CN117890394A - Device and method for detecting mud cake of shield cutter head - Google Patents
Device and method for detecting mud cake of shield cutter head Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000002689 soil Substances 0.000 claims abstract description 108
- 239000000523 sample Substances 0.000 claims abstract description 99
- 238000001514 detection method Methods 0.000 claims abstract description 66
- 230000000903 blocking effect Effects 0.000 claims abstract description 23
- 230000005540 biological transmission Effects 0.000 claims abstract description 18
- 230000008859 change Effects 0.000 claims abstract description 9
- 238000005070 sampling Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 230000015572 biosynthetic process Effects 0.000 claims description 9
- 239000011499 joint compound Substances 0.000 description 45
- 238000010276 construction Methods 0.000 description 7
- 238000012544 monitoring process Methods 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 238000002310 reflectometry Methods 0.000 description 5
- 230000006872 improvement Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
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- 230000000739 chaotic effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
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Abstract
The application provides a device and a method for detecting mud cake of a shield cutter disc, belongs to the field of shield cutter disc detection, and solves the problems of large detection error and low efficiency of mud cake of the shield cutter disc. The detection device comprises: the soil blocking box is fixedly provided with a telescopic motor and an opening, the telescopic end of the telescopic motor is connected with a probe, one end of the probe, which is away from the telescopic motor, is provided with a plurality of probes, and the probes are aligned with the opening; the data sampling device and the data exciter are both arranged outside the soil blocking box, the data sampling device is connected with the data exciter, the data exciter is connected with a coaxial cable, the coaxial cable is provided with BNC connectors, each probe is respectively connected with a connecting wire, the connecting wires extend to the outside of the soil blocking box and are connected with a data transmission line, and the other end of the data transmission line is connected with the BNC connectors; the probe can move outside the soil retaining box along with the change of the telescopic quantity of the telescopic end of the telescopic motor. The application can improve the efficiency and accuracy of mud cake detection.
Description
Technical Field
The application belongs to the technical field of shield cutter head detection, and particularly relates to a device and a method for detecting mud cake formation of a shield cutter head.
Background
Along with the improvement of urban traffic demand in China, the excavation of underground traffic pipelines by adopting a large-diameter slurry shield becomes the main direction of underground space construction. The large-diameter slurry shield excavation can be used for various construction problems, especially when shield construction is carried out in a composite stratum or soft clay, soil and mud water mixture on the cutterhead is adhered to the cutterhead in the rotating process of the cutterhead, and the construction problems of mud cake formation are generated. The mud cake of the shield cutter disc not only affects the service life of the cutter, but also greatly prolongs the shield construction period, and is a type of problem which is difficult to treat in the shield construction problem. The existing method for monitoring the mud cake of the shield cutter disc mostly adopts machine sampling, and judges whether the mud cake is generated on the shield cutter disc by manual detection or according to an engineering experience method, and the method has the defects of low efficiency, large result error and the like.
Therefore, a detection device applied to a large-diameter slurry shield cutterhead to realize dynamic monitoring of mud cake of the shield cutterhead is needed.
Disclosure of Invention
In view of the above, the application provides a device and a method for detecting mud cake of a shield cutter disc, which are used for solving the problems of large detection error and low efficiency of mud cake of the shield cutter disc.
The technical scheme adopted by the application for solving the technical problems is as follows:
In a first aspect, the present application provides a device for detecting mud cake of a shield cutter disc, comprising:
The soil blocking box is characterized in that one side in the soil blocking box is fixedly provided with a telescopic motor, the other side is provided with an opening, the telescopic end of the telescopic motor is connected with a probe, one end of the probe, which is away from the telescopic motor, is provided with a plurality of probes, and the probes are aligned and matched with the opening;
The data sampling device and the data exciter are arranged outside the soil blocking box, the data sampling device is connected with the data exciter through a coaxial line, the data exciter is connected with a coaxial cable, the tail end of the coaxial cable is provided with a BNC connector, each probe is respectively connected with a connecting wire, the connecting wires extend to the outside of the soil blocking box and are connected with a data transmission line, and the other end of the data transmission line is connected with the BNC connector;
wherein, the probe can be along with flexible volume change of flexible end of flexible motor is in the soil retaining box outside removes.
In some embodiments of the present application, the soil blocking box includes a bottom plate and a cover plate, the bottom plate is disposed opposite to the cover plate, and the opening is formed on the cover plate.
In some embodiments of the present application, the connection wire extends through the bottom plate to the outside of the soil blocking box and is electrically connected to the data exciter and the data sampler in sequence through the data transmission line.
In some embodiments of the present application, the opening is embedded with a rubber ring, the rubber ring has an axial direction, and two sides of the rubber ring extend to two sides of the opening and are fixed with the cover plate respectively along the axial direction.
In some embodiments of the present application, the telescopic motor is connected to a flat plate connector, the flat plate connector is fixed on the base plate through a hexagonal threaded connector, and an electric wire of the telescopic motor extends to the outside of the soil retaining box through the base plate and is connected to a telescopic motor power supply.
In some embodiments of the present application, the probe includes a connection board, one side of the connection board is fixedly connected with the tail of the probe, and the other side is provided with two connectors which are oppositely arranged; the telescopic motor is characterized in that a telescopic motor connector is arranged at the telescopic end of the telescopic motor, the telescopic motor connector extends to the position between the connectors, and two sides of the telescopic motor connector are connected with the connectors respectively.
In some embodiments of the present application, the head of the probe is exposed from the opening when the amount of telescoping of the telescoping end of the telescoping motor is at a minimum.
In some embodiments of the application, the head of the probe is tapered.
In a second aspect, an embodiment of the present application further provides a method for detecting a mud cake of a shield cutter disc, which is applied to the device for detecting a mud cake of a shield cutter disc according to the first aspect, where the detection method includes:
Installing the shield cutter disc mud cake detection device on a cutter disc and starting the shield cutter disc mud cake detection device;
controlling the telescopic motor to push the probe to move towards the direction of the opening, and enabling the probe to move towards the direction deviating from the telescopic motor and to be inserted into the detection soil until the telescopic end of the telescopic motor reaches the maximum telescopic amount;
The data exciter is controlled to generate pulse electromagnetic waves and output the pulse electromagnetic waves through the probe, the obtained reflected signals are transmitted to the data sampler, and the data sampler generates waveform curves according to the reflected signals;
and analyzing and detecting the water content of the detection soil and predicting the condition of mud cake formation of the shield cutter head according to the waveform curve.
In some embodiments of the present application, before the step of analyzing and detecting the water content of the probe soil and predicting the mud cake of the shield cutter according to the waveform curve, the method further includes:
When the waveform curve tends to be stable, the telescopic end of the telescopic motor is controlled to shrink, the probe is pulled back to the initial position, the probe retracts towards the soil retaining box through the opening, and the telescopic motor stretches out and draws back until the telescopic motor stretches out and draws back to the minimum telescopic amount.
In summary, due to the adoption of the technical scheme, the application at least comprises the following beneficial effects:
the application provides a device and a method for detecting mud cake of a shield cutter disc, which mainly comprise the steps of driving a probe to stretch and move by using a stretching motor, so that the probe can be inserted into detection soil, realizing detection of different depths of the detection soil, realizing a detection function by electrically connecting the probe with a data sampler and a data exciter, generating pulse electromagnetic waves by using the data exciter, outputting by the probe, obtaining a reflected signal, feeding back to the data sampler, generating a waveform curve, and analyzing and monitoring the condition of mud cake according to the waveform curve in real time. The detection device comprises a data sampler, a data exciter and a probe, wherein the data sampler, the data exciter and the probe are electrically connected, the data exciter is used for emitting pulse electromagnetic waves, the pulse electromagnetic waves are transmitted into detection soil through the probe, detection of the detection soil is achieved, certain reaction is generated when the detection soil receives the pulse electromagnetic waves, the reaction is a reflection signal, the reaction is transmitted into the data sampler through the probe, the data sampler generates a waveform curve according to the reflection signal, the monitoring of the water content of the detection soil can be achieved through the waveform curve, and then the current forming condition of a mud cake is obtained.
Drawings
For a clearer description of an embodiment of the application, reference will be made to the accompanying drawings of embodiments, which are given for clarity, wherein:
fig. 1 is a schematic structural diagram of a mud cake detection device of a shield cutter head provided by an embodiment of the application;
fig. 2 is an internal construction diagram of a mud cake detection device of a shield cutter disc provided by an embodiment of the application;
FIG. 3 is a schematic perspective view of the inside of the soil blocking box according to the embodiment of the present application;
FIG. 4 is a schematic structural view of a flat panel connector according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a probe according to an embodiment of the present application.
Reference numerals illustrate:
1. A data sampler; 2. a data energizer; 3. a coaxial line; 4. a coaxial cable; 5. BNC connector; 6. a data transmission line; 7. a telescopic motor power supply; 8. a soil blocking box; 9. a bottom plate; 10. a probe; 11. a cover plate; 12. a telescopic motor; 13. a telescopic motor joint; 14. lengthening the hexagonal threaded connecting piece; 15. a rubber ring; 18. a flat panel connector; 19. a hexagonal threaded connection; 23. a positioning groove; 24. a connecting plate; 25. a probe; 28. a joint; 30. and connecting wires.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application.
In the description of the present application, it should be understood that the words "first" and "second" are used for descriptive purposes only and are not to be interpreted as indicating or implying a relative importance or number of features in which such is indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more features. In the description of the present application, the meaning of "plurality" is two or more, unless explicitly defined otherwise.
In the present application, the term "exemplary" is used to mean "serving as an example, instance, or illustration. Any embodiment described as exemplary in this disclosure is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is presented to enable any person skilled in the art to make and use the application. In the following description, details are set forth for purposes of explanation. It will be apparent to one of ordinary skill in the art that the present application may be practiced without these specific details. In other instances, well-known structures and processes have not been described in detail so as not to obscure the description of the application with unnecessary detail. Thus, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles disclosed herein.
Referring to fig. 1 to 5, an embodiment of the present application provides a device for detecting mud cake of a shield cutter disc, including:
the soil retaining box 8, one side in the soil retaining box 8 is fixed with a telescopic motor 12, the other side is provided with an opening, the telescopic end of the telescopic motor 12 is connected with a probe 10, one end of the probe 10, which is away from the telescopic motor 12, is provided with a plurality of probes 25, and the probes 25 are aligned and matched with the opening; it should be noted that, the soil retaining box 8 is generally disposed at the front of the shield machine, for preventing soil layer collapse and mud flow out, and may also provide support to ensure stability of the shield machine during the excavation process.
The data sampler 1 and the data exciter 2 are arranged outside the soil-blocking box 8, the data sampler 1 is connected with the data exciter 2 through a coaxial line 3, the data exciter 2 is connected with a coaxial cable 4, the tail end of the coaxial cable 4 is provided with BNC (Bayonet Nut Connector) joints, each probe 25 is respectively connected with a connecting wire 30, the connecting wires 30 extend to the outside of the soil-blocking box 8 and are connected with a data transmission line 6, and the other end of the data transmission line 6 is connected with the BNC joints 5;
wherein the probe 25 is movable outside the soil blocking box 8 with the amount of telescoping of the telescoping end of the telescoping motor 12.
The technical scheme provided by the application mainly comprises that the probe 25 is driven to move in an extending and retracting way by utilizing the extending and retracting motor 12, so that the probe 25 can be inserted into detection soil, detection of different depths is realized on the detection soil, the detection function is realized by electrically connecting the probe 25 with the data sampler 1 and the data exciter 2, generating pulse electromagnetic waves by utilizing the data exciter 2, outputting the pulse electromagnetic waves by utilizing the probe 25, obtaining a reflected signal, feeding back the reflected signal to the data sampler 1, generating a waveform curve, and analyzing and monitoring the condition of a mud cake in real time according to the waveform curve. In detail, the data sampler 1, the data exciter 2 and the probe 25 are electrically connected, then the data exciter 2 is used for transmitting pulse electromagnetic waves, the probe 25 is used for transmitting the pulse electromagnetic waves into the detection soil, so that detection of the detection soil is realized, when the detection soil receives the pulse electromagnetic waves, certain reaction is generated, the reaction is a reflection signal, the reaction is transmitted into the data sampler 1 through the probe 25, the data sampler 1 generates a waveform curve according to the reflection signal, the monitoring of the water content of the detection soil can be realized by utilizing the waveform curve, and then the current forming condition of a mud cake is obtained.
It should be noted that, the detection analysis of the mud cake detection device of the shield cutter disc is mainly based on the TDR (Time-Domain Reflectometry) principle. The TDR principle is a time domain reflectometry technology, which is a remote control measurement technology for analyzing reflected waves, and the condition of an object to be measured is mastered through the remote control position; the TDR (Time Domain Reflectometry) time domain reflectometry technique is based on the principle that a signal is transmitted in a certain transmission path, and when the impedance of the transmission path changes, a part of the signal is reflected, and another part of the signal continues to be transmitted along the transmission path. TDR is the measurement of the voltage amplitude of the reflected wave, so as to calculate the change of impedance; meanwhile, the position of the impedance change point in the transmission path can be calculated by measuring the time value from the reflection point to the signal output point. The TDR time domain reflectometer transmits a low voltage pulse to the cable under test and, in the event of a change in impedance within the cable, a reflection is seen. TDR time domain reflectometry TDR tests the time between release of the reflection and release of the low voltage pulse. By measuring the time and knowing the propagation speed of the pulse, the distance to reflection can be calculated, resulting in the cable length or the fault point distance. Information of impedance changes or fault types which may occur in the cable can also be judged according to different transmission waveforms.
In order to facilitate understanding, the monitoring of the water content of the detection soil by using the waveform curve can be further realized, and then the current forming condition of the mud cake is further described in detail:
first, the data exciter 2 will emit a short pulse electromagnetic wave signal which is transmitted to the soil through the probe 10; the electromagnetic wave signal then propagates through the soil and when it encounters a different medium or moisture change in the soil, a portion of the signal is reflected back. These reflected signals contain information inside the soil; the probe 25 then receives these reflected signals and returns to the data sampler 1 for processing; then, the data sampler 1 generates a waveform curve according to the received reflected signal, wherein the curve reflects the change condition of the dielectric constant in the soil; then, by analyzing the waveform curve, we can know the distribution of the water content in the soil. The relation between the water content of the soil and the reflected signal is that the higher the water content, the larger the amplitude of the reflected signal, because the water changes the dielectric constant of the soil, the water has a higher dielectric constant in the electromagnetic wave propagation process, and the medium with a higher dielectric constant can cause the electromagnetic wave to be more damped and reflected. Specifically, as the electromagnetic wave passes through the soil, a portion of the energy is absorbed by the moisture in the soil, causing the electromagnetic wave to attenuate as it propagates through the soil. The higher the moisture content, the more moisture in the soil, so that the electromagnetic wave is damped more in the propagation process, and the amplitude of the reflected signal is relatively larger. In addition, the higher the moisture content, the greater the effective permittivity in the soil, and an increase in the effective permittivity results in a slower propagation speed of electromagnetic waves in the soil, thereby increasing the chance and magnitude of reflection. Thus, in general, the higher the water content, the greater the amplitude of the reflected signal. Finally, according to the water content of the soil, the forming condition of the mud cake can be predicted. The relation between the forming of the mud cake and the water content of the soil is as follows: soil with a higher water content can cause formation of mud cake to be blocked or incomplete, and soil with a lower water content is beneficial to formation of mud cake.
The dielectric constant of soil is a physical quantity describing the property of soil to electromagnetic wave propagation. The dielectric constant is the permittivity of the medium relative to vacuum. The dielectric constant of soil is affected by the moisture content of the soil, the type of soil, the structure of the soil particles, and the like. In general, the higher the moisture content in the soil, the greater the dielectric constant, since moisture has a higher dielectric constant for electromagnetic waves. In contrast, the dielectric constant of the soil particles is lower. This is because moisture fills the interstices between the soil particles, increasing the conductivity of the soil and thus the overall dielectric constant. Specifically, different types of soil have different response characteristics to the propagation of electromagnetic waves. For example, sandy soil typically contains less moisture and therefore has a lower dielectric constant; whereas clay generally contains more water and has a higher dielectric constant. In the detection of the mud cake of the shield cutter head, the water content condition of the soil can be deduced by measuring the dielectric constant change of the soil, so that the formation condition of the mud cake is predicted.
The following examples are described based on the disclosure of the above examples.
As an embodiment a, a shield cutter disc mud cake detection device based on the TDR principle includes: the data sampler 1, the data exciter 2 and the soil blocking box 8 are arranged outside the soil blocking box 8, one side in the soil blocking box 8 is provided with a bottom plate 9, and a telescopic motor 12 is fixed on the bottom plate 9.
As shown in fig. 4, the telescopic motor 12 is welded with a flat plate connecting piece 18, the flat plate connecting piece 18 is fixed on the bottom plate 9 by four hexagonal threaded connecting pieces 19 arranged at four corners, and the electric wire of the telescopic motor 12 penetrates through the bottom plate 9 and is connected with the telescopic motor power supply 7 outside the soil retaining box 8. Further, a positioning groove 23 is formed in the bottom plate 9, the flat plate connecting piece 18 is arranged in the positioning groove 23, positioning and auxiliary fixing effects of the flat plate connecting piece 18 in the mounting process are achieved through the positioning groove 23, and mounting efficiency is improved.
As shown in fig. 5, the telescopic end of the telescopic motor 12 is connected with a probe 10, three probes 25 are arranged at the front end of the probe 10 to form a three-needle probe, and the heads of the probes 25 are conical.
As shown in fig. 3, the probe 10 includes a flat connection board 24, one side of the connection board 24 is fixedly connected with the tail of a probe 25, two parallel joints 28 are arranged on the other side of the connection board 24, the connection board 24 and the joints 28 are made of insulating materials, and the connection board 24 and the joints 28 in the embodiment are made of epoxy resin materials; the telescopic end of the telescopic motor 12 is provided with a telescopic motor connector 13, the telescopic motor connector 13 extends between connectors 28, the telescopic motor connector 13 and the connectors 28 on two sides are fixedly connected together through a lengthened hexagonal threaded connector 14 in a penetrating manner, and the telescopic motor 12 is perpendicular to the lengthened hexagonal threaded connector 14.
The side opposite to the bottom plate 9 is a cover plate 11, the bottom plate 9 and the cover plate 11 are welded on the soil retaining box 8, and an opening matched with the probe 25 is formed in the cover plate 11. When the telescopic end of the telescopic motor 12 stretches, the probe 10 is driven to move towards one side of the opening of the soil blocking box 8, and the front end of the probe 25 extends out of the opening.
As shown in fig. 1 and 2, the data sampler 1 is connected with a data exciter 2 through a coaxial line 3, the data exciter 2 is connected with a coaxial cable 4, the tail end of the coaxial cable 4 is provided with a BNC connector 5, each probe 25 is correspondingly connected with a connecting wire 30, the connecting wires 30 are connected with a data transmission line 6 outside a soil blocking box 8, and the other end of the data transmission line 6 is connected with the BNC connector 5.
As another embodiment B, this embodiment B proposes a more specific device for detecting mud cake of a shield cutter disc based on the TDR principle on the basis of embodiment a.
The rubber ring 15 is embedded in the opening, the rubber ring 15 has an axial direction, and two sides of the rubber ring 15 extend to two sides of the opening respectively along the axial direction and are fixed with the cover plate 11. The rubber ring 15 has better elasticity, so that the rubber ring 15 can always fill the gap between the probe 25 and the opening, and prevent soil and groundwater from invading into the soil retaining box 8, thereby affecting the detection operation of the detection device.
When the telescoping length of the telescoping end of the telescoping motor 12 is the minimum (i.e., the telescoping amount is the minimum), the head of the probe 25 is exposed from the opening, the thickness of the rubber ring 15 in the opening aperture direction is large, and when the entire probe 25 moves outside the opening, the rubber ring 15 is stretched, and the thickness of the rubber ring 15 in the opening aperture direction is correspondingly reduced.
It should be noted that, in the present embodiment B, the same or similar parts as those in the embodiment a may be referred to each other, and will not be described in detail in the present application.
As another embodiment C, the method for using the shield cutter disc mud cake detection device based on the TDR principle set forth in embodiment a and embodiment B includes the following steps:
S1, installing a mud cake detection device of a shield cutter head on the cutter head and starting the mud cake detection device of the shield cutter head;
S2, controlling the telescopic motor to push the probe to move towards the direction of the opening, and enabling the probe to move towards the direction away from the telescopic motor and to be inserted into the detection soil until the telescopic end of the telescopic motor reaches the maximum telescopic amount;
S3, controlling the data exciter to generate pulse electromagnetic waves and outputting the pulse electromagnetic waves through the probe, transmitting the obtained reflected signals to the data sampler, and generating a waveform curve according to the reflected signals by the data sampler;
s4, analyzing and detecting the water content of the detection soil according to the waveform curve and predicting the condition of mud cake formation of the shield cutter head.
For the above steps, in detail: firstly, mounting a mud cake detection device of a shield cutter head on the cutter head; secondly, the shield machine enters a detection position, stops running, and starts a shield cutter disc mud cake detection device; thirdly, the telescopic motor 12 pushes the probe 10 to move forwards, the probe 25 stretches out of the opening and is inserted into the detection soil body until the telescopic motor 12 runs to the maximum stroke (namely the maximum telescopic amount); fourth, the data exciter 2 generates pulse electromagnetic waves and outputs the pulse electromagnetic waves through the probe 25, the pulse electromagnetic waves in the reflected signals obtained by the probe 25 are transmitted to the data sampler 1, and the signal sampler 1 collects the reflected pulse electromagnetic waves through the coaxial line 3 to form a waveform curve; fifthly, according to the acquired information obtained by the data sampler 1, the water content of the soil is analyzed and detected by utilizing the principle that the dielectric constants of different soils are different, so that the condition of mud cake formation of the shield cutter disc is predicted.
For the above-mentioned embodiment, the probe 25 is inserted into the soil body for detection, which has at least the following advantages compared to the detection directly through the probe 25 outside the soil body: although the electromagnetic waves emitted by the probe 25 may propagate without a medium, some interactions, such as absorption, scattering, reflection, refraction, etc., of the electromagnetic waves by the medium may occur when the electromagnetic waves encounter the medium. When electromagnetic waves are emitted directly outside the soil, the received signal is weakened and chaotic due to the reflection and scattering of part of the signal caused by the interface between air and soil. By inserting the probe 25 into the soil, the interaction of the electromagnetic wave with the soil can be better controlled, resulting in stronger signals and more accurate data. And the probe inserted into the soil can directly transmit electromagnetic waves to the deep layer of the soil, so that the depth detection of the internal structure and property of the soil is realized.
In some embodiments of the present application, before the step of analyzing and detecting the water content of the probe soil and predicting the mud cake of the shield cutter according to the waveform curve, the method further includes:
when the waveform curve tends to be stable, the telescopic end of the telescopic motor 12 is controlled to shrink, the probe 10 is pulled back to the initial position, and the probe 25 is retracted towards the telescopic motor 12 through the opening hole until the telescopic amount of the telescopic motor 12 reaches the minimum telescopic amount.
As another embodiment D, this embodiment D proposes a more specific method for using a mud cake detection device of a shield cutter disc based on the TDR principle on the basis of embodiment C.
When the waveform curve tends to be stable, the telescopic end of the telescopic motor 12 is controlled to shrink, the probe 10 is pulled back to the initial position, the probe 25 is retracted towards the soil blocking box 8 through the opening, and the rubber ring 15 scrapes off the soil stained on the surface of the probe 25 and leaves outside the soil blocking box 8 until the telescopic amount of the telescopic motor 12 reaches the minimum telescopic amount. After the probe 10 is pulled back to the initial position, the conical head of the probe 25 is always exposed outside the opening, the radial thickness of the rubber ring 15 is increased, the probe 25 is tightly wrapped, and the gap between the probe 25 and the opening is filled.
In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described by a difference from other embodiments, and identical and similar parts between the embodiments are referred to each other.
While the basic concepts have been described above, it will be apparent to those skilled in the art that the foregoing detailed disclosure is by way of example only and is not intended to be limiting. Although not explicitly described herein, various modifications, improvements and adaptations of the application may occur to one skilled in the art. Such modifications, improvements, and modifications are intended to be suggested within the present disclosure, and therefore, such modifications, improvements, and adaptations are intended to be within the spirit and scope of the exemplary embodiments of the present disclosure.
Meanwhile, the present application uses specific words to describe embodiments of the present application. Reference to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic is associated with at least one embodiment of the application. Thus, it should be emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various positions in this specification are not necessarily referring to the same embodiment. Furthermore, certain features, structures, or characteristics of one or more embodiments of the application may be combined as suitable.
Each patent, patent application publication, and other material, such as articles, books, specifications, publications, documents, etc., that are cited herein are hereby incorporated by reference in their entirety except for application history documents that are inconsistent or otherwise conflict with the present disclosure. It is noted that the description, definition, and/or use of the term in the appended claims controls the description, definition, and/or use of the term in this application if the description, definition, and/or use of the term in the appended claims does not conform to or conflict with the present disclosure.
Claims (10)
1. The utility model provides a shield constructs blade disc mud cake detection device which characterized in that includes:
The soil blocking box is characterized in that one side in the soil blocking box is fixedly provided with a telescopic motor, the other side is provided with an opening, the telescopic end of the telescopic motor is connected with a probe, one end of the probe, which is away from the telescopic motor, is provided with a plurality of probes, and the probes are aligned and matched with the opening;
The data sampling device and the data exciter are arranged outside the soil blocking box, the data sampling device is connected with the data exciter through a coaxial line, the data exciter is connected with a coaxial cable, the tail end of the coaxial cable is provided with a BNC connector, each probe is respectively connected with a connecting wire, the connecting wires extend to the outside of the soil blocking box and are connected with a data transmission line, and the other end of the data transmission line is connected with the BNC connector;
wherein, the probe can be along with flexible volume change of flexible end of flexible motor is in the soil retaining box outside removes.
2. The shield cutter head mud cake detection device according to claim 1, wherein the soil retaining box comprises a bottom plate and a cover plate, the bottom plate is arranged opposite to the cover plate, and the opening is formed in the cover plate.
3. The shield cutter head mud cake detection device according to claim 2, wherein the connecting wire extends to the outside of the soil retaining box through the bottom plate, and is electrically connected with the data exciter and the data sampler in sequence through the data transmission line.
4. The shield cutter head mud cake detection device according to claim 2, wherein the opening is embedded with a rubber ring, the rubber ring has an axial direction, and two sides of the rubber ring extend to two sides of the opening respectively along the axial direction and are fixed with the cover plate.
5. The shield cutter head mud cake detection device according to claim 2, wherein the telescopic motor is connected with a plane plate connecting piece, the plane plate connecting piece is fixed on the bottom plate through a hexagonal threaded connecting piece, and an electric wire of the telescopic motor penetrates through the bottom plate to extend to the outside of the soil retaining box and is connected with a telescopic motor power supply.
6. The shield cutter disc mud cake detection device according to claim 1, wherein the probe comprises a connecting plate, one side of the connecting plate is fixedly connected with the tail part of the probe, and two connectors which are oppositely arranged are arranged on the other side of the connecting plate; the telescopic motor is characterized in that a telescopic motor connector is arranged at the telescopic end of the telescopic motor, the telescopic motor connector extends to the position between the connectors, and two sides of the telescopic motor connector are connected with the connectors respectively.
7. The shield cutter head mud cake detection device according to claim 1, wherein the head of the probe is exposed from the opening when the amount of expansion of the expansion end of the expansion motor is a minimum.
8. The shield cutter disc mud cake detection apparatus of any one of claims 1 to 7, wherein the head of the probe is tapered.
9. A method for detecting mud cake of a shield cutter disc, which is applied to the device for detecting mud cake of a shield cutter disc according to any one of claims 1 to 8, and comprises the following steps:
Installing the shield cutter disc mud cake detection device on a cutter disc and starting the shield cutter disc mud cake detection device;
controlling the telescopic motor to push the probe to move towards the direction of the opening, and enabling the probe to move towards the direction deviating from the telescopic motor and to be inserted into the detection soil until the telescopic end of the telescopic motor reaches the maximum telescopic amount;
The data exciter is controlled to generate pulse electromagnetic waves and output the pulse electromagnetic waves through the probe, the obtained reflected signals are transmitted to the data sampler, and the data sampler generates waveform curves according to the reflected signals;
and analyzing and detecting the water content of the detection soil and predicting the condition of mud cake formation of the shield cutter head according to the waveform curve.
10. The method for detecting mud cake of shield cutter head according to claim 9, further comprising, before said step of analytically detecting the water content of the detected soil and predicting the mud cake of the shield cutter head based on the waveform profile:
When the waveform curve tends to be stable, the telescopic end of the telescopic motor is controlled to shrink, the probe is pulled back to the initial position, the probe retracts towards the soil retaining box through the opening, and the telescopic motor stretches out and draws back until the telescopic motor stretches out and draws back to the minimum telescopic amount.
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Citations (32)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6215317B1 (en) * | 1999-04-27 | 2001-04-10 | Purdue Research Foundation | Method and apparatus for measuring in-place density and moisture content |
| CN101210899A (en) * | 2006-12-27 | 2008-07-02 | 中国科学院沈阳应用生态研究所 | Method for determining soil moisture and its modified device |
| CN101216444A (en) * | 2008-01-16 | 2008-07-09 | 浙江大学 | Soil pore water conductivity multi-point automatic monitoring apparatus |
| CN101487803A (en) * | 2009-03-09 | 2009-07-22 | 北京师范大学 | Portable soil profile diagnosis scanner |
| CN101907658A (en) * | 2010-07-20 | 2010-12-08 | 浙江大学 | Device for testing dielectric constant of soil body by electromagnetic wave |
| CN103278437A (en) * | 2013-05-29 | 2013-09-04 | 浙江大学 | Simulation test device for muddy water shield mud membrane formation process |
| CN106546609A (en) * | 2016-09-21 | 2017-03-29 | 贵州师范大学 | A kind of TDR soil moisture measurement devices suitable for Rocky Desertification Region |
| CN106950161A (en) * | 2017-05-10 | 2017-07-14 | 成都冠禹科技有限公司 | A kind of comprehensive soil moisture detection device |
| CN107907597A (en) * | 2017-11-27 | 2018-04-13 | 山东大学 | A kind of penetration type ultrasonic wave soil moisture content test device and method |
| CN108318077A (en) * | 2016-12-30 | 2018-07-24 | 明光市泰丰新材料有限公司 | A kind of soil monitoring device |
| CN108519473A (en) * | 2018-03-09 | 2018-09-11 | 广州地理研究所 | A kind of alkaline land soil water content rapid detection system |
| CN108692973A (en) * | 2018-05-29 | 2018-10-23 | 太原理工大学 | A kind of drilling TDR device and methods suitable for special undisturbed soil |
| CN110988980A (en) * | 2019-12-23 | 2020-04-10 | 山东大学 | Phased array sound wave advanced geological detection system and method carried by shield tunneling machine |
| CN211144493U (en) * | 2019-11-22 | 2020-07-31 | 中铁工程装备集团有限公司 | Measuring device suitable for soil bin/muddy water bin muck water content of shield machine |
| CN111735843A (en) * | 2020-07-05 | 2020-10-02 | 南京林业大学 | Casing pipe type soil body one-dimensional hydrothermal migration testing device and testing method |
| CN113189144A (en) * | 2021-04-23 | 2021-07-30 | 浙江绿农生态环境有限公司 | Soil pollution detection device based on TDR sensor |
| KR20210112301A (en) * | 2019-03-11 | 2021-09-14 | 하우징 앤드 디벨로프먼트 보드 | Apparatus, system and method for classification of soils and soil types |
| CN214224906U (en) * | 2020-12-25 | 2021-09-17 | 中铁十四局集团大盾构工程有限公司 | Test device for measuring tangential adhesion of soil and solid interface |
| CN215768576U (en) * | 2021-08-23 | 2022-02-08 | 中国水利水电第四工程局有限公司 | Dam building site soil property detection device |
| CN114088776A (en) * | 2021-12-21 | 2022-02-25 | 信阳师范学院 | Deep profile soil water content distribution monitoring device and system |
| CN216956027U (en) * | 2022-02-23 | 2022-07-12 | 高晋峰 | High-precision soil and water conservation monitoring device |
| CN114813431A (en) * | 2022-03-31 | 2022-07-29 | 南京林业大学 | Shield tunneling melting and slush-containing cake forming model test device and test method |
| CN217156249U (en) * | 2022-04-23 | 2022-08-09 | 西安建筑科技大学 | Measuring equipment for adhesive strength of cohesive soil and metal surface |
| CN217688940U (en) * | 2022-07-06 | 2022-10-28 | 河南省气象科学研究所 | Hand-held soil moisture measuring device |
| CN217981331U (en) * | 2022-07-21 | 2022-12-06 | 浙大城市学院 | Miniature TDR soil moisture content survey probe |
| CN115754221A (en) * | 2022-08-30 | 2023-03-07 | 沈阳一凡农业科技有限公司 | Stepping time domain reflection soil available nutrient in-situ rapid measurement system and method |
| CN116244642A (en) * | 2023-02-28 | 2023-06-09 | 西安建筑科技大学 | Intelligent shield blocking regulation and control system and method |
| CN219285186U (en) * | 2023-02-20 | 2023-06-30 | 中国地质调查局西安矿产资源调查中心 | Deep soil moisture normal position automatic monitoring device |
| CN116952678A (en) * | 2023-07-10 | 2023-10-27 | 中国科学院武汉岩土力学研究所 | Evaluation method for blocking risk degree of shield mud cake in cohesive soil stratum |
| CN220455314U (en) * | 2023-07-11 | 2024-02-06 | 河北大华景观工程有限公司 | Soil humidity detection device |
| CN117571608A (en) * | 2023-11-29 | 2024-02-20 | 西安建筑科技大学 | Device and method for measuring soil adhesion characteristics of shield cutter head and soil interface |
| CN117665261A (en) * | 2023-12-17 | 2024-03-08 | 山西农业大学 | Soil moisture comprehensive analyzer |
-
2024
- 2024-03-14 CN CN202410291858.1A patent/CN117890394A/en active Pending
Patent Citations (32)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6215317B1 (en) * | 1999-04-27 | 2001-04-10 | Purdue Research Foundation | Method and apparatus for measuring in-place density and moisture content |
| CN101210899A (en) * | 2006-12-27 | 2008-07-02 | 中国科学院沈阳应用生态研究所 | Method for determining soil moisture and its modified device |
| CN101216444A (en) * | 2008-01-16 | 2008-07-09 | 浙江大学 | Soil pore water conductivity multi-point automatic monitoring apparatus |
| CN101487803A (en) * | 2009-03-09 | 2009-07-22 | 北京师范大学 | Portable soil profile diagnosis scanner |
| CN101907658A (en) * | 2010-07-20 | 2010-12-08 | 浙江大学 | Device for testing dielectric constant of soil body by electromagnetic wave |
| CN103278437A (en) * | 2013-05-29 | 2013-09-04 | 浙江大学 | Simulation test device for muddy water shield mud membrane formation process |
| CN106546609A (en) * | 2016-09-21 | 2017-03-29 | 贵州师范大学 | A kind of TDR soil moisture measurement devices suitable for Rocky Desertification Region |
| CN108318077A (en) * | 2016-12-30 | 2018-07-24 | 明光市泰丰新材料有限公司 | A kind of soil monitoring device |
| CN106950161A (en) * | 2017-05-10 | 2017-07-14 | 成都冠禹科技有限公司 | A kind of comprehensive soil moisture detection device |
| CN107907597A (en) * | 2017-11-27 | 2018-04-13 | 山东大学 | A kind of penetration type ultrasonic wave soil moisture content test device and method |
| CN108519473A (en) * | 2018-03-09 | 2018-09-11 | 广州地理研究所 | A kind of alkaline land soil water content rapid detection system |
| CN108692973A (en) * | 2018-05-29 | 2018-10-23 | 太原理工大学 | A kind of drilling TDR device and methods suitable for special undisturbed soil |
| KR20210112301A (en) * | 2019-03-11 | 2021-09-14 | 하우징 앤드 디벨로프먼트 보드 | Apparatus, system and method for classification of soils and soil types |
| CN211144493U (en) * | 2019-11-22 | 2020-07-31 | 中铁工程装备集团有限公司 | Measuring device suitable for soil bin/muddy water bin muck water content of shield machine |
| CN110988980A (en) * | 2019-12-23 | 2020-04-10 | 山东大学 | Phased array sound wave advanced geological detection system and method carried by shield tunneling machine |
| CN111735843A (en) * | 2020-07-05 | 2020-10-02 | 南京林业大学 | Casing pipe type soil body one-dimensional hydrothermal migration testing device and testing method |
| CN214224906U (en) * | 2020-12-25 | 2021-09-17 | 中铁十四局集团大盾构工程有限公司 | Test device for measuring tangential adhesion of soil and solid interface |
| CN113189144A (en) * | 2021-04-23 | 2021-07-30 | 浙江绿农生态环境有限公司 | Soil pollution detection device based on TDR sensor |
| CN215768576U (en) * | 2021-08-23 | 2022-02-08 | 中国水利水电第四工程局有限公司 | Dam building site soil property detection device |
| CN114088776A (en) * | 2021-12-21 | 2022-02-25 | 信阳师范学院 | Deep profile soil water content distribution monitoring device and system |
| CN216956027U (en) * | 2022-02-23 | 2022-07-12 | 高晋峰 | High-precision soil and water conservation monitoring device |
| CN114813431A (en) * | 2022-03-31 | 2022-07-29 | 南京林业大学 | Shield tunneling melting and slush-containing cake forming model test device and test method |
| CN217156249U (en) * | 2022-04-23 | 2022-08-09 | 西安建筑科技大学 | Measuring equipment for adhesive strength of cohesive soil and metal surface |
| CN217688940U (en) * | 2022-07-06 | 2022-10-28 | 河南省气象科学研究所 | Hand-held soil moisture measuring device |
| CN217981331U (en) * | 2022-07-21 | 2022-12-06 | 浙大城市学院 | Miniature TDR soil moisture content survey probe |
| CN115754221A (en) * | 2022-08-30 | 2023-03-07 | 沈阳一凡农业科技有限公司 | Stepping time domain reflection soil available nutrient in-situ rapid measurement system and method |
| CN219285186U (en) * | 2023-02-20 | 2023-06-30 | 中国地质调查局西安矿产资源调查中心 | Deep soil moisture normal position automatic monitoring device |
| CN116244642A (en) * | 2023-02-28 | 2023-06-09 | 西安建筑科技大学 | Intelligent shield blocking regulation and control system and method |
| CN116952678A (en) * | 2023-07-10 | 2023-10-27 | 中国科学院武汉岩土力学研究所 | Evaluation method for blocking risk degree of shield mud cake in cohesive soil stratum |
| CN220455314U (en) * | 2023-07-11 | 2024-02-06 | 河北大华景观工程有限公司 | Soil humidity detection device |
| CN117571608A (en) * | 2023-11-29 | 2024-02-20 | 西安建筑科技大学 | Device and method for measuring soil adhesion characteristics of shield cutter head and soil interface |
| CN117665261A (en) * | 2023-12-17 | 2024-03-08 | 山西农业大学 | Soil moisture comprehensive analyzer |
Non-Patent Citations (3)
| Title |
|---|
| 方勇;王凯;陶力铭;刘鹏程;邓如勇;: "黏性地层面板式土压平衡盾构刀盘泥饼堵塞试验研究", 岩土工程学报, no. 09, 17 September 2020 (2020-09-17) * |
| 白洋: "基于"刀—土"相互作用的泥水盾构泥浆 渗透成膜机理及开挖面稳定性研究", 中国优秀博硕士学位论文全文数据库（博士）信息科技专辑, 1 December 2022 (2022-12-01) * |
| 白洋;蒋斌松;杨乐;季翔;陈肖雄;: "苏通GIL电力综合管廊大直径泥水盾构泥浆成膜特性试验研究", 水电能源科学, no. 09, 15 September 2020 (2020-09-15) * |
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