JP6022207B2 - Telescopic formwork device - Google Patents

Description

  The present invention relates to a telescopic formwork apparatus, and more particularly to a telescopic formwork apparatus that can move an invert frame portion easily and flexibly.

  In a tunnel lining formwork apparatus, a cylindrical formwork is arranged in a tunnel cross-sectional space, a placement space is formed between the outer periphery and the tunnel inner peripheral surface, and the placement space is covered. Concrete is being poured. The formwork in this case is often composed of a top frame portion (form) that forms a cylindrical top portion, a side frame portion that forms a side portion, and an invert frame portion that forms a bottom portion.

  For example, in the movable frame device disclosed in Patent Document 1, the left and right side frame portions are rotatably connected to the left and right ends of the top end frame portion, and the invert frame portion is provided at the lower ends of the left and right side frame portions. Each divided piece divided into right and left is connected in a rotatable manner. When removing the mold after completing the curing of the lining concrete, rotate the left and right divided pieces of the invert frame part upward and fold it along the side frame part, and then the left and right side frame parts inward It is made to detach | leave from the inner peripheral surface of lining concrete by rotating and lowering | hanging a top end frame part and making a formwork into a rectangular contracted state.

JP-A-8-232585

  However, the above conventional structure is a structure in which the divided pieces of the invert frame part are further rotatably connected to the lower ends of the left and right side frame parts, so that the structure of the mold is complicated and the degree of freedom of the shape is increased. In particular, this is because the mold is divided into a plurality of molds in the longitudinal direction of the tunnel to form mold pieces, and a predetermined number of the mold pieces in the part of the mold pieces that have been placed with the lining concrete A so-called telescopic mold apparatus is a big problem in that the diameter of the piece is reduced and the cross section space of the remaining mold piece is moved to the opposite position.

  Therefore, the present invention solves such a problem, and an object of the present invention is to provide a telescopic formwork apparatus in which the structure of the formwork is simplified and the degree of freedom of the shape is improved.

In order to achieve the above object, according to the first aspect of the present invention, a placement space for lining concrete is disposed between the outer periphery of the tunnel (T) and the inner peripheral surface of the tunnel (T). The mold (1) forming S) is divided into a plurality of molds (11) in the longitudinal direction of the tunnel (T) to form a mold piece (11), and a predetermined number of the mold pieces in the part where the lining concrete has been placed. In the telescopic formwork apparatus in which the mold pieces (11A, 11B) are reduced in diameter and passed through the cross-sectional space of the remaining form pieces (11) and moved to the opposite positions, 11) is divided into a substantially arc-shaped invert frame portion (3) constituting the bottom portion and the other main frame portion (2), and is lifted through the cross-sectional space of the mold frame (1) ( 7), and the main frame is positioned in a reduced diameter in the cross-sectional space of the remaining mold piece (11) The sectional space of (2), so as to convey toward the opposite position is passed through the substantially circular arc-shaped invert frame portion lifting by the lifting transfer apparatus (7) (3), said mold (11) A beam body (5) that penetrates the cross-sectional space and is supported at the inner peripheral surface of the tunnel is provided, and the mold body pieces (11) are positioned and supported by the beam body (5), and the beam body The end of (5) was positioned in the formwork pieces (11A, 11B) located in the portion where the placement of the lining concrete in the tunnel lower half space (T2) was completed, and the tunnel upper half space (T1). The buoyancy receiving stand (6) is positioned and supported on the inner peripheral surface of the tunnel (T).

According to the first aspect of the invention, the substantially arc-plate shaped invert frame portion is separated from the main frame portion and can be lifted and transported in the same shape without being folded, so that the formwork structure can be simplified and the main frame can be realized. Since it is not necessary to fold the invert frame into the part, the degree of freedom of the form shape is also improved. In addition, since each formwork piece is positioned and supported by the beam body when placing the lining concrete, the number of support members for directly supporting each formwork piece on the inner periphery of the tunnel can be reduced, and its installation The effort of is reduced. Furthermore, the end of the beam body can be reliably supported on the inner peripheral surface of the tunnel when casting the lining concrete in the tunnel partitioned into the upper and lower spaces.

In the second aspect of the invention , the beam body (5) can be self-propelled in the longitudinal direction of the mold (1), and the main frame portion (2) having a reduced diameter is supported by the beam body (5). The beam body (5) is moved integrally with the beam body (5), and the lifting and conveying device (7) is provided on the beam body (5).

According to the second aspect of the present invention , the main frame portion can be moved using the beam body that positions and supports the formwork piece during concrete placement, and the lifting and conveying device can be easily installed on the beam body.

  The reference numerals in the parentheses indicate the correspondence with specific means described in the embodiments described later.

  As described above, according to the telescopic formwork apparatus of the present invention, the structure of the formwork is simplified and the degree of freedom of the shape is also improved.

It is a longitudinal cross-sectional view of the tunnel in which the telescopic formwork apparatus was installed. It is sectional drawing along the II-II line in FIG. It is sectional drawing along the III-III line in FIG. It is a longitudinal cross-sectional view of the tunnel which shows the mold piece moving process of a telescopic type | mold form apparatus. It is a longitudinal cross-sectional view of the tunnel which shows the mold piece moving process of a telescopic type | mold form apparatus. It is a longitudinal cross-sectional view of the tunnel which shows the mold piece moving process of a telescopic type | mold form apparatus.

  The embodiment described below is merely an example, and various design improvements made by those skilled in the art without departing from the gist of the present invention are also included in the scope of the present invention.

FIG. 1 shows the entire side surface of the telescopic formwork apparatus H installed in the tunnel T, FIG. 2 shows a cross section taken along line II-II in FIG. 1, and FIG. 3 shows III-III in FIG. A cross section along the line is shown. In each figure, the inner space of the tunnel T is divided into an upper half T1 and a lower half T2, and a telescopic formwork device (hereinafter simply referred to as a formwork device) H is located in the lower half space T2 of the tunnel T. ing. The formwork 1 of the formwork apparatus H is divided into a plurality (eight in this embodiment) formwork pieces 11 of a fixed length in the tunnel longitudinal direction. Each mold piece 11 has a substantially semicircular cylindrical shape facing downward along the cross-sectional shape of the lower half space T2 of the tunnel T (FIG. 2), and the upper half main frame portion 2 and the bottom invert frame portion. 3.

  The main frame portion 2 has a top end frame portion 21 extending horizontally in the width direction of the tunnel T at the upper end, and left and right ends extending downward while being curved outwardly and connected to the left and right ends thereof, respectively. Side frame portion 22. The invert frame portion 3 has a substantially arcuate plate shape having an arc circumferential surface parallel to the bottom portion of the tunnel T, and its left and right end surfaces 31a and 31b are formed as inclined surfaces, and the lower end surfaces of the left and right side frame portions 22 respectively. Abutting and matching. The invert frame portion 3 is supported by being floated upward from the bottom surface of the tunnel T by a support shaft 41 at four locations in the left-right direction. Further, the side frame portion 22 is also supported by the support shaft 42 so as to be separated from the side surface of the tunnel T inward by a predetermined distance.

  In FIG. 1, a beam body 5 is provided that extends in the longitudinal direction of the tunnel T through the cross-sectional space of the mold 1. In the beam body 5, a wheel 511 at the lower end of the leg 51 provided at the front and rear positions of the intermediate portion in the longitudinal direction is driven by the motor 512, and the rail 32 (FIG. 2) of the invert frame 3 is moved in the longitudinal direction of the mold 1. Self-propelled. The beam body 5 is provided with support members 52 and 53 extending in the vertical direction at the upper and lower positions of its end exposed from the opening of the mold 1, and these support members 52 and 53 are in contact with the upper and lower surfaces of the tunnel T. Thus, one end of the beam body 5 is positioned and supported.

  A top end frame portion 21 is supported on the beam body 5 via a jack 43 (FIG. 2), and a plurality of appropriate positions are provided between the beam body 5 and the side frame portion 22 and the invert frame portion 3. A rod jack 44 is installed to position the beam body 5 and the mold 1. In particular, the other end of the beam body 5 is supported by the formwork pieces 11A and 11B located at the portion where the placement of the lining concrete has been completed via the bar jack 44. In this state, the secondary lining concrete is poured into the placement space S formed above the top end frame portion 21 and between the side frame portion 22 and the invert frame portion 3 and the inner peripheral surface of the tunnel T. (The horizontal upper surface of the poured concrete is shown by the thick broken line in FIG. 2).

  In addition, the code | symbol F in FIG. 2 has simplified and shown the reinforcing bar installed in the tunnel T space. Further, in the upper half space T1 of the tunnel T, a buoyancy support stand 6 capable of self-propelled by lowering the wheel 61 (FIG. 1) is disposed, and the jack 62 is extended upward to be on the inner peripheral surface of the tunnel T. The buoyancy from below is received by the contact.

  A lifting and conveying device 7 is provided in the lower half of the beam body 5, and the conveying device 7 is an I-shaped steel rail body 71 (FIG. 2, FIG. 2) disposed over almost the entire length of the beam body 5. 3) and a hoist 72 provided with a pair of front and rear chain blocks 73 (FIG. 1) which are arranged to run freely along this and are connected to each other.

  After injecting the lining concrete and finishing the curing, the mold piece 11 is removed. For this purpose, the support shafts 52 and 53, the jack 44 and the like are removed, and the beam body 5 is moved into the left frame body 1 as shown in FIG. The formwork piece 11 to be performed (a pair of adjacent formwork pieces 11A and 11B in this embodiment) is positioned between the front and rear legs 51. In addition, the code | symbol 81 in a figure is a trolley | bogie provided with the rail connected to the rail of the invert frame part 3. FIG. In the following drawings, X is existing concrete, and Y is new concrete.

  Subsequently, the side frame portion 22 of the mold pieces 11A and 11B to be removed is rotated inward by a cylinder (not shown) as shown by a chain line in FIG. 2, and the jack 43 is removed to remove the top end frame portion. 21 is lowered to bring the main frame 2 into a reduced diameter state. Thereby, the main frame 2 is detached from the inner peripheral surface of the lining concrete in a state where the main frame 2 is supported by the beam body 5. The main frame portion 2 in the reduced diameter state has a size that can be accommodated in the cross-sectional space of the remaining mold piece 11 that has not been reduced in diameter, and as shown in FIG. 4 (2), both the mold frame pieces 11A and 11B are reduced. The beam body 5 in a state of supporting the main frame portion 2 having a diameter is moved outward of the frame body 1, and the pair of front and rear chain blocks 73 of the lifting and conveying device 7 provided on the beam body 5 are moved to the above-mentioned formwork. The pieces 11A and 11B are positioned above the invert frame 3. At this time, the main frame portion 2 of the mold piece 11A, 11B moves into the cross-sectional space of the remaining mold piece 11 that is not reduced in diameter.

  Thereafter, the invert frame 3 attached with the lifting jig 74 (FIG. 2) and connected to each other is lifted by the front and rear chain blocks 73 (chain line in FIG. 5 (1)), and the lifted invert frame 3 is used as the beam body. As shown in FIG. 5 (2), it is transported outward along 5 and passed through the cross-sectional space of the reduced main frame 2 (chain line in FIG. 2, solid line in FIG. 5 (1)). Take it out of the frame 1. And these invert frame parts 3 are installed adjacent to the invert frame part 3 of the mold piece 11 of the outermost end, as shown in FIG. 6 (1). 5 and 6, the shape of the invert frame 3 is different between the state installed at the bottom of the tunnel T and the state suspended by the chain block 73, but this is a different cross section of the invert frame 3. Is actually the same thing.

  After the invert frame 3 is installed, as shown in FIG. 6B, the main frame of the mold pieces 11A and 11B that are positioned in the frame 1 by moving the beam body 5 further outward. The part 2 is exposed to the outside of the frame body 1, and the main frame part 2 is expanded in diameter to the original shape and connected to the invert frame part 3 again. By repeating the above steps, the formwork pieces 11 constituting the formwork 1 can be moved sequentially. In addition, the code | symbol 82 in FIG. 6 (2) is a trolley | bogie provided with the rail connected to the rail of the invert frame part 3. FIG.

  In the above embodiment, the telescopic formwork apparatus provided with the beam body has been described. However, the present invention can also be applied to a telescopic formwork apparatus having a structure in which the beam body is not provided. Moreover, although the said embodiment demonstrated use of the telescopic formwork apparatus in the tunnel divided into the upper half and the lower half, a tunnel structure is not specifically limited.

DESCRIPTION OF SYMBOLS 1 ... Formwork, 11, 11A, 11B ... Formwork piece, 2 ... Main frame part, 3 ... Invert frame part, 5 ... Beam body, 6 ... Buoyancy receiving stand, 7 ... Lifting conveyance apparatus, S ... Concrete placement space , T ... tunnel, T1 ... upper half space of tunnel, T2 ... lower half space of tunnel.

Claims (2)

The formwork that is arranged in a tubular shape in the tunnel cross-sectional space and forms the lining concrete placement space between the outer periphery and the tunnel inner peripheral surface is divided into a plurality of pieces in the longitudinal direction of the tunnel to form a formwork piece, Telescopic type that reduces the diameter of a predetermined number of mold pieces in the part of the mold pieces that have been placed with lining concrete and moves them to the opposite position through the cross-sectional space of the remaining mold pieces In the formwork device, each formwork piece is divided into an approximately arc-plate shaped invert frame part constituting the bottom part and the other main frame part, and a lifting and conveying device is provided through the cross-sectional space of the formwork. Then, the substantially arc-shaped invert frame part lifted by the lifting and conveying device is passed through the cross-sectional space of the main frame part, which is positioned in a reduced-diameter state in the cross-sectional space of the remaining mold piece, to the opposite position. so as to convey toward, through the cross-sectional space of said mold A beam body whose both ends are supported on the inner peripheral surface of the tunnel is provided, the mold pieces are positioned and supported by the beam body, and the end of the beam body is placed on the lining concrete in the lower half space of the tunnel A telescopic formwork apparatus characterized in that it is positioned and supported on the inner peripheral surface of a tunnel by a formwork piece located in a completed portion and a buoyancy receiving stand placed in an upper half space of the tunnel . The beam body can be self-propelled in the longitudinal direction of the formwork, the main frame portion having a reduced diameter is supported by the beam body and moved together with the beam body, and the beam body is lifted by the beam body The telescopic formwork apparatus of Claim 1 which provided the conveying apparatus.

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