JP2000192452A - Steel sheet pile for water cut-off, joint structure therefor, and steel sheet pile wall for water cut-off - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint structure for a steel sheet pile, which is simple in construction and is capable of surely securing a void for installing a water cut-off material. SOLUTION: There is provided a steel sheet pile having male and female joints 16 which are pairing up and engaged with each other. The height of a claw of one of the joints 16 is set higher than the height of a claw of the other joint, and an opening 22 of the joint is set so as to have a joint opening width W which can ensure a hook 23 of the claw 17. Each of the male and female joints is formed such that a claw base plate thickness T1 and a maximum thickness T in a direction of a claw maximum plate thickness are the same or almost the same in size, or alternatively not the same. Further, the cross section of the entire male joint is nonidencial with that of the entire female joint.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel sheet pile for waterproofing, which is used for construction of a water-stop wall which requires water-stop, such as an outer seawall or a middle seawall of a waste disposal site, or a water barrier of a dike. The present invention relates to a joint structure and a steel sheet pile wall for waterproofing.

[0002]

2. Description of the Related Art As prior art related to this type of steel sheet pile for waterproofing, (A) Jiko 46-33977 (steel sheet with swelling paint for watertight joining), (B) Jiko 7-6179 (steel sheet pile) ), (C) JP-B-47-43612 (swellable paint composition), and (D) JP-B-6-96688 (water-swellable paint composition).

[0003] The outline of the method of constructing a water blocking wall using a steel sheet pile according to the prior art (A) is as follows. As shown in FIGS. 15 and 16, the water-absorbing and swellable water-stopping material 4 is “poured” or “applied” to the fitting inner contact portion 3 of the joint 2 of the steel sheet pile 1 using a jig such as a brush. In the case of the solid water-absorbing and swelling water-stopping material 4, it is attached to the fitting inscribed surface of the steel sheet pile with an adhesive or the like. The water-absorbing and swellable water-stopping material 4 is dried. In the case of a solid water-absorbing and swelling water-stopping material, there is no need to dry it. Joint 2 of steel sheet pile 1 on which water-absorbing and swelling waterproof material 4 is installed
The steel sheet pile 1 is driven into the ground or the like by fitting each other. The water-absorbing and swellable water-stopping material 4 absorbs water in the water (including the sea) and in the soil and swells, thereby forming the fitted joint 2.
To prevent water leakage from the joint fitting portion of the steel sheet pile 1.

According to the prior art, when the steel sheet pile 1 is driven into the soil or the like, the joints 2 of the steel sheet pile 1 come into contact with each other, so that the water-absorbing and swelling water-stopping material 4 is peeled off, and sufficient stoppage is achieved. In some cases, water performance could not be exhibited.

[0005] As a countermeasure, a method of using a large amount of a water-absorbing and swelling water-stopping material has been adopted, but has the following problems. Since a large amount of the water-absorbing and swelling water-stopping material is used, the cost is high and uneconomical. Even if a large amount of the water-absorbing and swelling water-stopping material is used, it is difficult to completely prevent the water-absorbing and swelling water-stopping material from peeling off, and the water-stopping property may be incomplete. For the reasons described above, there has been a demand for a technique that does not cause the water-absorbing and swelling water-stopping material to peel off when the steel sheet pile is driven into the soil or the like, and requires a small amount of the water-absorbing and water-stopping material.

In Japanese Utility Model Publication No. 7-6179 of the prior art (B), a concave groove is formed in the fitting inscribed portion in the axial longitudinal direction, and the concave groove is filled with a water-expandable sealing material. The disadvantage that the water-absorbing and swellable water-stopping material is peeled off during installation is improved. However, in this technique, forming a concave groove in the fitting inscribed portion of the steel sheet pile joint involves a large technical increase in cost, and in the cross section of the concave groove, the area where the joints of the steel sheet pile do not come into contact with each other. May not be sufficiently secured, and if the cross section of the concave groove is increased so as to secure a sufficient area not to contact, the joint detachment strength may decrease.

[0007]

The means for improving the water stopping performance of a conventional steel sheet pile joint is roughly divided into a fitting fitting in which a water-absorbing and swelling water-stopping material is attached to a fitting inner surface of a fitting having the same cross-sectional shape of male and female. In this case, a water-stopping material-filled recess is formed on the joint inscribed surface. However, there is a drawback that water stoppage may be incomplete in some cases, and further, there is a problem in terms of strength, processing cost, and the like. Further, even if the water-stopping material is improved, it does not lead to the completeness of the water stoppage unless the above-mentioned is solved.

As a result of various studies on the above problems, the present inventor has changed the technical point of view and has made a new concept of unconventional idea of making the male and female sides of a steel sheet pile joint non-identical in cross section. It was originally devised, and when the male and female joints are fitted to each other, a part where both the joints do not necessarily come into contact can be formed, thereby achieving the intended purpose.

[0009]

To achieve the above object, the present invention is configured as follows. The steel sheet pile for water stoppage according to the first aspect of the present invention provides a male and female joint which is fitted in a pair with each other, and has a claw height (H) of one joint lower than a height of the other claw. The opening is provided in the joint opening width (W) enough to secure hooking of the claw, and the maximum thickness in the direction of the claw root thickness (T ₁ ) and the maximum thickness of the claw is ensured so as to secure the joint fitting strength. The thickness (T) is the same or substantially the same as that of the male and female joints, and the male and female joints have a non-identical cross-sectional shape. According to a second aspect of the present invention, in the steel sheet pile, the claw height (H) of one of the male and female joints fitted in a pair with each other and the maximum thickness (T) in the claw maximum plate thickness direction. ), One or more of the joint height (H ₁ ) is smaller than the other, the joint opening is provided in the joint opening width (W) enough to secure the hook of the claw, and the thickness of the base of the claw is provided. (T ₁ ) is characterized in that the male and female joints have the same or substantially the same dimensions, and that the entire joint has a non-identical cross section. The steel sheet pile for water stoppage of the invention according to claim 3 is the one of female and male joints of the non-identical cross-sectional shape of the non-identical cross-section fitting and mating with each other. It is characterized in that it is provided on the side flange and the other joint is provided on the other side flange. The steel sheet pile for waterproofing of the invention of claim 4 is:
3. The male or female joint according to claim 1 or 2, wherein the male and female joints having a non-identical cross-sectional shape fitted in a pair with each other have a lower claw height (H) or a smaller thickness in a maximum thickness direction. Are provided on both side flanges. Claim 5
The invention of claim 3 is characterized in that, in the steel sheet pile for water stop according to the third aspect, the joints of non-identical cross sections of the male and female are fitted to each other to constitute the wall of the steel sheet pile for water stop. According to a sixth aspect of the present invention, in the steel sheet pile for waterproofing according to the fourth aspect, a female and male non-identical joints are fitted to each other to construct a steel sheet pile wall for waterproofing.

[0010] According to the present invention, by providing the male and female joints of the water-stopping steel sheet pile that are fitted to each other in a non-identical cross-sectional shape, the joints are usually compressed, tensioned, and rotated at the joint fitting portions. Regardless of the fitting state, a non-contact surface and a void are inevitably formed due to the dimensional difference between the male and female joints, and the non-contact surface is applied, mounted, and filled in this portion by the water-stop material. Does not peel off during casting.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below together with comparative examples with reference to the drawings. First, FIGS.
4 shows a comparative example. The joint 6 shown in this comparative example has the same cross-sectional shape as that of the male and female, and is formed by bending the tip of the flange portion 7 outward by hot rolling or cold forming. In FIG. 9, the hatched portion 8 of the joint 6 is a hatched portion,
The base end is a nail base 10, and a portion between the claw tip 11 and the outer surface of the fitting groove side surface 12 facing the claw tip 11 is a joint opening 14 in the fitting groove 13.

The joint 6 composed of the above components is shown in FIGS.
As shown in FIG. 14, a pair of joints 6 having the same female and male cross sections are formed, and the steel sheet piles are connected to each other by fitting and press-fitting each other. 11 shows a normal fitting state of the male and female joint 6, FIG. 12 shows a compression fitting state of the coupling 6, FIG. 13 shows a tension fitting state, and FIG. 14 shows a rotational fitting state.

In the joint 6 having the same cross section as shown in FIGS. 11 to 14, the shapes of the claw portion 8 and the fitting groove 13 are substantially similar to each other. The gap is inevitably smaller in any of the above-mentioned fitting states.

Accordingly, in the joint 6 having the same cross section as shown in FIGS. 11 to 14, the small gaps 15 and 15a on the inner surface of the joint are provided.
Even when a water-stopping material is applied, peeling occurs at the time of driving a sheet pile, similarly to the example described in the prior art (A). Further, when the small gaps 15 and 15a are filled with the water stopping material, smooth filling of the water stopping material and filling of a proper amount of the water stopping material cannot be expected because of the small gap.

The present invention is configured as follows. Before describing each embodiment, the configuration of each part of the joint 16 will be defined as follows. In FIG. 1 and FIG. 2, when viewed in the claw maximum thickness direction (indicated by an arrow (a)), the plate thickness between the inner surface and the top of the claw 17 bulging in an arc shape is defined as the claw maximum plate. The maximum thickness of the nail portion in the thickness direction (T), the width of the nail root portion 18 at a portion extending along the groove bottom extension direction (indicated by an arrow (b)) is defined as the nail root (minimum) thickness (T ₁ ), Claw height (H) between the tip 19 and the extension line of the claw tip (indicated by an arrow (C))
The joint section height (H ₁ ) between the joint back surface 9 and the claw tip 19 is a joint opening in the fitting groove 21 between the claw tip 19 and the fitting groove side face 20 opposed thereto. 22
Is defined as a joint opening width (W), the inner surface of the claw portion 17 is defined as a hooking surface 23a, and a portion where the hooking surfaces 23a of the both claw portions 17 are engaged with each other is defined as a hooking portion 23.

Hereinafter, Embodiments 1 to 6 will be described in order with reference to FIGS. FIG. 3 shows a first embodiment corresponding to the first aspect of the present invention. 4 to 7 show a second embodiment corresponding to the second aspect of the present invention. FIGS. 8A and 8B show Embodiments 3 and 4 corresponding to the third, fifth and third and sixth aspects of the present invention. FIGS. 9A and 9B show Embodiments 5 and 6 corresponding to the inventions of Claims 4, 5 and 4, 6, respectively. In each embodiment, the male and female joints that fit with each other are configured to have non-identical cross-sectional shapes.

In the first embodiment shown in FIG. 3, of the male and female joints fitted to each other, the portion indicated by a dotted line (d) at the tip of the claw 17 of one joint 16 is the claw 17 of the other joint 16.
Is a dimensional difference portion 24 with respect to the tip end. That is, the claw height (H) of one joint described with reference to FIG. 1 is provided lower than the height of the other claw. This dimensional difference is provided by hot rolling, cutting, or the like. The joint opening 22 is provided with a joint opening width (W) sufficient to secure the hook portion 23 of the claw portion 17, and has a claw base plate thickness (T ₁ ) and a maximum plate thickness in the claw portion maximum plate thickness direction. (T) has the same or substantially the same dimensions as the male and female joints, and the male and female joints have non-uniform cross-sectional shapes as a whole.

Therefore, in the first embodiment shown in FIG. 3, the dimension difference portion 24 allows the joint 16 on the male and female sides to
Usually, a non-contact surface or a gap corresponding to the dimension difference portion 24 is necessarily formed regardless of whether the two joints 16 are in the fitting state of compression, tension, or rotation. The waterproofing material attached by the above-mentioned method is not peeled off at the time of driving the steel sheet pile, and the intended purpose of smooth filling of the waterproofing material and filling of an appropriate amount can be achieved.

In the second embodiment shown in FIGS.
Of the male and female joints, the tip of the claw 17 of one of the joints 16
The end is indicated by an arc-shaped dotted line (e), and the other joint 16
Is formed as a dimensional difference portion 24a with the claw portion 17 of FIG. So this
In the example, the claw height (H) of one joint shown in FIG.
In addition to the configuration provided below the claw height, the claw height
(H) is reduced, the maximum thickness (T) of one joint is
Maximum thickness of joint (T _Two) And the non-contact surface
More examples are shown.

Also in the second embodiment, the dimension difference portion 2
4a, inside the fitting of the male / female side joint 16, the two joints 16 are normally provided in each of FIGS.
A non-contact surface or a void corresponding to the dimension difference portion 24a is inevitably formed in any of the compression, tension, and rotation fitting states. The waterproof material attached to the gap 25a by application, adhesion, filling or the like is not peeled off when the steel sheet pile is driven, and the intended purpose of smooth filling of the waterproof material and filling of an appropriate amount is achieved. it can.

FIG. 8 (A) shows a third embodiment of the present invention corresponding to the third and fifth aspects of the present invention. 16 is provided on one side of both flange portions 27 of the steel sheet pile 26, and the joint 16 having the dimensional difference portion 24 is provided on the opposite flange portion 27 between the preceding steel sheet pile 26a and the following steel sheet pile 26b. It is shown.

FIG. 8 (B) shows a fourth embodiment of the present invention corresponding to the third and sixth aspects of the present invention. An example in which 16 is provided on both flange portions 27 of the steel sheet pile 26 is shown.

FIG. 9A shows a fifth embodiment of the present invention corresponding to the fourth and fifth aspects of the present invention. 16 is provided on one side of both flange portions 27 of the steel sheet pile 26, and the joint 16 having the dimensional difference portion 24a is provided on the opposite flange portion 27 between the preceding steel sheet pile 26a and the following steel sheet pile 26b. It is shown.

In a sixth embodiment corresponding to the fourth and sixth aspects of the present invention shown in FIG. 9 (B), the joint 16 of the male and female non-identical cross-sectional shape shown in the second embodiment has a dimension difference portion 24a. An example in which the joint 16 is provided on both flange portions 27 of the steel sheet pile 26 is shown.

In each of the third to sixth embodiments, the dimensional difference portions 24 and 24a allow the dimensional difference portion 24 to fit inside the fitting of the male and female joints 16 irrespective of which fitting state the two joints 16 are in. , 24a are inevitably formed, and it is possible to reliably prevent the waterproofing material applied, mounted and filled in this portion from peeling off, and to construct a steel sheet pile wall having high waterproofness. The height of one joint (H ₁ ) is set to be smaller than the height of the other joint to form a gap between the two joints, or the dimensional difference between the joint height (H ₁ ) and the joint A gap may be formed between both joints in combination with any one of the dimensional difference of the claw portion height (H) and the dimensional difference of the maximum plate thickness (T) in the claw portion maximum plate thickness direction, or both. However, these are not shown.

[0026]

As described above, according to the present invention,
By providing the male and female joints of the water-stopping steel sheet pile that are fitted to each other with non-identical cross-sectional shapes, a dimensional difference is formed between the two joints. Even in the fitted state, a non-contact part or a void is inevitably formed in the joint fitting part due to the dimensional difference, and the water-stopping material attached to the non-contact part by coating, bonding or filling is steel. There is an effect that a smooth water-stopping material and a proper amount of the water-sealing material can be smoothly filled and an appropriate amount can be filled without being peeled when the sheet pile is driven, and a highly water-resistant steel sheet pile and a steel sheet pile wall can be realized.

[Brief description of the drawings]

FIG. 1 is an end view of a normal steel sheet pile joint shown for explaining a configuration of each part.

FIG. 2 is an explanatory view showing a fitting state of the joint of FIG. 1;

FIG. 3 is an explanatory diagram illustrating a fitting state of the joint according to the first embodiment.

FIG. 4 is an explanatory diagram showing a fitting state of the joint according to the second embodiment.

FIG. 5 is an explanatory view showing a compression fitting state of the joint according to the second embodiment.

FIG. 6 is an explanatory view showing a state in which the joint according to the second embodiment is in a tension-fit state.

FIG. 7 is an explanatory view showing a rotational fitting state of the joint according to the second embodiment.

FIGS. 8A and 8B are explanatory views showing a fitting state of a steel sheet pile having the joint of Embodiment 1 on one side or both sides of a flange as Embodiments 3 and 4, respectively.

FIGS. 9A and 9B are explanatory views showing a fitting state of a steel sheet pile having a joint of Embodiment 2 on one side or both sides of a flange as Embodiments 5 and 6, respectively.

FIG. 10 is an end view of a normal steel sheet pile joint shown as a comparative example.

FIG. 11 is an explanatory view showing a normal fitting state of the joint of FIG. 10;

FIG. 12 is an explanatory view showing a compression fitting state of the joint of FIG. 10;

FIG. 13 is an explanatory view showing a state in which the joint of FIG. 10 is pulled and fitted.

FIG. 14 is an explanatory view showing a rotationally fitted state of the joint of FIG. 10;

FIG. 15 is an end view of a conventional steel sheet pile for water stoppage.

FIG. 16 is a detailed view of the joint shown in FIG. 15;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Steel sheet pile 2 Joint 3 Fitting inscribed part 4 Water-absorbing and swellable water-stopping material 5 Waterproof steel sheet pile 6 Joint 7 Flange part 8 Nail part 9 Nail back surface 10 Nail base part 11 Nail tip part 12 Fitting groove side face 13 Fitting Groove 14 Joint opening 15 Small gap 16 Joint 17 Claw 18 Nail base 19 Claw tip 20 Fitting groove side surface 21 Fitting groove 22 Joint opening 23 Hooking portion 23a Hooking surface 24 Dimensional difference portion 25 Gap 26 Steel Sheet pile 27 flange

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Koichi Sato 2-6-3 Otemachi, Chiyoda-ku, Tokyo New Nippon Steel Corporation F-term (reference) 2D049 EA01 FB03 FB12 FC03 FD04

Claims (6)

[Claims] In a steel sheet pile, of male and female joints which are fitted together in pairs, one joint has a claw height (H) lower than the other claw height, and the joint opening is formed with a claw. Provide a joint opening width (W) that can secure hooking of the joint, and make the thickness of the nail base (T ₁ ) and the maximum thickness (T) in the direction of the maximum thickness of the claws the same or approximately the same as the male and female joints. And a joint structure of a steel sheet pile for waterproofing, characterized in that the joint has a non-uniform cross-sectional shape as a whole. 2. In a steel sheet pile, a claw height (H) of one of male and female joints fitted together in a pair,
At least one of the maximum plate thickness (T) and the joint height (H ₁ ) in the maximum plate thickness direction of the claw portion is provided smaller than the other, and the joint opening portion is provided with a joint opening that can secure hooking of the claw portion. A joint structure for a steel sheet pile for waterproofing, characterized in that it has a width (W), the thickness of the base of the nail (T ₁ ) is the same or substantially the same as that of the male and female joints, and the entire joint has a non-equal cross-sectional shape. . 3. A female or male joint according to claim 1, wherein said female or male joint has a non-identical cross-sectional shape and is fitted in a pair with each other. A water-cut steel sheet pile having a flange on the other side. 4. The female or male joint according to claim 1 or 2, wherein the male and female joints of which the claw height (H) is reduced among the male and female joints having a non-identical cross-sectional shape that are fitted in a pair with each other. Steel sheet pile for water stoppage provided on the flange. 5. A water-stopping steel sheet pile wall formed by fitting joints of non-identical cross sections of the water-stopping steel sheet pile of claim 3 to each other. 6. A steel sheet pile wall for waterproofing, which is formed by fitting joints of male and female non-identical cross sections in the steel sheet pile for waterproofing of claim 4 to each other.