JP2013174104A - U-shaped steel sheet pile and structure using u-shaped steel sheet pile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a U-shaped steel sheet pile in which the movement rotation angle of the joint of a U-shaped steel sheet pile is largely set, and a structure such as a steel sheet pile wall having a corner section is constructed, and a structure using the same.SOLUTION: In a U-shaped steel sheet pile, a cross section is formed so as to be almost U-shaped, and joints configured such that the ends of a sheet pile body are formed of raised sections 1b and 1c and outer claws 3 and 4 are installed in a protruding manner, and adjacent steel sheet piles are configured such that the directions of the cross-sections are symmetrically aligned so as to be connected. Furthermore, the next conditions are satisfied; (A) a space part k1 constituted of the raised section 1b and the outer claw 3 with respect to a rising angle αof one U-shaped steel sheet pile is larger than a space part k2 constituted of the raised section 1c and the outer claw 4 with respect to the rising angle αof the other U-shaped steel shape pile, (B): thickness T1 of the outer claw 3 with respect to the rising angle αof one U-shaped steel sheet pile is larger than the space k2 constituted of the raised section 1c and the outer claw 4 with respect to the rising angle αof the other U-shaped steel sheet pile, and (C): the outer claw 3 and the outer claw 4 of the U-shaped steel sheet piles are brought into contact with each other, and the outer claw 3 of one U-shaped steel sheet pile is brought into contact with the raised section 1c of the other U-shaped steel sheet pile.

Description

  The present invention mainly relates to a U-shaped steel sheet pile used for construction of structures such as earth retaining for civil engineering / architecture, underground walls, deadlines or seismic reinforcement of existing structures, and a structure constructed using the U-shaped steel sheet pile. It is about.

  In general, structures such as earth retaining for civil engineering / architecture and underground walls are constructed by engaging a plurality of steel sheet piles with U-shaped or linear cross sections and engaging joints provided at both ends of each steel sheet pile. Constructed by placing continuously.

  By the way, since steel sheet piles are generally constructed in a straight line in the sheet pile driving direction, the joints between the steel sheet piles have only a clearance that can absorb bendability and bending of the product, and each steel sheet pile is detached. When moving in the direction, the shape is such that three points of the claws provided in the joint of each steel sheet pile contact.

  For example, as shown in FIGS. 9 (a) and 9 (b), a conventional U-shaped steel sheet pile has a substantially U-shaped cross section and a pair of joints 2, 2 at both ends in the sheet pile driving direction. Are projecting symmetrically. The joint 2 is formed in a tapered shape by rising portions 1b and 1c that respectively form end portions of the sheet pile main body 1a and outer claws 3 and 4 that protrude from the tips of the rising portions 1b and 1c, respectively. .

  In particular, since the steel sheet pile is not assumed to be constructed by rotating, the nominal rotation angle α of the joint coupling position of each steel sheet pile is 6 degrees, and the actual maximum rotation angle is 10 degrees or less ( (See Figure 10).

  The adjacent U-shaped steel sheet piles 1 are driven adjacent to each other in the sheet pile driving direction with the orientation of the cross-sectional shape alternately arranged symmetrically as shown, and the joints 2 are coupled to each other. The joints 2 are in contact at three points (a), (b) and (c) when the steel sheet piles are moved in the direction in which they are separated.

Japanese Patent No. 4333308 JP 2006-63521 A Japanese Patent No. 4879642

  When constructing structures such as earth retainings and underground walls for civil engineering and construction, use a modified sheet pile when the shape of the sheet pile placement direction is a curved shape or when a corner that is continuous at a substantially right angle is provided. It was necessary, and there were problems in terms of cost and delivery time.

  Moreover, because of the clearance considering only the straight driving, the driving performance is poor, which causes a construction trouble. Furthermore, when the clearance of the contact portion is increased gradually to solve these problems, there is a drawback that the joint portion is easily detached.

  Although Patent Documents 1 and 2 describe the joint shape of the U-shaped steel sheet pile, since the dimensions of the space between the rising part and the claw part are the same on the left and right, a large rotation angle cannot be obtained. Absent. Further, as shown in Patent Document 2, when the size of the claw is reduced, the strength of the claw portion is reduced, so that the strength of the joint is also reduced. Patent Document 3 describes U-shaped steel sheet piles having different claw shapes on the left and right sides, but the joint space width is different as a result of changing the projection height, and the space width is different from the conventional one. It is described that the intensity does not change because it does not change greatly. From this description, it is considered desirable that the difference in space width is smaller. In addition, the purpose is to increase the nail height and secure a space for inserting a water-stopping material, etc., not to obtain a large rotation angle at the joint, but to assume that the sheet pile is driven straight. doing.

  The present invention has been made to solve the above-described problems. By newly giving a condition that the joint is not detached from the U-shaped steel sheet pile, and by increasing the gap between the joints under this condition, the U Provides a U-shaped steel sheet pile and a structure using a U-shaped steel sheet pile that can increase the rotation angle of movement at the joint of a steel sheet pile, thereby enabling the construction of a curved sheet or a steel sheet pile wall that is continuous at a substantially right angle. It is intended to do.

  In the invention according to claim 1 of the present application, as shown in FIGS. 1 and 2, the cross section is formed in a substantially U shape, and the rising ends of the sheet pile main body 1 a are respectively formed at both ends in the sheet pile placing direction. Provided with a pair of tapered joints 2 and 2 respectively formed by outer claws 3 and 4 projecting from the ends of the rising portions 1b and 1c, respectively. In the U-shaped steel sheet pile that can be connected in the sheet pile driving direction by alternately aligning the direction of the cross-sectional shape by the combination of, it is formed so as to satisfy the following conditions: is there.

(A). Space k1 formed by the rising portion 1b and the outer claw 3 against rising angle alpha ₁ of one of the U-shaped steel sheet pile 1 of the rising portion 1b of the U-shaped steel sheet pile 1, 1 to be adjacent the other U-shaped steel larger than the space portion k2 formed by the rising portion 1c and the outer arm 4 with respect to the rising angle alpha ₁ of the rising portion 1c of the sheet pile 1 (condition a; see FIG. 2 (a)).

(B). Rise adjacent thickness T1 of the outer claw 3 against the rising angle alpha ₁ of one of the U-shaped steel sheet pile 1 of the rising portion 1b of the U-shaped steel sheet pile 1, 1, the other U-shaped steel sheet pile 1 of the rising portion 1c larger than the space portion k2 formed by the rising portion 1c and the outer arm 4 with respect to the angle alpha ₁ (condition B; see Figure 2 (b)).

(C). The outer claw 3 and the outer claw 4 of the adjacent U-shaped steel sheet piles 1 and 1 are in contact with each other, and the outer claw 3 of one U-shaped steel sheet pile 1 and the rising portion 1c of the other U-shaped steel sheet pile 1 are in contact with each other. (Condition C; see FIG. 2 (c)).

  In the present invention, as shown in the drawing, a plurality of U-shaped steel sheet piles 1, 1 which are arranged adjacent to each other in the sheet pile driving direction with the orientation of the cross-sectional shape alternately arranged symmetrically and to which the joints 2 are coupled, Even if it moves in the direction of detachment, the outer claw 3 and the outer claw 4 of the adjacent U-shaped steel sheet piles 1 and 1 come into contact with each other, and the rising portion 1b of one U-shaped steel sheet pile 1 and the other U-shaped steel sheet pile 1 outside When the claw 3 comes into contact with each other, and there is a gap between the rising portion 1b of one U-shaped steel sheet pile 1 of the adjacent U-shaped steel sheet piles 1 and 1 and the outer claw 4 of the other U-shaped steel sheet pile 1, Since the portion 1b becomes a replacement rod for the outer claw 4 and the rotation is not spoiled, the movement (rotation angle) of the U-shaped steel sheet pile 1 at the joint is large, and the rising portion 1b and the outer claw 4 are in contact with each other. It can rotate smoothly without leaving.

  Further, if the joints 2 are joined by the two-point contact of (b) and (c), the shielding effect of the joint part is maintained, and a steel sheet pile wall or the like that continues in a curved shape in the sheet pile driving direction ( Structure).

  Further, when the adjacent U-shaped steel sheet piles 1 and 1 are rotated and there is no gap between the rising portion 1b and the outer claw 4, the rising portion 1c and the outer claw 3, the outer claw 3 and the outer claw 4, and the rising portion 1b When the outer claws 4 are brought into contact with each other, three-point contact (a), (b), and (c) is achieved, and stronger coupling and shielding are possible.

  That is, in the present invention, by satisfying the condition (B), the joints 2 of the adjacent U-shaped steel sheet piles 1 and 1 are not separated even if they are linearly connected in the sheet pile driving direction. Moreover, when the condition (C) is satisfied, the joints 2 are rotated by being joined by two-point contact, but when the condition (A) is satisfied, the rising portion 1b and the outer claw 4 are not in contact with each other. When the conditions (A) and (C) are satisfied, the joint 2 can be coupled and rotated by the two-point contact of (b) and (c).

  In addition, if the joints 2 are joined by the two-point contact of (b) and (c), the shielding effect of the joint part is maintained and the steel sheet pile wall (structure) that continues in a curved shape in the sheet pile placement direction Body). Furthermore, if there is no gap between the rising portion 1b and the outer claw 4 due to the rotation of the joint portion, the rising portion 1c and the outer claw 3, the outer claw 3 and the outer claw 4, and the rising portion 1b and the outer claw 4 are in contact with each other. By doing so, it becomes a three-point contact of (a), (b), (c), and stronger coupling and shielding become possible.

The invention according to claim 2 of the present application is the invention according to claim 1, wherein an angle obtained by adding a moving rotation angle α ₂ of the other U-shaped steel sheet pile 1 to the rising angle α ₁ of the rising portion 1 b of one U-shaped steel sheet pile 1. (α _{1 +} α ₂₎ the thickness T2 of the outer arm 4 with respect to, greater than the space portion k1 formed by the rising portion 1b and the outer claw 3 against rising angle alpha ₁ of one of the U-shaped steel sheet pile 1 of the rising portion 1b formed (Condition (D); see FIGS. 3 (a) and 3 (b)). According to the present invention, even if the joint portion of the adjacent U-shaped steel sheet piles 1 and 1 is rotated by α ₂ degrees, the joint does not come off.

  The U-shaped steel sheet pile according to claim 3 of the present application is the U-shaped steel sheet pile according to claim 1 or 2, wherein the rising portion 1b and the outer claw 3 form one end portion of the steel sheet pile main body 1a at both ends of one steel sheet pile main body 1a. And a joint 2 formed by a rising portion 1c that forms the other end of the steel sheet pile main body 1a and an outer claw 4 at both ends of the other steel sheet pile main body 1a. It is characterized by.

  In the present invention, a single U-shaped steel sheet pile is provided with a pair of joints 2 and 2 each having an outer claw 3 and an outer claw 4, thereby constructing a structure such as a steel sheet pile wall with one type of steel sheet pile. In particular, the cost merit by using a single U-shaped steel sheet pile during construction is extremely large.

  The U-shaped steel sheet pile according to claim 4 of the present application is the U-shaped steel sheet pile according to claim 1 or 2, and rising portions 1b, 1c and outer claws respectively forming both end portions of the steel sheet pile main body 1a at both ends of the steel sheet pile main body 1a. The joints 2 and 2 respectively formed by 3 and 3 are projected.

  In the present invention, since the single U-shaped steel sheet pile is provided with the joints 2 and 2 having the same shape having the outer claw 3 or the outer claw 4, the shape of the joint becomes the same, and the cost merit particularly in manufacturing is extremely high. large.

  As shown in FIGS. 8 (a) and 8 (b), the invention according to claim 5 of the present application has a plurality of U-shaped steel sheet piles 1 according to any one of claims 1 to 4 and the direction of the cross-sectional shape. It is constructed by alternately arranging symmetrically and connecting the joints 2 of adjacent U-shaped steel sheet piles 1 and 1 and continuously installing them in the sheet pile driving direction.

  In the present invention, since the movement (rotation angle) of the U-shaped steel sheet piles 1 and 1 in the joint portion is large, the joint portion can rotate smoothly without being detached until the rising portion 1b and the outer claw 4 come into contact with each other. Therefore, the corner part of the steel sheet pile wall which continues in a curved shape in the placing direction of the U-shaped steel sheet pile or the steel sheet pile wall which continues substantially at right angles can be easily constructed without using a specially shaped sheet pile. At that time, the U-shaped steel sheet pile 1 including the joints 2 and 2 having one or both of the outer claws 3 and the outer claws 4 can be arbitrarily used.

  In particular, the present invention provides a new condition for the joint to be removed from the joint formed at both ends of the U-shaped steel sheet pile, and the joint clearance is expanded under this condition. The moving rotation angle of the U-shaped steel sheet pile at the portion can be increased, and a steel sheet pile wall that is continuous in a curved shape or a corner portion of a steel sheet pile wall that is continuous substantially at right angles can be easily constructed.

1 shows an embodiment of a U-shaped steel sheet pile according to the present invention, FIG. (A) is a cross-sectional view of a plurality of U-shaped steel sheet piles placed adjacent to each other in the sheet pile placing direction, and FIG. FIG. 4 is an enlarged view of a portion in FIG. FIGS. (A) and (b) are cross-sectional views showing the shape of the joint, and FIG. (C) is a cross-sectional view showing a state in which the joints are coupled to each other. Fig. (A) is a cross-sectional view showing the shape of the joint, and Fig. (B) is a cross-sectional view of the joint portion showing the rotation state of the joint. Figures (a), (b), and (c) are cross-sectional views showing the coupling state of the joint. It is a cross-sectional view showing one embodiment of a U-shaped steel sheet pile according to the present invention. It is a cross-sectional view showing one embodiment of a U-shaped steel sheet pile according to the present invention. FIG. 7 is a cross-sectional view showing a state in which the U-shaped steel sheet piles shown in FIGS. 5 and 6 are connected. FIGS. 1A and 1B are cross-sectional views of a steel sheet pile wall (structure) constructed using the U-shaped steel sheet pile according to the present invention. A conventional U-shaped steel sheet pile is shown, FIG. (A) is a cross-sectional view of a plurality of U-shaped steel sheet piles placed adjacent to each other in the sheet pile driving direction, and FIG. (B) shows a joint portion of adjacent U-shaped steel sheet piles. FIG. 3 is an enlarged view of a portion in FIG. (a), (b) is a cross-sectional view which shows the coupling | bonding state of the coupling of the conventional U-shaped steel sheet pile.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a U-shaped steel sheet pile according to the present invention and a structure constructed using the U-shaped steel sheet pile will be described in detail with reference to the accompanying drawings.

  1 to 7 show an embodiment of a U-shaped steel sheet pile according to the present invention having joints at both ends, and FIG. 1 (a) shows a plurality of U-shaped steel sheet piles placed adjacent to the sheet pile placing direction. Fig. 1 (b) is an enlarged view of the part A in Fig. 1 (a) showing a joint portion of adjacent U-shaped steel sheet piles.

  2 (a) and 2 (b) are cross-sectional views showing the shape of the joint, and FIG. 2 (c) is a cross-sectional view showing the joined state of the joint.

  In the figure, the U-shaped steel sheet pile 1 has a substantially U-shaped cross section, and a pair of joints 2 and 2 project from both ends in the sheet pile driving direction. Further, the U-shaped steel sheet piles 1 are alternately arranged symmetrically in the direction of the cross-sectional shape so as to be adjacent to each other in the sheet pile placing direction, and are connected to each other by coupling of the joints 2.

  The joint 2 is formed in a tapered shape by rising portions 1b and 1c that respectively form end portions of the steel sheet pile main body 1a and outer claws 3 and 4 that protrude from the tips of the rising portions 1b and 1c, respectively. Yes.

  Each of the outer claws 3 and 4 has a substantially half-moon cross section, and flanges (joint bottoms) 1d and 1d formed at the tips of the rising portions 1b and 1c, respectively, substantially parallel to the sheet pile driving direction. Each of the tips protrudes obliquely at an angle that intersects the sheet pile driving direction.

Further, the space portion k1 formed by the rising portion 1b and the outer claw 3 against rising angle alpha ₁ of one of the U-shaped steel sheet pile 1 of the rising portion 1b, the rising angle of the other U-shaped steel sheet pile 1 of the rising portion 1c alpha ₁ Is larger than the space k2 formed by the rising portion 1c and the outer claw 4 (condition A; see FIG. 2 (a)).

The thickness T1 of the outer claw 3 against rising angle alpha ₁ of one of the U-shaped steel sheet pile 1 of the rising portion 1b, the rising portion 1c and the outer arm 4 with respect to the rising angle alpha ₁ of the other U-shaped steel sheet pile 1 of the rising portion 1c Are formed larger than the space k2 formed by (Condition B; see FIG. 2 (b)).

  Furthermore, the outer claw 3 and the outer claw 4 of the adjacent U-shaped steel sheet piles 1 and 1 are in contact with each other, and the outer claw 3 of one U-shaped steel sheet pile 1 of the adjacent U-shaped steel sheet piles 1 and 1 and the other U-shaped steel sheet pile 1. Are formed so as to be in contact with each other (condition C; see FIG. 2 (c)).

  By being configured in this way, satisfying the condition (B) does not cause the joint portion to be disengaged even if the adjacent U-shaped steel sheet piles 1 and 1 move in the disengagement direction.

  In addition, when the condition (C) is satisfied, the joints 2 are coupled and rotated by two-point contact, but when the condition (A) is satisfied, the rising portion 1b and the outer claw 4 do not come into contact with each other. By satisfying A) and condition (C), the joints 2 are coupled and rotated by two-point contact.

  Also, if the joints 2 are joined by two-point contact, the shielding effect of the joint part is maintained, and the steel sheet pile wall (structure) that continues in a curved shape in the sheet pile placement direction by being rotatable, It is possible to construct a corner portion of a steel sheet pile wall continuous at a right angle.

  Furthermore, if the U-shaped steel sheet piles 1 and 1 are rotated and there is no gap between the rising portion 1b and the outer claw 4, the rising portion 1b and the outer claw 4, the outer claw 3 and the outer claw 4, and the rising portion 1c and the outer claw. By making contact with 3 respectively, the joint portion comes into contact at three points (a), (b), and (c), thereby enabling strong coupling and shielding.

Further, the thickness T2 of the outer claw 4 with respect to an angle (α ₁ + α ₂ ) obtained by adding the moving rotation angle α ₂ of the other U-shaped steel sheet pile 1 to the rising angle α ₁ of the rising portion 1b of one U-shaped steel sheet pile 1 is by being larger than the space portion k1 formed by the rising portion 1b and the outer claw 3 against rising angle alpha ₁ of one of the U-shaped steel sheet pile 1 of the rising portion 1b (condition (D); Fig. 3 (a ), see (b)), even if the adjacent U-shaped steel sheet piles 1 and 1 rotate α ₂ degrees, the joint does not come off.

  4 (a) to 4 (c), in the embodiment shown in FIGS. 1 to 3, the adjacent U-shaped steel sheet piles 1 and 1 are respectively connected by rotating 180 degrees (see FIG. 4 (a)), FIG. 4 illustrates a state in which the left and right are reversed and connected (see FIG. 4B), and the left and right are further rotated 180 degrees and connected (see FIG. 4C). Although these aspects differ in the cross-sectional form of a joint part by the construction aspect of a U-shaped steel sheet pile, it does not differ especially on a structure.

  5 (a) and 5 (b) show an embodiment of a U-shaped steel sheet pile according to the present invention. The U-shaped steel sheet pile 1 is formed by rising portions 1b and outer claws 3 at both ends of a sheet pile main body 1a. The joint 2 is formed with a joint 2 formed by the rising portion 1c and the outer claw 4 respectively.

  6 (a) and 6 (b) show an embodiment of a U-shaped steel sheet pile according to the present invention. The U-shaped steel sheet pile 1 has a rising portion 1b, an outer claw 3 and one end at one end of a steel sheet pile main body 1a. And the joint 2 formed by the rising portion 1c and the outer claw 4 at the other end of the steel sheet pile main body 1a.

  In short, FIGS. 5 (a) and 5 (b) show U-shaped steel sheet piles having joints 2 and 2 of the same shape on the left and right, and FIGS. 6 (a) and 6 (b) show joints 2 of different shapes on the left and right. , 2 shows a U-shaped steel sheet pile.

  7 (a) and 7 (b) show a state in which the U-shaped steel sheet piles shown in FIGS. 5 and 6 are alternately arranged in a symmetrical manner in the cross-sectional shape and the joints 2 are connected to each other. The U-shaped steel sheet piles 1 and 1 can be greatly rotated at the joint portion even when the U-shaped steel sheet pile illustrated in any case is used.

  In particular, the U-shaped steel sheet pile illustrated in FIGS. 6A and 6B is formed with a joint 2 having an outer claw 3 on one end side of a joint body 1a and a joint 2 having an outer claw 4 on the other end side. Since it is possible to construct a structure such as a steel sheet pile wall by one type, the cost merit by using a single U-type steel sheet pile during construction is extremely large.

  8 (a) and 8 (b) are steel sheet pile walls (structures) constructed using the U-shaped steel sheet pile according to the present invention. The steel sheet pile wall shown in FIG. 8 (a) is shown in FIG. It is constructed by arranging the U-shaped steel sheet piles 1 shown in a) and (b) alternately in the direction of the cross-sectional shape symmetrically and driving in the sheet pile driving direction while joining the joints 2 together. Yes.

  Further, the steel sheet pile wall shown in FIG. 8 (b) has a plurality of U-shaped steel sheet piles 1 shown in FIG. 5 and FIG. However, it is constructed by driving in the sheet pile driving direction.

  In the embodiment, in order to facilitate understanding of the contents, the “one rising portion 1b” and the “other joint portion 1c” are described separately, but the rising portion is not specified by this.

  In the present invention, a condition that the joint is not removed is newly given to the joint formed at both ends of the U-shaped steel sheet pile, and the clearance of the joint is expanded under this condition. The rotation angle of the U-shaped steel sheet pile at the joint can be increased, and this makes it easy to use the curved sheet-shaped steel sheet pile wall and the corner section of the steel sheet pile wall that runs almost at right angles without using specially shaped sheet piles. Can be built.

α ₁ U-shaped steel sheet pile rising angle α ₂ U-shaped steel sheet pile moving rotation angle 1 U-shaped steel sheet pile 2 Joint 3 Outer claw 4 Outer claw

Claims (5)

Rising sections (1b), (1c) each having a substantially U-shaped cross section and forming ends of the sheet pile main body (1a) at both ends in the sheet pile driving direction, and the rising sections (1b), ( 1c) includes a pair of tapered joints (2) and (2) formed by outer claws (3) and (4) respectively protruding from the tips of the joints, and the joints (2) In the U-shaped steel sheet pile that can be connected in the sheet pile driving direction by alternately aligning the direction of the cross-sectional shape by the coupling of the U-shaped steel, the U-shaped steel is formed so as to satisfy the following conditions Sheet pile.
(A). Rising portion (1b) and outer claw (3) with respect to the rising angle (α ₁ ) of the rising portion (1b) of one U-shaped steel sheet pile (1) in adjacent U-shaped steel sheet piles (1), (1) Is formed by the rising portion (1c) and the outer claw (4) with respect to the rising angle (α ₁ ) of the rising portion (1c) of the other U-shaped steel sheet pile (1). Greater than space (k2)
(B). Thickness (T1) of outer claw (3) with respect to rising angle (α ₁ ) of rising portion (1b) of one U-shaped steel sheet pile (1) in adjacent U-shaped steel sheet piles (1), (1) Is larger than the space (k2) formed by the rising part (1c) and the outer claw (4) with respect to the rising angle (α ₁ ) of the rising part (1c) of the other U-shaped steel sheet pile (1)
(C). Adjacent U-shaped steel sheet piles (1), (1) outer claws (3) and outer claws (4) are in contact, and one U-shaped steel sheet pile (1) outer claws (3) and the other U-shaped steel sheet pile The rising part (1c) of (1) is in contact The U-shaped steel sheet pile according to claim 1, wherein the rising angle (α ₁ ) of the rising portion (1b) of one U-shaped steel sheet pile (1) is the rotational angle (α ₂ ) of the other U-shaped steel sheet pile (1). The thickness (T2) of the outer claw (4) with respect to the added angle (α ₁ + α ₂ ) is the rising portion (1b) with respect to the rising angle (α ₁ ) of the rising portion (1b) of one U-shaped steel sheet pile (1). And a U-shaped steel sheet pile characterized by being formed larger than the space (k1) formed by the outer claw (3).   The U-shaped steel sheet pile according to claim 1 or 2, wherein the joint is formed by a rising portion (1b) that forms one end of the steel sheet pile main body (1a) at one end of the steel sheet pile main body (1a) and an outer claw (3). (2) is projected and a joint (2) formed by a rising portion (1c) and an outer claw (4) forming the other end of the steel sheet pile main body (1a) at the other end of the steel sheet pile main body (1a). ) Projecting, a U-shaped steel sheet pile.   The U-shaped steel sheet pile according to claim 1 or 2, wherein the rising portions (1b), (1c) and the outer claws (3), which respectively form both ends of the steel sheet pile main body (1a) at both ends of the steel sheet pile main body (1a), A U-shaped steel sheet pile characterized by projecting joints (2) and (2) respectively formed by (4).   A plurality of U-shaped steel sheet piles (1) according to any one of claims 1 to 4, a plurality of U-shaped steel sheet piles (1) and (1) joints ( 2) A structure that is constructed by connecting two pieces together and continuously installing them in the sheet pile driving direction.

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