JP2005290914A - Form device for constructing civil engineering structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily take out corroded thinning material after construction in the case of constructing a bank or the like using the thinning material as a decorative form. <P>SOLUTION: The thinning materials 6 are stacked while fitting both ends of the thinning materials 6 into channel parts 4 of right and left steel support members 5 to form a form face comprising the thinning materials 6. The steel support member 5 is divided in at least three support member pieces 11, 12, 13. The partial support member piece 12 is made detachable in a front face direction with respect to the upper and lower support member pieces 11, 13. For example, a flange 12a and a web 12b on the front face of the support member piece 12 and a flange 12c on the rear face are formed in stepped shape, and a bolt 18 is inserted through a pipe 16 on the support member piece 13 side from a hole 12d in the front face of the support member piece 12, screwed to a nut-anchor 19 and tightened to join the support member pieces 12, 13 to each other. When it is necessary to replace the thinning material 6 due to aged corrosion after construction, the corroded thinning material 6 can be easily taken out by removing the partial support member piece 12. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  TECHNICAL FIELD The present invention relates to a formwork device for construction of a civil engineering structure used when constructing a civil engineering structure such as a dam or a retaining wall, and in particular, a thinning material can be provided as a decorative material on an outer wall surface where the civil engineering structure is exposed. The present invention relates to a formwork apparatus for constructing a civil engineering structure.

  In order to make effective use of thinned wood, when constructing civil engineering structures such as concrete dams and retaining walls, thinning materials are provided as decorative materials on the outer wall surface of the civil engineering structures. In this case, concrete placement is performed by using the formwork in which the formwork surface is formed of thinned wood as a throwaway formwork. Conventionally, as a formwork which forms a formwork surface mainly with thinned wood, there is a thing like patent documents 1-4.

  Patent Document 1 is a method of constructing a thinned material panel by attaching bolts (penetrating members) to a plurality of stacked thinned materials and fastening them into a panel, attaching a metal fitting for panel connection and an anchor material to the back side thereof. is there. If a plurality of thinned wood panels are connected vertically and horizontally to form an overall formwork and concrete is placed, a civil structure having an outer wall surface made of thinned wood is constructed. In this case, the thinned material is obtained by processing the upper and lower surfaces and the back surface into flat surfaces.

  Moreover, like patent document 2, standing up the support | pillar which has the groove part on the side and fixing the anchor to the back surface at intervals, and piles up several thinning materials, inserting the both ends into the groove part of the support | pillar There is also a method of forming a formwork surface made of thinned wood. In the example of Patent Document 2, thinned wood is used only on the downstream side, and a steel sheet pile is used on the upstream side.

  Moreover, like patent document 3, using the timber which processed the thinning material and made the upper and lower surfaces and the back surface flat, it connects each timber adjacent up and down with a pin, stacking so that each timber may contact | connect a support | pillar At the same time, there is a method of fixing some timber to the column with bolts.

As in Patent Document 4, a plurality of thinned timbers with logs are made into panels by penetrating bolts, and this thinned timber panel is inserted into the insertion grooves on the side surfaces of the pillars and stacked, and the formwork surface by thinned timber Some form a.
Furthermore, in this patent document 4, as a support | pillar, the support | pillar which has the main insertion groove | channel and the preliminary insertion groove | channel which insert the edge part of thinned material in back and forth is used, and when constructing a civil engineering structure, the main insertion of a support | pillar structure is used. The end of thinned material is inserted into the groove to form a formwork surface to construct a civil engineering structure. When the thinned material becomes obsolete, a panel made of new thinned material is inserted into the preliminary insertion groove. Therefore, the outer wall surface made of new thinned wood is formed. That is, it is a method of repairing by stretching a new panel in front of the old panel.
Patent No. 2877187 JP 2002-242164 JP 2001-200546 JP2001-177293

As in the above-mentioned Patent Document 1, in a formwork in which a plurality of thinned materials are connected with bolts to form a panel, and a metal fitting for anchoring the panel and an anchor material are attached to the back side thereof, the outer wall surface is constructed after the civil engineering structure is constructed. When thinned wood is corroded, it cannot be replaced with new thinned wood.
Moreover, like the patent document 2, in the case of a structure in which a thinning material is inserted into a groove-like portion of a column having an anchor fixed to the back surface, the column cannot be removed from the concrete frame after construction. Therefore, in order to take out the thinned material fitted in the groove portion of the column, the thinned material must be pulled up along the groove portion of the column one by one and taken out from the upper end of the column. This work is complicated and it is not easy to replace the corroded thinned wood with new thinned wood.

  The formwork of Patent Document 3 can remove the thinned wood from the support by removing the bolts, and can also separate the thinned wood by removing the connecting pins, so replace the corroded thinned wood with new thinned wood Is possible. However, the operation of connecting pins between thinned materials or fixing the thinned material to a column with bolts is extremely complicated, resulting in poor workability and high construction costs. In addition, since thinning material needs to be processed, the processing is complicated, and the cost also increases.

  The formwork of patent document 4 can form a new outer wall surface with the panel of a new thinned material outside the outer wall surface by the existing thinned material, and can make an external appearance favorable. However, it is not always appropriate because it leaves corroded thinned wood inside. In addition, repairing only a part of thinned wood panels (installing a new panel in front of the old panel) is inappropriate in appearance and practically impossible. In addition, since the thinned wood panel is inserted from the upper end of the column into the insertion groove of the column, a lifting machine that lifts the thinned tree panel high is also required for repair, which is complicated and the cost of repair work Also gets higher.

  The present invention was made to eliminate the above-mentioned conventional drawbacks, and can construct a civil structure such as a dam or retaining wall having an outer wall surface made of thinned wood, and is easy when the thinned wood is corroded after construction. An object of the present invention is to provide a formwork device for construction of civil engineering structures that can be replaced with new thinned wood.

The invention of claim 1 that solves the above-mentioned problem is that a plurality of steel support materials having groove-like portions on both side surfaces are provided at intervals, and a large number of thinning materials that are horizontally disposed between the left and right steel support materials. It is a formwork device for constructing a civil engineering structure that is formed by stacking both ends thereof while being fitted into the groove-shaped portion,
The steel support material is divided into at least three support material pieces in the vertical direction, and the support material pieces adjacent to each other in the vertical direction are joined to each other by a fastening member and a part of the support material pieces that are not the lowermost part. Is characterized by having a shape that can be removed in the front direction with respect to the support material pieces adjacent to the upper and lower sides.

  A second aspect of the present invention is the first aspect of the present invention, wherein the upper and lower adjacent support material pieces have overlapping portions that overlap each other when viewed from the front-rear direction, and are inserted from the front side through the fastening member insertion holes provided in the overlapping portions. It is characterized in that they are joined to each other by a fastening member.

  A third aspect of the present invention provides the support member according to claim 2, wherein each steel support member is made of an H-shaped steel, and the support member pieces that can be removed in the front direction extend up and down with respect to the web. The upper and lower ends of the rear flange are recessed up and down with respect to the web. The support piece adjacent to the upper side of the removable support piece is at least the lower end of the front flange is higher than the web. The lower end of the flange on the rear surface extends downward with respect to the web, and the support piece adjacent to the lower side of the removable support piece has the upper end of the front flange with respect to the web. The upper flange of the rear flange extends upward with respect to the web, and the support material pieces adjacent to each other in the vertical direction are in contact with each other at the front and rear flanges and the web. It is characterized by That.

  In a third aspect of the present invention, in the third aspect, the pipe is joined to the web end of one supporting member piece in the vertically adjacent supporting member piece, and a fastening member insertion hole is formed in the flange in accordance with the hole of the pipe, and the other supporting member piece is provided. A fastening member insertion hole is formed at a position corresponding to the pipe of the flange of the piece of material, and a fastening member that is passed through from the front side through the fastening member insertion hole of the front flange, the pipe, and the fastening member insertion hole of the rear flange. The upper and lower support material pieces are fastened together.

A fifth aspect of the present invention is characterized in that, in the fourth aspect, the fastening member is a bolt, and a nut is screwed onto the bolt on the rear side of the rear flange to fasten the upper and lower support material pieces.
A bolt is suitable as the fastening member, but a fastening member that does not use a bolt can be used.

A sixth aspect of the present invention is characterized in that a nut / anchor formed integrally with an anchor material embedded in a concrete frame is used as the nut according to the fifth aspect.
A seventh aspect of the present invention is characterized in that, in the sixth aspect of the present invention, a nut and anchor is configured by forming a screw hole in the tip surface of the rod-shaped anchor material.

  An eighth aspect of the present invention is the civil engineering structure building form apparatus according to the first to seventh aspects, wherein the thickness of the thinned material is uneven.

  A ninth aspect of the present invention is the civil engineering structure building form apparatus according to the first to eighth aspects, wherein the thinning material is used while the bark remains as the thinning material.

  A tenth aspect of the present invention is a civil structure construction formwork apparatus for use in constructing a dam type civil engineering structure having exposed outer wall surfaces on both sides, and for constructing a civil engineering structure according to the first to ninth aspects. A pair of one-side formwork apparatuses having a structure of a formwork apparatus are arranged to face each other.

  Claim 11 is the formwork device for construction of civil engineering structure according to claim 10, wherein the vertical butterfly material is arranged facing the outer surface side of each of the pair of single-sided formwork devices, and the front and back of the vertical flap material facing each other Are connected by a separator through which insertion holes provided in the thinned timbers are inserted.

  Claim 12 is a formwork device for construction of a civil engineering structure according to claim 10 or 11, wherein a thinned material having an end inserted into a groove-shaped portion of a steel support material is formed in a groove shape on the back surface of the vertical butter material. A gap absorbing elastic member that is elastically pressed to the rear surface side within the part is attached along the longitudinal direction of the vertical sheet material.

  A thirteenth aspect of the present invention is the civil engineering structure building form apparatus according to the first to twelfth aspects of the present invention, wherein a template is installed on the back surface of the stacked thinned materials.

In the case of a structure in which a number of thinned lumber is inserted into the grooved portion of the steel support material and stacked, if the steel support material is a single piece, the thinned material can be removed from the groove of the steel support material in order to remove the thinned material. It must be pulled out from the upper end along the shape.
However, according to the present invention, the steel support material is divided into at least three support material pieces, and the intermediate support material pieces can be removed from the upper and lower support material pieces in the front direction. The thinned timber can be taken out from the part of the intermediate support piece that has been removed. That is, the thinned wood can be taken out from the middle in the height direction of the outer wall surface of the civil engineering structure. Therefore, it becomes easy to replace the thinned material when the thinned material is corroded. In particular, when the height of the civil engineering structure is high, the improvement in workability is remarkable as compared with the conventional structure taken out from the upper end.
Further, since the steel support material is divided into a plurality of parts and the individual support material pieces are reduced in weight, it can be easily carried by a person by hand, and in this respect, workability is good.
Moreover, since it is a structure which inserts a thinning material in the groove-shaped part of a steel support material, it does not need to give a complicated special process to the thinning material itself, and can reduce cost. Further, there is no need for an extremely complicated operation such as connecting pins between thinned materials or fixing the thinned material to a column with bolts, and the workability is good and the construction cost can be reduced.

The structure according to claim 2 is suitable as a structure capable of removing the intermediate support member piece in the front direction.
As in claim 3, the structure in which H-shaped steel is used as the steel support material and the front flange, the web, and the rear flange are stepped at the upper and lower ends of the support material piece, the intermediate support material piece is placed on the front surface. Suitable as a structure that can be removed in the direction. Further, it is also appropriate in that the load of the upper support material piece is easily applied to the lower support material piece.

  The structure in which the pipe is joined to the end portion of the web and the fastening member insertion hole is formed in the flange in accordance with the hole of the pipe as in claim 4, the support materials when the H-shaped steel is used as the steel support material. It is suitable as a fastening structure. In this case, a configuration in which a bolt is used as a fastening member and the nut is fastened with a nut as in claim 5 is appropriate.

  When a nut and anchor is used as a nut to be screwed and tightened to a bolt as a fastening member as in claim 6, the coupling between the support material piece and the anchor can be released by removing the bolt, and the support material piece Can be removed from the concrete frame.

  The structure in which the screw hole is formed in the tip end surface of the rod-shaped anchor material as in claim 7 is suitable as a structure in which both the nut and the anchor are used.

  Since the present invention has a configuration in which the ends of the thinned material are inserted and stacked in the groove-shaped portion of the steel support material, the outer diameter of the thinned material may not be uniform. Thinned wood can be used with the bark left. Thereby, thinned wood can be acquired at low cost, and effective use of thinned wood is further promoted.

  The civil engineering structure building form apparatus of the present invention is suitable for use in constructing a dam type civil engineering structure having exposed outer wall surfaces on both sides, as in claim 10.

  According to the eleventh aspect, it is possible to easily assemble the mold apparatus in which the pair of one-side mold apparatuses are arranged to face each other.

  If the elastic member for absorbing gaps is provided on the back surface of the vertical butterfly as in claim 12, the elastic member for absorbing gaps presses the thinned material to the rear side in the groove portion of the steel support material. Even if there are irregularities in the outer diameter, the irregularities are absorbed and the thinned wood is stacked in an orderly manner.

  When a template is installed on the back of the stacked thinned wood as in claim 13, a flat surface with less irregularities can be obtained as a concrete finished surface, and when thinned wood is replaced, discharge of existing thinned wood and new thinned wood The material can be inserted smoothly.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Preferred embodiments for carrying out the present invention will be described below with reference to a civil engineering structure building form apparatus according to an embodiment shown in FIGS.

1 is a front view of an essential part of a formwork apparatus 1 for constructing a civil engineering structure according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 3 is a cross-sectional view taken along line BB in FIG. 4 is a cross-sectional view taken along the line CC of FIG. FIG. 12 is an exploded perspective view of the main part. As shown in this drawing, this formwork apparatus 1 for constructing a civil engineering structure is a formwork apparatus for constructing a dam type civil engineering structure having exposed outer wall surfaces on both sides, such as a sabo dam. However, as shown in FIGS. 2 to 4, the pair of one-side mold apparatuses 2 and 3 are assembled to face each other. 2 to 4, reference numeral 2 denotes an upstream one-side formwork apparatus, and 3 denotes a downstream one-side formwork apparatus (hereinafter, simply referred to as a formwork apparatus in some cases).
Since both the one-side mold apparatuses 2 and 3 have substantially the same structure, the upstream-side mold apparatus 2 will be mainly described. As shown in FIG. 2, the mold apparatus 2 has a cross section having groove-like portions 4 on both sides. As shown in FIGS. 1 and 2, a plurality of thinning materials 6 that are turned sideways are placed between the left and right steel support materials 5. The both end portions are stacked while being fitted into the groove-like portion 4 to form a formwork surface.

As shown in FIGS. 1, 3 to 5, and the like, each steel support member 5 is a connecting bracket 9 that is welded and fixed to the foundation beam 8 on a foundation beam 8 made of channel steel provided in advance in the left-right direction on the foundation. It is fastened with bolts and nuts. The steel support material 5 has a cross-sectional shape having groove portions 4 on both side surfaces, and H-shaped steel is used in the embodiment.
In the present invention, the steel support member 5 is divided into at least three support member pieces. In this embodiment, as shown in FIG. 5, it is divided into five support material pieces 11, 12, 13, 14, and 15.
The details of the lower three support material pieces 11, 12, 13 will be described below. As shown in FIGS. 6, 7, and 8, the middle of the three support material pieces 11, 12, 13 to be connected. The support material piece 12 has a shape in which the upper and lower ends of the front flange 12a extend vertically with respect to the web 12b, and the upper and lower ends of the rear flange 12c are retracted both vertically with respect to the web 12b. In other words, the front flange 12a is longer than the rear flange 12c, and the upper and lower ends of the web 12b are vertically symmetrical between the upper end or lower end of the front flange 12a and the upper end or lower end of the rear flange 12c. A fastening member insertion hole 12d is formed at a position slightly above or below the upper and lower ends of the web 12b of the front flange 12a.
The lower shape of the support material piece 13 adjacent to the upper side of the intermediate support material piece 12 is such that the lower end of the front flange 13a is retracted upward with respect to the web 13b, and the lower end of the rear flange 13c is in the web 13b. On the other hand, the shape extends downward. The pipe 16 is fixed to the lower end of the web 13b by welding. In this embodiment, since the support material piece 14 continues further on the support material piece 13a, the upper shape of the support material piece 13 is symmetrical with the lower shape.
The upper shape of the support material piece 11 (the lowermost support material piece in the embodiment) adjacent to the lower side of the intermediate support material piece 12 is such that the upper end of the front flange 11a is retracted downward with respect to the web 11b. And the upper end part of the flange 11c of a rear surface is the shape extended upwards with respect to the web 11b. A pipe 17 is welded and fixed to the upper end of the web 11b. Reference numeral 11e denotes a bolt hole through which a bolt for fixing the support material piece 11 to the connecting bracket 9 on the foundation beam 8 side is passed.
As described above, the support material pieces adjacent to each other in the vertical direction are stepped with different heights of the front flange, the web, and the rear flange, and the joints of the upper and lower support material pieces are viewed from the front and rear direction. And has an overlapping portion (for example, a portion of an arrow range h in FIG. 5).

The support material pieces adjacent in the vertical direction are joined by bolts 18 and nuts / anchors 19. As shown in FIG. 9, the nut / anchor 19 has a configuration in which a flange 19 b is fixed to the rear end of the rod-shaped portion 19 a and a screw hole 19 c into which the bolt 18 is screwed is formed on the tip surface of the rod-shaped portion. A procedure for joining the three support material pieces 11, 12, and 13 using the bolt 18 and the nut / anchor 19 will be described.
The intermediate support material piece 12 is placed on the lowermost support material piece 11. At this time, the front flanges 11 a and 12 a are in contact with each other at the stepped ends, and the rear flanges 11 c and 12 c are in contact with each other. And the lower end of the web 12b of the support material piece 12 is placed so as to contact the pipe 17 at the upper end of the web 11b of the support material piece 11. Next, a bolt (fastening member) 18 is passed through the fastening member insertion hole 12d below the support material piece 12 from the front side, and is passed through the pipe 17 of the support material piece 11 and the fastening member insertion hole 11d. Next, the upper and lower support material pieces 11 and 12 are integrally coupled to each other by screwing and tightening a nut and anchor 19 which will be described later in detail to the tip of the bolt 18.
Next, the support material piece 13 is placed on the support material piece 12. At this time, the front flanges 12 a and 13 a having a step and the rear flanges 12 c and 13 c are in contact with each other, and the web of the support material piece 13 is provided. The pipe 16 at the lower end of 13b is placed so as to be in contact with the upper end of the web 12b of the support material piece 12. Next, the bolt 18 is passed from the front side through the fastening member insertion hole 12d in the upper part of the support material piece 12, and is passed through the pipe 16 of the support material piece 13 and the fastening member insertion hole 13d. Next, the nuts and anchors 19 are screwed into the ends of the bolts 18 and fastened to integrally connect the upper and lower support material pieces 12 and 13 together.

In the above description, only the three lower support material pieces 11, 12, and 13 have been described. However, the support material piece 14 adjacent to the upper side of the support material piece 13 has the same shape as the support material piece 12. Further, the lower shape of the uppermost support material piece 15 is the same as the lower shape of the support material piece 13, but the upper shape is not a step shape, but a flat shape with front and rear flanges and webs aligned. It is the upper end surface.
Therefore, when the support material pieces 14 and 15 are sequentially joined in the same manner as described above, the steel support material 5 having a predetermined continuous height can be obtained.
In addition, when raising the height of the steel support material 5 further, it can respond by accumulating the two support material pieces 12 and 13 mentioned above alternately.

After the steel support material 5 is used as a support as described above and spaced apart, the thinned material 6 is made of H-shaped steel at both ends as shown in FIG. 1, FIG. 2, FIG. 3, FIG. The steel support material 5 is stacked while being fitted into the groove-like portion 4 of the steel support material 5. As shown in FIGS. 2 to 4, the downstream side mold apparatus 3 is assembled in the same manner, and then the vertical butter material 21 is placed back and forth (see FIG. 4) on the outer surface side of each mold apparatus 2, 3. The front and rear vertical butterflies 21 are connected to each other via a separator 24 and a connecting member 30.
As shown in FIGS. 1, 2, 10, and 12, the vertical butter member 21 is integrated by welding and fixing two groove steels 22 of the same length on both sides of the spacing member 23 back to back. Structure. Further, in this embodiment, a leaf spring 26 described later is welded and fixed to the back side (the thinned material 6 side) of the vertical butter material 21.
The separator 24 has a structure in which screws 24a are formed at both ends and a retaining member 24b is provided in the vicinity thereof. The connecting member 30 is formed with a screw hole 30a screwed into the screw portion 24a of the separator 24 on the distal end side, a screw 30b formed on the proximal end side, and a nut 32 screwed on the screw hole 30a. This is a structure provided with a hook 30c.

When the vertical butterfly members 21 arranged outside the opposing formwork apparatuses 2 and 3 are connected to each other by the separator 24 and the connecting member 30, a hole 31 a formed in the plate 31 at the tip side of the connecting member 30 (see FIG. 12). , Through the insertion hole 6a provided at a predetermined position of the thinned material 6 and turning the spanner hook 30c with a spanner to screw the screw hole 30a of the connecting member 30 into the screw portion 24a at the end of the separator 24. Screw in until the appropriate length. The insertion hole 6a provided in the thinned material 6 is a notch-shaped insertion hole in the embodiment, but may be a closed cylindrical hole.
Next, as the nut 32 is screwed in, the plate 31 becomes a washer and presses the butterwood 21 against the thinning material 6. At this time, the thinning material 6 is pressed against the back side in the groove-shaped portion 4 of the steel support material 5. It is done. As a result, the front and rear butter materials 21 are connected by the separator 24 and the connecting member 30.

In this embodiment, as shown in FIGS. 10 (a), 10 (b), and 11, a large number of leaf springs 26, which are elastic members for absorbing gaps, are welded and fixed to the back side of the vertical butter material 21. Each leaf spring 26 has a shape in which a strip-like elongated plate is bent at an acute angle in the vicinity of the center, and its tip is folded back inward, and is fixed to each channel steel 22 of the vertical butter material 21 so as to have an acute angle upward. To do.
Thinned wood 6 Especially thinned wood that is not peeled bark is uneven in thickness, and thinned wood is thinner on the top side than the root side, so it is thinned in the groove 4 of the steel support 5 The gap between the lumber 6 and the flange tends to be non-uniform, but the leaf spring 26 presses the individual thinning material 6 to the rear side, so that both ends of the thinning material 6 are grooved in the steel support material 5. It is pressed against the rear flange in the portion 4, and therefore, even if there is an irregularity in the outer diameter of the thinned material 6, the irregularity is absorbed, and as a formwork surface by the thinned material 6 (surface that forms the outer surface of the concrete frame) A mold surface without unevenness is formed.
Note that the gap absorbing elastic member may be an elastic band-shaped single piece made of rubber, urethane, or the like.

As described above, the civil engineering structure building form apparatus 1 including the pair of form forming apparatuses 2 and 3 facing each other is assembled. After assembly, the concrete is placed inside. In addition, before placing concrete, as shown in FIG. 2, the sheet | seat 33 is stretched on the inner surface side of the formwork apparatuses 2 and 3 on both sides. Therefore, the concrete does not directly contact the thinned material 6 and the thinned material 6 is not integrally coupled with the concrete frame itself.
After the concrete is hardened, the vertical flap 21 is removed. When the connecting member 30 is turned with a spanner applied to the spanner hook 30c and removed from the screw portion 24a at the end of the separator 24, the connecting member 30 can be removed and the vertical butter material 21 can be removed. The steel support material 5 has a nut / anchor 19 attached to the back side of the steel support member 5 with a bolt 18 embedded in the concrete case to function as an anchor, so that the steel support material 5 is secured to the concrete case.
In addition, when the height of the civil engineering structure to be constructed is low, the entire formwork can be formed and concrete can be placed at once. However, when the height is high, the formwork and concrete are formed. Placing can be performed in multiple steps. For example, the first concrete placement is up to the position of the two-dot chain line a in FIGS. 3 and 4, and after the concrete is hardened, in the portion above the hardened concrete of the steel support material 5 in the front and rear formwork devices 2 and 3, The thinned material 6 is stacked in substantially the same manner as described above, and the vertical butter material 21 is attached in the same manner as described above using the separator 24 and the connecting member 30, and concrete is placed. This process is repeated to form a civil engineering structure having a desired height.
Moreover, the steel support material 5 itself can also add the part on it, every time it places concrete.

The civil engineering structure constructed as described above is generally a civil engineering structure 35 as shown in FIG. Since the exposed outer wall is made of thinned wood 6, the civil engineering structure 35 is good in terms of scenery, but generally, wood is corroded over time, so it may be necessary to replace it after 10 years, for example. . According to the formwork apparatus 1 for constructing a civil engineering structure of the present invention, in such a case, the corroded thinned material can be easily replaced with a new thinned material.
The thinning material replacement procedure will be described with reference to FIGS. 5 to 7 and the like. First, the second support material piece 12 from the bottom is removed. In this case, when the upper and lower bolts 18 of the support material piece 12 are turned in the loosening direction and are extracted from the respective nuts and anchors 19, the support material piece 12 faces the front and lower support material pieces 11, 13 (FIG. 5). The leftward movement is not constrained and can be removed to the front side as indicated by arrows (A) in FIGS.
Since each thinned material 6 is stacked with both ends fitted into the groove 4 of the steel support material 5 and there is no special restraint, when the intermediate support material piece 12 is removed, the upper side The thinned wood 6 is dropped and discharged one after another from the part from which the support material pieces 12 are removed. Therefore, unlike the conventional structure, each thinned material is pulled up from the upper end of the steel support material and must be taken out individually, so that the corroded thinned material can be taken out very easily and efficiently.
When all of the upper thinning material 6 is not taken out by this method, it is preferable that the thinning material 6 staying as necessary is manually dropped by the operator. After all the thinned wood 6 has been taken out, the support material pieces 12 previously removed are set in their original positions, and the bolts 18 are screwed onto the nuts and anchors 19 at the upper and lower portions of the support material pieces 12 and tightened. It is fixed to the support material pieces 11 and 13 and becomes the steel support material 5 in the original state again. Therefore, the replacement work of the corroded thinning material 6 can be completed by sequentially inserting and stacking new thinning materials 6 from the upper end of the steel support material 5. In this way, the replacement work of the corroded thinned material becomes extremely easy.

  In addition, in the above, after carrying out the fall stop treatment so that the thinning material 6 above the portion of the support material piece 12 does not fall, the support material piece 12 is removed, and only the thinning material 6 of that portion is taken out. A method of dropping the remaining thinned wood 6 part by part from the lower part may be used.

It is also conceivable that even if one support material piece 12 is removed, all of the thinning material 6 does not fall. In this case, the operator manually drops the remaining thinning material 6 or removes the support material pieces 13, 14, 15 above the support material piece 12 that has been removed first, and then leaves the remaining thinning material 6. It is good to take out.
In the latter case, after the support material piece 12 is removed, the upper bolt 18 of the support material piece 13 thereon is turned in the loosening direction and pulled out from the nut / anchor 19 so that the support material piece 13 is moved diagonally downward and forward. It can be removed by pulling it down. Alternatively, the support material piece 13 may be removed after the upper bolt 18 of the upper support material piece 14 is removed. When the bolt 18 at the upper part of the support material piece 14 is extracted, the uppermost support material piece 15 can also be removed.

In the embodiment divided into the above-mentioned five support material pieces, the two support material pieces 12 and 14 can be removed independently, but only one support material piece may be removable. In that case, it is optimal to make it possible to remove the second support material piece 12 from the bottom in order to facilitate the discharge of the thinned material.
In short, the steel support material may be divided into at least three support material pieces and a part of the support material pieces may be detached in the front direction alone.

As described above, since the steel support material 5 is divided into a plurality of support material pieces and at least a part of the support material pieces can be removed, the thinned material corroded after construction is taken out from the steel support material. Can be repaired with new thinned wood.

In addition, when using the thinned material 6 with the log as the thinned material as in the embodiment, the formwork surface formed by the thinned material 6 becomes an uneven formwork surface, as shown in FIG. The finished surface of the concrete is an uneven surface along the cross-sectional shape of the thinned material 6. Reference numeral 37 denotes concrete. Then, when thinning material replacement is performed, when removing the intermediate supporting material piece 12 and dropping the thinning material 6 above it, the thinning material 6 may not be smoothly dropped due to the unevenness of the concrete finish surface. Conceivable. Further, when the new thinned material 6 is inserted into the groove 4 of the steel support material 5 from the upper end, the thinned material 6 may not slide smoothly downward.
In that case, as shown in FIG. 14 (b), it is preferable to place a template 38 made of corrugated paper or thin plywood on the back of the stacked thinned material 6 and to cast concrete. Thereby, a flat surface with few unevenness | corrugations can be obtained as a concrete finish surface, and discharge | emission of the existing thinning material 6 and insertion of the new thinning material 6 can be performed smoothly at the time of thinning material replacement | exchange.

Moreover, in the above-mentioned Example, the thinned material 6 with the log remaining as a thinned material was used. However, the thinned material 6 of the log divided into two semicircular sections (divided pieces) may be used.
In this case, the divided pieces having a semicircular cross section can be stacked such that the back surface (semicircular surface) faces the back surface. When thinning materials (segment pieces having a semicircular cross section) are stacked in this manner, a formwork surface is formed by a flat cut surface, so that a flat surface with less unevenness can be obtained as a concrete finished surface.

Although the embodiment described above is a formwork apparatus for constructing a dam type civil engineering structure, the formwork apparatus composed of only one of the above-described one-side formwork apparatuses 2 and 3 is used as a formwork apparatus for constructing a retaining wall. Can be used.
In addition, it is appropriate to use H-shaped steel for the steel support material 5, but it is also possible to use a back-to-back groove-shaped steel or the like, as long as the cross-sectional shape has groove-shaped portions on both sides. In addition, naturally the steel support material of the width direction edge part of a formwork apparatus may have a groove-shaped part only in one side.

It is a front view of the principal part of the formwork apparatus for civil engineering structure construction of one Example of this invention. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is CC sectional drawing of FIG. It is a side view of the steel support material part in the upstream one-side formwork apparatus. It is the figure which decomposed | disassembled and showed a part of steel support material in FIG. It is the perspective view which showed only the lower three support material pieces in FIG. FIG. 7 is a perspective view in which three support material pieces in FIG. 6 are vertically arranged. It is an expansion perspective view of the anchor in FIG. FIG. 2 shows one butter material in FIG. 1, (A) is a rear view, and (B) is a left side view of (A). It is a figure explaining the use condition of the elastic member for clearance absorption in the butter material shown in FIG. It is a disassembled perspective view of the principal part of the above-mentioned formwork apparatus for civil engineering structure construction. It is sectional drawing of the civil engineering structure constructed | assembled using said formwork apparatus for civil engineering structure construction. It is explanatory drawing about the Example which arrange | positions a template on the back of thinned timber, (A) is principal part sectional drawing explaining the inconvenience when not arrange | positioning a template, (B) is essential in the case where a template is arranged FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Formwork apparatus 2 for construction of civil engineering structures 3, Formwork apparatus 4 for one side Groove-shaped part 5 Steel support material 6 Thinning material 6a Insertion hole 8 Base beam 9 Connecting metal fittings 11, 12, 13, 14, 15 Support material piece 11a, 12a, 13a Front flanges 11b, 12b, 13b Webs 11c, 12c, 13c Rear flange 11d Fastening member insertion holes 16, 17 Pipe 18 Bolt (fastening member)
19 Nut and Anchor 21 Vertical Batter 22 Groove Steel 23 Spacing Material 24 Separator 26 Leaf Spring (Elastic Member for Gap Absorption)
30 connecting member 31 plate

Claims (13)

A plurality of steel support members having groove portions on both side surfaces are provided at intervals, and a large number of thinned woods are placed between the left and right steel support materials while inserting both ends thereof into the groove portions. A formwork device for constructing a civil structure that is formed by stacking,
The steel support material is divided into at least three support material pieces in the vertical direction, and the support material pieces adjacent to each other in the vertical direction are joined to each other by a fastening member and a part of the support material pieces that are not the lowermost part. Is a formwork device for construction of civil engineering structures, which has a shape that can be removed in the front direction with respect to the support material pieces adjacent to the upper and lower sides.   The support material pieces adjacent to each other in the vertical direction have overlapping portions that overlap each other when viewed from the front-rear direction, and are joined to each other by the fastening members inserted from the front side through the fastening member insertion holes provided in the overlapping portions of both. The formwork apparatus for construction of civil engineering structure according to claim 1 characterized by the above-mentioned. Each of the support material pieces is made of H-shaped steel, and the support material pieces that can be removed in the front direction are such that the upper and lower ends of the front flange extend vertically with respect to the web and the upper and lower ends of the rear flange are formed on the web. On the other hand, the shape is retracted up and down,
The support material piece adjacent to the upper side of the removable support material piece has at least the lower end portion of the front flange retracted upward relative to the web and the lower end portion of the rear flange extended downward relative to the web. Shape,
The support material piece adjacent to the lower side of the removable support material piece has a shape in which the upper end of the front flange is retracted downward with respect to the web and the upper end of the rear flange extends upward with respect to the web. And
3. The formwork apparatus for construction of civil engineering structure according to claim 2, wherein the support material pieces adjacent to each other in the vertical direction are in contact with each other at the front and rear flanges and webs and are continuous in the vertical direction.   A pipe is joined to the web end of one support material piece in the upper and lower adjacent support material pieces, and a fastening member insertion hole is made in the flange in accordance with the hole of the pipe, corresponding to the pipe of the flange of the other support material piece. The fastening member insertion hole was drilled at the position, and the upper and lower support material pieces were fastened by the fastening member that passed through the fastening member insertion hole of the front flange, the pipe, and the fastening member insertion hole of the rear flange from the front side. The formwork apparatus for civil engineering structure construction according to claim 3.   5. The construction for civil engineering structure according to claim 4, wherein the fastening member is a bolt, and a nut is screwed onto the bolt on the back side of the rear flange to fasten the upper and lower support material pieces. Formwork device.   6. The formwork apparatus for civil engineering structure construction according to claim 5, wherein a nut and anchor formed integrally with an anchor material embedded in a concrete frame is used as the nut.   The formwork apparatus for civil engineering structure construction according to claim 6, wherein the nut and anchor is configured by forming a screw hole in a tip surface of a rod-shaped anchor material.   The formwork apparatus for civil engineering structure construction according to claim 1, wherein the thickness of the thinned material is uneven.   The formwork apparatus for constructing a civil engineering structure according to claim 1, wherein the thinned material is used while the bark remains as the thinned material. A formwork device for construction of a civil engineering structure used when constructing a dam type civil engineering structure having exposed outer wall surfaces on both sides,
A formwork apparatus for constructing a civil structure, wherein a pair of one-side formwork apparatuses having the structure of the formwork apparatus for constructing a civil structure according to claim 1 are arranged to face each other.   A separator in which the vertical butterfly material is arranged to face each other on the outer surface side of the pair of one-side formwork devices, and the front and back vertical flap materials are inserted through the insertion holes provided in the thinning material before and after, respectively. The formwork apparatus for civil engineering structure construction according to claim 10, which is connected.   On the back side of the vertical butter material, an elastic member for absorbing gaps that elastically presses the thinned material whose ends are inserted into the groove-shaped portion of the steel support material to the rear side in the groove-shaped portion, the longitudinal direction of the vertical butter material The formwork apparatus for constructing a civil engineering structure according to claim 10 or 11, wherein the formwork apparatus is attached along the line.   The formwork device for civil engineering structure construction according to claim 1, wherein a template is installed on a back surface of the stacked thinned materials.

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