JP4879642B2 - Steel sheet pile joint fitting structure and steel sheet pile wall - Google Patents

Description

The present invention relates to a technology for constructing a waterstop wall that requires waterstop, such as a peripheral revetment and a partition wall revetment of a waste disposal site, and a water barrier wall of a dike using a steel sheet pile having a Larzen type joint, in particular, about the joint fitting structure and steel sheet pile wall of steel sheet piles.

  Conventionally, as a method for increasing the water stoppage of a steel sheet pile, a water-expandable water stop material as disclosed in Patent Document 1 or Patent Document 2 is applied in advance before placing the steel sheet pile in the soil. The method is generally widely used. However, in this method, when the steel sheet pile is placed in the soil or the like, the joints of the steel sheet piles come into contact with each other, so that the water-absorbing and expanding water-stopping material may be peeled off and may not exhibit sufficient water-stopping performance. .

  In order to solve the above-mentioned problem, in Patent Document 3, male and female joints to be fitted to each other are formed into non-identical shapes by cutting the claws of the joint, or in Patent Document 4, a spacing holding projection is provided in the joint portion. Discloses a method for minimizing peeling of the water-swellable water-stopping material. In Patent Document 5, in order to confirm water leakage due to breakage such as peeling of the water-swellable water-stopping material, a water leakage detection gap is provided on at least one side with respect to the fitting portion of the steel sheet pile, and the water leakage in the gap portion is provided. It is possible to detect water leakage as a water blocking wall. In addition, when water leakage is detected, the detection gap can be sealed with a sealing material to block the water leakage.

  Further, in Patent Document 6, as seen in a cross-sectional view, a male-female identical joint in which a concave groove is formed in the axial length direction of the fitting inscribed portion of the joint, and the concave groove is filled with a water-expandable sealing material. A steel sheet pile having is disclosed. In the above prior art, since the water-expandable sealing material is accommodated in the concave groove at the time of placing, even when the steel sheet pile is placed in the soil or the like, the water-swellable expansion stop is caused by the contact of the steel sheet pile joint. It is said that good water-stopping property is maintained because the water material does not peel off. However, in this method, since the concave groove is relatively small in size, the amount of the water-stopping material is small, and there is a possibility that the water-proof material may not have sufficient water-stopping. In Patent Document 7, as shown in FIG. Further, there is disclosed a steel sheet pile having a special claw shape formed by forming a concave groove 28 by hot rolling on a claw bottom inner surface portion of a claw portion 27 of a steel sheet pile 26 in a sectional view. According to this method, the size of the concave groove 28 can be ensured to 10 mmφ in a sectional view, and the water stop material 29 can be injected.

By the way, when constructing a wall by connecting many steel sheet piles 26 having concave grooves 28 in the axial length direction of the fitting inscribed portion in the lateral (horizontal) direction, as shown in FIG. In addition, the water-expandable sealing material (water-stopping material 29) is filled in the concave groove 28 in advance before construction, and then the water-stopping material 29 is expanded to fill the space of the inscribed portion. Will be watered. However, such a construction method is affected by the contact between steel sheet piles or the entering earth and sand at the time of placing, so that a sufficient amount of the water-stopping material 29 is not necessarily retained at the filled position to exert the water-stopping effect. There is no confirmation to do. Also, in the construction of sea surface disposal sites, etc., the steel sheet piles will protrude from the seabed for a long time until the revetment work is completed after placing the steel sheet piles from the sea. There was also a concern that the steel sheet pile was beaten and the water-stopping material filled in the joint was damaged. For such a problem, in Patent Document 8, in the nail bottom inner surface portion, a steel sheet pile having a special nail shape formed by forming a concave groove by hot rolling, after placing the steel sheet pile into the soil, When the revetment work is completed and the steel sheet pile is stabilized, a method of filling the water-stopping material using the gap is disclosed.
Japanese Unexamined Patent Publication No. 60-258281 JP-A-1-168766 Japanese Patent Laid-Open No. 2000-192452 JP 2000-192451 A Japanese Patent Laid-Open No. 2003-82655 Japanese Utility Model Publication No.3-128725 JP 2003-160929 A JP 2003-160930 A "Steel sheet pile from design to construction" Steel Pipe Pile Association Revised March 2000, pp.6-7

  In the prior art shown in Patent Document 7 and the like, the steel sheet pile having a special claw shape formed by forming a concave groove in the nail bottom by hot rolling can secure a relatively large concave groove. , A rolling roll for manufacturing a special claw-shaped steel sheet pile, etc. A new manufacturing facility is required, and the manufacturing difficulty is very high, resulting in an increase in the cost for manufacturing the steel sheet pile.

In view of such circumstances, the present invention uses a steel sheet pile having a joint that minimizes a shape change in a general Ralzen joint without using a special claw shape, and the steel sheet pile is placed in the soil. Then, it aims at providing the joint fitting structure and steel sheet pile wall of the steel sheet pile which can be filled in the space of a joint part without stopping a water stop material from upper direction to the downward direction.

In order to solve the above problems, the present invention is configured as follows.
1st invention has a nail | claw root part which has only one nail | claw part at the front-end | tip, and is connected to the nail | claw part, and has the right and left larsen type joint of a substantially symmetrical shape when the nail | claw root | base part height is made the same. a joint fitting structure of the steel sheet pile, the claw base portion height of one of the joints in the joint to be fitted with each other, rather higher than the claw base portion height of the other joint, and the claw base portions of the one joint The height is smaller than the joint bottom width of the joint, and the claw part of the one joint is in contact with the joint bottom part of the other joint, and the joint bottom part of one joint and the claw part of the other joint are An air gap for inserting the injection tube is formed between them.
2nd invention WHEREIN: In the joint fitting structure of the steel sheet pile by 1st invention, the nail | claw root part height of one joint is 10 mm or more higher than the claw root part height of the other joint, It is characterized by the above-mentioned. .
According to a third aspect of the present invention, there is provided a steel sheet pile joint fitting structure according to any one of the first and second aspects of the invention. The gap formed between the inner surface and the inner surface is characterized in that a circular member having a diameter of 10 mm or more can be installed.
4th invention is a steel sheet pile wall which has the joint fitting structure of the steel sheet pile by the invention in any one of 1st to 3rd, Comprising: In each steel sheet pile which comprises a steel sheet pile wall, the nail | claw of the joint of one side The base height is higher than the claw root height of the other joint.
A fifth invention is a steel sheet pile wall having a steel sheet pile joint fitting structure according to any one of the first to third inventions, wherein the steel sheet pile wall comprises a first steel sheet pile and a second steel sheet pile. The joints on both sides of the first steel sheet pile are configured to be alternately arranged, and the height of the claw roots is higher than the joints on both sides of the second steel sheet pile.
In the steel sheet pile wall of the sixth invention, the steel sheet pile wall of the fourth invention or the fifth invention, wherein the nail outer surface of the one joint and the other joint according to the difference in height of the claw root A water stop material is filled in a gap formed between the inner surface of the joint part.

According to the steel sheet pile joint fitting structure and steel sheet pile wall of the present invention, the claws of the steel sheet pile can be obtained by simply changing the shape of a general-purpose larsen joint steel sheet pile without using a special claw-shaped sheet pile. It is possible to secure a gap in which a water-stopping material injection pipe of about 10 mmφ can be inserted when the is fitted. Therefore, using a sheet pile with a low production cost, a steel sheet pile can be injected into the gap of the fitting joint after the steel sheet pile is placed in water or in the soil, so that the steel with a high water-stopping property can be used. The sheet pile wall can be constructed at low cost.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 and FIG. 2 show a Larsen type joint of a steel sheet pile manufactured by hot rolling. The name of each part of the joint part of a steel sheet pile will be described with reference to FIG. The steel sheet pile joints are divided into five parts from the tip and are called claw part 1a, claw root part 1b, joint bottom part 1c, joint root part 1d, and joint base part 1e, respectively. Further, a portion surrounded by the curved joint is defined as a fitting groove 2, and the fitting groove side of the joint is defined as a joint portion inner surface 3, and the opposite side is defined as a joint portion outer surface 4. In the claw portion 1a, the tip side is the claw tip portion 5, and the width direction 6 and the thickness direction 7 of the claw portion 1a are directions defined by arrows in the drawing. The portion that protrudes most in the thickness direction 7 of the joint outer surface 4 of the claw portion 1a is referred to as a claw top portion 8. Furthermore, the joint part outer surface 4 side of the claw part 1a is referred to as a claw part outer surface 1a '.

  In FIG. 2, the dimension which prescribes | regulates the shape of the nail | claw part of a steel sheet pile is shown in figure. The minimum gap between the claw tip 5 and the joint base 1e is the joint fitting width Pw. For the claw, the maximum horizontal width Hw, claw plate thickness T, claw plate width Nw, claw root height Jh, and fitting The bottom width Bw is defined as shown in FIG.

In the fitting structure of the present invention, in a state where the claws of the joints making a pair are fitted, one of the larsen type is formed so that a claw shape into which an injection pipe of about φ10 mm can be inserted into the fitting portion. The nail root height Jh is higher than that of the other Larsen type joint.
At this time, for example, when the other Ralzen joint is manufactured by a conventional method for manufacturing a Ralzen joint, only one of the Ralzen joints is increased by a new manufacturing method to increase the claw root height Jh. What is necessary is just to manufacture and it is preferable from the surface of cost or productivity.

  In the following description, a case in which a joint having a lower claw root height Jh is used as a conventional Ralzen joint (referred to as a conventional Ralzen joint) will be described as an example.

FIG. 3 shows the shape of one joint in the steel sheet pile joint fitting structure of the first embodiment according to the present invention, and the claw root height Jh of the claw root 1b of the joint is about 10 mm or more. , Higher than that of the other conventional Larsen joint. On the other hand, in the other conventional Larsen joint as shown in FIG. 2, the claw root portion 1b functions only as a bent portion for forming the fitting groove 2 by bending the claw portion 1a toward the joint base portion 1e. However, the claw root height Jh was determined only by the thickness of the joint bottom 1c and the curvature at the time of bending.

  FIG. 4 shows a steel sheet pile joint fitting structure in the first embodiment, in which one joint A having a raised claw root height is fitted to the other conventional Ralzen joint B. It is a figure which shows a state.

  As shown in FIG. 4 (a), the claw root height Jh of the joint A is increased so that the outer surface 1a 'of the joint B and the joint A of the joint A are inside the joint groove 2 of the joint A. A relatively large gap 11 can be formed on the inner surface 3.

In FIG. 4 (a), the fitting state in which the gap 11 is the smallest is shown, but even in that case, the gap 11 is large enough to install a circular member 12 having a diameter of 10 mm or more. An injection tube for filling the water material can be inserted. 4 (b) shows another fitting state in which the gap 11 is assumed to be small, but the installation position of the circular member 12 of φ10 mm or more is slightly shifted, but it is sufficiently filled with a water stop material of about φ10 mm An injection tube can be inserted.
In one joint in the steel sheet pile joint fitting structure according to the present invention (joint A in the example of FIG. 4A), the height of the claw root height Jh is the same as that of the other conventional Larsen joint (FIG. In the example of 4 (a), the height is about 10 mm or more higher than that of the joint B), but the height is secured for inserting a circular member or an injection pipe for filling a water stop material. is there. Therefore, the size of the circular member or injection pipe is restricted by the width of the joint bottom width Bw in addition to the height of the claw root height Jh, and the claw root height Jh is not less than the joint bottom width Bw. There is no need for height, and it is desirable that the width is smaller than the width of the joint bottom width Bw because the gap does not become extremely large.
Therefore, the height of the claw root portion Jh of one joint is preferably about 10 mm or more higher than that of the other conventional Larzen joint, and preferably smaller than the width of the joint bottom width Bw. The gap formed between the outer surface of the claw part of the one joint and the inner surface of the joint part of the other joint due to the difference in the height of the base part is not less than 10 mm in diameter in the direction of the height of the base part of the joint. The width is equal to or less than the width, and in the joint bottom width Bw direction, the gap is the joint bottom width, and a circular member having a smaller dimension can be installed in either direction.

  On the other hand, if only the height of the claw root Jh is increased, even if the steel sheet pile joints A and B are about to be detached, the claw is larger than the joint opening width Pw as shown in FIG. Since the maximum horizontal width Hw of the part is large, the joint does not easily come off. The joint A has a higher claw root height Jh, but the joint opening width Pw and the maximum horizontal width Hw have not changed significantly from the conventional joint B, and a force acts in the direction in which the joints A and B come off. Even in this case, the resistance strength does not change.

  Next, while fitting the claws of these joints A and B, they are placed in the water or in the ground. At this time, an injection tube for filling the water stop material later is inserted into the gap 11 of the fitting portion at the same time when the steel sheet pile is driven. When the steel sheet pile is fitted, the claw shape ensures a space in which the injection pipe of about φ10 mm can be inserted. Therefore, the injection pipe can be easily inserted even when placing the steel sheet pile. For the injection pipe, a steel pipe or a hose is used depending on the ground conditions and construction method. Normally, the outer diameter of the injection pipe that can be filled with filler is the minimum diameter of φ8-9mm, and if there is a gap where a circular member of φ10mm can be installed in the fitting fitting groove, the injection pipe can be easily inserted The filler can be injected.

  Of course, the injection pipe may be inserted into the gap 11 in the fitting portion after the steel sheet pile is placed. However, in the soil, when the earth and sand enter the joint, the injection pipe is inserted later. Inserting the injection tube at the same time as the steel sheet pile is inserted, or inserting a slightly larger rod-shaped gap retainer at the time of steel sheet pile insertion After securing the gap 11, it is preferable to pull out the rod-shaped gap holding material when the filler is injected and insert the injection tube later. Since the gap 11 of the joint fitting part changes depending on the fitting condition, a rod-shaped gap holding material slightly larger than the injection tube is sufficient if a circular member with a diameter of 10 mm can be installed even when the gap 11 is the smallest. It can be inserted into this gap.

  The rod-shaped gap holding material is not particularly limited as long as it is long and can be inserted into and pulled out from the gap, but a round steel bar is preferable from the viewpoint of cost, availability, and the like. In the construction of steel sheet pile walls, when connecting steel sheet piles, not only when placing one steel sheet pile in order while fitting the joints, but after connecting multiple steel sheet piles before placing In some cases, the connected steel sheet piles may be driven. In the latter case, it is desirable to insert a rod-shaped gap retaining material together when connecting a plurality of steel sheet piles.

    FIG. 5 shows a steel sheet pile and a part of the steel sheet pile wall in the second embodiment of the present invention.

  As shown in FIG. 5 (a), the steel sheet pile 20 of the present invention has a joint A having a high claw root height Jh on one side of the steel sheet pile and a low claw root height Jh on the other side (for example, Conventional type) Ralzen joint B. The claw root height 21 of the joint A is about 10 mm or more higher than the claw root height 22 of the other conventional joint B. FIG. 5 (b) shows a case where a steel sheet pile wall is configured using the steel sheet pile 20 of the present invention. By connecting the steel sheet piles 20 so that the joint A of the present invention and the conventional joint B fit in the adjacent steel sheet piles 20, the gap 11 can be secured.

  FIG. 6 shows a steel sheet pile wall and a steel sheet pile used therefor in the third embodiment of the present invention.

  As shown in FIG. 6 (a), the steel sheet pile 24 used in the present embodiment has a claw root height Jh in both the joint A on the one side and the other joint A ′ of the steel sheet pile, for example, a conventional Larsen joint. Has a higher joint. The joint A and the joint A 'on both sides have substantially the same shape, so that the claw root heights 21 and 23 are substantially the same height, which is about 10 mm or more higher than that of the conventional Ralzen joint. FIG. 6 (b) shows a part of the steel sheet pile wall in the present embodiment. In the present embodiment, unlike the second embodiment, since one type of steel sheet pile cannot have a gap, the joint having a high claw root height Jh shown in FIG. 6A is provided on both sides. A steel sheet pile 24 and a steel sheet pile 25 having a lower claw root height Jh (for example, a steel sheet pile having a conventional Ralzen joint) are required.

  Specifically, for example, a steel sheet pile 25 having a low Jh, for example, a conventional Larsen type joint, is adjacent to a steel sheet pile 24 with a high Jh, and a joint between a steel sheet pile 24 with a high Jh and a steel sheet pile 22 with a low Jh. The steel sheet pile 24 and the steel sheet pile 25 are connected so that B fits. Next, a steel sheet pile 24 with high Jh is adjacent to and connected to the steel sheet pile 25 with low Jh. As a result, every other steel sheet pile wall has a steel sheet pile 24 with a high Jh and a steel sheet pile 25 with a low Jh, so that in each joint fitting part, a joint A with a high Jh and a joint B with a low Jh are formed. The gap 11 can be secured by fitting.

Next, FIG. 7 shows the joint fitting structure of the steel sheet pile in the fourth reference embodiment.

In the first to third embodiments , the waterstop material fills the gap 11 generated in the joint groove 2 when the joints are fitted to each other, but in this reference embodiment, in addition to that, FIG. ) Of the joint part outer surface 4 of the claw part 1a of the joint A (particularly the claw part outer surface as shown in the figure is preferable) and the joint inner surface 3 of the joint bottom part 1c of the joint B as shown in FIG. A concave groove 14 is drilled along the longitudinal direction of the steel sheet pile at any one or two or more locations. This concave groove 14 is pre-filled with a water-swellable water-stopping material 15 before placing the steel sheet pile, and can be used in combination with the water-stopping material filling process using the injection pipe described above, thereby providing a more reliable water-stopping effect. Can be played.
That is, the water-swellable water-stopping material 15 expands in volume when water enters after pouring and covers the periphery of the concave groove 14, so that the water-stopping material 15 is stopped by the injection pipe 12 as shown in FIG. Since the water stop material 15 is also filled in the air gap 16 on the opposite side of the air gap 11 into which the material is injected, it becomes possible to stop the water twice in the water pipe 13 between the steel sheet pile joints. Reliability is further improved. FIG. 7 (c) shows a state in which the fourth reference embodiment shown in FIGS. 7 (a) and 7 (b) is applied to the steel sheet pile 20. FIG.

  Also, facing the gap 11 filled with the water-stopping material by the injection pipe, at one or more of the joint inner surface 3 of the joint bottom 1c of the joint A and the joint outer surface 4 of the claw 1a of the joint B A concave groove may be formed along the longitudinal direction of the steel sheet pile. In this case, when the water-stopping material filled with the injection pipe is not partly filled or when the water-stopping material filled with the injection pipe deteriorates, the water stoppage deteriorates, When water enters the water-stopping material filling portion, the water-expandable water-stopping material previously filled in the concave groove expands in volume, and water-stopping performance can be maintained.

The manufacturing method of the steel sheet pile which has the joint used in the joint fitting structure of the steel sheet pile shown in these 1st-4th forms and the said joint is shown below.

  The larsen steel sheet pile is shaped by a rolling process as shown in FIG. 12, for example. That is, the rectangular cross section M0 is used as a raw material, and this is heated to a predetermined temperature that can be rolled by the heating furnace 31, and the rough cross section M1 is formed by the double breakdown rolling mill 32. Further, after forming the intermediate section m by the double first intermediate rolling mill 33 and the second intermediate rolling mill 34 using the rough section M1 as a raw material, the final product section f is formed by the double finishing rolling mill 35. To do. Note that the steel sheet pile joint part is formed by rolling load with the upper and lower rolls up to the intermediate section m, except for the joint part, and finally the joint is bent inward by the double finish rolling mill 35 to form a Larsen type joint. Mold.

FIG. 13 shows in more detail the forming method using a double finish rolling mill. When the intermediate cross section m moves in the double finish rolling mill, the upper roll 36a moves from top to bottom. Similarly, the lower roll 37b moves upward from below. At this time, the upper roll first comes into contact with the joint outer side 38 portion of the intermediate cross section m, and receives a force 39 for bending the joint inward to cause bending deformation inward. The upper roll 36a and the lower roll 37b are moved to the positions of the upper roll 36b and the lower roll 37a at the stage of forming the final product cross section f, and finally, a joint of a Larsen type steel sheet pile is formed. These methods are known as a method for forming a general Larsen type joint, but can also be applied to the final product cross section f in the present invention, and the required dimensions depend on the dimensions of the final product cross section, Rollable.
(Example)
As a joint having a low claw root height, a joint of a III-shaped U-shaped steel sheet pile having a Ralzen type joint described in Non-Patent Document 1 shown in FIG. As shown below, an example in which the joint A and the joint B are fitted using the joint A shown in FIG. 9 having substantially the same shape as the joint of FIG.

  In the joint B shown in FIG. 8, the claw root height Jh was 13.7 mm. Further, the joint fitting width Pw of the joint B was 31.9 mm, and the maximum horizontal width Hw of the claw portion was 51.3 mm.

  In the joint A shown in FIG. 9, the claw root height Jh is 16.3 mm higher than that of the joint B, and Jh is 35.0 mm. Similarly, the joint fitting width Pw of the joint A was 34.2 mm, and the maximum horizontal width Hw of the claw portion was 51.4 mm. The joint fitting width Pw is somewhat larger, but this steel sheet pile is affected by the inclination of the joint base 1e.

The joint A was manufactured by the rolling process shown in FIG. FIG. 10 shows the result of fitting the joint A and the joint B so that the gap 11 between the joints is minimized.
As a result, it was confirmed that the minimum distance between the gaps 11 could be 12 mm and that a circular member 12 with a diameter of 10 mm could be installed in the gap 11.

It is the figure which showed the name of the joint part of the steel sheet pile which concerns on this invention. It is the figure which showed the name of the joint part of the steel sheet pile which concerns on this invention. FIG. 3 is a view showing a steel sheet pile joint used in the first embodiment of the present invention. (a), (b), (c) is a view showing a joint fitting structure of steel sheet piles in the first embodiment of the present invention. (a), (b) is the figure which showed a part of steel sheet pile and steel sheet pile wall in 2nd Embodiment of this invention. (a), (b) is the figure which showed the steel sheet pile wall and the steel sheet pile used in 3rd Embodiment of this invention. (a), (b), (c) is a diagram showing a steel sheet pile joint fitting structure and a steel sheet pile in a fourth reference embodiment of the present invention . It is the figure which showed the coupling | joint with the lower nail | claw root part height used in the Example. It is the figure which showed the coupling | joint with a higher nail | claw root part height used in the Example. It is the figure which showed the joint fitting structure of the steel sheet pile in an Example. It is the figure which showed the conventional water-stopping steel sheet pile. It is a figure which shows the rolling modeling process which is a manufacturing method of the joint used in the joint fitting structure of the steel sheet pile shown to the 1st-4th form and the steel sheet pile which has the said joint. It is the figure which showed the detailed shaping | molding method of the double type finish rolling mill in FIG.

Explanation of symbols

1a Claw
1a 'Claw outer surface
1b Nail root
1c Joint bottom
1d Joint base
1e Joint base part 2 Fitting groove 3 Joint part inner surface 4 Joint part outer surface 5 Claw tip part 6 Claw part width direction 7 Claw part thickness direction 8 Claw top part 11 Cavity 12 Circular member 13 Water supply 14 Concave groove 15 Water stop material 16 Cavity 20 Steel sheet pile 21 Claw root height 22 of the joint according to the present invention Claw root height 23 of the joint according to the present invention 24 Claw root height 24 of the joint according to the present invention 25 Steel sheet pile 25 according to the present invention Conventional steel sheet pile 26 Steel Sheet pile 27 Claw 28 Recessed groove 29 Water stop material
Pw fitting mating width
Hw maximum horizontal width
Nw Nail plate width
T Nail thickness
Jh Nail root height
Bw Joint bottom width
M0 rectangular section
M1 Rough section m Middle section f Final section
31 Heating furnace
32 Double breakdown rolling mill
33 Double first intermediate rolling mill
34 Double second intermediate rolling mill
35 Double finishing mill
36a, 36b Upper roll
37a, 37b Lower roll
38 Outer side of intermediate section m
39 Joint forming load direction

Claims (6)

Comprising a claw root portion connected to the claw portion and having one of the claws only to the tip, the joint fitting of the steel sheet pile having left and right Raruzen type joint substantially symmetrical shape when the same claw root portion height a structure, the claw base portion height of one of the joints in the joint to be fitted with each other, rather higher than the claw base portion height of the other joint, and the claw base portion height of the one joint of the joint fitting An injection tube is inserted between the joint bottom of one joint and the claw of the other joint in a state where the claw of the one joint is in contact with the joint bottom of the other joint. A steel sheet pile joint fitting structure, characterized in that a gap is formed .   2. The steel sheet pile joint fitting structure according to claim 1, wherein the height of the claw root of the one joint is 10 mm or more higher than the height of the claw root of the other joint.   The gap formed between the outer surface of the claw part of the one joint and the inner surface of the joint part of the other joint can be installed with a circular member having a diameter of 10 mm or more due to the difference in the height of the base part of the claw. The steel sheet pile joint fitting structure according to claim 1 or 2, characterized in that:   It is a steel sheet pile wall which has the joint fitting structure of the steel sheet pile of any one of Claims 1-3, Comprising: In each steel sheet pile which comprises a steel sheet pile wall, the claw root part height of the joint of one side However, the steel sheet pile wall is characterized by being higher than the claw root height of the joint on the other side.   It is a steel sheet pile wall which has the joint fitting structure of the steel sheet pile of any one of Claims 1-3, Comprising: A steel sheet pile wall arrange | positions a 1st steel sheet pile and a 2nd steel sheet pile alternately. A steel sheet pile wall characterized in that the joints on both sides of the first steel sheet pile have a claw root height higher than the joints on both sides of the second steel sheet pile.   It is a steel sheet pile wall of Claim 4 or 5, Comprising: The space | gap formed between the nail | claw part outer surface of said one joint, and the joint part inner surface of said other joint by the difference in the said nail | claw root part height. A steel sheet pile wall characterized by being filled with a water stop material.

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