into the ground together with a jig, and the earth and sand taken in the outer tube is struck with the compacting jig to form a consolidated earth block at the lower portion of the outer tube, and the consolidated earth block Insert the insertion part of the inner intubation inside the outer tube closed by Of the consolidated material is filled in the whole, characterized in that through the outer tube constrained integrally with said compaction clods and caking material.
In another embodiment of the present invention, a connecting tool is inserted between the exposed portion of the outer tube and the insertion portion of the inner tube before filling with the consolidated material, and the outer tube and the inner tube are inserted through the connector. It is good to connect so that rotation is impossible.
In addition, the present invention provides a protective fence in which an assembly-type column that is assembled by superposing a part of a plurality of pipes is assembled into the ground, and then the column is filled with a solidified material to stand. An outer tube having an exposed portion projecting over a predetermined ground range upward from the ground surface, an exposed tube projecting to the ground surface, and the exterior an inner intubation with an insertion portion to be inserted into the tube, and strikeable compaction fixture by interpolation on the intubation, before and consolidation clods of earth and sand of Kigaiso tube was compacted by the compaction fixture, through the intubation An inner tube and a consolidated material filled in the entire interior of the outer tube are provided, and the outer tube is integrated by constraining the compacted earth lump and the consolidated material.
In another embodiment of the present invention, a connecting tool is inserted between the exposed portion of the outer tube and the insertion portion of the inner tube, and the outer tube and the inner tube are non-rotatably connected via the connector. Good.
According to another aspect of the present invention, the assembly-type column includes a restriction means for the insertion position of the intubation tube, and the restriction means has an annular shape fixed to the exposed portion of the insertion tube and the boundary portion of the insertion portion. It is a shade, and the boundary between the exposed portion of the inner intubation and the insertion portion may be sealed via the stopper shade.
In another embodiment of the present invention, there are provided a plurality of holding means for holding a plurality of lateral ropes arranged in multiple stages over the entire length of the exposed portion of the outer tube and the exposed portion of the inner tube.
In another embodiment of the present invention, an annular bracket may be attached to the exposed portion of the outer tube and the exposed portion of the inner tube by welding, and a holding means may be provided on a part of the annular bracket.
In another embodiment of the present invention, an internal reinforcing material having a length equal to the stress concentration range of the support column may be further provided, and the internal reinforcing material may be positioned inside the intubation tube for reinforcement.
In another embodiment of the present invention, an external reinforcing material having a length equal to the stress concentration range of the support column is further provided, and the external reinforcing material is integrally fixed to the outer peripheral surface of the outer tube and reinforced. Good.
In another embodiment of the present invention, the overall length of the exposed portion of the outer tube is about 0.5 to 2 m .

The present invention has at least one of the following effects.
<1> Since the tubular body constituting the support can be driven and set up, the setup cost of the support can be greatly reduced as compared with the conventional method of drilling using a down-the-hole hammer.
<2> Since the earth-and-sand compacted lump formed in the lower part of the pipe body that constitutes the column can be used as an alternative to the consolidated material, the filling amount of cement-based consolidated material is reduced while avoiding the decrease in the strength of the column. can do.
<3> Since construction costs and material costs can be greatly reduced, it is possible to contribute to the spread of functionally excellent pile-type protective fences.
<4> When the support is an assembly type, the impact load can be distributed and transmitted over the entire length of the support while maintaining the advantages of the assembly type support, and the impact load is larger than the support diameter. Can do.
<5> It is possible to prevent rainwater from entering due to the waterproof action of the stopper shade while preventing soil and sand from being mixed into the consolidated material, and to obtain a high-quality support.
<6> When the outer tube and the inner tube are firmly connected by a connector, the rotation of the inner tube can be reliably prevented when the horizontal rope is stretched or when an impact is applied to the protective fence.
<7> When the holding means of the horizontal rope is provided via the annular bracket welded to the exposed part of the tubular body that constitutes the support column, the annular bracket can be attached not only by the simple work of all-around welding. Further, it is possible to effectively prevent the support column from being deformed by welding heat.
<8> When the support is an assembly type, the total load of the support can be shortened by distributing the load of the support to each member.

The perspective view of the guard fence concerning Example 1 which a part was omitted Cross-sectional view of II-II in Fig. 1 (A) is a perspective view of an exterior tube with the middle omitted, (B) is a perspective view of an internal intubation with the middle omitted, and (C) is a perspective view of an external reinforcing member with the middle omitted. Perspective view of the overlapped part of the strut with the outer tube, inner tube, and internal reinforcement FIG. 5 is an explanatory view of a friction sliding type holding means, (A) is an assembly view of attaching the friction sliding type holding means to the annular bracket, and (B) is a plan view of the friction sliding type holding means attached to the annular bracket. Perspective view of mooring type holding means Sectional view of VII-VII in FIG. Longitudinal section of an outer tube driven into the ground using a compacting jig It is explanatory drawing of the construction method of a support | pillar, (A) is explanatory drawing of the process of driving in an exterior tube using a compacting jig, (B) is explanatory drawing of the process of inserting an intubation tube in an exterior tube. It is explanatory drawing of the construction method of a support | pillar, (C) is explanatory drawing of the process of suspending an internal reinforcement material in an internal intubation, (D) is explanatory drawing of the process of filling a solidification material inside a support | pillar. It is explanatory drawing of a compacting jig, (A) is a perspective view of a non-length-adjustable compacting jig with a part omitted, and (B) is a perspective view of a length-adjustable compacting jig with a part omitted. It is a model figure of the protection fence provided with the conventional protection fence and the support | pillar of this invention, (A) is the model figure of the conventional protection fence, (B) is the model figure of the protection fence provided with the support | pillar of this invention. It is explanatory drawing of the support | pillar which concerns on Example 2, (A) is a perspective view of the exterior tube which abbreviate | omitted the middle, (B) is sectional drawing of the completed support | pillar

  The present invention will be described in detail with reference to the drawings.

[Example 1]
<1> Outline of Guard Fence The guard fence illustrated in FIG. 1 will be described. The protective fence includes a plurality of support posts 10 (terminal support posts 10 a and intermediate support posts 10 b) that are erected at intervals, and a protection net 20 that is installed horizontally between these support posts 10.
In this example, the separation holding material 11 is disposed vertically across the plurality of horizontal ropes 21 constituting the protective net 20, and the crossing portion is fixed to keep the distance between the horizontal ropes 21 constant, and further adjacent to each other. Although the support beam 12 for holding the space is horizontally mounted between the heads of the support columns 10, the space holding material 11 and the support beam 12 are not essential and may be omitted.

<2> Assembling-type column In this example, the case where the column 10 is an assembling-type column in which a plurality of steel pipes and the like are combined will be described.
The assembly-type column 10 includes two types of terminal column 10a and intermediate column 10b, and both columns 10a and 10b have the same structure except for the holding means 13 and 14 of the horizontal rope 21 that forms the protective net 20. Hereinafter, the two types of struts 10a and 10b will be described as a common strut 10 except for the holding means 13 and 14 of the horizontal rope 21.
Referring to FIGS. 2 and 3, the assembling-type support column 10 includes an outer tube 30 in which the upper part of the pipe projects to the ground surface G and the lower part of the pipe is built in the ground, and the upper part of the pipe is exposed to the ground surface G and the lower part of the pipe is exteriorized. The inner tube 40 inserted into the tube 30, the internal reinforcing member 50 accommodated in the inner tube 40, and both tubes except for the lower part of the outer tube 30 by filling the tubes 30 and 40 in the field. and 30, 40 and caking material 15 cementitious integrating three members of the inner stiffener 50, and and a consolidation clod G ₁ housed in a compacted state in the lower part of the outer tube 30, steel and Katayuizai It is a strut with a hybrid composite structure made of compacted soil.
Both the outer tube 30 and the inner tube 40 have a plurality of holding means 13 and 14 for holding the respective horizontal ropes 21 over a predetermined range of the upper portion of the tube protruding upward from the ground surface G.
The outer tube 30 has a larger diameter than the inner tube 40, and when the inner tube 40 is inserted into the outer tube 30, an annular gap is formed between the peripheral surfaces of both the tubes 30, 40. It becomes a space for filling.
The total length of the erected portion 32 below the outer tube 30 is longer than the entire length of the inner intubation 40. For example, the lower insertion portion 42 of the inner tube 40 has a length that is ½ or more of the entire length of the outer tube 30. When the pipes 30 and 40 are installed in the ground, the outer tube 30 reaches the deepest part.
The total length of the internal reinforcing member 50 is the same as that of the inner intubation tube 40 or is slightly shorter than the total length of the inner intubating tube 40, and the internal reinforcing member 50 is not only in the exposed portion 41 of the inner intubating tube 40 but also It arrange | positions ranging over the suitable range of the superposition | polymerization part of the insertion part 42 and the exterior pipe | tube 30. FIG.
The lower part of the internal reinforcing member 50 is inserted, for example, by a length that is 1/2 or more of the entire length of the outer tube 30.

<2.1> Outer Tube Referring to FIG. 3 (A), the outer tube 30 is a hollow tube having a uniform diameter with both ends opened to be built in the ground, and protrudes upward from the ground surface G. And an erected part 32 that is driven into the ground and built.
The length of the exposed portion 31 of the outer tube 30 is appropriately selected according to the overall height of the protective fence and the type of the collision object, but has a length of at least 0.5 m from the ground surface G, and practically from the ground surface G. It is desirable to have a length of about 1 to 2 m.
The erected portion 32 of the outer tube 30 has an appropriate length according to the geology, maximum impact load, and the like.

<2.2> Inner tube Referring to FIG. 3 (B), the inner tube 40 is a hollow tube having a uniform diameter that is open at both ends for being inserted into the outer tube 30 and standing. An exposed portion 41 protruding upward from 30 and an insertion portion 42 to be inserted into the outer tube 30 are provided.
The length of the exposed portion 41 of the inner intubation 40 is appropriately selected according to the overall height of the protective fence.
The length of the insertion portion 42 of the inner intubation 40 is preferably at least ½ of the entire length of the outer tube 30.
A plurality of projecting spacers 43 for centering project from the outer peripheral surface of the insertion portion 42 of the inner intubation 40 at a predetermined interval.
The plurality of protrusion spacers 43 are protrusions that can contact the inner peripheral surface of the outer tube 30, and the inner insertion tube 40 can be inserted into the outer tube 30 via the plurality of protrusion spacers 43.

<2.3> Restriction Means for Insertion Position of Inner Tube with respect to Outer Tube The support column 10 has restriction means for the insertion position of the inner insertion tube 40 with respect to the outer tube 30.
With reference to FIG. 4, the control means of the insertion position of the inner tube 40 with respect to the exterior tube 30 will be described. On the outer peripheral surface of the boundary portion between the exposed portion 41 and the insertion portion 42 of the inner intubation 40, there is an annular stopper shade 45 protruding in the radial direction.
The stopper shade 45 can restrict the insertion position of the inner insertion tube 40 with respect to the outer tube 30 to a specific position by bringing the lower surface of the stopper shade 45 into contact with the upper mouth end of the outer tube 30.
The reason why the stopper shade 45 is formed in an annular shape is to block the upper opening of the outer tube 30 and prevent water from entering from the outside.

<2.4> Means for Preventing Rotation of Outer Tube and Inner Tube The strut 10 includes means for preventing rotation of the outer tube 30 and the inner tube 40.
Referring to FIG. 4, in this example, one or a plurality of through holes 33, 46 provided on the upper peripheral surface of the exposed portion 31 of the outer tube 30 and the lower peripheral surface of the stopper shade 45 of the inner tube 40, It consists of a combination with one or a plurality of through-bolts, nuts, and other connecting tools 34 that are inserted through the through-holes 33, 46 of both the tubes 30, 40.
By passing the connector 34 through the overlapping portions of both the pipes 30 and 40 and the internal reinforcing member 50, the rotation between the pipes 30 and 40 can be reliably prevented.

<2.5> Holding means for horizontal rope The protective fence presupposed by the present invention is not only provided with a plurality of holding means 13 (14) of the same kind on the exposed portion 31 of the outer tube 30, but also the exposed portion 41 of the inner tube 40. In addition, a plurality of holding means 13 (14) of the same kind are provided at intervals, and a plurality of horizontal ropes 21 can be held over the range of the exposed portions 31 and 41 of both tubes 30 and 40.
Hereinafter, the friction sliding type holding means 13 applied to the terminal column 10a and the mooring type holding means 14 applied to the intermediate column 10b will be described.

<2.5.1> Friction sliding type holding means FIG. 5 shows the friction sliding type holding means 13 provided on the exposed portion 31 of the outer tube 30 and the exposed portion 41 of the inner intubation 40 constituting the terminal column 10a. Show.
The holding means 13 is a shock absorber provided with two clamping plates 13a, 13a and fasteners such as grip bolts 13b and nuts 13c capable of fastening the clamping plates 13a, 13a. The exposed portions 31 and 41 are provided at equal intervals.
The opposing surface of each clamping plate 13a has a semicircular groove that can accommodate the horizontal rope 21, and can grip the outer peripheral surface of the horizontal rope 21 when the clamping plates 13a and 13a are brought into contact with each other. A groove 13d is formed.
Further, a plurality of through holes 13e are formed in the plate surfaces of both the sandwiching plates 13a, 13a, and the nut 13c is fastened to the holding bolt 13b inserted through the through hole 13e, thereby holding the horizontal rope 21 with a predetermined holding force. It is possible to hold.
The friction sliding type holding means 13 is not limited to this example, and a known shock absorber can be applied.

<2.5.1.1> Annular Bracket In order to prevent thermal deformation due to welding heat of the terminal column 10a, the holding means 13 is attached using the annular bracket 16.
Referring to FIG. 5, the annular bracket 16 includes a ring portion 16 a that can be externally welded to the outer tube 30 or the inner tube 40, and a mounting plate 16 b that is suspended from a part of the ring portion 16 a.
Grooves 16c that can accommodate the shafts of the grip bolts 13b are formed in the upper and lower portions of the mounting plate 16b.
In this example, the holding bolts 13b and nuts 13c housed in the respective housing grooves 16c are utilized to fix the holding means 13 to the mounting plate 16b, while the two holding plates 13a and 13a constituting the holding means 13 are fixed to each other. Although the case where the gripping force is applied is shown, these may be performed by individual bolts and nuts.

<2.5.1.2> Reason for adopting the annular bracket Since the terminal column 10a is subjected to a larger load via the lateral rope 21 than the intermediate column 10b, it is necessary to attach the holding means 13 firmly.
If a single piece bracket is welded to a part of the outer periphery of the terminal column 10a as in the conventional mounting technique, the welding heat is biased and the steel column terminal column 10a may be thermally deformed.
Therefore, the annular bracket 16 is employed in order to apply the welding heat evenly to the entire peripheral surface of the terminal column 10a.
By using the annular bracket 16, the space between the ring portion 16a and the outer tube 30 or the inner insertion tube 40 made of a small and medium diameter steel pipe can be firmly fixed by simple all-around welding.

<2.5.2> Mooring Type Holding Means The mooring type holding means 14 illustrated in FIG. 6 will be described.
The mooring-type holding means 14 is a mooring member for mooring the horizontal rope 21 to the intermediate strut 10b in an inseparable manner, and is provided at equal intervals over the exposed portions 31 and 41 of both pipes 30 and 40.
The holding means 14 of this example includes a ring body 14a through which the horizontal rope 21 can be inserted and a fixing portion 14b for fixing the ring body 14a. The fixing portion 14b is arranged around the exposed portions 31 and 41 of both tubes 30 and 40. It is integrally fixed to a bracket 19 protruding from the surface.
As the holding means 14 other than that illustrated, both ends of the U-shaped hook or a part of the ring may be directly fixed to the outer peripheral surface of the intermediate column 10b.

<2.6> Internal Reinforcement Material The internal reinforcement material 50 is an upper and lower continuous section of the ground surface G of the support column 10 and is a steel pipe reinforcement that continuously reinforces the stress concentration range where the largest bending moment acts. It is a material.

The internal reinforcing material 50 will be described with reference to FIG.
The internal reinforcing member 50 of this example is a hollow reinforcing core 51 made of a square pipe or the like, and a strip-shaped inner reinforcing plate 52 that is a main reinforcing member integrally attached to a pair of opposing short side surfaces of the reinforcing core 51. And an outer reinforcing plate 53 which is a sub-reinforcing material integrally provided on the side surface of the inner reinforcing plate 52.
The core material 51 is not limited to a square pipe with both ends open, and includes a known steel material such as H steel.
The thickness and width of the inner and outer reinforcing plates 52 and 53 are not limited to the illustrated form, and are appropriately selected. Further, one of the inner and outer reinforcing plates 52 and 53 may be omitted.
The total length of each material constituting the internal reinforcing member 50 is formed to be shorter in the order of the reinforcing core 51, the inner reinforcing plate 52, and the outer reinforcing plate 53.
The ground section and underground section of the column 10 where the greatest bending moment is generated are reinforced by stacking both reinforcing plates 52 and 53 on both sides (the tension side and the compression side) of the reinforcing core 51, and then the next largest bending moment. In the section where the occurrence occurs, the inner reinforcing plate 52 is provided on both sides (the tension side and the compression side) of the reinforcing core 51 for reinforcement.

  The internal reinforcing material 50 is not limited to the above-described form, and a combination of various known reinforcing members can be applied. Further, the internal reinforcing material 50 may be omitted.

<3> Protective Net In this example, the protective net 20 is attached to a plurality of horizontal ropes 21 and a plurality of horizontal ropes 21 made of metal or fiber that are horizontally mounted between adjacent support columns 10 in a multistage manner. However, the protective net 20 is not limited to the illustrated form, and is a known protective net capable of catching falling rocks, avalanches, landslides, and the like. including.

<4> Consolidation Jig Referring to FIGS. 8A and 9, the consolidation jig 80 is inserted into the outer tube 30 when the outer tube 30 is built in the ground, and enters the outer tube 30. It is a jig for pressing and compacting earth and sand.
The consolidation jig 80 has a columnar shape, and includes a flange 81 that can be inserted into the outer tube 30, and a receiving head 82 that cannot be inserted into the outer tube 30 that is formed by expanding the diameter of the proximal end of the flange 81. To do.
A pressing portion 83 that can be inscribed in the outer tube 30 is formed at the tip of the collar portion 81, and the pressing portion 83 blocks the inner space of the outer tube 30, so that the take-in space 35 is formed below the outer tube 30. Is defined.
One or a plurality of centering spacers 84 are provided on the peripheral surface of the flange portion 81.
The receiving head 82 is a receiving member having a diameter larger than that of the outer tube 30, and the driving force acting on the head 82 is applied to the outer tube by bringing the lower surface of the receiving head 82 into contact with the upper mouth end of the outer tube 30. 30.
The compacting jig 80 illustrated in FIG. 9 will be described. FIG. 9A shows a form in which the flange 81 is formed by a single member.
(B) of the same figure shows the form comprised so that adjustment of the full length of the collar part 81 was possible. In this example, the collar portion 81 is composed of a plurality of slidable inner tubes 81a and outer tubes 81b, the inner tube 81a and the outer tube 81b are slid to adjust the overall length, and pin holes drilled in both tubes 81a and 81b. Although the connection pin 81c is inserted and fixed in Fig. 1, a known mechanism can be applied to the length adjusting mechanism of the flange 81.

<4.1> With reference to full-length view 8A of the rod portion, the total length _{L 4} of the punch portion 81 of the compaction fixture 80 is shorter than the total length _{L 5} of the outer tube 30 and inner shown in FIG. 2 intubation is approximately equal size relationship between the overall length _{L 6} of the insertion portion 42 of 40.
The reason why the overall length of the flange 81 of the consolidation jig 80 is in such a dimensional relationship is that when the outer tube 30 is driven into the ground, a predetermined axial length (L ₅ -L) is inserted into the tube through the lower opening of the outer tube 30. ₄ ) To take in the earth and sand.

<4.2> Connection Means for Consolidation Jig and Outer Tube When using the consolidation jig 80, a connecting bolt 85 is inserted between the upper portion of the consolidation jig 80 and the outer tube 30 to connect the consolidation jig 80 and the outer tube. The pipe 30 is connected.
The reason why the compacting jig 80 and the outer tube 30 are integrally connected via the connecting bolt 85 is to prevent rattling when the outer tube 30 is driven and to adjust the height of the outer tube 30 to be built.

[How to construct a protective fence]
Next, a construction method of the protective fence will be described with reference to FIGS.
8A to 8C, for the sake of convenience, the holding means 13 and 14 of the support column 10 (terminal support column 10a and intermediate support column 10b) are omitted for the sake of convenience.

<1> Bringing the material of the strut into the field As shown in FIG. 3, the assembly-type strut 10 has the exterior tube 30, the inner intubation 40, and the internal reinforcement member 50 separated and independent from each other. After each material is transported separately and carried into the site, the monolithic strut 10 is assembled at the site through work steps described below. Therefore, even if it is a narrow construction site, it is easy to carry in and construct materials.

<2> Installation of exterior pipe (Fig. 8A, Fig. 8B (A))
The consolidation jig 80 is inserted into the exterior pipe 30 to be built, and the consolidation jig 80 and the exterior pipe 30 are integrally connected via a connection bolt 85.
The outer tube 30 integral with the compacting jig 80 is lifted, and a driving force is applied to the receiving head 82 of the compacting jig 80 to penetrate the outer tube 30 into the ground and build it to a predetermined depth.
The outer tube 30 is not built in its entire length, but is built to a depth at which the exposed portion 31 of the outer tube 30 protrudes from the ground surface G by a predetermined length.
As the driving means 90 for the outer tube 30, for example, a known monken or various pile driving machines can be used. Practically, a guardrail strut driving machine is suitable.
Further, since the impact force is not applied directly to the upper end of the outer tube 30 but indirectly through the receiving head 82 of the compacting jig 80, the upper end portion of the outer tube 30 is crushed or deformed. Can be prevented.

<3> Consolidation of pipe soil (Fig. 8A, Fig. 8B (A))
Since the lower end opening of the outer tube 30 remains open, the earth and sand gradually enter the take-in space 35 of the outer tube 30 as the outer tube 30 is driven.
Continuing the driving operation of the exterior tube 30, the pressing portion 83 of the compaction fixture 80 is gradually consolidate the filled earth and sand with the accepting space 35 to form a compacted soil mass G _1.
Even if cobblestone or the like is present in the earth and sand taken into the intake space 35, the pressing portion 83 of the compacting jig 80 presses the cobblestone or the like, so that the driving of the outer tube 30 is not hindered.
Since there is no earth and sand escape space in the intake space 35, the consolidation of the compacted soil mass G ₁ proceeds in proportion to the depth of the external pipe 30, and the hardness gradually increases. It adheres and cannot be separated.

<4> Removal of Consolidation Jig When the installation of the outer tube 30 is completed, the connecting bolt 85 shown in FIG. 8A is extracted, and the consolidation jig 80 in the outer tube 30 is removed.
When removing the compaction fixture 80, compacted soil mass G ₁ taken with the accepting space 35 closes the bottom of the jacket tube 30, above the compacted soil mass G ₁ of the outer tube 30 remains open space.
In other words, the outer tube 30 is by the height of the raised bottom forming a compacted soil mass G _1.
The collected compaction jig 80 can be diverted and is repeatedly used in the standing work of a new support column 10.

<5> Insertion of intubation (FIG. 8B (B))
The insertion portion 42 of the inner intubation tube 40 is inserted into the outer tube 30 through the upper opening of the outer tube 30.
The lower surface of the stopper cap 45 protruding from the peripheral surface of the inner intubation 40 abuts the upper end of the outer tube 30, so that further insertion of the inner intubation 40 is restricted, and the inner intubation 40 is positioned in a suspended state. . The weight of the inner tube 40 is supported by the outer tube 30 via the stopper shade 45.
If the total length L ₄ of the punch portion 81 of the already described compaction fixture 80 is equal to the total length L ₆ of the insertion portion 42 of the inner cannula 40, with the lower surface of the stopper bevel 45 abuts the Kamiguchi end of the outer tube 30, lower end of the inner cannula 40 is also brought into contact with the upper surface of the compacted soil mass G _1.

<5.1> Space closure by stopper shade (Fig. 8B (B))
When the lower surface of the stopper shade 45 abuts against the upper mouth end of the outer tube 30, the stopper shade 45 closes the upper mouth of the annular space formed between the peripheral surfaces of both the tubes 30 and 40.

<5.2> The part of the column projecting to the ground surface (FIG. 8C (C))
By inserting the insertion portion 42 of the inner tube 40 into the outer tube 30, the exposed portion 31 of the outer tube 30 is positioned on the side close to the ground surface G, and the exposed portion 41 of the inner tube 40 is on an extension line of the exposed portion 31. Is located.

<6> Inserting internal reinforcing material (FIG. 8C (C))
After the internal reinforcing member 50 is inserted into the inner intubation tube 40 through the upper opening and hangs down, a fixing tool 17 such as a through bolt is inserted between the upper portion of the inner reinforcing member 51 and the upper portion of the inner intubation tube 40.
Further, the internal reinforcing member 50 is accommodated in the inner tube 40 in advance, and the fixture 17 is inserted and connected so that the integrally connected inner tube 40 and the internal reinforcing member 50 are suspended in the common outer tube 30. It may be.

<7> Rotation regulation of both pipes (Figs. 4, 7 and 8C (D))
The through holes 33 and 46 provided in the upper peripheral surface of the exposed portion 31 of the outer tube 30 and the lower peripheral surface of the stopper shade 45 of the inner intubation 40 are aligned with the through holes 51a of the internal reinforcing member 50, and these through holes are aligned. A coupling tool 34 such as a bolt is inserted through the holes 33, 46, 51 a to restrain the rotation of both the tubes 30, 40.

<8> Filling with consolidated material (Fig. 2)
The cement-based solidification material 15 is filled into the outer tube 30, the inner tube 40, and the internal reinforcement member 50 through the upper opening of the inner tube 40.
As the consolidation material 15, for example, known materials such as cement milk and mortar can be used.
Finally, the cap 44 is attached to the opening at the upper end of the inner intubation 40, and the construction of the column 10 is completed.
The hardened consolidated material 15 firmly integrates between the outer tube 30 and the inner intubation 40 and between the inner tube 40 and the inner reinforcing material 50.

<9> Attaching the protective net (Fig. 1)
A protective net 20 is placed horizontally between each support column 10 constructed in the process described above.
In the case of this example, the end portion of each horizontal rope 21 is gripped by the friction sliding type holding means 13 of the terminal column 10a, and then inserted into the mooring type holding unit 14 of the adjacent intermediate column 10b. Stretch horizontally. The spacing member 11 is attached between the horizontal ropes 21 as necessary.
When the horizontal work of the plurality of horizontal ropes 21 is completed, the net 22 is attached and the installation of the protective net 20 is completed.
The protective fence post 10 according to the present invention can provide a protective fence that can cope with large-scale falling rocks, avalanches, collapsed earth and the like.

<10> Shock-absorbing action of protective fence (Figs. 1 and 2)
When avalanches, collapsed sediment, etc. from the mountain side collide with the protective net 20 of the protective fence, the protective net 20 is deflected and deformed to the valley side, and the impact load is transmitted to the post 10, and finally the strength of the post 10 is reduced. Support the impact load.
When falling rocks from the mountain side collide with the protective net 20, tension acts on the lateral rope 21 via the net 22. When this tension exceeds the gripping frictional force of the frictional sliding type holding means 13 of the terminal column 10a, the lateral rope 21 slides with respect to the holding means 13, and the impact load is attenuated by the sliding resistance at this time. .

[Characteristics of props]
Next, the characteristics of the column 10 will be described.

<1> About the bending strength of the support (Figure 2)
In general, during受撃the safety barrier to generate the greatest bending moment on the ground range L ₁ toward the valley side of the predetermined near the surface G of the column 10 (height from the ground surface G of about 0.5 to 2 m) , the ground range L ₂ of a predetermined near the surface G of the column 10 (approximately 2/3 of the depth of the strut root entry depth from the ground surface G) to produce the greatest bending moment toward the mountain side.
As described above, the column 10 is a hybrid composite structure composed of three members of steel (the outer tube 30 and the inner tube 40), the consolidated material 15, and the consolidated earth (consolidated soil mass G ₁ ), and generates the largest bending moment. A double tube structure of the outer tube 30 and the inner tube 40 filled with the consolidation material 15 over the stress concentration range L ₃ including the ground range L ₁ and the underground range L ₂ of the support column 10, An internal reinforcing material 50 is embedded in the center to increase the bending strength.
Therefore, it is possible to most strongly reinforce the stress concentration range L ₃ strut 10 according to the magnitude of the bending moment.

The predetermined ground range L ₁ close to the ground surface G of the support column 10 is substantially equal to the height of the exposed portion 31 of the outer tube 30. Further, the predetermined underground range L ₂ near the surface G of the strut 10 is substantially equal to the relationship between the total length of the insertion portion 42 of the inner cannula 40.
Further, the stress concentration range L ₃ of the support column 10 is substantially equal to the total length of the internal reinforcing member 50.

<2> About the strength of the lower part of the support (Figure 2)
In general, a large bending moment acts in the range from the ground surface G to 2/3 of the support penetration depth, but below that (range of about 1/3 of the support penetration depth) Does not work.
The present invention focuses on this point, the capture space 35 formed in the range of about 1/3 of the strut root entry depth without filling the Katayuizai 15, so as to accommodate the compacted soil mass G ₁ Thus, the compacted soil mass G ₁ is used as an alternative material for the consolidated material 15.
Katayuizai 15 and compacted clods G ₁ is is a combination of dissimilar materials, caking material 15 and compacted clods G ₁ By restraining is structures structurally integral with common outer tube 30.
Therefore, without reducing the strength of the entire strut 10, which is economical it can be omitted volume fraction of consolidation material 15 of compacted soil mass G _1.

<3> About the boundary position between the upper end of the outer tube and the inner tube (FIG. 2)
FIG. 10A shows a model diagram at the time of impact in a protective fence provided with a conventional assembling-type column 60 and a protective net 70.
In the conventional support 60, since the connection position of the upper and lower built-up pillars 61 and the ground pillars 62 is very close to the ground surface G, the connection part 63 of the support 60 is weak in strength. Kenkomi pillar 61 that built up in the ground did not function at all as a strength member of the terrestrial range L ₁ which is a large bending moment is generated.

On the other hand, in the assembly-type support column 10 of the present invention, the upper exposed portion 31 of the outer tube 30 is protruded high from the ground surface G so that the upper end of the outer tube 30, the inner tube 40, and the boundary portion are within the stress concentration range L ₃ . Was not located.
Accordingly, the stress concentration range L ₃ struts 10 no longer strength weakness, it is possible to function the outer tube 30 as a reinforcing member located further stress concentration range L _3.

For example, in the design of a standby type protective fence, when the fallen object is collapsed sediment F, the collision height of the collapsed sediment F is defined as 1 m.
Since the height from the ground surface G of the exposed portion 31 of the outer pipe 30 is within the range of the collision height H of the collapsible earth and sand F, the assembling-type strut 10 projects from the collapsible earth and sand F, particularly The strength of the exposed portion 31 of the outer tube 30 can be maximally utilized to counter an impact load (impact force).

<4> Reason why the protective net is attached to the exposed portion of the outer tube Referring to FIG. 10A, the horizontal ropes 71 and 72 attached to the upper side and the lower side of the protective net 70 are arranged above the ground column body 62. A guard fence with a structure that is supported at two locations at the bottom is known.
In this conventional protective fence, the impact force acting on the protective net 70 is locally transmitted to the upper and lower parts of the ground pillar 62, and a large bending moment acts on the ground pillar 62 toward the valley side.

FIG. 10 (B) shows a model diagram at the time of impact in the guard fence provided with the assembly-type support column 10 and the guard net 20 of the present invention.
The protective fence of this example has a structure in which the protective net 20 is attached across the range of the exposed portion 31 of the outer tube 30 and the exposed portion 41 of the inner tube 40 that protrude from the ground surface G.
Specifically, a plurality of horizontal ropes 21 laid across the lower part of the protective net 20 are attached to a plurality of locations of the exposed portion 31 of the outer tube 30, and the impact load can be distributed and transmitted to the entire exposed portion 31 of the outer tube 30. It has a structure.
Therefore, since the impact force acting on the protective net 20 can be supported by distributing the impact load across the exposed portions 31 and 41 of both the tubes 30 and 40, the exposed portions 31 and 41 of the both tubes 30 and 40 protruding to the ground. The bending moment that works is reduced.

<5> About the rotation prevention effect of the outer tube and the inner tube (FIG. 7)
An annular consolidated material 15 a filled between the outer peripheral surfaces of the outer tube 30 and the inner tube 40 indirectly restrains the rotation of both the tubes 30 and 40.
Furthermore, since the connecting tool 34 inserted through the outer tube 30 and the inner tube 40 directly restrains the rotation of the tubes 30, 40, the effect of preventing the rotation of the inner tube 40 with respect to the outer tube 30 is remarkably increased. ing.
Therefore, when the horizontal rope 21 is stretched or when an impact is applied to the protective fence, the rotation of the inner intubation 40 can be reliably prevented.

<6> Water stop action by stopper shade (Figs. 4 and 7)
In the column 10, an annular stopper shade 45, which is a restricting means for restricting the insertion position of the inner tube 40 with respect to the outer tube 30, also has a water stop function.
Therefore, when the lower surface of the stopper shade 45 comes into contact with the upper end of the outer tube 30, the stopper shade 45 blocks the upper surface of the annular consolidated material 15a filled between the peripheral surfaces of both tubes 30 and 40, and rainwater or the like. Prevent flooding.
Therefore, it is possible to avoid the corrosion of the support column 10 caused by the flooding, the freezing destruction of the annular consolidated material 15a, and the corrosion of the pipe.

<7> Quality of consolidated material after filling (FIG. 8C (D))
Since the consolidated material 15 can be filled into the support column 10 from a position away from the ground surface G, earth and sand are mixed into the consolidated material 15 as compared with the case of filling from the position of the ground surface G or a position very close to the ground surface G. Thus, the consolidated material 15 can be filled in a high quality state.

<8> Appearance of the connecting part of the outer tube and the inner tube (FIG. 2)
As described above, the support column 10 of the present invention integrates both the outer tube 30 and the inner tube 40 with the solidified material 15, and an annular flange is provided at the connecting end of the column body as in the conventional support column. There is no need to form or fasten multiple bolts and nuts to connect the annular flanges.
Therefore, not only the connection cost of the support | pillar 10 can be reduced, but it also looks good because there are no unnatural protrusions.

[Example 2]
Other embodiments will be described below. In the description, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

<1> Column of this Example FIG. 11 shows another column 10 formed by integrally attaching a plate-like external reinforcing material 55 to the outer peripheral surface of the outer tube 30 and reinforcing it.
In this example, a mode in which a pair of external reinforcing materials 55 and 5 are continuously fixed to the outer peripheral surfaces of the outer tube 30 on the tension side and the compression side over substantially the entire length of the outer tube 30 will be described.

<2> External Reinforcement Material The external reinforcement material 55 is a reinforcement material obtained by bending a strip-shaped steel plate in accordance with the curvature of the outer tube 30 and is fixed to the outer peripheral surface of the outer tube 30 by welding or the like.
It is only necessary that the external reinforcing members 55 and 55 are fixed to the outer peripheral surface of the outer tube 30 over the stress concentration range of the column 10 in which the largest bending moment is generated.

<3> Effect of the present embodiment As shown in FIG. 11 (B), in the present embodiment, the internal structure of the outer tube 30 and the inner tube 40 filled with the consolidated material 15 is reduced. Since the reinforcement member 50 and the external reinforcement members 55 and 55 can be reinforced in cooperation, the bending strength of the column 10 can be increased without increasing the diameter of the column 10.
Furthermore, since it is not necessary to increase the diameter of the support column 10, it is not necessary to increase the depth of the support column 10, so that it can be economically constructed.

[Example 3]
In the above embodiment, the case of the assembly type support column 10 in which a part of the outer tube 30 and the inner tube 40 is superposed has been described. However, a single continuous tube (steel tube) may be used.
The single pipe is a steel pipe having both ends opened, and the post 10 is configured by accommodating the internal reinforcing material 50 described above inside the single pipe post 10. If necessary, external reinforcing members 55 are provided on the outer peripheral surface of the single pipe.

G ··· Ground surface G ₁ ··· Consolidated block L ₃ ··· Stress concentration range of column 10 ··· Assembly column 10a ··· Terminal column 10b ··· Intermediate strut 13 Friction sliding type holding means 14 Mooring type holding means 15 Solidified material 20 Protective net 21 Horizontal rope 22 ... Net 30 ... Exterior pipe 31 ... Exposed part 32 of the external pipe ... Established part 34 of the external pipe ... Connector (Pipe Rotation prevention means)
40 .. Intubation 41... Exposed portion 42... Insertion portion 45... Stopper shade 50... Internal reinforcement 51. ... Reinforcing core 52 ... Inner reinforcing plate 53 ... Outer reinforcing plate 55 ... External reinforcing material

Claims (10)

A method for erecting a protective fence post in which a plurality of pipes are assembled and assembled after being assembled by placing a built-in support post into the ground and filling it with a solidified material. Because
An exterior pipe having an exposed portion projecting over a predetermined ground range upward from the ground surface, and a built-in portion built in the ground,
An assembling-type column comprising an exposed portion projecting to the ground surface and an inner tube having an insertion portion to be inserted into the outer tube;
Using a compacting jig that can be struck and inserted into the support,
Strike the compacting jig and install the built-in portion of the outer tube together with the compacting jig into the ground,
Strike the earth and sand taken in the outer tube with the compacting jig to form a compacted earth lump in the lower part of the outer tube,
Insert the insertion part of the inner intubation into the outer tube closed with the compacted soil mass,
Filling the entire area of the inner tube and the outer tube through the inner tube, and filling the consolidated material,
The compacted soil mass and the consolidated material are constrained integrally through the outer tube,
How to set up a support fence post. Before filling the consolidated material, a connecting tool is inserted between the exposed portion of the outer tube and the insertion portion of the inner tube, and the outer tube and the inner tube are connected to be non-rotatable through the connector. The method for erecting a support fence post according to claim 1 . A protective fence post that is constructed by placing a built-in support post that is assembled by superimposing a part of a plurality of pipes into the ground, and then standing up by filling the support with a solidified material,
An exterior pipe having an exposed portion projecting over a predetermined ground range upward from the ground surface, and a built-in portion built in the ground,
An intubation tube having an exposed portion protruding to the ground surface, and an insertion portion to be inserted into the outer tube;
A compaction jig that can be struck and inserted into the intubation tube;
And compaction clod which was compacted in the sediment before Kigaiso pipe the compaction fixture,
The inner tube through the inner tube and a consolidated material filled in the entire interior of the outer tube,
The outer tube is characterized by constraining and integrating the compacted soil mass and the consolidated material,
Guard post. The inserted through the connector during insertion portion of the exposed portion and the inner intubation of the exterior tube, characterized by being non-rotatably coupled to the inner cannula and the outer tube through the coupling, according to claim 3 Guard post. The assembly-type support column includes a restriction means for an insertion position of an intubation tube, and the restriction means is a stopper shade that has an annular shape fixed to a boundary portion between an exposed portion and an insertion portion of the intubation tube. Item 5. A protective fence support according to item 3 or 4 . Characterized in that the outer tube plurality of holding means for holding a plurality of horizontal ropes multiple stages arranged along the entire length of the exposed portion of the inner intubation and exposed portions of are provided, of claims 3 to 5 The protective fence post according to any one of the above. 7. The protective fence according to claim 6 , wherein an annular bracket is attached to the exposed portion of the outer tube and the exposed portion of the inner tube by welding, and holding means is provided on a part of the annular bracket. Prop. Wherein further comprising an inner reinforcement stress concentration range equal to the length of the strut, characterized in that the inner stiffener reinforced by positioning inside the intubation, any one of claims 3 to 5 The protective fence support described in the paragraph. Further comprising an external reinforcement of the same length as the stress concentration range of said strut, characterized by being reinforced by integrally fixed to the outer reinforcing member on the outer peripheral surface of the outer tube, claims 3 to 5, or The protective fence support according to any one of 8 . The support fence post according to claim 3 , wherein an overall length of the exposed portion of the outer tube is 0.5 to 2 m .

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