JP7061876B2 - Joint structure of steel pipe sheet pile - Google Patents

Description

The present invention relates to a joint structure of a steel pipe sheet pile.

Conventionally, in a steel pipe sheet pile foundation, joint steel pipes of adjacent steel pipe sheet piles are joined to each other (see, for example, Patent Document 1).
The two joint steel pipes are fitted through slits formed in the respective axial directions, and mortar is injected into each of the two joint steel pipes.
The first insertion plate portion inserted inside the other joint steel pipe of one joint steel pipe and the second insertion plate portion inserted inside one of the joint steel pipes of the other joint steel pipe are spaced apart from each other. Are facing each other.

Such a joint steel pipe has a temporary cutoff function during the construction of the steel pipe sheet pile foundation, and has a function of suppressing shear deformation between adjacent steel pipe sheet pile mains after the construction. In order to fully exert such a function, it is necessary to set the distance between the first insertion plate portion and the second insertion plate portion to a desired size and to reliably inject the mortar into this gap.

Japanese Unexamined Patent Publication No. 2002-105949

However, if the two joint steel pipes are misaligned or disengaged from each other during construction, there is a problem that the distance between the first insertion plate portion and the second insertion plate portion cannot be set to a desired size.

Therefore, according to the present invention, it is possible to prevent the joint steel pipes to be joined from being displaced from each other or coming off from each other, and the distance between the first insertion plate portion and the second insertion plate portion is set to a desired size. It is an object of the present invention to provide a joint structure of a steel pipe sheet pile that can be used.

In order to achieve the above object, in the joint structure of the steel pipe sheet pile according to the present invention, the first joint steel pipe of the adjacent first steel pipe sheet pile and the second joint steel pipe of the second steel pipe sheet pile are formed in the axial direction respectively. The first insertion plate portion inserted into the inside of the second joint steel pipe of the first joint steel pipe and the first joint steel pipe of the second joint steel pipe, which are fitted through a slit extending into the pipe. In the joint structure of the steel pipe sheet pile in which the second insertion plate portion inserted inside and the second insertion plate portion are arranged to face each other at intervals, the first insertion plate portion and at least one of the second insertion plate portions face each other. A protruding portion that protrudes larger than the width of the slit is provided on the insertion plate portion side, and the protruding portion is provided in a direction in which the first insertion plate portion and the second insertion plate portion face each other, and the first joint steel pipe. And at least one of the first insertion plate portion and the second insertion plate portion provided with a plurality of intervals in a direction intersecting both of the axial directions of the second joint steel pipe. Is formed with a notch, and the protrusion is inserted into the notch and welded to the first joint steel pipe or the second joint steel pipe from the outside, and the first joint steel pipe of the protrusions or The portion arranged on the outside of the second joint steel pipe is characterized in that only the welding allowance for welding the protruding portion to the first joint steel pipe or the second joint steel pipe from the outside .

In the present invention, at least one of the first insertion plate portion and the second insertion plate portion is provided with a protrusion portion that protrudes toward the opposite insertion plate portion, whereby the first insertion plate portion and the second insertion plate portion are provided. The distance from the portion can be made larger than the protruding dimension of the protruding portion, and the desired size can be obtained.
Further, since the protruding portion protrudes larger than the width of the slit, it is possible to prevent the protruding portion from passing through the slit, and the insertion plate portion provided with the protruding portion comes out of the inserted joint steel pipe. Can be prevented. This makes it possible to prevent the first joint steel pipe and the second joint steel pipe from coming off from each other.
Further, since a plurality of protruding portions are provided, the distance between the first insertion plate portion and the second insertion plate portion can be reliably secured.

Further, in the joint structure of the steel pipe sheet pile according to the present invention, a notch is formed in at least one of the first insertion plate portion and the second insertion plate portion where the protrusion is provided, and the protrusion is formed. , It is inserted through the notch and welded to the first joint steel pipe or the second joint steel pipe from the outside .
With such a configuration, the protruding portion can be easily welded to the first joint steel pipe or the second joint steel pipe.

Further, in the joint structure of the steel pipe sheet pile according to the present invention, the portion of the protruding portion arranged outside the first joint steel pipe or the second joint steel pipe has the protruding portion as the first joint steel pipe or the said. Only the welding allowance for welding to the second joint steel pipe from the outside .
With such a configuration, the portion protruding outward from the first joint steel pipe or the second joint steel pipe can be made small, so that the steel pipe sheet pile can be easily transported and lifted.

Further, in the joint structure of the steel pipe sheet pile according to the present invention, the protruding portion may have a configuration in which the inner protruding length of the first joint steel pipe or the second joint steel pipe provided with the protruding portion is larger than the outer protruding length. ..
With such a configuration, since there is no portion protruding outward from the first joint steel pipe or the second joint steel pipe, the steel pipe sheet pile can be easily transported and lifted. The inward protrusion length indicates the length of the portion of the first joint steel pipe or the second joint steel pipe that protrudes inward from the inner peripheral surface, and the outer protrusion length is the outer peripheral surface of the first joint steel pipe or the second joint steel pipe. The length of the part protruding outward is shown.

Further, in the joint structure of the steel pipe sheet pile according to the present invention, a cleaning nozzle for cleaning the space between the first insertion plate portion and the second insertion plate portion is arranged at the distance between the adjacent protrusions. It may be configured to be possible.
With such a configuration, it is possible to easily clean the space between the first insertion plate portion and the second insertion plate portion.

According to the present invention, it is possible to prevent the joint steel pipes to be joined from being displaced from each other or coming off from each other, and the distance between the first insertion plate portion and the second insertion plate portion is set to a desired size. Can be done.

It is a perspective view which shows an example of the steel pipe sheet pile by 1st Embodiment of this invention. It is a perspective view which shows an example of the steel pipe sheet pile by 2nd Embodiment of this invention, and is the figure which omitted a part of the steel pipe sheet pile main. It is a figure explaining the connection part of the adjacent steel pipe sheet pile by 1st Embodiment of this invention. It is a figure explaining the connection part of the adjacent steel pipe sheet pile by the 2nd Embodiment of this invention. It is a figure explaining the connection part of the adjacent steel pipe sheet pile by the 3rd Embodiment of this invention.

(First Embodiment)
Hereinafter, the joint structure of the steel pipe sheet pile 1 according to the embodiment of the present invention will be described with reference to FIGS. 1 to 3.
As shown in FIGS. 1 and 2, the steel pipe sheet pile 1 according to the present embodiment is joined to the steel pipe sheet pile main pipe 2 and the outer peripheral surface of the steel pipe sheet pile main pipe 2 along the axial direction of the steel pipe sheet pile main pipe 2. It has two joint steel pipes 3 and 4.

The steel pipe sheet pile main pipe 2 is formed in a cylindrical shape.
One of the two joint steel pipes 3 and 4 is referred to as a first joint steel pipe 3, and the other is referred to as a second joint steel pipe 4. The first joint steel pipe 3 is formed in a cylindrical shape having one slit 3a extending in the entire axial direction. The second joint steel pipe 4 is formed in a cylindrical shape having one slit 4a extending in the entire axial direction.
The first joint steel pipe 3 and the second joint steel pipe 4 have substantially the same diameter and axial dimensions, and have substantially the same axial dimensions as the steel pipe sheet pile main pipe 2 and have a smaller diameter than the steel pipe sheet pile main pipe 2. It is set to be.

The first joint steel pipe 3 is joined to one side in one radial direction orthogonal to the axial direction of the steel pipe sheet pile main pipe 2 with respect to the steel pipe sheet pile main pipe 2. The second joint steel pipe 4 is joined to the other side in one radial direction with respect to the steel pipe sheet pile main pipe 2.
The central axes of each of the steel pipe sheet pile main pipe 2, the first joint steel pipe 3, and the second joint steel pipe 4 are arranged on a straight line extending in one radial direction. In the following, the direction parallel to one radial direction is defined as the connecting direction X, and a straight line in which the central axes of the steel pipe sheet pile main pipe 2, the first joint steel pipe 3, and the second joint steel pipe 4 are arranged when viewed from the respective axial directions. Is the connecting axis 7.
Further, the depth direction Y is defined as the axial direction of the steel pipe sheet pile main pipe 2, the first joint steel pipe 3 and the second joint steel pipe 4, and the direction orthogonal to the connection direction X.

In the first joint steel pipe 3, the other edge portion in the connecting direction X is joined to the one side edge portion in the connecting direction X of the steel pipe sheet pile main pipe 2. The slit 3a of the first joint steel pipe 3 is formed on one side of the depth direction Y and one side of the connection direction X in the first joint steel pipe 3.
Of the circumferential direction of the first joint steel pipe 3, one side of the first joint steel pipe 3 from the joint portion 3b with the steel pipe sheet pile main pipe 2 in the depth direction Y and one side of the connection direction X is defined as one side thereof. The opposite side is the other side. The portion of the first joint steel pipe 3 extending from the joint portion 3b with the steel pipe sheet pile main pipe 2 to the slit 3a on one side in the circumferential direction is referred to as the first arc plate portion 31, and the portion extending on the other side in the circumferential direction is the second arc plate. It is referred to as a part 32. The first arc plate portion 31 is formed shorter in the circumferential direction than the second arc plate portion 32.

The second arc plate portion 32 is provided with a projecting member 5 (projecting portion) that projects inward at a portion closer to the other side in the circumferential direction (closer to the slit 3a). A plurality of projecting members 5 are provided at a plurality of positions spaced apart from each other in the axial direction of the second arc plate portion 32, two each at a plurality of positions spaced apart from each other in the circumferential direction.
The two projecting members 5 and 5 arranged in the circumferential direction at the same position in the axial direction are arranged so as to sandwich the connecting axis 7. In the present embodiment, the two projecting members 5 and 5 arranged in the circumferential direction at the same position in the axial direction are set to have substantially the same distance from the respective connecting axis 7.

Each of the projecting members 5 projects toward the other side of the connecting direction X. The tip portions of the two projecting members 5 and 5 arranged in the circumferential direction at the same position in the axial direction are arranged at substantially the same position in the connecting direction X.
The projecting member 5 is a flat plate-shaped steel plate, is inserted into a notch portion 321 formed in the second arc plate portion 32, and is welded to the second arc plate portion 32 from the outside of the first joint steel pipe 3. In the present embodiment, the projecting member 5 is provided so as to project inside the second arc plate portion 32, and only the welding allowance 51 is provided outside the second arc plate portion 32. In the projecting member 5, the length of the portion projecting inward from the second arc plate portion 32 (inner projecting length l ₁ ) is the length of the portion projecting outward from the second arc plate portion 32 (outer projecting length l ₂ ). ) Is provided so that it is longer than.
The first arc plate portion 31 is not provided with a member such as the protruding member 5.

In the second joint steel pipe 4, one edge of the connecting direction X is joined to the other edge of the steel pipe sheet pile main pipe 2 in the connecting direction X. The slit 4a of the second joint steel pipe 4 is formed on the other side of the depth direction Y and the other side of the connection direction X in the second joint steel pipe 4.
Of the circumferential direction of the second joint steel pipe 4, the side of the second joint steel pipe 4 facing the other side in the depth direction Y and the other side in the connection direction X from the joint portion 4b with the steel pipe sheet pile main pipe 2 is set as one side. The opposite side is the other side. The portion of the first joint steel pipe 3 extending from the joint portion 4b with the steel pipe sheet pile main pipe 2 to the slit 4a on one side in the circumferential direction is referred to as the third arc plate portion 41, and the portion extending on the other side in the circumferential direction is the fourth arc plate. It is referred to as a part 42. The third arc plate portion 41 is formed shorter in the circumferential direction than the fourth arc plate portion 42.
The second joint steel pipe 4 is not provided with a member such as the protruding member 5.

Such a steel pipe sheet pile 1 is driven into the ground in a direction in which the axial direction is the vertical direction, and the plurality of steel pipe sheet piles 1 are made to have their respective connecting axis 7 continuous to construct the steel pipe sheet pile well cylinder foundation 11. It is configured.
As shown in FIG. 3, the steel pipe sheet pile 1 on one side of the steel pipe sheet piles 1 adjacent to each other in the connecting direction X is referred to as the first steel pipe sheet pile 12, and the steel pipe sheet pile 1 on the other side is referred to as the second steel pipe sheet pile 13. It is assumed that the first steel pipe sheet pile 12 is arranged on one side of the connecting direction X of the second steel pipe sheet pile 13.
The joint portion (joint structure of the steel pipe sheet pile 1) 14 between the first steel pipe sheet pile 12 and the second steel pipe sheet pile 13 is the second joint steel pipe 4 of the first steel pipe sheet pile 12 and the first joint steel pipe 3 of the second steel pipe sheet pile 13. Are joined.
In the following description of the joint portion 14 between the first steel pipe sheet pile 12 and the second steel pipe sheet pile 13, "the first joint steel pipe 3 of the second steel pipe sheet pile 13" is referred to as "the first joint steel pipe 3", and "the first 1 The second joint steel pipe 4 of the steel pipe sheet pile 12 is referred to as a “second joint steel pipe 4”.

In the first joint steel pipe 3 and the second joint steel pipe 4, the second arc plate portion 32 of the first joint steel pipe 3 is arranged inside the second joint steel pipe 4 via the slit 4a, and the second joint steel pipe 4 is the second. 4 The arc plate portion 42 is arranged inside the first joint steel pipe 3 via the slit 3a, and is arranged so that the first joint steel pipe 3 and the second joint steel pipe 4 mesh with each other.
The portion of the second arc plate portion 32 of the first joint steel pipe 3 that is arranged inside the second joint steel pipe 4 is referred to as the first insertion plate portion 33, and of the fourth arc plate portion 42 of the second joint steel pipe 4. The portion arranged inside the first joint steel pipe 3 of the above is referred to as a second insertion plate portion 43.
The protruding member 5 of the first joint steel pipe 3 is provided in the first insertion plate portion 33, and is arranged inside the second joint steel pipe 4.

In the joint portion 14 between the first steel pipe sheet pile 12 and the second steel pipe sheet pile 13, the first joint space 141 sandwiched between the first insertion plate portion 33 and the second insertion plate portion 43 and the first joint steel pipe 3 are provided. A second joint space 142, which is an area other than the first joint space 141 inside, and a third joint space 143, which is an area other than the first joint space 141 inside the second joint steel pipe 4, are formed. The second joint space 142 is arranged on one side of the connecting direction X of the first joint space 141, and the third joint space 143 is arranged on the other side of the connecting direction X of the first joint space 141.
In the present embodiment, the projecting member 5 is provided on the first insertion plate portion 33 and projects toward the second insertion plate portion 43. As a result, even if the first insertion plate portion 33 and the second insertion plate portion 43 are close to each other, the protruding member 5 comes into contact with the second insertion plate portion 43 and does not come close to the dimension of the protruding member 5 or more. The first joint space 141 can be set to a desired size.
Mortar 6 is injected into the first joint space 141, the second joint space 142, and the third joint space 143, respectively. Note that FIG. 3 shows the joint portion 14 before the mortar 6 is filled in the first joint space 141, the second joint space 142, and the third joint space 143.

At the time of construction of the steel pipe sheet pile 1, before injecting the mortar 6 into the first joint space 141, the second joint space 142, and the third joint space 143, the inside of the first joint steel pipe 3 and the second joint steel pipe 4 is inserted. Cleaning is performed by the cleaning nozzle 15 inserted from above. At the time of cleaning, cleaning is performed by the cleaning nozzles 15 inserted in the first joint space 141, the second joint space 142, and the third joint space 143, respectively. In the present embodiment, two projecting members 5 and 5 arranged in the circumferential direction at the same position in the axial direction are arranged in the first joint space 141, but the distance between these two projecting members 5 is cleaned. The nozzles 15 are set at intervals where they can be arranged.

Next, the operation and effect of the joint structure of the steel pipe sheet pile 1 according to the first embodiment described above will be described with reference to the drawings.
In the joint structure of the steel pipe sheet pile 1 according to the first embodiment described above, the first insertion plate portion 33 is provided with the projecting member 5, so that the first insertion plate portion 33 and the second insertion plate portion 43 are provided. The interval can be made larger than the protruding dimension of the protruding member 5, and can be a desired size.
Further, since the projecting member 5 projects larger than the width of the slit 4a of the second joint steel pipe 4, it is possible to prevent the projecting member 5 from passing through the slit 4a of the second joint steel pipe 4, and the projecting member 5 can be prevented from passing through the slit 4a of the second joint steel pipe 4. It is possible to prevent the first insertion plate portion 33 provided with the 5 from coming out of the second joint steel pipe 4. As a result, it is possible to prevent the first joint steel pipe 3 and the second joint steel pipe 4 from coming off from each other.
Further, since the first insertion plate portion 33 is provided with the two projecting members 5, the distance between the first insertion plate portion 33 and the second insertion plate portion 43 can be surely secured.

Further, the protruding member 5 is inserted into the notch portion 321 formed in the second arc plate portion 32 and welded to the first joint steel pipe 3 from the outside of the first joint steel pipe 3. As a result, the protruding member 5 can be easily welded to the first joint steel pipe 3.
Further, the projecting member 5 is provided so as to project inside the second arc plate portion 32, and only the welding allowance 51 is provided outside the second arc plate portion 32. As a result, the portion of the protruding member 5 provided on the outside of the first joint steel pipe 3 can be made smaller, so that the steel pipe sheet pile 1 can be easily transported and lifted.

Further, at the distance between the two projecting members 5 arranged at the same position in the axial direction, a cleaning nozzle for cleaning the first joint space 141 between the first insertion plate portion 33 and the second insertion plate portion 43 is provided. It is configured so that 15 can be arranged. As a result, the first joint space 141 can be easily cleaned.

(Other embodiments)
Next, other embodiments will be described with reference to the accompanying drawings, but the same members and parts as those of the above-mentioned first embodiment will be referred to with the same reference numerals, and the description thereof will be omitted. A different configuration will be described.

(Second Embodiment)
As shown in FIG. 4, in the joint structure of the steel pipe sheet pile according to the second embodiment, the first joint steel pipe 3B and the second joint steel pipe 4B of the steel pipe sheet pile 1B are provided at a plurality of positions spaced apart from each other in the axial direction. The protruding members 5B are provided one by one.
The projecting member 5B attached to the first joint steel pipe 3 is referred to as a first projecting member 55B, and the projecting member 5B attached to the second joint steel pipe 4 is referred to as a second projecting member 56B.

The first protruding member 55B is a flat plate-shaped steel plate, is inserted into a notch portion 321 formed in the second arc plate portion 32, and is welded to the second arc plate portion 32 from the outside of the first joint steel pipe 3B. .. The first projecting member 55B is provided so as to project inside the second arc plate portion 32, and only the welding allowance 51 is provided on the outside of the second arc plate portion 32. Also in the second embodiment, in the projecting member 5B, the length of the portion projecting inward from the second arc plate portion 32 (inner projecting length l ₃ ) is the length of the portion projecting outward from the second arc plate portion 32. It is provided so as to be longer than (outer protrusion length l ₄ ).
The first projecting member 55B is provided at an intermediate portion in the circumferential direction of the second arc plate portion 32. The first protruding member 55B is located at a position near one end of the first insertion plate portion 33 inserted inside the second joint steel pipe 4B in the circumferential direction (near the end on the side separated from the slit 3a). When the first insertion plate portion 33 is inserted into the second joint steel pipe 4B, it is arranged in the vicinity of the slit 4a of the second joint steel pipe 4B.

The first projecting member 55B protrudes from the second arc plate portion 32 in an oblique direction toward one side in the depth direction Y gradually toward the other side in the connecting direction X. The first protruding member 55B is formed to be larger than the slit 4a width of the second joint steel pipe 4B, and when the first insertion plate portion 33 of the first joint steel pipe 3B is inserted into the second joint steel pipe 4B, the first 1 The insertion plate portion 33 is set so as not to come off from the second joint steel pipe 4B.

The second protruding member 56B is a flat plate-shaped steel plate, is inserted into a notch portion 421 formed in the fourth arc plate portion 42, and is welded to the fourth arc plate portion 42 from the outside of the second joint steel pipe 4B. .. The second projecting member 56B is provided so as to project inside the fourth arc plate portion 42, and only the welding allowance 51 is provided on the outside of the fourth arc plate portion 42.
The second protruding member 56B is provided at an intermediate portion in the circumferential direction of the fourth arc plate portion 42. The second protruding member 56B is located at a position near one end of the second insertion plate portion 43 inserted inside the first joint steel pipe 3B in the circumferential direction (near the end on the side separated from the slit 4a). When the second insertion plate portion 43 is inserted into the inside of the first joint steel pipe 3B, it is arranged in the vicinity of the slit 3a of the first joint steel pipe 3B.

The second protruding member 56B protrudes from the first arc plate portion 31 in an oblique direction toward one side in the depth direction Y gradually toward the other side in the connecting direction X. The second protruding member 56B is formed to be larger than the slit 3a width of the first joint steel pipe 3B, and when the second insertion plate portion 43 of the second joint steel pipe 4B is inserted into the inside of the first joint steel pipe 3B, the second protrusion member 56B is formed. 2 The insertion plate portion 43 is set so as not to come off from the first joint steel pipe 3B.

In the present embodiment, the first projecting member 55B and the second projecting member 56B are formed in substantially the same shape, and the position and angle at which the first projecting member 55B is attached to the second arc plate portion 32 and the second. The position and angle at which the projecting member 56B is attached to the first arc plate portion 31 are set to be substantially the same. Therefore, the first joint steel pipe 3B and the second joint steel pipe 4B are formed in a shape symmetrical with respect to the central axis of the steel pipe sheet pile main pipe 2.

In the joint portion 14B of the steel pipe sheet piles 1B and 1B adjacent to each other in the connecting direction X, the first protruding member 55B is arranged in the vicinity of the slit 4a of the second joint steel pipe 4B, and the second protruding member 56B is the slit of the first joint steel pipe 3B. It is arranged in the vicinity of 3a.
When the first joint steel pipe 3B and the second joint steel pipe 4B of the steel pipe sheet piles 1B and 1B placed adjacent to each other are joined, the first protruding member 55B and the second protruding member 55B are viewed from the vertical direction (axial direction). The members 56B are arranged in parallel with a space in the depth direction Y. The distance between the first protruding member 55B and the second protruding member 56B when viewed from the vertical direction is for cleaning the first joint space 141 between the first insertion plate portion 33 and the second insertion plate portion 43. The cleaning nozzle 15 is set to a size that can be arranged.

The joint structure of the steel pipe sheet pile according to the second embodiment has the same effect as that of the first embodiment.
Further, in the joint structure of the steel pipe sheet pile according to the second embodiment, the first joint steel pipe 3B and the second joint steel pipe 4B are formed in a shape symmetrical with respect to the central axis of the steel pipe sheet pile main pipe 2. As a result, in the steel pipe sheet pile 1B, the joint steel pipe on one side in the arrangement direction becomes the first joint steel pipe 3B and the joint steel pipe on the other side becomes the second joint depending on the orientation cast when constructing the steel pipe sheet pile well cylinder foundation 11. It becomes a steel pipe 4B. Therefore, when placing the steel pipe sheet pile 1B, it is not necessary to confirm in which direction the first joint steel pipe 3B and the second joint steel pipe 4B are arranged in the arrangement direction, and it is easy to construct the steel pipe sheet pile well cylinder foundation 11. It can be carried out.

(Third Embodiment)
As shown in FIG. 4, in the joint structure of the steel pipe sheet pile according to the third embodiment, similarly to the joint structure of the steel pipe sheet pile according to the second embodiment, the first joint steel pipe 3C and the second joint steel pipe 4C of the steel pipe sheet pile 1C are respectively. The protruding members 5C are provided one by one at a plurality of positions spaced apart from each other in the axial direction of the above.
The projecting member 5C attached to the first joint steel pipe 3C is referred to as a first projecting member 55C, and the projecting member 5C attached to the second joint steel pipe 4C is referred to as a second projecting member 56C.

The first protruding member 55C is a flat plate-shaped steel plate, is inserted into the notch portion 321 formed in the second arc plate portion 32, and is welded to the second arc plate portion 32 from the outside of the first joint steel pipe 3C. .. The first projecting member 55C is provided so as to project inside the second arc plate portion 32, and only the welding allowance 51 is provided on the outside of the second arc plate portion 32. Also in the third embodiment, in the projecting member 5C, the length of the portion projecting inward from the second arc plate portion 32 (inner projecting length l ₅ ) is the length of the portion projecting outward from the second arc plate portion 32. It is provided so as to be longer than (outer protrusion length l ₆ ).
The first projecting member 55C is provided at a position near the other end of the second arc plate portion 32 in the circumferential direction (near the end on the side close to the slit 3a).
The first projecting member 55C projects from the second arc plate portion 32 in an oblique direction toward the other side in the connecting direction X and gradually toward the other side in the depth direction Y. The first protruding member 55C is formed to be larger than the slit 4a width of the second joint steel pipe 4C, and when the first insertion plate portion 33 of the first joint steel pipe 3C is inserted into the second joint steel pipe 4C, the first 1 The insertion plate portion 33 is set so as not to come off from the second joint steel pipe 4C.

The second protruding member 56C is a flat plate-shaped steel plate, is inserted into the notch portion 421 formed in the fourth arc plate portion 42, and is welded to the fourth arc plate portion 42 from the outside of the second joint steel pipe C. .. The second projecting member 56C is provided so as to project inside the fourth arc plate portion 42, and only the welding allowance 51 is provided on the outside of the fourth arc plate portion 42.
The second protruding member 56C is provided at a position near the end on one side in the circumferential direction of the fourth arc plate portion 42 (near the end on the side close to the slit 4a).
The second projecting member 56C projects from the first arc plate portion 31 in an oblique direction toward the other side in the connecting direction X and gradually toward the other side in the depth direction Y. The second protruding member 56C is formed to be larger than the slit 3a width of the first joint steel pipe 3C, and when the second insertion plate portion 43 of the second joint steel pipe 4C is inserted into the inside of the first joint steel pipe 3C, the second protrusion member 56C is formed. 2 The insertion plate portion 43 is set so as not to come off from the first joint steel pipe 3C.

Also in the present embodiment, as in the second embodiment, the first projecting member 55C and the second projecting member 56C are formed in substantially the same shape, and the first projecting member 55C is attached to the second arc plate portion 32. The position and angle at which the second projecting member 56C is attached are set to be substantially the same as the position and angle at which the second protruding member 56C is attached to the first arc plate portion 31. Therefore, the first joint steel pipe 3C and the second joint steel pipe 4C are formed in a shape symmetrical with respect to the central axis of the steel pipe sheet pile main pipe 2.

In the joint portion 14C of the steel pipe sheet piles 1C and 1C adjacent to each other in the connecting direction X, the first protruding member 55C is inside the second joint steel pipe 4C from the second protruding member 56C at a position separated from the slit 4a of the second joint steel pipe 4C. The second protruding member 56C is arranged at a position separated from the slit 3a of the first joint steel pipe 3C and at a position inside the first joint steel pipe 3C with respect to the first protruding member 55C.
When the first joint steel pipe 3C and the second joint steel pipe 4C of the steel pipe sheet piles 1C and 1C placed adjacent to each other are joined, the first protruding member 55C and the second protruding member 55C are viewed from the vertical direction (axial direction). The members 56C are arranged in parallel with a space in the depth direction Y. The distance between the first protruding member 55C and the second protruding member 56C when viewed from the vertical direction is for cleaning the first joint space 141 between the first insertion plate portion 33 and the second insertion plate portion 43. The cleaning nozzle 15 is set to a size that can be arranged.

The joint structure of the steel pipe sheet pile according to the third embodiment has the same effect as that of the above embodiment.
Further, in the joint structure of the steel pipe sheet pile according to the third embodiment, the position where the first protruding member 55C is separated from the slit 4a of the second joint steel pipe 4C and is inside the second joint steel pipe 4C than the second protruding member 56C. The second protruding member 56C is arranged at a position separated from the slit 3a of the first joint steel pipe 3C and at a position inside the first joint steel pipe 3C with respect to the first protruding member 55C. Therefore, when the first protruding member 55C and the second protruding member 56C are arranged at the same height, even if the first joint steel pipe 3C and the second joint steel pipe 4C are about to come off, the first protruding member When the 55C and the second protruding member 56C come into contact with each other, it is possible to prevent the first joint steel pipe 3C and the second joint steel pipe 4C from coming off.

Although the embodiment of the joint structure of the steel pipe sheet pile according to the present invention has been described above, the present invention is not limited to the above embodiment and can be appropriately changed without departing from the spirit of the present invention.
For example, in the above embodiment, the first joint steel pipes 3, 3B, 3C and the second joint steel pipes 4B, 4C are provided with projecting members 5, 5B, 5C made of flat steel, but the projecting members 5, 5B and 5C may be formed of a steel plate, a steel rod, a mold material, or the like other than flat steel.
Further, two projecting members 5, 5B, 5C are provided at the joint portion between the first joint steel pipes 3, 3B, 3C and the second joint steel pipes 4, 4B, 4C at intervals in the depth direction Y. , Two or more may be provided at intervals in the depth direction Y. Further, a plurality of protruding members 5, 5B, 5C are provided at intervals in the axial direction of the first joint steel pipes 3, 3B, 3C and the second joint steel pipes 4B, 4C, but only one is provided. May be good.

Further, in the above embodiment, the projecting members 5, 5B, 5C are inserted into the notches 321, 421 formed in the second arc plate portion 32 or the fourth arc plate portion 42, and the first joint steel pipe 3, It is welded from the outside to 3B, 3C and the second joint steel pipes 4B, 4C. On the other hand, the protruding members 5, 5B, 5C may be appropriately joined to the first joint steel pipes 3, 3B, 3C and the second joint steel pipes 4B, 4C. Further, the projecting members 5, 5B, 5C are the first joint steel pipes 3, 3B, 3C or the second joint provided with the projecting members 5, 5B, 5C from the second arc plate portion 32 or the fourth arc plate portion 42. It may be provided so as to project only inside the steel pipes 4B and 4C.
Further, in the above embodiment, the cleaning nozzle 15 for cleaning the first joint space 141 between the first insertion plate portion 33 and the second insertion plate portion 43 is provided at intervals of the projecting members 5, 5B, 5C. Is configured so that it can be placed, but it does not have to be configured in this way.

Further, in the above embodiment, the steel pipe sheet pile main pipe 2, the first joint steel pipes 3, 3B, 3C and the second joint steel pipes 4, 4B, 4C have substantially the same axial dimensions, respectively. It may have different dimensions. Further, the diameter and the length in the axial direction may be different between the first joint steel pipes 3, 3B, 3C and the second joint steel pipes 4, 4B, 4C.

1 Steel pipe sheet pile 2 Steel pipe sheet pile Main pipe 3,3B, 3C 1st joint steel pipe 3a Slit 4,4B, 4C 2nd joint steel pipe 4a Slit 5,5B, 5C Protruding member (protruding part)
12 1st steel pipe sheet pile 13 2nd steel pipe sheet pile 14 Joint part 15 Cleaning nozzle 33 1st insertion plate part 43 2nd insertion plate part 51 Welding allowance 55B, 55C 1st protruding member (protruding part)
56B, 56C Second protruding member (protruding part)
141 1st joint space 142 2nd joint space 143 3rd joint space 321 Notch 421 Notch l _1, l _3, l ₅ Inner protrusion length l _2, l _4, l ₆ Outer protrusion length

Claims (3)

The first joint steel pipe of the adjacent first steel pipe sheet pile and the second joint steel pipe of the second steel pipe sheet pile are fitted together through slits formed in the respective axial directions.
The first insertion plate portion inserted inside the second joint steel pipe of the first joint steel pipe and the second insertion plate portion inserted inside the first joint steel pipe of the second joint steel pipe. In the joint structure of steel pipe sheet piles, which are arranged facing each other at intervals.
At least one of the first insertion plate portion and the second insertion plate portion is provided with a protrusion portion that protrudes larger than the width of the slit on the opposite insertion plate portion side.
The protrusions are spaced apart from each other in a direction in which the first insertion plate portion and the second insertion plate portion face each other and in a direction intersecting both the axial direction of the first joint steel pipe and the second joint steel pipe. Multiple
A notch is formed in at least one of the first insertion plate portion and the second insertion plate portion where the protrusion is provided.
The protrusion is inserted through the notch and welded to the first joint steel pipe or the second joint steel pipe from the outside.
The portion of the protruding portion arranged outside the first joint steel pipe or the second joint steel pipe is a welding allowance for welding the protruding portion to the first joint steel pipe or the second joint steel pipe from the outside. The joint structure of the steel pipe sheet pile, which is characterized by being only . The joint structure of a steel pipe sheet pile according to claim 1 , wherein the protruding portion has an inner protruding length of the first joint steel pipe or the second joint steel pipe provided with the protruding portion larger than the outer protruding length. A claim is characterized in that a cleaning nozzle for cleaning a space between the first insertion plate portion and the second insertion plate portion can be arranged at a distance between adjacent protrusions. The joint structure of the steel pipe sheet pile according to 1 or 2 .

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