CN111999215A - Slurry consolidation state detection equipment and detection method - Google Patents
Slurry consolidation state detection equipment and detection method Download PDFInfo
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- CN111999215A CN111999215A CN202010930947.8A CN202010930947A CN111999215A CN 111999215 A CN111999215 A CN 111999215A CN 202010930947 A CN202010930947 A CN 202010930947A CN 111999215 A CN111999215 A CN 111999215A
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- 239000002002 slurry Substances 0.000 title claims abstract description 127
- 238000007596 consolidation process Methods 0.000 title claims abstract description 67
- 238000001514 detection method Methods 0.000 title claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 135
- 239000000463 material Substances 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims description 23
- 230000008859 change Effects 0.000 claims description 21
- 239000004575 stone Substances 0.000 claims description 16
- 238000012545 processing Methods 0.000 claims description 14
- 238000004891 communication Methods 0.000 claims description 8
- 238000001764 infiltration Methods 0.000 claims description 7
- 230000008595 infiltration Effects 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 5
- 239000012466 permeate Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 description 16
- 238000002474 experimental method Methods 0.000 description 11
- 238000005259 measurement Methods 0.000 description 10
- 230000001105 regulatory effect Effects 0.000 description 10
- 239000011440 grout Substances 0.000 description 8
- 239000004568 cement Substances 0.000 description 4
- 238000005065 mining Methods 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000008093 supporting effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000011268 mixed slurry Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention provides a slurry consolidation state detection device and a detection method, belonging to the technical field of geological grouting and comprising an outer cylinder, an inner cylinder and a consolidation detector, wherein the outer cylinder is connected with a water pump, and the bottom of the outer cylinder is provided with a water discharge opening; the inner cylinder is arranged in the inner cavity of the outer cylinder, a first cavity for containing water is formed between the inner cylinder and the outer cylinder and is communicated with the water pump, a second cavity for containing slurry is arranged in the inner cylinder, a water seepage material for the slurry to seep into the first cavity is arranged on the side wall of the inner cylinder, and a high-pressure grouting pump is communicated with the second cavity; the consolidation detector is used for emitting longitudinal waves into the second cavity and measuring the propagation speed of the longitudinal waves in the slurry, so that the consolidation state of the slurry is obtained. The slurry consolidation state detection device and the slurry consolidation state detection method provided by the invention can simulate the water seepage condition of slurry under high pressure in the field working condition, improve the accuracy and reduce the labor intensity.
Description
Technical Field
The invention belongs to the technical field of geological grouting, and particularly relates to a slurry consolidation state detection device and a slurry consolidation state detection method.
Background
The geological grouting technology is a method for injecting slurry with different proportions into a geologic body under high pressure, repairing the damaged geologic body and reducing the permeability of an aquifer, can effectively solve the contradiction between the regional underground water environment and the safe mining of ore deposit resources, and is more and more widely applied.
Along with the increase of the demand of China on mineral resources and the continuous increase of mining intensity, a series of problems of environment, water resource protection, safety and the like caused by drainage in the mining process of mines are increasingly highlighted. The mine curtain grouting technology can effectively solve the contradiction between the underground water environment of a protected area and the safe mining of mineral resources, the application of the mine curtain grouting technology is more and more extensive, in order to test the initial setting time of slurry, a normal-pressure non-drainage test is usually adopted, a vicat instrument is required to be manually adopted to measure the viscosity of the slurry once an hour in the test process, the initial setting time of the slurry is finally obtained by recording the measured data each time, the process has large manual workload and complex data processing process; and the initial setting time measured by the normal-pressure non-drainage test is different from the field working condition, and the measured initial setting time of the slurry can not accurately reflect the initial setting time of the slurry in the field working condition.
Disclosure of Invention
The invention aims to provide a slurry consolidation state detection device and a detection method, and aims to solve the technical problems that the workload is large and the slurry initial setting time is in and out of the field working condition in the conventional normal-pressure drainage-free slurry initial setting time measurement.
In order to achieve the purpose, the invention adopts the technical scheme that: provided is a slurry consolidation state detection apparatus including:
the water pump is connected to the outer barrel, and a water draining opening is formed in the bottom of the outer barrel;
the inner cylinder is arranged in the inner cavity of the outer cylinder, a first cavity for containing water is formed between the inner cylinder and the outer cylinder, the first cavity is communicated with the water pump, a second cavity for containing slurry is arranged in the inner cylinder, a water seepage material for the slurry to seep into the first cavity is arranged on the side wall of the inner cylinder, and the second cavity is communicated with a high-pressure grouting pump; and
and the consolidation detector is used for transmitting longitudinal waves into the second cavity and measuring the propagation speed of the longitudinal waves in the slurry, so that the consolidation state of the slurry is obtained.
As another embodiment of the present application, the consolidation detector comprises:
the emitter is arranged on the inner wall of the inner barrel;
the receiver is arranged on the inner wall of the inner barrel and corresponds to the emitter, and the maximum distance between the emitter and the receiver is equal to the inner diameter of the second cavity; and
and the processing module is respectively in communication connection with the transmitter and the receiver and is used for calculating the wave velocity of the longitudinal wave and making a time-wave velocity change curve.
As another embodiment of the present application, a bracket is disposed in the outer cylinder, and the bracket is used for fixing the inner cylinder.
As another embodiment of the present application, the water permeable material is a water permeable stone, the water permeable stone is laid on the inner wall of the inner cylinder, and the water permeable stone encloses to form the second cavity; the lateral wall of inner tube is equipped with the bar hole, the major axis in bar hole with the axis of inner tube is parallel, the bar hole is used for making the thick liquid permeate through the water that the infiltration stone flows out passes through.
As another embodiment of the application, a grouting pipe is inserted into the top of the outer cylinder, one end of the grouting pipe is communicated with the high-pressure grouting pump, the other end of the grouting pipe extends to the second cavity, a slurry pressure sensor is connected onto the grouting pipe, and a water pressure sensor is arranged at the top of the outer cylinder.
As another embodiment of the present application, a drain pipe is connected to the drain opening, and an adjusting valve for adjusting a flow rate of the drain water is disposed on the drain pipe.
As another embodiment of the present application, the water pressure sensor is in communication with the regulating valve.
As another embodiment of the application, the top end and the bottom end of the inner cylinder are both provided with a sealing ring.
The slurry consolidation state detection equipment provided by the invention has the beneficial effects that: compared with the prior art, the slurry consolidation state detection equipment has the use process that: filling the first cavity with water, then filling the second cavity with slurry, under the condition that the first cavity and the second cavity are both filled, the first cavity is filled with water through the water pump to pressurize the first cavity to a first preset value, injecting slurry into the second cavity through a high-pressure grouting pump to pressurize the second cavity to a second preset value, and the first preset value and the second preset value are ensured to be constant, the slurry begins to seep water to the first cavity through the water seepage material, at the moment, the consolidation detector is started, which transmits longitudinal waves at the same time interval and measures the speed of the longitudinal waves through the slurry, and in the process of water seepage of the slurry, and (3) increasing the pressure in the first cavity, discharging redundant water through the water discharge opening to ensure that the water pressure is constant at a first preset value until the measurement is finished, observing the speed of longitudinal waves measured at each time point, and taking a period of time with the fastest wave speed change rate as the initial setting time of the slurry. The slurry consolidation state detection equipment can simulate the water seepage condition of slurry under high pressure in field working conditions, can respectively adjust the water pressure and the grouting pressure through the water pressure pump and the high-pressure grouting pump for different working condition environments, and can also replace water seepage materials made of different materials, so that the water seepage coefficient of the water seepage materials is close to that of the field working conditions, and the accuracy of the initial setting time of the measured slurry is ensured; the initial setting time of the slurry is measured through the propagation velocity of the longitudinal wave, manual detection is not needed, the initial setting time can be directly obtained by directly observing the measurement data, the accuracy is improved, and the labor intensity is reduced.
The invention also provides a slurry consolidation state detection method which is realized based on the slurry consolidation state detection equipment and comprises the following steps:
s1: filling water into the first cavity and filling slurry into the second cavity;
s2: continuously injecting water into the first cavity by a water pressure pump for pressurizing and keeping the pressure constant at P2Continuously grouting and pressurizing the interior of the second cavity by a high-pressure grouting pump and keeping the pressure constant at P1；
S3: and transmitting multiple longitudinal waves into the second cavity through the consolidation detector, measuring the propagation speed of each longitudinal wave, and taking the interval with the highest velocity change rate of the longitudinal waves, wherein the interval is the initial setting time of the slurry.
As another embodiment of the present application, the step S3 specifically includes:
s31: the consolidation detector emits longitudinal waves at the same time interval for a plurality of times, and the path of the longitudinal waves traverses the slurry;
s32: recording the speed of each longitudinal wave passing through the slurry, and preparing a time-speed change curve according to each record;
s33: and observing the interval with the highest change rate of the longitudinal wave speed in the curve, wherein the interval is the initial setting time of the slurry.
The slurry consolidation state detection method provided by the invention has the beneficial effects that: compared with the prior art, the slurry consolidation state detection method can simulate different working condition environments by changing water pressure, grouting pressure and water seepage coefficient of a water seepage material, and ensures the real accuracy of measurement; the longitudinal wave transmitted by the consolidation detector can accurately measure the wave velocity, and the wave velocity directly reflects the state of the slurry, so that the initial setting time of the slurry can be directly obtained by observing the measured wave velocity and the change rate of the observed wave velocity, the calculation by manpower is not needed, certain experimental error is reduced, and the operation is convenient.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic cross-sectional structural diagram of a slurry consolidation state detection apparatus according to an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of the portion C in FIG. 1;
FIG. 3 is a schematic cross-sectional view of an inner barrel taken along line A-A of FIG. 1 in accordance with an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view taken along line B-B of FIG. 1;
FIG. 5 is a schematic front view of an inner barrel according to an embodiment of the present invention;
FIG. 6 is a schematic front view of an inner barrel according to a second embodiment of the present invention;
FIG. 7 is a block diagram of a processing module according to an embodiment of the present invention;
FIG. 8 is a graph showing the results of the first experiment;
FIG. 9 is a graph showing the results of the second experiment.
In the figure: 1. an outer cylinder; 2. an inner barrel; 3. a consolidation detector; 301. a transmitter; 302. a receiver; 303. a processing module; 4. a water pressure pump; 5. a water discharge opening; 6. a water permeable material; 7. a high-pressure grouting pump; 8. a support; 801. a bearing ring; 802. a strut; 9. a strip-shaped hole; 10. a grouting pipe; 11. a slurry pressure sensor; 12. a water pressure sensor; 13. a drain pipe; 14. adjusting a valve; 15. a seal ring; 16. a first cavity; 17. a second cavity.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 and fig. 7, the apparatus for detecting the slurry consolidation state provided by the present invention will now be described. The slurry consolidation state detection device comprises an outer cylinder 1, an inner cylinder 2 and a consolidation detector 3, wherein the outer cylinder 1 is connected with a water pressing pump 4, and the bottom of the outer cylinder 1 is provided with a water drainage opening 5; the inner cylinder 2 is arranged in the inner cavity of the outer cylinder 1, a first cavity 16 for containing water is formed between the inner cylinder 2 and the outer cylinder, the first cavity 16 is communicated with the water pump 4, a second cavity 17 for containing slurry is arranged in the inner cylinder 2, the side wall of the inner cylinder 2 is provided with a water seepage material 6 for the slurry to seep into the first cavity 16, and the second cavity 17 is communicated with a high-pressure grouting pump 7; the consolidation detector 3 is used for emitting longitudinal waves into the second cavity and measuring the propagation speed of the longitudinal waves in the slurry, so as to obtain the consolidation state of the slurry.
The application process of the slurry consolidation state detection equipment comprises the following steps: filling water into the first cavity 16, then filling the second cavity 17 with slurry, under the condition that the first cavity 16 and the second cavity 17 are both full, filling water into the first cavity 16 by the water pressure pump 4 to pressurize the first cavity 16 to a first preset value, filling slurry into the second cavity 17 by the high-pressure grouting pump 7 to pressurize the second cavity 17 to a second preset value, ensuring the first preset value and the second preset value to be constant, starting the slurry to seep water into the first cavity 16 by the water permeable material 6, starting the consolidation detector 3 to emit longitudinal waves at the same time interval, measuring the speed of the longitudinal waves passing through the slurry, increasing the pressure in the first cavity 16 in the process of seepage of the slurry, discharging excessive water through the water outlet 5 to ensure that the water pressure is constant at the first preset value, observing the speed of the longitudinal waves measured at each time point until the measurement is finished, and taking a period of time with the fastest wave speed change rate as the initial setting time of the slurry.
Compared with the prior art, the slurry consolidation state detection equipment can simulate the water seepage condition of slurry under high pressure in field working conditions, can respectively adjust the water pressure and the grouting pressure through the water pressure pump 4 and the high-pressure grouting pump 7 for different working condition environments, and can replace water seepage materials 6 made of different materials, so that the water seepage coefficient of the water seepage materials 6 is close to the experimental condition and the field working conditions, and the accuracy of the measured initial setting time of the slurry is ensured; the initial setting time of the slurry is measured through the propagation velocity of the longitudinal wave, manual detection is not needed, the initial setting time can be directly obtained by directly observing the measurement data, the accuracy is improved, and the labor intensity is reduced.
It is worth to be noted that the change rate of the wave speed can reflect the state of the slurry, when the slurry has strong fluidity, the wave speed is slow and the change rate is slow, when the slurry starts to solidify, the wave speed gradually rises and the change rate is fastest, and when the slurry is close to complete solidification, the wave speed is fast and the change rate is slow.
As an embodiment of the slurry consolidation state detection apparatus provided by the present invention, please refer to fig. 1 to 2 and 7, the consolidation detector 3 includes an emitter 301, a receiver 302, and a processing module 303, the emitter 301 is disposed on the inner wall of the inner cylinder 2; the receiver 302 is arranged on the inner wall of the inner barrel 2 and corresponds to the emitter 301, and the maximum distance between the emitter 301 and the receiver 302 is equal to the inner diameter of the second cavity 17; the processing module 303 is in communication connection with the transmitter 301 and the receiver 302, respectively, and is configured to calculate a wave velocity of the longitudinal wave and generate a time-wave velocity variation curve.
Preferably, the longitudinal wave is transmitted every five minutes, the distance traveled by the longitudinal wave is just equal to the inner diameter of the second cavity 17, so that the longitudinal wave completely passes through each part of the grout (if the longitudinal wave only passes through the outer layer part of the grout, the outer layer of the grout is firstly soaked with water and solidified more quickly, but the inner layer possibly does not start to be solidified, so that errors exist in measured data and actual measured data), timing is started when the transmitter 301 sends the longitudinal wave, timing is stopped when the receiver 302 receives the longitudinal wave, the time of the longitudinal wave within the distance of the inner diameter of the second cavity 17 is obtained, the time of the longitudinal wave traveling through the inner diameter of the inner cylinder 2 is obtained by dividing the time length traveled by the wave speed, the processing module 303 counts the secondary wave speed, the wave speed is directly reflected for 5min, the above processes are circulated, the processing module 303 sequentially records the wave speeds of 10min and 15min …, a time-wave speed curve is prepared, grouting is stopped when the observed wave speed is highest and the change rate, and (5) after the experiment is finished, observing the duration with the fastest wave speed change rate, namely the initial setting time of the slurry.
The wave velocity of the longitudinal wave can be automatically calculated through the processing module 303, a table is made for manual observation, the initial setting time of the slurry under the corresponding experiment condition can be obtained only by manually remembering the experiment condition (including water pressure, grouting pressure and permeability coefficient), the measurement is accurate, the time interval can be adjusted as required, various experiment requirements can be met by adjusting single or multiple variables, final data only need to be recorded manually, and the labor intensity is reduced without the need of in-person measurement.
Referring to fig. 1 and 4, as an embodiment of the apparatus for detecting a slurry consolidation state provided by the present invention, a bracket 8 is disposed in the outer cylinder 1, and the bracket 8 is used for fixing the inner cylinder 2. Preferably, the bracket 8 can be installed in the outer cylinder 1 first, and then the inner cylinder 2 is directly placed on the bracket 8; or the bracket 8 is fixed with the bottom of the inner cylinder 2 first, and then the bracket 8 is fixed in the outer cylinder 1;
can conveniently fix and adjust the position between inner tube 2 and urceolus 1 through support 8, thereby realize the altitude mixture control of inner tube 2 through support 8 at the 1 internally mounted's of urceolus height, be in the degree of depth in the urceolus 1 and then adjust the water pressure of inner tube 2 periphery according to inner tube 2, satisfy the experiment demand of different situation.
Specifically, the bracket 8 comprises a bearing ring 801 and a supporting rod 802, the bearing ring 801 is used for bearing or fixing at the bottom of the inner cylinder 2, one end of the supporting rod 802 is fixedly connected with the bearing ring 801, and the other end is fixedly connected with the inner wall of the outer cylinder 1; the plurality of struts 802 is provided, and the plurality of struts 802 is radially distributed around the axis of the support ring 801. This structure can play the supporting effect to inner tube 2 to the clearance between the adjacent branch 802 can supply water to pass through, does not influence experimental going on.
As an embodiment of the slurry consolidation state detection apparatus provided by the present invention, please refer to fig. 1 to 3 and fig. 6 to 7, the water permeable material 6 is a water permeable stone, the water permeable stone is laid on the inner wall of the inner cylinder 2, and the water permeable stone encloses to form a second cavity 17; the lateral wall of inner tube 2 is equipped with strip hole 9, and the major axis of strip hole 9 is parallel with the axis of inner tube 2, and strip hole 9 is used for making the thick liquid permeate the water that the infiltration stone flows out and pass through. Preferably, the length of the inner cylinder 2 is 15cm, the length of the strip-shaped holes 9 is 2cm, the strip-shaped holes 9 are arranged in a plurality of the mode of winding the axis of the inner cylinder 2, the strip-shaped holes 9 at the same height form a combination, and the inner cylinder 2 is provided with a plurality of groups of the strip-shaped holes 9 from top to bottom; the length of the inner cylinder 2 can be 15cm, the length of the strip-shaped hole 9 can be 13cm, and a plurality of strip-shaped holes 9 are arranged around the axis of the inner cylinder 2. Get into the thick liquid in the second cavity 17 at the in-process of infiltration, water is earlier through the infiltration stone, then flows out from bar hole 9 and arrives first cavity 16 in, through two kinds of barriers in infiltration stone and bar hole 9, prevents the mud outflow when can guaranteeing the thick liquid infiltration, guarantees the accuracy of experimental result. In this embodiment, the emitter 301 and the receiver 302 of the consolidation detector 3 are provided on the permeable stone.
As another embodiment, the water-permeable stone can be filled in the strip-shaped holes 9, and the above effects can be achieved.
As a specific embodiment of the slurry consolidation state detection apparatus provided by the present invention, please refer to fig. 1, a grouting pipe 10 is inserted at the top of an outer cylinder 1, one end of the grouting pipe 10 is communicated with a high pressure grouting pump 7, the other end extends to a second cavity 17, a slurry pressure sensor 11 is connected to the grouting pipe 10, and a water pressure sensor 12 is arranged at the top of the outer cylinder 1. Preferably, sealing layers are arranged between the grouting pipe 10 and the inner cylinder 2 and between the grouting pipe 10 and the outer cylinder 1, and the sealing layers can prevent the outflow of the grout or the outflow of water and ensure the constancy of the water pressure and the grout pressure.
The pressure in the second cavity 17 can be measured by the slurry pressure sensor 11, the pressure in the first cavity 16 can be measured by the water pressure sensor 12, and readings on the slurry pressure sensor 11 and the water pressure sensor 12 are recorded before an experiment, so that an initial setting time parameter of corresponding slurry in the pressure environment is obtained; in the experiment process, the pressure of water in the first cavity 16 is increased due to the fact that the slurry continuously seeps outwards, so that the reading of the water pressure sensor 12 is increased, the water flow provided by the water pressure pump 4 can be adjusted through the reading of the water pressure sensor 12, and the reading of the water pressure sensor 12 is maintained at a constant value; accordingly, the pressure value of the grout in the second cavity 1 is changed correspondingly, and the grouting flow of the high-pressure grouting pump 7 can be adjusted through the grout pressure sensor 11, so that the indication value of the grout pressure sensor 11 is maintained at a constant value. The structure is convenient to guarantee the constancy of pressure according to the slurry pressure sensor 11 and the water pressure sensor 12, and the accuracy of experimental data is guaranteed.
Referring to fig. 1, a drain pipe 13 is connected to the drain opening 5, and an adjusting valve 14 for adjusting a flow rate of drain water is provided on the drain pipe 13. In the process of experiment, because the slurry in the second cavity 17 continuously seeps into the first cavity 16, the pressure of water in the first cavity 16 is increased, so that the reading of the water pressure sensor 12 is increased, at the moment, the water supply flow of the water pressure pump 4 does not need to be adjusted, the reading of the water pressure sensor 12 can be controlled by adjusting the size of the adjusting valve 14 on the water drain pipe 13, and the reading of the water pressure sensor 12 is maintained at a constant value; the structure is convenient to adjust the opening of the adjusting valve 14 according to the water pressure sensor 12, so that the amount of the discharged water and the outward seepage amount of the slurry are adjusted to be relatively balanced, the constant pressure is ensured, and the accuracy of experimental data is ensured.
Referring to fig. 1 and 7, a water pressure sensor 12 is connected to a regulating valve 14 in communication with the slurry consolidation state detection apparatus according to an embodiment of the present invention. In the process of experiment, because the thick liquid is constantly outwards seeped water, can lead to the pressure increase of the interior water of first cavity 16 to the registration of water pressure sensor 12 increases, because water pressure sensor 12 is connected with governing valve 14 communication, when the registration of water pressure sensor 12 exceeded the default, governing valve 14 opened and begins to sluiced, exceeded the size in default scope through the registration of water pressure sensor 12 and can also adjust the aperture of governing valve 14. For example: when the reading of the water pressure sensor 12 exceeds the preset value by 10%, the opening of the regulating valve 14 is smaller, and the drainage flow is smaller; when the reading of the water pressure sensor 12 exceeds the preset value by 25%, the opening of the regulating valve 14 is larger, and the drain flow is larger at the moment. The process does not need manual regulation on the regulating valve 14, the labor intensity is reduced, and the process accuracy of regulating the opening degree of the regulating valve 14 according to the indication of the water pressure sensor 12 is higher.
Specifically, the water pressure sensor 12 is in communication connection with the processing module 303, and the regulating valve 14 is connected with a motor in communication connection with the processing module 303. When the reading of the water pressure sensor 12 exceeds the preset value, the processing module 303 analyzes the range of the water pressure sensor 12 exceeding the preset value, after the analysis is finished, the motor is controlled to be started, the starting time of the motor is controlled according to the analyzed value exceeding the range, so that the opening degree of the regulating valve 14 is adjusted, and then the motor is stopped; when the reading of the water pressure sensor 12 is recovered to normal, the processing module 303 immediately controls the motor to start and close the regulating valve 14, and then the motor is stopped.
Referring to fig. 1 to 2, as an embodiment of the apparatus for detecting a slurry consolidation state provided by the present invention, a sealing ring 15 is disposed at both the top end and the bottom end of the inner cylinder 2. Preferably, the top cover and the bottom cover of the inner cylinder 2 can be detached, the sealing performance of the inner cylinder 2 can be improved through the top of the inner cylinder 2 and the sealing ring 15 at the bottom of the inner cylinder 2, the influence on data caused by slurry flowing out of the outer cylinder 1 is prevented, and therefore the accuracy of an experimental result is guaranteed.
The invention also provides a method for detecting the consolidation state of the slurry. Referring to fig. 1 to 9, the method for detecting the slurry consolidation state includes the following steps:
s1: filling the first cavity 16 with water and filling the second cavity 17 with slurry;
s2: continuously injecting water into the first cavity 16 by the water pressure pump 4 to pressurize and keep the pressure constant at P2Continuously grouting and pressurizing the interior of the second cavity 17 by a high-pressure grouting pump 7 and keeping the pressure constant at P1；
S3: and transmitting multiple longitudinal waves into the second cavity 17 through the consolidation detector 3, measuring the propagation speed of each longitudinal wave, and taking the interval with the highest velocity change rate of the longitudinal waves, wherein the interval is the initial setting time of the slurry.
Compared with the prior art, the slurry consolidation state detection method provided by the invention can simulate different working conditions by changing water pressure, grouting pressure and water seepage coefficient of the water seepage material 6, thereby ensuring the real accuracy of measurement; the longitudinal wave transmitted by the consolidation detector 3 can accurately measure the wave velocity, and the wave velocity directly reflects the state of the slurry, so that the initial setting time of the slurry can be directly obtained by observing the measured wave velocity and the change rate of the observed wave velocity, the calculation is not needed, certain experimental error is reduced, and the operation is convenient.
As a specific embodiment of the method for detecting a consolidation state of slurry provided by the present invention, step S3 specifically includes:
s31: the consolidation detector 3 sends out longitudinal waves for multiple times at the same time interval, and the path of the longitudinal waves traverses the slurry;
s32: recording the speed of each longitudinal wave passing through the slurry, and preparing a time-speed change curve according to each record;
s33: and observing the interval with the highest change rate of the longitudinal wave speed in the curve, wherein the interval is the initial setting time of the slurry.
The accuracy of the initial setting time can be adjusted and measured by adjusting the time interval between the longitudinal waves emitted by the consolidation detector 3; for example: the initial setting time finally measured by transmitting the longitudinal wave once every 5min and the initial setting time finally measured by transmitting the longitudinal wave once every 10min are obviously more accurate, and the time of the interval between the longitudinal waves can be adjusted according to the experimental requirements, so that the accurate initial setting time is obtained.
The following examples of the actual process of measurement:
example 1: the slurry type is modified clay cement mixed slurry, and the density of the clay-based slurry is 1.2g/cm3The cement addition amount is 250kg/m3The water-solid ratio is 1.55: 1. The slurry of the type is injected into the inner cylinder 2, and the outer cylinder 1 is injected with water, so that the grouting pressure P is ensured1Is 6MPa, water pressure P2The permeability coefficient is set to be 5cm/d (parameter of the water seepage material 6), a time-wave velocity curve graph shown in figure 8 is obtained, the sampling interval is 5min, and the initial setting time (initial setting is a process, corresponding to a certain period of time instead of a certain moment, and the initial setting in the context is the same as the situation) is 35-65 min, which is a period of time with the highest growth speed.
Example 2: the slurry type is cement single slurry, the water cement ratio is 0.6:1, and the density is 1.76g/cm3. The slurry of the type is injected into the inner cylinder 2, and the outer cylinder 1 is injected with water, so that the grouting pressure P is ensured1Is 2MPa, water pressure P2The permeability coefficient is set to be 2cm/d (parameter of the water seepage material 6) under 1MPa, a time-wave velocity curve graph shown in figure 9 is obtained, the sampling interval is 5min, and the initial setting time is a time interval with the highest growth speed and is 35-55 min.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. Slurry consolidation state check out test set characterized by, includes:
the water pump is connected to the outer barrel, and a water draining opening is formed in the bottom of the outer barrel;
the inner cylinder is arranged in the inner cavity of the outer cylinder, a first cavity for containing water is formed between the inner cylinder and the outer cylinder, the first cavity is communicated with the water pump, a second cavity for containing slurry is arranged in the inner cylinder, a water seepage material for the slurry to seep into the first cavity is arranged on the side wall of the inner cylinder, and the second cavity is communicated with a high-pressure grouting pump; and
and the consolidation detector is used for transmitting longitudinal waves into the second cavity and measuring the propagation speed of the longitudinal waves in the slurry, so that the consolidation state of the slurry is obtained.
2. The slurry consolidation state detection apparatus of claim 1, wherein the consolidation detector comprises:
the emitter is arranged on the inner wall of the inner barrel;
the receiver is arranged on the inner wall of the inner barrel and corresponds to the emitter, and the maximum distance between the emitter and the receiver is equal to the inner diameter of the second cavity; and
and the processing module is respectively in communication connection with the transmitter and the receiver and is used for calculating the wave velocity of the longitudinal wave and making a time-wave velocity change curve.
3. The apparatus for detecting a consolidation state of a slurry according to claim 1, wherein a bracket is provided in the outer cylinder, and the bracket is used for fixing the inner cylinder.
4. The apparatus for detecting the consolidation state of slurry according to claim 1, wherein the water-permeable material is a water-permeable stone, the water-permeable stone is laid on the inner wall of the inner cylinder, and the water-permeable stone encloses to form the second cavity; the lateral wall of inner tube is equipped with the bar hole, the major axis in bar hole with the axis of inner tube is parallel, the bar hole is used for making the thick liquid permeate through the water that the infiltration stone flows out passes through.
5. The apparatus for detecting the consolidation state of slurry according to claim 1, wherein a grouting pipe is inserted into the top of the outer cylinder, one end of the grouting pipe is communicated with the high-pressure grouting pump, the other end of the grouting pipe extends to the second cavity, a slurry pressure sensor is connected to the grouting pipe, and a water pressure sensor is arranged on the top of the outer cylinder.
6. The apparatus for detecting a consolidation state of a slurry according to claim 5, wherein a drain pipe is connected to the drain opening, and an adjusting valve for adjusting a flow rate of the drain is provided on the drain pipe.
7. The slurry consolidation state detection apparatus of claim 6, wherein the water pressure sensor is communicatively coupled to the regulator valve.
8. The apparatus for detecting a consolidation state of a slurry according to claim 1, wherein the inner cylinder has a sealing ring at both the top end and the bottom end.
9. The method for detecting the consolidation state of the slurry is characterized by comprising the following steps of:
s1: filling water into the first cavity and filling slurry into the second cavity;
s2: continuously injecting water into the first cavity by a water pressure pump for pressurizing and keeping the pressure constant at P2Continuously grouting and pressurizing the interior of the second cavity by a high-pressure grouting pump and keeping the pressure constant at P1；
S3: and transmitting multiple longitudinal waves into the second cavity through the consolidation detector, measuring the propagation speed of each longitudinal wave, and taking the interval with the highest velocity change rate of the longitudinal waves, wherein the interval is the initial setting time of the slurry.
10. The method for detecting a consolidation state of a slurry according to claim 9, wherein the step S3 specifically includes:
s31: the consolidation detector emits longitudinal waves at the same time interval for a plurality of times, and the path of the longitudinal waves traverses the slurry;
s32: recording the speed of each longitudinal wave passing through the slurry, and preparing a time-speed change curve according to each record;
s33: and observing the interval with the highest change rate of the longitudinal wave speed in the curve, wherein the interval is the initial setting time of the slurry.
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