CN109596258A - A kind of reversible formula earth pressure gauge - Google Patents
A kind of reversible formula earth pressure gauge Download PDFInfo
- Publication number
- CN109596258A CN109596258A CN201811390275.5A CN201811390275A CN109596258A CN 109596258 A CN109596258 A CN 109596258A CN 201811390275 A CN201811390275 A CN 201811390275A CN 109596258 A CN109596258 A CN 109596258A
- Authority
- CN
- China
- Prior art keywords
- pressure
- soil
- fluid reservoir
- distance rod
- hydraulic tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/16—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes for measuring several components of force
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a kind of reversible formula earth pressure gauges.Fluid pressure is converted by soil pressure by certain frame mode, converts the micro-strain of the soil body to the significant deformation of liquid, thus the sensitivity of adherence pressure sensor, and it is suitable for different soil structures；Outer protection shell is connected with hydraulic tube by connecting rubber simultaneously; instrument is freely rotated under the premise of guaranteeing hydraulic tube straight up; the soil pressure being convenient for measuring in all directions improves the accuracy of pressure data to realize the highly sensitive three-dimensional space pressure measurement to measuring point.
Description
Technical field
The present invention relates to a kind of reversible formula earth pressure gauges for measuring soil pressure value.
Background technique
In construction early period and the operational management in later period of all kinds of infrastructure projects, soil pressure is paid close attention to always.
The size of soil pressure force value and the safety of variable condition and engineering are closely bound up.Foundation pit is deeper and deeper in new construction now, accordingly
Security risk present in ground work progress is also more and more.It, can using corresponding monitoring technology in building foundation pit construction
Displacement, sedimentation and the inside soil body pressure change of the Engineering Zone soil body are reconnoitred well, and then before ensuring construction quality
It puts, improves the safety coefficient of engineering construction.
Conventional earth pressure gauge is made of backboard, tablet, signal-transmitting cable, vibratory string and exciting electromagnetic coil etc..Work as quilt
When soil stress changes in geodesic structure object, earth pressure gauge tablet synchronizes the variation for experiencing stress, and tablet will generate change
Shape, displacement transfer are transformed into the variation of vibratory string stress to vibratory string, to change the vibration frequency of vibratory string.Electromagnetic coil exciting vibratory string
And its vibration frequency is measured, frequency signal can measure the value of compressive stress of measured structure object through cable transmission to reading plotter.Together
When can synchronize the temperature value for measuring embedded point.
But because soil deformation magnitude is small, there is the soil body to the variation of the soil body and insensitive in this way in tablet
Pressure change, and tablet fails to corresponding deformation, only the registration of earth pressure gauge can not in real time with the practical pressure of measurement point
Power matches, thus sensibility is insufficient, and traditional earth pressure gauge is only used for measuring unidirectional soil pressure, such as vertical earth pressure
Or horizontal earth pressure, three-dimensional stress constraint then is synthesized by stress, for judging principal direction of stress.But virtual condition
In, instrument position is not substantially uniformity, can not represent soil in-situ by horizontal and vertical direction pressure composite value
Stress state.Therefore in terms of this for, traditional instrument is problematic in terms of measurement.
Summary of the invention
The purpose of the present invention is overcoming deficiency in the prior art, provides a kind of state change by soil pressure force value and pass through
The instrument is converted, and keeps the performance of its pressure more obvious, to achieve the purpose that improve measurement soil pressure precision, additionally
It can have the function that measure all directions soil pressure by adjusting instrument angle.
In order to solve the above-mentioned technical problem, the present invention is achieved through the following technical solutions:
A kind of reversible formula earth pressure gauge, including soil pressure probe, metal ball, distance rod, outer protection shell, pressure amplifier,
Hydrostatic sensor, fluid reservoir, hydraulic tube and pressure value transmission terminal；
Distance rod and pressure amplifier are integrated connection structure, are set in outer protection shell, and the front end of distance rod connects soil pressure
Power probe, pressure amplifier protrude into fluid reservoir, and hydraulic tube is connected at the top of fluid reservoir；By soil pressure probe, distance rod and pressure
The load transfer device that power amplifier is constituted is translatable in fluid reservoir under the action of radial soil pressure, to squeeze fluid reservoir
Interior liquid；
The metal ball is evenly distributed in around distance rod, to guarantee that distance rod can strictly prolong its axial movement；
The hydrostatic sensor is located at the bottom position of fluid reservoir, is connected by cable with pressure value transmission terminal.
The soil pressure probe is contacted with the soil body, receives the pressure of the soil body, the Vector modulation through exertin makes soil pressure pop one's head in
Promoted distance rod that pressure amplifier is pushed to be translatable in fluid reservoir.
Hydraulic tube is connect by connecting rubber with outer protection shell phase, and hydraulic tube is connected with fluid reservoir, is made because by crowded
The liquid of pressure effect can be entered in hydraulic tube by communicating position.
Change level of the liquid in the tube, compressed air volume changes liquid level pressure, so that liquid storage intraventricular pressure is reached stable by force, together
When load transfer device stress balance, convert in hydraulic tube significant liquid deformation for the micro-strain of the soil body, improve pressure sensing
The sensitivity of device.The reading of the hydrostatic sensor of fluid reservoir bottom passes through the soil body pressure that can be calculated instrument present position at this time
It is powerful small.
Preferably, the radial section of the soil pressure probe is long-pending adjustable with the radial section product ratio of pressure amplifier, expands
The applicable soil type of reversible formula earth pressure gauge described in exhibition and the depth of burying.
It is further preferred that different types of liquid can be stored in the fluid reservoir, it is close by the difference of different liquids
Degree changes the use scope of pressure gauge.
Compared with prior art, the beneficial effects of the present invention are:
It is fluid pressure that small soil deformation, which is passed through thaumatropy novel herein, converts liquid for the small deformation of the soil body
Large deformation, thus improve measurement pressure susceptibility, so that instrument is accurately captured the situation of change of soil pressure.It is external
Protective shell is connected to hydraulic tube using connection rubber, freely instrument can be made to change measurement direction within the scope of certain angle, dashed forward
It has broken conventional earth pressure gauge and has been only used for horizontal and vertical direction pressure measurement limitation.
Detailed description of the invention
Fig. 1 is reversible formula earth pressure gauge overall structure figure；
Fig. 2 is reversible formula earth pressure gauge front end force diagram；
Fig. 3 is reversible formula earth pressure gauge pressure transforming principle figure.
Specific embodiment
As shown in Figure 1, a kind of with the adjustable highly sensitive earth pressure gauge for surveying pressure direction, including soil pressure probe 1, gold
Belong to ball 2, distance rod 3, outer protection shell 4, pressure amplifier 5, hydrostatic sensor 6, fluid reservoir 7, hydraulic tube 8, pressure value transmission
Terminal 9 and connection rubber 10 form.Soil pressure probe 1, distance rod 3 and pressure amplifier 5 structure as a whole, Duo Gejin
Belong to ball 2 to be symmetrically and evenly distributed in around distance rod 3, distance rod 3 is connected with pressure amplifier 5, and storage is full of certain in night room 7
Density fluid, and be connected with hydraulic tube 8, managing interior lower part is the liquid in fluid reservoir 7, and top is full of helium.Outer protection shell 4
It is connected to 8 junction of hydraulic tube using connection rubber 10.Hydrostatic sensor 6 is secured on fluid reservoir bottom, by cable with
Pressure value transmission terminal 9 is connected.
I.e. soil pressure acts on soil pressure probe 1, and metal ball 2 keeps the level of distance rod 3.So that soil pressure probe 1
The pressure of receiving can be medium with distance rod 3, and radial effect moves its front and back in fluid reservoir 7 on pressure amplifier 5
It is dynamic, it oppresses liquid in case and enters hydraulic tube 8, change liquid in pipe height, to act on 7 bottom position of hydraulic fluid tank hydraulic to change
Pressure value on sensor 8, then pressure value signal is passed to pressure value transmission terminal 9, completes the accurate survey of pressure data
Amount and collection.
The present invention converts the hydraulic form of expression for soil pressure by the way that liquid is added, and improves instrumental sensitivity to reach
Purpose.
Soil pressure probe 1 is taken the pressure at central axes to be by uniform outer confining pressure as shown in Figure 2If probe is hanging down
Histogram is to projected area, the soil body active force that is subject to of soil pressure probe is, meet relationship:
(1)
Pressure amplifier 5 is taken the pressure at central axes to be by external confining pressure as shown in Figure 2If pressure amplifier 5 is hanging down
Histogram is to projected area, then its hydraulic action being subject to be, meet relationship:
(2)
Guarantee that distance rod 3 is translatable in axial lower resistance by metal ball 2, frictional force is ignored.Then have:
(3)
(1) and (2), which is brought into (3), to be obtained:
(4)
In Fig. 3, if certain fluid density in dynamic fluid reservoir 7 is ρ, hydraulic tube 8 arrives the central axes vertical range of pressure amplifier 5
For, acceleration of gravity is, the pressure at liquid level in hydraulic tube 8 is, then have:
(5)
In Fig. 3, setting 8 inner section of hydraulic tube product, the vertical range of liquid level to tube top is, that is, manage interior gas volume V(gas
Body is helium) are as follows:
(6)
It is obtained by Clapyron Equation:
(7)
In formula: n is the amount of helium substance, and in instrument to being periodically constant, R is constant 8.31441J/ (molK), and T is instrument
The temperature of present position, temperature change is smaller under normal conditions for earth pressure gauge operating position.
The vertical range that 5 axis of pressure amplifier is arrived at the top of hydraulic tube 8 is H, so:
(8)
It can to sum up obtain:
(9)
After Instrument Design finishes, parameter、、、It is constant.Therefore can pass through
Formula (9) buildingWithFunctional relation, pass throughIt can releaseNumerical value, i.e., external soil pressure.
Set the received pressure of 7 bottom hydraulic ga(u)ge of fluid reservoir 8 as, withRelationship are as follows:
(10)
For pressure amplifier 5 hydraulic centroidal axis to 7 inner wall bottom of fluid reservoir distance, give instrument whenFor constant.
(10) are substituted into (4), are eliminated:
(11)
By pressure transmission terminal can direct readout value, the soil pressure of instrument position can be obtained through (11)。
By formula (9) and (11) it is found thatOne timing, by adjustingWithProportionate relationship, instrument liquid is mobile, produces
Life is differentWith；WhenWhen generating smaller luffing, by certainWithRatio can make by formula (9) and (11)WithBiggish luffing is generated, and then is directly observedOr it is received by pressure transmission terminal 9Value can calculate,
Therefore the instrument is converted into hydraulic mode by soil pressure, and pressure change is changed into significantly by small, measurement accuracy is improved, has
Help the soil pressure variation for accurately acquiring monitoring point, helps engineering staff to grasp state of soil in real time, reach safe construction operation
Target.
In addition to changingWithRatio can also pass through the density of change liquidWith the volume inflated in hydraulic tube 8,
Change the constant in formula (9) and (11), so that the instrument be made to be suitable for the different soil body and depth.
Furthermore outer protection shell 4 is combined with 8 junction of hydraulic tube using connection rubber 10, is guaranteeing the two connection
Meanwhile instrument lower half portion being made to have the function of to turn to, it can guarantee in this way by artificially manually adjusting, make the instrument can be with
Soil pressure for different directions measures, and more accurately reacts the soil pressure spatial distribution of point position, breaches traditional soil
The limitation in manometry direction.
Undeclared part involved in invention is same as the prior art or is realized using the prior art.
Claims (5)
1. a kind of reversible formula earth pressure gauge, it is characterized in that: including soil pressure probe (1), metal ball (2), distance rod (3), outer
Portion's protective shell (4), pressure amplifier (5), hydrostatic sensor (6), fluid reservoir (7), hydraulic tube (8) and pressure value transmission terminal
(9)；
Distance rod (3) and pressure amplifier (5) are integrated connection structure, are set in outer protection shell (4), distance rod (3)
Front end connects soil pressure probe (1), and pressure amplifier (5) protrudes into fluid reservoir (7), and hydraulic tube (8) is connected to fluid reservoir (7) top
Portion；Effect of the load transfer device being made of soil pressure probe (1), distance rod (3) and pressure amplifier (5) in radial soil pressure
Under be translatable in the fluid reservoir (7), to squeeze fluid reservoir (7) interior liquid；
The metal ball (2) is evenly distributed in around distance rod (3), is axially moved with guaranteeing that distance rod (2) can strictly prolong it
It is dynamic；
The hydrostatic sensor (6) is located at the bottom position of fluid reservoir (7), is connected by cable with pressure value transmission terminal (9)
It connects.
2. a kind of reversible formula earth pressure gauge according to claim 1, it is characterized in that: soil pressure probe (1) is the same as soil
Body contact, receives the pressure of the soil body, and the Vector modulation through exertin makes soil pressure probe (1) that distance rod (3) be promoted to push pressure
Power amplifier (5) is translatable in fluid reservoir (7).
3. a kind of reversible formula earth pressure gauge according to claim 1, it is characterized in that: the hydraulic tube (8) passes through connection
Rubber (10) is connected with outer protection shell (4), and hydraulic tube (8) is connected with fluid reservoir (7), makes the liquid because being squeezed effect
Body can be entered by communicating position in hydraulic tube (8).
4. a kind of reversible formula earth pressure gauge according to claim 1, it is characterized in that: the diameter of soil pressure probe (1)
Radial section product ratio to sectional area and pressure amplifier (5) is adjustable, extends the applicable soil of the reversible formula earth pressure gauge
Earth type and the depth of burying.
5. a kind of reversible formula earth pressure gauge according to claim 1, it is characterized in that: can be stored up in the fluid reservoir (7)
Different types of liquid is deposited, changes the use scope of pressure gauge by the different densities of different liquids.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811390275.5A CN109596258A (en) | 2018-11-21 | 2018-11-21 | A kind of reversible formula earth pressure gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811390275.5A CN109596258A (en) | 2018-11-21 | 2018-11-21 | A kind of reversible formula earth pressure gauge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109596258A true CN109596258A (en) | 2019-04-09 |
Family
ID=65960224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811390275.5A Pending CN109596258A (en) | 2018-11-21 | 2018-11-21 | A kind of reversible formula earth pressure gauge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109596258A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110485395A (en) * | 2019-07-26 | 2019-11-22 | 浙江工业大学 | A kind of measurement Eccentric Load acts on the experimental rig and its test method of lower vertical earth pressure distribution |
| CN115096487A (en) * | 2022-06-17 | 2022-09-23 | 青岛理工大学 | Pressure measuring device and method for soil |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4662213A (en) * | 1986-02-03 | 1987-05-05 | Iowa State University Research Foundation, Inc. | Back pressured pneumatic pressure cell |
| CN201600206U (en) * | 2009-12-14 | 2010-10-06 | 中铁第一勘察设计院集团有限公司 | Flexible film hydraulic earth pressure gauge |
| CN205209663U (en) * | 2015-11-20 | 2016-05-04 | 深圳大学 | Zero strain soil pressure sensor |
| CN106768499A (en) * | 2016-11-16 | 2017-05-31 | 中北大学 | Fluid pressure type soil pressure sensor |
| CN206208420U (en) * | 2016-11-16 | 2017-05-31 | 中北大学 | A kind of fluid pressure type soil pressure sensor |
| CN108120645A (en) * | 2017-12-22 | 2018-06-05 | 上海岩土工程勘察设计研究院有限公司 | A kind of soil pressure in-situ testing device and its test method |
| CN207675554U (en) * | 2017-12-22 | 2018-07-31 | 上海勘察设计研究院(集团)有限公司 | A kind of soil pressure in-situ testing device |
-
2018
- 2018-11-21 CN CN201811390275.5A patent/CN109596258A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4662213A (en) * | 1986-02-03 | 1987-05-05 | Iowa State University Research Foundation, Inc. | Back pressured pneumatic pressure cell |
| CN201600206U (en) * | 2009-12-14 | 2010-10-06 | 中铁第一勘察设计院集团有限公司 | Flexible film hydraulic earth pressure gauge |
| CN205209663U (en) * | 2015-11-20 | 2016-05-04 | 深圳大学 | Zero strain soil pressure sensor |
| CN106768499A (en) * | 2016-11-16 | 2017-05-31 | 中北大学 | Fluid pressure type soil pressure sensor |
| CN206208420U (en) * | 2016-11-16 | 2017-05-31 | 中北大学 | A kind of fluid pressure type soil pressure sensor |
| CN108120645A (en) * | 2017-12-22 | 2018-06-05 | 上海岩土工程勘察设计研究院有限公司 | A kind of soil pressure in-situ testing device and its test method |
| CN207675554U (en) * | 2017-12-22 | 2018-07-31 | 上海勘察设计研究院(集团)有限公司 | A kind of soil pressure in-situ testing device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110485395A (en) * | 2019-07-26 | 2019-11-22 | 浙江工业大学 | A kind of measurement Eccentric Load acts on the experimental rig and its test method of lower vertical earth pressure distribution |
| CN110485395B (en) * | 2019-07-26 | 2024-03-26 | 浙江工业大学 | Test device and test method for measuring vertical soil pressure distribution under action of bias load |
| CN115096487A (en) * | 2022-06-17 | 2022-09-23 | 青岛理工大学 | Pressure measuring device and method for soil |
| CN115096487B (en) * | 2022-06-17 | 2024-02-20 | 青岛理工大学 | Pressure measuring device and method for soil |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101502423B1 (en) | Apparatus for measuring suction stress of unsaturated soil | |
| CN106225682B (en) | Measuring device and method for the vertical displacement of large structure ontology and ground settlement | |
| CN106197288B (en) | Self-calibration measuring device and method for large structure vertical displacement or deformation | |
| CN105676308B (en) | A kind of underground water in single well seepage velocity flow directional detection method and measuring instrument | |
| CN206223097U (en) | For the vertical displacement of large structure body and the measurement apparatus of ground settlement | |
| CN108152170B (en) | Free falling type spherical penetrometer with propeller | |
| CN109596258A (en) | A kind of reversible formula earth pressure gauge | |
| CN105509628B (en) | A kind of magnetic survey positioner and the method that landslide depth displacement monitoring is carried out using the device | |
| CN107675734B (en) | A kind of underwater directional vehicle construction dynamic monitoring method | |
| CN106290968A (en) | A kind of large space pulsatile flow field three-dimension measuring system and measuring method | |
| CN110516862A (en) | A kind of soil based on same-pore measurement, rock stratum hidden danger information evaluation method and system | |
| CN109537650A (en) | A kind of side slope wide range rangefinder and slope deforming method of real-time | |
| CN109141271A (en) | Multi-point type optical fiber grating bottom hole strain gauge | |
| CN109946008A (en) | A kind of very three-dimensional stress of primary rock overcoring method measuring device and measuring method of spherical shape backpack body | |
| WO2019127110A1 (en) | Free falling type ball-shaped penetrometer with propeller | |
| CN104964895A (en) | Method and apparatus for determining apparent density of pervasive solid substance | |
| CN106248038B (en) | The method that landslide surface inclination angle is converted into displacement | |
| CN106595813B (en) | Oil-water interface detector for salt cavern gas storage cavity making and oil-water interface detection method | |
| CN109870733B (en) | Land exploration data measuring device and exploration data processing method | |
| JPWO2020235324A1 (en) | Height difference measuring device and height difference measuring method | |
| CN206223095U (en) | For large structure vertical displacement or the self-calibration measurement apparatus of deformation | |
| CN205861021U (en) | Broken-line type single shaft inclination angle location deep displacement monitor | |
| CN109163700A (en) | Walking hydrostatic level and leveling measuring method | |
| CN205607381U (en) | Network inclinometry system based on sensor cluster | |
| CN209085551U (en) | Multi-point type optical fiber grating bottom hole strain gauge |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190409 |