CN107656035B - Permeation and humidity diffusion test device - Google Patents
Permeation and humidity diffusion test device Download PDFInfo
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- CN107656035B CN107656035B CN201711117204.3A CN201711117204A CN107656035B CN 107656035 B CN107656035 B CN 107656035B CN 201711117204 A CN201711117204 A CN 201711117204A CN 107656035 B CN107656035 B CN 107656035B
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- 238000012360 testing method Methods 0.000 title claims abstract description 107
- 238000009792 diffusion process Methods 0.000 title claims abstract description 57
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 129
- 239000011435 rock Substances 0.000 claims abstract description 56
- 238000007789 sealing Methods 0.000 claims abstract description 49
- 230000035699 permeability Effects 0.000 claims abstract description 25
- 239000011347 resin Substances 0.000 claims description 21
- 229920005989 resin Polymers 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 13
- 239000003292 glue Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 238000010276 construction Methods 0.000 description 5
- 230000001788 irregular Effects 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 230000035515 penetration Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 3
- 238000009412 basement excavation Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- 238000003466 welding 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
- G01N33/246—Earth materials for water content
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Abstract
The invention provides a permeability and humidity diffusion test device, and relates to the technical field of geotechnical engineering. The device comprises a sealing cylinder, a test box and a pressurizing assembly, wherein the sealing cylinder comprises a cylinder body and a cylinder cover which are detachably connected, and an outer pipe is arranged on the cylinder body in a protruding mode and used for being connected with a sample to be tested. The test box comprises a shell and a sleeve, wherein the shell is detachably connected with the cylinder body, the sleeve is used for fixedly connecting the outer extension pipe with a sample to be tested, and the outer extension pipe extends into the shell. The pressurizing assembly comprises a servo pump, a water pressure sensor and a humidity tester, wherein the servo pump is connected with the sealing cylinder through a water inlet pipeline, and the water pressure sensor is arranged on the pipeline and used for detecting water pressure. The humidity tester is arranged on the cylinder cover and communicated with the cylinder body for detecting humidity. The test device can accurately evaluate the physical and mechanical properties of unsaturated rock mass permeation and humidity diffusion under different water pressures, and has simple and reasonable structure and easy operation.
Description
Technical Field
The invention relates to the technical field of geotechnical engineering, in particular to a permeability and humidity diffusion test device.
Background
Before underground engineering is excavated, most of the rock is unsaturated, and the unsaturated rock can be permeated by construction water or other water sources in the process of excavation or after excavation, and long-term permeation can lead to mud formation and disintegration of the rock or reduction of physical and mechanical properties such as rock mass bearing capacity, deformation resistance and the like, so that the stability of surrounding rock is affected. Meanwhile, under the condition of no obvious permeation, the water content and the diffusion rate of the rock mass in the air environment with different humidity can also change, so that the physical and mechanical properties of the rock mass are reduced, and the stability of surrounding rock is influenced to a certain extent. Therefore, in order to ensure the reliability of the stability design of the surrounding rock of the underground engineering and the engineering construction quality, the change rule of the permeability and the water content of the unsaturated surrounding rock in the operation period or the construction process is accurately measured, and the method has important significance for evaluating the physical and mechanical properties of the surrounding rock.
Since the rock mass in underground engineering is mostly in an unsaturated state, the strength of the rock mass is also influenced by the water content, and the rock mass is very important for researching the water content. Although there are many methods and devices for measuring the permeability of saturated rock, the prior methods have insufficient measurement of the permeability and water content of unsaturated rock during construction or operation. Most are only tested for permeability alone or for humidity diffusion alone.
Therefore, the design and manufacture of the permeability and humidity diffusion test device is particularly important for not only performing permeability tests of unsaturated rock under different water pressures, but also performing humidity diffusion tests.
Disclosure of Invention
The invention aims to provide a permeability and humidity diffusion test device which can be used for conveniently measuring the permeability and the water content of unsaturated rock under different water pressures in an indoor test mode, and can be used for conveniently performing humidity diffusion tests and measuring the diffusion rate and the water content of rock under different humidity environments.
The invention also aims to provide another permeability and humidity diffusion test device which can simultaneously carry out water content measurement and humidity diffusion test, has simple structure, is easy to operate, is convenient to assemble and disassemble and can be repeatedly used.
The invention improves the technical problems by adopting the following technical proposal.
The invention provides a permeation and humidity diffusion test device which comprises a sealing cylinder, a test box and a pressurizing assembly, wherein the sealing cylinder comprises a cylinder body and a cylinder cover, the cylinder body is detachably connected with the cylinder cover, and an outer pipe is convexly arranged on the cylinder body and is used for being connected with a sample to be tested.
The test box comprises a shell and a sleeve, wherein the shell is detachably connected with the cylinder body, the sleeve is sleeved on the outer extending pipe, and the to-be-tested sample is fixedly connected with the outer extending pipe through the sleeve. The outer pipe extends into the shell.
The pressurizing assembly comprises a servo pump, a water pressure sensor and a humidity tester, wherein the servo pump is connected with the sealing cylinder through a water inlet pipeline, the water pressure sensor is arranged on the pipeline, and the humidity tester is arranged on the cylinder cover and is communicated with the cylinder body.
Further, at least two bosses are arranged on the outer side of the cylinder body, first threads are arranged on each boss, second threads which are matched with the first threads are arranged on the shell, and the bosses are connected with the shell through threads.
Further, the sleeve comprises a first shell and a second shell, the first shell is arranged on one side of the outer extending pipe, the second shell is arranged on the other side of the outer extending pipe, and the first shell and the second shell are enclosed and coated on the surface of the outer extending pipe; one end of the first shell is rotationally connected with one end of the second shell through a loose-leaf buckle, and the other end of the first shell is connected with the other end of the second shell through a bolt.
Further, the outer diameter of the to-be-measured sample is matched with the inner diameter of the outer extension pipe; and waterproof glue is coated on the outer surface of the to-be-tested sample to prevent water from seeping out of the to-be-tested sample.
Further, one end of the cylinder body, which is close to the cylinder cover, is provided with a plurality of first mounting holes, and the plurality of first mounting holes are uniformly distributed along the periphery of the cylinder body; the cylinder cover is provided with a plurality of second mounting holes, and the positions of the second mounting holes correspond to the positions of the first mounting holes.
Further, the cylinder body is close to be equipped with a plurality of first recesses on the surface of cylinder cap, the cylinder cap is close to one side of cylinder body is equipped with a plurality of second recesses, first recess with the second recess is used for placing the sealing washer, in order to improve the cylinder cap with the leakproofness between the cylinder body.
Further, a water inlet hole, a water outlet hole and a humidity testing hole are formed in the cylinder cover; one end of the water inlet pipeline is connected with the servo pump, the other end of the water inlet pipeline is connected with the water inlet hole, the water outlet hole is communicated with the water outlet pipeline, the humidity tester is communicated with the humidity testing hole through the testing pipeline, and the humidity tester is installed in the testing pipeline.
Further, a first control valve is arranged on the water inlet pipeline and used for controlling the water inflow of the sealing cylinder, and a second control valve is arranged on the water outlet pipeline and used for controlling the water drainage of the sealing cylinder.
Further, the cylinder is made of a resin material, and the housing is made of a resin material so as to facilitate observation of the test sample.
The invention provides a permeation and humidity diffusion test device which comprises a sealing cylinder, a test box and a pressurizing assembly, wherein the sealing cylinder comprises a cylinder body and a cylinder cover, the cylinder body is detachably connected with the cylinder cover, an outer extending pipe is arranged on the cylinder body in a protruding mode, the outer extending pipe extends into the test box and is used for being connected with a test sample, and waterproof glue is coated on the surface of the test sample.
The test box comprises a shell and a sleeve, an arc-shaped boss is arranged on the cylinder body, the shell is clamped with the boss, the sleeve is sleeved on the outer extending pipe, and the to-be-tested sample is fixedly connected with the outer extending pipe through the sleeve.
The pressurizing assembly comprises a servo pump, a water pressure sensor and a humidity tester, wherein the servo pump is connected with the sealing cylinder through a water inlet pipeline, the water pressure sensor is arranged on the pipeline, and the humidity tester is arranged on the cylinder cover and is communicated with the cylinder body.
The permeation and humidity diffusion test device provided by the invention has the following beneficial effects:
the invention provides a permeability and humidity diffusion test device which comprises a sealing cylinder, a test box and a pressurizing assembly, wherein the sealing cylinder comprises a cylinder body and a cylinder cover which are detachably connected, and the cylinder body is convexly provided with an outer extending pipe for being connected with a sample to be tested. The test box comprises a shell and a sleeve, wherein the shell is detachably connected with the cylinder body, the sleeve is used for fixedly connecting a sample to be tested with the outer extending pipe, and the outer extending pipe extends into the shell and is not influenced by external environmental factors. The pressurizing assembly comprises a servo pump, a water pressure sensor and a humidity tester, wherein the servo pump is connected with the sealing cylinder through a water inlet pipeline and used for applying pressure to the sealing cover, the water pressure sensor is arranged on the pipeline and used for detecting the pressure in the cylinder body, and the humidity tester is arranged on the cylinder cover and communicated with the cylinder body and used for detecting humidity. The permeability and humidity diffusion test device is simple and reasonable in structure, easy to operate, capable of simultaneously testing permeability and humidity diffusion, and high in popularization and application value.
The invention provides another penetration and humidity diffusion test device, a sealing cylinder comprises a cylinder body and a cylinder cover which are detachably connected, an outer pipe and an arc-shaped boss are convexly arranged on the cylinder body, the outer pipe is used for being connected with a sample to be tested, the boss is used for being connected with a shell of a test box, and the boss is connected with the shell in a clamping mode. The permeability and humidity diffusion test device has the advantages of simple and reasonable structure, convenient assembly and disassembly, reusability, long service life, easy operation and great popularization and application value.
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 view showing the overall structure of a permeation and humidity diffusion test apparatus according to an embodiment of the present invention;
FIG. 2 is an enlarged view of a portion of the portion I of FIG. 1;
FIG. 3 is a schematic view showing a connection structure of a sleeve of a permeation and humidity diffusion test apparatus according to an embodiment of the present invention;
FIG. 4 is a schematic diagram showing the experimental operation of the permeation and humidity diffusion test apparatus according to the embodiment of the present invention.
Icon: 100-permeation and humidity diffusion test device; 101-a sample to be tested; 102-waterproof glue; 110-cylinder; 111-an outer tube; 112-boss; 120-cylinder cover; 121-water inlet holes; 122-water outlet holes; 123-humidity test wells; 130-a housing; 131-a sleeve; 1311-a first housing; 1313-a second housing; 151-a servo pump; 152-a water inlet pipeline; 153-water pressure sensor; 154-a first control valve; 155-a water outlet pipeline; 156-a second control valve; 157-humidity tester.
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.
In the description of the present invention, it should be understood that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship conventionally put in use of the product of the present invention, or the azimuth or positional relationship conventionally understood by those skilled in the art, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present invention.
The terms "first", "second", and the like, are used merely for distinguishing the description and have no special meaning.
In the description of the present invention, it should also be noted that, unless explicitly stated and limited otherwise, the terms "disposed" and "mounted" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium. 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.
Fig. 1 is a schematic diagram of the overall structure of a permeation and humidity diffusion test apparatus 100 according to an embodiment of the present invention, please refer to fig. 1.
The invention provides a permeation and humidity diffusion test device 100, wherein the permeation and humidity diffusion test device 100 comprises a sealing cylinder, a test box and a pressurizing assembly. The sealed cylinder comprises a cylinder body 110 and a cylinder cover 120, the cylinder body 110 and the cylinder cover 120 are detachably connected, the cylinder body 110 is convexly provided with an outer extension tube 111 and a plurality of bosses 112, and the outer extension tube 111 is used for being connected with a sample 101 to be tested. The test box comprises a shell 130 and a sleeve 131, wherein the shell 130 is detachably connected with the cylinder 110, the sleeve 131 is sleeved on the outer extending pipe 111, and the to-be-tested sample 101 is fixedly connected with the outer extending pipe 111 through the sleeve 131. The extension tube 111 extends into the housing 130, and the boss 112 is detachably connected to the housing 130. The pressurizing assembly comprises a servo pump 151, a water pressure sensor 153 and a humidity tester 157, wherein the servo pump 151 is connected with the sealing cylinder through a water inlet pipeline 152, the water pressure sensor 153 is arranged on the pipeline, and the humidity tester 157 is arranged on the cylinder cover 120 and is communicated with the cylinder body 110. The water pressure is applied to the cylinder 110 through the servo pump 151, the water pressure sensor 153 detects the water pressure, the humidity tester 157 measures the humidity, the change condition of the sample 101 to be tested in the test box is observed, and relevant data are recorded, so that the measurement of the permeability and the water content of unsaturated rock under different water pressures and the measurement of the diffusion rate and the water content of rock under different humidity environments can be completed.
Fig. 2 is an enlarged view of a portion of the portion I in fig. 1, please refer to fig. 2.
Specifically, in the present embodiment, the extension pipe 111 is provided at the upper middle position of the side wall of the cylinder 110, the extension pipe 111 communicates with the cylinder 110, and the inner diameter of the extension pipe 111 is 8mm to 16mm, preferably 10mm. At least two bosses 112 are arranged on the outer side of the cylinder body 110, a first thread is arranged on each boss 112, a second thread which is matched with the first thread is arranged on the shell 130, and the bosses 112 are connected with the shell 130 through threads. Preferably, the number of the bosses 112 is two, one boss 112 is located above the outer tube 111, one boss 112 is located below the outer tube 111, and the distance between the two bosses 112 and the surface of the outer tube 111 is about 10mm, respectively, although two bosses 112 may be located on the left and right sides of the outer tube 111, respectively.
The housing 130 is cylindrical and is a hollow cylinder, one end of the housing 130 is sealed, and the other end is provided with internal threads, and the internal threads are matched with external threads arranged on the boss 112, so that the housing 130 is detachably connected with the cylinder 110. To better connect the housing 130 with the boss 112, the boss 112 is provided in an arc shape. The housing 130 is made of a transparent material, for example, a resin housing 130, so as to facilitate observation of the change condition of the sample 101 to be measured in the housing 130. Of course, the housing 130 may have other shapes, such as a prism, a cube, a pyramid, a truncated cone, etc., and is mainly used to isolate the sample 101 from the external environment.
Fig. 3 is a schematic diagram of a connection structure of a sleeve 131 of the permeation and humidity diffusion test apparatus 100 according to an embodiment of the present invention, and refer to fig. 3.
The sleeve 131 includes a first housing 1311 and a second housing 1313, the first housing 1311 is disposed on one side of the outer tube 111, and the second housing 1313 is disposed on the other side of the outer tube 111, i.e., the first housing 1311 and the second housing 1313 enclose and cover the surface of the outer tube 111. One end of the first housing 1311 is rotatably coupled to one end of the second housing 1313 by a hinge, and the other end of the first housing 1311 is coupled to the other end of the second housing 1313 by a bolt. In this embodiment, the sleeve 131 is an irregular cylinder, and is made of two hollow irregular semi-cylindrical steel materials, the back surfaces of the two hollow irregular semi-cylinders are connected by two loose-leaf fasteners, the front surfaces of the two hollow irregular semi-cylinders are respectively provided with two corresponding bolt holes, the two hollow irregular semi-cylindrical steel materials are connected by two fastening bolts, and a steel gasket is additionally arranged on the nut to enhance the fastening effect. Of course, a pivot connection or a clamping connection can be adopted.
The sleeve 131 is used for fixedly connecting the outer tube 111 and the sample 101 to be tested, one part of the sleeve 131 is sleeved on the outer tube 111, and the other part is sleeved on the sample 101 to be tested. Preferably, the sample 101 and the extension tube 111 are both cylindrical, and the outer diameter of the sample 101 is adapted to the inner diameter of the extension tube 111, and one end of the sample 101 extends into the extension tube 111. Except for the two end surfaces, the outer surface of the sample 101 to be measured is coated with waterproof glue 102, so that water is prevented from seeping out of the sample 101 to be measured.
The cylinder block 110 is made of a resin material, and is a hollow cube with an opening, one end of the cylinder block 110 close to the cylinder cover 120 is provided with a plurality of first mounting holes, and the plurality of first mounting holes are uniformly distributed along the periphery of the cylinder block 110. The cylinder cover 120 is a rectangular steel plate and is used for sealing the opening of the cylinder body 110, and a plurality of second mounting holes are formed in the cylinder cover 120 and correspond to the first mounting holes in position. Preferably, the first mounting hole and the second mounting hole are both circular bolt holes. Bolts are inserted into the corresponding first and second mounting holes, washers are added, and nuts are tightened, so that sealing installation of the cylinder block 110 and the cylinder head 120 is completed.
The cylinder body 110 is close to be equipped with a plurality of first recesses on the surface of cylinder cap 120, and one side that cylinder cap 120 is close to cylinder body 110 is equipped with a plurality of second recesses, and first recess and second recess are the arc recess, and the position corresponds each other for place rubber seal, in order to improve the leakproofness between cylinder cap 120 and the cylinder body 110.
The cylinder cover 120 is provided with a water inlet hole 121, a water outlet hole 122 and a humidity testing hole 123 which are communicated with the cylinder body 110. The water inlet hole 121 and the water outlet hole 122 are respectively positioned at two opposite sides of the cylinder cover 120, and the humidity testing hole 123 is positioned in the middle. One end of a water inlet pipeline 152 is connected with the servo pump 151, the other end of the water inlet pipeline 152 is connected with the water inlet hole 121, the water outlet hole 122 is communicated with the water outlet pipeline 155, the humidity tester 157 is communicated with the humidity testing hole 123 through a testing pipeline, and the humidity tester 157 is arranged on the testing pipeline. The water inlet pipeline 152 is provided with a first control valve 154 for controlling the water inflow of the sealing cylinder, and the water outlet pipeline 155 is provided with a second control valve 156 for controlling the water discharge of the sealing cylinder.
Specifically, the servo pump 151 includes a pump body, a pump piston, a servo control module, a servo motor, and the like. One end of the water pressure sensor 153 is connected with a servo control module, the servo control module is connected with a servo motor, the servo motor is connected with a pump piston, the pump piston is positioned in a pump body, the servo pump 151 is connected with a water inlet pipeline 152, and the other end of the water pressure sensor 153 is connected with a first control valve 154 through the water inlet pipeline 152.
The other penetration and humidity diffusion test device 100 provided in this embodiment, the penetration and humidity diffusion test device 100 includes a sealing cylinder, a test box and a pressurizing assembly, the sealing cylinder includes a cylinder 110 and a cylinder cover 120, the cylinder 110 and the cylinder cover 120 are detachably connected, the cylinder 110 is convexly provided with an outer extension tube 111, the outer extension tube 111 extends into the test box and is used for being connected with a test sample 101, and the surface of the test sample 101 is coated with waterproof glue 102. The test box comprises a shell 130 and a sleeve 131, wherein an arc-shaped boss 112 is arranged on the cylinder 110, the shell 130 is clamped with the boss 112, the sleeve 131 is sleeved on the outer extending pipe 111, and the test sample 101 to be tested is fixedly connected with the outer extending pipe 111 through the sleeve 131. The pressurizing assembly comprises a servo pump 151, a water pressure sensor 153 and a humidity tester 157, wherein the servo pump 151 is connected with the sealing cylinder through a water inlet pipeline 152, the water pressure sensor 153 is arranged on the pipeline, and the humidity tester 157 is arranged on the cylinder cover 120 and is communicated with the cylinder body 110. The cylinder 110, the housing 130, and the boss 112 are all made of a resin material so as to observe the test sample 101.
It should be noted that, instead of the above-mentioned fastening, threaded connection, etc., the boss 112 and the housing 130 may be fixedly connected to the cylinder 110 by means of bonding, welding, riveting, fastening, sleeving, etc., so as to isolate the sample 101 to be tested from the external environment.
The penetration and humidity diffusion test device 100 provided by the invention has the following installation process and working principle:
the installation process comprises the following steps: cylinder block 110 is sealingly connected to cylinder head 120. The rubber sealing ring is placed in a first groove on the upper surface of the cylinder body 110, a second mounting hole on the cylinder cover 120 is aligned with the first mounting hole of the cylinder body 110, the steel gasket is sleeved on the fastening nut, then the steel gasket penetrates through a round bolt hole where the cylinder body 110 and the cylinder cover 120 are overlapped, and the nut is screwed down, so that the sealing connection of the cylinder body 110 and the cylinder cover 120 is completed.
The sample 101 to be measured is connected to the extension tube 111. The surface of the sample 101 to be tested (except for the two end surfaces) is coated with waterproof glue 102, one end of the sample 101 to be tested is extended into the outer tube 111, the first housing 1311 and the second housing 1313 are folded and coated at the joint of the outer tube 111 and the sample 101 to be tested, namely, one part is sleeved on the outer surface of the outer tube 111, and the other part is sleeved on the outer surface of the sample 101 to be tested. One side of the first housing 1311 and the second housing 1313 is connected by a binder, and the other side is connected by bolt fastening.
And (3) connection of the pressurizing assembly. One end of the water inlet pipeline 152 is communicated with the servo pump 151, the other end of the water inlet pipeline 152 is communicated with the water inlet hole 121, a water pressure sensor 153 is arranged on the water inlet pipeline 152, and a first control valve 154 is arranged between the water pressure sensor 153 and the water inlet hole 121. The water outlet pipeline 155 is communicated with the water outlet hole 122, and a second control valve 156 is arranged on the water outlet pipeline 155. The wetness tester 157 is mounted at the wetness testing hole 123.
Fig. 4 is a schematic diagram illustrating a test operation of the permeation and humidity diffusion test apparatus 100 according to an embodiment of the present invention, and refer to fig. 4.
The test process comprises the following steps:
s1: the sample 101 to be measured is fixed. The unsaturated rock sample drilled on site is inserted into the outer tube 111 of the resin sealing cylinder, the rock sample and the outer tube 111 are fixed by fastening bolts on the sleeve 131, and the diameter of the rock sample is equal to the inner diameter of the outer tube 111 of the resin sealing cylinder.
S2: the boss 112 and the housing 130 are connected. The resin housing 130 is screwed with the resin boss 112.
S3: cylinder head 120 is coupled to cylinder block 110. The rubber sealing ring is placed in the first groove on the upper surface of the cylinder body 110, the round bolt hole on the cylinder cover 120 is aligned with the round bolt hole on the cylinder body 110, the steel gasket is sleeved on the bolt, the bolt penetrates through the round bolt hole overlapped with the cylinder body 110 and the cylinder cover 120, and the nut is screwed down, so that the sealing connection of the cylinder body 110 and the cylinder cover 120 is completed.
S4: and (3) connection of the pressurizing assembly.
And (3) installing a water inlet end: the water inlet line 152 is connected to the servo pump 151 and the water inlet hole 121, and a water pressure sensor 153 and a first control valve 154 are installed. And (3) water outlet end installation: the water outlet pipe 155 is connected to the water outlet 122, and a second control valve 156 is provided thereon. The wetness tester 157 is mounted at the wetness testing hole 123.
S5: permeation and moisture diffusion tests.
The first control valve 154 and the second control valve 156 are opened, water is injected into the resin sealing cylinder through the servo pump 151, and when the resin sealing cylinder is filled with water and the water outlet pipeline 155 has water outflow, the second control valve 156 is closed. Then, a predetermined water pressure is applied to the inside of the resin sealing cylinder by the servo pump 151, and a penetration test of the unsaturated rock mass sample is observed in real time.
When the humidity diffusion test is performed, the humidity is detected by the humidity tester 157 without pressurizing, and the humidity diffusion test of the unsaturated rock sample is observed in real time by fixing the outer tube 111 of the resin sealing cylinder with the rock sample through the sleeve 131 without pressurizing and only preparing solutions with different concentrations.
S6: and (5) analyzing and calculating.
And the physical and mechanical properties of the unsaturated rock mass sample and the humidity diffusion rock mass sample under different pressures are quantitatively calculated by adopting the existing method according to related specifications and formulas through real-time observation of the permeation and humidity diffusion test of the unsaturated rock mass sample. And (5) completing the measurement of the water content, permeability, humidity diffusion and the like of the rock mass sample.
In the unsaturated rock permeability test, a sufficient amount of water is injected into the resin sealing cylinder, the outer pipe 111 is immersed, and the permeability of the unsaturated rock mass under different water pressures is quantitatively evaluated by adopting the existing method according to the relevant specifications. When the humidity diffusion test is carried out, water is injected into the resin sealing cylinder, but the mouth of the outer pipe 111 cannot be immersed, after the water is diffused for a period of time, a plurality of sections of rock mass samples are continuously taken to measure the water content, and the diffusion rate is calculated according to the existing formula. In the test process, waterproof glue 102 is coated on the surface of the rock mass sample except for two end faces, so that water is prevented from flowing out from the periphery of the rock mass sample, the rock mass sample is isolated from the external environment by adopting the resin shell 130, and the influence of the external environment on the test result is avoided.
In summary, the permeation and humidity diffusion test device 100 provided by the present invention has the following advantages:
the permeability and humidity diffusion test device 100 provided by the invention can be used for not only performing unsaturated rock permeability tests under different water pressures, but also performing humidity diffusion tests. Secondly, the hydraulic servo pump 151 is adopted to apply different hydraulic pressures to the unsaturated rock sample and simulate the change process of the hydraulic pressure, so that the actual condition of the site is accurately reflected, and the requirements of engineering technicians on accurately knowing the physical and mechanical properties of the unsaturated rock mass of the underground engineering in the whole construction and operation process are met. Thirdly, by utilizing the transparency of the resin material and adopting the components such as the resin water-permeable sample box, the resin cylinder 110 and the like, the technical staff can be ensured to observe in real time in the permeation and humidity diffusion test of the unsaturated rock sample, and convenience is provided for accurately and intuitively researching the evolution rule of the unsaturated rock permeation under different pressures. Fourth, the seepage and humidity diffusion test device 100 solves the problem that the physical and mechanical properties of the unsaturated rock seepage and humidity diffusion under different water pressures cannot be accurately evaluated at present, and the seepage and humidity diffusion test device 100 is reasonable and simple in structure, easy to manufacture, simple to operate, low in test cost, reusable, high in practicability, capable of being widely used for seepage tests and humidity diffusion tests of the unsaturated rock under different water pressures in the rock mass engineering, and high in popularization and application value.
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, combinations and variations of the present invention will be apparent to 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 (7)
1. The device is characterized by comprising a sealing cylinder, a test box and a pressurizing assembly, wherein the sealing cylinder comprises a cylinder body and a cylinder cover, the cylinder body and the cylinder cover are detachably connected, and the cylinder body is convexly provided with an outer pipe for being connected with a sample to be tested;
the test box comprises a shell and a sleeve, the shell is detachably connected with the cylinder body, the sleeve is sleeved on the outer extending pipe, and the sample to be tested is fixedly connected with the outer extending pipe through the sleeve; the outer extending pipe extends into the shell;
the pressurizing assembly comprises a servo pump, a water pressure sensor and a humidity tester, the servo pump is connected with the sealing cylinder through a water inlet pipeline, the water pressure sensor is arranged on the pipeline, and the humidity tester is arranged on the cylinder cover and is communicated with the cylinder body;
at least two bosses are arranged on the outer side of the cylinder body, a first thread is arranged on each boss, a second thread which is matched with the first thread is arranged on the shell, and the bosses are connected with the shell through threads;
the sleeve comprises a first shell and a second shell, the first shell is arranged on one side of the outer extending pipe, the second shell is arranged on the other side of the outer extending pipe, and the first shell and the second shell are enclosed and coated on the surface of the outer extending pipe; one end of the first shell is rotationally connected with one end of the second shell through a loose-leaf buckle, and the other end of the first shell is connected with the other end of the second shell through a bolt;
the outer diameter of the to-be-measured sample is matched with the inner diameter of the outer extension pipe; the outer surface of the sample to be tested is coated with waterproof glue to prevent water from seeping out of the sample to be tested;
when the unsaturated rock permeability test is carried out, a servo pump is adopted to apply different water pressures to the unsaturated rock sample, and the change process of the water pressure is simulated, so that the permeability of the unsaturated rock mass under different water pressures is quantitatively evaluated; when the humidity diffusion test is carried out, pressurization is not needed, solutions with different concentrations are only needed to be configured, the humidity is detected through a humidity tester, the needed environment is obtained, the outer tube of the sealing cylinder is fixed with the rock mass sample through the sleeve, the moisture is diffused freely, and the humidity diffusion test of the unsaturated rock mass sample is observed in real time.
2. The permeation and humidity diffusion test device according to claim 1, wherein one end of the cylinder body, which is close to the cylinder cover, is provided with a plurality of first mounting holes, and the plurality of first mounting holes are uniformly distributed along the periphery of the cylinder body; the cylinder cover is provided with a plurality of second mounting holes, and the positions of the second mounting holes correspond to the positions of the first mounting holes.
3. The apparatus according to claim 1, wherein the cylinder body is provided with a plurality of first grooves on a surface thereof adjacent to the cylinder head, a plurality of second grooves are provided on a side thereof adjacent to the cylinder body, and the first grooves and the second grooves are used for placing sealing rings to improve sealability between the cylinder head and the cylinder body.
4. The device for testing the permeation and humidity diffusion according to claim 1, wherein the cylinder cover is provided with a water inlet hole, a water outlet hole and a humidity testing hole; one end of the water inlet pipeline is connected with the servo pump, the other end of the water inlet pipeline is connected with the water inlet hole, the water outlet hole is communicated with the water outlet pipeline, the humidity tester is communicated with the humidity testing hole through the testing pipeline, and the humidity tester is installed in the testing pipeline.
5. The apparatus according to claim 4, wherein the water inlet pipe is provided with a first control valve for controlling the water inflow of the sealing cylinder, and the water outlet pipe is provided with a second control valve for controlling the water discharge of the sealing cylinder.
6. The apparatus according to claim 1, wherein the cylinder is made of a resin material and the housing is made of a resin material so as to observe the test sample.
7. The device is characterized by comprising a sealing cylinder, a test box and a pressurizing assembly, wherein the sealing cylinder comprises a cylinder body and a cylinder cover, the cylinder body is detachably connected with the cylinder cover, an outer pipe is convexly arranged on the cylinder body, and extends into the test box and is used for being connected with a sample to be tested, and waterproof glue is coated on the surface of the sample to be tested;
the test box comprises a shell and a sleeve, an arc-shaped boss is arranged on the cylinder body, the shell is clamped with the boss, the sleeve is sleeved on the outer extending pipe, and the sample to be tested is fixedly connected with the outer extending pipe through the sleeve;
the pressurizing assembly comprises a servo pump, a water pressure sensor and a humidity tester, the servo pump is connected with the sealing cylinder through a water inlet pipeline, the water pressure sensor is arranged on the pipeline, and the humidity tester is arranged on the cylinder cover and is communicated with the cylinder body;
the sleeve comprises a first shell and a second shell, the first shell is arranged on one side of the outer extending pipe, the second shell is arranged on the other side of the outer extending pipe, and the first shell and the second shell are enclosed and coated on the surface of the outer extending pipe; one end of the first shell is rotationally connected with one end of the second shell through a loose-leaf buckle, and the other end of the first shell is connected with the other end of the second shell through a bolt;
when the unsaturated rock permeability test is carried out, a servo pump is adopted to apply different water pressures to the unsaturated rock sample, and the change process of the water pressure is simulated, so that the permeability of the unsaturated rock mass under different water pressures is quantitatively evaluated; when the humidity diffusion test is carried out, pressurization is not needed, solutions with different concentrations are only needed to be configured, the humidity is detected through a humidity tester, the needed environment is obtained, the outer tube of the sealing cylinder is fixed with the rock mass sample through the sleeve, the moisture is diffused freely, and the humidity diffusion test of the unsaturated rock mass sample is observed in real time.
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| CN201711117204.3A CN107656035B (en) | 2017-11-13 | 2017-11-13 | Permeation and humidity diffusion test device |
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| CN201711117204.3A CN107656035B (en) | 2017-11-13 | 2017-11-13 | Permeation and humidity diffusion test device |
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| CN107656035B true CN107656035B (en) | 2024-04-02 |
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| CN109596500B (en) * | 2019-01-21 | 2024-04-02 | 信阳师范学院 | Rock single-sided bearing water pressure seepage simulation test device and test method |
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