Electrical method detection device and method with shield cutter head and shield as power supply electrodes

Abstract

The invention belongs to the field of urban shield tunnel resistivity method detection. According to the electrical method detection device and method with the shield cutterhead and the shield as the power supply electrodes, a transmitter unit carried in a main control room of a shield tunneling machine is connected with a transmitting electrode unit through a cable, and the transmitting electrode unit comprises the shield cutterhead and the shield; a receiver unit arranged on a shield tunneling machine is connected with a receiving electrode unit through a cable, and the receiving electrode unit comprises a plurality of receiving electrodes arranged in shield segment gaps; the shield cutter head and the shield are used as the power supply electrodes, so that the time for arranging the power supply electrodes in the hole is saved, and the detection efficiency and the shield tunneling efficiency are improved.

Description

Technical Field

[0001] The invention relates to the field of resistivity detection of urban shield tunnels, and in particular to an electrical detection device and method using a shield cutter head and a shield as power supply electrodes. Background Art

[0002] The statements in this section merely provide background art related to the present invention and do not necessarily constitute prior art.

[0003] In order to solve the problem of urban traffic congestion, subways have become an indispensable transportation measure for densely populated cities. Shield tunneling is the mainstream construction method for urban subway construction, but urban subway shield tunnel construction also faces many problems, such as the complex underground geological conditions in cities, the presence of unfavorable geology such as karst caves, weak interlayers, and water-rich zones, which are very likely to induce sudden water inrush, stratum instability, surface collapse and other disasters, which can seriously cause economic losses and casualties, posing a serious threat to the safety of shield tunnel construction.

[0004] It is understood that the DC resistivity method can effectively identify groundwater, faults, caves, mudstone, hard rock and other geological structures, and deal with risky areas for excavation to avoid disasters such as sudden water inrush and ground instability, and ensure the safety of construction workers. However, there are the following problems when conducting detection in shield tunnels: (1) Common detection methods require the arrangement of measuring electrodes on the tunnel face and power supply electrodes on the tunnel side walls, which requires some space to be left in front of the tunnel face, affecting the shield tunneling period; (2) The detection equipment needs to be transported manually, and the measuring electrodes and power supply electrodes need to be rearranged for each detection, which reduces the detection efficiency and increases the manpower consumption; (3) Traditional shield tunnel detection requires workers to enter the shield cutterhead to lay electrodes, and the safety of the workers cannot be guaranteed. Summary of the invention

[0005] In order to address the deficiencies in the prior art, the present invention provides an electrical detection device and method using a shield cutterhead and a shield as power supply electrodes. The shield cutterhead and the shield serve as power supply electrodes, which saves the time for arranging the power supply electrodes in the tunnel and improves the detection efficiency and the shield excavation efficiency.

[0006] In order to achieve the above object, the present invention adopts the following technical solution: In a first aspect, the present invention provides an electrical detection device in which a shield cutter head and a shield are power supply electrodes.

[0007] An electrical detection device with a shield cutter head and a shield as power supply electrodes, comprising: a transmitter unit, a receiver unit, a transmitting electrode unit and a receiving electrode unit; The transmitter unit mounted in the main control room of the shield machine is connected to the transmitting electrode unit through a cable, and the transmitting electrode unit is a shield cutter head and a shield; The receiver unit arranged on the shield machine is connected to the receiving electrode unit through a cable. The receiving electrode unit includes a plurality of receiving electrodes arranged in the gaps of the shield segments.

[0008] As a further limitation of the first aspect of the present invention, the transmitter unit includes: a power filter module, a power switch, a signal interpretation module, a constant voltage control module, a constant current control module, a current data receiving module, a voltage data receiving module and a transmitting switch, the AC power supply is connected to the power filter module, the power filter module is connected to the power switch, and the power switch is connected to the signal interpretation module; The signal interpretation module is connected to the constant voltage control module and the constant current control module respectively, the constant voltage control module and the constant current control module are connected to the transmitting switch respectively, and the transmitting switch is connected to the transmitting electrode unit; The current data receiving module, the voltage data receiving module and the signal interpretation module are respectively connected to the computer of the shield main control room.

[0009] As a further limitation of the first aspect of the present invention, the signal interpretation module is used to receive the transmission signal set in the computer of the shield main control room, and control the transmission work of the constant voltage control module or the constant current control module.

[0010] As a further limitation of the first aspect of the present invention, the constant voltage control module and the constant current control module of the transmitter unit are used to execute the set transmission task and control the magnitude of the transmission current and the transmission voltage.

[0011] As a further limitation of the first aspect of the present invention, the transmitter unit also includes an indicator light, which is used to indicate the status of the transmitter unit. The off state indicates that the transmitter unit is turned off and not connected to the power supply, the first color state indicates that the power supply is connected but not transmitting, and the second color state indicates that the transmitter unit is transmitting.

[0012] As a further limitation of the first aspect of the present invention, the current data receiving module and the voltage data receiving module are used to collect the emitted current and voltage after the transmitter unit emits current, and transmit them to the shield main control room computer, and the shield main control room computer displays the actual emission signal of the transmitter unit.

[0013] As a further limitation of the first aspect of the present invention, the receiver unit includes: a power switch module, a data acquisition module, a Wi-Fi module, a GPS, a data transmission module, an electrode information transmission module and a receiving electrode access module; The data acquisition module is connected to the data transmission module, the data transmission module is connected to the Wi-Fi module, the Wi-Fi module is connected to the computer of the shield main control room, the receiving electrode access module is connected to each receiving electrode, the receiving electrode access module is connected to the electrode information transmission module, and the electrode information transmission module is connected to the computer of the shield main control room.

[0014] As a further limitation of the first aspect of the present invention, the receiving electrode unit includes a plurality of independent electrodes, and each independent electrode is arranged in a plurality of circles in the gap of the shield segment.

[0015] In a second aspect, the present invention provides a shield machine, which is equipped with the electrical detection device in which the shield cutter head and the shield as the power supply electrode described in the first aspect of the present invention are used.

[0016] In a third aspect, the present invention provides an operating method of an electrical detection device using a shield cutter head and a shield as power supply electrodes, using the electrical detection device using the shield cutter head and the shield as power supply electrodes described in the first aspect of the present invention, comprising the following process: In the shield machine, the transmitter unit is connected to the shield of the shield machine. The shield cutterhead and the shield of the shield machine act as power supply electrodes. At the rear of the shield machine, the measuring electrodes are arranged in the gaps of the shield segments in three circles and connected to the receiver unit. Connect the transmitter unit to the external power supply, turn on the transmitter unit, wait for the indicator light to light up red, turn on the power switch of the receiver unit, connect the receiver unit and the computer in the shield control room with a Wi-Fi module, start the detection software in the computer in the shield control room, and prepare for the detection operation; After the transmitter unit, the receiver unit and the shield control room computer are connected, the transmission mode, duty cycle, power supply cycle, power supply and acquisition channel number of the transmitter unit are selected through the shield control room computer in the main control room; After confirming that there are no construction workers at the shield cutterhead and shield, detection begins. The shield main control room computer in the main control room controls the constant current high-power transmission module to transmit current, and checks the indicator light of the transmitter unit, which is green at this time; All data from the detection will be stored in the computer in the shield main control room. The detection data will be processed by specific data processing software in the computer in the shield main control room to obtain the specific situation of the detection area.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The transmitter unit of the present invention is mounted inside the shield machine, and the shield cutterhead and shield are used as power supply electrodes, which saves the time for arranging the power supply electrodes in the tunnel and improves the detection efficiency and shield excavation efficiency.

[0018] 2. The transmitter unit of the present invention moves with the shield machine without the need for manual transportation, and the cable does not need to be exposed outside the shield machine during detection, thereby protecting the transmitter unit from damage by water leakage and dust.

[0019] 3. The present invention arranges the receiver unit in the area where the construction is completed. The receiver unit is connected to the shield main control room computer in the main control room with a Wi-Fi module, which can transmit the location information and detection information in real time, and uses exclusive software to control the transmission of the transmitter unit and the reception of the receiver unit, which is conducive to realizing efficient detection.

[0020] 4. The present invention does not require workers to enter the cutter head compartment to install electrodes during detection, thereby ensuring the safety of workers.

[0021] Advantages of additional aspects of the present invention will be given in part in the following description, and in part will become obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0023] Figure 1 The principle and internal unit diagram of the transmitter unit provided by the present invention; Figure 2 The principle and internal unit diagram of the receiver unit provided by the present invention; Figure 3 A schematic diagram of the overall arrangement of the device provided by the present invention; Figure 4 A flow chart of the combined detection of underground caves provided by the present invention; Among them, 1. Shield segment; 2. Main control room; 3. Transmitter unit; 4. Cable; 5. Receiver unit; 6. Measuring electrode; 7. Shield; 8. Shield cutterhead; 9. Area to be measured. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0026] In this implementation, an electrical detection device is proposed in which the shield cutterhead and the shield are the power supply electrodes. Figure 1 and Figure 2 As shown, it includes: a transmitter unit 3, a receiver unit 5, a transmitting electrode unit and a receiving electrode unit.

[0027] Specifically, the transmitter unit 3 includes: a power filter module, a power switch, a signal interpretation module, a constant voltage control module, a constant current control module, a voltage data receiving module, a current data receiving module and an indicator light; The receiver unit 5 includes: a power switch module, a data acquisition module, a Wi-Fi module, a GPS, a data transmission module, an electrode information transmission module and a receiving electrode access module; The transmitting electrode unit comprises: a shield cutter head 8 and a shield shield 7; The receiving electrode unit includes: a measuring electrode 6 ( Figure 2 Only the first, second and third measuring electrodes are shown).

[0028] In this implementation, preferably, Figure 1 As shown, the transmitter unit 3 integrates a power filter module, a power switch, a signal interpretation module, a constant voltage control module, a constant current control module, a voltage data receiving module, a current data receiving module and an indicator light. The transmitter unit 3 is mounted in the shield machine main control room 2. The shield main control room computer in the main control room 2 controls the transmitter unit 3 to transmit, which is convenient for operators to operate the transmitter unit. A cable 4 is set to connect the transmitter unit 3 to the shield main control room computer.

[0029] More specifically, the transmitting switch of the transmitter unit 3 is connected to the constant voltage control module and the constant current control module. The AC power supply is filtered through the EMC filter unit (i.e., the power supply filter module) and then input into the transmitting unit. The transmitting mode and transmitting current are set by the shield main control room computer in the main control room 2, and the set current is output through the signal interpretation module.

[0030] After passing through the power filter module and the power switch, the 220V AC power is converted into DC power through the AC / DC module, and then converted into DC power suitable for detection through the DC / DC module.

[0031] The signal interpretation module of this implementation is used to receive the transmission control signal set in the computer of the shield main control room or transmitted from the ground, and control the relevant units inside the transmitter unit 3 to complete the transmission work of the specified mode.

[0032] The constant voltage control module and the constant current control module of this implementation are used to execute the set transmission task and control the magnitude of the transmission current and the transmission voltage.

[0033] The transmitting switch of this implementation is used to control the transmitter unit 3 to transmit current and stop transmitting current.

[0034] The indicator light of this implementation is used to indicate the status of the transmitter unit 3. The off state indicates that the transmitter unit 3 is turned off and not connected to the power supply. The red state (i.e., the first color) indicates that the power supply is connected but not transmitting. The green state (i.e., the second color) indicates that the transmitter unit 3 is transmitting.

[0035] The current data receiving module and voltage data receiving module of this implementation are used to collect the emitted current and voltage after the transmitter unit 3 emits current, and transmit them to the shield main control room computer. The shield main control room computer displays the actual emission signal of the transmitter unit 3.

[0036] In this implementation, the computer in the shield control room is used to control the power switch of the transmitter unit 3. When the red light of the transmitter unit 3 is on, the transmission mode required for detection is selected in the control software of the computer in the shield control room. The signal interpretation module of the transmitter unit 3 receives the instructions of the computer in the shield control room, and mobilizes the constant voltage control module or the constant current control module to perform current transmission according to the instructions. After the transmission parameters are set, the transmission switch is controlled by the computer in the shield control room to perform current transmission. When the indicator light of the transmitter unit 3 is green, it indicates that the transmitter unit 3 is transmitting normally.

[0037] In this implementation, preferably, Figure 2 As shown, the receiver unit 5 integrates a power switch module, a data acquisition module, a Wi-Fi module, a GPS, a data transmission module and an electrode information transmission module. The power switch module of the receiver unit 5 is turned on by the computer in the shield main control room, and the received data is collected by the data acquisition module, and then transmitted to the computer in the shield main control room via the data transmission module and the Wi-Fi module for interpretation and processing.

[0038] The functions of the various components of the receiver unit are as follows: Receiving electrode access module, each measuring electrode 6 is connected to the shield main control room computer through this module, and is used for connecting the measuring electrode 6 with the receiver unit 5; The electrode information transmission module is used to transmit the connection mode of the receiving electrode on the receiver unit 5 and is reflected on the computer in the shield main control room. This module transmits the information to the computer in the shield main control room after the measuring electrode 6 is connected and the power switch is turned on; Wi-Fi module, used for wireless connection with the computer in the shield control room; GPS, for determining the geographic location of the receiver unit 5 .

[0039] The receiver unit 5 of this implementation is mounted on the shield machine. In this implementation, the receiving electrode unit must be arranged before detection, the shield main control room computer must be connected to the receiving electrode access module, and the power switch of the receiver unit must be turned on. The shield main control room computer is connected to the receiver unit 5. After the connection is completed, the electrode information transmission module will feed back the electrode access status to the shield main control room computer and display it in a specific software. The data measured during detection will be collected by the data acquisition module of the receiver unit 5, and then sent to the Wi-Fi module by the data transmission mode, and finally stored and reflected in the shield main control room computer.

[0040] In this implementation, the cable 4 of the transmitter unit 3 is connected to the computer in the shield machine's main control room, and when the transmitter unit 3 transmits current, the shield 7 and the shield cutter head 8 are powered by the power supply; more specifically, the power supply method of this implementation is that the transmitter unit 3 mounted in the shield machine's main control room 2 is connected to the shield 7 through the cable 4, and the shield machine's main control room computer in the main control room 2 controls the transmitter unit 3 to transmit current.

[0041] The electrode receiving unit in this implementation includes a measuring electrode 6, which is a common measuring electrode, which is arranged in the gap between the shield segment 1 behind the shield machine and arranged in three circles (the number of circles here can be set according to the detection requirements, for example, one circle, two circles, four circles or more circles can be set).

[0042] like Figure 3 As shown, before detection, the transmitter unit 3 located in the main control room 2 is connected to the shield 7 of the shield machine with a cable 4, so that the shield 7 and the shield cutter head 8 of the shield machine become power supply electrodes, and the power supply of the inner surface of the tunnel is realized. The measuring electrode 6 is inserted into the gap of the shield segment, connected to the receiver unit 5 with a cable, and the power of the receiver unit 5 is turned on to connect the receiver unit 5 to the computer of the shield main control room through the Wi-Fi module. After the connection of each device is completed, the computer of the shield main control room in the main control room controls the transmitter unit 3 to transmit current and receives the data obtained by the receiver unit 5. Then, the specific situation of the area to be measured 9 in front of the heading face is determined by analysis and processing, and relevant disposal is made.

[0043] During detection, since the shield cutter head 8 and shield guard 7 are used as power supply electrodes, the shield machine does not need to retract. The detection method to be used is determined, and the measuring electrode 6 is arranged in the gap of the shield segment. The measuring electrode 6 is connected to the receiver unit 5. The transmitter unit 3 is connected to the shield cutter head 8 through a rotating power supply device and then the equipment in the tunnel is debugged. After the wireless connection is good, the transmission parameters are set through the computer in the shield control room. After that, the transmitter unit is controlled by the computer in the shield control room to transmit and start the detection operation. After the detection is completed, the collected data is processed in time in the computer in the shield control room, and a decision is made after the specific situation of the target area is obtained to decide whether the shield should continue to advance.

[0044] Specifically, Figure 4 As shown, the shield machine stops excavating, determines the detection mode, arranges the measuring electrodes at the shield tail, connects the receiver to the electrodes, connects the transmitter to the electrodes, connects the computer, sets the detection parameters, performs detection operations, analyzes the results, and determines whether excavation can continue. If so, the shield machine continues excavating. If not, the shield machine continues excavating after dealing with abnormalities in the detection area.

[0045] More specifically, this implementation provides a specific working method of the following device, including: Step 1: Lay out electrodes and connect instruments. In the shield machine, connect the transmitter unit 3 to the shield 7. The shield cutter head 8 and the shield 7 act as power supply electrodes, and the connection method is to connect them with cables. At the rear of the shield machine, arrange the measuring electrode 6 in the gap of the shield segment, lay out three circles, and connect it to the receiver unit 5.

[0046] Step 2: Turn on the instrument, connect the transmitter unit 3 to the external power supply, turn on the switch of the transmitter unit 3, wait for the indicator light to light up red, turn on the power switch of the receiver unit 5, connect the receiver unit 5 and the computer in the shield control room with a Wi-Fi module, start the detection software in the computer in the shield control room, and prepare for the detection operation; Step 3: Set the transmission parameters. After connecting the transmitter unit 3, the receiver unit 5 and the shield control room computer, select the transmission mode, duty cycle, power supply cycle, power supply and acquisition channel number of the transmitter unit 3 through the shield control room computer in the main control room; Step 4: Detection and measurement. After confirming that there are no construction workers at the shield cutter head 8 and the shield 7, start detection. The computer in the shield main control room in the main control room controls the constant current high-power transmission module to transmit current, and checks the indicator light of the transmitter unit 3, which is green at this time.

[0047] Step 5: View and save data. All data during detection will be stored in the computer in the shield main control room. The detection data will be processed by specific data processing software in the computer in the shield main control room to illustrate the specific situation of the area to be tested 9.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An electrical detection device with a shield cutterhead and a shield as power supply electrodes, characterized in that: include: A transmitter unit, a receiver unit, a transmitting electrode unit and a receiving electrode unit; The transmitter unit mounted in the main control room of the shield machine is connected to the transmitting electrode unit through a cable, and the transmitting electrode unit is a shield cutter head and a shield; The receiver unit arranged on the shield machine is connected to the receiving electrode unit through a cable. The receiving electrode unit includes a plurality of receiving electrodes arranged in the gaps of the shield segments.

2. The electrical detection device with the shield cutter head and shield as power supply electrodes as claimed in claim 1 is characterized in that: The transmitter unit includes: a power filter module, a power switch, a signal interpretation module, a constant voltage control module, a constant current control module, a current data receiving module, a voltage data receiving module and a transmitting switch, wherein the AC power supply is connected to the power filter module, the power filter module is connected to the power switch, and the power switch is connected to the signal interpretation module; The signal interpretation module is connected to the constant voltage control module and the constant current control module respectively, the constant voltage control module and the constant current control module are connected to the transmitting switch respectively, and the transmitting switch is connected to the transmitting electrode unit; The current data receiving module, the voltage data receiving module and the signal interpretation module are respectively connected to the computer of the shield main control room.

3. The electrical detection device with the shield cutter head and shield as power supply electrodes as claimed in claim 2 is characterized in that: The signal interpretation module is used to receive the transmission signal set in the computer of the shield main control room and control the transmission work of the constant voltage control module or the constant current control module.

4. The electrical detection device with the shield cutter head and shield as power supply electrodes as claimed in claim 2, characterized in that: The constant voltage control module and the constant current control module of the transmitter unit are used to execute the set transmission task and control the magnitude of the transmission current and the transmission voltage.

5. The electrical detection device with the shield cutter head and shield as power supply electrodes as claimed in claim 2, characterized in that: The transmitter unit also includes an indicator light, which is used to indicate the state of the transmitter unit. The off state indicates that the transmitter unit is turned off and not connected to the power supply. The first color state indicates that the power supply is connected but not transmitting. The second color state indicates that the transmitter unit is transmitting.

6. The electrical detection device with the shield cutter head and shield as power supply electrodes as claimed in claim 2, characterized in that: The current data receiving module and the voltage data receiving module are used to collect the emitted current and voltage after the transmitter unit emits current, and transmit them to the shield main control room computer. The shield main control room computer displays the actual emission signal of the transmitter unit.

7. The electrical detection device with the shield cutter head and shield as power supply electrodes as described in any one of claims 1 to 6, characterized in that: The receiver unit includes: a power switch module, a data acquisition module, a Wi-Fi module, a GPS, a data transmission module, an electrode information transmission module and a receiving electrode access module; The data acquisition module is connected to the data transmission module, the data transmission module is connected to the Wi-Fi module, the Wi-Fi module is connected to the computer of the shield main control room, the receiving electrode access module is connected to each receiving electrode, the receiving electrode access module is connected to the electrode information transmission module, and the electrode information transmission module is connected to the computer of the shield main control room.

8. The electrical detection device with the shield cutter head and shield as power supply electrodes as described in any one of claims 1 to 6, characterized in that: The receiving electrode unit includes a plurality of independent electrodes, and each independent electrode is arranged in a plurality of circles in the gap of the shield segment.

9. A shield machine, characterized in that: The shield machine is equipped with an electrical detection device in which the shield cutter head and shield as power supply electrodes are described in any one of claims 1 to 8.

10. An operating method of an electrical detection device with a shield cutterhead and a shield as power supply electrodes, characterized in that: An electrical detection device using the shield cutterhead and shield as described in any one of claims 1 to 8 as power supply electrodes, The process includes: In the shield machine, the transmitter unit is connected to the shield of the shield machine. The shield cutterhead and the shield of the shield machine act as power supply electrodes. At the rear of the shield machine, the measuring electrodes are arranged in the gaps of the shield segments in three circles and connected to the receiver unit. Connect the transmitter unit to the external power supply, turn on the transmitter unit, wait for the indicator light to light up red, turn on the power switch of the receiver unit, connect the receiver unit and the computer in the shield control room with a Wi-Fi module, start the detection software in the computer in the shield control room, and prepare for the detection operation; After the transmitter unit, the receiver unit and the shield control room computer are connected, the transmission mode, duty cycle, power supply cycle, power supply and acquisition channel number of the transmitter unit are selected through the shield control room computer in the main control room; After confirming that there are no construction workers at the shield cutterhead and shield, detection begins. The shield main control room computer in the main control room controls the constant current high-power transmission module to transmit current, and checks the indicator light of the transmitter unit, which is green at this time; All data from the detection will be stored in the computer in the shield main control room. The detection data will be processed by specific data processing software in the computer in the shield main control room to obtain the specific situation of the detection area.

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