CN109459559B - Buried device for deep rock soil water potential sensor and test system - Google Patents
Buried device for deep rock soil water potential sensor and test system Download PDFInfo
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- CN109459559B CN109459559B CN201811590237.4A CN201811590237A CN109459559B CN 109459559 B CN109459559 B CN 109459559B CN 201811590237 A CN201811590237 A CN 201811590237A CN 109459559 B CN109459559 B CN 109459559B
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- 239000011435 rock Substances 0.000 title claims abstract description 122
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 109
- 239000002689 soil Substances 0.000 title claims abstract description 102
- 238000012360 testing method Methods 0.000 title claims abstract description 57
- 239000000919 ceramic Substances 0.000 abstract description 8
- 239000000843 powder Substances 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000005553 drilling Methods 0.000 abstract description 2
- 239000011159 matrix material Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 239000000523 sample Substances 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000001179 sorption measurement Methods 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
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/24—Earth materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
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- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention provides a burying device and a testing system for a deep rock soil water potential sensor, and relates to the field of rock soil detection. The buried device for the deep rock soil water potential sensor comprises a soil water potential sensor and a rock core, wherein the rock core is a raw rock sample of a rock layer to be tested, which is obtained by drilling, a mounting hole is formed in one end of the rock core, the soil water potential sensor is arranged in the mounting hole and is in interference fit with the mounting hole, and raw rock powder can be adopted between the soil water potential sensor and the mounting hole to be filled so as to ensure close fit. The burying device for the deep rock soil water potential sensor adopts the original rock core to pre-package the soil water potential sensor, so that the surrounding medium of the soil water potential sensor is completely consistent with the actual test rock, the fragile ceramic head sensor can be well protected, and the field on-site mounting burying is facilitated.
Description
Technical Field
The invention relates to the field of rock and soil detection, in particular to a burying device and a testing system for a deep rock and soil water potential sensor.
Background
The water-air interface in unsaturated soil forms a force called a matrix suction. The matrix suction force refers to the pressure difference value of pore gas and water in soil, and represents an important subject in unsaturated soil research and related engineering, wherein the adsorption capability of the soil to water is reflected.
At present, an unsaturated soil matrix suction force measurement is carried out by a soil-water potential sensor method. The working principle of the soil water potential sensor is that the suction force balance between the rock-soil body and the ceramic probe of the soil water potential sensor is utilized, and the suction force of the ceramic probe is obtained by measuring the water content of the ceramic probe, so that the suction force of the rock-soil body is further obtained.
The common probes of the soil water potential sensor are made of ceramic materials, have low strength and are extremely easy to crush, and are mostly used in shallow soil. For deep rock, the rock has high strength, and a fragile ceramic probe cannot be inserted into the rock; on the other hand, the soil water potential sensor is tested through medium suction balance, the suction balance level of different mediums is very different, and the consistency of the surrounding mediums of the soil water potential sensor and the tested deep rock mass is difficult to ensure in the prior art.
Disclosure of Invention
The invention aims to provide a burying device for a deep rock soil water potential sensor, which adopts a raw rock core to pre-package the soil water potential sensor, ensures that the surrounding medium of the soil water potential sensor is completely consistent with the rock to be tested, ensures the reliability of the test, can well protect a fragile ceramic head sensor, is convenient for field on-site installation and burying, and can test the deep rock.
The invention further aims to provide a testing system for the deep rock soil water potential sensor, which adopts the original rock core to pre-package the soil water potential sensor, so that the surrounding medium of the soil water potential sensor is completely consistent with the rock to be tested, the reliability of the test is ensured, the fragile ceramic head sensor can be well protected, the field on-site installation and embedding are facilitated, and the deep rock can be tested.
In order to achieve the above object, the present invention provides a technical solution:
the embodiment of the invention provides a burying device for a deep rock soil water potential sensor, which comprises a soil water potential sensor and a rock core, wherein a mounting hole is formed in one end of the rock core, the soil water potential sensor is arranged in the mounting hole, and the soil water potential sensor is in interference fit with the mounting hole.
Further, the core is far away from the other end of one end provided with the mounting hole and is provided with a connecting hole, and the connecting hole is communicated with the mounting hole.
Further, the aperture of the connecting hole is smaller than the aperture of the mounting hole.
Further, a cable is arranged on the soil water potential sensor, and one end of the cable extends out of the connecting hole.
Further, a connecting groove is formed in the outer wall of the rock core.
Further, the core has opposite first and second end faces, and the connecting slot extends through the first and second end faces.
Further, the connecting grooves are formed in a plurality, and the connecting grooves are formed in the outer wall of the rock core in the circumferential direction.
Further, the burying device for the deep rock soil water potential sensor further comprises a traction rope, and the traction rope stretches into the connecting groove so as to drive the rock core.
Further, the core is cylindrical.
The embodiment of the invention provides a test system for a deep rock soil water potential sensor, which comprises a rock body and a burying device. The buried device for the deep rock soil water potential sensor comprises a soil water potential sensor and a rock core, wherein a mounting hole is formed in one end of the rock core, the soil water potential sensor is arranged in the mounting hole, and the soil water potential sensor is in interference fit with the mounting hole. The rock body is provided with a test hole, and the rock core is positioned in the test hole and in interference fit with the test hole.
Compared with the prior art, the embedded device for the deep rock soil water potential sensor and the test system provided by the invention have the beneficial effects that:
according to the burying device and the testing system for the soil water potential sensor of the deep rock, the soil water potential sensor is mounted on the rock core obtained in the rock stratum to be tested, and the peripheral medium of the soil water potential sensor is completely consistent with the rock to be tested through the mounting holes formed in the rock core of the original rock so as to achieve medium balance, ensure the reliability of test data, play a role in protecting the soil water potential sensor, and achieve the purpose of effectively testing the matrix suction force of the deep rock.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a test system for a deep rock and soil water potential sensor according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of an embedded device for a deep rock-soil-water potential sensor according to an embodiment of the present invention;
FIG. 3 is a schematic view of a core of an embedded device for a deep rock and soil water potential sensor according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a soil-water potential sensor of an embedding device for a deep rock soil-water potential sensor according to an embodiment of the present invention.
Icon: 1-a test system for a deep rock soil water potential sensor; 2-rock body; 21-test wells; 3-burying device for deep rock soil water potential sensor; 31-a soil water potential sensor; 311-cables; 32-core; 321-mounting holes; 322-connecting holes; 323-connecting grooves; 324—a first end face; 325-a second end face; 33-hauling ropes.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "center", "upper", "lower", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships in which the inventive product is conventionally put in use, or the directions or positional relationships as conventionally understood by those skilled in the art are merely for convenience of describing the present invention and for simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "configured," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Examples
Referring to fig. 1, fig. 1 is a schematic structural diagram of a test system 1 for a deep rock-soil-water potential sensor according to an embodiment of the invention. The test system 1 for the deep rock soil water potential sensor is mainly applied to the matrix suction force of deep rock, and is a device capable of accurately measuring the performance of the deep rock.
The test system 1 for the deep rock soil water potential sensor comprises a rock body 2 and a buried device 3 for the deep rock soil water potential sensor, wherein the rock body 2 is provided with a test hole 21, the buried device 3 for the deep rock soil water potential sensor is positioned in the test hole 21 and is in interference fit with the test hole 21, and the buried device 3 for the deep rock soil water potential sensor is positioned at the bottom of the test hole 21.
The rock body 2 is mainly used for carrying an embedded device 3 for a deep rock soil water potential sensor and is kept in a tightly attached state with the embedded device. The embedded device 3 for the deep rock soil water potential sensor is mainly used for protecting an internal testing device, can be in a tightly attached state with the rock body 2, and can achieve the purpose of effectively testing the matrix suction force of the deep rock. The test system 1 for the deep rock soil water potential sensor can protect the soil water potential sensor 31 and test the deep rock, so that the reliability of a test result is ensured.
Referring to fig. 2, fig. 2 is a schematic structural diagram of an embedded device 3 for a deep rock-soil-water potential sensor according to an embodiment of the invention.
The buried device 3 for the deep rock soil water potential sensor comprises a soil water potential sensor 31 and a rock core 32, wherein a mounting hole 321 is formed in one end of the rock core 32, the soil water potential sensor 31 is arranged in the mounting hole 321, and the soil water potential sensor 31 is in interference fit with the mounting hole 321.
Note that, the land water potential sensor 31 and the mounting hole 321 can be filled with the raw rock powder to ensure close fitting.
The mounting hole 321 is substantially cylindrical and matches the outer shape of the soil water potential sensor 31. In this embodiment, the mounting hole 321 has a length of 60mm and a diameter of 15mm. It will be appreciated that in other embodiments, the size of the mounting hole 321 may be other, and it is necessary to keep close fit with the soil water potential sensor 31, that is, after the soil water potential sensor 31 is mounted in the mounting hole 321, the mounting hole 321 can be kept stationary relative to the mounting hole 321. The mounting hole 321 serves to protect the soil water potential sensor 31.
Fig. 3 is a schematic view of a core 32 of an embedded device 3 for a deep rock-soil-water sensor according to an embodiment of the present invention, and please refer to fig. 2 and 3 in combination.
The test hole 21 is formed after the core 32 is removed.
The core 32 is located in the test hole 21 and can be in interference fit with the test hole 21, so that the soil water potential sensor 31 can penetrate into the rock body 2, the core 32 and the test hole 21 are tightly attached, and in-situ test is performed, so that real and reliable test data can be obtained.
The core 32 is rock taken from the core position of the rock body 2, typically by drilling. The rock body 2 is located in the formation to be measured, the rock body 2 being known as the country rock.
It should be noted that, the original rock core 32 is adopted to pre-package the soil water potential sensor 31, so that the surrounding medium of the soil water potential sensor 31 is completely consistent with the rock to be tested, the reliability of the test is ensured, the fragile ceramic head sensor can be well protected, the field on-site installation and burying are facilitated, and the deep rock can be tested.
The core 32 is substantially cylindrical. The shape of the present invention is not limited to a cylindrical shape, and may be a rectangular parallelepiped shape or a prismatic shape, and the present invention is not limited to this.
In this embodiment, the core 32 has a length of 100 to 150mm and a diameter of 50 to 110mm. It will be appreciated that in other embodiments, the core 32 may be of other dimensions, just larger than the size of the soil water potential sensor 31.
Further, a connecting hole 322 is formed at the other end of the core 32 away from the end where the mounting hole 321 is formed, and the connecting hole 322 is communicated with the mounting hole 321.
The connection hole 322 is substantially cylindrical and is capable of allowing the connection line of the soil water potential sensor 31 to pass therethrough. In this embodiment, the connecting hole 322 has a length of 40-90mm and a diameter of 6mm. It is understood that in other embodiments, the size of the connecting hole 322 may be other sizes, so long as the connection line between the soil water potential sensor 31 and the outside can pass through.
The aperture of the connection hole 322 is smaller than the aperture of the mounting hole 321. The connection between the mounting hole 321 and the connecting hole 322 forms a limiting boss (not shown), and the soil water potential sensor 31 can contact with the limiting boss, and the limiting boss is used for limiting the movement of the soil water potential sensor 31.
Further, the outer wall of the core 32 is provided with a connection groove 323. The connecting grooves 323 are used for connection with the outside, so that the core 32 can be accurately placed in the test hole 21 for testing. When the core 32 is completely prevented from being placed in the test hole 21 until reaching the bottom of the test hole 21, the upper portion of the test hole 21 is sealed. The sealing is generally performed with virgin rock powder to ensure stability for long-term testing.
The core 32 has opposed first and second end faces 324, 325 with the connecting slot 323 extending through the first and second end faces 324, 325. The connecting groove 323 may have a substantially rectangular parallelepiped shape, or may have other shapes, for example, a circular shape, a triangular shape, or the like, and may be formed as long as the groove body is formed. It will be appreciated that in other embodiments, the connecting slot 323 may not extend through the first end face 324 and the second end face 325.
In the present embodiment, the connection groove 323 is in a vertical state on the outer wall of the core 32, i.e., vertically penetrates the first end face 324 and the second end face 325.
It should be noted that the connecting groove 323 may also be disposed on the outer wall of the core 32 in an oblique manner, i.e., obliquely penetrates the first end surface 324 and the second end surface 325.
Further, the plurality of connecting grooves 323 are provided, and the plurality of connecting grooves 323 are circumferentially formed on the outer wall of the core 32. The number of the connection grooves 323 may be two, three or even more, and is not particularly limited herein, and in the present embodiment, the number of the connection grooves 323 is four.
Fig. 4 is a schematic structural diagram of a soil-water potential sensor 31 of an embedding device 3 for a deep rock soil-water potential sensor according to an embodiment of the present invention, and please refer to fig. 2 and 4 in combination.
The soil-water potential sensor 31 is substantially cylindrical and matches the outer shape of the mounting hole 321. In this embodiment, the soil water potential sensor 31 has a length of 60mm and a diameter of 15mm. It will be appreciated that in other embodiments, the soil water potential sensor 31 may be sized to other dimensions, depending on the particular model employed.
The soil water potential sensor 31 is provided with a cable 311, and one end of the cable 311 extends out of the connecting hole 322.
The cable 311 serves to signal data detected by the end of the soil-water potential sensor 31.
With continued reference to fig. 2, the burying device 3 for a deep rock-soil-water potential sensor further includes a pulling rope 33, where the pulling rope 33 extends into the connecting groove 323 to drive the core 32.
The traction rope 33 extends into the connecting groove 323, namely, the connecting rope is wound on the connecting groove 323, so that the traction rope 33 is connected with the rock core 32.
In the present embodiment, the hauling cable 33 is a hoisting steel cable, and is not limited to a steel cable, but may be a nylon cable, etc., and only the core 32 can be made to enter the test hole 21.
The following describes the assembly process of the burying device 3 for a deep rock soil water potential sensor provided in this embodiment:
extending the soil water potential sensor 31 into the mounting hole 321 for interference fit, and extending the cable 311 from the connecting hole 322; the traction rope 33 is wound in the coupling groove 323.
The following describes the working principle of the test system 1 for a deep rock soil water potential sensor provided in this embodiment:
through taking out the rock core 32 from the rock body 2, set up the mounting hole 321 in order to install soil water potential sensor 31 in the rock core 32 again, put back the rock core 32 of installing soil water potential sensor 31 into the inside interference fit of the test hole 21 that the rock body 2 set up for soil water potential sensor 31 peripheral medium is unanimous with required test rock is in order to reach the medium balance completely, in order to carry out the normal position test.
In summary, according to the burying device 3 and the testing system for the deep rock soil water potential sensor provided by the invention, the soil water potential sensor 31 is installed on the rock core 32 obtained from the rock stratum to be tested, and the peripheral medium of the soil water potential sensor 31 is completely consistent with the rock to be tested through the installation hole 321 formed in the original rock core 32 so as to achieve medium balance, ensure the reliability of test data, play a role in protecting the soil water potential sensor 31, and achieve the purpose of effectively testing the matrix suction force of the deep rock.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The burying device for the deep rock soil water potential sensor is characterized by comprising a soil water potential sensor and a raw rock core, wherein a mounting hole is formed in one end of the raw rock core, the soil water potential sensor is arranged in the mounting hole, and the soil water potential sensor is in interference fit with the mounting hole;
the other end of the original rock core, which is far away from one end provided with the mounting hole, is provided with a connecting hole which is communicated with the mounting hole;
the aperture of the connecting hole is smaller than that of the mounting hole;
a cable is arranged on the soil water potential sensor, and one end of the cable extends out of the connecting hole;
the burying device for the deep rock soil water potential sensor further comprises a traction rope wound on the original rock core, and the traction rope can drive the original rock core to move.
2. The burying device for a deep rock soil water potential sensor according to claim 1, wherein a connecting groove is arranged on the outer wall of the original rock core, and the traction rope stretches into the connecting groove to drive the original rock core to move.
3. The embedment device for a deep rock and water potential sensor of claim 2, wherein the primary rock core has opposed first and second end faces, the connection slot extending through the first and second end faces.
4. The burying device for a deep rock soil water potential sensor as claimed in claim 2, wherein said plurality of connecting grooves are circumferentially opened on an outer wall of said core.
5. The burying device for a deep rock soil water potential sensor as claimed in claim 1, wherein said primary rock core is cylindrical.
6. A test system for a deep rock soil water potential sensor, comprising a rock body and a burying device for a deep rock soil water potential sensor according to any one of claims 1 to 5, wherein the rock body is provided with a test hole, and the raw rock core is located in the test hole and in interference fit with the test hole.
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| CN201811590237.4A CN109459559B (en) | 2018-12-25 | 2018-12-25 | Buried device for deep rock soil water potential sensor and test system |
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| CN201811590237.4A CN109459559B (en) | 2018-12-25 | 2018-12-25 | Buried device for deep rock soil water potential sensor and test system |
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| CN109459559B true CN109459559B (en) | 2024-03-29 |
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| CN111224516B (en) * | 2019-11-22 | 2024-09-24 | 苏州保邦电气有限公司 | Radial sensor mounting structure of magnetic suspension motor |
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