JP7360867B2 - How to connect liner plates, fastening metal fittings - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for connecting liner plates that have flanges with holes at the upper and lower ends as well as both side ends, and a fastening fitting for connecting the liner plates.

Traditionally, when building bridge piers, abutments, tower foundations, landslide prevention piles, water collection wells, shafts for propulsion methods, etc. in mountainous areas or locations where heavy machinery cannot be used due to construction conditions, it is lightweight and can be transported by hand. Liner plates have been used. A liner plate is a structural member made of a thin steel plate that is corrugated and has flanges on its four sides.In addition to being lightweight, it also has the advantage of being easy to construct because it can be assembled from the inside.

To assemble the liner plates, adjacent liner plates are set so that the bolt holes of the axial flanges are aligned, bolts are inserted into the bolt holes of the axial flanges, and nuts are tightened to form a ring. Next, adjacent liner plates are set with the bolt holes of the circumferential flanges aligned, and each ring is connected in the axial direction with bolts and nuts, creating a space in the ground.

By the way, since a plurality of bolt holes are formed in the axial flange and the circumferential flange, if all these bolt holes are fastened with nuts, it will take a considerable amount of time to assemble the liner plate. Therefore, techniques disclosed in patent documents have been proposed for the purpose of easily connecting liner plates to each other.

The liner plate fastening fitting disclosed in the patent document has the circumferential flanges of the upper and lower liner plates abutted against each other, an insertion part inserted into a hole formed in the flange, and two flanges brought into contact with each other. It consists of a holding part that holds the By connecting the liner plates using such fastening fittings, it is possible to shorten the time required for the complicated bolt tightening work while supporting the liner plate while doing the work half-heartedly.

In this way, the liner plate fastening fitting disclosed in the patent document fixes the two flanges with the clamping part by inserting the insertion part into the hole formed in the flange and rotating the insertion part. It was something.

Utility Model Publication No. 3-69093

However, with the conventional liner plate connection method, if uneven earth pressure due to earthquakes or uneven pressure during injection of backfill material acts on the ring assembled with liner plates, the circumferential flanges of the upper and lower liner plates At this time, a shear force is applied between the two flanges, causing a shift between the two flanges, and the entire fitting rotates in the opposite direction to the fastening direction around the insertion part inserted into the hole in the flange, causing the two flanges to separate. There was a possibility that the clamping part that pinches the flange could come off from the flange.

In addition, since the insertion part is simply inserted into the hole of the flange, the insertion part could easily come out of the hole, and the metal fitting could completely come off the flange, which could lead to a serious accident. In addition, the fastening force applied between the two flanges is only pressed by the clamping part, which causes a problem that the fastening force is weaker than that of a bolt-and-nut joint, and the amount of deformation of the entire ring becomes large.

Furthermore, since the structure is fastened by inserting an insertion part into the hole of the flange and rotating it around this insertion part, if this structure is applied to the connection of the axial flanges of liner plates, it will be difficult to apply corrugated processing. There was a problem that it interfered with the steel plate and could not be applied to that part.

Therefore, the present invention was devised in view of the above-mentioned problems, and its purpose is to prevent the flanges from shifting from each other even when a shear force or the like is applied between the flanges of connected liner plates. It is an object of the present invention to provide a method for connecting liner plates and a fastening fitting that do not cause the occurrence of such problems.

In order to solve the above-mentioned problems, the present inventors installed temporary fixing members in some of the holes formed in the flange of one liner plate and the flange of the other liner plate. By inserting the flanges, the flanges are temporarily secured together, the positions of the multiple holes drilled in the flanges are aligned using the temporary securing member, the shape of the shaft formed by the temporarily secured flanges is adjusted, and the holes are drilled in the flanges. We have invented a method for connecting liner plates in which flanges are permanently tightened using holes in which no temporary fixing members are inserted among the plurality of holes provided.

A method for connecting liner plates according to a first aspect of the present invention is a method for connecting liner plates having flanges with a plurality of holes at the upper and lower ends as well as at both ends, the method comprising: The flanges are temporarily fixed by inserting a temporary fixing member into some of the holes drilled in the flange of the liner plate and the flange of the other liner plate, and the flanges are temporarily fixed with the temporary fixing member. Align the positions of the plurality of holes drilled in each of the holes, adjust the shape of the shaft formed by the temporarily fixed flanges, and adjust the shape of the shaft formed by the temporarily fixed flanges, and The flanges are fully tightened using the holes in which no members are inserted, and when the flanges are fully tightened, the holes in which the temporary fixing members are not inserted are inserted from the radially inner side of the flange to the radially outer side. an insertion part that applies a fastening force between the flanges through the plurality of holes, a grip part that grips the inner ends of the flanges in a radial direction, and a position between the insertion part and the grip part. The liner plates are connected to each other by inserting a fastening fitting formed by bending a single metal plate-like member into the intermediate portion and bringing the flanges close to each other.

A method for connecting liner plates according to a second aspect of the present invention is characterized in that, in the first aspect, before the flanges are finally tightened together, the flanges that have been temporarily fixed by the temporary fixing member are drawn together and temporarily tightened.

A method for connecting liner plates according to a third aspect of the present invention, in the first or second aspect, includes inserting the fastening fittings into some of the plurality of holes drilled in the flange, and inserting the fastening fittings into some of the holes formed in the flange. The liner plates are connected to each other by inserting bolts into the liner plates.

A method for connecting liner plates according to a fourth aspect of the present invention is a method for connecting liner plates having flanges with a plurality of holes at the upper and lower ends as well as at both side ends, the method comprising: The flanges are temporarily fixed by inserting a temporary fixing member into some of the holes drilled in the flange of the liner plate and the flange of the other liner plate, and the flanges are temporarily fixed with the temporary fixing member. Align the positions of the plurality of holes drilled in each of the holes, adjust the shape of the shaft formed by the temporarily fixed flanges, and adjust the shape of the shaft formed by the temporarily fixed flanges, and The flanges are fully tightened using the holes in which no members are inserted, and when the flanges are fully tightened, the holes in which the temporary fixing members are not inserted are inserted from the radially inner side of the flange to the radially outer side. an insertion part that applies a fastening force between the flanges through the plurality of holes, a grip part that grips the inner ends of the flanges in a radial direction, and a position between the insertion part and the grip part. At the same time, the liner plates are connected to each other by inserting a fastening fitting having an intermediate portion having a protrusion that can be locked into a hole drilled in the flange and bringing the flanges close to each other. do.

A fastening fitting according to a fifth aspect of the present invention is a fastening fitting for gripping the flanges of the liner plates when connecting the liner plates having flanges with a plurality of holes at the upper and lower ends and both side ends. an insert portion that applies a fastening force between the flanges through the plurality of holes; a grip portion that grips the inner ends of the flanges in the radial direction; and a portion between the insert portion and the grip portion. The intermediate portion is formed by bending a single metal plate-like member.

A fastening fitting according to a sixth aspect of the present invention is a fastening fitting for gripping the flanges of the liner plates when connecting the liner plates having flanges with a plurality of holes at the upper and lower ends and both side ends. an insert portion that applies a fastening force between the flanges through the plurality of holes; a grip portion that grips the inner ends of the flanges in the radial direction; and a portion between the insert portion and the grip portion. and an intermediate portion having a protrusion that can be positioned and engaged with a hole drilled in the flange.

In the fastening fitting according to a seventh aspect of the present invention, in the fifth or sixth aspect, the insertion part is formed in a substantially U-shaped cross section so as to sandwich the adjacent flanges through a hole drilled in the flange. It is characterized by

In the fastening fitting according to an eighth aspect of the present invention, in any one of the fifth to seventh aspects, the gripping portion is formed to have a substantially U-shaped cross section that clamps the inner ends of the adjacent flanges in the radial direction. It is characterized by

According to the present invention configured as described above, the flange is fixed by inserting the temporary fixing member into some of the holes formed in the flange of one liner plate and the flange of the other liner plate. Temporarily fasten them together. Since the flanges are thereby temporarily fixed to each other, movement of the flanges to each other is suppressed, and final tightening can be easily started. By aligning the multiple holes drilled in each flange with the temporary fixing member and adjusting the shape of the shaft formed by the temporarily attached flanges, it becomes easy to align adjacent liner plates with each other. A shaft with a desired shape can be obtained. Furthermore, by fully tightening the flanges using holes in which no temporary fixing members have been inserted among the multiple holes drilled in the flanges, stronger fastening force is applied between the flanges, and Even if shearing force or separation force occurs, displacement or opening between the two flanges can be prevented.

In addition, the fastening fittings for gripping the flanges of the liner plate include an insertion part that applies fastening force between the flanges through a plurality of holes, a grip part that grips the inner ends of the flanges in the radial direction, and an insertion part that grips the inner ends of the flanges in the radial direction. and an intermediate portion located between the grip portion and the grip portion. In other words, since the flanges are fastened together at two points, even if shearing force or separation force is applied between the flanges, the amount of deformation of the entire ring formed by combining the liner plates can be reduced, which increases the safety of the entire ring. can improve sex.

FIG. 2 is a perspective view showing a wall constructed using the liner plate connection method to which the present invention is applied. (a) is a perspective view showing a liner plate used in the liner plate connection method, and (b) is a plan view thereof. (a) is a perspective view showing a first modification of the liner plate used in the liner plate connection method, and (b) is a plan view thereof. (a) is a perspective view showing a second modification of the liner plate used in the liner plate connection method, and (b) is a plan view thereof. (a) is a side view showing a temporary fastener having a movable part used in a method for connecting liner plates, and (b) is a plan view thereof. (a) is a perspective view of the fastening metal fitting, (b) is its plan view, and (c) is its side view. It is a figure which shows the relationship between a fastening metal fitting and a hole. (a) is a perspective view of a protrusion formed on a fastening metal fitting, (b) is a plan view thereof, and (c) is a diagram showing a first modification of the protrusion. (a) is a perspective view of a fastening fitting in which a slit is formed, (b) is a plan view thereof, and (c) is a side view thereof. (a) is a perspective view showing a first modification of the fastening fitting, (b) is a plan view thereof, and (c) is a side view thereof. (a) is a perspective view showing a second modification of the fastening fitting, and (b) is a side view thereof. (a) is a perspective view showing a third modification of the fastening fitting, and (b) is a side view thereof. FIG. 6 is a front view showing a state in which each liner plate is held in position with a temporary fastener in the liner plate connection method. (a) is a diagram before the fastener is inserted into the hole, (b) is a diagram showing the process of inserting the fastener into the hole, and (c) is a diagram showing the process in which the fastener is inserted into the hole. FIG. (a) is a diagram before the fastening metal fitting according to the first modification is inserted into the hole, (b) is a diagram showing the process of inserting the fastening metal fitting into the hole, and (c) is a diagram showing the process of inserting the fastening metal fitting into the hole. It is a figure which shows the state in which the fastening metal fitting was inserted into the hole. FIG. 7 is a front view showing a state in which the flanges of the liner plate are connected to each other with the temporary fastener removed in the liner plate connection method. FIG. 6 is a front view showing a state in which the flanges of the liner plate are connected to each other by inserting fasteners and bolts into the holes in the liner plate connection method. 17 is a schematic cross-sectional view taken along line 16A-16A in FIG. 16. FIG. FIG. 6 is a diagram showing a state when a lateral shear force is applied between the circumferential flanges of the liner plate.

EMBODIMENT OF THE INVENTION Hereinafter, the form for carrying out the connecting method of liner plates to which this invention is applied will be described in detail with reference to drawings.

FIG. 1 is a diagram showing a wall 1 constructed by the liner plate connection method.

By connecting a plurality of liner plates 20 in the vertical direction and the circumferential direction, the cylindrical wall body 1 and the shaft 100 inside thereof are constructed. The liner plate connection method is a liner plate connection method for connecting the liner plates 20 to each other in the vertical direction and the circumferential direction. The wall 1 is provided in a hole formed underground or above the ground, and is used as earth retaining when constructing a deep foundation pile, a water collection well, an underwater temporary cofferdam, a bridge pier, etc.

The liner plate 20 is made of metal, for example, and has a corrugated steel plate 21 formed in a vertically corrugated shape as shown in FIG. 2, and flanges at the upper end, lower end, and both side ends of the corrugated steel plate 21, respectively. In the liner plate 20, flanges at the upper and lower ends of the corrugated steel plate 21 are circumferential flanges 22, and flanges at both ends of the corrugated steel plate 21 are axial flanges 23.

The circumferential flange 22 is provided with a plurality of holes 22a having a diameter d1 (for example, 21 mm). As shown in FIG. 1, the circumferential flange 22 has a fastening fitting 40 inserted into the hole 22a. The axial flange 23 is made of a rectangular steel plate, and has a plurality of circular axial connecting holes 23a, into which the fastening fittings 40 are inserted.

The liner plate 20 is formed into a fan shape in plan view, as shown in FIGS. 2(a) and 2(b). At this time, the circumferential flange 22 is made of a steel plate having a predetermined thickness and having a fan shape in plan view.

The circumferential flange 22 has a central axis W in the width direction (radial direction) extending in an arc shape, and for example, a plurality of holes 22a are bored on the central axis W or at positions closer to the inner end. will be established.

In the circumferential flange 22, when the center axis M of the hole 22a is the center axis M, and the distance between the center axes M and M of the adjacent holes 22a, 22a is the separation distance P1, the separation distances P1 are approximately equal to each other. That is, the plurality of holes 22a are arranged at equal intervals on the circumferential flange 22.

The liner plate 20 may be formed into a rectangular shape in plan view, as shown in FIGS. 3(a) and 3(b). At this time, the circumferential flange 22 is made of a steel plate having a predetermined thickness and a rectangular shape in plan view. In the circumferential flange 22, the central axis W in the width direction extends linearly, and a plurality of holes 22a are arranged at equal intervals on the central axis W or at positions closer to the inner end.

As shown in FIGS. 4(a) and 4(b), the liner plate 20 has an L-shape in plan view by connecting liner plates having a rectangular shape in plan view to each other via a connecting member 29 such as angle iron. It may be formed into a shape. At this time, in the circumferential flange 22, the center axis W in the width direction extends linearly, and a plurality of holes 22a are arranged at equal intervals on each center axis W or at positions closer to the inner end side. .

In the wall body 1, an annular liner plate connected body 2 is formed by connecting the axial flanges 23, 23 of laterally adjacent liner plates 20, 20 to each other via fastening fittings 40, and the liner plate connection It is constructed by providing multiple stages of bodies 2 in the vertical direction. Note that the wall 1 has two positions: the position of the axial flange 23 of the liner plate 20 in the liner plate connection body 2 provided in the upper stage, and the position of the axial direction flange 23 of the liner plate 20 in the liner plate connection body 2 provided in the lower stage. are arranged and constructed so that they are offset from each other.

Although the wall 1 is shown in FIG. 1 as having a circular shape in plan view, the wall body 1 is not limited to this, and may be formed in an oval shape in plan view, a rectangular shape in plan view, etc. It's okay.

In the liner plate connection method, after the circumferential flanges 22 are temporarily fastened together using a temporary fastener (temporary fastening member) 3, they are finally fastened using a fastening fitting 40. Therefore, first, the temporary fastener 3 will be explained. FIG. 5(a) shows a side view of the temporary fastener 3, and FIG. 5(b) shows a plan view thereof.

As shown in FIG. 5(a), the temporary fastener 3 includes a plate-shaped base 31, an insertion portion 32 extending substantially perpendicularly from the base 31, and a holding mechanism 30 provided on the insertion portion 32. have This holding mechanism 30 has a locking part 33, and the locking part 33 has a movable part 33a. Note that the temporary fastener 3 according to the illustrated embodiment is provided with the holding mechanism 30 in the insertion section 32, but the temporary fastener 3 used in the present invention has a holding mechanism 30 that is held in either or both of the base 31 and the insertion section 32. It is sufficient if the mechanism 30 is provided.

As shown in FIG. 5(b), the base 31 is made of, for example, a metal plate having a circular outer diameter in plan view. The base 31 is formed into an annular shape with a hole 31d formed in the center. Note that the outer shape of the base portion 31 is not limited to a circular shape in a plan view, but may be formed in an angular shape in a plan view.

As shown in FIG. 5A, the insertion portion 32 is made of metal, for example, and is formed into a cylindrical shape with an outer diameter D1 (for example, 16 mm). The insertion portion 32 has an end inserted into the hole 31d of the base 31, and is welded and fixed on the back surface 31b side of the base 31. Although not shown, the hole 31d in the base 31 of the temporary fastener 3 may be omitted, and in this case, the end of the insertion portion 32 may be fixed to the surface 31a of the base 31 by welding or the like. .

The insertion portion 32 is integrally provided with a locking portion 33 that projects laterally on the distal end side. In the insertion portion 32, a metal plate-shaped movable portion 33a is arranged in a slit 32b formed on the side of the distal end side.

The movable part 33a is connected to the insertion part 32 via a shaft 32a arranged on the distal end side of the insertion part 32. The movable part 33a is provided in the insertion part 32 apart from the base part 31. The movable part 33a is protruded laterally from the insertion part 32, and is inclined so that the protrusion length K1 from the insertion part 32 increases from the distal end side of the insertion part 32 toward the base 31 side. It is provided in the section 32. The movable portion 33a can freely protrude from the insertion portion 32 in the direction of arrow Q in the figure with the shaft 32a as the center. In other words, the movable part 33a protrudes from the insertion part 32 when no external force is applied, and part or all of the movable part 33a is housed inside the insertion part 32 when the external force is applied. It can be moved inside the insertion part 32 as shown in FIG.

A fastener 40 used in the liner plate connection method is shown in FIGS. 6(a) to 6(c). 6(a) is a perspective view of the fastening fitting 40, FIG. 6(b) is a plan view thereof, and FIG. 6(c) is a side view thereof.

The fastening fitting 40 is formed, for example, by bending a single metal plate member. The fastening fitting 40 has an insertion part 50, an intermediate part 70 located behind the insertion part 50, and a grip part 60 located behind the intermediate part 70. The fastening fitting 40 is configured to have a size that can be held by an operator with one hand, for example. The fastener 40 may be made of steel or other metal material.

The insertion portion 50 is bent downwardly with respect to the intermediate portion 70 . The insertion part 50 is formed into a substantially flat plate shape, and the front side is formed as a narrow part 51 which is narrower than the middle part 70 side. Specifically, as shown in FIG. 7, the width X1 of the narrow portion 51 is set to be smaller than the width X2 of the insertion portion 50 on the intermediate portion 70 side and smaller than the diameter d1 of the hole 22a. There is. The upper surface of the narrow portion 51 is an inclined surface 51a.

The insertion portion 50 has a protruding portion 52 whose bent end is inclined upward. The protruding part 52 is formed as a part of the narrow part 51 by bending a part of the front side of the insertion part 50. The protrusion 52 is formed into a substantially semicircular arc shape in plan view so that it can be easily inserted into the hole 22a.

The grip portion 60 is formed by folding back a plate-like member to have a substantially U-shaped cross section (C-shape), and is open on the front side. The grip part 60 has an inclined part 61 whose folded end is inclined downward. Note that the cross-sectional shape of the grip portion 60 is not limited to a substantially U-shape, but may be any shape, such as a substantially V-shape in cross section, as long as it can be elastically deformed in the vertical direction.

The intermediate portion 70 is provided between the insertion portion 50 and the grip portion 60 in the fastening fitting 40 . The intermediate portion 70 is formed into a substantially flat plate shape from the insertion portion 50 to the grip portion 60.

As shown in FIG. 6, a U-shaped notch 71 is formed in the intermediate portion 70, and a projection 80 is formed by bending the portion cut out by the notch 71 downward. The protruding portion 80 is integrally formed with the intermediate portion 70.

FIG. 8(a) shows a side view of a protrusion 80 provided on the intermediate portion 70 of the fastening fitting 40, and FIG. 8(b) shows a plan view thereof. The protruding portion 80 is provided so as to protrude downward from the lower surface 70a of the intermediate portion 70 and to be inclined rearward. Note that the dimensions and protruding direction of the protruding portion 80 are not limited to the example shown in FIG. 8, and may be of any configuration as long as it protrudes downward from the intermediate portion 70.

The protrusion 80 is not limited to the configurations shown in FIGS. 8(a) and 8(b), but for example, as shown in FIG. , may be configured to protrude downward from the lower surface 70a of the intermediate portion 70. Further, by forming a convex shape by stamping the plate material, the convex portion may be used as the protrusion 80.

FIG. 9 is a diagram showing an example of forming the protrusion 80b by forming the slit 72. 9(a) is a perspective view of the fastening fitting 40, FIG. 9(b) is a plan view thereof, and FIG. 9(c) is a side view thereof. In addition, in the form shown in FIG. 9, the same components and members as those in the form shown in FIG. 6 are given the same reference numerals, and the description below will be omitted.

As shown in FIG. 9(a), the intermediate portion 70 is formed with a U-shaped slit 72 having a width of, for example, about 3 mm to 1 cm. The protrusion 80b is formed by bending the portion cut out by the slit 72 downward. As shown in FIGS. 9(b) and 9(c), the protruding portion 80b is integrally formed with the intermediate portion 70. As shown in FIG.

In the fastening fitting 40, the insertion portion 50, the gripping portion 60, and the intermediate portion 70 are integrally formed of a single plate-like member, but the present invention is not limited to this, and the insertion portion may be configured as separate members from each other. 50, the grip portion 60 and the intermediate portion 70 may be formed by joining them together by welding or the like.

A first modification of the fastening fitting 40 is shown in FIGS. 10(a) to 10(c). 10(a) is a perspective view of the fastening fitting 40, FIG. 10(b) is a plan view thereof, and FIG. 10(c) is a side view thereof. In addition, in the form shown in FIG. 10, the same components and members as those in the form shown in FIG. 6 are designated by the same reference numerals, and the description below will be omitted.

The fastening fitting 40 according to the first modification may include a second gripping part 90 instead of the insertion part 50. That is, the fastening fitting 40 has the gripping portion 60 on the rear side of the intermediate portion 70 and the second gripping portion 90 on the front side. The second grip portion 90 is formed by folding back a plate-like member to have a substantially U-shaped cross section (C-shape), and is open on the front side.

The second gripping portion 90 has an inclined portion 91 , an arcuate portion 93 adjacent to the inclined portion 91 , and a linear portion 92 adjacent to the arcuate portion 93 . The inclined portion 91 is configured such that the distal end side of the second gripping portion 90 is folded back and inclined downward. The linear portion 92 is configured to protrude forward from the intermediate portion 70 in the fastening fitting 40 . The arcuate portion 93 is formed in a concave shape that is open toward the front.

Next, a second modification of the fastening fitting 40 will be described. 11(a) is a plan view of the plate-like member, FIG. 11(b) is a perspective view of the fastening fitting 40, and FIG. 11(c) is a side view thereof. In addition, in the form shown in FIG. 11, the same components and members as those in the form shown in FIG. 6 are given the same reference numerals, and the description below will be omitted.

In the fastening fitting 40 according to the second modification, two cuts L1 and L2 are formed on the front side of the plate-like member, and by bending the space between the cuts L1 and L2 downward, the second gripping part 90a is formed. is formed. The fastening fitting 40 has a grip portion 60 on the rear side of the intermediate portion 70 and a second grip portion 90a on the front side. The second gripping portion 90a is formed by folding back a plate-like member to have a substantially U-shaped (C-shaped) cross section, and is open on the front side.

The second gripping portion 90a has a sloped portion 91a, an arcuate portion 93a adjacent to the sloped portion 91a, and a linear portion 92a adjacent to the arcuate portion 93a. The inclined portion 91a is configured such that the distal end side of the second gripping portion 90a is folded back and inclined downward. The linear portions 92a are configured to protrude forward from the intermediate portion 70 on both left and right sides of the fastening fitting 40. The arcuate portion 93a is formed in a concave shape that is open to the front side.

Next, a third modification of the fastening fitting will be explained. 12(a) is a plan view of the plate-like member, FIG. 12(b) is a perspective view of the fastening fitting 40, and FIG. 12(c) is a side view thereof. In addition, in the form shown in FIG. 12, the same components and members as those in the form shown in FIG. 6 are given the same reference numerals, and the description below will be omitted.

In the fastening fitting 40 according to the third modification, one notch L3 is formed on the front side of the plate-like member, and by bending one side of this notch L3 downward, the second gripping portion 90b is formed. . The fastening fitting 40 has a grip portion 60 on the rear side of the intermediate portion 70 and a second grip portion 90b on the front side. The second gripping portion 90b is formed by folding back a plate-like member to have a substantially U-shaped (C-shaped) cross section, and is open on the front side.

The second gripping portion 90b has a sloped portion 91b, an arcuate portion 93b adjacent to the sloped portion 91b, and a linear portion 92b adjacent to the arcuate portion 93b. The inclined portion 91b is configured such that the distal end side of the second gripping portion 90b is folded back and inclined downward. The linear portion 92b is configured to protrude forward from the intermediate portion 70 on one side of the fastening fitting 40. The arcuate portion 93b is formed in a concave shape that is open toward the front side.

Next, a method for connecting the liner plates will be explained. In the liner plate connection method, first, as shown in FIG. 13, the axial flanges 23 are connected with each other by the fastening fittings 40, and then the temporary fasteners 3 are attached to the circumferential flanges 22 of the liner plates 20. The circumferential flanges 22 are temporarily fastened together. Specifically, as shown in FIG. 13, the insertion portion 32 of the temporary fastener 3 is inserted into the hole 22a of the circumferential flange 22, and the movable portion 33a of the locking portion 33 protrudes laterally from the insertion portion 32. is configured to contact the hole 22a of the circumferential flange 22. Note that the circumferential flanges 22 can be temporarily fastened to each other by attaching the temporary fastener 3 to the circumferential flanges 22 while the axial flanges 23 are not connected to each other by the fastening fittings 40.

As shown in FIG. 13, by inserting the insertion portion 32 into each of the holes 22a, 22a, the holes 22a, 22a other than the holes 22a, 22a are also aligned. In other words, by inserting the insertion portion 32 into each of the holes 22a, 22a, the central axes M, M in each of the holes 22a, 22a into which the insertion portion 32 is not inserted can be aligned.

After the holes 22a, 22a formed in the circumferential flanges 22 are aligned, the shape of the shaft 100 formed by the temporarily fixed circumferential flanges 22 is adjusted. When connecting the liner plates 20, because the temporary fasteners 3 having small dimensions are used for the holes 22a of the circumferential flanges 22, a shift may occur between the circumferential flanges 22 into which the temporary fasteners 3 are inserted. If a deviation occurs between the circumferential flanges 22, the intended dimensions of the shaft 100 cannot be obtained, so the shape of the shaft 100 is adjusted after the holes 22a, 22a are aligned.

After adjusting the shape of the shaft 100, and before final tightening of the circumferential flanges 22, the circumferential flanges 22 temporarily fixed with the temporary fixing tool 3 are brought close to each other (in the direction of the arrow in FIG. 13) and temporarily tightened. In this way, by temporarily tightening the circumferential flanges 22 together before the final tightening, the final tightening can be easily started with the gap between the circumferential flanges 22 reduced or eliminated.

Next, the circumferential flanges 22 are fully tightened. In the final tightening, the fasteners 40 are inserted into holes 22a in which the temporary fasteners 3 are not inserted among the plurality of holes 22a in the circumferential flanges 22, thereby connecting the circumferential flanges 22 having gaps.

First, as shown in FIG. 14A, for example, the operator moves the fastening fitting 40 straight from a position radially inside the hole 22a toward the radially outside (in the direction of the arrow in the figure). The fastening fitting 40 may be moved, for example, by an operator hitting it with a hammer or the like, or by press-fitting using hydraulic pressure or the like, but is not limited to these methods. Note that, at this time, the two circumferential flanges 22 may not be in complete contact with each other and may have a gap.

Next, as shown in FIG. 14(b), the fastening fitting 40 is moved radially outward while being tilted. As explained above with reference to FIG. 7, the width X1 of the narrow portion 51 is set to be smaller than the diameter d1 of the hole 22a, and the protruding portion 52 is formed in a substantially semicircular arc shape in plan view. , the narrow portion 51 and the protruding portion 52 can be easily inserted into the hole 22a.

Further, as shown in FIG. 14(c), while moving the grip portion 60 side downward from the state shown in FIG. 14(b), the fastening metal fitting 40 is moved radially outward. As a result, the fastening fitting 40 is pushed radially outward until the peripheral edge 22c of the hole 22a in the lower circumferential flange 22 of the vertically overlapping circumferential flanges 22 comes into contact with the inclined surface 51a. In this process, the inclined portion 61 is guided by the radially inner end 22b of the circumferential flange 22, moves inward from the front side of the opened grip portion 60, and accommodates the circumferential flange 22. In the state shown in FIG. 14(c), a diagonally upward force is applied by the insertion portion 50, and the inner end portions 22d of the two circumferential flanges 22 are held by the gripping portion 60 from the vertical direction (in the direction of the arrow in the figure). be done. That is, since a fastening force is applied by the fastening fitting 40 at the peripheral edge 22c and inner end 22d of the hole 22a, the circumferential flanges 22 are brought into contact with each other and connected.

In addition, when connecting the circumferential flanges 22 with the fastening fittings 40 according to the first modification, first, as shown in FIG. The fastening fitting 40 is moved radially outward so that it is located at . Next, as shown in FIG. 15(b), the fastening fitting 40 is moved downward until the intermediate portion 70 contacts the circumferential flange 22. Furthermore, as shown in FIG. 15(c), the inner end 22d of the circumferential flange 22 is held by the gripping part 60 which is open at the front, and the second gripping part 90 grips the periphery of the hole 22a in the circumferential flange 22. The fastening fitting 40 is moved radially outward until the portion 22c is clamped.

In this way, the circumferential flanges 22 are held together by the fastening fittings 40 not only at the inner end (inner end 22d) of the circumferential flange 22 in the radial direction but also at the position of the hole 22a (peripheral edge 22c). That is, since the adjacent circumferential flanges 22 can be fastened together at two locations via the holes 22a using the fastening fittings 40, the wall body 1 made of the liner plate 20 can be fastened even when shearing force or separation force is applied. The amount of deformation can be reduced, and the safety of the liner plate connected body 2 can be improved.

Although FIGS. 13 to 15 describe the case where the circumferential flanges 22 are connected to each other, the same method can be applied to the case where the axial flanges 23 are connected to each other. Specifically, since the fastener 40 is inserted straight from the radially inner side to the radially outer side of the axial flange 23 without rotating, the fastener 40 is prevented from interfering with (contacting) the corrugated steel plate 21. The axial flanges 23 can be fastened together.

FIG. 16 shows a state in which the fasteners 40 are attached to each hole 22a of the circumferential flange 22 and each axial connection hole 23a of the axial flange 23. For example, the fasteners 40 are attached not only to the holes 22a of the circumferential flange 22 in which the temporary fasteners 3 have not been inserted, but also to the holes 22a of the circumferential flange 22 in which the temporary fasteners 3 have been inserted. Further, the adjacent axial flanges 23 are held between the fastening metal fittings 40 via the axial connecting holes 23a formed in the axial flanges 23.

Note that various examples of how to attach the fastening fitting 40 can be considered. For example, the fasteners 40 may be inserted into all the holes in which the temporary fasteners 3 have not been inserted, or the fasteners 40 may be inserted into only some of the holes. Further, the fastening fittings 40 may be inserted into all the holes from which the temporary fastening devices 3 were taken out of the holes 22a into which the temporary fastening devices 3 were inserted, or the fastening fittings 40 may be inserted into only some of the holes. Good too. Since the fastener 40 has sufficient fastening force to the circumferential flange 22, the circumferential flange 22 and the axial flange 23 can be firmly fixed even if the fastener 40 cannot be attached to some of the holes 22a. I can do it.

FIG. 17 is a diagram showing a state in which bolts 41 are inserted into at least some of the holes 22a and axial connection holes 23a, and the circumferential flanges 22 and axial flanges 23 are connected to each other via the bolts 41 and nuts 42. be. In addition, in the form shown in FIG. 17, the same components and members as those in the form shown in FIG. 16 are given the same reference numerals, and the explanation thereof will be omitted.

As shown in FIG. 17, among the plurality of holes 22a, fasteners 40 are inserted into some of the holes 22a, and bolts 41 are inserted into other holes 22a. Moreover, among the plurality of axial connection holes 23a formed, fasteners 40 are inserted into some of the axial connection holes 23a, and bolts 41 are inserted into other holes 22a. The circumferential flanges 22 and the axial flanges 23 are connected to each other by the bolts 41 and nuts 42, for example, by screwing the bolts 41 into the nuts 42.

In this way, by using the fastening metal fittings 40 together with the bolts 41 and nuts 42, the liner plates 20 can be more firmly connected to each other, compared to the case where only the fastening metal fittings 40 are used. Note that the ratio of the bolts 41 and nuts 42 inserted into the hole 22a and the axial connection hole 23a is not particularly limited. For example, if it is necessary to firmly connect the liner plates 20 to each other, the ratio of bolts 41 and nuts 42 to the fastening fittings 40 may be increased, and all holes 22a and axial connection holes 23a may be A bolt 41 and a nut 42 may be inserted into. The larger the proportion of the bolts 41 and nuts 42 in the holes 22a and the axial connection holes 23a, the more firmly the liner plates 20 can be connected to each other.

FIG. 18 is a sectional view taken along line 16A-16A in FIG. 16. When the fastener 40 is attached to the circumferential flange 22, the circumferential flange 22 contacts the inclined surface 51a of the narrow portion 51 of the insertion portion 50, and movement of the circumferential flange 22 in the radial direction is restricted. . Since the insert portion 50 is inclined downward, the insert portion 50 and the protruding portion 52 apply an upward force to the circumferential flange 22 . That is, on the radially outer side of the hole 22a, the insertion portion 50 applies a vertical fastening force to the circumferential flange 22 (particularly the peripheral edge 22c of the hole 22a). Furthermore, the protrusion 52 pushes the circumferential flange 22 upward, thereby applying a vertical fastening force between the circumferential flanges 22 (particularly the circumferential edge 22c of the hole 22a). Furthermore, since the gripping portion 60 has elastic force and is formed wider than the insertion portion 50, the inner ends of the circumferential flanges 22 are gripped, and the radially inner circumferential flange 22 of the hole 22a A vertical fastening force is applied between the inner end portions 22d (in particular, the inner end portions 22d).

Note that even if a biased pressure or the like acts on the liner plate connection body 2 and a shear force acts between the circumferential flanges 22, causing a radial deviation of the circumferential flanges 22, the gap between the circumferential flanges 22 will be significantly The shift is suppressed. That is, as shown in FIG. 19(a), when a radially inward (lateral) shear force acts on the upper circumferential flange 22 and it shifts radially inward, the upper circumferential flange 22 The radially inner end 22b of 22 comes into contact with the inner surface 60a of the grip portion 60, thereby restricting movement inward in the radial direction. Alternatively, as shown in FIG. 19(b), if a radially outer shearing force acts on the upper circumferential flange 22 and it shifts radially outward, the upper circumferential flange 22 may move toward the protrusion. By coming into contact with 80, movement toward the outside in the radial direction is restricted.

In this way, even if a shear force acts between the circumferential flanges 22 connected in the vertical direction and a shift occurs between one circumferential flange 22 and the other circumferential flange 22, the fastening fitting 40 The fastening force can prevent the fastening fitting 40 from separating from the liner plate 20. Therefore, the amount of deformation of the wall body 1 constituted by the liner plate 20 can be reduced, and the safety of the liner plate connected body 2 can be improved.

1 Wall body 2 Liner plate connection body 20 Liner plate 21 Corrugated steel plate 22 Circumferential flange 22a Hole 22b End portion 22c Peripheral portion 22d Inner end portion 23 Axial flange 23a Axial connection hole 29 Connection member 3 Temporary fastener 30 Holding mechanism 31 Base 31a Front surface 31b Back surface 31d Hole 32 Insertion section 32a Shaft 32b Slit 33 Locking section 33a Movable section 40 Fastening fittings 41 Bolts 42 Nuts 50 Insert section 51 Narrow section 51a Inclined surface 52 Projection section 60 Gripping section 60a Inner surface 61 Inclined section 70 Intermediate part 70a Lower surface 71 Notch part 72 Slit 80 Projection part 80a Projection part 80b Projection part 90 Second grip part 90a Second grip part 90b Second grip part 91 Inclined part 91a Inclined part 91b Inclined part 92 Linear part 92a Straight part 92b Straight part 93 Arc part 93a Arc part 93b Arc part 100 Shaft M Central axis W Central axis P1 Separation distance

Claims (8)

A method for connecting liner plates for connecting liner plates having flanges with a plurality of holes at the upper and lower ends as well as at both side ends, the method comprising:
temporarily fixing the flanges together by inserting a temporary fixing member into some of the holes drilled in the flange of one liner plate and the flange of the other liner plate, respectively;
Aligning the positions of the plurality of holes respectively drilled in the flange by the temporary fixing member,
Adjusting the shape of the shaft formed by the temporarily fixed flanges,
Of the plurality of holes drilled in the flanges, the holes in which the temporary fixing members are not inserted are used to fully tighten the flanges;
When the flanges are finally tightened, a fastening force is applied between the flanges through the plurality of holes from the radially inner side of the flange to the radially outer side of the flange to the hole in which the temporary fixing member is not inserted. An insertion part to be inserted, a grip part to grip the inner ends of the flange in the radial direction, and an intermediate part located between the insertion part and the grip part are formed by bending a single metal plate member. connecting the liner plates by inserting the fasteners and bringing the flanges close to each other;
A method for connecting liner plates characterized by: The method for connecting liner plates according to claim 1, characterized in that, before the flanges are finally tightened, the flanges temporarily fixed by the temporary fixing member are drawn together and temporarily tightened. A claim characterized in that the liner plates are connected to each other by inserting the fastening fittings into some of the plurality of holes drilled in the flange and inserting bolts into other holes. 3. The method for connecting liner plates according to 1 or 2. A method for connecting liner plates for connecting liner plates having flanges with a plurality of holes at the upper and lower ends as well as at both side ends, the method comprising:
temporarily fixing the flanges together by inserting a temporary fixing member into some of the holes drilled in the flange of one liner plate and the flange of the other liner plate, respectively;
Aligning the positions of the plurality of holes respectively drilled in the flange by the temporary fixing member,
Adjusting the shape of the shaft formed by the temporarily fixed flanges,
Of the plurality of holes drilled in the flanges, the holes in which the temporary fixing members are not inserted are used to fully tighten the flanges;
When the flanges are finally tightened, a fastening force is applied between the flanges through the plurality of holes from the radially inner side of the flange to the radially outer side of the flange to the hole in which the temporary fixing member is not inserted. an insertion part that holds the flange, a grip part that grips the inner ends of the flange in the radial direction, and a protrusion that is located between the insertion part and the grip part and that can be locked in a hole drilled in the flange. connecting the liner plates by inserting a fastening fitting having an intermediate portion and bringing the flanges close to each other;
A method for connecting liner plates characterized by: A fastening fitting for gripping the flanges of the liner plates when connecting the liner plates having flanges with a plurality of holes at the upper and lower ends and both side ends,
an insertion portion that applies fastening force between the flanges through the plurality of holes;
a gripping portion that grips the inner ends of the flange in the radial direction;
An intermediate portion located between the insertion portion and the gripping portion is formed by bending a single metal plate-like member.
A fastening fitting featuring: A fastening fitting for gripping the flanges of the liner plates when connecting the liner plates having flanges with a plurality of holes at the upper and lower ends and both side ends,
an insertion portion that applies fastening force between the flanges through the plurality of holes;
a gripping portion that grips the inner ends of the flange in the radial direction;
A fastening fitting characterized by comprising: an intermediate portion located between the insertion portion and the grip portion and having a protrusion that can be locked in a hole drilled in the flange . The fastening fitting according to claim 5 or 6, wherein the insertion portion is formed in a substantially U-shaped cross section so as to sandwich the adjacent flanges via a hole drilled in the flange. The fastening fitting according to any one of claims 5 to 7, wherein the gripping portion is formed in a substantially U-shaped cross section so as to grip the inner ends of the adjacent flanges in the radial direction. .

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