CN202710439U - Borehole pressure water-injection in-situ permeability tester - Google Patents
Borehole pressure water-injection in-situ permeability tester Download PDFInfo
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- CN202710439U CN202710439U CN 201220271220 CN201220271220U CN202710439U CN 202710439 U CN202710439 U CN 202710439U CN 201220271220 CN201220271220 CN 201220271220 CN 201220271220 U CN201220271220 U CN 201220271220U CN 202710439 U CN202710439 U CN 202710439U
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- injection pipe
- water injection
- outer tube
- wall
- water
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Abstract
The utility model discloses a borehole pressure water-injection in-situ permeability tester, which comprises the following components, namely a water injection pipe, an outer sleeve, a vent valve, a sealing ring, a gland cock and a gland cock extrusion device, wherein a water replenishing container is arranged at the upper end of the water injection pipe and an lower bulge is arranged at the lower end of the water injection pipe; the outer sleeve is movably sleeved outside the water injection pipe and an upper bulge is arranged on the outer wall of the outer sleeve; the vent valve is connected to the outer sleeve; the sealing ring is arranged between the inner wall of the outer sleeve and the outer wall of the water injection pipe and positioned above the vent valve; the gland cock is sleeved outside the outer sleeve and positioned between the lower bulge and the upper bulge; and the gland cock extrusion device comprises a nut turntable sleeved on the outer wall of the water injection pipe, the nut turntable is matched with a section of thread on the outer wall of the water injection pipe, and the upper end of the outer sleeve supports against the bottom surface of the nut turntable. The borehole pressure water-injection in-situ permeability tester can be used for testing a foundation structure with smaller permeability coefficient, provides head pressure meeting requirements and has the capabilities of testing the stable flow and finally obtaining the needed permeability coefficient.
Description
Technical field
The utility model relates to a kind of boring pressure water filling original position infiltration experiment device that is applicable to various original state grounds, Ground Treatment.
Background technology
In order to measure infiltration coefficient or impermeability, need to carry out the original position permeability test to original state ground (such as undisturbed soil, rock) or Ground Treatment structure (such as diaphram wall of slip casting ground, mixing pile and the various materials of chemical stabilization etc.), method is carried out flood-pot-test or packer permeability test after normally adopting boring.
The method of above-mentioned original position permeability test, all be as impervious medium original state ground or Ground Treatment structure, the shape coefficient of agreement tested object after the boring, utilize natural water level or other pressuring methods that head is provided, be aided with the equipment such as timing, metering, come calculation permeability coefficient k by the flow of measuring unit in the time, this is the common practise of this area.Wherein, flood-pot-test is to utilize the difference of elevation of ground and underground water table that head is provided, and general level pressure is limited, can not segmentation carry out test assessment to the larger tested object of thickness and inhomogeneous tested object; Packer permeability test is to utilize embolism that segmentation is carried out in boring, provide pressure by water pump, a kind of method of using water meter or flowmeter to measure, but the test less to infiltration coefficient, be difficult to survey because water meter or flowmeter resolution are lower and read flow, and the pulsating water pressure destructible tested object structure that water pump produces causes being difficult to obtain stable flow.
The utility model content
Problem to be solved in the utility model provides the original position infiltration experiment device that a kind of head pressure is stable, can carry out to the less tested object of infiltration coefficient sectionalization test.
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme: a kind of boring pressure water filling original position infiltration experiment device comprises with lower member: water injection pipe, and the upper end of water injection pipe is provided with the moisturizing container, and the lower end of water injection pipe is provided with lower convexity; Outer tube is enclosed within the outside of water injection pipe actively, and the outer wall of outer tube is provided with projection; Vent valve is connected on the outer tube; O-ring seal is arranged between the outer wall of the inwall of outer tube and water injection pipe, and is positioned at described vent valve top; Gland cock is enclosed within the outside of outer tube, and between described lower convexity and upper projection; The embolism pressurizing unit comprises the nut rotating disk that is enclosed within on the water injection pipe outer wall, and described nut rotating disk matches with one section screw thread on the water injection pipe outer wall, and the upper end of described outer tube withstands on the bottom surface of nut rotating disk.
Preferably, the lower end of described outer tube is provided with chute, and the lower convexity of described water injection pipe lower end passes described chute, reaches the outside of outer tube.
Preferably, described moisturizing container is bowl-shape, inside surface and is provided with scale marker.
Preferably, described water injection pipe and outer tube all are spliced by multistage by pipe adapter.
Preferably, described gland cock is made by elastomeric material.
More preferably, be equipped with annular gasket between described lower convexity and the gland cock and between upper projection and the gland cock.
The beneficial effects of the utility model are: device of the present utility model is by applying the mode of hydrostatic force to boring, can require for the test infiltration coefficient is less the moderate original state ground of test head or Ground Treatment structure, satisfactory head pressure is provided, can test stable flow, finally obtain the infiltration coefficient that needs.
Description of drawings
Fig. 1 is the schematic diagram that carries out boring pressure water filling original position permeability test.
Fig. 2 is the structural representation of a kind of boring pressure water filling of the utility model original position infiltration experiment device.
Fig. 3 is the diagrammatic cross-section at A-A place among Fig. 2.
Fig. 4 is the diagrammatic cross-section at B-B place among Fig. 2.
Among the figure:
1, tested object 2, boring
3, gland cock 4, water injection pipe
5, moisturizing container 6, metering outfit
7, time set 9, vent valve
10, outer tube 11, O-ring seal
12, nut rotating disk 21, examination section
31, annular gasket 32, annular gasket
41, lower convexity 42, pipe adapter
43, screw thread 91, three-way connection
101, upper protruding 102, pipe adapter
103, chute
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail, those skilled in the art can more clearly understand other advantages of the present utility model and effect thus.
Need to prove, the structure that Figure of description illustrates, ratio, size etc. only in order to cooperate embodiment, more clearly understand design of the present utility model for those skilled in the art, are not to limit protection domain of the present utility model.The adjustment of the modification of any structure, the change of proportionate relationship or size in the situation that do not affect effect of the present utility model and purpose is reached, all should still drop within the protection domain of the present utility model.
The utility model test unit is used for carrying out boring pressure water filling original position permeability test, and its process of the test is as follows:
As shown in Figure 1, accomplish fluently in advance first boring 2 on tested object 1, this tested object is such as being original state ground (such as undisturbed soil, rock) or Ground Treatment (such as the diaphram wall of slip casting ground, mixing pile and the various materials of chemical stabilization etc.).
Then at boring 2 interior insertions water injection pipe 4, the upper end of water injection pipe 4 is higher than upper surface (ground) certain altitude of tested object 1, satisfying a predetermined elevation, and is provided with moisturizing container 5 in the upper end of water injection pipe 4.
Between boring 2 inwalls and water injection pipe 4 gland cock 3 is set, that is to say, the below that gland cock 3 is inserted into gland cock 3 is passed in the lower end of water injection pipe 4, like this at gland cock 3 with the examination section 21 down to one section sealing of formation between the bottom of boring 2.In moisturizing container 5, add water, will fill with water in the section of examination 21 by water injection pipe 4, until the liquid levels in the water injection pipe 4 arrive in the moisturizing container 5, and write down the final position of liquid level.Because this liquid level has certain altitude, therefore in the examination section 21 interior predetermined static pressures that meet the demands that produced.
Then with time set 7 beginning timing, because the water in the examination section 21 can be to exosmosis, therefore need to pass through metering outfit 6 to the 5 interior timely moisturizings of moisturizing container, relatively stable with the liquid level in the maintenance moisturizing container 5, and then hydrostatic force keeps stablizing in predetermined elevation makes described examination section.
At last, according to the rate of water make-up in a period of time, can calculate the seepage discharge of examination section 21 within the unit interval, and then calculate the infiltration coefficient of tested object 1.
Above-mentioned by water injection pipe 4 in the process of examination section 21 interior water fillings, guarantee that the air in the section of examination 21 can discharge smoothly, as shown in Figure 1, independent gas outlet can be set, before water filling, the gland cock 3 that is enclosed within on the water injection pipe is not filled in first in the boring 2, after filling with water in the boring 2, gland cock 3 is pressed in the boring 2 again.A gland cock that can radially expand 3 perhaps is set, under original state, between the inwall of gland cock 3 and boring 2 certain gap is arranged, in the boring 2 during water filling, air can be discharged from gland cock 3 gap on every side, when gland cock 3 belows are full of by water, gland cock 3 is radially expanded, thereunder form the examination section 21 of a sealing, will provide hereinafter a kind of gland cock that can radially expand 3.Perhaps, in the situation that the water filling current are less, air even can from water injection pipe 4, discharge.
As shown in Figure 2, a kind of boring pressure water filling of the utility model original position infiltration experiment device comprises a water injection pipe 4, and the upper end of water injection pipe 4 is provided with moisturizing container 5, and the lower end of water injection pipe 4 is fixed with lower convexity 41.An outer tube 10 is enclosed within the outside of water injection pipe 4 actively, is fixed with projection 101 at the outer wall of outer tube 10; Gland cock 3 is enclosed within the outside of outer tube 10, and above-mentioned lower convexity 41 and between the projection 101, the external diameter of Sealed plug 3 and internal orifice dimension respectively with tested object on bore diameter, the external diameter of outer tube 10 be complementary.In a kind of preferred embodiment, between the lower surface of lower convexity 41 and gland cock 3, be provided with the annular gasket 31 of metal, upper protruding 101 and the upper surface of gland cock 3 between be provided with the annular gasket 32 of metal.Near on the outer wall of water injection pipe 4 upper ends, moisturizing container 5 below, be provided with one section screw thread 43, nut rotating disk 12 is enclosed within on the water injection pipe and with this screw thread 43 and matches (as shown in Figure 4), the upper end of outer tube 10 withstands on the bottom surface of nut rotating disk 12.Nut rotating disk 12 consists of the embolism pressurizing unit, when rotating nut rotating disk 12, can drive outer tube 10 with respect to water injection pipe 4 down slidings, and then outer tube 10 is by upper protruding 101 downward crush seal embolisms 3, because the lower end of gland cock 3 is fixing by the lower convexity 41 on the water injection pipe 4, like this, gland cock 3 just is clamped between lower convexity 41 and upper protruding 101, gland cock 3 is preferably made by elastomeric material, in the situation that axial grip can radially expand.
When the utility model test unit inserts in the boring of tested object, utilize embolism pressurizing unit crush seal embolism 3, it is radially expanded, can between gland cock 3 and drill hole inner wall, form reliably and seal.
In the utility model, outer tube 10 is except be used for installing gland cock 3, and attaching nut rotating disk 12 is used for outside the crush seal embolism 3, and the cavity between outer tube 10 and the water injection pipe 4 also is used as gas outlet.As shown in Figure 2, connect vent valve 9 at outer tube 10, vent valve 9 is connected on the outer tube 10 by a three-way connection 91, is provided with O-ring seal 11 above vent valve 9 and three-way connection 91, and O-ring seal 11 is arranged between the outer wall of the inwall of outer tube 10 and water injection pipe 4.When the utility model test unit inserts in the boring of tested object, form the examination section of sealing below 3 at gland cock, by water injection pipe 4 in the examination section during water filling, vent valve 9 is opened, air in the examination section is discharged by outer tube 10 and vent valve 9, when having water to overflow in the vent valve 9, is full of by water in the examination section, should close vent valve 9, to avoid making the water pressure in the examination section can't reach predetermined value because leaking.Then continue to add water, until the liquid level in the water injection pipe 4 arrives in the moisturizing container 5, make the hydrostatic force in the examination section reach predetermined value.Preferably, moisturizing container 5 is bowl-shape, inside surface and is provided with scale marker.And, for the height that makes moisturizing container 5 adjustable, thereby in examination section the different hydrostatic force of formation, water injection pipe 4 and outer tube 10 can be spliced by multistage, connected by pipe adapter 42,102 between the pipeline section, the quantity of increase and decrease pipeline section can be regulated the height of moisturizing container 5.Described protruding 101 can directly be made of one of them pipe adapter 102 on the outer tube.
In conjunction with Fig. 2, Fig. 3, a kind of preferred arrangement of lower convexity 41 is, lower convexity 41 is the metal welding block, being the disc shape along the outer wall of water injection pipe 4 stretches out, be provided with longitudinally chute 103 in the lower end of outer tube 10, lower convexity 41 passes described chute 103, reaches the outside of outer tube 10, thereby gland cock 3 is played position-limiting action.
The utility model is specially adapted to carry out ask for something and adopts fix-head pressure, sectionalization test and the less original position permeability test of tested object infiltration coefficient.
Claims (6)
1. a boring pressure water filling original position infiltration experiment device is characterized in that, comprises with lower member:
Water injection pipe, the upper end of water injection pipe is provided with the moisturizing container, and the lower end of water injection pipe is provided with lower convexity;
Outer tube is enclosed within the outside of water injection pipe actively, and the outer wall of outer tube is provided with projection;
Vent valve is connected on the outer tube;
O-ring seal is arranged between the outer wall of the inwall of outer tube and water injection pipe, and is positioned at described vent valve top;
Gland cock is enclosed within the outside of outer tube, and between described lower convexity and upper projection;
The embolism pressurizing unit comprises the nut rotating disk that is enclosed within on the water injection pipe outer wall, and described nut rotating disk matches with one section screw thread on the water injection pipe outer wall, and the upper end of described outer tube withstands on the bottom surface of nut rotating disk.
2. infiltration experiment device according to claim 1 is characterized in that, the lower end of described outer tube is provided with chute, and the lower convexity of described water injection pipe lower end passes described chute, reaches the outside of outer tube.
3. infiltration experiment device according to claim 1 is characterized in that, that described moisturizing container is is bowl-shape, inside surface is provided with scale marker.
4. infiltration experiment device according to claim 1 is characterized in that, described water injection pipe and outer tube all are spliced by multistage by pipe adapter.
5. infiltration experiment device according to claim 1 is characterized in that, described gland cock is made by elastomeric material.
6. infiltration experiment device according to claim 5 is characterized in that, is equipped with annular gasket between described lower convexity and the gland cock and between upper projection and the gland cock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220271220 CN202710439U (en) | 2012-06-08 | 2012-06-08 | Borehole pressure water-injection in-situ permeability tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220271220 CN202710439U (en) | 2012-06-08 | 2012-06-08 | Borehole pressure water-injection in-situ permeability tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202710439U true CN202710439U (en) | 2013-01-30 |
Family
ID=47590730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220271220 Withdrawn - After Issue CN202710439U (en) | 2012-06-08 | 2012-06-08 | Borehole pressure water-injection in-situ permeability tester |
Country Status (1)
| Country | Link |
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| CN (1) | CN202710439U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721634A (en) * | 2012-06-08 | 2012-10-10 | 上海勘测设计研究院 | Method and device for in-situ penetration test by means of water injection under drilling pressure |
| CN109709018A (en) * | 2019-01-22 | 2019-05-03 | 南京大学 | A kind of tunnel rich water fault belt infiltration coefficient in-site detecting device |
| CN110927043A (en) * | 2019-12-11 | 2020-03-27 | 天津市市政工程设计研究院 | Device for rapidly measuring plain soil filling permeability coefficient in sponge city construction |
-
2012
- 2012-06-08 CN CN 201220271220 patent/CN202710439U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721634A (en) * | 2012-06-08 | 2012-10-10 | 上海勘测设计研究院 | Method and device for in-situ penetration test by means of water injection under drilling pressure |
| CN102721634B (en) * | 2012-06-08 | 2014-12-03 | 上海勘测设计研究院 | Method and device for in-situ penetration test by means of water injection under drilling pressure |
| CN109709018A (en) * | 2019-01-22 | 2019-05-03 | 南京大学 | A kind of tunnel rich water fault belt infiltration coefficient in-site detecting device |
| CN109709018B (en) * | 2019-01-22 | 2020-08-14 | 南京大学 | Tunnel rich water fault broken zone permeability coefficient in-situ measuring device |
| CN110927043A (en) * | 2019-12-11 | 2020-03-27 | 天津市市政工程设计研究院 | Device for rapidly measuring plain soil filling permeability coefficient in sponge city construction |
| CN110927043B (en) * | 2019-12-11 | 2022-04-19 | 天津市市政工程设计研究院 | Device for rapidly measuring plain soil filling permeability coefficient in sponge city construction |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI QING CAO SHA WATER ENGINEERING COL, LTD.; Effective date: 20140606 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Cao Yuansheng Inventor after: Cang Guangwen Inventor after: Zhang Huineng Inventor after: Xu Feng Inventor after: Cao Jian Inventor after: Lu Xiaoru Inventor after: Lu Yufang Inventor after: Liu Dongkun Inventor after: Ye Yuanxin Inventor after: Huang Jianhua Inventor after: Wang Qi Inventor after: Xie Xiankun Inventor after: Chen Gang Inventor before: Cao Yuansheng Inventor before: Liu Dongkun Inventor before: Wang Qi Inventor before: Chen Gang Inventor before: Cang Guangwen Inventor before: Zhang Huineng Inventor before: Xu Feng Inventor before: Cao Jian |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: CAO YUANSHENG LIU DONGKUN WANG QI CHEN GANG ZANG GUANGWEN ZHANG HUINENG XUFENG CAO JIAN TO: CAO YUANSHENG LU XIAORU LU YUFANG LIU DONGKUN YE YUANXIN HUANG JIANHUA WANG QI XIE XIANKUN CHEN GANG ZANG GUANGWEN ZHANG HUINENG XU FENG CAO JIAN |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20140606 Address after: 200434 Shanghai city Hongkou District Yixian Road No. 388 Patentee after: Shanghai Investigation Design & Research Institute Patentee after: Shanghai Qingcaosha Investment Construction Development Co., Ltd. Patentee after: Shanghai Water Engineering Design & Research Institute Co., Ltd. Address before: 200434 Shanghai city Hongkou District Yixian Road No. 388 Patentee before: Shanghai Investigation Design & Research Institute |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20130130 Effective date of abandoning: 20141203 |
|
| RGAV | Abandon patent right to avoid regrant |