JP2016020726A - Connecting structure of corrugate metal plate member and temporary joint washer used in the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a temporary joint washer which has a function for preventing the come-off of a bolt from a bolt insertion hole by being tightly fit to the bolt when bolt-connecting portions facing a ground foundation between end parts of two corrugate metal plate members, and is easy in attachment work to the bolt.SOLUTION: A bolt 3 is inserted into a bolt insertion hole 1c of an end part 1f (crest p viewed from the curved inside) of one corrugate metal plate member 1 from the ground face side, and a resin-made temporary joint washer 5 is made to cover a screw part which is protruded upwardly, and pushed into a depth until it contacts with an upper face of the member. A bolt temporary joint hole 5a of the temporary joint washer is smaller than an outside diameter of the bolt 3, and larger than a diameter of a trough. The temporary joint washer is tightly fit to the bolt, and holds the bolt so as not to come off from the bolt insertion hole 1c. Since the temporary joint washer is formed of resin, an elasticity range is wide compared with a conventional steel-made temporary joint washer, rigidity is also suitable, and the washer can be pushed into the bolt by finger-pushing light force, however, the washer exhibits delicate holding force which avoids the come-off of the washer by force at a degree of the weight of the bolt.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a corrugated metal plate constituting a corrugated water channel for civil engineering such as a corrugated U-shaped flume or a corrugated pipe in which a corrugated metal plate subjected to corrugation is curved in an arc shape or a U shape in a direction orthogonal to the corrugated direction. The present invention relates to a connection structure for corrugated metal plate members that bolts mutually facing ends of two corrugated metal plate members when constructing the member, and a temporary fixing washer used therefor.

Corrugated metal plate members that constitute corrugated waterways such as corrugated U-shaped flumes and corrugated pipes are known as waterway materials used for agricultural waterways, industrial waterways, temporary drainage channels for civil engineering work, and the like. In the case of a corrugated pipe, it is also used as a simple tunnel or a culvert under the road in addition to the water channel.
In general, this type of corrugated metal plate member is connected to each other by overlapping the end portions that are ridges of waves as viewed from the inside of the curve, and the bolts are inserted into the bolt insertion holes formed at the respective end portions. It is carried out by inserting from the member lower surface side near the center and projecting to the inside of the curve (the member upper surface side near the center in the member width direction), screwing the nut to the projecting bolt and fastening it.

  Patent Document 1 is a case of a corrugated steel pipe having a circular cross section obtained by combining two semicircular corrugated steel sheets obtained by corrugating corrugated steel sheets curved in a semicircular shape, and improving the roughness coefficient as a water channel. In order to achieve this, conventionally, a paving material mainly composed of bituminous material is coated on the inner surface of a semicircular corrugated steel sheet at a factory. For example, a paving sheet made of a fiber reinforced thermoplastic resin composite material is used as a semicircular corrugated sheet. By attaching the bolts to the inner surface of the steel plate, it is not necessary to paint the pavement material on the joints between the semicircular corrugated steel plates on site, thereby eliminating the problem of the working environment and the roughness. Although the coefficient can be improved and the economic efficiency can be improved, as shown in FIG. Bolt as the binding portions described above, and has the structure for connecting is indicated by a nut.

In FIG. 10, the connection structure between the semicircular corrugated steel plates 51 and 51 is basically an end portion that is a wave peak p when viewed from the inside of the curve (upper side in FIGS. 10A and 10B). 51f are overlapped, and the bolt 53 is inserted from the outside of the curve (the lower side in FIGS. 10 (a) and 10 (b)) with the curved washer 52 interposed in the bolt insertion hole 51c formed in each end 51f. It is a bolt connection structure that protrudes inward of the curve, and that is screwed onto the protruding bolt 53 by screwing a nut 54.
However, for the bolt connection portion that is placed on the ground, particularly in the vicinity of the center in the width direction, as shown in an enlarged view in FIG. 10 (b), a temporary washer 55 for temporarily fixing the bolt 53 so as not to come off is usually provided. Intervene. This is because in the state where the end portions of the two semicircular corrugated steel plates 51 and 51 are overlapped, the hand and tool do not reach the lower surface of the central portion in the member width direction in contact with the ground, and the bolt head 53a cannot be pressed. This is because the bolt 53 falls off in the state where the temporary fixing washer 55 is not provided.

In general, for example, if the bolt 53 is M10 (outer diameter 10 mm) as this type of temporary fixing washer, as shown in FIG. A temporary fixing washer 55 made of a steel plate having four protrusions 55b formed by opening a temporary fixing hole 55a and bending an acute angle tip is used. Each protrusion 55b is slightly inclined toward the center. The inner diameter (distance between the projections 55b) of the bolt temporary fixing hole 55a is slightly smaller than the outer diameter of the bolt, and it covers the threaded portion of the bolt 53 and pushes it toward the bolt head 53a without rotating it. The threaded portion 53b of 53 is closely fitted to prevent the bolt 53 from falling off.
In Patent Document 1, only a temporary reference to the washer 55 is mentioned, and there is no description of the shape, material, etc., but this is generally considered to be the case.

By the way, if the waterways such as the above-mentioned agricultural waterways, industrial waterways, and temporary waterways for civil engineering work are places where sand etc. is always mixed in along with the flow of water, the water and sand flow down together, so they are worn locally. There are things to do. The corrugated U-shaped flume and corrugated pipe are generally made of steel, and are often galvanized for the purpose of improving corrosion resistance. Parts may be exposed and rust corrosion may occur.
Moreover, when using as the above-mentioned simple tunnel or a culvert under a road, it has been performed that a long-term installation is possible by providing a plating layer on the surface of a steel material.
As disclosed in Patent Document 2, a small drainage groove installed on the floor surface of a building kitchen or the like is a simple stainless steel plate formed in a U-shaped cross section, but a corrugated U-shaped flume. Stainless steel corrugated metal plate members for civil engineering such as corrugated pipes are not known.

  Further, as a temporary fixing washer similar to the temporary fixing washer 55 in Patent Document 1, a cut 64 is provided at an arbitrary position around the bolt through-hole 63 as in the temporary fixing washer (temporary fixing tool) 61 shown in FIG. The circular temporary fixing washer made of an elastic sheet 62 made of soft synthetic resin or the like that can be attached to the bolt by pushing it toward the bolt head without rotating the temporary fixing washer according to the thread of the bolt. 61 is known (Patent Document 3). The temporary fixing washer 61 is used for preventing the temporary fixing washer from sliding off the bolt.

JP-A-8-270840 JP2011-157756 Mito No. 3004372

Since the steel temporary fixing washer 55 as shown in FIG. 11 is covered with the threaded portion of the bolt 53 and pushed toward the bolt head without being rotated, the steel material is elastically deformed and pushed. There is a problem that a strong force is required and workability is poor. Bolts that can be pushed in with a light force can be securely held by bolts, and the bolts cannot be held securely. In order to manufacture it, it is necessary to make the size of the bolt temporary fixing hole with respect to the bolt diameter the optimum dimension with high accuracy. However, it is not easy to uniformly produce the optimum dimension with high accuracy. You will need strong power.
The temporary washer 55 is manufactured by making a die and pressing it. However, since the cost of the die is high, the cost of the temporary washer 55 is high even if it is small.

In addition, when a corrugated U-shaped flume or corrugated pipe is installed at a site where corrosion is a concern, or when extremely long-term installation is required, a stainless steel material such as Patent Document 2 is used on the main body to ensure high corrosion resistance. It is possible to use it.
In this case, when the steel temporary fixing washer is used as the temporary fixing washer used for the bolt connecting portion, the main body portion using the stainless steel and the steel temporary fixing washer are dissimilar metals. , Contact corrosion of dissimilar metals will proceed.
Therefore, when a stainless steel material is used for the main body portion, it is considered that the temporary fixing washer is also made of stainless steel, which is the same material as the main body portion. However, even if it is a steel temporary fixing washer, the engagement with the bolt requires a certain amount of force because it is pushed in while elastically deforming the steel material. When using a stainless temporary fixing washer, It is harder than steel and it is not easy to push it in with your fingers. For this reason, there is a concern that the temporary fixing washer used for the purpose of facilitating the construction becomes very difficult to use.
In addition, stainless steel is expensive, and the mold for manufacturing is expensive because it also processes stainless steel. Using stainless steel for temporary fixing washers that do not contribute to the rigidity of the main part of corrugated U-shaped flume etc. It is uneconomical.

   The present invention has been made in order to solve the above-described problems. When connecting the end portions of the corrugated metal plate members to each other with bolts, the workability of the operation of attaching temporary fixing washers to the bolts to prevent the bolts from falling off. The corrugated metal plate member, which can reduce the production cost of the temporary washer, and can prevent the occurrence of contact corrosion of dissimilar metals when the corrugated metal plate member is made of stainless steel. It is an object of the present invention to provide a structure and a temporary fixing washer used therefor.

The invention according to claim 1 which solves the above-mentioned problem is characterized in that two corrugated metal plate members obtained by curving corrugated metal plates in a direction orthogonal to the corrugated direction in an arc shape or a U shape are opposed to each other. It is a connection structure of corrugated metal plate members that are arranged on the soil foundation in piles and bolted to each other through bolt insertion holes formed at positions facing the soil foundation at the respective ends,
The bolt is inserted into the bolt insertion hole at the end of one corrugated metal plate member in advance from the lower surface side of the member and protruded to the upper surface side of the member, and a temporary bolt having an inner diameter that is smaller than the outer diameter of the bolt and larger than the valley diameter. The bolt is tightly fitted into the bolt temporary fixing hole by pressing a resin temporary fixing washer having a fixing hole on the bolt protruding toward the upper surface of the member until it approaches or contacts the upper surface of the member. The bolt is held at the bolt insertion hole position, and the bolt insertion hole at the end of the other corrugated metal plate member is held at the bolt insertion hole position at the end of the one corrugated metal plate member. The corrugated metal plate members are connected to each other by bolts by screwing the nuts onto the bolts.

  According to a second aspect of the present invention, there is provided the corrugated metal plate member connecting structure according to the first aspect, wherein the temporary fixing washer has an elliptical shape or an elliptical shape having a long width direction and a short width direction, and bolts on both sides of the long width direction. It has a holding allowance part whose distance from the inner edge of a hole for temporary fixing to an outer periphery of a washer is 10 mm or more.

According to a third aspect of the present invention, in the connecting structure of corrugated metal plate members according to the first or second aspect, the temporary fixing washer extends radially from the inner edge of the bolt temporary fixing hole toward the outer peripheral edge of the washer and does not reach the outer peripheral edge. It has a plurality of cuts.
According to a fourth aspect of the present invention, there is provided the corrugated metal plate member connecting structure according to the first or second aspect, wherein the temporary fixing washer has an elliptical shape or an elliptical shape having a long width direction and a short width direction, and the bolt temporary fixing hole. A plurality of cuts that extend radially from the inner edge toward the outer peripheral edge of the washer and do not reach the outer peripheral edge are formed not in the short width direction but only in an angular range in the vicinity of the long width direction.

  According to a fifth aspect of the present invention, there is provided the corrugated metal plate member connecting structure according to the second aspect, wherein the temporary fixing washer has a cut-through notch reaching only the one side in the short width direction from the inner edge of the bolt temporary fixing hole to the outer periphery of the washer. It is characterized by having.

  A sixth aspect of the present invention is the corrugated metal plate member connection structure according to any one of the first to fifth aspects, wherein the corrugated metal plate is a corrugated stainless steel plate made of a stainless steel plate.

The invention of claim 7 is a temporary fixing washer used for the corrugated metal plate member connection structure of claim 1,
It has an elliptical shape or an oval shape having a long width direction and a short width direction, and has a holding allowance portion having a distance from the inner edge of the bolt temporary fixing hole to the outer periphery of the washer at least 10 mm on both sides of the longer width direction. It is characterized by that.

In the connection structure of the corrugated metal plate member of the present invention, when the bolt insertion hole portions of the two corrugated metal plate members placed on the ground (soil foundation) in contact with the ground are bolted, By pushing the stop washer from the upper side against the bolt inserted into the bolt insertion hole at the end of one corrugated metal plate member from the lower surface side of the member and projecting to the upper surface side of the member until it contacts the upper surface of the member, The bolt can be held at the bolt insertion hole position in a state in which the bolt is tightly fitted into the bolt temporary fixing hole of the temporary fixing washer. Thus, the bolt is temporarily fixed at the bolt insertion hole position, and is kept upright without falling off. In this state, the bolt insertion hole at the end of the other corrugated metal plate member is temporarily fixed at the bolt insertion hole position at the end of the one corrugated metal plate member to maintain the upright state. Covering from above, the other corrugated metal plate member can be overlaid on the end of the one corrugated metal plate member.
When the ends of both corrugated metal plate members are overlapped, the bolt head cannot be pressed because the hand or tool cannot reach the bolt head on the ground side of the bolt insertion hole, but the bolt is temporarily inserted into the bolt insertion hole. Since it is stopped, the bolt connection work becomes possible.

Since the temporary fixing washer according to the present invention is made of resin, it can be pressed with a light force unlike the temporary fixing washer made of steel when being pushed toward the bolt head without being rotated by being covered with the threaded portion of the bolt.
Resin temporary fixing washers have a wider elastic range than steel ones, so even if the inner edge of the hole is deep inside the screw groove (screw valley) of the bolt thread, When pushing in, the vicinity of the inner edge of the hole is easily elastically deformed and can be pushed in with a light force pushed with a finger. On the other hand, the inner diameter of the bolt temporary fixing hole can be set to an inner diameter in which the inner edge of the hole penetrates deep into the thread groove of the threaded portion of the bolt as described above. The inner edge does not get over the thread, and the bolt can be effectively temporarily fixed.
In addition, the resin temporary fixing washer is more suitable than the steel one in terms of rigidity. In other words, the rigidity of the temporary stopper washer made of resin allows the delicate effect that the inner edge of the hole enters the screw groove of the bolt even with a light force pressed with a finger, but it does not get over the screw thread with a force about the weight of the bolt. It is extremely appropriate compared to the high rigidity of the temporary steel washer.
As mentioned above, it can be pushed into the bolt with a light force of pushing with a finger, so the bolt temporary fixing work is extremely simple and easy to work compared to the steel temporary fixing washer, and the construction efficiency itself of the corrugated metal plate member is also improves.

Moreover, since it is remarkably light compared with the thing made from steel, handling is easy.
Further, since there is no projection 55b like the temporary fixing washer 55 made of steel, it is easy to handle during storage and carrying, and there is no need to distinguish between the front and the back, so when attaching to the bolt, each side There is no complications to confirm.
In addition, it is extremely flexible compared to steel ones, and even if it is interposed between corrugated metal plate members at the peak, it fits into the curved surface of the peak, so the gap between the corrugated metal plate members can be minimized. ,preferable.
In addition, resin temporary fixing washers are manufactured by making molds and pressing them, just like steel ones. However, the required pressing load is significantly smaller than steel ones. Various aspects such as extremely low wear, long life, and simple flat plate with no protrusions, etc., which can significantly reduce the cost of molds, have high production efficiency, and have low material costs. The cost of the temporary washer can be reduced.

  According to the temporary fixing washer having an allowance portion of 10 mm or more on both sides in the long width direction as in claim 2, the allowance portion can be held by a finger, and the screw portion of the bolt It is easy to push the cover bolt into the head side.

The temporary fixing washer having a plurality of incisions extending radially from the inner edge of the bolt temporary fixing hole toward the outer peripheral edge of the washer and having a plurality of cuts not reaching the outer peripheral edge, This is effective in smoothing the bending deformation of the portion that is bent when entering the groove.
Further, if the radial notch is formed only in an angular range in the vicinity of the long width direction without forming it in the short width direction as in claim 4, the required rigidity of the cross section in the short width direction and the bolt head Both ease of pushing into the side can be ensured. In addition, since there is no notch in the short width direction, rigidity can be secured with a material width having a short dimension in the short width direction.

According to the temporary fixing washer having the cut-through cut only on one side in the short width direction as in claim 5, since it is separated by the cut-through cut only on one side in the short width direction, the twisted washer is twisted Bolts for temporarily fixing bolts can be widened, and operations for inserting and pushing into bolts are easy.
In addition, since there is no cut other than the punch-through cut, there is little possibility that the temporary washer is cracked.

  In the case where the corrugated metal plate member is made of stainless steel as in claim 6, when a conventional steel temporary fixing washer is used, rust is generated in the steel temporary fixing washer due to a potential difference between different metal contacts, Although the appearance of the installed stainless corrugated metal plate member is adversely affected, the temporary fixing washer is made of resin and does not rust and does not generate rust soup, the appearance is not impaired.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view showing two corrugated U-shaped flumes to be connected to each other, and FIG. FIG. 6 is an enlarged plan view of an intermediate portion omitted in a state in which end portions of two corrugated U-shaped flumes are connected with overlapping bolts, and (C) is a schematic left side view of the corrugated U-shaped flume of (B). It is a perspective view of the corrugated U-shaped flume. It is AA expanded sectional drawing of FIG. It is BB expanded sectional drawing of FIG. 1 (b) (however, an expansion rate differs from FIG. 3). It is a principal part enlarged view of FIG. It is CC sectional drawing of FIG. It is a figure explaining the procedure which bolts the edge parts of a corrugated U character flume like FIG. FIGS. 5A and 5B show a temporary washer in FIG. 5 and the like, in which FIG. 5A is a plan view and FIG. (A), (B), and (C) are plan views showing other embodiments of the temporary fixing washer. For explaining a conventional example, (a) is a cross-sectional view of a bolt connecting portion between end portions of a corrugated pipe, and (b) is an enlarged view of a main part of (b). The conventional temporary fix washer is shown, (A) is a plan view, (B) is an EE cross-sectional view of (A). It is a perspective view which shows the other conventional temporary fix washer.

  Hereinafter, the connection structure of the corrugated metal plate member of the present invention and the form for carrying out the temporary fixing washer used for this will be described with reference to the drawings.

The present invention relates to a corrugated metal plate member such as a corrugated U-shaped flume or a corrugated pipe obtained by curving a corrugated metal plate such as a corrugated steel plate or a corrugated stainless steel plate in an arc shape or a U shape in a direction orthogonal to the corrugated direction. It is applied when constructing.
FIG. 1 illustrates an embodiment of a connecting structure for corrugated metal plate members according to the present invention. The illustrated example is for a case where a water channel is formed by a corrugated U-shaped flume 1.
FIG. 1 (a) is a plan view showing two corrugated U-shaped flumes 1 and 1 that are to be connected to each other, and FIG. 1 (B) is an end view of the two corrugated U-shaped flumes 1 and 1 of FIG. FIG. 2 is an enlarged plan view of the intermediate portion omitted shown in a state where they are overlapped and connected with bolts, and (c) is a schematic left side view of the corrugated U-shaped flume 1 of (a).
FIG. 2 is a perspective view showing the appearance of the corrugated U-shaped flume 1.

  The corrugated U-shaped flume 1 in the illustrated example has a corrugated cross section in which crests and troughs (the crests viewed from the inside of the curve are indicated by p and the troughs are indicated by q) in the longitudinal direction that is the flow path direction. A corrugated steel plate or a corrugated stainless steel plate is generally formed into a U-shaped groove shape, and in the illustrated example, the U-shaped groove portion 1a has flange portions 1b at both left and right ends. Bolt insertion holes for connecting the corrugated U-shaped flumes 1 are formed at both ends in the longitudinal direction. In the illustrated example, a bolt insertion hole 1c at the center in the width direction of the U-shaped groove portion 1a, two bolt insertion holes 1d on both sides thereof, and two bolt insertion holes 1e on the left and right flange portions 1b are formed. ing.

  When constructing a water channel using a corrugated U-shaped flume, when the corrugated U-shaped flumes 1 and 1 are connected to each other by bolts, the corrugated U-shaped flumes 1 and 1 are connected in a state where they are placed on the ground. In the portion where the bolt insertion hole is exposed, that is, in this embodiment, in the bolt insertion holes 1d and 1e other than the bolt insertion hole 1c at the center in the width direction in FIG. In a state where the end portions 1f of the character flume 1 are directly overlapped, the bolts are connected by bolts 3 'as shown in FIG. The bolt head is indicated by 3a ′.

However, at the portion of the bolt insertion hole that is in contact with the ground, that is, at the portion of the bolt insertion hole 1c at the center in the width direction of the U-shaped groove portion 1a, the bolt 3 falls off as shown in an enlarged view in FIG. A temporary fixing washer 5 is interposed for temporary fixing so as not to occur.
This is because the back surface side (ground side) of the bolt insertion hole 1c located at the peak portion when viewed from the inside of the curve is a gap with respect to the ground, so the bolt 3 inserted from the ground side into the bolt insertion hole 1c is its head. If the portion 3a is not supported from the ground side, it will fall off, but when the end portions 1f of the corrugated U-shaped flumes 1 and 1 are overlapped with each other, hands and tools do not reach the lower surface of the central portion in the width direction of the member contacting the ground. This is because the bolt head 3a cannot be pressed and the bolt 3 falls off unless the bolt 3 is temporarily fixed. Even when the mountain is low, the installation location is generally uneven on the excavated ground or the like, and there are many cases where a large gap is formed on the back side of the mountain, so a temporary washer is essential.

In this invention, it replaces with the temporary fix washer conventionally made of steel, and uses the temporary fix washer 5 made of resin. Resin parts are not generally used for parts that touch the soil in the civil engineering structure, water channel parts, or parts that are buried in the earth, but as described later, in the present invention, pay attention to the advantage of being a resin. Moreover, considering that it is a part for temporary fixing, it was made of resin as a temporary fixing washer.
The temporary fixing washer 5 of the embodiment shown in FIG. 8 has an elliptical shape with a plate thickness of 0.35 mm, a dimension in the long width direction (major axis) of 40 mm, and a dimension in the short width direction (minor axis) of 20 mm. The part is provided with a bolt temporary fixing hole 5a for tightly fitting the bolt 3 which is M10 in the embodiment so as to be temporarily fixed. Since the outer diameter of the threaded portion of the bolt of M10 is 10.000 mmφ and the diameter of the valley is 8.376 mmφ, the diameter of the bolt temporary fixing hole 5a is set to be between 8.376 mm to 10,000 mm. It is set to 8.5 mmφ.

The temporary fixing washer 5 in the illustrated example not only simply forms a circular bolt temporary fixing hole 5a in the center, but also extends from the inner edge (hole inner edge 5a ′) of the bolt temporary fixing hole 5a toward the outer periphery of the washer. A cut 5b that does not reach the periphery is formed. In the example of illustration, the notch 5b extended in the long width direction (major diameter direction) is formed, without forming in a short width direction (minor diameter direction). That is, four cuts 5b extending radially at an angle of 30 degrees are formed on both sides of the long diameter line on both sides in the long diameter direction (both left and right sides in FIG. 8A).
The temporary fixing washer 5 of this embodiment has a sufficiently long length of 40 mm with respect to a short width direction of 20 mm, and a holding allowance portion of 10 mm or more is formed on the outer peripheral edge side in the long width direction. ing. Therefore, it is easy to hold the temporary fixing washer 5 with a finger and put the bolt 3 on it, and further to push it into the bolt head 3a side.
Further, this temporary fixing washer 5 is formed with four notches 5b, so that each portion (each between adjacent notches 5a) engaged with the thread groove (thread valley) of the threaded portion 3b of the bolt 3 is formed. The portion) can be bent individually, so that the bending deformation of the portion bent when the hole inner edge 5a 'enters the screw groove of the screw portion 3b of the bolt 3 is smoothly performed.
Further, since the notch 5b is almost only in the vicinity of the long width direction and not in the short width direction (short diameter direction), the temporary fixing washer 5 has a required rigidity with respect to the cross section in the short width direction and the bolt head side. Both ease of pushing in can be ensured. In addition, since there is no notch in the short width direction, rigidity can be secured with a material width having a short dimension in the short width direction.
As the material resin, a resin (including rubber) having appropriate hardness and rigidity is preferable. For example, a polyester resin is preferable, and a polyester film is more preferable. However, polycarbonate, acrylic resin, and the like are also preferable. Can be used.

A procedure for bolting the two corrugated U-shaped flumes 1 and 1 using the temporary washer 5 will be described with reference to FIG.
The bolts of the corrugated U-shaped flumes 1 are connected with the downstream side of the bolt connecting portion facing down and the upstream side facing up. In FIGS. 1A and 1B, the left side is a downstream corrugated U-shaped flume and the right side is an upstream corrugated flume. 4, 5, and 7, the left side is the corrugated U-shaped flume on the downstream side and the right side is the upstream side.
In addition, the bolt insertion hole portion (the portion of the bolt insertion hole 1c in the center in the width direction in the illustrated example) at the location in contact with the ground is first bolted and then the other location is bolted.
First, the downstream corrugated U-shaped flume 1 is placed on the ground at the installation location, and as shown in FIG. 7 (a), the member width at the end 1f, which is the peak p at the upstream end (upstream end). The bolt 3 is inserted from the lower side, that is, the ground side (curved outside) with the curved washer 2 interposed in the bolt insertion hole 1c at the center in the direction, and the threaded portion 3b protrudes upward (curved inside).
Next, holding the temporary fixing washer 5 with a finger, cover the screw part 3b of the bolt 3 protruding upward from above, and as shown in FIG. 7 (b), with the finger on the lower side, that is, the bolt head 3a side, The bolt 3 is pushed down until it contacts the upper surface of the peak portion p of the downstream corrugated U-shaped flume 1, and the bolt 3 is held in the bolt insertion hole position in a state where the bolt 3 is closely fitted to the bolt temporary fixing hole 5 a. In this state, the hole inner edge 5a ′ of the temporary fixing washer 5 (the inner edge of the bolt temporary fixing hole 5a) is in the thread groove of the threaded portion 3b of the bolt 3, so that the bolt 3 is temporarily fixed. The washer 5 is temporarily fixed to the bolt insertion hole 1c, and is kept upright without falling off.
In this state, as shown in FIG. 7C, the bolt insertion hole 1c of the end portion 1f of the upstream (right side) corrugated U-shaped flume 1 is connected to the end portion of the downstream (left side) corrugated U-shaped flume 1. The upstream corrugated U-shaped flume 1 is overlapped with the end portion 1f of the downstream corrugated U-shaped flume 1 so as to cover the bolt 3 that is temporarily fixed to the bolt insertion hole 1c of 1f and kept upright.
At this stage, the temporary fixing washer 5 made of resin is easily bent by the weight of the corrugated U-shaped flume and fits into the curved surface of the mountain p as shown in the figure, and the gap between the upper and lower corrugated U-shaped flume is about the thickness of the temporary fixing washer 5 Just do it.
Next, when the curved washer 6 is put on the bolt 3 and the nut 4 is screwed together and fastened, the bolt connection between the end portions of the corrugated U-shaped flumes 1, 1 in the width direction is performed.

  In the above description, the bolt 3 is inserted into the bolt insertion hole 1c at the upstream end 1f of the corrugated U-shaped flume 1 on the downstream side of the bolt connecting portion, and temporarily fixed with the temporary fixing washer 5 (FIG. ), (B)), and the upstream end 1f of the corrugated U-shaped flume 1 on the upstream side thereof are attached by overlapping nuts 4 and bolted (FIGS. 7 (C), (D) ), But a plurality of corrugated U-shaped flumes are prepared in advance by preparing preparation main body parts by temporarily fixing bolts by the operations of FIGS. 7 (a) and 7 (b). The work efficiency is good if the preparation main body parts are constructed in the order of connecting them by the work shown in FIGS.

  In the bolt insertion holes 1d and 1e other than the bolt insertion hole 1c at the center in the width direction of the U-shaped groove 1a, a hand or a tool is put on the head 3a 'of the inserted bolt 3' as shown in FIG. Since it can be applied, the temporary fixing washer 5 is not required and the bolt can be connected by a normal operation.

Since the temporary fixing washer 5 is made of resin as described above, it can be pressed with a light force unlike the temporary fixing washer made of steel, when being pushed toward the bolt head 3a without being rotated over the threaded portion 3b of the bolt 3. In the case of the temporary fixing washer 5 made of resin, the elastic region is wider than that of the steel one, so that the screw head 3b even if the hole inner edge 5a 'has an inner diameter that penetrates deeply into the screw groove of the screw portion 3b of the bolt 3 When it is pushed in, the vicinity of the inner edge of the hole is easily elastically deformed and can be pushed in with a light force pushed by a finger. On the other hand, since the inner diameter of the bolt temporary fixing hole 5a can be set to an inner diameter in which the hole inner edge 5a ′ penetrates deeply into the thread groove of the threaded portion 3b of the bolt 3, as described above, The hole inner edge 5a ′ that has entered the thread groove does not get over the thread, and the bolt 3 can be effectively temporarily fixed.
In addition, the resin temporary fixing washer is more suitable than the steel one in terms of rigidity. In other words, the rigidity of the resin temporary fixing washer is such that the inner edge of the hole enters the screw groove of the bolt even with a light force pressed with a finger, but it does not get over the screw thread with a force about the weight of the bolt. This is extremely suitable because of the high rigidity of the temporary fixing washer.
As mentioned above, it can be pushed into the bolt with a light force of pressing with a finger, so the bolt temporary fixing work is extremely simple and easy to work compared to the steel temporary fixing washer, and the construction efficiency of the corrugated U-shaped flume itself is also improves.

Moreover, since it is remarkably light compared with the thing made from steel, handling is easy.
Moreover, since there is no projection 5b like the temporary fixing washer 5 made of steel, it is easy to handle when storing or carrying it, and it is not necessary to distinguish between the front and the back. There is no complications to confirm.
In addition, the flexibility is remarkably higher than that made of steel, and even if it is interposed between the corrugated U-shaped flumes stacked at the peak, it fits into the curved surface of the peak, so the gap generated between the stacked corrugated U-shaped flume is Minimal and preferred.
In addition, the resin temporary fixing washer 5 is manufactured by making a die and pressing it in the same manner as the steel one, but the required pressing load is significantly smaller than that of the steel one. Since the wear of the mold is extremely small, the life is long, and a simple flat plate without projections etc., the cost of the mold can be remarkably reduced, the production efficiency is high, and the material cost is also low. The cost of the temporary washer from the surface can be reduced.

Corrugated metal plate members such as conventional corrugated U-shaped flume or corrugated pipe are made of steel, and stainless steel is not known, but it is required to be installed on the site where corrosion is a concern or to be installed over a long period of time. In this case, in order to ensure high corrosion resistance, it can be considered to be made of stainless steel.
In this case, if the conventional steel temporary fixing washer is used, rust is generated due to the potential difference between the dissimilar metal contacts in the temporary steel washer, and the appearance of the stainless corrugated metal plate member that has already been installed is adversely affected by the rust. However, when the resin temporary fixing washer 5 of the present invention is used, it does not rust and no rust juice is produced, so that the appearance is not impaired.

FIG. 9 shows another embodiment of the temporary fixing washer.
The temporary fixing washer 5 'shown in FIG. 9 (a) is the same as the temporary fixing washer 5 in FIG. 8 in the plate thickness, outer dimensions (elliptical), the shape dimensions of the bolt temporary fixing holes 5a, and the notch 5b. However, a small hole 5c for relaxing stress concentration is formed in each of the four cuts 5b in FIG. Since stress concentrates at the back end of the cut 5b and cracks easily occur, the stress concentration is relaxed by the small holes 5c to prevent cracks from occurring.

The temporary fixing washer 5 ″ shown in FIG. 9 (b) is the same as the temporary fixing washer 5 in FIG. 8 in the plate thickness, outer dimensions (elliptical shape), and the shape dimensions of the bolt temporary fixing holes 5a. A through-cut 5d that reaches the washer outer periphery from the hole inner edge 5a 'is formed only on one side in the short width direction (minor diameter direction).
According to this temporary fixing washer 5 ", the bolt temporary fixing hole 5a can be widened by twisting the temporary fixing washer 5" because the temporary cutting washer 5 "is separated only on one side in the short width direction. 3 is easy to insert and push.
Further, since there is no cut other than the punch-through cut 5d, there is little possibility that the temporary fixing washer 5 "will be cracked.

  The temporary fixing washer 5 ″ ′ shown in FIG. 9 (c) is the same as the temporary fixing washer 5 in FIG. 8 in the plate thickness, outer dimensions (elliptical shape), and the shape dimensions of the bolt temporary fixing holes 5a. Instead of the mere notch 5b having a width of 8, an elongated triangular notch 5e having an opening at the hole inner edge 5a 'side is formed.

In the above-described embodiment, the temporary washer 5 is used at only one place in the central part in the member width direction, but the bottom part of the U-shaped groove-shaped part is wide and the bolts are connected at a plurality of places in contact with the ground. When it is necessary to do so, a temporary fixing washer is naturally used for the bolt connecting portions at a plurality of locations.
Further, in the embodiment, the corrugated U-shaped flume 1 in which the U-shaped groove portion and the flange portions at both ends thereof are illustrated and described, but only the U-shaped groove shape portion in which the main body portion does not have a flange. It can also be applied to a corrugated U-shaped flume having a cross-sectional shape, and can also be applied to a corrugated U-shaped flume having a U-shaped groove formed by bolting two to three parts. .
Of course, the present invention can also be applied to a corrugated pipe having a circular section by combining two semicircular corrugated metal plates, or a corrugated pipe having a circular section by connecting three or more arc-shaped corrugated metal plates.
In addition, the application is not limited to a water channel, and can be applied to a simple tunnel, a culvert under a road, and other applications.
In short, corrugated waterways such as corrugated U-shaped flumes and corrugated pipes that are curved in an arc shape or U-shape in a direction perpendicular to the corrugated direction, and corrugated metal plate members for civil engineering work. It can be applied to various cases having a connecting portion.

1 Corrugated U-shaped flume (corrugated metal plate member)
DESCRIPTION OF SYMBOLS 1a U-shaped groove part 1b Flange part 1c Bolt penetration hole 1d (in the center part of the member width direction which touches the ground) 1e Bolt penetration hole 1f (It is a connection part of corrugated U-shaped flumes) End 2 Curved washer 3 Bolt 3a Bolt head 3b Threaded portion 4 Nut 5, 5 ', 5 ", 5"' Temporary fixing washer 5a Bolt temporary fixing hole 5a 'Hole inner edge 5b Notch 5c Small hole 5d Cut-through notch 5e Notch p (corrugated metal Peak q (viewed from inside of curved plate member) Valley (viewed from inside of curved corrugated metal plate member)

Claims (7)

Two corrugated metal plate members obtained by corrugating corrugated metal plates curved in an arc shape or U-shape in a direction perpendicular to the corrugated direction are arranged on the soil foundation by overlapping each other. A corrugated metal plate member connecting structure in which bolt insertion holes formed at positions facing the soil foundation of the parts are connected to each other by bolts,
The bolt is inserted into the bolt insertion hole at the end of one corrugated metal plate member in advance from the lower surface side of the member and protruded to the upper surface side of the member, and a temporary bolt having an inner diameter that is smaller than the outer diameter of the bolt and larger than the valley diameter. The bolt is tightly fitted into the bolt temporary fixing hole by pressing a resin temporary fixing washer having a fixing hole on the bolt protruding toward the upper surface of the member until it approaches or contacts the upper surface of the member. The bolt is held at the bolt insertion hole position, and the bolt insertion hole at the end of the other corrugated metal plate member is held at the bolt insertion hole position at the end of the one corrugated metal plate member. The corrugated metal plate member connecting structure is characterized in that the corrugated metal plate member is bolted to each other by screwing the nut onto the bolt and attaching the nut.   The temporary washer has an oval or oval shape having a long width direction and a short width direction, and the distance from the inner edge of the bolt temporary fixing hole to the outer periphery of the washer is 10 mm or more on both sides of the long width direction. 2. The corrugated metal plate member connection structure according to claim 1, further comprising a holding portion.   The corrugated metal plate according to claim 1, wherein the temporary fixing washer has a plurality of cuts extending radially from the inner edge of the bolt temporary fixing hole toward the outer peripheral edge of the washer and not reaching the outer peripheral edge. Member connection structure.   The temporary fixing washer has an elliptical shape or an elliptical shape having a long width direction and a short width direction, and extends radially from the inner edge of the bolt temporary fixing hole toward the outer peripheral edge of the washer and does not reach the outer peripheral edge. 3. The corrugated metal plate member connection structure according to claim 1, wherein the cut is formed not in the short width direction but only in an angular range near the long width direction.   The connection structure of the corrugated metal plate member according to claim 2, wherein the temporary fixing washer has a cut-through notch extending from the inner edge of the bolt temporary fixing hole to the outer peripheral edge of the washer only on one side in the short width direction.   The corrugated metal plate member connection structure according to any one of claims 1 to 5, wherein the corrugated metal plate is a corrugated stainless steel plate made of a stainless steel plate. A temporary fixing washer used for the connection structure of the corrugated metal plate member of claim 1,
The temporary washer has an oval or oval shape having a long width direction and a short width direction, and the distance from the inner edge of the bolt temporary fixing hole to the outer periphery of the washer is 10 mm or more on both sides of the long width direction. A temporary fixing washer characterized by having a holding portion.

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