JP2013011081A - High-rigidity steel sheet pile and wall body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a steel sheet pile having a high-rigidity channel-section member, and to provide a wall body using the same.SOLUTION: The steel sheet pile includes webs 9 on both sides and a flange 10 to form a groove. On each web, an arm part 19 is integrally and continuously provided. On each arm part 19, a joint 12 is integrally formed to form a grooved steel sheet pile 4. A channel-section member 3 is formed having a front face plate 3a integrally connecting both-side face plates 14 spaced from each other. In a predetermined range L in the longitudinal direction of the grooved steel sheet pile 4, the other end of each side face plate 14 is fixed to the surface of the grooved steel sheet pile 4 over a length corresponding to the predetermined range L with means such as welding. The grooved steel sheet pile 4 and the channel-section member 3 form a space part 5. Both ends of the front face plate 3a are disposed different distances R from a line segment C between the center axes of the joints of the grooved steel sheet pile 4.

Description

  The present invention relates to a steel sheet pile used for water structures such as harbor steel structures, and land structures such as retaining walls and retaining walls, and more particularly to a highly rigid steel sheet pile having increased rigidity and a wall body using the same.

  Conventionally, as shown in FIG. 10, webs 9 that are inclined so as to spread outward are integrally connected to both end portions of the flange 10, and arm portions 19, 19 are integrated with each web 9 in parallel with the flange 10. The hat-shaped steel sheet pile 2 having a cross-sectional hat shape in which the joint 12 is integrally formed at the end of each arm portion 19, 19, and the water-side side of the arm portion 19 in the hat-shaped steel sheet pile 2. It is known that a steel sheet pile 81 having a steel cover is constituted by fixing a belt-like steel plate 141 for attachment in the steel cover material 31 at a right angle to the arm portion 19 in the width direction intermediate portion on the outer surface and fixing by welding. In addition, it is also known that the wall body 161 is configured by engaging the joints of the steel sheet piles 81 having the steel cover as described above and driving them on the water ground (see, for example, Patent Document 1). .

  In the hat-shaped steel sheet pile 2, as shown in FIG. 11, the left and right joints 12 in the hat-shaped steel sheet pile 2 are point-symmetric joints 12 with respect to the center point of the central axis of the arm portions 19, 19. When the joints 12 of the adjacent hat-shaped steel sheet piles 2 are fitted, the hat-shaped steel sheet pile 2 can be disposed on the central axis of the arm portion. It is set as the hat-shaped steel sheet pile 2 provided with the latching claw part. In the conventional form, it can coat | cover with the steel cover material 31 and can aim at rust prevention to the arm part intermediate part of the hat-shaped steel sheet pile 2 as a grooved steel sheet pile.

In the conventional case, the following effects (1) to (4) can be exhibited.
(1) Since a steel cover material is provided in advance on the grooved steel sheet pile, the concentrated corrosion site in the grooved steel sheet pile can be protected by the steel cover material, and the concentrated corrosion of the grooved steel sheet pile itself. Can be avoided.
(2) Since steel cover material is used, mechanical damage is less likely to occur even if driftwood or ice sheets collide.
(3) Since a steel cover can be attached to a grooved steel sheet pile in advance at a factory or the like, an inexpensive grooved steel sheet pile can be obtained.
(4) In the steel cover material, when the corrosion of the concentrated corrosion portion has progressed, the function as the steel cover material can be easily recovered simply by welding the steel plate so as to cover the portion.

JP 2009-102906 A

Port Steel Structure Corrosion Prevention and Repair Manual (Revised), April 1997, Center for Coastal Development Technology, p83-108 Port Steel Structure Corrosion Prevention and Repair Manual (Revised), April 1997, Center for Coastal Development Technology, p13-17

In the case of the steel sheet pile 81 having the conventional steel cover, since the mounting strip steel plates 141 having the same width and narrow width are used and installed in the same direction, the following (1), (2 ) (1) The grooved steel sheet pile 4 and the steel cover are arranged in the same direction in the wall construction direction (the joint central axis C direction). For this reason, the center-of-gravity position of each cross-section is close (the center-to-center separation distance is small), and the cross-section performance as a composite cross-section is installed in the same direction using narrow and wide sections, and the grooved steel sheet pile 4 Compared to the case where the left and right ends of the steel cover are arranged in a non-identical direction by shifting or tilting the front and rear positions with respect to the wall thickness direction in the wall construction direction (direction of joint central axis C). Small. Further, since the cross-sectional secondary moment is proportional to the cube of the distance from the central axis, the cross-sectional secondary moment increases when the same member is inclined with respect to the joint central axis C. (2) When the grooved steel sheet pile is a hat-shaped steel sheet pile, (a) the strip-shaped steel sheet for mounting (the spacing member) is fixed to the arm portion. For this reason, the steel surface is exposed in the joint and the vicinity thereof, and the corrosion progresses as it is, leading to a reduction in the cross-sectional performance. (B) As the steel cover, a steel plate having a hat-shaped cross section having no joints, which is obtained by cutting both side joints of a hat-shaped steel sheet pile, is used. For this reason, there is also a problem that the rigidity is reduced by an amount corresponding to the cut joint, which increases the cutting cost of the joint and the correction cost of the generated strain accompanying the cutting. Moreover, since the outer surface on the water area side between the joints of the adjacent hat-shaped steel sheet piles 2 is exposed in the inner part of the groove formed by the cover material, the joint fitting part of the adjacent hat-shaped steel sheet piles 2 is exposed. There is also a problem that the outer surface of the joint may cause a decrease in rigidity due to corrosion in both joints.
An object of this invention is to provide the steel sheet pile which has a groove-shaped cross-section member which improved rigidity, and a wall body using the same.

  In the steel sheet pile having the groove-shaped cross-sectional member of the first invention, the steel sheet pile includes grooves formed by the webs (9) on both sides and the flange (10) integrally connecting these webs (9). 9) is integrally provided with arm portions (19), and joints (12) are integrally formed at the end portions of the arm portions (19) to form grooved steel sheet piles (4). A groove-shaped cross-section member (3) having a side plate (14) on both sides and a front plate (3a) for integrally connecting these side plates (14) is formed, and the grooved steel sheet pile (4) The surface of the grooved steel sheet pile (4) has a length corresponding to the predetermined range (L) in the longitudinal direction and the other end of each side plate (14) is welded or the like. A space (5) is formed by the grooved steel sheet pile (4) and the groove-shaped cross-section member (3). Both ends of the front plate (3a) are arranged with a difference in distance (R) from the line segment connecting the central axes of the joints (12) of the grooved steel sheet pile (4), and the grooved steel sheet pile ( When the wall body (27) is formed by fitting the joints in 4), the end portions of the adjacent front plates (3a) can be arranged to be shifted in and out of the wall thickness direction. Features.

  Moreover, in 2nd invention, in the steel sheet pile which has the groove-shaped cross-section member of 1st invention, the said front plate (3a) is inclinedly arranged with respect to the steel sheet pile (4) with a groove | channel by planar view. Features.

  In 3rd invention, the steel sheet pile which has the groove-shaped cross-section member of 1st invention or 2nd invention WHEREIN: As for the said front plate (3a), the steel sheet pile of the same cross-sectional form as the said steel sheet pile (4) with a groove | channel is used. It is characterized by being.

  In 4th invention, the steel sheet pile which has the groove-shaped cross-section member in any one of 1st invention-3rd invention WHEREIN: One side surface plate (14) in the said groove-shaped cross-section member (3) is the said steel sheet pile with a groove | channel ( 4) The joint (2) is fixed to the outer surface by a fixing means such as welding.

  In the steel sheet pile having the groove-shaped cross-section member of the fifth invention, in the steel sheet pile having the groove-shaped cross-section member of any one of the first to fourth inventions, at least the lower end portion of the space portion (5) is grooved steel. A closing plate (6) fixed to one or both of the sheet pile (4) and the groove-shaped cross-sectional member (3) is provided and closed.

  In the steel sheet pile having the groove-shaped cross-section member of the sixth invention, in the steel sheet pile having the groove-shaped cross-section member of any of the first to fifth inventions, a slit (28) is provided at a predetermined position of the grooved steel sheet pile (4). The locking steel plate (29) is fixed to the space (5) side surface of the front plate (3a) at a position corresponding to the slit (28) by means of welding or the like, and the locking steel plate ( 29) is inserted into the slit (28), and the end of the locking steel plate (29) is fixed to the grooved steel sheet pile (4) by means such as welding.

  In the steel sheet pile having the groove-shaped cross-section member of the seventh invention, in the steel sheet pile having the groove-shaped cross-section member of any of the first to fifth inventions, an opening (30) is formed at a predetermined position of the front plate (3a). The rod-shaped member (32) is fixed to the portion corresponding to the opening (30) on the space (5) side surface of the grooved steel sheet pile (4) by means such as welding. Is inserted into the opening (30), and the end of the rod-like member (32) is fixed to the front plate (3a) by means such as welding or screwing with a nut.

  In the steel sheet pile having the groove-shaped cross-section member of the eighth invention, in the steel sheet pile having the groove-shaped cross-section member of any one of the first to seventh inventions, the grooved steel sheet pile (4) and the front plate (3a) are provided. In addition, in any one or both of the upper part and the lower part, a spacing member (26) made of a steel plate or the like is fixed by means such as welding.

  In the wall of 9th invention, the steel sheet pile which has the groove-shaped cross-section member in any one of 1st invention-8th invention is arrange | positioned independently, or the groove | channel of any one of Claims 1-8. A steel sheet pile not having at least one groove-shaped cross-section member is arranged between steel sheet piles having a shape-shaped cross-section member, and joints of adjacent steel sheet piles are connected to each other to be placed in the ground.

  According to the steel sheet pile having the groove-shaped cross-section member of the first invention, each web is provided with grooves formed by the webs (9) on both sides and the flange (10) integrally connecting these webs (9). The arm portion (19) is integrally connected to (9), and the joint (12) is integrally formed at the end of each arm portion (19) to form the grooved steel sheet pile (4). A groove-shaped cross-section member (3) having a side plate (14) on both sides and a front plate (3a) integrally connecting these side plates (14) is formed, and the grooved steel sheet pile (4) In the predetermined range (L) in the longitudinal direction, the other end of each side plate (14) has a length corresponding to the predetermined range (L), and the other end of each of the side plates (14) is welded or the like. A space (5) is formed by the grooved steel sheet pile (4) and the groove-shaped cross-section member (3). The both ends of the front plate (3a) are arranged with a difference in the distance (R) from the line segment connecting the central axes of the joints (12) of the grooved steel sheet pile (4). When the wall body (27) is formed by fitting the joints in the sheet pile (4) to each other, the end portions of the adjacent front plates (3a) can be arranged with the positions shifted inward and outward in the wall thickness direction. Therefore, by fixing the installation position of one side plate to the outer surface of the grooved steel sheet pile (4), the rigidity is enhanced while preventing the outer surface between the side plates in the grooved steel sheet pile (4). In addition, since the end portions of the adjacent front plates (3a) can be arranged to be shifted in and out of the wall thickness direction, the end portions of the adjacent front plates (3a) located on the inner side can be arranged. In addition, it is possible to prevent wear and tear caused by contact with liquid sand, drift sand, suspended sand and drifting objects. (4) and the interposition sectional member (3), the effect of such can increase the rigidity to be a non-identical directions.

  According to the second invention, in the steel sheet pile having the groove-shaped cross-section member of the first invention, the front plate (3a) is inclined with respect to the grooved steel sheet pile 4 in plan view. By simply inclining 3a), the end portions of the adjacent front plates (3a) can be arranged at different positions in and out of the wall thickness direction, so that effects such as a simple structure can be obtained.

  According to the third invention, in the steel sheet pile having the groove-shaped cross-section member of the first invention or the second invention, the front plate (3a) is a steel sheet pile having the same cross-sectional form as the grooved steel sheet pile (4). Therefore, the effect that it can be set as the steel sheet pile which has an inexpensive groove-shaped cross-section member is acquired.

  In 4th invention, the steel sheet pile which has the groove-shaped cross-section member in any one of 1st invention-3rd invention WHEREIN: One side surface plate (14) in the said groove-shaped cross-section member (3) is the said steel sheet pile with a groove | channel ( 4) Since the joint (2) is fixed to the outer surface by a fixing means such as welding, the effect is obtained that the outer surface of the joint exposed to the water side can be reduced to further prevent rusting of the joint. It is done.

  According to the steel sheet pile having the groove-shaped cross-section member of the fifth invention, in the steel sheet pile having the groove-shaped cross-section member of any of the first to fourth inventions, at least the lower end portion of the space portion 5 is a steel sheet pile with a groove. Since the closing plate (6) fixed to either one or both of (4) and the groove-shaped cross-section member (3) is provided and closed, the space portion having the closing plate can be easily formed. In addition, it is possible to obtain an effect that the torsional rigidity can be improved.

  In the steel sheet pile having the groove-shaped cross-section member of the sixth invention, in the steel sheet pile having the groove-shaped cross-section member of any of the first to fifth inventions, a slit (28) is provided at a predetermined position of the grooved steel sheet pile 4. The steel plate for locking (29) is fixed to a portion corresponding to the slit (28) on the surface of the space plate (5) of the front plate (3a) by means such as welding, and the steel plate for locking (29) Is inserted into the slit (28), and the end of the locking steel plate (29) is fixed to the grooved steel sheet pile 4 by means of welding or the like, so that the grooved steel is secured by the locking steel plate (29). Since the front plate (3a) is locked to the sheet pile (4), the front plate (3a) falls off even if the left or right end of the front plate (3a) or the side plate (14) is worn out. While maintaining the position of the front plate (3a) relative to the grooved steel sheet pile (4) The effect of, or the like can be obtained.

  In the steel sheet pile having the groove-shaped cross-section member of the seventh invention, in the steel sheet pile having the groove-shaped cross-section member of any of the first invention to the fifth invention, an opening (30) is provided at a predetermined position of the front plate 3a, A rod-like member (32) is fixed to a position corresponding to the opening (30) on the surface of the space (5) side of the grooved steel sheet pile (4) by means such as welding, and the rod-like member (32) is Since the end of the rod-like member (32) is fixed to the front plate (3a) by means such as welding or screwing with a nut, the grooved steel is inserted by the rod-like member (32). Since the front plate (3a) is connected to the sheet pile (4), the front plate (3a) will fall off even if the left and right ends of the front plate (3a) or the side plates (14) are worn out. While being able to prevent, holding the position of the front plate (3a) relative to the grooved steel sheet pile (4) Effects such as wear can be obtained.

  In the steel sheet pile having the groove-shaped cross-section member of the eighth invention, in the steel sheet pile having the groove-shaped cross-section member of any one of the first to seventh inventions, the grooved steel sheet pile (4) and the front plate (3a) are provided. Since the spacing member (26) made of a steel plate or the like is fixed by means of welding or the like at one or both of the upper part and the lower part, the front plate (3a) and the groove are provided at the time of placing. The steel sheet pile (4) can be prevented from shaking, eliminating concerns about the occurrence of unexpected stress in the weld due to shaking and the occurrence of cracks in the weld. The effect of being able to play the role of stress generation prevention is obtained.

  According to the wall of 9th invention, the steel sheet pile which has the groove-shaped cross-section member in any one of 1st invention-8th invention is arrange | positioned individually, or it is described in any one of Claims 1-8. Since the steel sheet pile not having at least one groove-shaped cross-section member is arranged between the steel sheet piles having the groove-shaped cross-section member, and the joints of the adjacent steel sheet piles are connected to each other and placed on the ground, than in the conventional case The effect that a highly rigid wall body can be realized economically is obtained.

It is a cross-sectional top view which shows the steel sheet pile which has the groove-shaped cross-section member of one Embodiment of this invention. It is a cross-sectional top view of the wall body using the steel sheet pile which has the groove-shaped cross-section member of one Embodiment of this invention. It is explanatory drawing of the steel sheet pile which has the groove-shaped cross-section member of one Embodiment of this invention. (A) is a front view of the steel sheet pile which has the groove-shaped cross-section member of one Embodiment of this invention shown in FIG. 3, (b) is a front view of another form. It is a vertical side view which shows the inclination board vicinity provided in the lower side of a closure board. It is an expansion cross-sectional top view which shows the position and welding part in case a side plate fixes to the coupling of a steel sheet pile with a groove | channel, or a joint vicinity. It is a cross-sectional top view which shows the form in the case of fixing the front plate of a groove-shaped cross-section member to the steel sheet pile with a groove | channel on the main body side. (A) (b) is a cross-sectional top view which shows the steel sheet pile which has the groove-shaped cross-section member of other embodiment of this invention. (A) (b) is a partially longitudinal side view which shows two examples of the wall body using the steel sheet pile with a groove | channel of this invention. It is a cross-sectional top view which shows the wall body using the steel sheet pile which has the conventional steel cover materials. It is a top view which shows a hat-shaped steel sheet pile. The other form of the steel sheet pile which has the groove-shaped cross-section member of this invention is shown, (a) is a front view, (b) is a top view, (c) is sectional drawing. The further another form of the steel sheet pile which has the groove-shaped cross-section member of this invention is shown, (a) is a front view, (b) is a vertical side view. The steel sheet pile which has the groove-shaped cross-section member of this invention shows the form which connected the groove-shaped cross-section member and the steel sheet pile by the steel plate for latching, Comprising: (a) is a longitudinal section of the arrow view in Fig.13 (a) A side view and (b) are front views of (a). (A)-(d) is a partially longitudinal side view which shows the other form of the wall body using the steel sheet pile which has the groove-shaped cross-section member of this invention. (A)-(d) is a partially longitudinal side view which shows the other form of the wall body using the steel sheet pile which has the groove-shaped cross-section member of this invention.

    Next, the present invention will be described in detail based on the illustrated embodiment.

  First, the hat-shaped steel sheet pile 2 shown in FIG. 11 will be briefly described as a representative form as the grooved steel sheet pile 4 used in the present invention. In the present invention, when the steel sheet pile joints are fitted and connected to each other to form a wall body, when a horizontal force acting on the wall body is applied, a portion that mainly resists the bending moment is provided with a flange (arm The part 13 and the joint part 12 are also parts that resist bending moment and exhibit the same function as the flange.), And the part that mainly resists shearing force will be described as a web.

  In FIG. 11, the hat-shaped steel sheet pile 2 shown as an example of the representative form of the steel sheet pile 4 with a groove | channel is shown, and it inclined so that it might spread toward the outer side at the both ends of the flange 10 as the characteristic of this hat-shaped steel sheet pile 2. The web 9 is integrally connected to each other, the arm portions 19 and 19 are integrally connected to each web 9 in parallel with the flange 10, and the joint 12 is integrally formed at the end of each arm portion 19 and 19. A hat-shaped steel sheet pile 2 having a hat-shaped cross section, in which the left and right joints 12 are point-symmetric joints 12 with respect to the center point of the central axis of the arm portions 19, 19, and adjacent hat-shaped steel sheet piles. When the two joints 12 are fitted, the hat-shaped steel sheet pile 2 can be disposed on the arm center axis. The joint 12 includes a fitting groove and a locking claw portion. A wall body in which a plurality of hat-shaped steel sheet piles 2 are used and the joints 12 are fitted to each other has the joints 12 positioned at both edges in the wall thickness direction. Therefore, a horizontal force perpendicular to the wall surface of the wall body is generated. Even when a vertical shearing force (a force that is generated with the generation of a bending moment and is a force to relatively displace the fitting joint) acts on the wall body, the joint 12 has a wall thickness. Since it is located at the outermost edge in the direction, there is no deviation between the joints of the adjacent steel sheet piles, so that it is a wall body with high wall rigidity, and the hat-shaped steel sheet pile shown in FIG. It is a characteristic steel sheet pile that can be constructed.

  On the front surface of the grooved steel sheet pile 4 made of the hat-shaped steel sheet pile 2, a hat-shaped steel groove having a length corresponding to the predetermined range L and a predetermined range L in the longitudinal direction of the grooved steel sheet pile 4. The front plate 3a in the shaped cross-section member 3 is disposed so as to be separated from the flange 10 in the grooved steel sheet pile 4 by a predetermined distance h, and is fixed by welding or the like indirectly through a side plate 14 made of a strip steel plate. The grooved steel sheet pile 4 and the groove-shaped cross-section member 3 are fixed to the grooved steel sheet pile 4 by means of the grooved steel sheet pile 4 and the groove-shaped cross-section member 3. A closing plate 6 fixed to either one or both is provided and closed. A closing plate (not shown) as a lid is also fixed to either one or both of the grooved steel sheet pile 4 and the groove-shaped cross-sectional member 3 at the upper end of the space 5 so as to be closed. Also good. When the closing plate 6 is fixed to both the grooved steel sheet pile 4 and the groove-shaped cross-section member 3 by welding, the bending rigidity and the torsional rigidity can be further increased.

  The predetermined range L for attaching the groove-shaped cross-section member 3 to the grooved steel sheet pile 4 is basically determined by the structural design (calculation). For example, the following cases (1) and (2) may be used. Conceivable. (1) In the case of a structure in which the member cross section is determined by stress, for example, as shown in FIG. 15, the member cross section is installed in a range L including a portion having a large generated stress such as a range including a portion having a large bending moment. (2) In the case of a structure in which the member cross section is determined by displacement, for example, in the case of a self-supporting steel sheet pile wall as shown in FIGS. 9 (a) (b) or 15 (a)-(d), the design The groove-shaped cross-section member 3 is installed in a range L that is effective in reducing displacement such as a range including the vicinity of the ground surface (mainly deeper than the design ground surface). In addition, as shown in FIG. 9 (a) (b) or FIG. 15 (c), near the tidal zone where there is a high possibility of intensive corrosion (water depth 0.5 m, preferably below WWL) In the form in which the range covering the range up to 1 m) is included in the L, it is advantageous in both corrosion prevention and rigidity. Note that the predetermined range L satisfies the above-described conditions according to the structural design, and, for example, when considering scouring due to the influence of waves and river flows in the water area as shown in FIG. 9B. May be included up to a predetermined depth in the water bottom ground 23.

  The wall 27 shown in FIG. 15 (a) is a self-supporting steel sheet pile wall so that the groove-shaped cross-section member 3 of the steel sheet pile 8 having the groove-shaped cross-section member crosses into the water from a predetermined depth in the water bottom ground 23. It is set as the form to install in. The wall 27 shown in FIG. 15 (b) may be a self-supporting steel sheet pile wall, and the groove-shaped cross-section member 3 may be arranged on the backfill 17 side, and the self-supporting steel sheet pile shown in FIGS. 15 (c) and 15 (d). Like the wall 27 of the wall, the groove-shaped cross-section member 3 is continuously provided upward from a predetermined depth in the water bottom ground 23, and the upper end portion of the steel sheet pile 4 composed of the groove-shaped cross-section member 3 and the hat-shaped steel sheet pile 2. May be embedded in the upper concrete 33. In such a form, higher rigidity is exhibited. In the form shown in FIG. 15 (d), since the groove-shaped cross-sectional member 3 is embedded on the back buried soil 17 side, the sea side is only the grooved steel sheet pile 4, so the side wall surface on the sea side is the groove-shaped cross section. Since there is no unevenness due to the member 3, a flat side wall surface can be obtained. Further, in the wall body 27 shown in FIG. 16, the tie rod 35 and the female screw member attached to the tie rod 35 and the upper portion of the steel sheet pile 8 having the groove-shaped cross-sectional member are appropriately interposed with a support beam and a support plate. The tie rod type (preliminary type) steel sheet pile wall is used and connected.

  When the steel sheet pile 8 having a groove-shaped cross-sectional member is driven on the bottom bottom ground 23, the blocking plate 6 protrudes horizontally, so that the resistance increases at the time of driving, and the blocking plate 6 is used to reduce the resistance. An inclining plate 13 for penetrating resistance reduction inclined downward from the tip toward the steel sheet pile is disposed and fixed to the groove-shaped cross-section member 3 and the steel sheet pile by welding or the like. When the closing plate 6 is omitted and the lower plate side of the groove-shaped cross-sectional member is closed by using the inclined plate 13 together with the closing plate 6, as in the embodiment shown in FIGS. A plurality of front-side inclined plates 13 that incline downward toward the steel sheet pile 2 over the lower end of the front plate 3a and the belt-shaped side plate 14, and the steel sheet pile 2 and the inclined plate on the front side. When the steel side surface closing plate 16 that closes between the lower end of the groove-shaped cross-sectional member 3 is fixed by welding or the like, the front and side surfaces on the lower end side of the groove-shaped cross-sectional member 3 are closed with a simple structure. be able to. The side closing plate 16 is disposed and welded and fixed so as not to close the joint groove on the steel sheet pile side. In addition, as shown in FIG.4 (b), when providing the groove-shaped cross-section member 3 to the lower end of the steel sheet pile 2, the said obstruction | occlusion board 6 and the inclination board 13 do not need to be provided, Underwater ground may be used as a blocking means.

  Next, the groove-shaped cross-section member 3 will be described with reference to FIGS. In the illustrated embodiment, the groove-shaped cross-sectional member 3 includes one side plate 14 (14a) having a smaller width dimension and the other side plate 14 (14b) having a larger width dimension, and a front plate 3a. It is formed on the back surface of the steel plate by being vertically arranged over a predetermined range and fixed by fillet welding W. In the form shown in FIG. 1, the front plate 3 a is made of the same material as the grooved steel sheet pile 4 made of the hat-shaped steel sheet pile 2, and is cut into a short length or a long length so as to be in a predetermined range L. Thus, the predetermined range L is covered using the front plate 3a. In the embodiment, since a member having the same cross-sectional shape as the hat-shaped steel sheet pile 2 is used as the front plate 3a of the groove-shaped cross-sectional member 3 as a cover material, the steel sheet pile is easy to understand in a cross-sectional plan view. The hat-shaped steel sheet pile 2 forming the wall is hatched, and the groove-shaped cross-sectional member 3 as the cover material is not hatched.

  The front plate 3a of the groove-shaped cross-sectional member 3 is integrally provided with webs 9a inclined so as to spread outward at both ends of the flange 10a, and arm portions 19a are integrated with each web 9a in parallel with the flange 10a. Are formed by cutting a hat-shaped steel sheet pile having a cross-sectional hat shape in which the joint 12a is integrally formed at the end of each arm portion 19a to a predetermined length. There are a case where the front plate is convex by 10a (in the case of FIG. 1) and a case where it is reversed (FIG. 8a), but it is point-symmetric with respect to the central point of the central axis of each arm portion 19a. This also applies to the shape of the joint 12a. The left and right joints 12a do not expect a function as a joint for fitting with an adjacent joint, but to fix the base end side of one side plate 14 and to the water area side of the joint 12 on the steel sheet pile side. This is a part to improve the corrosion resistance while increasing the rigidity and reducing the exposure.

  As shown in FIG. 3, the groove-shaped cross-sectional member 3 has a side plate 14 (14 a) made of one strip-shaped steel plate having a small width H <b> 1 and a width wider than the width H <b> 1 compared to the other side plate. The other side plate 14 (14b) having a large width H2 is provided. The base end portion of the one side plate 14a in the groove-shaped cross-sectional member 3 is disposed so as to stand upright on the groove side claw tip portion of one joint 12 in the front plate 3a, and is welded from the outside by W1. The other side plate 14 (14b) is fixed and is disposed so as to stand on the arm portion 19a in the vicinity of the other joint 12. The groove-shaped cross-section member 3 is fixed by welding W1 from the outside. . The width dimensions of the one side plate 14a and the other side plate 14b are set by design.

  In the groove-shaped cross-section member 3 configured as described above, the front plate (3a) can be disposed to be inclined with respect to the grooved steel sheet pile (4) in plan view. In the relationship with the front plate 3a of the adjacent steel sheet pile, the one joint 12a in is positioned on the back side of the joint of the other front plate 3a. It is possible to avoid wear and tear caused by contact and collision of liquid sand, drift sand, suspended sand and drifting objects.

  As shown in FIG. 6, one side plate 14 (14a) and the other side plate 14 (14b) of the groove-shaped cross-section member 3 are arranged at right angles to the central axis connecting the joint centers on the sheet pile wall side, The side plate 14 (14a) of the other side plate 14 is fixed to the bottom surface of the groove bottom portion of the joint 12 of the grooved steel sheet pile 4 made of the hat-shaped steel sheet pile 2 by welding W2 from the outside. The tip of (14b) is fixed to the arm part 19 of the hat-shaped steel sheet pile 2 by welding W2 from the outside, so that the anticorrosion range extends beyond the anticorrosion layer 15 up to the bottom of the groove bottom, and the welded part W2 The steel sheet pile 8 has a groove-shaped cross-sectional member having a wide anti-corrosion range up to the middle, and the steel sheet pile 8 has a groove-shaped cross-sectional member with improved performance in both rigidity and corrosion resistance.

  As shown in the center of FIG. 7 or FIG. 13 and FIG. 14, slits 28 are provided at predetermined positions of the grooved steel sheet pile 4 (for example, at intervals in the vertical direction at the center in the width direction of the flange 10), A base end side of a rectangular steel plate 29 is fixed to a position corresponding to the slit 28 on the surface 5 side surface of the front plate 3a by means of welding or the like, and the locking steel plate 29 is fixed to the slit 28. The end of the locking steel plate 29 is fixed to the grooved steel sheet pile 4 by fixing means by welding. As described above, when the front plate 3a is locked to the grooved steel sheet pile 4 by the locking steel plate 29, the front plate 3a is not worn even if the end of the left-right direction or the side plate 14 of the front plate 3a is worn. While being able to prevent falling off, the position of the front plate 3a with respect to the grooved steel sheet pile 4 can be maintained. The slit 28 is provided in the grooved steel sheet pile 4 and the locking steel plate 29 is provided in the groove-shaped cross-section member 3 in advance, and the side plate 14 of the groove-shaped cross-section member 3 is welded to the grooved steel sheet pile 4 by means such as welding. When connecting and integrating, the leading end portion of the locking steel plate 29 may be inserted into the slit 28 and fixed by means such as welding.

  Further, for the same purpose as the locking steel plate 29, as shown in the right end portion of FIG. 7, at a predetermined position of the front plate 3a (for example, at a central portion in the width direction of the flange 10 with an interval in the vertical direction). ) An opening 30 is provided, and a base end portion of the rod-like member 32 is fixed to a portion corresponding to the opening 30 on the surface of the grooved steel sheet pile 4 on the space portion 5 side by means of welding or the like. When inserted into the opening 30 and the end of the bar member 32 is fixed to the front plate 3a by means such as welding or screwing with the nut 25, the front plate 3a is attached to the grooved steel sheet pile 4 by the bar member 32. Therefore, the front plate 3a can be prevented from falling off even when the left or right end of the front plate 3a or the side plate 14 is worn, and the front plate 3a with respect to the grooved steel sheet pile 4 can be prevented. The position of can be held.

  As described above, the one side plate 14 (14a) and the other side plate 14 (14b) are provided in the state where the locking steel plate 29 or the bar-like member 32 is provided on the front plate 3a of the groove-shaped cross-section member 3. Is fixed to the steel sheet pile main body by welding from the outside. Moreover, as shown in the upper part of FIG. 12, the grooved steel sheet pile 4 and the front plate are fixed to the hat-shaped steel sheet pile 2 and the front plate 3a by welding both ends of the spacing member 26 made of a steel plate or the like. You may make it hold | maintain the space | interval with 3a. The spacing member 26 plays a role of preventing blurring when the steel sheet pile 8 having a groove-shaped cross-sectional member is placed. If the grooved steel sheet pile 4 and the groove-shaped cross-section member 3 are shaken, it is feared that unexpected stress is generated in the welded portion and cracks are generated in the welded portion. There is an effect. As described above, the steel sheet pile 8 having the groove-shaped cross-section member is manufactured. In the case where a plurality of spacing members 26 are provided, it is preferable to provide an opening for attaching a hanging bracket to the spacing member 26 installed in the upper portion, and to use both the spacing member 26 and the hanging bracket.

  As described above, the one side plate 14 (14a) and the other side plate 14 (14b) have different width dimensions, and are arranged in a substantially right angle state, so that the front plate 3a in the groove-shaped cross-section member 3 is provided. Both end portions of the grooved steel sheet pile 4 are arranged with a difference in distance R from a line segment C connecting the central axes of the joints 12 of the grooved steel sheet pile 4. At least the end (joint 12a) has a distance R1 (R) to the outer surface of one end (joint 12a) of the front plate 3a and a distance R2 (R) to the outer surface of the other end (joint 12a). The difference of the thickness dimension is provided. When the wall 27 is formed by fitting the joints in the steel sheet pile 4 with the groove, the end portions of the adjacent front plates 3a can be arranged to be shifted in and out of the wall thickness direction. However, when the one side plate 14 (14a) is inclined and fixed to one arm portion 19 on the left side of FIG. 1, one side plate 14 (14a) and the other side plate 14 ( Since the width dimension of 14b) may be the same, only the magnitude of the width dimension of the side face plate does not determine the inclined arrangement of the front face plate 3a in the groove-shaped cross-sectional member 3. Therefore, either one of the side plates may be inclined as the side plate 14 having the same width dimension, or a side plate having a large width dimension may be inclined. However, when the side plate 14 (14a, 14b) is arranged so as to stand upright and the front plate is inclined according to the size of the width dimension, the structure is simple and a horizontal force perpendicular to the wall surface is obtained. In the case of the action, the configuration of standing upright at a right angle is more advantageous than the inclined side plate because there is no fear of increasing the burden on the welded portion.

  When the water bottom ground is used as a bottom mold, the inclined plate 13 and the closing plate 6 may be omitted. As described above, the lower end side is closed by the closing plate or the inclined front plate. In the form, it is a form that can be supported when a structure is constructed in the upper part, and the rigidity is increased. Further, the steel sheet pile 8 having the groove-shaped cross-section member in the state where the lower end portion of the groove-shaped cross-section member 3 forming the space portion 5 in cooperation with the groove-shaped steel sheet pile 4 is also opened. The steel sheet pile 8 having the groove-shaped cross-section member is also provided when the lower end portion is driven relatively deeply into the ground, the soil enters the space 5 and the tip of the groove-shaped cross-section member 3 is closed. It is in a form that can be supported when a structure is constructed in the upper part, and has increased rigidity (torsional rigidity).

  The steel sheet pile 8 having the groove-shaped cross-section member as described above is driven on the bottom bottom ground 23, and the joints 12 of the steel sheet piles 8 having the adjacent groove-shaped cross-section members are engaged with each other and shown in FIG. Such a wall body 27 is constructed.

  For the purpose of improving the rigidity, the space portion 5 can be filled with a curable filler such as a cement-based temporally curable filler (cement milk, mortar, concrete, resin mortar, etc.).

  In the wall body 27 as shown in FIG. 2, since the end portion (joint 12a) of one front plate 3a is located on the inner side, it prevents wear due to contact / impact of sand flow, sand drift, suspended sand and drifting material. In addition, the joint 12 on the steel sheet pile 8 side having the groove-shaped cross-section member has a portion that is exposed to the water area side significantly less than the conventional case, so that this portion is prevented from being worn and prematurely corroded. This prevents a reduction in rigidity. Even when the structure is constructed above the wall body 27 when the steel sheet pile 8 having the groove-shaped cross-section member with improved rigidity is inserted into the ground such as the water ground including the groove-shaped cross-section member. The steel sheet pile 8 having a groove-shaped cross-sectional member having high bending rigidity and shear rigidity is not damaged even when a horizontal force is applied during an earthquake or the like.

In the case of the embodiment of the present invention as described above, the following effects (1) to (5) can also be exhibited.
(1) Since the grooved steel sheet pile is provided with a steel groove-shaped cross-section member in advance, the concentrated corrosion site in the grooved steel sheet pile can be protected by the groove-shaped cross-section member, and the grooved steel sheet pile itself Concentrated corrosion of can be avoided.
(2) Since a steel channel cross-section member is used, mechanical damage is less likely to occur even if driftwood or ice sheets collide.
(3) Since a groove-shaped cross-section member, an inclined plate, and a side plate can be attached to a grooved steel sheet pile in advance at a factory or the like, an inexpensive grooved steel sheet pile can be obtained.
(4) When the filler is filled for the purpose of improving the rigidity, the filling portion is formed in advance, so that the filling operation is easy.
(5) In the groove-shaped cross-section member, when the corrosion of the concentrated corrosion portion has progressed, the function as the groove-shaped cross-section member can be easily recovered simply by welding the steel plate so as to cover the portion.

  8 (a) and 8 (b) show a form in which the wall body 27 is formed using the steel sheet pile 8 having the groove-shaped cross-section member of another form of the present invention. The difference from the embodiment shown in FIG. 2 is that the front plate 3a on the groove-shaped cross-section member 3 side is the same as the hat-shaped steel sheet pile, and therefore the front plate in the embodiment shown in FIG. 3a is arranged in a state rotated by 180 °, and one side plate 14 (14a) and the other side plate 14 (14b) are formed into a groove-shaped cross-section member 3 installed on the front plate 3a, and such a groove-shaped cross section The member 3 is fixed to the arm portion 19 of the hat-shaped steel sheet pile 2. In such a form, the groove on the front plate 3a side and the groove of the hat-shaped steel sheet pile 2 are opposed to each other, and the wall thickness dimension is large and the rigidity is increased. It is the same as the form. Moreover, the form shown in FIG.8 (b) is the form which attached the side plate of the groove-shaped cross-section member 3 to the arm part 19 of the hat-shaped steel sheet pile 2 in the state which rotated the hat-shaped steel sheet pile 2 180 degrees. . In the form shown in FIG. 8 (b), each side plate is wider than each of the above embodiments, so that the distance from the joint portion 12 of the steel sheet pile to the front plate 3a is increased, and the rigidity is accordingly increased. In addition to reducing the wear due to the contact and collision of liquid sand, drift sand, suspended sand and drifting material with respect to the joint 12, the wear between the side plates is further reduced to reduce wear of the joint 12. Yes.

  In the said embodiment, the grooved steel sheet pile 4 which consists of a hat-shaped steel sheet pile 2, and the front board 3a of the groove-shaped cross-section member 3 use the same narrow side face plate 141 for attachment like the prior art shown in FIG. It is not the same direction as the wall construction direction, but by using side plates with different widths, or by arranging one side plate at an angle, the grooved steel sheet pile 4 and the front plate 3a of the groove-shaped cross-sectional member 3 are provided. Because they are arranged in non-identical directions, the center of gravity of the grooved steel sheet pile and the groove-shaped cross-section member are separated compared to the case of the conventional unidirectional arrangement, and the cross-sectional performance as a composite cross-section Is larger than that in the same direction (prior art). Moreover, since the hat-shaped steel sheet pile of the same raw material is used for the hat-shaped steel sheet pile 2 for the front plate 3a like embodiment of illustration, it is economical.

  In addition, when constructing the wall body 27, the steel sheet pile 8 having the groove-shaped cross-sectional member in a state where the space portion 5 is not filled with the filler may be placed on the water bottom ground, and the groove not filled with the filler. Adjacent joints of steel sheet piles 8 having a cross-sectional member may be engaged with each other, placed on the water bottom ground, and then the space 27 may be filled with a filler to construct the wall body 27. In the case of constructing the wall body 27, (A) the wall body may have a form using only the steel sheet pile having the groove-shaped cross-section member of the present invention, and (B) the groove-shaped cross-section member of the present invention is included. It is good also as a wall body of the form which arranged the steel sheet pile and the steel sheet pile which does not have a groove-shaped cross-section member alternately, and has two or more channel-shaped cross-section members between the steel sheet piles which have (C) groove-shaped cross-section members. It is good also as a wall body of the form which interposes the steel sheet pile which does not carry out, and the wall body of the form arrange | positioned by a fixed rule like said (A) (B) (C) may be sufficient. Thus, in the wall body incorporating the steel sheet pile having the groove-shaped cross-section member, a wall body having higher rigidity than the conventional case can be realized economically. In addition, as a steel sheet pile which does not have the said groove-shaped cross-section member, it is good to use the hat-shaped steel sheet pile 2, for example.

  When carrying out the present invention, it is economical to use a hat-shaped steel sheet pile having the same cross section as the grooved steel sheet pile 4 as the front plate 3a, but it is not limited to a hat-shaped steel sheet pile, but a hat-shaped steel sheet pile. In addition to the steel sheet pile, it may be a vertically long rectangular flat plate-like steel plate or a front plate using a steel plate having a groove or unevenness on the surface. In order to shift the position in the wall thickness direction between the side edges of the front plate 3a in the adjacent steel sheet piles, the side edge of one front plate 3a is rearward in the wall thickness direction on the transverse plane, and the other front plate 3a It is also possible to make the side end edge a curved part bent forward in the wall thickness direction, a refracted cross-section L-shaped part, or an inclined inclined part.

  When implementing this invention, you may make it use the steel sheet pile which has a groove-shaped cross-section member for land area structures, such as water area structures, such as a harbor steel structure, a retaining wall, and a retaining wall.

  As a fixing means for the side plate 14 or the like, in addition to welding, it may be fixed by a bolt or the like, or welding and a bolt may be used in combination.

W Effective width 2 Hat-shaped steel sheet pile 3 Groove-shaped cross-section member 3a Front plate 4 Grooved steel sheet pile 5 Space 6 Blocking plate 8 Steel sheet pile 9 having groove-shaped cross-section member Web 9a Web 10 Flange 10a Flange 11 Groove 12 Groove 12 Joint 13 Inclined Plate 14 Side plate 15 Anticorrosion layer 16 Side block plate 17 Backfill 19 Arm portion 22 Bolt 23 Bottom floor 25 Nut 26 Spacing material 27 Wall body 28 Slit 29 Locking steel plate 30 Opening 31 Steel cover material 32 Bar-shaped member 33 Upper concrete 34 Preliminary work 35 Tie rod 81 Steel sheet pile 141 having steel cover Strip steel plate 161 for attachment Wall body (steel sheet pile wall)

Claims (9)

  A groove formed by a web (9) on both sides and a flange (10) integrally connecting these webs (9) is provided, and an arm portion (19) is integrally connected to each web (9). A joint (12) is integrally formed at the end of each arm portion (19) to form a grooved steel sheet pile (4), and has side plates (14) on both sides at intervals and these sides. A groove-shaped cross-section member (3) having a front plate (3a) that integrally connects the face plate (14) is formed, and the predetermined range (L) is within the predetermined range (L) in the longitudinal direction of the grooved steel sheet pile (4). L), the other end of each side plate (14) is fixed to the surface of the grooved steel sheet pile (4) by means such as welding, and the grooved steel sheet pile (4) and the above-mentioned A space (5) is formed by the groove-shaped cross-section member (3), and both end portions of the front plate (3a) are grooved steel arrows. A wall is formed by fitting the joints in the grooved steel sheet pile (4) with a difference in the distance (R) from the line segment (C) connecting the central axes of the joints (12) in (4). A steel sheet pile having a groove-shaped cross-section member in which, when a body (27) is formed, the end portions of adjacent front plates (3a) can be arranged to be shifted in and out of the wall thickness direction. .   The steel sheet pile having a groove-shaped cross-section member according to claim 1, wherein the front plate (3a) is inclined with respect to the grooved steel sheet pile (4) in plan view.   The steel sheet pile having a groove-shaped cross-section member according to claim 1 or 2, wherein a steel sheet pile having the same cross-sectional shape as the grooved steel sheet pile (4) is used for the front plate (3a).   One side plate (14) in the groove-shaped cross-section member (3) is fixed to the outer surface of the joint (2) of the grooved steel sheet pile (4) by fixing means such as welding. The steel sheet pile which has the groove-shaped cross-section member of any one of 1-3.   At least the lower end of the space portion (5) is closed by providing a closing plate (6) fixed to one or both of the grooved steel sheet pile (4) and the groove-shaped cross-section member (3). The steel sheet pile which has the groove-shaped cross-section member of any one of Claims 1-4 characterized by the above-mentioned.   A slit (28) is provided at a predetermined location of the grooved steel sheet pile (4), and a locking steel plate (29) is provided at a location corresponding to the slit (28) on the space (5) side surface of the front plate (3a). Is fixed by means such as welding, the locking steel plate (29) is inserted into the slit (28), and the end of the locking steel plate (29) is welded to the grooved steel sheet pile (4). The steel sheet pile having the groove-shaped cross-section member according to any one of claims 1 to 5, wherein the steel sheet pile is fixed by means.   An opening (30) is provided at a predetermined location on the front plate (3a), and a rod-shaped member (32) is provided at a location corresponding to the opening (30) on the surface of the space portion (5) of the grooved steel sheet pile (4). Is fixed by means such as welding, and the rod-like member (32) is inserted into the opening (30), and the end of the rod-like member (32) is welded or screwed with a nut or the like to the front plate (3a). The steel sheet pile having the groove-shaped cross-section member according to any one of claims 1 to 5, wherein the steel sheet pile is fixed by means.   The grooved steel sheet pile (4) and the front plate (3a) are fixed by a means such as welding with a spacing member (26) made of a steel plate or the like at one or both of the upper and lower portions thereof. A steel sheet pile having a groove-shaped cross-section member according to any one of claims 1 to 7.   The steel sheet pile which has the groove-shaped cross-section member of any one of Claims 1-8 arrange | positions the steel sheet pile which has the groove-shaped cross-section member of any one of Claims 1-8 independently, or the groove-shaped cross-section member of any one of Claims 1-8. A wall body characterized in that a steel sheet pile not having at least one groove-shaped cross-sectional member is disposed between sheet piles, and joints of adjacent steel sheet piles are connected to each other and placed on the ground.

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