CN114707230B - Method and system for predicting boulder ahead of tunneling of shield tunneling machine - Google Patents

Method and system for predicting boulder ahead of tunneling of shield tunneling machine Download PDF

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CN114707230B
CN114707230B CN202210618892.6A CN202210618892A CN114707230B CN 114707230 B CN114707230 B CN 114707230B CN 202210618892 A CN202210618892 A CN 202210618892A CN 114707230 B CN114707230 B CN 114707230B
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boulder
tunneling
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machine
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CN114707230A (en
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王怀东
佟方硕
刘晓迪
裴柏铮
莫宏岩
谢天祥
刘洪宇
李志重
崔广宇
孙建平
谢国兴
刘强
周明亮
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Fourth Engineering Co Ltd of China Railway No 9 Group Co Ltd
China Railway Metro Line 5 Co Ltd
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China Railway Metro Line 5 Co Ltd
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Abstract

The application provides a method and a system for predicting boulders in front of tunneling of a shield tunneling machine. The method comprises the following steps: determining a torque coefficient of the shield tunneling machine according to the cutter head torque acquired during tunneling of the shield tunneling machine so as to calculate a theoretical torque during tunneling of the shield tunneling machine; responding to the change of the cutter head torque and determining that the shield tunneling machine encounters the boulder when the cutter head torque is larger than 10% of the theoretical torque; and determining the position and the size of the boulder according to the cutter head rotating speed and the tunneling speed of the shield tunneling machine during tunneling based on a preset boulder prediction model. Therefore, whether the shield machine is excavated and meets the boulder or not and the position and the size of the boulder in front of the shield machine can be effectively judged through the stress of the hob, the excavation speed and the cutter head torque when the shield machine is excavated, the boulder is conveniently and quickly predicted, and the excavation safety of the shield machine is ensured.

Description

Method and system for predicting boulder ahead of tunneling of shield tunneling machine
Technical Field
The application relates to the technical field of shield construction, in particular to a method and a system for predicting boulders ahead of the tunneling of a shield machine.
Background
With the wide application of the shield construction technology in subway construction, some special address conditions can be met in the shield construction process, which causes great difficulty in shield construction. The tunnel construction in some places encounters the situation of boulders, the shield machine is often damaged, the shield tunneling is difficult, the stratum disturbance is increased, the ground surface settlement is aggravated, and even engineering accidents are caused under the serious situation.
Therefore, the detection of the boulder is a key link in the shield construction process, and the detection of the boulder and the discovery of the boulder are difficult problems to be solved urgently in the shield construction.
Disclosure of Invention
The application aims to provide a method and a system for predicting the boulder ahead of the tunneling of a shield tunneling machine, so as to solve or alleviate the problems in the prior art.
In order to achieve the above object, the present application provides the following technical solutions:
the application provides a method for predicting boulders ahead of tunneling of a shield tunneling machine, which comprises the following steps: step S101, determining a torque coefficient of the shield tunneling machine according to the acquired cutterhead torque during tunneling of the shield tunneling machine so as to calculate a theoretical torque during tunneling of the shield tunneling machine; s102, responding to the cutter head torque change and determining that the cutter head torque is larger than 10% of the theoretical torque, and the shield tunneling machine is determined to encounter the boulder; and S103, determining the position and the size of the boulder according to the cutter head rotating speed and the tunneling speed of the shield tunneling machine during tunneling based on a preset boulder prediction model.
Preferably, in step S101, the torque coefficient of the shield tunneling machine is corrected according to the cutter head torque acquired during tunneling by the shield tunneling machine, and the theoretical torque during tunneling by the shield tunneling machine without encountering an boulder is determined based on the corrected torque coefficient.
Preferably, in step S101, according to the formula:
Figure 162700DEST_PATH_IMAGE001
determining theoretical torque during tunneling of shield tunneling machine
Figure 664088DEST_PATH_IMAGE002
；
Wherein,
Figure 737086DEST_PATH_IMAGE003
representing the torque coefficient when the shield machine tunnels;
Figure 32939DEST_PATH_IMAGE004
the diameter of the cutter head of the shield machine is shown.
Preferably, in step S103, the preset orphan stone prediction model is:
Figure 692852DEST_PATH_IMAGE005
wherein,
Figure 466773DEST_PATH_IMAGE006
representing the distance between the boulder and the rotation center of the shield machine cutter;
Figure 128699DEST_PATH_IMAGE007
representing a boulder edgeThe radial length of the cutter head;
Figure 329873DEST_PATH_IMAGE008
the distance from the hob which is not subjected to stress change and is close to the rotation center of the cutter disc is shown;
Figure 474153DEST_PATH_IMAGE009
the distance between the two hobs with the radial stress change of the cutterhead is represented;
Figure 520607DEST_PATH_IMAGE010
showing the distance between the two hobs which are not subjected to stress change;
Figure 568197DEST_PATH_IMAGE011
to represent
Figure 940272DEST_PATH_IMAGE012
The size of the boulder is in the circumferential direction of the cutter head;
Figure 807734DEST_PATH_IMAGE013
to represent
Figure 956081DEST_PATH_IMAGE014
The size of the boulder is in the circumferential direction of the cutter head;
Figure 654916DEST_PATH_IMAGE012
、
Figure 962007DEST_PATH_IMAGE014
the distance from the two hobbing cutters which are not subjected to force change in the radial direction to the center of the cutter head is represented;
Figure 51186DEST_PATH_IMAGE015
representing the longest time of stress change of the hob;
Figure 439442DEST_PATH_IMAGE016
representing the variation time of the cutter head torque;
Figure 196045DEST_PATH_IMAGE017
indicating when the cutter head is cutting boulders
Figure 644344DEST_PATH_IMAGE016
The cutter head rotating speed at any moment;
Figure 987863DEST_PATH_IMAGE018
representing the size of the boulder along the tunneling direction;
Figure 179810DEST_PATH_IMAGE019
represent
Figure 790920DEST_PATH_IMAGE020
And (5) the tunneling speed of the shield tunneling machine at any moment.
The embodiment of the present application further provides a system for predicting boulders ahead of the shield tunneling machine, including: the correction unit is configured to determine a torque coefficient of the shield machine according to the acquired cutterhead torque when the shield machine tunnels so as to calculate a theoretical torque when the shield machine tunnels; the judging unit is configured to respond to the cutter torque change and determine that the shield tunneling machine encounters the boulder, wherein the cutter torque change is larger than 10% of the theoretical torque; and the prediction unit is configured to determine the position and the size of the boulder according to the cutter head rotating speed and the tunneling speed of the shield tunneling machine during tunneling based on a preset boulder prediction model.
Preferably, the correction unit is further configured to, according to the formula:
Figure 675699DEST_PATH_IMAGE001
determining theoretical torque during tunneling of shield tunneling machine
Figure 739470DEST_PATH_IMAGE002
；
Wherein,
Figure 499222DEST_PATH_IMAGE003
representing the torque coefficient when the shield machine tunnels;
Figure 495997DEST_PATH_IMAGE004
the diameter of the cutter head of the shield machine is shown.
Preferably, the correcting unit is further configured to correct a torque coefficient of the shield machine according to a cutter head torque acquired during tunneling of the shield machine, and determine a theoretical torque when the shield machine does not encounter an boulder during tunneling based on the corrected torque coefficient.
Preferably, the prediction model of the boulder deployed in the prediction unit is as follows:
Figure 82836DEST_PATH_IMAGE005
wherein,
Figure 633903DEST_PATH_IMAGE006
representing the distance between the boulder and the rotation center of the shield machine cutter;
Figure 669118DEST_PATH_IMAGE007
the length of the boulder along the radial direction of the cutter head is represented;
Figure 723661DEST_PATH_IMAGE008
the distance from the hob which is not subjected to stress change and is close to the rotation center of the cutter disc is shown;
Figure 684664DEST_PATH_IMAGE009
the distance between the two hobs with the radial stress change of the cutterhead is represented;
Figure 191869DEST_PATH_IMAGE010
showing the distance between the two hobs which are not subjected to stress change;
Figure 263730DEST_PATH_IMAGE011
represent
Figure 438359DEST_PATH_IMAGE012
The size of the boulder along the circumferential direction of the cutter head;
Figure 304684DEST_PATH_IMAGE013
to represent
Figure 328879DEST_PATH_IMAGE014
The size of the boulder along the circumferential direction of the cutter head;
Figure 470010DEST_PATH_IMAGE012
、
Figure 764725DEST_PATH_IMAGE014
the distance from the two hobbing cutters which are not subjected to force change in the radial direction to the center of the cutter head is represented;
Figure 67531DEST_PATH_IMAGE015
the longest time of stress change of the hob is represented;
Figure 346065DEST_PATH_IMAGE016
representing the variation time of the cutter head torque;
Figure 792352DEST_PATH_IMAGE017
indicating when the cutter head is cutting boulders
Figure 207153DEST_PATH_IMAGE016
The cutter head rotating speed at any moment;
Figure 680860DEST_PATH_IMAGE018
the size of the boulder along the tunneling direction is represented;
Figure 476384DEST_PATH_IMAGE019
to represent
Figure 756056DEST_PATH_IMAGE020
And (5) the tunneling speed of the shield tunneling machine at any moment.
Has the advantages that:
according to the method for predicting the boulder ahead of the tunneling of the shield machine, firstly, the torque coefficient of the shield machine is determined according to the acquired cutterhead torque when the shield machine tunnels, so that the theoretical torque when the shield machine tunnels is calculated; when the cutter head torque changes and is larger than 10% of the theoretical torque, judging that the shield tunneling machine encounters a boulder; and finally, based on a preset boulder prediction model, according to the rotating speed and the tunneling speed of the cutter head when the shield tunneling machine tunnels, the specific position and size of the boulder can be determined. Therefore, the boulder can be found in time and the size and the position of the boulder can be predicted in the tunneling process of the shield tunneling machine, and the tunneling safety of the shield tunneling machine is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. Wherein:
fig. 1 is a schematic flow diagram of a method for predicting boulders ahead of a shield tunneling machine in accordance with some embodiments of the present application;
FIG. 2 is a schematic diagram of a shield tunneling machine provided according to some embodiments of the present application in a solitary rock-bearing formation;
FIG. 3 is a schematic illustration of prediction of the radial size of an orphan stone provided in accordance with some embodiments of the present application;
FIG. 4 is a schematic illustration of a prediction of circumferential size of an orphan stone provided in accordance with some embodiments of the present application;
fig. 5 is a schematic structural diagram of a system for predicting boulders ahead of a shield tunneling machine provided in accordance with some embodiments of the present application.
Detailed Description
The present application will be described in detail below with reference to the embodiments with reference to the attached drawings. The various examples are provided by way of explanation of the application and are not limiting of the application. In fact, it will be apparent to those skilled in the art that modifications and variations can be made in the present application without departing from the scope or spirit of the application. For instance, features illustrated or described as part of one embodiment, can be used with another embodiment to yield a still further embodiment. It is therefore intended that the present application cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
When the poor geological state of the boulder exists in the stratum, different methods such as surface survey, drilling, geophysical prospecting and the like are adopted to analyze the distribution characteristics of the boulder in the exploration process; the methods can detect the size, shape and distribution characteristics of the boulder, but the methods are high in cost and can often cause the condition of missing detection due to the existence of the drilling hole spacing.
As shown in fig. 1 to 4, the method for predicting the boulder ahead of the shield tunneling machine comprises the following steps:
and S101, determining a torque coefficient of the shield tunneling machine according to the acquired cutterhead torque during tunneling of the shield tunneling machine so as to calculate a theoretical torque during tunneling of the shield tunneling machine.
In the application, the tunneling parameters of the shield machine are collected in real time through a tunnel construction real-time management information system, namely a PDV data collection system, in the shield machine. Specifically, the PDV data acquisition system monitors and records the cutter head rotating speed, the tunneling speed, the total thrust, the acquisition torque (acquired cutter head torque), the soil bin pressure, the rotating speed of the screw conveyor, the stress of the hob and the like of the shield in real time.
Here, the shield PDV data acquisition system communicates with a Programmable Logic Controller (PLC for short) of the shield machine through CP5611 to obtain the PDV data; and performs data transmission with a remote control (e.g., a remote computer, etc.) through the COM 2. The measurement data acquired by the shield PDV data acquisition system is acquired by a measurement sensor in continuous clock pulses, recorded at a set moment, and an average value acquired for multiple times is acquired through average value calculation and is output.
According to the method and the device, the torque coefficient of the shield machine is corrected according to the cutter head torque acquired during tunneling of the shield machine, and the theoretical torque when the shield machine does not encounter boulders during tunneling is determined based on the corrected torque coefficient. Specifically, the cutter torque to the theoretical torque is acquired according to a PDV data acquisition system
Figure 556521DEST_PATH_IMAGE002
Correcting, namely correcting the torque coefficient according to the difference value of the acquired cutter head torque and the theoretical torque calculated based on the preliminarily determined torque coefficient until the acquired cutter head torque is up to the acquired cutter head torque when the shield tunneling machine does not encounter a boulderAnd determining that the torque coefficient corresponding to the theoretical torque at the moment is the actual torque coefficient of the shield machine when the difference value between the calculated theoretical torque and the calculated theoretical torque is less than or equal to a preset torque threshold value.
And in the tunneling process of the shield tunneling machine, calculating theoretical torque of the shield tunneling machine according to the actual torque coefficient of the shield tunneling machine determined after correction, comparing the theoretical torque with the acquired cutter head torque, and determining whether the shield tunneling machine encounters the boulder or not according to the torque error of the theoretical torque and the acquired cutter head torque.
Further determining theoretical torque of the shield tunneling machine during tunneling according to the formula (1)
Figure 233753DEST_PATH_IMAGE002
. Equation (1) is as follows:
Figure 955721DEST_PATH_IMAGE001
…………………………（1）
wherein,
Figure 242346DEST_PATH_IMAGE003
representing the torque coefficient when the shield machine tunnels;
Figure 162897DEST_PATH_IMAGE004
the diameter of the cutter head of the shield machine is shown.
In this case, the torque coefficients of different types of shields are different in value. In particular, for a mechanical shield,
Figure 476942DEST_PATH_IMAGE003
has a value range of
Figure 951785DEST_PATH_IMAGE021
(ii) a For the slurry shield, the slurry shield is provided with a slurry inlet,
Figure 245363DEST_PATH_IMAGE003
has a value range of
Figure 958105DEST_PATH_IMAGE022
(ii) a To the earth pressure shield, the earth pressure shield is arranged,
Figure 944515DEST_PATH_IMAGE003
has a value range of
Figure 939278DEST_PATH_IMAGE023
。
S102, responding to the cutter head torque change and determining that the cutter head torque is larger than 10% of the theoretical torque, and the shield tunneling machine is determined to encounter the boulder;
in the application, based on the allowable error during civil engineering construction, when the cutter head torque is greater than 10% of the theoretical torque, the situation that the arc stone is encountered in the tunneling process of the shield tunneling machine is judged. Here, it can be understood that when the shield tunneling machine encounters an isolated stone in the tunneling process, the increase of the cutter head torque is always greater than the theoretical torque within a certain time period, and the size of the encountered isolated stone can be judged according to the size of the difference between the cutter head torque and the theoretical torque. When the cutter head torque far exceeds the theoretical torque, namely the difference between the cutter head torque and the theoretical torque is large, the boulder encountered by the shield tunneling machine is large; when the cutter head torque slightly exceeds the theoretical torque, namely the difference between the cutter head torque and the theoretical torque is small, the boulder encountered by the shield tunneling machine in tunneling is small.
And S103, determining the position and size of the boulder according to the rotating speed and the tunneling speed of a cutter head during tunneling of the shield tunneling machine based on a preset boulder prediction model.
Specifically, the orphan stone prediction model is shown in formula (2), and formula (2) is as follows:
Figure 567706DEST_PATH_IMAGE024
…………………………（2）
wherein,
Figure 400532DEST_PATH_IMAGE006
representing the distance between the boulder and the rotation center of the shield machine cutter;
Figure 823424DEST_PATH_IMAGE007
representing the length of the boulder in the radial direction of the cutter head；
Figure 272859DEST_PATH_IMAGE008
The distance from the hob which is not subjected to stress change and is close to the rotation center of the cutter disc is shown;
Figure 961371DEST_PATH_IMAGE009
the distance between the two hobs with the radial stress change of the cutterhead is represented;
Figure 648704DEST_PATH_IMAGE010
showing the distance between the two hobs which are not subjected to stress change;
Figure 242497DEST_PATH_IMAGE011
to represent
Figure 382491DEST_PATH_IMAGE012
The size of the boulder along the circumferential direction of the cutter head;
Figure 883880DEST_PATH_IMAGE013
to represent
Figure 192764DEST_PATH_IMAGE014
The size of the boulder along the circumferential direction of the cutter head;
Figure 691878DEST_PATH_IMAGE012
、
Figure 584748DEST_PATH_IMAGE014
the distance from the two hobbing cutters which are not subjected to force change in the radial direction to the center of the cutter head is represented;
Figure 296352DEST_PATH_IMAGE015
representing the longest time of stress change of the hob;
Figure 223856DEST_PATH_IMAGE016
representing the variation time of the cutter head torque;
Figure 893872DEST_PATH_IMAGE017
indicating when the cutter head is cutting boulders
Figure 8459DEST_PATH_IMAGE016
The cutter head rotating speed at any moment;
Figure 287868DEST_PATH_IMAGE018
the size of the boulder along the tunneling direction is represented;
Figure 804300DEST_PATH_IMAGE019
to represent
Figure 645217DEST_PATH_IMAGE020
And (5) the tunneling speed of the shield tunneling machine at any moment.
In the application, in the tunneling process of the shield tunneling machine, when the hob encounters the boulder, the stress of the hob participating in cutting the boulder can be changed according to the stress condition of the hob recorded by the real-time stress monitoring system. When the hob with the radial cutter disc cuts the boulder, the hob with the changed stress is the range of the boulder. Furthermore, the distance between the two hobs is changed according to the radial stress of the cutterhead
Figure 247100DEST_PATH_IMAGE009
And the distance between the two hobbing cutters which are not subjected to stress change
Figure 831665DEST_PATH_IMAGE010
The length of the boulder along the radial direction of the cutter head can be determined according to the formula (2)
Figure 202603DEST_PATH_IMAGE025
。
In this application, hobbing cutter atress real-time supervision system mainly carries out real-time supervision to the hobbing cutter atress of different positions through wireless strain node sensor, and wireless strain node sensor sends the hobbing cutter atress data of gathering through wireless gateway.
In this application, whether the shield constructs the machine and excavates and meet the boulder can be effectually judged through hobbing cutter atress, tunnelling speed, the blade disc moment of torsion when the shield constructs the machine and excavates to and the position and the size of the boulder that the shield constructs the machine place ahead and meet, not only easy operation, with low costs, convenient, quick prediction boulder in addition ensures the tunnelling safety of shield structure machine.
Fig. 5 is a schematic structural diagram of a system for predicting boulders ahead of a shield tunneling machine according to some embodiments of the present application; as shown in fig. 5, the system for predicting the boulder ahead of the shield machine comprises: correction section 501, determination section 502, and prediction section 503. The correction unit 501 is configured to determine a torque coefficient of the shield machine according to a cutterhead torque acquired during tunneling of the shield machine, so as to calculate a theoretical torque during tunneling of the shield machine; the judging unit 502 is configured to respond to the cutter torque change and determine that the shield tunneling machine encounters the boulder, wherein the cutter torque change is larger than 10% of the theoretical torque; the prediction unit 503 is configured to determine the position and size of the boulder according to the cutter head rotation speed and the tunneling speed of the shield tunneling machine during tunneling based on a preset boulder prediction model.
The correcting unit 501 is further configured to correct a torque coefficient of the shield machine according to a cutter head torque acquired during tunneling of the shield machine, and determine a theoretical torque when the shield machine does not encounter an boulder during tunneling based on the corrected torque coefficient.
The modification unit 501 is further configured to, according to the formula:
Figure 480001DEST_PATH_IMAGE001
determining theoretical torque during tunneling of shield tunneling machine
Figure 303600DEST_PATH_IMAGE002
；
Wherein,
Figure 193321DEST_PATH_IMAGE003
representing the torque coefficient when the shield machine tunnels;
Figure 418766DEST_PATH_IMAGE004
the diameter of the cutter head of the shield machine is shown.
The boulder prediction model deployed in the prediction unit 503 is:
Figure 867065DEST_PATH_IMAGE005
wherein,
Figure 443540DEST_PATH_IMAGE006
representing the distance between the boulder and the rotation center of the shield machine cutter;
Figure 369908DEST_PATH_IMAGE007
the length of the boulder along the radial direction of the cutter head is represented;
Figure 449859DEST_PATH_IMAGE008
the distance from the hob which is not subjected to stress change and is close to the rotation center of the cutter disc is shown;
Figure 69059DEST_PATH_IMAGE009
the distance between the two hobs with the radial stress change of the cutterhead is represented;
Figure 365786DEST_PATH_IMAGE010
showing the distance between the two hobs which are not subjected to stress change;
Figure 830266DEST_PATH_IMAGE011
to represent
Figure 30303DEST_PATH_IMAGE012
The size of the boulder along the circumferential direction of the cutter head;
Figure 820404DEST_PATH_IMAGE013
to represent
Figure 840313DEST_PATH_IMAGE014
The size of the boulder along the circumferential direction of the cutter head;
Figure 374062DEST_PATH_IMAGE012
、
Figure 694185DEST_PATH_IMAGE014
the distance from the two hobbing cutters which are not subjected to force change in the radial direction to the center of the cutter head is represented;
Figure 389609DEST_PATH_IMAGE015
the longest time of stress change of the hob is represented;
Figure 663858DEST_PATH_IMAGE016
representing the variation time of the cutter head torque;
Figure 735719DEST_PATH_IMAGE017
indicating when the cutter head is cutting boulders
Figure 910348DEST_PATH_IMAGE016
The cutter head rotating speed at any moment;
Figure 42252DEST_PATH_IMAGE018
the size of the boulder along the tunneling direction is represented;
Figure 36753DEST_PATH_IMAGE019
to represent
Figure 912305DEST_PATH_IMAGE020
And (5) the tunneling speed of the shield tunneling machine at any moment.
The boulder prediction system in front of the shield machine in tunneling provided by the embodiment of the application can realize the steps and the flows of any method for predicting the boulder in front of the shield machine in tunneling, and achieve the same technical effects, which are not described in detail herein.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (6)

1. A method for predicting boulders ahead of tunneling of a shield tunneling machine is characterized by comprising the following steps:
step S101, determining a torque coefficient of the shield tunneling machine according to a cutterhead torque acquired during tunneling of the shield tunneling machine, and calculating a theoretical torque during tunneling of the shield tunneling machine;
s102, responding to the cutter head torque change and determining that the cutter head torque is larger than 10% of the theoretical torque, and the shield tunneling machine is determined to encounter the boulder;
step S103, based on a preset boulder prediction model, determining the position and the size of the boulder according to the cutter head rotating speed and the tunneling speed of the shield tunneling machine during tunneling,
the preset boulder prediction model comprises the following steps:
Figure DEST_PATH_IMAGE001
wherein,
Figure 225793DEST_PATH_IMAGE002
representing the distance between the boulder and the rotation center of the shield machine cutter;
Figure DEST_PATH_IMAGE003
the length of the boulder along the radial direction of the cutter head is represented;
Figure 726044DEST_PATH_IMAGE004
the distance from the hob which is not subjected to stress change and is close to the rotation center of the cutter disc is shown;
Figure DEST_PATH_IMAGE005
the distance between the two hobs with the radial stress change of the cutterhead is represented;
Figure 146662DEST_PATH_IMAGE006
showing the distance between the two hobs which are not subjected to stress change;
Figure DEST_PATH_IMAGE007
to represent
Figure 432280DEST_PATH_IMAGE008
The size of the boulder along the circumferential direction of the cutter head;
Figure DEST_PATH_IMAGE009
to represent
Figure 608047DEST_PATH_IMAGE010
The size of the boulder along the circumferential direction of the cutter head;
Figure 533278DEST_PATH_IMAGE008
、
Figure 69170DEST_PATH_IMAGE010
the distance from the two hobbing cutters which are not subjected to force change in the radial direction to the center of the cutter head is represented;
Figure DEST_PATH_IMAGE011
the longest time of stress change of the hob is represented;
Figure 130667DEST_PATH_IMAGE012
representing the variation time of the cutter head torque;
Figure DEST_PATH_IMAGE013
indicating when the cutter head is cutting boulders
Figure 477335DEST_PATH_IMAGE012
The cutter head rotating speed at any moment;
Figure 889861DEST_PATH_IMAGE014
representing the size of the boulder along the tunneling direction;
Figure DEST_PATH_IMAGE015
to represent
Figure 730910DEST_PATH_IMAGE012
And (5) the tunneling speed of the shield tunneling machine at any moment.
2. The method for predicting the boulder ahead of the shield tunneling machine of claim 1, wherein in step S101,
correcting the torque coefficient of the shield tunneling machine according to the cutter head torque acquired during tunneling of the shield tunneling machine, and determining the theoretical torque when the shield tunneling machine does not encounter the boulder based on the corrected torque coefficient.
3. The method for predicting the boulders before the shield tunneling of claim 1, wherein in step S101, according to the formula:
Figure 912492DEST_PATH_IMAGE016
determining theoretical torque during tunneling of shield tunneling machine
Figure DEST_PATH_IMAGE017
；
Wherein,
Figure 164482DEST_PATH_IMAGE018
representing the torque coefficient when the shield machine tunnels;
Figure DEST_PATH_IMAGE019
the diameter of the cutter head of the shield machine is shown.
4. A system for predicting boulders ahead of a shield tunneling machine in tunneling is characterized by comprising:
the correction unit is configured to determine a torque coefficient of the shield machine according to the acquired cutterhead torque when the shield machine tunnels so as to calculate a theoretical torque when the shield machine tunnels;
the judging unit is configured to respond to the cutter torque change and determine that the shield tunneling machine encounters the boulder, wherein the cutter torque change is larger than 10% of the theoretical torque;
the prediction unit is configured to determine the position and the size of the boulder according to the cutter head rotating speed and the tunneling speed of the shield tunneling machine during tunneling on the basis of a preset boulder prediction model;
wherein, the preset orphan stone prediction model is as follows:
Figure 64305DEST_PATH_IMAGE020
wherein,
Figure 942000DEST_PATH_IMAGE002
representing the distance between the boulder and the rotation center of the shield machine cutter;
Figure 243668DEST_PATH_IMAGE003
the length of the boulder along the radial direction of the cutter head is represented;
Figure 604242DEST_PATH_IMAGE004
the distance from the hob which is not subjected to stress change and is close to the rotation center of the cutter disc is shown;
Figure 53678DEST_PATH_IMAGE005
the distance between the two hobs with the radial stress change of the cutterhead is represented;
Figure 423480DEST_PATH_IMAGE006
showing the distance between the two hobs which are not subjected to stress change;
Figure 314075DEST_PATH_IMAGE007
to represent
Figure 924179DEST_PATH_IMAGE008
The size of the boulder along the circumferential direction of the cutter head;
Figure 533015DEST_PATH_IMAGE009
to represent
Figure 706508DEST_PATH_IMAGE010
The size of the boulder along the circumferential direction of the cutter head;
Figure 779506DEST_PATH_IMAGE008
、
Figure 747462DEST_PATH_IMAGE010
the distance from the two hobbing cutters which are not subjected to force change in the radial direction to the center of the cutter head is represented;
Figure 843594DEST_PATH_IMAGE011
representing the longest time of stress change of the hob;
Figure 866782DEST_PATH_IMAGE012
representing the variation time of the cutter head torque;
Figure 731970DEST_PATH_IMAGE013
indicating when the cutter head is cutting boulders
Figure 870828DEST_PATH_IMAGE012
The cutter head rotating speed at any moment;
Figure 516573DEST_PATH_IMAGE014
the size of the boulder along the tunneling direction is represented;
Figure 766288DEST_PATH_IMAGE015
to represent
Figure 751562DEST_PATH_IMAGE012
And (5) the tunneling speed of the shield tunneling machine at any moment.
5. The system for predicting the boulder ahead of the shield tunneling machine of claim 4, wherein the correction unit is further configured to correct a torque coefficient of the shield tunneling machine according to a cutterhead torque collected during tunneling of the shield tunneling machine, and determine a theoretical torque during tunneling of the shield tunneling machine without encountering the boulder based on the corrected torque coefficient.
6. The system of claim 4, wherein the correction unit is further configured to, in accordance with the formula:
Figure 61320DEST_PATH_IMAGE016
determining theoretical torque of shield tunneling machine during tunneling
Figure 945094DEST_PATH_IMAGE017
；
Wherein,
Figure 998501DEST_PATH_IMAGE018
representing the torque coefficient when the shield machine tunnels;
Figure 838281DEST_PATH_IMAGE019
the diameter of the cutter head of the shield machine is shown.
CN202210618892.6A 2022-06-02 2022-06-02 Method and system for predicting boulder ahead of tunneling of shield tunneling machine Active CN114707230B (en)

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