JPS58120997A - Tunnel excavator - 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 The present invention relates to a tunnel excavator in which a front body, a middle body, and a rear body are joined together in a flexible manner.

As a tunnel boring machine for soft soil layers, there is a tunnel poling machine 2 as shown in FIG.

The former is segment 3 constructed sequentially on the excavated pile wall.
The excavator excavates by pressing the tunnel with the shield jack 4, and even if spring water occurs in the tunnel, the segment 3 creates a watertight structure, so the excavator 1 will not be submerged in water.This is because it excavates a soft soil layer. The rotational reaction force of the cutter disk 5 is also small, and there is an advantage that it can be opposed only by the frictional force generated when the shield jack 4 presses the segment end 3a.

However, if this is applied to hard rock, it does not have a strong support means that can resist the rotational reaction force of the cutter disk 5, and there is no extra support between the wall and the excavator 1, which is required when making a curve. As a result, the shield type tunnel excavator 1 cannot be used for hard rock excavation because it is not possible to secure a sufficient gap with the cutter disc 5, and it is not possible to sufficiently over-excavate hard rock with the over cutter 6. There is.

On the other hand, since the latter has a gripper 8 and support legs 9, it can sufficiently support the reaction force of the cutter disk 5, and since it does not have the seal skin plate 7 used in the shield tunnel excavation machine 1, the gripper 8 and support leg 9, the excavation direction can be easily changed and the excavation direction can be changed, but if spring water occurs, the excavation will be submerged,
This spring water has the drawback that the excavated soil and stones on the conveyor belt 10 for carrying out slide down and are not properly placed on the conveyor belt 10. In addition,
If this is applied to a soft soil layer, there is a risk that the gripper 8 etc. will be buried in the pit wall, or that the pit wall or face will not be able to stand on its own and collapse.

The present invention has been made to solve the above-mentioned problems, and is capable of excavating in any soil layer, and can be used as a double-type tunnel boring machine in hard rock layers, and as a tunnel poling machine in hard rock layers. Tunne/L that can be
/ The purpose is to provide excavators.

Its characteristics are that the front, middle, and rear bodies are joined together in a flexible manner, and the front body is equipped with a cutter disc on its front surface, a front gripper is attached to the circumference of its body, and the middle body is equipped with a cutter disc and a front gripper on the circumference of the body. An inner cylinder that is slidable in the axial direction is inserted into the outer cylinder, and a shield jack removal key gripper is installed on the circumference of the rear cylinder, and a thrust jack is installed between the front and rear cylinders. The tunnel excavation machine was used as an intervening tunnel excavator.

Hereinafter, the present invention will be explained in detail based on examples thereof.

FIG. 3 is an overall vertical cross-sectional view of the tunnel excavator 11 of the present invention, in which the front body 12, middle body 13, and rear body 14 are flexibly joined in the axial direction via sea/L/15.16. There is.

On the front surface of the front body 12, as shown in FIG. 4, there is a cutter disk 20 having a roller bit 17 for hard rock, a cutter pit 18 for soft soil layer, and a slit 19 for swallowing excavated soil.
is installed. The cutter disk 20 is supported in the front body 12 by a bearing 22 via a cylindrical support 21, and is driven by power from a drive motor 23 being transmitted via a pinion 24 and a ring gear 25. Note that a seal 26 is interposed between the support body 21 and the front body 12.

A partition wall 28 is provided inside the support body 21 via a seal 27.
A hopper 3o is provided in the cutter chamber 29 between the partition wall 28 and the cutter disk 20, and a fluid conveyor 31 with an opening 31a is installed below the hopper 3o passing through the partition wall 28. ing. In addition, fluid conveyor 3
Not limited to 1, a belt conveyor may be used depending on the situation.

An appropriate number of front grippers 32 as shown in FIG. 5 are attached to the circumference of the front shell 12, and the front grippers 32 are fixed to the mine wall by expanding and contracting them in the radial direction using hydraulic pressure. It is now possible to do so. ζ.

The front body 1 is placed in the recess 33 immediately behind the front gripper 32.
The pit wall seal 34 is housed so as to wrap around 2 to 9 rolls.

When fluid is supplied into the shaft wall seal 34, it bulges out toward the shaft wall to stop water flowing from the face 35.

The middle body 13 consists of an outer cylinder 38 having the same outer diameter as the front body 12 and an inner cylinder 39 that slides in the axial direction within this outer cylinder 38, and the middle body 13 as a whole has a telescopic structure. . The inner cylinder 39 has a key 4o, which is fitted into a keyway 41 of the outer cylinder 38 to prevent mutual rotation, and a seal 42 that maintains watertightness between the two is also provided with a metal lug 4o that makes it slidable.
3 is interposed in the gap 44.

An appropriate number of direction control jacks 45 are installed between the front surface of the inner cylinder 39 and the rear end of the front cylinder 12, so that the front cylinder 12 can swing relative to the inner cylinder 39. .

The rear trunk 14 is equipped with a plurality of glue key grippers 48 that expand and contract in the radial direction and a shield jack 5o that presses the segments 49 on its circumference. A pit wall seal 51 having the same function as A/34 is interposed. Incidentally, even when excavating a hard rock layer, if the segment 49 is constructed, the shaft wall seal 34, 51 may be omitted.

Between the front end of the rear body 14 and the end of the outer cylinder 38 of the middle body 13, there is a dechaining jack 52 that enables bending, and between the rear end of the front body 12, a thrust jack 53 is provided.
As shown in the figure, appropriate numbers of each are installed. The axis 53a of the thrust jack 53 may be parallel to the axis 12a of the IJ cylinder 12, but if it is installed so as to be inclined from the rear cylinder 14 toward the front cylinder 12 so as to approach the axis 12a, It is advantageous to be able to generate the radial component force necessary for turning, either separately or in combination with the aforementioned direction control jack 45.

Since the present invention is constructed as described above, it operates as follows.

First, to excavate the fractured zone and soft soil layer, the cutter disk 2o is rotated by the drive motor 23, and the main and bit 17 are also rotating, but since the soil layer is soft, the excavation function is hardly exerted. be. Slit 19 for excavated soil and stone
As the cutter disk 2o rotates, it is introduced into the hopper 3o and passed through the intake port 31a to the fluid conveyor 3.
It will be carried out in 1.

The excavator 11 is propelled by extending the shield jack 50 attached to the rear body 14, and the end face 49a of the segment 49 constructed in the tail play 14a of the rear body 14.
This is done by applying HUE using the spreader 50a.

The forward movement of the front body 1 is performed by varying the amount of extension of the direction control jack 45 provided between the inner cylinder 39 of the front body 12 and the middle body 13.
2 is swung relative to the middle body 13, the thrust jacks 53 are extended at necessary locations, and a reaction force is applied to the segments 49 via the shield jacks 5o. At this time, since the thrust jack 53 is arranged at an angle as described above, a force in the radial direction is also generated and it is possible to easily apply a turning force. In addition, the front body 12, the middle body 13, and the rear body 14 have seals 15 and 16 between each.
The excavator 11 as a whole can move in a curved manner by the deformation of the sea/1/15.

Next, when excavating a hard rock layer, first the rear gripper 48 of the rear body 14 is pressed against the mine wall. Since the shaft wall is hard, there is no need to construct the segment 49, and the rear barrel 14 is held in that position and can take up the digging reaction force of the roller bit 17.

At this time, the shaft wall seam (v51) of the rear shell 14 bulges 2 in the radial direction, blocking the spring water from the face 35. When the thrust jack 53 is extended, the front barrel 12 moves forward together with the inner cylinder 39 of the middle barrel 13 via the direction control jack 45. Therefore, the inner cylinder 39 is different from the key 4 in relation to the outer cylinder 38.
Slide on Meta/l/43 while being stopped at 0. When one stroke of digging is completed, the front gripper 32 of the front barrel 12 is pressed against the shaft wall to bulge the shaft wall seam 34, and then the rear gripper 48 of the rear barrel 14 and the shaft wall seam 34 are pressed against the shaft wall. Reduce /1151.

At this time, the spring water is stopped at the mine wall sea/l/34.

Therefore, when the thrust jack 53 is reduced, the outer cylinder 3 of the middle cylinder 13 connected to the rear cylinder 14 by the de-change jack 52
It can be advanced together with 8.

Promotion is achieved by repeating this process.

The conveyance of excavated soil and stones is the same as in the case of the soft soil layer described above, and there is no difference in the forward movement except that the reaction force is provided by the rear gripper 48 and the front gripper 32 in the same way as propulsion. This prevents spring water from the face 35 from entering the excavator 11.

As described in detail above, the present invention is equipped with a cutter disc on the front surface of the front barrel, a front gripper for the barrel, and a cutter disk that is slidable in the axial direction within the outer barrel of the middle barrel. The inner cylinder is inserted into the rear body, a shield jack removal key gripper is attached to the circumference of the rear body, and a slot jack is interposed between the front body and the rear body, so one excavator can be used. Therefore, it is possible to excavate both soft soil layers and hard rock layers without becoming inoperable due to spring water in the face and collapse of the ground, and it is also possible to excavate in a curved manner even in hard rock layers. It becomes possible.

[Brief explanation of the drawing]

Fig. 1 is a conventional example of a shield type tunnel boring machine, Fig. 2 is a conventional example of a tunnel poling machine, Fig. 3 is a vertical sectional view of the tunnel excavating machine of the present invention, and Fig. 4 is a U-II of Fig. 3. FIG. 5 is a one-sided view of the cross section taken along line m-m in FIG. 3, FIG. 6 is a one-sided view of the section taken along line ■-■ in FIG. - It is a one-sided view of the V line cross section. 11... Tunnel excavator, 12... Front body, 12a.
... Axis line, 13... Middle body, 14... Rear body, 20...
- Cutter disk, 28... Partition wall, 31... Fluid type conveyor, 32... Front gripper, 38... Outer cylinder, 39... Inner cylinder, 48... Rear gripper, 50
...Shield jack, 53...Thrust jack, 53a...Axis patent applicant Kawasaki Heavy Industries, Ltd. agent Patent attorney Katsutoshi Yoshimura (and one other person) Figure 6
Figure 7

Claims (3)

[Claims] (1) A tunnel excavator has a front body, a middle body, and a rear body that are joined together in a flexible manner. An inner cylinder that is slidable in the axial direction is fitted inside the outer cylinder, and a shield jack and a gripper are installed on the circumference of the rear cylinder, and a thrust jack is installed between the front and rear cylinders. A tunnel excavating machine characterized by being interposed. (2) The front body has a watertight bulkhead at the rear opening of the cutter disc, and a fluid conveyor is installed to penetrate the bulkhead and carry out the excavated soil. A tunnel excavator as described in Scope 1. (3) The thrust jack is installed so that its axis approaches the axis of the front shell from the rear shell toward the front shell. Tunne/L/excavator.