JPS615199A - Shield 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 large-diameter shield machine used when constructing a horizontal shaft such as a tunnel underground.

(Prior art) Fig. 1 shows a conventional example of a shield machine in which the cutter is driven by a center shirt 1. 4' side, and a rotatable rotary excavator 3' for excavating the face is provided in front of the buoyant bar 3'. This rotary digging tool 5' is fixed to the tip of the tip 6', the proximal end is fixed to the 7° boss, and a plurality of rotary excavators 5' extend in a radial direction toward the 1st circumference of the shield tube 1°. The spoke 8' is provided with a bit 9' provided on the front surface of the spoke 8', and a middle rJ+ drilling pit 1 to 10' protruding and fixed to the tip of the boss 7'. Also, center shirt]・6 is a rotation transmission mechanism 11 consisting of gears.
It is connected to a cutter drive motor 12' by turning the cutter 12', and by driving the cutter 12', the rotary excavator is rotated by 5 degrees to excavate the face.

In addition, in ]2, the center shaft 6' receives (pulls) loads in the thrust I direction and the radial direction when the rotary excavator 1' excavates the face using bearing mechanisms 13', 14'.
, 15', etc.

16" is an over cutter that can be freely protruded from the outer periphery of the spoke 8', and is used when the shield machine performs curved construction. 17' is an over cutter that can be protruded or retracted from the tip of the spoke. One end of the hydraulic pipe 18゛ is connected to this hydraulic jack 17゛, and the other end of the hydraulic pipe 18゜ [J
Hydraulic system (not shown) on the rear truck passes through spoke 8゛ and center shut 6° and is installed at the rear end of 6′ to hintersha 71 via swivel joint 19°.
is connected to.

In addition, 20' is a manlock installed at the upper part of the bulkhead 2', which is used to perform work by applying pressure to the face when an obstacle appears on the face or when it is necessary to change personnel. This is after the I-command, which pressurizes and depressurizes the workers who go in and out of the shield mine 4'' side and the face side.

However, if this J: sea urchin cutter drive system is Hintershaft It is necessary to thicken the hinter shaft 6', etc., which causes the problem that the weight of the shield machine increases. In addition, the bearing mechanism 13', 14°, 15° that receives the load
[Since it is attached to the outer periphery of the J center shut 6°, the size that can be removed is limited by the diameter of the center shut 6'. Therefore, the load acting on the rotary excavator 5' may cause significant wear and tear. Furthermore, almost all of the hydraulic pipes 18' are spokes 8', center shirt!・Since it passes within 6 degrees, the hydraulic pipe 18
There is a drawback that if the joint part of ' is dislodged or a blockage occurs at a bent part, it cannot be easily repaired. In addition, in case an obstacle appears on the face or when replacing a man, a 20mm manlock is provided.
Since the size of the pipe is limited, the environment during pressurization and depressurization becomes poor, and large materials and equipment cannot be installed. Furthermore, when installing the Manlock 20, the rotation transmitter 411ii1' for driving the rotary excavation tool -5-degree is housed near the center of the bulkhead.
2゛ shield tube 1' can be inspected at a position close to 1', so in order to inspect all of the large-diameter shield machine at - location (due to lack of J), several people can inspect the work opening. It is impossible to install them at the same time, and if several new shields are installed, this has the disadvantage that it will interfere with normal shield progress.

For this reason, a shield machine that solved the above-mentioned drawbacks was developed in the 14th century.
9-672. It has already been proposed by the applicant as No. 41 (-3, however, in this shield machine, CLl, , person l-th, and D shield machine's central part have relatively large diameter work. In this case, no consideration was given to mixing the excavated earth and sand in part e. It had not been done. As a result, the rotation of the rotary excavation tool with sand deposited in the center (=J deposit, 81, which may accumulate or solidify, which may have a negative impact on excavation, or which is installed in front of the rotation transmission member), may occur. There were some inconveniences. In addition, in this type of earth pressure type shield machine that presses down the face using the earth pressure of mud, (
”Knead the excavated soil to press down the face! '7J
'Although this is an important issue, the above-mentioned shield machine has the drawback that mixing in the center is insufficient.

(Object of the Invention) The present invention has been proposed in view of the above-mentioned points, and its purpose is to provide a hollow hole X/groove-like structure for forming a working chamber inside the driving shaft of an excavating tool. A first rotary excavator is constructed of a rotation transmitting member, and a first rotary excavator for excavating an artificial diameter horizontal shaft is installed in the rotary transmitting section, and a second rotary excavator for excavating the central part in front of the rotation transmitting member. To provide a large-diameter shield machine with a mixing device provided between a second rotary excavator and a first rotary excavator, and capable of performing sufficient mixing even in the central part. be.

(Structure of the invention) Hereinafter, the present invention will be explained along with the drawings.

Figure 2 shows an embodiment of the present invention, in which 111 in the figure is a shield tube with a diameter of about 16 m, for example, and a partition wall 2 formed at the front part connects the hair bow/bar 3 on the face side. The shaft is divided into a shield shaft 4 side, and a first rotary excavator 5 for excavating a horizontal shaft of 1 diameter is provided on the front face side of the bulkhead 2. This rotary excavator has a plurality of spokes 6 extending radially toward the outer periphery of the shield tube 1, and a large number of humans 7 are attached to the front surface (face side) of the spokes 6 for cutting the beams. A kneading device 118 is installed at the back for stirring the excavated earth and turning it into mud. The proximal ends of the spokes 60 are fixed to the external front end of a drum-shaped rotation transmission member 10 that can be rotated by the drive of the gear 9, so that power can be transmitted. A mixing blade 11 is provided on the front end surface of the drill bit 10 and, if necessary, at the base end of the front end of the spoke 6, and extends forward toward a second rotary excavator 1, which will be described later.

On the other hand, the inside of the rotation transmitting member 10 is hollow to form a working chamber, and is provided at the center of the partition wall 2 so as to pass through the partition wall 2. 1 of this rotation transmission section 4410
-In conclusion, if the diameter of the shield cylinder 1 is about 16 m, it is preferable to form it to a diameter of about 4 m, for example, but as long as it functions as a working room, it is sufficient. It may be around 2m. Therefore, a manball 27 is appropriately provided at the rear end 10a of the rotation transmitting member 10 so that a person can enter and exit the interior, but normally this manhole 27 is closed with a manhole cover 28. There is. It goes without saying that a reinforcing material (not shown) may be provided inside the hollow rotation transmission member 10 as necessary to increase its rigidity.

V is a second rotary excavator which is driven independently of the 20th rotary excavator and excavates the central part;
The area that cannot be excavated by the rotary excavator i, that is, the front surface 1J of the rotation transmitting member 10, is excavated by the rotary excavator i. This first rotary excavator V is provided with a boss 1 provided at the distal end of a central support member 13 that is provided through the approximate center of the rotation transmission member 10 and whose distal end protrudes into the section A.
A plurality of spokes 15 whose base ends are fixed to the shield tube 4 and which extend radially toward the outer periphery of the shield cylinder 1, a number of bits 16 provided on the front surface of the spokes 15, and Central drilling bits 11 and 17 provided at the tips, and a mixing tool 1I1 extending rearward at the rear of the spokes 15 and provided on the first rotary drilling tool -5- mentioned above.
It is made up of a plurality of mixing blades 18, etc., which are provided intersectingly so as not to collide with each other. And via the rotation transmission mechanism 19, the cutter drive! l] is connected to a cutter 20, and by driving the cutter drive motor 20, the second rotary excavator 12- is rotated to excavate the ground.

In addition, if necessary, a swivel join (-
S (), and the center of the central support member 13 is formed hollow, and a mud material injection port a is provided at the tip thereof, so that mud material can be injected into the ground during excavation work. It is suitable for turning excavated soil into mud.

Thus, the earth and sand excavated by the 20th rotary excavator M stays in the chamber 3 together with the earth and sand excavated by the first rotary excavator-1, and is discharged by the discharge mechanism 21, which will be described later. Is the 7i rope also an ejection mechanism? 1 is a well-known scraper conveyor which has a built-in scraper 23 in a casing 22 whose tip part passes through the partition wall 2 and communicates with the pump A7, and is for discharging the earth and sand in the chamber 3 to the outside. It is. In addition, during excavation, the soil excavated by the first rotary excavator and wrapped around the rear of the spoke 15 is mixed with Ii.
! 11. Since the earth and sand are stirred by 18 and moved to the side of the first rotary excavator, the earth and sand will not accumulate on the back of the second rotary excavator 1λ, and the soil pressure will be uniform due to the effect of mixing. The aim is to promote soil removal and sediment discharge.

In addition, since the mixing blades 11 and 18 are arranged to intersect with each other, the relative movement due to the difference in the rotational speed between the first rotary excavator 5 and the first rotary excavator lift is prevented. By repeating contact and separation, the effect of kneading is enhanced.

On the other hand, the drive motors 9 and 20 each have a frame 1124.
Manholes 25 are provided at appropriate locations on this frame 24 through which people can go in and out, but normally they are blocked by manholes 126.

The inside of the rotation transmitting member 10 is a working chamber 29 with a space of 4J to 1J secured for each working day, and a manhole 30 for exiting to the face is provided at the front end of the chamber 29 as appropriate. Although it is provided, it is usually not until 11:00 that it is blocked by an old manhole lid. And for some reason, the face or work room? 9- If a worker needs to enter the work room, the manhole cover 28 can be closed and the work can be easily carried out through the manhole 27. 9, and can also go out to the face through the J manhole 30 for inspection, repair, etc.

f, 'K Jj, 32.33 etc. in the map is the bearing mechanism that supports the load in the rotating excavation tool'-direction and radial direction, and 34 is the overpass used by the shield machine when constructing curves. Cutter, 35 is spoke 6
It is a hydraulic shirt ↑ for protruding and retracting the cane 34 from the tip, and is connected to one end of the hydraulic pipe 3G (J oil - pipe 7: 135, and the other end (J
It passes through the inside of the spoke 6 and the hollow part of the rotation transmission member 10 and is connected to the oil ff system (not shown) of the rear truck via a swivel joint 37 installed at the rear of the central support member 13. .

Although not particularly shown in the above-mentioned embodiment, it is of course possible to inject the muddy soil material into the jumper 3, for example, by iQ+NO, if necessary. It goes without saying that the present invention can also be applied to a muddy pressurized shield machine that discharges earth and sand by means of fluid transport.

(Effects of the Invention) As described above, according to the present invention, in a large-diameter shield machine, the first rotary excavator is placed in a hollow rotation transmission member having a working chamber therein, and the rotation transmission member Take a second rotary excavating tool in the hand 4 of the central part 14, which is installed through the Wire mix 1 to mix the center part between the first rotary excavation tool! 'Because it is configured with wings, it is possible to efficiently mix lines in the center even with a large-diameter shield machine, and there is no possibility that excavated soil will accumulate on the back of the rotary excavator placed in the center. , to have a negative impact on the shield machine's digging.

1k, there was a problem with the rotation of the rotating drilling tool in the center.

Furthermore, it is possible to effectively mix the lines in the center, and it is possible to obtain 1q of uniform soil 11.

There is one point.

[Brief explanation of drawings]

Figure '1 (J is a conventional example, ('l is a front view, (opening) is a side sectional view, Figure 2 is an embodiment of the present invention, (I is a front view,
(1]) is a side sectional view.

Claims (1)

[Claims] In a large-diameter shield machine, a first rotary excavator is attached to a hollow rotation transmission member that has a working chamber therein, and a second rotary excavator is attached to a central support member provided through the rotation transmission member.
A rotary excavator is attached and arranged at the front central part of the first rotary excavator, and a mixing blade for mixing the central part is provided between the second rotary excavator and the first rotary excavator. Characteristic shield machine.