JP6997472B2 - Fitting device - Google Patents

Description

INDUSTRIAL APPLICABILITY The present invention is used when connecting steel structural members constituting a wall body used as a water area structure (bank protection, quay, breakwater, diversion embankment, etc.) or land area structure (retaining wall, earth retaining wall, etc.). The present invention relates to a joint device, a steel structural member having a joint device, and a method of manufacturing and using the joint device. Steel structural members in the present invention include steel sheet piles such as hat-shaped steel sheet piles, steel pipe sheet piles, steel pipe piles, and other steel members.

In the use of steel sheet piles and the like, a joint device is used when connecting a changed part of a normal line, a branching point of a normal line, a steel sheet pile of a different model, or the like. The joint device is generally formed by installing a cylindrical joint with a slit (for example, a steel pipe with a slit) on a steel sheet pile or the like. Then, a steel sheet pile or the like is connected by inserting a male joint (for example, a joint portion of a steel sheet pile) into the slit of a tubular joint having a slit, which is a female joint.

Conventionally, a cylindrical joint with a slit has been directly fixed to a steel sheet pile or the like by welding or the like (see, for example, Patent Document 1).

Japanese Patent No. 6596174

However, especially when a tubular joint made of a steel pipe is directly fixed to a steel sheet pile or the like by welding or the like, the welding work space (the space formed by the outer surface of the steel pipe at the welding target site and the outer surface of the steel sheet pile or the like) is narrow. Therefore, there is a problem that the welding efficiency is poor and it is difficult to carry out the welding inspection. In addition, the method of directly fixing a tubular joint made of steel pipe to a steel sheet pile or the like by welding or the like has a problem that the structural stability of the tubular joint is low when it is subjected to the action of a lateral load because the distance between fixings is small. be. This corresponds to a structure in which the spacing between columns is narrow, as compared to a structure in which the spacing between columns is wide, in the case of a rigid frame structure having two columns, which is less structurally stable to a lateral load.

The present invention has been developed in view of such a situation, and is a joint device having a sufficient welding work space and good structural stability, and a steel structural member having a joint device. , And how to make and use the fitting device.

The joint device used for connecting the steel structural members constituting the wall body used as the water area structure or the land area structure according to claim 1 of the present application has an outer diameter D (30 mm ≦ D ≦ 250 mm). A joint member formed of a circular steel pipe and a pair of fixing members arranged at predetermined portions of the joint member at a predetermined distance in the cross-sectional direction are provided, and the joint member includes the joint member at a predetermined portion in the cross-sectional direction. A fitting slit consisting of an opening having a constant width extending in the longitudinal direction of the joint member is provided, and the longitudinal direction of the pair of fixing members is continuous or intermittent welding in the longitudinal direction of the predetermined portion of the joint member, respectively. The joint member is fixed by continuous or intermittent welding in the longitudinal direction of a predetermined portion of the steel structural member, so that the joint member is fixed with the steel structural member. It is characterized in that it is configured to be fixed to .

The joint device used for connecting the steel structural members constituting the wall body used as the water area structure or the land area structure according to claim 2 of the present application has an outer diameter D (30 mm ≦ D ≦ 250 mm). A joint member formed of a circular steel pipe and a pair of fixing members arranged at predetermined portions of the joint member at a predetermined distance in the cross-sectional direction are provided, and the joint member is provided with a predetermined portion in the cross-sectional direction in the longitudinal direction. A fitting slit formed by at least one cutting portion consisting of a pair of extending parallel cutting lines is provided, and the longitudinal direction of the pair of fixing members is the longitudinal direction of the predetermined portion of the joint member. The pair of fixing members are fixed by continuous or intermittent welding, respectively, and the pair of fixing members are fixed by continuous or intermittent welding in the longitudinal direction of a predetermined portion of the steel structural member. It is characterized in that the joint member is configured to be fixed to the steel structural member.

According to the present invention, since the joint member 34 is configured to be attached to the steel structural member 32 via the pair of fixing members 38, it is possible to secure a welding work space for the joint member 34 and facilitate welding work. Not only can it be done, but it can also contribute to maintaining good welding quality. Further, since the pair of fixing members 38 separated by a predetermined distance are used, the structural stability of the joint member 34 is excellent. Furthermore, since the mounting location and dimensions (steel rod size, flat steel size, angle-shaped steel size) of the fixing member 38 can be adjusted, the degree of freedom in plane allocation (arrangement) of the steel structural member 32 can be improved. At the same time, it is possible to easily absorb the construction error of the steel structural member 32.

FIG. 3 is a plan view showing a part of a wall body formed of a steel structural member having a joint device according to a preferred embodiment of the present invention. 2A is an enlarged view of a portion 2a of FIG. 1, and FIG. 2B is an enlarged view of a portion 2b of FIG. 2A. FIG. 3 (a) is a diagram showing a state in which a joint member is attached to the outer surface near the connection point between the flange of the hat-shaped steel sheet pile (steel structural member) and the web, and FIG. 3 (b) is a diagram. It is an enlarged view of the part 3b of 3 (a). It is a series of figures showing the state that the joint member is provided in various places of a hat-shaped steel sheet pile. 5 (a) is a diagram showing a usage example in which a joint member to which a fixing member is attached is fixed to a steel structural member, and FIGS. 5 (b) to 5 (d) show various aspects of the joint device. It is an exemplary figure. It is a figure which showed the modification of the fitting slit. FIG. 7 (a) is a diagram similar to FIG. 3 (a) showing a form in which a pair of flat steels are used as the pair of fixing members, and FIG. 7 (b) is an enlargement of the portion 7 b of FIG. 7 (a). It is a figure. It is a series of figures showing a state in which a joint member is provided in various places of a hat-shaped steel sheet pile by using a pair of flat steels as a pair of fixing members. 9 (a) is a diagram similar to FIG. 3 (a) showing a form in which a pair of angle-shaped steels are used as a pair of fixing members, and FIG. 9 (b) is a portion 9b of FIG. 9 (a). It is an enlarged view. It is a series of figures showing a state in which a joint member is provided in various places of a hat-shaped steel sheet pile by using a pair of angle-shaped steels as a pair of fixing members. 11 (a) is a schematic view showing a steel structural member installed at the boundary between the sea and land, and FIGS. 11 (b) and 11 (c) are lines 11b-11b of FIG. 11 (a). , 11c-11c, respectively. It is a figure which showed the example which different kinds of steel materials are used as a pair of fixing members. FIG. 13 (a) is a view showing a case where a pair of flat steels are used as a fixing member and a steel structural member made of a steel pipe pile and a joint steel pipe are welded and fixed to form a steel pipe sheet pile wall, FIG. 13 (b) . ) Is an enlarged view of the portion 13b of FIG. 13 (a) , and FIG. 13 (c) is an enlarged view of the portion 13c of FIG. 13 (b) . 14 (a) shows an example in which the filler is filled inside the joint member, and FIGS. 14 (b) to 14 (e) show the filler provided with a cut or an opening having a predetermined shape. It is a series of figures illustrating the example.

Next, a joint device according to a preferred embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view showing a part of a wall body formed of a steel structural member having a joint device according to a preferred embodiment of the present invention, and FIG. 2A is an enlarged view of a portion 2a of FIG. Is.

The wall body 10 shown in FIG. 1 has a box body 20 formed by assembling a pair of front wall 12, a rear wall 14, and a pair of partition walls 16 and 18 into a rectangular shape when viewed in a plane. The pair of front walls 12, the rear walls 14, and the pair of partition walls 16 and 18 are configured by connecting wall members made of steel structural members (for example, hat-shaped steel sheet piles) via fitting joints. .. Further, the internal space 22 in the box 20 is filled with a filling material (not shown).

A steel structural member having a joint device 30 is installed at a joint portion between the front wall 12, the rear wall 14, and the ends of the partition walls 16 and 18.

The joint device according to a preferred embodiment of the present invention, which is indicated by reference numeral 30 as a whole in FIG. 2A, extends in the longitudinal direction on the outer surface near the connection point between the flange 32a and the web 32d of the steel structural member 32. It is provided with a joint member 34 attached via a pair of fixing members 38.

The joint member 34 is formed of a circular steel pipe (30 mm ≦ D ≦ 250 mm) having an outer diameter D, and the joint member 34 is provided with a fitting slit 36 extending in the longitudinal direction at a predetermined portion in the cross-sectional direction. There is. In the example shown in FIG. 2A, the fitting slit 36 is provided right beside the right side of the joint member 34, but the position of the fitting slit 36 is changed as necessary. Although an example is shown in which a joint portion of a hat-shaped steel sheet pile serving as a male side member is fitted into the fitting slit 36, a steel plate may be used as the male side member to be fitted.

The pair of fixing members 38 are formed of a pair of steel rods having a circular cross section. That is, as shown in FIG. 3B, the pair of steel rods are fixed to the outer surface of the joint member 34 at a predetermined position with a predetermined separation distance x1 by welding 38a, and the steel structural member 32 The joint member 34 is attached to the steel structural member 32 by fixing the joint member 34 to a predetermined position by welding (in other words, the joint member 34 is not directly fixed to the steel structural member 32). The welding 38a may be continuous welding or discontinuous welding.

The attachment position of the pair of steel rods to be the fixing member 38 is the separation distance x1 between the contact points 38b between the steel rods and the circular steel pipe 34, or the angle formed by the center of the circular steel pipe 34 and the contact points 38b of each steel pipe. It is defined by α1 (see FIG. 3 (b)). That is, if the separation distance x1 or the angle α1 is too small, it becomes difficult to obtain good structural stability of the joint member 34. Therefore, a pair of steel rods are placed at positions satisfying either the distance x1 ≧ 60 mm or the angle α1 ≧ 30 °. It is preferable to attach it.

By attaching the joint member 34 to the steel structural member 32 via the pair of fixing members 38, the following effects can be obtained. First, since the welding work space of the joint member 34 can be secured, the welding work can be easily performed (the welding work is performed from the direction indicated by the arrow in FIG. 3B), and good welding quality is maintained. Can also contribute to. Secondly, since the pair of fixing members 38 separated by a predetermined distance are used, the structural stability of the joint member 34 is excellent. Thirdly, since the mounting location and dimensions (steel rod size, flat steel size, angle-shaped steel size) of the fixing member 38 can be adjusted, the degree of freedom in plane allocation (arrangement) of the steel structural member 32 is improved. At the same time, it is possible to easily absorb the construction error of the steel structural member 32.

It should be noted that the attachment of the joint member 34 to the steel structural member 32 does not necessarily have to be performed before the construction of the steel structural member 32 having a general shape in which the joint member 34 is not installed. Depending on the construction status of the steel structural member 32 having a general shape in which the joint member 34 that has been previously constructed is not installed, it may be easier to construct the steel structural member 32 that is to be constructed later if the joint member 34 is not previously attached. be. That is, the joint member 34 is not attached to the steel structural member 32, and the joint member 34 is attached to the steel structural member 32 at an appropriate time in the construction progress in consideration of the existing construction error situation and the like. It may be installed in an appropriate place (see FIG. 5 (a)). By doing so, flexible construction becomes possible.

In the examples shown in FIGS. 1 and 2, a hat-shaped steel sheet pile is used as the steel structural member 32.

As shown in FIG. 3A, the hat-shaped steel sheet pile 32 mainly has a flange 32a, an arm portion 32b, and a joint portion 32c that resist bending moments when a load such as earth water pressure is applied, and mainly a shear force. It has a web 32d to resist. More specifically, in the hat-shaped steel sheet pile 32, a pair of webs 32d are continuously arranged so as to extend outward from both edges of the flange 32a, and each web 32d is substantially parallel to the flange 32a. The arm portions 32b are continuously arranged so as to be continuous, and the joint portion 32c is continuously provided on each arm portion 32b.

An upper opening claw 32c1 is formed on one of the joint portions 32c of the hat-shaped steel sheet pile 32, and a lower opening claw 32c2 is formed on the other side of the joint portion 32c. The upper opening claw 32c1 and the lower opening claw 32c2 are shaped to complement each other, and the joint of the other hat-shaped steel sheet pile 32 adjacent to the upper opening claw 32c1 of the joint portion 32c of the one hat-shaped steel sheet pile 32. By fitting the lower opening claw 32c2 of the portion 32c, or by fitting the lower opening claw 32c2 of the joint portion 32c of one hat-shaped steel sheet pile 32, the upper opening claw of the joint portion 32c of the other hat-shaped steel sheet pile 32 adjacent to the lower opening claw 32c2. By fitting 32c1, a desired number of hat-shaped steel sheet piles 32 can be fitted.

In the example shown in FIGS. 2 and 3, the joint member 34 is attached to the outer surface (mountain side) near the connection point between the flange 32a and the web 32d of the steel structural member 32, but if necessary, the joint member 34 is attached to the joint. The member 34 may be fixed to a desired location on the steel structural member 32. For example, the joint member 34 may be attached to the outer surface (mountain side) of the flange 32a (see FIG. 4A), or may be attached to the outer surface (mountain side) of the web 32d (see FIG. 4B). It may be attached to the inner surface (valley side) of the arm portion 32b (see FIG. 4 (c)), or may be attached to the inner surface (valley side) near the connection point between the flange 32a and the web 32d (FIG. 4 (d). )reference).

There are various methods for installing the joint member 34 on the steel structural member 32. Typical installation methods are listed below. In the first installation method, the joint member 34 is installed on the steel structural member 32 as planned and designed. In this case, the installation location is a factory, a yard near the site, or the like. The joint member 34 may have a length configuration as planned or designed, or a part having a length of several meters may be prepared and a plurality of these parts may be connected and installed. In the second installation method, the joint member 34 is attached to the steel structural member 32 at an appropriate time in the progress of construction in consideration of the construction error situation of the existing construction. In this case as well, the installation location is a factory, a yard near the site, or the like. The joint member 34 may have a length configuration as planned or designed, or a part having a length of several meters may be prepared and a plurality of these parts may be connected and installed.

When arranging a plurality of parts with a length of several meters to a predetermined length, the joint members 34 are arranged in close contact (metal touch) within the range where it is necessary to prevent sediment leakage from the back surface, and if necessary. Then, the joints between the parts are welded directly or via a splicing plate. Parts may be arranged in a discontinuous (intermittent) state as long as it is not necessary to prevent sediment leakage from the back surface. 5 (b) to 5 (d) are views illustrating various aspects of the joint member 34. In the embodiment shown in FIG. 5B, the joint member 34 is formed of one part having a length L. Further, in the embodiment shown in FIG. 5C, the joint member 34 is formed of two parts having a length L1 and a length L2. In the embodiment shown in FIG. 5D, the joint device 30 is formed by arranging two parts having a length L3 and a length L4 in a discontinuous (intermittent) state. In the illustrated example, the number of parts is one or two, but the number of parts may be three or more. If the length of the parts is 12 m or less, it is convenient for transportation and handling.

FIG. 6 shows a modified example of the fitting slit 36. The fitting slit 36 shown in FIG. 6 is formed by at least one cut portion 36a and at least one non-cut portion 36b arranged alternately. That is, at least one cutting portion 36a composed of a pair of parallel cutting lines extending in the longitudinal direction is provided in advance at a predetermined portion of the joint member 34, and after fixing the joint member 34 to the steel structural member 32, the joint member 34 is fixed to the steel structural member 32. The fitting slit 36 is formed by cutting the non-cut portion 36b by a required method.

As a guide, the cut portion 36a is about 1000 to 2000 mm, and the non-cut portion 36b is about 5 to 50 mm. If the overall shape of the slit width after cutting is confirmed by an experiment or the like, the combination of the cut portion 36a and the non-cut portion 36b is arbitrary.

In the above embodiments, a pair of steel rods are used as the pair of fixing members 38, but a pair of flat steel or a pair of angle-shaped steels may be used as the pair of fixing members 38.

FIG. 7 shows a form in which a pair of flat steels are used as the pair of fixing members 38. In the embodiment shown in FIG. 7, the joint member 34 is fixed to the outer surface of the predetermined portion by welding 38a at a predetermined separation distance x2, and is fixed to the predetermined portion of the steel structural member 32 by welding 38a. The joint member 34 is attached to the steel structural member 32 (in other words, the joint member 34 is not directly fixed to the steel structural member 32). The welding 38a may be continuous welding or discontinuous welding.

The mounting position of the pair of flat steels to be the fixing members 38 is the separation distance x2 between the contact points 38b between the flat steel and the circular steel pipe 34, or the angle formed by the center of the circular steel pipe 34 and the contact points 38b of each flat steel pipe. It is defined by α2 (see FIG. 7 (b)). That is, if the distance x2 or the angle α2 is too small, it becomes difficult to obtain good structural stability of the joint member 34. Therefore, a pair of flat steels are attached at positions satisfying either the distance x2 ≧ 110 mm or the angle α2 ≧ 70 °. Is preferable.

FIG. 9 shows a form in which a pair of angle-shaped steels are used as the pair of fixing members 38. In the embodiment shown in FIG. 9A, the joint member 34 is fixed to the outer surface of a predetermined portion by welding 38a at a predetermined separation distance x3, and is fixed to the predetermined portion of the steel structural member 32 by welding 38a. Thereby, the joint member 34 is attached to the steel structural member 32 (in other words, the joint member 34 is not directly fixed to the steel structural member 32). The welding 38a may be continuous welding or discontinuous welding. In the form shown in FIG. 9A, the pair of angle-shaped steels are fixed to the steel structural member 32 in a state where the outer surfaces of each side of the pair of angle-shaped steels are in contact with the outer surface of the steel structural member 32. However, the tips of each side of the pair of angle-shaped steels may be fixed to the outer surface of the steel structural member 32, and the tips of the other sides of the pair of angle-shaped steels may be fixed to the joint member 34. .. Further, in a state where the outer surface of one side of one angle-shaped steel of the pair of angle-shaped steels is in contact with the outer surface of the steel structural member 32, the pair of angle-shaped steels are fixed to the steel structural member 32. The tip of one side of the other angle-shaped steel may be fixed to the outer surface of the steel structural member 32, and the tip of the other side of the other angle-shaped steel may be fixed to the joint member 34.

The attachment position of the pair of angle-shaped steels to be the pair of fixing members 38 is the separation distance x3 between the contact points 38b between the angle-shaped steel and the circular steel pipe 34, or the contact points between the center of the circular steel pipe 34 and each angle-shaped steel. It is defined by the angle α3 formed with 38b (see FIG. 7B). That is, if the distance x3 or the angle α3 is too small, it becomes difficult to obtain good structural stability of the joint member 34. Therefore, a pair of angle-shaped steels are placed at positions satisfying either the distance x3 ≧ 110 mm or the angle α3 ≧ 70 °. It is preferable to attach it.

When a pair of flat steels or a pair of angle-shaped steels are used as the fixing member 38, the same effect as when a pair of steel rods are used as the fixing member 38 can be obtained.

FIG. 8 is a diagram showing a form in which the joint member 34 is fixed to another part of the steel structural member 32 in the form shown in FIG. 7. The pair of flat steels used as the fixing member 38 may be attached so as to be orthogonal to the outer surface of the steel structural member 32, and may be inclined at a required angle with respect to the outer surface of the steel structural member 32. It may be attached. FIG. 10 is a diagram showing a form in which the joint member 34 is fixed to another part of the steel structural member 32 in the form shown in FIG.

When the joint member 34 is attached to the steel structural member 32 via the fixing member 38, the welded portion of both or one of the joint member 34 and the fixing member 38, and both or both of the steel structural member 32 and the fixing member 38. It is preferable to install a surface-treated surface for welding at one of the welding points. The surface-treated surface for welding is a welded surface that does not adversely affect the welding quality, and impurities (rust, dirt, dust, paint, etc.) that adversely affect welding are removed from the surface-treated surface for welding. .. In order to obtain a welded surface that does not adversely affect the weld quality, the welded portion is surface-treated so as to have a glossy surface. Specifically, the surface-treated surface for welding is surface-treated by mechanical finishing using a tool such as a grinder, a disc sander, or a wire brush.

Even if the machine is finished, it will rust over time, so it is preferable to apply the groove rust preventive after the machine is finished with a grinder or the like. The groove rust preventive is preferably a non-transparent color (for example, silver). By using a non-transparent groove rust preventive, the welded part becomes clear at a glance, the welded part becomes clear, and the effect of facilitating the control of the welding quality by visual inspection or photography can be obtained. The groove rust preventive is an anticorrosive paint, but it is an anticorrosive paint that does not adversely affect the welding quality even if it is welded without removing the groove rust preventive.

Although an example in which a hat-shaped steel sheet pile is used as the steel structural member 32 has been described, the configuration of the joint device 30 is substantially the same even when another steel sheet pile such as the U-shaped steel sheet pile is used.

The joint member 34 to be a female joint may be provided over the entire length of the steel structural member 32, or may be shorter than the total length, and the earth and sand existing in a predetermined range (at least, the earth and sand existing on the back surface of the wall body causes earth and sand leakage). It may be provided over a range). FIG. 11 is a schematic view showing an example of installation of the female joint and the male joint on the steel structural member 32. In FIG. 11B, a female joint is installed in the upper half of one side of the steel structural member 32, a male joint is installed in the upper half of the other side of the steel structural member 32, and a male joint is installed in the lower half. A guide section is installed. FIG. 11 (c) is the same as the example of FIG. 11 (b) except that the guide portion is intermittently installed. The guide portion is useful for improving the workability of fitting the joint, particularly when the steel structural member is a steel pipe sheet pile as described later. The upper end of the steel structural member is usually buried in the upper concrete (see FIG. 11A).

In the above embodiments, a pair of steel rods, a pair of flat steels, and a pair of angle-shaped steels are used as the pair of fixing members 38, but different types of steel materials, that is, steel rods and flat steel, flat steel. And angle-shaped steel, or steel rods and angle-shaped steel may be used as the fixing member 38.

FIG. 12A shows an example in which a steel rod and flat steel are used as the pair of fixing members 38. The mounting position of the steel rod and the flat steel is the separation distance x7 between the contact point 38b between the steel rod and the circular steel pipe 34 and the contact point 38b between the flat steel and the circular steel pipe 34, or the center of the circular steel pipe 34 and the steel rod. It is defined by the angle α7 formed between the contact point 38b of the above and the contact point 38b of the flat steel. It is preferable to mount the steel rod and the flat steel at a position satisfying either the distance x7 ≧ 110 mm or the angle α7 ≧ 70 °. FIG. 12B shows an example in which flat steel and angle-shaped steel are used as the pair of fixing members 38. The mounting position of the flat steel and the angle steel pipe is the separation distance x8 between the contact point 38b between the flat steel and the circular steel pipe 34 and the contact point 38b between the angle steel pipe and the circular steel pipe 34, or the center of the circular steel pipe 34. It is defined by the angle α8 formed between the contact point 38b of the flat steel and the contact point 38b of the angle-shaped steel. It is preferable to mount the flat steel and the angle-shaped steel at a position satisfying either the distance x8 ≧ 110 mm or the angle α8 ≧ 70 °. FIG. 12C shows an example in which a steel rod and angle-shaped steel are used as the pair of fixing members 38. The mounting position of the steel rod and the angle steel pipe is the separation distance x9 between the contact point 38b between the steel rod and the circular steel pipe 34 and the contact point 38b between the angle steel rod and the circular steel pipe 34, or the center of the circular steel pipe 34. It is defined by the angle α9 formed by the contact point 38b of the steel rod and the contact point 38b of the angle-shaped steel. It is preferable to mount the flat steel and the angle-shaped steel at a position satisfying either the distance x9 ≧ 110 mm or the angle α9 ≧ 70 °.

Further, as the steel structural member 32, instead of the steel sheet pile, a joint device may be applied to the steel pipe pile to form the steel pipe sheet pile wall. FIG. 13A shows a case where a pair of flat steels are used as the fixing member 38 and a steel structural member 32 made of a steel pipe pile and a joint steel pipe 34 are welded and fixed to form a steel pipe sheet pile wall . 13 (b) is an enlarged view of the portion 13b of FIG. 13 (a) , and FIG. 13 (c) is an enlarged view of the portion 13c of FIG. 13 (b) .

The steel pipe sheet pile wall shown in FIG . 13 (a) is formed by fitting a plurality of steel pipe piles 32 (three are shown in FIG. 13 (a)) via a joint described later, and is formed with the sea. It is constructed between the land and the land (in FIG. 13 (a) , the right side is shown as the sea and the left side is shown as the land (earth and sand)).

The joint device for the steel pipe pile 32 includes a joint member 34 attached via a pair of fixing members 38 so as to extend in the longitudinal direction at a position facing the diameter direction of the steel pipe pile 32. The joint member 34 is formed of a circular steel pipe having an outer diameter D (30 mm ≦ D ≦ 250 mm) as in the above embodiment, and is fitted into the joint member 34 at a predetermined portion in the cross-sectional direction so as to extend in the longitudinal direction. A joint slit 36 is provided. Then, a desired number of steel pipe piles 32 are joined by fitting the fitting slit 36 of the joint member 34 of the adjacent steel pipe pile 32 into the fitting slit 36 of the joint member 34 of one steel pipe pile 32. The steel pipe sheet pile wall is formed.

As shown in FIG. 13 (b) , the pair of fixing members 38 are formed of a pair of flat steels, and are joined by a predetermined separation distance as in the embodiment shown in FIG. 7 (b). The joint member 34 is attached to the steel pipe pile 32 by fixing it to the outer surface of the predetermined portion of the member 34 by welding 38a and fixing it to the predetermined portion of the steel pipe pile 32 by welding 38a. The welding 38a may be continuous welding or discontinuous welding. The flat steel is preferably mounted at a position satisfying either the distance x13 ≧ 110 mm or the angle α13 ≧ 70 °, as in the embodiment shown in FIG. 7 (b) (see FIG. 13 (c) ).

As the pair of fixing members 38, a pair of steel rods or a pair of angle-shaped steels may be used. The steel rod is preferably mounted at a position satisfying either the distance x1 ≧ 60 mm or the angle α1 ≧ 30 °, as in the embodiment shown in FIG. 3 (b), but the distance x1 ≧ 80 mm or the angle. When mounted at a position satisfying any of α1 ≧ 45 °, welding workability is further improved. Further, the mounting position of the angle-shaped steel is preferably a position satisfying either a distance x3 ≧ 110 mm or an angle α3 ≧ 70 °, as in the embodiment shown in FIG. 9B.

In the examples shown in FIGS. 13 (a) to 13 (c) , joint members 34 formed of circular steel pipes are attached to locations facing each other in the diameter direction of the steel pipe piles 32, but one of them is As the joint member 34 of the above, a member formed of a T-shaped member may be used instead of a member formed of a circular steel pipe.

The fixing member 38 may be fixed in advance to a predetermined portion of the steel pipe pile 32, or may be fixed to a predetermined portion of the steel pipe pile 32 at the construction stage, as in the case of the steel structural member 32 of the steel sheet pile described above. You may do so.

Preferably, the inside of the joint member 34 is filled with the solid filler 40. Taking a joint member 34 using a pair of steel rods as the pair of fixing members 38 as an example, the filler 40 is filled inside the joint member 34 as shown in FIG. 14 (a) . As the filler 40, for example, a solid filler (foamed styrene, urethane foam, etc.) and a time-curable filler (bituminous material, urethane, rubber, soil cement, etc.) are used. By filling the inside of the joint member 34 with the filler 40, it is possible to more reliably and easily prevent sediment leakage and delay the progress of corrosion in the joint member 34. The filling timing of the filler 40 is appropriately determined according to the properties of the filler 40 and the construction environment of the steel structural member 32. That is, the filling timing of the filler 40 is, in the case of a solid filler, before the construction of the steel structural member 32 (inserted into the joint member 34 in a laid-down state), and the filling is curable over time. In the case of a material, after the construction of the steel structural member 32 (to utilize the own weight of the filler 40. Filling is performed by using the own weight of the material from the upper end of the joint member 34. In some cases, pumping is performed). Is.

When a solid filler (styrofoam, urethane foam, etc.) is used as the filler 40, a cut or a dividing line 40a may be provided at a predetermined portion of the filler 40 ( FIGS. 14 (b) to 14 (b)). See FIG. 14 (d) ). By providing the cut or dividing line 40a, when the male side member is inserted into the fitting slit 36, the male side member is inserted into the cut or dividing line 40a and the filler 40 is smoothly deformed to eliminate the gap. This makes it possible to prevent sediment leakage more reliably. The breaks or dividing lines 40a shown in FIGS. 14 (b) to 14 (d) are exemplary and are not limited thereto. The cut or dividing line 40a is determined in consideration of the shape of the fitting portion of the male side member. In the form shown in FIG. 14D , the filler 40 having a circular cross section is divided into four parts (therefore, the dividing line 40a enters the cross) and fixed with kraft tape (gum tape) or the like to form the joint member 34. It is to be inserted inside.

Further, an opening 40b having a predetermined shape (for example, a shape corresponding to the shape of the fitting portion of the male side member to be fitted) may be provided at a predetermined portion of the filler 40 (see FIG . 14E ). In addition, both a cut or a dividing line 40a and an opening 40b may be provided at a predetermined portion of the filler 40.

When manufacturing the joint device 30, the joint member 34 is left unattached to the steel structural member 32 according to the construction situation at the construction site or the manufacturing situation at the factory, and the joint member 34 is at an appropriate time of construction. May be attached to the steel structural member 32.

When the fitting slit 36 has the form shown in FIG. 6, the cutting time of the non-cutting portion 36b may be either before or after the attachment of the joint member 34 to the steel structural member 32. Further, when the solid filler 40 is filled inside the joint member 34, it is preferable to perform the filling after cutting the non-cut portion 36b. When the steel structural member 32 in which the solid filler 40 is filled inside the joint member 34 is penetrated into the ground, the solid filler 40 moves or rotates in the axial direction of the joint member 34. It is desirable to take measures to prevent it from slipping.

The wall body 10 is formed by fitting or arranging a large number of steel structural members 32 and burying the lower portion in the lower support. The lower support is a foundation ground or concrete footing or the like. The foundation ground also includes the ground formed by the improved soil. The wall body 10 is embedded in the foundation ground by vibration driving by a vibro hammer, impact driving by a hydraulic hammer, press fitting by a hydraulic press-fitting device, and the like.

The present invention is not limited to the embodiments of the above invention, and various modifications can be made within the scope of the invention described in the claims, and these are also included in the scope of the present invention. It goes without saying that it is a thing.

For example, the details of the components shown are merely exemplary and may be modified.

10 Walls 12, 14 Front walls, rear walls 16, 18 Partitions 20 Boxes 22 Interior space 30 Fittings 32 Steel structural members (hat-shaped steel sheet piles, steel pipe piles)
32a Flange 32b Arm 32c Fitting 32d Web 34 Fitting member 36 Fitting slit 38 Fixing member 40 Filler 40a Cut, dividing line 40b Opening

Claims (2)

A joint device used when connecting steel structural members that make up a wall body used as a water area structure or a land area structure.
A joint member formed of a circular steel pipe having an outer diameter D (30 mm ≤ D ≤ 250 mm) and a joint member.
A pair of fixing members arranged at a predetermined portion of the joint member at a predetermined distance in the cross-sectional direction are provided.
The joint member is provided with a fitting slit formed of an opening having a constant width extending in the longitudinal direction of the joint member at a predetermined portion in the cross-sectional direction.
The longitudinal direction of the pair of fixing members is fixed in the longitudinal direction of the predetermined portion of the joint member by continuous or intermittent welding, respectively .
The joint member is fixed to the steel structural member only by fixing the pair of fixing members in the longitudinal direction of a predetermined portion of the steel structural member by continuous or intermittent welding, respectively. A fitting device characterized by being configured. A joint device used when connecting steel structural members that make up a wall body used as a water area structure or a land area structure.
A joint member formed of a circular steel pipe having an outer diameter D (30 mm ≤ D ≤ 250 mm) and a joint member.
A pair of fixing members arranged at a predetermined portion of the joint member at a predetermined distance in the cross-sectional direction are provided.
The joint member is provided with a fitting slit formed by at least one cutting portion composed of a pair of parallel cutting lines extending in the longitudinal direction at a predetermined portion in the cross-sectional direction.
The longitudinal direction of the pair of fixing members is fixed in the longitudinal direction of the predetermined portion of the joint member by continuous or intermittent welding, respectively .
The joint member is fixed to the steel structural member only by fixing the pair of fixing members in the longitudinal direction of a predetermined portion of the steel structural member by continuous or intermittent welding, respectively. A fitting device characterized by being configured.

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