CN101561331A - Soil pressure tester with flexible testing surface - Google Patents
Soil pressure tester with flexible testing surface Download PDFInfo
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- CN101561331A CN101561331A CNA200910043418XA CN200910043418A CN101561331A CN 101561331 A CN101561331 A CN 101561331A CN A200910043418X A CNA200910043418X A CN A200910043418XA CN 200910043418 A CN200910043418 A CN 200910043418A CN 101561331 A CN101561331 A CN 101561331A
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- soil pressure
- testing surface
- shell
- flexibility test
- test surface
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Abstract
The invention discloses a soil pressure tester with a flexible testing surface. A compression surface of a shell is provided with an elastic testing surface, and the shell and the elastic testing surface are made into a sealing body; the shell is internally provided with a bracket (7) which is provided with a hole (8) and corresponding to the elastic testing surface, and a certain distance is kept between the bracket (7) and the elastic testing surface, so that the elastic testing surface is separated from the bracket (7) when being not stressed; the elastic testing surface is stuck with a metal contact (4) which transmits electrical signals outside the tester through a cable (3) by a lead; the shell is provided with a charging hole (5) and a high-accuracy gas pressure sensor (6). The soil pressure tester with the flexible testing surface is used for testing the soil pressure, and has the advantages of high accuracy, simple structure, convenient fabrication and reliable performance.
Description
Technical field
Patent of the present invention relates to a kind of proving installation that can place inside soil body accurately to measure soil pressure, refers in particular to adapt to the discrete material rigidity condition of testing automatically, prevents that the soil body arching from influencing the new device of test result.
Background technology
At present, for guaranteeing the safety of soil-baffling structure thing, the normal requirement measures the soil pressure that acts on the works, or when carrying out scientific research, requires accurately to measure the soil pressure state of inside soil body.Present stage, the assay method that extensively adopts was to be embedded in soil pressure cell on the works or in the soil body, to adopt readout instrument that the soil pressure data are read then.But because the soil pressure cell surface is generally made by the big material of rigidity such as stainless steel, when the soil body deformed, the soil pressure cell surface formed arching, has influenced the accuracy of measured soil pressure value greatly.If adopt flexible material to replace at soil pressure testing apparatus pressure surface, can improve the accuracy of soil pressure test, very favourable to the explanation of Engineering Control and scientific experimentation data, still there is not this type of device at present.
Summary of the invention
Technical matters to be solved by this invention provides a kind of high soil pressure tester with flexible testing surface of accuracy of soil pressure test.
In order to solve the problems of the technologies described above, soil pressure tester with flexible testing surface provided by the invention, the compression face of shell is provided with flexibility test surface and described shell and described flexibility test surface and makes seal, in described shell, be provided with a with holes support surperficial corresponding with described flexibility test, described support and described flexibility test surface keep certain distance, when described flexibility test surface is not stressed and described support keep disengaged position, metal clad contact on the described flexibility test surface, described hard contact is reached electric signal outside the tester through cable by lead; Described shell is equipped with inflation inlet and high precision atmospheric pressure sensor.
Described flexibility test surface is made by rubber membrane, and described shell is made by the macromolecular material annulus.
Adopt the soil pressure tester with flexible testing surface of technique scheme, implementation method is: insert a special rubber pneumatic bag at inside soil body, when the soil body externally produces inner soil pressure under the condition, can make rubber pneumatic bag take place to compress and be close on the internal stent, charge into pressurized air to rubber pneumatic bag this moment, when rubber pneumatic bag and internal stent disengaging, gaseous tension is outside soil pressure in the air bag.Abandon and adopt string wire frequency or strain ga(u)ge to measure the mode of soil pressure in the conventional soil pressure cell, use air pressure instead and measure realization, its surperficial rigidity is less, feeds pressure cell gas evenly distribution and pressure surface by regulating, thereby reaches the purpose of accurate measurement soil pressure.
In sum, the present invention is that the accuracy of a kind of soil pressure test is high and simple in structure, easily manufactured, the soil pressure tester with flexible testing surface of dependable performance.
Description of drawings
Fig. 1 is the soil pressure proving installation overall appearance synoptic diagram with flexible testing surface;
Fig. 2 is the soil pressure proving installation sectional view with flexible testing surface;
Fig. 3 is the supporting structure synoptic diagram.
Embodiment
With reference to figure 1, Fig. 2 and Fig. 3, shell is made seal by macromolecular material annulus 2, be provided with firm and have the rubber membrane 1 of favorable elasticity at the compression face of macromolecular material annulus 2, macromolecular material annulus 2 and rubber membrane 1 are made seal, rubber membrane 1 has one with holes 8 the support 7 by the stainless steel making in macromolecular material annulus 2, support 7 has conducting function, support 7 has small radian or keeps certain distance with rubber membrane 1, when rubber membrane 1 is not stressed and support 7 keep disengaged positions, metal clad contact 4 on the rubber membrane 1, hard contact 4 is reached electric signal outside the tester through cable 3 by lead; Inflation inlet 5 and high precision atmospheric pressure sensor 6 are housed in the macromolecular material annulus 2.
With reference to figure 1, Fig. 2 and Fig. 3, during use, the soil pressure tester that at first will have flexible surface places test position, when the soil pressure on acting on rubber membrane 1 becomes big, rubber membrane 1 can be close to support 7, at this moment the hard contact 4 on the rubber membrane 1 is in connected state by support 7, during connected state control external gas pump by inflation inlet 5 automatically to filling the compression air in the macromolecular material annulus 2, pressurized air acts on rubber membrane 1 by hole 8 and makes rubber membrane 1 outwards overcome soil pressure to eject, disconnect with support 7 once more up to hard contact 4 and to be connected, suffered soil pressure equates with the atmospheric pressure of the measurement of pressure cell internal accuracy baroceptor 6 on any time rubber membrane 1; When outside soil pressure reduces, by continuous measurement to high precision baroceptor 6, when the air pressure decrease surpasses certain numerical value, instrument will be automatically to the tester release, and by the switching effect between rubber membrane 1 and the support 7, automatically the pressure cell inner air pressure is adjusted to and measures soil pressure and equate, to reach the observation purpose.
Claims (2)
1, a kind of soil pressure tester with flexible testing surface, it is characterized in that: the compression face of shell is provided with flexibility test surface and described shell and described flexibility test surface and makes seal, in described shell, be provided with the support (7) of with holes (8) corresponding with described flexibility test surface, described support (7) keeps certain distance with described flexibility test surface, when described flexibility test surface is not stressed and described support (7) keep disengaged position, on the described flexibility test surface metal clad contact (4), described hard contact (4) is reached electric signal outside the tester through cable (3) by lead; Described shell is equipped with inflation inlet (5) and high precision atmospheric pressure sensor (6).
2, the soil pressure tester with flexible testing surface according to claim 1 is characterized in that: described flexibility test surface is made by rubber membrane (1), and described shell is made by macromolecular material annulus (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910043418XA CN101561331B (en) | 2009-05-15 | 2009-05-15 | Soil pressure tester with flexible testing surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910043418XA CN101561331B (en) | 2009-05-15 | 2009-05-15 | Soil pressure tester with flexible testing surface |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101561331A true CN101561331A (en) | 2009-10-21 |
| CN101561331B CN101561331B (en) | 2010-11-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910043418XA Expired - Fee Related CN101561331B (en) | 2009-05-15 | 2009-05-15 | Soil pressure tester with flexible testing surface |
Country Status (1)
| Country | Link |
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| CN (1) | CN101561331B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305677A (en) * | 2011-08-08 | 2012-01-04 | 中国地质大学（武汉） | Rock soil pressure measuring instrument and measuring method thereof |
| CN105650476A (en) * | 2016-04-01 | 2016-06-08 | 中国工程物理研究院总体工程研究所 | Gas source pressure control system of earth pressure sensor calibration apparatus and control method of gas source pressure control system |
| CN106197780A (en) * | 2016-08-05 | 2016-12-07 | 浙江工业大学 | Novel resistor strain-type soil pressure cell sensor |
| CN106768499A (en) * | 2016-11-16 | 2017-05-31 | 中北大学 | Fluid pressure type soil pressure sensor |
| CN112681179A (en) * | 2020-12-17 | 2021-04-20 | 东南大学 | Pavement structure stress detection and maintenance early warning method based on intelligent particle structure |
-
2009
- 2009-05-15 CN CN200910043418XA patent/CN101561331B/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305677A (en) * | 2011-08-08 | 2012-01-04 | 中国地质大学（武汉） | Rock soil pressure measuring instrument and measuring method thereof |
| CN102305677B (en) * | 2011-08-08 | 2012-11-28 | 中国地质大学（武汉） | Rock soil pressure measuring instrument and measuring method thereof |
| CN105650476A (en) * | 2016-04-01 | 2016-06-08 | 中国工程物理研究院总体工程研究所 | Gas source pressure control system of earth pressure sensor calibration apparatus and control method of gas source pressure control system |
| CN105650476B (en) * | 2016-04-01 | 2017-08-29 | 中国工程物理研究院总体工程研究所 | The bleed pressure control system and control method of soil pressure case calibrating installation |
| CN106197780A (en) * | 2016-08-05 | 2016-12-07 | 浙江工业大学 | Novel resistor strain-type soil pressure cell sensor |
| CN106768499A (en) * | 2016-11-16 | 2017-05-31 | 中北大学 | Fluid pressure type soil pressure sensor |
| CN106768499B (en) * | 2016-11-16 | 2023-08-08 | 中北大学 | Hydraulic soil pressure sensor |
| CN112681179A (en) * | 2020-12-17 | 2021-04-20 | 东南大学 | Pavement structure stress detection and maintenance early warning method based on intelligent particle structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101561331B (en) | 2010-11-10 |
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Owner name: CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY Free format text: FORMER OWNER: HE WEI Effective date: 20100625 |
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Free format text: CORRECT: ADDRESS; FROM: 410076 NO.703, BUILDING EAST 6, CHANGSHA SCIENCE AND TECHNOLOGY UNIVERSITY,NO.45, CHILING ROAD, CHANGSHA CITY, HUNAN PROVINCE TO: 410076 NO.45, CHILING ROAD, TIANXIN DISTRICT, CHANGSHA CITY, HUNAN PROVINCE |
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Effective date of registration: 20100625 Address after: 410076 Hunan province Changsha Tianxin Qu Chi Ling Road No. 45 Applicant after: Changsha University of Sciences and Technology Address before: 410076, No. 703, east 6, Changsha University of Science and Technology, 45 Leng Ling Road, Changsha, Hunan Applicant before: He Wei |
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Granted publication date: 20101110 Termination date: 20140515 |