JPH0771192A - Extra drilling amount control device for shield type tunnel drilling machine - Google Patents

Abstract

PURPOSE:To ensure drilling control without giving a too much extra drilling amount to a shield type tunnel drilling machine when constructing a curved tunnel. CONSTITUTION:By a computer used to set a given extra drilling amount, whether a drilling track line 7 and a drilling machine drawing outline 4 contact each other when a drilling machine position is moved forward on a display is judged. If they contact, the drilling machine position is moved backward on the display and moved forward after the extra drilling amount is reset, to make sure that the contact can be dissolved. In such a simulation, the set value of the extra drilling amount in an area where the drilling machine drawing outline 4 passes through without contact is called out of a memory and output to an extra drilling cutter drive unit as an extra drilling amount for a real drilling machine.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides an excavation amount control for a shield type tunnel excavator in which a rotating cutter wheel is provided in front of a main body of an excavator, and an extra excavation cutter is provided so as to be able to move forward and backward from the cutter wheel. It relates to the device.

[0002]

2. Description of the Related Art In a conventional shield tunnel excavator, the outer shell of the excavator body has a straight cylindrical shape. Therefore, if a tunnel having the same size as the outer shell diameter is excavated, it can go straight, but it is a curved tunnel. Can not be dug. In order to solve this, by mounting a digging cutter that can move forward and backward to the spokes of the cutter wheel, the tunnel cross section is expanded laterally by moving the digging cutter forward and backward in synchronization with the rotation of the cutter wheel, This makes it possible to advance the straight cylindrical excavator body along a curved excavation planned line.

[0003]

The position for advancing and retracting the above-mentioned overcutting cutter, that is, the amount of overcutting, has conventionally been empirically determined by the builder, but when the amount of overcutting is insufficient, the excavator main body The outer surface hits the inner wall of the excavated tunnel, that is, the ground wall surface, and it becomes impossible to move forward as if it were caught in the ground. In order to prevent such troubles, it is the actual situation that the amount of excess digging is set larger than necessary to proceed with the digging. However, since the amount of excavated sand directly affects the efficiency and cost of tunnel excavation work, it is natural that it should be as small as possible. Therefore, if it is possible to set the excess excavation amount to the necessary limit, The efficiency and cost of can be improved. It is inevitable that the excess digging amount is set to some extent, as described above, depending on the experience and intuition as in the conventional case.

The present invention has been made in view of the above points, and an object of the present invention is to ensure that when a curved tunnel is constructed by a shield tunnel excavator, the excavation can be carried out without causing an excessive amount of excess excavation. The present invention is to provide a device for controlling an overburden amount.

[0005]

In order to achieve the above object, the present invention provides a shield wheel provided with a rotating cutter wheel on the front face of an excavator main body, and an excess excavator cutter capable of advancing and retracting laterally from the cutter wheel. In the control device for excess amount of excavation of a tunnel type tunnel machine, means for inputting each data of the excavation plan line, dimensions of the excavator and relative position to the excavation plan line of the excavator to the computer, and the excavation plan line and the excavation plan line by the data A means for displaying the external drawing line of the machine on the display, a means for advancing the external drawing line of the excavator along the planned excavation line by a set predetermined pitch distance on the display, and an overcut of the overcut cutter With means for setting the amount, with the advance of the external drawing line of the excavator, means for storing the excess digging amount for each position, with the advance of the external drawing line of the excavator,
A means for calculating the excavation track line that has been excavated by the cutter wheel and the overcutting cutter; a means for displaying the excavation track line obtained by the calculation together with the excavation plan line and the drawing line outside the excavator on a display; A means for calculating the touching position of the machine side surface of the drawing line protruding to the natural side from the track line, and the position of the overcutting cutter on the drawing line outside the machine matches the touching position, Or, a means for retracting the external line of the excavator on the display to a position slightly retracted therefrom, and means for updating the memory to the amount of excess excavation reset at the retracted position. Can be output as an instruction signal to the overcutting cutter driving device for advancing and retracting the overcutting cutter by calling the amount of overcutting at the position on the display corresponding to the position on the excavation planned line from the storage device. Characterized in that way the.

[0006]

According to the present invention, the excavation planned line and the external drawing line of the excavator are displayed on a display such as a CRT or a liquid crystal, and an arbitrary amount of extra excavation is set to simulate the excavation state on the display. The excavation trajectory line representing the excavated tunnel wall surface is displayed on the display together with the excavation plan line and the excavator exterior drawing line. If the line outside the excavator extends beyond the excavation trajectory line, it will touch the ground, so the position of the overcut cutter on the line outside the excavator matches the touching position. , Or a position slightly retracted from that position, the external line of the excavator machine is retracted on the display, and the excess excavation amount is set and input again at the retracted position to simulate. By repeating this, if the external line of the excavator on the display can pass without touching the natural ground, the amount of excess excavation set at that time will be excavated by the shield tunnel excavator during actual tunnel excavation work. This is the amount of excess digging that should be done. Therefore, the amount of excess excavation set for each position of the line outside the excavator on the excavation plan line is stored in the memory in correspondence with the position, and in the actual construction, the excavation position of the tunnel excavator is stored in the memory. The overdrill amount at that position is called and output as an instruction signal to the overdrill cutter driving device, thereby controlling the overdrill amount.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 2 is a view for explaining the principle of the present invention for a single-barrel type shield tunneling machine. In FIG. 2, reference numeral 1 denotes a planned excavation line, which is displayed on the display by reducing the center line of the tunnel for the excavation work to be performed. In the same figure, the portion where the straight line portion 11 of the planned excavation line 1 transitions to the curved portion 12 is displayed. Reference numerals 2 and 3 are design wall lines that connect points separated from the excavation plan line 1 by the radius of the excavator main body, and substantially correspond to the position of the outer surface of the segment assembled to cover the ground wall surface after tunnel excavation. It is a thing. Therefore, when the straight portion 11 is dug, the wall surface of the natural ground when the excavator proceeds without using the overcutting cutter coincides with the planned wall surface line. Reference numeral 4 denotes an external drawing line of the excavator. When the diameter and the length of the straight cylinder-shaped excavator main body are input to the computer, and the position with respect to the excavation planned line 1 is further input,
Appears on the display. The tunnel is completed by assembling the segment 5 by covering the ground wall surface after excavating the tunnel by the excavator, but the segment 5 is assembled in a circle centered on the excavation plan line 1 and its end face is opposite to the excavation plan line 1. It is a right angled surface. Since the rear end of the excavator is supported by the last assembled segment, the center line of the excavator at the straight portion 11 coincides with the excavation plan line 1. In the curved portion 12, the center point of support of the rear end of the excavator is on the excavation plan line 1, and the center line of the excavator is the excavation plan line 1 at the center point of the support.
Matches the tangent of. Therefore, the center line 41 of the drawing line 4 outside the machine determines the position and direction of the machine according to the above conditions, whereby the drawing line 4 outside the machine is displayed on the display. Reference numeral 42 denotes a support point which is a center point of operation when the excavator is supported by the segment at the above-mentioned rear end, and the support point 42 is determined for each excavator by the structure of the excavator. It is what

In FIG. 2, the drawing line 4 outside the excavator is displayed by superimposing three positions at different excavation positions. The position of indicates the state when the last segment 51 of the straight line portion 11 is assembled, and the center line 41 of the excavation machine exterior drawing line 4 is on the extension of the straight line portion 11 of the excavation planned line 1. The position of indicates the state when assembled to a part of the segment of the curved portion 12, and the position of indicates the state when assembled to the further curved portion. The drawing line outside the excavator at each position is drawn and displayed based on the position of the support point 42 and the direction of the center line 41 according to the above-described conditions.

If it is assumed that the excavation is not carried out and the straight excavation is carried out, both sides of the line 4 outside the excavator are solid. However, in order for the machine to change the direction while digging up to the position of entering the curved portion, the length of the line segment AB at the position of must be the excess digging amount. It can be understood from FIG. 2 that the length of the line segment AC needs to be the amount of extra digging at the position to dig further to the position. Furthermore, even if you start overdigging from the position of, you cannot reach the position where the side face of the excavator is restrained by the natural ground, so you must start overdigging from the position where the front end of the excavator enters the curved section. It can be understood that the amount of overburden must be increased gradually.

In FIG. 2, the excavation planning line 1 is drawn by simple straight lines and arcs to facilitate understanding. In such a case, it is theoretically possible to uniquely determine the amount of excess digging by obtaining the envelope of the side surface of the drawing line outside the excavator when excavating. However, in the actual tunnel excavation work, the position and direction of the machine are measured at any time,
The deviation amount from the designed excavation plan line is calculated, and the excavation plan line is recreated according to the deviation amount so as to return to the designed excavation plan line as soon as possible. As a result, the planned excavation line is not a straight line or a circular arc but a complicated curve. In order to deal with this, the present invention simulates the excavation state assuming an excessive excavation amount, and when it is confirmed on the display that the excavation can be performed without any trouble, the set excessive excavation amount is not exceeded in the actual work. The overditch cutter was controlled as the digging amount. The details will be described below with reference to examples.

FIG. 1 is a block diagram showing the configuration of an embodiment of the overdug amount control device according to the present invention. In FIG. 1, reference numeral 100 is a computer, and a controller 101 and a data memory 10 for controlling the entire computer.
2. Program memory 103, arithmetic unit 104,
These respective units are connected to each other via a bus line 105. The bus line 105 includes an input device 106 such as a keyboard, an interface 108 for outputting to the display 107, and an output terminal 109 for control output.
Are connected. A digital-analog converter 110 is connected to the output terminal 109, and further an amplifier 11 is connected.
It is connected to the overcutting cutter driving device 112 via 1. When the operator inputs the data of the excavation plan line, the numerical values of the length and diameter of the excavator main body, and the position data of the excavator with respect to the excavation plan line by the input device 106, these data are stored in the data memory 102. In the data memory 102, in order to store these data separately, the portion for storing the data of the excavation plan line, the dimensions of the excavator main body, that is, the dimensions of the external line of the excavator displayed on the display are stored. A part, a position of the excavator, that is, a part for storing the position of the external drawing line is prepared. Next, the operator uses the input device 106 to input the division pitch of the side surface portion 43 of the drawing line 4 outside the excavator. This is for calculating and determining the contact between the natural wall surface and the side surface portion of the external drawing line, and the contact is made on the side surface portion 43 of the external drawing line at the division pitch instructed as shown in FIG. The judgment point 44 is set. Instead of inputting the mutual distance between the touch determination points 44 as the division pitch, the distance may be calculated by the computer by inputting the number of the touch determination points 44.
The position of the touch determination point 44 thus obtained on the external image line 4 is stored in the external image line data portion of the data memory 102. Further, the operator inputs the excavation pitch from the input device 106. As the excavation pitch, one width dimension of the segment 5 or an integral multiple or integral fraction thereof is designated. In the example shown in FIG. 2, the width dimension of the segment is 2
This is an example in which the double is specified, and a pitch point corresponding to this excavation pitch is set on the excavation plan line 1. This is shown in FIG. 2 in which the support points 42 are displayed at three points corresponding to the excavation position and. The positions of these excavation pitch points are stored in the excavation planned line data portion of the data memory 102. When the operator inputs an instruction of “display” from the input device 106, the display program of the program memory 103 is executed and the display 107 is displayed.
Is displayed. The display of FIG. 3 shows a state in which the front end of the drawing line 4 outside the excavator coincides with the transition point from the straight line portion 11 to the curved line portion 12 of the excavation plan line 1. Although the touch determination point 44 is displayed in FIG. 3, here, the touch determination point 44 is displayed.
Does not have to be displayed. In the above description, the display 10
It is possible to display an image on the display device 7 only by applying a widely used technique, and a detailed description thereof will be omitted.

After completing the above preparatory operation, the operator inputs a simulation execution start signal through the input device 106. FIG. 4 shows the procedure of the subsequent operation and arithmetic processing. Reference numeral 201 is an input step of "execution start", and 202 is a determination step of changing the overburden amount. If the excess dug amount is not input here, the excess dug amount is set to 0, so an arbitrary amount of extra dug is set and input. This is step 203. The same applies when changing the amount of excess digging that has already been input.
Next, when the "forward" signal of step 204 is input,
The position advanced by one pitch on the excavation planned line 1 is called from the data memory 102, the calculation of step 205 is performed by the center line calculation program of the program memory 103 to determine the direction of the center line, and then step 20
At 6, the positions of all the touch determination points 44 on the excavator external drawing line 4 are calculated by the external drawing line position calculation program. Furthermore, by the excavation locus calculation program, the external line 4 of the excavator is displayed.
In step 207, the excavation locus is calculated by adding the amount of extra digging to the movement loci of both front end corners. The method of calculating the excavation locus is preferably performed by using the curvature of the excavation planning line 1 as a reference, but when the excavation pitch is set finely, there is no practical problem even if a method of linearly interpolating the positions before and after the advance is adopted. Absent.
The result of this calculation is displayed on the display 107 as a diagram as in FIG. 3, and is also stored in the data memory 102 together with the excavation position. Next, the contact determination program is executed, and the contact determination will be described later along with the process of advancing the curved portion, assuming that no contact occurs when moving forward on a straight line. Note that step 20
In the center line calculation 5 of FIG. 5, when it is determined from the data called from the data memory 102 that the advanced position is on a straight line, the touch determination program may be executed by jumping. .

As described above, the external line 4 of the excavator is advanced along the planned excavation line 1 by one pitch while setting an arbitrary amount of extra excavation. FIG. 5 shows a diagram displayed on the display 107 when moving forward to the position shown in FIG. 2. At this excavation position, the operation calculation shown in FIG. 4 proceeds to step 207 as described above. The result of the calculation when broken is displayed in FIG. In FIG. 5, the excavation planning line 1, the excavation machine external drawing line 4, and the like are the same as those shown in FIG. Further, the contact determination point 44 is the same as that shown in FIG. 6 is an excavation locus line outside the curved portion 12 of the planned excavation line 1, and since the amount of excess excavation is not given to the outside of the curved portion 12, the outer end of the cutter wheel, that is, the external marking line 4 of the excavator. The movement trajectory of the outer corner of the front end is displayed as the excavation trajectory line 6. Reference numeral 7 denotes an excavation locus line inside the curved portion 12 of the planned excavation line 1, and the inside of the curved portion 12 is advanced by setting an appropriate amount of excess digging as described above. An excavation locus in which the amount of excess excavation is added laterally from the inner corner of the front end of the line 4 is displayed as an excavation locus line 7. As is clear from FIG. 5, 44 (N) of the plurality of touch determination points 44
To 44 (N−M) of M touch determination points protrude from the excavation trajectory line 7 toward the natural side, and the side surface portion 43 of the machine-external line 4 of the excavator is inconsistent at the positions of these touch determination points. You can understand that it is touching. The computer 100 executes step 2 according to the touch determination program in the program memory 103.
The touch judgment calculation of 08 is performed. This calculation is performed as follows. That is, the position of each touch determination point 44 stored in the data memory 102 is called and compared with the position of the excavation trajectory line 7 also stored in the data memory 102. This comparison calculation is performed by comparing the position data of the ordinate system of the display 107 (vertical direction on the paper surface of FIG. 5). As a result of this calculation, a touch signal is displayed on the display 107 at M touch determination points from 44 (N) to 44 (N−M) which are touching the natural ground. This display is performed by means such as increasing the brightness of the touching determination point that is touching to display it brightly, or displaying it in different colors in the case of a color display. In addition to this, a commonly used display means such as an arrow or an underline can be adopted. When the touching signal is displayed, the operator inputs the signal of "retraction" from the input device 106, and the front end of the excavator exterior drawing line 4 is the M touching determination points which are touching. The external drawing line 4 of the excavator is retracted to a position which is the most retracted position or is slightly retracted. This operation is step 209.
In step 209, the operator may operate to retreat one pitch at a time, but if a "retract" signal is input, a program may be created to automatically retreat to the above-mentioned position. In any case, even if the excavator exterior drawing line 4 is moved backward by the operation of step 209,
Excavation trajectory calculation in step 207 and step 20
The result of the touch judgment calculation by 8 is stored in the data memory 102 without being erased, and the display on the display 107 is also retained.

In this way, the drawing machine outside drawing line 4 is returned to the step 202 at a position where the drawing machine outside drawing line 4 is retreated, and the above-described steps are repeatedly executed after changing the amount of extra digging. Move line 4 forward. By this, a new excavation trajectory is calculated, and the calculation result is the data memory 10
Stored in 2. At that time, the previous calculation result is erased, and the data is updated to the new calculation result. Similarly, the stored data of the overcut amount is also updated to the newly set overcut amount. Further, the excavation trajectory line 7 displayed on the display 107 is also rewritten by a new pitch into a new excavation trajectory line, and the excavation machine external drawing line 4 held on the display 107 with respect to the new excavation trajectory line 7 is rewritten. If no touch is made, the touch signal at the touch determination point 44 also disappears from the screen by one pitch.

In this way, the excavator exterior drawing line 4 is advanced to the position of once advanced, and further advanced from this position. At a further advanced position, if a contact with the natural ground occurs, the external line 4 of the excavator is retracted as described above,
Advance after changing the amount of digging. By repeating this, the amount of extra digging is determined up to the point where the rear end of the drawing line 4 outside the excavator passes, that is, up to the point F in the state shown in FIG.

In actual construction, when the current excavation position obtained by measuring the position of the tunnel excavator is input from the input device 106, the excess excavation amount set value at the corresponding position is output from the data memory 102. It is output to the terminal 109. This output signal is converted into an analog signal by the digital-analog converter 110, amplified by the amplifier 111,
It is transmitted to the overcut cutter driving device 112. As a result, the overcutting cutter is moved to a position corresponding to the output of the computer 100.

Since the tunnel excavator cannot retreat and dig again, if the outer surface touches the natural ground, neither forward nor backward can be performed, and it takes a lot of time and labor to repair it, but in the present invention, As described above, a simulation is performed in advance on the display, the excavator external drawing line is moved forward and backward to eliminate the contact with the natural ground, and the tunnel machine is used to excavate with the determined excess digging amount. ,
The amount of excess digging will not be too small or too large, and it will be possible to proceed with the amount of excess digging that is close to the limit.

The embodiment described above is an embodiment for the simplest model in which the center line of the external line of the excavator is made to coincide with the tangent line of the excavation plan line at the support point of the single-body tunnel excavator. As can be seen from FIG. 2, the inside of the curved part of the planned excavation line 1 is overexcavated, while the excavator external drawing line 4 is largely protruded outside the curved part. Not only is excavation eventually wasted, but the outer space of the segment must be backfilled after the segment is assembled, and the backfilling amount becomes large. As an excavation method for improving this, there is a method in which a tunnel machine is excavated inside the curved portion of the planned excavation line by slightly changing the direction. FIG. 6 is an explanatory diagram of this method, and the external line of the excavator in FIG. 6A is the same as that in FIG. Thus, the state in which the direction is changed to the inside of the curved portion 12 by the angle α around the support point 42 is the excavator external drawing line of (B).
This angle α is called the in-tail bending angle. Since a mechanism for giving a bending angle in the tail to the tunnel machine is well known, its description is omitted. As can be clearly seen from FIG. 6, when the bending angle in the tail is given, the amount of protrusion of the front end portion of the tunnel excavator to the outside of the curved portion is reduced, and wasteful excavation is reduced accordingly. Along with this, the amount of excess digging inside the curved portion can be reduced. In the method of excavating by giving the bending angle in the tail, the center line 41B of the drawing line outside the excavator partially enters inside the curved portion of the planned excavation line 1,
In this portion, it is easy for the outer side surface of the side surface to come into contact with the ground, and the present invention exhibits its effectiveness. As a concrete means corresponding to this method, step 20 in FIG.
After adding "whether the bending angle in tail is changed" in 2 and "Input bending angle in tail" in step 203, and calculating the tangential direction of the planned excavation line in the center line direction calculation of the step 205, It suffices to add a calculation for changing the direction by the in-tail bending angle α, and other than that, it is the same as that already described.

In the above description of the embodiment, referring to FIG.
5 and 6, the curvature of the excavation planning line 1 is greatly exaggerated in order to facilitate understanding. It is impossible to actually excavate along such a sharp curve with a single-body tunnel machine, and the actual curvature of the planned excavation line 1 is much smaller than the curvature shown in the drawing. Therefore, the amount of excess digging is much smaller than the amount shown in the drawing. In order to actually perform excavation on a sharp curve, a tunnel breaker with a broken center is used. The middle-break tunnel excavator has a structure in which the main body of the excavator is divided into a front body and a rear body, which are divided into two parts in the front and rear, and the front and rear bodies are connected so as to be mutually bendable. An embodiment in which the present invention is applied to this middle-break tunnel excavator will be described with reference to FIGS. 7 and 8.

FIG. 7 shows an example of a diagram in which the excavation simulation state of the center folding type excavator is displayed on the display 107. 1 is an excavation plan line, 4 is a line outside the excavator,
4a is a front body and 4b is a rear body. Reference numeral 4c is a connection point between the front body 4a and the rear body 4b, and both front and rear bodies are bent at this connection point. Reference numeral 4d is a supporting point on the operation of the rear body 4b, and corresponds to the supporting point 42 in FIG. The configuration of the apparatus in this embodiment is the same as that in FIG. 1, and its operation calculation is basically the same as in the case of the above-mentioned single-body tunnel excavator. However, in the pre-processing of the simulation, the items to be input for the external line of the excavator are different, and the diameter and length of the front barrel, the diameter and length of the rear barrel, the position of the connecting point 4c, and the position of the supporting point 4d are input, Further, the bending angle α in the tail and the bending angle β are entered. A calculation program corresponding to these input items is stored in the external drawing line calculation unit of the program memory 103. With this, the excavator external drawing line 4 as shown in FIG. 7 is calculated and displayed on the display 107. .

FIG. 8 shows the procedure of the operation and the arithmetic processing after the completion of the preprocessing in this embodiment. In the figure, steps denoted by the same reference numerals as those in FIG. 4 are steps for performing the same operation or calculation. The procedure of this embodiment is different from that of FIG. 4 in that a step of setting an in-tail bending angle and a step of setting a center bending angle are added before the steps 202 and 203 of setting the overdeep amount. That is, in step 2021, the operator determines whether to change the in-tail bending angle by the input device 10.
When inputting by 6 and changing, step 2031
Enter the bending angle in the tail with. Then step 2
At 022, a judgment is made as to whether or not the center bending angle is to be changed, and if it is to be changed, the value of the center bending angle is input at step 2032. These input values are stored in the data memory 10
2 and is used for the calculation of the drawing line outside the excavator by the above-mentioned calculation program. The procedure after the excess dug amount setting operation in step 202 is the same as that described in the description of FIG.

In any of the embodiments described above,
Set the amount of excess digging to be slightly small at the beginning, and increase the amount of excess digging little by little when it is judged that contact with the natural ground will occur, and set an excessive amount of excess digging. Things will disappear. In particular, in the case of a medium-break tunnel excavator, depending on how the bending angle in the tail and the intermediate bend angle are set, the side surface of the excavator may come into contact with the natural ground on the outside of the curved portion. Sometimes it may be necessary to overdug on the outside. In such a case, a simulation is performed by setting a touch determination point also on the outer wall surface portion of the drawing line outside the excavator. Even in a single-tunnel tunnel machine, the outer wall surface may touch the ground behind the support point 42, and the same applies when such a situation is assumed.

In the flow chart of the embodiment shown in FIG. 8, even if the order of the steps for setting the bending angle in the tail, the center bending angle, and the overcut amount is exchanged, the result is the same.
Further, in the steps of the order shown in FIG. 8, when the setting of the bending angle in the tail and the bending angle in the tail are not changed, and a judgment is made as to the change of the overdug amount, the steps 2021 and 2022 are automatically jumped. Various embodiments can be adopted without departing from the gist of the present invention, such as creating a program to do so. If there is an operation that can be automated among the operations described as being input by the operator in the embodiment, the same applies to the embodiment in which this is automated.

[0024]

[Effect of the Invention] While it is not possible to retract the excavator and dig again while the excavation work by the shield type tunnel excavator is in progress, in the present invention, the excavation simulation is performed by appropriately setting the amount of excess excavation. By doing this, you can judge whether the external line of the excavator touches the ground, and if it touches, move the position of the excavator back on the display, set the amount of excess digging, and then move forward. It is possible to confirm whether the touch can be resolved. Then, the excess dug amount for each excavation position that is set when it is confirmed that the excavation is not touched is output as an instruction signal to the excess dug cutter drive device during the actual work, and the excess dug is placed at the position corresponding to the output. Since the cutter can be moved, it is possible to prevent the occurrence of construction problems due to lack of excess excavation during tunnel excavation work.
Moreover, it is possible to set an appropriate value without excessively digging, and it is possible to reduce the time and cost of construction.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a device for controlling an overburden amount according to the present invention.

FIG. 2 is an explanatory diagram for explaining the principle of simulation of an overdug amount according to the present invention.

FIG. 3 is an explanatory diagram of contact determination points.

FIG. 4 is a flowchart showing an example of an operation / arithmetic processing procedure when the present invention is applied to a single-tunnel tunnel machine.

FIG. 5 is a diagram showing an example of a diagram during simulation displayed on a display when the present invention is applied to a single-body tunnel machine.

FIG. 6 is an explanatory diagram for explaining a state of excavation when an in-tail bending angle is given.

FIG. 7 is a diagram showing an example of a diagram during simulation displayed on a display when the present invention is applied to a center-bending tunnel machine.

FIG. 8 is a flowchart showing an example of an operation / arithmetic processing procedure when the present invention is applied to a center-bending tunnel machine.

[Explanation of symbols]

1 ... Excavation plan line, 4 ... Excavator external drawing line, 41 ... Excavator center line, 42 ... Excavator support point, 43 ... Side line of external drawing line,
44 ... Touch determination points, 4a ... Front body, 4b ... Rear body, 4c ... Front and rear body connecting points, 4d ... Rear body support points, 5 ... Segments, 6, 7 ... Excavation trajectory line, 100 ... Computer, 10
2 ... data memory, 103 ... program memory, 104
... calculator, 106 ... input device, 107 ... display, 1
08 ... Display interface, 109 ... Control output terminal, 112 ... Overcut cutter driving device, 202, 203 ...
Step of setting the amount of excess digging, 204 ... Advancement of the excavator position, 205 ... Calculating the excavator centerline, 206 ... Calculating the excavator outside line, 2
07 ... Step of calculating excavation trajectory line, 208 ... Step of determining contact, 209 ... Step of retracting excavator position, 2021, 2031 ... Step of setting in-tail bending angle, 2022, 2032 ... Medium bending angle Steps to be set, α… Bending angle in tail, β… Bending angle.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuhiro Yoshioka 650 Jinrachi-cho, Tsuchiura-shi, Ibaraki Hitachi Construction Machinery Co., Ltd. Tsuchiura factory

Claims (4)

[Claims] 1. An excess excavation amount control device for a shield tunnel excavator, comprising a rotating cutter wheel on the front of the excavator main body, and an excess excavation cutter capable of moving forward and backward from the cutter wheel. A means for inputting each data of the dimensions of the machine and the relative position of the machine and the planned line to the computer, and means for displaying the planned line and the external drawing line of the machine on the display by the data, A means for advancing the external drawing line of the excavator along the planned excavation line by the set predetermined pitch distance on the display, a means for setting the amount of excess excavation of the overcut cutter, and the advance of the excavator external drawing line Along with the above, means for storing the amount of excess digging for each position, and means for calculating the excavation trajectory line of the cutter wheel and the excess digging cutter along with the advance of the external drawing line of the excavator, Means for displaying the excavation trajectory line obtained by the above calculation on the display together with the excavation plan line and the excavation machine external drawing line, and the excavator side surface portion of the excavation machine external drawing line protruding to the natural side from the excavation trajectory line And a means for calculating the contact position, and the position of the overcutting cutter on the external line of the excavator matches the contact position, or a position slightly retracted from that position,
A means for retreating the external line of the excavator on the display, and a means for updating the memory to the amount of excess excavation reset at the retracted position, and the means corresponding to the position on the excavation plan line of the actual machine Excessive amount control of shield type tunnel excavator characterized in that the amount of excess excavation at the position on the display is called from the storage device and can be output as an instruction signal to the excess excavation cutter drive device that advances and retracts the excess excavation cutter. apparatus. 2. The position of the outer surface of the excavation machine external drawing line is a relative position with respect to each of the excavator center lines of a plurality of contact determination points set at predetermined intervals on the external drawing line. Over-digging amount control device for shield type tunnel machine. 3. A means for inputting data of a position of a support point, which is a support center point on which the excavator is supported by a segment, and a bending angle in the tail, and the support point is aligned with a planned excavation line and supported. 3. The shield according to claim 1, further comprising means for calculating the position of the marking line outside the excavator with the direction rotated by the bending angle in the tail with respect to the tangential direction of the excavation plan line at the point as the direction of the centerline of the excavator. Control device for excess tunnel excavator. 4. The excavator is a center-bending type excavator in which a front body and a rear body are flexibly connected to each other, and the dimensions of the front body, the size of the rear body, the connecting positions of the front and rear bodies, and the mutual relation between the front and rear bodies are formed. The excess amount of excavation of a shield tunnel machine according to claim 1, 2 or 3, further comprising means for inputting data of the middle bending angle and means for calculating the position of the external line of the excavator based on the input data. Control device.