CN102128775A - Detachable constant head permeability coefficient tester - Google Patents
Detachable constant head permeability coefficient tester Download PDFInfo
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- CN102128775A CN102128775A CN 201010611151 CN201010611151A CN102128775A CN 102128775 A CN102128775 A CN 102128775A CN 201010611151 CN201010611151 CN 201010611151 CN 201010611151 A CN201010611151 A CN 201010611151A CN 102128775 A CN102128775 A CN 102128775A
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- filter screen
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Abstract
The invention discloses a detachable constant head permeability coefficient tester which comprises a base, a permeation cylinder having two open ends, a big filter screen, small filter screens, a metal pore plate, pressure-measuring pins and pressure-measuring tubes, wherein the permeation cylinder is detachably arranged on the base; five bulges are arranged at intervals on the outer surface of the side wall of the permeation cylinder; pressure-measuring through holes which are matched with the pressure-measuring pins are respectively arranged on each bulge and the side wall of the permeation cylinder which is jointed with the bulge; the pressure-measuring pins and the pressure-measuring through holes are in liquid sealing connection; each pressure-measuring pin is fastened by a stopping plate which is arranged on the outer end face of the pressure-measuring through hole; a lifting carriage for supporting the screen body of the big filter screen is arranged between the big filter screen and the base; the permeation cylinder, the pressure-measuring pins and the pressure-measuring tubes are mutually communicated through fluid; and each small filter screen is arranged at one end of each pressure-measuring pin adjacent to the side wall of the permeation cylinder. The detachable constant head permeability coefficient tester has a simple structure, can be conveniently operated, and is low in cost. By using a convenient method, the problems that the filter screens are broken and the parts are difficult to replace and clean because the pressure-measuring holes are easily blocked and compacted by soil particles in the test process are solved.
Description
Technical field
The present invention relates to a kind of osmotic coefficient investigating device, especially be particularly related to a kind of detachable constant head permeability coefficient determinator of detachable cleaning.
Background technology
Infiltration is the phenomenon that liquid moves in continuous pore media, and infiltration coefficient is a quantitative target of expressing this phenomenon.Phreatic supply and drainage condition, and the seepage velocity in soil is all relevant with the infiltration coefficient of soil.Infiltration coefficient is important parameters in the Geotechnical Engineering design and construction, therefore tests out this parameter exactly for the seepage stability of analyzing excavation slope, and the speed of calculating settlement of foundation and underground water water yield etc. are all very important.The osmotic coefficient investigating of coarse-grained soil adopts constant head permeability test in the actual tests.
At present, the general constant head permeameter of Shi Yonging, its pressure tap place is often blocked by fine grained, and build-up of pressure can't accurately be surveyed and read, even if filter screen is set in pressure tap, still has the problem of blocking and can not take out cleaning after long-term the use.And for the soil body sample of different packings, the measurement of its infiltration coefficient is one of main task of permeability test, but conventional permeameter is all because of being provided with support (in order not influence current under the filter screen, be provided with between filter screen and metal perforated plate at interval), when hitting real soil body sample, easily cause filter screen to break, and can't change after the filter screen breakage, therefore the mensuration to highly dense solidity soil body sample infiltration coefficient realizes than difficult.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, a kind of detachable constant head permeability coefficient determinator is provided, and it can be cleared up fast to filter screen, can provide enough support tension force to filter screen simultaneously, when avoiding permeating the soil body sample of loading highly dense solidity in the tube, damage filter screen.
For realizing above technical purpose, the present invention will take following technical scheme:
A kind of detachable constant head permeability coefficient determinator, comprise infiltration tube, big filter screen, little filter screen, metal perforated plate, pressure measurement pin and piezometric tube that base, open at both ends are provided with, described infiltration tube is removably mounted on the base, and the sidewall outside surface compartment of terrain of infiltration tube is provided with five projections, the infiltration tube side wall surface that each projection reaches with it is connected mutually runs through all respectively offers the pressure measurement through hole suitable with the pressure measurement pin, described pressure measurement pin is connected with pressure measurement through hole liquid sealing, and the catch that the pressure measurement pin is installed by pressure measurement through hole outside end face is fastening; The end face of described big filter screen is placed on the flange of infiltration tube internal face setting, but and be provided with the bracing frame that is used to support big filter screen dictyosome of rigidity lifting between big filter screen and the base, fluid perforation mutually between described infiltration tube, pressure measurement pin and the piezometric tube, and the end that the pressure measurement pin is adjacent with infiltration tube side wall surface is installed little filter screen, and the pressure measurement pin other end then is connected with piezometric tube.
Described pressure measurement pin is stepped, and this stepped pressure measurement pin is three sections, and the two ends diameter is less, and the interlude diameter is bigger, socket watertight rubber on the described stepped pressure measurement pin, and watertight rubber and interlude fit towards the end face of infiltration tube.
Vertically offer the annular receiving groove that is used for ccontaining little filter screen on the body of rod of described pressure measurement pin, described little filter screen is clamped between the bottom land of this annular receiving groove and the groove top, and the cell wall of annular receiving groove offers and is used for the breach that little filter screen passes.
The bottom land of described annular receiving groove or groove top are semicircular ring.
Support frame as described above comprises support, connecting rod and metal perforated plate, described support is welded on the base top, and an end of connecting rod is fixedlyed connected with the middle part of metal perforated plate, the connecting rod other end passes the base setting, and connecting rod is connected with whorl of base, the end of described big filter screen is provided with annular flange flange, and the annular flange flange of described big filter screen is socketed in the support periphery, and metal perforated plate places big filter screen below.
The end cross-sectional that described connecting rod passes base is sexangle, and described connecting rod and metal perforated plate are welded to connect.
Described base offers annular groove, and described infiltration tube places in the annular groove, and infiltration tube is threaded with annular groove, and installation rubber band sealing between the bottom land of infiltration tube end and annular groove.
According to above technical scheme, can realize following beneficial effect:
1, pressure measurement pin of the present invention and pressure measurement through hole are pegged graft, and liquid sealing is connected between pressure measurement pin and the pressure measurement through hole, and employing water stop rubber circle carries out liquid sealing, and therefore, not only hermetic seal is effective, and convenient disassembly; Simultaneously, little filter screen is installed on the pressure measurement pin, base supports filter screen by bracing frame, can effectively stop fine grained soil by and be convenient to cleaning and change;
2, bracing frame of the present invention comprises support, connecting rod and metal perforated plate.No matter the mechanism that support, connecting rod and metal perforated plate are formed laterally or vertically provide enough supports can for big filter screen, avoids soil body sample in the infiltration tube hit and causes big filter screen breakage in real time;
3, metal perforated plate and threaded connecting rod welding can reduce metal perforated plate by turn interlinking lever end sexangle notch, makes it to separate with big filter screen, and then is beneficial to soil water by big filter screen; Also but the turn base removes support, and the cleaning of being convenient to big filter screen is changed;
Therefore, constant head permeability coefficient determinator of the present invention, detachable cleaning, simple in structure, easy to operate, with low cost, solved that pressure tap blocks in the process of the test, hit and cause the big filter screen to break and filtering net part is changed a difficult problem of cleaning in fact with easy method, be a kind of very practical and device efficiently.
Description of drawings
Fig. 1 is the patent device structural representation;
Fig. 2 is an infiltration barrel structure synoptic diagram;
Fig. 3 is the A-A sectional view among Fig. 2;
Fig. 4 is big filter screen vertical view;
Fig. 5 is the front elevation of Fig. 4;
Fig. 6 is the vertical view of base;
Fig. 7 is the front elevation of Fig. 6;
Fig. 8 is the vertical view of metal perforated plate;
Fig. 9 is the front elevation of Fig. 8;
Figure 10 is the vertical view of pressure measurement pin;
Figure 11 is the front elevation of Figure 10;
Figure 12 is the B-B sectional view among Figure 10;
Figure 13 is the structural representation of little filter screen;
Wherein: 1, pressure measurement pin; 2, pressure measurement through hole; 3, projection; 4, little filter screen; 5, infiltration tube; 6, metal perforated plate; 7, big filter screen; 8, piezometric tube; 9, rubber band; 10, connecting rod; 11, support; 12, base; 13, annular flange flange; 14, hexagonal breach; 15, watertight rubber; 16, catch; 17, screw.
Embodiment
Accompanying drawing discloses the structural representation of preferred embodiment involved in the present invention without limitation, explains technical scheme of the present invention below with reference to accompanying drawing.
As Fig. 1, Fig. 2 and shown in Figure 3, detachable constant head permeability coefficient determinator of the present invention, comprise base, the infiltration tube that open at both ends is provided with, big filter screen, little filter screen, metal perforated plate, pressure measurement pin and piezometric tube, described infiltration tube is removably mounted on the base, and the sidewall outside surface compartment of terrain of infiltration tube is provided with five projections, the infiltration tube side wall surface that each projection reaches with it is connected mutually runs through all respectively offers the pressure measurement through hole suitable with the pressure measurement pin, described pressure measurement pin is connected with pressure measurement through hole liquid sealing, and the catch that the pressure measurement pin is installed by pressure measurement through hole outside end face is fastening; The end face of described big filter screen is placed on the flange of infiltration tube internal face setting, but and be provided with the bracing frame that is used to support big filter screen dictyosome of rigidity lifting between big filter screen and the base, fluid perforation mutually between described infiltration tube, pressure measurement pin and the piezometric tube, and the end that the pressure measurement pin is adjacent with infiltration tube side wall surface is installed little filter screen, and the pressure measurement pin other end then is connected with piezometric tube.
Extremely shown in Figure 9 as Fig. 1, Fig. 6, support frame as described above comprises support, connecting rod and metal perforated plate, described support is welded on the base top, and an end of connecting rod is fixedlyed connected with the middle part of metal perforated plate, the connecting rod other end passes the base setting, and connecting rod is connected with whorl of base, and the reach that is provided with on the described connecting rod is 10-15mm; As shown in Figure 4 and Figure 5, the end of described big filter screen is provided with annular flange flange, and the annular flange flange of described big filter screen is socketed in the support periphery, makes support to provide enough tension force to filter screen, and metal perforated plate is positioned at the dictyosome below of big filter screen.The end cross-sectional that described connecting rod passes base is sexangle, then can rotate lever regulated metal perforated plate height with hex wrench, makes it with the contact of big filter screen or separate, and described connecting rod and metal perforated plate are welded to connect.Described base offers annular groove, described infiltration tube places in the annular groove, the infiltration tube is threaded with annular groove, perhaps infiltration tube and annular groove clamping, and the jointing line of infiltration tube end and annular groove is progressive curve, in addition, between the bottom land of infiltration tube end and annular groove the rubber band sealing is installed.
Shown in Figure 11 to 13, described pressure measurement pin is stepped, and this stepped pressure measurement pin is three sections, and the two ends diameter is less, and the interlude diameter is bigger, socket watertight rubber on the described stepped pressure measurement pin, and watertight rubber and interlude fit towards the end face of infiltration tube.Therefore, the pressure measurement pin for can be plugged in infiltration tube sidewall hole in logical variable cross section cylindrical metal parts, vertically offer the annular receiving groove that is used for ccontaining little filter screen on the body of rod of described pressure measurement pin, described little filter screen is clamped between the bottom land of this annular receiving groove and the groove top, and the cell wall of annular receiving groove offers and is used for the breach that little filter screen passes.The bottom land of described annular receiving groove or groove top are semicircular ring.
The present invention is used for constant head permeability parameters determination test, key step is as follows: earlier little filter screen is inserted in the annular receiving groove of one end setting before the pressure measurement pin is installed, and on the pressure measurement pin socket watertight rubber, unscrew screw, remove catch, the side wall surface that then the pressure measurement pin is inserted in the infiltration tube is offered in the pressure measurement through hole, and catch is retracted original position, screws screw and fixes; Before the mounting seat, earlier connecting rod is screwed in the base screw socket together with metal perforated plate, big filter screen is placed on the support of base, on base, overlap rubber band, screw in the infiltration tube bottom, when the inner draw-in groove of big filter screen contact infiltration tube, stop revolving, with the position of fixing big filter screen; Before hitting real sample,,, it is lining under the big filter screen, begins to banket and hit reality, revolve low metal perforated plate 10mm again after hitting real the end, influence the mobile of water in avoiding testing with the rising metal perforated plate with hex wrench rotating metallic connecting rod bottom.(GB/T50123-1999) test according to State Standard of the People's Republic of China's " Standard for test methods of earthworks ".After the off-test, clearance test screws off base with soil, checks big filter screen operating position, and takes out and clean.Push catch aside, extract the pressure measurement pin, take out little filter screen with tweezers and clean.
Claims (7)
1. detachable constant head permeability coefficient determinator, it is characterized in that: comprise infiltration tube, big filter screen, little filter screen, metal perforated plate, pressure measurement pin and piezometric tube that base, open at both ends are provided with, described infiltration tube is removably mounted on the base, and the sidewall outside surface compartment of terrain of infiltration tube is provided with five projections, the infiltration tube side wall surface that each projection reaches with it is connected mutually runs through all respectively offers the pressure measurement through hole suitable with the pressure measurement pin, described pressure measurement pin is connected with pressure measurement through hole liquid sealing, and the catch that the pressure measurement pin is installed by pressure measurement through hole outside end face is fastening; The end face of described big filter screen is placed on the flange of infiltration tube internal face setting, but and be provided with the bracing frame that is used to support big filter screen dictyosome of rigidity lifting between big filter screen and the base, fluid perforation mutually between described infiltration tube, pressure measurement pin and the piezometric tube, and the end that the pressure measurement pin is adjacent with infiltration tube side wall surface is installed little filter screen, and the pressure measurement pin other end then is connected with piezometric tube.
2. according to the described detachable constant head permeability coefficient determinator of claim 1, it is characterized in that: described pressure measurement pin is stepped, this stepped pressure measurement pin is three sections, the two ends diameter is less, and the interlude diameter is bigger, socket watertight rubber on the described stepped pressure measurement pin, and watertight rubber and interlude fit towards the end face of infiltration tube.
3. according to claim 1 or 2 described detachable constant head permeability coefficient determinators, it is characterized in that: vertically offer the annular receiving groove that is used for ccontaining little filter screen on the body of rod of described pressure measurement pin, described little filter screen is clamped between the bottom land of this annular receiving groove and the groove top, and the cell wall of annular receiving groove offers and is used for the breach that little filter screen passes.
4. according to the described detachable constant head permeability coefficient determinator of claim 3, it is characterized in that: the bottom land of described annular receiving groove or groove top are semicircular ring.
5. according to the described detachable constant head permeability coefficient determinator of claim 1, it is characterized in that: support frame as described above comprises support, connecting rod and metal perforated plate, described support is welded on the base top, and an end of connecting rod is fixedlyed connected with the middle part of metal perforated plate, the connecting rod other end passes the base setting, and connecting rod is connected with whorl of base, and the end of described big filter screen is provided with annular flange flange, the annular flange flange of described big filter screen is socketed in the support periphery, and metal perforated plate places big filter screen below.
6. according to the described detachable constant head permeability coefficient determinator of claim 5, it is characterized in that: the end cross-sectional that described connecting rod passes base is sexangle, and described connecting rod and metal perforated plate are welded to connect.
7. according to the described detachable constant head permeability coefficient determinator of claim 1, it is characterized in that: described base offers annular groove, described infiltration tube places in the annular groove, and the infiltration tube is threaded with annular groove, and between the bottom land of infiltration tube end and annular groove the rubber band sealing is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010611151 CN102128775B (en) | 2010-12-29 | 2010-12-29 | Detachable constant head permeability coefficient tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010611151 CN102128775B (en) | 2010-12-29 | 2010-12-29 | Detachable constant head permeability coefficient tester |
Publications (2)
| Publication Number | Publication Date |
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| CN102128775A true CN102128775A (en) | 2011-07-20 |
| CN102128775B CN102128775B (en) | 2013-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010611151 Expired - Fee Related CN102128775B (en) | 2010-12-29 | 2010-12-29 | Detachable constant head permeability coefficient tester |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102445395A (en) * | 2011-10-10 | 2012-05-09 | 沈阳重型机械集团有限责任公司 | Residue soil improvement experimental device for shield method tunnel construction |
| CN103149143A (en) * | 2013-03-04 | 2013-06-12 | 黄河水利委员会黄河水利科学研究院 | Device and method for determining permeability coefficient of coarse-grained soil with super large grain size |
| CN104155229A (en) * | 2014-08-13 | 2014-11-19 | 河海大学 | Portable device for soil surface in situ vertical permeability experiment |
| CN104878735A (en) * | 2015-04-21 | 2015-09-02 | 中铁上海设计院集团有限公司 | Soil osmotic coefficient in-situ testing device and testing method thereof |
| CN105588796A (en) * | 2015-12-17 | 2016-05-18 | 扬州大学 | Device for accurately and rapidly determining permeability coefficient of soil |
| CN106092849A (en) * | 2016-05-27 | 2016-11-09 | 北京交通大学 | A kind of sand-pebble layer earth pressure balanced shield, EPBS driving anti-gush experimental provision and method |
| CN107014739A (en) * | 2017-06-16 | 2017-08-04 | 成都理工大学 | Undisturbed soil infiltration experiment device and the method for measuring infiltration coefficient |
| CN109932299A (en) * | 2019-03-20 | 2019-06-25 | 山东大学 | Infiltration experiment device and method under the conditions of a kind of simulated ground stress |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU442771A1 (en) * | 1973-01-05 | 1974-09-15 | Московская Ордена Ленина И Ордена Трудового Красного Знамени Сельскохозяйственная Академия Им.К. А.Тимирязева | Device for isolating seeds from soil weights |
| JP2008023469A (en) * | 2006-07-21 | 2008-02-07 | Kitakyushu Foundation For The Advancement Of Industry Science & Technology | Suspended fine particle collection apparatus |
| CN101813607A (en) * | 2010-05-11 | 2010-08-25 | 中国科学院地质与地球物理研究所 | One-dimensional confining loading hydraulic permeability coefficient tester |
-
2010
- 2010-12-29 CN CN 201010611151 patent/CN102128775B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU442771A1 (en) * | 1973-01-05 | 1974-09-15 | Московская Ордена Ленина И Ордена Трудового Красного Знамени Сельскохозяйственная Академия Им.К. А.Тимирязева | Device for isolating seeds from soil weights |
| JP2008023469A (en) * | 2006-07-21 | 2008-02-07 | Kitakyushu Foundation For The Advancement Of Industry Science & Technology | Suspended fine particle collection apparatus |
| CN101813607A (en) * | 2010-05-11 | 2010-08-25 | 中国科学院地质与地球物理研究所 | One-dimensional confining loading hydraulic permeability coefficient tester |
Non-Patent Citations (1)
| Title |
|---|
| 《GB/T50123-1999 土工试验方法标准》 19990610 盛树馨等 13 渗透试验 , 2 * |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102445395A (en) * | 2011-10-10 | 2012-05-09 | 沈阳重型机械集团有限责任公司 | Residue soil improvement experimental device for shield method tunnel construction |
| CN102445395B (en) * | 2011-10-10 | 2013-04-17 | 沈阳重型机械集团有限责任公司 | Residue soil improvement experimental device for shield method tunnel construction |
| CN103149143A (en) * | 2013-03-04 | 2013-06-12 | 黄河水利委员会黄河水利科学研究院 | Device and method for determining permeability coefficient of coarse-grained soil with super large grain size |
| CN104155229A (en) * | 2014-08-13 | 2014-11-19 | 河海大学 | Portable device for soil surface in situ vertical permeability experiment |
| CN104155229B (en) * | 2014-08-13 | 2015-06-03 | 河海大学 | Portable device for soil surface in situ vertical permeability experiment |
| CN104878735A (en) * | 2015-04-21 | 2015-09-02 | 中铁上海设计院集团有限公司 | Soil osmotic coefficient in-situ testing device and testing method thereof |
| CN105588796A (en) * | 2015-12-17 | 2016-05-18 | 扬州大学 | Device for accurately and rapidly determining permeability coefficient of soil |
| CN105588796B (en) * | 2015-12-17 | 2018-01-23 | 扬州大学 | A kind of device of accurate quick measure soil permeability coefficient |
| CN106092849A (en) * | 2016-05-27 | 2016-11-09 | 北京交通大学 | A kind of sand-pebble layer earth pressure balanced shield, EPBS driving anti-gush experimental provision and method |
| CN106092849B (en) * | 2016-05-27 | 2019-02-05 | 北京交通大学 | A kind of sand-pebble layer earth pressure balanced shield, EPBS driving anti-gush experimental provision and method |
| CN107014739A (en) * | 2017-06-16 | 2017-08-04 | 成都理工大学 | Undisturbed soil infiltration experiment device and the method for measuring infiltration coefficient |
| CN107014739B (en) * | 2017-06-16 | 2023-09-08 | 成都理工大学 | Undisturbed soil permeability test device and permeability coefficient measurement method |
| CN109932299A (en) * | 2019-03-20 | 2019-06-25 | 山东大学 | Infiltration experiment device and method under the conditions of a kind of simulated ground stress |
| CN109932299B (en) * | 2019-03-20 | 2020-08-25 | 山东大学 | Penetration test device and method under simulated ground stress condition |
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|---|---|
| CN102128775B (en) | 2013-05-15 |
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