JP5257470B2 - Combined steel wall - Google Patents

Description

The present invention relates to a combined steel wall used for harbor / river revetment, mountain retaining and deadline construction in the field of civil engineering and construction.
In addition, in this specification, a Z-shaped steel sheet pile means the steel sheet pile in which the flange was continuously formed in the both ends of the web arrange | positioned diagonally, and this whole shape became a substantially Z shape.

As a steel wall used for harbor and river revetment, mountain retaining, and deadline construction in the civil engineering and construction field, there is a combined steel wall combining a U-shaped steel sheet pile and an H-shaped steel (see Patent Document 1).
The combined steel sheet pile described in Patent Document 1 is “U formed in a substantially U-shaped cross section from a web portion, a flange portion provided at both ends of the web portion, and an arm portion provided at one end of the flange portion. It is formed from a section steel sheet pile and an H-section steel that is installed with one flange fixed to the web portion on one side of the U-shaped steel sheet pile "(see claim 1 of Patent Document 1).

JP 2002-212943 A

The combined steel wall of Patent Document 1 is such that a web portion of a U-shaped steel sheet pile and a flange of an H-shaped steel are fixed in advance by welding or the like, and are sequentially placed on the ground.
Therefore, there is a trouble that the U-shaped steel sheet pile and the H-shaped steel must be fixed in advance. Moreover, it has a complicated shape in which a U-shaped steel sheet pile and an H-shaped steel are fixed in advance, and since the cross section is large, there is also a problem that ground resistance is large and placement is difficult.
Moreover, since it is a shape which fixes the flange of a H-section steel to the web part of a U-shaped steel sheet pile, there also exists a problem that the steel weight per unit length is large and material cost becomes high.

In addition, although it is also conceivable that H-shaped steel is connected in parallel between the joint portion and the joint portion of the U-shaped steel sheet pile, the hat-shaped steel sheet pile, or the Z-shaped steel sheet pile, It is called a Lalsen type and is not a shape that can be directly connected to other steel members such as H-shaped steel.
Therefore, to construct a combined steel wall by connecting a conventional Z-shaped steel sheet pile or the like and an H-shaped steel in parallel, in order to connect the Z-shaped steel sheet pile or the like and the H-shaped steel, the H-shaped Z-shaped steel sheet pile or the like A separate connector is required to connect the two to steel.

However, if a connector is provided separately, the material cost for the connector is added, resulting in poor economic efficiency. Further, there is a problem that extra time is required for attaching the connector, and the entire construction period for constructing the combined steel wall becomes long.
Furthermore, depending on the shape of the connector, if the Ralsen joint and H-section steel are connected, the connector will protrude outside the flange of the Z-shaped steel sheet pile, and the plane of the part will be maintained. Disappear. Therefore, construction labor increases, for example, an extra backfilling concrete is required when installing the angry member.

  The present invention has been made to solve such problems, and an object thereof is to provide a combined steel wall formed by connecting a Z-shaped steel sheet pile and an H-shaped steel without using a separate member called a connector. .

(1) The combined steel wall according to the present invention has a flange portion at both ends of a web portion, and a Z-shaped steel sheet pile having a joint portion at each end of the flange portion and an H-shaped steel. A combined steel wall composed of:
A flange portion of H-shaped steel is disposed along the axial direction of the flange portion of the Z-shaped steel sheet pile, a Z-shaped steel sheet pile is disposed along the axial direction of the flange portion of the H-shaped steel, and the Z shape It has a combination part arranged in the order of Z-shaped steel sheet pile, H-shaped steel, Z-shaped steel sheet pile in which the joint part of the steel sheet pile and the end of the flange part of the H-shaped steel are directly connected It is.

(2) Moreover, in the above-described (1), the joint portion of the Z-shaped steel sheet pile includes a first joint portion formed at the tip of one flange portion constituting the Z-shaped steel sheet pile, and the other joint portion. A second joint portion formed at the tip of the flange portion, and when the Z-shaped steel sheet pile is adjacently disposed, the first joint portion and the second joint portion are engageable, Z-shaped steel sheet piles located at the ends of the combined parts of the Z-shaped steel sheet pile, H-shaped steel, and Z-shaped steel sheet pile are connected to each other.

(3) Further, in the above-described (2), the first joint portion has a bulge at the tip and a main claw disposed on the inner side of the steel sheet pile, and is formed to face the main claw. A double-claw joint having a sub-claw arranged on the outer side of the steel sheet pile,
The second joint portion has a main claw having a bulging portion at the tip and disposed on the outer side of the steel sheet pile, and a secondary claw disposed on the inner side of the steel sheet pile formed to face the main claw. It is a heavy claw type joint,
The flange portion of the H-shaped steel is characterized in that a protrusion projecting in the thickness direction of the flange portion is provided at an end portion thereof.

(4) Moreover, in the above-described (2), the first joint portion has a bulge at the tip and a main claw disposed inside the steel sheet pile, and is formed so as to face the main claw. A double-claw joint having a sub-claw arranged on the outer side of the steel sheet pile,
The second joint portion has a main claw having a bulging portion at the tip and disposed on the outer side of the steel sheet pile, and a secondary claw disposed on the inner side of the steel sheet pile formed to face the main claw. It is a heavy claw type joint,
The flange portion of the H-shaped steel is provided with a groove portion at an end portion thereof.

(5) Further, in the above (3) or (4), the first joint portion is provided at the tip of the flange portion via a first bent portion that bends toward the inside of the steel sheet pile. By providing the first bent portion, the outer surface of the sub-claw does not protrude outward from the steel sheet pile than the outer surface of the flange portion,
The second joint portion is provided at the tip of the flange portion via a second bent portion that is bent toward the inner side of the steel sheet pile, and by providing the second bent portion, the outer surface of the main claw is provided on the sub-plate. The steel sheet pile is arranged by a distance equal to or greater than the thickness of the nail.

  In the combined steel wall of the present invention, the flange portion of the H-shaped steel is arranged along the axial direction of the flange portion of the Z-shaped steel sheet pile, and Z is aligned along the axial direction of the flange portion of the H-shaped steel. A shaped steel sheet pile is arranged, and has a combination part of a Z-shaped steel sheet pile, H-shaped steel, and Z-shaped steel sheet pile in which a joint portion of the Z-shaped steel sheet pile and an end portion of the flange portion of the H-shaped steel are directly connected. Therefore, it is not necessary to fix the Z-shaped steel sheet pile and the H-shaped steel in advance, and the workability is excellent because each member can be placed on the ground. Moreover, since the end of the flange part of the H-shaped steel is directly connected to the joint part of the Z-shaped steel sheet pile, it is not necessary to use a separate connector or the like to connect the Z-shaped steel sheet pile and the H-shaped steel. Excellent workability and reduced material costs.

It is explanatory drawing of the combination steel wall which concerns on one embodiment of this invention. It is an enlarged view of the A section enclosed with the circle of FIG. It is explanatory drawing of the Z-shaped steel sheet pile which comprises the combination steel wall which concerns on one embodiment of this invention. FIG. 4 is an enlarged view of a portion C surrounded by a circle in FIG. 3. FIG. 4 is an enlarged view of a portion D surrounded by a circle in FIG. 3. It is explanatory drawing of the H-section steel which comprises the combination steel wall which concerns on one embodiment of this invention. It is explanatory drawing of the other aspect of the H-section steel which comprises the combination steel wall which concerns on one embodiment of this invention.

The combined steel wall 1 according to this embodiment has a flange portion at both ends of a web portion, and a Z-shaped steel sheet pile 2 having a joint portion at each end of the flange portion and an H-shaped steel 4 are connected. The flange portion of the H-shaped steel 4 is arranged along the axial direction of the flange portion of the Z-shaped steel sheet pile 2, and the axial direction of the flange portion of the H-shaped steel 4. Z-shaped steel sheet pile 2 is arranged along the Z-shaped steel sheet pile 2 and the joint of the Z-shaped steel sheet pile 2 and the end of the flange portion of the H-shaped steel 4 are directly connected. The Z-shaped steel sheet piles 2 are connected to each other at the end of the combined position of the Z-shaped steel sheet pile 2, the H-shaped steel 4, and the Z-shaped steel sheet pile 2. It will be.
Hereinafter, the Z-shaped steel sheet pile 2 and the H-shaped steel 4 constituting the combined steel wall 1 will be described in detail.

<Z-shaped steel sheet pile>
As shown in FIG. 3, the Z-shaped steel sheet pile 2 according to the present embodiment includes a first joint portion 5 formed at the tip of the first flange portion 3 constituting the Z-shaped steel sheet pile 2, and a second flange portion. Z having a second joint portion 9 formed at the tip of 7, Z-shaped steel sheet piles 2 can be arranged adjacent to each other, and the first joint portion 5 and the second joint portion 9 can be engaged and connected. It is a shaped steel sheet pile.
And the 1st joint part 5 has the bulging part 11 in the front-end | tip, the main nail | claw 13 arrange | positioned inside a steel sheet pile, and the subnail | claw arrange | positioned outside the steel sheet pile formed so as to oppose the main claw 13 15 (see FIG. 4).
Moreover, the 2nd coupling part 9 has the bulging part 11 in the front-end | tip, the main nail | claw 13 arrange | positioned on the steel sheet pile outer side, and the subnail | claw arrange | positioned inside the steel sheet pile formed so as to oppose the main claw 13 15 (see FIG. 5).
Hereinafter, the details of the Z-shaped steel sheet pile 2 will be described in more detail by dividing them into an overall shape and a joint part.

<Overall shape>
The Z-shaped steel sheet pile 2 has a first flange portion 3 on one end side of a web portion 16 disposed obliquely, and a first joint portion 5 is formed at the tip of the first flange portion 3. It has the 2nd flange part 7 in the end side, the 2nd coupling part 9 is formed in the front-end | tip of the 2nd flange part 7, and it has a substantially Z shape as a whole.

<Fitting part>
Since the basic shape of the 1st joint part 5 and the 2nd joint part 9 is the same, it is demonstrated based on FIG. 4, FIG.
As shown in FIGS. 4 and 5, the first joint part 5 and the second joint part 9 are divided into a joint body part 17 formed so as to be continuous with the front end of the flange part, and the joint body part 17 into two branches. The main claw 13 and the sub claw 15 are formed so as to face each other.
As for the main nail | claw 13, the base is thin and the bulging part 11 is formed in the front-end | tip. The bulging portion 11 of the main claw 13 in the present embodiment has a substantially rectangular shape, and the shape of the entire main claw 13 is T-shaped. The bulging portion 11 is not limited to a rectangular shape, and may be a circle or an ellipse.

  The connecting portion 19 between the T-shaped horizontal piece and the vertical piece in the main claw 13 has an outer bending angle that is sharper than an inner bending angle. Since the inner bending angle is smooth, the joint interior 21 surrounded by the main claws 13 and the sub claws 15 in the joint portion has a smooth arc shape. Since the joint interior 21 has a smooth arc shape, the degree of freedom of rotation is increased when the joint portions are connected.

The sub claw 15 has a thick root and a thickness that decreases toward the tip, and has a smooth curved shape as a whole.
The main claw 13 of the joint portion connected to the inside of the joint 21 surrounded by the main claw 13 and the sub claw 15 is inserted. Since the bulging portion 11 is formed on the main claw 13, the main claw 13 does not come out from the gap between the main claw 13 and the sub claw 15.

  The first joint portion 5 and the second joint portion 9 are common in that they have the main claws 13 and the sub claws 15 described above, but there are also differences. The 1st joint part 5 arrange | positioned and the 2nd joint part 9 arrange | positioned at the right side in FIG. 3 are demonstrated separately.

(First joint part)
When the 1st joint part 5 connects the 1st joint part 5 and the 2nd joint part 9, and forms the combination steel wall 1 (refer FIG. 1), the sub nail | claw 15 is a steel sheet pile in the connected joint part. It is arranged outside.
The outer side of the steel sheet pile refers to the side opposite to the side where the web portion 16 is present with respect to the axis of the first flange portion 3, and the opposite side to the inner side of the steel sheet pile, ie, the central axis of the first flange portion 3. The side where the web part 16 is located.

  The 1st coupling part 5 is arrange | positioned at the steel sheet pile inner side so that the sub nail | claw 15 may be arrange | positioned at the steel sheet pile outer side, and the main nail | claw 13 may oppose the sub nail | claw 15. The first joint portion 5 is connected to the first flange portion 3 through a first bent portion 23 that bends from the first flange portion 3 to the inside of the steel sheet pile. Since the first joint portion 5 is provided via the first bent portion 23, the outermost part of the steel sheet pile on the outer surface of the sub claw 15 disposed on the outer side of the steel sheet pile is the first flange portion 3. It is designed to be flush with the outer surface (see FIGS. 2 and 4).

(Second joint part)
When the 2nd joint part 9 connects the 1st joint part 5 and the 2nd joint part 9 and forms the combination steel wall 1, the main nail | claw 13 is arrange | positioned in the connected joint part on the steel sheet pile outer side. Is.
The 2nd joint part 9 is arrange | positioned at the steel sheet pile inner side so that the main nail | claw 13 may be arrange | positioned at the steel sheet pile outer side, and the sub nail | claw 15 may oppose the main nail | claw 13.

The 2nd joint part 9 is connected with the 2nd flange part 7 via the 2nd bending part 25 bent from the 2nd flange part 7 to a steel sheet pile inner side. The second bent portion 25 has a longer extension distance to the inner side of the steel sheet pile than the first bent portion 23 formed on the first joint portion 5 side.
Since the second joint portion 9 is provided via the second bent portion 25, the outermost part of the steel sheet pile on the outer surface of the main claw 13 disposed on the outer side of the steel sheet pile is the second flange portion 7. It arrange | positions only the distance S rather than the outer surface (refer FIG. 5). The distance S is set to a distance that is equal to or greater than the thickness of the auxiliary nail 15.

<H-section steel>
As shown in FIG. 6, the H-shaped steel 4 has a web portion 35 and a flange portion 37, and faces outward at the tip of the flange portion 37 (opposite to the web portion 35 with respect to the axis of the flange portion 37). A protruding projection 39 is provided.
As shown in FIG. 1, the protrusion 39 is formed when the tip of the flange portion 37 of the H-shaped steel 4 is inserted into the first joint portion 5 or the second joint portion 9 of the Z-shaped steel sheet pile 2. Engages with the second joint portion 9. For this reason, even if a tensile force acts on the H-section steel 4 in the axial direction of the flange portion 37, the flange portion 37 of the H-section steel 4 does not come out of the first joint portion 5 or the second joint portion 9.
In addition, the projection 39 projects outward (on the opposite side to the web portion 35 with respect to the axis of the flange portion 37) as in the present embodiment, and also on the outside and inside (with respect to the axis of the flange portion 37). And the same projecting side as the web portion 35) or projecting only inward.

Next, the construction method of the combined steel wall 1 will be described.
As shown in FIG. 1, for example, the Z-shaped steel sheet pile 2 on the left side in the figure is placed, and then the tip of the flange portion 37 of the H-shaped steel 4 (inside the first joint portion 5 of the Z-shaped steel sheet pile 2) The H-section steel 4 is driven in such a manner that the tip on the left side in the figure is inserted.
Next, the Z-shaped steel sheet pile 2 is made so that the other tip (the tip on the right side in the figure) of the flange portion 37 of the H-shaped steel 4 is inserted into the joint of the first joint portion 5 of the Z-shaped steel sheet pile 2. To cast. Next, the Z-shaped steel sheet pile 2 is driven so that the second joint portion 9 of the cast Z-shaped steel sheet pile 2 and the first joint portion 5 of another Z-shaped steel sheet pile 2 are engaged. Next, the tip of the flange portion 37 of the H-shaped steel 4 (the tip on the left side in the figure) is inserted into the joint of the second joint portion 9 of the cast Z-shaped steel sheet pile 2 so that the H-shaped steel 4 To cast. Next, the Z-shaped steel sheet pile 2 is made so that the other tip (the right tip in the drawing) of the flange portion 37 of the H-shaped steel 4 is inserted into the joint of the second joint portion 9 of the Z-shaped steel sheet pile 2. To cast.
By repeating the same, the combined steel wall 1 is constructed.

  At the time of placing, the Z-shaped steel sheet pile 2 is easily rotated by receiving the ground force. However, in this case, the double-claw joint portion of the present embodiment has a high degree of freedom in rotation. Thus, the joint portion is not deformed at the time of placing. In addition, the double-claw joint has a high resistance to the tensile force, so that deformation is small. Therefore, the highly accurate combination steel wall 1 can be formed.

In addition, as shown in FIG. 2, when the H-section steel 4 is arranged between the first joint portions 5 of the two Z-shaped steel sheet piles 2, the one that protrudes outside the steel sheet pile beyond the first flange portion 3. Instead, in this example, the outer surfaces of the first flange portions 3 of the two Z-shaped steel sheet piles 2 arranged with the H-shaped steel 4 interposed therebetween are flush with each other.
When the outer surfaces of the first flange portions 3 of the two Z-shaped steel sheet piles 2 are flush with each other, it becomes possible to directly install the waistline material on the part. If a connector or the like is used, if the connector protrudes outside the steel sheet pile, for example, concrete or the like must be interposed in the part, and an abdomen should be installed. There is no hassle and excellent workability.

Even in the connected state, since the joint portion of the present embodiment has a high degree of freedom of rotation, even when an earthquake force or the like is applied, excessive force is not applied to the joint portion, and the joint portion is deformed or the like. There is nothing.
Further, since the double-claw joint portion of the present embodiment is excellent in tensile strength, the joint portion is not deformed or the like when the Z-shaped steel sheet pile 2 receives a tensile force. Therefore, it is excellent in the water stoppage of the joint part.

  As described above, the combined steel wall 1 of the present embodiment can be constructed by directly connecting the Z-shaped steel sheet pile 2 and the H-shaped steel 4 without using another member called a connector.

In addition, in said embodiment, as shown in FIG. 1 regarding arrangement | positioning of the Z-shaped steel sheet pile 2 and the H-shaped steel 4, Z-shaped steel sheet pile 2, H-shaped steel 4, Z-shaped steel sheet pile 2, Z-shaped Although the example of arrangement | positioning called steel sheet pile 2, H-section steel 4, Z-shaped steel sheet pile 2 ... was shown, this invention is not restricted to this, For example, the following arrangements may be sufficient.
(a) Z-shaped steel sheet pile 2, H-shaped steel 4, Z-shaped steel sheet pile 2, H-shaped steel 4, Z-shaped steel sheet pile 2, H-shaped steel 4,. Are arranged alternately.
(b) A plurality of Z-shaped steel sheet piles 2 are arranged next to the combination parts arranged in the order of Z-shaped steel sheet pile 2, H-shaped steel 4, Z-shaped steel sheet pile 2, and then again Z-shaped steel sheet piles. It arrange | positions so that there may exist the combination site | part arrange | positioned in order of 2 * H-section steel 4 * Z-shaped steel sheet pile 2. FIG.

Further, in the above embodiment, the example in which the protrusion 39 is provided at the tip of the flange portion 37 of the H-shaped steel 4 has been shown. However, as shown in FIG. You may make it provide the groove part 40 engaged with the 1 joint part 5 or the 2nd joint part 9. FIG.
In addition, as shown in FIG. 7, the groove part 40 may be provided on the outer side (the side opposite to the web part 35 with respect to the axis of the flange part 37), or the outer side and the inner side (with respect to the axis of the flange part 37). It may be provided both on the same side as the web portion 35, or may be provided only inside.

DESCRIPTION OF SYMBOLS 1 Combination steel wall 2 Z-shaped steel sheet pile 3 1st flange part 4 H-section steel 5 1st joint part 7 2nd flange part 9 2nd joint part 11 bulging part 13 Main nail | claw 15 Sub claw 16 Web part 17 Joint body Part 19 Connection part 21 Inside of joint 23 First bent part 25 Second bent part 27 Steel sheet pile wall 35 Web part 37 Flange part 39 Projection 40 Groove part

Claims (5)

A combined steel wall configured by connecting a Z-shaped steel sheet pile having a flange portion at both ends of the web portion and a joint portion at each end of the flange portion, and an H-shaped steel,
A flange portion of H-shaped steel is disposed along the axial direction of the flange portion of the Z-shaped steel sheet pile, a Z-shaped steel sheet pile is disposed along the axial direction of the flange portion of the H-shaped steel, and the Z shape A combination characterized by having a combination portion arranged in the order of a Z-shaped steel sheet pile, an H-shaped steel, and a Z-shaped steel sheet pile, in which a joint portion of a steel sheet pile and an end of the flange portion of the H-shaped steel are directly connected. Steel wall.   The joint part of the Z-shaped steel sheet pile has a first joint part formed at the tip of one flange part constituting the Z-shaped steel sheet pile and a second joint part formed at the tip of the other flange part. When the Z-shaped steel sheet piles are arranged adjacent to each other, the first joint portion and the second joint portion can be engaged, and the combination of the Z-shaped steel sheet pile, the H-shaped steel, and the Z-shaped steel sheet pile. 2. The combined steel wall according to claim 1, wherein Z-shaped steel sheet piles positioned at the ends of the parts are connected to each other. The first joint portion has a main claw having a bulging portion at the tip and disposed inside the steel sheet pile, and a secondary claw disposed outside the steel sheet pile formed to face the main claw. It is a heavy claw type joint,
The second joint portion has a main claw having a bulging portion at the tip and disposed on the outer side of the steel sheet pile, and a secondary claw disposed on the inner side of the steel sheet pile formed to face the main claw. It is a heavy claw type joint,
The combined steel wall according to claim 2, wherein the flange portion of the H-shaped steel is provided with a protrusion protruding in the thickness direction of the flange portion at an end portion thereof. The first joint portion has a main claw having a bulging portion at the tip and disposed inside the steel sheet pile, and a secondary claw disposed outside the steel sheet pile formed to face the main claw. It is a heavy claw type joint,
The second joint portion has a main claw having a bulging portion at the tip and disposed on the outer side of the steel sheet pile, and a secondary claw disposed on the inner side of the steel sheet pile formed to face the main claw. It is a heavy claw type joint,
The combined steel wall according to claim 2, wherein the flange portion of the H-shaped steel has a groove portion at an end thereof. The first joint portion is provided at the front end of the flange portion via a first bent portion that is bent toward the inner side of the steel sheet pile. By providing the first bent portion, the outer surface of the sub-jaw is a flange portion. It is designed not to protrude outward from the steel sheet pile than the outer surface of
The second joint portion is provided at the front end of the flange portion via a second bent portion that is bent toward the inside of the steel sheet pile, and by providing the second bent portion, the outer surface of the main claw is provided on the sub-joint. 5. The combined steel wall according to claim 3, wherein the combined steel wall is disposed on the inner side of the steel sheet pile by a distance equal to or greater than the thickness of the claw.

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