CN102419298A - Seepage device for slurry of coarse grained soil - Google Patents
Seepage device for slurry of coarse grained soil Download PDFInfo
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- CN102419298A CN102419298A CN2011103336824A CN201110333682A CN102419298A CN 102419298 A CN102419298 A CN 102419298A CN 2011103336824 A CN2011103336824 A CN 2011103336824A CN 201110333682 A CN201110333682 A CN 201110333682A CN 102419298 A CN102419298 A CN 102419298A
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Abstract
The invention discloses a seepage device for slurry of coarse grained soil. The seepage device comprises a slurry container, a sample container and a water storage container which are horizontally arranged and hermetically connected in orders, wherein the other end of the slurry container is connected with an external slurry source through a slurry liquid injection valve, the slurry container is further connected with a vertically arranged slurry pipe, and the slurry pipe is provided with a slurry pipe air pressure valve; the other end of the water storage container is connected with an external water source through a water inlet valve, the water storage container is further connected with a vertically arranged water pipe, and the water pipe is provided with a water pipe air pressure valve; and two grit separators are respectively located between the slurry container and the sample container, and between the water storage container and the sample container. The seepage device can simulate the seepage process of the slurry in the stratum soil body, and is used for testing the seepage conditions of the slurry in the soil body during a slurry supporting process, thereby filing the gap in the prior art.
Description
Technical field
The invention belongs to the Geotechnical Engineering equipment technical field, be specifically related to a kind of coarse-grained soil mud permeameter.
Background technology
In engineering construction, usually boring in the gravel soil stratum (like bored concrete pile etc.) or excavation deep trouth (like cut-pff wall etc.) so that poured-in-place pile foundation or deposit concrete cut-off wall.Along with the expansion and the function expansion of China's infrastructure project construction scale, the degree of depth of excavation such as cast-in-situ bored pile and cut-pff wall is increasing in the foundation works, and formation condition also becomes increasingly complex.In coarse-grained soil bad grounds such as sand, how to guarantee to hole or excavate the construction quality of deep trouth and carrying out smoothly of engineering, receive publicity.
In bad ground, improve pore-forming, the grooving quality of cast-in-situ bored pile or cut-pff wall; A crucial link be exactly smoothly, pore-forming or fluting safely; And guarantee that the stable of hole, trough wall surface, present stage mainly are to utilize the mud off technology to keep the stable of wall.Mud is called as the blood in drilling well (hole); In the process that mud permeates in the stratum; Might on hole, trough wall surface, form the mud skin; But because the complicacy of underground condition and the disguise of underground construction, people are difficult to that underground situation is had detailed understanding, particularly are difficult to the infiltration situation of mud in the mud off process is carried out thorough analysis; Stoping coming off and even the aspect role unclear understanding such as monolithic stability of slotted eye of soil particle on hole, the trough wall surface for the mud skin, the deep understanding that lacks for retaining wall mechanism.Therefore, can not carry out rational anticipation and take relative counter measures the problems that occur in the engineering, the hole incident of collapsing in the practice of construction process emerges in an endless stream, and has seriously had influence on normally carrying out of engineering.
Now, people can carry out proper process to the hole incident of collapsing that occurs in the engineering, but disposal route also mainly is the engineering experience according to the technician, lacks sufficient theoretical foundation as guidance.Therefore, necessaryly disclose the penetration mechanism of mud in the stratum, for mud off measure and cell wall stability analysis provide theoretical foundation through test.
Summary of the invention
The purpose of this invention is to provide a kind of coarse-grained soil mud permeameter, can simulate the process of osmosis of mud in the ground layer soil body, be used for testing the infiltration situation of mud off process mud in the soil body, filled up the blank of prior art.
The technical scheme that the present invention adopted is; A kind of coarse-grained soil mud permeameter; Comprise the mud container, sample receiver and the water storage container that are horizontally disposed with and are tightly connected successively; The other end of mud container is connected with outside mud source through annotating the mud fluid valve, also is connected with the mud tube of vertical setting on the mud container, and the mud tube air pressure valve is installed on the mud tube; The other end of water storage container is connected with external water source through inlet valve, also is connected with the water pipe of vertical setting on the water storage container, and the water pipe air pressure valve is installed on the water pipe; Be provided with the grit separator between mud container and the sample receiver and between water storage container and the sample receiver.
The mud container is holding mud box and holding the liquid case of being connected, and notes mud fluid valve and mud tube all are connected and hold on the mud box, hold liquid case and sample receiver and are tightly connected, and hold mud box and hold also to be provided with by-pass valve control between the liquid case.
Sample receiver is a coupon, and coupon is the drum that organic glass is processed, and its surface is provided with rule; Water storage container is a water storage box.
The grit separator comprises screen cloth and porous plate; Screen cloth is installed on the center of screen cloth installing plate; Said screen cloth installing plate closely cooperates and vertically is installed in and holds in the liquid case; Porous plate is the platy structure that the center has a plurality of through holes, and this porous plate closely cooperates and vertically is installed in the water storage box.
Also post gauze or woven wire on the porous plate.
On the screen cloth installing plate and the arranged outside that is positioned at screen cloth O type circle is arranged, on the porous plate and the outside that is positioned at a plurality of through holes also is provided with O type circle; The two ends of coupon all are fixed with connecting cylinder, and the outer end of two connecting cylinders is fixedly connected with two O type circles respectively.
Correspondence is distributed with a plurality of coupling bolt mounting holes on screen cloth installing plate and the porous plate, between this corresponding coupling bolt mounting hole, coupling bolt is installed.
The invention has the beneficial effects as follows, can the process of osmosis of real simulation mud in the ground layer soil body, be used for testing the mud off process, the infiltration situation of mud in the soil body.In process of the test, simulate the infiltration situation of mud in the soil body under the Different Strata condition through the grain composition situation, size, the pore character that change the sample soil body; Because in the stratum at different cutting depths place, the pressure during the mud infiltration is different, therefore, can simulate the process of osmosis of mud in stratum, different cutting depths place through the pressure differential that changes sample soil body both sides; The viscosity of mud self-characteristic such as mud, the silt content of mud etc.; Infiltration to mud also can cause very big influence; Therefore, can simulate the penetration signature of mud of different nature in the stratum through changing the mud self characteristics, and then analyze the influence of characteristics of mud for process of osmosis.In addition, can also pass through the forming process of analysis of experiments mud skin, and the anti-permeability performance of mud skin is studied.Utilize the present invention to carry out above experimental study, the Penetration Signature and the penetration mechanism of mud are done further discussion, to obtain more deep understanding.
Description of drawings
Fig. 1 is the structural representation of coarse-grained soil mud permeameter of the present invention;
Fig. 2 is the structural representation of screen cloth among the present invention;
Fig. 3 is the structural representation of porous plate among the present invention;
Fig. 4 is the assembling relationship figure of connecting cylinder and coupon;
Wherein, 1. mud tube 2. holds mud box, and 3. by-pass valve control 4. holds the liquid case; 5. screen cloth, 6. connecting cylinder, 7. coupling bolt, 8. coupon, 9. porous plate; 10. water storage box, 11. water pipes, 12. annotate mud fluid valves, 13. inlet valves; 14. the mud tube air pressure valve, 15. water pipe air pressure valves, 16.O type circle, 17. coupling bolt mounting holes.
Embodiment
As shown in Figure 1, coarse-grained soil mud permeameter of the present invention comprises the mud container, sample receiver and the water storage container that are horizontally disposed with and are tightly connected successively.Wherein, sample receiver is a coupon 8, the drum that coupon 8 is processed for organic glass, and its surface is provided with rule.The mud container is holding mud box 2 and holding liquid case 4 of being connected; Hold on the mud box 2 and be connected with outside mud source through annotating mud fluid valve 12; Hold the mud tube 1 that also is connected with vertical setting on the mud box 2; Mud tube air pressure valve 14 is installed on the mud tube 1, holds mud box 2 and hold and be provided with by-pass valve control 3 between the liquid case 4, hold liquid case 4 and be tightly connected with coupon 8.Water storage container is a water storage box 10, and an end of water storage box 10 is connected with coupon 8, and the other end is connected with external water source through inlet valve 13, also is connected with the water pipe 11 of vertical setting on the water storage box 10, and water pipe air pressure valve 15 is installed on the water pipe 11.Mud tube 1 all is communicated with the external gas potential source with water pipe 11, and controls through mud tube air pressure valve 14 and water pipe air pressure valve 15 respectively, is the sample both sides control head of exerting pressure.
In conjunction with Fig. 2 and shown in Figure 3, be provided with the grit separator between mud container and the sample receiver and between water storage container and the sample receiver.The grit separator comprises screen cloth 5 and porous plate 9.Screen cloth 5 is installed on the center of screen cloth installing plate, and the shape of screen cloth installing plate is consistent with the sectional elevation shape of holding liquid case 4 inner chambers, and the screen cloth installing plate closely cooperates and vertically is installed in and holds in the liquid case 4.Screen cloth 5 both can stop sandy gravel to pass through effectively, can not influence the infiltration of mud again, made the vertical excavation face in the present invention's ability real simulation actual formation.Porous plate 9 has the platy structure of a plurality of through holes for the center, and the shape of porous plate 9 is consistent with the sectional elevation shape of water storage box 10 inner chambers, and porous plate 9 closely cooperates and vertically is installed in the water storage box 10.The effect of porous plate 9 is in the permeability test process, to play preventing that sand, stone from spreading in water storage box 10 from coupon 8.When the used soil body sample particle of test is thin, on porous plate 9, post gauze or woven wire, can also not have influence on flowing of water, with warranty test result's accuracy effectively at a distance from sand like this.
As shown in Figure 4, on the screen cloth installing plate and the arranged outside that is positioned at screen cloth 5 O type circle 16 is arranged, on porous plate 9 and the outside that is positioned at a plurality of through holes also be provided with O type circle 16.The outer end that the two ends of coupon 8 all are fixed with 6, two connecting cylinders 6 of connecting cylinder of metal material is fixedly connected with two O type circles 16 respectively.O type circle 16 has been realized two connecting cylinders 6 respectively and hold being tightly connected between liquid case 4 and the water storage box 10, so realized coupon 8 with hold between the liquid case 4 and coupon 8 and water storage box 10 between tight the contact, the situation of the gas leakage that prevents to leak takes place.
Correspondence is distributed with a plurality of coupling bolt mounting holes 17 on screen cloth installing plate and the porous plate 9, between this corresponding coupling bolt mounting hole 17, coupling bolt 7 is installed.Coupling bolt 7 makes mud container, sample receiver and water storage container become an one-piece construction, has strengthened stability of structure, makes things convenient for test operation.
Assembling of the present invention and carry out the permeability test step and be:
Step 1: instrument assembling and dress appearance
Step 2: the sample immersion is also bled saturated
Close water pipe air pressure valve 15; Make inlet valve 13 be communicated with water inlet with external water source, the process of sample water inlet must be slow, lets the air in the sample have time enough to discharge; After sample soaks fully; Close and annotate mud fluid valve 12, inlet valve 13 and water pipe air pressure valve 15, and let mud tube air pressure valve 14 be connected with vacuum pump, it is saturated to bleed.
Bleed behind saturated the finishing, closing control valve 3 is placed on apparatus of the present invention integral body on the operator's console; And drain water, connect mud fluid valve 12 and the outside mud source of annotating with pipe, feed mud; The air pressure valve at mud tube air pressure valve 14 places connects vacuum pump; Let atmosphere be pressed into the mud pipe to mud through annotating mud fluid valve 12, bleed off water in the water pipe 11 simultaneously, so far test preliminary work and finish to testing desired height.
Step 3: increase the mud wall pressure and begin test
Earlier apply identical air pressure toward the sample both sides, note after a period of stabilisation this moment mud tube 1 with water pipe 11 in the height of liquid, increase mud side air pressure then and open by-pass valve control 3 simultaneously, test so far formally begins.
Because the increase of mud wall pressure, the mud in the mud tube 1 permeates to the water side through the soil particle in the coupon 8 under pressure.
Step 4: reading
Two parts content is mainly observed and is write down in reading work: by the variation of mud and water colunm height in certain time interval record mud tube 1, the water pipe 11, read through mud tube 1 and the scale on the water pipe 11; By the seepage distance of certain time interval record mud in coupon 8, read through the rule on the coupon 8.
Step 5: tear appearance open
Elder generation's closing control valve 3 is discharged mud and water respectively with inlet valve 13 from annotating mud fluid valve 12, unclamps coupling bolt 7 then, carries out the cleaning of coupon 8 and the dismounting of remainder.
The present invention can real simulated adopting the mud off technology to keep under the stable situation of groove, wall surface of the hole; The test unit of mud process of osmosis in the stratum; So that can better probe into mud flowing and coagulating property and penetration mechanism in bad grounds such as coarse-grained soil through testing; See clearly the process of osmosis of mud, the forming process of mud skin and the retaining wall mechanism of mud, and then instruct engineering practice, for practical problems existing in the engineering provides substantial theoretical foundation.
Claims (7)
1. coarse-grained soil mud permeameter; It is characterized in that; Comprise the mud container, sample receiver and the water storage container that are horizontally disposed with and are tightly connected successively; The other end of said mud container is connected with outside mud source through annotating mud fluid valve (12), also is connected with the mud tube (1) of vertical setting on the said mud container, and mud tube air pressure valve (14) is installed on the said mud tube (1); The other end of said water storage container is connected with external water source through inlet valve (13), also is connected with the water pipe (11) of vertical setting on the said water storage container, and water pipe air pressure valve (15) is installed on the said water pipe (11); Be provided with the grit separator between said mud container and the sample receiver and between water storage container and the sample receiver.
2. according to the described coarse-grained soil mud of claim 1 permeameter; It is characterized in that; Said mud container is holding mud box (2) and holding liquid case (4) of being connected; Said notes mud fluid valve (12) and mud tube (1) all are connected and hold on the mud box (2), and said liquid case (4) and the sample receiver of holding is tightly connected, said hold mud box (2) and hold also be provided with by-pass valve control (3) between the liquid case (4).
3. according to the described coarse-grained soil mud of claim 2 permeameter, it is characterized in that said sample receiver is coupon (8), the drum that said coupon (8) is processed for organic glass, and its surface is provided with rule; Said water storage container is water storage box (10).
4. according to the described coarse-grained soil mud of claim 3 permeameter; It is characterized in that; Said grit separator comprises screen cloth (5) and porous plate (9), and said screen cloth (5) is installed on the center of screen cloth installing plate, and said screen cloth installing plate closely cooperates and vertically is installed in said holding in the liquid case (4); Said porous plate (9) has the platy structure of a plurality of through holes for the center, and this porous plate (9) closely cooperates and vertically is installed in the water storage box (10).
5. according to the described coarse-grained soil mud of claim 4 permeameter, it is characterized in that said porous plate posts gauze or woven wire on (9).
6. according to the described coarse-grained soil mud of claim 4 permeameter, it is characterized in that, on the said screen cloth installing plate and the arranged outside that is positioned at screen cloth (5) O type circle (16) is arranged, said porous plate (9) is gone up and the outside that is positioned at a plurality of through holes also is provided with O type circle (16); The two ends of said coupon (8) all are fixed with connecting cylinder (6), and the outer end of said two connecting cylinders (6) is fixedly connected with two O type circles (16) respectively.
7. according to claim 1,4 or 5 described coarse-grained soil mud permeameters; It is characterized in that; Said screen cloth installing plate and said porous plate (9) are gone up correspondence and are distributed with a plurality of coupling bolt mounting holes (17), between this corresponding coupling bolt mounting hole (17), coupling bolt (7) are installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103336824A CN102419298A (en) | 2011-10-28 | 2011-10-28 | Seepage device for slurry of coarse grained soil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103336824A CN102419298A (en) | 2011-10-28 | 2011-10-28 | Seepage device for slurry of coarse grained soil |
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| CN102419298A true CN102419298A (en) | 2012-04-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011103336824A Pending CN102419298A (en) | 2011-10-28 | 2011-10-28 | Seepage device for slurry of coarse grained soil |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411869A (en) * | 2013-07-26 | 2013-11-27 | 合肥工业大学 | Negative pressure osmosis test device |
| CN105910973A (en) * | 2016-05-12 | 2016-08-31 | 长沙理工大学 | Stress-dependent coarse-grained soil seepage deformation characteristic tester and test method |
| CN106198349A (en) * | 2016-07-18 | 2016-12-07 | 广西交通科学研究院 | The method and apparatus of grouting material permeability values |
| CN107167387A (en) * | 2017-07-06 | 2017-09-15 | 中国地质大学（武汉） | A kind of landslide slip rheological test instrument and landslide slip rheological test method |
| CN107703035A (en) * | 2016-06-24 | 2018-02-16 | 中国水利水电科学研究院 | Fisstured flow test instrument under a kind of high water head high stress |
| CN110702564A (en) * | 2019-10-18 | 2020-01-17 | 郑州大学 | Horizontal type simulation stratified formation mud infiltration and soil body mechanical property change testing arrangement |
Citations (2)
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| CN2519271Y (en) * | 2001-12-21 | 2002-10-30 | 长春工程学院 | Slip casting test apparatus |
| CN101949815A (en) * | 2010-08-10 | 2011-01-19 | 清华大学 | Permeameter and permeability coefficient measuring system with same |
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2011
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2519271Y (en) * | 2001-12-21 | 2002-10-30 | 长春工程学院 | Slip casting test apparatus |
| CN101949815A (en) * | 2010-08-10 | 2011-01-19 | 清华大学 | Permeameter and permeability coefficient measuring system with same |
Non-Patent Citations (2)
| Title |
|---|
| 杨扶银: "粗粒土泥浆渗透特性及泥皮抗渗性研究", 《中国优秀硕士学位论文全文数据库 工程科技II辑》 * |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103411869A (en) * | 2013-07-26 | 2013-11-27 | 合肥工业大学 | Negative pressure osmosis test device |
| CN105910973A (en) * | 2016-05-12 | 2016-08-31 | 长沙理工大学 | Stress-dependent coarse-grained soil seepage deformation characteristic tester and test method |
| CN107703035A (en) * | 2016-06-24 | 2018-02-16 | 中国水利水电科学研究院 | Fisstured flow test instrument under a kind of high water head high stress |
| CN107703035B (en) * | 2016-06-24 | 2020-05-05 | 中国水利水电科学研究院 | Crack seepage tester under high water head-high stress action |
| CN106198349A (en) * | 2016-07-18 | 2016-12-07 | 广西交通科学研究院 | The method and apparatus of grouting material permeability values |
| CN107167387A (en) * | 2017-07-06 | 2017-09-15 | 中国地质大学（武汉） | A kind of landslide slip rheological test instrument and landslide slip rheological test method |
| CN110702564A (en) * | 2019-10-18 | 2020-01-17 | 郑州大学 | Horizontal type simulation stratified formation mud infiltration and soil body mechanical property change testing arrangement |
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Application publication date: 20120418 |