JP2663097B2 - Shield machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield excavator for starting a branch shield from an existing main pipe, joining a branch road excavation shield to the main pipe, and continuously cutting a vertical shaft and a horizontal shaft.

[0002]

2. Description of the Related Art When constructing a tunnel, for example, a shaft is first excavated into the ground by the caisson method, and then a tunnel machine such as a shield machine is suspended from the surface of the shaft and lowered to the bottom of the shaft. From there, it is common practice to launch the tunnel machine sideways and excavate the shaft.

[0003] Recently, a tunnel excavator capable of excavating a vertical shaft and a horizontal shaft with one excavator has been proposed. That is,
At the lower end of a shield excavator for shaft excavation, a spherical seal body was provided, and a shield excavator for horizontal shaft excavation was accommodated in this spherical seal body so as to be able to turn around a horizontal axis orthogonal to the central axis of the excavator When excavating a shaft, the circular cutter disk at the lower end of the shield excavator for shaft excavation is connected to the disk-shaped cutter disk of the shield excavator for horizontal shaft excavation by pins such as pins that are remotely operated by a cylinder device. The shaft is excavated by rotating the shaft integrally with the shaft connected. Then, when the drilling depth has been reached, the connection between the disc-shaped cutter disc and the annular cutter disc of the shield excavator for horizontal shaft excavation by the connecting tool is released, and the disc-shaped cutter disc is pulled upward. Leaves the shield tunneling machine for horizontal shaft excavation. Then, the shield excavator for horizontal shaft excavation is turned in a vertical direction by approximately 90 ° from a downward posture to a horizontal posture, and the horizontal shaft (horizontal direction) is excavated while being propelled in a horizontal direction. (For example, JP-A-3-191196,
(See JP-A-4-20698)

[0004]

In the above-mentioned conventional general method (the former), it is necessary to prepare a dedicated machine for excavation of a pier, in addition to a shield excavator for excavating a horizontal shaft. In addition to the high cost, it requires a lot of preparation work before excavation of the horizontal shaft, such as raising the digging machine after the end of the pit excavation and then hanging the shield machine down to the bottom of the pier. Work becomes complicated.

The excavator (the latter) described in the above-mentioned publication is
Disengagement of the shield drilling machine for horizontal drilling from the shield drilling machine for vertical drilling, in other words, disconnection of the disk-shaped cutter disk and the annular cutter disk, causes both cutter disks to be pressed against the ground and immersed in muddy water. State, and
It will be done under significant pressure. For this reason, all operations required for disconnection, such as operation of the connection tool, are performed by remote control, and the operator cannot directly check the disconnection state visually or the like.

An object of the present invention is to provide a tunnel excavator that can start a branch shield.

[0007]

SUMMARY OF THE INVENTION In order to solve the problems of the prior art, a configuration of the present invention is a tunnel excavator in which a branch shield excavator is built so as to be able to change its direction. At the location, forming an opening for branch road excavation surrounded by a cylindrical inward entrance sleeve, this opening can be cut by the branch shield excavator, and closed with a concrete material having pressure resistance, The center axis of the branch shield machine is provided on the pedestal so that the center axis of the shield machine of the main pipe coincides with the base, and the branch shield can be slid forward and backward with respect to the pedestal. The center axis of the excavator coincides with the center axis of the concrete material, and the cylindrical shield constituting the branch shield excavator On both sides of the rate, it is provided with a longitudinal slide, the connecting piece of the wire for turning the branched shield machine.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cross-sectional plan view of the shield machine, FIG. 2 is a vertical front view of the shield machine, FIG. 3 is a vertical side view of the shield machine, and FIG. 4 is a vertical front view of the start of the branch shield machine.

In FIG. 1, a shield excavator 1 is an excavator for excavating a horizontal shaft, and a cutter disk 3 is disposed at a tip of a cylindrical shield plate 2 used only for lateral excavation. The inner surface of the cutter disc 3 is integrally connected to a circular bulkhead 4 and an annular frame 5. An annular portion 7 protruding around the inner surface of the bulkhead 4 is loosely inserted into an annular frame 6 at the distal end of the shield plate 2, and a bearing 8 is provided.
The bulkhead 4 is rotatably supported together with the cutter disk 3 via the. Seal members 9 are interposed between the annular frame 6 and the annular portion 7 and between the annular frame 6 and the inner surface of the bulkhead 4.
In the figure, reference numeral 10 denotes a shield jack.

[0010] Branch shield machine 11 for branch anti-excavation
Is provided with a cylindrical shield plate 12 having a smaller diameter than the shield machine 1. A bulkhead 13 is formed at the distal end of the shield plate 12, and a disk-shaped cutter disk 14 is rotatably supported via a bearing 15 on the outside (tip) of the bulkhead 13. Further, a ring gear 17 is fixed to an annular frame portion 16 inside the cutter disk 14, and a pinion 19 of a hydraulic motor 18 disposed on a circumferential surface of the shield plate 12 is meshed with the ring gear 17, Reference numeral 14 is configured to be rotated by a hydraulic motor 18. Further, a plurality of shield jacks 20 are provided along the circumferential surface of the shield plate 12 toward the base end.

As shown in FIG. 2, in the shield machine 1, the center axis of the branch shield machine 11 is made to coincide with the center axis of the shield machine 1, and as shown in FIG. The cutter disk 14 of the machine 11 has its tip inserted into the annular frame portion 16. In this state, the cutter disk 14 is detachably connected to the bulkhead 13 by a plurality of bolts 21. In the figure, 22 is an annular guide sleeve, 23 is a mud pipe, 24 is a drain pipe, 25 is a tail portion of a shield plate, and 26 is an erector ring.

Next, a slide mechanism and a turning mechanism of the branch shield machine 11 will be described with reference to FIGS. 2
Reference numeral 7 denotes a pedestal. On the upper surface of the pedestal 27, a groove 28 is formed along the center axis direction of the shield machine 1. A pedestal 29 is slidably mounted on the pedestal 27, and a columnar pin 30 provided on the lower surface of the pedestal 29 is fitted into a groove 28 of the pedestal 27, and the pedestal 29 is inserted into the groove 28. It is configured to slide along. The branch shield machine 11 is mounted on a gantry 29, and a fall prevention member 31 is interposed between both sides of the shield plate 12 constituting the branch shield machine 11 and the gantry 29. At the left and right rear ends of the shield plate 12, wire connecting pieces 32 are provided. Wires 33 are respectively connected to the wire connecting pieces 32, and are pulled by a winch (not shown) so that the branch shield machine 1
The gantry 29 on which the cradle 1 is mounted slides on the pedestal 27.

In the shield machine described above, the present invention relates to a shield excavator for excavating a branch road surrounded by a cylindrical inward entrance sleeve 34 at a required position on one side of the shield plate 2 for excavating the main pipe. An opening 35 is formed, and the opening 35 can be excavated by the branch shield machine 11,
And it is closed with a concrete material 36 having pressure resistance. This concrete material 36 is, for example,
It is a concrete structure using a reinforced reinforcing material in which any one of carbon fiber, glass fiber and aramid fiber is impregnated in a resin. In the figure, reference numeral 37 denotes an annular entrance packing.

[0014]

[Explanation of Operation] After excavating the cross shaft to a predetermined position by the shield excavator 1 for main pipe excavation, all the bolts 21
To make the branch shield machine 11 free. Then, both wires 33 connected to the wire connecting piece 32 are pulled by a winch, the gantry 29 is moved until the center of the pin 30 coincides with the center axis of the concrete material 36, and the one wire 33 is branched while being pulled. The shield excavator 11 is turned so that the cutter disk 14 faces the plate surface of the concrete material 36. The central axis of the concrete material 36 and the branch shield machine 11
At the stage when the center axes of the two coincide, as shown in FIG. 4, a reaction force receiver 38 also serving as a starting base is temporarily installed in the shield machine 1,
Then, the shield excavation is performed by the shield jack 39, the concrete material 36 is cut from the inside, and the branch shield excavator 11 is started to the outside through the opening 35. In the figure, reference numeral 40 denotes a temporary segment.

[0015]

According to the configuration of the present invention as described above, the following effects can be obtained. In a tunnel excavator equipped with a branch shield excavator capable of changing direction, a branch excavation opening surrounded by a cylindrical inward entrance sleeve is formed at a predetermined position on one side of a shield plate for main pipe excavation. However, since this opening can be cut by the branch shield excavator, and closed with a concrete material having pressure resistance, it is possible to continuously excavate the fork following the main tunnel lateral excavation. Of course, branching shield excavation can be started simply by cutting the opening closed with concrete material from the inside, and in addition, there is no need for ground improvement near the branch part, so economical and significant improvement in the construction process Is expected.

[Brief description of the drawings]

FIG. 1 is a cross-sectional plan view of a shield machine.

FIG. 2 is a vertical sectional front view of the shield machine.

FIG. 3 is a vertical sectional side view of the shield machine.

FIG. 4 is a longitudinal sectional front view showing the start of the branch shield machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Shield machine 2 Shield plate 3 Cutter disk 4 Bulkhead 5 Annular frame 6 Annular frame 7 Annular part 8 Bearing 9 Seal member 10 Shield jack 11 Branch shield excavator 12 Shield plate 13 Bulkhead 14 Cutter disk 15 Bearing 16 Annular frame part 17 Ring Gear 18 Hydraulic Motor 19 Pinion 20 Shield Jack 21 Bolt 22 Guide Sleeve 23 Mud Feeding Tube 24 Mud Draining Tube 25 Shield Plate Tail 26 Erectoring 27 Base 28 Groove 29 Mount 30 Pin 31 Falling Prevention Material 32 Wire Connecting Piece 33 Wire 34 Entrance sleeve 35 Opening 36 Concrete material 37 Annular entrance packing 38 Reaction force receiving 39 Shield jack 40 Temporary segment

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tetsushi Sonoda 2-5-8 Kitaaoyama, Minato-ku, Tokyo Intra-company group (72) Inventor Susumu Sarada 2-4-1, Hamamatsucho, Minato-ku, Tokyo Kawasaki Heavy Industries Tokyo Head Office (72) Inventor Keiji Matsumura 2-4-1 Hamamatsucho, Minato-ku, Tokyo Kawasaki Heavy Industries, Ltd. Tokyo Head Office (56) References JP-A-2-210194 (JP, A)

Claims (3)

(57) [Claims] 1. A tunnel excavator in which a branch shield excavator is installed so as to be able to change its direction. A branch excavation surrounded by a cylindrical inward entrance sleeve at a predetermined location on one side of a shield plate for main excavation. Forming an opening for
This opening can be cut by the branch shield excavator,
A shield machine that is closed with a concrete material having pressure resistance. 2. The center axis of the branch shield machine is
A main excavator is provided on the pedestal so that the central axis of the excavator coincides with the pedestal, and is slidable back and forth with respect to the pedestal, and is provided so as to be pivotable. The shield machine according to claim 1, wherein the shield machine is configured to coincide with the central axis. 3. The shield machine according to claim 1, wherein a connecting piece of a wire for forward and backward sliding and turning of the branch shield machine is provided on both sides of a cylindrical shield plate constituting the branch shield machine. .