CN217931151U - Test device for evaluating water retention of slurry under pressure - Google Patents
Test device for evaluating water retention of slurry under pressure Download PDFInfo
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- CN217931151U CN217931151U CN202221950017.XU CN202221950017U CN217931151U CN 217931151 U CN217931151 U CN 217931151U CN 202221950017 U CN202221950017 U CN 202221950017U CN 217931151 U CN217931151 U CN 217931151U
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Abstract
The utility model belongs to the technical field of the experimental technique of grouting material performance, especially, evaluate test device of thick liquid water retention under pressure, the water to current test device of evaluation thick liquid water retention under pressure accounts for than great modified water glass thick liquid solidification body under certain grouting pressure and formation pressure effect, the syneresis phenomenon can take place, and the great problem of solidification body shrinkage factor, the scheme as follows now is proposed, it includes the water collection base, the top of water collection base is provided with the standing groove, experimental container has been placed in the standing groove, the bolt hole has been seted up at the top of water collection base, bolt hole female connection has the threaded rod, be connected with the bearing board on the threaded rod, the bottom of bearing board is connected with the depression bar, the gland is installed to the bottom of depression bar, gland and experimental container looks adaptation, be provided with rigidity drainage filter screen in the experimental container, rigidity drainage filter screen is the rectangle structure, rigidity drainage filter screen and the inner wall laminating of experimental container.
Description
Technical Field
The utility model relates to a slip casting material performance test technical field especially relates to a test device of water nature is protected to evaluation thick liquid pressurized.
Background
The modified water glass slurry commonly used in water-rich formations mainly comprises an acid solution diluted to a smaller concentration by adding water and a water glass solution diluted to a certain Baume degree by adding water. In the grouting construction of the water-rich stratum, the theoretical dosage Q1 of the slurry can be obtained by multiplying the total pore volume V1 of a grouting soil body, the stratum filling coefficient 1 and the slurry loss coefficient 1, and is shown as the following formula:Q 1 ＝V 1 ·α 1 ·β 1
engineering practice and related experiments show that the modified water glass slurry solidified body with a large water ratio can generate a dehydration shrinkage phenomenon under the action of certain grouting pressure and formation pressure, and the shrinkage rate of the solidified body is large. According to the revelation of related grouting engineering, in order to effectively fill the formation pores, the actual dosage of the grout is even about 50% larger than the theoretical dosage. As a water-based slurry, the water retention under pressure of the modified water glass slurry needs to be quantitatively evaluated so as to provide predictive guidance for the slurry dosage in the construction in the future and the corresponding grouting water-stopping effect. In addition, the related slurry mostly has a certain degree of compressive dehydration property, and a test device for evaluating the compressive water retention property of the slurry is provided for truly reflecting the water retention property and shrinkage rate of the target slurry under the action of external pressure such as formation pressure, grouting pressure and the like.
The existing test device for evaluating the pressurized water retention property of the slurry has the following defects: the modified water glass slurry solidified body with a large water ratio can generate a dehydration shrinkage phenomenon under the action of a certain grouting pressure and formation pressure, and the shrinkage rate of the solidified body is large.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the problem that the water of the test device of the water retention of the present evaluation thick liquid pressurized accounts for than great modified water glass thick liquid solidification body under certain slip casting pressure and formation pressure effect, can take place the syneresis phenomenon, and the great shortcoming of solidification body shrinkage factor, and the test device of the water retention of the evaluation thick liquid pressurized that provides.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides an evaluation thick liquid is pressed and is protected test device of water nature, including the base that catchments, the top of the base that catchments is provided with the standing groove, experimental container has been placed in the standing groove, the bolt hole has been seted up at the top of the base that catchments, bolt hole female connection has the threaded rod, be connected with the board that bears the lotus on the threaded rod, the bottom of bearing the lotus board is connected with the depression bar, the gland is installed to the bottom of depression bar, gland and experimental container looks adaptation, be provided with rigidity drainage filter screen in the experimental container, rigidity drainage filter screen is the rectangle structure, the inner wall laminating of rigidity drainage filter screen and experimental container, the slip casting mouth has been seted up on experimental container's right side, the intercommunication has slip casting mechanism on the slip casting mouth.
Preferably, slip casting mechanism includes the slip casting pipe, and the intercommunication has the grouting pump on the slip casting pipe, and the intercommunication has storage bucket on the grouting pump, is provided with the valve on the slip casting pipe.
Preferably, the test container is provided with a ventilation groove, the inner wall of the bottom of the test container is provided with a plurality of drain holes, and the drain holes are communicated with the placing groove.
The utility model discloses in, an evaluation thick liquid is pressed test device of guarantor's water retention's beneficial effect:
the utility model discloses obtain thick liquid quantity V according to the volume of experimental container, dispose the thick liquid in advance in storing up the thick liquid bucket, hold lotus board and pass through the threaded rod with the base that catchments and be connected, guarantee that the gland top flushes with experimental container top, connect slip casting mouth, slip casting pipe and grouting pump, wash the slip casting pipeline immediately after the slip casting is accomplished, prevent that the thick liquid from stifled the pipe.
The utility model discloses utilize digital display compression testing machine to carry out the load test to test device, calculate the thick liquid shrinkage factor, utilize ruler volume to measure the distance delta H between thick liquid solidified body top surface and test container top surface, obtain thick liquid shrinkage factor delta = delta H/H, wherein H is the inside net height of test container, calculates the thick liquid unit volume water loss volume;
the utility model discloses four sides and the ground of experimental container are arranged in to rigidity drainage filter screen cloth, under the thick liquid pressurized state, rigidity drainage filter screen pressurized is indeformable, and the bleeding of four sides passes through side rigidity drainage filter screen drainage to bottom surface rigidity drainage filter screen, outside the experimental container of then discharge.
Drawings
FIG. 1 is a half-section front view of the testing device of the present invention;
FIG. 2 is a side view of the testing device of the present invention;
FIG. 3 is a schematic view of the pressurization test.
In the figure: 1. a water collecting base; 2. a test vessel; 3. a drain hole; 4. a rigid drainage strainer; 5. a threaded rod; 6. bolt holes; 7. a gland; 8. a pressure lever; 9. a load bearing plate; 10. a ventilation groove; 11. a placement groove; 12. a grouting port; 13. a valve; 14. a grouting pipe; 15. grouting pump; 16. a pulp storage barrel; 17. slurry solidified bodies; 18. digital display compression testing machine.
Detailed Description
The technical solutions in the embodiments will be described clearly and completely with reference to the drawings in the embodiments, and it is obvious that the described embodiments are only a part of the embodiments, but not all embodiments.
Referring to fig. 1-3, a test device for evaluating the water retention of slurry under pressure comprises a water collecting base 1, wherein a placing groove 11 is arranged at the top of the water collecting base 1, a test container 2 is placed in the placing groove 11, a bolt hole 6 is formed in the top of the water collecting base 1, a threaded rod 5 is connected with the bolt hole 6 in an internal thread manner, a bearing plate 9 is connected onto the threaded rod 5, the bottom of the bearing plate 9 is connected with a compression rod 8, a gland 7 is installed at the bottom of the compression rod 8, the gland 7 is matched with the test container 2, a rigid drainage filter screen 4 is arranged in the test container 2, the rigid drainage filter screen 4 is of a rectangular structure, the rigid drainage filter screen 4 is attached to the inner wall of the test container 2, a grouting opening 12 is formed in the right side of the test container 2, and a grouting mechanism is communicated with the grouting opening 12.
In this embodiment, slip casting mechanism includes slip casting pipe 14, and the intercommunication has slip casting pump 15 on the slip casting pipe 14, and the intercommunication has storage bucket 16 on the slip casting pump 15, is provided with valve 13 on the slip casting pipe 14.
In this embodiment, the test container 2 is provided with a ventilation groove 10, the inner wall of the bottom of the test container 2 is provided with a plurality of drain holes 3, and the drain holes 3 are communicated with the placing groove 11.
The working principle comprises the following steps: and calculating the dosage of the slurry. The amount of the slurry V is obtained according to the volume of the test container 2, and the slurry is prepared in advance in the slurry storage barrel 16.
Step two: and (6) grouting operation. The bearing plate 9 is connected with the water collecting base 1 through a threaded rod 5, the top of the gland 7 is ensured to be flush with the top of the test container 2, the grouting opening 12, the grouting pipe 14 and the grouting pump 15 are connected, and the valve 13 is opened for grouting operation. Two parameters of grouting pressure and grouting flow are determined before grouting operation. And cleaning 14 paths of the grouting pipe immediately after grouting is finished to prevent the grouting from blocking the pipe.
Step three: and (4) performing a pressurization test. After the grouting operation is finished, the grouting valve 13 is closed, the threaded rod 5 and the grouting pipe 14 are detached, and after the slurry reaches the solidification time, the digital display compression testing machine 18 is used for carrying out loading test on the testing device. For example, the loading pressure is set to be kept at 0.8MPa, namely, the water retention of the slurry is simulated and evaluated when the formation pressure is 0.8 MPa. When the water drain hole 3 does not drip into the water collecting base 1 in the constant pressure loading process, the subsequent steps are carried out.
Step four: calculating the shrinkage of the slurry. After the pressurization test is finished, measuring the distance delta H between the top surface of the slurry solidified body 17 and the top surface of the test container 2 by using the ruler to obtain the slurry shrinkage rate delta = delta H/H, wherein H is the net height of the interior of the test container 2.
Step five: and calculating the water loss per unit volume of the slurry. And weighing the mass m of the water in the water collecting base 1, wherein the water loss amount per unit volume of the slurry is eta = m/V under the action of certain pressure.
The rigid drainage filter screens 4 are arranged on four side surfaces and the ground of the test container 2, the rigid drainage filter screens 4 are not deformed under pressure when the slurry is under pressure, and bleeding water on the four side surfaces is drained to the bottom rigid drainage filter screens 4 through the side rigid drainage filter screens 4 and then is drained out of the test container 2.
The function of the ventilation groove 10 is: when the test container 2 is placed on the water collecting base 1, the space in the water collecting base 1 is communicated with the atmosphere, so that the extruded water is drained to the water collecting base 1 by gravity.
Further, the clear height H of the test vessel 2 before the grouting operation can be adjusted by the threaded rod 5, and Δ H is a value of lowering of the top surface of the slurry solidified body 17 before and after the pressure test.
Further, gland 7 cloth has waterproof rubber ring, prevents among the pressure test process that the weeping flows from gland 7, and all structures in this application can carry out the selection of material and length according to actual use condition, and the attached drawing is the schematic structure chart, and specific actual dimensions can make appropriate adjustment.
The above descriptions are only preferred embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical scope of the present invention, and the technical solutions and the utility model concepts of the present invention are equivalent to or changed within the scope of the present invention.
Claims (3)
1. The utility model provides an evaluation thick liquid is pressed and is kept test device of water nature, includes water collection base (1), and the top of water collection base (1) is provided with standing groove (11), has placed test container (2) in standing groove (11), a serial communication port, bolt hole (6) have been seted up at the top of water collection base (1), and bolt hole (6) female connection has threaded rod (5), is connected with bearing board (9) on threaded rod (5), and the bottom of bearing board (9) is connected with depression bar (8), and gland (7) are installed to the bottom of depression bar (8), and gland (7) and test container (2) looks adaptation are provided with rigidity drainage filter screen (4) in test container (2), and rigidity drainage filter screen (4) are the rectangle structure, and rigidity drainage filter screen (4) and the inner wall laminating of test container (2), and grouting opening (12) have been seted up on the right side of test container (2), and the intercommunication has the slip casting mechanism on grouting opening (12).
2. The test device for evaluating the water retention under pressure of slurry according to claim 1, wherein the grouting mechanism comprises a grouting pipe (14), the grouting pipe (14) is communicated with a grouting pump (15), the grouting pump (15) is communicated with a slurry storage barrel (16), and the grouting pipe (14) is provided with a valve (13).
3. The test device for evaluating the water retention property of the slurry under pressure according to claim 1, wherein the test container (2) is provided with a ventilation groove (10), the inner wall of the bottom of the test container (2) is provided with a plurality of drainage holes (3), and the drainage holes (3) are communicated with the placing groove (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221950017.XU CN217931151U (en) | 2022-07-27 | 2022-07-27 | Test device for evaluating water retention of slurry under pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221950017.XU CN217931151U (en) | 2022-07-27 | 2022-07-27 | Test device for evaluating water retention of slurry under pressure |
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| Publication Number | Publication Date |
|---|---|
| CN217931151U true CN217931151U (en) | 2022-11-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221950017.XU Active CN217931151U (en) | 2022-07-27 | 2022-07-27 | Test device for evaluating water retention of slurry under pressure |
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| CN (1) | CN217931151U (en) |
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2022
- 2022-07-27 CN CN202221950017.XU patent/CN217931151U/en active Active
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