CN212432897U - Slurry crack grouting simulation device under high water pressure - Google Patents
Slurry crack grouting simulation device under high water pressure Download PDFInfo
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- CN212432897U CN212432897U CN202020874520.6U CN202020874520U CN212432897U CN 212432897 U CN212432897 U CN 212432897U CN 202020874520 U CN202020874520 U CN 202020874520U CN 212432897 U CN212432897 U CN 212432897U
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Abstract
A high-water-pressure slurry crack grouting simulation device is characterized in that a round upper steel plate and a round lower steel plate are connected through bolts, a distance control steel wire is arranged in a middle crack, and a sealing ring is arranged around the crack; the center of the upper steel plate is provided with a grouting hole, the grouting hole is connected with a grouting pump, and the grouting pump is communicated with a high-temperature grouting system; a water pressure hole and a water drainage hole are respectively arranged on two sides of the grouting hole at equal intervals, the water pressure hole is connected with a high-pressure water pump and communicated with a water source, and the water drainage hole is wrapped by geotextile; the device has the advantages that the grouting diffusion distance and the diffusion speed of different opening cracks in the forward and reverse water flow directions under high water pressure can be measured, and a test foundation is provided for dam foundation grouting during the dam operation period.
Description
Technical Field
The utility model relates to a crack slip casting simulation technology field, concretely relates to thick liquid crack slip casting analogue means under high water pressure.
Background
Along with the continuous development of water conservancy and hydropower construction, engineering geology encountered by a dam foundation is more and more complicated and changeable, and although the dam foundation is subjected to grouting seepage-proofing treatment in the construction period, the dam foundation seepage phenomenon occurs under the pressure difference of an upstream water head and a downstream water head after a part of dams built on a complicated rock stratum are stored with random crack distribution. Therefore, how to block rock cracks under high water pressure is researched, and blocking of leakage channels is an important subject in safe operation of the dam. The grouting technology is one of the most effective methods for solving the threat of the dam foundation rock mass crack leakage disaster, and the main principle is that slurry is poured into the rock mass crack through pressure feeding equipment such as a grouting pump and the like to be permeated, diffused, gelled or solidified so as to improve the integrity and the seepage-proofing capacity of the dam foundation.
At present, model tests or field tests are lacked to verify the diffusion rule of cement slurry under high water pressure, and systematic research on the diffusion rule of high water pressure grouting under a crack condition is less. The utility model aims to provide a grout crack slip casting analogue test method and device under high water pressure at the grout diffusion distance and the diffusion rate of laboratory simulation dam foundation rock mass crack slip casting to data that are close actual slip casting are provided.
According to the research literature data at home and abroad, the patent of the current simulation fracture grouting device is a high-pressure fracture grouting simulation test bed, and the patent is mainly used for the research of the high-pressure grouting process parameters of deep stratum fractures. The system mainly comprises a fracture model connected fracture water pressure control system and a computer automatic monitoring system. The experiment table can simulate grouting in water-containing fractures with different widths, can research the change rule of grouting pressure in the grouting process, can automatically monitor parameters such as grouting pressure, grouting amount and the like by a computer, and can detect the grouting effect, particularly the water plugging and permeability resistance; the patent relates to a simulation test device and a test method for visually detecting crack grouting, wherein an organic glass test box body is used as a containing space, and grouting is performed into a simulated crack of a coal seam floor through a high-pressure grouting pump, so that simulation of a high-pressure grouting effect of the crack of the coal seam floor is realized.
The monitoring system of the disclosed technology adopts the pressure sensor to measure the pressure change, so as to determine the diffusion rule of the slurry, and the method has low accuracy; the fracture water of the prior art is still water, and the dynamic water pressure fracture grouting can not be simulated, so the simulation has certain limitation.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a thick liquid crack slip casting analogue means under high water pressure, the thick liquid diffusion distance and the diffusion rate of dam foundation crack slip casting in laboratory simulation dam operation period to provide the data that are close actual conditions.
In order to achieve the technical purpose, the utility model adopts the following technical scheme:
the utility model provides a thick liquid crack slip casting analogue means under high water pressure which characterized in that: the steel plate comprises an upper steel plate and a lower steel plate which are arranged correspondingly from top to bottom and connected through bolts, a distance control piece is arranged in a middle crack, and a sealing ring is arranged around the crack; the center of the upper steel plate is provided with a grouting hole, the grouting hole is connected with a grouting pump, and the grouting pump is communicated with a high-temperature grouting system; a water pressure hole and a water drain hole are respectively arranged on two sides of the grouting hole at equal intervals, the water pressure hole is connected with a high-pressure water pump, and the high-pressure water pump is communicated with an external water source; and a detection hole is formed in the upper steel plate disc surface between the grouting hole and the water pressure hole, a temperature sensor is arranged in the detection hole, and the temperature sensor is in signal connection with the data processing equipment.
As the utility model discloses a preferred technical scheme, go up the steel sheet and the steel sheet is the round steel plate that the size equals down.
Preferably, the number of the detection holes is 5-15, and the detection holes are respectively positioned on circular rings with different radiuses and taking the grouting holes as centers.
Preferably, the detecting holes are radially distributed in 2-4 rows along the radius direction, and the hole distance between adjacent detecting holes in the same row is 50-200 mm.
Preferably, a circle of bolts are arranged at intervals on the outer edges of the upper steel plate and the lower steel plate; and a plurality of bolts are arranged around the grouting holes at the center for connection.
Further preferably, the distance control member is a steel wire section, and the diameter of the steel wire section is adjusted according to the simulated fracture opening.
Further preferably, a pressure gauge is arranged between the water pressure hole and the high-pressure water pump to display the water head pressure.
More preferably, the distance between the water pressure hole and the grouting hole is 2/3-5/6 of the radius of the steel plate.
Further preferably, the drain hole is wrapped by geotextile to prevent the slurry from flowing out.
Further preferably, the sealing ring is a silica gel pad.
The working principle of the application is as follows: two steel plates are fixed by bolts, a plurality of sections of steel wires with different diameters and difficult to deform are arranged between the steel plates to simulate cracks with different sizes, a high-pressure water pump is used for connecting water pressure holes, stable high water head pressure is applied, a grouting pump is connected with a grouting hole, the mixed high-temperature cement slurry is pumped into the cracks of the steel plates by the grouting pressure higher than the water pressure, then the real-time temperature of each detection point in each direction is measured by a temperature sensor, real-time data is recorded by a computer data acquisition system, real-time diffusion radius data in each direction of reverse water flow or along water flow grouting can be obtained based on the temperature difference between the slurry and water, the data is sorted and analyzed, and the change rule of the diffusion radius along with the time can be obtained.
Compared with the prior art, the utility model has the advantages as follows:
(1) the high-precision real-time detection of the radius of the slurry diffusion is realized; compare in current patent, adopt the diffusion radius method of measuring pressure variation in order to obtain the thick liquid, the utility model discloses utilize the temperature difference of thick liquid and water, adopt temperature sensor to survey the real-time temperature of inspection hole thick liquid, collect the real-time temperature data of each inspection hole simultaneously through computer data acquisition system, to the real-time diffusion radius that data arrangement analysis can obtain each direction thick liquid, pressure factor is not considered to this method, and the precision is higher.
(2) Simulating the diffusion rule of the slurry under different water flow states; under the condition of flowing water, fracture grouting has two working conditions of slurry forward flow diffusion and reverse flow diffusion, and the diffusion laws of the slurry and the reverse flow diffusion are different. The utility model discloses a method is applyed to different high water pressure, can simulate two kinds of different operating modes, obtains the thick liquid diffusion law of different operating modes. Compared with the existing patent, the simulation is more comprehensive and is closer to the actual engineering.
Drawings
Fig. 1 is a schematic system configuration diagram of a high-pressure slurry fracture grouting simulation device according to the present invention;
fig. 2 is a schematic side structure view of a high-pressure slurry fracture grouting simulation device according to the present invention;
fig. 3 is a schematic diagram of the detection result of the temperature data of the simulation experiment related to the present invention.
Reference numerals: 1-upper steel plate, 2-lower steel plate, 3-bolt, 4-distance control piece, 5-sealing ring, 6-grouting hole, 7-grouting pump, 8-water pressure hole, 9-high pressure water pump, 10-detection hole, 11-temperature sensor, 12-data processing equipment and 13-drainage hole.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Like fig. 1 and fig. 2, the utility model discloses can simulate each direction thick liquid slip casting diffusion distance and diffusion velocity of survey different aperture fractures under the high water pressure, can provide experimental basis for dam foundation slip casting during dam operation. In specific implementation, two flat steel plates with the thickness of 25mm and the diameter of 1200mm are respectively used as two walls of a simulated crack of the upper steel plate 1 and the lower steel plate 2, the steel plates are fixedly connected through a circle of bolts 3 to play a role in bearing pressure, and the centers of the steel plates are connected through three bolts 3, so that the problem of inaccurate crack size caused by lifting of the steel plates under high pressure is solved; the middle of the two steel plates is filled with non-deformable steel wires with different diameters to simulate cracks with different opening degrees, and a circle of silica gel pad is bonded around the steel plates to prevent water from overflowing; go up on steel sheet 1 except the bolt hole, one grouting hole 6 in addition, a water pressure hole 8 and a wash port 13, eight inspection holes 10, steel sheet diameter 1200mm, thickness 25mm, except that one inspection hole 10 that sets up between grouting hole 6 and water pressure hole 8, outside grouting hole 6 and the radius of water pressure hole 8 place, can lay a row of inspection hole 10 every 120 degrees, inspection hole 10 diameter is 13mm, the hole pitch of the adjacent inspection hole in the row is between 50-200mm, grouting hole 6 is located the steel sheet center department, water pressure hole 8 and wash port 13 are located grouting hole 6 both sides respectively, the collineatly sets of three, about 425mm apart from grouting hole 6, evenly lay the bolt hole on the circle that uses grouting hole 6 as the center, radius 560 mm. The grouting hole 6 is used for being connected with a grouting pump 7 for grouting, the water pressure hole 8 is connected with a high-pressure water pump 9 for applying high water pressure, and the detection hole 10 is used for being connected with a temperature sensor for measuring real-time temperature data of slurry flowing through the detection hole; the data processing device 12 is used to collect real-time temperature changes at the location of the sensing holes in each direction to determine the real-time diffusion radius of the slurry in each direction.
During specific implementation, cement slurry with a certain water cement ratio is mixed by water with the water temperature of 70 ℃, a water pressure hole 8 is simultaneously connected with a high-pressure water pump 9, high water pressure is applied, after the water pressure is stable, a grouting pump 7 is connected with a grouting hole 6, the mixed cement slurry with the temperature of 70 ℃ is pumped into a steel plate crack by the grouting pressure higher than the water pressure, the steel plate is divided into two parts by a vertical bisector of a connecting line of the water pressure hole 8 and the grouting hole 6, the steel plate on the side of the water pressure hole 8 is subjected to reverse flow grouting, the steel plate on the other side is subjected to forward flow grouting, real-time temperature data of each detection hole 10 in each direction is recorded by a computer data acquisition device, and real-time diffusion radiuses of the cracks in the forward flow direction and the reverse flow grouting in the high water pressure can be simultaneously obtained on the basis of the temperature.
In the utility model, the upper steel plate 1 and the lower steel plate 2 are pressure-bearing devices and are fixed by a circle of bolts 3; a plurality of sections of steel wires with different diameters are plugged between the steel plates to be used as distance control pieces 4 to simulate cracks with different sizes, and a circle of silica gel pads are used for preventing water from overflowing around the steel plates; the grouting hole 6 is used for connecting a grouting pump 7 for grouting; the water pressure hole 8 is used for connecting a high-pressure water pump 9 and is used for providing high water head pressure; the detection hole 10 is used for being connected with a temperature sensor 11 and measuring real-time temperature data of slurry flowing through the detection hole; the data processing device 12 is used to collect real-time temperature changes at the location of the sensing holes in each direction to determine the real-time diffusion radius of the slurry in each direction. The utility model discloses the precision of slip casting time can reach 0.1s, can simulate the thick liquid diffusion law under the different rivers flow states.
Fig. 3 is a set of experimental data collected by the data processing device 12 (computer), the abscissa is grouting time(s), the ordinate is temperature/100 (deg.c), and the temperature change time of different detection holes, i.e., the time for the grout to diffuse to different detection holes can be obtained from the graph, so that the real-time diffusion radius of the grouting grout in each direction can be obtained, and the purpose of the experiment can be achieved.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.
Claims (10)
1. The utility model provides a thick liquid crack slip casting analogue means under high water pressure which characterized in that:
the steel plate comprises an upper steel plate (1) and a lower steel plate (2), which are arranged up and down correspondingly and connected through bolts (3), a distance control piece (4) is arranged in a middle crack, and a sealing ring (5) is arranged around the crack;
the center of the upper steel plate (1) is provided with a grouting hole (6), the grouting hole (6) is connected with a grouting pump (7), and the grouting pump (7) is communicated with a high-temperature grouting system;
a water pressure hole (8) and a water drain hole (13) are respectively arranged on two sides of the grouting hole (6) at equal intervals, the water pressure hole (8) is connected with a high-pressure water pump (9), and the high-pressure water pump (9) is communicated with an external water source;
on the upper steel plate (1) disc surface between the grouting hole (6) and the water pressure hole (8), detection holes (10) are dispersedly arranged, temperature sensors (11) are arranged in the detection holes (10), and the temperature sensors (11) are in signal connection with data processing equipment (12).
2. The grouting simulation device for the slurry crack under the high water pressure as claimed in claim 1, wherein: the upper steel plate (1) and the lower steel plate (2) are round steel plates with equal size.
3. The grouting simulation device for the slurry crack under the high water pressure as claimed in claim 2, wherein: the number of the detection holes (10) is 5-15, and the detection holes are respectively positioned on circular rings with different radiuses and taking the grouting holes (6) as centers.
4. The grouting simulation device for the slurry crack under the high water pressure as claimed in claim 3, wherein: the detection holes (10) are radially distributed in 2-4 rows along the radius direction, and the pitch between adjacent detection holes (10) in the same row is 50-200 mm.
5. The grouting simulation device for the slurry crack under the high water pressure as claimed in claim 2, wherein: a circle of bolts (3) are arranged at intervals on the outer edges of the upper steel plate (1) and the lower steel plate (2); the center position is provided with a plurality of bolts (3) around the grouting hole (6) for connection.
6. The grouting simulation device for the slurry crack under the high water pressure as claimed in claim 1, wherein: the distance control piece (4) is a steel wire section, and the diameter of the steel wire section is adjusted according to the simulated crack opening.
7. The grouting simulation device for the slurry crack under the high water pressure as claimed in claim 1, wherein: and a pressure gauge for controlling water pressure is arranged on a water pipe between the water pressure hole (8) and the high-pressure water pump (9).
8. The grouting simulation device for the slurry crack under the high water pressure as claimed in claim 1, wherein: the distance between the water pressure hole (8) and the grouting hole (6) is 2/3-5/6 of the radius of the steel plate.
9. The grouting simulation device for the slurry crack under the high water pressure as claimed in claim 1, wherein: the drain hole (13) is wrapped by geotextile.
10. The grouting simulation device for the slurry crack under the high water pressure as claimed in claim 1, wherein: the sealing ring (5) is a silica gel pad.
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| CN202020874520.6U CN212432897U (en) | 2020-05-22 | 2020-05-22 | Slurry crack grouting simulation device under high water pressure |
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| CN202020874520.6U CN212432897U (en) | 2020-05-22 | 2020-05-22 | Slurry crack grouting simulation device under high water pressure |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113049452A (en) * | 2021-04-15 | 2021-06-29 | 中国水利水电科学研究院 | Device and method for measuring and controlling diffusion range of cement-based grout in grouting of covering layer |
| CN113588402A (en) * | 2021-06-21 | 2021-11-02 | 中国石油大学(华东) | Experimental device for ultrasonic testing shale hydration microcrack propagation characteristic of high temperature and high pressure water circulation |
| CN114778384A (en) * | 2022-03-15 | 2022-07-22 | 北京中煤矿山工程有限公司 | Deep high-water-pressure double-crack grouting simulation test device |
| CN117825233A (en) * | 2023-12-11 | 2024-04-05 | 山东大学 | High-temperature water-rich filling crack grouting simulation test system and method |
-
2020
- 2020-05-22 CN CN202020874520.6U patent/CN212432897U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113049452A (en) * | 2021-04-15 | 2021-06-29 | 中国水利水电科学研究院 | Device and method for measuring and controlling diffusion range of cement-based grout in grouting of covering layer |
| CN113049452B (en) * | 2021-04-15 | 2021-10-26 | 中国水利水电科学研究院 | Device and method for measuring and controlling diffusion range of cement-based grout in grouting of covering layer |
| CN113588402A (en) * | 2021-06-21 | 2021-11-02 | 中国石油大学(华东) | Experimental device for ultrasonic testing shale hydration microcrack propagation characteristic of high temperature and high pressure water circulation |
| CN113588402B (en) * | 2021-06-21 | 2023-12-26 | 中国石油大学(华东) | Ultrasonic wave detects hydrologic cycle effect shale hydration microcrack extension experimental apparatus |
| CN114778384A (en) * | 2022-03-15 | 2022-07-22 | 北京中煤矿山工程有限公司 | Deep high-water-pressure double-crack grouting simulation test device |
| CN117825233A (en) * | 2023-12-11 | 2024-04-05 | 山东大学 | High-temperature water-rich filling crack grouting simulation test system and method |
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