JP6740064B2 - Construction method of concrete frame - Google Patents

Description

The present invention relates to a method for constructing a concrete skeleton using a reverse winding method.

Generally, a wall-shaped or columnar concrete skeleton is constructed from the bottom to the top by a forward winding method. This is because it is more rational to stack members and materials for constructing a concrete skeleton, such as supporting work installation, formwork installation, and concrete placing, from bottom to top.

On the other hand, for the construction of side walls (side wall concrete) of cylindrical underground structures such as vertical shafts and underground tanks, etc., it is possible to use mountain retaining that does not require support work such as cutting beams. It may be advantageous to build it by In this case, the sidewall concrete can function as a support work. In the reverse winding method, for example, after constructing a mountain retaining board using a steel sheet pile or a SMW method, the ground in the area surrounded by the mountain retaining station is dug down for about 3 to 5 m to pour sidewall concrete. To do. By repeating the excavation of the ground and the placement of the sidewall concrete, the sidewall concrete having a desired height can be constructed.

In an example of this sidewall concrete construction method, first, the sidewall concrete to be constructed is vertically divided into a plurality of lots. Next, the top lot is constructed by pouring concrete so as to be adjacent to the side of the Yamadome. Next, the floor formwork and the side formwork are installed below the uppermost lot. Here, a hopper (concrete input port) is provided at an upper portion of the side formwork so as to be located at a side of a lower end portion of the uppermost lot. Next, concrete is poured from the hopper into the space surrounded by the lower surface of the uppermost lot, the mountain clasp, the floor formwork, and the side formwork. In this way, sidewall concrete can be constructed by placing concrete in each lot in order from top to bottom and constructing each lot sequentially. In this regard, Patent Document 1 describes that concrete is poured from the hopper into the space surrounded by the mountain dome, the floor formwork, and the side formwork.

Japanese Patent Laid-Open No. 07-139160

However, if the concrete is poured through the hopper as described above, it is necessary to remove the hopper after the strength of the concrete has developed, and at the place where the hopper has been removed, the hopper overhangs and is hardened. The concrete must be crushed and flattened for surface finish. Therefore, it took time and effort to construct the side wall concrete.

In view of such an actual situation, the present invention aims to efficiently construct a wall-shaped or columnar concrete skeleton.

Therefore, in the method for constructing a concrete skeleton according to the first to fourth aspects of the present invention , the concrete skeleton to be constructed is divided into a plurality of lots in the vertical direction, and the molds are rearranged in order from top to bottom. This is a method of constructing a concrete skeleton by placing concrete. This method for constructing a concrete skeleton comprises a first step of arranging a first tubular member extending vertically for concrete placing work in a space surrounded by an inner surface of a first lot construction mold, and a first lot construction. It includes a second step of constructing the first lot by placing concrete in a space surrounded by the inner surface of the mold for use for molding, and a third step of removing the formwork for constructing the first lot. The first tubular member connects the upper side of the first lot and the lower side of the first lot.
In the first aspect, the first lid member, which is a cap that closes the lower surface opening of the first tubular member, is placed in the first tubular member before the concrete is placed in the first lot building mold in the second step. And removing the first lot construction formwork in the third step, and then removing the first lid member from the first tubular member.
In the said 2nd aspect, the through-hole is formed in the floor formwork which comprises the 1st lot construction formwork, and the lower end part of a 1st tubular member is a 1st lot construction formwork in a 1st process. Penetrate through the through holes in the floor formwork.
In the third aspect, in the method for constructing the concrete skeleton, after removing the first lot construction formwork in the third step, the upper end of a new tubular member is connected to the lower end of the first tubular member. Thus, the fourth step of extending the first tubular member downward, and the second lot construction formwork is installed below the first lot, and the second lot construction formwork is installed in the space surrounded by the inner surface of the second lot construction formwork. (1) A fifth step of locating the extension of the tubular member, and a second lot is constructed by placing concrete in a space surrounded by the inner surface of the second lot construction mold and the lower surface of the first lot. The method further includes 6 steps and a 7th step of removing the second lot construction formwork, and the first tubular member and the extension thereof communicate between the upper side of the first lot and the lower side of the second lot.
In the fourth aspect, in the method for constructing a concrete skeleton, a fourth step is to install a second lot building mold below the first lot after removing the first lot building mold in the third step. And a fifth step of constructing a second lot by placing concrete in a space surrounded by the inner surface of the second lot constructing mold and the lower surface of the first lot, and a second lot constructing mold. And a sixth step of removing.

According to the present invention, the first tubular member connects the upper side and the lower side of the first lot. Accordingly, the first tubular member can be used for placing concrete in a new lot that is adjacently constructed below the first lot, and thus the above-mentioned hopper is unnecessary. Therefore, since the side formwork can have a flat shape without a hopper, a normal flat formwork can be used. Further, since the hopper is not required, the above-mentioned extra concrete scrubbing work and surface finishing work can be omitted, so that the concrete skeleton can be efficiently constructed.

The partial top view of the underground structure in 1st Embodiment of this invention. The figure which shows the construction method of the side wall of the underground structure in embodiment same as the above. The figure which shows the construction method of the side wall of the underground structure in embodiment same as the above. The figure which shows the construction method of the side wall of the underground structure in embodiment same as the above. The figure which shows the construction method of the side wall of the underground structure in embodiment same as the above. The figure which shows the construction method of the side wall of the underground structure in embodiment same as the above. The figure which shows the construction method of the side wall of the underground structure in embodiment same as the above. The figure which shows the construction method of the side wall of the underground structure in embodiment same as the above. The figure which shows the construction method of the side wall of the underground structure in embodiment same as the above. The figure which shows the construction method of the side wall of the underground structure in embodiment same as the above. The figure which shows the construction method of the side wall of the underground structure in embodiment same as the above. The figure which shows the construction method of the side wall of the underground structure in embodiment same as the above. The figure which shows the construction method of the partition wall of the underground structure in embodiment same as the above. The figure which shows the construction method of the partition wall of the underground structure in embodiment same as the above. The figure which shows the construction method of the partition wall of the underground structure in embodiment same as the above. The figure which shows the construction method of the partition wall of the underground structure in embodiment same as the above. The figure which shows the construction method of the partition wall of the underground structure in embodiment same as the above. The figure which shows the construction method of the partition wall of the underground structure in embodiment same as the above. The figure which shows the construction method of the partition wall of the underground structure in embodiment same as the above. The figure which shows the construction method of the partition wall of the underground structure in embodiment same as the above. The figure which shows the construction method of the partition wall of the underground structure in embodiment same as the above. The figure which shows the construction method of the partition wall of the underground structure in embodiment same as the above. The figure which shows the concrete pouring pipe inserted in the sheath pipe for concrete pouring in embodiment same as the above. The figure which shows the arrangement|positioning state of the vibrator in embodiment same as the above. The figure which shows the pouring method of the concrete in an embodiment same as the above. The figure which shows the pouring method of the concrete in an embodiment same as the above. The figure which shows the construction method of the side wall of the conventional underground structure The figure which shows the construction method of the side wall of the underground structure in 2nd Embodiment of this invention. The figure which shows the construction method of the side wall of the underground structure in embodiment same as the above. The figure which shows the construction method of the partition wall of the underground structure in embodiment same as the above. The figure which shows the construction method of the partition wall of the underground structure in embodiment same as the above.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a partial top view of an underground structure according to the first embodiment of the present invention. In addition, in FIG. 1, illustration of the upper end portions of the sheath pipes 81, 82 for concrete pouring and the upper end portions of the sheath pipes 91, 92 for vibrators, which will be described later, is omitted.
In the present embodiment, the front, rear, left and right are defined as shown in FIG. 1 and will be described below.

The underground structure 1 has a pair of left and right side walls 2 and 3, a partition wall 4 located between the side walls 2 and 3, and a bottom portion 5, and the upper surface is open. Here, each of the side walls 2 and 3 and the partition wall 4 corresponds to the "concrete skeleton" of the present invention. That is, regarding the side walls 2 and 3 and the middle partition wall 4, each of the side walls 2 and 3 and the middle partition wall 4 to be constructed is divided into a plurality of lots in the vertical direction, and the lots are sequentially modeled from top to bottom. By refilling the frame and placing concrete, the side walls 2 and 3 and the intermediate partition wall 4, which are concrete skeletons, are constructed. In addition, in this embodiment, the side walls 2 and 3 and the partition wall 4 to be constructed are each divided into three lots in the vertical direction, but it may be divided into two lots or four lots. It may be divided into any number of lots described above. The height of one lot (length in the vertical direction) is about 3 to 5 m.

A mountain retainer 6 is constructed on the left side of the left side wall 2, and the side wall 2 and the mountain retainer 6 are in surface contact with each other and integrated. A mountain retaining member 7 is constructed on the right side of the right side wall 3, and the side wall 3 and the mountain retaining member 7 are in surface contact with each other and integrated. The vertical length of the ridges 6, 7 is longer than the vertical length of the side walls 2, 3. In other words, the lower ends of the mountain stays 6 and 7 are located below the lower ends of the side walls 2 and 3 (see FIG. 12A described later).

A space 8 surrounded by the side wall 2, the partition wall 4, and the bottom portion 5 is located below the ground 10. A space 9 surrounded by the side wall 3, the partition wall 4, and the bottom portion 5 is located below the ground 10.

Next, a method for constructing the right side wall 3 will be described with reference to FIGS. 2 to 12 are views showing a method of constructing the side wall 3. Here, FIG. 2 and FIG. 3A correspond to the AA cross section of FIG. 1 and correspond to the installation position of the support pile 12 described later. FIGS. 4A to 12A correspond to the BB cross section of FIG. 1 and correspond to the installation position of the sheath pipe 82 for concrete pouring described later. FIGS. 3B to 12B correspond to the C-C cross section of FIG. 1. 4(a) to 12(a), for simplification of illustration, illustration of a support pile 12 described later is omitted. 4(b) to 12(b), the hanging steel members 14, 14a, 14b, which will be described later, are omitted for simplification of the drawing.

In the method of constructing the side wall 3 in the present embodiment, first, the side wall 3 to be constructed is divided into three vertical lots (first lot 31, second lot 32, and third lot 33) (FIG. 12 described later). (See (a)).
Yamadome 6 and 7 are built on the ground 11. Here, FIG. 2 shows the right mountain stay 7 built on the ground 11.

Next, as shown in FIGS. 3(a) and 3(b), the ground 11a between the mountain retention points 6 and 7 is dug down by several meters. This digging depth is larger than the vertical length of the first lot 31.
Further, as shown in FIGS. 3A and 3B, a plurality of support piles 12 are installed on the left side of the mountain stay 7 at intervals in the front-rear direction. The support pile 12 supports the first lot 31, the second lot 32, and the third lot 33. Note that the support pile 12 may be installed before the construction of the mountain stays 6 and 7, or after the above-mentioned ground 11a is dug down.

Next, a member (not shown) such as a stud bolt for integrating with the first lot 31 is attached to the left side surface of the exposed portion of the mountain stay 7 and the outer peripheral surface of the support pile 12.
Next, the main rebars (longitudinal rebars and horizontal rebars) and the shear reinforcing rebars (both not shown) that form the first lot 31 are installed. These reinforcing bars may be directly or indirectly attached to the support pile 12 and supported by the support pile 12, for example.

Next, as shown in FIG. 4A, a plurality of suspended steel members 14 each extending in the vertical direction are installed. The suspended steel material 14 is, for example, a Gebinde (registered trademark) steel rod. The upper end of the suspended steel material 14 is supported by the support pile 12.

Next, as shown in FIGS. 4A and 4B, the first lot construction mold 50 is installed so as to surround the construction planned region of the first lot 31 together with the yamadome 7.
The first lot construction mold 50 is composed of a plate-shaped floor mold 51 extending in the front-rear direction and a plate-shaped side part mold 52 extending in the front-rear direction.

The floor formwork 51 is a hanging formwork that is hung by the above-mentioned hanging steel material 14. The floor form 51 is detachably fixed to the suspended steel material 14 via a fixture 53.
The right end of the floor form 51 is in contact with the mountain retainer 7, and the floor form 51 is inclined so as to move upward toward the left side. At the left end of the floor form 51, an embedded anchor (not shown) for connecting to the lower end of the side form 52 is provided.

The side frame 52 is installed at a distance from the mountain retainer 7 so that the right side surface thereof faces the left side surface of the exposed portion of the mountain retainer 7. The side form 52 is fixed to the left end of the floor form 51 at its lower end via the embedded anchor described above.

Next, as shown in FIGS. 4(a) and 4(b), the concrete placing sheath pipes 81 and 82 and the vibrator sheath pipes 91 and 92 are provided between the side mold 52 and the mountain retaining rod 7. Install in the center position of. Here, each of the sheathing pipes 81, 82 for concrete pouring and the sheathing pipes 91, 92 for vibrators corresponds to the "first tubular member for concrete pouring work" of the present invention, and the vertical direction. Extends to. The lower ends of the concrete placing sheath pipes 81 and 82 and the vibrator sheath pipes 91 and 92 are located near the upper surface of the floor form 51.

In constructing the side wall 3, the concrete placing sheath tube 81 and the vibrator sheath tube 91 are used for concrete placing work when constructing the second lot 32. The sheath pipe 82 for concrete pouring and the sheath pipe 92 for vibrator are used for concrete pouring work when constructing the third lot 33.
In the present embodiment, the diameters of the concrete placing sheath pipes 81 and 82 are 250 mm, and the diameters of the vibrator sheath pipes 91 and 92 are 100 mm, but the diameter of each sheath pipe is not limited to these.

In the present embodiment, the plurality of sheathing pipes 81 for concrete pouring are arranged in a row in the front-rear direction at intervals of, for example, 5 m. Between the adjacent concrete pouring sheath pipes 81, three vibrator sheath pipes 91 are arranged in a line in the front-rear direction at intervals of, for example, 1.25 m.

In the present embodiment, the plurality of sheathing pipes 82 for concrete pouring are arranged in one row in the front-rear direction at intervals of, for example, 5 m. Between the adjacent concrete placing sheath pipes 82, three vibrator sheath pipes 92 are arranged in a line in the front-rear direction at intervals of, for example, 1.25 m.

The sheathing pipes 81, 82 for concrete pouring and the sheathing pipes 91, 92 for vibrators can be directly or indirectly attached to, for example, the main rebar and supported by the main rebar.
A first lid member (not shown) such as a cap is detachably attached to the concrete placing sheath pipes 81 and 82 and the vibrator sheath pipes 91 and 92 so as to close the respective lower surface openings. .. The first lid member may be attached to the floor mold 51 so as to be detachable integrally with the floor mold 51.

Therefore, a space partitioned (enclosed) by the left side surface of the exposed portion of the mountain stay 7 and the inner surface of the first lot construction mold 50 (the upper surface of the floor mold 51 and the right surface of the side mold 52). Inside, a main reinforcing bar, a shear reinforcing reinforcing bar, a suspended steel material 14, concrete placing sheath tubes 81 and 82, and vibrator sheath tubes 91 and 92 are arranged.

In the present embodiment, the concrete placing sheath pipes 81, 82 and the vibrator sheath pipes 91, 92 are installed after the first lot construction form 50 is installed, but instead of this, concrete placing The first lot construction form 50 may be installed after the sheath tubes 81 and 82 for vibration and the sheath tubes 91 and 92 for vibrators are installed.

Next, the left side surface of the exposed portion of the mountain stay 7, the inner surface of the first lot building formwork 50 (the upper surface of the floor formwork 51 and the right side surface of the side formwork 52), and the concrete pouring sheath pipe 81. , 82 outer surface (outer peripheral surface) and vibrator sheath tubes 91, 92 outer surface (outer peripheral surface) defined (enclosed) in a space from which concrete is poured from above to make a reinforced concrete first lot. Build 31. At this time, concrete does not enter into the concrete placing sheath pipes 81 and 82 and the vibrator sheath pipes 91 and 92.

Next, when the concrete in the first lot 31 is hardened and strength is developed, the fixture 53 is removed and the first lot construction form 50 is removed, as shown in FIGS. 5(a) and 5(b). ..

Next, as shown in FIGS. 6A and 6B, the ground 11a between the mountain retention points 6 and 7 is dug down by several meters. This digging depth is larger than the vertical length of the second lot 32.
Next, a member (not shown) such as a stud bolt for integrating with the second lot 32 is attached to the left side surface of the exposed portion of the mountain stay 7 and the outer peripheral surface of the support pile 12.

Next, as shown in FIGS. 6A and 6B, in the constructed first lot 31, below the lower ends of the concrete placing sheath pipes 81 and 82 and the vibrator sheath pipes 91 and 92, respectively. Remove the concrete and remove the first lid member from each sheath tube. Thereby, the sheath pipes 81, 82 for concrete pouring and the sheath pipes 91, 92 for vibrators extend from the upper end portion to the lower end portion of the first lot 31 and penetrate the first lot 31. Further, each of the concrete placing sheath pipes 81 and 82 and the vibrator sheath pipes 91 and 92 connects the upper side of the first lot 31 and the lower side of the first lot 31.
At this time, at the lower end of the constructed first lot 31, the lower end of the suspended steel material 14 and the lower end of the vertical streak are exposed by the joint length.

Next, as shown in FIGS. 7A and 7B, by connecting the upper end of a new sheath pipe 82a to the lower end of the concrete pouring sheath pipe 82, the concrete pouring sheath pipe 82 is formed. Extend downward. Here, the sheath tube 82a, which is a tubular member, corresponds to the "extension portion of the first tubular member" of the present invention and also corresponds to the extension portion of the sheath pipe 82 for concrete pouring. Regarding the connection between the lower end of the concrete placing sheath pipe 82 and the upper end of the sheath pipe 82a, the upper end of the sheath pipe 82a is attached to the inner peripheral surface or the outer peripheral surface of the lower end of the concrete placing sheath pipe 82. A spiral sheath tube is used so that the outer peripheral surface or the inner peripheral surface can be screwed. In the present embodiment, the diameter of the sheath pipe 82 for concrete pouring may be different from the diameter of the sheath pipe 82a. Alternatively, when the diameter of the sheath pipe 82 for concrete pouring and the diameter of the sheath pipe 82a are the same, the lower end of the sheath pipe 82 for concrete pouring and the upper end of the sheath pipe 82a are used by using an appropriate connecting means. You may connect with a part.

Further, as shown in FIG. 7B, by connecting the upper end of a new sheath tube 92a to the lower end of the vibrator sheath tube 92, the vibrator sheath tube 92 is extended downward. Here, the sheath tube 92a, which is a tubular member, corresponds to the "extension of the first tubular member" of the present invention and also corresponds to the extension of the vibrator sheath tube 92. Regarding the connection between the lower end of the vibrator sheath tube 92 and the upper end of the sheath tube 92a, the inner peripheral surface or the outer peripheral surface of the lower end of the vibrator sheath tube 92 should be attached to the outer peripheral surface or the inner peripheral surface of the upper end of the sheath tube 92a. A spiral sheath tube is used so that the peripheral surface can be screwed. In the present embodiment, the diameter of the vibrator sheath tube 92 and the diameter of the sheath tube 92a may be different. Alternatively, when the diameter of the vibrator sheath tube 92 and the diameter of the sheath tube 92a are the same, the lower end of the vibrator sheath tube 92 and the upper end of the sheath tube 92a are connected by using an appropriate connecting means. You may.

Here, with respect to the sheath tubes 82a and 92a, a second lid member (not shown) such as a cap is detachably attached so as to close the respective lower surface openings. The second lid member may be attached to the floor mold 51 so as to be detachable integrally with the floor mold 51.

Next, as shown in FIG. 8A, the suspended steel material 14 is extended downward by connecting the upper end portion of a new suspended steel material 14 a to the lower end portion of the suspended steel material 14. Appropriate connecting means such as a coupler is used to connect the hanging steel members 14 and 14a.

Next, as shown in FIGS. 8(a) and 8(b), the floor form 51 in a tilted state as described above is detachably attached to the lower end portion of the hanging steel material 14a via the fixture 53.
Next, while connecting the upper end of the vertical bar forming the second lot 32 to the lower end of the vertical bar forming the first lot 31, the main reinforcing bars (vertical bar and horizontal bar) forming the second lot 32 and Install shear reinforcement bars (neither shown).

Next, as shown in FIGS. 8A and 8B, the side form 62 is fixed to the left end of the floor form 51 at its lower end via the aforementioned embedded anchor. Here, the side frame 62 is installed at a distance from the mountain retainer 7 such that the right side surface thereof faces the left side surface of the exposed portion of the mountain retainer 7.

Here, the second lot construction mold 60 is composed of a floor mold 51 and a plate-shaped side mold 62 extending in the front-rear direction. The second lot construction form 60 is installed so as to surround the construction planned region of the second lot 32. In addition, by the lower surface of the first lot 31, the left side surface of the exposed portion of the mountain stay 7, and the inner surface of the second lot building mold 60 (the upper surface of the floor mold 51 and the right surface of the side mold 62). In the partitioned (enclosed) space, the main reinforcing bar, the shear reinforcing bar, the suspended steel material 14a, the extension part of the sheath pipe 82 for concrete placement (sheath pipe 82a), and the extension part (sheath of the sheath pipe 92 for vibrator). The tube 92a) is located.

Next, as shown in FIGS. 8A and 8B, the lower surface of the first lot 31, the left side surface of the exposed portion of the mountain retainer 7, and the inner surface of the second lot construction mold 60 (floor formwork). The upper surface of 51 and the right side surface of the side form 62, the outer surface (outer peripheral surface) of the extension portion (sheath tube 82a) of the concrete casting sheath tube 82, and the extension portion (sheath tube 92a) of the vibrator sheath tube 92. ), the second lot 32 made of reinforced concrete is constructed by placing concrete in a space defined (enclosed) by the outer surface (outer peripheral surface). At this time, concrete does not enter the concrete placing sheath tube 82 and its extension (sheath tube 82a) and the vibrator sheath tube 92 and its extension (sheath tube 92a).

Here, the concrete pouring work when constructing the second lot 32 will be described with reference to FIGS. 23 to 26.
FIG. 23 shows the concrete pouring pipe 85 inserted into the concrete pouring sheath pipe 81. FIG. 24 shows the arrangement of the vibrator 95. 25 and 26 show a concrete pouring method at the time of constructing the second lot. Note that FIG. 23 corresponds to the portion P of FIG. 24 corresponds to the portion Q of FIG.

As shown in FIG. 23, in the concrete pouring work at the time of constructing the second lot 32, for example, the concrete pouring pipe 85 made of a 5B (5 inch) steel pipe is inserted into the concrete pouring sheath pipe 81, and the concrete pouring is performed. A concrete hose from a concrete supply source is connected to the upper end of the casting pipe 85 (above the first lot 31). The lower end of the concrete pouring pipe 85 is the lower surface of the first lot 31, the left side surface of the exposed portion of the mountain stay 7, and the inner surface of the second lot construction mold 60 (the upper surface and the side mold of the floor mold 51). The right side surface of the frame 62), the outer surface (outer peripheral surface) of the extension portion (sheath tube 82a) of the concrete casting sheath tube 82, and the outer surface (outer peripheral surface) of the extension portion (sheath tube 92a) of the vibrator sheath tube 92. As shown in FIG. 23, the concrete is supplied from the concrete supply source through the concrete hose and the concrete placing pipe 85 while being positioned in the space partitioned (enclosed) by and. It When the placing of concrete of a predetermined layer thickness is completed using the concrete placing pipe 85 inserted in a certain concrete placing sheath pipe 81, the concrete placing pipe 85 is pulled out from the concrete placing sheath pipe 81. Then, it is inserted into another adjacent one of the sheath pipes 81 for concrete pouring, and concrete is poured. In this way, the transfer of the concrete placing pipe 85 and the placing of the concrete are repeated, and when the concrete reaches the lower surface of the first lot 31, the so-called one-sided placing is performed.

Here, the single-sided driving will be described with reference to FIGS. 25 and 26.
If the concrete poured using the concrete placing pipe 85 inserted into the concrete placing sheath pipe 81-1 reaches the lower surface of the first lot 31, the concrete placing is continued (Fig. 25(a ) And (b)), eventually, the concrete flows into another concrete placing sheath pipe 81-2 next to the concrete placing sheath pipe 81-1 and the concrete is put into the concrete placing sheath pipe. The inside of 81-2 rises (see FIG. 25(c)). After the worker confirms the rise of the concrete, as shown in FIG. 26(a), the concrete placing pipe 85 is pulled out from the concrete placing sheath pipe 81-1 and the concrete placing sheath pipe 81- 2 and the concrete pouring is restarted (see FIGS. 26(a) and 26(b)). In this way, at the end of the concrete pouring work at the time of constructing the second lot 32, by pouring concrete in order from the front to the rear, the lower surface of the first lot 31 and the upper surface of the second lot 32 are You can surely fill the concrete in between.

As described above, since the concrete placing pipe 85 can be inserted into the concrete placing sheath pipe 81, concrete can flow through the inside of the concrete placing sheath pipe 81.

The concrete compaction at the time of constructing the second lot 32 is located near the sheath pipe 81 for concrete pouring which is being used for pouring concrete and in front of the sheath pipe 81 for concrete pouring. The vibrator 95 is hung on each of the two vibrator sheath tubes 91 and the two vibrator sheath tubes 91 located behind the concrete placing sheath tube 81 (see FIG. 24 ). Here, the vibrator 95 is inserted into the cast concrete, gives vibration to the concrete, and compacts the concrete.
Therefore, in the present embodiment, the vibrator 95 can be inserted into the vibrator sheath tube 91 from above the first lot 31.

As described above, the concrete pouring work at the time of constructing the second lot 32 is performed.

Next, when the concrete of the second lot 32 is hardened and strength is developed, the fixture 53 is removed and the second lot construction form 60 is removed as shown in FIGS. 9(a) and 9(b). ..

Next, as shown in FIGS. 10(a) and 10(b), the ground 11a between the mountain retention points 6 and 7 is dug down by several meters. This digging depth is larger than the vertical length of the third lot 33.
Next, a member (not shown), such as a stud bolt, for integrating with the third lot 33 is attached to the left side surface of the exposed portion of the mountain stay 7 and the outer peripheral surface of the support pile 12.

Next, as shown in FIGS. 10A and 10B, in the constructed second lot 32, the extension portion of the sheath pipe 82 for concrete placing (sheath pipe 82a) and the extension of the sheath pipe 92 for vibrator are extended. The concrete below the lower end of each part (sheath tube 92a) is removed, and the second lid member is removed from each sheath tube. As a result, each of the extension portion of the sheath pipe 82 for concrete pouring (sheath pipe 82a) and the extension portion of the sheath pipe 92 for vibrator (sheath pipe 92a) extends from the upper end portion to the lower end portion of the second lot 32. Penetrate 2 lots 32. Further, the extension part of the sheath pipe 82 for concrete pouring (sheath pipe 82a) and the extension part of the sheath pipe 92 for vibrator (sheath pipe 92a) respectively extend above the second lot 32 and below the second lot 32. Communicate. Moreover, both the sheath pipe 82 for concrete pouring and its extension (sheath pipe 82a) and the sheath pipe 92 for vibrator and its extension (sheath pipe 92a) are above the first lot 31 and the first lot 31, respectively. It communicates with the lower side of the two lots 32.
At this time, at the lower end of the constructed second lot 32, the lower end of the suspended steel material 14a and the lower end of the vertical streak are exposed by the joint length.

Next, as shown in FIG. 11A, the suspended steel materials 14 and 14a are extended downward by connecting the upper end of a new suspended steel material 14b to the lower end of the suspended steel material 14a. Appropriate connecting means such as a coupler is used to connect the hanging steel members 14a and 14b.

Next, as shown in FIGS. 11(a) and 11(b), the floor form 51 in a tilted state as described above is detachably attached to the lower end portion of the hanging steel material 14b via the fixture 53.
Next, while connecting the upper ends of the vertical bars forming the third lot 33 to the lower ends of the vertical bars forming the second lot 32, main reinforcing bars (vertical bars and horizontal bars) forming the third lot 33 and Install shear reinforcement bars (neither shown).

Next, as shown in FIGS. 11A and 11B, the side form 72 is fixed to the left end of the floor form 51 at the lower end thereof via the embedded anchor described above. Here, the side part form 72 is installed at a distance from the mountain retainer 7 such that the right side surface thereof faces the left side surface of the exposed portion of the mountain retainer 7.

The third lot construction mold 70 is composed of a floor mold 51 and a plate-shaped side mold 72 extending in the front-rear direction. The third lot construction mold 70 is installed so as to surround the construction planned area of the third lot 33. In addition, by the lower surface of the second lot 32, the left side surface of the exposed portion of the mountain stay 7, and the inner surface of the third lot building form 70 (the upper surface of the floor form 51 and the right side of the side form 72). The main rebar, the shear reinforcing bar, and the suspended steel material 14b are located in the partitioned (enclosed) space.

Next, as shown in FIGS. 11(a) and 11(b), the lower surface of the second lot 32, the left side surface of the exposed portion of the mountain retainer 7, and the inner surface of the third lot building form 70 (floor formwork). Concrete is poured in a space defined (enclosed) by the upper surface of 51 and the right side surface of the side form 72 to construct the third lot 33 made of reinforced concrete.

In the concrete placing work at the time of constructing the third lot 33, the concrete placing pipe 85 is inserted into the concrete placing sheath pipe 82 and its extension (sheath pipe 82a), and the upper end portion of the concrete placing pipe 85 ( A concrete hose from a concrete supply source is connected to (above the first lot 31). The lower end of the concrete pouring pipe 85 is the lower surface of the second lot 32, the left side surface of the exposed portion of the mountain stay 7, and the inner surface of the third lot construction form 70 (the upper face and the side form of the floor form 51). Concrete is supplied from a concrete supply source into the space through a concrete hose and a concrete placing pipe 85 in a state of being positioned in (enclosed) by the right side surface of the frame 72). .. When the placing of concrete of a predetermined layer thickness is completed using a certain concrete placing sheath pipe 82 and the concrete placing pipe 85 inserted into its extension (sheath pipe 82a), the concrete placing pipe 85 is It is pulled out from the concrete pouring sheath pipe 82 and its extension (sheath pipe 82a) and inserted into another adjacent concrete pouring sheath pipe 82 and its extension (sheath pipe 82a) to pour concrete. Set up. In this way, the transfer of the concrete pouring pipe 85 and the pouring of concrete are repeated, and when the concrete reaches the lower surface of the second lot 32, the concrete pouring work at the time of constructing the second lot 32 described above is performed. Then, one-sided driving is performed (see FIGS. 25 and 26 described above).

As described above, since the concrete placing pipe 85 can be inserted into the concrete placing sheath pipe 82 and its extension (sheath pipe 82a), the concrete placing sheath pipe 82 and its extension (sheath pipe). Concrete can flow through the inside of 82a).

The concrete compaction at the time of constructing the third lot 33 is performed near the concrete placing sheath pipe 82 and its extension (sheath pipe 82a) which are being used for placing the concrete, and the concrete placing is performed. Two sheath tubes 92 for vibrator and its extension (sheath tube 92a) located in front of the sheath tube 82 for water and its extension (sheath tube 82a), and the sheath tube 82 for concrete pouring and its extension (sheath). The vibrator 95 is hung on each of the two vibrator sheath tubes 92 located behind the tube 82a) and its extension (sheath tube 92a).
Therefore, in the present embodiment, the vibrator 95 can be inserted into the vibrator sheath tube 92 and its extension (sheath tube 92a).

As described above, the concrete pouring work at the time of constructing the third lot 33 is performed.

Next, when the concrete of the third lot 33 is hardened and strength is developed, the fixture 53 is removed and the third lot construction form 70 is removed, as shown in FIGS. 12(a) and 12(b). ..

Incidentally, at an arbitrary time after the concrete placing work at the time of constructing the second lot 32 is completed, the inside of the concrete placing sheath pipe 81 and the inside of the vibrator sheath pipe 91 are filled with concrete or mortar. In addition, at any time after the concrete placing work at the time of constructing the third lot 33 is completed, the inside of the concrete placing sheath pipe 82 and its extension (sheath pipe 82a), the vibrator sheath pipe 92, and Concrete or mortar is filled inside the extension (sheath tube 92a).

Then, when the bottom portion 5 is constructed, the lower end portion of the third lot 33 and the bottom portion 5 are connected. In this way, the side wall 3 is constructed by constructing the first lot 31, the second lot 32, and the third lot 33 in order from top to bottom.

The method for constructing the left side wall 2 is the same as the method for constructing the right side wall 3 described above except that the left side and the right side are interchanged, and therefore description thereof will be omitted.

Next, a method of constructing the partition wall 4 will be described with reference to FIGS. 13 to 22 are views showing a method of constructing the partition wall 4. Here, FIG. 13A corresponds to the DD cross section of FIG. 1 and corresponds to the installation position of the support pile 12. 14A to 22A correspond to the EE cross section of FIG. 1 and correspond to the installation position of the sheath pipe 82 for concrete pouring. 13B to 22B correspond to the FF cross section of FIG. 1. It should be noted that in FIGS. 14A to 22A, for simplification of the illustration, illustration of a support pile 13 described later is omitted. 14(b) to 22(b), the hanging steel materials 14, 14a, 14b are not shown for the sake of simplifying the illustration.

In the method of constructing the partition wall 4 in the present embodiment, first, the partition wall 4 to be constructed is divided into three vertical lots (first lot 41, second lot 42, and third lot 43). FIG. 22A described later).
Next, as shown in FIGS. 3(a) and 3(b), the ground 11a between the mountain retention points 6 and 7 is dug down by about several meters (see FIGS. 13(a) and 13(b)). This digging depth is larger than the vertical length of the first lot 41.

In addition, as shown in FIGS. 13A and 13B, a plurality of support piles 13 are installed at intervals in the front-rear direction. The support pile 13 supports the first lot 41, the second lot 42, and the third lot 43. The support piles 13 may be installed before the construction of the mountain stays 6 and 7, or after the above-mentioned ground 11a is dug down.

Next, a member (not shown) such as a stud bolt for integrating with the first lot 41 is attached to the outer peripheral surface of the support pile 13.
Next, the main rebars (longitudinal rebars and horizontal rebars) and the shear reinforcing bar (both not shown) that form the first lot 41 are installed. These reinforcing bars can be directly or indirectly attached to the support pile 13 and supported by the support pile 13, for example.

Next, as shown in FIG. 14A, a plurality of hanging steel materials 14 each extending in the vertical direction are installed. The upper end of the suspended steel material 14 is supported by the support pile 13.

Next, as shown in FIGS. 14A and 14B, the first lot construction form 50' is installed so as to surround the construction planned region of the first lot 41.
The first lot construction mold 50' includes a plate-shaped floor mold 51' having an upward convex mountain-shaped cross section and extending in the front-rear direction, and a pair of left and right plate-shaped side molds extending in the front-rear direction. And a frame 52.

The floor form 51' is a suspension form suspended by the suspension steel material 14 described above. The floor form 51' is detachably fixed to the hanging steel material 14 via a fixture 53.
The floor form 51' is inclined so that it goes upward from the left and right ends toward the center (top 51a' side). Embedded anchors (not shown) for connecting to the lower ends of the side molds 52 are provided on both left and right ends of the floor mold 51′.

The pair of left and right side molds 52 are installed so as to face each other with a space therebetween. The pair of left and right side molds 52 are fixed to the left and right ends of the floor mold 51' via the embedded anchors at their lower ends.

Next, as shown in FIGS. 14A and 14B, the concrete placing sheath pipes 81 and 82 and the vibrator sheath pipes 91 and 92 are placed at a central position between the pair of left and right side molds 52. To install. The lower ends of the concrete placing sheath pipes 81 and 82 and the vibrator sheath pipes 91 and 92 are located near the central top portion 51a′ of the floor form 51′ and face the top portion 51a′. ing.

In the construction of the intermediate partition wall 4, the concrete placing sheath tube 81 and the vibrator sheath tube 91 are used for concrete placing work when constructing the second lot 42. The sheath pipe 82 for concrete pouring and the sheath pipe 92 for vibrator are used for concrete pouring work when constructing the third lot 43.

In the present embodiment, the plurality of sheathing pipes 81 for concrete pouring are arranged in a row in the front-rear direction at intervals of, for example, 5 m. Between the adjacent concrete pouring sheath pipes 81, three vibrator sheath pipes 91 are arranged in a line in the front-rear direction at intervals of, for example, 1.25 m.

In the present embodiment, the plurality of sheathing pipes 82 for concrete pouring are arranged in one row in the front-rear direction at intervals of, for example, 5 m. Between the adjacent concrete placing sheath pipes 82, three vibrator sheath pipes 92 are arranged in a line in the front-rear direction at intervals of, for example, 1.25 m.

The concrete placing sheath pipes 81 and 82 and the vibrator sheath pipes 91 and 92 may be directly or indirectly attached to the main rebars constituting the first lot 41 and supported by the main rebars, for example. ..
A first lid member (not shown) such as a cap is detachably attached to the concrete placing sheath pipes 81 and 82 and the vibrator sheath pipes 91 and 92 so as to close the respective lower surface openings. .. The first lid member may be attached to the floor form 51' so as to be detachable integrally with the floor form 51'.

Therefore, it is partitioned by the inner surface of the first lot construction mold 50′ (the upper surface of the floor mold 51′, the right surface of the left side mold 52, and the left surface of the right side mold 52). In the (enclosed) space, main reinforcing bars, shear reinforcing reinforcing bars, suspended steel materials 14, sheath pipes 81, 82 for placing concrete, and sheath pipes 91, 92 for vibrators are arranged.

In this embodiment, the concrete placing sheath pipes 81 and 82 and the vibrator sheath pipes 91 and 92 are installed after the first lot construction form 50' is installed. After installing the installation sheath tubes 81, 82 and the vibrator sheath tubes 91, 92, the installation of the first lot construction form 50' may be installed.

Next, the inner surface of the first lot building mold 50' (the upper surface of the floor mold 51', the right surface of the left side mold 52, and the left surface of the right side mold 52) and concrete. Concrete is poured from above into a space defined (enclosed) by the outer surfaces (outer peripheral surfaces) of the casting sheath tubes 81 and 82 and the outer surfaces (outer peripheral surfaces) of the vibrator sheath tubes 91 and 92, Build a first lot 41 made of reinforced concrete. At this time, concrete does not enter into the concrete placing sheath pipes 81 and 82 and the vibrator sheath pipes 91 and 92.

Next, when the concrete in the first lot 41 hardens and strength develops, the fixture 53 is removed and the first lot construction form 50' is removed, as shown in FIGS. 15(a) and 15(b). To do.

Next, as shown in FIGS. 6(a) and 6(b), the ground 11a between the mountain retention points 6 and 7 is dug down by about several meters (see FIGS. 16(a) and 16(b)). This digging depth is larger than the vertical length of the second lot 42.
Next, a member (not shown) such as a stud bolt for integrating with the second lot 42 is attached to the outer peripheral surface of the support pile 13.

Next, as shown in FIGS. 16( a) and 16 (b ), in the constructed first lot 41, below the lower ends of the concrete placing sheath pipes 81 and 82 and the vibrator sheath pipes 91 and 92, respectively. Remove the concrete and remove the first lid member from each sheath tube. As a result, each of the sheath pipes 81 and 82 for concrete pouring and the sheath pipes 91 and 92 for vibrators extends from the upper end portion to the lower end portion of the first lot 41 and penetrates the first lot 41. Further, each of the concrete placing sheath pipes 81 and 82 and the vibrator sheath pipes 91 and 92 communicates between the upper side of the first lot 41 and the lower side of the first lot 41.
At this time, at the lower end of the constructed first lot 41, the lower end of the suspended steel material 14 and the lower end of the vertical streak are exposed by the joint length.

Next, as shown in FIGS. 17(a) and 17(b), the sheath pipe for concrete placing 82 is connected by connecting the upper end of a new sheath pipe 82a to the lower end of the sheath pipe 82 for concrete placing. Extend downward.
Further, as shown in FIG. 17B, the upper end of a new sheath tube 92a is connected to the lower end of the vibrator sheath tube 92 to extend the vibrator sheath tube 92 downward.

Here, with respect to the sheath tubes 82a and 92a, a second lid member (not shown) such as a cap is detachably attached so as to close the respective lower surface openings. The second lid member may be attached to the floor form 51' so as to be detachable integrally with the floor form 51'.

Next, as shown in FIG. 18A, the suspended steel material 14 is extended downward by connecting the upper end portion of a new suspended steel material 14a to the lower end portion of the suspended steel material 14.

Next, as shown in FIGS. 18( a) and 18 (b ), a floor form 51 ′ having a mountain-shaped cross section is detachably attached to the lower end of the suspended steel material 14 a via a fixture 53.
At this time, the respective lower ends of the extension portion of the sheath pipe 82 for concrete pouring (sheath pipe 82a) and the extension portion of the sheath pipe 92 for vibrator (sheath pipe 92a) are at the central top portion of the floor form 51'. It is located in the vicinity of 51a' and faces the top portion 51a'.

Next, while connecting the upper end of the vertical bar forming the second lot 42 to the lower end of the vertical bar forming the first lot 41, the main reinforcing bars (vertical bar and horizontal bar) forming the second lot 42 and Install shear reinforcement bars (neither shown).

Next, as shown in FIGS. 18(a) and 18(b), a pair of left and right side molds 62 are provided at the lower ends of the left and right ends of the floor form 51' through the embedded anchors. Fixed to each. Here, the pair of left and right side molds 62 are installed so as to face each other with a space therebetween.

The second lot construction mold 60' is composed of a floor mold 51' and a pair of left and right plate-shaped side molds 62 extending in the front-rear direction. The second lot construction form 60 ′ is installed so as to surround the construction planned region of the second lot 42. Further, the lower surface of the first lot 41, the inner surface of the second lot building mold 60′ (the upper surface of the floor mold 51′, the right side surface of the left side mold 62, and the right side mold 62). In the space defined by (surrounded by the left side surface of), the main reinforcing bar, the shear reinforcing bar, the suspended steel material 14a, the extension part of the sheath pipe 82 for concrete placing (sheath pipe 82a), and the sheath pipe for vibrator. The extension (sheath tube 92a) of 92 is located.

Next, as shown in FIGS. 18A and 18B, the lower surface of the first lot 41 and the inner surface of the second lot building mold 60′ (the upper surface of the floor mold 51′, the left side mold). The right side surface of the frame 62 and the left side surface of the right side form frame 62), the outer surface (outer peripheral surface) of the extension portion (sheath tube 82a) of the concrete placing sheath tube 82, and the vibrator sheath tube 92. Concrete is poured into a space defined (enclosed) by the outer surface (outer peripheral surface) of the extension portion (sheath tube 92a) to construct the second lot 42 made of reinforced concrete. At this time, concrete does not enter the concrete placing sheath tube 82 and its extension (sheath tube 82a) and the vibrator sheath tube 92 and its extension (sheath tube 92a).

In the concrete placing work at the time of constructing the second lot 32, the concrete placing pipe 85 is inserted into the concrete placing sheath pipe 81, and the concrete is placed on the upper end portion (above the first lot 41) of the concrete placing pipe 85. Connect concrete hoses from your source. The lower end of the concrete pouring pipe 85 includes the lower surface of the first lot 41, the inner surface of the second lot building mold 60′ (the upper surface of the floor mold 51′, the right surface of the left side mold 62, and , The left side surface of the right side mold 62), the outer surface (outer peripheral surface) of the extension portion (sheath tube 82a) of the concrete casting sheath tube 82, and the extension portion (sheath tube 92a) of the vibrator sheath tube 92. The concrete is supplied from the concrete supply source to the space through the concrete hose and the concrete placing pipe 85 while being positioned in the space defined (enclosed) by the outer surface (outer peripheral surface) of the concrete. .. When the placing of concrete of a predetermined layer thickness is completed using the concrete placing pipe 85 inserted in a certain concrete placing sheath pipe 81, the concrete placing pipe 85 is pulled out from the concrete placing sheath pipe 81. Then, it is inserted into another adjacent one of the sheath pipes 81 for concrete pouring, and concrete is poured. In this way, the transfer of the concrete placing pipe 85 and the placing of the concrete are repeated, and when the concrete reaches the lower surface of the first lot 41, as in the concrete placing work at the time of constructing the second lot 32 described above. Then, one-sided driving is performed (see FIGS. 25 and 26 described above).

The concrete compaction at the time of constructing the second lot 42 is located near the sheath pipe 81 for concrete pouring which is being used for pouring concrete, and in front of the sheath pipe 81 for concrete pouring. The vibrator 95 is suspended from each of the two vibrator sheath tubes 91 and the two vibrator sheath tubes 91 located behind the concrete placing sheath tube 81.

As described above, the concrete placing work at the time of constructing the second lot 42 is performed.

Next, when the concrete of the second lot 42 hardens and strength develops, as shown in FIGS. 19(a) and (b), the fixture 53 is removed and the second lot construction form 60' is removed. To do.

Next, as shown in FIGS. 10A and 10B, the ground 11a between the mountain retention points 6 and 7 is dug down by about several meters (see FIGS. 20A and 20B). This digging depth is larger than the vertical length of the third lot 43.
Next, a member (not shown) such as a stud bolt for integrating with the third lot 43 is attached to the outer peripheral surface of the support pile 13.

Next, as shown in FIGS. 20( a) and 20 (b ), in the constructed second lot 42, the extension part (sheath pipe 82 a) of the sheath pipe 82 for concrete placing and the extension of the sheath pipe 92 for vibrator are extended. The concrete below the lower end of each part (sheath tube 92a) is removed, and the second lid member is removed from each sheath tube. As a result, the extension portion of the sheath pipe 82 for concrete pouring (sheath pipe 82a) and the extension portion of the sheath pipe 92 for vibrator (sheath pipe 92a) each extend from the upper end portion to the lower end portion of the second lot 42, and Penetrate 2 lots 32. Further, each of the extension portion of the sheath pipe 82 for concrete pouring (sheath pipe 82a) and the extension portion of the sheath pipe 92 for vibrator (sheath pipe 92a) is located above the second lot 42 and below the second lot 42. Communicate. Further, both the sheath pipe 82 for concrete pouring and its extension (sheath pipe 82a) and the sheath pipe 92 for vibrator and its extension (sheath pipe 92a) are above the first lot 41 and the first lot 41, respectively. It communicates with the lower part of the two lots 42.
Further, at this time, at the lower end of the constructed second lot 42, the lower end of the suspended steel material 14a and the lower end of the vertical streak are exposed by the joint length.

Next, as shown in FIG. 21(a), the hanging steel materials 14 and 14a are extended downward by connecting the upper end portion of a new hanging steel material 14b to the lower end portion of the hanging steel material 14a.

Next, as shown in FIGS. 21A and 21B, a floor form 51' having a mountain-shaped cross section is detachably attached to the lower end of the suspended steel material 14b via a fixture 53.
Next, while connecting the upper end of the vertical bar forming the third lot 43 to the lower end of the vertical bar forming the second lot 42, the main reinforcing bars (vertical bar and horizontal bar) forming the third lot 43 and Install shear reinforcement bars (neither shown).

Next, as shown in FIGS. 21(a) and 21(b), a pair of left and right side molds 72 is provided at the lower end of each of the left and right end parts of the floor form 51' through the embedded anchors. Fixed to each. Here, the pair of left and right side molds 72 are installed so as to face each other with a space therebetween.

The third lot construction mold 70' is composed of a floor mold 51' and a pair of left and right plate-shaped side molds 72 extending in the front-rear direction. The third lot construction form 70 ′ is installed so as to surround the construction planned region of the third lot 43. Further, the lower surface of the second lot 42, the inner surface of the third lot building mold 70′ (the upper surface of the floor mold 51′, the right side surface of the left side mold 72, and the right side mold 72). The main rebar, the shear reinforcing rebar, and the hanging steel material 14b are located in a space defined (enclosed) by (left side surface of).

Next, as shown in FIGS. 21A and 21B, the lower surface of the second lot 42 and the inner surface of the third lot building mold 70' (the upper surface of the floor mold 51', the left side mold). Concrete is poured into a space defined (enclosed) by the right side surface of the frame 72 and the left side surface of the right side form 72 to construct the third lot 43 made of reinforced concrete.

In the concrete placing work at the time of constructing the third lot 43, the concrete placing pipe 85 is inserted into the concrete placing sheath pipe 82 and its extension (sheath pipe 82a), and the upper end portion of the concrete placing pipe 85 ( A concrete hose from a concrete supply source is connected to (above the first lot 41). The lower end of the concrete placing pipe 85 is the lower surface of the second lot 42, the inner surface of the third lot building form 70' (the upper surface of the floor form 51', the right side surface of the left side form 72, and , The left side surface of the right side mold 72), the interior of the space is surrounded (enclosed) by a concrete supply source through a concrete hose and a concrete placing pipe 85. Is supplied with concrete. When the placing of concrete of a predetermined layer thickness is completed using a certain concrete placing sheath pipe 82 and the concrete placing pipe 85 inserted into its extension (sheath pipe 82a), the concrete placing pipe 85 is It is pulled out from the concrete pouring sheath pipe 82 and its extension (sheath pipe 82a) and inserted into another adjacent concrete pouring sheath pipe 82 and its extension (sheath pipe 82a) to pour concrete. Set up. In this manner, the transfer of the concrete placing pipe 85 and the placing of the concrete are repeated, and when the concrete reaches the lower surface of the second lot 42, the concrete placing work at the time of constructing the second lot 32 described above is performed. Then, one-sided driving is performed (see FIGS. 25 and 26 described above).

The compaction of concrete at the time of constructing the third lot 43 is performed near the sheath pipe 82 for concrete pouring and its extension (sheath pipe 82a) which is being used for concrete pouring, and the concrete pouring is performed. Two sheath tubes for vibrators 92 and their extended portions (sheath tubes 92a) located in front of the sheath tube for concrete 82 and their extended portions (sheath tube 82a), and the sheath tube for concrete pouring 82 and its extended portions (sheath). The vibrator 95 is hung on each of the two vibrator sheath tubes 92 located behind the tube 82a) and its extension (sheath tube 92a).

As described above, the concrete placing work is performed when the third lot 43 is constructed.

Next, when the concrete of the third lot 43 is hardened and strength is developed, the fixture 53 is removed and the third lot construction form 70' is removed as shown in FIGS. 22(a) and 22(b). To do.

Incidentally, at an arbitrary time after the concrete placing work at the time of constructing the second lot 42 is completed, the inside of the concrete placing sheath pipe 81 and the inside of the vibrator sheath pipe 91 are filled with concrete or mortar. In addition, at any time after the concrete placing work at the time of constructing the third lot 43 is completed, the inside of the concrete placing sheath tube 82 and its extension (sheath tube 82a), the vibrator sheath tube 92, and Concrete or mortar is filled inside the extension (sheath tube 92a).

Then, when the bottom portion 5 is constructed, the lower end portion of the third lot 43 and the bottom portion 5 are connected. In this way, the first lot 41, the second lot 42, and the third lot 43 are constructed in order from the top to the bottom, so that the partition wall 4 is constructed.

Next, the effect of the method for constructing a concrete skeleton in the present embodiment will be described using the method for constructing the side wall 3 (the method for constructing the second lot 32) as an example with reference to FIG.
FIGS. 27(a) and 27(b) show a conventional method for constructing the side wall 3 of the underground structure 1 (method for constructing the second lot 32), which is shown in FIGS. 8(a) and 9(a) above. It corresponds to.

As shown in FIGS. 27( a) and (b ), in the conventional method of constructing the side wall 3, without using the concrete placing sheath tube 81 and the vibrator sheath tube 91, on the upper portion of the side form 62, A plurality of hoppers (concrete input ports) 64 were provided in the front-rear direction at intervals of about 4 to 5 m so as to be located laterally to the lower end of the first lot 31. Then, from the hopper 64, in a space surrounded by the lower surface of the first lot 31, the left side surface of the exposed portion of the mountain clasp 7, the upper surface of the floor form 51, and the right side surface of the side form 62, While pouring concrete, a vibrator (not shown) was inserted from the hopper 64 into the space to compact the concrete. Here, the confirmation of the filling of the concrete was performed by overflowing the concrete to the upper part of the hopper 64. Further, the concrete 64a at 64 places of the hopper has been hardened and flattened after being hardened to finish the surface.

The conventional method of constructing the side wall 3 has the following problems (1) to (5).
(1) Since the distance between the hoppers 64 is about 4 to 5 m, and the distance between the vibrators inserted from the hopper 64 is too large, the distance between the adjacent hoppers 64 is about 1.2 m. Cavities and junkers are easy to form in the middle. Therefore, it is necessary to separately form a vibrator insertion hole and use a form vibrator.

(2) When concrete is input from the hopper 64 in the final stage of the construction of the second lot 32, since the height difference of the concrete is about 30 cm and no pressure is applied, the concrete flow is poor and the intermediate portion between the adjacent hoppers 64 is low. It is difficult to fill the concrete with concrete. As a countermeasure against this, it may be necessary to use high-fluidity concrete, which leads to an increase in cost.

(3) When concrete is cast from the hopper 64, the concrete is cast from the outside of the grid-shaped reinforcing bars including the main reinforcing bars and the shear reinforcing bars, so that the concrete easily hits the reinforcing bars and is easily separated, which in turn easily causes junkers. ..

(4) When concrete is poured from the hopper 64 in the final stage of the construction of the second lot 32, the concrete is placed without applying pressure, and a gap is easily formed between the concrete and the lower surface of the first lot 31, so that the concrete is hardened. It may be necessary to inject cement milk at the joint afterwards.

(5) After the strength of the concrete develops, it is necessary to remove the hopper 64, scrape the concrete, and finish the surface.

In this respect, the method of constructing the side wall 3 according to this embodiment has the following effects.
Regarding the problem (1), since the vibrator sheath tubes 91 are arranged at intervals of 1.25 m, the vibrators 95 can be applied at intervals of 1.25 m, so that reliable concrete compaction is realized. You can Therefore, it is not necessary to separately form a vibrator insertion hole or use a form vibrator.

Regarding the problems (2) and (4), regarding the second lot 32 during concrete pouring, the uppermost layer of the concrete is subjected to the above-mentioned one-sided pouring, so that the vertical direction of the first lot 31 is It is possible to pour the concrete while applying the concrete pouring pressure of the length (the vertical length of the concrete pouring sheath tube 81), that is, about 3 to 5 m, and thus the concrete pouring is surely performed. Installation and filling can be performed.

Regarding the problem (3), since the concrete placing sheath tube 81 and the vibrator sheath tube 91 can be arranged at positions not overlapping the shear reinforcing bar, the placing concrete hits the reinforcing bar and material separation occurs. Can be suppressed. Further, it is possible to prevent the vibrator from being entangled with the shear reinforcing bar.

Regarding the problem (5), the use of the concrete casting sheath pipe 81 and the vibrator sheath pipe 91 eliminates the need for the hopper 64. Therefore, since the side form 62 can be formed into a flat shape without the hopper 64, a normal metal or wooden flat form can be used. Further, since the hopper 64 is not necessary, it is possible to omit the above-mentioned extra concrete scrubbing work and surface finishing work.

In addition, this embodiment has the following effects (a) to (d).
(A) The floor form 51' has a convex shape in the vicinity of the lower end of the sheath pipe 81 for concrete pouring, and the lower surface of the first lot 41 is finished in that shape. At some times, the concrete can be reliably filled up to the vicinity of the lower end opening (concrete discharge port) of the concrete placing sheath pipe 81. Further, the floor form 51' has a convex shape near the lower end of the extension portion (sheath pipe 82a) of the concrete casting sheath pipe 82, and the lower surface of the second lot 42 is finished in that shape. During the construction of the third lot 43, it is possible to reliably fill the concrete up to the vicinity of the lower end opening (concrete discharge port) of the extension portion (sheath tube 82a) of the concrete placing sheath tube 82.

(A) By using the above-described concrete placing sheath pipes 81 and 82 and vibrator sheath pipes 91 and 92, even in the case of main reinforcing bars arranged at a pitch of 300 mm or less (ctc300 or less), cutting and restoration of the reinforcing bars can be performed. There is no need, and the degree of freedom in bar arrangement is increased.

(C) By constructing at least a part of each of the side molds 52, 62, 72 with a transparent or semi-transparent acrylic plate or the like, it is possible to ensure the concrete while visually observing the casting height and compaction status of the concrete. Can be placed and compacted easily.

(D) Using the sheath pipes 81, 82 for concrete pouring and the sheath pipes 91, 92 for vibrators that are not used for concrete pouring work, while confirming the pouring height and compaction status of concrete with so-called red, The concrete can be poured and compacted reliably.

According to the present embodiment, the method of constructing a concrete skeleton (sidewalls 2, 3 and intermediate partition wall 4) is a method of constructing the concrete skeleton (sidewalls 2, 3 and intermediate partition wall 4) in a plurality of vertical lots (first By dividing into 1 lot 31, 41, 2nd lot 32, 42, 3rd lot 33, 43), the molds are rearranged in order from top to bottom and concrete is placed (for example, Installation of the first lot construction formwork 50, 50', placement of concrete in the first lot construction formwork 50, 50', removal of the first lot construction formwork 50, 50', second lot Installation of construction molds 60, 60', placement of concrete in the second lot construction molds 60, 60', removal of second lot construction molds 60, 60', third lot construction mold By installing the frames 70, 70', placing concrete in the third lot building form 70, 70', and removing the third lot building form 70, 70' in this order), the concrete frame This is a method of constructing (side walls 2 and 3, partition wall 4). The construction method of this concrete skeleton (side walls 2 and 3, partition wall 4) is such that the first tubular member for concrete placing work that extends in the vertical direction is surrounded by the inner surface of the first lot construction formwork 50, 50'. The first step (see FIGS. 4 and 14) of arranging the first lot 31, and the first lot 31 by placing concrete in the space surrounded by the inner surfaces of the first lot building molds 50, 50'. The second step of constructing 41 (see FIGS. 4 and 14) and the third step of removing the first lot constructing molds 50, 50' (see FIGS. 5 and 15) are included. The first tubular members (sheath pipes 81, 82 for concrete pouring, sheath pipes 91, 92 for vibrators) communicate between the upper side of the first lots 31, 41 and the lower side of the first lots 31, 41 (Fig. 6 and (See FIG. 16). As a result, the first tubular member (the sheath pipe 81 for concrete placing, the sheath pipe 91 for vibrator) is used for placing concrete in the second lots 32, 42 that are adjacently constructed below the first lots 31, 41. Can be used, the above-mentioned hopper 64 becomes unnecessary. Therefore, since the side part mold 62 can have a flat shape without the hopper 64, a normal flat plate-shaped mold can be used. Further, since the hopper 64 is not required, the above-mentioned extra concrete scrubbing work and surface finishing work can be omitted, so that the concrete skeleton (sidewalls 2, 3, the intermediate partition wall 4) can be efficiently used. Can be built.

Further, according to the present embodiment, before the concrete is placed in the first lot construction molds 50, 50 ′ in the second step, the first tubular member (the concrete placement sheath pipes 81, 82 ). , A first lid member for closing the lower surface opening of the vibrator sheath tubes 91, 92) is attached to the first tubular member (concrete casting sheath tubes 81, 82, vibrator sheath tubes 91, 92), and the third step is performed. After removing the first lot construction molds 50, 50' by removing the first lid member, the first lid member is removed from the first tubular member (sheath pipes 81, 82 for placing concrete, sheath pipes 91, 92 for vibrator) (Fig. 6 and FIG. 16). As a result, during the concrete pouring work at the time of constructing the first lots 31, 41, concrete is introduced from the lower surface opening of the first tubular member (the sheath pipes 81, 82 for concrete pouring, the sheath pipes 91, 92 for vibrators) to the inside. Inflow can be suppressed.

Further, according to the present embodiment, the method of constructing the concrete skeleton (sidewalls 2, 3, the partition wall 4) is the first method after removing the first lot construction formwork 50, 50' in the third step. By connecting the upper ends of the new tubular members (sheath pipes 82a, 92a) to the lower ends of the tubular members (the sheath pipe 82 for concrete pouring and the sheath pipe 92 for vibrators), the first tubular member (for concrete pouring) A fourth step (see FIGS. 7 and 17) of extending the sheath tube 82 and the vibrator sheath tube 92) downward, and installing the second lot construction molds 60 and 60′ below the first lots 31 and 41. Then, the fifth step of positioning the extension portion (sheath tube 82a, 92a) of the first tubular member in the space surrounded by the inner surfaces of the second lot building molds 60, 60' (see FIGS. 8 and 18). And a sixth step of constructing the second lots 32, 42 by placing concrete in a space surrounded by the inner surfaces of the second lot construction molds 60, 60' and the lower surfaces of the first lots 31, 41. (See FIGS. 8 and 18) and a seventh step (see FIGS. 9 and 19) of removing the second lot construction molds 60, 60′. The first tubular member (sheath pipe for concrete pouring 82, sheath pipe for vibrator 92) and its extension (sheath pipes 82a, 92a) are provided above the first lots 31, 41 and below the second lots 32, 42, respectively. To communicate with each other (see FIGS. 10 and 20). As a result, the first tubular member (the sheath pipe 82 for placing concrete, the sheath pipe 92 for vibrator) is used for placing concrete on the third lots 33, 43 that are adjacently constructed below the second lots 32, 42. Also, since the extension portion (sheath tubes 82a, 92a) can be used, the above-mentioned hopper is not necessary. Therefore, since the side part mold 72 can have a flat shape without a hopper, a normal flat plate-shaped mold can be used. In addition, since the hopper is not required, the above-mentioned extra concrete scrubbing work and surface finishing work can be omitted, so the concrete skeleton (sidewalls 2, 3 and partition wall 4) can be constructed efficiently. can do.

Further, according to the present embodiment, before the concrete is placed in the second lot construction form 60, 60′ in the sixth step, the extension portion (sheath pipe 82a, 92a) of the first tubular member is formed. The second lid member that closes the lower surface opening of the first tubular member is attached to the extension portion (sheath tubes 82a, 92a) of the first tubular member, and after removing the second lot building molds 60, 60' in the seventh step, The second lid member is removed from the extension portion (sheath tubes 82a, 92a) of the first tubular member (see FIGS. 10 and 20). As a result, it is possible to suppress the inflow of concrete into the interior from the lower surface opening of the extension portion (sheath pipes 82a, 92a) of the first tubular member during the concrete placing operation during the construction of the second lots 32, 42. ..

Further, according to the present embodiment, the method of constructing the concrete skeleton (sidewalls 2, 3, the intermediate partition wall 4) is the second method after removing the second lot construction formwork 60, 60′ in the seventh step. The eighth step (see FIGS. 11 and 21) of installing the third lot building molds 70, 70′ below the lots 32, 42, and the inner surface and second surface of the third lot building molds 70, 70′. A ninth step (see FIGS. 11 and 21) of constructing the third lots 33, 43 by placing concrete in the space surrounded by the bottom surfaces of the lots 32, 42, and the third lot construction form 70 , 70' is removed (see FIGS. 12 and 22). As a result, the first tubular member (sheath pipe for concrete placement 82, sheath pipe for vibrator 92) and its extension (sheath pipe 82a, for placing concrete in the third lot building form 70, 70'). 92a) can be used.

Further, according to the present embodiment, a plurality of first tubular members (sheath pipes for concrete pouring 82) each having an extension portion (sheath pipe 82a) are arranged at intervals in one horizontal direction (front-back direction). 11 (see FIGS. 11 and 21), in the ninth step, concrete is poured from one first tubular member (sheath tube 82 for pouring concrete) into the third lot building forms 70, 70′. A part of the cast concrete flows into the extension (sheath tube 82a) of another one first tubular member, and the inside of the extension (sheath tube 82a) of another one first tubular member After confirming that the concrete has risen, concrete is poured into the third lot construction formwork 70, 70' from the other one first tubular member (concrete placement sheath tube 82) (that is, Do the above-mentioned one-sided driving). As a result, the vertical length of the first lot 31, 41 and the second lot 32, 42 (that is, the vertical length of the concrete placing sheath pipe 82 and its extension (sheath pipe 82a)). The concrete pouring and filling of concrete can be carried out in one horizontal direction (front-rear direction) while applying concrete pouring pressure.

Further, according to the present embodiment, after the placement of the concrete into the third lot building molds 70, 70′ is completed, the first tubular member (the concrete placing sheath pipe 81, the vibrator sheath pipe 91). Then, concrete or mortar is filled inside the extension portion (sheath pipes 82a, 92a). Thereby, the first lots 31, 41 and the second lots 32, 42 can have a solid structure.

Further, according to the present embodiment, the method of constructing the concrete skeleton (sidewalls 2, 3, the partition wall 4) is the first method after removing the first lot construction formwork 50, 50' in the third step. The fourth step (see FIGS. 8 and 18) of installing the second lot building molds 60, 60′ below the lots 31, 41, and the inner surface and the first of the second lot building molds 60, 60′. A fifth step (see FIGS. 8 and 18) of constructing the second lots 32, 42 by placing concrete in the space surrounded by the lower surfaces of the lots 31, 41 (see FIGS. 8 and 18), and the second lot construction form 60. , 60' is removed (see FIGS. 9 and 19). Accordingly, the first tubular member (the sheath pipe 81 for concrete pouring, the sheath pipe 91 for vibrator) can be used for pouring concrete into the second lot building molds 60, 60'.

Further, according to this embodiment, a plurality of first tubular members (sheath pipes 81-1 for the concrete pouring, 81-2,...) Are arranged at intervals in one horizontal direction (front-back direction) (see FIG. 25 and FIG. 26), in the fifth step, concrete is poured from one first tubular member (sheath pipe 81-1 for concrete pouring) into the second lot building molds 60, 60′ ( 25(a) to (c)), a part of the cast concrete flows into another one of the first tubular members (the sheath pipe 81-2 for placing concrete) and the other one After confirming that the two first tubular members (sheath pipes 81-2 for concrete pouring) have risen (see FIG. 25(c)), the other one first tubular member (sheath for concrete pouring) Concrete is poured from the pipe 81-2) into the second lot building molds 60, 60′ (see FIGS. 26A and 26B). As a result, the concrete pouring and filling can be performed horizontally while the concrete pouring pressure is applied by the length of the first lot 31, 41 (that is, the vertical length of the sheath pipe 81 for concrete pouring). You can proceed in one direction (front-back direction).

Further, according to this embodiment, the first tubular member (the sheath pipe 81 for placing concrete, the sheath pipe 91 for vibrator) after the placement of the concrete into the second lot building molds 60, 60′ is completed. Fill the inside of with concrete or mortar. As a result, the first lots 31, 41 can have a solid structure.

Further, according to this embodiment, concrete can flow through the inside of the first tubular member (the sheath pipes 81 and 82 for concrete pouring) (see FIG. 23 ). Thereby, the concrete can be supplied into the second lot building molds 60 and 60′ by using the concrete placing sheath tube 81, and the third lot building molds 70 and 70′ can be supplied. The concrete can be supplied to the concrete using the sheath pipe 82 for concrete pouring.

Further, according to this embodiment, the vibrator 95 for compacting concrete can be inserted into the first tubular member (vibrator sheath tubes 91, 92) (see FIG. 24 ). As a result, by inserting the vibrator sheath tube 91 into the vibrator 95, the concrete in the second lot building molds 60, 60′ can be compacted, and the vibrator sheath tube 92 can be connected to the vibrator 95. Insertion can be performed to compact the concrete in the third lot building form 70, 70'.

According to this embodiment, the support piles 12 and 13 for supporting each lot are installed on the ground before constructing the first lots 31 and 41 (see FIGS. 3 and 13). Accordingly, the support piles 12 and 13 can function as support piles that support the concrete skeletons after the construction of the concrete skeletons (side walls 2 and 3, the partition wall 4).

Further, according to the present embodiment, the ground 11a is excavated prior to the installation of the first lot construction molds 50, 50' (see FIGS. 3 and 13). Further, after the first lots 31 and 41 are constructed (after the first lot construction molds 50 and 50′ are removed), and prior to the installation of the second lot construction molds 60 and 60′, The ground 11a is excavated (see FIGS. 6 and 16). Further, after the second lots 32, 42 are constructed (after the second lot construction forms 60, 60′ are removed), and prior to the installation of the third lot construction forms 70, 70′, The ground 11a is excavated (see FIGS. 10 and 20). Therefore, after excavating the ground to cover the entire concrete frame (side walls 2 and 3, partition wall 4), the concrete frame (side walls 2 and 3 and partition wall 4) is constructed by the normal winding method. It is possible to construct the concrete skeleton (side walls 2 and 3, the partition wall 4) in a short period of time compared to the above.

Next, a method for constructing the side wall 3 and the partition wall 4 according to the second embodiment of the present invention will be described with reference to FIGS. 28 to 31.
28 and 29 are diagrams showing a method of constructing the side wall 3 in the present embodiment, and correspond to FIGS. 4 and 8 described above. 30 and 31 are diagrams showing a method of constructing the partition wall 4 in the present embodiment, and correspond to FIGS. 14 and 18 described above.
Differences from the above-described first embodiment will be described.

As shown in FIG. 28, a plurality of through holes 55 are formed in the floor formwork 51, and the lower ends of the sheath pipes 81, 82 for concrete pouring and the sheath pipes 91, 92 for vibrators are respectively formed. Through the through hole 55 of the floor form 51. In this state, concrete is placed in the first lot construction mold 50. In addition, between the inner peripheral surface of each through hole 55 and the outer peripheral surface of each of the sheath pipes 81, 82 for concrete pouring and the sheath pipes 91, 92 for vibrators, a sealing material for suppressing the leakage of concrete ( (Not shown) is interposed.

As shown in FIG. 29, the lower end of each of the extension portion (sheath tube 82a) of the concrete placing sheath tube 82 and the extension portion (sheath tube 92a) of the vibrator sheath tube 92 has a floor formwork. The through hole 55 of 51 is penetrated. In this state, concrete is placed in the second lot construction mold 60. A sealant (not shown) is interposed between the inner peripheral surface of each through hole 55 and the outer peripheral surface of each of the sheath tubes 82a and 92a to prevent concrete from leaking.

As shown in FIG. 30, a plurality of through holes 55' are formed in the floor form 51', and the concrete placing sheath pipes 81, 82 and the vibrator sheath pipes 91, 92 are respectively provided. The lower end portion penetrates the through hole 55′ of the floor form 51′. In this state, concrete is placed in the first lot construction form 50'. In addition, a sealing material for suppressing the leakage of concrete is provided between the inner peripheral surface of each through hole 55′ and the outer peripheral surface of each of the sheath pipes 81, 82 for concrete pouring and the sheath pipes 91, 92 for vibrators. (Not shown) is interposed.

As shown in FIG. 31, with respect to the extension portion of the sheath pipe 82 for concrete pouring (sheath pipe 82a) and the extension portion of the sheath pipe 92 for vibrator (sheath pipe 92a), the lower end of each is the floor formwork. It passes through the through hole 55' of 51'. In this state, concrete is poured into the second lot construction mold 60'. A sealant (not shown) is interposed between the inner peripheral surface of each through hole 55' and the outer peripheral surface of each of the sheath tubes 82a and 92a to prevent concrete from leaking.

Particularly, according to the present embodiment, the through-holes 55, 55' are formed in the floor formwork 51, 51' constituting the first lot-building formwork 50, 50', and in the first step, The lower end of one tubular member (sheath pipes 81, 82 for concrete pouring, sheath pipes 91, 92 for vibrators) has through holes 55 in the floor molds 51, 51' of the first lot building molds 50, 50'. Go through 55'. This eliminates the need for the above-mentioned first lid member, so that the concrete skeleton (side walls 2 and 3, the partition wall 4) can be efficiently constructed.

Further, according to the present embodiment, through-holes 55, 55' are formed in the floor formwork 51, 51' constituting the second lot construction formwork 60, 60', and in the fifth step, The lower end portion of the extension portion (sheath pipes 82a, 92a) of the one tubular member penetrates through holes 55, 55' of the floor molds 51, 51' of the second lot building molds 60, 60'. This eliminates the need for the second lid member described above, so that the concrete skeleton (side walls 2 and 3, the partition wall 4) can be efficiently constructed.

In addition, in the above-mentioned 1st and 2nd embodiment, the uppermost part of the floor formwork 51' used for the construction of the partition wall 4 (the tip part of the top part 51a') is linearly convex upward (straight in the front-back direction). However, as long as the lower end of the sheath pipe 81 for concrete pouring and the lower end of the extension part (sheath pipe 82a) of the sheath pipe 82 for concrete pouring are adjacent to and oppose the uppermost part, The shape of the uppermost portion of the floor form 51' is not limited to this, and for example, the shape of the uppermost portion may be a dot shape corresponding to the apex of the conical shape.

Further, in the above-described first and second embodiments, an example in which the concrete placing pipe 85 is a steel pipe is shown, but the configuration of the concrete placing pipe 85 is not limited to this, and for example, the concrete placing pipe 85 is a rubber hose. May be Further, concrete may be poured by attaching a hopper to the upper end of the concrete pouring pipe 85.

In addition, in the above-described first and second embodiments, an example in which the concrete pouring pipe 85 is inserted into the concrete pouring sheath pipes 81 and 82 to pour concrete is shown. The concrete pouring sheath pipes 81 and 82 themselves may be used as concrete pouring pipes without inserting the pipe 85 into the concrete pouring sheath pipes 81 and 82. That is, the concrete may flow while contacting the inner surfaces of the concrete placing sheath pipes 81 and 82.

In addition, in the above-described first and second embodiments, as the concrete used for the above-mentioned one-sided pressing, ordinary concrete having a slump of 12 cm or less can be used. In this respect, by using high-fluidity concrete as the concrete used for the above-mentioned one-sided pouring, and filling the concrete in the concrete pouring sheath pipes 81, 82 (and in the sheath pipe 82a), it is possible to further increase the pressure. It is possible to place concrete and increase the filling property.

Further, in the above-described first and second embodiments, an example in which each of the vibrator sheath tubes 91, 92 is arranged in one row in a plan view is shown, but the thickness of the side walls 2, 3 and the partition wall 4 is shown. When (length in the left-right direction) is 1.5 m or more, each of the vibrator sheath tubes 91 and 92 may be arranged in two rows in a plan view, or may be so-called staggered arrangement.

Further, in the above-described first and second embodiments, the concrete skeleton (sidewalls 2 and 3 and the partition wall 4) to be constructed is divided into three lots in the vertical direction, but in addition, it is divided into two lots. Alternatively, it may be divided into any number of lots of four or more. The number of sheath pipes for concrete placing and sheath pipes for vibrators may increase or decrease according to the increase or decrease in the number of lots. For example, when dividing into four lots, a fourth lot is constructed below and adjacent to the third lots 33 and 43. In this case, a sheath pipe for placing concrete and a sheath pipe for vibrator for constructing the fourth lot are newly installed at the time of constructing the first lot 31, and the second lot 32 and the third lot 33 are constructed. At this time, for each of the concrete placing sheath pipe and the vibrator sheath pipe, a new sheath pipe may be added downward to extend as described above.

Moreover, in the above-mentioned 1st and 2nd embodiment, although the example which applied the construction method of the concrete skeleton which concerns on this invention to the side walls 2 and 3 and the partition wall 4 of the underground structure 1, it demonstrated. The application example of the concrete skeleton construction method is not limited to this. It goes without saying that the method of constructing a concrete skeleton according to the present invention may be applied to the construction of a side wall (side wall concrete) of a cylindrical underground structure such as a shaft or an underground tank.

Moreover, in the above-mentioned 1st and 2nd embodiment, although the construction method of the concrete skeleton which concerns on this invention was applied to the construction of wall-shaped concrete skeletons, such as the side walls 2 and 3, and the partition wall 4, in addition to this, Obviously, it may be applied to a columnar concrete skeleton.

Further, the illustrated embodiment is merely an example of the present invention, and the present invention is not limited to what is directly shown by the described embodiment, and various improvements made by those skilled in the art within the scope of the claims. It goes without saying that it includes changes.
The claims at the beginning of the application were as follows.
[Claim 1]
A method of constructing a concrete skeleton by dividing the concrete skeleton to be constructed into a plurality of lots in the vertical direction and placing the concrete by rearranging the formwork for each lot in order from top to bottom,
A first step of disposing a first tubular member extending in the vertical direction for concrete placing work in a space surrounded by the inner surface of the first lot-building formwork;
A second step of constructing the first lot by placing concrete in a space surrounded by the inner surface of the first lot construction formwork;
A third step of removing the first lot construction formwork,
Including
The said 1st tubular member is a construction method of a concrete skeleton which connects the upper part of said 1st lot, and the lower part of said 1st lot.
[Claim 2]
Prior to placing concrete in the first lot building mold in the second step, a first lid member for closing the lower surface opening of the first tubular member is attached to the first tubular member,
The method for constructing a concrete skeleton according to claim 1, wherein the first lid member is removed from the first tubular member after removing the first lot construction mold in the third step.
[Claim 3]
Through-holes are formed in the floor formwork forming the first lot construction formwork,
The method for constructing a concrete skeleton according to claim 1, wherein in the first step, a lower end portion of the first tubular member penetrates a through hole of a floor formwork of the first lot construction formwork.
[Claim 4]
The first tubular member is extended downward by connecting the upper end of a new tubular member to the lower end of the first tubular member after removing the first lot construction mold in the third step. A fourth step of
A fifth step of installing a second lot building mold below the first lot, and positioning an extension of the first tubular member in a space surrounded by an inner surface of the second lot building mold;
A sixth step of constructing a second lot by placing concrete in a space surrounded by the inner surface of the second lot construction mold and the lower surface of the first lot;
A seventh step of removing the second lot construction formwork,
Further including,
The said 1st tubular member and its extension part connect the upper part of the said 1st lot, and the lower part of the said 2nd lot, The construction method of the concrete skeleton according to any one of claims 1 to 3.
[Claim 5]
Prior to placing concrete in the second lot building mold in the sixth step, a second lid member for closing the lower surface opening of the extension portion of the first tubular member is extended to the first tubular member. Attached to the section,
The method for constructing a concrete skeleton according to claim 4, wherein the second lid member is removed from an extension portion of the first tubular member after removing the second lot construction mold in the seventh step.
[Claim 6]
Through-holes are formed in the floor formwork forming the second lot construction formwork,
The method for constructing a concrete skeleton according to claim 4, wherein in the fifth step, a lower end portion of the extension portion of the first tubular member penetrates a through hole of the floor formwork of the second lot construction formwork.
[Claim 7]
An eighth step of installing a third lot building mold below the second lot after removing the second lot building mold in the seventh step;
A ninth step of constructing a third lot by placing concrete in a space surrounded by the inner surface of the third lot construction mold and the lower surface of the second lot;
A tenth step of removing the third lot construction formwork,
The method for constructing a concrete skeleton according to any one of claims 4 to 6, further comprising:
[Claim 8]
A plurality of the first tubular members each having the extension are horizontally spaced apart in one direction,
In the ninth step, concrete is poured from one of the first tubular members into the third lot-building formwork, and a part of the cast concrete is another one of the first tubular members. After confirming that it has flowed into the extension part and has risen in the extension part of the another one of the first tubular members, the third lot-building formwork is started from the another one of the first tubular members. The method for constructing a concrete skeleton according to claim 7, wherein concrete is placed inside.
[Claim 9]
The concrete or mortar is filled into the inside of the first tubular member and the extension thereof after the placement of the concrete into the third lot building mold is completed. Construction method of concrete frame.
[Claim 10]
A fourth step of installing a second lot construction mold below the first lot after removing the first lot construction mold in the third step;
A fifth step of constructing a second lot by placing concrete in a space surrounded by the inner surface of the second lot construction mold and the lower surface of the first lot;
A sixth step of removing the second lot construction formwork,
The method for constructing a concrete skeleton according to any one of claims 1 to 3, further comprising:
[Claim 11]
A plurality of the first tubular members are arranged at intervals in one horizontal direction,
In the fifth step, concrete is poured from one of the first tubular members into the second lot-building formwork, and a part of the cast concrete is placed in another one of the first tubular members. After confirming that it has flowed into the other one of the first tubular members and has risen therein, concrete is poured from the another one of the first tubular members into the second lot construction formwork. The method for constructing a concrete skeleton according to claim 10.
[Claim 12]
The method for constructing a concrete skeleton according to claim 10 or 11, wherein concrete or mortar is filled inside the first tubular member after the placement of concrete into the second lot construction formwork is completed. ..
[Claim 13]
The method for constructing a concrete skeleton according to any one of claims 1 to 12, wherein concrete can flow inside the first tubular member.
[Claim 14]
The method for constructing a concrete skeleton according to any one of claims 1 to 7 and 10, wherein a vibrator for compacting concrete can be inserted into the first tubular member.
[Claim 15]
The method for constructing a concrete skeleton according to any one of claims 1 to 14, wherein a support pile for supporting each lot is installed on the ground prior to constructing the first lot.

1 Underground structure 2,3 Side wall 4 Partition wall 5 Bottom 6,7 Yamadome 8,9 Space 10 Ground 11, 11a Ground 12, 13 Support pile 14, 14a, 14b Suspended steel material 31 1st lot 32 2nd lot 33 Third lot 41 First lot 42 Second lot 43 Third lot 50, 50' First lot construction form 51, 51' Floor form 51a' Top 52 Side form 53 Fixture 55, 55' Through hole 60,60' 2nd lot construction formwork 62 side part formwork 64 hopper 64a concrete 70,70' 3rd lot construction formwork 72 side part formwork 81,81-1,81-2,81-3, 82 sheath pipe for concrete pouring 82a sheath pipe 85 concrete pouring pipes 91, 92 sheath pipe for vibrator 92a sheath pipe 95 vibrator

Claims (15)

A method of constructing a concrete skeleton by dividing the concrete skeleton to be constructed into a plurality of lots in the vertical direction and placing the concrete by rearranging the formwork for each lot in order from top to bottom,
A first step of disposing a first tubular member extending in the vertical direction for concrete placing work in a space surrounded by the inner surface of the first lot-building formwork;
A second step of constructing the first lot by placing concrete in a space surrounded by the inner surface of the first lot constructing mold;
A third step of removing the first lot construction formwork,
Including
In the method for constructing a concrete skeleton, the first tubular member connects the upper side of the first lot and the lower side of the first lot ,
Prior to placing concrete in the first lot construction mold in the second step, a first lid member, which is a cap that closes the lower surface opening of the first tubular member, is attached to the first tubular member. ,
The method for constructing a concrete skeleton, wherein the first lid member is removed from the first tubular member after removing the first lot construction mold in the third step . The concrete according to claim 1, wherein a lower end of the first tubular member whose lower surface opening is closed by the first lid member is located above an upper surface of a floor formwork forming the first lot construction formwork. How to build a body. A method of constructing a concrete skeleton by dividing the concrete skeleton to be constructed into a plurality of lots in the vertical direction and placing the concrete by changing the formwork for each lot in order from top to bottom,
A first step of disposing a first tubular member extending in the vertical direction for concrete placing work in a space surrounded by the inner surface of the first lot-building formwork;
A second step of constructing the first lot by placing concrete in a space surrounded by the inner surface of the first lot constructing mold;
A third step of removing the first lot construction formwork,
Including
In the method for constructing a concrete skeleton, the first tubular member connects the upper side of the first lot and the lower side of the first lot,
Through-holes are formed in the floor formwork forming the first lot construction formwork,
In the first step, the lower end of the first tubular member penetrates the through hole of the bed frame of the first lot for building formwork, how to build a concrete building frame. A method of constructing a concrete skeleton by dividing the concrete skeleton to be constructed into a plurality of lots in the vertical direction and placing the concrete by changing the formwork for each lot in order from top to bottom,
A first step of disposing a first tubular member extending in the vertical direction for concrete placing work in a space surrounded by the inner surface of the first lot-building formwork;
A second step of constructing the first lot by placing concrete in a space surrounded by the inner surface of the first lot constructing mold;
A third step of removing the first lot construction formwork,
Including
In the method for constructing a concrete skeleton, the first tubular member connects the upper side of the first lot and the lower side of the first lot,
The first tubular member is extended downward by connecting the upper end of a new tubular member to the lower end of the first tubular member after removing the first lot construction mold in the third step. A fourth step of
A fifth step of installing a second lot building mold below the first lot, and positioning an extension of the first tubular member in a space surrounded by an inner surface of the second lot building mold;
A sixth step of constructing a second lot by placing concrete in a space surrounded by the inner surface of the second lot construction mold and the lower surface of the first lot;
A seventh step of removing the second lot construction formwork,
Further including,
Wherein the first tubular member and its extension, the communicating the lower upper and the second lot in the first lot, concrete building frame construction method of. Prior to placing concrete in the second lot building mold in the sixth step, a second lid member for closing the lower surface opening of the extension portion of the first tubular member is extended to the first tubular member. Attached to the section,
The method for constructing a concrete skeleton according to claim 4, wherein the second lid member is removed from an extension portion of the first tubular member after removing the second lot construction mold in the seventh step. Through-holes are formed in the floor formwork forming the second lot construction formwork,
Wherein in the fifth step, the lower end portion of the extension portion of the first tubular member penetrates the through hole of the bed frame of the second lot for building formwork, method for constructing a concrete skeleton according to claim 4. An eighth step of installing a third lot building mold below the second lot after removing the second lot building mold in the seventh step;
A ninth step of constructing a third lot by placing concrete in a space surrounded by the inner surface of the third lot construction mold and the lower surface of the second lot;
A tenth step of removing the third lot construction formwork,
The method for constructing a concrete skeleton according to any one of claims 4 to 6, further comprising: A plurality of the first tubular members each having the extension are horizontally spaced apart in one direction,
In the ninth step, concrete is poured from one of the first tubular members into the third lot-building formwork, and a part of the cast concrete is another one of the first tubular members. After confirming that it has flowed into the extension part and has risen in the extension part of the another one of the first tubular members, the third lot-building formwork is started from the another one of the first tubular members. The method for constructing a concrete skeleton according to claim 7, wherein concrete is placed inside. The concrete or mortar is filled into the inside of the first tubular member and the extension thereof after the placement of the concrete into the third lot building mold is completed. Construction method of concrete frame. A method of constructing a concrete skeleton by dividing the concrete skeleton to be constructed into a plurality of lots in the vertical direction and placing the concrete by changing the formwork for each lot in order from top to bottom,
A first step of disposing a first tubular member extending in the vertical direction for concrete placing work in a space surrounded by the inner surface of the first lot-building formwork;
A second step of constructing the first lot by placing concrete in a space surrounded by the inner surface of the first lot constructing mold;
A third step of removing the first lot construction formwork,
Including
In the method for constructing a concrete skeleton, the first tubular member connects the upper side of the first lot and the lower side of the first lot,
A fourth step of installing a second lot construction mold below the first lot after removing the first lot construction mold in the third step;
A fifth step of constructing a second lot by placing concrete in a space surrounded by the inner surface of the second lot construction mold and the lower surface of the first lot;
A sixth step of removing the second lot construction formwork,
Further comprising, a method for constructing a concrete building frame a. A plurality of the first tubular members are arranged at intervals in one horizontal direction,
In the fifth step, concrete is poured from one of the first tubular members into the second lot-building formwork, and a part of the cast concrete is placed in another one of the first tubular members. After confirming that it has flowed into the other one of the first tubular members and has risen therein, concrete is poured from the another one of the first tubular members into the second lot construction formwork. The method for constructing a concrete skeleton according to claim 10. The method for constructing a concrete skeleton according to claim 10 or 11, wherein concrete or mortar is filled inside the first tubular member after the placement of concrete into the second lot construction formwork is completed. .. The method for constructing a concrete skeleton according to any one of claims 1 to 12, wherein concrete can flow through the inside of the first tubular member. The method for constructing a concrete skeleton according to any one of claims 1 to 7 and 10, wherein a vibrator for compacting concrete can be inserted into the first tubular member. The method for constructing a concrete skeleton according to any one of claims 1 to 14, wherein a support pile for supporting each lot is installed on the ground prior to constructing the first lot.