JPH04112991U - Rectangular section shield tunneling machine - Google Patents

Abstract

(57) [Summary] [Purpose] It is possible to excavate with a stable face, and it is also possible to easily control the attitude and direction of the shield excavator. [Structure] A plurality of swinging arms 8A, 8B, which protrude forward from inside the shield main body 1 and are swingably supported in a horizontal plane, are installed in the front part of the shield main body 1 having a rectangular cross section, and are spaced vertically in two sets at a predetermined interval. Two rows of rotatable cutter drums 10A, 10B are provided between the tips of the swing arms 8A, 8B, and the swing drive device 11 in the shield body 1 drives the swing arms 8A, 8B.
The cutter drums 10A, 10B are oscillated by the rotary drive device, and a tunnel with a rectangular cross section is excavated by rotating the cutter drums 10A, 10B by a rotary drive device.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a shield excavator that excavates a tunnel with a rectangular cross section.

0002

[Conventional technology]

Traditionally, shield construction methods typically involve excavating tunnels with a circular cross section. However, in the form of use, such as the installation of an underground railway, unnecessary parts may be removed from the necessary parts. There are many important (wasted) parts, and this is especially noticeable when forming two lines. ing. Therefore, in recent years, shield tunneling machines with a cocoon-shaped cross section have been put into practical use. death However, the cross section will still be circular, and circular shapes such as waterways can be applied as is. Since there is a lot of wasted parts other than those that are used, recently tunnels with a rectangular cross section are being excavated. A shield tunneling machine has been proposed in, for example, Japanese Unexamined Patent Publication No. 2-66295. This shield tunneling machine has a large diameter cup at the front of the shield body that can rotate freely around the horizontal axis. Two cutter drums are arranged on both sides, and a small diameter cutter drum is placed between these large diameter cutter drums. Two cutter drums were arranged, one above the other, rotatable around a horizontal axis.

0003

[Problem that the idea aims to solve]

However, in the above-mentioned shield excavator, the large diameter cutter drum is almost on one side of the shield body. , with more than half of the diameter protruding forward from the front of the shield Therefore, the cutter drum is swallowed up and down in the vertical and horizontal directions to loosen the face. There is a high risk of collapse of the face. In addition, such a large diameter In structures that use a cutter drum, it controls the attitude and direction of the shield excavator. The problem is that it is extremely difficult to

0004 The present invention solves the above problems, enables excavation with a stable face, and To provide a rectangular cross-section shield tunneling machine that makes it easy to control the attitude and direction of a shield tunneling machine. The purpose is to

[0005]

[Means to solve the problem]

In order to solve the above problems, this invention has a shield on the front part of the shield body with a rectangular cross section. It protrudes forward from within the shield body and is swingably supported in a plane parallel to one side of the shield body. A plurality of sets of swinging arms are arranged at predetermined intervals in the swinging direction, and the swinging arms are A rotatable cutter drum is installed between the ends of the arms, and a cutter drum is installed inside the shield body. There is a swing drive device that swings each row of cutter drums via a swing arm, and a cutter drum in each row. A rotary drive device is provided to rotate the rotor drum.

[0006]

[Effect]

According to the above configuration, the cutter drums are arranged in multiple rows in the swinging direction, and the swinging drive device Because the tunnel is excavated while swinging these cutter drums, the cutter drum The diameter of the ram can be reduced, and therefore the amount of protrusion from the shield body can be reduced. At the same time, the swinging range of the swinging arm can be reduced, making it possible to stabilize the face and dig into the ground. It can be removed. In addition, the negative impact on the excavated soil due to the swinging of the swinging arm is small. The driving force for the swinging arm can be small.

[0007]

【Example】

An embodiment of the rectangular cross-section shield excavator according to the present invention will be described below based on FIGS. 1 to 5. I will explain.

[0008] As shown in Figures 1 to 3, the skin plate 2 of the shield body 1 has a rectangular cross section. A pressure bulkhead 3 is provided at the front of the shield body 1, and a pressure bulkhead 3 is provided at the front of the shield body 1. It is divided into a pressure chamber 4 for maintaining the earth pressure at the face and an atmospheric pressure chamber 5 at the rear. There is. A support recess 6 is formed in the center of the pressure partition wall 3, and the support recess 6 is formed above and below the support recess 6. A pair of left and right swing support shafts 7, 7 are rotatable at a predetermined interval between the side walls 6a. It is supported through vertically. There is a flat surface near the side wall 6a of these swing support shafts 7. Swinging arms 8A and 8B each having a fan shape in plan view are fixed, and the swinging arms 8 Between the tips of A and 8B, two vertical rotation shafts 9A and 9B are located on the left and right sides, respectively. The rotation between the swinging arms 8A and 8B is The center cutter drum 10A is attached to the shafts 9A and 9B, and A side cutter drum 10B is attached to the end of the rotating shafts 9A, 9B on the outside of the arms 8A, 8B. 10B is attached. These cutter drums 10A and 10B have a As shown in the figure, known cutter bits 10a are attached at predetermined intervals. Ru.

[0009] A cutter driver is attached to the vertical swing shaft 7 via swing arms 8A and 8B at one end. A swing drive device 11 for swinging the bars 10A and 10B is provided, and a cutter is provided at the other end. A rotary drive device 12 that rotationally drives the drums 10A and 10B is provided.

0010 That is, the swing drive device 11 protrudes from the side wall 6a of the support recess 6 toward the atmospheric pressure chamber 5. A drive lever 13 is fixed to one end of the drive lever 13, and an atmospheric pressure chamber is provided at the tip of the drive lever 13. The piston rod of the rocking cylinder device 14 is pivotally supported on the skin plate 2 in 3. are connected. Therefore, the oscillating cylinder device 14 is actuated to rotate the piston. By extending and retracting the rod, the swing arms 8A and 8B are moved in that direction via the drive lever 13. Each can be swung horizontally.

[0011] Further, as shown in FIGS. 4 and 5, the rotational drive device 12 is connected to the side wall 6a of the support recess 6. A drive shaft 15 is located at the axial center position of the hollow portion on the other end side of the swing support shaft 7 that protrudes toward the atmospheric pressure chamber 5 side. is rotatably provided, and this drive shaft 15 is connected to a cup provided in the atmospheric pressure chamber 5. The first drive gear 17 attached to the output shaft of the rotary motor 16 is connected to the drive shaft 1. It is engaged with an interlocking gear 18 attached to the outer end of the shaft 5 and is driven to rotate. and , the second drive gear 19 attached to the inner end side of the drive shaft 15 is inside the swing arm 8B. The vertical rotation shafts 9A and 9B are connected to each other through two or three intermediate gears 20 arranged in the They are interlocked and connected to passive gears 21A and 21B, respectively. Therefore, the cutter The rotary motor 16 drives the drive shaft 1 through the first drive gear 17 and the interlocking gear 18. 5 is rotated to drive the passive gear 2 through the second drive gear 19 and the plurality of intermediate gears 20. By rotating 1A and 21B and rotating the vertical rotation axes 9A and 9B, respectively. , a center cutter drum 10A and a side cutter drum 10B. 10B The rotation can be driven.

0012 The pressure bulkhead 3 also includes a mud pipe 22 for injecting pressurized water into the pressure chamber 4, and a mud pipe 22 for injecting pressure water into the pressure chamber 4. A mud drain pipe 23 is connected to discharge the excavated earth and sand together with muddy water. In addition, the sludge pipe In place of 22 and 23, install soil removal equipment such as a screw feeder that can adjust the amount of soil removed. You can also do it.

[0013] Furthermore, although not shown, a segment 24 is provided in the atmospheric pressure chamber 5 of the shield body 1. An erector device is provided along the skin plate 2 to assemble it into a rectangular cross section. Then, the shield body 1 is moved forward using the assembled segments 24 as reaction force receivers. A plurality of propulsion jacks 25 are provided.

[0014] In the above configuration, the center cutter drum 10A and the rotary drive device 12 and side cutter drum 10B. 10B respectively, and also rotates them. The dynamic drive device 11 drives the center cutter drum 10A and the side cutter drum. Mu10B. 10B are swung horizontally to perform excavation, and the propulsion jack 23 is advanced to advance the shield body 1. At this time, the cutter drums 10 at both ends A and 10B are excavated to the outside from skin plate 2 by the amount of extra excavation δ, and this surplus is removed. By changing the excavation amount δ, the earth pressure exerted on the cutter drums 10A and 10B is It is possible to control the attitude of the shield body 2 by changing the angle, and also control the direction of excavation. Wear.

[0015] According to the above embodiment, the center cutter drum 10A and the center cutter drum 10A are arranged vertically. and side cutter drum 10B. Arrange 4 sets of 10B horizontally at specified intervals. The swing arms 8A and 8B are used to swing two rows at a time in the horizontal direction to form tons of rectangular cross-sections. Since the grooves are excavated, the diameter of the cutter drums 10A and 10B can be reduced, and the seam The amount of protrusion from the front end of the lead body 1 can be reduced, and the negative impact on the face can be reduced. Effective for stabilizing the face. Also, the swing strokes of swing arms 8A and 8B are narrowed. Since the cutter drum 1 can be The driving force of the swing drive device 11 of 0A and 10B can also be small.

[0016] 6 and 7 show other arrangement examples of the cutter drum, and FIG. 6 shows the shield body 31. Three sets of cutter drums 30 are installed at the front via swing arms 38A, 38B, and 38C. A, 30B, and 30C are arranged horizontally at a predetermined interval, and the cutter driver in the center is Figure 7 shows the shield body 41 with the shield body 41 slightly protruding forward. Three sets of cutter drums 40A, 40 via swing arms 48A, 48B, 48C B and 40C are arranged at a predetermined interval in the horizontal direction along the arcuate surface.

[0017] Note that in the above embodiment, the cutter drum, which rotates around the vertical axis, is placed on a horizontal surface. However, the cutter drum, which rotates around the horizontal axis, is rotated in the vertical plane. It may be oscillated. In addition, by integrating multiple sets of the above shield tunneling machines, It is also possible to excavate tunnels with extremely large diameters and rectangular cross sections.

[0018]

[Effect of the idea]

As described above, according to the present invention, the cutter is oscillated by the oscillating drive device. Because the drums are arranged in multiple rows in the swinging direction, the diameter of the cutter drum can be made smaller. Therefore, the amount of protrusion from the shield body can be reduced, and the swing arm can be Since the range of oscillation can be reduced, the rock face can be stabilized and the ground can be excavated. In addition, the negative impact on the excavated earth and sand caused by the swinging of the swinging arm can be reduced, and The driving force of the arm can also be small. Furthermore, by controlling the amount of rocking, the amount of over-drilling can be reduced. can be set arbitrarily, changing the earth pressure applied to the cutter drum to create a seal. It is possible to control the attitude of the main body and also control the direction of excavation.

[Brief explanation of drawings]

FIG. 1 is a schematic plan sectional view of a rectangular-section shield tunneling machine according to the present invention.

FIG. 2 is a schematic side sectional view of the shield tunneling machine.

FIG. 3 is a front view of the shield tunneling machine.

FIG. 4 is a plan sectional view of the main part of the shield tunneling machine.

FIG. 5 is a side sectional view of a main part of the shield tunneling machine.

FIG. 6 is a schematic cross-sectional plan view showing another embodiment.

FIG. 7 is a schematic cross-sectional plan view showing still another embodiment.

[Explanation of symbols]

1 Shield body 2 Skin plate 3 Pressure bulkhead 7 Swing support shaft 8A,8B Swing arm 9A,9B Rotation axis 10A center cutter drum 10B Side cutter drum 11 Oscillating drive device 12 Rotary drive device 14 Oscillating drive cylinder device 16 cutter rotation motor 30A,30B,30C cutter drum 40A,40B,40C cutter drum

Claims (1)

[Scope of utility model registration request] Claim 1: A plurality of swing arms protruding forward from the shield main body and swingably supported in a plane parallel to one surface of the shield main body are mounted on the front part of the shield main body having a rectangular cross section at predetermined intervals in the swing direction. A plurality of sets are arranged with spaces between each other, and a rotatable cutter drum is provided between the distal ends of the swinging arms, respectively;
A rectangular cross-section shield excavator characterized in that a swing drive device for swinging each row of cutter drums via a swing arm and a rotation drive device for rotating the cutter drums are provided in a shield main body.