JPS59177499A - Shielded excavator for method of construction of push pipe type shielding - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (a > Industrial application field One of the tunnel excavation methods is the push-pipe shield method, in which a leading shield excavation device is followed by an in-progress pipe suspension, and the While moving the propulsion tube forward with a jack, the tunnel is excavated using a shield excavation device, and the propulsion tube is buried as a tunnel lining. .

The present invention also relates to a shield excavation device used in the above construction method.

(b) Prior Art The diameter of the propulsion pipe used in the above-mentioned push-pipe shield construction method is equal to the diameter of the tunnel to be excavated, and the outer diameter of the shield excavation device must also match the shape of the propulsion pipe.

For this reason, conventional shield excavation equipment directly attaches the cutter head and drive unit to the propulsion pipe body and the outer shell depending on the shape of the tunnel to be excavated. It was constructed so that the JA and the like were attached integrally, and the direction adjustment jig was inserted between the rear end of the shield excavation device and the propulsion tube to press against the outer shell.

Therefore, when the diameter of the tunnel to be excavated differs, it is necessary to design and manufacture a shield excavation device that is suitable for each case. It can only be used for tunnel construction with the exact same shape, and if the shape is even slightly different, it cannot be used for other purposes. Also, the device I used once was the direction correction jack palm-9.
A small portion of these can be removed and reused as parts, but most of them are immediately killed within the tunnel.

As mentioned above, conventional shield excavation equipment cannot be used for unusually shaped tunnel construction at all, resulting in extremely low operating rates.Moreover, the design and manufacturing costs of the shield excavation equipment account for a high proportion of the construction cost. There were drawbacks such as.

(C) Object of the Invention The present invention improves the drawbacks of the conventional type described above, and -
The outer diameter of the excavation equipment can be changed arbitrarily by replacing a part of it ()℃ - it can be used for one-tatsumi diameter tunnels, and the common main parts of the 21-nit construction can be reused. We provide shield excavation equipment for the push pipe type shield construction method that can be used.

(d) Structure of the Invention The seal 1 to the excavation device of the present invention has a common back part such as a driving device such as a motor and a jig V for direction correction in an inner cylinder having a diameter smaller than the diameter of the excavator 1 to the tunnel. Installed in one piece
The present invention comprises a base body having a shape of 1 to 3, and an outer cylinder, a cutter disk, a pressure ring, etc. are removably installed on the base body.

(e) Example An example of the present invention is shown in FIG. 1, which is an exploded perspective view with 1/4 cut away, FIG. The engagement state between the inner cylinder and the outer cylinder will be explained based on a partially cut away front view.

The base body Δ has a cylindrical steel inner cylinder 1 (ill), and between the front of the inner cylinder 1 there are seven radially inward flange 2 on one side, and on the rear. Flanges 3 facing outward in the radial direction are formed on each of the 11 surfaces, and groove-shaped ribs 4 are provided protruding in the axial direction at every 45 degree angle on the outer circumferential surface.

A motor 5 and a reducer 6 are installed in the inner cylinder 1, and the reducer 6 is interlocked with the rotation of the motor.The rotary shaft of the reducer projects forward from the center of the inner cylinder, and a joint part 7 is formed at the tip. has been done.

Also, inside the inner cylinder 1, there are direction correction jacks 8 for each angle 901.
The rods 8a are respectively attached in such a manner that they extend toward the rear side of the inner cylinder.

Further, inside the inner cylinder 1, a water supply vibrator 9 and a mud feeding/discharging pipe 1Q are installed. It opens from the bottom to the front.

As described above, the base body A is integrated into a unit, and each of the following parts having a diameter that matches the diameter of the tunnel to be excavated is attached to the base body A in a removable manner. .

Although not shown, the inner cylinder 1 is constructed by welding or bolting each inner cylinder piece divided into circular arcs. Next, 1.3F'r 11 is the outer cylinder of Y11, which is approximately the same diameter as the tunnel to be excavated.

A front ring 12 is provided at the front inner R1 of the outer cylinder 11, and a rear ring 13 is provided at the rear inner circumference (c), and the inner circumferential surface of the intermediate portion extends in the axial direction and has both ends. Guide ribs 1/I joined to the front and rear rings 12.13 respectively
are arranged in parallel every 45 degrees. Also, each guide rib 171
A mode of connecting the phase n- to the phase n--C cross-section cross-section reinforcing rib 15
are provided on the inner peripheral surface of the intermediate portion of the outer cylinder 11 at predetermined angles.

The outer cylinder 11 is fitted from the front of the base body Δ with the guide rib 14 being guided by the grooved rib 4, and the rear ring 13 abuts the outward flange 3 and the front ring 12 abuts the inward flange 2. Instead, it is attached to the base A at a removable f stage such as a pole. Next, reference numeral 16 is a cutter disk having a cutting blade (not shown) formed on the front surface, and the cutter disk has a groove L1 for taking in the excavated earth and sand.
17 is bored, and the joint portion 7 IJ, :Q
A flange portion 18 for connecting S is provided.

The cutter disk 1G is fitted in the outer cylinder 11, and the flange portion 18 is connected to a removable means such as a bolt at a joint portion 7 protruding from the front of the B4 hole.

Next, reference numeral 19 has a cylindrical shape with a diameter C that fits inside the outer cylinder 1'1, and reinforcing ribs 20 are provided at predetermined intervals iji on the inner circumference.
This is a pressure ring with a In front of the pressure ring 19 is a cylindrical jack receiver 21 with a diameter that can fit into the inner cylinder 1, and in the rear of the pressure ring 19 is a jack receiver 21 that receives the pressure of the propulsion tube 22 that follows. ] A tube body receiver 23 is formed respectively.

Furthermore, on the outer peripheral surface of the pressure ring 19 which is in contact with the inner periphery of the outer cylinder 11, a seal packing 2 is provided so that both can be slidably contacted in a sealed state.
4 is provided, and a seal packing 25 is also provided on the back side of the tube body receiver 23 that comes into contact with the propulsion tube body 22.

The above-mentioned pressure ring 19 is attached to a small-diameter front seat holder 21.
is fitted into the inner cylinder 1, and the outer circumferential surface of a large-diameter pressure ring is fitted into the outer cylinder 11, respectively, and the flange portion of the pressure ring is brought into contact with the back surface of the outward flange 3 of the inner cylinder 1.

Next, reference numeral 2G denotes a spacer that is fitted into the inner cylinder 1 and is interposed between the jack receiver 21 and the rear seat ε3a of the direction correction seat 4ε3. A seal packing 27 is attached to the outer circumferential surface of the slider 26, and a seal packing 2ε3 is attached to the back side that comes into contact with the jack receiver (21).

As shown in the above structure, the tunnel is integrally cornited and Iζ is excavated.
Then, the spacer 26 and the additional L1 ring 19 are each removably stepped to form a shield excavation device.

-1 Seal I ~ 1-th tunnel excavation by excavation equipment ([
Since the case of carrying out is the same as that of the conventional type and tJ, a detailed explanation will be omitted and a simple explanation will be given.

When the rear end of the following digging tube body 22 is pressed by a propeller (not shown), the pressure link 19 receives this pressing horn at the tube receiver 23 and pushes the inner tube 115 and the outer tube 11 forward. 1, and at the same time the rotary drive horn of the motor 5 is
is transmitted to the cutter disk 16 to excavate the ground in front.

At this time, water is supplied from the water supply vibrator 9 to the cutting edge part during excavation, and the excavated soil that has turned into mud is taken into the interior from the mud supply and drainage pipe 10 via the suction pump (shown in the figure). Water is drained sequentially.If the excavation direction is tilted, the direction is corrected by operating the direction correction jacks 8 provided at every angle 901.

In addition, it is possible to uniformly adjust the forward and backward positions of the inner cylinder 1 and outer cylinder 11 by expanding and contracting the direction correction jack 8 and by attaching and detaching the slider 26.

)Effect of explanation As is clear from the above examples, when using the shield excavation device of this 5N light, the cutter disk and pressure ring installed in the outer cylinder can be changed by appropriately replacing them with ones that match the diameter of the tunnel being excavated. It is possible to accommodate diameters of l~.

Therefore, at least the commonly used base body is not required to be designed or manufactured each time, and the base part can be removed after tunnel excavation and used for oil conversion, so the construction time is reduced. It is possible to shorten the time and reduce costs. It should be noted that the present invention is not limited to the above-mentioned embodiments, but can be modified in various ways within the scope of the invention.

For example, in the example, we explained what is involved in muddy water excavation.
It can be applied to various pressing-type seal construction methods, such as those using earth pressure balance and those that remove soil with a screw auger.

[Brief explanation of drawings]

The drawings all show embodiments of the present invention, and FIG. 1 is a 1/4 scale
Figure 2 is an exploded perspective view cut away, Figure 2 is a vertical cross-sectional side view of the assembled state, and Figure 3 is a partially cutaway front view showing the engaged state of the inner cylinder and outer cylinder. Yes. [Explanation of symbols... Inner cylinder 2... Inward flange 3...
・・Outward 7 langes 4・Groove rib 5・Motor 6・Reducer 7・Joint part
8... Direction - 1 River jack 9... Water supply pipe 10... Feed 1) 1 Pipe 11... Outer cylinder
12... Front ring 13... Rear ring 14... Guide rib 15.20... Reinforcement rib
16... Cutter disk 17... Frontage
1B...Flange part 19...7JII r-r ring 21...Shitotsuki receiver 22...Propulsion attachment
23... Tube receiver 24.25.27.28...
・Seal patch 1 nin 26...Spacer Δ・
...Base Figure 2 Figure 3 Figure 1

Claims (1)

[Scope of Claims] A drive device for rotating the cutter disk and a jig for direction correction are installed in an inner cylinder having a diameter smaller than the diameter of the tunnel to be excavated, and the drive device a is mounted on the front side of the inner cylinder. A joint part interlocked with the rotating shaft of the rotary shaft is constructed of a base body which is made of a cylindrical shape, and a diameter approximately equal to the diameter of a 1-channel drilled into the outer circumferential side of the inner cylinder with respect to the base body. The outer cylinder is removably attached,
Inside the front side of the outer station, a collar tarp C block is removably connected to the n0 joint part, and inside the rear side of the outer cylinder, there is a collar that can be pressed against the rear end surface of the inner cylinder and can be pressed. A pressure ring is provided that slides into contact with the inner circumferential surface of the outer cylinder, one side of the pressure ring forms a jig V support that can come into contact with the direction correction seat, and the other side is connected to the shield excavation device. 1. A shield excavation device for a push-pipe type shield construction method, characterized in that the shield excavation device is capable of coming into contact with a propulsion tube body and is fit into the rear side of the inner tube and the outer tube.