JP5417232B2 - Exploration system, shield machine and shield machine excavation method - Google Patents

Description

  The present invention relates to an exploration system for exploring natural ground information in the vicinity of a face, a shield machine equipped with the exploration system, and an excavation method using the shield machine.

  Conventionally, in the shield method, a tunnel is excavated while acquiring ground information in front of the shield machine in the traveling direction or just above the shield machine.

  For example, Patent Document 1 discloses a method of measuring the strength of a natural ground directly above a shield machine by providing a jack on the upper part of the shield machine so as to be able to appear and disappear from the outer shell of the shield machine body.

  Patent Document 2 discloses a method in which a rotary percussion drill is provided inside the shield machine so as to be able to appear and move forward in the traveling direction from the cutter head, and the strength of the ground in front of the traveling direction is measured. .

  Patent Document 3 discloses a method of detecting cutting resistance by attaching a strain gauge to a cutter bit and measuring the amount of strain when drilling a face.

Japanese Utility Model Publication No. 61-17103 JP-A-10-131680 JP 2009-221802 A

  However, in each of the above-described methods, it is possible to obtain only one natural ground information of the strength of the natural ground just above the shield machine, the strength of the natural ground ahead of the traveling direction, and the cutting resistance of the natural ground. For this reason, even if excavating a self-supporting natural ground section, from a safety standpoint, it is necessary to excavate at a predetermined face pressure determined in advance by design, etc. There was a problem that the speed could not be increased.

  Therefore, the present invention has been made in view of the above problems, and can acquire ground information at a plurality of locations near the face and determine the stability of the ground based on the plurality of ground information. An object of the present invention is to provide an exploration system, a shield machine equipped with the exploration system, and an excavation method using the shield machine.

The present invention is an exploration system for exploring the stability of a natural ground near a face installed in a shield machine,
An upper exploration device installed in the upper part of the shield machine so as to be able to protrude from the outer shell of the shield machine, and measuring the penetration pressure and the penetration amount while protruding outward from the outer shell and penetrating into the natural ground. When,
In the shield machine, installed so as to be able to appear and move forward in the advancing direction from the cutter head of the shield machine, and measures the drilling energy and drilling speed while drilling the ground mountain by projecting forward from the cutter head. Possible forward exploration devices,
A cutting resistance detector installed on the cutter head and capable of measuring cutting resistance while cutting the face by rotating the cutter head; and
A determination device for determining the stability of the natural ground based on the measurement results measured by the upper exploration device, the forward exploration device, and the cutting resistance detection device;
It is characterized by providing.

According to the present invention, during the stop of the shield machine, the natural ground information such as the strength of the natural ground just above the shield machine and the strength of the natural ground ahead of the traveling direction is obtained, and the natural ground information is obtained based on the natural ground information. Stability can be determined. Furthermore, ground information such as cutting resistance is acquired while the shield machine is excavated, and the stability of the ground is more accurately determined based on this ground information and the ground information acquired while the shield machine is stopped. Can be determined.
Therefore, when it is determined that the stability of the natural ground is high while the shield machine is stopped, but after the start of excavation, it is determined that the actual stability of the natural ground is lower than the stability determined during the stop. By excavating at a predetermined face pressure determined in advance by design or the like, it is possible to dig safely.
On the other hand, even though it was determined that the stability of the natural ground was low during the stop of the shield machine, the stability of the actual natural ground was higher than the stability determined during the stop after the start of excavation, and the natural ground became independent If it is determined that the excavation is performed at a pressure lower than a predetermined face pressure determined in advance by design or the like, excavation resistance can be reduced and high-speed excavation is possible.

  In the present invention, an operator may further include a display device for displaying the measurement result measured by the upper exploration device, the forward exploration device, the cutting resistance detection device, and the determination result by the determination device. Can easily understand the situation of natural ground.

  In the present invention, a plurality of the upper exploration devices may be provided at predetermined intervals in the traveling direction of the shield machine.

  According to the present invention, the state of the natural ground can be grasped more accurately by measuring a plurality of locations in the natural ground.

  In the present invention, the predetermined interval may be substantially the same as the width of the segment.

  According to the present invention, when the predetermined interval is made substantially the same as the width of the segment, when the shield machine digs a distance corresponding to one segment, the upper exploration device also moves forward by a distance corresponding to one segment. . Therefore, after the shield machine is excavated, for example, the second upper exploration device from the front reaches the location previously measured by the first upper exploration device from the front, so that the same location can be measured again. Thereby, since the same location of a natural ground will be measured at time, the deformation of the natural ground accompanying the excavation of a shield machine can be detected.

  In the present invention, a plurality of the forward exploration devices may be provided at different height positions in the shield machine main body.

  According to the present invention, it is possible to grasp the strength of the entire surface to be excavated by drilling a plurality of locations in the ground in front of the traveling direction.

The present invention is a shield machine that digs in the ground,
An upper exploration device installed in the upper part of the shield machine so as to be able to protrude from the outer shell of the shield machine, and measuring the penetration pressure and the penetration amount while protruding outward from the outer shell and penetrating into the natural ground. When,
In the shield machine, installed so as to be able to appear and move forward in the advancing direction from the cutter head of the shield machine, and measures the drilling energy and drilling speed while drilling the ground mountain by projecting forward from the cutter head. Possible forward exploration devices,
A cutting resistance detector installed on the cutter head and capable of measuring cutting resistance while cutting the face by rotating the cutter head; and
A determination device for determining the stability of the natural ground based on the measurement results measured by the upper exploration device, the forward exploration device, and the cutting resistance detection device;
It is characterized by providing.

  The present invention may further include a display device for displaying a measurement result measured by the upper exploration device, the forward exploration device, the cutting resistance detection device, and a determination result by the determination device.

The present invention is installed in the upper part of the shield machine so as to be able to appear and disappear from the outer shell of the shield machine, and protrudes outward from the outer shell and penetrates into the natural ground while measuring the penetration pressure and the penetration amount. An exploration device and a shield machine are installed in the shield machine so as to be able to move forward and backward from the cutter head of the shield machine, and project forward from the cutter head to drill the natural ground, while drilling energy and grinding. Drilling of a shield machine provided with a forward exploration device capable of measuring a hole speed and a cutting resistance detection device that is installed on the cutter head and that can measure the cutting resistance while cutting the face by rotating the cutter head In the construction method,
While the shield machine is stopped, an intrusion step of measuring the penetration pressure and the amount of penetration while penetrating the upper exploration device directly into the natural ground directly above the shield machine, A drilling step of measuring the drilling energy and drilling speed while drilling, and determining the stability of the ground near the face based on the measurement results measured by both steps 1 determination process,
During the excavation of the shield machine, a cutting process for measuring the cutting resistance of the cutting face is performed while cutting the cutting face with the cutting resistance detection device, and measured by the penetration process, the drilling process, and the cutting process. Based on the measured results, a second determination step is performed to determine the stability of the natural ground near the face.

  According to the present invention, ground information in a plurality of locations near the face is acquired, and a survey system capable of determining the stability of the ground based on the plurality of ground information, a shield machine equipped with the survey system, and this An excavation method using a shield machine can be provided.

It is a front view of the shield machine concerning this embodiment. It is a sectional side view of the upper part of the shield machine concerning this embodiment. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. (A) is a front view showing a state in which the cutting resistance detecting device is attached to the preceding bit, (b) is a side view showing a state in which the cutting resistance detecting device is attached to the leading bit, and (c) is a leading view of the cutting resistance detecting device. It is a bottom view which shows the state attached to the bit. (A) is a top view which shows the state which attached the cutting resistance detection apparatus to the teeth bit, (b) is a front view which shows the state which attached the cutting resistance detection apparatus to the teeth bit, (c) is a cutting resistance detection apparatus attached to teeth. It is a side view which shows the state attached to the bit. It is a figure which shows the construction procedure of excavation by a shield machine. It is a figure which shows the construction procedure of excavation by a shield machine. It is a figure which shows the construction procedure of excavation by a shield machine. It is a figure which shows the construction procedure of excavation by a shield machine. It is a figure which shows the other example of arrangement | positioning of a front search apparatus. It is a figure which shows the other example of installation of a strain gauge.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

  1 and 2 are a front view and an upper side sectional view of a shield machine 1 according to the present embodiment, respectively. FIG. 3 is a cross-sectional view taken along the line AA in FIG.

  As shown in FIGS. 1 to 3, the shield machine 1 includes a cutter head 2 rotatably provided on the front side of the circular shield machine 1, a drive source 3 for driving the cutter head 2, and a cutter head. 2 and a partition wall 4, a soil removal mechanism 6 for discharging excavated sediment from the chamber 5, and an exploration system 8 for exploring the stability of the face 7.

  The exploration system 8 includes an upper exploration device 9 installed in the upper part of the shield machine 1, a forward exploration device 10 installed in the shield machine 1, a cutting resistance detection device 11 installed in the cutter head 2, and an upper part The determination device 12 for determining the stability of the natural ground E based on the measurement results measured by the exploration device 9, the forward exploration device 10 and the cutting resistance detection device 11, and the measurement of each device 9, 10, 11, 12 And a display device 13 for displaying results and determination results. Hereinafter, each of the devices 9, 10, 11, and 12 will be described.

  As shown in FIG. 2, the upper exploration device 9 can appear and disappear from the outer shell 1 a of the shield machine 1 and can penetrate into a natural mountain E located above the shield machine 1.

  The upper exploration device 9 includes a cylinder 14, a pressure gauge (not shown) for measuring the expansion / contraction pressure of the cylinder 14, and a stroke gauge (not shown) for measuring the expansion / contraction length of the cylinder 14. The intrusion pressure and the amount of intrusion into the natural ground E are measured.

  A plurality of upper exploration devices 9 (9 a to 9 b) are provided at a predetermined interval L in the traveling direction of the shield machine 1. In the present embodiment, the predetermined interval L is the same as the length of the width of one segment 21. As a result, the location where one upper exploration device 9 penetrates and after the shield machine 1 has dug a distance of one segment 21, the upper exploration device 9 adjacent to the rear of the one upper exploration device 9 penetrates. The place to do is the same. Therefore, the penetration pressure and the penetration amount at the same location of the natural ground E are measured several times over time. Thereby, it becomes possible to grasp the ground deformation above the shield machine 1.

The pressure gauges and stroke gauges of the upper exploration devices 9 a to 9 b are connected to the determination device 12 installed in the cab 22, and the results measured by the respective devices are transmitted to the determination device 12.
The determination device 12 is connected to a display device 13 such as a monitor, and the relationship between the penetration pressure and the penetration amount is displayed on the display device 13.

  4 is a cross-sectional view taken along line BB in FIG. As shown in FIG. 4, the forward exploration device 10 can appear and move forward in the traveling direction with respect to the cutter head 2, and drills a natural ground E located in front of the shield machine 1.

  In the present embodiment, a hydraulic percussion drill capable of drilling the natural ground E by striking while rotating is used as the forward exploration device 10.

  As shown in FIG. 3, the forward exploration device 10 (10 a to 10 g) is arranged on a concentric circle of a circle centering on the central axis 23 of the cutter head 2 and on the right side with respect to FIG. 3. Yes. Thereby, intensities at different depths can be measured. Therefore, it is possible to accurately grasp the strength of the natural ground E in the traveling direction.

While drilling the natural ground E with the forward exploration device 10, the natural ground E per unit volume is ground based on the impact energy, the number of impacts, the transmission efficiency, the drilling speed, the hole cross-sectional area, etc. of each forward exploration device 10. The drilling energy required for drilling is calculated by the following equation (1).
Ed = (Ep × Np × T) / (Vd × S) (1)
Here, Ed: drilling energy (J / cm ³ ), Ep: impact energy (J), Np: number of impacts (bpm), T: transmission efficiency (%), Vd: drilling speed (cm / min), S: Hole cross-sectional area (cm ² ). It should be noted that the drilling conditions such as the impact energy, the number of impacts, the transmission efficiency, and the hole cross-sectional area are determined in advance by design or the like.

  Each forward exploration device 10 measures the drilling speed while drilling the natural ground E, and calculates the drilling energy in real time.

Each forward exploration device 10 is connected to a determination device 12 installed in the cab 22, and the drilling condition data, the drilling speed, and the drilling energy value of each forward exploration device 10 are transmitted to the determination device 12. The
Further, the display device 13 connected to the determination device 12 displays the drilling conditions, the drilling speed, and the drilling energy value.

  As shown in FIG. 1, the cutter head 2 includes a central axis 23, 12 spokes 15 that are radially arranged at equal angles around the central axis 23, and a leading part attached to the central part of the spoke 15. It comprises a bit 16 and teeth bits 17 attached to both sides of the spoke 15.

  When the cutter head 2 is rotated, a tunnel having a circular cross section can be excavated by excavating the groove formed by excavating the face 7 with the preceding bit 16 with the subsequent teeth bit 17. .

FIG. 5 is a diagram showing a state in which the cutting resistance detection device 11 a is attached to the preceding bit 16.
As shown in FIG. 5, the cutting resistance detection device 11 a has a strain gauge 18 attached to the lower part of the side surfaces 16 a and 16 b of the leading bit 16, one end connected to the strain gauge 18, and the other end connected to the determination device 12. And an electric wire 19.

  The strain gauges 18 are attached to the lower portions of the side surface 16a on the front side in the rotational direction of the cutter head 2 and the side surface 16b opposite to the side surface 16a.

  The electric wire 19 is installed so as to penetrate the outer shell 15a from the surface side of the spoke 15 to the inside.

  When the cutter head 2 is rotated to bring the leading bit 16 into contact with the cutting face 7 in order to cut the cutting face 7, a reaction force acts on the leading bit 16. The reaction force causes tensile strain and compression strain in the preceding bit 16. These strain amounts are measured by the strain gauge 18, and the measurement results are transmitted to the determination device 12 through the electric wire 19.

FIG. 6 is a diagram illustrating a state in which the cutting resistance detection device 11 b is attached to the tooth bit 17.
As shown in FIG. 6, the cutting resistance detection device 11 b includes a strain gauge 25 attached to the lower end surface of the holder 20 for supporting the teeth bit 17, one end being the strain gauge 25, and the other end being the determination device 12. And a connected electric wire 26.

  Similarly to the electric wire 19, the electric wire 26 is also installed so as to penetrate the outer shell 15 a from the surface side of the spoke 15 to the inside.

  In order to cut the face 7, when the cutter head 2 is rotated to bring the teeth bit 17 into contact with the face 7, a reaction force acts on the teeth bit 17. Then, this reaction force is transmitted to the holder 20 via the pin 24. The holder 20 is distorted. The amount of strain is measured by the strain gauge 25, and the measurement result is transmitted to the determination device 12 via the electric wire 26.

  During the excavation, the determination device 12 calculates excavation resistance in real time by a well-known method based on the distortion amounts of the preceding bit 16 and the teeth bit 17.

  The determination device 12 also includes the penetration pressure and penetration amount obtained from each upper exploration device 9, the drilling condition data obtained from each forward exploration device 10, the drilling speed and the cutting rate while the shield machine 1 is stopped. The stability of the natural ground E is determined based on the hole energy value. Specifically, the intrusion pressure, penetration amount, drilling condition data, drilling speed, drilling energy value, etc. in each of the self-supporting and non-self-supporting natural rocks are acquired and stored in advance, and these measurement results and Then, the measurement results obtained from the upper exploration device 9 and the forward exploration device 10 are compared with each other to determine whether the natural ground E is independent or not as stability.

  Based on the determination result, excavation conditions such as the face pressure of the shield machine 1 and the excavation speed are set, and then excavation is started.

During the excavation, the determination device 12 always calculates excavation resistance based on the amount of distortion of the leading bit 16 and the tooth bit 17 and obtains the calculation result and the upper exploration device 9 and the forward exploration device 10 when stopped. The stability of the natural ground E is determined based on the measured result. Specifically, the distortion amounts of the leading bit 16 and the teeth bit 17 in the self-supporting ground and the non-self-supporting ground are acquired and stored in advance, and these measurement results and the leading bit 16 and the tooth acquired during the excavation are stored. Compared with the amount of distortion of the bit 17 and with reference to the measurement results obtained from the upper exploration device 9 and the forward exploration device 10 during the stop, it is more accurately determined whether or not the natural ground E during the excavation is independent. To do.
Thus, based on the determination result obtained during excavation, excavation is continued while readjustment of excavation conditions such as face pressure, added amount of mud, soil removal, excavation speed, and the like. For example, when the stability of the natural ground E is low (for example, soft ground), a predetermined face soil pressure is set, and the injection rate of the added mud material or the amount of discharged soil is adjusted. Ensure the stability of E. On the other hand, when the stability of the natural ground E is high (for example, hard ground), the face soil pressure is lowered, and the amount of added mud or the amount of discharged soil is adjusted to increase the excavation speed.

  Next, the excavation method of the shield machine 1 having the above-described configuration will be described according to the construction procedure.

7-10 is a figure which shows the construction procedure of excavation by the shield machine 1. FIG.
First, as shown in FIG. 7, while the shield machine 1 is stopped when installing the segment 21, each upper exploration device 9 (9a to 9c) penetrates into the natural ground E, and its penetration pressure and penetration amount. Implement an intrusion process to measure
The measurement result is transmitted to the determination device 12 and displayed on the display device 13 in the cab 22.

  Next, as shown in FIG. 8, while the shield machine 1 is stopped, each forward exploration device 10 (10a to 10g) is moved forward and backward from the cutter head 2 in the moving direction, and the ground E in the moving direction is cut. A drilling step for drilling is performed.

  The drilling condition data, drilling speed and drilling energy value of each forward exploration device 10 (10a to 10g) when drilling the natural ground E are transmitted to the determination device 12, and the display device in the cab 22 is displayed. 13 is displayed.

  In this embodiment, the case where the drilling process is performed after the penetration process has been described, but the present invention is not limited to this, and the penetration process may be performed after the drilling process, or both processes may be performed simultaneously. You may do it. In short, both steps may be performed while the shield machine 1 is stopped.

Next, based on the results obtained in the penetration step and the drilling step, the determination device 12 determines the stability of the ground E near the face 7 in front of the traveling direction and immediately above the shield machine 1. To implement. Specifically, it is determined whether or not the natural ground E can stand on its own.
And based on the determination result by a 1st determination process, excavation conditions, such as a face earth pressure, the addition amount of a mud material, the amount of soil removal, and excavation speed, are determined. After inputting the excavation conditions into the shield machine 1, the shield machine 1 is excavated.

Next, as shown in FIG. 9, a cutting process is performed in which the shield machine 1 is dug and the amount of strain is measured by both cutting resistance detectors 11 a and 11 b while cutting the cutting face 7 with the leading bit 16 and the teeth bit 17. carry out.
The measurement result is transmitted to the determination device 12 and displayed on the display device 13 in the cab 22.

  A determination device 12 calculates excavation resistance in real time based on the results measured by the two cutting resistance detection devices 11a and 11b, and more accurately determines the stability of the natural ground E based on the excavation resistance. A determination step is performed. Specifically, whether or not the natural ground E is independent is determined more accurately than in the first determination step.

  And based on the determination result by a 2nd discrimination | determination process, while setting the excavation speed of the shield machine 1, excavation conditions, such as a face earth pressure, the addition amount of a mud material, and the amount of soil removal, are readjusted.

  Next, as shown in FIG. 10, when the shield machine 1 travels a predetermined distance L, the excavation is stopped, and a new segment 21 d is installed in the tail portion of the shield machine 1.

Next, in consideration of the measurement result of the cutting process, each upper exploration device 9 (9a to 9c) is penetrated into the natural ground E and the penetration pressure and the penetration amount are measured in the same manner as the penetration process. At this time, the upper exploration devices 9b and 9c again measure the locations previously measured by the upper exploration devices 9a and 9b (No. 1 penetration position and No. 2 penetration position in FIG. 10), respectively, in the penetration step. It will be.
The measurement result is transmitted to the determination device 12 and further displayed on the display device 13 in the cab 22, compared with the previous measurement result, and used for determining the stability of the ground E.

  In addition, the drilling process is also performed while the shield machine 1 is stopped, and the determination device 12 determines the stability of the ground E near the face 7 based on the results obtained in the penetration process and the drilling process. The determination step 1 is performed again.

  In addition, in the last drilling step, when a distance (for example, about 30 m) longer than one excavation distance of the shield machine 1 is drilled, the shield machine 1 passes through the drilled ground section. The drilling step may be omitted during the interval.

  As described above, the penetration process and the drilling process are performed while the shield machine 1 is stopped, the first determination process is performed based on the results, and the cutting process is performed while the shield machine 1 is excavated. However, the tunnel is constructed by repeating the second determination step based on the result.

  In the present embodiment, the case where the predetermined interval L for installing the upper exploration device 9 (9a to 9c) is set to the length of one segment 21 is described. However, the present invention is not limited to this. However, it is only necessary to set the shield machine 1 to be the same as the distance traveled by one excavation.

  In the present embodiment, the forward exploration device 10 (10a to 10g) is arranged on a concentric circle centered on the central axis 23 of the cutter head 2 and only on one side of the shield machine 1, but is limited to this position. Is not to be done. For example, as shown in FIG. 11, you may install alternately on the right and left sides in the shield machine 1, and the point should just be provided in different height.

  In the present embodiment, the case where the strain gauge 25 is attached to the lower end surface of the holder 20 has been described. However, the present invention is not limited to this position, and as shown in FIG. You may attach to.

According to the shield machine 1 described above, while the shield machine 1 is stopped, ground information such as the strength of the natural ground E directly above the shield machine 1 and the strength of the natural ground E ahead in the traveling direction is acquired, and these natural grounds are obtained. The stability of the natural ground E can be determined based on the information. Further, ground information such as cutting resistance is acquired while the shield machine 1 is excavated, and the stability of the ground E is determined based on the ground information and the ground information acquired while the shield machine 1 is stopped. More accurate determination can be made.
Therefore, even though it is determined that the stability of the natural ground E is high while the shield machine 1 is stopped, it is determined that the actual stability of the natural ground E is lower than the stability determined during the stop after the start of excavation. In such a case, excavation can be performed safely by excavating at a predetermined face pressure.
On the other hand, although it is determined that the stability of the natural ground E is low while the shield machine 1 is stopped, the stability of the actual natural ground E is higher than the stability determined during the stop after the start of excavation. When it is determined that the mountain E is self-supporting, excavation is performed at a pressure lower than the face pressure determined in advance by design or the like, thereby reducing excavation resistance and enabling high-speed excavation.

  In addition, since the measurement results measured by the upper exploration device 9, the forward exploration device 10, and the cutting resistance detection device 11 are displayed on the display device 13, the worker can easily grasp the situation of the natural ground E.

  Moreover, since the determination result by the determination apparatus 12 is also displayed on the display apparatus 13, the stability of the natural ground E can be easily grasped.

  Further, by setting the predetermined interval L for arranging the upper exploration device 9 to be substantially the same as the length of the segment 21, when the shield machine 1 is dug by a distance of one segment 21, the upper exploration device 9 is also segmented. It will move forward by a distance of one of 21. Therefore, it is possible to measure the same portion of the natural ground E directly above the shield machine 1 a plurality of times. Thereby, since the same location will be measured at time, the deformation of the natural ground E accompanying the excavation of the shield machine 1 can be detected.

  Moreover, the intensity | strength of the whole excavation target surface can be grasped | ascertained by drilling several places of the natural ground E ahead of the advancing direction with the front exploration apparatus 10. FIG.

  Moreover, since the measurement result of a cutting process can be reflected in the measurement result in the next penetration process and drilling process, the precision of these measurement results can be improved.

  In the present embodiment, the case where the determination device 12 determines the stability of the natural ground E has been described. However, the present invention is not limited to this, and a human may determine the stability.

DESCRIPTION OF SYMBOLS 1 Shield machine 1a Outer shell 2 Cutter head 3 Drive source 4 Bulkhead 5 Chamber 6 Earth removal mechanism 7 Face 8 Exploration system 9 Upper exploration device 9a-9c Each upper exploration device 10 Forward exploration device 10a-10g Each forward exploration device 11 Cutting resistance Detection device 11a, 11b Each cutting resistance detection device 12 Judgment device 13 Display device 14 Cylinder 15 Spoke 15a Outer shell 16 Leading bit 16a, 16b Side surface 17 Teeth bit 17a Side surface 18 Strain gauge 19 Electric wire 20 Holder 21 Segments 21a-21d Each segment 22 Driver's cab 23 Rotating shaft 24 Pin 25 Strain gauge 26 Electric wire E Jiyama

Claims (8)

An exploration system installed on a shield machine for exploring the stability of natural ground near the face,
An upper exploration device installed in the upper part of the shield machine so as to be able to protrude from the outer shell of the shield machine, and measuring the penetration pressure and the penetration amount while protruding outward from the outer shell and penetrating into the natural ground. When,
In the shield machine, installed so as to be able to appear and move forward in the advancing direction from the cutter head of the shield machine, and measures the drilling energy and drilling speed while drilling the ground mountain by projecting forward from the cutter head. Possible forward exploration devices,
A cutting resistance detector installed on the cutter head and capable of measuring cutting resistance while cutting the face by rotating the cutter head; and
A determination device for determining the stability of the natural ground based on the measurement results measured by the upper exploration device, the forward exploration device, and the cutting resistance detection device;
An exploration system comprising:   The display device for displaying a measurement result measured by the upper exploration device, the forward exploration device, the cutting resistance detection device, and a determination result by the determination device. Exploration system.   The exploration system according to claim 1, wherein a plurality of the upper exploration devices are provided at predetermined intervals in the traveling direction of the shield machine.   The search system according to claim 3, wherein the predetermined interval is substantially the same as a width of a segment.   The search system according to claim 1, wherein a plurality of the forward search devices are provided at different height positions in the shield machine main body. A shield machine that digs in the ground,
An upper exploration device installed in the upper part of the shield machine so as to be able to protrude from the outer shell of the shield machine, and measuring the penetration pressure and the penetration amount while protruding outward from the outer shell and penetrating into the natural ground. When,
In the shield machine, installed so as to be able to appear and move forward in the advancing direction from the cutter head of the shield machine, and measures the drilling energy and drilling speed while drilling the ground mountain by projecting forward from the cutter head. Possible forward exploration devices,
A cutting resistance detector installed on the cutter head and capable of measuring cutting resistance while cutting the face by rotating the cutter head; and
A determination device for determining the stability of the natural ground based on the measurement results measured by the upper exploration device, the forward exploration device, and the cutting resistance detection device;
A shielding machine comprising:   The display device for displaying a measurement result measured by the upper exploration device, the forward exploration device, the cutting resistance detection device, and a determination result by the determination device. Shield machine. An upper exploration device installed in the upper part of the shield machine so as to be able to protrude from the outer shell of the shield machine, projecting outward from the outer shell and penetrating into the natural ground, and measuring its penetration pressure and penetration amount; In the shield machine, installed so as to be able to appear and move forward in the advancing direction from the cutter head of the shield machine, and measures the drilling energy and drilling speed while drilling the ground mountain by projecting forward from the cutter head. In a digging method for a shield machine, comprising a possible forward exploration device, and a cutting resistance detection device that is installed in the cutter head and rotates the cutter head to cut the face while measuring cutting resistance.
While the shield machine is stopped, an intrusion step of measuring the penetration pressure and the amount of penetration while penetrating the upper exploration device directly into the natural ground directly above the shield machine, A drilling step of measuring the drilling energy and drilling speed while drilling, and determining the stability of the ground near the face based on the measurement results measured by both steps 1 determination process,
During the excavation of the shield machine, a cutting process for measuring the cutting resistance of the cutting face is performed while cutting the cutting face with the cutting resistance detection device, and measured by the penetration process, the drilling process, and the cutting process. A shield machine excavation method, wherein a second determination step of determining the stability of the ground near the face is performed based on the measurement result.

Images