JPH07229149A - Steel sheathing wall - Google Patents

Abstract

PURPOSE:To make a strut driven straight at the time of driving the strut into the ground. CONSTITUTION:A strut 12 has a both-sided tapered forward end part 12a blocked up in such a manner as to become narrower at the tip. The both-sided tapered forward end part 12a is formed by crushing the vicinity of the tip of a round steel pipe from both sides in the diametral direction in such a manner that the central part is recessed, and then crushing the vicinity of the tip in the direction right-angled to the crushing direction. A sheathing steel plate 11 has an opening part 14 nearly rhombic in top view, which is formed by slit punching or bending one rectangular steel plate. The sheathing steel plate 11 is erected on the ground, and the strut 12 is inserted in the opening part 14 to be driven. As the forward end part 12a of the strut 12 is bilaterally symmetrical, at the time of driving the strut into the ground, it can be driven straight in the ground without shifting to the right and left.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simple steel retaining wall made of a retaining steel plate and columns.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG.
There is known a simple steel retaining wall 3 made up of a retaining steel plate 1 made of one steel plate and a support rod 2 made of a round steel pipe that supports the retaining steel plate 1 and is driven into the soil. This type of steel retaining wall 3 is used for retaining soil with a low height when a large lateral pressure is not applied (Japanese Patent Publication No. 47-4228).
No. 5, JP-B-51-22290, JP-B-58-602
No. 0). The soil retaining steel plate 1 is, for example, 0.6 mm (thickness) x 435 mm (upper and lower width) x 1815 mm (length) rectangular slit steel plate is subjected to slit punching and bending to insert the columns 2. It has a structure in which a substantially rhombic opening 4 is formed when viewed from the top surface. This earth retaining steel plate 1 is erected on the ground or in a groove, and a pillar 2 having the opening 4 inserted therein is driven into the soil to make a simple steel. The retaining wall 3 will be used.
As for the pillar 2 in the conventional steel soil retaining wall 3, as shown in the figure, the tip of a round steel pipe is simply cut obliquely in one direction to form a single-sided tapered tip portion 2a that remains open.

The opening 4 of the soil retaining steel plate 1 is
It is manufactured as shown in FIGS. First, FIG.
As shown in Fig. 1, a rectangular steel plate A is
The pair of slits 5 are formed at intervals in the vertical direction. The slit 5 has a width of, for example, about 3 mm and is formed by punching. However, as shown in FIG. 18, burrs b are generated on both edges of the slit 5 as shown in the figure. It should be noted that normally, round hole-shaped notches 6 are provided to prevent cracks from occurring at both ends of the slit 5. And the strip | belt-shaped part 7 between the said pair of slits 5 and the strip | belt-shaped part 8 above and below (it says the upper and lower sides as a retaining wall) are extruded in a mutually opposite direction, as shown in FIG. The opening 4 is formed. Although omitted in FIGS. 20 and 17, the upper and lower edges of the steel plate A are folded back for reinforcement. This folded portion is indicated by reference numeral 9.

[0004]

Since the tip portion 2a of the above-mentioned conventional strut 2 has a one-sided taper shape obtained by simply cutting the tip end of a round steel pipe obliquely in one direction, when it is driven into the soil,
The strut 2 did not always go straight in the driving direction, but was often driven in a direction opposite to the tapered surface. Further, when the support column 2 is driven in, the support column 2 is inserted into the opening 4 of the retaining steel plate 1 as shown by the two-dot chain line in FIG.
Often damaged the stanchion 2. Since the opening 4 is usually formed so that the folded-back portion 9 is on the outer side, the burrs b at the upper and lower ends of the strip-shaped portion 7 come to the inner surface side of the opening 4 and come into contact with and damage the support column 2.

The present invention has been made in order to solve the above-mentioned conventional drawbacks, and provides a simple steel earth retaining wall in which the pillars are driven straight into the soil when the pillars supporting the steel retaining steel plates are driven. With the goal. Further, it is another object of the present invention to provide a steel retaining wall that does not damage the support column due to burrs when the support column is inserted into the opening of the retaining steel plate.

[0006]

According to the present invention for solving the above-mentioned problems, at least a pair of slits parallel to the upper and lower sides of a rectangular steel plate are vertically provided at a plurality of positions in the longitudinal direction of the rectangular steel plate. A retaining steel sheet which is formed and is formed by extruding the strip-shaped portion between the pair of slits and the upper and lower strip-shaped portions in mutually opposite directions to form an opening for inserting a strut that is substantially diamond-shaped when viewed from above. , In a steel earth retaining wall consisting of a pillar made of a round steel pipe that is inserted into the opening of the earth retaining steel plate and is driven into the soil, the pillar has a central portion when viewed from the front in the vicinity of the tip of the circular steel pipe. It is characterized in that it has a double-sided tapered tip end portion that is closed in a tapered shape and is formed by crushing from both sides so as to be recessed, and then crushing the vicinity of the tip end in a direction perpendicular to the crushing direction. It should be noted that the rhombus of the opening does not mean that it is strictly a rhombus, and also includes a case where a curvature is attached.

According to a second aspect of the present invention, in the steel soil retaining wall of the first aspect, the substantially diamond-shaped openings are inclined in a direction in which the upper and lower edges near the center in the longitudinal direction of the strip portion of the steel retaining sheet are inclined. It is characterized in that an inclined portion is formed.

[0008]

[Operation] In the above structure, since the tip end of the column made of round steel pipe is closed in a tapered shape on both sides and has a symmetrical shape, when the column is driven into the soil, the column moves to the left and right. It is driven straight into the soil without it.

In the second aspect, when the support pillar passes through the opening of the retaining steel plate, the support pillar passes while contacting the vicinity of the center in the longitudinal direction of the strip-shaped portion forming the opening. Even if there are burrs on the upper edge and the lower edge of the strip, the upper edge and the lower edge are inclined in the direction in which the substantially rhombic opening extends.
The stanchions pass through the openings without contacting the burr. Therefore, the brace will not be damaged by the burr.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a perspective view of a steel soil retaining wall of the present invention. This steel soil retaining wall 13 is composed of a steel retaining steel plate 11 made of one steel plate and a pillar 12 made of a round steel pipe that supports the soil retaining steel plate 11 and is driven into the soil. It is the same. The column 12 in the present invention has a double-sided tapered tip portion 12a closed in a tapered shape as shown in the figure. Details of the double-sided tapered tip portion 12a are shown in FIGS. The double-sided tapered tip portion 12a is formed from both sides (in the direction orthogonal to the paper surface in FIG. 2) so that the central portion (the central portion in the left-right direction in FIG. 2) viewed from the front near the tip of the round steel pipe is recessed. After being crushed (from both sides), the vicinity of the tip is crushed in a direction perpendicular to the crushing direction (from both the left and right directions in FIG. 2) to form a double-sided taper with the tip closed in a tapered shape. Is. This crushing process is performed by two separate pressing processes using two types of molds. The AA cross section, the BB cross section, the CC cross section, and the DD cross section in FIG. 2 are shown in cut end views in FIGS. 5, 6, 7, and 8, respectively. In addition, as shown in FIG.
Both corners of the lower end of the
May be formed. This makes the tip sharper and reduces the impact force into the soil.

Next, the details of the soil retaining steel sheet 11 are shown in FIGS.
It shows in FIG. The process of producing the soil retaining steel plate 11 is the same as the conventional process up to the stage shown in FIGS.
That is, by punching, a pair of slits 5 parallel to the upper and lower sides a of the rectangular steel plate A are formed at intervals in the vertical direction together with the round hole-shaped notches 6 at both ends thereof. Also,
Folded portions 9 for reinforcement are provided on the upper and lower edges of the steel sheet. Next, the strip-shaped portion 7 between the pair of slits 5 and the strip-shaped portions 8 above and below the slit 5 are extruded in opposite directions to each other, and as shown in FIG.
However, in the present invention, the substantially rhombic opening 14 spreads at the upper edge and the lower edge near the center in the longitudinal direction (left-right direction in FIG. 10) of the strip 7 between the slits 5 at that time. A slanted portion 7a that is slanted in the direction is formed.

When constructing a steel soil retaining wall 13 using the soil retaining steel plate 11 and the columns 12, for example, as shown in FIG. 13, the soil retaining steel plate 11 is erected on the ground and the opening 14 of the soil retaining steel plate 11 is formed. Insert the column 12 into the
Through the lower end of the column, and then impact the upper end of the column 12 to drive the column 12 into the soil. In the above work,
As shown in FIGS. 11 and 12, when the support column 12 passes through the opening 14 of the retaining steel plate 11, the support column 12 passes while contacting with the vicinity of the longitudinal center of the strip 7 of the retaining steel plate 11. And the inclined portion 7a at the lower edge is the substantially rhombic opening 1
4 is inclined in the direction in which
Through the opening 14 without contacting the. Therefore, the brace 12 is not damaged by the burr b. Since the surface of the pillar 12 is not damaged, it is possible to apply the paint to the pillar 12 or the retaining steel plate 11 in order to improve the appearance. In addition, prop 1
Since the tip end portion 12a of 2 has a bilaterally symmetrical shape which is closed in a tapered shape on both sides and tapered, it is driven straight into the soil when the support column 12 is driven into the soil without moving to the left or right.

In the above-mentioned embodiment, the case where the steel soil retaining wall 13 is constituted by only one soil retaining steel plate 11 is shown.
Usually, a plurality of earth retaining steel plates 11 are horizontally connected and used. In this case, as shown in FIG. 14, the strip-shaped portions 7 on the respective end sides of the adjacent soil retaining steel plates 11 are overlapped to form an opening 14 common to the adjacent soil retaining steel plates 11, and the common opening 14 is supported by a pillar. Insert 12. Further, although the embodiment shows the case where the steel soil retaining wall 13 is composed of only one stage of the soil retaining steel plates 11 in the vertical direction, the soil retaining steel plates 11 may be vertically connected in a plurality of stages. In this case, as shown in FIG. 15, vertically connect the strip-shaped portions 7 and 8 so as to overlap each other, or form a triangular cutout 15 for vertical connection as shown in FIG. 16 and engage the upper and lower cutouts 15 with each other. You can also connect them vertically.

Although the retaining steel sheet 11 of the above-mentioned embodiment has the openings 14 at three positions in the longitudinal direction, it is sufficient that there are at least two or more in the longitudinal direction. In addition, the soil retaining steel plate 1 of the example
1 has a structure in which a pair of slits 5 are formed in the vertical direction and have three strip-shaped portions 7 and 8 in the vertical direction, but three or more slits are formed and four or more strip-shaped portions are formed. It can also be configured. In either case, at least the strip-shaped portion having the burr on the inner surface of the opening 14 is formed with the inclined portions at the upper edge portion and the lower edge portion. Further, the steel soil retaining wall of the present invention does not exclude the use as a mere fence.

[0015]

EFFECTS OF THE INVENTION According to the present invention, since the front end of the pillar is closed in a tapered shape on both sides and has a bilaterally symmetrical shape, when the pillar is driven into the soil, the pillar is deflected to the left and right. It can be driven straight into the soil without.

According to the second aspect of the present invention, the diamond-shaped opening extends so that the upper edge and the lower edge near the longitudinal center of the strip forming the diamond-shaped opening when viewed from the top of the retaining steel sheet. Since it was tilted, when the support pillar was inserted into the opening of the retaining steel plate, the support pillar was not damaged by the burr at the opening.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a steel soil retaining wall of the present invention.

FIG. 2 is an enlarged front view of the vicinity of the tip of the column in FIG.

FIG. 3 is a side view of FIG.

FIG. 4 is a bottom view of FIG.

5 is a sectional view taken along line AA in FIG.

FIG. 6 is a sectional view taken along line BB in FIG.

7 is a sectional view taken along line CC of FIG.

FIG. 8 is a sectional view taken along line DD of FIG.

FIG. 9 is a diagram showing another example of the tip shape of the support column.

FIG. 10 is a front view of a main part of the soil retaining steel plate in FIG.

11 is a plan view of FIG.

12 is a sectional view taken along line EE of FIG.

FIG. 13 is a view showing a construction state of the steel soil retaining wall of FIG. 1.

FIG. 14 is an explanatory diagram of another example of a usage state of the soil retaining steel plate.

FIG. 15 is an explanatory diagram of still another example of the usage mode of the soil retaining steel plate.

FIG. 16 is an explanatory diagram of still another example of the usage mode of the soil retaining steel plate.

FIG. 17 is a diagram illustrating a process common to the present invention and a conventional example, for explaining a manufacturing process of a retaining steel sheet.

FIG. 18 is a sectional view taken along line FF of FIG.

FIG. 19 shows a conventional example, and FIG.
It is a sectional view of the state where it was shape | molded to the No. 0 soil retaining steel plate.

FIG. 20 is a perspective view showing a conventional steel retaining wall.

[Explanation of symbols]

 A Steel plate a Upper and lower sides 5 Slit 7 Strip-shaped part 7a Sloping part 8 Upper and lower strip-shaped parts 11 Soil retaining steel plate 12 Struts 12a Double-sided tapered tip part 12b Sloping part 13 Steel retaining wall 14 Opening

Claims (3)

[Claims] 1. A rectangular steel plate is provided at a plurality of positions in a longitudinal direction,
At least one pair of slits parallel to the upper and lower sides of this steel plate are formed at intervals in the vertical direction, and the strips between the pair of slits and the strips above and below are extruded in opposite directions, In a steel earth retaining wall, which is composed of a steel retaining steel plate having an opening for inserting a pillar, which is substantially diamond-shaped, and a pillar by a round steel pipe inserted into the opening of the steel retaining steel plate and driven into the soil, The stanchions were formed by crushing the center part of the round steel pipe near the tip viewed from the front from both sides so that the center part was recessed, and then crushing the tip vicinity in the direction perpendicular to the crushing direction. A steel retaining wall having a double-sided tapered tip end closed in a lump shape. 2. An earth retaining member, wherein inclined portions are formed in an upper edge portion and a lower edge portion near a center in a length direction of a strip portion of the earth retaining steel sheet, the inclined portions being inclined in a direction in which the substantially rhombic opening is widened. steel sheet. 3. The steel soil retaining wall according to claim 1, wherein both corners of the lower end of the double-sided tapered tip portion of the pillar are obliquely cut to form an inclined portion.