CN109580281A - Earth's surface original position ground shear test apparatus - Google Patents
Earth's surface original position ground shear test apparatus Download PDFInfo
- Publication number
- CN109580281A CN109580281A CN201910075714.1A CN201910075714A CN109580281A CN 109580281 A CN109580281 A CN 109580281A CN 201910075714 A CN201910075714 A CN 201910075714A CN 109580281 A CN109580281 A CN 109580281A
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- Prior art keywords
- inner tube
- outer tube
- earth
- vertical
- original position
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- 238000012360 testing method Methods 0.000 title claims abstract description 35
- 239000002689 soil Substances 0.000 claims abstract description 43
- 238000003825 pressing Methods 0.000 claims abstract description 19
- 238000002474 experimental method Methods 0.000 claims abstract description 11
- 230000000694 effects Effects 0.000 claims abstract description 8
- 230000005611 electricity Effects 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 238000005070 sampling Methods 0.000 abstract description 3
- 239000011435 rock Substances 0.000 description 36
- 238000011065 in-situ storage Methods 0.000 description 11
- 238000010008 shearing Methods 0.000 description 9
- 238000013461 design Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000006378 damage Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000005527 soil sampling Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/04—Devices for withdrawing samples in the solid state, e.g. by cutting
- G01N1/08—Devices for withdrawing samples in the solid state, e.g. by cutting involving an extracting tool, e.g. core bit
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0025—Shearing
Abstract
The present invention provides a kind of earth's surface original position ground shear test apparatus, including cylinder type hollow outer tube, one end of the outer tube is feeder ear and experiment control end, the other end is drill bit, the inner tube for taking soil is installed in the internal activity of the outer tube, the end that said inner tube is located at the drill bit is shoe structure and stretches out outside the outer tube, the control terminal is equipped with the vertical splenium for extending in said inner tube and applying pressure at right angle to the soil sample of acquisition, apply the cut part of cross shear to the soil sample of acquisition with the middle part that is mounted on said inner tube, the vertical splenium and the cut part are electric control gear.The present invention utilizes the sampling principle of dynamics of soil sampler, carries out micro-disturbance and takes soil, and using the vertical pressure of electric device progress and horizontal pressure, experimentation stability and precision can be improved.
Description
Technical field
The present invention relates to building field, in particular to a kind of dress that shearing test in situ can be realized to ground Rock And Soil
It sets.
Background technique
Rock mass structure unit is (weak structural face, hard by sillar (blocky, plate, complete or fragmentation), structural plane
Structural plane) and the composition such as charges, due to the inhomogeneities of development and the distribution of various structural planes, its deformation properties is made to compare rock
Stone deformation is much more complex, thus the deformation of rock mass cannot be stated by the deformation of rock, it is necessary to pass through rock mass deformation measuring
It deforms index.Rock mass deformation experiment is to measure rock mass deformation characteristic index under certain load effect or Unloading Effect
And the rock mass field experiment carried out.The deformation modulus, elasticity modulus and deformation coefficient isolith lapicide of rock mass is determined by experiment
Indispensable Mechanics Parameters of Rock Mass in journey.The deformation modulus and elasticity modulus of the available rock mass of the test.
The physical and mechanical parameter of rock mass is basic data, if cannot get exact value, is set to the intensity of any rock mass engineering project
Meter, deformation analysis, stability just accurately cannot be designed and be evaluated, so most of engineering discipline has safety coefficient
To increase safe guarantee.For colliery engineering, it is related to the design basis data of roadway support, clearly measures roadway surrounding rock
Mechanics parameter, to guarantee reasonability, economical cost and the duration of design of its support；Expansion rate, range and the extension of relaxation zone
Rule etc.；Country rock numerical simulation under unloading condition, the mechanics parameter that be also accurately obtained each layer rock mass of country rock can just be managed
The result thought.
Rock And Soil engineering investigation stage of the in-situ test work mainly before structure engineering design carries out, it is necessary to obtain
The physical and mechanical parameter for obtaining ground is supplied to design department as basic data, therefore, it is necessary to accomplish data accurately, reliably, surely
Fixed, the design structure of Cai Huishi design department is safe and reliable, and then ensures the safety of life and property.
Failure mode of the Rock And Soil under external load or Unloading Effect generally breaks bad and tension and destroys, wherein shearing
Destruction is in the great majority.Therefore, the essence of rock mass damage is exactly failure by shear and tension breakdown strength, the in-situ test of rock mass strength
Mainly measure the shearing and tensile strength of rock mass.It is currently used original position ground experiment, can measure rock mass angle of friction c and
Cohesive forceValue, c,Value is the important indicator of rock mass strength, it represents the performance that rock mass resists failure by shear.
Rock mass in-situ test is to prepare the effect of test specimen model engineering at the scene to apply external load to rock mass, and then seek rock mass
The test method of mechanics parameter is one of the important means of geotechnical engineering investigation.The great advantage of rock mass in-situ test is to rock
Body disturbance is small, maintains the natural structure and ambient condition of rock mass as much as possible, keeps the Mechanics Parameters of Rock Mass measured intuitive, quasi-
Really.
Currently, multiple independent equipment are usually used in the in-situ test of Rock And Soil carries out different experiments, then root respectively
Obtain dependence test according to the test data of distinct device as a result, which causes test process cumbersome tediously long, lack realization entirely from
The intelligent test device of dynamicization.
Summary of the invention
The object of the present invention is to provide carry out in-situ stress and shear strength survey to Rock And Soil in a kind of drilling of geotechnical engineering
The experimental provision in situ of examination.
Particularly, the present invention provides a kind of earth's surface original position ground shear test apparatus, including cylinder type hollow outer tube, described
One end of outer tube is feeder ear and experiment control end, and the other end is drill bit, is equipped with and is used in the internal activity of the outer tube
The inner tube of soil is taken, the end that said inner tube is located at the drill bit is shoe structure and stretches out outside the outer tube, the control terminal
It is equipped with and extends to apply the vertical splenium of pressure at right angle to the soil sample of acquisition in said inner tube, and be mounted in said inner tube
With the cut part to the soil sample of acquisition application cross shear, the vertical splenium and the cut part are electric control gear in portion.
In an embodiment of the invention, the channel of discharge liquid is provided between said inner tube and outer tube.
In an embodiment of the invention, the vertical splenium includes being stretched out by the control terminal and can be in said inner tube
The vertical pressing plate inside to axially move, the vertical pressing plate are automatically controlled movable plate, the shape and area and said inner tube of the vertical pressing plate
Radial cross-sectional shape it is identical with area, vertical pressure sensor is installed on one side what the vertical pressing plate was contacted with soil sample.
In an embodiment of the invention, the detection vertical pressing plate shift motion is installed on said inner tube inner wall
Touching switch, the control terminal is according to the trigger signal of the touching switch, it can be learnt that the current location of the vertical pressing plate.
In an embodiment of the invention, the cut part includes being movably arranged on the annular of said inner tube radially
Circle, and the electronic push plate of annular ring transverse shifting is pushed, and the shear sensors of the measurement electronic push plate pressure size, institute
Electronic push plate is stated to connect by the pipeline being arranged in said inner tube inner wall with the feeder ear and the control terminal.
In an embodiment of the invention, the multiple controls for starting corresponding test item are provided in the control terminal
Switch, and the display screen of display test result, the feeder ear are connect by cable with exterior power supply plant.
In an embodiment of the invention, control is installed far from one end of the drill bit in the outer tube and bores ground
When angle steering wheel.
The present invention utilizes the sampling principle of dynamics of soil sampler, using ground power unit, carries out micro-disturbance and takes soil；Using electricity
Dynamic device carries out vertical pressure and horizontal pressure, and experimentation stability and precision can be improved；Sensor pair is utilized using MEMS
Soil sample carries out data test.The present apparatus is tested in earth's surface or foundation pit, and ensures the experiment high-precision of original state Rock And Soil in situ
Test；During taking soil, using earth's surface and underground combined power, to ensure that the sufficient power of all kinds of soil bodys is sampled；It adopts
It is carried out applying pressure at right angle and shearing force with power circuit, it can be ensured that the stabilization of load guarantees to greatest extent and improve experiment number
According to precision.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the experimental provision in situ of one embodiment of the present invention.
Specific embodiment
As shown in Figure 1, one embodiment of the present invention discloses a kind of earth's surface original position ground shear test apparatus, generally comprise
Cylinder type hollow outer tube 10, and it is mounted on the inner tube 20 that soil sampling is used for inside outer tube 10.
One end of outer tube 10 is the feeder ear 11 for connecting external power, and control samples and the control terminal 12 of test process,
The other end of outer tube 10 be convenient for the drill bit 13 that pierces underground, inner tube 20 be located at the end of drill bit 13 for 21 structure of shoe and
It stretches out outside outer tube 10, is equipped in feeder ear 11 and extends in inner tube 10 the vertical splenium for applying pressure at right angle to the soil sample of acquisition
40, and the middle part of inner tube 10 is mounted on to apply the cut part 50 of cross shear to the soil sample of acquisition, hang down splenium 40 and shearing
Portion 50 is the electric control gear using electric power as power.Feeder ear 11 and control terminal 12 include driving hang down splenium 40 and cut part 50
Physical unit and computing unit.
At work, the drill bit 13 of outer tube 10 is directly connected on ground or foundation pit, using being driven by electricity drill bit
End 13 enters subsurface so that soil sample enters in inner tube 20, and shoe 21 can make drill bit 13 be easier to enter ground.Work as inner tube
When soil sample acquisition in 20 is full, controlling feeder ear 11 by control terminal 12 is that vertical splenium 40 is powered, and the splenium 40 that hangs down is driven to move axially
To apply pressure (stress) of hanging down to soil sample, to measure the adaptability to changes of soil sample.Then while keeping pressure at right angle to soil sample, control
End 12 controls feeder ear 11 again as the power supply of cut part 50, and cut part 50 is made to apply cross shear to the soil sample under current state,
After completing every experiment, control terminal 12 successively controls cut part 50 and 40 return of vertical splenium again.
Entire test process is controlled by control terminal 12, the connection control including feeder ear 11 and hang down pressure, shear history
Control and the calculating of result etc..Control terminal 12 in present embodiment uses MEMS (MEMS), because of function small in size
Can be complete, therefore on mountable experimental provision in situ, achieve the effect that real-time measurement and calculates in real time.
The present invention utilizes the sampling principle of dynamics of soil sampler, is used as power source using electric power, progress micro-disturbance takes soil, to taking
Soil sample out directly carries out vertically pressing and level presses, and obtains the stress and shearing force data of current soil sample, entirely tested
Mobile soil sample is not needed in journey, substantially increases the stability and precision of experimentation.
When the place shallow for some underground water is sampled, discharge liquid can be set between inner tube 20 and outer tube 10
Channel 14, the underground water into inner tube 20 can be expelled to outside inner tube 20 under the pressure of internal soil sample by channel 14.Here
Channel 14 can be to be arranged in inner tube 20 and be connected to the inside and outside channel of inner tube 20, be also possible to inner tube 20 and outer tube 10
Between gap.
Specific vertical splenium 40 is including an electric putter 43 connecting with control terminal 12 and is fixed on hanging down for 43 end of electric putter
Pressing plate 41,41 one of the electric putter and vertical pressing plate, using automatically controlled flexible, the shape of pressing plate 41 of hanging down and the radial direction of area and inner tube 20
Cross sectional shape is identical with area, is equipped with vertical pressure sensor 42 on one side what the pressing plate 41 that hangs down was contacted with soil sample.At work, it controls
End 12 controls the stroke of electric putter 43 by control power of motor.
Specific cut part 50 includes being movably arranged on the annular ring 52 of inner tube 20 radially, the internal diameter of annular ring 52 with it is interior
The internal diameter of pipe 20 is identical, but its wall thickness is less than the wall thickness of inner tube 20, thus opposite inner tube 20 can inner tube 20 radially
Move integrally a distance.It is provided in the side of annular ring 52 and laterally urges the mobile electronic push plate 51 of annular ring 52, simultaneously
Installation measures the shear sensors 53 of current shearing force size in electronic push plate 51, and electronic push plate 51 is by being arranged in inner tube 20
Pipeline in inner wall is connect with control terminal 12 and feeder ear 11.The thrust size of electronic push plate 51 and the size of power of motor have
It closes.
After energization, electronic push plate 51 pushes annular ring 52 mobile to the radial direction of soil sample, entangles position by annular ring 52
Soil sample i.e. under the action of cross force, relatively whole soil sample forms transverse shifting, ultimately forms section, reaches test shearing force
Result.
Specific electronic 51 shape of push plate can be the arcuate structure being bonded with 52 outer surface of annular ring.
In addition, working condition when to determine that vertical splenium 40 and cut part 50 press, it can be in inner tube 20 and electric putter 43
With corresponding touching switch is installed at the corresponding position of electric push plate 41 so that control terminal can understand electric push plate 41 and electronic immediately
The position of push plate.
The multiple control switches 121 for starting corresponding test item can be set in control terminal 12, such as hang down and compress switch, shear and open
It closes, while the display screen 122 of display vertical pressure and shearing test process data and result data is set, feeder ear 11 passes through cable
111 connect with exterior power supply plant.
It is possible to further the steering wheel 30 of the angle when outer tube 10 bores ground far from one end installation control of drill bit 13.
Steering wheel can be fixed on the end of control terminal, adjust the deviation angle of control terminal when taking soil to facilitate operation personnel.
So far, although those skilled in the art will appreciate that present invention has been shown and described in detail herein multiple shows
Example property embodiment still without departing from the spirit and scope of the present invention, still can according to the present disclosure directly
Determine or deduce out many other variations or modifications consistent with the principles of the invention.Therefore, the scope of the present invention is understood that and recognizes
It is set to and covers all such other variations or modifications.
Claims (7)
1. a kind of earth's surface original position ground shear test apparatus, including cylinder type hollow outer tube, which is characterized in that the one of the outer tube
End is feeder ear and experiment control end, and the other end is drill bit, is equipped in the internal activity of the outer tube for taking in soil
Pipe, the end that said inner tube is located at the drill bit are shoe structure and stretch out outside the outer tube that the control terminal, which is equipped with, prolongs
It extends to apply the vertical splenium of pressure at right angle to the soil sample of acquisition in said inner tube, and is mounted on the middle part of said inner tube with to adopting
The soil sample of collection applies the cut part of cross shear, and the vertical splenium and the cut part are electric control gear.
2. earth's surface original position ground shear test apparatus according to claim 1, which is characterized in that
The channel of discharge liquid is provided between said inner tube and outer tube.
3. earth's surface original position ground shear test apparatus according to claim 1, which is characterized in that
The vertical splenium includes the vertical pressing plate that is stretched out by the control terminal and can be axially moved in said inner tube, the vertical pressure
Plate is automatically controlled movable plate, and the shape and area of the vertical pressing plate are identical as the radial cross-sectional shape of said inner tube and area, in institute
That states that vertical pressing plate contacts with soil sample is equipped with vertical pressure sensor on one side.
4. earth's surface original position ground shear test apparatus according to claim 3, which is characterized in that
The touching switch for detecting the vertical pressing plate shift motion is installed on said inner tube inner wall, the control terminal is according to
The trigger signal of touching switch, it can be learnt that the current location of the vertical pressing plate.
5. earth's surface original position ground shear test apparatus according to claim 3, which is characterized in that
The cut part includes the electricity for being movably arranged on the annular ring of said inner tube radially, and pushing annular ring transverse shifting
Dynamic push plate, and the shear sensors of the measurement electronic push plate pressure size, the electronic push plate is by being arranged in said inner tube
Pipeline in inner wall is connect with the feeder ear and the control terminal.
6. earth's surface original position ground shear test apparatus according to claim 1, which is characterized in that
The multiple control switches for starting corresponding test item, and the display of display test result are provided in the control terminal
Screen, the feeder ear are connect by cable with exterior power supply plant.
7. earth's surface original position ground shear test apparatus according to claim 1, which is characterized in that
The steering wheel of angle when ground is bored in control is installed in the outer tube far from one end of the drill bit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910075714.1A CN109580281A (en) | 2019-01-25 | 2019-01-25 | Earth's surface original position ground shear test apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910075714.1A CN109580281A (en) | 2019-01-25 | 2019-01-25 | Earth's surface original position ground shear test apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109580281A true CN109580281A (en) | 2019-04-05 |
Family
ID=65917770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910075714.1A Pending CN109580281A (en) | 2019-01-25 | 2019-01-25 | Earth's surface original position ground shear test apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109580281A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111829899A (en) * | 2020-07-30 | 2020-10-27 | 河南城建学院 | Ground interlaminar shear motion detection device |
| CN113405985A (en) * | 2021-01-13 | 2021-09-17 | 绍兴文理学院 | Rock stratum surface adhesion force in-situ test equipment and method |
| CN113514347A (en) * | 2021-05-14 | 2021-10-19 | 长安大学 | In-hole in-situ shearing test device and test method |
-
2019
- 2019-01-25 CN CN201910075714.1A patent/CN109580281A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111829899A (en) * | 2020-07-30 | 2020-10-27 | 河南城建学院 | Ground interlaminar shear motion detection device |
| CN111829899B (en) * | 2020-07-30 | 2023-03-14 | 河南城建学院 | Ground interlaminar shear motion detection device |
| CN113405985A (en) * | 2021-01-13 | 2021-09-17 | 绍兴文理学院 | Rock stratum surface adhesion force in-situ test equipment and method |
| CN113514347A (en) * | 2021-05-14 | 2021-10-19 | 长安大学 | In-hole in-situ shearing test device and test method |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20210907 Address after: Room 303, unit 4, floor 4, meiheyuan East District, Haidian District, Beijing 100089 Applicant after: Meng Da Address before: 100124 room 1701-1703, No. 37, nanmofang Road, Chaoyang District, Beijing Applicant before: BEIJING LEIYUDA TECHNOLOGY Co.,Ltd. |
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| TA01 | Transfer of patent application right | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190405 |
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| WD01 | Invention patent application deemed withdrawn after publication |