JP4414585B2 - Promotion method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a propulsion construction in which a propelling pipe having a leading conductor disposed inside is propelled to a natural ground and then the leading conductor is pulled back through the propulsion pipe. To the law It is related.
[0002]
[Prior art]
When laying sewer pipes and other pipes in the ground, it is common to employ a propulsion method that propels the pipes to be propelled following the leading conductor of an excavator or the like. In this method, a start shaft and an arrival shaft are constructed on the planned laying line of the pipeline to be laid, and the thrust applied to the pipe by the main pushing device installed in the start shaft is transmitted to the excavator through the pipe. To promote. Then, when the excavator arrives at the arrival shaft, a pipeline composed of continuous pipes is laid between the departure shaft and the arrival shaft.
[0003]
On the other hand, recently, a leading conductor is arranged inside the pipe to be propelled and propelled from the start shaft, and when the laying length of the pipe to be propelled reaches a target length, the leading conductor is started through the pipe. By pulling back to the vertical shaft, a construction method may be employed in which the pipe is left in the ground and laid. This construction method eliminates the need for an arrival shaft when laying pipes, so when constructing pipe roofs that are used to lay pipes that may have a significant impact on traffic conditions or to construct tunnels on the bank, It's being used.
[0004]
In the method of pulling back the tip conductor, the tip conductor is configured to have a diameter smaller than the inner diameter of the tube so that it can easily pass through the inside of the tube. The pipe and the tip conductor are integrally connected via a mechanical joint. When thrust is applied to the rear end of the pipe, the thrust is transmitted from the joint to the tip conductor, thereby connecting the tip conductor and the pipe. Promoting at the same time. Also, when pulling back the leading conductor, an operator enters the propelled pipe and cuts the joint so that the connection between the leading conductor and the pipe is released, and then the wire attached to the trailing end of the leading conductor It is pulled back to the starting shaft using PC bar.
[0005]
In the method of pulling the leading conductor back to the starting shaft as described above, an arrival shaft is unnecessary, the construction period required for construction of the arrival shaft, etc. can be shortened, and a pipe line that does not require an arrival shaft like the well operation It is advantageous when laying.
[0006]
[Problems to be solved by the invention]
As described above, after laying a pipe line in the ground, the method of pulling the leading conductor through the inside of the pipe has various advantages, and it is considered that it will become increasingly popular in the future. However, it is not without problems.
[0007]
For example, when pulling back the leading conductor, it is essential to release the connection between the leading conductor and the pipe, and an operator needs to enter the laid pipe. However, in order for a worker to enter the inside of the pipe, the diameter of the pipe needs to be 800 mm or more regardless of the specification of the target pipe line. That is, in the case of a pipe having a diameter of less than 800 mm, a worker is prohibited from entering by a law, and a pipe diameter of 800 mm or more is required to perform the above-described work. For this reason, depending on the case, there is a problem that a pipe that is thicker than necessary has to be laid and the cost increases.
[0008]
In order to solve the above problem, it is possible to connect and release the leading conductor and the tube by a mechanically controlled means that is remotely controlled. When released, there must be no protrusions or the like that obstruct the pulling back of the leading conductor, which causes a problem that the mechanism becomes complicated and the cost increases.
[0009]
In the case of constructing a pipe roof, when a steel pipe is used as the propulsion pipe, the connection of the propulsion pipe is performed by welding, so that the continuous steel pipes are integrated with each other to function as a rigid body and cannot exhibit flexibility. For this reason, it becomes easy to generate | occur | produce with a natural mountain during propulsion, and propulsion resistance increases in many cases. In such a case, the moment the scouring is released during propulsion, the propulsion speed increases rapidly, and the excavator exerts excessive thrust on the face, causing a problem that a load exceeding the rotational capacity of the cutter head acts. As a result, a problem arises that the face pressure is significantly increased and smooth excavation cannot be performed. Furthermore, since the phenomenon occurs intermittently, a problem arises that smooth propulsion becomes impossible. Such a phenomenon is particularly remarkable when the natural ground is a rock formation.
[0010]
An object of the present invention is to provide a propulsion method capable of transmitting a thrust to a leading conductor with a simple structure without any particular increase in cost, and capable of being easily pulled back, and a propulsion for realizing the propulsion method. To provide an apparatus.
[0011]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the propulsion method according to the present invention is to place a new conductor in the propelled pipe after arranging the leading conductor inside the propelling pipe and propelling the propelling pipe and the leading conductor to the ground. Next, a transmission member having a strength capable of transmitting a thrust corresponding to the length of the propulsion pipe and the thrust applied to the leading conductor is made to follow the leading conductor, and then thrust is applied to the new propelling pipe and the transmission member. When the propulsion length of the propulsion pipe reaches a predetermined value by repeating the propulsion, pull the transmission member and the lead conductor back through the propelled propulsion pipe. The propulsion pipe is buried in the natural ground.
[0012]
In the above propulsion method, the propelling pipe and the leading conductor can be propelled without being integrated, and the leading conductor can be pulled back through the propulsion pipe. That is, after arranging the leading conductor inside the propelling pipe and propelling them, the propulsion pipe is followed by a new propelling pipe, and the length and thrust corresponding to the new propelling pipe are transmitted to the leading conductor. By connecting the transmission member having the strength to be obtained, the thrust applied to the leading conductor can be transmitted from the transmission member, and the thrust applied to the propulsion tube can be applied from the subsequent propulsion tube.
[0013]
Accordingly, the propulsion pipe disposed at the head and the leading conductor disposed inside the propulsion pipe are each followed by an independent propulsion pipe and a transmission member, and thrust is applied through the propulsion pipe and the transmission member. Thus, the propelling pipe and the leading conductor can be simultaneously propelled. After the target propulsion is completed, when the transmission member is pulled back to the start shaft, the leading conductor can be pulled back accordingly.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
The above Promotion method The preferred embodiment will be described with reference to the drawings.
[0015]
In the propulsion method according to the present invention, an excavator as a leading conductor is arranged inside the propulsion pipe located at the head without being integrated with the propulsion pipe, and these propulsion pipes and the rear end side of the excavator are arranged. After propulsion and propulsion from the starting pit toward the target direction, a new propulsion pipe is connected to the rear end of the propulsion pipe, and a transmission member that transmits the thrust is connected to the rear end of the excavator and new propulsion is performed. When the thrust is applied to the pipe and the transmission member at the same time, the propulsion pipe, the excavator and the transmission member are propelled independently from each other. When the propulsion length of the propulsion pipe reaches the target length By pulling the transmission member back to the starting pit, the excavator and the transmission member following the excavator are pulled back, and the propelling pipe is left in the ground to lay the pipeline.
[0016]
The leading conductor is not limited to the excavator for excavating the natural ground, but is configured to be able to propel the propelling pipe by consolidating the natural ground according to the thrust applied through the transmission member, It is possible to selectively use a structure that can excavate a natural ground with high-pressure water jetted from the ground.
[0017]
The propulsion pipe located at the head and the excavator disposed inside the propulsion pipe are not integrated so as to be able to transmit force to each other. For propulsion, a continuous propulsion pipe and a transmission member connected to the excavator Thrust is simultaneously applied from mutually independent paths. For this reason, when pulling back the excavator, it is possible to pull the transmission member and the excavator back to the start shaft through the inside of the propulsion pipe by applying a pulling force to the transmission member.
[0018]
When propelling a new propulsion pipe following the propulsion pipe and at the same time propelling a transmission member following the excavator, the push ring attached to the main pusher installed at the starting pit is transmitted to the rear end of the new propulsion pipe. It is preferable that the configuration is such that thrust can be applied by simultaneously abutting against the rear end of the member. For this reason, the length of the propulsion tube and the length of the transmission member are formed to be equal to each other.
[0019]
Therefore, every time one propulsion pipe is propelled, one transmission member is also propelled, and a new propulsion pipe and a new transmission member are connected to the rear ends of the propulsion pipes for repeated propulsion. Can be promoted to a length of
[0020]
As the propulsion pipe, a pipe such as a fume pipe or a steel pipe can be selectively used. For example, when constructing only a start shaft and laying a sewer pipe, after a certain length of propulsion using a fume pipe as a propulsion pipe, pulling back the excavator placed inside will have a significant impact on ground traffic. Sewer pipes can be laid without giving. Moreover, a pipe roof can be constructed using a steel pipe as a propulsion pipe.
[0021]
The excavator excavates the face in pressure contact with the natural ground according to the thrust transmitted through the transmission member. For this reason, the transmission member needs to have a sufficiently high strength with respect to the thrust to be transmitted. As such a transmission member, a steel pipe or a steel pipe formed by processing a steel pipe into an arc shape and mounting a wiring such as a cap tire or a hydraulic hose and piping on the center side of the arc, etc. Can be used.
[0022]
The earth and sand excavated by the face is discharged to the ground through the inside of the excavator. As such a mechanism, there is a mechanism in which a conveyor having an auger is arranged from a tip portion of the excavator to an in-machine portion, and there is also a mechanism in which a steel pipe provided with an auger is arranged instead of the conveyor. In this excavator, the earth and sand excavated by driving the auger is taken into the excavator and can be discharged by a steel pipe provided with a conveyor or auger provided through the excavator and the propelling pipe. . In the muddy water method, muddy water is supplied to the face, and the excavated sediment is discharged together with the muddy water.
[0023]
In the excavator configured as described above, a conveyor or a discharge pipe for discharging excavated sediment is generally configured using a steel pipe, and each of these steel pipes is provided with one propulsion pipe. A new steel pipe is connected. Therefore, it is possible to use a steel pipe for discharging the excavated earth and sand as a transmission member.
[0024]
Hereinafter, specific examples will be described with reference to the drawings. FIG. 1 is a diagram for explaining a state in which an excavator serving as a leading conductor is disposed inside a leading propulsion pipe. FIG. 2 is a diagram illustrating a state where the transmission member is made to follow the excavator. FIG. 3 is a diagram illustrating the configuration of the transmission member. 4 is a view for explaining the configuration of the transmission member, and is a cross-sectional view taken along the line IV-IV in FIG. FIG. 5 is a view for explaining the configuration of the transmission member, and is a cross-sectional view taken along the line VV of FIG. FIG. 6 is a diagram for explaining the configuration and procedure for carrying out the propulsion method, and is a diagram for explaining the start shaft.
[0025]
The propulsion device shown in the figure is configured by arranging a digging machine B adopting a muddy construction method inside a leading propulsion pipe A, and with a new propulsion pipe 1 following the rear end of the leading propulsion pipe A. The transmission member C is made to follow the rear end of the excavator B, and thrust is simultaneously applied to the new propulsion pipe 1 and the transmission member C, so that the leading propulsion pipe A, the propulsion pipe 1 and the excavator B, the transmission member C Can be promoted.
[0026]
Leading propulsion pipe A, propulsion pipe 1 (Hereinafter, for the sake of simplicity, A is a propulsion pipe disposed at the head, and 1 is a propulsion pipe following the propulsion pipe A. ) Selects a pipe having the optimum material, length and thickness for a target pipe line from pipes such as a steel pipe, a fume pipe or a synthetic resin pipe. When propelling the propulsion pipes A and 1, the propulsion direction may deviate from the planned laying line. When it is determined that the propulsion direction has deviated during propulsion, the excavator B is refracted as described later and the planned laying line The direction is controlled so as to return to.
[0027]
For this reason, the propulsion pipe A is configured to be able to be refracted according to the refraction of the excavator B. That is, the leading propulsion pipe A is composed of the leading pipe 1a and the main body pipe 1b, and is configured so that it can be bent by being fitted to each other in the fitting portion 1c provided at a position facing the bending portion of the excavator B. Has been.
[0028]
A support portion 1d that contacts the outer periphery of the shield body 3 of the excavator B is provided on the inner surface of the leading pipe 1a, and a support portion 1d that contacts the outer periphery of the tail shield 4 is provided on the inner surface of the main body pipe 1b. Yes. Therefore, the leading pipe 1a, the main body pipe 1b of the propulsion pipe A and the shield main body 3 of the excavator B and the tail shield 4 are in contact with each other via the support member 1d, and the force when refracting the excavator B is the respective contact portion. To the propulsion pipe A.
[0029]
The excavator B shown in the present embodiment is configured to be able to excavate a natural ground mainly composed of a rock layer, and among the plurality of roller cutters provided in the cutter head 2, the roller cutter provided in the outermost peripheral portion is It is configured so that a natural ground can be excavated with a diameter larger than the outer diameter of the propelling pipe A.
[0030]
The excavator B has a cutter head 2 disposed at the head, a shield body 3 that rotatably supports the cutter head 2, and a tail shield 4 that is refractably connected to the shield body 3 via a jack 5. Configured. The front end surface of the cutter head 2 is disposed so as to protrude from the front end portion of the propelling tube A, and the outer peripheral surface of the shield body 3 and the tail shield 4 is supported by being in contact with the support portion 1d provided on the inner surface of the propelling tube A. Yes.
[0031]
Therefore, when the outer diameter of the shield body 3 and the tail shield 4 is formed with a dimension sufficiently smaller than the inner diameter of the propulsion pipes A and 1, and the excavator B is supported by the support portion 1d of the propulsion pipe A, The shaft center 3a of the shield body 3 and the shaft center 4a of the tail shield 4 are configured so as to coincide with the shaft center of the propulsion pipe A.
[0032]
The shield body 3 is divided into a soil cutting chamber 3c and an in-machine chamber 3d by a partition wall 3b. A shaft of the cutter head 2 is supported on the partition wall 3b, and a driving device 3e including an electric motor, a speed reducer, and a transmission for driving the cutter head 2 is attached to the inner chamber 3d side. A support wall 3f is provided at a position separated from the partition wall 3b on the side of the cabin 3d by a predetermined distance, and one end of the jack 5 is fixed to the support wall 3f.
[0033]
A cutting chamber 3c is formed on the tip side of the partition wall 3b of the shield body 3. The earth cutting chamber 3c is formed by the peripheral wall on the tip side of the shield body 3 and the inner peripheral surface of the support member 1d provided on the leading pipe 1a of the propulsion pipe A, and the diameter on the side close to the partition wall 3b is small. It is formed in a tapered shape whose diameter increases as it approaches the cutter head 2.
[0034]
The tail shield 4 has a cabin 3d formed therein. In this in-machine chamber 3d, a mud pipe 4b for supplying muddy water having a pressure corresponding to the groundwater pressure and adjusted to a specific gravity capable of mixing and transporting excavated earth and sand to the earth cutting chamber 3c in advance is provided. A pipe 4c is arranged and connected via a water stop bypass valve 4d. By connecting through the water stop bypass valve 4d, when one propulsion pipe 1 is propelled, when connecting a new propulsion pipe 1 and transmission member C, the mud feed pipe 4b and the mud discharge pipe 4c are connected. When it does, it is comprised so that the muddy water in a face can be prevented from flowing backward.
[0035]
Further, in the cabin 3d, an optical system 4e for detecting the propulsion direction when the propulsion pipe A and the excavator B are propelled is provided.
[0036]
The cutter head 2 is driven concentrically or eccentrically by being driven by the driving device 3e, and excavates a natural ground simultaneously with this rotation by the applied thrust. Whether the cutter head 2 rotates concentrically or eccentrically is not limited. In the present embodiment, the cutter head 2 is configured to be able to rotate eccentrically with a predetermined amount of eccentricity with respect to the shaft center 3a of the shield body 3. Yes.
[0037]
The cutter head 2 includes a plurality of roller cutters 2a and a scraper 2b, and a cone rotor 2c that crushes excavated gravel. The cone rotor 2c is a partition wall of the shield body 3 3b The taper is formed in a taper shape in which the diameter on the side approaching is large and the diameter decreases as the tip approaches. The cone rotor 2c is mounted so as to be freely rotatable with respect to the axis of the cutter head 2. When gravel is sandwiched between the inner periphery of the shield body 3, the cone rotor 2c rotates independently of the rotation of the cutter head 2. It is configured to crush gravel.
[0038]
When the excavator B is arranged inside the propulsion pipe A as described above, when the thrust is applied to the propulsion pipe A, the propulsion pipe A moves forward together with the excavator B. Further, when thrust is applied to the excavator B (when the friction between the support portion 1d formed on the propulsion pipe A and the outer peripheral surface of the excavator B is ignored), the excavator B advances alone and is pulled back to the excavator B. When force is applied, the excavator B is pulled back alone.
[0039]
The transmission member C is connected to the rear end of the excavator B and transmits thrust to the excavator B, and is sufficiently smaller than the inner diameter of the propulsion pipe 1 following the propulsion pipe A and should be transmitted. It is comprised so that sufficiently high intensity | strength can be exhibited with respect to thrust. The transmission member C includes a C-shaped main body 10 having an open portion 10 a formed in the longitudinal direction, a shelf 11 provided corresponding to the open portion 10 a of the main body 10, and end plates 12 fixed to both ends of the main body 10. , 13.
[0040]
The main body 10 uses a steel pipe, and is formed in a C shape by cutting a part of the peripheral wall of the steel pipe in a longitudinal direction corresponding to the dimension of the open portion 10a. However, the use of a steel pipe as a material is not limited, and the steel plate may be bent in a C shape or a U shape, and the main body 10 has a length after the end plates 12 and 13 are fixed. It is configured to be substantially equal to the length of 1.
[0041]
The shelf 11 is configured by a groove-shaped member provided in the longitudinal direction of the main body 10, and is attached to a support piece 11a provided along the edge of the open portion 10a of the main body 10 by screws 11b. The shelf 11 may be anything that can support electric wires such as cap tire cords, hoses such as hydraulic hoses, or pipes. Also, the number of shelves 11 is not limited, and can be appropriately formed such as one or two.
[0042]
The end plates 12 and 13 are formed of steel plates having the same shape. The end plates 12 and 13 are U-shaped corresponding to the open portion 10a of the main body 10 and having a width dimension substantially equal to the shelf 11 and a dimension deeper than the position of the shelf 11. Groove 13a Further, a connecting portion 14 is formed at a position facing each other.
[0043]
The connecting portion 14 is configured by a bolt hole (buck hole, not shown) formed in one end plate 12, and a screw 14a or a bolt hole (not shown) formed in the other end plate 13. Then, a collar is fitted in the bolt hole of the end plate 12 with a gap between them, and the bolt 14b is inserted into this collar and screwed into a screw 14a formed on the end plate 13, so that the bolt 14b. The transmission members C can be connected to each other via
[0044]
In particular, since the bolt 14b is inserted through the bolt hole with play, when the propulsion direction of the propulsion pipe 1 is bent, the plurality of connected transmission members C can be bent according to the bend. It is.
[0045]
A plurality of sliding plates 15 are attached to the outer peripheral surface of the main body 10 at predetermined intervals in the longitudinal direction and the circumferential direction. The sliding plates 15 are in contact with the inner surface of the propelling tube 1 and slide. Thus, when the transmission member C and the excavator B are pulled back through the inside of the propulsion pipe 1, friction can be reduced and the sliding can be smoothly performed.
[0046]
Next, a procedure for propelling the propulsion pipes A and 1 using the propulsion apparatus configured as described above and pulling back the transmission member C and the excavator B through the propulsion pipe 1 will be described with reference to FIG. The example shown in the figure is for the purpose of constructing a pipe roof in the natural ground by propelling the propulsion pipes A, 1 and the excavator B, the transmission member C by the main pushing device D installed in the start pit E.
[0047]
In the figure, a starting pusher D is installed in the starting pit E, and a jack 22 is driven by placing a propulsion pipe A in which an excavator B is placed on a guide rail 21 of the starting pusher D. In this way, thrust can be applied to the propulsion pipe A and the excavator B from the push ring 23 by advancing the push ring 23 simultaneously with the rear end of the propulsion pipe A and the rear end of the excavator B. It is configured as follows.
[0048]
At a predetermined position of the starting pit E, mud is supplied through the mud pipe 4b, and the mud discharged through the mud pipe 4c is received, the excavated soil mixed with the mud is separated, and the specific gravity and viscosity are set. The muddy water supply device 24 to be adjusted and the control device of the excavator B are electrically connected, and the propulsion direction of the excavator B is monitored by the devices arranged in the excavator B and the optical system 4e. An operation panel 25 for controlling the propulsion direction by driving the jack 5 or controlling the driving of the muddy water supply device 24 is installed when it deviates from the planned laying line.
[0049]
First, the propulsion pipe A having the excavator B disposed therein is placed on the guide rail 21, the jack 22 is driven to advance the push wheel, and the cutter head 2 of the excavator B is pressed against the ground to be excavated. . When the cutter head is rotated, the natural ground is excavated by the thrust transmitted to the cutter head 2 via the excavator B, and the excavator B and the propelling pipe A are propelled.
[0050]
When the propulsion of the propulsion pipe A and the excavator B is completed, the main pusher D is operated to pull the push ring 23 back, and the transmission member C, the mud feed pipe 4b, and the exhaust mud pipe 4c are inserted into the guide rail 21. The propulsion tube 1 is placed. At this time, the propulsion pipe 1, the transmission member C, and the pipes 4b and 4c all have substantially the same length. The propulsion pipe 1, the transmission member C, and the pipes 4b and 4c are placed on the guide rail 21 and connected to the propulsion pipe A, the excavator B, and the pipes 4b and 4c that have already been propelled.
[0051]
The connection between the propelling pipe A and the propelling pipe 1 is set in advance according to the specifications of the pipe to be used. For example, when a fume pipe is used, a color ring is previously attached to the rear end of the propulsion pipe A, and the front end of the propulsion pipe 1 is fitted to the color ring. In the case of using a steel pipe, it is connected by using the coloring as described above, or by welding the rear end of the propulsion pipe A and the front end of the propulsion pipe 1.
[0052]
When connecting the transmission member C to the excavator B, an end plate 6 similar to the end plates 12 and 13 of the transmission member C is fixed to the rear end portion of the tail shield 4 of the excavator B, and the end plate 6 is attached to the end plate 6. The end plate 12 of the transmission member C can be brought into contact with each other and connected using the bolt 14b.
[0053]
When the mud pipe 4b and the mud pipe 4c are connected to the mud pipe 4b and the mud pipe 4c arranged in the excavator B, they are generally connected via flange joints. The ends of 4b and 4c are socket-type fitting systems, and new pipes 4b and 4c are configured to be connected by being inserted into the ends of the already driven pipes 4b and 4c.
[0054]
The propulsion pipe 1 is connected to the propulsion pipe A already propelled as described above, the transmission member C is connected to the excavator B, and new pipes 4b and 4c are connected to the pipes 4b and 4c. After connecting the wires and pipes, the jack 22 is driven to advance the push wheel 23, thereby propelling the propulsion pipes A and 1, the excavator B, and the transmission member C.
[0055]
When the propulsion length of the propulsion pipes A and 1 is extended by repeating the above operation until the preset propulsion length is reached (in the case of a pipe roof, when the propulsion pipe A reaches the slope on the opposite side) The propulsion of the propulsion pipe 1 is stopped.
[0056]
After that, when the push wheel 23 of the main pushing device D is connected to the most rearward transmission member C and the jack 22 is reduced to retract the push wheel 23, a plurality of transmission members connected to each other along with this retraction. C and excavator B are pulled back to start pit E. At this time, the pulling force does not act on the propulsion pipes A, 1 and therefore remains in the ground.
[0057]
When pulling back of one transmission member C is completed, the connection between the transmission member C placed on the guide rail 21 and the transmission member C in the ground is released, and the transmission member C on the guide rail 21 is moved to the start shaft. In addition, the pipes 4b and 4c are also disconnected from the start pit E.
[0058]
The excavator B is finally pulled back to the guide rail 21 by repeating the pull-back operation. Then, by removing the retracted excavator B from the start pit E, a pipeline composed of continuous propelling pipes A and 1 is laid in the ground. Accordingly, a series of operations including the propulsion of the propulsion pipes A and 1 and the return of the transmission member C and the excavator B is completed.
[0059]
When the propulsion pipe A, 1 is a steel pipe and the natural ground is a rock layer, seri is formed between the propulsion pipe A, 1 and the natural ground, and this seri is released instantaneously and advances rapidly. Even in such a case, since the excavator B is slidable with respect to the propulsion pipe A, it is possible to continue a substantially steady operation regardless of the discontinuous movement of the propulsion pipes A and 1. It is possible to avoid the sudden approach expected to the front face of the excavator B and the increase of the face pressure.
[0060]
【The invention's effect】
As explained in detail above, in the propulsion method according to the present invention, thrust is simultaneously applied to both the propulsion pipe laid in the ground and the leading conductor arranged inside the propulsion pipe arranged at the head. Can be promoted at the same time. For this reason, when pulling back the excavator, the transmission member and the excavator can be pulled back by pulling back the transmission member regardless of the propelled propulsion pipe.
[0061]
Thus, when pulling back the excavator, an operation for cutting the member integrating the propelling pipe and the excavator is not required. That is, it is not necessary for an operator to enter the propulsion pipe. For this reason, even if the diameter of the propulsion pipe is small and workers are prohibited from entering, it is possible to easily cope with it, and use a propulsion pipe with a diameter larger than necessary. The cost can be reduced.
[0062]
In particular, when the propulsion pipe is a steel pipe and this steel pipe is welded and propelled, and when the ground is a rock layer, the occurrence of seri and the occurrence of seri between the propulsion pipe and the ground The speed change accompanying the release can be applied only to the propulsion pipe. In other words, since the excavator can slide inside the propulsion pipe, the excavator can be smoothly propelled without being affected by the seri acting on the propulsion pipe and the release of the seri.
[0063]
In addition, by providing a shelf on the transmission member, it is possible to keep the wires such as the wires, hoses, and piping connected to the leading conductors in order. For this reason, an orderly work environment can be realized.
[0064]
In addition, when the leading conductor is an excavator that discharges excavated sediment by muddy water, an excavator that takes excavated sediment into the machine by an auger and discharges it by a conveyor, or both the intake and discharge by an auger. In the case of a simple excavator, the propulsion work can be rationally advanced by using the discharge pipe for discharging the excavated earth and sand as a transmission member.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating a state in which an excavator serving as a leading conductor is disposed inside a leading propulsion pipe.
FIG. 2 is a diagram illustrating a state in which a transmission member is made to follow an excavator.
FIG. 3 is a diagram illustrating a configuration of a transmission member.
4 is a diagram for explaining a configuration of a transmission member, and is a cross-sectional view taken along the line IV-IV in FIG. 3;
5 is a diagram for explaining a configuration of a transmission member, and is a VV cross-sectional view of FIG. 3; FIG.
FIG. 6 is a diagram for explaining the configuration and procedure when carrying out the propulsion method, and is an explanatory diagram of a start shaft.
[Explanation of symbols]
A propulsion pipe
B digging machine
C Transmission member
D original pusher
E Starting pit
1 Promotion pipe
1a Top pipe
1b Body pipe
1c Fitting part
1d Support member
2 Cutter head
2a Roller cutter
2b scraper
2c cone rotor
3 Shield body
3a, 4a axis
3b Bulkhead
3c cutting room
3d cabin
3e Drive unit
3f Support wall
4 Tail shield
4b Mud pipe
4c Mud pipe
4d Water stop valve
4e optical system
5 Jack
6 End plate
10 Body
10a Open part
11 shelves
12, 13 end plate
11a Support piece
11b screw
13a groove
14 Connection
14a screw
14b bolt
15 Sliding plate
21 Guide rail
22 Jack
23 Press wheel
24 Mud supply device
25 Operation panel

Claims (1)

  After a leading conductor is disposed inside the propelling pipe and propelling the propelling pipe and the leading conductor to the ground, a new propelling pipe is followed by the propelled propelling pipe and the length and leading conductor corresponding to the length of the propelling pipe A transmission member having a strength capable of transmitting the thrust applied to the front conductor, and then propelling the propulsion pipe and the front conductor and the transmission member by applying a thrust to a new propulsion pipe and the transmission member, When the propulsion length of the propulsion pipe reaches a predetermined value by repeating the propulsion, the propulsion method is characterized in that the propulsion pipe is buried in the ground by pulling back the transmission member and the leading conductor through the propelled propulsion pipe. .

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