JPH0629278Y2 - Formwork equipment for tunnel machine - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a formwork device in a tunnel machine.

[Conventional technology]

Conventionally, tunnel construction in the shield construction method has been carried out by assembling ready-made segments carried in behind the shield machine while excavating the shield machine.

According to this method, it takes a great deal of time to carry in and assemble a heavy segment, and at the same time,
There was a problem that caused the cost to rise.

Therefore, a center member extending rearward from the shield machine is provided with a slider that slides in the front-rear direction by using the center member as a guide, and a mold form having a gable form part for concrete placing on the front side through a radial jack on the slider. Further, there is a machine for a shield tunnel in which a lining concrete mold keeping form is provided on the rear side and both the form and the mold keeping are moved by sliding a slider.

[Problems to be solved by the device]

Since the mold and the holding mold are slid together with the slider, it is possible to solve the problem that it takes time to move, assemble and disassemble the segments.

However, there was a problem that curve construction could not be performed.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, the present invention has a center member having a propulsive force holding device attached to a distal end through a jack, and a propulsion holding ring provided at the tip of the center member,
A shield machine provided in front of the propulsion holding ring via a large number of shield jacks, a slider slidably provided with the center member as a guide, and a split-type maintenance type provided on the slider via radial jacks. A mold and a split-type mold in which the entire trailing edge is abutted against the entire circumference of the front edge of the mold-holding mold, the slider is provided with radial jacks on the slider, and the wife mold is attached to the propulsion holding ring via jacks. In a tunnel excavator consisting of a frame part, a propulsion holding ring is attached to the tip of the center member via a universal joint,
Further, at least one end of the propulsive force holding device, the holding mold and the mounting jack of the mold is rotatably connected.

[Action]

When excavating by bending a tunnel, the holding ring is tilted with respect to the center member so that the holding ring intersects the axis of the bending direction at a right angle, and the propulsion force holding device, the mold and the mold keeping mold are Along the mating surface, use the rotatable joint at the end of the jack as a fulcrum.

〔Example〕

As shown, a thrust holding device 2 is provided at the end of the center member 1.

The propulsive force holding device 2 is configured to press the ring 4 supported at the tip of the jack 3 against the existing lining concrete A by the extension action of the jack 3 radially protruding from the end portion of the center member 1. .

A propulsion holding ring 5 is provided at the tip of the center member 1, and a shield machine 7 is provided in front of the propulsion holding ring 5 via a large number of shield jacks 6. The shield machine 7 is dug into.

The propulsion holding ring 5 is attached to the center member 1 through a universal joint 8 and, when performing the bending digging, at the portion of the universal joint 8 so that the surface of the holding ring 5 intersects at right angles to the bending digging direction. Tilt the retaining ring 5.

Further, the center member 1 is provided with a slider 9 which slides between the jack 3 and the propulsion holding ring 5 using the center member 1 as a guide.

In the illustrated case, the slider 8 is composed of a cylindrical body fitted to the outside of the center member 1, and a rack 10 provided in the outer peripheral axial direction of the center member 1 and a pinion 11 supported by the slider 9 are meshed with each other. , Motor, etc.
Thus, the pinion 11 is driven to slide the slider 9, but the slider 9 may be slid by another method.

Further, in front of the ring 4, there is provided a mold holding frame 14 supported by jacks 13 arranged radially on the slider 9.

In the illustrated case, the two mold-holding frames 14 are arranged in front and back with the front and rear edges facing each other, but the number is not limited.

Further, on the front side of the mold-retaining form 14, a form 16 having a gable form 15 is provided via a jack 17 arranged radially on the slider 9.

The entire circumference of the rear edge of the above-mentioned form 16 is a form-holding form 1 during straight line excavation.
4, butted against the entire circumference of the front edge of No. 4, the gable form part 15 and the form frame 16
Then, concrete a is poured into the space surrounded by the existing lining concrete A, and when this concrete a hardens, it becomes the existing lining concrete A.

The gable form part 15 is attached via a jack 18 protruding rearward from the propulsion holding ring 5, and the gable form part 15 presses the concrete a by the extension action of the jack 21.

Further, the shape-holding molds 14 and 16 are divided into the required number as shown in FIGS. 2, 3 and 5, and a flat cylindrical body 19 whose both side edges are open is provided between the divided opposing edges. , This flat cylinder 1
9 is provided with a seal plate 20 fitted inwardly from both sides and a spring 21 incorporated in the flat tubular body 19 so as to be interposed between the seal plates 20, and a sealing structure 22 is provided to extend the jacks 13 and 17. The diameter is expanded by the action, and jack 1
The diameter is reduced by the contracting action of Nos. 3 and 17.

Furthermore, at least one end of the jacks 3, 13, 17 is
It is rotatably connected.

In the illustrated case, the jacks 3, 13, and 17 are rotatably attached to only one end through the pin 23, but both ends may be rotatably attached.

Next, a tunnel construction method using the excavator having the above configuration will be described.

First, the ring 4 and the mold holding frame 14 are pressed against the existing lining concrete A by the extension action of the jacks 3 and 13 to support the center member 1 at a fixed position.

Then, the shield machine 7 is moved forward by the extension action of the shield jack 6 to dig.

At this time, even if the advancing direction of the shield machine is bent, the propulsion holding ring 5 and the shield machine 7 are bent at the portion of the universal joint 8 with respect to the center member 1.

After that, first, the jack 13 is contracted to release the pressing of the mold-holding form 14 against the existing lining concrete A, and then the slider 9 is placed so that the form 16 is positioned at the front concrete placing portion of the lining concrete A in the front row. To move the mold-holding mold 14 and the mold 16, and then the jacks 13 and 17 are extended to expand the mold 16 to have a predetermined diameter, and the existing lining concrete A The shape-holding frame 14 is pressed against.

At this time, the inclination and extension degree of each jack 17 are adjusted so that the gap between the excavation surface and each part of the outer periphery of the form 16 becomes uniform as the bending excavation proceeds.

In addition, for the non-uniform gaps generated around the entire rear edge of the mold 16 and the entire front edge of the mold retainer 14, a filling mold 31 that matches the gap as shown in FIG. 7 is selected. And fix it to the opposing ends, the mold 16 and the mold-holding mold 14 by a fastener 32 composed of a bolt and a nut, or a tube 33 in the gap as shown in FIG. At the same time as fitting, air is pressed into the tube 33 to close it.

In order to prevent the fitted tube 33 from falling off, for example, as shown in the drawing, the comb-teeth-shaped protrusion 3 is displaced at the protruding position so as to avoid collision with the opposing edges of the mold 16 and the mold holding frame 14.
4 may be engaged.

Then, concrete is poured into the space surrounded by the mold 16, the end mold 15 and the existing lining concrete A.

When the cast concrete a is hardened, it becomes an existing lining concrete.

〔effect〕

As described above, according to the formwork device of the present invention, it is possible to bend and excavate, and at least one end of the slider is slidable as the center member guide slides when placing concrete on the bent portion. It is also possible to use a formwork attached via a jack, and it is also possible to press a precast formwork of the same construction on a bent ready-made concrete so as to closely contact the front face.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of an excavator according to the present invention, FIG. 2 is a front view of a mold keeping mold, FIG. 3 is a front view of the mold, and FIG. 4 is an enlarged vertical sectional side view showing the main part of the same. 5 and 5 are enlarged vertical front views of the same, FIG. 6 is an enlarged vertical side view of a tube fitted in a gap, and FIG. 7 is a vertical side view of a closed mold fitted in a gap. 1 ... Center member, 2 ... Propulsion force holding device, 3 ... Jack, 4 ... Ring, 5 ... Propulsion holding ring, 6 ... Shield jack, 8 ... Universal joint, 9 ... Slider, 10 ... … Rack, 11 …… Pinion, 12 …… Drive machine, 13 …… Jack, 14 …… Maintenance formwork, 15 …… Wife formwork section, 16 …… Formwork, 17,18 …… Jack, 22… … Sealing device, 23… Pin.

Claims (1)

[Scope of utility model registration request] 1. A center member having a propulsive force holding device attached to the end through a jack, a propulsion holding ring provided at the tip of the center member, and a proximate front of the propulsion holding ring provided with a number of shield jacks. Shield machine, a slider slidably provided by using the center member as a guide, a split-type mold holder provided with a radial jack on the slider, and the entire circumference of the front edge of the mold holder. At the tip of the center member in a tunnel machine, which is made up of a split formwork in which the entire circumference of the trailing edge is abutted and a radial jack is provided on the slider, and a gable formwork that is attached to the propulsion holding ring via the jack A propulsion retaining ring was attached via a universal joint, and at least one end of the propulsion force retaining device, the mold holding mold and the mounting jack of the mold was rotatably connected. In mold apparatus tunnel boring machine according to symptoms.