JP2016183556A - Backfill material grouting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a backfill material grouting device which is advantageous in making a shield machine perform boring smoothly and efficiently, even in soft ground or hard ground.SOLUTION: A backfill material grouting device is provided, in which: when boring and advancing in soft ground, a first backfill material grouting part 30 is protruded by an actuator 44 to a grouting position (a), and a simultaneous backfill material grouting method is performed for grouting backfill material from the first backfill material grouting part 30 almost simultaneously with generation of a tail void 22; and when boring and advancing in hard ground, the first backfill material grouting part 30 is set by the actuator 44 to a storing position (b), a plug for a backfill material grouting hole in a segment C separated at the rear part of a rear trunk part 14, is removed, and an instantaneous backfill material grouting method is performed for grouting the backfill material from a second backfill material grouting part 32 into the tail void 22 through the backfill material grouting hole.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a backing material injection method and a backing material injection device in a shield method.

Conventionally, in excavation by a shield machine, a backing material is filled in an annular gap (tail void) between an inner peripheral surface of a drilling hole excavated by a cutter at the tip thereof and an outer peripheral surface of a segment to be installed, We try to prevent problems such as intrusion into the spring water segment and land subsidence.
As a method of injecting the backing material, a simultaneous backing material injection method in which the backing material is injected almost simultaneously with the generation of the tail void, and a backing material injection of the segment located at a position behind the rear body of the shield machine There is known an immediate back material injection method for injecting a back material from a hole.
In particular, the simultaneous backing material injection method does not require desorption work of the injection nozzle into the backing material injection hole every time it progresses, so it improves work efficiency and reduces the cost of tunnel construction compared to the immediate backing material injection method. It is advantageous in planning.

JP 2010-59607 A JP 2000-170495 A

On the other hand, the simultaneous backing material injection method has a structure in which the backing material injection part of the backing material injection device is attached to the outer peripheral surface of the rear body part of the shield machine, and after the backing material injection part is attached The portion of the body portion protrudes outward in the radial direction of the rear body portion.
For this reason, there is no problem when excavating soft ground, but when it is necessary to advance to hard ground such as rock during the excavation, the backfill material injection part hits the inner periphery of the excavated hole and There is a problem that the excavation by the shield machine cannot be performed smoothly because the material injection part is damaged.
The present invention has been devised in view of the above circumstances, and the object of the present invention is to carry out the simultaneous backing material injection method on soft ground while carrying out the immediate backing material injection method on hard ground. An object of the present invention is to provide a backing material injecting method and a backing material injecting apparatus that are advantageous for smoothly and efficiently excavating a shield machine, whether it is a soft ground or a hard ground.

In order to achieve the above object, the method of injecting a backing material according to the present invention comprises forming an opening penetrating the rear body portion in a rear body portion of a shield machine having a cutter at the tip, A first backing material injection portion and an immediate backing material injection method for arranging a simultaneous backing material injection method capable of being connected and separated to the backing material supply portion while arranging a material supply portion inside the rear trunk portion A second backing material injection section for implementation, the first backing material injection section is arranged in the opening, and the backing material supply when the shield machine digs up a soft ground And the first backing material injecting portion in a state where the first backing material injecting portion is in contact with an edge portion of the opening portion and radially outward of the rear body portion from the opening portion. Injecting the back material from the first back material injection part to the tail void, and the shield machine is hard When proceeding to the board, the first backing material injecting portion is accommodated from the opening to the inside of the rear trunk while contacting the edge of the opening, and the first backing material injecting portion. The opening is closed and the storage position is closed, the backing material supply section and the second backing material injection section are connected, and the second backing material injection section separates the rear body portion behind the rear trunk section. The back material is injected into the tail void through the back material injection hole of the segment located at the position.
Further, the backing material injecting device of the present invention includes a backing material supply unit disposed inside a rear trunk part of a shield having a cutter at a tip, an opening formed through the rear trunk part, and the opening. An injection position that protrudes radially outward from the rear body portion and allows the injection of the backing material into the tail void; and a storage position that is housed inside the rear body portion from the opening portion and closes the opening portion. A first backing material injecting portion that is movably provided in contact with the edge of the opening between and connected to and separated from the backing material supply portion; and the backing material injecting portion at the injecting position. And a second back that can be connected to and separated from the backing material supply part and can be connected to the backing material injection hole of the segment located at a position away from the rear body part. It is characterized by including a filling material injection part.

In the present invention, when the cider machine digs a soft ground, the first backing material injection portion is set as the injection position, the backing material is injected from the first backing material injection portion into the tail void, and the simultaneous backing material injection is performed. Implement the method.
When the cider machine digs up the hard ground, the first backing material injection part is set to the storage position in which it is stored in the rear trunk part, and projections are eliminated from the outer peripheral surface of the rear trunk part.
And a backing material is inject | poured into a tail void from the 2nd backing material injection | pouring part through the backing material injection | pouring hole of the segment away to the back of the back trunk | drum, and an immediate backing material injection | pouring method is implemented.
Therefore, the excavation by the shield machine on the soft ground and the hard ground is smoothly and efficiently performed.

(A) is a side view of a state in which the shield machine is digging while performing the simultaneous backing material injection method, and (B) is a view of the shield machine from the rear of the rear trunk. (A) is a side view of a state where the shield machine is digging while performing the immediate backing material injection method, and (B) is a view of the shield machine viewed from the rear of the rear trunk. It is explanatory drawing of the 1st back material injection | pouring part located in an injection | pouring position, (A) is a top view, (B) is BB sectional drawing of (A), (C) is CC arrow view of (A). is there. It is explanatory drawing of the 1st back material injection | pouring part located in a storage position, (A) is a top view, (B) is BB sectional drawing of (A), (C) is CC arrow view of (A). is there.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the shield machine 10 includes a front body portion 12 having a cutter 1202 at the front end, and a rear body portion 14 connected to the front body portion 12 so as to be bent.
A motor for rotating the cutter 1202 and a conveyor device for discharging excavated earth and sand are arranged inside the front trunk portion 12, and an erector for assembling the segment C and a jack for excavation are arranged inside the rear trunk portion 14. Is arranged.
The segment C is provided with a backing material injection hole regardless of whether or not it is used, and the backing material injection hole is closed with a stopper.

A rectangular opening 16 that is long in the front-rear direction is provided at the front and upper portion of the rear trunk portion 14.
As shown in FIG. 3, the opening 16 is formed by an inner peripheral portion of a rectangular frame-shaped packing 18 attached to a rectangular cutout of the rear trunk portion 14.
Further, as shown in FIG. 1, a wire brush 20 is provided on the inner peripheral surface of the rear end of the rear trunk portion 14.
The wire brush 20 holds the inside of the rear trunk portion 14 in a watertight manner against the tail void 22 that is an annular space between the inner peripheral surface of the excavation hole 19 and the outer peripheral surface of the segment C. Intrusion into the portion 14 is prevented.

The backing material injecting device 24 fills the tail void 22 with the backing material and prevents intrusion of spring water into the segment C or ground subsidence.
The backing material injection device 24 includes a backing material supply unit 26, a first backing material injection unit 30 for performing a simultaneous backing material injection method that can be connected to and separated from the backing material supply unit 26, and FIG. And a second backing material injection portion 32 for carrying out the immediate backing material injection method shown.
As the backing material, various conventionally known materials such as a material in which materials are mixed in advance such as mortar and a material in which a curing agent is mixed with a main agent immediately before injection can be used.
Moreover, the injection | pouring part of the various structure for implementation of the conventionally well-known simultaneous backing material injection | pouring method corresponding to a backing material is employable as internal structures, such as the injection path of the 1st backing material injection | pouring part 30. FIG. .
Further, the second backing material injecting section 32 can employ various configurations of injecting sections for carrying out a conventionally known immediate backing material injecting method corresponding to the backing material.

The backing material supply unit 26 is disposed inside the rear trunk unit 14.
The backing material supply unit 26 includes a backing material storage tank 2602, a piping 2604 that detachably connects the storage tank 2602 and the first and second backing material injection units 30, 32, and a back of the storage tank 2602. A pump 2606 for pumping the filling material to the injection passages of the first and second backing material injection portions 30 and 32 via the pipe 2604, a washing water tank 2608 for washing water for washing the piping 2604 and the injection passage, A pump 2610 and a pipe 2612 for pumping the cleaning water in the tank 2608 to the first and second backing material injection sections 30 and 32 are configured.
The tip portions of the pipes 2604 and 2612 can be connected and separated from the first and second backing material injection portions 30 and 32 via the joint 34. More specifically, a ball valve (open / close valve) 36 is provided at the tip of the piping on the first and second backing material injecting portions 30 and 32 side, and at the tip of the piping on the backing material supply portion 26 side. A ball valve (open / close valve) 38 and a joint 34 are provided, and a ball valve 36 at the tip of the piping on the first and second backing material injection portions 30 and 32 side is detachably coupled to the joint 34.

The first backing material injection part 30 has a frame (cylinder block) provided with an injection path for the backing material, and the frame is disposed in the opening 16.
As shown in FIG. 4 (A), the frame has a rectangular plate shape in which the four side surfaces are in elastic contact with the inner peripheral portion of the packing 18, and as shown in FIGS. 3 (B) and 4 (B), the front end As shown in FIG. 3C and FIG. 4C, the discharge port 3002 through which the backing material is discharged faces the tail void 22. It is formed on the rear side of the frame.

Support shafts 40 project from both side surfaces on the front end side of the frame, the support shafts 40 pass through the packing 18, and the end portions of the support shafts 40 are rotatably supported by bearing portions 42 provided on the rear body portion 14. Has been. Accordingly, the first backing material injecting portion 30 is disposed in the opening 16 so that the front end is a fulcrum and the rear end is displaceable in the radial direction of the rear body portion 14, that is, is swingably disposed. .
The first backing material injection part 30 projects from the opening 16 to the outside of the rear body part 14 in the radial direction and allows injection of the backing material into the tail void 22. It is provided so as to be swingable while being in contact with the edge of the opening 16 (inner peripheral part of the packing 18) between the storage position (b) stored in the body 14 and closing the opening 16. Yes.
Therefore, the first backing material injection portion 30 is always in contact with the edge portion of the opening 16 (the inner peripheral portion of the packing 18), regardless of the position of the first backing material injection portion 30. Intrusion from the opening 16 such as spring water or earth and sand to the inside of the rear trunk 14 is prevented.

The frame of the first backing material injecting portion 30 has an inner surface facing the inside of the rear body portion 14 and an outer surface 3010 positioned opposite to the inner surface as shown in FIGS. 3 and 4.
As shown in FIG. 1 and FIG. 3 (B), the outer surface 3010 at the injection position (A) is located on the front end side of the shield machine 10 in the radial direction of the rear barrel portion 14. Is inclined so as to be gradually displaced outward in the radial direction of the rear trunk portion 14 from a location located on the front end side of the shield machine 10 to a location located on the rear side of the shield machine 10. .
Moreover, the outer surface 3010 is formed of a cylindrical surface having the same diameter as the outer peripheral surface of the rear trunk portion 14 as shown in FIG.
In the storage position (b), the outer surface 3010 is located on the same plane as the outer peripheral surface of the rear trunk portion 14.

  The swing of the first backing material injection portion 30 to the injection position (A) and the storage position (B) is performed by the operation of the actuator 44. In this embodiment, a hydraulic cylinder is used as the actuator 44, and the hydraulic cylinder When the hydraulic cylinder is contracted, the first backing material injecting portion 30 is in the storage position (b).

Next, a back material injection method using the back material injection device 24 will be described.
When digging a soft ground with the shield machine 10, as shown in FIG. 1, the first backing material injection portion 30 is projected to the injection position (A) by the actuator 44 and the backing material 2604 is used as the backing material. The supply unit 26 and the first backing material injection unit 30 are connected, and a simultaneous backing material injection method is performed in which the backing material is injected from the first backing material injection unit 30 almost simultaneously with the generation of the tail void 22.
In the present embodiment, at the injection position (A), the first backing material injection portion 30 is inclined so as to be gradually displaced outward in the radial direction of the rear trunk portion 14 toward the rear. The resistance of the first backing material injecting portion 30 with respect to the inner peripheral portion of 19 is small, which is advantageous for smoothly digging the shield machine.

When it is necessary to proceed from soft ground to hard ground such as rock during the excavation, the pump 2606 is stopped, and the injection of the backing material from the first backing material injection part 30 to the tail void 22 is stopped. As shown in FIG. 2, the first backing material injection part 30 is set to the storage position (b) by the actuator 44.
Further, the ball valves 36 and 38 are closed, respectively, and the front portion of the backing material pipe 2604 is separated from the first backing material injection portion 30 through the joint 34.
Further, the tip of the backing material pipe 2604 is connected to the ball valve 36 of the second backing material injection unit 32 via the joint 34, and the backing material supply unit 26 and the second backing material injection unit 32 are connected. And connect.
Then, the plug of the backing material injection hole of the segment C corresponding to the portion where the backing material is not injected is removed, and the tail void 22 is passed from the second backing material injection portion 32 through the backing material injection hole of the segment C. Inject the backing material.

That is, as shown in FIG. 2, an immediate backing material injection method for injecting the backing material into the tail void 22 from the backing material injection hole of the segment C separated from the rear body portion 14 while digging is now performed. Do.
Therefore, when excavating a hard rock mass, there is no protrusion on the outer peripheral surface of the rear trunk portion 14, and the excavation by the shield method is smoothly performed.
In the present embodiment, when the hard rock is dug, the first backing material injection portion 30 is changed from the injection position (b) to the storage position (b), and the storage position (b) is shown in FIG. As described above, since the outer surface 3010 of the first backing material injecting portion 30 is located on the same surface as the outer peripheral surface of the rear trunk portion 14, when the hard rock is dug, the first backing material injecting portion 30 is There is no resistance, and the excavation by the shield method is carried out smoothly.

In addition, the movement of the 1st back material injection | pouring part 30 between an injection | pouring position (I) and a storage position (B) is not limited to rocking | fluctuation, A linear motion may be sufficient. However, when the first backing material injection part 30 is swung as in the embodiment, the volume of the first backing material injection part 30 protruding into the rear body part 14 at the storage position (b) is reduced. This can be reduced, which is advantageous for downsizing.
Further, in the present embodiment, the case where the shield machine 10 digs from a soft ground to a hard ground has been described. In the soft ground, the simultaneous backing material injection method is performed with the first backing material injection portion as the injection position (I). In the hard ground, the first backing material injection part is set to the storage position (b), and the immediate backing material injection method is performed from the second backing material injection part, so that soft ground and hard ground can be obtained during excavation. Even when they appear alternately, excavation by the shield method can be performed smoothly and efficiently.

  DESCRIPTION OF SYMBOLS 10 ... Shield machine, 12 ... Front trunk | drum, 14 ... Rear trunk | drum, 16 ... Opening part, 18 ... Packing, 22 ... Tail void, 24 ... Backing material injection apparatus, 26 ... Backing up Material supply section, 2602 .. Backing material storage tank, 2604 .. Backing material piping, 2606... Backing material pump, 2608 .. Washing water tank, 2610 .. Cleaning water pump, 2612. Pipe for cleaning water, 30... 1st backing material injection part, 32... 2nd backing material injection part, 40... Support shaft, 42 .. bearing part, 44. .

The present invention relates to a backing write material injection device that put the shield tunneling.

On the other hand, the simultaneous backing material injection method has a structure in which the backing material injection part of the backing material injection device is attached to the outer peripheral surface of the rear body part of the shield machine, and after the backing material injection part is attached The portion of the body portion protrudes outward in the radial direction of the rear body portion.
For this reason, there is no problem when excavating soft ground, but when it is necessary to advance to hard ground such as rock during the excavation, the backfill material injection part hits the inner periphery of the excavated hole and There is a problem that the excavation by the shield machine cannot be performed smoothly because the material injection part is damaged.
The present invention has been devised in view of the above circumstances, and an object of the present invention is that a shield machine in which a backing material injection portion is attached to the outer peripheral surface of a rear trunk portion proceeds from a soft ground to a hard ground. even if is to provide an advantageous backing write material injection apparatus on the smooth progress of the shield machine.

In order to achieve the above object, the present invention provides a backing material supply unit disposed inside a rear trunk part of a shield having a cutter at a tip, an opening formed through the rear trunk part, and the opening part. Between the injection position that protrudes outward in the radial direction of the rear body portion and enables the injection of the backing material into the tail void, and the storage position that is housed inside the rear body portion from the opening portion and closes the opening portion The first back cover is provided so as to be movable while being in contact with the edge of the opening, and is connected to the back material supply unit when the soft ground is excavated and separated from the back material supply unit when the hard ground is excavated An actuator for moving the material injection part and the first back material injection part to the injection position when the soft ground is excavated and to the storage position when the hard ground is excavated; and the back-in when the hard ground is excavated Softly connected to the material supply unit That is disconnected from the Urakomi material supply portion during excavation of the board and a second Urakomi material injection portion connectable to Urakomi material injection hole of the segment located at a position spaced rearwardly of the rear barrel Features.

Claims (7)

In the rear trunk of the shield machine having a cutter at the tip, an opening that penetrates the rear trunk is formed,
A first backing material injection for carrying out a simultaneous backing material injection method capable of being connected to and separated from the backing material supply portion while arranging a backing material supply portion of the backing material injection device inside the rear trunk portion And a second backing material injection part for carrying out the immediate backing material injection method,
The first backing material injection part is disposed in the opening;
When the shield machine digs a soft ground, the backing material supply unit and the first backing material injection unit are connected, and the first backing material injection unit is connected to an edge of the opening. With the injection position projecting radially outward of the rear trunk portion from the opening in the state of contact, injection of the backing material from the first backing material injection portion to the tail void,
When the shield machine advances to a hard ground, the first back material injection part is accommodated from the opening to the inside of the rear trunk while contacting the edge of the opening, and the first A storage position in which the opening is closed by a backing material injection section, the backing material supply section and the second backing material injection section are connected, and the rear trunk is formed by the second backing material injection section. The backing material was injected into the tail void through the backing material injection hole of the segment located at a position away from the back of the part,
A method for injecting a backing material. The movement of the first backing material injection part between the injection position and the storage position is performed with the shield of the first backing material injection part located on the tip side of the shield machine as a fulcrum. The position of the first back material injection part located on the rear side of the machine is a swing that is displaced in the radial direction of the rear trunk part,
The first backing material injecting portion has an inner surface facing the inside of the rear trunk portion, and an outer surface positioned opposite to the inner surface.
In the injection position, the position of the outer surface located on the front end side of the shield machine is located at the same place in the radial direction of the rear body portion, and gradually increases toward the position located on the rear side of the shield machine. Inclined to displace radially outward of the trunk,
The backing material injecting method according to claim 1. The outer surface is formed of a cylindrical surface having the same diameter as the outer peripheral surface of the rear trunk part,
In the storage position, the outer surface is positioned on the same surface as the outer peripheral surface of the rear body portion.
The method for injecting a backing material according to claim 1 or 2, wherein: A backing material supply section disposed inside the rear trunk of the shield having a cutter at the tip;
An opening formed through the rear body,
An injection position that protrudes radially outward of the rear body from the opening and enables the injection of the backing material into the tail void, and a storage that is housed in the rear body from the opening and closes the opening A first backing material injecting section that is movably provided in contact with the edge of the opening between the positions and separable from the backing material supply section;
An actuator for moving the backing material injection portion to the injection position and the storage position;
A second backing material injection section connectable to and separated from the backing material supply section and connectable to a backing material injection hole of a segment located at a position away from the rear body portion;
A back-filling material injecting device comprising: The backing material supply unit is configured to include piping for supplying the backing material,
The front part of the pipe is detachable with respect to the first backing material injection part and the second backing material injection part,
As for the connection and separation of the first backing material injection section and the second backing material injection section with respect to the backing material supply section, the front part of the pipe is connected to the first backing material injection section and the second backing material. Made by engaging and disengaging from the filler injection part,
The backing material injecting device according to claim 4. The movement of the first backing material injection part between the injection position and the storage position is performed with the shield of the first backing material injection part located on the tip side of the shield machine as a fulcrum. The position of the first back material injection part located on the rear side of the machine is a swing that is displaced in the radial direction of the rear trunk part,
The first backing material injecting portion has an inner surface facing the inside of the rear trunk portion, and an outer surface positioned opposite to the inner surface.
In the injection position, the location of the outer surface located on the front end side of the shield machine is located in the same location in the radial direction of the rear trunk, and gradually toward the location located on the rear side of the shield machine. Inclined to displace radially outward of the rear torso,
The backing material injecting device according to claim 4 or 5. The outer surface is formed of a cylindrical surface having the same diameter as the outer peripheral surface of the rear trunk portion,
In the storage position, the outer surface is located on the same plane as the outer peripheral surface of the rear trunk portion.
The backing material injecting device according to claim 6.

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