JP6782876B1 - Fitting jig, steel sheet pile with fitting jig, and fitting method of steel sheet pile - Google Patents

Abstract

A jig for fitting the joint portion of the second steel sheet pile to the joint portion of the first steel sheet pile that is cast on the ground and forms a part of the continuous wall, and is a jig for fitting the joint portion of the second steel sheet pile in the wall extension direction of the continuous wall. Crosses the first surface directed in the introduction direction of the second steel sheet pile, intersects the wall crossing direction of the continuous wall, intersects the guide surface adjacent to the first surface in the wall crossing direction, and intersects in the height direction. The introduction surface located below the guide surface, the facing portion extending in the wall extension direction and facing the introduction surface at a distance, and the protruding portion protruding from the tip side of the facing portion in the wall extension direction to the introduction surface side. A fitting jig including a first connecting member joined to the base end side of the facing portion in the wall extension direction and arranged so as to extend along the first side surface of the first steel sheet pile is provided.

Description

The present invention relates to a fitting jig, a steel sheet pile with a fitting jig, and a method of fitting a steel sheet pile.

Conventionally, as a jig for fitting a steel sheet pile or the like at a joint portion, for example, a fitting jig or the like as described in the following documents has been proposed.

Patent Document 1 includes a holding portion that is detachably attached to the upper end portion of the pile, and an expanded pile guide member that is provided so as to project from the shoulder of the holding portion so as to correspond to the joint portion of the pile. Auxiliary tools for pile fitting are disclosed.

In Patent Document 2, the covering portion covering the upper surface of the joint portion formed in the shape of a plan view hook of the existing steel sheet pile and the lower end surface of the joint portion connected in the covering portion and formed in the shape of the plan view hook of the newly installed steel sheet pile are fitted. It is provided with a guide portion having an insertion portion for forming an insertable insertion opening, and the guide portion has an opening in the return direction of the joint portion of the new steel sheet pile, and the opening width of the opening is the new steel sheet pile. A steel sheet pile driving jig formed to be larger than the width of the joint portion of the steel sheet pile is disclosed.

In Patent Document 3, the cross-sectional shape is almost the same as that of a steel sheet pile having claws at both ends, and the guide groove portion corresponding to the claw is aligned by cutting out the upper end corner of the outer peripheral wall to increase the opening. It is a guide jig for use, and when it is placed on the upper end of the existing steel sheet pile so as to extend it, a locking piece to be attached to the upper end side surface of the existing steel sheet pile is projected downward and this A guide jig for aligning a steel sheet pile having a window hole for inserting a tightening metal fitting for tightening and fixing with an existing steel sheet pile and a tightening metal fitting via one or a part of the locking pieces is disclosed. ..

Patent Document 4 discloses a fitting auxiliary jig for fitting a plurality of steel sheet piles at a joint portion. The fitting auxiliary jig includes a steel sheet pile cover portion fixed to the leading steel sheet pile and a shaking suppressing portion with which the joint portion of the trailing steel sheet pile is brought into contact. The shaking suppressing portion has a first plate material on which the first contact surface is formed and a second plate material on which the second contact surface is formed, and is sandwiched between the first plate material and the second plate material. An inner space is formed for interpolating the joint portion of the trailing steel sheet pile. The first plate material and the second plate material are arranged so as to have a predetermined angle with each other in the plane direction, and after the joint portion of the trailing steel sheet pile is brought into contact with the first contact surface or the second contact surface. , The joint portion of the trailing steel sheet pile is fitted to the joint portion of the leading steel sheet pile.

Japanese Unexamined Patent Publication No. 54-162804 JP-A-2007-255072 Japanese Unexamined Patent Publication No. 2014-133980 Japanese Unexamined Patent Publication No. 2016-68937

Here, for example, when the joint portion of the trailing steel sheet pile lifted by a crane or the like is fitted to the joint portion of the leading steel sheet pile placed in the ground, the trailing steel is positioned above the joint portion of the leading steel sheet pile. After guiding the joint portion of the sheet pile, the trailing steel sheet pile is lowered to fit each joint portion. At this time, it is necessary for the worker to hold the position by manually supporting the trailing steel sheet pile. Therefore, when the trailing steel sheet pile swings due to a strong wind or the like, it is difficult to stabilize the position holding of the trailing steel sheet pile, and the fitting operation is difficult. Therefore, facilitation of fitting work of steel sheet piles is an issue.

In this respect, it is difficult to guide the joint portion of the trailing steel sheet pile to a position above the joint portion of the leading steel sheet pile with the fitting auxiliary tool of Patent Document 1. Therefore, it is difficult to solve the above-mentioned problems with the fitting aid of Patent Document 1.

Further, in the fitting jigs and the like of Patent Documents 1 to 4, when the trailing steel sheet pile is lowered, the joint portion of the trailing steel sheet pile may come off from the fitting jig or the like. Therefore, it is difficult to solve the above-mentioned problems with the fitting jigs and the like of Patent Documents 1 to 4.

Therefore, the present invention has been devised in view of the above-mentioned problems, and an object of the present invention is a fitting jig and a fitting jig capable of facilitating the fitting work of steel sheet piles. per sheet piles, and to provide a fitting method of the steel sheet pile.

[1] A jig for fitting the joint portion of the second steel sheet pile to the joint portion of the first steel sheet pile, which is driven into the ground and forms a part of the continuous wall, and is a jig of the continuous wall. The first surface, which intersects in the wall extension direction and is directed to the introduction direction of the second steel sheet pile, intersects the wall crossing direction of the continuous wall, and intersects the guide surface adjacent to the first surface in the wall crossing direction. An introduction surface located below the guide surface in the height direction, an opposing portion extending in the wall extension direction and facing the introduction surface at a distance, and protruding from the tip side of the facing portion in the wall extension direction to the introduction surface side. A fitting jig including a projecting portion to be formed and a first connecting member joined to the base end side of the facing portion in the wall extension direction and arranged so as to extend along the first side surface of the first steel sheet pile.
[2] The fitting jig includes a first guide tool having a first surface, a guide surface, and an introduction surface, and a second guide tool having a facing portion, a protruding portion, and a first connecting member. The fitting jig according to [1], which includes a contact portion in contact with the first guide tool and a recess formed between the contact portion and the protruding portion and open to the first guide tool side.
[3] The first guide tool includes a first plate member forming the first surface, a second plate member that contacts the first plate member at one end in the wall extension direction to form an guide surface and an introduction surface, and a second plate member. A first plate member between the projecting portion and the second plate member along the wall crossing direction, including a third plate member that is in contact with the other end of the plate member in the wall extension direction and forms a surface facing the first surface. At least one of the shortest distance and the second shortest distance between the protrusion and the third plate member is the maximum of the joint portion of the second steel sheet pile in the direction orthogonal to the width direction of the second steel sheet pile. The fitting jig according to [2], which is smaller than the length.
[4] At least one of the first plate member, the second plate member, and the third plate member is inclined with respect to the height direction, and the first guide tool is generally from the lower side to the upper side in the height direction. The fitting jig according to [3], which expands toward.
[5] The first guide tool is connected to the second guide tool in a state of being temporarily fixed to the facing portion by a temporary fixing member or spot welding, according to any one of [2] to [4]. The described fitting jig.
[6] The fitting jig according to any one of [2] to [4], wherein the first guide is connected so as to be rotatable relative to the second guide.
[7] A second connecting member arranged so as to extend along a second side surface facing the first side surface of the first steel sheet pile is further provided, and the facing portion is a combination of the first connecting member and the second connecting member. The fitting jig according to any one of [1] to [6], which is sandwiched between the fitting jigs.
[8] The fitting jig according to any one of [1] to [7], wherein the facing portion extends below the introduction surface in the height direction.
[9] The fitting jig according to any one of [1] to [8], further comprising an insertion portion for inserting a cord-like member connected to a second steel sheet pile.
[10] A method of fitting the joint portion of the second steel sheet pile to the joint portion of the first steel sheet pile by using the fitting jig according to any one of [1] to [9]. Then, the mounting process of mounting the fitting jig on the upper end of the arm portion adjacent to the joint portion of the first steel sheet pile, and the mounting process of overlapping with the first surface when viewed from the wall extension direction and viewed from the wall crossing direction. In the guidance process in which the lower end of the joint portion of the second steel sheet pile is guided in a suspended state at a position overlapping the guide surface, and at a position between the introduction surface and the facing portion, along the guide surface and the introduction surface. In the lowering process of lowering the lower end of the joint portion of the second steel sheet pile, and in the joint portion of the first steel sheet pile provided below the facing portion along the height direction, the second steel sheet pile A method of fitting a steel sheet pile, which includes a fitting step of fitting a joint portion.
[11] The fitting jig includes a first guide having a first surface, a guide surface, and an introduction surface, and a second guide having a facing portion, a protruding portion, and a first connecting member, and is used in the fitting step. Later, the temporary fixing member or spot welding that temporarily fixes the first guide tool and the facing portion is removed, and then the first guide tool and the second guide tool are removed in the order of the first guide tool and the second guide tool. [10] The method for fitting a steel sheet pile, further comprising a removal step.
[12] A steel sheet pile with a fitting jig in which the fitting jig according to any one of [1] to [9] is placed on the upper end of a portion adjacent to the joint portion.

According to the above [1] to [12], the fitting jig has a first surface, an introduction surface, an induction surface, a facing portion and a protruding portion. Therefore, the second steel sheet pile can be easily guided in the fitting jig by the first surface and the guiding surface. Further, when the second steel sheet pile is lowered, the introduction surface, the facing portion, and the protruding portion can prevent the joint portion from coming off the fitting jig. This makes it possible to facilitate the fitting work of the steel sheet pile. Further, as the fitting work is facilitated, the position adjustment before placing the second steel sheet pile for the purpose of ensuring verticality and adjusting the fitting angle is also facilitated, and improvement in construction accuracy can be expected.

In particular, according to [2], the facing portion has a recess. Therefore, the second steel sheet pile can be lowered while the lower end of the joint portion of the second steel sheet pile is arranged in the recess. As a result, when lowering the second steel sheet pile, it is possible to easily prevent the joint portion from coming off the fitting jig.

In particular, according to [3], at least one of the first shortest distance and the second shortest distance is more than the maximum length of the joint portion of the second steel sheet pile in the direction orthogonal to the width direction of the second steel sheet pile. Is also small. Therefore, when the second steel sheet pile is lowered, the joint portion can be prevented from coming out from between the introduction surface and the facing portion regardless of the angle of the second steel sheet pile, and the position can be easily maintained. This makes it possible to further facilitate the fitting work of the steel sheet pile.

In particular, according to [4], the first guide tool expands from the lower side to the upper side in the height direction as a whole. Therefore, the range in the first guide tool that can be introduced to lower the second steel sheet pile can be easily expanded. This makes it possible to easily guide the second steel sheet pile.

In particular, according to [5], the first guide tool is connected to the second guide tool in a state of being temporarily fixed to the facing portion by a temporary fixing member or spot welding. Therefore, the first guide tool and the second guide tool can be easily attached and detached, and can be handled as separate members. As a result, it is possible to easily remove the fitting jig after fitting each joint portion, and it is possible to smoothly carry out work such as placing a second steel sheet pile after fitting. Become.

In particular, according to [6], the first guide is connected so as to be rotatable relative to the second guide. Therefore, the positional relationship between the first guide tool and the second guide tool can be changed without separating the first guide tool and the second guide tool. As a result, it is possible to easily remove the fitting jig after fitting each joint portion, and it is possible to smoothly carry out work such as placing a second steel sheet pile after fitting. Become.

In particular, according to [7], the facing portion is sandwiched between the first connecting member and the second connecting member. Therefore, the fitting jig can be easily temporarily placed on the joint portion of the steel sheet pile. This makes it possible to facilitate the work of placing the fitting jig.

In particular, according to [8], the facing portion extends below the introduction surface in the height direction. Therefore, when lowering the second steel sheet pile, the position of the lower end of the joint portion of the second steel sheet pile can be visually recognized from the lower side of the introduction surface. That is, since the fitting state when fitting the second steel sheet pile to the steel sheet pile can be visually confirmed, the position adjustment when fitting each joint portion can be performed more easily, and the fitting operation can be performed. Can be performed more accurately.

In particular, according to [9], the fitting jig includes an insertion portion through which a cord-like member connected to the second steel sheet pile is inserted. Therefore, the second steel sheet pile can be guided into the fitting jig by using the cord-shaped member, and the chance of the worker directly touching the second steel sheet pile can be reduced. This makes it possible to safely carry out work such as introduction of the second steel sheet pile.

In particular, according to [10], the fitting method according to [1] to [9] is used as the fitting method for the steel sheet pile. Therefore, when performing the induction process, the descent process, and the fitting process, it is possible to reduce the load on the worker and improve the safety. This makes it possible to facilitate the fitting work of the steel sheet pile.

In particular, according to [11], in the removal step, the first guide tool and the second guide tool are removed in the order of the first guide tool and the second guide tool. Therefore, it is possible to easily remove the fitting jig after the fitting step, and it is possible to smoothly carry out the second steel sheet pile driving step and the like.

In particular, according to [12], the steel sheet pile includes the fitting jig according to any one of [1] to [9]. Therefore, it is possible to realize the fitting work of the steel sheet pile in consideration of reducing the load on the worker and improving the safety.

It is a perspective view which shows an example of a fitting jig, a steel sheet pile, and a continuous wall in this embodiment. It is a top view which shows the hat-shaped steel sheet pile of the continuous wall in which the fitting jig in this embodiment is used. It is a top view which shows the continuous wall in which the fitting jig in this embodiment is used. It is a front view of FIG. 3A. It is a perspective view which shows an example of the fitting jig in this embodiment. It is a perspective view which shows an example of the fitting jig in this embodiment. It is a perspective view which shows an example of the fitting jig in this embodiment. It is a top view when the joint part of a steel sheet pile is guided to the fitting jig in this embodiment. It is a top view when the joint part of a steel sheet pile is guided to the fitting jig in this embodiment. It is a perspective view which shows an example of the fitting method of the steel sheet pile in this embodiment. It is a perspective view which shows an example of the fitting method of the steel sheet pile in this embodiment. It is a perspective view which shows an example of the fitting method of the steel sheet pile in this embodiment. It is a perspective view which shows the 1st modification of the fitting jig in this embodiment. It is a perspective view of the 1st guide in the example of FIG. 7A. It is a perspective view which shows the 2nd modification of the fitting jig in this embodiment. It is a perspective view of the 2nd guide in the example of FIG. 8A. It is sectional drawing of the 2nd guide tool in the example of FIG. 8A. It is a perspective view which shows the 3rd modification of the fitting jig in this embodiment. It is a perspective view of the 1st guide in the example of FIG. 9A. It is a perspective view which shows the 4th modification of the fitting jig in this embodiment. It is a perspective view of the 1st guide in the example of FIG. 10A. FIG. 3 is a perspective view showing another example of the insertion portion of the second guide tool in the example of FIG. 10A. It is a perspective view which shows the 5th modification of the fitting jig in this embodiment. It is a perspective view of the 1st guide in the example of FIG. 11A. It is a perspective view which shows the example which connected the guide tool by using the shaft member. It is a perspective view of the 1st guide in the example of FIG. 12A. It is a perspective view of the state which the 1st guide tool was swirled in the example of FIG. 12A. It is a perspective view of the state which the 1st guide tool was further swirled in the example of FIG. 12A. It is a perspective view which shows the 6th modification of the fitting jig in this embodiment. It is a perspective view of the 2nd guide in the example of FIG. 13A. It is a perspective view which shows the L-shaped first guide tool among the 7th modification of the fitting jig in this embodiment. It is a perspective view which shows the curved first guide tool among the 7th modification of the fitting jig in this embodiment. It is a perspective view which shows the structure which combined the modification of the fitting jig in this embodiment. It is a perspective view which shows the 1st guide in the example of FIG. 16A. It is a perspective view which shows the 2nd guide in the example of FIG. 16A. It is a top view which shows the Z-shaped steel sheet pile of the continuous wall in which the fitting jig in this embodiment is used. It is an enlarged view in the one-dot chain line frame in FIG. 17A. FIG. 17A is a plan view showing a Z-shaped steel sheet pile of a continuous wall cast from a direction different from that of FIG. 17A. It is an enlarged view in the one-dot chain line frame in FIG. 18A. It is a top view which shows the other example of the hat-shaped steel sheet pile of the continuous wall in which the fitting jig in this embodiment is used. It is an enlarged view in the one-dot chain line frame in FIG. 19A. FIG. 19A is a plan view showing still another example of a hat-shaped steel sheet pile of a continuous wall cast from a direction different from that of FIG. 19A. It is an enlarged view in the one-dot chain line frame in FIG. 20A. It is a top view which shows the U-shaped steel sheet pile of the continuous wall in which the fitting jig in this embodiment is used. It is an enlarged view in the one-dot chain line frame in FIG. 21A. It is a schematic plan view which shows an example of a male joint part. It is a schematic plan view which shows an example of a female joint part. It is a perspective view which shows still another example of the fitting jig which concerns on embodiment of this invention. It is a figure which looked at the fitting jig shown in FIG. 23A from a different angle.

Hereinafter, a fitting jig to which the present invention is applied, a steel sheet pile, a method for fitting a steel sheet pile, and a mode for carrying out a continuous wall will be described in detail with reference to the drawings.

(Embodiment: fitting jig 1, steel sheet pile 4, continuous wall 9)
In the fitting jig 1 of the present embodiment, as shown in FIG. 1, a plurality of steel sheet piles 4 are fitted at the joint portion 5, and the plurality of steel sheet piles 4 are wall-extended direction X (width direction of the steel sheet pile 4). It is used to build a continuous wall 9 connected to.

The continuous wall 9 in the present embodiment is constructed so as to separate both sides in the wall crossing direction Y by connecting a plurality of steel sheet piles 4 in the wall extension direction X and sequentially driving them into the ground. The continuous wall 9 is formed by placing a plurality of steel sheet piles 4 having a predetermined extension in the height direction Z to a predetermined depth in the ground.

The steel sheet pile 4 in the present embodiment includes a fitting jig 1. The fitting jig 1 provided in the steel sheet pile 4 may be removed after being connected to another steel sheet pile 4, for example.

As shown in FIG. 2, for example, the steel sheet pile 4 has a web portion 61, a pair of flange portions 62, a pair of arm portions 63, and a pair of joint portions 5. Each joint portion 5 is formed with a fitting groove 5b for fitting the fitting claws 5a of the joint portions 5 adjacent to each other. As the steel sheet pile 4, for example, a hat-shaped steel sheet pile is used.

The web portion 61 extends in the wall extending direction X, and is formed in a substantially flat plate shape, for example. The pair of flange portions 62 are formed so as to be inclined in the wall crossing direction Y from both ends of the wall extension direction X in the web portion 61. The pair of arm portions 63 are formed substantially parallel to the web portion 61 from one end of the wall extension direction X in each flange portion 62. The pair of joint portions 5 are formed at the tip of each arm portion 63 in the wall extension direction X (one end on the outer side in the width direction of the steel sheet pile 4).

The continuous wall 9 has a first steel sheet pile 41 and a second steel sheet pile 42, as shown in FIGS. 3A and 3B. The first steel sheet pile 41 is previously driven into the ground 8 and already forms a part of the continuous wall 9. The second steel sheet pile 42 is driven after the first steel sheet pile 41. The steel sheet piles 41 and 42 are connected adjacent to each other in the wall extension direction X of the continuous wall 9 by fitting the joint portion 52 of the second steel sheet pile 42 to the joint portion 51 of the first steel sheet pile 41. Will be done.

The fitting jig 1 includes, for example, a first guide tool 2 and a second guide tool 3, as shown in FIGS. 4A to 4C. The fitting jig 1 is used, for example, in a state where the first guide tool 2 and the second guide tool 3 are connected to each other.

The first inducer 2 has a first surface 21a and a second surface 22a. The first surface 21a is a surface that intersects the wall extension direction X of the continuous wall 9 and is directed in the introduction direction of the second steel sheet pile 42. The second surface 22a is a surface that intersects the continuous wall 9 in the wall crossing direction Y.

For example, as shown in FIG. 4B, the second surface 22a includes an induction surface 22aa and an introduction surface 22ab. In the illustrated example, the introduction surface 22ab is a portion that overlaps with the facing portion 31 of the second guide tool 3, which will be described later, when viewed from the wall crossing direction Y. The guide surface 22aa is located above the introduction surface 22ab when viewed from the wall crossing direction Y (that is, the introduction surface 22ab is located below the guidance surface 22aa) and is a portion adjacent to the first surface 21a. .. The guide surface 22aa and the introduction surface 22ab may be formed continuously or, for example, separated from each other.

The second guide tool 3 has a facing portion 31, a protruding portion 32, and a first connecting member 33. The facing portion 31 extends in the wall extension direction X of the continuous wall 9 and faces the introduction surface 22ab included in the second surface 22a of the first guide tool 2 apart from each other. The projecting portion 32 projects from the tip end side of the facing portion 31 in the wall extension direction X toward the second surface 22a. The first connecting member 33 is joined to the base end side of the facing portion 31 in the wall extending direction X, and is arranged so as to extend from the facing portion 31 along the side surface of the first steel sheet pile 41. With such a first connecting member 33, the second guide tool 3 can be positioned with respect to the first steel sheet pile 41 in the wall crossing direction Y.

The first guide tool 2 has, for example, a first plate member 21, a second plate member 22, and a third plate member 23. The first plate member 21 forms the first surface 21a. The second plate member 22 comes into contact with the first plate member 21 at one end of the wall extension direction X of the continuous wall 9 to form the second surface 22a. The third plate member 23 is in contact with the other end of the wall extension direction X of the second plate member 22 and forms a surface facing the first surface 21a.

For example, the width of the first plate member 21 (the length of the first plate member 21 in the wall crossing direction Y of the continuous wall 9) is the width of the third plate member 23 (the length of the third plate member 23 in the wall crossing direction Y). ) Is larger than. For example, when viewed from the wall crossing direction Y, at least a part of the first plate member 21 is located above the facing portion 31. For example, along the height direction Z, the second plate member 22 and the third plate member 23 extend from a position substantially equal to the lower end of the facing portion 31 to a position substantially equal to the upper end of the first plate member 21.

The first guide tool 2 may have, for example, a fourth plate member 24. The fourth plate member 24 is provided below the first plate member 21 in the height direction Z, and is in contact with one end of the wall extension direction X of the second plate member 22. The fourth plate member 24 is provided so as to face the third plate member 23, and is separated from the third plate member 23 by the first plate member 21. The fourth plate member 24 has a connecting surface 24a in contact with the facing portion 31, and the second guiding tool 3 is connected to the first guiding tool 2 via the connecting surface 24a. The connection surface 24a may be joined to the facing portion 31 by welding or the like, or may be temporarily fixed to the facing portion 31 by a temporary fixing member such as a tightening metal fitting (for example, a C-type clamp) or a magnet, or by spot welding. Good. For example, when the first guide tool 2 does not have the fourth plate member 24, a connecting surface may be formed on the first plate member 21.

As the plate members 21, 22, 23, 24, for example, ordinary steel, cast steel, cast iron, or FRP (Fiber-Reinforced Plastics) is used. When cast steel is used as the material, the friction coefficient of the surface of the member is about 0.2, which is less than half of the friction coefficient of the steel material (about 0.45 to 0.55). Therefore, the second steel sheet pile 42 The slipperiness is improved, and the introduction of the second steel sheet pile 42 in the fitting jig 1 can be easily carried out. Further, for example, in the case of integrated casting made of cast steel, it is possible to facilitate shape optimization and reduce the cost of welding build-up and cutting.

The thickness of each plate member 21, 22, 23, 24 is, for example, 6 mm or more and 25 mm or less. The thickness of each plate member 21, 22, 23, 24 is particularly preferably 9 mm or more and 17 mm or less. In this case, the strength and weldability can be ensured, the weight range can be set within the weight range that can be handled manually, and the load at the time of carrying can be reduced. The surface of the first surface 21a, the surface of the third plate member 23 facing the first surface 21a, and the surface of the fourth plate member 24 parallel to the first surface 21a are substantially orthogonal to, for example, the second surface 22a.

The height H1 of the second plate member 22 and the third plate member 23 is, for example, 60 mm or more, for example, about 100 mm or more and 300 mm or less along the height direction Z. The width W1 on the upper end side of the second plate member 22 is 50 mm or more along the wall extension direction X. The width W1 is particularly preferably 100 mm or more and 200 mm or less. In this case, the second steel sheet pile 42 can be easily guided into the fitting jig 1 and the load at the time of carrying can be reduced. The width of the lower end side of the second plate member 22 may be larger than the width W1, and can be designed according to, for example, the shape of the facing portion 31 and the connection position between the facing portion 31 and the connecting surface 24a.

Along the height direction Z, the height H1a of the guide surface 22aa is, for example, 30 mm or more. The height H1a is particularly preferably about 50 mm or more and 150 mm or less. In this case, the second steel sheet pile 42 can be easily guided into the fitting jig 1 and the load at the time of carrying can be reduced. In addition, along the height direction Z, the height of the first plate member 21 is about the same as the height H1a, and may be larger than, for example, the height H1a.

The height H1b of the introduction surface 22ab is, for example, 30 mm or more along the height direction Z. The height H1b is particularly preferably 50 mm or more and 150 mm. In this case, it is easy to adjust the joint portion 52 of the second steel sheet pile 42 to the fitting position with the joint portion 51 of the first steel sheet pile 41, and it is easy to carry. Load can be reduced. The height of the fourth plate member 24 is about the same as the height H1b, and may be larger than, for example, the height H1b.

The facing portion 31 has a contact portion 31a and a recess 31b, for example, as shown in FIG. 4C. For example, the connection surface 24a of the first inducer 2 is brought into contact with the contact portion 31a. The recess 31b is formed between the contact portion 31a and the protrusion 32, and opens toward the first guide tool 2 side along the wall extension direction X. That is, the inner surface of the recess 31b faces the second plate member 22. Therefore, a space surrounded by the second plate member 22, the third plate member 23, the fourth plate member 24, the protruding portion 32, and the recess 31b is formed, and between the third plate member 23 and the protruding portion 32. A gap is formed.

As the facing portion 31 and the protruding portion 32, for example, the arm portion 63 and the joint portion 5 are cut out from the steel sheet pile 4, and the length in the height direction Z is appropriately removed, and then a part of the fitting claw 5a of the joint portion 5 (FIG. The one from which the removal portion 32a of 4C) has been removed is used. The facing portion 31 and the protruding portion 32 that do not remove a part of the fitting claw 5a of the joint portion 5 (that is, the arm portion 63 and the joint portion 5 are cut out from the steel sheet pile 4 and have a length in the height direction Z. In this case, the recess 31b corresponds to the fitting groove 5b. However, it is possible to widen the space between the introduction surface 22ab and the recess 31b by using the one in which a part of the fitting claw 5a of the joint portion 5 is removed (the second guide 3 in FIG. 4C). The second steel sheet pile 42 guided into the fitting jig 1 can be easily introduced into the recess 31b of the second guide tool 3, and the second steel sheet pile 42 can be easily lowered. Is possible and preferable. Further, as the facing portion 31 and the protruding portion 32, for example, a member having a shape similar to that of the arm portion 63 and the joint portion 5 may be used.

The first connecting member 33 is joined to, for example, the facing portion 31 by welding or the like. The surface of the facing portion 31 in contact with the first connecting member 33 may be the same surface as the contact portion 31a, in addition to the surface facing the contact portion 31a. As the first connecting member 33, for example, the same material as each plate member 21, 22, 23, 24 is used. The thickness of the first connecting member 33 is about the same as the thickness of each plate member 21, 22, 23, 24.

The height H2 of the facing portion 31 along the height direction Z is, for example, about the same as the height H1b. The height H3 at which the first connecting member 33 extends downward from the facing portion 31 along the height direction Z is 30 mm or more. The height H3 is particularly preferably 50 mm or more and 100 mm or less. In this case, the fitting jig 1 can be placed on the first steel sheet pile 41 in a stable state, and the load during carrying is reduced. can do.

The width W2 of the facing portion 31 along the wall extension direction X is, for example, 200 mm or less, and is arbitrary as long as a portion in contact with the protruding portion 32, the recess 31b, the contact portion 31a, and the first connecting member 33 can be secured. .. The width W3 of the first connecting member 33 is, for example, 30 mm or more along the wall extension direction X. The width W3 is particularly preferably 40 mm or more and 80 mm or less. In this case, the fitting jig 1 can be placed on the first steel sheet pile 41 in a stable state, and the load during carrying is reduced. be able to.

When the first guide tool 2 and the second guide tool 3 having the dimensions as in the above example are assembled, the size of the entire fitting jig 1 is 200 mm in the wall extension direction X of the continuous wall 9, and the wall crossing direction Y. It is about 200 mm and about 300 mm in the height direction Z. Handleability is improved by making the size within this range. Further, in the above example, the total weight of the fitting jig 1 is about 25 kg, and one worker can easily carry it.

As shown in FIG. 5A, for example, the fitting jig 1 guides the joint portion 52 of the second steel sheet pile 42 into the fitting jig 1, and then mates with the joint portion 51 of the first steel sheet pile 41. In order to make the joint portion 52, a joint portion 52 is introduced between the second plate member 22 and the facing portion 31. At this time, when the joint portion 52 moves to the outside of the fitting jig 1 (in the direction of the arrows in FIGS. 5A and 5B) due to, for example, a strong wind, the protruding portion 32 or the third plate member 23 comes into contact with the joint portion 52. In this way, when the joint portion 52 is fitted to the joint portion 51 of the first steel sheet pile 41, the fitting jig 1 is used to prevent the joint portion 52 from coming off in the wall extension direction X of the continuous wall 9. It can be suppressed.

In particular, the first shortest distance D21 between the protrusion 32 and the second plate member 22 and the second shortest distance between the protrusion 32 and the third plate member 23 along the wall crossing direction Y of the continuous wall 9. By setting at least one of the distances D22 to a predetermined value, it is possible to easily prevent the joint portion 52 from coming off. More specifically, the maximum width D1 of the joint portion 52 introduced between the second plate member 22 and the facing portion 31 along the wall crossing direction Y (or orthogonal to the width direction of the second steel sheet pile 42). When the maximum length of the joint portion 52 of the second steel sheet pile 42 in the direction) is larger than at least one of the first shortest distance D21 and the second shortest distance D22, for example, the angle at which the joint portion 52 is introduced. Regardless, it is possible to prevent the joint portion 52 from coming off.

(Embodiment: Steel sheet pile fitting method)
Next, an example of the method of fitting the steel sheet pile in the present embodiment will be described with reference to FIGS. 6A to 6C. The method of fitting the steel sheet piles in the present embodiment is used to fit a plurality of steel sheet piles 4 at the joint portion 5 by using the fitting jig 1. In the method of fitting the steel sheet piles, the second steel sheet pile 42 suspended from a crane or the like is guided into the fitting jig 1, and the second steel sheet pile 42 is lowered to fit each joint portion 5. .. The fitting method of the steel sheet pile includes a mounting step, a guiding step, a descent step, and a fitting step.

In the mounting step, for example, as shown in FIG. 6A, the joint portion 51 on the non-fitting side of the first steel sheet pile 41 placed in the ground 8 (see FIG. 3B) and the arm portion 63 adjacent thereto. The fitting jig 1 is placed so that the facing portion 31 of the second guide 3 and the lower end of the protruding portion 32 are in contact with the upper end of the second guide tool 3 (arrow in FIG. 6A). At this time, the first connecting member 33 is arranged along the facing portion 31 and the side surface of the arm portion 63 of the first steel sheet pile 41 (for example, the first side surface 41a: see FIG. 8C). As a result, the first connecting member 33 comes into contact with the side surface of the arm portion 63, the fitting jig 1 is positioned with respect to the first steel sheet pile 41 in the wall crossing direction Y, and is fitted to the first steel sheet pile 41. The jig 1 can be easily placed.

After that, in the mounting step, the first connecting member 33 is temporarily fixed to the first steel sheet pile 41 by, for example, a temporary fixing member such as a tightening metal fitting or a magnet, or spot welding. In the mounting step, the first connecting member 33 may be joined to the first steel sheet pile 41 by, for example, welding joining, or for example, welding joining and a temporary fixing member may be used. The number of temporary fixing members used in the mounting step is arbitrary.

In the guiding step, for example, as shown in FIG. 6B, the lower end of the joint portion 52 of the second steel sheet pile 42 to be fitted to the first steel sheet pile 41 is guided into the fitting jig 1 in a suspended state. (Arrow in FIG. 6B). The lower end of the joint portion 52 is guided to a position where it overlaps with the first surface 21a when viewed from the wall extending direction X and overlaps with the guiding surface 22aa when viewed from the wall crossing direction Y. In the guiding step, when guiding the lower end of the joint portion 52 to a predetermined position, for example, even if the lower end of the joint portion 52 is brought into contact with at least one of the first surface 21a, the guiding surface 22aa, and the third plate member 23. Good.

The fitting jig 1 is not provided with a member or the like at a position facing the guide surface 22aa. Therefore, the position of the fitting jig 1 during the fitting operation can be visually recognized from the wall crossing direction Y, and the lower end of the joint portion 52 is placed in the fitting jig 1 along the wall crossing direction Y. It can be easily induced. For example, a magnet may be installed on at least one of the guiding surface 22aa and the first surface 21a. In this case, the magnet assists in guiding the lower end of the joint portion 52, and the time of the guiding step can be shortened. The installed magnet is removed, for example, as soon as the guidance of the lower end of the joint portion 52 is completed.

In the lowering step, for example, as shown in FIG. 6C, the lower end of the joint portion 52 of the second steel sheet pile 42 is lowered along the second surface 22a at a position between the introduction surface 22ab and the facing portion 31. At this time, for example, as shown in FIGS. 5A and 5B, it is possible to prevent the joint portion 52 from coming off in the wall extension direction X. Further, the facing portion 31 is provided so as to face the introduction surface 22ab. Therefore, it is possible to prevent the joint portion 52 from coming off even in the wall crossing direction Y.

In the fitting step, the second steel sheet pile 42 is further lowered along the height direction Z, and the second steel is placed in the joint portion 51 of the first steel sheet pile 41 provided below the facing portion 31. The joint portion 52 of the sheet pile 42 is introduced, and the joint portions 51 and 52 of the steel sheet piles 41 and 42 are fitted together. The shape of the facing portion 31 is similar to or matches the shape of the joint portion 51 of the first steel sheet pile 41. Therefore, the fitting portions 51 and 52 can be easily fitted only by finely adjusting the position of the joint portion 52 of the second steel sheet pile 42 in the descent step.

The method of fitting the steel sheet pile in the present embodiment may include, for example, a removing step after the fitting step. In the removal step, first, the temporary fixing member or spot welding that temporarily fixes the first guide tool 2 and the facing portion 31 is removed, and then these guide tools are removed in the order of the first guide tool 2 and the second guide tool 3. To do. The second guide tool 3 can be easily removed from the joint portion 52 of the second steel sheet pile 42 along the wall crossing direction Y by providing, for example, the removing portion 32a. Since the removed fitting jig 1 can be mounted on the upper end portion of the arm portion 63 adjacent to the joint portion 52 on the non-fitting side of the second steel sheet pile 42, for example, the mounting step described above can be performed. It can be repeated with the same fitting jig 1.

As described above, the method of fitting the steel sheet pile in the present embodiment is completed. The continuous wall 9 can be formed by repeating the method of fitting the steel sheet piles described above.

<First modification of fitting jig 1>
Next, a first modification of the fitting jig 1 in this embodiment will be described with reference to FIG. 7. The difference between the fitting jig 1 described above and the first modification is that the first guide tool 2 has a portion that expands from the lower side to the upper side in the height direction Z. The description of the same configuration as that of the fitting jig 1 described above will be omitted.

In the first modification, for example, as shown in FIG. 7, at least one of the first plate member 21, the second plate member 22, and the third plate member 23 is inclined with respect to the height direction Z. The inclined plate members 21, 22, and 23 are inclined from the inside to the outside of the first guide tool 2 from the lower side to the upper side in the height direction Z.

When the second plate member 22 is inclined, the width of the first plate member 21 and the third plate member 23 in the wall crossing direction Y has a portion that increases from the lower end to the upper end. At this time, after the second steel sheet pile 42 is guided into the fitting jig 1, for example, the second steel sheet pile 42 is brought into contact with the inclined guide surface 22aa and lowered to face the introduction surface 22ab. The second steel sheet pile 42 can be easily introduced between the sheet and the sheet sheet 31. This makes it possible to increase the inducibility of the second steel sheet pile 42. In addition, "the second plate member 22 is inclined" means that the second plate member 22 is provided inclined with respect to the plane including the wall extension direction X and the height direction Z.

Further, when the first plate member 21 or the third plate member 23 is inclined, the width of the wall extending direction X on the guide surface 22aa increases from the lower end to the upper end, for example, as shown in FIG. 7B. Therefore, the range in which the second steel sheet pile 42 can be guided into the fitting jig 1 can be easily expanded. In addition, "the first plate member 21 or the third plate member 23 is inclined" means that the first plate member 21 or the third plate member 23 is inclined with respect to the plane including the wall crossing direction Y and the height direction Z. Indicates that it is provided.

As the second plate member 22 and the third plate member 23, for example, different members may be used for the inclined portion and the non-inclined portion. In this case, the members of the inclined portion and the members of the non-inclined portion are joined as the plate members 22 and 23 by welding or the like.

<Second modification of fitting jig 1>
Next, a second modification of the fitting jig 1 in this embodiment will be described with reference to FIGS. 8A to 8C. The difference between the fitting jig 1 described above and the second modification is that the second guide 3 has the second connecting member 35. The description of the same configuration as that of the fitting jig 1 described above will be omitted.

In the second modification, for example, as shown in FIGS. 8A to 8C, the second connecting member 35 is arranged so as to extend from the facing portion 31 along the side surface of the first steel sheet pile 41. The second connecting member 35 is, for example, as shown in FIG. 8C, the first side surface 41a of the first steel sheet pile 41 on which the first connecting member 33 is arranged (one side surface of the arm portion 63 of the first steel sheet pile 41). Extends along a second side surface 41b facing the In this case, the facing portion 31 is sandwiched between the first connecting member 33 and the second connecting member 35. Therefore, before the fitting jig 1 is temporarily fixed on the joint portion 51 of the first steel sheet pile 41, it is possible to prevent the fitting jig 1 from tipping over in the wall crossing direction Y due to strong wind or the like. The fitting jig 1 can be stably made to stand on the first steel sheet pile 41. As a result, the fitting jig 1 can be easily mounted, and for example, even one worker can perform the mounting work.

As the second connecting member 35, for example, the same material as the first connecting member 33, specifically, a rod-shaped member such as round steel or deformed reinforcing bar may be used. The thickness of the second connecting member 35 is about the same as the thickness of the first connecting member 33, and may be thinner than the thickness of the first connecting member 33, for example. Along the height direction Z, the height of the second connecting member 35 may be about the same as the height of the first connecting member 33, or may be lower than the height of the first connecting member 33.

<Third modification example of fitting jig 1>
Next, a third modification of the fitting jig 1 in this embodiment will be described with reference to FIGS. 9A and 9B. The difference between the fitting jig 1 described above and the third modification is that the height H1b of the introduction surface 22ab is lower than the height H2 of the facing portion 31. The description of the same configuration as that of the fitting jig 1 described above will be omitted.

In the third modification, for example, as shown in FIG. 9A, the facing portion 31 extends below the introduction surface 22ab in the height direction Z. The lower end of the introduction surface 22ab is provided at a position higher than the lower end of the facing portion 31, and for example, a space indicated by an arrow in FIG. 9B is formed. In this case, when the fitting jig 1 is viewed from the side of the first guide tool 2 in the wall crossing direction Y (direction of the arrow in FIG. 9A), the extending surface S1 of the facing portion 31 can be visually observed. Therefore, when lowering the second steel sheet pile 42 guided into the fitting jig 1, the position of the joint portion 52 of the second steel sheet pile 42 can be visually observed from the lower side of the introduction surface 22ab. That is, since the fitting state when the second steel sheet pile 42 is fitted to the first steel sheet pile 41 can be visually confirmed, the position adjustment when fitting the joint portions 51 and 52 is easily performed. It is possible to perform the fitting operation more accurately. The positions of the lower ends of the third plate member 23 and the fourth plate member 24 may be equal to the positions of the lower ends of the introduction surface 22ab as in the illustrated example, and in other examples, the positions of the lower ends of the facing portion 31. It may be equal to the position.

<Fourth modification of fitting jig 1>
Next, a fourth modification of the fitting jig 1 in this embodiment will be described with reference to FIGS. 10A to 10C. The difference between the fitting jig 1 described above and the fourth modification is that the insertion portion 11 is further provided. The description of the same configuration as that of the fitting jig 1 described above will be omitted.

In the fourth modification, for example, as shown in FIGS. 10A and 10B, the insertion portion 11 is provided in the first guide tool 2. The insertion portion 11 is, for example, a through hole penetrating the surface of the first plate member 21. The insertion portion 11 may be provided in, for example, the second guide tool 3.

Further, the insertion portion 11 may be a member having a hole mounted on the facing portion 31 of the second guide tool 3, as shown in FIG. 10C, for example, and the member is attached to the first guide tool 2. It may be provided. The number, positions, and shapes of the insertion portions 11 are arbitrary.

The insertion portion 11 is used to insert the cord-shaped member 27 connected to the second steel sheet pile 42 fitted to the first steel sheet pile 41. The cord-shaped member 27 is connected, for example, near the lower end of the joint portion 52 of the second steel sheet pile 42. As the cord-like member 27, for example, a wire, a rope, a chain, or the like is used. The cord-like member 27 connected to the second steel sheet pile 42 can be towed through the insertion portion 11, and the guidance of the second steel sheet pile 42 and the like can be easily realized.

Further, the cord-like member 27 may be pulled by using a device such as a winch to guide the second steel sheet pile 42. By using a winch, the workload is greatly reduced when the weight of the steel sheet pile 4 becomes heavier due to the increase in size and length, or when it is difficult to stop the steel sheet pile 4 in an environment such as a strong wind. It becomes possible to do. As a position for installing the winch, for example, a position near the first steel sheet pile 41 where a reaction force can be taken from the ground 8 is preferable. In addition to the above, for example, a fixing plate may be installed on the upper part of the first steel sheet pile 41, and a winch may be installed on the fixing plate. In this case, a small portable winch is used and the reaction force is the first. The winch may be temporarily fixed to the fixing plate in a detachable state by using bolts or the like so that it can be removed by the steel sheet pile 41. Further, the method of guiding the steel sheet pile 4 suspended by a crane or the like to a predetermined position by using a device such as a winch is also applied to the press-fitting method in which the construction machine is placed on the first steel sheet pile 41. it can. At this time, as the installation position of the device such as the winch, the reaction force is taken by directly attaching it to the press-fitting construction machine.

<Fifth modification example of fitting jig 1>
Next, a fifth modification of the fitting jig 1 in this embodiment will be described with reference to FIGS. 11A and 11B. The difference between the fitting jig 1 described above and the fifth modification is that the first guide 2 has a connecting plate member 25. The description of the same configuration as that of the fitting jig 1 described above will be omitted.

In the fifth modification, for example, as shown in FIG. 11A, the connecting plate member 25 is sandwiched between the connecting surface 24a of the fourth plate member 24 and the facing portion 31, and is in contact with the connecting surface 24a and the facing portion 31. .. That is, the second guide tool 3 is connected to the first guide tool 2 via the connection surface 24a and the connection plate member 25.

The connecting plate member 25 is joined to the facing portion 31 by welding or the like, and is temporarily fixed to the facing portion 31 by a temporary fixing member such as a tightening metal fitting (for example, a C-type clamp) or a magnet, or spot welding. It may be connected in the state. By providing the connecting plate member 25, the area for attaching the temporary fixing member or performing spot welding is increased, and the connection between the first guide tool 2 and the second guide tool 3 can be easily realized.

Further, for example, as shown in FIGS. 12A to 12D, a shaft member 36 such as a bolt may be used as the temporary fixing member. The shaft member 36 is provided so as to penetrate the facing portion 31 and the connecting plate member 25. As shown in FIG. 12B, a through hole 251 is formed in the connecting plate member 25. In this case, while maintaining the connection between the first guide tool 2 and the second guide tool 3, the first guide tool 2 can rotate relative to the second guide tool around the shaft member 36 (). (Arrow in FIG. 12A). Therefore, it becomes easy to carry the fitting jig 1 and adjust the angle of the first guide tool 2.

Further, as shown in FIGS. 12C and 12D, after fitting the second steel sheet pile 42 to the first steel sheet pile 41 using the fitting jig 1, the first induction is performed with the shaft member 36 as an axis. By turning the tool 2 by, for example, 90 ° or more, the first guide tool 2 can be easily removed from the joint portion 52 of the second steel sheet pile 42. In order to make the turning operation of the first guide tool 2 easier, the first guide tool 2 may be separated from the second guide tool 3 in advance along the axial direction of the shaft member 36. The removal process of the fitting jig 1 can be performed while maintaining the connection between the first guide tool 2 and the second guide tool 3, and workability is achieved by simplifying the removal process and integrating the fitting jig 1. Can be improved.

<Sixth modification of fitting jig 1>
Next, a sixth modification of the fitting jig 1 in this embodiment will be described with reference to FIGS. 13A and 13B. The difference between the fitting jig 1 described above and the sixth modification is that the cross-sectional shape of the protruding portion 32 of the second guide tool 3 is similar to that of the joint portion 5, but is not the same. The description of the same configuration as that of the fitting jig 1 described above will be omitted.

In the sixth modification, for example, as shown in FIGS. 13A and 13B, the facing portion 31 is formed of three plate members, and a protruding portion 32 formed of the plate members is provided at the tip of the facing portion 31. .. Even in this case, the facing portion 31 has a recess 31b. The facing portion 31 may not have, for example, a recess 31b, and may have a plate shape extending in the wall extension direction X. As the facing portion 31, for example, the same material as that of the first connecting member 33 is used.

The facing portion 31 has a shape similar to that of the joint portion 51 of the first steel sheet pile 41. Also in this case, similarly to the fitting jig 1 described above, when the joint portion 52 moves to the outside of the fitting jig 1 due to, for example, a strong wind, the protruding portion 32 or the third plate member with respect to the joint portion 52. 23 comes into contact. Therefore, when the joint portion 52 is fitted to the joint portion 51 of the first steel sheet pile 41, the fitting jig 1 can be used to prevent the joint portion 52 from coming off in the wall extension direction X. The "shape similar to the joint portion 51" may be any shape that can prevent the joint portion 52 from coming off and secure a space for fitting the joint portions 51 and 52.

<7th modification of fitting jig 1>
Next, a seventh modification of the fitting jig 1 in this embodiment will be described with reference to FIGS. 14 and 15. The difference between the fitting jig 1 described above and the seventh modification is that the first guide tool 2 does not have the third plate member 23 and the fourth plate member 24. The description of the same configuration as that of the fitting jig 1 described above will be omitted.

In the seventh modification, for example, as shown in FIG. 14, the first guide tool 2 is formed in an L shape when viewed from the height direction Z. Also in this case, the first surface 21a formed by the first plate member 21 intersects the wall extension direction X of the continuous wall and is directed to the introduction direction of the second steel sheet pile 42. Further, the second surface 22a formed by the second plate member 22 intersects the wall crossing direction Y of the continuous wall. The contact portion 31a of the facing portion 31 is in contact with the first plate member 21.

Further, for example, as shown in FIG. 15, the first guide tool 2 may be formed in a curved shape when viewed from the height direction Z. In this case, only the curved first plate member 21 is provided, and the first plate member 21 forms both the first surface 21a and the second surface 22a. Also in this case, the first surface 21a intersects the wall extension direction X of the continuous wall and is directed to the introduction direction of the second steel sheet pile 42. Further, the second surface 22a intersects the continuous wall in the wall crossing direction Y. The contact portion 31a of the facing portion 31 is in contact with the first plate member 21.

As described above, even when the first inducer 2 is formed in an L shape or a curved shape, the joint portion 52 is formed in the fitting jig 1 by, for example, strong wind, as in the fitting jig 1 described above. When it moves to the outside of, the protruding portion 32 comes into contact with the joint portion 52. Therefore, when the joint portion 52 is fitted to the joint portion 51 of the first steel sheet pile 41, the fitting jig 1 can be used to prevent the joint portion 52 from coming off in the wall extension direction X.

The fitting jig 1 may include, for example, a configuration in which each of the above-described modifications is combined. As an example, as shown in FIGS. 16A to 16C, for example, the fitting jig 1 has a portion in which the first guide tool 2 expands from the lower side to the upper side in the height direction Z, and is connected to the fitting jig 1. A second guide tool 2 having a first guide tool 2 having a plate member 25 and a second connecting member 35, the height H1b of the introduction surface 22ab is lower than the height H2 of the facing portion 31, and the insertion portion 11 is further provided. The configuration may be a combination with 3.

Further, in the fitting jig 1 in the present embodiment, as shown in FIGS. 17A to 21B, for example, even when a Z-shaped steel sheet pile or a U-shaped steel sheet pile is used as the steel sheet pile 4, the same applies to the above. It can be used, and it is possible to realize the formation of the continuous wall 9 by the steel sheet pile 4 provided with the fitting jig 1, the steel sheet pile fitting method using the fitting jig 1, and the steel sheet pile fitting method. ..

Here, for example, as shown in FIGS. 22A and 22B, the Z-shaped steel sheet pile or the hat-shaped steel sheet pile may have a male joint portion 5f and a female joint portion 5s as a pair of joint portions 5. .. In this case, the pair of steel sheet piles 4 are connected by fitting the male joint portion 5f of one steel sheet pile 4 and the female joint portion 5s of the other steel sheet pile 4.

As shown in FIG. 22A, for example, the male joint portion 5f has a protrusion 5t formed on the arm portion 63 side of the fitting groove 5b. The protrusion 5t is formed by branching from the arm portion 63 with the fitting claw 5a, and extends in the same direction as the fitting claw 5a. The fitting groove 5b is formed between the protrusion 5t and the fitting claw 5a.

As shown in FIG. 22B, for example, the female joint portion 5s has a bent portion 5n formed on the arm portion 63 side of the fitting groove 5b. The bent portion 5n is formed between the arm portion 63 and the fitting claw 5a, and extends in the same direction as the fitting claw 5a. The fitting groove 5b is formed between the bent portion 5n and the fitting claw 5a. The fitting claw 5a is formed integrally with the arm portion 63 via the bent portion 5n.

When a continuous wall 9 is formed by using a Z-shaped steel sheet pile having a male joint portion 5f and a female joint portion 5s as the steel sheet pile 4, FIGS. 17A and 17B show the order in which the pair of steel sheet piles 4 are fitted. Either the first order shown in FIG. 18A or the second order shown in FIGS. 18A and 18B is used.

In the first order, for example, as shown in FIGS. 17A and 17B, the male joint portion 52f of the second steel sheet pile 42 is fitted to the female joint portion 51s of the first steel sheet pile 41. In this case, each steel sheet pile 4 is connected along the direction of the arrow shown in FIG. 17A.

In the second order, for example, as shown in FIGS. 18A and 18B, the female side joint portion 52s of the second steel sheet pile 42 is fitted to the male side joint portion 51f of the first steel sheet pile 41. In this case, each steel sheet pile 4 is connected along the direction of the arrow shown in FIG. 18A.

Further, when the continuous wall 9 is formed by using the hat-shaped steel sheet pile having the male joint portion 5f and the female joint portion 5s as the steel sheet pile 4, the order in which the pair of steel sheet piles 4 are fitted is shown in FIGS. 19A and 19A. Either the first order shown in FIG. 19B or the second order shown in FIGS. 20A and 20B is used. The details of each order are the same as those described above with reference to FIGS. 17A to 18B, and thus the description thereof will be omitted.

As described above, even when the fitting jig 1 in the present embodiment uses a Z-shaped steel sheet pile having a male joint portion 5f and a female joint portion 5s or a hat-shaped steel sheet pile as the steel sheet pile 4. , The steel sheet pile 4 provided with the fitting jig 1, the steel sheet pile fitting method using the fitting jig 1, and the continuous wall 9 can be formed by the steel sheet pile fitting method. can do.

23A and 23B are views showing another example of the fitting jig according to the embodiment of the present invention. In the illustrated example, the fitting jig 101 mounted on the joint portion 5 of the steel sheet pile 4 intersects in the wall extension direction of the continuous wall, and in the introduction direction of another steel sheet pile connected to the steel sheet pile 4. The first surface 121a to be directed intersects with the guide surface 122aa intersecting the wall crossing direction of the continuous wall and adjacent to the first surface 121a, and also intersects the wall crossing direction of the continuous wall and is located below the guidance surface 122aa in the height direction. The introduction surface 122ab, the facing portions 131a and 131b extending in the wall extension direction of the continuous wall and facing the introduction surface 122ab, and the protruding portion 132 protruding from the facing portion 131b on the tip side toward the introduction surface 122ab. And a first connecting member 133 which is joined to the facing portion 131a on the base end side and is arranged so as to extend along the side surface of the steel sheet pile 4.

Further, the fitting jig 101 has an insertion portion 111 through which a cord-like member can be inserted. The introduction surface 122ab is formed by a plate member 135 connected to the facing portion 131a via a swivel arm 134 and a shaft member 136 such as a bolt. By swiveling the swivel arm 134 and the plate member 135 around the shaft member 136, the introduction surface 122ab is no longer facing the facing portion 131b and the protruding portion 132, and another steel sheet pile is attached to the fitting jig 101 from above. The fitting jig 101 can be removed even when the joint portion is inserted and fitted to the joint portion 5 of the steel sheet pile 4.

According to an exemplary embodiment of the present invention as described above, the first inducer 2 has a first surface 21a and a second surface 22a including an introduction surface 22ab and an induction surface 22aa. Further, the second guide tool 3 has a facing portion 31 and a protruding portion 32. Therefore, the second steel sheet pile 42 can be easily guided into the fitting jig 1 by the first surface 21a and the guide surface 22aa. Further, when the second steel sheet pile 42 is lowered, the introduction surface 22ab, the facing portion 31, and the protruding portion 32 can prevent the joint portion 52 from coming off from the fitting jig 1. This makes it possible to facilitate the fitting work of the steel sheet pile 4. Further, as the fitting work is facilitated, the position of the second steel sheet pile 42 for the purpose of ensuring verticality and adjusting the fitting angle is also facilitated, and improvement in construction accuracy can be expected.

In addition to the above, even when the weight of one steel sheet pile 4 increases due to the increase in size and length of the steel sheet pile 4, the fitting work of the joint portion 5 can be facilitated and the construction speed can be improved. it can.

Further, according to some embodiments, the facing portion 31 has a recess 31b. Therefore, the second steel sheet pile 42 can be lowered while the lower end of the joint portion 52 of the second steel sheet pile 42 is arranged in the recess 31b. As a result, when the second steel sheet pile 42 is lowered, it is possible to easily prevent the joint portion 52 from coming off from the fitting jig 1.

Further, according to some embodiments, at least one of the first shortest distance D21 and the second shortest distance D22 is a second steel sheet pile 42 in a direction orthogonal to the width direction of the second steel sheet pile 42. It is smaller than the maximum length (maximum width D1) of the joint portion 52. Therefore, when lowering the second steel sheet pile 42, the angle between the introduction surface 22ab of the first guide tool 2 and the facing portion 31 of the second guide tool 3 does not depend on the angle of the second steel sheet pile 42. The joint portion 52 can be prevented from coming off and the position can be easily held. This makes it possible to further facilitate the fitting work of the steel sheet pile 4.

In addition to the above, the position adjustment when the joint portion 52 of the second steel sheet pile 42 is fitted to the joint portion 51 of the first steel sheet pile 41 becomes easy. Therefore, it becomes easy to manage the expansion or contraction of the wall extension direction X and the rotation angle of the joint. This makes it possible to improve the construction accuracy.

Further, according to some embodiments, the first guide tool 2 expands from the lower side to the upper side in the height direction Z. Therefore, the range in the first guide tool 2 that can be introduced to lower the second steel sheet pile 42 can be easily expanded. This makes it possible to easily guide the second steel sheet pile 42.

Further, according to some embodiments, the facing portion 31 is sandwiched between the first connecting member 33 and the second connecting member 35. Therefore, the fitting jig 1 can be easily temporarily placed on the joint portion 51 of the first steel sheet pile 41. This makes it possible to facilitate the work of placing the fitting jig 1.

Further, according to some embodiments, the facing portion 31 extends below the introduction surface 22ab in the height direction Z. Therefore, when lowering the second steel sheet pile 42, the position of the lower end of the joint portion 52 of the second steel sheet pile 42 can be visually recognized from the lower side of the introduction surface 22ab. That is, since the fitting state when fitting the second steel sheet pile 42 to the first steel sheet pile 41 can be visually confirmed, the position adjustment when fitting the joint portions 51 and 52 can be performed more easily. This makes it possible to perform the fitting operation more accurately.

Further, according to some embodiments, the fitting jig 1 includes an insertion portion 11 for inserting a cord-like member 27 connected to the second steel sheet pile 42. Therefore, the second steel sheet pile 42 can be guided into the fitting jig 1 by using the cord-shaped member 27, and the opportunity for the worker to directly touch the second steel sheet pile 42 can be reduced. This makes it possible to safely carry out work such as introduction of the second steel sheet pile 42.

Further, according to some embodiments, the first guide tool 2 is connected to the second guide tool 3 in a state of being temporarily fixed to the facing portion 31 by a temporary fixing member or spot welding. Therefore, the first guide tool 2 and the second guide tool 3 can be easily attached and detached, and can be handled as separate members. Alternatively, the first guide tool 2 may be connected so as to be rotatable relative to the second guide tool 3. As a result, the fitting jig 1 can be easily removed after fitting each joint portion, and the work such as placing the second steel sheet pile 42 after fitting can be smoothly performed. It will be possible.

Further, according to the above embodiment, the above-mentioned fitting jig 1 is used as the fitting method for the steel sheet pile. Therefore, when performing the induction process, the descent process, and the fitting process, it is possible to reduce the load on the worker and improve the safety. This makes it possible to facilitate the fitting work of the steel sheet pile 4.

Further, according to some embodiments, in the removal step, the first guide tool 2 and the second guide tool 3 are removed in the order of the first guide tool 2 and the second guide tool 3. Therefore, the fitting jig 1 can be easily removed after the fitting process, and the second steel sheet pile 42 driving process and the like can be smoothly performed without disturbing the fitting jig 1. It becomes possible to do.

In addition to the above, since the fitting jig 1 is easily removable, it does not impose a load on each work, and can be installed at a lower cost than when using, for example, a large guide frame, and the fitting jig 1 can be installed. Since the loading process and the like do not involve crane work, the work can be performed in parallel with other processes requiring crane work. This makes it possible to prevent process delays.

Further, according to the above embodiment, the continuous wall 9 is formed by the above-mentioned method of fitting the steel sheet pile. Therefore, it is possible to realize the formation of the continuous wall 9 in consideration of reducing the load on the worker and improving the safety.

Further, according to the above embodiment, the steel sheet pile 4 includes the above-mentioned fitting jig 1. Therefore, it is possible to realize the fitting work of the steel sheet pile 4 in consideration of reducing the load on the worker and improving the safety.

Further, according to the above-described embodiment, by combining the above-described modified examples, the fitting operation can be performed in a situation where the operator can directly see. Further, since the fitting jig 1 has the guiding performance, the fitting work can be realized only by the sling rod and the body-wound rope without the worker directly touching the steel sheet pile 4. This makes it possible to carry out construction safely.

Although the examples of the embodiments of the present invention have been described in detail above, the above-described embodiments are merely examples of the embodiment of the present invention, and the technical aspects of the present invention are based on these. The scope should not be construed in a limited way.

1: Fitting jig 11: Insertion part 2: First guide tool 21: First plate member 21a: First surface 22: Second plate member 22a: Second surface 22aa: Induction surface 22ab: Introduction surface 23: Third Plate member 24: Fourth plate member 24a: Connection surface 25: Connection plate member 27: Cord-like member 3: Second guide tool 31: Opposing part 31a: Contact part 31b: Recessed part 32: Protruding part 32a: Removing part 33: First connecting member 35: Second connecting member 36: Shaft member 4: Steel sheet pile 41: First steel sheet pile 41a: First side surface 41b: Second side surface 42: Second steel sheet pile 5: Joint portion 5a: Fitting Claw 5b: Fitting groove 5f: Male joint 5n: Bent 5s: Female joint 5t: Protruding 51: Joint 51f: Male joint 51s: Female joint 52: Joint 52f: Male Joint part 52s: Female joint part 61: Web part 62: Flange part 63: Arm part 8: Ground 9: Continuous wall X: Wall extension direction Y: Wall crossing direction Z: Height direction

Claims (12)

A jig for fitting the joint portion of the second steel sheet pile to the joint portion of the first steel sheet pile, which is driven into the ground and forms a part of the continuous wall.
A first surface that intersects the wall extension direction of the continuous wall and is directed in the introduction direction of the second steel sheet pile.
A guide surface that intersects the continuous wall in the crossing direction and is adjacent to the first surface,
An introduction surface that intersects the wall crossing direction and is located below the guide surface in the height direction.
With the facing portion extending in the wall extension direction and facing the introduction surface at a distance,
A protruding portion protruding from the tip end side of the facing portion to the introduction surface side in the wall extension direction,
A fitting jig including a first connecting member that is joined to the base end side of the facing portion in the wall extension direction and is arranged so as to extend along the first side surface of the first steel sheet pile. The fitting jig includes a first guide having the first surface, the guide surface and the introduction surface, and a second guide having the facing portion, the protruding portion and the first connecting member.
According to claim 1, the facing portion includes a contact portion in contact with the first guide tool, and a recess formed between the contact portion and the projecting portion and open to the first guide tool side. The fitting jig described. The first inducer is
The first plate member forming the first surface and
A second plate member that comes into contact with the first plate member at one end in the wall extension direction and forms the guide surface and the introduction surface.
A third plate member which is in contact with the other end of the second plate member in the wall extension direction and forms a surface facing the first surface is included.
At least one of the first shortest distance between the projecting portion and the second plate member and the second shortest distance between the projecting portion and the third plate member along the wall crossing direction is The fitting jig according to claim 2, wherein the fitting jig is smaller than the maximum length of the joint portion of the second steel sheet pile in a direction orthogonal to the width direction of the second steel sheet pile. At least one of the first plate member, the second plate member, and the third plate member is inclined with respect to the height direction.
The fitting jig according to claim 3, wherein the first guide tool expands from the lower side to the upper side in the height direction as a whole. The first invention is according to any one of claims 2 to 4, wherein the first guide is connected to the second guide in a state of being temporarily fixed to the facing portion by a temporary fixing member or spot welding. Fitting jig. The fitting jig according to any one of claims 2 to 4, wherein the first guide is connected so as to be rotatable relative to the second guide. Further comprising a second connecting member arranged to extend along a second side surface of the first steel sheet pile facing the first side surface.
The fitting jig according to any one of claims 1 to 6, wherein the facing portion is sandwiched between the first connecting member and the second connecting member. The fitting jig according to any one of claims 1 to 7, wherein the facing portion extends below the introduction surface in the height direction. The fitting jig according to any one of claims 1 to 8, further comprising an insertion portion for inserting a cord-like member connected to the second steel sheet pile. A method of fitting the joint portion of the second steel sheet pile to the joint portion of the first steel sheet pile by using the fitting jig according to any one of claims 1 to 9. There,
A mounting step of mounting the fitting jig on the upper end of an arm portion adjacent to the joint portion of the first steel sheet pile, and
The lower end of the joint portion of the second steel sheet pile is guided in a suspended state at a position that overlaps the first surface when viewed from the wall extension direction and overlaps with the guide surface when viewed from the wall crossing direction. Induction process and
A lowering step of lowering the lower end of the joint portion of the second steel sheet pile along the guide surface and the introduction surface at a position between the introduction surface and the facing portion.
Includes a fitting step of fitting the joint portion of the second steel sheet pile to the joint portion of the first steel sheet pile provided below the facing portion along the height direction. , How to fit steel sheet piles. The fitting jig includes a first guide having the first surface, the guide surface and the introduction surface, and a second guide having the facing portion, the protruding portion and the first connecting member.
After the fitting step, the temporary fixing member or spot welding for temporarily fixing the first guide tool and the facing portion is removed, and then the first guide tool and the second guide tool are attached to the first guide. The method for fitting a steel sheet pile according to claim 10, further comprising a removing step of removing the tool and the second guide tool in this order. A steel sheet pile with a fitting jig in which the fitting jig according to any one of claims 1 to 9 is placed on the upper end portion of a portion adjacent to the joint portion.

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