Construction device for forepiling pipe, and forepiling method

Abstract

To provide a construction device for a forepiling pipe that allows an operator to easily grasp a status of coupling work of the forepiling pipe, and a forepiling method.SOLUTION: A drill jumbo 10 includes: a guide cell 13; a rock drill 20; a coupling device 30 that couples two forepiling pipes 3; a distance measuring unit 40 that measures a distance from a reference position on the guide cell 13 to the rock drill 20; and a display unit 70 and a light emitting device 80 that notify an operator OP1 of information corresponding to a measurement result of the distance measuring unit 40. The rock drill 20 moves from an origin position on the guide cell 13 to a coupling position, thereby fitting a rear end of a first forepiling pipe inserted into a natural ground 2 with a tip of a following second forepiling pipe in the coupling device 30. In addition, the rock drill 20 moves from the coupling position on the guide cell 13 to an insertion position, thereby inserting the second forepiling pipe coupled to the first forepiling pipe into the natural ground 2 while excavating the natural ground 2.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a construction device for a front support pipe and a front support method.

Background Art

[0002] As an auxiliary method for the NATM (New Austrian Tunneling Method), which is an example of a tunnel construction method, the AGF (All Ground Fasten) method is known (see, for example, Patent Document 1). In the AGF method, by operating a construction device for a front support pipe called a face drilling machine (drill jumbo), a plurality of front support pipes are driven into the ground in the tunneling direction while adding them in the pipe axis direction.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, an operator who operates the face drilling machine operates each part of the face drilling machine from a position away from the work place where the front support pipes are connected. Therefore, the operator who operates the face drilling machine performs operations for connecting the front support pipes relying on signals from the workers at the work place where the connection is made. Therefore, in the conventional connection work of the front support pipes, it has been difficult for the operator who actually operates the face drilling machine to grasp the situation of the connection work of the front support pipes.

Means for Solving the Problems

[0005] The construction device for the forepoling pipe that solves the above problems is a construction device for the forepoling pipe that inserts the forepoling pipe into the ground while excavating the ground in the tunneling direction by a rock drill, and moves the rock drill to insert the forepoling pipe into the ground. It includes a connecting device that connects the rear end of the first forepoling pipe inserted into the ground and the front end of the subsequent second forepoling pipe, a guide cell that guides the movement of the rock drill, and by moving from the origin position on the guide cell to the connection position, the front end of the second forepoling pipe is placed in the connecting device where the rear end of the first forepoling pipe is arranged, and by moving from the connection position on the guide cell to the insertion position, the rock drill that inserts the second forepoling pipe into the ground so that the rear end of the second forepoling pipe connected to the first forepoling pipe is located within the connecting device, a distance measuring unit that measures the distance from the reference position on the guide cell to the rock drill, and a notification unit that notifies the operator of information according to the measurement result of the distance measuring unit.

Effect of the Invention

[0006] According to the present invention, the operator can easily grasp the situation of the connection work of the forepoling pipe.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

DETAILED DESCRIPTION OF THE INVENTION

[0008] An embodiment of the device for constructing a forepoling pipe and the forepoling method will be described with reference to FIGS. 1 to 8. [Overall Configuration] As shown in FIG. 1, a drill jumbo 10, which is an example of a device for constructing a forepoling pipe, is disposed in a tunnel 1. The drill jumbo 10 is responsible for the construction of the AGF method, particularly the AGF-Sq method, in the tunnel 1 being constructed by the NATM method. The drill jumbo 10 inserts a forepoling pipe 3 into the ground 2 in the driving direction D1 of the tunnel 1.

[0009] The forepoling pipe 3 is, as an example, a cylindrical long forepoling steel pipe used in the AGF method. The forepoling pipe 3 is provided with through holes on its outer peripheral surface. The forepoling pipe 3 is inserted into the ground 2 such that its pipe axis direction D2 is inclined slightly upward with respect to the driving direction D1. In the forepoling method of this embodiment, a plurality of forepoling pipes 3 are inserted into the ground 2 while being connected. By injecting a urethane-based or cement-based reinforcing material into the forepoling pipe 3 inserted into the ground 2, the reinforcing material flows into the ground 2 from the through holes provided on the outer peripheral surface of the forepoling pipe 3. Thereby, the ground 2 is reinforced.

[0010] A bit 4 is provided at the tip of the leading forepoling pipe 3 among the plurality of connected forepoling pipes 3. The bit 4 is an example of a cutting edge for excavating the ground 2. A rod 5 for hole drilling is inserted into the forepoling pipe 3. The rod 5 is added in the same manner as the forepoling pipe 3. The rods 5 are connected to each other, for example, by screwing. The rod 5 is connected to transmit the driving force from a rock drill 20, which will be described later, to the bit 4.

[0011] [Drill Jumbo 10] The jumbo drill 10 includes a vehicle body 11, a boom 12 extending from the vehicle body 11, and a guide cell 13 provided at the tip of the boom 12. An operator OP1 who operates the jumbo drill 10 is aboard the driver's seat 11A of the vehicle body 11. In the jumbo drill 10, the boom 12 is configured to be swung up and down, left and right, etc. with respect to the vehicle body 11 so that the guide cell 13 can be placed at any position within the tunnel 1.

[0012] The jumbo drill 10 includes a rock drill 20. The rock drill 20 is mounted on the guide cell 13. The rock drill 20 is configured to be able to move forward and backward along the pipe axis direction D2 on the guide cell 13. The guide cell 13 guides the movement of the rock drill 20 in the pipe axis direction D2 by, for example, a rail-like mechanism.

[0013] The rock drill 20 excavates the ground 2 by swinging a bit 4 located at the tip of the connected receiving pipe 3 through a rod 5 disposed inside the receiving pipe 3. Further, the rock drill 20 inserts the receiving pipe 3 into the ground 2 by moving forward along the pipe axis direction D2 on the guide cell 13 toward the ground 2. The guide cell 13 supports the receiving pipe 3 by a jig or the like (not shown) so that the receiving pipe 3 installed on the guide cell 13 moves along the pipe axis direction D2.

[0014] Note that FIG. 1 shows a state where the receiving pipe 3 inserted into the ground 2 and the rod 5 located inside thereof are disposed on the guide cell 13 in a state where the subsequent receiving pipes 3 and rods 5 are not connected.

[0015] The jumbo drill 10 includes a connecting device 30. The connecting device 30 is mounted at the tip of the guide cell 13. The connecting device 30 connects the receiving pipes 3 to each other. As an example, the connecting device 30 is a squeeze unit that connects the receiving pipes 3 to each other by crimping. The squeeze unit includes a crimping hole. The squeeze unit connects the ends of the two receiving pipes 3 disposed inside the crimping hole to each other by crimping.

[0016] The drill jumbo 10 is provided with a distance measurement unit 40. The distance measurement unit 40 measures the distance from the reference position on the guide cell 13 to the rock drill 20. The distance measurement unit 40 is, for example, a laser distance meter mounted on the rear end of the guide cell 13. The laser distance meter as the distance measurement unit 40 measures the distance from the reference position where the distance measurement unit 40 is arranged in the guide cell 13 to the rock drill 20, with the position where the distance measurement unit 40 is arranged as the reference position.

[0017] When a laser distance meter is used as the distance measurement unit 40, it is preferable that the rock drill 20 is provided with a reflector 41 at its rear end. In this embodiment, the reflector 41 is regarded as a part of the rock drill 20. That is, in this embodiment, the distance from the reference position where the distance measurement unit 40 is arranged to the reflector 41 is treated as the distance from the distance measurement unit 40 to the rock drill 20. Therefore, the laser distance meter as the distance measurement unit 40 measures the distance from the distance measurement unit 40 to the rock drill 20 by measuring the distance from the distance measurement unit 40 to the reflector 41.

[0018] The drill jumbo 10 is provided with an imaging unit 50. The imaging unit 50 images the vicinity of the connecting device 30, particularly the connection part of the two receiving pipes 3 connected by the connecting device 30. In other words, the imaging unit 50 acquires an image reflecting the positional relationship of the two receiving pipes 3 connected by the connecting device 30. The imaging unit 50 is, for example, a digital camera. The imaging unit 50 is fixed at a predetermined position on the guide cell 13, for example.

[0019] The drill jumbo 10 may be provided with a plurality of booms 12 and a plurality of guide cells 13. In this case, by swinging each boom 12 with respect to the vehicle body 11, each guide cell 13 can be arranged at an arbitrary position in the tunnel 1. Also, in this case, each guide cell 13 is provided with a rock drill 20, a connecting device 30, a distance measurement unit 40, and an imaging unit 50.

[0020] The Drilling Jumbo 10 is provided with a control device 60. The control device 60 is provided on the vehicle body 11. The control device 60 is, for example, a computer terminal that can be operated and input by the operator OP1.

[0021] The Drilling Jumbo 10 is provided with a display unit 70 and a light emitting device 80. The display unit 70 and the light emitting device 80 are arranged at positions visible to the operator OP1 in the driver's seat 11A. The display unit 70 displays various information output from the control device 60. The display unit 70 is, for example, a display.

[0022] The light emitting device 80 is, for example, a rotating light. The light emitting device 80 changes its lighting state according to a signal output from the control device 60. The change in the lighting state may be a change in the color of the light to be lit, a switching between lighting and extinguishing, and a switching from a continuously lit state or an extinguished state to an intermittently lit (flashing) state.

[0023] [Device Configuration of Drilling Jumbo 10] As shown in FIG. 2, in the Drilling Jumbo 10, the control device 60 is configured to be able to communicate with the connecting device 30, the distance measuring unit 40, the imaging unit 50, the display unit 70, and the light emitting device 80 mutually.

[0024] The control device 60 includes a control unit 61, a storage unit 62, and an input unit 63. The control unit 61 executes various processes in the control device 60. The control unit 61 is, for example, a CPU, an MPU, etc. The storage unit 62 is a storage device that stores data and various programs for executing various functions of the control device 60. The storage unit 62 is a non-volatile memory such as an SSD or an HDD. The input unit 63 is a device such as an operation button or a keyboard that receives input of various information from the operator OP1.

[0025] The control unit 61 acquires the pressure when the connecting device 30 connects the receiving pipes 3 to each other by crimping from the connecting device 30. The control unit 61 displays the acquired pressure on the display unit 70 and changes the lighting state of the light emitting device 80 according to the acquired pressure.

[0026] The control unit 61 acquires from the distance measurement unit 40 the measurement result of the distance from the distance measurement unit 40 to the rock drill 20. The control unit 61 displays distance information corresponding to the acquired measurement result on the display unit 70, and changes the lighting state of the light emitting device 80 according to the acquired measurement result of the distance.

[0027] The control unit 61 acquires from the imaging unit 50 the video data imaged by the imaging unit 50, which is the video data of the connection part of the two receiving pipes 3 connected by the connecting device 30. The control unit 61 displays the acquired video data on the display unit 70.

[0028] The control unit 61 lights the light emitting device 80 in any one of the first lighting state to the fourth lighting state according to the pressure when the connecting device 30 connects the receiving pipes 3 by crimping and the measurement result of the distance from the distance measurement unit 40 to the rock drill 20.

[0029] The first lighting state is a state indicating that the drill jumbo 10 is under construction of the receiving pipe 3. In the first lighting state, for example, the light emitting device 80 lights the light of the first color (for example, green). The second lighting state is a state indicating that the pressure at the time of crimping acquired from the connecting device 30 has reached a specified value at which the crimping of the receiving pipes 3 is sufficiently performed. In the second lighting state, for example, the light emitting device 80 lights the light of the second color (for example, red). The storage unit 62 stores the pressure threshold of the connecting device 30 at which the control unit 61 changes the light emitting device 80 to the second lighting state.

[0030] The third lighting state is a state indicating that when inserting the subsequent receiving pipe 3 connected to the receiving pipe 3 inserted into the natural ground 2 into the natural ground 2, the insertion amount of the subsequent receiving pipe 3 into the natural ground 2 has reached near the target value (for example, 90% of the target value). In the third lighting state, for example, the light emitting device 80 lights the light of the third color (for example, yellow).

[0031] The fourth lighting state is a state indicating that when inserting a subsequent receiving pipe 3 connected to the receiving pipe 3 inserted into the ground 2 into the ground 2, the insertion amount of the subsequent receiving pipe 3 into the ground 2 has reached the target value. In the fourth lighting state, for example, the light emitting device 80 lights up light of the fourth color (for example, pink).

[0032] The insertion amount of the subsequent receiving pipe 3 into the ground 2 corresponds to the distance from the distance measuring unit 40 to the rock drill 20. Therefore, the insertion amount of the subsequent receiving pipe 3 into the ground 2 can be estimated from the measurement result of the distance measuring unit 40. The storage unit 62 stores a first threshold value of the measurement result of the distance measuring unit 40 for changing the light emitting device 80 to the third lighting state and a second threshold value of the measurement result of the distance measuring unit 40 for changing the light emitting device 80 to the fourth lighting state. The control unit 61 lights up the light emitting device 80 in the third lighting state when the measurement result of the distance measuring unit 40 is equal to or greater than the first threshold value and less than the second threshold value. Then, the control unit 61 lights up the light emitting device 80 in the fourth lighting state when the measurement result of the distance measuring unit 40 is equal to or greater than the second threshold value.

[0033] As shown in FIG. 3, in the driver's seat 11A, the display unit 70 and the light emitting device 80 are arranged close to each other so that the operator OP1 can easily grasp the change in the lighting state of the light emitting device 80 while looking at the display unit 70.

[0034] The screen displayed on the display unit 70 includes a pressure display unit 71, a distance display unit 72, and a video display unit 73. The pressure display unit 71 displays in real time the pressure when connecting the receiving pipes 3 acquired from the connecting device 30. The distance display unit 72 displays in real time distance information corresponding to the measurement result acquired from the distance measuring unit 40. The video display unit 73 displays in real time the video data acquired from the imaging unit 50.

[0035] The distance information corresponding to the measurement result obtained from the distance measurement unit 40 may be numerical information indicating the measurement result of the distance from the distance measurement unit 40 to the rock drill 20 itself, or may be numerical information indicating a value obtained by performing correction such that a position other than the reference position is set as the origin with respect to the measurement result. Further, in FIG. 3, an example of the display form of the distance information that displays the measurement result as a numerical value is illustrated, but the present invention is not limited thereto. For example, as the distance information, an object that displays the relative position of the rock drill 20 on the guide cell 13 may be displayed.

[0036] When the operator OP1 moves the rock drill 20, the operator OP1 operates the rock drill 20 while checking the distance information displayed on the display unit 70 and the lighting state of the light emitting device 80. Therefore, the display unit 70 that displays the distance information corresponding to the measurement result of the distance measurement unit 40 and the light emitting device 80 that lights up in the lighting state corresponding to the measurement result of the distance measurement unit 40 function as a notification unit that notifies the operator OP1 of the information corresponding to the measurement result of the distance measurement unit 40.

[0037] [Advance grouting method] With reference to FIGS. 4 to 8, an advance grouting method using the drill jumbo 10, that is, a construction method of the advance grouting pipe 3 into the natural ground 2 in the tunnel 1 will be described. As shown in FIG. 4, the advance grouting method of the present embodiment includes steps S1 to S7.

[0038] Note that throughout the steps S1 to S7, the distance measuring unit 40 measures the distance from the reference position where the distance measuring unit 40 is disposed to the rock drill 20 by irradiating the reflector 41 with the laser LA1 (see FIGS. 5 to 8). Further, throughout the steps S1 to S7, the imaging unit 50 images the vicinity of the connecting device 30. The control unit 61 displays, on the display unit 70, the distance information corresponding to the measurement result acquired from the distance measuring unit 40 and the video data acquired from the imaging unit 50. Then, at the start of step S1, the control unit 61 turns on the light emitting device 80 in the first lighting state. Note that the control unit 61 may display, on the display unit 70, the pressure acquired from the connecting device 30 throughout the steps S1 to S7, or may display, on the display unit 70, the pressure acquired from the connecting device 30 only while the connecting device 30 is performing crimping.

[0039] First, the operator OP1 inserts the leading receiving pipe 3 into the ground 2 while drilling the ground 2 using the bit 4 attached to the tip of the leading receiving pipe 3 (step S1). At this time, the rock drill 20 drills the ground 2 by swinging the bit 4 provided at the tip of the receiving pipe 3 via the rod 5.

[0040] As shown in FIG. 5, at the completion of step S1, the leading receiving pipe 3 is inserted into the ground 2 such that the rear end 3E thereof is positioned inside the crimping hole of the connecting device 30. Hereinafter, the receiving pipe 3 in the state of being inserted into the ground 2 will be described as the first receiving pipe 3A. At the completion of step S1, the leading receiving pipe 3 corresponds to the first receiving pipe 3A.

[0041] As shown in FIG. 5, next, the operator OP1 moves the rock drill 20 on the guide cell 13 to the origin position on the guide cell 13 by retracting the rock drill 20 on the guide cell 13 from the ground 2 side (step S2). In the present embodiment, the rock drill 20 is moved so that the reflector 41 attached to the rear end of the rock drill 20 is located at the origin position on the guide cell 13. The origin position is a position separated from the distance measurement unit 40 by a predetermined origin distance L0 in the pipe axis direction D2. That is, the origin distance L0 corresponds to the distance from the reference position to the origin position. In FIGS. 5 to 8, the illustration of the rod 5 is omitted.

[0042] In step S2, the operator OP1 moves the rock drill 20 to the origin position on the guide cell 13 based on the distance information displayed on the display unit 70. In the present embodiment, the control unit 61 displays, on the distance display unit 72 of the display unit 70, a numerical value obtained by converting the measurement result acquired from the distance measurement unit 40 into the distance from the origin position to the rock drill 20 based on the measurement result. For example, the control device 60 stores the value of the origin distance L0 in the storage unit 62. Then, the control unit 61 uses the value of the origin distance L0 stored in the storage unit 62 to convert the measurement result acquired from the distance measurement unit 40 into the distance from the origin position to the rock drill 20. In this case, the operator OP1 may move the rock drill 20 so that the value of the distance from the origin position to the rock drill 20 displayed on the display unit 70 becomes 0.

[0043] As shown in FIG. 6, next, a subsequent receiving pipe 3 is installed at a position between the rock drill 20 on the guide cell 13 and the coupling device 30 (step S3). Hereinafter, the subsequent receiving pipe 3 will be described as the second receiving pipe 3B. The second receiving pipe 3B is arranged on the guide cell 13 so that the tip 3T thereof faces the rear end 3E of the first receiving pipe 3A.

[0044] The tip 3T of the receiving pipe 3 is configured to have a smaller diameter than the rear end 3E of the receiving pipe 3. Specifically, the outer diameter of the tip 3T of the receiving pipe 3 is smaller than the inner diameter of the rear end 3E of the receiving pipe 3. Therefore, the two receiving pipes 3 are configured such that the tip 3T of the second receiving pipe 3B can be fitted into the rear end 3E of the first receiving pipe 3A.

[0045] Note that the installation of the subsequent receiving pipe 3 after step S3 may be performed by a worker different from the operator OP1, or the operator OP1 may remotely operate a loading unit for installing the receiving pipe 3 in the guide cell 13.

[0046] As shown in FIG. 7, next, the operator OP1 advances the rock drill 20 on the guide cell 13 toward the ground 2 side, so that the tip 3T of the second receiving pipe 3B is fitted to the rear end 3E of the first receiving pipe 3A located in the coupling device 30 (step S4). Specifically, the operator OP1 moves the rock drill 20 from the origin position on the guide cell 13 to the coupling position. Thereby, the second receiving pipe 3B is pushed forward by the rock drill 20 until the tip 3T of the second receiving pipe 3B is fitted to the rear end 3E of the first receiving pipe 3A located in the coupling device 30.

[0047] In the present embodiment, the rock drill 20 is moved so that the reflector 41 attached to the rear end of the rock drill 20 is located at the coupling position on the guide cell 13. The coupling position is a position where the tip 3T of the second receiving pipe 3B pushed forward as the rock drill 20 moves is fitted to the rear end 3E of the first receiving pipe 3A located in the coupling device 30. The coupling position is a position separated from the distance measuring unit 40 by a predetermined first distance L1 in the pipe axis direction D2. That is, the first distance L1 corresponds to the distance from the reference position to the coupling position.

[0048] In step S4, the operator OP1 moves the rock drill 20 to the coupling position on the guide cell 13 based on the distance information displayed on the display unit 70. In this case, the operator OP1 may move the rock drill 20 so that the value of the distance from the origin position displayed on the display unit 70 to the rock drill 20 becomes a value obtained by subtracting the origin distance L0 from the first distance L1. The first distance L1 is calculated in advance as a value obtained by subtracting the lengths of the receiving pipe 3 and the rock drill 20 from the distance from the reference position to the coupling device 30.

[0049] At the completion of step S4, the rear end 3E of the first receiving pipe 3A and the front end 3T of the second receiving pipe 3B are in a fitted state within the connecting device 30. In addition to the distance information displayed on the display unit 70, the operator OP1 can also confirm from the image displayed on the video display unit 73 of the display unit 70 whether the rear end 3E of the first receiving pipe 3A and the front end 3T of the second receiving pipe 3B are fitted within the connecting device 30.

[0050] Next, the operator OP1 crimps the rear end 3E of the first receiving pipe 3A and the front end 3T of the second receiving pipe 3B in the fitted state using the connecting device 30 (step S5). Thereby, the first receiving pipe 3A and the second receiving pipe 3B are connected.

[0051] At this time, the pressure during crimping acquired from the connecting device 30 is displayed on the display unit 70. Therefore, the operator OP1 can confirm that the crimping of the rear end 3E of the first receiving pipe 3A and the front end 3T of the second receiving pipe 3B is completed by checking the pressure displayed on the display unit 70.

[0052] Also, when the pressure during crimping acquired from the connecting device 30 reaches a specified value at which sufficient crimping is performed, the control unit 61 changes the light emitting device 80 from the first lighting state to the second lighting state. The operator OP1 can confirm that the crimping of the rear end 3E of the first receiving pipe 3A and the front end 3T of the second receiving pipe 3B is completed by visually recognizing that the light emitting device 80 has changed from the first lighting state to the second lighting state. Note that when the crimping by the connecting device 30 is completed and the pressure is released, the control unit 61 changes the light emitting device 80 from the second lighting state back to the first lighting state.

[0053] Note that before the start of step S4 or after the completion of step S5, the rod 5 is added and extended, and the bit 4 provided at the front end of the leading receiving pipe 3 and the rock drill 20 are connected by a plurality of rods 5. Thereby, the driving force of the rock drill 20 can be transmitted to the bit 4.

[0054] Next, as shown in FIG. 8, the operator OP1 uses the bit 4 attached to the tip of the leading pilot tube 3 to drill into the ground 2 while inserting the subsequent pilot tube 3, i.e., the second pilot tube 3B, into the ground 2 (step S6). At this time, the rock drill 20 drills into the ground 2 by swinging the bit 4 provided at the tip of the pilot tube 3 via the rod 5.

[0055] In step S6, the operator OP1 moves the rock drill 20 from the connection position on the guide cell 13 to the insertion position while swinging the bit 4 with the rock drill 20. Thereby, the rock drill 20 drills into the ground 2 by swinging the bit 4 via the rod 5 and inserts the subsequent second pilot tube 3B into the ground 2 by pushing forward the second pilot tube 3B.

[0056] In the present embodiment, the rock drill 20 is moved so that the reflector 41 attached to the rear end of the rock drill 20 is located at the insertion position on the guide cell 13. The insertion position is a position where the rear end 3E of the second pilot tube 3B that is pushed forward as the rock drill 20 moves is disposed inside the crimping hole of the connecting device 30. That is, in step S6, by moving the rock drill 20 to the insertion position, the second pilot tube 3B is inserted into the ground 2 so that the rear end 3E of the second pilot tube 3B is located inside the connecting device 30. The insertion position is a position spaced apart from the distance measuring unit 40 by a predetermined second distance L2 in the pipe axis direction D2. That is, the second distance L2 corresponds to the distance from the reference position to the insertion position.

[0057] In step S6, the operator OP1 moves the rock drill 20 to the insertion position on the guide cell 13 based on the distance information displayed on the display unit 70. In this case, the operator OP1 may move the rock drill 20 so that the value of the distance from the origin position displayed on the display unit 70 to the rock drill 20 becomes a value obtained by subtracting the origin distance L0 from the second distance L2. The second distance L2 is calculated in advance as a value obtained by subtracting the length of the rock drill 20 from the distance from the reference position to the connecting device 30.

[0058] In addition to the distance information displayed on the display unit 70, the operator OP1 can also check from the video displayed on the video display unit 73 of the display unit 70 whether the rear end 3E of the second receiving pipe 3B is disposed within the connecting device 30.

[0059] In step S6, the control unit 61 changes the lighting state of the light emitting device 80 according to the measurement result of the distance from the reference position acquired by the distance measurement unit 40 to the rock drill 20. As an example, when the measurement result acquired by the distance measurement unit 40 reaches the first threshold value, the control unit 61 changes the light emitting device 80 from the first lighting state to the third lighting state. The first threshold value is, for example, 90% of the distance with respect to the second distance L2 from the reference position to the insertion position.

[0060] Note that the first threshold value of the measurement result of the distance measurement unit 40 is not limited to the value of 90% of the second distance L2, and any value that is larger than the first distance L1 and smaller than the second distance L2 can be adopted. For example, the first threshold value may be 90% of the value obtained by subtracting the origin distance L0 from the second distance L2.

[0061] Then, when the measurement result acquired by the distance measurement unit 40 reaches 100% with respect to the second distance L2 from the reference position to the insertion position, the control unit 61 changes the light emitting device 80 from the third lighting state to the fourth lighting state. That is, the second threshold value of the measurement result of the distance measurement unit 40 at which the control unit 61 lights the light emitting device 80 in the fourth lighting state is set to the second distance L2 from the reference position to the insertion position.

[0062] Therefore, the operator OP1 can confirm that the rock drill 20 has approached the insertion position by visually recognizing that the light emitting device 80 has changed from the first lighting state to the third lighting state. In addition, the operator OP1 can confirm that the rock drill 20 has reached the insertion position by visually recognizing that the light emitting device 80 has changed from the third lighting state to the fourth lighting state. In this case, the operator OP1 can stepwise confirm whether the rock drill 20 has reached the insertion position based on the lighting state of the light emitting device 80.

[0063] After completion of step S6, if the connection of all the receiving pipes 3 is completed, the construction of the receiving pipes 3 is completed (step S7: YES). If additional receiving pipes 3 are to be added, the process returns to step S2, and the steps S2 to S6 are performed again (step S7: NO). At this time, in step S2, when the rock drill 20 is moved to the origin position, the control unit 61 lights the light emitting device 80 in the first lighting state when the measurement result of the distance measurement unit 40 is less than the first threshold value according to the measurement result of the distance measurement unit 40.

[0064] [Operation and Effect of Embodiment] (1) The drill jumbo 10 moves the rock drill 20 on the guide cell 13 from the origin position to the connection position, so that the tip 3T of the subsequent second receiving pipe 3B and the rear end 3E of the first receiving pipe 3A inserted into the natural ground 2 are fitted together in the connecting device 30. Then, the connecting device 30 crimps the rear end 3E of the first receiving pipe 3A and the subsequent second receiving pipe 3B. Thereafter, by moving the rock drill 20 from the connection position to the insertion position, the subsequent second receiving pipe 3B is inserted into the natural ground 2, and the rear end 3E of the second receiving pipe 3B is disposed in the connecting device 30. By repeating such a procedure, a plurality of receiving pipes 3 are inserted into the natural ground 2.

[0065] At this time, the distance measurement unit 40 measures the distance from the reference position to the rock drill 20. Then, the display unit 70 displays distance information according to the measurement result of the distance measurement unit 40. Also, the light emitting device 80 lights up in a lighting state according to the measurement result of the distance measurement unit 40. That is, information according to the measurement result of the distance measurement unit 40 is output to the display unit 70 and the light emitting device 80. In this way, by notifying the operator OP1 of the information according to the measurement result of the distance measurement unit 40 using the display unit 70 and the light emitting device 80, the operator OP1 can easily grasp the status of the connection work of the receiving pipe 3. Therefore, the connection work can be performed without arranging a worker different from the operator OP1 in the vicinity of the guide cell 13 where the connection work of the receiving pipe 3 is conventionally performed.

[0066] (2) Display the distance information corresponding to the measurement result of the distance measurement unit 40 on the distance display unit 72 of the display unit 70. Thereby, the operator OP1 can grasp the status of the connection work of the receiving pipe 3 based on the displayed distance information.

[0067] (3) The control unit 61 changes the lighting state of the light emitting device 80 according to the measurement result of the distance measurement unit 40. Thereby, the operator OP1 can grasp the status of the connection work of the receiving pipe 3 based on the change in the lighting state of the light emitting device 80. In addition, information corresponding to the measurement result of the distance measurement unit 40 can be intuitively notified to the operator OP1.

[0068] (4) On the video display unit 73 of the display unit 70, a video showing the positional relationship between the two receiving pipes 3 connected by the connecting device 30 is displayed. The operator OP1 can confirm whether the alignment between the rear end 3E of the first receiving pipe 3A and the tip 3T of the second receiving pipe 3B is appropriately performed based on the video displayed on the video display unit 73.

[0069] (5) On the pressure display unit 71 of the display unit 70, the pressure when the connecting device 30 connects the two receiving pipes 3 by crimping is displayed. The operator OP1 can confirm whether the crimping between the rear end 3E of the first receiving pipe 3A and the tip 3T of the second receiving pipe 3B is completed based on the pressure displayed on the pressure display unit 71 of the display unit 70.

[0070] (6) The control unit 61 changes the lighting state of the light emitting device 80 according to the pressure when the connecting device 30 connects the two receiving pipes 3 by crimping. Thereby, the operator OP1 can confirm whether the crimping between the rear end 3E of the first receiving pipe 3A and the tip 3T of the second receiving pipe 3B is completed based on the change in the lighting state of the light emitting device 80. In addition, it is possible to intuitively notify the operator OP1 whether the crimping is completed.

[0071] [Modification Example] This embodiment can be implemented with the following modifications. This embodiment and the following modification examples can be implemented in combination with each other within a technically non - conflicting range.

[0072] · The drill jumbo 10 may be configured to notify the operator OP1 of information corresponding to the measurement result of the distance measurement unit 40 using at least a notification unit such as the display unit 70 and the light emitting device 80, and the configurations of the imaging unit 50 and the video display unit 73 may be omitted. Similarly, the drill jumbo 10 may omit the configuration of displaying the pressure acquired by the control unit 61 from the connecting device 30 on the pressure display unit 71.

[0073] · The drill jumbo 10 may be provided with at least one of the display unit 70 and the light emitting device 80 that function as a notification unit. That is, the drill jumbo 10 may be provided with at least one of the display unit 70 that displays distance information corresponding to the measurement result of the distance measurement unit 40, and the light emitting device 80 that changes its lighting state according to the measurement result of the distance measurement unit 40. Further, the drill jumbo 10 may be provided with another device that functions as a notification unit instead of, or in addition to, the display unit 70 and the light emitting device 80 that function as a notification unit. For example, when the drill jumbo 10 is provided with a speaker that functions as a notification unit, the speaker may be configured to emit a notification sound or an announcement corresponding to the measurement result of the distance measurement unit 40.

[0074] · When the rock drill 20 approaches the insertion position, the control unit 61 lights up the light emitting device 80 in the third lighting state, and when the rock drill 20 reaches the insertion position, the control unit 61 lights up the light emitting device 80 in the fourth lighting state. Instead of this, or in addition to this, the control unit 61 may light up the light emitting device 80 in the fifth lighting state when the rock drill 20 approaches the connection position, or may light up the light emitting device 80 in the sixth lighting state when the rock drill 20 reaches the connection position. The fifth lighting state is, for example, a state in which the light emitting device 80 lights up light of the fifth color. The sixth lighting state is, for example, a state in which the light emitting device 80 lights up light of the sixth color. That is, the control unit 61 changing the lighting state of the light emitting device 80 according to the measurement result of the distance measurement unit 40 means changing the light emitting device 80 from the previous lighting state to another lighting state at a predetermined timing according to the measurement result of the distance measurement unit 40. The timing at which the control unit 61 is according to the measurement result of the distance measurement unit 40 includes, for example, at least one of the timings when the rock drill 20 approaches the insertion position, reaches the insertion position, approaches the connection position, and reaches the connection position.

[0075] · The control unit 61 has been exemplified as having a configuration in which when the pressure acquired from the connecting device 30 reaches a specified value at which sufficient crimping is performed, the control unit 61 changes the light emitting device 80 from the first lighting state to the second lighting state. However, the present invention is not limited to this. For example, the control unit 61 may change the light emitting device 80 from the first lighting state to another lighting state when the pressure of the connecting device 30 approaches the specified value at which sufficient crimping is performed, and then change to the second lighting state when the pressure of the connecting device 30 reaches the specified value. In this case, the operator OP1 can be notified step by step of the pressure at which the connecting device 30 performs crimping. Further, the control unit 61 may change the lighting state of the light emitting device 80 when the pressure acquired from the connecting device 30 becomes excessively large, or when the pressure is too small at the time of completion of crimping.

[0076] · The configuration in which the control unit 61 changes the lighting state of the light emitting device 80 according to the pressure acquired from the connecting device 30 may be omitted. For example, when the drill jumbo 10 is provided with a speaker that functions as a notification unit, the control unit 61 may be configured to emit a notification sound or an announcement according to the pressure acquired from the connecting device 30 from the speaker.

[0077] ·The connection form of the two receiving pipes 3 is not limited to crimping, and other connection forms such as screwing and welding may also be used. Further, it is not limited to the form of connecting the rear end 3E of the first receiving pipe 3A and the front end 3T of the second receiving pipe 3B in a fitted state, and the end face of the rear end 3E of the first receiving pipe 3A and the end face of the front end 3T of the second receiving pipe 3B may be butted and connected. In this case, the receiving pipe 3 may have a constant diameter from the front end 3T to the rear end 3E.

[0078] ·The distance measurement unit 40 is not limited to a laser distance meter, and may be an ultrasonic distance meter or other measuring instruments such as a wheel-type distance measuring device. In this case, the reflector 41 attached to the rear end of the rock drill 20 may be omitted.

[0079] [Appendix] According to the above embodiments and their modified examples, the following technical ideas are further derived. [Appendix 1] A construction device for a receiving pipe that inserts a receiving pipe into the ground while excavating the ground in the tunneling direction by a rock drill, and a connecting device that connects the rear end of the first receiving pipe inserted into the ground and the front end of the subsequent second receiving pipe by crimping among the plurality of receiving pipes; a guide cell that guides the movement of the rock drill; by moving from the origin position on the guide cell to the connection position, the front end of the second receiving pipe is arranged in the connecting device where the rear end of the first receiving pipe is arranged, and by moving from the connection position on the guide cell to the insertion position, the rock drill that inserts the second receiving pipe into the ground so that the rear end of the second receiving pipe connected to the first receiving pipe is located in the connecting device; a distance measurement unit that measures the distance from a reference position on the guide cell to the rock drill; a notification unit that notifies the operator of information according to the measurement result of the distance measurement unit; A pressure display unit that displays the pressure when the connecting device crimps the rear end of the first receiving pipe and the front end of the second receiving pipe. A construction device for receiving pipes.

[0080] According to the above-mentioned supplementary note 1, by notifying the operator of the information according to the measurement result of the distance measurement unit that measures the distance from the reference position on the guide cell to the rock drill, the operator can easily grasp the situation of the connection work of the receiving pipe. Furthermore, it is possible to easily confirm by the pressure display unit whether the crimping of the rear end of the first receiving pipe and the front end of the second receiving pipe is completed.

[0081] [Supplementary note 2] A light emitting device that changes the lighting state according to the pressure when the connecting device crimps the rear end of the first receiving pipe and the front end of the second receiving pipe. The construction device for receiving pipes according to supplementary note 1.

[0082] According to the above-mentioned supplementary note 2, it is possible to intuitively confirm whether the crimping of the rear end of the first receiving pipe and the front end of the second receiving pipe is completed based on the change in the lighting state.

Explanation of reference numerals

[0083] D1…Driving direction, D2…Pipe axis direction, L0…Origin distance, L1…First distance, L2…Second distance, LA1…Laser, OP1…Operator, S1~S7…Steps, 1…Tunnel, 2…Natural ground, 3…Receiving pipe, 3A…First receiving pipe, 3B…Second receiving pipe, 3E…Rear end, 3T…Front end, 4…Bit, 5…Rod, 10…Drill jumbo, 11…Vehicle body, 11A…Driver's seat, 12…Boom, 13…Guide cell, 20…Rock drill, 30…Connecting device, 40…Distance measurement unit, 41…Reflector, 50…Imaging unit, 60…Control device, 61…Control unit, 62…Storage unit, 63…Input unit, 70…Display unit, 71…Pressure display unit, 72…Distance display unit, 73…Video display unit, 80…Light emitting device.

Claims

1. A device for installing a front support pipe that inserts the front support pipe into the ground while excavating the ground in the tunneling direction by a rock drill and moving the rock drill, comprising: a connecting device that connects the rear end of the first front support pipe inserted into the ground and the front end of the subsequent second front support pipe; a guide cell that guides the movement of the rock drill; a rock drill that, by moving from an origin position on the guide cell to a connection position, places the front end of the second front support pipe into the connecting device where the rear end of the first front support pipe is disposed, and by moving from the connection position on the guide cell to an insertion position, inserts the second front support pipe into the ground such that the rear end of the second front support pipe connected to the first front support pipe is positioned within the connecting device; a distance measurement unit that measures the distance from a reference position on the guide cell to the rock drill; a notification unit that notifies an operator of information according to the measurement result of the distance measurement unit. A device for installing a front support pipe.

2. Comprising a distance display unit that functions as the notification unit, wherein the distance display unit displays distance information according to the measurement result of the distance measurement unit. The device for installing a front support pipe according to Claim 1.

3. Comprising a light emitting device that functions as the notification unit, wherein the light emitting device changes its lighting state according to the measurement result of the distance measurement unit. The device for installing a front support pipe according to Claim 1 or 2.

4. An imaging unit that acquires an image reflecting the positional relationship between the rear end of the first front support pipe and the front end of the second front support pipe when the front end of the second front support pipe is placed in the connecting device where the rear end of the first front support pipe is disposed, and a video display unit that displays the video acquired by the imaging unit. The device for installing a front support pipe according to Claim 1.

5. A front support method for inserting a front support pipe into the ground by moving a rock drill on a guide cell while excavating the ground in the tunneling direction by the rock drill mounted on the guide cell, comprising: a step of moving the rock drill from an origin position on the guide cell to a connection position with the rear end of the first front support pipe inserted into the ground located within the connecting device, thereby placing the front end of the subsequent second front support pipe into the connecting device; a step of connecting the rear end of the first front support pipe and the front end of the second front support pipe by the connecting device. Moving the rock drill from the connection position on the guide cell to the insertion position to insert the second receiving pipe into the ground such that the rear end of the second receiving pipe connected to the first receiving pipe is positioned within the connecting device, and measuring the distance from the reference position on the guide cell to the rock drill and notifying the operator of information corresponding to the measurement result Receiving method.

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