JPH08259172A - Segment transfer rail device - Google Patents

Abstract

PURPOSE: To provide a segment transfer rail device capable of bending a rail for a crane to guide movement of the crane suspending a segment from the neighbourhood of a trailer attached to an excavating machine to an erector so that the crane can move without making contact with another equipment at a bent part of a tunnel at the time of excavating the tunnel under a shield tunneling method. CONSTITUTION: A rail for a crane is constituted by connecting three rails 11a, 11b, 11c of proper length the sections of which are the same in shape and size. A front end part of the front rail 11c is installed on a fixed part in the neighbourhood of an erector, and a rear end of the rear rail 11a is installed on a following carriage driven by an excavating machine. A rear end part of the front rail 11c and a front end part of the rear rail 11a are supported on equipment driven by the excavating machine such as a support frame of a belt conveyor 5. The intermediate rail 11b is connected to the rear end part of the front rail 11c and the front end part of the rear rail 11a free to adjust bending in the cross direction.

Description

Detailed Description of the Invention

[0001]

[Industrial field of application] When excavating a tunnel by the shield method, the inner peripheral wall of the tunnel in the undigged state immediately after the rotor of the excavator excavates is an arc-shaped reinforced concrete segment, steel segment, or ductile segment (this In the specification, these are collectively referred to as segments) and are lined in a cylindrical shape. However, the present invention provides a segment transfer for moving a crane that suspends the segments to the center of an erector that supports the segments. Regarding the rail device.

[0002]

2. Description of the Related Art To excavate a tunnel, a shield method is often used in which a rotor having a cutting blade on its front surface is rotated to excavate into the ground into a cylindrical shape.

When excavating a tunnel by the shield method, every time the excavation progresses to some extent, the inner wall of the tunnel in a bare state is covered by arranging arc-shaped segments in a cylindrical shape so that a gap is formed between the inner wall of the tunnel and the segment. The filler is injected to fix the segments and to firmly form the inner wall of the tunnel to complete the tunnel.

FIG. 18 is a longitudinal sectional view schematically showing an example of a state in which a tunnel is excavated by the shield method. The rotor 1 having a cutting blade attached to the front surface (left side surface in FIG. 18) is rotated by a drive machine (not shown) via a drive shaft 2,
The soil is excavated into a cylindrical shape to form a tunnel 3 in a bare state, and the tunnel 3 advances to the left. The soil excavated by the rotor 1 is
Transferred to the belt conveyor 5 by the screw conveyor 4,
It is carried out of the tunnel. The inner surface of the excavated tunnel 3 in the undigged state is formed by connecting several arc-shaped segments 6 in the circumferential direction to form a short cylindrical shape, and the short cylinders are successively connected in the longitudinal direction as the excavation progresses, A filler is injected into the gap between the segment and the tunnel wall of the bare earth to complete the tunnel.

A plurality of segments 6 are placed on a segment truck 8 traveling on a rail 7 for a segment truck laid from the entrance side of the tunnel and are carried under a crane 9, and a hanging metal fitting 10 is temporarily placed in the center. After being screwed together, they are hung by the crane 9 and the crane rail 1
The crane 9 is moved along 1 to be transferred to the position of the erector 12. The size of the segment 6 is 90 cm in width and 2 in thickness, for example, when the diameter of the tunnel is 6 m.
The inner surface of the tunnel, which is 2.5 cm in length, 3.5 m in length in the circumferential direction, and weighs 2 tons and has five segments arranged in the circumferential direction, is closed by an auxiliary segment with a short circumferential length.

The erector 12 encloses the screw conveyor 4, the crane rail 11 and other equipment located near the center of the tunnel, and is a C-shape that can be rotated around the tunnel axis without touching them. The segments 6 carried to the lower part of the section are gripped one by one and rotated, and the segments are lifted along the inner surface of the tunnel and attached at a predetermined position.

The segment truck 8 carries the segment 6 back and forth with respect to the tunnel entrance side. As the excavation by the rotor 1 progresses and the inner wall of the tunnel is completed, the segment truck rail 7 is extended to the depth of the tunnel. Will be put in. The crane rail 11 is also extended.

[0008]

In the tunnel behind the rotor 1, there are provided a drive device for the rotor 1, a screw conveyor 4, an erector 12, a belt conveyor 5 and the like. The rail 11 for crane avoids these, and the crane 9
Since it is necessary to drive the vehicle to transport the segment directly below the erector, it is necessary to lay it while changing the direction vertically and horizontally.

When the tunnel is straightly excavated by advancing the rotor 1 straight, the bent shape of the crane rail 11 remains the same and the rail is moved forward as the excavation progresses, but the tunnel changes direction. When excavating while
The rail 11 must be bent and laid. For example,
Since there are many irregular bends in a common groove for collecting and passing sewerage, gas pipes, electric wires, etc., the bent shape of the rail 11 cannot be made constant.

In the case of such a curved tunnel, the crane rail 11 itself must be bent to the left or right in accordance with the bending of the tunnel, or two or more straight rails must be connected at an angle. However, in the former case, when the bending angle of the tunnel changes variously as the excavation progresses, it is impossible to form the rails into curves one by one according to the bending of the tunnel. Moreover, the usage period of the rail is short. Furthermore, if the rail is supported only at both ends, it is difficult to support the large twisting action exerted on the rail when the crane reaches the middle of the bend. In the latter case, when the radius of curvature of the tunnel is reduced to about 30 m, the refraction angle of the rail becomes 7 ° to 8 ° or more, which makes it difficult for the crane to pass through.

[0011]

According to the present invention, a rail for a crane is constructed by connecting three rails having the same shape and the same cross section and an appropriate length. The front end of the front rail is a screw conveyor. It was supported by a fixed object near the erector such as the outer cylinder or belt conveyor support frame, and the rear end of the rear rail was installed in parallel with the segment truck rail 7 by loading the switchboard, controller, etc. attached to the excavator. The trailing truck is supported on a trailing truck that travels with the excavator, and the rear end of the front rail and the front end of the rear rail are moved by the excavator, such as a support frame under the belt conveyor. And a front end of the front rail and a front end of the rear rail are connected to the front end and the rear end of the intermediate rail so as to be adjustable in lateral angle to form a segment transfer rail device.

[0012]

The crane rail is composed of a front rail, an intermediate rail, and a rear rail that are adjustable in refraction angle. Therefore, the crane rail can be bent at an angle corresponding to the bending degree of the tunnel, and can contact the tunnel wall. Without doing so, the crane can be moved while suspending the segments while avoiding various devices provided at the center of the tunnel.

If the intermediate rail is provided at a portion of the front rail or the rear rail that is not bent in the vertical direction, it is not necessary to consider the vertical refraction.

[0014]

1 to 4 show an outline of an embodiment of a segment transfer rail device according to the present invention, FIG. 1 is a vertical sectional side view of a tunnel, and FIG. 2 is a cross-sectional plan view of a tunnel in the case of a straight tunnel. 3 is a cross-sectional plan view of a curved tunnel, FIG.
FIG. 4 is a sectional view taken along line WW of FIG. 3. The same parts as those of the conventional example shown in FIG. 18 are designated by the same reference numerals, and the description thereof will be omitted.

The crane rail 11 is an I-shaped steel having an appropriate length, in which three cross-sectional shapes of a rear rail 11a on the tunnel entrance side, an intermediate rail 11b, and a front rail 11c on the far side of the tunnel are the same. It is composed by connecting.

An end portion (rear end portion) of the rear rail 11a on the tunnel entrance side is provided with a controller for driving the excavator, a switchboard, an electric box, etc. At the connecting portion A, the trailing carriage 14 is pulled by the excavator and moves on the rails 13, 13. As shown in FIG. 4, the succeeding carriage 14 is formed with a cavity that covers the segment carriage rail 7 and allows the segment carriage 8 to pass therethrough, and the segment carriage 8 can travel freely past the succeeding carriage 14. The front end of the rear rail is
It is supported by the support frame of the belt conveyor 5. The support frame may be supported by a device that is moved forward as the excavator moves.

As shown in FIG. 5 (side view) and FIG. 6 (plan view), the connecting portion A includes a bracket 15 fixed to the front surface of the trailing carriage 14 and a bracket 16 fixed to the rear end of the rear rail 11a. And the brackets are joined by bolts 17 so that the mounting angle and a little lateral position can be adjusted. 18 and 19 are reinforcing materials.

The front end of the front rail 11c has a connecting portion B.
(FIGS. 1 to 3), it is connected to the outer cylinder of the screw conveyor 4. As shown in FIG. 7 (side view) and FIG. 8 (view from arrow a in FIG. 7), the connecting portion B is a receiving member at the lower end of the hanging members 20 and 21 welded to the left and right side surfaces of the outer cylinder of the screw conveyor 4. Two
2 is welded, the bracket 24 is engaged with the I-shaped steel 23 hung on the receiving member 22, and the spherical bush 26 is attached to the bracket 24 and the bracket 25 welded to the front rail 11c.
Is inserted and connected. The rear end of the front rail is
Like the front end of the rear rail, it is supported by the support frame of the belt conveyor 5.

9 (side view), FIG. 10 (bottom view), and FIG. 11 (view from the arrow b in FIG. 9) are connected to both ends of the intermediate rail 11b. The connecting fitting 27 is shown in FIG.
As shown in (perspective view), a boss portion 29 having a shaft hole 28 formed therein.
Flanges 30 and 30 that sandwich the vertical side of the intermediate rail 11b.
And the flanges 30 and 30 are formed on the intermediate rail 1.
It is welded and joined to the end of 1b.

At the ends of the rear rail 11a and the front rail 11c, to which the connecting fittings 27 at both ends of the intermediate rail 11b are connected, a connecting fitting 31 shown in FIG. 13 (perspective view) is welded, and upper and lower boss portions 32 are formed. , 32, the boss portion 29 of the connecting fitting 27 of the intermediate rail 11b is inserted, and a bolt (not shown) is inserted to join the fittings 27, 31 in a hinge shape.
At the both ends of the upper and lower flanges of the intermediate rail 11b, as shown in FIG.
As shown in, a notch of 0 to 6 ° is formed.

On the lower surface of the three rails 11a, 11b, 11c, a round rack 33 having teeth of the same pitch formed on the side surface of a round bar, which meshes with a gear of a driving machine (described later) for moving the crane. Weld 33. 9 to 11,
50 is a reinforcing material.

As shown in FIGS. 1 and 14 (enlarged view of the crane section in FIG. 1) and FIG. 15 (view from the arrow c in FIG. 14), the crane 9 has flanges under the rails 11a to 11c by wheels 34. The wire rope 37 is hung from the machine body 35 that travels by riding on the vehicle, and the motor 36 drives the wire rope 37 to wind it up and down to move the hook 38 up and down. Aircraft 35 is
It is connected to a first drive wheel 40 via a universal joint 39 that can turn up and down, left and right, and the first drive wheel 40 is loosely assembled so that it can be turned up and down by a pivot 41 and can be turned slightly in the left and right directions. It is connected to the second drive wheel 43 by the joint 42.

As shown in FIG. 16 (a view from the arrow d in FIG. 14), the first drive vehicle 40 is provided with a reversible brake gear motor 45 attached to a body 44 which can run along the rails 11a and the like by wheels 34, The gear 47 is driven via the reduction gear 46. Since the gear 47 meshes with the round rack 33, this causes the machine body 44 to travel along the rear rails 11a and the like, and the machine body 35 of the crane to move on the rails 11a, 11b, 11b.
Can be run along c. The second drive vehicle has the same structure. 51 is a balance weight.

When excavating by bending the tunnel as shown in FIG. 3, the intermediate rails 11b are the rear and front rails 1.
It is bent and connected to 1a and 11c at an angle. Since the notch of 0 to 6 ° is formed at the end of the flange of the intermediate rail 11b, this bending connection is easy. Further, as shown in FIG. 1, the intermediate rail 11b is connected to the portions of the rear and front rails 11a and 11c which are not bent when viewed from the side, so that it is not necessary to consider bending in the vertical direction.

A gear motor 45 with a brake is used to drive the first and second drive wheels 40, 43 and the gear 47 of the crane body 35.
When is rotated, the gear 47 meshes with the round rack 33 to drive the drive wheels 40, 43 and the crane body 35 along the rails. Intermediate rail 11b is rear and front rail 1
In the portion that is refracted and coupled with 1a and 11c, depending on the refraction angle of the rail, there is a risk that smooth engagement with the gear 47 may not be achieved at the joint between the two round racks 33 and 33. In this embodiment, since the teeth at the end of the round rack 33 are notched, even if the crane drive of one drive vehicle is no longer performed at this portion, the gear 47 of the other drive vehicle is used.
And the round rack 33 are engaged with each other to perform a crane driving action. Even after the other drive wheel comes to the toothless portion after the gear of one of the drive wheels is engaged with the round rack again, the crane is driven. The movement can be continued.

As described above, the crane rail 11a
~ 11c is bent and connected according to the bending of the tunnel,
Erector 1 without touching the segment hung from the segment truck 8 to the tunnel wall or other devices in the tunnel.
It can be transported to the center of 2.

If the clearance angle between the rails is up to about 6 °, it does not hinder the passage of the crane body and the wheels 34 of the driving vehicle. To remove or reduce this gap, a member having a protrusion 48 for closing the V-shaped gap as shown in FIG. 17 may be attached to the lower surface of the rail with a bolt passing through a flange 49.

[0028]

【The invention's effect】

(1) By bending and connecting the three rails, the crane can be moved without touching the bent tunnel wall or other equipment in the tunnel.

(2) Front rail 11c and rear rail 11a
Since both ends are firmly supported by the conveyor support frame, the excavator trailer, etc., the intermediate rails supported by these front rails and rear rails at both ends are immovable. The crane can be moved smoothly.

(3) Three crane rails 11a to 11
c can be bent at an angle corresponding to the bending of the tunnel and can be firmly connected, and the excavation angle can be easily adjusted as the excavation proceeds.

(4) If the intermediate rail 11b is provided at a portion of the front or rear rail that is not bent in the vertical direction,
The intermediate rails can be joined without bending in the vertical direction.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a tunnel showing an embodiment of the present invention.

FIG. 2 is a cross-sectional plan view of the tunnel in the case of a straight tunnel.

FIG. 3 is a cross-sectional plan view of a curved tunnel.

FIG. 4 is a sectional view taken along line WW of FIG.

FIG. 5 is a side view of a connecting portion A between the rear rail and the trailing vehicle.

FIG. 6 is a plan view of the above.

FIG. 7 is a side view of a connecting portion B between a front rail and a screw conveyor outer cylinder.

FIG. 8 is a view on arrow a in FIG.

FIG. 9 is a side view of an end portion of the intermediate rail.

FIG. 10 is a bottom view of the above.

FIG. 11 is a view on arrow b in FIG. 9.

FIG. 12 is a perspective view of a connecting fitting attached to the end of the intermediate rail.

FIG. 13 is a perspective view of connecting fittings attached to rear and front rail ends.

FIG. 14 is an enlarged view of the crane section in FIG. 1.

15 is a view on arrow c in FIG.

16 is a view on arrow d in FIG.

FIG. 17 is a perspective view of a member that closes the V-shaped gap.

FIG. 18 is a vertical cross-sectional view schematically showing a conventional example of excavating a tunnel by a shield method.

[Explanation of symbols]

 1 Rotor 2 Drive Shaft 3 Tunnel 4 Screw Conveyor 5 Belt Conveyor 6 Segment 7 Segment Carriage Rail 8 Segment Carriage 9 Crane 10 Hanging Bracket 11 Crane Rail 11a Rear Rail 11b Middle Rail 11c Front Rail 12 Electa 13 Subsequent Truck Rail 14 Subsequent Carts 15 and 16 Brackets 17 Bolts 18 and 19 Reinforcing materials 20 and 21 Hanging materials 22 Receiving materials 23 I-shaped steel 24 and 25 Brackets 26 Spherical bushes 27 Connecting fittings 28 Shaft holes 29 Boss sections 30 Flange 31 Connecting fittings 32 Boss sections 33 Round Rack 34 Wheel 35 Airframe 36 Motor 37 Wire rope 38 Hook 39 Universal joint 40 First drive vehicle 41 Axis 42 Joint 43 Second drive vehicle 44 Airframe 45 Motor 46 Speed reducer 47 Gear 48 Protrusion 49 49 Franc 50 stiffener 51 balance weight

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nobuwa Kita 193-1 Yamashita-cho, Naka-ku, Yokohama-shi, Kanagawa Sato Industry Co., Ltd. Yokohama Branch (72) Inventor Yasuhiro Ishibashi 5-12-12 Kameari, Katsushika-ku, Tokyo KM Engineering Co., Ltd.

Claims (2)

[Claims] 1. A segment transfer rail device for constructing a crane rail for moving a crane that suspends a segment by connecting three rails having the same shape and the same size in cross section at a bent portion of a tunnel. , The front end of the front rail is supported by a fixed part near the erector for forming the inner wall of the tunnel, and the rear end of the rear rail is supported by the trailing truck that follows the excavator, and the rear end of the front rail and the rear rail are supported. A segment transfer rail device in which a front end is supported by a device driven by an excavator, and front and rear ends of an intermediate rail are laterally adjustable with respect to front and rear ends of a front rail. 2. The segment transfer rail device according to claim 1, wherein the fixed portion near the erector is an outer cylinder of a screw conveyor for carrying out discharged soil or a support frame of a belt conveyor.