JP3481848B2 - Formwork for manufacturing hexagonal segments - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of constructing a tunnel by a shield method, in which a large number of tunnels are installed on the inner surface of the excavation ground and connected to each other. The present invention relates to a hexagonal segment manufacturing form for manufacturing a hexagonal segment forming a curved portion, among hexagonal segments forming a wall. 2. Description of the Related Art A shield construction method used as a method of constructing a tunnel is to excavate the ground with a shield machine, form a drill hole, and install a number of segments on the inner surface of the drill hole behind the drill hole. This is a method of constructing a tunnel by connecting these together. The segment used for this method is a plate-like body with a constant thickness that curves along the inner surface of the excavation hole, and its plan view shape is generally a rectangular shape such as a rectangle, but recently a hexagonal shape has been adopted. Have been. This hexagonal segment is installed along the inner surface of the excavation hole with the symmetry lines on the left and right (in the actual installation state, in the axial direction of the excavation hole) and up and down, and the symmetry lines on the left and right are aligned with the circumferential direction of the tunnel. Type. [0005] FIG. 5 shows the use of the above hexagonal segment.
1 schematically shows a tunnel wall body 10 being formed in the ground by a shield method. This tunnel wall 10 is
A number of concrete hexagonal segments are mounted cylindrically on the inner surface of the borehole and are connected to one another. The direction in which the tunnel wall 10 is formed (the direction in which the shield machine is excavated) is the direction of arrow Q,
This figure shows a state in which a curved portion R is being formed from the straight line portion S. The straight line portion S is formed by joining a plurality of hexagonal segments 11 of one type. The hexagonal segments 11 are symmetrical in the left and right (in the actual installation state, the axial direction of the excavation hole), and vertically, and vertically. It is an arc plate-like body having a hexagonal shape in plan view and having a slightly longer direction and curved along the inner surface in the circumferential direction of the excavation hole, and is installed along the inner surface of the excavation hole. The curved portion R has a plurality of bent portions 9 along the circumferential direction, and is formed by bending the bent portions 9 by a predetermined angle. Therefore, this curved part 9
In this example, a hexagonal segment 16 bent at the center and a hexagonal segment 17 having a joint end face formed in a tapered shape are used. The hexagonal segments 11, 1
As shown in FIG. 6, each of the plugs 6 and 17 has a plug 32 and a socket 33 which are fitted to each other on the joint end surface 31 composed of a hypotenuse.
Thereby, positioning of the joining end surfaces 31 and prevention of misalignment are performed. In addition, an insert nut 34 is provided on one side of the joining surface 31 formed by the oblique sides to be joined to each other, and a bolt inserted into the inner sheath tube 35 from the side surface of the other segment is fastened. ing. The hexagonal segments 11, 1
Each of the sheath tubes 6 and 17 is provided with a sheath tube 36 in the width direction thereof. Long bolts connected to each other are inserted into the sheath tubes 36, and these hexagonal segments 11 and 16 are tightened by fastening these long bolts. , 17 are joined to each other. Then, the hexagonal segment 1 having the above shape
As shown in FIG. 7, the molds for producing 1, 16, 17
A bottom plate 41 and side plates 4 provided on both sides of the bottom plate 41
2 and a substantially V-shaped end plate 4 provided at both ends of the bottom plate 41
Concrete is poured into the concrete placing space S surrounded by the bottom plate 41, the side plates 42, and the end plates 43, so that the hexagonal segments 11, 16, and 17 are formed. I have. The formwork includes a side plate 42 and an end plate 43 in which the hexagonal segments 11, 16, 1
7 can be moved in a direction away from it. And
A pair of end plate members 43a constituting the end plate 43 of the mold frame are formed with a concave portion 44 for forming the plug 32 and a convex portion 45 for forming the socket 33, respectively. An attachment mechanism (not shown) is provided on the end plate member 43a on one side, and the insert nut 34 is supported by the attachment mechanism. However, the mold for moving the side plate 42 and the end plate 43 requires a respective moving mechanism, so that it becomes extremely complicated and large-scale.
For this reason, a mold having a structure in which the plug 32 provided on the joint end surface 31 formed by the oblique side can be detached even if the end plate 43 is fixed is used. That is, in the mold having this structure, a molding member for molding the socket 33, a molding hole for molding the mounting hole for mounting the insert nut 34 and the post-installed plug, and a molding member for molding the positioning recess are provided on the end plate 43. The support is released by the mounting mechanism, and the support is released when the mold is removed, and the molded member and the insert nut 34 are removed together with the hexagonal segments 11, 16, and 17. The hexagonal segments 16 and 17 constituting the inner curved portion R having the bent portion 9 of the tunnel wall 10 described above are used for the straight portion S. Since the inclination angle and the like of the joint end face 31 are different from those of the normal hexagonal segment 11, the mounting angle and the position of the molding member and the insert nut 34 to be mounted on the mold may need to be shifted, and in this case, These molded member and insert nut 3
4 has to be replaced, and there has been a problem that a great deal of trouble is required for the mounting and removing operation. SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a hexagonal segment manufacturing mold which can be easily adapted to the shape of the joint end surface to be formed. [0010] In order to achieve the above object, a hexagonal segment manufacturing form according to claim 1 is formed in a hexagonal shape in plan view, and is joined to each other in a drilled hole. A hexagonal segment manufacturing form for manufacturing a concrete hexagonal segment forming a cylindrical tunnel wall by using a bottom plate, side plates provided on both sides of the bottom plate, and both end portions of the bottom plate And a space surrounded by the bottom plate, the side plates and the end plates is a concrete casting space, and at least one of the side plates and the end plates on one side. both or either are the concrete設空between side the bottom plate
Molding surface and has been liner having a predetermined taper angle is mounted detachably against, on the liner, is provided attachment mechanism for holding the various members protruded at a predetermined angle to the molding surface side, said liner is the side plate or end plate is attached, when Ru attaching the liner is characterized in that housing hole portion is formed to be housed by inserting the rear end portion of the attachment mechanism. In other words, when molding various hexagonal segments with different angles of the joint end face, by replacing the liner, the mounting mechanism is installed according to the angle and the side plate or end plate is attached.
Do not insert the rear end of the mounting mechanism into the formed storage hole.
Then, easily attach the liner to the side plate or end plate.
It becomes possible. An embodiment of a mold for manufacturing hexagonal segments according to the present invention will be described below with reference to the drawings. FIG.
1 shows a mold for manufacturing hexagonal segments (hereinafter referred to as a mold) according to an embodiment of the present invention. The mold 40 exemplified here includes a bottom plate 41 for forming the inner peripheral surfaces of the hexagonal segments 11, 16, and 17, an arc-shaped side plate 42 provided on both sides of the bottom plate 41, and And an end plate 43 connecting both ends. End plate 43
Has a pair of end plate members 43a, each of which is disposed above the bottom plate 41 in a substantially V-shape in plan view. And the concrete casting space S formed by the bottom plate 41, the side plates 42, and the end plates 43,
The shape conforms to the shape of the hexagonal segments 11, 16, 17 to be formed. In addition, the side plate 42 is a bottom plate 41.
The surface on the side of the concrete placing space S is made perpendicular to the base plate 41 and can be moved in a direction away from the bottom plate 41. In addition, this formwork 40 has its end plate 4
3 is fixed to the bottom plate 41. An end plate 43 is provided on one side of the mold having the above structure.
The liner 51 is removably attached to the end plate member 43a. The liner 51 has a molding surface 52 on the concrete casting space S side of the formwork 40, and the hexagonal segments 11, 16, 1 and 2 are formed by the molding surface 52.
The joining end surface 31 on one side of the side 7 is formed. The liner 51 attached to the end plate member 43a is provided with a plurality of attachment mechanisms 53, as shown in FIG. As shown in FIG. 3, these mounting mechanisms 53 include a holding bracket 54 and a frame 55 fixed to the liner 51, and a mounting bolt 56 slidably supported by the holding bracket 54 and the frame 55. And
The tip of the mounting bolt 56 projects from the hole 51 a formed in the liner 51 toward the molding surface 52 at a predetermined angle with respect to the molding surface 52. The threaded portion of the mounting bolt 56 projecting toward the molding surface 52 is screwed into a molding member 57 for forming a socket, an insert nut 34 and a molding member 58 for forming a recess for attaching a retrofit plug. By screwing, the molding members 57 and 58 and the insert nut 34 are attached to the molding surface 52 of the liner 51. As shown in FIG. 4, storage holes 61 are formed in the end plate member 43a to which the liners 51 are attached.
Is attached, the rear end side of the attachment mechanism 53 provided on the liner 51 is inserted and stored. Next, the case where the hexagonal segments 11, 16 and 17 are manufactured using the mold 40 will be described. First, the molding surface 52 is the hexagonal segment 1 to be manufactured.
The liner 51 having an inclined surface corresponding to the inclination angle of the taper of the joining end surface 31 of 1, 16, 17 is attached to the end plate member 43a on one side. Here, when attaching the liner 51 to the end plate member 43a, the rear end of the attachment mechanism 53 provided on the liner 51 is inserted into the storage hole 61 formed in the end plate member 43a. Next, on the molding surface 52 side of the liner 51 attached to the end plate member 43a, a molding member 57 for socket molding, an insert nut 34, and a molding member 58 for concave portion molding for attaching a retrofit plug are attached by respective attaching mechanisms 53.
Further, the sheath tubes 35 and 36 are disposed between the other end plate member 43a and the side plate 42 on the opposite side and between the side plates 42. The forming members 57 and 58 are also attached to the other end plate member 43a by an attaching mechanism (not shown). In this state, the bottom plate 41, the side plate 42,
Concrete is poured into the concrete placing space S surrounded by the liner 51 on one side and the end plate member 43a on the other side. After the concrete is hardened, the mounting bolt portion 56 of the mounting mechanism 53 of the liner 51 mounted on the end plate member 43 on one side and the mounting bolt portion of the mounting mechanism 53 on the end plate member 43 on the other side are turned. As it is loosened, the side plate 42 is moved outward to separate it from the molded hexagonal segments 11,16,17. Then, in this state, the molded hexagonal segments 11, 16, 17 are pulled up and removed from the mold, and the molded members 57, 58 are removed from the joint end face 31 on the hypotenuse. In this way, the joint end surface 31 on one side is formed at a predetermined angle by the molding surface 52 of the liner 51, and the socket 33, the insert nut 34, and the plug mounting recess are respectively joined to the joint end surface 31 on the oblique side. Hexagonal segments 11, 16, 17, which are molded or mounted at an angle to the end face 3, are manufactured. In particular, when manufacturing hexagonal segments 16 and 17 of another special shape having different taper angles of the joint end surfaces 31, the hexagonal segments 16 and 17 to be manufactured are manufactured.
The liners 51 corresponding to the taper angles of the joint end surfaces 31 are attached to the end plate members 43a on one side, and thereafter, the above operation is performed. As described above, according to the hexagonal segment manufacturing mold 40 of the above embodiment, the molding surface 52 is formed on the liner 51 detachably attached to the end plate member 43a.
Is provided with an attachment mechanism 53 for holding various members, so that when the hexagonal segments 11, 16, 17 having different angles of the joint end face 31 are formed, the attachment mechanism 5 is formed.
All you have to do is replace 3 with every liner 51. Therefore,
Compared with the conventional case in which the mounting mechanism is re-attached to the end plate member 43a in accordance with the angle of the joining end surface 31 to be formed, the labor required for manufacturing hexagonal segments can be greatly reduced. In the above-described example, the case where the liner 51 is detachably provided on the end plate 43 has been described. However, the side plate 42 and the side plate 42 on one side of the mold 40 are adapted to the shape of the hexagonal segments 11, 16, and 17. Liners may be detachably provided on both end plates 43, or liners may be provided only on the side plates 42. As described above, according to the mold for manufacturing hexagonal segments of the present invention, the following effects can be obtained. According to the mold for manufacturing a hexagonal segment according to the first aspect, the liner detachably attached to at least one of the side plate and the end plate on at least one side, and various members are held on the molding surface thereof. since is provided with a mounting mechanism for, when the angle of the joint end face forming the different various hexagonal segments, an attachment mechanism may only replace each liner, therefore, as in the prior art, the joining end face for molding Compared with the conventional formwork that refits the mounting mechanism according to the angle, the labor required for the hexagonal segment manufacturing work can be significantly reduced , and the storage hole formed in the side plate or end plate The liner can be easily attached to the side plate or the end plate while inserting the rear end of the attachment mechanism into the end plate.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of a mold for explaining the configuration and structure of a mold for manufacturing a hexagonal segment according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of an end plate member to which a liner is attached for explaining the configuration and structure of a hexagonal segment manufacturing formwork according to the embodiment of the present invention. FIG. 3 is a longitudinal sectional view of an end plate member to which a liner is attached for explaining the configuration and structure of a hexagonal segment manufacturing formwork according to the embodiment of the present invention. FIG. 4 is a rear view of an end plate member to which a liner is attached for explaining the configuration and structure of the hexagonal segment manufacturing formwork according to the embodiment of the present invention. FIG. 5 is a perspective view of a tunnel wall showing a tunnel wall constructed using hexagonal segments. FIG. 6 is a plan view of a hexagonal segment illustrating a shape and a joint structure of the hexagonal segment constituting the tunnel wall. FIG. 7 is a plan view of a mold for explaining the configuration and structure of a conventional mold for manufacturing hexagonal segments. [Description of Signs] 11, 16, 17 Hexagonal segment 34 Insert nut (member) 41 Bottom plate 42 Side plate 43 End plate 51 Liner 52 Molding surface 53 Mounting mechanism 57, 58 Molding member (member) 61 Storage hole S Concrete casting space

──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Hiroki Someya 1-12-1 Yurakucho, Chiyoda-ku, Tokyo Inside Ishikawajima Building Materials Industry Co., Ltd. (72) Inventor Shuichi Nishimura 1-12-1 Yurakucho, Chiyoda-ku, Tokyo Ishikawajima Inside the Construction Materials Industry Co., Ltd. (72) Inventor Akio Hashiguchi 1-1-12 Yurakucho, Chiyoda-ku, Tokyo Ishikawajima Construction Materials Industry Co., Ltd. (56) References JP-A-5-116127 (JP, A) JP-A-63- 307904 (JP, A) JP-A-61-283505 (JP, A) JP-A-58-84207 (JP, U) JP-A-58-192009 (JP, U) JP-A-51-61352 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B28B 1/00-23/22 E21D 11/08

Claims (1)

(1) A hexagon for forming a concrete hexagonal segment formed in a hexagonal shape in plan view and joined to each other in an excavation hole to form a cylindrical tunnel wall body. A frame for producing a rectangular segment, comprising: a bottom plate; side plates provided on both sides of the bottom plate; and substantially V-shaped end plates provided at both ends of the bottom plate. and a space surrounded by the end plates, it is the inter-concrete設空, to either or both of the side plates and the end plate at least one side side, concrete設空between side the bottom
A liner having a molding surface having a predetermined taper angle with respect to the plate is detachably attached, and the liner is provided with an attachment mechanism for holding various members projecting at a predetermined angle on the molding surface side , wherein the liner plate or end plate is attached, when Ru attaching the liner, the rear end portion of said mounting mechanism
Hexagonal segment manufacturing mold, characterized in that the housing hole portion is formed to insert and to allow housing the.