CN105424273A - Novel indoor earth pressure cell calibration tank - Google Patents
Novel indoor earth pressure cell calibration tank Download PDFInfo
- Publication number
- CN105424273A CN105424273A CN201510932571.3A CN201510932571A CN105424273A CN 105424273 A CN105424273 A CN 105424273A CN 201510932571 A CN201510932571 A CN 201510932571A CN 105424273 A CN105424273 A CN 105424273A
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- Prior art keywords
- pressure cell
- sand
- soil pressure
- tank
- pressure
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- 239000004576 sand Substances 0.000 claims abstract description 39
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 6
- 239000010959 steel Substances 0.000 claims abstract description 6
- 238000011088 calibration curve Methods 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 239000002689 soil Substances 0.000 claims description 72
- 230000003993 interaction Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000012546 transfer Methods 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L25/00—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to a novel indoor earth pressure cell calibration tank. The novel indoor earth pressure cell calibration tank comprises a safety valve, a pressure gauge, an inlet valve, an exhaust valve, a line hole, a tank cover, a tank body, an earth pressure cell, a rubber airbag and sand. The rubber airbag plays a role in sealing and force transfer. The earth pressure cell is placed on steel plate sand and then slowly covered with sand to ensure that the sand has the same property as original earth, a lead is connected with an acquisition device via the line hole to plug the line hole and ensure air tightness, air pressure in the calibration tank is increased via an air compressor, the air pressure enables the rubber airbag to produce surface pressure on the sand, and then the air pressure acts on the earth pressure cell. The value of the pressure gauge is read, and the pressure on the sand is controlled by controlling the magnitude of the air pressure and transferred to the earth pressure cell. The voltage output by the earth pressure cell is acquired via the acquisition device, and a calibration curve of the earth pressure cell in the sand is obtained according to the value of the pressure gauge and the voltage output by the earth pressure cell.
Description
Technical field
The present invention relates to a kind of loading test device, particularly relate to a kind of indoor novel soil pressure cell tank prover, can be used for soil pressure cell in Geotechnical Engineering and demarcate.
Background technology
Along with economic development science and technology is progressive, heavy construction, structures, Very Large Bridge increasing, foundation requires increasingly stringent, and pile foundation significantly can increase the bearing capacity of ground, and form and the penetration process soil pressure of research stake are measured particularly important.Therefore, in Geotechnical Engineering, underground works, water conservancy and hydropower etc., the measurement of soil pressure shows very important one side.The measurement of soil pressure is an importance of soil mechanics theory and experimental study, is the important content of engineering survey.Soil pressure generally adopts soil pressure cell directly to measure.Due to the impact by various factors in working environment, often there is larger error with actual soil pressure force value in the data that soil pressure cell records, so soil pressure cell must be demarcated before the use, the running parameter of soil pressure cell when to obtain similar to actual working environment.
And the measurement great majority of traditional soil pressure cell adopt following several method:
air pressure is demarcated
hydraulic calibration
soil-structure interactions is demarcated
in-site modeling is demarcated.These methods above-mentioned all have respective limitation.The real curve deviation ratio of the curve that air pressure demarcation and hydraulic calibration draw and measurement is larger.In the middle of Practical Project and have to carry out the demarcation of soil pressure cell accurately, the demarcation of plant produced soil pressure cell out adopts hydraulic calibration or air pressure to demarcate usually, and the result of demarcation like this meets linear requirement.But the impact of various factors (particle size of sand, arching, stress are concentrated, load speed etc.) can be run at engineering-environment, therefore can produce and have very large deviation with original calibration coefficient.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides a kind of indoor novel soil pressure cell tank prover.Can be good at the mutual relationship of soil pressure and the confined pressure reflecting that soil pressure cell records.In order to realize above technical purpose, the present invention will take following technical scheme:
A kind of indoor novel soil pressure cell tank prover, is characterized in that: comprise superstructure and substructure.Its superstructure comprises cover, cover top is mounted with a tensimeter to be used for showing the atmospheric pressure value in current tank, when the atmospheric pressure value in tank exceedes the maximum pressure of allowing, substitute valve opens the safety ensureing tank prover automatically, air intake valve is used for controlling the inflow of gas, a drain tap is used for getting rid of gas in tank to be reduced energy consumption and makes the air pressure in tank and extraneous air pressure be consistent fast, and cover bottom margin is that a circle screw is used for and substructure connects into an entirety.Substructure comprises rubber pneumatic bag and plays the effect of sealing to transmit air pressure to the pressure of sand, and rubber pneumatic bag links together with cover, can body high-strength bolt, pad, ensures that in whole tank, impermeability is intact.Can body bottom is the concrete filled; increase the fastness of tank prover; concrete block build before in tank prover smearing release agent; repave plastic sheeting isolation concrete; guarantee that concrete can depart from tank prover; soil pressure cell is placed in steel plate sand, and wire is connected with harvester by circuit hole, and three tank legs are used for supporting whole tank prover.
Described indoor novel soil pressure cell tank prover device, is characterized in that: comprise safety valve, tensimeter, rubber pneumatic bag and sand and form the combining form that air pressure is demarcated and soil-structure interactions is demarcated.
Described indoor novel soil pressure cell tank prover device, is characterized in that described rubber pneumatic bag and Guan Gai, can body one are reinstated together with high strength exploitation, and rubber pneumatic bag (plays the effect of sealing and power transmission.Soil pressure cell is placed on fixation steel plate sand, then sand overburden soil pressure cell slowly, be embedded to certain thickness in sand, be connected with harvester by described circuit hole wire, seal circuit hole, air guide pipeline is connected with air compressor machine, for increasing the air pressure in tank, air pressure makes rubber pneumatic bag produce the pressure on surface to sand, thus acts on soil pressure cell.Read numerical value above tensimeter thus control the pressure on sand top by the size controlling air pressure and then pass to soil pressure cell.By harvester, soil pressure cell is reflected magnitude of voltage to collect, according to the voltage that pressure gauge reading and soil pressure cell export, obtain the calibration curve of soil pressure cell in sand.
The novel soil pressure cell tank prover in described indoor, is characterized in that: before described concreting in tank smearing release agent, repave plastic sheeting isolation concrete, guarantee that concrete departs from tank prover.
According to above technical scheme, known principle of work of the present invention is:
Soil pressure cell timing signal, soil pressure cell is placed in the sand of tank prover, air compressor machine increases the air pressure in tank prover by air guide pipeline, read numerical value above tensimeter thus make rubber pneumatic bag form a uniform plane effect on sand surface by the pressure that the size controlling air pressure controls sand top, the pressure uniform of generation acts on soil pressure cell.According to the voltage that pressure gauge reading and soil pressure cell export, obtain the calibration curve of soil pressure cell in sand.
Soil pressure cell demarcated by the novel soil pressure cell tank prover in indoor using the present invention to propose, ensure that soil pressure cell is vertically placed in sand, inclination can not be placed, sand will fully pave identical with undisturbed soil character, soil pressure cell cover sand soil thickness by different tests from Row sum-equal matrix, ensure the impermeability in tank, prevent the reflection affecting true pressure.
According to above technical scheme, known the present invention has following characteristics:
1, rubber pneumatic bag described in the present invention and safety air vavle is significant points of the present invention.Rubber pneumatic bag is as a kind of load transfer device, and what act on the pressure uniform that sand surface produces acts on soil pressure cell, is controlled the air pressure in tank by safety air vavle.Reach air pressure demarcation and the combination both soil-structure interactions demarcation.Rubber pneumatic bag can also ensure that superstructure is connected with substructure and fully avoid gas leak phenomenon to occur, and ensures the impermeability of tank prover.
2, this tank prover adopts soil-structure interactions to demarcate and combines both air pressure demarcation, overcomes the insecure shortcoming of traditional calibration result.By the air pressure of air compressor machine every 0.01Mpa or less, increase the air pressure in tank prover, sand is under pressure uniformly thus passes to soil pressure cell, soil pressure cell collects corresponding magnitude of voltage by wire harvester, calculate the relation of confined pressure power and voltage, obtain the calibration result of soil pressure cell in sand.
3, place concrete bottom tank prover, the strength and stability of whole device can be increased on the one hand, half rigid body of the soil body and the character of noncontinuity medium can be simulated on the other hand.Soil pressure cell for various ways is placed in this tank prover and can records out effective data.
Accompanying drawing explanation
Fig. 1 is; The sectional view of the A-A of indoor soil pressure cell tank prover
Fig. 2 is; The floor plan of indoor soil pressure cell tank prover
Fig. 3 is: the front elevation view of indoor soil pressure cell tank prover
Wherein: safety valve 1; Gas admittance valve 2; Tensimeter 3; Circuit hole 4; Vent valve 5; High-strength bolt hole 6; Hole for hoist 7; Cover 8; Can body 9; Tank leg 10; Rubber pneumatic bag 11; Soil pressure cell 12; Wire 13; Fixation steel plate 14; Concrete 15; Sand 16; Air guide pipeline 17.
Embodiment
Accompanying drawing indicates the structural representation of preferred embodiment involved in the present invention; Technical scheme of the present invention is explained below in conjunction with detail drawing.
As shown in the figure, the indoor soil pressure cell tank prover in present embodiment comprises cover 8, can body 9, tank leg 10, rubber pneumatic bag 11.I.e. superstructure and substructure, described cover 8 and can body 9 adopt high strength exploitation.
Tensimeter 3 is placed in the forefront of tank prover, facilitates staff's reading.Hole, by after wire 13, is blocked with air-locked material in circuit hole 5, ensures the impermeability in tank prover.Air compressor machine is connected with gas admittance valve 2 and will ensures to be connected closely, and the air pressure that air compressor machine produces flows in tank by gas admittance valve 2, and vent valve 5 will be in closed condition.Safety valve 1 can ensure automatically open when tank prover internal gas pressure exceedes setting value to get rid of excessive gas, reduces energy consumption.
First cover 8 is lifted by hole for hoist 7 with overhead crane when placing soil pressure cell 12, after being placed on home, soil pressure cell 12 to be placed on directly over fixation steel plate 14 on certain thickness sand 16, ensure that position does not vertically tilt, wire 13 is drawn by circuit hole 4, then sand is laid, to pave evenly during laying, identical with undisturbed soil character, when adjusting to suitable thickness, by good with high strength exploitation to cover 8, rubber pneumatic bag 11 and can body 9, can test after blocking circuit hole 4, guarantee impermeability.
Air compressor machine increases the air pressure in tank prover by air guide pipeline, and air pressure forces rubber pneumatic bag 11 pairs of sands 16 to produce the pressure on surface again, thus acts on above soil pressure cell 12.Read tensimeter 3 numerical value thus controlled the confined pressure power on sand 16 top by the size controlling air pressure above, pass to soil pressure cell 12.By harvester, soil pressure cell 12 is reflected magnitude of voltage to collect, according to the voltage that pressure gauge reading and soil pressure cell export, obtain the calibration curve of soil pressure cell in sand.
Claims (4)
1. the novel soil pressure cell tank prover in indoor, is characterized in that: comprise the caliberating device that superstructure, substructure and concrete (15) are formed.
2. the novel soil pressure cell tank prover in indoor according to claim 1 device, is characterized in that: comprise safety valve (1), tensimeter (3), rubber pneumatic bag (11) and sand (16) and form the combining form that air pressure is demarcated and soil-structure interactions is demarcated.
3. the novel soil pressure cell tank prover in indoor according to claim 2 device, it is characterized in that described rubber pneumatic bag (11) He Guangai (8), can body (9) one reinstates high strength exploitation together, rubber pneumatic bag (11) plays the effect of sealing and power transmission, soil pressure cell (12) is placed on fixation steel plate (14) sand (16), then sand (16) overburden soil pressure cell (12) slowly, be embedded to certain thickness in sand (16), be connected with harvester by described circuit hole (4) wire (13), seal circuit hole (4), air guide pipeline (17) is connected with air compressor machine, for increasing the air pressure in tank, air pressure makes rubber pneumatic bag produce the pressure on surface to sand (16), thus act on soil pressure cell (12), read numerical value above tensimeter (3) thus control the pressure on sand (16) top by the size controlling air pressure and then pass to soil pressure cell (12), by harvester, soil pressure cell (12) is reflected magnitude of voltage to collect, according to the voltage that pressure gauge reading and soil pressure cell export, obtain the calibration curve of soil pressure cell in sand.
4. the novel soil pressure cell tank prover in indoor according to claim 3, is characterized in that: described concrete (15) build before in tank smearing release agent, repave plastic sheeting isolation concrete, guarantee concrete (15) depart from tank prover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510932571.3A CN105424273A (en) | 2015-12-15 | 2015-12-15 | Novel indoor earth pressure cell calibration tank |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510932571.3A CN105424273A (en) | 2015-12-15 | 2015-12-15 | Novel indoor earth pressure cell calibration tank |
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| CN105424273A true CN105424273A (en) | 2016-03-23 |
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| CN201510932571.3A Pending CN105424273A (en) | 2015-12-15 | 2015-12-15 | Novel indoor earth pressure cell calibration tank |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784268A (en) * | 2016-04-18 | 2016-07-20 | 中国工程物理研究院总体工程研究所 | Multi-channel pressure sensor calibration device based on gas source load |
| CN106197780A (en) * | 2016-08-05 | 2016-12-07 | 浙江工业大学 | Novel resistor strain-type soil pressure cell sensor |
| CN106644255A (en) * | 2016-11-16 | 2017-05-10 | 河海大学 | Closed hydraulic type earth pressure cell calibration device and calibration method |
| CN108181039A (en) * | 2017-12-29 | 2018-06-19 | 泉州市大西洋电力科技有限公司 | Hydrostatic sensor |
| CN108955979A (en) * | 2018-07-09 | 2018-12-07 | 刘明亮 | Device, Monitoring on Earth Pressure system and method for soil pressure detection |
| CN110016904A (en) * | 2019-05-29 | 2019-07-16 | 成都理工大学 | A kind of fixed device of protection for Rock And Soil pressure test pressure cell |
| CN113820068A (en) * | 2021-09-14 | 2021-12-21 | 河南省计量科学研究院 | Dynamic calibration device of soil pressure gauge |
| CN114018473A (en) * | 2021-11-16 | 2022-02-08 | 中国人民解放军军事科学院国防工程研究院工程防护研究所 | Soil pressure sensor calibrating device |
| CN116296054A (en) * | 2022-12-08 | 2023-06-23 | 北京工业大学 | Soil pressure sensor's mark system based on soil medium |
| CN116296055A (en) * | 2022-12-08 | 2023-06-23 | 北京工业大学 | Calibration system capable of calibrating multiple soil pressure sensors simultaneously based on soil medium |
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2015
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105784268A (en) * | 2016-04-18 | 2016-07-20 | 中国工程物理研究院总体工程研究所 | Multi-channel pressure sensor calibration device based on gas source load |
| CN106197780A (en) * | 2016-08-05 | 2016-12-07 | 浙江工业大学 | Novel resistor strain-type soil pressure cell sensor |
| CN106644255A (en) * | 2016-11-16 | 2017-05-10 | 河海大学 | Closed hydraulic type earth pressure cell calibration device and calibration method |
| CN106644255B (en) * | 2016-11-16 | 2018-11-30 | 河海大学 | A kind of closing hydraulic type soil pressure cell caliberating device and scaling method |
| CN108181039A (en) * | 2017-12-29 | 2018-06-19 | 泉州市大西洋电力科技有限公司 | Hydrostatic sensor |
| CN108955979A (en) * | 2018-07-09 | 2018-12-07 | 刘明亮 | Device, Monitoring on Earth Pressure system and method for soil pressure detection |
| CN110016904A (en) * | 2019-05-29 | 2019-07-16 | 成都理工大学 | A kind of fixed device of protection for Rock And Soil pressure test pressure cell |
| CN110016904B (en) * | 2019-05-29 | 2023-11-28 | 成都理工大学 | Protection fixing device for rock-soil body pressure test pressure box |
| CN113820068A (en) * | 2021-09-14 | 2021-12-21 | 河南省计量科学研究院 | Dynamic calibration device of soil pressure gauge |
| CN114018473A (en) * | 2021-11-16 | 2022-02-08 | 中国人民解放军军事科学院国防工程研究院工程防护研究所 | Soil pressure sensor calibrating device |
| CN114018473B (en) * | 2021-11-16 | 2023-10-24 | 中国人民解放军军事科学院国防工程研究院工程防护研究所 | Soil pressure sensor calibrating device |
| CN116296054A (en) * | 2022-12-08 | 2023-06-23 | 北京工业大学 | Soil pressure sensor's mark system based on soil medium |
| CN116296055A (en) * | 2022-12-08 | 2023-06-23 | 北京工业大学 | Calibration system capable of calibrating multiple soil pressure sensors simultaneously based on soil medium |
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Application publication date: 20160323 |