JPH0612126Y2 - Formwork and manufacturing apparatus for segment for multi-walled tubular wall body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial field of application" The present invention relates to a mold and manufacturing apparatus for a segment used for constructing a multi-walled tubular wall body.

"Prior Art" In recent years, as a large-section shield construction method for constructing a large-section tunnel structure such as a railway tunnel, what has been called a double-circle special section shield construction method has come into use. This construction method uses a shield excavator with a structure in which a plurality of cylindrical shield excavators are connected, and excavates the ground or the ground in a cross-sectional shape in which a plurality of circles are partly overlapped in a continuous shape, On the inner surface of the excavated hole, segments are assembled to form a tubular wall body and a plurality of the tubular wall bodies are connected along the hole (primary lining), and the rear surface of the segment of the primary lining, that is, After filling the voids between the segment and the ground, fill the inner surface of the primary lining with concrete (secondary lining), and support the ground with them to create a predetermined inner space. It is to compose.

Therefore, conventionally, as the cylindrical wall body constructed by the above-mentioned construction method, the one shown in FIG. 4 is known.

The cylindrical wall body shown in the figure is an arc-shaped RC segment 1, 1
..Connecting the main walls 2 with a C-shaped cross section and an inverted C-shaped cross section
2 is constructed, the branch RC segments 3, 3 are connected between the upper end portions and the lower end portions of these main wall portions 2, 2, and the middle pillar 4 is built between the branch RC segments 3, 3 located above and below. In this case, the eyeglass frame-shaped wall bodies constructed in this manner are sequentially connected in the axial direction of the excavation hole.

RC segment 1 and branching portion R constituting the above cylindrical wall body
The C segment 3 and the center pillar 4 are connected by bolts and nuts, and the above-mentioned respective members are joint metal fittings 6, 6 in which bolt insertion holes 5 are formed as connecting portions by bolts and nuts.
・ ・ Is buried.

The branch RC segment 3 is required for the construction of the tubular wall body, and the branch RC segment 3 is a Y-shaped member in appearance. That is, this branching RC segment 3
Is a base 7 having a rectangular cross section whose end face is connected to the center pillar 4.
And connecting end portions 8 and 9 each having a rectangular cross section and branched from the base portion 7 and connected to the main wall portions 2 and 2, respectively. Here, of the two connecting arm portions, the connecting arm portion 9 is formed to project longer than the connecting arm portion 8. Further, the connecting arm portion 9 has its tip end side extending in an arc shape with the same radius of curvature as the RC segment 1. One of the connecting arm portions 8 and 9 is long and the other is short.
In order to arrange the RC segments 1, 1 ..., and the branching RC segments 3, 3, ... in a staggered manner in the axial direction of the tubular wall body (they are arranged in a staggered manner to increase the compressive strength of the tubular wall body). For)
Is.

By the way, conventionally, the molds shown in FIGS. 5 and 6 have been used for molding the above-mentioned branching RC segment 3.

In FIG. 5 and FIG. 6, 11 is a bottom formwork. The bottom formwork 11 is for molding the lower surface of the branch RC segment 3, and at the upper ends of the side walls 12 thereof, a molding wall 13 is formed along the shape of the lower surface of the branch RC segment 3. On the upper portions of the side walls 12, 12 of the bottom formwork 11,
Side plate 1 for forming side surface of branching RC segment 3
4, 14 are attached. The side plates 14, 14 are supported by a supporting member (not shown) fixed to the side walls 12, 12 and can be moved by a certain dimension from the position shown in the figure to the side of the side walls 12, 12 (the direction of the arrow). Also,
The left and right ends of the side walls 12, 12 have protruding wall portions 15,
15 are formed, and arm portions 17 and 17 of end plates 16 and 16 are rotatably attached to these protruding wall portions 15 and 15 via shaft bodies 18 and 18, respectively. The end plates 16 and 16 are end faces of the branch RC segment 3, that is, the connecting arm portions 8,
9 is a member for molding the end surface of 9. These end plates 1
Reference numerals 6 and 16 are rotatable about shafts 18 and 18 from the positions shown in the drawings in the directions of the arrows and vice versa. It is designed to be locked in the position shown.

When the branching RC segment is molded by the above mold, the side plates 14 and 14 and the end plates 16 and 16 are clamped (positioned in the state shown in the figure), and the joint metal fitting 6 is placed inside the mold.
Placing the concrete with the internal reinforcing bars with Then, a pressing lid (not shown) is arranged on the upper surface of the concrete to solidify the concrete. After the concrete is solidified, the mold is removed, and the molding is completed.

"Problems to be Solved by the Invention" This invention is intended to solve the following problems in the above-mentioned formwork.

That is, in the above-mentioned mold, a pressing lid had to be separately prepared, and after the concrete was cast, the pressing lid had to be placed on the upper surface of the concrete. Therefore, there is a problem that it takes time to transport the pressing lid and also time to adjust the position of the pressing lid. Further, at the time of placing concrete, the connecting arm portion 8 of the RC portion 3 of the branch portion,
There was a problem that air bubbles were accumulated in 9 and the quality of the branch RC segment 3 was deteriorated.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a formwork and a manufacturing apparatus for a segment for a multiple-walled tubular wall body, in which a pressing lid can be easily arranged during concrete pouring, and concrete. An object of the present invention is to provide an apparatus for manufacturing a segment for a multiple-walled tubular wall body, which allows air bubbles inside the mold to escape during casting and can form a high-quality branched RC segment.

"Means for Solving the Problem" The present invention has an appearance Y in which a base portion and two connecting arm portions branched from one end of the base portion are provided, and the other connecting arm portion projects longer than the other connecting arm portion. A letter-shaped segment is a mold for molding the base portion downward, a bottom mold for molding the lower surface of the segment, a pair of side plates for molding the side surfaces of the segment, and two In a formwork of a segment for a multiple-walled tubular wall body, which comprises two end plates for forming an end face of a connecting arm portion, a holding lid for forming an upper surface of the segment is provided in any one of the end plates. It is rotatably attached to one side.

Further, the present invention provides a mold having the above structure, a guide means for swinging the mold in a pendulum shape, a driving means for moving the mold body along the guide means, and a guide means for moving the mold to the guide means and And a holding unit that can be held in a tilted state by the driving unit.

[Embodiment] An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

First, a first embodiment will be described with reference to FIGS. 1 and 2. The formwork shown in FIGS. 1 and 2 is for molding the branching RC segment 3 shown in FIG. 4 with the base 7 facing downward. In FIG. 1 and FIG. 2, 21 is a bottom formwork. The bottom mold 21 is for molding the lower surface of the branching RC segment 3, and at the upper ends of the side walls 22, 22, a molding wall 23 is formed along the shape of the lower surface of the branching RC segment 3. The side wall 22 of this bottom formwork 21,
Side plates 24, 24 for molding the side surface of the branch RC segment 3 are attached to the upper portion of 22. The side plates 24, 24 are supported by a support member (not shown) fixed to the side walls 22, 22, and the side walls 22,
It is configured such that it can be moved by a certain dimension to the side of 22 (in the direction of the arrow). Further, projecting wall portions 25, 25 are formed at both left and right end portions of the side walls 22, 22, and the projecting wall portions 25, 25 have arm portions 27a, 2b of the end plates 26a, 26b.
7b is rotatably attached via shafts 28. End plates 26a and 26b are branched RC segment 3
Is a member for molding the end faces of the connecting arm portions 8 and 9, respectively. These end plates 26a, 26b
Are rotatable about the shafts 28, 28 from the illustrated position in the direction of the arrow and in the opposite direction, respectively, and are brought to the illustrated position by a locking mechanism (not shown) when the branch RC segment 3 is molded. It is designed to be locked. Further, the end plate 26a that forms the short connecting arm portion 8 is formed with a protruding portion 29, and the pressing lid 3 is attached to the protruding portion 29.
0 is rotatably attached via a shaft 31.
The pressing lid 30 is for molding the upper surface of the branching RC segment 3, and an injection hole 32 for injecting concrete is formed in the center thereof.

When molding the branched RC segment 3 with the above-mentioned frame, the side plates 24, 24 and the end plates 26, 26 are clamped (positioned in the state shown in the figure), and the pressing lid 30 is rotated to open. An internal reinforcing bar having a joint fitting 6 is arranged inside the form, and the pressing lid 30 is further rotated to be closed, and concrete is filled from the pouring hole 32. Then, the injection hole 32 is sealed and the concrete is solidified. After the concrete is solidified, the mold is removed, and the molding is completed.

In the above-mentioned formwork, since the pressing lid 30 is rotatably attached, it is not necessary to separately prepare and carry the pressing lid 30 at the time of pouring concrete, and further adjust the position thereof. There is no need. Therefore, the pressing lid 30 can be easily arranged.

Next, a second embodiment will be described with reference to FIG. The manufacturing apparatus of the second embodiment uses the mold of the first embodiment.

In FIG. 3, reference numeral 33 is a mold, and the mold 33 is a first mold.
It is an improvement of the formwork shown in FIGS. That is, two axles 34, 34 are attached to the bottom formwork 21 perpendicularly to the side walls 22, 22.
Wheels 35, 35 ... Are rotatably attached via 4, 34. A link joint 37 is provided on the right end surface 36 of the bottom mold 21 so as to project therefrom.

Reference numeral 38 is a guide plate curved in an arc shape. Grooves (guide means) 39, 39 into which the wheels 35, 35 ... Fit, are formed in the guide plate 38 in the circumferential direction on the surface of the small diameter side, and the mold 33 is formed along the grooves 39, 39. Can be swung like a pendulum in the direction of the arrow shown in the figure and in the opposite direction. The guide plate 38 is fixed to the bottom plate 42 of the outer frame 41 via the ribs 40, 40. The outer frame 41 is an L-shaped one composed of a bottom plate 42 and a short plate 43. Short board 43
A link joint 44 is projectingly provided on the mold side. Formwork 3
The link joint 37 formed in 3 and the link joint 44 formed in the outer frame 40 are connected by a hydraulic cylinder 45 (driving means, holding means). The hydraulic cylinder 45 is
The piston 46 is provided with a cylinder portion 47 that reciprocates therein. The tip end portion of the piston 46 is the link joint 37, and the base end of the cylinder portion 47 is the link joint 44.
Are rotatably connected to each other via pins 48. By controlling the hydraulic cylinder 45, the form 3
3 can be moved along the guide plate 38, and the form 33 can be held in an inclined position at any position on the guide plate 38.

When the branching RC segment 3 is molded by the above manufacturing apparatus, the mold 33 is clamped, the internal reinforcing bar having the joint fitting 6 is arranged inside the mold, and the pressing lid 30 is closed. The hydraulic cylinder 45 is operated to store the piston 46 in the cylinder portion 47. In this way, the mold 33 is moved in the direction opposite to the arrow shown in the figure along the groove 39, the mold 33 is tilted, and the upper end of the space to be the connecting arm 8 is held by the pressing lid 3.
Hold below the lowest part of 0. In this state, concrete is injected from the injection hole 32 to the height of the injection hole 32.

Next, the hydraulic cylinder 45 is operated to extend the piston 46 from the cylinder portion 47. In this way
9 is moved in the direction of the arrow shown in the figure to incline the form 33 so that the upper end of the space to be the connecting arm 9 is the injection hole 3
Hold below 2. In this state, concrete is injected from the injection hole 32 to fill the inside of the form 33, and the injection hole 32 is sealed. After the concrete is solidified, the mold is removed, and the molding is completed.

By performing the molding in this manner, it is possible to manufacture a high-quality branched RC segment in the connecting arms 8 and 9 without collecting air bubbles during concrete pouring. Moreover,
Since the mold 33, which is an improved form of the mold of the first embodiment, is used and the pressing lid 30 is rotatably attached, the pressing lid 30 is separately prepared and transported during concrete pouring. There is no need to move it and no further adjustment of its position is required. Therefore, the pressing lid 30 can be easily arranged.

[Advantage of Invention] According to this invention, since the pressing lid is rotatably attached to the form itself, there is no need to separately prepare and transport the pressing lid when pouring concrete. There is no need to adjust its position. Therefore, the pressing lid can be easily arranged.

Further, according to the manufacturing apparatus of claim 2, a guide means for swinging the mold body in a pendulum shape, a driving means for moving the mold body along the guide means, and the mold body for guiding the mold body. And holding means capable of holding in a tilted state by the driving means,
The mold body is swung to one side and tilted to allow air bubbles to escape from one connecting arm portion, concrete is poured, and the form body is further swung to the other and tilted to form another connecting arm portion. It is possible to take a manufacturing process of pouring concrete while letting air bubbles escape from it, and it is possible to manufacture a high-quality branched RC segment without collecting air bubbles in the two connecting arms that branch from one end of the base. .

[Brief description of drawings]

1 and 2 are views showing a first embodiment of the present invention, in which FIG. 1 is a front view in which some members of the mold are omitted, and FIG. 2 is FIG. 1 II- It is a II sectional view. FIG. 3 is a view showing a second embodiment of the present invention, and is a front view of a manufacturing apparatus with some members omitted, and FIG. 4 is a front view of a double-walled tubular wall body, and FIG. 6 and 6 are views showing the structure of a conventional mold, FIG. 5 is a front view in which some members of the mold are omitted, and FIG. 6 is a view taken along line VI-VI in FIG. FIG. 3 ... Branch RC segment, 7 ... Base, 8, 9 ...
Connecting arm, 21 ... bottom form, 24 ... side plate, 26a ...
… End plate, 26b …… End plate, 30 …… Pressing lid, 33 ……
Formwork, 35 ... Wheels, 38 ... Guide plate, 39 ... Groove (guide means), 45 ... Hydraulic cylinder (driving means, holding means).

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Sadahiro Wakabayashi 2-6-21 Yaesu, Chuo-ku, Tokyo Rose Bay Yaesu Building Ishikawajima Kenzai Industrial Co., Ltd. In-house

Claims (2)

[Scope of utility model registration request] 1. A Y-shaped external segment having a base and two connecting arms branching from one end of the base, the other connecting arm projecting longer than the one connecting arm. Is a mold for molding downward, wherein a bottom mold for molding the lower surface of the segment, a pair of side plates for molding the side faces of the segment, and the end faces of the two connecting arm parts are molded. In a frame form of a segment for a multiple-walled tubular wall body having two end plates for holding, a pressing lid for molding the upper surface of the segment is rotatably attached to either one of the end plates. A formwork of a segment for a multiple-walled tubular wall body, which is characterized in that 2. A mold according to claim 1, guide means for swinging the mold like a pendulum, driving means for moving the mold body along the guide means, and the guide means for guiding the mold. And a holding means capable of holding the vehicle in a tilted state by a driving means, the apparatus for manufacturing a segment for a multiple-walled tubular wall body.