JPH01275898A - Mold apparatus for tunnel covering construction - Google Patents

Abstract

PURPOSE:To improve a covering construction speed, by separating a tunnel covering construction surface pressure-welding mold and a side mold from each other, and by composing the whole molds to de worked separately. CONSTITUTION:A tunnel covering construction pressure-welding mold 8, and a side mold 9 which is set on a side surface opposite to previously set covering construction concrete on the mold 8 are separated from each other. Between the molds 8, 9, a side mold moving device consisting of a parallel arm 12 for connecting a side mold bottom section and a side mold bearing member to each other, and a jack 13 for pushing or pulling the side mold, is placed. By the side mold moving device, both the molds 8, 9 are separately worked, and the whole molds are composed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a tunnel lining formwork device used for lining a rock excavation surface with concrete in tunnel construction.

(Prior Art) Conventionally, for example, the Utility Application No. 1983-12 proposed by the present inventors, etc.
As disclosed in No. 3759 and Utility Model Application No. 62-123760, a formwork device for compressing concrete to the rock excavation surface and a side formwork located on the side opposite to the existing lining concrete of the same formwork are integrated. With the new crimping formwork device,
There is a method of lining the tunnel.

(Problem to be Solved by the Invention) However, when tunnel lining is conventionally performed using this type of formwork device, the concrete poured inside the formwork waits for solidification, and then the concrete is removed while removing the side formwork. Since it is poured, it takes time to construct the lining.

Furthermore, by integrating the crimp formwork and the side formwork, it is not possible to lengthen the expandable and retractable side formwork plates due to their engagement with the sides of the formwork body.

Furthermore, in places where there is shoring on the lining surface, the side formwork must be removed from the formwork body, which requires a great deal of time and effort.

The present invention has been proposed in view of the problems of the prior art, and its purpose is to significantly improve the lining speed compared to the prior art, and to improve the lining speed even when there is shoring on the lining surface. Another object of the present invention is to provide a tunnel lining formwork device that allows the side formwork to be installed outside the shoring without removing the side formwork.

(Means for Solving the Problems) In order to achieve the above object, the tunnel lining formwork device according to the present invention includes a formwork for crimping the tunnel lining surface and an existing lining concrete on the same formwork. The side formwork is separated from the side formwork arranged on the opposite side surface, and the side formwork is placed between the same side formwork and the same side formwork support member in a direction away from the side surface of the tunnel lining surface crimping form. It is constructed by interposing a side formwork lateral movement device to move the formwork.

Further, in the present invention, the side form moving device is constituted by a parallel arm connecting the side form bottom and the side form support member, and a jack for pushing and pulling the side form.

Furthermore, in order to improve workability and increase lining speed, the present invention provides a formwork for crimping the tunnel lining surface by dividing the formwork into a plurality of sections in the longitudinal direction. It has a built-in

Furthermore, in the present invention, end forms are disposed at both ends in the longitudinal direction so that the formwork for pressing the tunnel lining surface can be moved in both opposite directions along the tunnel lining surface for construction.

(Function) In this way, the tunnel lining formwork device according to the present invention is separated into a formwork for tunnel lining surface compression and a side formwork, and both are operated separately to form the entire formwork while moving. Therefore, by configuring the crimping part of the tunnel lining surface crimping form to be a fraction of the length of the side form,
Concreting the crimping formwork, and placing the lining concrete by moving the crimping form several times in succession by the length of the side formwork without stepping over the strength of the concrete while following the crimping steps. do.

In addition, if there is a shoring on the lining surface, the side formwork is moved laterally by the side formwork lateral movement device, and the side formwork is installed outside the shoring, and the side formwork is installed between the shoring and the rock excavation surface. It is possible to close the gaps that occur between the two.

(Example) The present invention will be described below with reference to the illustrated embodiments.

(1) is a heavy machine, (2) is a pedestal, and (3) is a rotating device disposed on the pedestal.

Said rotating bag! (3) On top are the swing actuator (5) of the formwork support beam (4) for crimping the tunnel lining surface, and the existing lining concrete (a) on the formwork for crimping the tunnel lining surface.
) and an actuator (7) for pivoting the support beam (6) of the side formwork located on the opposite side.

Each of the support beams (4) and (6) is configured to be extendable and retractable by a known mechanism, and a formwork (8) and a side formwork (9) for crimping the tunnel lining surface are supported at the tips.

The side formwork (9) has a side formwork piece (11) that can be expanded and contracted by a hydraulic jack (lO) built into the formwork body, so that the side formwork (9) body and side mold A parallel arm (12) for lateral movement is connected to the frame support beam (6) via a pin, and a parallel arm (12) for lateral movement is connected between the side formwork body and the support beam (6).
The side formwork (9) is configured to be moved laterally by retracting the side formwork push/pull jack (13) that connects the side formwork (9) with the side formwork (9).

Figures 11 and 12 show the formwork (8) for crimping the tunnel lining surface.
), an endless belt (15) that slides while being in pressure contact with the lining concrete surface is stretched around rollers (14) disposed at both ends in the longitudinal direction of the main body.

The main body has, for example, a crimping part divided into three parts along its longitudinal direction, and each crimping part is divided into 1 part of the length of the side formwork (9).
A group of hydraulic jacks (16) for pressing the lining concrete surface, each built into the main body, and a pressure bonding plate (17) connected to the group of jacks are disposed.

A gable formwork (18) is pivotally supported at both longitudinal ends of the main body so as to be freely openable and closable, and a gable form opening/closing jack (18) is interposed between the gable formwork and the main body.
19).

In the figure, (20) is a main body angle adjustment jack interposed between the main body and the support beam (4).

Then, the crimp form (8) is installed facing the surface of the lining earth. At this time, the installation interval of the formwork (8) with respect to the ground is determined by the support beam (4), and the angle is determined by the angle correction jack (20).

On the other hand, the side formwork (9) is supported by the crimp formwork (8) by the support beam (6) and side formwork push/pull jacks (13).
) is placed on the side opposite to the existing lining concrete (a), and the side formwork pieces (11) are extended by operating a hydraulic jack (lO) and brought into contact with the ground surface.

Then, concrete is poured into the space formed between the crimp formwork (8), the side formwork (9) facing the same formwork in the tunnel axis direction, and the existing lining concrete (a). After closing one end formwork (ll) and solidifying the concrete, actuate the actuator (7) to move the side formwork (9) by that length, then actuate the actuator (5). Move the crimp formwork (8) a length to 1 and place the concrete in the formwork (8) (as shown in A1).
9) and crimped onto the excavated surface via the endless belt (15) using the hydraulic jack (16) and the crimping plate (17). (Refer to Figure 3) When the concrete is completely poured, the crimp form (8) is moved by a length of 1 to open the end form (18), and the concrete is poured as shown in A2. Drive in and crimp.

Repeat the above operation three times to cast lining concrete for the length L of the side formwork (9), wait for the final concrete to solidify as shown in A3, and complete the concrete lining for the length L. do.

The above operations are repeated to line the tunnel excavation surface (b).

In this way, according to the above-mentioned embodiment, the formwork can be moved while the concrete is not solidified, compared to the conventional case where the concrete is poured once and the formwork is moved after waiting for it to solidify. Lining speed increases.

Now, the conventional method is to set concrete hardening time to 3 minutes and concrete pouring time to 1 minute, and to pour concrete once and move the formwork each time, and to pour concrete three times as in the previous example. Comparing the casting speed when pouring a long length of lining concrete by moving it once, the conventional method requires 3 minutes (one place) + 3 minutes (one place) + 3 minutes (
1 location) = 9 minutes.

In the method according to the example, 1 minute (1 location) + 1 minute (1 location)
+3 minutes (one location) = 5 minutes, and the lining speed is significantly improved in the case of the embodiment.

In the example shown in Fig. 3, the crimp formwork (8) is moved clockwise along the tunnel excavation surface, but after the lining has been completed up to the top of the tunnel cross section, the crimp formwork (8) is moved clockwise along the tunnel excavation surface. When lining is carried out counterclockwise to the top of the tunnel cross section, gable forms (towards) are placed at both lengthwise ends of the crimp form (8).
, so construction can be continued by using the gable formwork (18) on the opposite side from the previous one without reversing the crimp formwork (8).

Further, in the construction example shown in FIG. 3, the right end crimping device of the crimping form (8) is operated, but when the crimping form (8) moves counterclockwise, the left end crimping device is operated. The crimping device is operated.

An intermediate crimping device may also be used depending on the amount of concrete poured.

Figure 1 shows the case where lining concrete is constructed using the above-mentioned formwork device when there is no shoring on the lining surface.
As shown in the figure, when there is shoring (C) on the lining surface, the side formwork (9) is moved horizontally via the parallel arm (12) by retracting the side formwork push/pull jack (13). The concrete lining work is carried out without any hindrance by moving it in the direction and positioning it outside the shoring (C).

(Effects of the Invention) According to the present invention, as described above, the formwork for crimping the tunnel lining surface and the side formwork disposed on the same formwork on the side opposite to the existing covering concrete are separated. Since both can be operated separately, the same crimp formwork can be continuously operated while following the steps of concrete placement and crimping of the crimp form frame without waiting for the poured concrete to develop its strength. Therefore, the lining speed is significantly improved compared to the conventional method.

In addition, because a side formwork lateral movement device is interposed between the side formwork and the same side formwork support member, when there is a shoring on the lining surface, the side formwork is installed outside the shoring. This allows concrete lining work to be performed without removing the formwork on the same side as in the conventional method.

The invention according to claim 2 is such that the side formwork lateral moving device is constituted by a parallel arm connecting the side formwork bottom and the side formwork support member, and a side formwork pushing/pulling jack, and has a simple structure. This ensures that the side formwork can be moved laterally.

The invention as claimed in claim 3 provides a structure in which the formwork for crimping the tunnel lining surface is divided into a plurality of lengths of the same length, and a pouring concrete crimping device is built into each section, and the formwork for crimping is crimped in both directions along its length. By moving it several times in succession and compressing the poured lining concrete, it is possible to improve the lining speed.

The invention according to claim 4 is characterized in that end forms are disposed at both longitudinal ends of the form for crimping the lining surface, and the form for lining is moved in both directions along its length without reversing. This is the place where the concrete was poured.

[Brief explanation of the drawing]

1 and 2 are vertical cross-sectional views showing tunnel lining construction conditions using an embodiment of the tunnel lining formwork device according to the present invention. Figure 2 shows the case where there is shoring on the lining surface, Figure 3 is a front view showing the lining concrete pouring process, and Figures 4 and 5 have stars marked with 6.
The figures are a front view and a side view showing an installation example of the formwork, and a plan view, respectively; Figures 9 and 10 are a front view and a side view, respectively, showing the state of the side formwork when the formwork piece is extended, and Figures 11 and 12 are a front view and a side view, respectively, of the formwork for lining surface tunnel crimping. FIG. (6)... Side formwork support beam, (8)... Formwork for crimping the tunnel lining surface, (9) - Side formwork, (12)... - Parallel arm, (13)
~・-Jack for pushing and pulling the side formwork, (16)--Jack for one crimping, (17)--Crimp plate, (18)--Gable formwork. Agent: Patent attorney Shige Okamoto (2 persons) Figure 1 Figure 4 Figure 5 Circle Figure 6

Claims (4)

[Claims] (1) Separate the formwork for crimping the tunnel lining surface and the side formwork installed on the side opposite to the existing lining concrete on the same formwork, and separate the formwork on the same side and the formwork support member on the same side. A formwork device for tunnel lining, characterized in that a side formwork lateral movement device is interposed between the side formwork and the side formwork in a direction away from the side surface of the formwork for crimping the tunnel lining surface. (2) The tunnel cover according to claim 1, wherein the side formwork lateral movement device comprises a parallel arm connecting the same side formwork bottom and a side formwork support member, and a side formwork push/pull jack. Industrial formwork equipment. (3) The formwork device for tunnel lining according to claim 1, wherein the formwork for crimping the tunnel lining surface is divided into a plurality of sections along the longitudinal direction, and a placed concrete crimping device is built into each section. (4) The formwork apparatus for tunnel lining according to claim 1, wherein the formwork for pressing the tunnel lining surface is provided with end forms at both longitudinal ends thereof.