Overexcavation management system, method and program

Abstract

To provide a system, a method, and a program by which a shield operator can easily evaluate overbreak.SOLUTION: An overbreak management system comprises an acquisition unit 50 for acquiring trace-recorded accumulated information regarding a circumference angle θ position of a copy cutter of a shield, a projection length setting ΔR, and a shield position and attitude, a display control unit 51 for displaying a display model of the shield placed in the above attitude and an overbreak trajectory of the copy cutter based on the acquired accumulated information, and an evaluation unit 52 that evaluates excess or deficiency of overbreak based on the acquired accumulated information. The display control unit 51 displays the displayed display model in association with the evaluation result of the evaluation unit 52.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a system and method for managing overcutting, and a program for causing a computer to execute processing for realizing the method. [Background technology]

[0002] In general, when excavating natural ground in civil engineering works, including when tunnels are excavated using excavation machines (shields), excavation performance is evaluated from time to time to determine whether the excavation is proceeding as designed. Data for evaluating excavation performance can be obtained by manual measurement, but manual measurement takes time, and more measurement points are required for accurate measurement. Furthermore, to evaluate excavation performance, the data obtained at each measurement point must be compared with the design data point by point.

[0003] Therefore, current shape data is acquired by current shape data acquisition means such as a video camera, and compared with stored design shape data to create construction status management information consisting of the degree of agreement between the design shape data and the current shape data. Furthermore, a technology has been proposed in which the construction status management information is projected by projection means such as a projector onto the excavation site itself under the direct observation of the excavation worker so that the construction status management information can be fed back to the excavation worker in an easy-to-understand manner (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-117146 Summary of the Invention [Problem to be solved by the invention]

[0005] In the above-mentioned conventional technology, construction status management information is projected onto the excavation site and communicated to the excavation worker, but in the case of a shield, the excavation site is located on the back of the shield body and is covered with excavated soil, improvement agents, etc., so excavation cannot be performed under the direct observation of the shield operator in the first place, and construction status management information cannot be projected onto the excavation site. [Means for solving the problem]

[0006] The present invention has been made in consideration of the above problems, and is a system for managing overexcavation, an acquisition means for acquiring accumulated information tracked and recorded regarding the projection length of a projection portion that projects radially from the tip of the tunnel to overexcavate the tunnel and the attitude of the excavation machine; a display control means for displaying a display model of the excavation machine placed in the attitude and an over-excavation trajectory of the excavation machine based on the acquired stored information; Based on the accumulated information acquired, it is an evaluation method to evaluate whether overexcavation is excessive or insufficient. Including, The display control means displays the evaluation result of the evaluation means in association with the displayed display model, thereby providing an overexcavation management system. [Effects of the Invention]

[0007] The present invention allows the shield operator to easily assess overcutting. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 10 is a diagram showing an example of a shield configuration. [Figure 2] A diagram illustrating the center-bend shield and posture on sharp curves. [Figure 3] FIG. 10 is a diagram showing an example of a display of conventional overexcavation results. [Figure 4] A diagram showing the shield comprehensive management system to which the overexcavation management system is applied. [Figure 5] FIG. 1 is a diagram illustrating the hardware configuration of an overexcavation management system. [Figure 6] FIG. 2 is a diagram showing an example of the functional configuration of an overexcavation management system. [Figure 7] A figure showing an example of the overexcavation results displayed by this system. [Figure 8] A diagram showing an example of mapping the excess or deficiency of overexcavation onto a display model. [Figure 9] 1 is a flowchart showing an example of a tunnel construction procedure. DETAILED DESCRIPTION OF THE INVENTION

[0009] The overexcavation management system of the present invention is a system that enables a shield operator to easily understand the excavation results of overexcavation, which is particularly important in sharp curved sections of a tunnel when excavating a tunnel using the shield method, even when the shield operator is not directly observing it.

[0010] A shield is a tunnel boring machine that cuts away soil in front of it, holds down the excavation surface that is about to collapse, and moves forward by discharging an amount of excavated soil outside the tunnel that balances the amount cut away. Behind the shield, tunnel lining blocks called segments are assembled into a ring shape to complete the tunnel structure. Figure 1 shows an example of the configuration of a shield.

[0011] The shield 10 has a cutter head 11 at its tip, which is equipped with a plurality of bits arranged circumferentially or radially on a rotatable, approximately circular face plate, in order to cut away soil and sand in front of it. The shield 10 also has a shield jack 12, which is installed by pressing the shield jack 12 against the assembled segments 13, and moves forward by extending the shield jack 12. Note that multiple shield jacks 12 are arranged at predetermined intervals along the inner periphery of a skin plate 14, which is a steel outer cylinder that constitutes the shield 10.

[0012] The shield 10 is provided with a chamber 15 immediately behind the cutter head 11 as a mixing chamber for applying earth pressure and water pressure to the excavated surface and plastically fluidizing the excavated soil so that it can be discharged. The soil and sand in the chamber 15 is removed by a screw conveyor 16 and carried out of the mine by a belt conveyor 17 to be disposed of as discharged soil.

[0013] The shield 10 is equipped with an erector 18 for assembling the segments. The erector 18 grasps the segments and transports them to the designated position to install them. The shield 10 also has a backfill injection device 19 that injects grout into the back of the segments 13 (between the segments and the excavated tunnel wall).

[0014] The development of complex underground urban spaces requires the excavation of three-dimensional sharp curves. For this reason, the mechanical structure of shield tunnels has evolved to accommodate sharp curves, and as shown in Figure 2, many shield tunnels are equipped with a center-bending mechanism that allows the tunnel to bend midway between two separate cylindrical halves, a front body 20 and a rear body 21, connected by a hinge, as shown in Figure 2. Figure 2 also shows a segment ring 22 assembled using the shield.

[0015] When a shield with a bending mechanism turns a sharp curve, the direction of the rear body and the bending angle are manipulated to adjust the shield's posture while turning so that it moves along the excavation direction that minimizes the deviation between the shield and the planned line.

[0016] When making a sharp curve, for example, in the case of a bus or truck, a space greater than the width of the vehicle is required to allow for the difference in inner wheels and the overhang from the center of rotation. A shield road also requires a similar space expanded from the excavation diameter of the straight section in order to make a curve, but there is a restriction that it cannot be made into a curve unless that space is created by excavating extra space itself.

[0017] A copy cutter (hereinafter referred to as a copy for short) 23 is provided on the side of the cutter head provided on the front body 20 of the shield as a protrusion that can protrude in the radial direction of the tunnel. The copy 23 is a device for creating a space in which the shield can be curved.

[0018] When the shield makes a sharp curve, the jacks are operated to retract the bending jack on the inside of the curve and extend the bending jack on the outside, causing the shield to curve in a U-shaped bend. The space in which this position can be assumed must be predicted in advance, and excavation must be carried out when Copy 23 is in that position. This operation is called over-excavation.

[0019] Overexcavated spaces are not considered cavities. If they remain cavities, there is a risk of the excavation wall collapsing, and it becomes difficult for the shield to adequately withstand the reaction force and friction from the excavation wall, making shield operation difficult. Overexcavated spaces are filled immediately after excavation with an improvement agent with appropriate plastic fluidity. This protects the excavation wall and allows the shield to withstand the ground reaction force and friction from the excavation wall, allowing for optimal shield operation.

[0020] During shield operation, the entry and exit of the copy 23 is continuously controlled in accordance with the rotation angle of the cutter head. Because this is a cumbersome task, it is performed automatically rather than manually. Specifically, by turning on the overexcavation operation mode, the shield automatically excavates the overexcavation space according to an equation that indicates the relationship between the circumferential angle θ and the protrusion length ΔR of the copy 23, which is preset in the controller.

[0021] Even if the amount of overexcavation (the protruding length of copy 23) is properly estimated in the curve design, the effectiveness of copy cutting, which cannot be accurately grasped as a given design condition, and the influence of the mechanical interaction between the excavation surface and the shield may cause the shield posture to not change as expected, and the deviation from the planned line may not be reduced.

[0022] In such cases, the shield operator must adjust the shield's posture, the amount of overexcavation, etc., and see if the adjustments are successful. However, when multiple adjustments are made in succession, it becomes difficult to see how effective the current overexcavation is. Therefore, there was a need for a system that could clearly show the shield operator the effectiveness of the overexcavation, which changes in real time.

[0023] Conventionally, the method of showing overcutting performance has been to record the setting ΔR of the extension length of copy 23 corresponding to shield excavation position X and manage it using an X-ΔR graph (a graph showing the relationship between X and ΔR). ΔR is also corrected based on changes in the shield position and posture after overcutting. Furthermore, ΔR is also corrected based on the effectiveness of overcutting (the ratio of the actual excavated depth to the setting of the extension length of copy 23).

[0024] Depending on the nature of the ground, the depth that the copy 23 can actually cut may not necessarily be equal to the set ΔR of the protrusion length of the copy 23. In this case, after cutting with the copy 23, the shape of the over-excavation can be confirmed using a tactile probe installed adjacent to the copy 23.

[0025] The information obtained in this way is displayed on the shield operator's monitoring dashboard. Figure 3 shows an example of an X-ΔR graph. Figure 3 includes X-ΔR graphs for two overcut zones, labeled (1) and (3) in the circumferential direction of the shield rotation. Zone (2) is unused in the program. The vertical axis of the graph is ΔR, and two values ​​are shown: the extension length setting of copy 23 and the shape of the overcut measured with the palpator probe. The horizontal axis of the graph is the location (in tunnel distance) where the overcut was performed.

[0026] Figure 3 shows a situation in which the settings for the projection length of copy 23 in zones (1) and (3) are almost constant, while the shape of the overexcavation varies depending on X. From such a graph, the effectiveness of the settings for the projection length of copy 23 can be evaluated and the settings for the projection length of copy 23 can be corrected to a more suitable value.

[0027] However, the graph shown in Figure 3 does not allow intuitive reading of where on the outer surface of the shield body there is excess or insufficient overexcavation. It is difficult to immediately read where on the outer surface of the shield body there is overexcavation that will need to be corrected in the future, or what the shield posture is possible with the current overexcavation space.

[0028] Before shield tunneling was required to handle sharp curves, there was not much need to evaluate the effectiveness of overcutting excavation in response to the constantly changing position and posture of the shield. Achieving this required a considerable amount of resources and effort, and no particular consideration had been given to making it easy for shield operators to understand.

[0029] The present invention provides an evaluation system for overexcavation that is easy for shield operators to understand. First, with reference to Figure 4, we will explain the comprehensive shield management system to which this system, the overexcavation management system, is applied. The comprehensive shield management system 30 is a base system that accumulates information as a comprehensive database related to shield excavation and provides functions such as basic statistical analysis and risk assessment. The comprehensive shield management system 30 can be equipped with an application 31 for expanding its functions. The overexcavation management system 32 can be equipped in the comprehensive shield management system 30 as one of the applications. Note that this is just one example, and the method of implementing some or all of the functions of the overexcavation management system is not limited to this.

[0030] The shield comprehensive management system 30 is connected to the shield and related plants 33 via an operation system IF 34, a basic operation panel 35, and a detailed operation panel 36. The shield comprehensive management system 30 holds information on the excavation plan line, and acquires information on the stroke and angle of the copy 23, information on the shield's attitude and position, information on the center bending angle, etc. from various sensors etc. attached to the shield and related plants 33. The shield comprehensive management system 30 is also connected to various environmental measurement devices 37 that measure environmental information such as ground displacement, and acquires environmental information such as ground displacement from the various environmental measurement devices 37.

[0031] The overexcavation management system 32 uses the acquired information to calculate the overexcavation trajectory of the copy 23 and whether the overexcavation is excessive or insufficient. The overexcavation management system 32 then maps and displays the location and extent of the overexcavation or insufficiency on the outer surface of the display model of the shield, along with the time series changes shown in Figure 3. By displaying the shield as a display model in this way and mapping the location and extent of the overexcavation or insufficiency, the shield operator can instantly read where on the outer surface of the shield's body the overexcavation that will need to be corrected in the future is located, and what the shield position is possible within the current overexcavation space.

[0032] 5 is a diagram showing an example of the hardware configuration of the shield integrated management system 30. The shield integrated management system 30 can be configured using a general-purpose computer. Therefore, the shield integrated management system 30 can employ the same hardware configuration as a general-purpose computer. The shield integrated management system 30 includes, as hardware, a CPU (Central Processing Unit) 40, a ROM (Read Only Memory) 41, a RAM (Random Access Memory) 42, an HDD (Hard Disk Drive) 43, an external device I / F 44, an input / output I / F 45, a display device 46, and an input device 47.

[0033] The CPU 40 controls the entire system and executes various applications. The ROM 41 stores firmware that controls the BIOS (Basic Input / Output System), which loads the OS (Operating System) when the system starts up and controls input / output for peripheral devices, and controls the circuits inside the system, such as the HDD 43. The RAM 42 is used as main memory and provides a working area for the CPU 40. The HDD 43 stores various applications and OSs executed by the CPU 40, various setting information, various data, and the like. Although the HDD 43 is used here, the present invention is not limited to this and may be a storage device such as an SSD (Solid State Drive).

[0034] The external device I / F 44 connects this system to external devices such as the basic operation panel 35, the detailed operation panel 36, and various environmental measuring devices 37, and controls communication with the external devices. The display device 46 is a device for displaying information, such as a liquid crystal display or an organic EL (Electro Luminescence) display. The input device 47 is a device for inputting information using a keyboard or mouse, selecting applications, and issuing instructions to run applications. The input / output I / F 45 controls the output of information to the display device 46 and the input of information from the input device 47. In this example, the display device 46 and the input device 47 have been described as separate devices, but this is not limiting, and a touch panel having the functions of both the display device 46 and the input device 47 may also be used.

[0035] The shield comprehensive management system 30 may also be equipped with other circuits, such as a communication I / F that connects to a network such as the Internet and controls communication with communication devices on the network, or a short-range wireless communication circuit that enables short-range wireless communication using Bluetooth (registered trademark) or the like.

[0036] Figure 6 is a functional block diagram showing an example of the functional configuration of the overexcavation management system 32. Each function of the overexcavation management system 32 is realized by the CPU 40 executing an application provided in the shield comprehensive management system 30. Note that some or all of the functions of the overexcavation management system 32 may be configured using hardware such as circuits.

[0037] The overexcavation management system 32 has, as its functional parts, an acquisition unit 50 for acquiring specified information from the information acquired and recorded by the shield comprehensive management system 30 from the shield and related plants 33, various environmental measuring devices 37, etc., a display control unit 51 for controlling the display of information on the display device 46, and an evaluation unit 52 for evaluating whether the overexcavation is excessive or insufficient.

[0038] The acquisition unit 50 acquires predetermined information, such as the setting of the projection length of the copy 23, the overcut shape, the position of the shield, and the accumulated information that has been tracked and recorded, from the information recorded by the shield comprehensive management system 30. The information about the shield posture includes the face orientation of the rear body of the shield, the center bending angle, etc., and is information for determining the posture of the shield.

[0039] The display control unit 51 displays a display model of the shield placed in that posture and the over-excavation trajectory of the copy 23 based on the accumulated information acquired by the acquisition unit 50. The display model is a three-dimensional model created using CAD (Computer Aided Design) or the like. The over-excavation trajectory of the copy 23 is a trace that the copy 23 has traveled while excavating, represented by a curve or the like.

[0040] The shield and related plant 33 and various environmental measuring devices 37 acquire necessary data during shield excavation, send it to the shield comprehensive management system 30, and store it with the same time stamp. The necessary data includes the setting of the projection length of the copy 23, the position of the shield, the orientation of the rear body as information on the shield posture, the center bending angle, etc.

[0041] The acquisition unit 50 reads and acquires the tracked and recorded accumulated information each time the shield excavates a predetermined distance, and the display control unit 51 updates the display of the overexcavation trajectory on the copy 23. Every time the shield excavates a predetermined distance means, for example, every time the shield excavates an amount sufficient to construct one segment ring. Note that this is just an example, and the predetermined distance is not limited to this distance.

[0042] The evaluation unit 52 evaluates whether the overexcavation is excessive or insufficient based on the accumulated information acquired by the acquisition unit 50. Specifically, the evaluation unit 52 calculates the amount by which the display model protrudes from the line representing the overexcavation trajectory for the overlapping portion of the display model and the overexcavation trajectory displayed by the display control unit 51, compares the protruding amount with the protruding length of the copy 23 protruded for overexcavation in that portion, and evaluates whether the overexcavation is excessive or insufficient.

[0043] The evaluation of overexcavation can be performed by determining whether the overexcavation is appropriate, excessive, or insufficient. Appropriateness can be determined by whether the actual amount of overexcavation is within the allowable value. The actual amount of overexcavation can be determined by measuring the stroke of copy 23 or by pressing a feeler rod against the ground.

[0044] If the overexcavation is appropriate, the alignment can be maintained with a good balance. On the other hand, if there is too much overexcavation, the ground reaction force is small, and if there is insufficient overexcavation, the ground reaction force is large, and in either case the alignment will deviate, and the posture will not change as expected and the curve will not be formed. Such overexcavation or insufficient overexcavation can be judged simply by whether it exceeds the upper limit or falls below the lower limit of the appropriate range, but it is also possible to set a further range and evaluate the degree of excess or insufficiency.

[0045] The display control unit 51 displays the evaluation results of the evaluation unit 52 in association with (mapped to) the displayed display model and overexcavation trajectory. Since the evaluation unit 52 can perform evaluation at least at three levels, namely, appropriate overexcavation, excessive overexcavation, and insufficient overexcavation, the display control unit 51 can map and display the evaluation results at the three levels on the display model, etc.

[0046] The display control unit 51 can distinguish between appropriate overexcavation, excessive overexcavation, and insufficient overexcavation, for example, by color. Specifically, the display model can display appropriate overexcavation parts in white, excessive overexcavation parts in red, and insufficient overexcavation parts in blue. This makes it possible to display which parts of the shield tunnel axis direction are excessively overexcavated or insufficiently overexcavated.

[0047] If the display model is a CAD model created by CAD, it can be displayed from any direction, and a cross section cut at any position can also be displayed. Therefore, the evaluation results of the evaluation unit 52 can be displayed as a map on the cross section cut at any position, and it can be shown which parts of the tunnel cross section in the circumferential direction are overexcavated or underexcavated.

[0048] Figure 7 is a diagram showing an example of an overexcavation performance display displayed on the display device 46 by the display control unit 51. In addition to displaying the face position and excavation section, the screen shown in Figure 7 displays, in the upper right corner, each overexcavation level color-coded, a three-dimensional model 60 as a display model and an overexcavation trajectory 61. Also, in the lower part, cross-sectional views cut at three positions A to C, which are arbitrary positions in the three-dimensional model 60, are displayed with each level color-coded.

[0049] The three-dimensional model 60 shown in the upper right is a three-dimensional model of a shield tunnel equipped with a bending mechanism for tunneling through a sharp curve. In this figure, the shield tunnel is tunneling toward the right, and a bending mechanism 60c is provided between the front and rear trunks 60a and 60b, which are equipped with cutterheads. Due to the curve of the shield, the rear trunk 60b of the shield protrudes beyond the dashed line indicating the overexcavation trajectory 61 of the front trunk 60a to the inside of the curve, resulting in insufficient overexcavation on the inside of the rear trunk 60b. Conversely, the outer part of the rear trunk 60b has excessive overexcavation.

[0050] The cross section taken along cutting line AA shown below is the cross section of the rear body 60b, the cross section taken along cutting line BB is the cross section of the portion having the center-bending mechanism 60c, and the cross section taken along cutting line CC is the cross section of the front body 60a. The cross section of the front body 60a taken along cutting line CC nearly coincides with the overcutting trajectory 61 and is therefore within the appropriate overcutting range. However, the cross section of the rear body 60b extends beyond the overcutting trajectory 61, and therefore the overcutting portion is insufficient overcutting.

[0051] By displaying the evaluation results of overexcavation in different colors in this way, the shield operator can easily understand which locations are overexcavated or insufficient. Also, by color-coding the degree of overexcavation and displaying it as a contour map (isoline map), the shield operator can easily understand the extent of the overexcavation or insufficiency.

[0052] Figure 8 shows another example of displaying the evaluation results of overexcavation. By color-coding the outer skin of the shield display model and indicating its location as shown in Figure 7, the shield operator can grasp the location and extent of the overexcavation at a glance. The shield advances while rotating in a fixed direction. Therefore, the trajectory of copy 23, which moves in and out due to the operation of the center-folding jack, forms a spiral on the outer periphery of the front of the advancing shield. In the example shown in Figure 7, if area 1 has adequate overexcavation but the surrounding areas have excessive overexcavation, the area including area 1 is deemed to be overexcavation and is displayed in a different color.

[0053] Therefore, in order to reflect the evaluation results in more detail, the copy 23 is discretized and displayed in tiles according to the spiral trajectory 62, as shown in Figure 8. By displaying each tile 63 in a different color according to the excess or deficiency of overexcavation, the location and degree of excess or deficiency can be shown in more detail. In Figure 8, the outer periphery of the overexcavation is the natural ground excavation surface 64.

[0054] The shield comprehensive management system 30 tracks and records, with timestamps, information about the position of the circumference angle θ and the projection length setting ΔR of the copy 23, and the shield position and posture, so it is possible to know at what time the copy 23 is located, how far it is projected, and the position and posture of the shield 10 at that time. For this reason, this information with the same timestamp is organized into a set of data, and by using this data set, it is possible to evaluate whether the overexcavation of each tile 63 is excessive or insufficient when the trajectory 62 of the copy 23 is discretized into tiles, and display the results in different colors.

[0055] The trajectory of the copy 23 can be discretized by dividing it into sections at a fixed distance, but it may also be discretized by dividing it into sections at a fixed time.

[0056] The construction procedure for a sharply curved section of a tunnel will be described with reference to Figure 9. Until the sharply curved section of the tunnel is reached, the tunnel is excavated using a shield along straight sections or gently curved sections. In step 100, the planned line (design) is referenced, and in step 101, the excavation line (actual results) is confirmed. The excavation line is a line that shows the trajectory of a given point on the shield as it excavates the tunnel.

[0057] In step 102, the difference between the planned line and the excavation line is taken as the deviation, and this deviation is evaluated. If the deviation is increasing, a correction line is prepared to reduce the deviation. The correction line is a line that shows how to advance the shield, which has deviated from the planned line, and return it to its trajectory on the planned line. In order to advance the shield toward the sharp curve, it is necessary to extend the copy 23 and overexcavate a space in which the shield can assume the required position. Since the amount of overexcavation varies depending on R (the radius of the circle), which represents the size of the curve in the sharp curve, in step 103 an overexcavation target is prepared according to R determined by the planned line. The overexcavation target is a set value for the amount of overexcavation.

[0058] In step 104, the overexcavation target is loaded into the controller that controls the shield. That is, the set value for the amount of overexcavation is sent to the controller and set in the controller. In step 105, the overexcavation mode is turned on and excavation begins. In step 106, the copy 23 is automatically controlled according to the overexcavation target loaded into the controller to begin excavation.

[0059] While the copy 23 moves in and out automatically and the shield advances, the projection length of the copy 23 and information on the shield's posture are simultaneously measured at regular time intervals and recorded in steps 107 and 108. At this time, the position information of the shield is also recorded.

[0060] The shield excavation can be temporarily stopped when it has traveled a predetermined distance, for example, when construction of one segment ring is completed. In step 109, the shield excavation is temporarily stopped.

[0061] From here on, processing by the overexcavation management system begins, and in step 110, the shield trajectory and posture are illustrated. That is, the acquisition unit 50 acquires information about the position of the circular angle θ and the projection length setting ΔR of the recorded copy 23, as well as the shield position and posture. Then, based on the information about the position and posture, the display control unit 51 displays a display model of the shield and the overexcavation trajectory as shown in Figure 6. At this stage, the display model is not color-coded.

[0062] In step 111, the evaluation unit 52 evaluates whether the over-excavation is excessive or insufficient based on information related to the protrusion length. The evaluation unit 52 compares the amount by which the display model protrudes from the line indicating the over-excavation trajectory with the protrusion length setting ΔR, and evaluates whether the over-excavation is appropriate, excessive, or insufficient. In step 112, the display control unit 51 reflects the evaluation result of the evaluation unit 52 in the display model and over-excavation trajectory that have already been displayed. Specifically, the evaluation result is color-coded and mapped and displayed on the display model.

[0063] In step 113, the shield operator checks the display model mapped and displayed on the display device, and determines whether or not corrections are necessary. If it is determined that corrections are necessary, the process returns to step 103, and the overexcavation target is reset. On the other hand, if it is determined that corrections are not necessary, the process returns to step 105, and the next excavation begins. This process is carried out until excavation of the sharp curve section is completed. In straight sections and gently curved sections of the tunnel, overexcavation is often not necessary, so this process does not need to be carried out. Whether or not to carry out this process can be determined by checking the current position of the shield on the planned line and determining whether or not it is entering a sharp curve section.

[0064] As explained above, it is possible to easily evaluate whether overexcavation is excessive or insufficient, and by displaying this information in a color-coded manner, the shield operator can intuitively grasp the current state and history of overexcavation while excavating. This allows the operator to make appropriate corrections and carry out construction, improving the construction quality of sharp curves.

[0065] The overexcavation management system, method and program of the present invention have been described in detail above with reference to the embodiments shown in the drawings, but the present invention is not limited to the above-described embodiments and can be modified within the scope of what a person skilled in the art can conceive, such as other embodiments, additions, modifications and deletions, and any aspect is within the scope of the present invention as long as it achieves the functions and effects of the present invention. [Explanation of symbols]

[0066] 10...Shield 11...Cutter head 12...Shield jack 13...segments 14...Skin plate 15...Chamber 16...Screw conveyor 17...Conveyor belt 18...Erector 19...Backfill injection device 20, 21...torso 22...Segment ring 23...Copy 30...Shield comprehensive management system 31...Application 32...Excess excavation management system 33...Shield and related plants 34...Operation system I / F 35…Basic operation panel 36…Detailed operation panel 37...Various environmental measuring devices 40...CPU 41...ROM 42...RAM 43...HDD 44...Connection I / F 45...Input / output interface 46…Display device 47...Input device 50…Acquisition part 51...Display control unit 52...Evaluation Department 60...3D model 60a...Front body 60b…back torso 60c...Bending mechanism 61...Excessive excavation track 62…Trajectory 63...Tile 64...Excavation surface of natural ground

Claims

1. A system for managing overcutting, comprising: an acquisition means for acquiring accumulated information tracked and recorded regarding the projection length of a projection portion at the tip of a tunnel drilling machine that rotates to excavate the tunnel by projecting the projection portion in the radial direction of the tunnel to perform over-excavation, and the attitude of the tunnel drilling machine; a display control means for displaying an overlapping display model of the excavation machine arranged in the attitude and an over-excavation trajectory of the protruding portion in the tunnel axial direction based on the acquired accumulated information; an evaluation means for evaluating whether the overexcavation in the tunnel axial direction is excessive or insufficient based on the acquired accumulated information; Including, the display control means displays the evaluation result of the evaluation means in association with the displayed display model; The evaluation means compares the amount by which the display model extends beyond the overexcavation trajectory with the protrusion length, and evaluates whether the overexcavation is appropriate, excessive, or insufficient depending on the comparison result.

2. 2. The overexcavation management system according to claim 1, wherein the evaluation means determines whether the overexcavation is appropriate based on whether the actual overexcavation amount is within an allowable value.

3. The overexcavation management system according to claim 1 or 2, wherein the display control means displays the evaluation results in different colors depending on the evaluation results.

4. the acquiring means acquires the accumulated information every time the excavating machine advances a certain distance, The overexcavation management system according to any one of claims 1 to 3, wherein the display control means updates the attitude and overexcavation trajectory of the display model.

5. The overexcavation management system according to any one of claims 1 to 4, wherein the display control means displays the evaluation results in association with a cross-sectional view obtained by cutting the display model at a predetermined position.

6. The display control means discretizes the trajectory of the protrusion obtained from the accumulated information, displays the discretized parts as rectangles, and displays the evaluation results of the evaluation means for each discretized part in correspondence with each rectangle. An overexcavation management system as described in any one of claims 1 to 5.

7. The accumulated information tracked and recorded regarding the posture is the bending angle when the excavation machine has a bending mechanism, and the orientation of the rear body connected to the rear of the bending mechanism. An over-excavation management system as described in any one of claims 1 to 6.

8. A method performed by an overbreak management system, comprising: a step of acquiring accumulated information tracked and recorded regarding the projection length of a projection portion that projects radially from the tip of a tunnel to perform over-excavation at the tip of the excavating machine, the tip of which rotates to excavate the tunnel, and the attitude of the excavating machine; a step of displaying an overlapping display model of the excavation machine arranged in the attitude and an over-excavation trajectory of the protruding portion in the tunnel axial direction based on the acquired accumulated information; A step of evaluating whether the overexcavation in the tunnel axial direction is excessive or insufficient based on the acquired accumulated information; a step of displaying the evaluation result in the evaluating step in association with the displayed display model; Including, In the evaluating step, the amount by which the display model protrudes from the overexcavation trajectory is compared with the protrusion length, and depending on the comparison result, it is evaluated whether the overexcavation is appropriate, excessive, or insufficient.

9. A program for causing a computer to execute each step included in the method according to claim 8.

Images