JP2019094647A - Road's guard fence and steel foundation member of road's guard fence, and their construction method - Google Patents

Abstract

To provide, by materializing a steel foundation member of a road's guard fence capable of solving the issues regarding conventional foundations at one time, a road's guard fence and a steel foundation member for the road's guard fence together with their construction method, which are remarkably superior in handling ability, workability, economical efficiency and global environment performance.SOLUTION: A steel foundation member 10 has a hollow part for receiving a pillar, is formed like a wall that is long in the road's extension direction, and is constituted to be capable of being buried in the ground with driving machine. The aforesaid steel foundation member 10 is composed, for example, by joining a hollow square steel pipe 1 or a U-shape section steel and a wall-shape steel material (e.g. steel plate) 2 that is long in the road's extension direction, all said materials being arranged roughly to be the same height. A hat-sectional steel (e.g. steel sheet pile) 3 is joined to the aforesaid wall-shape steel material 2, surrounding the aforesaid hollow square steel pipe 1 or the U-shape section steel. A cover material (e.g. equal angle steel) 4 is provided at the lower end of the aforesaid hollow part.SELECTED DRAWING: Figure 1

Description

  The present invention belongs to the technical field of a base member that supports columns of a road protection fence.

The guard fence for the road is appropriately selected by applying a guard pipe, a guard rail, a guard cable, etc. according to the place and purpose (role) to install, but the pillar which is the main component common to these is the ground There are many types that are fixedly installed on a concrete block foundation embedded in the inside.
Concretely, the construction method of the road protection fence at the time of using the precast concrete block foundation of width 400 x 400 mm, height 700 mm, weight 240 kg well-known as the present standard goods for the concrete block foundation (construction procedure) An example is described below.

(1) First, remove the asphalt pavement around the erected portion of the support with an asphalt cutter or an electric hammer.
(2) Next, the roadbed and the roadbed are excavated by a backhoe to form a square hole capable of accommodating the concrete block foundation.
(3) Next, the crushed stone is spread on the bottom of the hole with a scoop or a damper.
(4) Next, the concrete block foundation is dropped into the hole by the backhoe (heavy machine) and set horizontally on the crushed stone.
(5) Next, the excavated soil is backfilled by the necessary amount with a scoop, a rammer or a plate compactor, and the pavement is restored.
(6) Next, build a pillar in the existing through-hole of the concrete block foundation, pour solidifying material such as mortar into a gap formed by the pillar and the through-hole as needed, and erect the pillar .
(7) The support work according to (1) to (6) is performed for each predetermined part in the road extension direction, and a fence member such as a pipe material, a cable material, or a beam material is installed between the support posts. Build a road protection fence such as a guard pipe, a guard rail, or a guard cable.

By the way, in recent years, a car accident on a living road (a road whose width is mainly used for daily life of local residents is narrow) until it comes out to a main road such as a main road, especially a car accident where a car contacts or collides with a pedestrian It is frequent and has become an issue to be solved.
The most direct means of preventing the vehicle accident is to set up a road protection fence (hereinafter referred to as life road fence as appropriate) at the walking road boundary of the living road, and to be a pedestrian. It is to physically separate the traffic of each vehicle, but due to the problems related to the foundations listed in the following (a) to (d), the installation of the fences for life roads is not widespread as expected In fact, it is often the case that it is often stopped by visual separation such as painting in green to make the pedestrian road stand out.
(A) Since the precast concrete block foundation itself has a large weight, it requires heavy machinery and handling is difficult.
(B) In addition, since the volume of the concrete block foundation itself is bulky, there is a risk of interfering with existing curbs and so-called underground objects such as pipelines and the like (for example, sewage pipes and gas pipes).
(C) The work according to the above (1) to (7) takes time and cost, which is uneconomical. Among them, (2) digging work and (5) backfilling work took time.
(D) The excavated soil of the same volume as the concrete block foundation can not be backfilled, so it had to be disposed of.

  However, although a means of casting and manufacturing the concrete block foundation on site can be considered, in this case, although the problem of (a) among the problems of (a) to (d) is solved, b) The problems in (d) are not solved yet, and there is a problem that new problems such as the need to secure a curing period occur in addition to the work of assembling the formwork and the pouring operation of concrete. The

For example, as an invention relating to the foundation of a road protection fence in Patent Document 1, as shown in FIG. 1 of the same document 1, a hollow main body 10 formed in a drilled hole and having an open upper surface is provided. An upper holding means 20 arranged near the upper end of the main body 10 and holding an intermediate portion of the column 9 to be installed, and a lower plate 13 or the lower plate 13 of the main body 10, the lower end of the column 9 And lower holding means 30 for holding
With the columns 9 held by the upper holding means 20 and the lower holding means 30, all or part of the excavated soil excavated when forming the excavated hole is backfilled in the main body 10 And a foundation for a support characterized in that the support base is disclosed (see claim 1 and the like).

JP, 2010-65496, A

  According to the foundation for struts according to the Patent Document 1, most of excavated soil can be backfilled in the main body 10, so among the problems of (a) to (d), the discarding according to (d) The issue of disposal can be resolved. However, the remaining problems of (a) handling, (b) interference risk, and (c) workability and economy can not be solved.

  The present invention has been made in view of the problems of the background art described above, and the purpose thereof is a protective fence for a road which can solve each of the problems listed in (a) to (d) at one time. By providing a foundation member for road guard fences and road guard fences that are extremely excellent in handling, workability, economy, and global environment by realizing a steel foundation member of is there.

As means for solving the above-mentioned problems, the steel base member of the road guard fence according to the invention described in claim 1 is a steel base member supporting the support pillar of the road guard fence,
The steel base member has a hollow portion for receiving the support column, and is formed in a wall shape elongated in the road extension direction, and can be buried in the ground by a driving machine.

  The invention according to claim 2 is the steel base member of the road protection fence according to claim 1, wherein the steel base member is a hollow square steel pipe or a substantially U-shaped cross-section steel whose heights are substantially the same. It is characterized by joining so that the said hollow part may be formed with wall-shaped steel materials long in the road extension direction.

  In the invention according to claim 3, in the steel base member of the road protection fence according to claim 2, the cross section hat-shaped steel forms the wall-like shape so as to surround the hollow square steel pipe or the substantially U-shaped cross section steel. It is characterized in that it is joined to a steel material.

  In the invention described in claim 4, in the steel base member of the road protection fence described in any one of claims 1 to 3, a lid member is provided at the lower end portion of the hollow portion. It is characterized by

  The invention described in claim 5 is characterized in that, in the steel base member of the road protection fence described in claim 3, the section steel of the hat-shaped cross section is a steel sheet pile.

  The invention as set forth in claim 6 is the steel base member of the road protection fence as set forth in claim 2 or 3, wherein the wall-like steel material is a flat steel plate, a ribbed flat steel plate, a corrugated steel, or a ribbed corrugated steel It is characterized by being.

In the invention according to claim 7, in the steel base member of the road protection fence according to claim 1, the steel base member is a combination of a plurality of H-shaped steel, hollow square steel pipe, or any one or more of them. It is characterized in that it is formed like a hollow structure by bonding.
According to an eighth aspect of the present invention, in the steel base member of the road protection fence according to the seventh aspect, the steel base members integrally arrange a plurality of hollow rectangular steel pipes in the road extension direction. It is characterized by becoming.

  In the invention described in claim 9, in the steel base member of the road protection fence described in any one of 1 to 8, a projecting portion which protrudes substantially horizontally to the sidewalk side is integrally provided. It is characterized by

  The road protection fence according to the invention described in claim 10 comprises the steel base member according to any one of claims 1 to 9, a column erected in the hollow portion of the steel base member, and It is characterized in that it is made of a fence member such as a pipe material, a beam material, or a cable material installed between erected columns.

The construction method of a road protection fence according to the invention as set forth in claim 11 is the above-described steel base after the steel base member according to any one of the above-mentioned 1 to 9 is driven into the ground by a driving machine. A column is erected in the hollow portion of the member, and a fence member such as a pipe material, a beam material, or a cable material is bridged between the erected columns.
The invention according to claim 12 is the construction method of a road protection fence according to claim 11, wherein the base portion placed on the top end of the steel base member and the downward projecting portion which can be inserted into the hollow portion The inserted steel jig is set by inserting the downward projecting portion into the hollow portion before the steel base member is driven into the ground by a driving machine, and the steel base member is driven. It is characterized in that it is removed after being driven into the ground by aircraft.

According to the steel base member and the road protection fence of the road protection fence and the construction method therefor according to the present invention, the following effects can be obtained.
(A) The steel base member according to the present invention, which corresponds to the precast concrete block base according to the prior art described above, can reduce the weight to about 1/6 to 1/5, so that workers do not need heavy machinery It became possible to handle. Therefore, it is very excellent in handleability.
(B) Since the steel base member can be implemented in a slim form in comparison with the concrete block base, the existing curb, a so-called underground object such as a pipe girder, etc. (for example, a sewage pipe or gas pipe) Struts can be erected avoiding the risk of interference, and as a result a road fence can be constructed.
(C) The construction work process of the road protection fence (life road fence) can be largely omitted compared to the work process according to the prior art, and the work time can be substantially shortened to about 1/7. It is very excellent in sex and economy.
(D) Since there is no process for excavating the ground, there is almost no excavated soil to be disposed of, which is extremely excellent in global environment.
If you give up, it is possible to realize a road protection fence that is extremely excellent in handling, interference risk avoidance, construction, economy, and global environment, thus contributing reliably to the spread of life road fences, which was conventionally difficult. it can.

A is a perspective view showing a steel base member of a road protection fence according to a first embodiment, B is a plan view of the same, and C is a front view of the same. A is a perspective view showing a steel base member of a road protection fence according to a second embodiment, B is a plan view of the same, and C is a front view of the same. A is a perspective view showing a steel base member of a road protection fence according to a second embodiment, B is a plan view of the same, and C is a front view of the same. A is a perspective view showing a steel base member of a road protection fence according to a second embodiment, B is a plan view of the same, and C is a front view of the same. A is a perspective view showing a steel base member of a road protection fence according to a third embodiment, B is a plan view of the same, and C is a front view of the same. A is a perspective view showing a variation of a steel base member of a road protection fence according to a third embodiment, B is a plan view of the same, and C is a front view of the same. A is a perspective view showing a steel base member of a road protection fence according to a fourth embodiment, B is a plan view of the same, and C is a front view of the same. A is a perspective view showing a steel base member of a road protection fence according to a fifth embodiment, B is a plan view of the same, and C is a front view of the same. A is a perspective view showing a steel base member of a road protection fence according to a sixth embodiment, B is a plan view of the same, and C is a front view of the same. A is a perspective view showing a variation of a steel base member of a road protection fence according to a sixth embodiment. A is a front view showing a steel jig according to the present invention, B is a front view showing a state in which a steel jig is set on a steel base member, and C is a plan view thereof .

  Next, an example of the steel base member of the road protection fence and the road protection fence according to the present invention and the construction method thereof will be described based on the drawings.

1A to 1C show a steel base member 10 of a road protection fence according to a first embodiment.
The steel base member 10 is a steel base member 10 for supporting a support of a road protection fence, has a hollow portion for receiving the support, and is formed in a wall shape elongated in the road extending direction, and is driven It is implemented in a configuration that can be buried in the ground by aircraft.
Specifically, the steel base member 10 according to the first embodiment is the hollow square steel pipe 1 whose height is substantially the same, and the wall-like steel material (flat steel plate in the illustrated example) 2 long in the road extension direction. It is joined so as to form a hollow portion, and further, a section steel (steel sheet pile in the illustrated example) 3 having a hat-shaped cross section is joined to the wall-like steel (flat steel plate) 2 so as to surround the hollow square steel pipe 1.
Here, in the present specification, the “embedded configuration” refers to the tip resistance force and the circumferential surface friction force received from the ground, without being displaced to the set driving position, at the time of driving by the driving machine. On the other hand, it is defined as a structure (structure) having strength and rigidity that does not cause deformation or damage that may affect the horizontal supporting force of the base when receiving an external force in the horizontal direction.
Further, in the present specification, the "flat steel plate" means a flat thick steel plate (thick plate) or a flat steel plate such as flat steel.
In addition, although the said driving machine is a support | pillar driving machine (air striker) used in order to drive the support | pillar of the road protection fence on the ground, it is suitable also in the press-in machine used in order to press a steel sheet pile to the ground. It can be implemented. Therefore, in the present specification, the above-mentioned "drilling machine" is defined as including a press-fitting machine.

As an example, the hollow rectangular steel pipe 1 is implemented with dimensions of 125 × 125 mm in length and width, 4.5 mm in thickness, and 434 mm in height. In this embodiment, welding is performed so that a mountain steel (angle) 4 having a height of 66 mm (90 by 90 mm) and a thickness of 6 mm protrudes downward at the lower end of the hollow rectangular steel pipe 1 as a lid member. It is integrally provided by the joining means.
The flat steel plate 2 is, for example, implemented with a width of 700 to 800 mm, a thickness of 6 mm, and a height of 500 mm.
A light steel sheet pile 3 referred to as an LSP-5 type is used in the present embodiment as the section steel 3 of the hat-shaped cross section. The lightweight steel sheet pile 3 has a total width of 535 mm, a mountain height of 162 mm, a flat portion (flange portion) of 260 mm, and a plate thickness of 5 mm, viewed from the planar direction (see FIG. 1B) The height is 500 mm also in the form which cut | disconnected the latching piece which becomes a hindrance of a welding operation among pieces, a to-be-latched piece). Naturally, in the case of carrying out with the cross section hat-shaped section steel 3 instead of the steel sheet pile 3, the cutting operation is useless.
Of course, the dimensions of each of the members 1, 2 and 3 (the steel base member 10) are not limited to the above, and the design can be changed appropriately according to the (cross section) size of the column used and the required impact resistance etc. is there.

Although the joining means of each said member 1, 2, 3 is implemented by the welding joining means in a present Example, it can also implement by a bolt joining means.
By the way, in the present embodiment, the heights of the respective members 1, 2 and 3 are equalized to the above 500 mm, and the central portion of the flat steel plate 2 and the central portion of the hollow rectangular steel pipe 1 are aligned. With the side surfaces of the hollow rectangular steel pipe 1 in contact with each other, the upper and lower heights are aligned and welded. And position alignment with each central part of above-mentioned and a central part of a plane part of the steel sheet pile 3 is carried out, height of the upper and lower sides of the flat steel plate 2 and the steel sheet pile 3 is equalized, and a mutual contact part is welded. By joining, a steel base member 10 having a predetermined strength and rigidity is manufactured. Incidentally, the weight of the steel base member 10 according to the present embodiment is about 40 to 50 kg.

As described above, the significance of realizing the steel base member 10 by making the heights of the respective members 1 (including the height of the angle steel 4), 2 and 3 approximately equal, is that the manufacturability, the handling property, and the transportability It is because it is rational and excellent in terms of handleability and workability.
The significance of welding the hollow rectangular steel pipe 1 to the flat steel plate 2 side instead of the steel sheet pile 3 side is that the flat steel plate 2 integrated with the steel pipe 1 against the collision (collision speed, collision angle, degree of impact) of the vehicle. It is for realizing the composition which can resist effectively by the earth pressure which contacts.
In the present embodiment, a gap of 37 mm (the 162 mm-the 125 mm) is formed between the hollow rectangular steel pipe 1 and the flange portion of the steel sheet pile 3, but the gap can be implemented similarly without particular .
The significance of carrying out the height dimension of the steel base member 10 at 500 mm is that if it exceeds 500 mm, the risk of interference with underground burials (such as sewer pipes and gas pipes) increases. .

Furthermore, the significance of providing the angle steel 4 at the lower end of the hollow rectangular steel pipe 1 is that when the whole steel base member 10 is driven into the ground by the driving machine, soil (structure of base and roadbed) in the steel pipe 1 Etc.) to prevent it from entering. As a result, in the steel pipe 1, the support 1 is provided in a proper manner.
However, in the case of the present embodiment, a substantially triangular gap S (see FIG. 1C) is formed through the axial direction of the angle steel 4 between the hollow rectangular steel pipe 1 and the (equal side) angle steel 4 substantially. Although one side is closed by the flat steel plate 2 and the other is small as 37 mm in the planar gap with the steel sheet pile 3, soil (structure of roadbed, roadbed, etc.) in the steel pipe 1 There is almost no entry, and good standing work of the support 1 can be realized.
Incidentally, the triangular gap S may be closed by a plate, or the angle steel 4 may be attached in a direction in which the axis is parallel to the flat steel plate 2.

An example of a construction method of a road fence (railway road fence) using the steel base member 10 of the above-mentioned composition is explained below.
First, the steel base member 10 is positioned at a predetermined position. Specifically, the axial center position of the hollow rectangular steel pipe 1 of the steel base member 10 is made to substantially coincide with the axial center position of the erected column, and the hat-shaped steel sheet (steel sheet pile) 3 is a roadway. The flat steel plate 2 is placed along the road extending direction so as to be arranged on the side. Then, the steel base member 10 is gradually driven from above by the driving machine and buried in the ground by a pressing force (corresponding to (4) of the conventional method).
Since the steel base member 10 has required strength and rigidity, it can be smoothly buried in the ground while maintaining the vertical posture. Further, since the angle steel 4 provided at the lower end portion of the hollow rectangular steel pipe 1 prevents the soil (pathway, construction of the roadbed, etc.) from entering into the inside, the hollow rectangular even after being buried in the ground The inside of the steel pipe 1 can be secured in a hollow state. Furthermore, in this case, the ground is compacted, and the resistance in the horizontal direction of the foundation also increases.
Next, build a pillar in the hollow square steel pipe 1 of the steel base member 10 buried in the ground, pour a solidifying material such as mortar into the gap formed by the pillar and the hollow square steel pipe 1 as necessary. The column is erected (corresponding to (6) of the conventional method).
Next, the pillar erecting work is performed for each predetermined portion in the road extension direction, and fence members such as a pipe material, a cable material, or a beam material are installed between the erected pillars, thereby providing a guard pipe A road guard fence (fare road fence) such as a guardrail or a guard cable is constructed (corresponding to (7) in the conventional construction method).

According to the construction method of the road protection fence using the steel base member 10 described above, the following effects can be obtained.
The steel base member 10 (about 40 to 50 kg) according to the present invention corresponding to the precast concrete block foundation (about 240 kg) according to the above-mentioned prior art can reduce the weight to about 1/6 to 1/5. So it became possible for workers to handle without heavy equipment. Therefore, it is very excellent in handleability. In addition, since the steel base member 10 can be made of steel, the strength and rigidity are high, and damage and breakage do not easily occur.
The steel base member 10 can be slimmed down to a thin wall with a smaller thickness (width) compared to the concrete block base, and can be implemented in a compact form with a height of 500 mm. The support posts can be erected while avoiding the risk of interference with so-called buried objects in pipes and the like (e.g., sewage pipes and gas pipes), and as a result, a road protection fence (life road fence) can be constructed.
It is possible to largely omit the process of constructing the road protection fence (fence for life roads). Specifically, as described above, among the conventional methods (1) to (7), the methods (1), (2), (3) and (5) can be omitted. In addition, according to the experiment conducted by the present applicant, the standing work time per one column can be greatly reduced from about 75 minutes to about 10 minutes. Therefore, it is very excellent in construction and economy.
Since there is no process for excavating the ground, there is almost no excavated soil to be disposed of, and thus it is extremely excellent in global environment.

In addition, although the process of said (1) which removes asphalt pavement is abbreviate | omitted in a present Example, after removing asphalt pavement, you may perform the process in which the said steel base members 10 are driven.
Further, in the present embodiment, when the steel base member 10 is driven by the driving machine, the base portion 11a placed on the top end of the steel base member 10 and the hollow rectangular steel pipe 1 as shown in FIG. It carries out using the steel jig 11 provided with the downward protrusion part 11b which can be inserted inside.
The steel jig 11 plays the role of a shock absorbing material to prevent the damage to the steel base member 10, and distributes the pressing force by the driving machine in a well-balanced manner throughout the steel base member 10. It plays a role of driving 10 into the ground. By the way, the steel jig 11 according to the present embodiment has a hollow steel pipe vertically penetrated in a substantially central portion of a plate having a size enough to planarly cover the steel base member 10 by welding and joining means It is integrally formed.
Then, the steel jig 11 is set to the steel base member 10 by inserting the projecting portion 11b below the plate (base portion 11a) in the hollow steel pipe into the hollow rectangular steel pipe 1, By mounting the projecting portion above the plate to the lower end portion of the driving unit of the driving machine, the driving operation by the driving machine is performed.
Then, after the steel base member 10 has been driven into the ground by a driving machine, the steel jig 11 is removed, and the erection work of the pillars is started.
Incidentally, the embodiment described in the paragraph [0030] has the same technical idea as to each example described below.

2 to 4 show a steel base member 10 'of a road protection fence according to a second embodiment.
Compared with the steel base member 10 of the first embodiment, the steel base member 10 'of the second embodiment does not use the cross section hat-shaped section steel (steel sheet pile) 3 and the hollow rectangular steel pipe A flat steel plate (see FIG. 2) or a ribbed flat steel plate (see FIG. 3) having a thickness larger than that of FIG. The difference is that corrugated steel (see FIG. 4) or ribbed corrugated steel (not shown) is used.
That is, the steel base member 10 'of this embodiment 2 has substantially the same height (in the illustrated example, the same 500 mm as the embodiment 1), a substantially U-shaped cross section steel 6 and a wall-shaped steel 2 long in the road extension direction And so as to form the hollow portion.

  According to the road protection fence (life road fence) using the steel base member 10 'of this embodiment 2 and the construction method thereof, there is no section steel 3 of the hat-shaped cross section as compared with the embodiment 1 By using a thick flat steel plate, a ribbed flat steel plate, a corrugated steel, or a ribbed corrugated steel, it is possible to realize a steel base member 10 'having the required strength and rigidity. The same action and effect are exhibited (see the above paragraph [0029]). That is, since a road protection fence extremely excellent in handling property, interference risk avoidance property, construction property, economy, and global environment property can be realized, it can certainly contribute to the spread of life road fences which was conventionally difficult. .

5A to 5C show the steel base member 30 of the road protection fence according to the third embodiment.
The steel base member 30 is a steel base member 30 for supporting the columns of the road protection fence, has a hollow portion for receiving the columns, and is formed in a wall shape elongated in the road extension direction, and is driven It is implemented in a configuration that can be buried in the ground by aircraft. Specifically, the plurality of hollow rectangular steel pipes 1 are integrally arranged in parallel in the road extension direction.

The steel base member 30 according to the illustrated example is integrally formed by welding connecting means with the side surfaces of the five hollow rectangular steel pipes 1 and 1 'being in contact with each other.
The hollow hollow steel pipe 1 at the center is the same shape and size as the hollow rectangular steel pipe 1 of the first embodiment, and at the lower end portion, the angle steel 4 of the same shape and size as the angle steel 4 is integrated by welding connection means. The height dimension is likewise implemented at 500 mm.
The other hollow rectangular steel tubes 1 ′ are of the same shape and size as the hollow rectangular steel pipes 1 and are of the straight type having a height of 500 mm.
The weight of the steel base member 30 is about 35 to 40 kg.

According to the road protection fence (life road fence) using the steel base member 30 of the third embodiment and the construction method thereof, the same concept as the first embodiment is carried out. The same action and effect are exhibited (see the above paragraph [0029]). That is, since a road protection fence extremely excellent in handling property, interference risk avoidance property, construction property, economy, and global environment property can be realized, it can certainly contribute to the spread of life road fences which was conventionally difficult. .
Further, the steel base member 30 of the third embodiment is arranged symmetrically in the vertical and horizontal directions, has no directionality, and can smoothly (mechanically) perform the positioning operation to the erected column position. In comparison, it is further excellent in construction.
In addition, by implementing a part or all of the four hollow rectangular steel pipes 1 'in a supportable configuration in which the hollow rectangular steel pipe 1 of the central portion and the angle steel 4 are combined, the erected position of the support is made on site And can be easily changed, or a plurality of columns can be erected on one steel base member 30 to enable a flexible design.
In addition, although the example in which the angle steel 4 of the same shape and size as the angle steel 4 is provided only at the lower end portion of the hollow rectangular steel pipe 1 has been illustrated, Also, the angle steel 4 of the same shape and size as the angle steel 4 may be provided. In this case, the angle steel 4 provided also in the hollow rectangular steel pipe 1 ′ prevents the inflow of soil and the like around the steel base member 30, thereby preventing the soil and the like around the steel base member 30, You can expect a tightening effect.

In addition, although the steel base member 30 based on the present Example 3 is formed and implemented like a hollow structure of a harmonica, such a structure is not limited to FIG. 5, For example, as shown in FIG. This can be realized by appropriately combining and joining the H-shaped steel 7 and the hollow rectangular steel pipe 1. That is, in an embodiment such as the hollow structure of such harmonica, both or any one of the H-shaped steel 7 and the hollow rectangular steel pipe 1 are plural (in the illustrated example, four H-shaped steels 7 and the hollow rectangular steel pipe 1 1) By combining and joining, various variations can be realized and the same effects can be obtained.
In addition, although the example in which the angle steel 4 of the same shape and size as the angle steel 4 is provided only at the lower end portion of the hollow rectangular steel pipe 1 is illustrated, the hollow formed by all or a part of the H steel 7 At the lower end of the hollow (one hollow of the harmonica), an angle steel 4 of the same shape and size as the angle steel 4 may be provided. In this case, the angle steel 4 also provided in the hollow formed by the H-shaped steel 7 prevents the inflow of soil and the like around the steel base member 30, whereby the soil and the like around the steel base member 30 and the like are On the other hand, a tightening effect can be expected.

7A to 7C show the steel base member 40 of the road protection fence according to the fourth embodiment.
The steel base member 40 of the fourth embodiment is different in design from the steel base member 10 of the first embodiment in the following points.
The hollow square steel pipe 41 having a height dimension increased by 200 mm from 434 mm to 634 mm while keeping the cross sectional size of the hollow square steel pipe 1 as it is is 700 mm in total with the angle steel 4 as a whole.
The height of the flat steel plate 2 is increased by 200 mm from 500 mm to 700 mm, and the flat steel plate 42 whose width is narrowed from 700 to 800 to 460 mm is used.
A point using a steel sheet pile 43 in which the height dimension is increased from 434 mm to 634 mm by 200 mm while keeping the cross sectional size of the cross section hat shaped steel sheet (steel sheet pile) 3 as it is. In the steel sheet pile 43 according to the fourth embodiment, since the width of the flat steel plate 42 is narrowed, there is no need to cut the joint portion (the hooking piece).

According to the road protection fence (life road fence) using the steel base member 40 of the fourth embodiment and the construction method thereof, the dimensions of the components of the first embodiment are merely changed, so 5 kg Although the weight is increased, the same function and effect as the first embodiment can be obtained (see the above paragraph [0029]). That is, since a road protection fence extremely excellent in handling property, interference risk avoidance property, construction property, economy, and global environment property can be realized, it can certainly contribute to the spread of life road fences which was conventionally difficult. .
However, as for the effect of avoiding the interference risk, since the height of the steel base member 40 is extended from 500 mm to 700 mm according to the first to third embodiments, although the effect is inferior by that much, the concrete block Compared to the foundation, it can be said that the effect is very high because it is very slim.

8A to 8C show the steel base member 50 of the road protection fence according to the fifth embodiment.
The steel base member 50 of the fifth embodiment is different from the steel base member 10 of the first embodiment in the following points.
The point which is using CT type steel (CT-150x150x6.5x9) 5 500 mm in height instead of the said flat steel plate 2. FIG.
Along with this, there is no need to cut the joint portion (latching piece) of the cross section hat-shaped shaped steel (steel sheet pile) 3.

  According to the road protection fence (life road fence) using the steel base member 50 of the fifth embodiment and the construction method thereof, the concept is the same as that of the first embodiment, and the weight hardly changes. The same operation and effect as in the first embodiment can be obtained (see the paragraph [0029]). That is, since a road protection fence extremely excellent in handling property, interference risk avoidance property, construction property, economy, and global environment property can be realized, it can certainly contribute to the spread of life road fences which was conventionally difficult. . Furthermore, as compared with the first embodiment, there is also an advantage that the supporting force is increased by the increase in the surface friction between the web of the CT type steel 5 and the ground.

9A to 9C show the steel base member 20 of the road protection fence according to the sixth embodiment.
The steel base member 20 according to the sixth embodiment is different from the steel base member 10 according to the first embodiment in that a projecting portion 12b projecting substantially horizontally to the sidewalk is integrally provided. Concretely, in the example of illustration, it replaces with the flat steel plate 2 of the said Example 1, and the point which uses the cross-section inverted L-shaped steel plate 12 which consists of a vertical part 12a and a horizontal part 12b is different. Incidentally, the vertical portion 12a is implemented in the same size as the flat steel plate 2, and the projecting dimension of the horizontal portion 12b is approximately 20 to 30 cm.

According to the road protection fence (life road fence) using the steel base member 20 of the sixth embodiment and the construction method thereof, the concept is the same as that of the first embodiment, so the weight of about 5 kg is Although bulky, the same operation and effect as the first embodiment can be obtained (see the paragraph [0029]). That is, since a road protection fence extremely excellent in handling property, interference risk avoidance property, construction property, economy, and global environment property can be realized, it can certainly contribute to the spread of life road fences which was conventionally difficult. .
In addition to the effective resistance by the earth pressure of the flat steel plate 2 (vertical portion 12a) according to the first embodiment, the effect of the horizontal portion 12b of the cross-sectional inverted L-shaped steel plate 12 is a steel foundation at the time of a vehicle collision. Since the resistance to the rotation of the member 10 can also be enhanced, the strength and rigidity of the steel base member 20 can be further improved, or the size can be reduced.

  As in the case of the above-described steel base member 20, the means for integrally providing the projecting portion projecting substantially horizontally to the sidewalk can be realized not only by the illustrated example but also by various variations. For example, not a large-scale design change that replaces the cross-sectional inverted L-shaped steel plate 12 with the flat steel plate 2, an example is shown in FIG. 10, but the steel base members 10, 10 ′ according to FIGS. It can also be realized by welding and joining a plate or an angle 8 to the sidewalk side of the side surfaces of 30 and 40, and the same effect can be achieved (see the above paragraph [0042]).

Although the embodiments have been described above with reference to the drawings, the present invention is not limited to the illustrated examples, but includes the scope of design changes and variations of application which those skilled in the art usually perform without departing from the technical concept thereof. I mention that just in case.
For example, if the lower projecting portion 11b of the steel jig 11 according to FIG. 11 is formed into a solid bar-like shape or a hollow bar-like shape with a bottom lid as inscribed in the hollow rectangular steel pipe 1, Since soil (pathway, construction of roadbed, etc.) does not enter into the inside of the hollow rectangular steel pipe 1 (or approximately U-shaped steel in cross section) at the time of driving, there is no angle steel 4 (a downward convex lid). It can also be implemented.

1 Hollow square steel pipe 1 'Hollow square steel pipe 2 Wall-like steel (flat steel plate etc.)
3 Steel sheet pile (cross section hat shaped steel)
4 Angle steel (lid)
5 CT-shaped steel 6 Cross-sectionally U-shaped steel 7 H-shaped steel 8 angle 10 Steel base member 10 'Steel base member 11 Steel jig 11a Base part 11b Downward protruding part 12 Cross-sectional inverted L-shaped steel plate 12a Vertical part 12b Horizontal part 20 Steel base member 30 Steel base member 30 'Steel base member 40 Steel base member 41 Hollow square steel pipe 42 Flat steel plate 43 Steel sheet pile (hat-shaped section steel)
50 steel base member S clearance

Claims (12)

A steel base member that supports the columns of a road protection fence,
The above-mentioned steel base member is provided with a hollow portion for receiving the above-mentioned support, and is formed in a wall shape long in the road extension direction, and is characterized in that it can be buried in the ground by a driving machine. Steel base member for security fences.   The steel base member is characterized by being joined so as to form the hollow portion by a hollow square steel pipe or a substantially U-shaped cross-section steel having substantially the same height, and a wall-like steel material long in the road extension direction. The steel base member of the road protection fence according to claim 1.   The steel foundation of the road protection fence according to claim 2, characterized in that a section steel of hat-shaped cross section is joined to said wall-like steel material so as to surround said hollow square steel pipe or said substantially U-shaped cross section steel. Element.   The steel base member of the road protection fence according to any one of claims 1 to 3, wherein a lid is provided at a lower end portion of the hollow portion.   The steel base member of the road protection fence according to claim 3, wherein the cross section hat-shaped shaped steel is a steel sheet pile.   The steel base member of the road protection fence according to claim 2 or 3, wherein the wall-like steel material is a flat steel plate, a ribbed flat steel plate, a corrugated steel, or a ribbed corrugated steel.   The road according to claim 1, characterized in that the steel base member is formed like a hollow structure by joining a plurality of H-shaped steel and / or hollow rectangular steel pipes in combination. Steel base member for security fences.   The steel base member of the road protection fence according to claim 7, wherein the steel base member is formed by integrally arranging a plurality of hollow rectangular steel pipes in the road extension direction.   The steel base member of the road protection fence according to any one of claims 1 to 8, wherein a projecting portion projecting substantially horizontally to the sidewalk side is integrally provided. The steel base member according to any one of claims 1 to 9;
A post erected in the hollow portion of the steel base member;
A guard fence for a road, comprising: a fence member such as a pipe material, a beam material, or a cable material installed between the erected columns.   After the steel base member according to any one of claims 1 to 9 is driven into the ground by a driving machine, a pillar is erected in the hollow portion of the steel base member, and between the pillars erected A construction method of a road protection fence characterized in that a fence member such as a pipe material, a beam material, or a cable material is erected.   Before driving the steel base member into the ground with a driving machine, a steel jig having a base portion mounted on the top end of the steel base member and a downward projecting portion insertable into the hollow portion The road according to claim 11, characterized in that the downward projection is set by being inserted into the hollow portion, and the steel base member is removed after being driven into the ground by a driving machine. Construction method of guard fences.

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