JPH10227024A - Concrete structure constructing formwork device and concrete structure constructing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide such a formwork device as being capable of easily adjusting a molding formwork in horizontal in a short time to mold a concrete wail face, and a concrete structure constructing method. SOLUTION: A concrete structure constructing formwork device 100 has C-bolts 1 connected to at least two of plural anchor bolts embedded in an existing concrete structure at preset spaces in the cross direction, a connection beam 2 mounted on the C-bolts 1, level jacks 3 provided at both ends of the connection beam 2 in a vertically adjustable manner, a molding formwork 4 to mold a concrete wall face carried on the level jacks 3 and plural terminal materials 5 provided with insertion-holes to be freely engaged/disengaged with/ from and fixed to the C-bolts 1, extended upward and downward to the outside of the molding form 4 and fixed thereto at preset spaces in the horizontal direction. With the vertical adjustment of the level jacks 3, the horizontal degree of the molding formwork 4 is adjusted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a dam, a sabo dam,
Formwork equipment for concrete product construction used when constructing concrete structures such as waterways and slopes, and a method of constructing concrete structures by continuously casting concrete layers using the equipment It is.

[0002]

2. Description of the Related Art Conventionally, as a structure forming form used when constructing a concrete structure such as a dam, various types are known, and among them, as shown in FIGS. A plurality of horizontal members 119 arranged at intervals in the vertical direction over the outside of the upper half of the plurality of vertical members 118 arranged at intervals in the left-right direction are fixed by welding or the like. The formwork 120 is secured over the inside of the upper half of
Is fixed over the lower end of each longitudinal member 118, a jack bolt 123 is screwed into a female screw member 122 attached to a lower part of each longitudinal member 118, and a sea bolt 101 is inserted into an intermediate portion of each longitudinal member 118. In general, a structural mold 125 having a structure in which a dummy bolt is inserted into the upper part of each vertical member 118 and tightened with a nut or the like, and a hanging fitting 124 is fixed to the upper end of each vertical member 118. Are known.

[0003] That is, as a working process of this type of structure forming mold 125, a concrete crane cast inside the mold 120 is hardened and then a cable crane or a simple crane carried into a mold transfer place. After engaging a plurality of lifting hooks with the hanging metal fittings 124 and supporting the structure forming form 125 by the crane, the worker gets on the work platform 121 and tightens the sea bolts 101 and the dummy bolts 102. The nut or the like is turned in the loosening direction to separate from the anchor bolt 127, and is turned in the direction in which the jack bolt 123 is stretched to separate from the lower concrete from the lower concrete 128. Pull up to concrete placement position. Then, with the structure forming mold 125 suspended in the air, a horizontal position is determined by using a measuring instrument or the like, and an operator adjusts the position of the structure forming mold 125 along the horizontal position. Subsequently, the worker tightens the suspended structure forming form 125 to the sea bolt 101 screwed to the anchor bolt 127 embedded in the existing concrete layer.
Thereafter, the above-described operation steps are repeated to construct the concrete structure.

[0004]

However, since the structure forming form 125 is large and heavy (about 800 kilograms), it is very difficult for the worker to quickly and horizontally install it, and the work time is delayed. Had become a cause. When the structure forming mold 125 is released from the hardened concrete layer, as described above, the structure forming form 125 is supported by a wire rope or the like of a cable crane or the like, and then tightened by the sea bolt 101. However, there is a problem in that, at this time, the looseness of the wire rope falls at a stretch due to the weight of the structure forming mold 125, which is extremely dangerous for an operator working in the vicinity. Further, since the cable crane is required until the structure forming form 125 is securely lifted and fixed, the cable crane cannot perform other work or the like during that time, so that the work time is delayed and there is much waste economically. There was a problem.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and a problem to be solved is to solve the above-mentioned problems of the conventional structural formwork. It is an object of the present invention to provide a concrete structure construction form apparatus and a construction method for constructing a concrete structure, which can easily and horizontally adjust a molding form for molding a concrete.

[0006]

Means for Solving the Problems To solve the above,
Means adopted by each of the present invention will be described with reference numerals used in the embodiments. First, the invention according to claim 1 is:
A sea bolt 1 connected to at least two of a plurality of anchor bolts buried in the existing concrete structure at predetermined intervals in the lateral direction, a connecting girder 2 spanning the sea bolt 1, and both ends of the connecting girder 2 A level jack 3 which can be adjusted up and down, a molding frame 4 for molding a concrete wall surface carried on the level jack 3, and an insertion hole 12 which can be inserted into and removed from the sea bolt 1. And a plurality of vertical end members 5 extending vertically to the outside of the molding form and fixed at predetermined intervals in the horizontal direction. Thus, the levelness of the molding die 4 is adjusted by adjusting the vertical movement of the level jack 3.

Next, the concrete structure forming apparatus 100 according to the second aspect of the present invention provides a concrete structure forming form apparatus 100 according to the first aspect of the present invention. An anchor bolt embedding dummy bolt 6 detachably and fixedly attached to an upper end portion, and a vertical end member inclination adjusting jack bolt 7 detachably and fixably attached to a lower end portion of the vertical end member 5. And was provided.

Next, the invention according to claim 3 is characterized in that at least two of the plurality of anchor bolts buried in the existing concrete structure with a space therebetween in the lateral direction are provided with the sea bolt 1.
Fixing the seam 1, mounting the connecting girder 2 provided with the level jack 3 on the seabolt 1 after fixing the seabolt 1, and forming the connecting girder 2 on the seabolt 1 and then forming A step of supporting the forming form 4 on the level jack 3 and inserting and fixing the sea bolt 1 into an insertion hole 12 provided in the vertical end member 5; and attaching the forming form 4 to the level jack 3. A step of adjusting the horizontality of the molding form 4 by vertically adjusting the level jack 3 after inserting and fixing the sea bolt 1 in an insertion hole 12 provided in the vertical end member 5 while carrying the same; After adjusting the level of the molding form 4, concrete is poured inside the molding form 4, and after the concrete is cured and hardened, the concrete structure construction form apparatus 100. Demolding, and pulling up the concrete structure forming form device 100 to the next concrete pouring position via the elevating means. The above steps are sequentially repeated to continuously cast a concrete layer. To construct concrete structures.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a formwork apparatus for constructing a concrete structure and a method of constructing a concrete structure according to the present invention will be described in more detail with reference to examples. This is an example, and the present invention is not limited by the following examples unless it exceeds the gist of the present invention.

As shown in FIGS. 1 and 2, a concrete structure forming apparatus 100 according to an embodiment of the present invention includes a plurality of anchors embedded in an existing concrete structure 30 at predetermined intervals in a lateral direction. At least two of the bolts 31
A sea bolt 1 to be fixed to a book, a connecting girder 2 erected on the sear bolt 1, a level jack 3 provided at both ends of the connecting girder 2, which can be adjusted up and down, and a concrete wall surface carried on the level jack 3 are formed. For forming 4
And an insertion hole 12 that can be inserted into and removed from the sea bolt 1
A plurality of vertical end members 5 extending in the vertical direction toward the outside of the forming mold frame 4 and fixed at predetermined intervals in the horizontal direction, and foldable at the lower end of the vertical end members 5. It is basically configured by the work scaffold 32.

The sea bolt 1 is screwed and fastened to a plurality of anchor bolts 31 continuously embedded in the existing concrete structure 30 at predetermined intervals in the lateral direction, and has a generally known shape. belongs to. The sea bolt 1 is tightened to at least two of the plurality of anchor bolts 31, and the connecting girder 2 is installed on the sea bolt 1.

As shown in FIGS. 1 and 3, the connecting girder 2 is formed in an L-shape by a steel material or the like having a constant cross-sectional shape. Has an insertion hole 12 through which the seabolt 1 is inserted. One of the insertion holes 12 is formed in an elliptical shape that is wide in the horizontal direction. This makes it possible to cope with a case where there is a slight difference in the interval between the sea bolts 1 that are continuously tightened in the existing concrete layer at predetermined intervals in the lateral direction. A surface projecting perpendicularly from the upper edge of the surface abutting the existing concrete surface is formed, and a level jack 3 to be described later is screwed to both ends of the surface so that the vertical position can be adjusted. A level jack rotation hole 13 is provided.

As shown in FIGS. 3 and 4, the level jacks 3 are screwed into level jack rotating holes 13 formed at both ends of the connecting beam 2 so as to be vertically movable. Each of the level jacks 3 carries a molding form 4 to be described later. The shape of the level jack 3 is formed in a screw shape, and a molding frame 4 is formed at an upper end thereof.
The holding portion 14 is formed in a further shape so as to be able to hold the sheet. At the lower end of the level jack 3, an engagement portion 15 formed in a quadrangular shape is formed, and a generally well-known ratchet wrench is engaged with the engagement portion 15 and rotated to rotate the level jack. 3 is configured to adjust the vertical position. This makes it possible to adjust the molding form 4 horizontally.

The molding frame 4 includes a concrete wall forming plate 16 made of a material such as wood and formed in a rectangular shape, and a vertical supporting member fixed to the left and right ends of the concrete wall forming plate 16 at predetermined intervals. It is composed of a member 17 and a plurality of horizontal support members 18 fixed between the vertical support members 17 at predetermined intervals and orthogonal to the vertical support members 17. An anchor bolt embedding dummy bolt 6, which is detachably and fixably attached from a position near the upper end of the vertical end member 5, is inserted into a hole formed in the concrete wall forming plate 16 and is embedded in the existing concrete layer. It is inserted into the anchor bolt 31. Therefore, the hole for inserting the dummy bolt 6 can be easily processed by using wood as the material of the concrete wall forming plate 16. However, the material is not limited to wood or the like, and for example, a concrete wall molding plate molded from a well-known metal foam or synthetic resin material can be exemplified. In addition, a hanging bracket 19 is provided at an upper end portion of the molding frame 4.

The vertical end members 5 are formed by welding a pair of U-shaped steel members with a plate or the like so as to face each other back to back with an interval for inserting a seabolt or the like. . Accordingly, a place where a later-described seabolt or the like is inserted / removed can be freely set, so that it is possible to cope with any change in work conditions. The plurality of vertical end members 5 arranged at predetermined intervals in the vertical direction are fixed to the forming mold 4 over the inside of the upper half.

The vertical end member 5 includes a dummy bolt 6 for embedding an anchor bolt which is removably and fixedly attached to a position near the upper end thereof, and a vertical end member which is located below the forming frame 4 and is lower than the forming die frame 4. An anchor bolt which can be inserted and removed and fixed at a substantially intermediate portion of the anchor member 5, and an inclination adjustment of the vertical end member 5 which is attached to the lower end portion of the vertical end member 5 so as to be detachable and fixable. Jack bolt 7 and vertical scrap 5
Is provided with a work platform 32 which can be folded at the lower end.

The work scaffold 32 is, as shown in FIG.
It is supported on the side of the vertical end member 5 near the lower end so that the fixed position can be adjusted, and is configured to be changeable according to the work content.

Next, a method of constructing a concrete structure using the concrete structure constructing formwork apparatus 100 having the above-described configuration will be described.

First, as shown in FIGS. 1 and 2,
A plurality of anchor bolts 31 buried in the existing concrete structure 30 at predetermined intervals in the horizontal direction are provided with sea bolts 1.
Is fixed.

Next, the connecting girder 2 provided with the level jacks 3 at both ends is inserted into the respective insertion holes 12 formed at both ends thereof.
Into the seabolt 1 so as to be installed.

Next, a plurality of lifting hooks of a cable crane or the like or a simple crane carried to the transfer point of the mold are engaged with the hanging fitting 19 provided on the forming mold 4 by engaging with the hanging fitting 19. After the mold 4 is lifted by the above method, it is placed on the level jack 3 so as to be supported by the level jack 3 as shown in FIGS. It is arranged so that it can be inserted through. At this time, the horizontality is measured with a measuring instrument or the like to determine the horizontal position. Then, the ratchet wrench is engaged with the lower ends of the level jacks 3 provided at both ends of the connecting girder 2 and rotated to adjust the horizontal position of the molding form 4. Further, since the molding form 4 is placed so as to be carried on the level jack, there is no need to work while being suspended by the crane or the like when adjusting the horizontal position. Can be used for other work, so that work time can be reduced and it is economically effective.

Next, the washer 20 is passed through the seabolt or the like, and the nut 21 is screwed to such an extent that the nut 21 is not tightened. Then, the jack bolts 7 inserted and fixed to the vertical end members 5 are rotated, and the inclination of each vertical end member 5 is adjusted so that the concrete construction surface of the molding form 4 is on the same straight line as the existing concrete layer surface. Is adjusted, the nut 21 is tightened.

As described above, concrete is cast inside the concrete structure construction apparatus 100 installed on the existing concrete layer.

After the cast concrete has cured and hardened, the hanging hook 19 is engaged with a lifting hook of a cable crane. Loosen any nuts that are present. At this time, since the forming mold 4 and each vertical end member 5 are supported by the level jack 3, the looseness of the wire rope drops at a stretch due to the weight of the forming mold 4, and the work in the vicinity is performed. It prevents personnel from getting injured.

Subsequently, the worker turns the sea bolt 1 or the like in the loosening direction to separate it from the anchor bolt 31 and separates it from the lower concrete and raises it with the cable crane or the like to the next upper concrete construction scheduled surface. . Then, the above-described operation is repeated to build a concrete structure so that the concrete layers can be sequentially stacked from the bottom.

As described above, the concrete structure construction apparatus 100 according to the present embodiment includes the sea bolt 1 connected to at least two of the plurality of anchor bolts, the connection girder 2 installed on the sea bolt 1, and the connection Up and down adjustable level jacks 3 provided at both ends of the girder 2, a molding form 4 for molding a concrete wall surface carried on the level jack 3, and an insertable / removable / fixable insert to / from the seabolt 1. And a plurality of vertical end members 5 which are provided with holes 12 and extend in the vertical direction toward the outside of the molding frame and are fixed at predetermined intervals in the horizontal direction.

Therefore, by adjusting the vertical position of each level jack 3, the horizontality of the molding frame 4 can be easily adjusted. Further, since the molding form 4 is placed so as to be supported by the level jack 3,
Even when adjusting the level, there is no need to work while suspended with a cable crane or the like, and the crane etc. can be used for other work. It can be used effectively.
Further, in the operation of removing the concrete structure construction apparatus 100 after the cast concrete has cured and hardened, the worker engages the lifting hook of the cable crane with the hanging metal fitting 19, and then the worker operates the work platform 32. Even when the nut or the like fastened to the sea bolt 1 and the dummy bolt 6 is loosened, the molding frame 4 and each vertical end member 5 are supported by the level jack 3. It is possible to prevent the looseness of the wire rope from dropping at a stretch due to the weight, and prevent the worker working in the vicinity from being injured. In addition, in this embodiment, since the material of the concrete wall forming plate 16 constituting the forming frame 4 is made of wood, it is possible to easily process the hole through which the dummy bolt 6 is inserted.

In this embodiment, a method of constructing a concrete structure using one concrete formwork apparatus 100 according to the present invention has been described. It is obvious that even when constructing a large concrete structure using a plurality of the same, it is possible to obtain substantially the same operation and effect as described above,
The above description is cited.

[0029]

As described in detail above, according to the first aspect of the present invention, as exemplified in the above embodiment, this formwork apparatus for constructing a concrete structure includes a forming formwork for forming a concrete wall surface. Can be easily and horizontally adjusted in a short time, and the use time of a cable crane or the like used for installation and removal of a structural form can be shortened and the safety of workers can be improved. It is effective.

According to a second aspect of the present invention, by using the concrete structure-forming formwork apparatus according to the first aspect of the present invention, a forming formwork for forming a concrete wall surface can be easily and horizontally placed in a short time. The present invention has an excellent effect of being able to adjust, reduce the use time of a cable crane or the like used for installing and removing the structural formwork, and improve the safety of workers.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a formwork device for constructing a concrete structure.

FIG. 2 is a longitudinal sectional side view showing an embodiment of a formwork apparatus for constructing a concrete structure.

FIG. 3 is a front view showing an embodiment of a connecting girder provided with a level jack constituting a formwork apparatus for constructing a concrete structure.

FIG. 4 is a partially enlarged longitudinal side view showing an embodiment of a formwork apparatus for constructing a concrete structure.

FIG. 5 is a vertical sectional side view showing a use state of a conventional structure forming mold.

FIG. 6 is a front view showing a use state of a conventional structure forming mold.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 Formwork apparatus for construction of concrete structure 1 Seabolt 2 Connecting girder 3 Level jack 4 Forming form 5 Vertical end material 6 Dummy bolt 7 Jackbolt 12 Insertion hole 13 Level jack rotation hole 14 Holding part 15 Engagement part 16 Concrete Wall forming plate 17 Longitudinal support member 18 Lateral support member 19 Hanging fitting 20 Washer 30 Existing concrete structure 31 Anchor bolt 32 Work scaffold

Claims (3)

[Claims] 1. A sea bolt connected to at least two of a plurality of anchor bolts buried at a predetermined interval in a lateral direction in an existing concrete structure; a connecting girder erected on the sea bolt; Up and down adjustable level jacks provided at both ends, a molding form for molding a concrete wall surface carried on the level jack, and an insertion hole which can be inserted into and removed from the sea bolt and can be fixed, and And a plurality of vertical end members extending vertically and fixed at predetermined intervals in the horizontal direction outside of the forming mold, and adjusting the vertical movement of the level jack to adjust the level of the forming mold. A formwork apparatus for concrete structure construction characterized by adjusting. 2. The vertical end member has a dummy bolt for embedding an anchor bolt detachably and fixedly attached to an upper end thereof, and a lower end of the vertical end member is detachably and fixedly attached. 2. The formwork device for constructing a concrete structure according to claim 1, further comprising a jack bolt for adjusting the inclination of the vertical scrap. 3. A step of connecting the sea bolt to at least two of a plurality of anchor bolts buried in an existing concrete structure with a space therebetween in a lateral direction, and the level jack is provided after fixing the sea bolt. Erection of the connecting girder on the seabolt, and after supporting the connecting girder on the sievebolt, supporting the molding form by the level jack and inserting the searing into the insertion hole provided in the vertical end member. And fixing the molding form by supporting the molding frame on the level jack and inserting and fixing the sea bolts in the insertion holes provided in the vertical end member, and then adjusting the level jack up and down. A step of adjusting the levelness of the molding form; and, after adjusting the levelness of the molding form, concrete inside the molding form. Casting and concrete, after curing and curing the concrete, demolding the concrete structure construction form device, and pulling up the concrete structure construction form device to the next concrete placement position via lifting means. And constructing a concrete structure by continuously laying a concrete layer by sequentially repeating the above steps.