JPH0452306Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a shield tunneling machine equipped with a radar capable of detecting obstacles such as piles existing in the ground in front and a detection rod capable of confirming the obstacles. .

[Prior Art] Conventionally, shield tunneling machines have not been equipped with a device that can constantly search for obstacles in the ground in front of them.

For this reason, workers had to protrude a probe rod from the cutter slit into the ground in front of them to locate an obstacle.

[Problems that the invention aims to solve] However, it is difficult to reliably detect obstacles using a probe, and in many cases the Katsutabit only learns of the existence of an obstacle after it collides with it.
This caused problems such as the cutter bit being damaged by obstacles and the shield tunneling machine rolling due to reaction force.

[Purpose of the invention] The present invention was made to solve the problems of the prior art described above, and its purpose is to be able to constantly and reliably search for obstacles existing in the ground in front of the excavation direction, and to detect obstacles. To provide a shield excavator capable of preventing damage to cutters and rolling of the shield excavator by objects.

[Structure and operation of the invention] In order to achieve the above object, the invention includes a cutter face plate that is rotatably provided at the front end of the shield frame, and is equipped with a radar that detects obstacles such as piles in the ground in front. In addition, a detection rod is provided that can freely move forward from within the cutter face plate to confirm the position of the obstacle detected by the radar by directly contacting the obstacle by rotating the cutter face plate. shall be.

According to this configuration, by digging while using the radar to search for obstacles such as piles existing in the ground in front, it is possible to efficiently dig until approaching the obstacles. Once the obstacle has been detected, the excavation is stopped, the detection rod is protruded forward from inside the cutter face plate, and while adjusting its stroke, the cutter face plate is rotated to search for the position of the assumed obstacle using the radar, and the detection rod is When the cutter comes into contact with an obstacle, the cutter load increases, which makes it possible to efficiently check the actual location of the obstacle.

Therefore, since there is an error in the position of detected obstacles using radar alone, it takes time to find the obstacles when going out to the face and removing them.
Since the actual location of the obstacle can be confirmed by using a detection rod to detect the area assumed by the radar, the obstacle can be quickly removed.

In particular, since the detection rod is protruded into the ground and the inside of the ground is searched by rotating the cutter face plate, the area of the cutter face plate can be easily detected.

[Example] An example of the present invention will be described below in detail based on the accompanying drawings.

In FIG. 1 showing a schematic longitudinal section of a shield tunneling machine, reference numeral 1 denotes a cylindrical shield frame, and a cutter face plate 2 is rotatably provided at the front end of the frame. As shown in FIG. 2, a cutter bit 3 for excavating the face ground is attached to the cutter face plate 2, and excavated soil is taken into a cutter chamber 6 formed between the cutter face plate 2 and the bulkhead 5 behind it. A cutter slit 7 for insertion is formed. The excavated earth and sand taken into the cutter chamber 6 is transported rearward through the bulkhead 5 by a screw conveyor (not shown) or by fluid transport.

On the outer periphery of the front surface of the cutter face plate 2, there is a radar 9 consisting of an electromagnetic transmitter and a receiver for detecting obstacles 8 such as piles (H steel, PC concrete piles, etc.) and boulders that exist in front of the cutter face plate 2 in the excavation direction. It is provided. In addition, the radar 9 can be attached to the cutter face plate 2 as necessary.
It is installed at an appropriate location above. Also, this radar 9
In order to prevent wear of the cutter face plate 2, as shown in Fig. 3, the radar 9 is fitted into the mounting hole 10 formed in the cutter face plate 2 using a cylinder 11 so as to be freely retractable. You may also make it immersive.

A detection signal from the radar 9 is guided to a signal processor 15 by a cable 14 via a conduit 12 provided at the axis of the cutter face plate 2 and a slip ring 13 provided at the bulkhead 5.
In addition, an FM transmitter (not shown) is provided on the cutter face plate 2 instead of the cable 14, and the signal processor 1 is then connected to the cutter face plate 2.
Alternatively, the detection signal may be sent directly to 5.

The signal processor 15 calculates the condition of the ground based on the detection signal from the radar 9, and the signal processor 15 includes a display (cathode ray tube) 17 that outputs the condition of the ground in the form of an image. A recorder 18 for recording the condition of the ground is connected.

In order to confirm the presence of the obstacle 8 detected by the radar 9, a detection rod 16 is provided on the front surface of the cutter face plate 2 on substantially the same circumference as the radar 9 so as to be able to appear and retract. There is. A cylinder chamber 19 is formed inside the detection rod 16, and the base end of the rod 21 of the piston 20, which is slidably fitted into the cylinder chamber 19, is attached to the back surface of the cutter face plate 2 on the side of the cutter chamber 6 with a bracket. 22. Further, the cutter face plate 2 is formed with a through hole 23 through which the tip of the detection rod 16 can freely move forward and retract toward the ground side. The detection rod 16 can be moved forward and retracted from the cutter face plate 2 by applying hydraulic pressure to one side or the other side of the cylinder chamber 19 through oil passages 24 and 25 formed in the piston 20 and the rod 21. ing. In the embodiment, the detection rod 16 is inclined diagonally outward, but it may be perpendicular to the cutter face plate 2, etc.
An appropriate arrangement configuration that makes it easy to detect the obstacle 8 may be used.

To check the obstacle 8 using the detection rod 16, use the detection rod 1.
Since a large load is applied to the motor 26 which rotates the cutter face plate 2 when the cutter 6 hits the obstacle 8, this load is detected. Incidentally, this load detection signal may be sent to the signal processor 15, and the fact that the obstacle 8 has been confirmed may be displayed on the display 17 and also recorded on the recorder 18. Next, we will discuss the effect. During excavation, a radar 9 constantly searches to see if an obstacle 8 appears. The electromagnetic waves emitted by Radar 9 travel within the ground,
When it hits an obstacle 8, it is reflected and detected by radar 9. The strength of the reflected waves varies depending on the soil quality and the distance from the obstacle 8, and the difference in echo radio waves is detected by the signal processor 15.
The condition of the ground is displayed on the display 17 and recorded on the recorder 18. In this case, the position of the obstacle 8 can be determined by detecting it in synchronization with the rotation of the cutter face plate 2.

However, although the radar 9 calculates the distance to the obstacle 8 based on the round trip time of the electromagnetic waves, an error occurs in the position of the obstacle because the passing speed of the electromagnetic waves changes depending on the condition of the ground.

Therefore, when the obstacle 8 is detected by the radar 9, the excavation is stopped and the detection rod 16 is extended into the ground to confirm the existence of the obstacle 8. That is, the cutter face plate 2 is rotated to find out whether or not the obstacle 8 is definitely located at the position of the obstacle 8 detected by the radar 9 while adjusting the extension length using the detection rod 16. When the detection rod 16 hits the obstacle 8, the cutter load increases, so the presence of the obstacle 8 can be known, and depending on the position of the detection rod 16, the cutter load increases.
You can check the position and azimuth. After confirming the obstacle, the worker goes out to the face from inside the shield excavator and removes the obstacle 8. In this way, since the radar 9 is constantly searching, it is possible to efficiently dig until the obstacle 8 is approached during excavation, and when the obstacle 8 is detected, the excavation is stopped and the detection rod 16 is used to detect the obstacle 8. Radar 9 to check obstacle 8
Even if the worker erroneously detects the obstacle 8, it can be confirmed with the detection rod 16, and the worker will not go out to the face thinking that the obstacle 8 is there. In addition, as mentioned above, since the obstacle 8 can be confirmed, the cutter bit 3 on the cutter face plate 2 can be detected by the obstacle 8.
Collision with the cutter bit 3 and rolling of the shield frame 1 can be prevented.

[Effects of the invention] In summary, the present invention provides the following excellent effects.

(1) By digging while using the radar to search for obstacles such as piles in the ground ahead, it is possible to efficiently dig until the obstacle is approached. When an obstacle is detected, the excavation is stopped, the detection rod is projected forward from inside the cutter face plate, and while adjusting its stroke, the cutter face plate is rotated to search for the position of the assumed obstacle using the radar, and the detection rod is When the cutter comes into contact with an obstacle, the cutter load increases, which makes it possible to efficiently check the actual location of the obstacle.

(2) Therefore, when using radar alone, errors occur in the position of detected obstacles, so it takes time to find the obstacles when going out to the face and removing them. Since the actual position of the obstacle can be confirmed by searching with a detection rod, the obstacle can be quickly removed, and damage to the cutter bit and rolling of the shield excavator due to the obstacle can be prevented.

(3) In particular, since the detection rod is protruded into the ground and the inside of the ground is searched by rotating the cutter face plate, the excavated area of the cutter face plate can be easily detected.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of the shield tunneling machine according to the present invention, Fig. 2 is a view taken along arrow A-A in Fig. 1, Fig. 3 is an enlarged sectional view of the radar mounting part, and Fig. 4 is a detection rod mounting part. FIG. In the figure, 2 is a cutter face plate, 8 is an obstacle, 9 is a radar, and 16 is a detection rod.

Claims (1)

[Scope of utility model registration request] A cutter face plate rotatably provided at the front end of the shield frame is equipped with a radar that detects obstacles such as piles in the ground in front, and the cutter detects the position of the obstacle detected by the radar. A shield excavator characterized in that a detection rod is provided in the cutter face plate so as to be able to come out and move forward from inside the cutter face plate for directly contacting and checking an obstacle by rotating the face plate.