JP6524394B2 - How to build a pipe, pipe and digger - Google Patents

Description

  The present invention relates to a method for constructing a pipe, a pipe and a digging machine.

  Conventionally, a shield method and a propulsion method have been widely used for the construction of a pipe tunnel such as a tunnel (Patent Document 1). Among the shielding methods, recently, a small diameter type and a special propulsion method using both the shielding method and the propulsion method have been developed.

The shield construction method is connected to the existing cylindrical pipe ridge segment to construct a pipe ridge while sequentially assembling the segments divided in advance in the rear of the shield construction machine into a cylindrical shape along with the digging in the ground by the digging machine Go.
In addition, the connection between the segments assembled in each tubular shape and the existing pipe rod segment is generally performed by fastening with a bolt and a nut, and the connection end of these two pipe rod segments is a flexible member such as rubber or resin. By connecting via a tubular joint portion formed of the above, it is practiced to make the pipe ridge a seismic resistance structure.
For example, in Patent Document 2, an elastic ring is interposed between opposing end surfaces of the bisected tube bodies by bisecting the two tube bodies in the length direction via a steel ring integrated with the outer peripheral surface, Both ends of the elastic ring are respectively connected to a steel ring, and an extension margin is provided at an intermediate portion in the longitudinal direction of the elastic ring, and an elastic protection ring is attached to the inner peripheral surface of the steel ring. Flexible fume tubes are described. The flexible fume tube is described as protecting the elastic ring by the elastic protection ring and maintaining the water-retaining property over a long period of time because the expansion margin of the elastic ring is not damaged.

However, in Patent Document 2, since the steel ring is integrated with the outer peripheral surface of the concrete portion of the pipe main body, the installation position can not be freely set, and if it is not previously installed in the pipe main body It does not. Therefore, in order to improve the quake resistance of the pipe tube connected to the existing structure such as a shaft or a manhole, it has been difficult to install the steel ring on the pipe tube in the vicinity of the structure.
In addition, since the conventional drilling machine has internal devices such as a cutter and a shield jack, the steel ring must be installed behind the drilling machine, and there is a problem that the distance from the existing structure is large. The

JP, 2013-47444, A JP, 2005-291333, A

  An object of the present invention is to provide an elastic member attached to a joint portion of an outer shell of a boring machine for drilling the ground to a shaft, and for protecting the pipe from external force applied at the time of earthquake or the like. It is an object of the present invention to provide a construction method, a tunnel and a digging machine.

As a result of intensive studies to solve the above problems, the present inventors have found a solution having the following configuration, and have completed the present invention.
(1) A method of constructing a pipe ridge, comprising forming a pipe ridge by sequentially connecting a pipe ridge segment to a rear end while digging in the ground with a digging machine having a cutter attached to the tip, the tip of the digging machine When the head reaches the shaft, the side of the shaft is cut out and the tip of the drilling machine is pushed into the shaft, the cutter and the internal equipment are removed from the drilling machine, and the inner wall of concrete is formed on the inner surface of the shell of the drilling machine To form a pipe joint connected to the shaft, the outer shell of the boring machine is provided with at least one joint capable of separating the front end and the rear end of the outer shell, and A flange is provided extending radially inward from the inner surface of the outer shell on both sides, and an elastic member is attached so as to straddle between the flanges.
(2) The separable joint portion is a fixture which can be broken by a shear force applied from the outside, with the contact portions respectively attached to the front end side end face and the rear end side end face of the outer shell being in contact with each other The method for constructing a pipe ridge according to (1), wherein the two contact portions are joined.
(3) The method of constructing a pipe rod according to (2), wherein the fixture is a resin bolt and a nut screwed to the resin bolt.
(4) The method of constructing a pipe ridge according to (2), wherein the fixture is a shear pin.
(5) An injection port is provided in the flange, and a filler is injected from the injection port into a space surrounded by both the flanges, the elastic member and the outer shell (1) to (4) The method of constructing a duct as described in.
(6) A pipe tube using the shell of a drilling machine connected to a vertical shaft in soil, wherein the shell of the drilling machine has a junction capable of separating the front end portion and the rear end portion of the shell. At least one flange is provided extending radially inward from the inner surface of the outer shell on both sides of the joint, and an elastic member is attached so as to straddle between the two flanges; There is an inner wall of concrete formed on the wall.
(7) The separable joint portion is a fixture which can be broken by a shear force applied from the outside, with abutment portions respectively attached to the front end side end face and the rear end side end face of the outer shell being in contact with each other The pipe rod according to (6), wherein the two contact portions are joined.
(8) The pipe rod according to (7), wherein the attachment is a resin bolt and a nut screwed with the resin bolt.
(9) The pipe rod according to (7), wherein the attachment is a shear pin.
(10) An inlet is provided in the flange, and a filler is injected from the inlet into a space surrounded by both the flange, the elastic member, and the outer shell (6) to (9) The duct described in any one.
(11) A cutter is attached to the front end of the cylindrical outer shell, and at least one joint capable of separating the front end and the rear end of the outer shell is formed on the outer shell, and this joint is Provide flanges extending radially inward from the inner surface of the outer shell on both sides of the outer shell, attach an elastic member so as to straddle the two flanges, and form an inner wall of concrete on the inner surface of the outer shell Features a digger.

  According to the present invention, since the elastic member can be attached to the separable joint on any part of the shell of the excavator left behind in the ground, it is possible to cope with displacement or shear displacement occurring at the time of earthquake, Can be prevented.

(A) is explanatory drawing which shows one Embodiment of a boring machine used for the construction | assembly method of the pipe according to this invention, (b) is explanatory drawing which shows one embodiment of the pipe constructed by (a) And includes a partially enlarged view. (a)-(e) is explanatory drawing which shows one Embodiment of the construction method of a pipe | tube. (f)-(j) is explanatory drawing which shows one Embodiment of the construction method of a pipe | tube. (k)-(n) is explanatory drawing which shows one Embodiment of the construction method of a pipe | tube. (a)-(d) is explanatory drawing which shows the attachment procedure of the elastic member in the junction part of a pipe ridge. (A) is explanatory drawing which shows one Embodiment using a shear pin by the construction method of the pipe ridge which concerns on this invention, (b) is explanatory drawing which shows one embodiment using a cross-sectional square C-shaped member .

  Hereinafter, the present invention will be described in detail based on the drawings. FIG. 1 (a) shows an embodiment of a boring machine according to the present invention.

In FIG. 1 (a), a digging machine 1 is to dig the ground by rotating a cutter 2 attached to the tip, and the rear end of the cutter 2 is covered with a cylindrical outer shell (skin plate) 11. The internal device 20 of the boring machine 1 is accommodated.
In this boring machine 1, a cutter 2 is provided at the tip of the outer shell 11, and a pipe rod segment 7 is assembled at the rear end of the outer shell by an elector (not shown) and sequentially connected to form a pipe rod 10.

The outer shell 11 is a cylindrical member that forms the outer periphery of the excavator 1, and supports the soil in the soil so as not to collapse when the excavator 1 excavates, and protects the internal device 20.
When leaving the boring machine 1 in the ground, the shell 11 sets a mold 12 on the inner surface of the shell 11 as described later, and fills concrete between the shell 11 and the mold 12 (casting) ) To form the inner wall 110, which can be used as a part of the tube 10.

The shell 11 is formed separably at at least one joint 4. The ends of the outer shell 11 can be connected to each other by a plurality of joints 4 so that the overall length of the excavator 1 can be changed according to the application.
The joint portion 4 is connected by fixing the ends of the outer shell 11 with the reinforcing rib 41 while the drilling machine 1 digs the ground, but the drilling machine 1 reaches the shaft 100, which will be described later. When attaching the fixture 5 (or the bolt 52 and the nut 521) to the joint 4, this reinforcing rib 41 is removed.
In addition, the installation location and the installation number of the junction part 4 in the outer shell 11 are arbitrary, and the space | interval of junction part 4 may not be uniform.

As the internal device 20, a cutter motor 3 for rotating the cutter 2, a shield jack 8 for advancing the digging machine 1 with a reaction force for pushing the tubular rod segment 7 assembled in a tubular shape, a curved portion of the tubular rod 10 And a pinch valve, a mud tank, a hydraulic unit and the like.
The internal equipment 20 can be completely removed from and recovered from the boring machine 1, and after the boring machine 1 reaches the shaft 100, when placing the inner wall 110 of concrete on the inner surface of the outer shell 11, from the boring machine 1 Be removed.

The pipe wall segment 7 is composed of a plurality of segments, and after a certain distance has been drilled by the boring machine 1, the segments are assembled into a tubular shape by an elector (not shown) used in a usual shielding method and assembled before drilling. The tube weir 10 is formed by sequentially connecting to the front of the existing tube weir segment 7. A tail seal 13 is attached to the outer peripheral side of the pipe segment 7 in order to prevent the entry of mud and ground water into the boring machine 1. The work of assembling and connecting the pipe segment 7 is performed in the boring machine 1.
Further, the pipe ridge segment 7 is connected to the inner wall 110 formed on the inner surface of the outer shell 11. Therefore, the outer diameter of the tubular rod segment 7 assembled in a tubular shape should be the same as the outer shell 11.
As a segment which comprises the pipe ridge segment 7, the RC type (cement) segment conventionally used, a steel segment, the synthetic segment which combined cement and steel, etc. can be used.

FIG. 1 (b) is an explanatory view showing an embodiment of a pipe stub 10 constructed by the boring machine 1. In the pipe rod 10, a concrete inner wall 110 is formed on the inner surface of the shell 11 of the drilling machine 1, a tip of the inner wall 110 is connected to the shaft 100, and a rear end of the inner wall 110 is tubularly assembled. Connected with 7
A flange 51 extending radially inward from the inner surface of the outer shell 11 is provided on both sides of at least one joint 4 from which the reinforcing rib 41 has been removed, and the pipe ridge 10 straddles between the flanges 51 and 51. An elastic member 55 is attached. In addition, the joint part 4 which does not attach the elastic member 55 may leave the reinforcing rib 41 attached.

The partially enlarged view of FIG. 1 (b) shows the joint 4 to which the flange 51, the elastic member 55 and the like are attached. The details of FIG. 1 (b) are shown in FIG. 5 (d).
The joint portion 4 includes an abutting portion 14 attached to each of the front end side end face and the rear end side end face of the outer shell 11, a fitting 5 for joining and fixing the abutting portion 14, and the outer shell 11. It comprises a flange 51 provided on the inner surface by welding and extending radially inward from the inner surface of the outer shell 11 and an elastic member 55 provided between the flanges 51 and 51. Further, the elastic member 55 is fitted, and a lid member 56 fixed by welding to the flange 51, a bolt 53 passing through both ends of the elastic member 55 from the inner surface side between the flanges 51 and 51, and an inner wall The anchor bolt 54 etc. which are driven into 110 may be provided.

The flange 51 is a member which is provided by welding to the front end side and the rear end side of the inner surface of the outer shell 11 and extends inward in the radial direction of the outer shell 11, and the front end side end face and the rear end side end face of the outer shell 11 And a fixture 5 for joining the contact portion 14.
The flange 51 is provided with an inlet 58, and the filler 57 can be injected into the space surrounded by the flanges 51 and 51, the elastic member 55, and the outer shell 11 from the inlet 58. .

  The fixture 5 can be broken by an externally applied shear force. That is, when an external force exceeding the specified value of the pipe ridge 10 is applied due to an earthquake or the like, the fixture 5 is broken due to the generated stress to cope with the fluid displacement and shear displacement inside the inner wall 110 and breakage of the pipe ridge 10 Can be prevented. Such a fixture 5 may be composed of, for example, a bolt 52 and a nut 521 screwed to the bolt 52. The bolt 52 is preferably selected from, for example, resin, wood, metal and the like as the material, but is preferably a resin bolt in terms of strength, and the nut 521 to be screwed is made of resin or metal It is good to be made.

  Furthermore, as shown in FIG. 6 (a), the fixture 5 may be a shear pin (shear pin) 52 'having a shear portion which is sheared when an external force exceeding a prescribed value is applied. The shear pin 52 'is fixed to the contact portion 14 by providing a shear pin press-in hole 141 or the like for press-fitting one end side of the shear pin 52', and a shear portion 522 such as a neck provided on the shear pin 52 ' The breakage or breakage can prevent breakage of the tube 10.

  Further, the fixture 5 is not limited to a bolt-like member, and as long as it is separated from the joint portion 4 by a shear force applied from the outside, for example, as shown in FIG. It may be a U-shaped cross section member 50 which holds the contact portion 14 from the inner side.

  Further, the filler 57 injected from the injection port 58 provided in the flange 51 into the space surrounded by both the flanges 51 and 51, the elastic member 55 and the outer shell 11 is also solidified after being injected into the space. When a ground movement or the like occurs due to an earthquake or the like, like the fixture 5, the generated stress can cause breakage, thereby preventing damage to the pipe ridge 10. Examples of the filler 57 include mortar and the like.

The elastic member 55 is made of rubber, and has an extension margin 551 which is bent and deformed in a reverse U-shape outward in the middle portion thereof, closely in contact with the lid member 56, and in the soil and the inner wall 110 of the pipe 10 Seal between.
The elastic member 55 is attached so as to extend between the two flanges 51, and both ends thereof are held between the inner surface flange 51 and the outer surface lid member 56, and the bolt 53 contacts the flange 51 and the elastic member 55 from the inner surface of the elastic member 55. The lid member 56 is inserted and fixed by a nut 531. Further, an anchor bolt 54 may be driven into the flange 51 for reinforcement.

  In the elastic member 55, when a ground movement or the like occurs due to an earthquake or the like, the fixture 5 joining the contact portion 14 of the outer shell 11 breaks and the outer shell 11 shifts in the shear direction, or V It deforms in response to external force such as V-shaped or V-shaped. Further, the extension margin portion 551 of the elastic member 55 can follow the extension or elastic deformation in accordance with the above deformation, and the sealability between the ground and the inside of the pipe ridge 10 can be maintained. .

  The lid member 56 is welded and fixed to the flange 51, and holds the elastic member 55 from the inner peripheral side and prevents the corrosion by the fluid flowing in the inside of the pipe rod 10.

  The flange 51, the fixture 5, the elastic member 55 and the like in the joint portion 4 described above may be attached in advance to the shell 11 of the drilling machine 1, for example, either before or after removing the internal device 20 of the drilling machine 1. Installation is possible.

The structure of the joint portion 4 is provided by removing the reinforcing rib 41 of the joint portion 4 of the outer shell 11, and the outer shell 11 is used only by removing the cutter 2 and the internal device 20 from the drilling machine 1 As it can, it can be arranged near the shaft 100 without considering the length of the drilling machine 1. Therefore, breakage of the connection between the shaft 100 and the pipe 10 can be prevented.
Further, by providing such joint portions 4 at a plurality of locations of the outer shell 11, breakage of the pipe rod 10 can be largely prevented.

The construction method of the vessel 10 is demonstrated using FIGS. 2-4.
First, as shown in FIG. 2 (a), the ground is drilled with the boring machine 1, and the cutter 2 at the tip of the boring machine 1 is made to reach the side surface of the shaft 100. At this time, at the rear end of the drilling machine 1, a pipe body in which the pipe segments 7 divided in advance are sequentially connected to the existing pipe segment is formed.

  Next, as shown in FIG. 2 (b), the side of the shaft 100 is cut out, and the tip of the drilling machine 1 is pushed into the shaft 100. In addition, you may perform the operation | work which cuts out the side of the shaft 100 by the operation | work normally called mirror cutting.

  Next, as shown in FIG. 2 (c), the cutter 2 of the digging machine 1 pushed out is disassembled and removed on the side of the shaft 100.

  Next, as shown in FIGS. 2 (d) and 2 (e), the digging machine 1 is further pushed out to the shaft 100, and then the internal device 20 excluding the cutter motor 3 of the digging machine 1 is removed.

  Next, as shown in FIG. 3F, the outer shell 11 is cut at a position where the outer shell 11 of the drilling machine 1 and the shaft 100 are connected, and the cutter motor 3 is removed.

  Next, as shown in FIG. 3 (g), the reinforcing rib 41 connecting the end portions of the outer shell 11 at the joint portion 4 is cut and removed.

  Next, as shown in FIG. 3 (h), the front end side end face and the rear end side end face of the outer shell 11 from which the reinforcing rib 41 is removed are brought into contact with each other and fixed by the fixture 5. Furthermore, as described later, flanges 51 extending radially inward from the inner surface of the outer shell 11 are welded and attached to the inner surface of the outer shell 11 on both sides of the joint portion 4 so as to straddle between the two flanges 51 and 51 Attach the member 55. At an intermediate portion of the elastic member 55, an extension margin portion 551 which is bent and deformed in a reverse U-shape in the direction of the outer shell 11 is provided.

  Next, as shown in FIG. 3I, the space between the flanges 51 of the joint 4 is filled with a filler 57 such as mortar.

  Next, as shown in FIG. 3 (j), after reinforcing bars 121 are welded in the outer shell 11, as shown in FIG. 4 (k), using the reinforcing bars 121, a cylindrical mold is formed in the outer shell 11. Install the frame 12.

  Next, as shown in FIG. 4 (l), after the support 122 is attached in the mold 12, as shown in FIG. 4 (m), concrete is filled in the gap between the outer shell 11 and the mold 12 Fill to form the inner wall 110.

  Finally, as shown in FIG. 4 (n), when the formwork 12 and the support 122 are removed, the pipe rod 10 having the outer shell 11 of the excavator 1 on the outer wall surface is completed.

  FIGS. 5 (a) to 5 (d) show an embodiment of the procedure for attaching the flange 51 and the elastic member 55 to the joint portion 4, and the pipe wedge described in FIGS. 3 (h) and 3 (i). The details of how to build

First, as shown in FIG. 5A, in the joint portion 4, the contact portion 14 from which the reinforcing rib 41 has been removed is inserted with a bolt 52, and the nut 521 is screwed and fixed. The flanges 51 are welded and attached to the inner surface of the shell 11 on both sides of the frame. The flange 51 is a member extending radially inward from the inner surface of the outer shell 11, and a bolt 53 projecting outward from the contact portion 14 is welded in advance. Further, the flange 51 is provided with at least one inlet 58.
The bolt 52 may be breakable by an externally applied shear force.

Next, as shown in FIG. 5 (b), an elastic member 55 made of rubber is attached so as to straddle between the flanges 51 and 51. The elastic member 55 has an extension margin 551 bent and deformed in a reverse U shape in the direction of the shell 11 in the middle portion, and the bolt 53 in which both ends of the elastic member 55 protrude outward of the flanges 51 and 51 It is inserted and fixed. Further, the extension allowance portion 551 is disposed in the middle between the flanges 51 and 51 and has a space between the outer shell 11 and the contact portion 14.
Further, the elastic member 55 not only protects the pipe ridge 10 but also expands or elastically deforms in response to an external force applied when a ground movement or the like occurs due to an earthquake or the like, and seals the filler 57 described later. May be included.

Next, as shown in FIG. 5C, the lid member 56 is fitted from below the elastic member 55, fixed by a nut 531 screwed with the bolt 53, and the lid member 56 and the flange 51 are welded. Fix it.
Further, the anchor bolt 53 may be driven into the lid member 56 from the outside of the flange 51.

  Finally, as shown in FIG. 5D, the filler 57 such as mortar is surrounded by the elastic member 55 and the outer shell 11 between the flanges 51 and 51 through the inlet 58 provided in the flange 51. Once the space is poured and hardened, the work of attaching the flange 51 and the elastic member 55 to the joint 4 is completed. After this, the vessel 10 may be constructed according to the procedure from FIG. 3 (j) described above.

  As described above, when a ground movement such as an earthquake occurs and a shearing force is applied from the outside, the bolt 52 inserted through the contact portion 14 of the outer shell 11 is broken or detached, thereby causing the pipe ridge 10 Can be protected. In addition, also in the case where the hardened filler 57 is broken, the pipe crucible 10 can be similarly protected.

  As described with reference to FIGS. 3H and 3I, in the flange 51 and the elastic member 55 at the joint portion 4, the digging machine 1 that has dug in the ground reaches the shaft 100, and the inside of the digging machine 1 It may be provided after removing the device 20, or may be provided in advance on the outer shell 11 in the drilling machine 1.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the above embodiment, A various change, improvement, and improvement are possible within the range as described in a claim.

DESCRIPTION OF SYMBOLS 1 Excavation machine 2 Cutter 3 Cutter motor 4 Joint 5 Attachment 7 Tubular segment 8 Shield jack 9 Middle fold jack 10 Tubing 11 Outer shell 12 Frame 13 Tail seal 14 Contacting portion 20 Internal equipment 41 Reinforcing rib 51 Flange 52 Bolt 521 Nut 52 'Shear pin 141 Shear pin press-in hole 522 Shearing portion 53 Bolt 531 Nut 54 Anchor bolt 55 Elastic member 551 Stretching margin portion 56 Lid member 57 Filling material 58 Inlet 110 Inner wall

Claims (11)

It is a construction method of the pipe ridge which forms a pipe ridge by connecting a pipe ridge segment in order at the rear end while digging in the ground with a digging machine attached with a cutter at the tip,
When the tip of the drilling machine reaches the shaft, the side of the shaft is cut out and the tip of the drilling machine is pushed into the shaft,
Remove the cutter and internal equipment from the machine
In forming the inner wall of concrete on the inner surface of the shell of the drilling machine to form a pipe weir connected to the shaft,
The shell of the excavator is formed with at least one joint capable of separating the leading end and the rear end of the shell, and the both sides of the joint extend radially inward from the inner surface of the shell. A flange is provided, and an elastic member is attached so as to straddle between the flanges, and a lid member is attached which holds the both ends of the elastic member by fitting between both the flanges. .   In the separable joint portion, the abutting portions respectively attached to the front end side end face and the rear end side end face of the outer shell abut each other, and the both abutments are performed by the attachment which can be broken by the shear force applied from the outside. The method according to claim 1, wherein the junctions are joined.   The method for constructing a pipe rod according to claim 2, wherein the fixture is a resin bolt and a nut screwed to the resin bolt.   The method according to claim 2, wherein the fixture is a shear pin.   The pipe rod according to any one of claims 1 to 4, wherein the flange is provided with an inlet, and a filler is injected from the inlet into a space surrounded by both the flange, the elastic member and the outer shell. How to build It is a pipe using a shell of a drilling machine connected to a shaft in the soil,
At least one joint capable of separating the front end and the rear end of the outer shell is formed in the outer shell of the boring machine, and radially inward from the inner surface of the outer shell on both sides of the joint. And an elastic member attached so as to straddle between the two flanges, a lid member for holding the both ends of the elastic member by fitting between the two flanges, and attaching a lid member to the inner surface of the outer shell Is a pipe wall characterized in that the inner wall of concrete is formed.   In the separable joint portion, the abutting portions respectively attached to the front end side end face and the rear end side end face of the outer shell abut each other, and the both abutments are performed by the attachment which can be broken by the shear force applied from the outside. The pipe rod according to claim 6, which joins the contact portions.   8. The pipe rod according to claim 7, wherein the fixture is a resin bolt and a nut screwed to the resin bolt.   8. The pipe rod according to claim 7, wherein the attachment is a shear pin.   The filler according to any one of claims 6 to 9, wherein the flange is provided with an inlet, and a filler is injected from the inlet into a space surrounded by both the flange, the elastic member and the outer shell. A moxibustion. A cutter is attached to the front end of the cylindrical outer shell, and at least one joint capable of separating the front end and the rear end of the outer shell is formed on the outer shell, and on both sides of this joint Providing a flange extending radially inward from the inner surface of the outer shell, attaching an elastic member so as to straddle between the two flanges, and fitting a lid member for holding the both ends of the elastic member between the two flanges A digging machine characterized in that an inner wall of concrete is formed on the inner surface of the outer shell of the attachment and other parts.

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