CN101220587A - Pressuremeter device of rock soil in situ test instrument - Google Patents
Pressuremeter device of rock soil in situ test instrument Download PDFInfo
- Publication number
- CN101220587A CN101220587A CNA2007101922232A CN200710192223A CN101220587A CN 101220587 A CN101220587 A CN 101220587A CN A2007101922232 A CNA2007101922232 A CN A2007101922232A CN 200710192223 A CN200710192223 A CN 200710192223A CN 101220587 A CN101220587 A CN 101220587A
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- China
- Prior art keywords
- elastic membrane
- pressuremeter
- terminal jacket
- polyurethane material
- type polyurethane
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a geotechnical original testing instrument pressuremeter which comprises an elastic membrane and a terminal jacket, and is characterized in that the terminal jacket is made of polyester type polyurethane material. As the polyester type polyurethane material is characterized by high specific strength and large creep property; therefore, the terminal jacket which is made of the polyester type polyurethane material has high intensity, certain elasticity and semi-rigidity and semi-elasticity. The terminal jacket can expands with the expanding of the elastic membrane, removes the space formed in the process of testing of the terminal jacket which is made of metal, resists the elastic membrane form expanding to the space limitlessly and ensures no fracture; therefore, the invention leads the loading ability of the pressurementer to be, even more than 10.0Mpa, fully meets the demand of the reconnaissance depth and stratum of the current engineer; besides, as the space is removed, the accuracy of test data is improved.
Description
Technical field
The present invention relates to a kind of rock-soil engineering in-situ tester, particularly a kind of other improvement of testing in depths, stratum original position of pressing the other depressor of instrument.
Background technology
Other pressure instrument is a kind of in-situ test equipment in the geotechnical investigation.What pressurementer test can be used for determining foundation soil faces blow pressure and limiting pressure, with the bearing capacity of evaluation foundation soil.Pressurementer test because its test method is simple, flexibly, convenient, accurately, characteristics such as the test degree of depth is big, so developed rapidly in the geotechnical investigation in recent years, and become a kind of in-situ testing method and method of maturation at home and abroad.
The other other depressor of instrument of pressing is called probe again, is one of other critical piece of pressing instrument.In pressurementer test, implement loading to soil body hole wall by other depressor.At present; the other depressor of other pressure instrument both domestic and external all is that the overcoat elastic membrane forms on a columned metallic framework; the fixing protection of end sheath is housed at the two ends of elastic membrane; the general this end sheath that is installed in other depressor two ends is made with metal material; so in use; elastic membrane outwards expands along with the increase of pressure and is adjacent to the soil body; and the end is subjected to the restriction of protective metal shell; can't expand thereupon; owing to have the gap between the end sheath at two ends and the soil body; elastic membrane herein can not get protection in expansion process, under the effect of pressure, place, the end of elastic membrane is easy to break.Based on this reason, the present homemade other loading ability of instrument of pressing still rests on about 2.0Mpa, far can not satisfy the needs of present engineering to the prospecting degree of depth and stratum.Simultaneously owing to the error that causes experimental data at the underground volume that can't record this space.
Summary of the invention
The purpose of this invention is to provide a kind of Pressuremeter device of rock soil in situ test instrument, the end sheath of this side depressor has higher intensity certain elasticity is arranged again, the end sheath can be expanded, with the defective of avoiding end sheath recited above to exist with the expansion of elastic membrane.
The object of the present invention is achieved like this: a kind of Pressuremeter device of rock soil in situ test instrument, comprise elastic membrane and end sheath, and the fixing protection of end sheath is housed at the two ends of elastic membrane, it is characterized in that holding sheath to adopt polyester type polyurethane material to be made.
Owing to adopted technique scheme, PAUR has the specific strength height, the characteristics that creep properties is big, therefore the end sheath made from PAUR has higher intensity certain elasticity again, characteristics with half steel half elastic shape, this end sheath can expand with the expansion of elastic membrane, eliminated the end sheath made with metal material in space that process of the test forms, stoped that elastic membrane is unconfined to expand to the space, guaranteed not occur the situation of breaking herein, therefore the present invention can make the other loading ability of instrument of pressing reach 10.0Mpa even higher, fully satisfies the needs of present engineering to the prospecting degree of depth and stratum.Because eliminate in this space, improved the accuracy of experimental data simultaneously.
The specific embodiment
A kind of Pressuremeter device of rock soil in situ test instrument comprises elastic membrane and end sheath, and the end sheath is made by polyester type polyurethane material, and the fixing protection of end sheath is housed at the two ends of elastic membrane.
Claims (1)
1. a Pressuremeter device of rock soil in situ test instrument comprises elastic membrane and end sheath, and the fixing protection of end sheath is housed at the two ends of elastic membrane, it is characterized in that holding sheath to adopt polyester type polyurethane material to be made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101922232A CN101220587A (en) | 2007-12-21 | 2007-12-21 | Pressuremeter device of rock soil in situ test instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101922232A CN101220587A (en) | 2007-12-21 | 2007-12-21 | Pressuremeter device of rock soil in situ test instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101220587A true CN101220587A (en) | 2008-07-16 |
Family
ID=39630636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101922232A Pending CN101220587A (en) | 2007-12-21 | 2007-12-21 | Pressuremeter device of rock soil in situ test instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101220587A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102926369A (en) * | 2012-11-14 | 2013-02-13 | 刘潋 | Pre-boring pressure meter, self-boring pressure meter and self-boring pressure metering equipment |
| CN103821127A (en) * | 2014-03-12 | 2014-05-28 | 长江水利委员会长江科学院 | Novel high-pressure large-expansion quantity pressure gauge detector with slidable end part |
| CN106124109A (en) * | 2016-07-30 | 2016-11-16 | 中国电建集团贵阳勘测设计研究院有限公司 | Concrete pressure gauge mounting structure and mounting method thereof |
| CN106706431A (en) * | 2016-12-19 | 2017-05-24 | 青岛滨海学院 | Testing device and method for measuring tensile strength of reinforced soil |
| CN108756865A (en) * | 2018-04-13 | 2018-11-06 | 中国地质大学（武汉） | A kind of high pressure single-chamber type side pressure instrument probe |
| CN111721696A (en) * | 2020-05-12 | 2020-09-29 | 温州大学 | Underground soil body effective pressure testing device and testing method |
| CN113624619A (en) * | 2021-08-11 | 2021-11-09 | 中建路桥集团有限公司 | Measuring equipment and measuring method for shear strength and modulus of soil body |
-
2007
- 2007-12-21 CN CNA2007101922232A patent/CN101220587A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102926369A (en) * | 2012-11-14 | 2013-02-13 | 刘潋 | Pre-boring pressure meter, self-boring pressure meter and self-boring pressure metering equipment |
| CN103821127A (en) * | 2014-03-12 | 2014-05-28 | 长江水利委员会长江科学院 | Novel high-pressure large-expansion quantity pressure gauge detector with slidable end part |
| CN103821127B (en) * | 2014-03-12 | 2015-02-25 | 长江水利委员会长江科学院 | Novel high-pressure large-expansion quantity pressure gauge detector with slidable end part |
| CN106124109A (en) * | 2016-07-30 | 2016-11-16 | 中国电建集团贵阳勘测设计研究院有限公司 | Concrete pressure gauge mounting structure and mounting method thereof |
| CN106124109B (en) * | 2016-07-30 | 2018-11-02 | 中国电建集团贵阳勘测设计研究院有限公司 | Concrete pressure gauge mounting structure and mounting method thereof |
| CN106706431A (en) * | 2016-12-19 | 2017-05-24 | 青岛滨海学院 | Testing device and method for measuring tensile strength of reinforced soil |
| CN108756865A (en) * | 2018-04-13 | 2018-11-06 | 中国地质大学（武汉） | A kind of high pressure single-chamber type side pressure instrument probe |
| CN111721696A (en) * | 2020-05-12 | 2020-09-29 | 温州大学 | Underground soil body effective pressure testing device and testing method |
| CN113624619A (en) * | 2021-08-11 | 2021-11-09 | 中建路桥集团有限公司 | Measuring equipment and measuring method for shear strength and modulus of soil body |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080716 |