JPWO2017038629A1 - Cascade structure of hat-type steel sheet pile, cascade hat-type steel sheet pile unit, and steel wall - Google Patents

Abstract

The longitudinal structure of the hat-type steel sheet pile is a longitudinal structure of the hat-type steel sheet pile in which the first hat-type steel sheet pile and the second hat-type steel sheet pile are abutted and connected to each other in the end surfaces in the material axis direction. A first locked portion protruding outward from the side surface of the one-hat type steel sheet pile; and the first locked portion of the first hat-type steel sheet pile provided on the side surface of the second hat-type steel sheet pile And an erected portion that is locked in the direction of the material axis.

Description

The present invention relates to a longitudinal structure of a hat-type steel sheet pile that connects a plurality of hat-type steel sheet piles in the material axis direction, a longitudinally-hatted steel sheet pile unit having this longitudinal structure, and the longitudinally-hatted steel sheet pile unit in the wall width direction. It is related with the structural wall connected to.
This application claims priority based on Japanese Patent Application No. 2015-168456 filed in Japan on August 28, 2015 and Japanese Patent Application No. 2006-004004 filed in Japan on January 13, 2016 These contents are incorporated herein by reference.

  Conventionally, for example, a hat-type steel sheet pile cascade structure disclosed in Patent Document 1 is known as one that can be constructed inexpensively and simply by reducing the construction period and cost while ensuring the water-stopping, rigidity, and proof strength of the cascade part. Proposed.

Patent document 1 is disclosing the cascade structure which connects the hat-type steel sheet pile which has at least 1 each one or more webs and flanges, and was formed in the cross-sectional bending shape up and down. The cascade structure includes a lower joint member, an upper joint member, and a fixing means.
The lower joint member protrudes from the surface of the web and the flange and is fixed at at least two different locations of the web and the flange at the upper end of the lower hat type steel sheet pile. The upper joint member protrudes from the surface of the web and the flange and is fixed at at least two different positions of the web and the flange at the lower end of the upper hat-type steel sheet pile corresponding to the lower joint member. The fixing means fixes the lower joint member and the upper joint member in a state where the upper end edge of the lower hat type steel sheet pile and the lower end edge of the upper hat type steel sheet pile are in contact with each other.

Japanese Unexamined Patent Publication No. 2011-38288

  However, in the longitudinal connection structure of the hat-type steel sheet pile disclosed in Patent Document 1, the cross-sectional performance of the steel plate that becomes the lower joint member and the upper joint member is smaller than the cross-sectional performance of the hat-type steel sheet pile connected vertically. Thus, the bending rigidity of the joint portion where only the lower joint member and the upper joint member are arranged is lowered. Therefore, when a larger bending load than expected is applied, there is a possibility that the joint portion becomes a structural weak point.

There is also a method of connecting a plurality of hat-type steel sheet piles by on-site welding, but in the case of a hat-type steel sheet pile whose cross-section has been increasing in recent years, the cross-sectional area of one hat-type steel sheet pile is large and the amount of welding is increased. Therefore, the welding time per one portion of the joint portion is long, and in particular, the construction period is prolonged when there are many portions of the joint portion.
And even by a method of connecting a plurality of hat-type steel sheet piles by high-strength bolt friction welding, the shear strength per one high-strength bolt is not so high, and a connection strength comparable to the cross-sectional performance of the hat-type steel sheet pile is ensured. A large number of high-strength bolts are required. Accordingly, the attachment plate becomes large and the processing cost increases, and the tightening of many high-strength bolts increases the construction time and the construction period.
These problems are particularly prominent in a hat-type steel sheet pile having a large dimension in the wall width direction as compared with steel members such as H-shaped steel and steel pipe.

  The present invention has been devised in view of the above-described problems, and its object is to secure sufficient bending rigidity at a location where a plurality of hat-type steel sheet piles are connected in the axial direction. And it is providing the cascade structure of the hat-type steel sheet pile which can suppress a connection cost, a cascade hat-type steel sheet pile unit, and a steel wall.

  The outline of the present invention is as follows.

(1) The first aspect of the present invention is a cascade structure of a hat-type steel sheet pile in which the first hat-type steel sheet pile and the second hat-type steel sheet pile are abutted and connected to each other in the end surfaces in the material axis direction. A first locked portion protruding outward from a side surface of the first hat-type steel sheet pile; and a first engagement of the first hat-type steel sheet pile provided on a side surface of the second hat-type steel sheet pile An erection part that is engaged with the stop part in the material axis direction.
According to the longitudinal connection structure of the hat-type steel sheet pile according to the above aspect, the installation portion provided on the side surface of the second hat-type steel sheet pile is engaged with the first locked portion that protrudes outward from the side surface of the first hat-type steel sheet pile. Since it is stopped, it can oppose the bending stress which acts on the cascade location of a hat-type steel sheet pile by an installation part, and can improve bending rigidity. In addition, the first hat-type steel sheet pile and the second hat-type steel sheet pile can be obtained by locking the installation portion provided on the second hat-type steel sheet pile to the first locked portion of the first hat-type steel sheet pile at the time of cascade construction. Can be connected easily and reliably, so that it is possible to perform the cascade construction without requiring a labor and costly welding operation.

(2) The longitudinal connection structure of the hat-type steel sheet pile according to (1) further includes a second locked portion that protrudes outward from the side surface of the second hat-type steel sheet pile; In addition to the first locked portion, a configuration in which the second locked portion is also locked may be adopted.
According to the cascade structure of the hat-type steel sheet pile of the above aspect, the first hat-type steel sheet pile and the second can be secured by locking the installation part to the second locked part of the second hat-type steel sheet pile at the time of the cascade construction. Since the hat-type steel sheet pile can be more easily and reliably connected, it is possible to perform the cascade construction without requiring a labor and costly welding operation.

(3) In the cascade structure of the hat-type steel sheet piles according to (2), the end face of the first hat-type steel sheet pile and the end face of the first locked portion are flush with each other; the second hat-type steel sheet pile You may employ | adopt the structure where the end surface of this and the end surface of said 2nd to-be-latched part are flush | level.
According to the cascade structure of the hat-type steel sheet pile of the above aspect, not only the end faces of the first hat-type steel sheet pile and the second hat-type steel sheet pile, but also the both end faces of the first locked portion and the second locked portion. Can be matched. Accordingly, the compressive force acting in the direction in which the first hat-type steel sheet pile and the second hat-type steel sheet pile are close to each other in the material axis direction can be borne not only on the end face of the steel sheet but also on the side face of the locked portion. Thus, it becomes possible to cope with a larger bending load.

(4) In the longitudinal structure of the hat-type steel sheet pile according to any one of (1) to (3), the first locked portion extends in the direction of the material axis on the tip side. A structure having a protrusion, and the erection portion has a recess extending in a wall width direction perpendicular to the material axis direction and a plate thickness direction of the first hat-type steel sheet pile and being locked to the extension protrusion. It may be adopted.
According to the longitudinal connection structure of the hat-type steel sheet pile according to the above aspect, the extended protrusion of the first locked portion is slid in the wall width direction with respect to the recess of the extending portion, thereby erection with the first locked portion. Since the parts are locked with each other, the connecting operation can be easily performed. Furthermore, since it is possible to prevent the installation part from falling off from the first locked part, the first hat-type steel sheet pile and the second hat-type steel sheet pile can be more reliably connected.

(5) The longitudinal structure of the hat-type steel sheet pile according to (4) further includes a slide preventing portion that restrains relative movement in the wall width direction between the installation portion and the first locked portion. A configuration may be adopted.
According to the longitudinal connection structure of the hat-type steel sheet piles of the above aspect, the sliding prevention portion prevents the construction portion and the first locked portion from moving relative to each other to release the locked state between them.

(6) In the longitudinal structure of the hat-type steel sheet pile according to any one of (1) to (5), a plurality of the first locked portions are provided apart from each other along the material axis direction. May be adopted.
According to the cascade structure of the hat-type steel sheet piles of the above aspect, since the bending stress that one first locked portion is responsible for can be lowered, damage to the first locked portion can be prevented.

(7) In the cascade structure of the hat-type steel sheet piles described in (6) above, a configuration in which the plurality of first locked portions are provided integrally with a common base material may be employed.
According to the longitudinal structure of the hat-type steel sheet pile of the above aspect, the separation distances of the plurality of first locked portions that are separated from each other in the material axis direction can be kept constant. Therefore, when attaching a plurality of first locked portions to the first hat-type steel sheet pile, all the first locked portions are accurately attached in one step of fixing the base material to the first hat-type steel sheet pile. be able to.

(8) In the longitudinal structure of the hat-type steel sheet pile according to any one of (1) to (7), a portion of the erection part excluding a locking part with the first locked part is defined. A configuration may be adopted in which a cross-sectional area when viewed in a cross section perpendicular to the material axis direction is maximized at a butt position between the first hat-type steel sheet pile and the second hat-type steel sheet pile.
According to the longitudinal structure of the hat-type steel sheet pile of the above aspect, in order to increase the cross-sectional area of the installation portion where the bending rigidity is most required, it is possible to achieve both weight reduction and securing the bending rigidity. Can do.

(9) The second aspect of the present invention is a cascade hat-type steel sheet pile unit having the cascade structure of the hat-type steel sheet pile according to any one of (1) to (8).
According to the hat-type steel sheet pile of the said aspect, a cascade construction can be performed, without requiring the welding operation which requires an effort and cost.

(10) According to a third aspect of the present invention, the cascade hat-type steel sheet pile unit according to (9) is arranged in a wall width direction perpendicular to the material axis direction and the thickness direction of the first hat-type steel sheet pile. A plurality of continuous steel walls, each of the erection parts of the longitudinally-hatted steel sheet pile units adjacent to each other in the wall width direction being arranged with the positions in the material axis direction being different from each other Made of wall.
According to the longitudinal connection structure of the hat-type steel sheet pile of the above aspect, it is possible to avoid that the connection points that can be structural weak points are continuous in the wall width direction, and thus ensure high bending rigidity in the entire wall body. Can do.

According to the cascade structure of the hat-type steel sheet pile according to the aspect described in (1) above, it is possible to ensure the bending rigidity by the erection part and perform reliable cascade construction without requiring welding work as in the conventional structure. . Therefore, it becomes possible to ensure sufficient bending rigidity while suppressing the construction cost when connecting a plurality of hat-type steel sheet piles in the direction of their material axes.
According to the cascade structure of the hat-type steel sheet piles according to the aspect described in (2) above, it is possible to further reduce the construction cost when cascade-connecting a plurality of hat-type steel sheet piles in the material axis direction.
According to the longitudinal connection structure of the hat-type steel sheet pile according to the aspect described in (3) above, it is possible to ensure further sufficient bending rigidity.
According to the cascade structure of the hat-type steel sheet pile according to the aspect described in (4) above, it is possible to further reduce the construction cost of the cascade construction.
According to the longitudinal connection structure of the hat-type steel sheet pile according to the aspect described in (5) above, it is possible to prevent the locked state between the installation portion and the first locked portion from being released, so that the connection state between the two can be reliably and It becomes possible to be healthy.
According to the longitudinal connection structure of the hat-type steel sheet pile according to the aspect described in (6) above, since the breakage of the first locked portion can be prevented, the vertical distance between the first hat-type steel sheet pile and the second hat-type steel sheet pile. The bending rigidity at the joint can be further increased.
According to the longitudinal connection structure of the hat-type steel sheet pile according to the aspect described in the above (7), it is possible to accurately attach all the first locked portions in one step, so that the construction cost can be further suppressed. Become.
According to the longitudinal connection structure of the hat-type steel sheet pile according to the aspect described in (8) above, it is possible to use the installation portion that is lightweight and has high bending rigidity.
According to the cascade structure of the hat-type steel sheet pile according to the aspect described in (9) above, reliable cascade construction can be performed without requiring welding work as in the conventional structure. Therefore, it becomes possible to ensure sufficient bending rigidity while suppressing the construction cost when connecting a plurality of hat-type steel sheet piles in the direction of their material axes.
According to the longitudinal structure of the hat-type steel sheet pile according to the aspect described in (10) above, high bending rigidity can be ensured in the entire wall body.

It is a perspective view which shows the steel wall to which the cascade structure of a hat-type steel sheet pile is applied. It is a front view of the cascade structure of a hat-type steel sheet pile. It is a top view of the cascade structure shown in FIG. It is a top view of the cascade structure in case an installation part is provided also in the web part of a hat-type steel sheet pile. It is a top view of the cascade structure in case a construction part is provided in both surfaces of a hat-type steel sheet pile. It is a rear view of a construction part. It is a side view of a construction part. It is a front view of a cascade structure, and a part is seen in cross section. It is a longitudinal cross-sectional view of a cascade structure. It is a longitudinal cross-sectional view of the cascade structure in which a to-be-latched part is provided in the edge part of both a 1st hat type steel sheet pile and a 2nd hat type steel sheet pile. It is a longitudinal cross-sectional view of the cascade structure in which a to-be-latched part is provided only in the edge part of a 1st hat type | mold steel sheet pile. It is a longitudinal cross-sectional view of the cascade structure in which a to-be-latched part is provided in both surfaces of a hat-type steel sheet pile. It is a longitudinal cross-sectional view of the cascade structure in which a bolt is screwed together by a welding nut. It is a longitudinal cross-sectional view of the cascade structure by which a volt | bolt is screwed together by the internal thread part formed in the side surface of a hat-type steel sheet pile. It is a side view of the cascade structure in which an installation part side protrusion and a to-be-latched part are formed in cross-sectional substantially rectangular shape. It is a side view of the cascade structure in which an installation part side protrusion and a to-be-latched part are formed in cross-sectional substantially trapezoid shape. It is a side view of the cascade structure in which an installation part side protrusion and a to-be-latched part are formed in cross-sectional substantially T shape. It is a side view of the cascade structure in which a construction part side protrusion and a locked part are formed by welding flat steel. It is a longitudinal cross-sectional view of the cascade structure in which a construction part side protrusion and a to-be-latched part are formed substantially parallel to each other. It is the elements on larger scale of the cascade structure shown to FIG. 14A. It is the modification of the cascade structure shown to FIG. 14A. It is another modification of the cascade structure shown to FIG. 14A. It is a longitudinal cross-sectional view of the cascade structure in which the space | interval on the front end side of a construction part side protrusion and a to-be-latched part is formed smaller than the space | interval of a base end side. It is the elements on larger scale of the cascade structure shown to FIG. 15A. It is a longitudinal cross-sectional view of the cascade structure in which the one end surface on the opposite side to the contact surface of a construction part side protrusion and a to-be-latched part is formed at a substantially right angle. It is the elements on larger scale of the cascade structure shown to FIG. 16B. It is a longitudinal cross-sectional view for demonstrating the compressive force which acts on a hat-type steel sheet pile. It is a longitudinal cross-sectional view for demonstrating the tensile force which acts on a hat-type steel sheet pile. It is a longitudinal cross-sectional view for demonstrating the curvature deformation which arises in a construction part. It is a longitudinal cross-sectional view of the cascade structure in which a construction part side protrusion is pinched | interposed into a to-be-latched part. FIG. 18B is a longitudinal sectional view showing a case where eccentric bending acts on the erection portion in the cascade structure shown in FIG. 18A. FIG. 3 is a longitudinal sectional view of a cascade structure in which the erection portion side projection and the locked portion are formed in a taper shape at a position farthest from the abutment surface of the first hat type steel sheet pile and the second hat type steel sheet pile, The case where an eccentric bending acts on a part is shown. In a construction part, it is a longitudinal cross-sectional view of the cascade structure in which the plate | board thickness dimension of the center side flat plate part is formed larger than the plate | board thickness dimension of the flat plate part by the side of an edge part. In a construction part, it is a longitudinal cross-sectional view of the cascade structure in which the plate | board thickness dimension of the center side flat plate part is formed larger than the plate | board thickness dimension of the flat plate part by the side of an edge part. In a construction part, it is a longitudinal cross-sectional view of the cascade structure in which the plate | board thickness dimension of the center side flat plate part is formed larger than the plate | board thickness dimension of the flat plate part by the side of an edge part. It is a perspective view which shows the state which moves the construction part of the cascade structure which concerns on the embodiment to the plate | board thickness direction X. FIG. It is a perspective view which shows the state which moves the construction part in which the construction part side processus | protrusion of the substantially trapezoidal cross section or substantially T shape was formed in the wall width direction Z. FIG. It is a perspective view which shows the state which moves the construction part in which the wedge-shaped construction part side protrusion and the to-be-latched part were formed to the wall width direction Z. FIG. It is a front view which shows the plate member cut and processed. It is a front view which shows the construction part cut and processed. It is a front view which shows the installation part side protrusion and to-be-latched part inclined in the wall width direction Z. It is a front view which shows the state which aligns the board member in which the protrusion part was formed, and the board member in which the hollow part was formed. It is a front view which shows the state by which the protrusion part was fitted by the hollow part. It is a perspective view which shows the construction part which slides. It is a perspective view which shows the frame member attached to a construction part. It is a perspective view which shows the state pinched | interposed by the both sides of a frame member. It is a front view which shows the construction part provided with the volt | bolt etc. which penetrated in the material-axis direction Y. It is a longitudinal cross-sectional view of the construction part shown to FIG. 26A. It is a perspective view which shows the construction part which slides. It is a perspective view which shows the eaves member attached to a construction part. It is a perspective view which shows the eaves member fitted by the notch groove. It is a top view which shows the bending load which acts on a hat-type steel sheet pile.

  Hereinafter, a longitudinal connection structure 1 (hereinafter simply referred to as a longitudinal connection structure 1) of a hat-type steel sheet pile according to an embodiment of the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 1, the cascade structure 1 includes, for example, a plurality of hat-type steel sheet piles 2 (first ones) embedded below and above the ground 8 in a narrow site where a long hat-type steel sheet pile cannot be constructed. The hat-type steel sheet pile 2A and the second hat-type steel sheet pile 2B) are used to connect each other in the material axis direction Y.

  By connecting the plurality of hat-type steel sheet piles 2 in the material axis direction Y, a long longitudinal joint-type steel sheet pile unit 70 is formed. And the steel wall 7 is constructed | assembled in the ground 8 grade | etc., By connecting this longitudinally-hat-type steel sheet pile unit 70 in multiple numbers in the wall width direction Z. As shown in FIG.

  As shown in FIG. 2, the hat-type steel sheet piles 2 connected in the material axis direction Y are connected by the erection part 5 in a state where the end surfaces 3 a of the end portions 3 in each material axis direction Y face each other.

  The erection part 5 is made of, for example, steel and is laid across the side surfaces 3b and 3b of the end part 3 in the material axis direction Y of each hat-type steel sheet pile 2 facing each other in the material axis direction Y.

  As shown in FIG. 3, the hat-type steel sheet pile 2 includes a flange portion 2a, a pair of web portions 2b, a pair of arm portions 2c, and a pair of joint portions 2d. By fitting the joint portions 2 d of the hat-type steel sheet piles 2 adjacent to each other in the wall width direction Z, a plurality of hat-type steel sheet piles 2 can be connected in the wall width direction Z.

  The hat-type steel sheet pile 2 is formed by extending in the wall width direction Z to form a flange portion 2a, and inclining each web portion 2b from each of both ends of the flange portion 2a in the wall width direction Z. A groove S is formed. In the hat-type steel sheet pile 2, each arm portion 2c is formed from one end of each web portion 2b, and each joint portion 2d is formed at the tip of each arm portion 2c.

  The hat-type steel sheet pile 2 has a flat surface 20 formed in a substantially flat shape in the flange portion 2a, the web portion 2b, and the arm portion 2c.

The erection part 5 may be erected only on the flat surface 20 of the flange part 2a as shown in FIG. 3, or may be erected on the flat surface 20 of the flange part 2a and the pair of web parts 2b as shown in FIG. As shown in FIG. 5, the flange portion 2 a and the pair of arm portions 2 c may be installed on the flat surface 20. In particular, as shown in FIG. 5, the erection part 5 may be installed not only on one side of the flat surface 20 but also on both sides.
In addition, in the example shown in FIG. 4, the three erection parts 5 are each erected on the flat surface 20 of the flange part 2a and the pair of web parts 2b, but the plurality of erection parts 5 are integrated to form a hat-type steel sheet pile. It may be erected.

6A and 6B, the erection part 5 includes a flat plate part 51 using a steel plate and the like, and an erection part side protrusion 50 that protrudes from the flat plate part 51 in the plate thickness direction X.
The erection portion side protrusion 50 extends linearly continuously in the wall width direction Z, and is integrally formed with the flat plate portion 51 by hot rolling or cold rolling.

  The erection portion side protrusion 50 may be formed integrally with the flat plate portion 51 by cutting a steel plate or the like. Further, the erection part 5 may be obtained by using a steel plate as the flat plate part 51 and welding the erection part side protrusions 50 to the side surfaces thereof.

  The erection part 5 has, for example, a plate thickness 51 having a thickness t of about 9 mm to 25 mm, a width B of about 50 mm to 125 mm, or about 200 mm to 400 mm, and a height H of about 200 mm to 400 mm. Further, the erection part 5 has a length L in the material axis direction Y of each erection part side protrusion 50 of about 10 mm to 38 mm, and a height h in the plate thickness direction X of about 4.5 mm to 25 mm. The distance D at which the protrusions 50 are separated from each other is set to about 60 mm to 100 mm.

  As shown in FIGS. 7A and 7B, the erection part 5 has a flat plate part 51 that is continuous with the side surface 3b of the upper and lower hat-type steel sheet piles 2 in the material axis direction Y, and the erection part side protrusion 50 has a flat plate part 51. It protrudes toward the side surface 3b. The installation part 5 is provided along the flat surface 20 formed in each edge part 3 of the hat-type steel sheet pile 2.

  The flat plate portion 51 is formed in a substantially rectangular shape as shown in FIG. 7A, for example. As shown in FIG. 7B, the flat plate portion 51 is penetrated in the plate thickness direction X on each of the upper side and the lower side in the material axis direction Y to form bolt insertion holes 40. The flat plate portion 51 is provided with a plurality of erection portion side protrusions 50 spaced apart from each other along the material axis direction on the side surface facing the flat surface 20 of the end portion 3 of the hat-type steel sheet pile 2. In this case, since the bending stress which the installation part side protrusion 50 per one can take can be lowered | hung, the damage of the installation part side protrusion 50 can be prevented. However, it is not necessary to provide a plurality of the erection part side protrusions 50, and only one may be provided.

As shown in FIGS. 7A and 7B, the erection portion side protrusion 50 has a locked portion 60 (first locked portion) protruding outward from the side surface 3 b of the end portion 3 of the first hat-type steel sheet pile 2 </ b> A. ) And the locked portion 60 (second locked portion) protruding outward from the side surface 3b of the end 3 of the second hat-type steel sheet pile 2B. This restrains the relative movement in the material axis direction Y between the first hat-type steel sheet pile 2A and the second hat-type steel sheet pile 2B.
In this way, the erection portion side protrusion 50 is formed on each of the upper side and the lower side of the flat plate portion 51 in the material axis direction Y, and is provided on the side surface 3b of the end portion 3 of the first hat-type steel sheet pile 2A. The locked portions 60 are locked to each other. Therefore, it is possible to resist the bending stress acting on the longitudinally connected portion of the hat-type steel sheet pile 2 by the erection part 5 and to increase the bending rigidity. In addition, since the plurality of hat-type steel sheet piles 2 can be easily and reliably connected by the erection part 5, it is possible to perform the cascade construction without requiring a labor and costly welding operation.

  In the cascade structure 1 shown in FIGS. 7A and 7B, the locked portions 60 extend in a straight line continuously in the wall width direction Z and are provided apart from each other along the material axis direction Y. . The locked portion 60 is formed integrally with the plate member 6 (base material), and the plate member 6 is attached to the side surface 3 b of the end portion 3 of the hat-type steel sheet pile 2. In the plate member 6, a locked portion 60 extending linearly continuously in the wall width direction Z is integrally formed with the plate member 6 by hot rolling or cold rolling.

7A and 7B, the end face 3a of the first hat-type steel sheet pile 2A and the end face in the material axis direction Y of the plate member 6 of the locked portion 60 are flush with each other, and the second hat The end surface 3a of the steel sheet pile 2B and the end surface in the material axis direction Y of the plate member 6 of the locked portion 60 are configured to be flush with each other.
According to this configuration, not only the end faces 3a of the first hat-type steel sheet pile 2A and the second hat-type steel sheet pile 2B but also the end faces of the locked portion 60 can be abutted. Therefore, the first hat-type steel sheet pile 2A and the second hat-type steel sheet pile 2B can bear not only the end face of the steel sheet but also the side face of the locked portion, acting in the direction of approaching each other in the material axis direction. Therefore, it is possible to resist a larger bending load.
7A and 7B, the end faces of the plate members 6 are abutted with each other, but even if the plate member 6 is not provided, the material axis direction Y of the locked portion 60 The same effect can be obtained as long as the end faces of each other are in contact with each other.

  The locked portion 60 may be formed integrally with the plate member 6 by cutting a steel plate or the like. Moreover, the to-be-latched part 60 may be obtained by using a steel plate as the plate member 6 and welding and joining a flat steel to the side surface.

  In the cascade structure 1 shown in FIGS. 7A and 7B, a plurality of the locked portions 60 are provided on the side surfaces so as to be separated from each other along the material axis direction Y. Therefore, since the bending stress which one to-be-latched part 60 takes can be lowered | hung, the damage to the to-be-latched part 60 can be prevented. However, only one locked portion 60 may be provided.

Further, in the cascade structure 1 shown in FIGS. 7A and 7B, a plurality of locked portions 60 provided apart from each other along the material axis direction Y are integrated with a single plate member 6 that is a common base material. Is formed. Therefore, the separation distance of the plurality of locked portions 60 that are separated from each other in the material axis direction can be kept constant. Therefore, when attaching the plurality of locked portions 60 to the hat-type steel sheet pile 2, all the locked portions 60 are accurately set in one step of fixing the base plate member 6 to the hat-type steel sheet pile 2. Can be installed.
However, as shown to FIG. 8A, you may provide the to-be-latched part 60 by attaching a flat steel etc. to the side surface 3b of the edge part 3 of the hat-type steel sheet pile 2 by welding directly.

  Further, in the cascade structure 1 shown in FIGS. 7A and 7B, the erection part 5 is locked to the locked part 60 of the first hat-type steel sheet pile 2A and the second hat-type steel sheet pile 2B. As shown to FIG. 8B, you may latch only to the to-be-latched part 60 of 2 A of 1st hat-type steel sheet piles. In this case, the erection part side protrusion 50 is not formed on the flat plate part 51 of the erection part 5, and the side surface 3b of the end 3 of the second hat-type steel sheet pile 2B and the flat plate part 51 are directly attached by welding or the like. Furthermore, as shown in FIG. 8C, the erection part 5 may be attached to both surfaces of the hat-type steel sheet pile 2.

  As shown in FIGS. 7A and 7B, the erection part 5 is a bolt that penetrates in the thickness direction X from the flat plate part 51 to the end part 3 of the hat-type steel sheet pile 2 on the side surface 3 b of the end part 3 of the hat-type steel sheet pile 2. 4 is bolted. The installation part 5 is fixed to the end part 3 of the hat-type steel sheet pile 2 by screwing the fastening nut 41 with the bolt 4 on the back surface of the end part 3 of the hat-type steel sheet pile 2.

  The installation portion 5 is not only fixed by using a fastening nut 41 tightened in the plate thickness direction X, but also, for example, as shown in FIGS. 9A and 9B, the flat surface of the end portion 3 of the hat-type steel sheet pile 2 The welding nut 42 or the female screw portion 43 provided on the head 20 may be used and fixed. At this time, the erection part 5 is fixed by screwing the bolt 4 to the welding nut 42 or the female thread part 43. Even in this case, the erection part 5 may be attached to both surfaces of the hat-type steel sheet pile 2.

  The bolt 4 is inserted into a bolt insertion hole 40 formed in the flat plate portion 51 of the installation portion 5, the plate member 6, and the end portion 3 of the hat-type steel sheet pile 2. As shown in FIG. 9A, the bolt 4 is screwed into a welding nut 42 attached to the end 3 of the hat-type steel sheet pile 2 by welding, or as shown in FIG. 2 is screwed into a female screw portion 43 formed at the end portion 3 of the two.

  As shown in FIG. 10, the erection portion side protrusion 50 and the locked portion 60 are formed in a substantially rectangular cross section. The erection portion side protrusion 50 and the locked portion 60 may be formed in a substantially trapezoidal cross section as shown in FIG. 11, particularly when formed by hot rolling or cold rolling. Moreover, as shown in FIG. 12, it may be formed in a substantially T-shaped cross section.

  As shown in FIGS. 10 to 12, the erection portion side protrusion 50 and the locked portion 60 receive the tensile force T in the direction in which the plurality of hat-type steel sheet piles 2 are separated from each other in the material axis direction Y, The one end surface of the side protrusion 50 in the material axis direction Y and the one end surface of the locked portion 60 in the material axis direction Y are in contact with each other.

  The erection portion side protrusion 50 and the locked portion 60 are formed with the abutment surface 30 by abutting the respective one end surfaces facing each other in the material axis direction Y. The erection portion side protrusion 50 and the locked portion 60 have a plurality of hat-shaped steels in which each one end surface is locked in the material axis direction Y by the contact surface 30 and resists the tensile force T. The sheet piles 2 are restrained so as not to be separated from each other in the material axis direction Y.

  As shown in FIG. 10, the erection portion side protrusion 50 and the locked portion 60 are formed in a substantially rectangular cross section so that the erection portion side protrusion 50 is substantially orthogonal to the side surface of the flat plate portion 51 of the erection portion 5. The abutment surface 30 is formed, and the abutment surface 30 of the locked portion 60 is formed substantially orthogonal to the flat surface 20 of the end portion 3 of the hat-type steel sheet pile 2 or the side surface of the plate member 6.

  As shown in FIG. 11, the erection portion side protrusion 50 and the locked portion 60 are formed in a substantially trapezoidal cross section so that they are tapered in the plate thickness direction X toward the end portion 3 of the hat-type steel sheet pile 2. The erected portion-side projection 50 is formed in a slanted manner, and a locked portion 60 is formed in a tapered shape in the plate thickness direction X toward the flat plate portion 51 of the erected portion 5.

  As shown in FIG. 11, the erection part-side protrusion 50 has a proximal end side that is connected to a flat plate part 51 of the erection part 5 at a distal end side 50 a that is protruded toward the side surface 3 b of the end part 3 of the hat-type steel sheet pile 2. More than 50b, the taper is inclined so as to widen in the material axis direction Y. Moreover, the to-be-latched part 60 is connected to the flat surface 20 of the edge part 3 of the hat-type steel sheet pile 2, or the board | plate member 6 from the front end side 60a protruded toward the flat plate part 51 of the installation part 5. The taper is inclined so as to be wider in the material axis direction Y than 60b.

  As shown in FIG. 11, the erection portion side protrusion 50 and the locked portion 60 are formed so that each one end surface thereof is substantially parallel to each other, so that the contact surface 30 is inclined in a taper direction in the plate thickness direction X. Are brought into contact with each other. The erection portion side protrusion 50 and the locked portion 60 are inclined in a taper shape so that the front end side 50a of the erection portion side protrusion 50 is widened, and the front end side 60a of the locked portion 60 is widened. By being inclined in a taper shape, the contact surfaces 30 are locked so as not to be separated from each other in the plate thickness direction X.

  As shown in FIG. 12, the erection portion side protrusion 50 and the locked portion 60 are formed to have a substantially T-shaped cross section so that the erection portion side protrusion 50 and the locked portion 60 are extended in the material axis direction Y at the distal end side 50 a of the erection portion side protrusion 50. The portion-side extending portion 52 is formed, and the locked portion-side extending portion 62 is formed by extending in the material axis direction Y at the distal end side 60 a of the locked portion 60.

  The erection part-side protrusion 50 and the locked part 60 are formed so that the base end side 50b of the erection part-side protrusion 50 and the locked part-side extension part 62 of the locked part 60 are formed substantially parallel to each other. 30 abuts. The erection part side protrusion 50 and the locked part 60 are formed so that the erection part side extending part 52 of the erection part side protrusion 50 and the proximal end side 60b of the locked part 60 are formed substantially parallel to each other. Abutted.

  The erection portion side protrusion 50 and the locked portion 60 include an erection portion side extending portion 52 on the distal end side 50 a of the erection portion side protrusion 50, and a locked portion side extending portion 62 on the distal end side 60 a of the locked portion 60. However, by extending in the material axis direction Y, they are locked so as not to be separated from each other in the plate thickness direction X.

  The erection portion side protrusion 50 and the locked portion 60 are formed with the erection portion side protrusion 50 inclined in a taper shape, and the locked portion 60 inclined in a taper shape is formed. The erection portion side extending portion 52 on the distal end side 50 a of the side protrusion 50 and the locked portion side extending portion 62 on the distal end side 60 a of the locked portion 60 may be formed.

  As shown in FIG. 13, the erection portion side protrusion 50 and the locked portion 60 are separated from the abutment surface 30 when the distance D that is separated from each other is greater than the length L in the material axis direction Y. At one end face arranged on the opposite side, the erection portion side projection 50 is welded to the side surface of the flat plate portion 51 of the erection portion 5, and the flat surface 20 of the end portion 3 of the hat-type steel sheet pile 2 or the side surface of the plate member 6 is covered. The locking part 60 may be welded.

  The cascade structure 1 is formed with a plurality of erection portion side projections 50 that are locked to the plurality of locked portions 60, and are shown in FIGS. 14A, 14B, 14 C, 14 D, 15 A, 15 B, 16 A, and 16 B. As shown, it is desirable that the erection portion side protrusion 50 and the locked portion 60 are formed to be inclined in a tapered shape. The cascade structure 1 has an end portion 53 in the material axis direction Y of the erection portion side projection 50, an R portion 30 a is formed on the distal end side 50 a and the proximal end side 50 b of the erection portion side projection 50, and the locked portion Since the R portion 30a is formed on the distal end side 60a and the proximal end side 60b of the locked portion 60 on one end surface 63 in the material axis direction Y of 60, workability is improved by easy extrusion.

  As shown in FIGS. 14A and 14B, in the cascade structure 1, in particular, as shown in FIGS. 14A and 14B, one end surfaces 53 of the erection portion side protrusions 50 facing each other in the material axis direction Y are substantially parallel to each other. It is preferable that one end surface 63 of each locked portion 60 facing each other in the material axis direction Y is tapered so as to be substantially parallel to each other. In this case, in a state where the erection portion side protrusion 50 is locked to the locked portion 60, the one end surface 53 of the erection portion side protrusion 50 and the one end surface 63 of the locked portion 60 that are opposed to each other in the material axis direction Y However, they are formed so as to be substantially parallel to each other, and the workability can be further improved.

  At this time, in the cascade structure 1, the interval W1 between the distal end sides 50a where the plurality of erection part side protrusions 50 are separated from each other in the material axis direction Y is the same as the interval W1 between the erection part side protrusions 50 apart from each other in the material axis direction Y. The inclination angle θ1 of the abutment surface 30 of the erection portion side projection 50 that resists the tensile force T (the inclination angle of the side surface far from the end portion 3), which is substantially the same size as the interval W2 of the end side 50b, and the abutment The inclination angle θ2 of the one end face 53 opposite to the face 30 (the inclination angle of the side face close to the end portion 3) is substantially the same at each position.

  Further, in the cascade structure 1, the interval W1 between the distal end sides 60a where the plurality of locked portions 60 are separated from each other in the material axis direction Y is the base end where the plurality of locked portions 60 are separated from each other in the material axis direction Y. The inclination angle θ1 of the abutment surface 30 of the locked portion 60 that resists the tensile force T and the inclination of the one end surface 63 opposite to the abutment surface 30 are substantially the same as the interval W2 of the side 60b. The angle θ2 has substantially the same size at each position.

  In the cascade structure 1, for example, the radius of curvature of the R portion 30a can be about 5 mm, and the inclination angle θ1 can be about 45 °. In the cascade structure 1, for example, the interval W1 is set to about 30 mm, and the smaller the difference in the size between the interval W1 and the interval W2, the more advantageous the improvement of workability by extrusion.

In the example shown in FIG. 14B, the tilt angle θ1 is less than 90 ° and the tilt angle θ2 is greater than 90 °. However, as in the modification shown in FIG. 14C, the tilt angle θ1 is greater than 90 °. The inclination angle θ2 may be less than 90 °.
In addition, in the example shown in FIG. 14B, both side surfaces of the protrusion 50 are parallel, but the protrusion 50 may be tapered toward the tip side as in another modification shown in FIG. 14D. .

  Further, when the erection part side protrusion 50 and the locked part 60 are formed in a substantially trapezoidal cross section, the longitudinal connection structure 1 has a plurality of erection part side protrusions 50 as shown in FIGS. 15A and 15B. The interval W1 of the side 50a is formed smaller than the interval W2 of the base end side 50b of the plurality of erection portion side protrusions 50, and the interval W1 of the distal end side 60a of the plurality of locked portions 60 is a plurality of engaged It is formed smaller than the interval W <b> 2 on the base end side 60 b of the stopper 60. At this time, as shown in FIGS. 16A and 16B, the cascade structure 1 is configured so that the inclined angle of the one end surface 53 of the erection portion side protrusion 50 on the side opposite to the contact surface 30 and the locked portion are set as necessary. The inclination angle (inclination angle θ2) of the one end face 63 of 60 may be formed at a substantially right angle.

  Here, the cascade structure 1 has a plurality of hats as shown in FIG. 17A, a compressive force P acting in a direction approaching the plurality of hat-type steel sheet piles 2 in the material axis direction Y, or as shown in FIG. 17B. A tensile force T acting on the steel sheet pile 2 in the direction of separating in the material axis direction Y is generated. When the tensile force T is applied to the plurality of hat-type steel sheet piles 2, the cascade structure 1 has a distance in the plate thickness direction X from the contact surface 30 of the erection portion side protrusion 50 to the center of gravity of the flat plate portion 51. As shown in FIG. 17C, the bending of the erection part side projection 50 may occur due to the bending of the erection part 5 as shown in FIG. 17C.

  For this reason, in the cascade structure 1, as shown in FIGS. 18A to 18C, the erection portion side protrusion 50 formed on the end portion side G in the material axis direction Y is separated or applied from both sides in the material axis direction Y. It is desirable to be sandwiched between the two to-be-latched portions 60 in a state of contact. At this time, the cascade structure 1 is provided with a locked portion 60 on the upper end side in the material axis direction Y of the erection part 5 and further above the erection part side protrusion 50, and in the material axis direction Y of the erection part 5. On the lower end side, the locked portion 60 is provided further below the erection portion side protrusion 50.

As a result, the longitudinally connecting structure 1 has the erection portion side protrusion 50 closest to the end portion G in the material axis direction Y sandwiched between the plurality of locked portions 60 from both sides in the material axis direction Y. As shown, even when the eccentric bending acts on the erection part 5, the erection part 5 is locked to the locked part 60 above or below the erection part side protrusion 50. Therefore, the warp deformation of the erection part 5 is suppressed, and the detachment of the erection part side protrusion 50 can be prevented.
In the cascade structure 1, the one end surface 53 of the erection portion side projection 50 opposite to the contact surface 30 and the one end surface 63 of the locked portion 60 are formed in a substantially right angle, as shown in FIG. 18C. As described above, it is preferable that they are formed in a tapered shape and locked to each other in order to more reliably prevent the erection portion side protrusion 50 from being detached.

Further, as shown in FIGS. 19A to 19C, the cascade structure 1 is centered in the material axis direction Y with respect to the plate thickness dimension t <b> 2 of the flat plate portion 51 on the end side G of the installation portion 5 in the material axis direction Y. It is preferable to increase the thickness t1 of the flat plate portion 51 of F.
Thus, the cross-sectional area when the portion excluding the locking portion with the locked portion 60 of the erected portion 5 is viewed in a cross section perpendicular to the material axis direction Y is the largest at the butting position of the hat-type steel sheet pile 2. By enlarging, the cross-sectional area of the location where bending rigidity is most required among the installation parts 5 can be enlarged. Therefore, it is possible to achieve both weight reduction of the erection part 5 and securing of bending rigidity.

In the cascade structure 1 shown in FIG. 19A, the erection portion 5 is formed in a taper shape by projecting the outer surface 51a of the flat plate portion 51 on the center side F with respect to the end side G, so that the thickness t2 is larger than the plate thickness dimension t2. The plate thickness dimension t1 is increased.
In the cascade structure 1 shown in FIGS. 19B and 19C, the inner surface 51b of the flat plate portion 51 is protruded on the center side F from the end portion side G, so that the plate thickness dimension t1 is made smaller than the plate thickness dimension t2. It is getting bigger. Specifically, as shown in FIG. 19B, the thickness of the flat plate portion 51 is gradually decreased as the distance from the end portion 3 is increased, or as shown in FIG. 19C, the thickness of the flat plate portion 51 is decreased. The plate thickness dimension t1 may be made larger than the plate thickness dimension t2 by gradually decreasing it stepwise as the distance from the end portion 3 increases.

Thereby, the cascade structure 1 makes the plate | board thickness dimension t1 of the flat plate part 51 of the center side F larger than the plate thickness dimension t2 of the flat plate part 51 of the edge part G of the installation part 5, and is a material axis direction The rigidity of the erection part 5 at the center side F of Y is improved. Therefore, even when an eccentric bending is applied to the erection part 5, the warp deformation is suppressed in the erection part 5, and the detachment of the erection part side protrusion 50 can be prevented.
In addition, as shown in FIGS. 18A to 18C, in the cascade structure 1, the erection portion side protrusion 50 on the most end side G is sandwiched between a plurality of locked portions 60 from both sides in the material axis direction Y. However, as shown in FIGS. 19A to 19C, the plate thickness dimension t1 of the flat plate portion 51 on the center side F in the material axis direction Y can be increased.

As described above, in the longitudinally connected structure 1 shown in FIGS. 11, 12, 14A to 19C and the like, the locked portion 60 has an extended protrusion (tapered) extending in the material axis direction Y on the tip side. It has a part of the to-be-latched locked part 60 or the to-be-locked part side extending | stretching part 62). And this extension protrusion latches in the hollow of the construction part 5 formed extending in the wall width direction Z.
As a result, it is possible to easily perform the connecting operation and to reliably prevent the erection portion 5 from being detached.

  When the erection portion side protrusion 50 and the locked portion 60 are formed to have a substantially rectangular cross section, the tandem structure 1 allows the erection portion 5 to be connected from the outside of the groove portion S of the hat-type steel sheet pile 2 as shown in FIG. Move in the plate thickness direction X. At this time, the erection part 5 is attached to the hat-type steel sheet pile 2 from the outside of the groove part S and fixed with bolts 4 or the like. In addition, the construction part 5 may be moved from the inside of the groove part S of the hat-type steel sheet pile 2 and attached to the hat-type steel sheet pile 2 from the inside of the groove part S.

  When the erection portion side protrusion 50 and the locked portion 60 are formed in a substantially trapezoidal cross section or a substantially T cross section, the tandem structure 1 has the erection portion 5 in the wall width direction Z as shown in FIG. Move the slide. At this time, in the erection part 5, the erection part side protrusions 50 are slid and inserted between the plurality of erection parts 60, and the engagement part 60 is slid and inserted between the erection part side protrusions 50. And fixed so as not to be separated in the plate thickness direction X.

  As shown in FIG. 22, in the cascade structure 1, the locked portion 60 and the erection portion side protrusion 50 may be formed in a wedge shape. In this case, the workability when slidingly inserting the locked portion 60 between the plurality of erection portion side protrusions 50 is improved, and the frictional force between the erection portion side protrusion 50 and the locked portion 60 is improved. The detachment of the erection unit 5 can be prevented. Furthermore, the play between the protrusions is reduced, and slip deformation at the time of deformation can be reduced.

  As shown in FIGS. 23A and 23B, the cascade structure 1 is cut along a cutting line E in which the plate member 6 and the erection portion 5 on which the locked portion 60 is formed are inclined in the material axis direction Y or the like. It may be manufactured by processing or the like. At this time, in the cascade structure 1, as shown in FIG. 23C, the locked portion 60 and the erection portion side protrusion 50 are formed to be inclined in the wall width direction Z, and the erection portion 5 is moved in the wall width direction Z. By sliding, a plurality of construction portion side protrusions 50 are slid and inserted between the plurality of locked portions 60.

  The cascade structure 1 is provided with a stopper member 33 at one end in the wall width direction Z as required, and when the erection part 5 is slid in the wall width direction Z, the erection part 5 moves to the stopper member 33. It will be in contact with. At this time, in the cascade structure 1, the erected part 5 is brought into contact with the stopper member 33 while the slidable movement of the erection part 5 is facilitated by the inclination of the locked part 60 and the erection part side protrusion 50. Therefore, it is possible to prevent the erection unit 5 from falling off by preventing the erection unit 5 from sliding more than necessary.

  As shown in FIGS. 24A and 24B, the cascade structure 1 has a locked portion 60 on the side surface 3b of both end portions 3 of the first hat-type steel sheet pile 2A and the second hat-type steel sheet pile 2B as shown in FIGS. A plate member 6 on which is formed may be attached. At this time, the cascade structure 1 includes, for example, a protrusion 65 that protrudes in the material axis direction Y on the plate member 6 on the first hat-type steel sheet pile 2A side, and a plate member 6 on the second hat-type steel sheet pile 2B side. In addition, a recess 66 that is depressed in the material axis direction Y may be formed.

  24A and 24B, when the first hat-type steel sheet pile 2A and the second hat-type steel sheet pile 2B are connected to each other in the material axis direction Y, the plate member 6 on the first hat-type steel sheet pile 2A side is connected. The formed projecting portion 65 is fitted into a recessed portion 66 formed in the plate member 6 on the second hat-type steel sheet pile 2B side. As a result, the cascade structure 1 can easily position the end portions 3 of the plurality of hat-type steel sheet piles 2 in the wall width direction Z by fitting the protruding portions 65 into the recessed portions 66. Further, in the cascade structure 1, in particular, the protruding portion 65 and the recessed portion 66 are formed to be inclined in the wall width direction Z, so that the inclined surfaces of the protruding portion 65 and the recessed portion 66 serve as a guide, It becomes possible to easily carry out the fitting of the protruding portion 65 and the recessed portion 66.

  As shown in FIGS. 25A to 25C, the cascade structure 1 is locked to each other in the material axis direction Y in a state where the plurality of erection portion side protrusions 50 are slid and inserted between the plurality of locked portions 60. A frame member 55 that surrounds the erection portion side protrusion 50 and the locked portion 60 may be provided in the erection portion 5. At this time, the cascade structure 1 can prevent the erection part 5 from sliding more than necessary by sandwiching the erection part side protrusion 50 and the locked part 60 between both side parts 55a of the frame member 55. . In the cascade structure 1, the groove 54 is formed in the upper end surface 5 b of the erection portion 5 as necessary, and the upper end portion 55 b of the frame member 55 is fitted into the groove 54, so that the plate thickness of the frame member 55 is increased. The movement in the direction X is restricted, and the frame member 55 can be prevented from falling off.

  As shown in FIGS. 26A and 26B, the cascade structure 1 is formed such that the lower end surface 5a of the erection portion 5 is inclined toward the end 3 side of the hat-type steel sheet pile 2 from the upper side to the lower side in the material axis direction Y. May be. The cascade structure 1 is configured to incline the lower end surface 5a of the erection part 5 toward the end part 3 side of the hat-type steel sheet pile 2, so that the hat-type steel sheet pile 2 (the tandem hat-type steel sheet pile unit 70) connected in the erection part 5 is provided. ) Is embedded, it is possible to reduce the placement resistance received by the lower end surface 5a of the erection part 5.

  Here, the cascade structure 1 includes a bolt 4, a screw, and the like that are continuously penetrated from the installation portion 5 to the locked portion 60 or the plate member 6 on the upper end surface 5 b of the installation portion 5 or the outer surface 51 a of the flat plate portion 51. The shaft member 56 may be provided. Further, the cascade structure 1 is provided with a plate 44 in which flat steel or the like is erected from the erection part 5 to the locked part 60 or the plate member 6, and the plate 44 is fixed by screwing or the like. Good.

Further, as shown in FIGS. 27A to 27C, the cascade structure 1 is configured such that the erection portion side protrusion 50 and the locked portion 60 are partially cut out in the wall width direction Z, so that the erection portion side protrusion 50 and A cutout groove 57 a may be formed in the locked portion 60. At this time, the cascade structure 1 has a substantially square shape or the like that extends continuously in the material axis direction Y in a notch groove 57a formed by partially cutting the erection portion side protrusion 50 and the locked portion 60. The heel member 57 is fitted.
In addition, it is preferable from a viewpoint of workability that the notch groove 57a and the flange member 57 are not substantially square shapes, but are triangular shapes in which the width dimension is gradually reduced toward the distal end side.

  Thus, the cascade structure 1 is one of the frame member 55 shown in FIGS. 25A to 25C, the shaft member 56 shown in FIGS. 26A and 26B, the plate 44, and the eaves member 57 shown in FIGS. 27A to 27C. Only one may be provided as a slide prevention part, and these may be provided in combination as appropriate. Thereby, the tandem structure 1 can prevent the erection part 5 from dropping out by restraining the movement of the erection part 5 in the wall width direction Z by the slide prevention part.

  The cascade structure 1 is fixed so that the erection part 5 is not separated in the plate thickness direction X when the erection part side protrusion 50 and the locked part 60 are formed in a substantially trapezoidal cross section or a substantially T cross section. Thus, the movement of the erection part 5 in the wall width direction Z is restrained by the frame member 55 and the like, and the erection part side protrusion 50 and the locked part 60 are locked in the material axis direction Y. At this time, the cascade structure 1 prevents the installation portion 5 from falling off without using the bolt 4 that penetrates the end portion 3 of the hat-type steel sheet pile 2 in the plate thickness direction X, and the end portion 3 of the hat-type steel sheet pile 2. It is possible to improve the water stop performance of the hat-type steel sheet pile 2 as a thing which does not form an opening in the.

  In particular, as shown in FIG. 28, the cascade structure 1 has a plurality of hat-type steel sheet piles 2 connected by the erection part 5 embedded in the ground 8 or a plurality of hat-type steel sheet piles 2 in the ground 8. In the embedded state, the bending load M acts on the location where the plurality of hat-type steel sheet piles 2 are connected.

  Since the cascade structure 1 can sufficiently resist the bending load M at a location where a plurality of hat-type steel sheet piles 2 are connected, the bending rigidity and bending strength of the erected portion 5 are approximately the same as those of the hat-type steel sheet pile 2 alone. Is desirable. At this time, in the cascade structure 1, the distances e1 and e2 from the neutral axis C of the bending load M to the center of gravity of the erection part 5 are obtained by, for example, erection of the erection part 5 on the flange part 2a and the arm part 2c. The distance from the neutral shaft C to the flange portion 2a and the arm portion 2c of the hat-type steel sheet pile 2 is substantially the same.

  In the cascade structure 1, it is preferable that the dimension of the erection part 5 in the thickness direction X is smaller than the dimension of the erection part 5 in the wall width direction Z. In this case, since the distances e1 and e2 from the neutral axis C of the bending load M to the center of gravity of the erection part 5 are substantially the same as the flange part 2a and the arm part 2c of the hat-type steel sheet pile 2, it is about the same as the hat-type steel sheet pile 2 By installing the erection part 5 having the cross-sectional area, the bending rigidity and the bending strength of the erection part 5 can be made the same as those of the hat-type steel sheet pile 2 alone. Since the cascade structure 1 can sufficiently resist the bending load M at a portion where the plurality of hat-type steel sheet piles 2 are connected even with the installation portion 5 having a thickness as thin as that of the hat-type steel sheet pile 2, the installation portion 5 is light in weight. It can be made compact.

  In the cascade structure 1, in particular, the erection part 5 is erected at a position away from the neutral axis C of the bending load M, and the sectional moment of the erection part 5 is increased, so that the thickness of the erection part 5 is further increased. Even if it is made thin, it can sufficiently resist the bending load M at a location where a plurality of hat-type steel sheet piles 2 are connected. As a result, the cascade structure 1 can secure a sufficient bending rigidity at a location where a plurality of hat-type steel sheet piles 2 are connected, and at the same time, by making the construction part 5 lightweight and compact, It becomes possible to suppress the connection cost of a sheet pile.

  The cascade structure 1 can secure sufficient bending rigidity at a location where a plurality of hat-type steel sheet piles 2 are connected. Therefore, a location where a plurality of hat-type steel sheet piles 2 are connected does not become a structural weakness. It becomes possible to avoid a decrease in the bending performance of the entire cascade hat type steel sheet pile in which the hat type steel sheet pile is connected in the material axis direction Y.

  In addition, when the action direction of the bending load M is specified, the cascade structure 1 is constructed by installing the erection part 5 only on the flat surface 20 of the flange part 2a on the tension side, as shown in FIG. The amount of steel used as the erection part 5 can be suppressed.

  As shown in FIGS. 10 to 12, the cascade structure 1 is tensioned by the plurality of hat-type steel sheet piles 2 connected in the material axis direction Y being locked in the material axis direction Y by the contact surface 30. It will resist the force T. Since the bearing strength of the erection portion side protrusion 50 and the locked portion 60 required to resist the tensile force T is generally about 1.5 times higher than the tensile strength, the thickness of the hat-type steel sheet pile 2 For the dimension t ′, the height h in the plate thickness direction X of the erection part side protrusion 50 and the locked part 60 is reduced to about 70% (h = 1 / 1.5 × t ′). The part 5 can be made lighter and more compact.

  As shown in FIG. 1, the steel wall 7 includes an erection part 5 erected on the side surface 3 b of the end part 3 of the plurality of hat-type steel sheet piles 2 connected to each other in the material axis direction Y, and a plurality of hat-type steel sheet piles. It is provided with a plurality of cascade hat-type steel sheet pile units 70 connected in the material axis direction Y by the erection unit 5, and by connecting the plurality of cascade hat-type steel sheet pile units 70 in the wall width direction Z, the inside 8 of the ground It is constructed so as to extend in the wall width direction Z.

  The steel wall 7 is, in particular, a plurality of longitudinally-hatted steel sheet pile units 70 that are arranged adjacent to each other in the wall width direction Z, and the installation portion 5 of each longitudinally-hatted steel sheet pile unit 70 is in the material axis direction Y. Are arranged at different positions. At this time, the steel wall 7 is structured such that the locations where the plurality of hat-type steel sheet piles 2 are connected are arranged in a staggered manner in the wall width direction Z, etc. It is possible to avoid connecting points that may be weak points being arranged at substantially the same position in the material axis direction Y and continuing in the wall width direction Z.

  As mentioned above, although the example of embodiment of this invention was demonstrated in detail, all the embodiment mentioned above showed only the example of actualization in implementing this invention, and these are the technical aspects of this invention. The range should not be interpreted in a limited way.

  According to the present invention, at a location where a plurality of hat-type steel sheet piles are connected in the material axis direction Y, a longitudinal connection structure of a hat-type steel sheet pile that can secure sufficient bending rigidity and suppress connection costs, and a longitudinally-hatted steel sheet pile Units and steel walls can be provided.

1: Hat-type steel sheet pile cascade structure 2: Hat-type steel sheet pile 2A: First hat-type steel sheet pile 2B: Second hat-type steel sheet pile 2a: Flange portion 2b: Web portion 2c: Arm portion 2d: Joint portion 20: Flat surface 3: End portion 3a: End surface 3b: Side surface 30: Contact surface 30a: R portion 31: One end portion 32: The other end portion 33: Stopper member 4: Bolt 40: Bolt insertion hole 41: Fastening nut 42: Welding nut 43 : Female screw part 44: Plate 5: Installation part 5a: Lower end surface 5b: Upper end surface 50: Installation part side protrusion 50a: Front end side 50b of installation part side protrusion: Base end side 51 of installation part side protrusion: Flat plate part 51a: Outer surface 51b: Inner surface 52: Extension part side extension part 53: One end face 54 of the extension part side extension part: Groove 55: Frame member 55a: Both side parts 55b of the frame member: Upper end part 56 of the frame member: Shaft member 57: Gutter member 57a Notch groove 6: Plate member 60: Locked portion 60a: Locked portion distal end side 60b: Locked portion base end side 62: Locked portion side extending portion 63: Locked portion one end surface 65 : Protruding part 66: Recessed part 7: Steel wall 70: Cascaded hat type steel sheet pile unit 8: Ground X: Plate thickness direction Y: Material axis direction Z: Wall width direction

Claims (10)

It is a cascade structure of a hat-type steel sheet pile in which the first hat-type steel sheet pile and the second hat-type steel sheet pile are abutted and connected to each other in the end surfaces in the material axis direction,
A first locked portion protruding outward from a side surface of the first hat-type steel sheet pile;
An installation portion provided on a side surface of the second hat-type steel sheet pile and locking in the material axis direction with respect to the first locked portion of the first hat-type steel sheet pile;
A cascading structure of hat-type steel sheet piles. A second locked portion that protrudes outward from the side surface of the second hat-type steel sheet pile;
In addition to the first locked portion, the erected portion is also locked to the second locked portion;
The cascade structure of a hat-type steel sheet pile according to claim 1. The end face of the first hat-type steel sheet pile and the end face of the first locked portion are flush with each other;
The end face of the second hat-type steel sheet pile and the end face of the second locked portion are flush with each other;
The cascade structure of the hat-type steel sheet pile according to claim 2. The first locked portion has an extending protrusion extending in the material axis direction on the tip side thereof,
The erection portion has a recess extending in a wall width direction perpendicular to the material axis direction and a plate thickness direction of the first hat-type steel sheet pile and engaging with the extension protrusion. The cascade structure of the hat-type steel sheet pile as described in any one of 1-3. The longitudinal connection structure of the hat-type steel sheet pile according to claim 4, further comprising a slide preventing portion that restrains relative movement in the wall width direction between the erected portion and the first locked portion. The said 1st to-be-latched part is spaced apart from each other along the said material-axis direction, and is provided in multiple numbers, The cascade structure of the hat-type steel sheet pile as described in any one of Claims 1-5 characterized by the above-mentioned. . The said 1st to-be-latched part is integrally provided with respect to the common base material, The cascade structure of the hat-type steel sheet pile of Claim 6 characterized by the above-mentioned. The cross-sectional area when the portion of the erection part excluding the locking part with the first locked part is viewed in a cross section perpendicular to the material axis direction is the first hat-type steel sheet pile and the second The cascade structure of a hat-type steel sheet pile according to any one of claims 1 to 7, which is the largest at a butting position between the hat-type steel sheet piles. It has the cascade structure of the hat-type steel sheet pile as described in any one of Claims 1-8, The cascade hat-type steel sheet pile unit characterized by the above-mentioned. A steel wall in which a plurality of the cascade hat-type steel sheet pile units according to claim 9 are continuously provided in a wall width direction perpendicular to the material axis direction and the plate thickness direction of the first hat-type steel sheet pile,
A steel wall characterized in that the erected portions of each of the cascade hat-type steel sheet pile units adjacent to each other in the wall width direction are arranged at different positions in the material axis direction.

Images