Construction device for concrete structures

Abstract

The present invention provides a concrete structure construction device that can pour new concrete so that it adheres closely to the joint surface of the previously poured concrete (hereinafter referred to as the old concrete) after it has hardened, without removing formwork that has been installed to prevent the concrete from flowing out of the surface that will become the vertical joint, and without performing joint processing such as roughening the joint surface of the old concrete. [Solution] This is a construction device for a concrete structure that is integrated into an approximately L-shape by a vertically rising concrete structure and a horizontally extending concrete structure that bends at approximately a right angle from the bottom of the vertically rising concrete structure and extends horizontally, and is characterized by the use of a floating formwork with a gap at the boundary between the bottom of the vertically rising concrete structure to be constructed and the tip of the horizontally extending concrete structure that bends at approximately a right angle from the bottom and extends horizontally.

Description

Technical Field

[0001] The present invention relates to a construction device for concrete structures.

Background Art

[0002] When constructing a concrete structure such as a wall rising vertically in the vertical direction to be long in the horizontal direction, adjacent formworks are framed vertically with a gap corresponding to the thickness, concrete is poured into the framed formworks, and after the concrete hardens, the formworks are removed to construct a concrete structure that continues long in the horizontal direction such as a wall.

[0003] Here, conventionally, when constructing a wall or the like that forms a long wall surface in the horizontal direction as described above, it has been considered to frame a formwork that is continuously connected in the entire long horizontal direction, pour concrete into this formwork, and construct a concrete structure.

[0004] However, in order to frame a formwork that is continuously connected in the entire long horizontal direction and pour concrete into this formwork, a device that can generate and store an amount of concrete that can be placed at one time on site is required. This is because the concrete must be poured into the already framed formwork all at once, and if the concrete is poured at different times, it will cause deterioration of the concrete.

[0005] Therefore, when the concrete cannot be poured into the formwork all at once, for example, the concrete pouring space is provided by partitioning at predetermined positions in the horizontal direction, the formwork is installed in the block to pour the concrete, then the formwork is installed in the next block to pour the concrete, and the concrete poured in the previous block and the concrete poured in the next block are connected at the joint part to construct a long concrete structure in the horizontal direction.

[0006] That is, a stop formwork serving as a vertical joint is installed at the end face portion that becomes the thickness part of the concrete placed between the formworks installed in the vertical direction, and the concrete is poured into the formwork installed in the block thus partitioned to partially construct a concrete structure. Next, a new block is provided in the horizontal direction and a formwork is installed, and the concrete is poured into the formwork to construct a new part of the concrete structure, which is connected to the concrete structure of the previously constructed part, thus constructing a concrete structure such as a horizontally continuous concrete wall.

[0007] However, in such a conventional construction device, as described above, a stop formwork for partitioning the outflow of concrete must be installed on the surface that becomes the vertical joint. After the previously poured concrete (hereinafter referred to as old concrete) has hardened, the stop formwork is removed, and joint treatment such as roughening the joint surface of the old concrete is performed, and the new concrete (hereinafter referred to as new concrete) must be poured so as to be in close contact with the joint surface subjected to the joint treatment and compacted.

[0008] Also, when constructing a concrete structure, reinforcing bars are pre-arranged in the formwork and then concrete is poured. However, even at the location of the vertical joint, the work of arranging the reinforcing bars must be carried out. Depending on the work of arranging the reinforcing bars at this vertical joint location, the installation and removal of the stop formwork and the joint treatment of the old concrete become complicated and require a great deal of labor.

[0009] And in some cases, methods such as using a wire mesh or the like on the stop formwork or attaching a resin sheet with unevenness to simplify the joint treatment, or using a removable spacer plate or air hose after arranging the reinforcing bars and installing and removing them as a substitute for the stop formwork have been tried. However, it is impossible to completely close the gap between the new concrete and the inserted bars, and there are problems such as a deterioration in the quality of the joint surface due to the outflow of concrete from the gap and the labor required to process the outflowed concrete.

[0010] Next, in order to form a concrete structure that integrates a conventional floor (slab base) and rising concrete members (walls, columns, etc.), there is also a demand for solving the problems of a foundation integrated casting construction device for a concrete structure using a so-called floating formwork. In a construction device for a concrete structure using the floating formwork, the concrete driven in as a rising concrete member may spout out toward the floor side.

[0011] Therefore, conventionally, in order not to overflow beyond the designed thickness of the floor, while checking the properties of the concrete, the rising concrete member had to be carefully driven in over time and compacted.

[0012] However, when using a floating formwork, there are problems such that compaction tends to be insufficient due to the carefulness of driving in the rising concrete member, leading to poor concrete driving, or cold joints occurring due to spending too much time. Here, a method of improving the placing property and shortening the time by using flowing concrete can be considered, but the possibility of concrete overflowing increases, and currently, the application of flowing concrete is also difficult.

Prior Art Documents

Patent Documents

[0013]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0014] Thus, the present invention was devised to solve the above-described conventional problems. In a construction apparatus for a horizontally continuous concrete structure of a type in which the construction of a concrete structure is not completed by a single placement of concrete and the concrete blocks to be placed are divided into a plurality of pieces, after the previously placed concrete (hereinafter referred to as old concrete) has hardened, without removing the formwork (hereinafter referred to as the stop formwork) installed to prevent the outflow of concrete on the surface that will become the vertical joint portion, and without performing joint treatment such as roughening the joint surface of the old concrete, new concrete (hereinafter referred to as new concrete) can be placed so as to be in close contact with the joint surface. Furthermore, even with the reinforcement bar arrangement at the location of the vertical joint portion, the installation and removal of the stop formwork and the joint treatment of the old concrete are not complicated and do not require a great deal of labor, and there is no deterioration in the quality of the joint surface due to the outflow of concrete from the gap and no need to deal with the outflowed concrete. The present invention also aims to provide a construction apparatus for a concrete structure in which, when constructing a concrete structure using a so-called floating formwork to integrate the floor (slab / base) and the rising concrete members (walls, columns, etc.), the concrete placed as the rising concrete members does not spout out to the floor side and does not overflow above the designed thickness of the floor. While checking the properties of the concrete, the rising concrete members are carefully placed over time without the need for tamping, and when using a floating formwork, there is no risk of insufficient tamping due to the careful placement of the rising concrete members, which may lead to poor placement, or the occurrence of cold joints due to excessive time consumption.

Means for Solving the Problems

[0015] The present invention is A construction device for a concrete structure integrally formed in a substantially L shape by a vertically rising concrete structure and a laterally extending concrete structure that bends at a substantially right angle from the lower part of the vertically rising concrete structure and extends laterally. It is a construction device that uses a floating formwork with a gap at the boundary between the lower part of the vertically rising concrete structure to be constructed and the tip of the laterally extending concrete structure that bends at a substantially right angle from the lower part and extends laterally. In the gap, Embedded type of sound deadening made of concrete members a closing plate, The and a connecting bar inserted and attached to the closing plate are provided, and the connecting bar One side is is configured to be connectable to a Horizontal reinforcing bar arranged at the construction location of the laterally extending concrete structure. And is configured such that The connecting bar The other side is configured to intersect with the longitudinal reinforcing bars arranged at the construction location of the longitudinally extending concrete structure, The concrete for constructing the longitudinally extending concrete structure driven from above the floating formwork and the concrete for constructing the laterally extending concrete structure driven at the construction location of the laterally extending concrete structure are in close contact with the closing plate having both side surfaces formed as rough surfaces, and a substantially L-shaped concrete structure integrated through the closing plate and connecting bars penetrating the closing plate and intersecting with the longitudinal reinforcing bars can be constructed. This is characterized by or, A construction device for a concrete structure integrally formed in a substantially L shape by a vertically rising concrete structure and a laterally extending concrete structure that bends at a substantially right angle from the lower part of the vertically rising concrete structure and extends laterally. It is a construction device that uses a floating formwork with a gap at the boundary between the lower part of the vertically rising concrete structure to be constructed and the tip of the laterally extending concrete structure that bends at a substantially right angle from the lower part and extends laterally. In the gap, a buried member for closing the gap is installed. The buried member is configured to be integrally formed by connecting a plurality of closing plate blocks divided in the vertical direction in the vertical direction. The joint part of the closing plate blocks can be used as a spacer for the horizontal reinforcing bars arranged at the construction location of the laterally extending concrete structure, and through holes through which the horizontal reinforcing bars are inserted are formed. And the other side of the lateral reinforcing bar is configured to intersect with the longitudinal reinforcing bars arranged at the construction location of the longitudinally extending concrete structure, The concrete for constructing the longitudinally extending concrete structure driven from above the floating formwork and the concrete for constructing the laterally extending concrete structure driven at the construction location of the laterally extending concrete structure are in close contact with the closing plate composed of a plurality of the closing plate blocks having both side surfaces formed as rough surfaces, and a substantially L-shaped concrete structure integrated through the closing plate and lateral reinforcing bars penetrating the closing plate and intersecting with the longitudinal reinforcing bars can be constructed. This is characterized by the above.

Advantages of the Invention

[0016] According to the present invention, in an apparatus for constructing a horizontally continuous concrete structure of a type in which construction is not completed by a single concrete placement and the concrete blocks to be placed are divided into a plurality of pieces, after the previously placed concrete (hereinafter referred to as old concrete) has hardened, without removing the formwork (hereinafter referred to as the stop formwork) installed to prevent the outflow of concrete on the surface that will become the vertical joint, and without performing joint treatment such as roughening the joint surface of the old concrete, new concrete (hereinafter referred to as new concrete) can be placed so as to be in close contact with the joint surface. Further, even with the reinforcement of the vertical joint, the installation and removal of the stop formwork and the joint treatment of the old concrete are not complicated and do not require much labor, and there is an excellent effect that the quality of the joint surface due to the outflow of concrete from the gap and the labor of treating the outflowed concrete do not occur. Also, in order to integrate the floor (slab / base) and the rising concrete members (walls, columns, etc.), in the construction of a concrete structure using a so-called floating formwork, the concrete placed as the rising concrete member does not spout to the floor side and does not overflow beyond the designed thickness of the floor. Therefore, it is not necessary to carefully place and compact the rising concrete member over time while checking the properties of the concrete. When using a floating formwork, there is an excellent effect that insufficient compaction does not easily occur due to the careful placement of the rising concrete member, which may cause poor placement, and cold joints do not occur due to excessive time consumption.

Brief Description of the Drawings

[0017]

Figure 1

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Mode for Carrying Out the Invention

[0018] Hereinafter, the present invention will be described based on the embodiments shown in the drawings. In this embodiment, a plurality of concrete driving spaces 15 are partitioned in the horizontal direction, and concrete can be driven for each partitioned driving space 15. A connecting member is provided on the contact surface of the concrete driven for each driving space 15 to construct a horizontally continuous concrete structure. It is a construction device, It includes a vertical formwork 6 installed at intervals on the front and back surfaces of the driving space 15, vertical and horizontal reinforcing bars 4 arranged in the intervals, and an embedded member installed on the contact surface of the driving spaces 15 adjacent to each other in the horizontal direction. The embedded member has a vertical joint filling member 1 as a closing plate and a connecting bar 2 inserted and attached to the vertical joint filling member 1. The vertical joint filling member 1 is configured as a plate-shaped member having a substantially rectangular shape to close the contact surface of the driving space 15, and both surface portions are configured as rough surfaces 14. The connecting bar 2 and the horizontal reinforcing bar 4 are configured to be connectable. Concrete is driven into the driving spaces 15 adjacent to each other in the horizontal direction, and the adjacent concretes are integrated through the embedded member.

[0019] Figure 1 is an explanatory diagram for explaining the configuration of an apparatus for constructing a horizontally continuous concrete structure by a type in which, in one concrete placement of the first embodiment of the present invention, the construction of the structure is not completed, and the concrete placement space 15 for the concrete to be placed is divided into a plurality of parts and the concrete is placed.

[0020] Reference numeral 13 is a formwork device for dividing the concrete placement space 15 into a plurality of parts in the horizontal direction when constructing a horizontally continuous concrete structure and placing concrete for each of the divided placement spaces 15. Reference numeral 1 is a vertical joint filling member installed on the contact surface of the concrete, which is a vertical joint for connecting the concrete placed in the placement space 15 in the horizontal direction within the formwork device 13.

[0021] The vertical joint filling member 1 is manufactured in accordance with the contact surface, that is, the height and width of the vertical joint, and is formed of a substantially rectangular plate-like member. This vertical joint filling member 1 is formed in a substantially rectangular plate shape as described above by, for example, precast concrete members at a factory in advance and has a predetermined thickness. Both side surface portions of the vertical joint filling member 1 are formed into a substantially uneven rough surface 14 in order to improve the adhesion with the concrete to be placed hereinafter.

[0022] Here, regarding the formation of the rough surface 14, the vertical joint filling member 1 having a substantially rectangular plate shape is surrounded by a formwork, but the inner surface of the formwork is made into an uneven surface in advance so that both side surface portions of the vertical joint filling member 1 completed after demolding become the rough surface 14.

[0023] Even when not using a formwork having an inner surface formed on the uneven surface, by attaching, for example, a sheet member configured as a rough surface 14 to the vertical joint filling member 1 whose both surfaces have become smooth surfaces by the formwork, it can be formed on both surfaces of the rough surface 14. In any case, it is important to perform a reliable joint process by making both side surface portions of the vertical joint filling member 1, for example, the rough surface 14 (see Fig. 4).

[0024] Next, as shown in Fig. 2, a plurality of connecting bars 2 having protruding portions extending outward from both side surface portions are inserted and attached to the vertical joint filling member 1 so as to penetrate the vertical joint filling member 1.

[0025] That is, as understood from Fig. 1, concrete is driven from, for example, the left driving space 15 where the vertical joint filling member 1 is installed in Fig. 1. At this time, a plurality of reinforcing bars 4 are arranged in the vertical and horizontal directions inside the left driving space 15. And at the vertical joint portion, the vertical joint filling member 1 to be embedded as it is is installed, and at a location where the connecting bar 4 can be connected to the reinforcing bar 4 arranged in the horizontal direction, that is, the connecting bar 4 is attached in the longitudinal extension direction of the reinforcing bar 4. And a plurality of reinforcing bars 4 arranged in the horizontal direction and the protruding portions of the connecting bars 2 can be connected.

[0026] There is no limitation on the connecting method, but as shown in Fig. 2, it may be connected as a lap joint, or may be connected as a mechanical joint using a coupler 5 or the like.

[0027] In addition, in Fig. 1, the driving space 15 on the right side of the vertical joint filling member 1 is a location where concrete is to be driven next. Similarly, reinforcing bars 4 are arranged in this driving space 15, and a plurality of reinforcing bars 4 arranged in the horizontal direction and the protruding portions of the connecting bars 2 are similarly connected. Also, in Fig. 1, reference numeral 6 is a vertical formwork installed on the front and back surface sides of the driving space 15.

[0028] In the above, Fig. 5 shows the construction process of the first embodiment. First, the vertical joint filling and killing member 1 through which a plurality of connecting bars 2 are inserted is installed at a predetermined position within the formwork device 13, that is, at the lateral connecting surface of adjacent driving spaces 15, that is, at the contact surface where the concrete driven into adjacent driving spaces 15 contacts, that is, at the vertical joint. Next, a plurality of connecting bars 2 inserted and attached to the vertical joint filling and killing member 1 are connected to the reinforcing bars 4 arranged horizontally within the formwork device 13.

[0029] Thereafter, concrete is driven into the left driving space 15. Next, concrete is driven into the right driving space 15, and this construction process is sequentially repeated to construct a horizontally continuous concrete structure.

[0030] The reason for having to adopt the above construction method will be explained again. That is, a horizontally continuous concrete structure is surrounded by a large formwork device 13, and the amount of concrete that can be driven all at once within the formwork device 13 cannot be generated at once, and there is no place to store it.

[0031] There is a limit to generating and storing at the construction site the amount of concrete that can be driven all at once within a large formwork device 13. The amount of concrete to be driven into the large formwork device 13 for constructing a horizontally continuous concrete structure must be generated and stored separately in a plurality of portions at different times.

[0032] Therefore, the concrete driving space 15 is divided into a plurality of portions horizontally, concrete is driven into each divided driving space 15, and the contact surfaces of adjacent driving spaces 15 are connected to construct a large horizontally continuous concrete structure.

[0033] However, arranging the stop formwork on the contact surface, i.e., the vertical joint part, and demolding it as in the prior art is extremely laborious and costly. This is the reason for the invention of the first embodiment.

[0034] Here, the schematic configuration of the invention of the first embodiment will be described. It is made using a formwork with a thickness that fits between the longitudinal reinforcing bars 4 arranged parallel to the vertical joint surface, i.e., in the vertical direction, according to the dimensions (height and width) of the vertical joint part. For example, a resin sheet with an uneven surface is pasted. Thus, a buried member for filling the vertical joint part is prepared in advance at a factory or the like by passing a connecting bar 2 through a concrete slab for the vertical joint part where a rough surface 14 is formed on the surface in contact with the new and old concrete and the joint treatment is performed, and then attaching it.

[0035] Then, before arranging the reinforcing bars 4, the buried member is installed so that the buried member for filling the vertical joint part 1 made of a concrete slab is located at the vertical joint part. After that, the formwork device 13 is assembled with a vertical formwork 6, reinforcing bars 4, etc., and the horizontal reinforcing bars 4 and the connecting bar 2 are connected.

[0036] That is, the buried member for filling the vertical joint part 1 made of a concrete slab in the buried member is used as a stop formwork in the divided driving space 15. However, the buried member is buried without being removed, and new concrete is driven into the next driving space 15. That is, the buried member for filling the vertical joint part 1 is left buried to integrate the old concrete, the buried member for filling the vertical joint part 1, and the new concrete.

[0037] In addition, by precasting the vertical joint part as the buried member, the vertical joint part, which conventionally had only one joint treatment surface, becomes two joint treatment surfaces on both surface parts of the buried member for filling the vertical joint part 1. The rough surface 14 is formed on the joint treatment surfaces of both surface parts, and reliable joint treatment is performed, ensuring firm integration.

[0038] In addition, since the embedded member can be embedded without being removed, complicated processes (such as removal and joint treatment of stop forms) can be omitted. Furthermore, since a vertical joint part is prefabricated as the embedded member, new concrete can be immediately poured, and a shortening of the construction period can be expected.

[0039] Also, the connection with the reinforcing bar 4 is made by arranging the connecting bar 2 to penetrate through the vertical joint part filling and killing member 1 so as to serve as a cross bar for both the new and old concretes during the production of the embedded member, that is, during the production of the precast vertical joint part. In this way, an embedded member without gaps, that is, an embedded member that does not allow the old concrete to flow into the pouring space 15 where the new concrete is poured, is obtained.

[0040] As described above, in this embodiment, when constructing a horizontally continuous concrete structure, by dividing the pouring space in the horizontal direction, an embedded member produced on site or in a precast factory, that is, a precast vertical joint part, is installed at the vertical joint part where a stop form had to be provided. After assembling the formwork device 13 such as the vertical form 6 and the reinforcing bar 4, concrete is poured into the pouring space 15.

[0041] In the conventional method, after pouring the old concrete, after the concrete has hardened and sufficient strength has been developed, the stop form installed at the vertical joint part is removed, and the new concrete cannot be poured until the joint treatment of the vertical joint part in the old concrete is completed, and there is a concern about a long construction period. However, in this embodiment, it is possible to pour the new concrete at the shortest time, even the day after pouring the old concrete.

[0042] Next, a second embodiment of the present invention will be described. This embodiment is a construction device for a concrete structure that is integrally formed in a substantially L shape by a concrete structure rising in the vertical direction and a laterally extending concrete structure that bends at a substantially right angle from the lower part of the concrete structure rising in the vertical direction and extends in the horizontal direction.

[0043] And it is a construction device that uses a floating formwork 7 in which a gap is provided at the boundary between the lower part of a vertically rising concrete structure to be constructed and the tip of a laterally extending concrete structure that bends at a substantially right angle from the lower part and extends horizontally.

[0044] An embedding member having a closing plate that closes the gap, that is, a filling and closing plate 8, and a connecting bar 2 inserted and attached to the filling and closing plate 8 is attached to the gap, and the connecting bar 2 is configured to be connectable to a lateral reinforcing bar 4 arranged at the construction location of the laterally extending concrete structure.

[0045] Further, the embedding member is configured to be integratable by connecting a plurality of closing plate horizontal blocks 9 divided in the vertical direction in the vertical direction, and the joint portion of the closing plate horizontal blocks 9 can be used as a spacer for the lateral reinforcing bar 4 arranged at the construction location of the laterally extending concrete structure, and is configured to be able to form an insertion hole through which the lateral reinforcing bar 4 is inserted.

[0046] FIG. 6 is an explanatory view showing the configuration of the second embodiment, and is a view for explaining the construction of a concrete structure using a so-called floating formwork 7 in order to integrate a rising concrete member (such as a wall or a column), which is a vertically rising concrete structure, and a floor (slab / base), which is a laterally extending concrete structure, in a substantially L shape.

[0047] As shown in FIG. 6, for example, concrete is poured from above the floating formwork 7 installed for wall formation. Then, conventionally, as shown in FIG. 11, when the pouring speed of the concrete is fast, a large amount of concrete flows out from the gap below the floating formwork 7 to the floor surface portion. Then, the concrete overflows above the floor surface portion.

[0048] Also, as shown in FIG. 12, conversely, when the pouring speed of the concrete is slow, a discontinuous surface 16 is generated at the concrete pouring location. Therefore, in this embodiment, an embedding member is installed to fill the gap below the floating formwork 7 in order to solve the above problems. That is, the embedding member is used at the boundary between a horizontally long floor (slab / base) and a rising concrete member (wall, column, etc.), and is configured to fill the gap with a filling and closing plate 8 having a horizontally long rectangular plate shape.

[0049] However, when the horizontal lengths of the floor (slab / base) and the rising concrete member (wall, column, etc.) continuously constructed in the horizontal direction are long, the filling and closing plate 8 may be configured by connecting a plurality of closing plate horizontal blocks 9 in the horizontal direction (see Fig. 8).

[0050] Here, the embedding member is manufactured in a factory in advance, and the filling and closing plate 8 or the closing plate horizontal block 9 is formed in a substantially rectangular shape and has a predetermined thickness by, for example, a precast concrete member. In addition, both side surface portions of the filling and closing plate 8 or the closing plate horizontal block 9 are formed with a rough surface 14 in order to improve the adhesion with the concrete to be driven in. And the formation method of the rough surface 14 is substantially the same as that in the first embodiment.

[0051] Also, as can be understood from Fig. 9, when concrete is driven into the floor surface, the reinforcing bars 4 must be arranged. However, the closing plate horizontal block 9 of this embodiment can also be used as a spacer for the reinforcing bars 4. As shown in Fig. 9, the closing plate horizontal block 9 can be configured to be dividable in the vertical direction. That is, as shown in Fig. 9(b), the first closing plate vertical block 10 is configured as a block with a low height, and the reinforcing bars 4 can be placed on its upper surface.

[0052] Then, the relatively high second closing plate vertical block 11 is overlapped on the first closing plate vertical block 10 and held so as to sandwich the reinforcing bars 4 (see Fig. 9(c)). Next, place the second reinforcing rib 4 on top of the second closing plate vertical block 11, stack the third closing plate vertical block 12 on top of it, and sandwich the second reinforcing rib 4 (see Fig. 9(d)).

[0053] In this way, the closing plate horizontal block 9 of this embodiment prevents the concrete poured from above the floating formwork 7 from flowing into the floor surface area, and also functions as a spacer for holding the reinforcing rib 4.

[0054] Incidentally, as shown in Fig. 9(a), the connecting bar 2 may be inserted and attached to the buried closing plate 8 in advance in a direction substantially perpendicular to the longitudinal direction of the buried closing plate 8, and the connecting bar 2 may be connected to the reinforcing rib 4 in the same type as in the first embodiment. The connection method in this case is the same as that described in the first embodiment.

[0055] Incidentally, for example, each of the first closing plate vertical block 10, the second closing plate vertical block 11, and the third closing plate vertical block 12 constituting the buried closing plate 8 or the closing plate horizontal block 9 of this embodiment may also be formed in advance at a factory by a precast concrete member or the like in the same manner as the vertical joint buried member 1 described in the first embodiment, as described above.

[0056] By the way, the vertical joint buried member 1 of the first embodiment may also be configured as a split block that can be split in the vertical direction. After sandwiching the reinforcing rib 4, the split blocks may be connected and integrated to form a buried member. In such a case, it is not necessary to insert and attach the connecting bar 2 to the vertical joint buried member 1.

[0057] Here, in this embodiment, first, concrete is poured from above the floating formwork 7 to construct a wall. However, the poured concrete is blocked from flowing into the floor surface area by the integral plate of the buried closing plate 8 or the closing plate horizontal block 9 serving as a weir plate. Therefore, a strong wall can be produced regardless of the pouring speed of the concrete.

[0058] Next, concrete is driven in from above the floor surface portion. Since the concrete is driven in from above the floor surface portion, there is no risk of the concrete driven into the upper part of the floor surface, which was a conventional problem, overflowing to the floor surface side or creating a discontinuous surface in the driven concrete.

[0059] Moreover, the embedded member having the buried type closing plate 8 or the closing plate cross block 9 as described above is, for example, prefabricated in a factory in advance, has good adhesion to the concrete driven in from above the floating formwork 7 or above the floor surface portion, and can produce a substantially L-shaped concrete structure having a firmly integrated floor (slab base) and rising concrete members (walls, columns, etc.). As a result, the durability of the structure is further improved.

[0060] For example, when constructing the upper cross girder of a bridge, in order to ensure strong integrity with the lower floor slab of the box girder, the construction using the floating formwork 7 is adopted. However, since the cross girder has insertion bars from the lower works and has over-dense reinforcement, careful tamping had to be carried out during driving.

[0061] However, in this embodiment, a precast vertical joint member (embedded member) is installed in the gap at the location where the floating formwork 7 between the cross girder and the lower floor slab of the box girder is installed, and an integrated buried closing plate 8 or closing plate cross block 9 is used as a weir plate, and the construction of the cross girder and the lower floor slab of the box girder is temporarily separated. As a result, careful tamping of the concrete driven into the cross girder with over-dense reinforcement can be carried out, and the application of high-fluidity concrete to the cross girder is also possible.

Explanation of Signs

[0062] 1 Vertical joint buried member 2 Connecting bars 3 Protruding part 4 Reinforcing bars 5 Couplers 6 Vertical formwork 7 Floating formwork 8 Buried closing plate 9 Closing plate cross block 10 First closing plate vertical block 11 Second closing plate vertical block 12 Third closing plate vertical block 13 Formwork device 14 Rough surface 15 Driving space

Claims

1. A construction device for a concrete structure integrally formed in a substantially L-shape by a vertically rising concrete structure and a laterally extending concrete structure that bends at a substantially right angle from the lower part of the vertically rising concrete structure and extends horizontally. The construction device uses a floating formwork with a gap at the boundary between the lower part of the vertically rising concrete structure to be constructed and the tip of the laterally extending concrete structure that bends at a substantially right angle from the lower part and extends horizontally. In the gap, an embedded type filling and closing plate made of a concrete member that closes the gap and a connecting bar inserted and attached to the closing plate are provided. One side of the connecting bar is configured to be connectable to a horizontal reinforcing bar arranged at the construction location of the laterally extending concrete structure, and the other side of the connecting bar is configured to intersect a vertical reinforcing bar arranged at the construction location of the vertically extending concrete structure. The concrete for constructing the vertically extending concrete structure driven in from above the floating formwork and the concrete for constructing the laterally extending concrete structure driven in at the construction location of the laterally extending concrete structure adhere closely to the closing plate with both side surfaces formed as rough surfaces, and a substantially L-shaped concrete structure integrated through the closing plate and the connecting bar inserted through the closing plate and intersecting the vertical reinforcing bar can be constructed. A construction device for a concrete structure, characterized in that.

2. A construction device for a concrete structure integrally formed in a substantially L-shape by a vertically rising concrete structure and a laterally extending concrete structure that bends at a substantially right angle from the lower part of the vertically rising concrete structure and extends horizontally. The construction device uses a floating formwork with a gap at the boundary between the lower part of the vertically rising concrete structure to be constructed and the tip of the laterally extending concrete structure that bends at a substantially right angle from the lower part and extends horizontally. In the gap, an embedded member for closing the gap is installed. The embedded member is configured to be integrally formed by connecting a plurality of closing plate blocks divided in the vertical direction in the vertical direction. The joint part of the closing plate blocks can be used as a spacer for the horizontal reinforcing bars arranged at the construction location of the laterally extending concrete structure, and insertion holes through which the horizontal reinforcing bars are inserted are formed. The other side of the horizontal reinforcing bar is configured to intersect a vertical reinforcing bar arranged at the construction location of the vertically extending concrete structure. The concrete for constructing the vertically extending concrete structure driven in from above the floating formwork and the concrete for constructing the horizontally extending concrete structure driven in at the construction location of the horizontally extending concrete structure are in close contact with the closed plate composed of the plurality of closed plate blocks having both side surfaces formed as rough surfaces, penetrate the closed plate, and can construct a substantially L-shaped concrete structure integrated via the horizontal reinforcing bars intersecting with the vertical reinforcing bars. A construction device for a concrete structure, characterized by the above.

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