CN115370419A - Visual test system and method considering rock fracture biological reinforcement-seepage-temperature coupling effect - Google Patents
Visual test system and method considering rock fracture biological reinforcement-seepage-temperature coupling effect Download PDFInfo
- Publication number
- CN115370419A CN115370419A CN202210917554.2A CN202210917554A CN115370419A CN 115370419 A CN115370419 A CN 115370419A CN 202210917554 A CN202210917554 A CN 202210917554A CN 115370419 A CN115370419 A CN 115370419A
- Authority
- CN
- China
- Prior art keywords
- seepage
- temperature
- micp
- grouting
- liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011435 rock Substances 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 36
- 230000000007 visual effect Effects 0.000 title claims abstract description 27
- 238000012360 testing method Methods 0.000 title claims abstract description 24
- 230000001808 coupling effect Effects 0.000 title claims abstract description 18
- 239000007788 liquid Substances 0.000 claims abstract description 86
- 239000002002 slurry Substances 0.000 claims abstract description 22
- 230000008569 process Effects 0.000 claims abstract description 21
- 238000012544 monitoring process Methods 0.000 claims abstract description 15
- 238000004064 recycling Methods 0.000 claims abstract description 4
- 238000010998 test method Methods 0.000 claims abstract description 4
- 101000965313 Legionella pneumophila subsp. pneumophila (strain Philadelphia 1 / ATCC 33152 / DSM 7513) Aconitate hydratase A Proteins 0.000 claims abstract 18
- 229910017053 inorganic salt Inorganic materials 0.000 claims description 41
- 239000012266 salt solution Substances 0.000 claims description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 32
- 239000004575 stone Substances 0.000 claims description 22
- 239000000243 solution Substances 0.000 claims description 20
- 239000000523 sample Substances 0.000 claims description 10
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 9
- 239000004202 carbamide Substances 0.000 claims description 9
- 230000001580 bacterial effect Effects 0.000 claims description 7
- 230000001276 controlling effect Effects 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 4
- 238000006460 hydrolysis reaction Methods 0.000 claims description 4
- 230000000737 periodic effect Effects 0.000 claims description 4
- 108010046334 Urease Proteins 0.000 claims description 3
- 230000007062 hydrolysis Effects 0.000 claims description 3
- 239000003973 paint Substances 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 abstract description 14
- 230000008901 benefit Effects 0.000 abstract description 6
- 230000002787 reinforcement Effects 0.000 abstract description 6
- 239000011440 grout Substances 0.000 abstract 1
- 230000000813 microbial effect Effects 0.000 abstract 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 description 4
- 239000001569 carbon dioxide Substances 0.000 description 4
- 239000004568 cement Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- -1 ammonium ions Chemical class 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000009919 sequestration Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/25—Greenhouse technology, e.g. cooling systems therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a visual test system and a visual test method considering the coupling effect of biological reinforcement-seepage-temperature of rock fractures, wherein the system comprises a slurry storage component, a dynamic monitoring component, a detachable seepage component, a temperature regulation and control component and a visual component; according to the method, the MICP grout is adopted to sequentially pass through the grouting pump and the grouting pipeline, so that the MICP grouting is realized to reinforce rock mass gaps; meanwhile, excessive MICP grouting liquid can flow back to the MICP storage container for recycling. In addition, the MICP slurry has small viscosity, the reinforcing and diffusing range is wider under low pressure, and the reinforcing effect on the rock mass fracture is better. The invention can consider the visual observation of rock mass seepage at different temperatures after the microbial reinforcement of the rock mass gap, can truly and completely observe the seepage process of the rock mass structural plane in the whole process and accurately depict the seepage state of the rock mass structural plane. And the reinforcing fracture data is fed back to the computer in real time by adopting the pressure sensor, and the computer adjusts the MICP grouting speed and pressure according to the feedback data, so that the maximization of economic benefit is realized.
Description
Technical Field
The invention relates to a characteristic research system and method considering the coupling effect of rock fracture biological reinforcement-seepage-temperature, belongs to the field of geotechnical engineering and environmental engineering, and particularly relates to a visual test system and method considering the coupling effect of rock fracture biological reinforcement-seepage-temperature.
Background
The cracks with different development degrees exist in the rock mass, which is an important reason causing rock mass infiltration and is always concerned by a plurality of experts and scholars of geotechnical engineering, and the cracks are easy to cause a series of engineering geological problems such as oil gas leakage, stratum landslide, water infiltration and the like. Therefore, the basic characteristics of rock fracture seepage need to be cleared firstly. The method has great significance for carbon dioxide geological storage, road restoration, slope treatment, mining and tunnel grouting reinforcement. Particularly for underground oil and gas development and sealing industries, huge carbon emission reduction pressure is inevitably brought about in the high-speed development of industrialization and urbanization, and Chinese carbon reduction measures will depend on carbon sealing technologies such as geological carbon storage more in the future. The difficult technology in geological carbon storage is that the opening of the rock body cracks causes carbon dioxide to be discharged to the nature again, so that a proper mode needs to be found for crack sealing. The cracks are usually blocked and blocked by adopting cement grouting materials, but the cement grouting materials have high viscosity, and the carbon dioxide blocking depth is generally below kilometer level in depth stratum, so that high-pressure grouting is needed, but soil body splitting and secondary damage are easily caused by the high-pressure grouting. The cement paste material is easy to cause strong alkaline environment and has great influence on the ecological environment. Therefore, a novel crack strengthening method is needed to meet the requirement of carbon sequestration.
As a novel reinforcing technology, the MICP grouting reinforcing technology is developed rapidly. Among them, the MICP reaction based on the urea hydrolysis reaction is widely spotlighted. By pouring bacterial suspension and cementing liquid (urea and CaCl) into the cracks of the rock mass 2 Solution) and urease secreted by bacteria hydrolyzes urea into ammonium ions and carbonate ions, and calcium carbonate is generated by combining calcium ions in pores, so that the aim of reinforcing cracks is fulfilled, and the permeability and porosity of rock mass can be fully reduced. In addition, the MICP grouting technology has the advantages of no disturbance to the surrounding environment, strong permeability, adjustable reaction rate and cementing strength, small environmental pollution and the like, and is widely applied to the fields of foundation treatment, sewage treatment, cultural relic restoration, wind prevention and sand control, dam seepage prevention and the like.
In addition, the carbon dioxide storage area is located in a stratum under the kilometer-level depth, the temperature characteristics of the stratum are different from the earth surface, and therefore the influence of temperature effect on seepage of rock fractures and reinforcing fractures by MICP is also required to be considered. However, no test sample device and method for researching MICP (micro computer aided process) reinforced rock mass cracks under the temperature action exist at present, and the existing rock mass seepage equipment cannot record the migration process of crack water in the rock mass cracks in real time. In addition, the MICP has wide reinforcing range and high reinforcing efficiency of the rock body fracture, but the existing equipment cannot acquire reinforcing fracture data, and grouting under constant flow or constant pressure is usually adopted and is not economical.
Disclosure of Invention
The invention aims to provide a visual test system and a visual test method considering the biological reinforcement-seepage-temperature coupling effect of rock fractures, and the system and the method are characterized in that: the method is simple to operate, has good crack reinforcing effect, can completely depict the seepage characteristics of the cracks before and after microorganism reinforcement, and can simulate the seepage states of the cracks of the rock at different temperatures. According to the invention, the MICP solution is poured into the rock mass to reinforce the rock mass crack, and the seepage characteristics of the inorganic salt solution in the rock mass before and after reinforcement are observed in real time through a high-speed camera, and in the process, the indoor rock mass temperature can be regulated and controlled in real time through the PC terminal at any stage; meanwhile, the grouting pressure can be acquired by a high-precision pressure sensor and a magnetic flowmeter and fed back to a computer, so that the speed and the pressure of liquid grouting can be regulated and controlled in real time, and the grouting efficiency and the grouting amount can be further improved; the invention can also recover the grouting liquid, thereby obtaining higher economic benefit.
The invention adopts the following technical scheme:
a visual test system considering the biological reinforcement-seepage-temperature coupling effect of rock fractures comprises a slurry storage assembly, a detachable seepage assembly, a temperature regulation and control assembly, a dynamic monitoring assembly and a visual assembly;
the slurry storage assembly comprises a MICP slurry storage container and an inorganic salt solution storage container, and the MICP slurry and the inorganic salt solution in the storage container are pumped into the detachable seepage assembly through a grouting conduit and a liquid pump;
the detachable seepage component comprises two transparent stone plates which are arranged in parallel and two liquid collecting boxes; a gap exists between the two transparent stone slabs to form a crack structural surface; the two liquid collecting boxes are respectively positioned at the front end and the rear end of the fracture structural surface; seepage holes and conduit holes are formed in the two ends of the liquid collecting box; one end of the liquid collecting box where the seepage holes are located is connected with the fracture structural surface; the inorganic salt solution and the MICP slurry respectively fill the fracture structural surface through a grouting guide pipe, a liquid pump and a liquid collecting box positioned at the front end, and the liquid can only seep in the horizontal direction; the liquid collecting box at the rear end is used for recycling liquid after the crack structural surface is filled; waterproof paint is coated on the periphery of the crack structure surface except for the part contacted with the liquid collecting box; wherein the refractive index of the inorganic salt solution is similar to or even the same as that of the transparent stone plate;
the temperature regulating and controlling component comprises a temperature regulator and a greenhouse cavity; the slurry storage component and the detachable seepage component are arranged in the cavity of the greenhouse; the temperature regulator is used for regulating and controlling the temperature in the greenhouse cavity;
the dynamic monitoring assembly comprises a PC end, a pressure sensor and a temperature probe; the pressure sensor is used for acquiring grouting pressure; the temperature probe is used for sensing and adjusting the room temperature in the cavity; the PC end acquires dynamic data of the pressure sensor and the temperature probe through a lead, and adjusts the grouting speed and pressure of the liquid pump according to the acquired data or adjusts the room temperature in the greenhouse cavity through the temperature controller, so as to keep the room temperature stable; the dynamic monitoring component except the PC end and the temperature regulator is positioned in the cavity greenhouse;
the visual observation assembly comprises a high-speed camera which is opposite to the fracture structural surface and is used for recording the seepage state and transmitting the seepage state to the PC end.
In the above technical solution, further, a front water stop clamp and a magnetic flowmeter are arranged on the grouting guide pipe, and are respectively used for controlling and monitoring whether the MICP solution and the inorganic salt solution can flow into the fracture structural surface and testing and monitoring the flow rate of the MICP solution and the inorganic salt solution flowing into the fracture structural surface; and a rear water stop clamp is arranged on the grouting guide pipe, and the MICP solution and the inorganic salt solution can be monitored and recovered through the rear water stop clamp.
Furthermore, the numerical value of the pressure sensor is controlled to be 1-500 kPa; the magnetic flow counting value is controlled to be 0-20 cm 3 And/s, transmitting the data measured by the magnetic flowmeter to the PC terminal.
Furthermore, a rigid connecting plate is arranged between the two transparent stone plates, and the transparent stone plates are fixedly connected with the rigid connecting plate through connecting bolt columns.
Further, the transparent stone plate is made of a transparent resin material.
Further, the MICP grouting liquid is: bacterial liquid, urea and CaCl with concentration of 0.5mol/L 2 Solution of the bacterial solution OD 600 Not less than 1.0, and urease activity not less than 2.0mM urea hydrolysis/min. The MICP slurry has low viscosity and low mutual adhesive force with resin materialsCompared with the traditional cement slurry material reinforcement, the reinforcing range of the MICP slurry is wider.
Furthermore, the temperature regulator adopts a phase periodic function form input, and the indoor temperature is kept stable through the given phase periodic function peak value.
The invention also provides a test method of the visual test system based on the consideration of the biological reinforcement-seepage-temperature coupling effect of the rock fracture, which comprises the following steps:
the method comprises the following steps that firstly, a liquid pump and a front water stop clamp on the inorganic salt solution side are opened, and the inorganic salt solution enters a crack structure surface formed by transparent stone plates through a magnetic flowmeter and a pressure sensor in sequence; in the process, the high-speed camera records the seepage state of the inorganic salt solution in the fracture structural plane all the time and transmits the recorded seepage process to the PC end, and the liquid pump and the front water stop clamp on the side of the inorganic salt solution are closed after the seepage is stable; finally, opening the back water stop clamp to recycle the inorganic salt solution;
secondly, opening a liquid pump and a front water stop clamp at the MICP grouting liquid side, and enabling the MICP grouting liquid to enter a crack structural surface formed by transparent stone plates after passing through a magnetic flowmeter and a pressure sensor in sequence; in the process, the high-speed camera records the seepage state of the MICP grouting liquid in the crack structural plane all the time and transmits the recorded seepage process to the PC end, and the liquid pump and the front water stop clamp on the MICP grouting liquid side are closed after the seepage is stable; finally, opening the rear water stop clamp to recover the MICP grouting liquid;
and thirdly, repeating the first step.
In the first step to the third step, the temperature of the indoor cavity is adjusted through the temperature regulator, and the rock mass seepage states under different temperatures can be further obtained.
The invention has the following advantages:
the test system and the method provided by the invention utilize the MICP grouting to reinforce the rock fracture, consider the wide range of the MICP grouting, and are more effective in reinforcing the rock fracture. In addition, the invention can consider the visual observation of the rock mass seepage at different temperatures after the microorganism consolidates the rock mass gap, can really and completely observe the seepage process of the rock mass structural plane in the whole process, and accurately depict the seepage state of the rock mass structural plane; the grouting speed and the grouting pressure in the fracture reinforcing process are dynamically adjusted by acquiring the data change of the pressure sensor in real time, so that the economic benefit is maximized. In addition, the device is detachable, so that the device is more convenient to use, and the economic benefit is remarkable.
Drawings
FIG. 1 is a flow chart of a full-scale visual observation operation;
FIG. 2 is a top view of the system;
FIG. 3 is a front view of the system;
FIG. 4 isbase:Sub>A schematic sectional view A-A;
FIG. 5 is a schematic cross-sectional view B-B;
FIG. 6 is a schematic cross-sectional view C-C;
FIG. 7 is a schematic view of section D-D;
FIG. 8 is a schematic cross-sectional view E-E;
FIG. 9 is a schematic diagram of the temperature variation curve of the temperature regulator 13;
wherein, 1MICP thick liquid storage container, 2 inorganic salt solution storage containers, 3 slip casting pipes, 4 liquid pumps, 5 transparent slates, 6 rigid connection boards, 7 connecting bolt columns, 8 waterproof coatings, 9PC ends, 10 wires, 11 pressure sensors, 12 temperature probes, 13 temperature regulators, 14 greenhouse cavities, 15 front water-stop clamps, 16 magnetic flowmeters, 17 seepage holes, 18 pipe holes, 19 liquid collection boxes, 20 rear water-stop clamps and 21 high-speed cameras.
Detailed Description
The technical solution of the present invention is further described below by using a specific example, but the example is only a specific implementation manner of the technical solution of the present invention, and does not limit the present invention.
A visual test system and method considering the biological reinforcement-seepage-temperature coupling effect of rock fractures comprises a MICP slurry storage container 1, an inorganic salt solution storage container 2, a grouting guide pipe 3, 2 liquid pumps 4, 2 transparent stone plates 5, 4 rigid connecting plates 6, 4 connecting bolt columns 7, a PC end 9, a plurality of leads 10, a pressure sensor 11, 2 temperature probes 12, a temperature controller 13, a greenhouse cavity 14, 2 front water stopping clamps 15, a magnetic flowmeter 16, 2 liquid collecting boxes 19, 2 rear water stopping clamps 20 and 2 high-speed cameras 21. The liquid collection tank 19 is provided with seepage holes 17 and conduit holes 18 at both ends.
The MICP slurry storage container 1 and the inorganic salt solution storage container 2 are filled with MICP slurry and inorganic salt solution which can be pumped into the detachable seepage assembly through a grouting conduit 3 and a liquid pump 4 respectively. A gap exists between the two transparent stone slabs 5 to form a crack structural surface; the two liquid collecting boxes 19 are respectively positioned at the front end and the rear end of the fracture structural surface; 4 rigid connecting plates 6 are arranged between the two transparent stone plates 5, and the transparent stone plates 5 are fixedly connected with the rigid connecting plates 6 through connecting bolt columns 7. Two ends of the liquid collecting box 19 are provided with seepage holes 17 and conduit holes 18; one end of the liquid collecting box 19 where the seepage hole 17 is located is connected with the crack structural surface; the periphery of the crack structure surface is coated with waterproof paint 8 except the part contacted with the liquid collecting box 19, thereby preventing liquid leakage. The temperature regulator 13 is used to regulate the temperature in the greenhouse cavity 14. The PC end 9 acquires dynamic data of the pressure sensor 11 and the temperature probe 12 through a lead 10, and adjusts the grouting speed and pressure of the liquid pump 4 according to the acquired data, or adjusts the room temperature in the greenhouse cavity 14 through the temperature controller 13, thereby keeping the room temperature stable. Except for the PC terminal 9 and the temperature regulator 13, the rest is positioned in the cavity greenhouse 14. The high-speed camera 21 is arranged on a crack structural surface and used for recording a seepage state and transmitting the seepage state to the PC end 9. The grouting guide pipe 3 is provided with a front water stop clamp 15 and a magnetic flowmeter 16 which are respectively used for controlling and monitoring whether the MICP solution and the inorganic salt solution can flow into the fracture structural surface or not and testing and monitoring the flow rate and the flow rate of the MICP solution and the inorganic salt solution flowing into the fracture structural surface; and a rear water stop clamp 20 is arranged on the grouting guide pipe 3, and the monitoring MICP solution and the inorganic salt solution can be recovered through the rear water stop clamp 20.
The method for testing by adopting the device comprises the following steps:
firstly, completely installing all equipment and materials according to the specification;
firstly, opening a liquid pump 4 and a front water stop clamp 15 on the inorganic salt solution side, and allowing the inorganic salt solution to enter a fracture structure surface formed by transparent stone plates 5 through a magnetic flowmeter 16 and a pressure sensor 11 in sequence; in the process, the high-speed camera 21 records the seepage state of the inorganic salt solution in the fracture structural plane and transmits the recorded seepage process to the PC end 9, and the liquid pump 4 and the front water stop clamp 15 on the side of the inorganic salt solution are closed after the seepage is stable; finally, the water stop clamp 20 is opened to recover the inorganic salt solution;
secondly, opening a liquid pump 4 and a front water stop clamp 15 at the MICP grouting liquid side, and enabling the MICP grouting liquid to enter a crack structural surface formed by transparent stone plates 5 after passing through a magnetic flowmeter 16 and a pressure sensor 11 in sequence; in the process, the high-speed camera 21 records the seepage state of the MICP grouting liquid in the crack structural plane all the time and transmits the recorded seepage process to the PC end 9, and the liquid pump 4 and the front water stop clamp 15 on the MICP grouting liquid side are closed after the seepage is stable; finally, opening the back water stop clamp 20 to recover the MICP grouting liquid;
and thirdly, repeating the first step.
Meanwhile, in any of the three steps, the temperature of the indoor cavity 14 can be adjusted through the temperature regulator 13, the temperature regulation curve is shown in figure 9, and the rock mass seepage state at different temperatures can be further obtained.
The specific process of seepage of the inorganic salt solution and the MICP grouting liquid in the fracture structural plane is as follows:
the inorganic salt solution or the MICP grouting liquid firstly enters a liquid collecting box 19 positioned at the front end of the transparent stone plate 5 through a guide pipe hole 18, then enters a crack structural surface through a seepage hole 17 at the other end of the liquid collecting box 19, and the liquid flows to the rear end from the front end of the crack structural surface and then enters a liquid collecting box 19 positioned at the rear end through a seepage hole 17 on the liquid collecting box 19 positioned at the rear end.
When the seepage is over, the rear water stop clip 20 is opened and the liquid in the liquid collection tank 19 at the rear end can be recovered through the pipe hole 18 into the inorganic salt solution storage container 2 and the MICP slurry storage container 1.
The main components of the slurry in the MICP grouting liquid storage tank 1 are bacteria liquid with certain activity: the MICP grouting liquid is: bacterial liquid, urea and CaCl with concentration of 0.5mol/L 2 Solution of the bacterial solution OD 600 Not less than 1.0, ureaseThe activity is more than or equal to 2.0mM urea hydrolysis/min.
The whole inorganic salt solution and the MICP grouting system can be disassembled, the size is small after the disassembly, the occupied transportation space is small, the on-site installation can be realized, and the construction is convenient.
When the seepage of inorganic salt solution and the reinforcement of the MICP grouting crack are observed, the collected data are fed back to the PC end 9 through the data acquisition pressure sensor 11 and the conducting wire 10, the PC end 9 adjusts the grouting speed and pressure and assigns the grouting pressure to the liquid pump 4, and the grouting is continuously carried out on the interior of the rock until the corresponding effect is achieved.
Claims (9)
1. A visual test system considering the biological reinforcement-seepage-temperature coupling effect of rock fractures is characterized by comprising a slurry storage assembly, a detachable seepage assembly, a temperature regulation and control assembly, a dynamic monitoring assembly and a visual assembly;
the slurry storage assembly comprises a MICP slurry storage container and an inorganic salt solution storage container, and the MICP slurry and the inorganic salt solution in the storage container are pumped into the detachable seepage assembly through a grouting conduit and a liquid pump;
the detachable seepage component comprises two transparent stone plates arranged in parallel and two liquid collecting boxes; a gap exists between the two transparent stone slabs to form a crack structural surface; the two liquid collecting boxes are respectively positioned at the front end and the rear end of the fracture structural surface; seepage holes and conduit holes are formed in the two ends of the liquid collecting box; one end of the liquid collecting box where the seepage holes are located is connected with the fracture structural surface; the inorganic salt solution and the MICP slurry respectively fill the fracture structural surface through a grouting guide pipe, a liquid pump and a liquid collecting box positioned at the front end, and the liquid can only seep in the horizontal direction; the liquid collecting box at the rear end is used for recycling liquid after the crack structural surface is filled; waterproof paint is coated on the periphery of the fracture structure surface except the part contacted with the liquid collecting box;
the temperature regulating and controlling component comprises a temperature regulator and a greenhouse cavity; the slurry storage component and the detachable seepage component are arranged in the cavity of the greenhouse; the temperature regulator is used for regulating and controlling the temperature in the greenhouse cavity;
the dynamic monitoring assembly comprises a PC end, a pressure sensor and a temperature probe; the pressure sensor is used for acquiring grouting pressure; the temperature probe is used for sensing and adjusting the room temperature in the cavity; the PC end acquires dynamic data of the pressure sensor and the temperature probe through a lead, and adjusts the grouting speed and pressure of the liquid pump according to the acquired data, or adjusts the room temperature in the greenhouse cavity through the temperature controller, so as to keep the room temperature stable; the dynamic monitoring component is provided with a PC end and a temperature regulator, and the rest components are positioned in the cavity greenhouse;
the visual observation assembly comprises a high-speed camera which is opposite to the fracture structural surface and is used for recording the seepage state and transmitting the seepage state to the PC end.
2. The visual test system considering the coupling effect of the biological reinforcement-seepage-temperature of the rock fracture as claimed in claim 1, wherein a front water stop clamp and a magnetic flowmeter are arranged on the grouting guide pipe and are respectively used for controlling and monitoring whether the MICP solution and the inorganic salt solution can flow into the fracture structural surface and testing and monitoring the flow rate and the flow rate of the MICP solution and the inorganic salt solution flowing into the fracture structural surface; and a rear water stop clamp is arranged on the grouting guide pipe, and the monitoring MICP solution and the inorganic salt solution can be recovered through the rear water stop clamp.
3. The visual testing system considering the coupling effect of the biological reinforcement-seepage-temperature of the rock fractures as claimed in claim 2, wherein the pressure sensor is controlled to be 1-500 kPa; the magnetic flow counting value is controlled to be 0-20 cm 3 And/s, transmitting the data measured by the magnetic flowmeter to the PC terminal.
4. The visual testing system for considering the coupling effect of the biological reinforcement-seepage-temperature of the rock fractures as claimed in claim 1, wherein a rigid connecting plate is arranged between the two transparent stone plates, and the transparent stone plates are fixedly connected with the rigid connecting plate through connecting bolt columns.
5. The visual testing system considering the coupling effect of the biological reinforcement-seepage-temperature of the rock fractures as claimed in claim 1, wherein said transparent stone plate is made of a transparent resin material.
6. The visual testing system considering the coupling effect of the biological reinforcement-seepage-temperature of the rock fractures as claimed in claim 1, wherein the MICP grouting liquid is: bacterial liquid, urea and CaCl with concentration of 0.5mol/L 2 Solution of the bacterial solution OD 600 Not less than 1.0, and urease activity not less than 2.0mM urea hydrolysis/min.
7. The visual testing system for considering the biological reinforcement-seepage-temperature coupling effect of the rock fractures as claimed in claim 1, wherein the temperature regulator is input in a phase periodic function form, and indoor temperature is kept stable through a given phase periodic function peak value.
8. A testing method of a visual testing system considering the biological consolidation-seepage-temperature coupling effect of rock fractures as claimed in any one of claims 1 to 7, characterized by the following steps:
the method comprises the following steps that firstly, a liquid pump and a front water stop clamp on the inorganic salt solution side are opened, and the inorganic salt solution enters a crack structure surface formed by transparent stone plates through a magnetic flowmeter and a pressure sensor in sequence; in the process, the high-speed camera records the seepage state of the inorganic salt solution in the fracture structural plane all the time and transmits the recorded seepage process to the PC end, and the liquid pump and the front water stop clamp on the side of the inorganic salt solution are closed after the seepage is stable; finally, opening the rear water stop clamp and recycling the inorganic salt solution;
secondly, opening a liquid pump and a front water stop clamp at the MICP grouting liquid side, and enabling the MICP grouting liquid to enter a crack structural surface formed by transparent stone plates after passing through a magnetic flowmeter and a pressure sensor in sequence; in the process, the high-speed camera records the seepage state of the MICP grouting liquid in the crack structural plane all the time and transmits the recorded seepage process to the PC end, and the liquid pump and the front water stop clamp on the MICP grouting liquid side are closed after the seepage is stable; finally, opening the rear water stop clamp to recover the MICP grouting liquid;
and thirdly, repeating the first step.
9. The test method of the visual test system considering the biological reinforcement-seepage-temperature coupling effect of the rock fractures as claimed in claim 8, wherein in the first step to the third step, the rock seepage states at different temperatures can be further obtained by adjusting the temperature of the indoor cavity through the temperature regulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210917554.2A CN115370419A (en) | 2022-08-01 | 2022-08-01 | Visual test system and method considering rock fracture biological reinforcement-seepage-temperature coupling effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210917554.2A CN115370419A (en) | 2022-08-01 | 2022-08-01 | Visual test system and method considering rock fracture biological reinforcement-seepage-temperature coupling effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115370419A true CN115370419A (en) | 2022-11-22 |
Family
ID=84063580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210917554.2A Pending CN115370419A (en) | 2022-08-01 | 2022-08-01 | Visual test system and method considering rock fracture biological reinforcement-seepage-temperature coupling effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115370419A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207215709U (en) * | 2017-02-28 | 2018-04-10 | 武汉大学 | Device for rock cranny three-phase flow displacement disperse capture research |
| CN109030291A (en) * | 2018-08-08 | 2018-12-18 | 成都理工大学 | Rock mass discontinuity three-dimensional network grouting test macro |
| WO2019033472A1 (en) * | 2017-08-16 | 2019-02-21 | 西南石油大学 | Multi-functional testing apparatus for multi-field coupled seepage |
| WO2019088925A1 (en) * | 2017-10-31 | 2019-05-09 | Nanyang Technological University | Bioslurry-induced water barrier and process of forming thereof |
| CN110907328A (en) * | 2019-11-29 | 2020-03-24 | 中国海洋石油集团有限公司 | Experimental device and method for plugging and seepage-proofing rock fractures based on MICP technology |
| CN111257538A (en) * | 2020-02-20 | 2020-06-09 | 武汉大学 | Fractured rock mass grouting simulation visualization test system and method considering stress effect |
| CN111735740A (en) * | 2020-07-22 | 2020-10-02 | 西安建筑科技大学 | Testing device and testing method for migration and diffusion of microbial solution in fracture-pore |
| CN111766190A (en) * | 2020-07-01 | 2020-10-13 | 中国科学院地质与地球物理研究所 | Visual test system for simulating grouting and seepage process of fractured rock mass |
| WO2021022465A1 (en) * | 2019-08-02 | 2021-02-11 | 山东科技大学 | Rough surface fissure generation method based on digital image technology, and experimental system |
| CN112903557A (en) * | 2021-01-20 | 2021-06-04 | 东南大学 | Visual measuring device and method for flow velocity and flow field in rock fracture seepage process |
| CN114002408A (en) * | 2021-10-18 | 2022-02-01 | 武汉科技大学 | Rock fracture seepage-temperature coupling visual test system and test method |
-
2022
- 2022-08-01 CN CN202210917554.2A patent/CN115370419A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207215709U (en) * | 2017-02-28 | 2018-04-10 | 武汉大学 | Device for rock cranny three-phase flow displacement disperse capture research |
| WO2019033472A1 (en) * | 2017-08-16 | 2019-02-21 | 西南石油大学 | Multi-functional testing apparatus for multi-field coupled seepage |
| WO2019088925A1 (en) * | 2017-10-31 | 2019-05-09 | Nanyang Technological University | Bioslurry-induced water barrier and process of forming thereof |
| CN109030291A (en) * | 2018-08-08 | 2018-12-18 | 成都理工大学 | Rock mass discontinuity three-dimensional network grouting test macro |
| WO2021022465A1 (en) * | 2019-08-02 | 2021-02-11 | 山东科技大学 | Rough surface fissure generation method based on digital image technology, and experimental system |
| CN110907328A (en) * | 2019-11-29 | 2020-03-24 | 中国海洋石油集团有限公司 | Experimental device and method for plugging and seepage-proofing rock fractures based on MICP technology |
| CN111257538A (en) * | 2020-02-20 | 2020-06-09 | 武汉大学 | Fractured rock mass grouting simulation visualization test system and method considering stress effect |
| CN111766190A (en) * | 2020-07-01 | 2020-10-13 | 中国科学院地质与地球物理研究所 | Visual test system for simulating grouting and seepage process of fractured rock mass |
| CN111735740A (en) * | 2020-07-22 | 2020-10-02 | 西安建筑科技大学 | Testing device and testing method for migration and diffusion of microbial solution in fracture-pore |
| CN112903557A (en) * | 2021-01-20 | 2021-06-04 | 东南大学 | Visual measuring device and method for flow velocity and flow field in rock fracture seepage process |
| CN114002408A (en) * | 2021-10-18 | 2022-02-01 | 武汉科技大学 | Rock fracture seepage-temperature coupling visual test system and test method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107389898B (en) | Visual simulation experiment device and method for consolidation grouting diffusion rule of flowing water quicksand stratum | |
| CN108195723B (en) | Permeation grouting test system and method for reinforcing loose gravel soil | |
| CN102707034B (en) | Indoor model testing device and testing method employing air-pressure splitting vacuum preloading method | |
| Cheng et al. | Modeling of permeation and fracturing grouting in sand: laboratory investigations | |
| CN212568764U (en) | Induced grouting experimental model for saturated fine sand layer | |
| CN110922110A (en) | Slurry wall for pollution site separation and pollution site separation control and treatment method | |
| CN109838113A (en) | Microorganism induction generates the method that calcium carbonate blocks Basement Crack | |
| CN106884424A (en) | A kind of device and construction method that microorganism solidification is carried out in thin silt | |
| CN105092798A (en) | Indoor recirculation system for simulating varying-head water-permeable soil layer phreatic water stratum and experimental method | |
| CN107796929A (en) | Elastic wave aids in cement ejection for water plugging model test apparatus | |
| CN109709308A (en) | One kind adopting water type ground fissure physical model test device and test method | |
| CN111175477A (en) | Saturated fine sand layer induced grouting experimental model and experimental method | |
| CN204925080U (en) | Simulation becomes indoor system of recharging in flood peak permeable ground dive stratum | |
| CN211122294U (en) | Model test device for researching soft clay thermal consolidation effect | |
| CN106480871A (en) | A kind of automatization's settlement monitoring device and method being suitable for Yu Haiyang land reclamation construction usage | |
| Wang et al. | Frost jacking of piles in seasonally and perennially frozen ground | |
| CN206906136U (en) | Consider the test device of artesian water effect Single Pile horizontal bearing characteristic | |
| CN115370419A (en) | Visual test system and method considering rock fracture biological reinforcement-seepage-temperature coupling effect | |
| CN107290260A (en) | The husky groove experimental rig of water circulation for artesian water flow model in porous media | |
| CN217561260U (en) | Grouting filling slurry diffusion distance simulation experiment device | |
| CN209384285U (en) | One kind closing on the existing bridge bearing platform protection construction of open-cut foundation ditch | |
| CN207866664U (en) | A kind of rock foundation grouting test device | |
| CN115110524B (en) | Reservoir bank slope hydro-fluctuation belt rock mass microorganism self-repairing anchor rod and method | |
| CN206220082U (en) | A kind of automation settlement monitoring device for being applicable Yu Haiyang land reclamation construction usage | |
| CN204041117U (en) | Multi-parameters real-time monitoring controller in a kind of mortar depositing construction process |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |