JP7171052B2 - How to assemble the center - Google Patents

Description

The present invention relates to a method of assembling a center, an apparatus having a mold for molding tunnel lining concrete.

When this type of center is constructed and the tunnel lining concrete is formed by the center, a front dome-shaped face plate group as a whole forming a forming mold is supported on a supporting device installed on the ground of the tunnel. . Then, concrete is placed between the outer peripheral surface of the face plate group and the inner wall of the tunnel to form the tunnel lining concrete.

By the way, the center support device has a support frame on its lower side, and this support frame can run via wheels on rails laid in the tunnel along the extension direction of the tunnel. This support frame is erected on the ground using a long member such as a pipe material without being placed on a rail at the initial stage of assembly of the Centol support device. The pipe material is fixed to the support frame by a binding material such as a band or a clamp metal fitting, and is leaned obliquely against the ground like a support rod to temporarily set the support frame in an upright state.

After that, other members are assembled between adjacent support frames, and the pipe material is removed after the support frames are in a stable state such as a portal shape.
As described above, in the above-described conventional assembly method, the support frame is supported in an upright state by a pipe material or the like that is leaned obliquely on the ground. Therefore, the pipe material may slip on the ground or come off the support frame, and the stability of the support frame in the upright state is poor, resulting in efficient assembly of the center. There is a problem with that.

Since the center is dismantled in substantially the reverse order of assembly, the above-described problems arise in the same way as assembly.
In order to solve these problems, a center assembly method disclosed in Patent Document 1 was proposed. In the assembling method described in Patent Document 1, without using the pipe material, assembling auxiliary members such as H-shaped steel are installed between the legs located on both sides of the center so that the legs can be prevented from overturning. It is what I did. Therefore, the assembly of the center can be stably performed.

JP 2017-166312 A

Using the technique disclosed in Patent Document 1, the support frame of the support device can be constructed in a stable state. However, in addition to the support device, auxiliary assembly members to be installed between the legs are required, so it is necessary to transport and store the auxiliary assembly members to the tunnel construction site in addition to the components of the center. there were. Further, since the auxiliary assembly member is interposed between the legs on both sides which are spaced apart from each other, it is long, large, and heavy. For this reason, it is necessary to procure a large truck or secure a large storage space for transporting the auxiliary assembly members, and it takes time and effort to handle the auxiliary assembly members.

SUMMARY OF THE INVENTION An object of the present invention is to facilitate assembly of a center without requiring a large and heavy dedicated assembly auxiliary member.

In order to achieve the above objects, the method for assembling a center of the present invention comprises a support device and an arch-shaped concrete formwork supported by the support device, and tunnel lining concrete is laid by the concrete formwork. In the method of assembling a center for molding, an assembly assisting member for assisting erection of the legs of the support device is formed of an elongated structural member other than the legs of the support device, and assists in the assembly. The member is connected to the lower end of the leg, and the auxiliary assembly member is installed on the ground so as to intersect the extension direction of the tunnel.

Therefore, in the present invention, since the constituent members of the center are used in the assembly of the center, the number of auxiliary assembly members can be reduced, and the burden of transportation and management can be reduced.

ADVANTAGE OF THE INVENTION According to this invention, there exists an effect that a center can be easily assembled using an assembly auxiliary member.

Sectional drawing of the tunnel construction part which shows a center. Side view of the center. Side view of the skeleton of the center. A perspective view of a scaffolding frame. The front view of the state which attached the scaffolding frame to the 1st leg. Sectional drawing of the state which similarly attached the scaffolding frame to the 1st leg. The top view of the state which similarly attached the scaffolding frame to the 1st leg. The top view of the state which connected a pair of scaffolding frames. The side view of the state which set up the support frame by the scaffolding frame. The front view of a jack member. 4 is a perspective view of the main body of the jacking member; FIG. A perspective view of an adapter. The schematic diagram which shows the state which installed the scaffolding frame. (a) is a schematic diagram showing a state in which the first leg is installed, and (b) is a schematic diagram showing a state in which the wheel is separated from the rail. (a) is a schematic diagram showing a state in which the first leg is lifted, and (b) is a schematic diagram showing a state in which the wheels are positioned on the rail. (a) is a schematic diagram showing a state in which the first leg is positioned on the rail 203, and (b) is a schematic diagram showing a state in which the wheels are separated from the rail.

(embodiment)
Embodiments embodying the present invention will be described below with reference to the drawings.
First, the center 11 will be described.

As shown in FIGS. 1 and 2, the center 11 is for molding concrete 200 that is cast along the inner wall surface of a tunnel 201. As shown in FIG. A rail 203 is laid on the ground 202 of the tunnel 201 along the extension direction of the tunnel 201 .

As shown in FIGS. 1 and 3, the center 11 has a support device 12, and the support device 12 has support frames 13 at left and right positions, respectively. The support frame 13 includes a girder member 18 extending in the longitudinal direction, which is the direction in which the rail 203 extends, first legs 14 positioned at both front and rear ends of the girder member 18, and second legs 14 positioned in the vicinity of the first legs 14. legs 16; The lower end of the first leg 14 incorporates a leg jack 62 that is extended and retracted by a driving device 61 with a built-in motor (not shown). be. The vertical position of the second leg 16 is adjusted by changing the positional relationship between a plurality of holes 63 and pins 64 made up of bolts and nuts inserted through the holes 63 .

The first leg 14 is installed on the ground 202 of the tunnel 201 at a position sandwiching the rail 203 via the interposed member 15 . A wheel 17 is attached to the lower end of the second leg 16 so as to be able to roll on the rail 203 . The interposition member 15 is detachable from the first leg 14 . The wheels 17 can be placed on rails 203 , and the center 11 is moved along the rails 203 while the wheels 17 are placed on the rails 203 .

As shown in FIGS. 1 and 3, a plurality of erection frames 21 are erected at approximately equal intervals between the upper parts of the girder members 18 of the left and right support frames 13 at a plurality of front and rear positions. The construction frames 21 adjacent to each other in the front and rear are connected and fixed to each other by a lateral frame (not shown). A plurality of frames 23 arranged in the longitudinal direction are supported on the installation frame 21 via a plurality of receiving members 22 so as to form a rib-like shape as a whole. A plurality of face plates 24 are attached to the outside of the. The group of face plates 24 as a whole constitutes an arch-shaped concrete formwork, and the inner surface of the lining concrete 200 is formed by this concrete hollow form.

As shown in FIGS. 1 to 3, a support plate 25 is fixed to the horizontal frame between the erection frames 21. On the lower surface of the support plate 25, two elongated members made of H-shaped steel are mounted. A scaffolding frame 26 is secured at its longitudinal midsection by bolts and nuts (both not shown). A scaffolding 28 made of a mesh plate (not shown) is fixed to both ends of the upper surface of the scaffolding frame 26 by bolts and nuts (both not shown) on the outer frame around the scaffolding frame 26 .

FIG. 4 shows the scaffolding frame 26, and two insertion holes 29a to 29e are arranged side by side from both ends thereof. Among the through holes 29a to 29e, the bolt for fixing the support plate 25 is inserted through the through hole 29d, and the bolt for fixing the scaffold 28 is inserted through the through hole 29a.

Next, a method for assembling the center 11 will be described.
First, as shown in FIGS. 5, 6 and 13, the disassembled scaffolding frame 26 constituting part of the center 11 is mounted on rails 203 extending in the direction of extension of the tunnel 201 at the intermediate portion in the longitudinal direction thereof. , so as to intersect the extension direction of the rail 203 at a right angle. The scaffolding frame 26 may intersect the rails 203 at right angles to a slight angle. In this case, as shown in FIGS. 6 and 7 to 9, two scaffolding frames 26 are installed in parallel, and jack members 41 are connected between the upper surfaces of both ends by bolts 42 and nuts 43. In addition, an adapter 55 is connected by a bolt 56 and a nut 57 between the upper surfaces of the intermediate portions. In this case, when connecting the jack member 41, the bolt 42 is inserted through the insertion holes 29b and 29c of the scaffolding frame 26, and when connecting the adapter 55, the bolt 56 is inserted through 29e.

As shown in FIGS. 10 and 11, in the jack member 41, a female screw cylinder 45 is reinforced by a reinforcing plate 46 and penetrates through the central portion of a mounting plate 44 which is the main body of the jack member 41. there is A male screw 47 is screwed into the female screw cylinder 45 , and a mounting plate 48 is fixed to the lower end of the male screw 47 . A set screw 49 is screwed to the lower portion of the male screw 47 to prevent loosening. Insertion holes 50 through which the bolts 42 are inserted are provided at the four corners of the mounting plate 44 .

As shown in FIG. 12, the adapter 55 is formed by processing a body 58 of sheet metal into an uneven shape and reinforcing it with a reinforcing plate 59. A hole 60 is provided therethrough. A plurality of types of adapters 55 with different heights may be prepared according to the length of the first leg 14, etc. In such cases, adapters with appropriate heights are selected and used. .

Then, as shown in FIGS. 6 to 8, the mounting plate 44 of the jack member 41 is placed on the upper surfaces of both scaffolding frames 26 in a suspended state, and the insertion holes 50, 29b, and 29c of the mounting plate 44 and the scaffolding frame 26 are mounted. A bolt 42 is passed through and a nut 43 is screwed onto the bolt 42 . Also, the adapter 55 is placed on the upper surface of both scaffolding frames 26 in a suspended state, the bolts 56 are passed through the insertion holes 60 and 29e of the adapters 55 and the scaffolding frames 26, and the nuts 57 are screwed. In this way, both scaffolding frames 26 are paired in parallel and fixed by the jack member 41 and the adapter 55 , and the male screw 47 of the jack member 41 is positioned between both scaffolding frames 26 .

In this case, before installing the scaffolding frame 26 on the rail 203, at least one of the jack member 41 and the adapter 55 is attached to the pair of both scaffolding frames 26, and both scaffolding frames 26 are installed on the rail 203, The other of jack member 41 and adapter 55 may then be attached to scaffolding frame 26 . Alternatively, both the jack members 41 and the adapters 55 may be attached to the pair of scaffolding frames 26 before the scaffolding frames 26 are installed on the rails 203 . That is, the order of setting the scaffolding frame 26 on the rails 203 and attaching the jack member 41 and the adapter 55 to the scaffolding frame 26 may be arbitrary.

When the scaffolding frame 26 is positioned on the rail 203, the height of the male screw 47 of the jack member 41 is adjusted by the action of the screw to adjust the height position of the installation plate 48, as shown in FIGS. As shown at 13, the mounting plate 48 is placed on the ground 202 and the scaffolding frame 26 can be leveled. In this state, the scaffolding frame 26 intersects the extending direction of the rails 203 at right angles.

In the above state, as shown in FIGS. 5, 6, 9 and 14(a), the first leg 14 of the support frame 13 is placed on the adapter 55, and the lower end of the first leg 14 is It is fixed by bolts 42 and nuts 43 . At this time, as shown in FIGS. 9 and 14B, the second leg 16 is adjusted to the upper position so that the wheel 17 is separated from the upper surface of the rail 203 upward. 6 and 9, an adapter 51 different from the adapter 55 is attached to the lower end of the first leg 14, but this adapter 51 may It may not be used because it is attached to the

By doing so, the support frame 13 can be erected in a stable state without falling down. That is, as shown in FIGS. 1, 3 and 9, the support frame 13 extends in the longitudinal direction along the rails 203, but the scaffolding frame 26 extends in the direction orthogonal to the rails 203. , the support frame 13 at the left and right positions can be stably maintained in an upright state.

Then, in this state, as shown in FIGS. 1 and 3 , a plurality of installation frames 21 are fixed between the beam members 18 of the left and right support frames 13 . In this case, since the support frame 13 is stably maintained in an upright state, the construction frame 21 can be assembled easily and accurately. When the erection frame 21 is assembled, the assembly 19 of the support frame 13 and the erection frame 21 as a whole forms a gate shape and is in a stable state.

The leg jacks 62 of the first leg 14 are then extended to lift the assembly 19 . In this state, the second leg 16 is placed at the lower position, and the wheel 17 is installed on the rail 203 as shown in FIG. 15(b). In this way the weight of the assembly 19 can be supported by the wheels 17 . In this state, the leg jacks 62 are contracted to float the scaffolding frame 26 from the upper surface of the rails 203 .

Next, the bolts 56 and nuts 57 between the adapter 55 on the lower side of the first leg 14 and the scaffolding frame 26 are disconnected, and the scaffolding frame 26 is attached to the first leg 14 as shown in FIG. 15(a). After that, the scaffolding frame 26 is extracted from the position of the lower end of the first leg 14. - 特許庁Alternatively, first, the bolt 56 and nut 57 between the adapter 55 and the scaffolding frame 26 are disconnected, then the first leg 14 is raised, and the scaffolding frame 26 is pulled out from the lower end of the first leg 14. may The order of separation from the first leg 14 of the adapter 55 or from the scaffolding frame 26 does not matter. Also, the adapter 55 may be separated from the scaffolding frame 26 depending on the length of the first leg 14 and other conditions, but may be used as it is without being separated from the first leg 14 .

Next, by extending the leg jack 62 of the first leg 14, as shown in FIG. 16(a), the lower end of the first leg 14 is placed on the upper surface of the rail 203, and the lower end of the first leg 14 is separated from the ground. 202, the interposed member 15 shown in FIG. After that, the second leg 16 is placed in the upper position, and the wheel 17 is separated upward from the rail 203 as shown in FIG. 16(b). In this way, the first leg 14 , that is, the assembly 19 can be supported on the ground 202 by the interposed member 15 .

In this state, various members such as the frame 23 and the face plate 24 are assembled on the assembly 19. As shown in FIG. At this time, the jack member 41 and the adapter 51 are removed from the scaffolding frame 26, and the scaffolding frame 26 is attached to the mounting plate 44 in its original position.

In this way, the center 11 can be assembled, and the lining concrete 200 can be formed by the group of face plates 24 .
After the lining concrete 200 is formed, the wheels 17 are placed at the lower position and the interposition member 15 is removed. can.

When disassembling the center 11, the interposing member 15 is interposed between the first leg 14 and the ground 202, and the receiving member 22, framework 23, scaffolding frame 26, etc. are disassembled. With the wheels 17 positioned at the lower position and supported by the rails 203 , the lower ends of the first legs 14 are lifted from the upper surface of the rails 203 by the leg jacks 62 . In this state, using the scaffolding frame 26 disassembled from the center 11, the scaffolding frame 26 is installed on the rail 203 so as to form a right angle with the rail 203 in the same manner as described above, and the jack member 41 and the adapter 55 are attached. Install. Thereafter, the first leg 14 is moved downward by the leg jack 62 to connect the first leg 14 onto the scaffolding frame 26, and the wheels 17 are moved to the upper position. After that, the operations are carried out in substantially the reverse order of the rail assembly.

This embodiment has the following effects.
(1) When assembling and dismantling the center 11, a scaffolding frame 26 made of a long member is arranged at the lower end of the first leg 14 so as to extend in a direction perpendicular to the extending direction of the rails 203, and the scaffolding frame 26 is used to support the support frame. Support 13. Therefore, unlike the conventional art, the support frame 13 extending in the extension direction of the rail 203 can be held in an upright state by using the scaffolding frame 26, which is a constituent member of the center 11, as an auxiliary assembly member without using a pipe material. , the overturning of the support frame 13 can be appropriately avoided, and the assembly work and dismantling work of the center 11 can be performed smoothly and efficiently.

(2) Since two scaffolding frames 26 arranged in parallel are used as a set in a state where they are connected by the jack members 41 and the adapters 55, the scaffolding frames 26 can be installed in a stable state.

(3) Since the adapters 55 and 51 are interposed between the lower end of the first leg 14 and the scaffolding frame 26, if a plurality of types of adapters 55 and 51 with different heights are prepared, the length of the first leg 14 can be changed. can accommodate differences in

(4) Since the scaffold frame 26 is used as a scaffold for the center 11, there is no need to prepare a dedicated member for preventing the support frame 13 from falling down. That is, after using the scaffolding frame 26 as a member for preventing overturning, the scaffolding frame 26 can be incorporated into the center 11 . Therefore, when assembling the center 11, the burden of transporting and storing members other than the components of the center 11 can be reduced. Moreover, since the scaffolding frame 26 does not bear the load of the support frame 13 by connecting the left and right first legs 14 arranged at a distance, it does not need to be long and sturdy. Therefore, handling of the scaffold frame 26 is easy. Although the jack member 41 and the adapter 55 are not used in constructing the center 11, they are small and lightweight, so they hardly become a burden for transportation and storage.

(Change example)
The present invention is not limited to the above embodiments, and can be embodied in the following aspects.

o Omit the adapters 55 and 51;
- The jack member 41 is omitted, and instead of the jack member 41, a concrete block or steel material is used between the lower end of the scaffolding frame 26 connected to the lower end of the first leg 14 and the ground 202.

- In the above embodiment, two parallel scaffolding frames 26 are connected to the lower end of the first leg 14, but only one. In this case, it is preferable to provide two male screws 47 of the jack member 41 and arrange the male screws 47 on both sides of the scaffolding frame 26 .

(Other technical ideas)
The following technical ideas can be grasped from the above embodiment and modifications.
(A) A center demolition method comprising a supporting device and an arch-shaped concrete formwork supported by the supporting device, wherein the concrete formwork is used to mold tunnel lining concrete,
An auxiliary assembly member for assisting erection of the legs of the support device is composed of an elongated structural member other than the legs of the support device, and the auxiliary assembly member is connected to the lower end of the leg. Then, the assembly auxiliary member is installed on the ground so as to extend in a direction intersecting the extension direction of the tunnel.

(B) The dismantling method of the centr according to the technical concept (A), wherein the auxiliary assembly member is separated from the support device and the legs are erected using the separated auxiliary assembly member.

11... Center, 12... Support device, 13... Support frame, 26... Scaffolding frame, 41... Jack member, 55... Adapter.

Claims (5)

A method for assembling a center for molding tunnel lining concrete by means of a supporting device and an arch-shaped concrete formwork supported by the supporting device, comprising:
An assembly assisting member for assisting erecting of the first leg of the supporting device is constituted by a long structural member other than the first leg of the supporting device, and the assembly assisting member is the first leg. The auxiliary assembly member is installed on the ground so as to extend in a direction intersecting the extension direction of the tunnel, and the first leg is extended with a jack to extend the first leg of the support device. The wheels attached to the two legs are installed on the rail, the first leg is contracted by a jack, the supporting device is supported by the wheels, the auxiliary assembly member is floated, and the auxiliary assembly member is placed on the first leg. How to assemble the center that separates from the legs . 2. The method for assembling a center according to claim 1, wherein a scaffolding frame installed in said center is used as said auxiliary assembly member. 3. The method for assembling a center according to claim 1, wherein the pair of auxiliary assembly members are attached so as to be parallel to the lower ends of the first legs. 4. The method for assembling a center according to claim 3, wherein jack members are provided at both ends of said auxiliary assembly member for keeping said auxiliary assembly member horizontal. 5. The method for assembling the center according to any one of claims 1 to 4, wherein the support device is assembled using a separate assembly auxiliary member.

Images