JP2015108251A - Welding assisting apparatus for steel pipe sheet pile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and reliably perform vertical joint welding of steel pipe sheet piles, without making a joint become a hindrance, when the steel pipe sheet piles are vertically joint-welded by being held in a horizontal direction on a construction site and the like.SOLUTION: A rotary auxiliary tool 20, which can be divided into at least two parts and which has a notched recess 21 provided in the state of facing a joint attached to an outer periphery of a steel pipe sheet pile 100, is attached to the outer periphery of the steel pipe sheet pile 100. The steel pipe sheet pile 100 fitted with the rotary auxiliary tool 20 is loaded on at least two rotary loading platforms 30, and supported to be rotatable in such a manner that a longitudinal axis line of the steel pipe sheet pile 100 is set as the center of rotation. Vertical joint welding is performed while the steel pipe sheet pile 100 is rotated by a rotary device 33 that is provided in at least one of the rotary loading platforms 30.

Description

  The present invention relates to a steel pipe sheet pile welding auxiliary device, and in particular, when a steel pipe sheet pile is held in a horizontal direction and welded longitudinally at a construction site or the like, the joint can be easily welded without being obstructed. It relates to a possible device.

  A steel pipe sheet pile is a member used when constructing a water stop wall by attaching a joint to the outer periphery of a steel pipe and connecting the joints of adjacent steel pipes. Specifically, it is used when building quay walls, revetments, wave breakwaters in rivers and rivers, earth retaining in urban civil engineering, deadlines, and steel pipe sheet pile foundations in bridges. There are various types of joints for steel pipe sheet piles, such as P-type, T-type, and L-type. For example, L-type and T-type, P-type and P-type, and P-type and T-type are adjacent to each other. By connecting sheet piles, water barriers such as earth retaining and deadlines are constructed.

  As described above, the steel pipe sheet pile is manufactured by manufacturing a unit member of a predetermined length (for example, about 10 m) at the factory, transporting it to the construction site, and then welding it to the desired length during construction in the ground, or in advance as desired. Weld it so that it becomes the length of and install it in the ground. However, as described above, since the steel pipe sheet pile is attached with a joint along the longitudinal direction of the outer periphery of the steel pipe main body, the joint becomes an obstacle when welding in the field, and various devices are required. Conventionally, the technique at the time of welding a steel pipe sheet pile in the field is proposed (for example, refer to patent documents 1).

  The technique described in Patent Document 1 relates to a longitudinal joining method when a steel pipe sheet pile is further added above a steel pipe sheet pile constructed in the ground at a construction site. In this steel pipe sheet pile longitudinal connection method, rather than filling the joint space with a water-stopping material after driving steel sheet piles such as steel sheet piles and steel pipe sheet piles, asphalt is mainly contained in the joint space before the steel sheet pile is driven. By filling the viscoelastic material, soil and sand are prevented from entering the joint space after being driven.

  In other words, this steel pipe sheet pile longitudinal joining method is a front-end side (female side) at the time of sheet pile placement among a pair of fitting joints provided on a steel sheet pile main body, and is preliminarily placed in a joint material space having a slit. The present invention relates to a longitudinal joint of a female side joint material when a steel sheet pile filled with a viscoelastic material mainly composed of asphalt is used as a waterproofing filler. In this steel pipe sheet pile longitudinal connection method, the upper and lower ends of the female side joint material in the upper and lower steel sheet piles are separated from the weld joint positions of the upper and lower steel sheet pile main bodies, and the upper and lower female sheets formed thereby. In the interval of the side joint material, a joint portion female side joint material having a length dimension filling the interval and having the same diameter and the same cross-sectional structure as the female side joint material is arranged, and the joint portions of both the female side joint materials are arranged. A steel strip having a predetermined width is applied to a position excluding the slit portion of the joint so as to cover, and welding joining is performed between the edge portion of the strip and the both female joint members. Yes.

JP 2004-92151 A

  However, the steel pipe sheet pile longitudinal joining method described in Patent Document 1 described above is a method in which the lower steel pipe sheet pile is constructed in the ground and the lower part of the upper steel pipe sheet pile is welded to the upper part of the steel pipe sheet pile protruding above the ground. Therefore, depending on the situation at the site, such a cascade connection method cannot be used.

  In addition, steel pipe sheet piles are generally transported from the factory to the construction site using a trailer, etc., depending on the safety standards of road transport vehicles and the conditions of the road used for transport, etc. Length is limited. For this reason, for example, a steel pipe sheet pile having a length of about 10 m is generally transported to a construction site, welded in the vertical direction at the construction site, and constructed as a steel pipe sheet pile having a desired length.

  As described above, there are various methods for welding the steel pipe sheet pile at the construction site, but when the steel pipe sheet pile cannot be welded in a standing state, it is necessary to lay the steel pipe sheet pile horizontally and weld it. is there. Furthermore, in order to longitudinally weld steel pipe sheet piles at the construction site, the steel pipe sheet pile is temporarily stopped and the placement work is resumed after the longitudinal welding is performed. There was a problem that the work time was prolonged.

  By the way, when pipe welding is carried out with the steel pipe pile lying down horizontally, since the joint is not attached to the outer periphery of the steel pipe pile, the steel pipe pile is placed on the turning roll and the steel pipe pile is rotated. It is possible to weld while On the other hand, when welding in the state where the steel pipe sheet pile with the joint already attached is laid down in the horizontal direction, the joint becomes an obstacle and the welding method using the turning roll cannot be applied as it is.

  The present invention has been proposed in view of the above-described circumstances, and when steel pipe sheet piles are held in a horizontal direction in a construction site or the like and welded longitudinally, the steel pipe sheet piles are easily and reliably connected without interfering with each other. It aims at providing the welding auxiliary device of the steel pipe sheet pile which can be welded longitudinally.

  The steel pipe sheet pile welding auxiliary device of the present invention has the following characteristics in order to achieve the above-described object. That is, the steel pipe sheet pile welding auxiliary device of the present invention is used when steel pipe sheet piles with joints attached along the longitudinal direction of the outer peripheral portion are held in a horizontal direction and are longitudinally welded in the longitudinal direction. It is a welding auxiliary device, and a cylindrical rotation auxiliary tool attached to the outer periphery of the steel pipe sheet pile and a steel pipe sheet pile attached with the rotation auxiliary tool are placed so that the axis of rotation in the longitudinal direction of the steel pipe sheet pile can be rotated. It is provided with at least two rotation mounting tables to support, and a rotation device that is provided on at least one of the rotation mounting tables and rotates the steel pipe sheet pile. And a rotation auxiliary tool can be divided | segmented into at least two, It has the notch recessed part provided facing the coupling attached to the outer periphery of a steel pipe sheet pile, It is characterized by the above-mentioned.

  Moreover, it is preferable that a rotation assistance tool is provided with the holding position adjustment member which contacts the outer peripheral surface of a steel pipe sheet pile, and adjusts the holding position of a steel pipe sheet pile so that the rotation center of a steel pipe sheet pile may become an appropriate position.

  Moreover, it is preferable that a rotation assistance tool is provided with the supporting member which receives and supports a steel pipe sheet pile when mounting a steel pipe sheet pile.

  According to the steel pipe sheet pile welding auxiliary device of the present invention, the rotation auxiliary tool can be divided into at least two parts, and has a notch recess provided facing the joint attached to the outer periphery of the steel pipe sheet pile. In the state where the tool is divided, the fitting is accommodated in the notch recess and the steel pipe sheet pile is placed, and then the rotation auxiliary tool is assembled integrally to form a cylindrical rotation auxiliary tool on the outer periphery of the steel pipe sheet pile to which the joint is attached. Can be attached.

  Thus, since a cylindrical rotation auxiliary tool can be attached to the outer peripheral part of the steel pipe sheet pile to which the joint is attached, the steel pipe sheet pile is placed on a rotary mounting table (for example, a turning roll) and is placed in the entire circumferential direction. It can be rotated smoothly. For this reason, even with steel pipe sheet piles with joints attached to the outer periphery, it is possible to carry out longitudinal welding easily and accurately using a rotating mounting table (turning roll) in the same manner as general steel pipe piles. Become.

  Moreover, since the rotation center of a steel pipe sheet pile can be hold | maintained in an appropriate position by providing a holding position adjustment member, when a steel pipe sheet pile is rotated, a steel pipe sheet pile does not shake, and longitudinal joining is smoothly performed. be able to.

  In addition, by providing a support member on the inner surface of the rotation assisting tool, when the steel pipe sheet pile is placed on the rotation assisting tool, the steel pipe sheet pile can be received and supported by the support member, and the steel pipe sheet pile is placed on the rotation assisting tool. It can prevent beforehand that a rotation assistance tool is damaged by the impact at the time of mounting.

The front view of the welding auxiliary equipment of the steel pipe sheet pile concerning the embodiment of the present invention. The side view of the welding auxiliary equipment of the steel pipe sheet pile concerning the embodiment of the present invention. The front view which shows the reinforcement member (outer reinforcement member) of the rotation assistance tool which concerns on embodiment of this invention. The front view which shows the reinforcement member (center reinforcement member) of the rotation assistance tool which concerns on embodiment of this invention. Explanatory drawing which shows the usage method of the welding assistance apparatus of the steel pipe sheet pile which concerns on embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIGS. 1 to 5 illustrate a steel pipe sheet pile welding auxiliary device (hereinafter referred to as a welding auxiliary device) according to an embodiment of the present invention. FIG. 1 is a front view of the welding auxiliary device, and FIG. FIG. 3 and FIG. 4 are front views showing the reinforcing member of the rotation assisting tool, and FIG. 5 is an explanatory view showing how to use the welding assisting device.

<Outline of welding assist device>
As shown in FIGS. 1 to 5, the welding auxiliary device 10 according to the embodiment of the present invention is a steel pipe to which joints (for example, a P-type joint 110 a and a T-type joint 110 b) are attached along the longitudinal direction of the outer peripheral portion. The apparatus is used when welding the sheet pile 100 in the horizontal direction in the state where the sheet pile 100 is laid in the horizontal direction, and the rotation auxiliary tool 20 and the rotation mounting table 30 are the main components.

<Rotation aid>
The rotation auxiliary tool 20 is a cylindrical member attached to the outer periphery of the steel pipe sheet pile 100, and can be divided into at least two (see FIGS. 1 and 2). Moreover, it has the notch recessed part 21 provided facing the coupling (P type joint 110a and T type joint 110b) attached to the outer periphery of the steel pipe sheet pile 100 (refer FIG.3 and FIG.4). The division | segmentation number of the rotation assistance tool 20 can be suitably changed according to the diameter of the steel pipe sheet pile 100, a weight, the condition of a welding field, etc., and may be three or more. Moreover, the position, the number, and the size of the notch recess 21 can be appropriately changed according to the position, the number, and the size of the joint attached to the outer peripheral portion of the steel pipe sheet pile 100.

<Reinforcing member>
The rotation assisting tool 20 of the present embodiment has a two-part cylindrical structure, and three reinforcing members are attached along the length direction. As shown in FIGS. 2 to 4, the reinforcing member is composed of a total of three cylindrical steel plates including two outer reinforcing members 40 and one central reinforcing member 50, and is provided to face the joints. It has a notch recess 21. Further, as shown in FIG. 3, the two outer reinforcing members 40 are provided with an operation recess 22 for operating the holding position adjusting member 60.

<Holding position adjustment member>
Moreover, as shown in FIG. 1, the rotation assistance tool 20 contacts the outer peripheral surface of the steel pipe sheet pile 100, and adjusts the holding position of the steel pipe sheet pile 100 so that the rotation center of the steel pipe sheet pile 100 becomes an appropriate position. A holding position adjusting member 60 is provided. The holding position adjusting member 60 has a U-shaped base 61 attached to the inner surface of the rotation assisting tool 20, a screw hole (not shown) provided on the upper surface of the base 61, and a holding attached to the screw hole. The position adjusting bolt 62 is included.

  The holding position adjusting bolt 62 is provided with a holding member 63 that holds the steel pipe sheet pile 100 in contact with the outer peripheral surface of the steel pipe sheet pile 100 so as to be positioned on the center side of the rotation assisting tool 20. Furthermore, it is preferable to provide a universal joint (not shown) between the holding position adjusting bolt 62 and the holding member 63, so that the holding member 63 can be brought into close contact with the outer peripheral surface of the steel pipe sheet pile 100. In the present embodiment, four holding position adjusting members 60 are attached to the inner surface of the rotation assisting tool 20 at equal intervals.

<Rotation table>
The rotary mounting table 30 is a member for mounting the steel pipe sheet pile 100 to which the rotation auxiliary tool 20 is attached and supporting the steel pipe sheet pile 100 rotatably about the longitudinal axis of the steel pipe sheet pile 100. And at least two are provided for support. In the present embodiment, a support column 35 for preventing the rotation assisting tool 20 from falling off or falling is provided on the upper part of the rotary mounting table 30. In addition, the number of the rotation mounting base 30 can be suitably changed according to the length, diameter, weight, etc. of the steel pipe sheet pile 100 to mount, and may be three or more.

  The rotary mounting table 30 of the present embodiment has a pair of rotating rollers 32 (turning rollers) on a carriage 31 provided with two pairs (four wheels in total) of wheels 34 along the width direction of the steel pipe sheet pile 100. ) Is rotatably mounted. In addition, at least two rotary mounting tables 30 are provided for one steel pipe sheet pile 100, and at least one of them rotates the steel pipe sheet pile 100 by driving a rotating roller 32 (turning roller). The rotating device 33 (for example, an electric motor) is connected (see FIG. 1).

<Supporting member>
Moreover, the rotation assistance tool 20 is provided with the supporting member 70 which receives and supports the steel pipe sheet pile 100, when mounting the steel pipe sheet pile 100. As shown in FIG. The support member 70 includes a pair of trapezoidal bases attached to the inner surface of the rotation assisting tool 20. As will be described in detail later, in order to attach the steel pipe sheet pile 100 to the rotation auxiliary tool 20, the lower half rotation auxiliary tool 20 is placed on the rotary mounting table 30 (rotating roller 32) in a state where the rotation auxiliary tool 20 is divided. To do. Then, the steel pipe sheet pile 100 is suspended from above the lower half rotation assisting tool 20 and placed on the lower half rotation assisting tool 20, and further the upper half rotation assisting tool 20 on the steel pipe sheet pile 100. And the rotation assisting tool 20 in the lower half and the upper half are joined together.

  The support member 70 is a member for preventing the steel pipe sheet pile 100 from impacting the rotation assisting tool 20 and damaging the rotation assisting tool 20 in the process of placing the steel pipe sheet pile 100. In this embodiment, the support member 70 is divided into two parts. One of the rotation assisting tools 20 (lower half) is provided.

<How to use the rotation aid>
In order to use the welding auxiliary device 10 of the present invention, as shown in FIG. Rail 90 is laid. Then, the wheels 34 of the rotary mounting table 30 are placed on the rails 90 provided on each iron plate 80. In addition, in order to weld the edge parts of the two steel pipe sheet piles 100, one set of rotary mounting bases 30 is required for each steel pipe sheet pile 100, but about either one of the steel pipe sheet piles 100 along the longitudinal direction. When it is not necessary to move, the rail 90 does not need to be laid in the lower part of the rotary mounting base 30 on which the steel pipe sheet pile 100 is mounted.

  Then, according to the length of the steel pipe sheet pile 100 to be welded, the position of the pair of rotary mounting tables 30 is adjusted, and one of the two rotation assisting tools 20 (the lower half) is mounted on the rotary mounting table 30. To do. Note that a support member 70 is provided on the rotation assisting tool 20 in the lower half part placed on the rotary mounting table 30.

  In this state, using a suspension device (not shown) such as a crane, the steel pipe sheet pile 100 is positioned on the upper part of the rotation assisting tool 20 in the lower half, and on the support member 70 of the rotation assisting tool 20 in the lower half. The steel pipe sheet pile 100 is suspended. And the rotation assistance tool 20 of the upper half part divided into 2 is covered above the steel pipe sheet pile 100, and it assembles | attaches so that the rotation assistance tool 20 may become united. Thereafter, the holding position adjusting member 60 is used to adjust the rotation center of the steel pipe sheet pile 100 to an appropriate position.

  When the placement of the two steel pipe sheet piles 100 to be welded is completed, the ends of the two steel pipe sheet piles 100 are butted together, and the rotating device 33 is driven to perform welding while rotating the steel pipe sheet pile 100 supported by the rotation auxiliary tool 20. Do.

<Application example of the present invention>
The steel pipe sheet pile 100 to which the present invention is applied is not limited in length, diameter, cross-sectional shape, shape, number, position, etc. of the joint to be attached, and the rotation aid 20 can be manufactured according to the steel pipe sheet pile 100 and the shape of the joint. For example, the present invention can be applied to steel pipe sheet piles 100 having various shapes. In other words, in the above-described embodiment, the cylindrical steel pipe sheet pile 100 in which the P-type joint 110a and the T-type joint 110b are opposed to each other and attached one by one has been described. The present invention can be applied even to a steel pipe sheet pile 100 or the like in which the joint shape and the attachment position are different from those of the embodiment.

DESCRIPTION OF SYMBOLS 10 Welding assistance apparatus 20 Rotation assistance tool 21 Notch recessed part 22 Operation recessed part 30 Rotation | restoration mounting base 31 Cart 32 Rotating roller 33 Rotating apparatus 34 Wheel 35 Support pillar 40 Outer reinforcement member 50 Central reinforcement member 60 Holding position adjustment member 61 Base 62 Holding position Adjustment bolt 63 Holding member 70 Supporting member 80 Laying iron plate 90 Rail 100 Steel pipe sheet pile 110a P-type joint 110b T-type joint

Claims (3)

Steel pipe sheet piles with joints attached along the longitudinal direction of the outer peripheral part are held in the horizontal direction, and are welding auxiliary devices used when longitudinally welding in the longitudinal direction,
Cylindrical rotation aid attached to the outer periphery of the steel pipe sheet pile,
Placing the steel pipe sheet pile with the rotation auxiliary tool mounted thereon, and supporting at least two rotary mounting tables rotatably supporting the longitudinal axis of the steel pipe sheet pile as a rotation center;
A rotation device provided on at least one of the rotation mounting tables, and rotating the steel pipe sheet pile,
The said rotation assistance tool can be divided | segmented into at least two, and has the notch recessed part provided facing the coupling attached to the outer periphery of the said steel pipe sheet pile, The welding auxiliary device of the steel pipe sheet pile characterized by the above-mentioned.   The rotation assisting tool includes a holding position adjusting member that abuts the outer peripheral surface of the steel pipe sheet pile and adjusts the holding position of the steel pipe sheet pile so that the rotation center of the steel pipe sheet pile becomes an appropriate position. The steel pipe sheet pile welding auxiliary device according to claim 1.   The said auxiliary | assistant rotation tool was equipped with the supporting member which receives and supports the said steel pipe sheet pile when mounting the said steel pipe sheet pile, The welding assistance apparatus of the steel pipe sheet pile of Claim 1 or 2 characterized by the above-mentioned.

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