JPS60223598A - Tunnel drilling machine - 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 [Industrial Application Field] The present invention relates to a tunnel boring machine that is capable of sufficiently kneading excavated sand and a viscous material.

[Prior Art] A conventional tunnel excavator is shown in Fig. 1, in which a is a cutter, b is an earth removal device that can rotate integrally with the cutter a, and C is an earth removal device with a set of screws. A pipe, d is a casing, e is a viscous material injection pipe, and f is an injection port for injecting the viscous material into the back surface of the cutter a, which is provided at the vermouth slit.

In the above-mentioned conventional device, the viscous material is injected from the viscous material injection pipe e through the injection port ``, and the cutter a is rotated to excavate the face i111j, and the excavated soil 1'j11 is kneaded with the viscous material. The soil is then discharged to the rear vertical shaft using an earth removal device.However, since such a device supplies the viscous material to the back of cutter a, it is not possible to sufficiently mix the excavated soil and the viscous material. As a result, problems such as increased load on the cutter, blockage of the soil removal route (inside the casing), and increased load on the soil removal device occur.This phenomenon is particularly noticeable when excavating sandy soil, gravelly soil, etc. be.

[Object of the Invention] In view of the above-mentioned circumstances, the present invention has been made for the purpose of providing a tunnel excavating machine capable of sufficiently kneading excavated earth and sand and a viscous material.

[Structure of the Invention] In the present invention, a viscous material passage for injecting a viscous material to the front surface of the cutter is provided in the shaft portion that rotatably supports the cutter. Therefore, it becomes possible to sufficiently stir and knead the excavated earth and sand and the viscous material.

[Implementation Example 1] Embodiments of the present invention will be described below with reference to the accompanying drawings.

2 to 4 show an embodiment of the present invention, in which a support 3 is attached to the inner periphery of the outer cylinder 2 of the excavator body 1 disposed at the tip of the tunnel.
The support body 3 is extended toward the distal end side of the tunnel, the bearing support body 4 is fixed to the distal end of the support body 3, and the spherical bearing 5 is fitted around the outer periphery of the bearing support body 4. A direction correction outer cylinder 6 is fitted to the outer peripheral spherical part so as to be able to correct its position around the rotation center X, and a telescopic cover seal 7 is connected between the direction correction outer cylinder 6 and the outer cylinder 2.

The bearing 8 is fitted into the boss portion of the bearing support 4 and the bearing 8 is
A cutter shaft 9 is rotatably supported, the tip of the cutter shaft 9 is made to protrude toward the face 10 side, and a cutter 12 with a cutter pitch 11 is fixed to the tip of the cutter shaft 9 while stirring. The blade 13 is firmly shielded, and the bearing support 4 is provided with a viscous material passage 14 whose one end is open on the back side of the bearing support 4. The other end of the viscous material passage 14 is connected to the cutter shaft 9 of the bearing support 4. The viscous material passage 1G is made to communicate with the circumferential groove 15 provided in the fitting portion, and a viscous material passage 1G is bored in the cutter shaft 9, and one end of the viscous material passage 16 is made to communicate with the groove 15. The other end of the cutter 12 is connected to an inlet 17 that is open toward the outer periphery of the cutter 11119 on the front surface of the cutter 12, and a check valve is provided on the outer periphery of the tip of the cutter shaft 9 to prevent the inlet 17 from being blocked by earth and sand. Install 18,
A viscous material injection pipe 20 for feeding a viscous material such as bentonite solution from the ground to the rear side opening of the viscous material passage 14.
Connect.

A screw 21 is fixed to the rear part of the cutter shaft 9, and the screw 21 is housed in the casing 22.
A bell mouth 23 is fixed between the casing 2 and the bearing support 4 to form a cutter chamber 24, and a rotatable casing 25 is disposed at the end of the casing 22 opposite to the bell mouth 23, and the inner periphery of the casing 25 is The screw 21 is hardened, and the gear 26 fixed to the outer periphery of the casing 25 is
The drive shaft 2 is driven by a propulsion drive device 27 installed in the shaft 19.
A propulsion drive device 27 is connected to the rear of the casing 25 with a pinion 29 that can be rotationally driven via a
Screw J-30゜31 that can be rotated by
casings 32 and 33 containing the casings 32 and 33 are provided.

In the figure, 34 is a direction correction jack, 35 is a direction correction link, 36 is a seal, and 37 is a viscous material injection device.

Direction correction jack 34, direction ViiIE link 35
are arranged one set each on the top, bottom, left and right, so that the direction of the direction correction outer cylinder 6 can be corrected.

The viscous material discharged from the viscous material injection device 37 passes through the viscous material passage 14, the circumferential groove 15, and the viscous material passage 16 from the viscous material injection pipe 20, and is injected into the front surface of the cutter 12 from the injection port 11. Further, the screw 21 is rotationally driven by the propulsion drive device 27 via the drive shaft 28, pinion 29, gear 26, and casing 25, and the cutter shaft 9 is rotationally driven by the rotation of the screw 21, and the cutter 12 and stirring blade 13 are rotated. is rotated. Further 11j, forward drive device 2
7 rotates the screws 30, 31.

As the cutter 12 rotates, the excavated earth and sand is mixed with the viscous material injected from the injection port 17 by the rotational movement of the cutter 12 and the stirring action of the stirring blades 13. Remove soil from screw 2.
1 to the casing 32, and the screw 30.
31 in the casing 32, 33 to the shaft 19. By appropriately adjusting the rotational speed of the screw 21, the casing 32 is filled with earth and sand to form a water stop plug, so it is possible to perform safe work even on spring ground.

It should be noted that the present invention is not limited to the above-described embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

[Advantageous effect 1] According to the tunnel excavation machine of the present invention, since the viscous material can be injected into the front surface of the cutter, the degree of stirring and kneading of the excavated earth and sand and the viscous material can be significantly increased, and the amount of the mixed earth and sand can be improved. By increasing fluidity and water-stopping performance, it is possible to reduce the load on the cutter, prevent sand from clogging inside the screw casing, and reduce the load on the screw. It becomes possible to excavate the water ground, and furthermore, the formation of a water stop plug prevents the face from collapsing, so the directional accuracy (straightness) and I direction correction effect are improved, and various other excellent effects can be achieved for the pipe.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a conventional tunnel excavating machine, Fig. 2 is an explanatory diagram of the tunnel excavating machine of the present invention), and Fig. 3 is a detailed view of the main body of the tunnel excavating machine of Fig. 2. 4 is a view taken in the direction of arrows IV-IV in FIG. 3. In the figure, 1 is the main body of the excavator, 2 is the outer cylinder, 4 is the bearing support, 5 is the spherical bearing, 6 is the outer cylinder for direction correction, 9 is the cutter shaft, 10
12 is a cutter, 13 is a stirring blade, 14 is a viscous material passage, 15 is a groove, 16 is a viscous material passage, 17 is an injection port, 2
0 is a viscous material injection pipe, 21 is a screw, 22 is a casing, 27 is a propulsion drive device, 30.31 is a screw, 3
2.33 is the casing, 34 is the direction correction jack, 3
5 indicates a link for direction correction 1゜Patent applicant Nippon Telegraph and Telephone Public Corporation Patent applicant Ishikawajima-Harima Heavy Industries Co., Ltd. Continued from page 1 ■ Inventor Takahiro Oishi @ Inventor Iwaike Part @ Inventor Kakutani Tsunehiro @ Inventor Takahashi Takabe 1-1-6 Uchisaiwai-cho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation 2-5-4 Tsukuda, Chuo-ku, Tokyo Ishikawajima Harima Heavy Industries, Ltd. Tsukuda Office 2-chome, Chuo-ku, Tokyo 5-4 Ishikawajima Harima Heavy Industries Co., Ltd. Tsukuda Office 2-5-4 Tsukuda, Chuo-ku, Tokyo Tsukuda Office Ishikawajima Harima Heavy Industries Co., Ltd.

Claims (1)

[Claims] 1) In a tunnel excavation machine equipped with a rotatable cutter and an IF soil device driven in conjunction with the cutter, the shaft of the cutter is provided with a viscous material passage for injecting the viscous material into the front surface of the cutter. Installation Features: 1c] Tunnel excavator.