CN115165528A - Magnetic self-polymerization slurry pressure relief and water shutoff shear resistance testing method - Google Patents
Magnetic self-polymerization slurry pressure relief and water shutoff shear resistance testing method Download PDFInfo
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- 239000002002 slurry Substances 0.000 title claims abstract description 100
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- 238000012360 testing method Methods 0.000 title claims abstract description 35
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- 238000000034 method Methods 0.000 claims abstract description 24
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- 239000007788 liquid Substances 0.000 claims description 15
- 239000004568 cement Substances 0.000 claims description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- 238000011056 performance test Methods 0.000 claims description 8
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 7
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- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/24—Investigating strength properties of solid materials by application of mechanical stress by applying steady shearing forces
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0025—Shearing
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
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Abstract
The invention discloses a method for testing the pressure relief, water shutoff and shear resistance of magnetic self-polymerization slurry, which comprises the following steps: step 1): one end of a magnetic blocking rod with a certain magnetic force grade is adopted to adsorb magnetic self-aggregation slurry with a certain proportion, and then the water outlet end of the piezometric tube is blocked; step 2): opening a valve on the water inlet pipe and opening a pressure relief valve on the pressure relief pipe; step 3): gradually adjusting a pressure regulating valve, measuring the maximum water pressure which can be blocked after the magnetic blocking rod with the corresponding magnetic force grade absorbs the magnetic self-polymerization slurry with a certain proportion, and obtaining the numerical value of the amount of the decompressed water; and step 4): measuring the drawing force data of the corresponding magnetic blocking rod in the maximum water pressure state in the step 3); and step 5): replacing the magnetic blocking rod and the magnetic self-polymerization slurry, and repeating the steps 1) to 4) to obtain experimental data of water blocking and shearing resistance under the pressure relief state; the invention can obtain the plugging pressure of the magnetic self-polymerization slurry in a pressure relief state and the experimental data of the water plugging shearing resistance corresponding to different magnetic plugging rods and the magnetic self-polymerization slurry.
Description
Technical Field
The invention relates to the technical field of tunnels and underground engineering, in particular to a method for testing the pressure relief and water shutoff shear resistance of magnetic self-polymerization slurry.
Background
Along with the growth of national economy, the requirements of China on energy development and traffic construction are more and more increased, the manpower and capital components for putting into various tunnel projects are increased, along with the vigorous construction of underground projects in China, a large amount of geological disasters are often induced due to complex geological conditions in the underground projects such as tunnel construction, hydropower station construction, cross-basin water transfer construction, deep mines and the like, and the construction difficulty is large. The most serious karst gushing water is used, water in a karst pipeline generally presents a pressure state, the water quantity and the water pressure are large, the treatment difficulty is large, and large-flow and high-flow-rate karst pipeline type gushing water can be usually disclosed during engineering excavation. If the disaster is handled improperly, serious consequences can result. At present, when handling the phenomenon of gushing water, can adopt a brand-new magnetism to gather from thick liquid water shutoff technique, utilize novel magnetism to gather thick liquid, utilize magnetic field magnetization adsorption, carry out the shutoff to the position of gushing water, however this technique is still in the research stage, need test research different magnetic force grade magnetism to block up the performance parameter of stick absorption different ratios magnetism when gathering thick liquid shutoff outlet end, so that engineering practical application promotes, and when carrying out the water shutoff experiment, the report is not seen in the water shutoff experiment under the pressure release state, need research magnetism to gather the magnetism and gather the shutoff pressure of thick liquid under the pressure release state and the magnetism of different magnetic grade and the water shutoff shear capacity experimental data that the magnetism of gathering thick liquid corresponding with different ratios.
Disclosure of Invention
The invention aims to overcome the defects and provide a device and a method for testing the water shutoff and shear resistance of magnetic self-polymerization slurry, which are used for testing and researching performance parameters when magnetic plugging rods with different magnetic force grades adsorb water outlet ends of magnetic self-polymerization slurry with different proportions, and acquiring plugging pressure of the magnetic self-polymerization slurry in a pressure relief state and experimental data of water shutoff and shear resistance corresponding to the magnetic plugging rods with different magnetic grades and the magnetic self-polymerization slurry with different proportions, so that practical application and popularization of engineering are facilitated.
In order to solve the technical problems, the invention adopts the technical scheme that: a magnetic self-polymerization slurry pressure relief and water shutoff shear resistance test method comprises the following steps:
step 1): one end of a magnetic blocking rod with a certain magnetic force grade is adopted to adsorb magnetic self-aggregation slurry with a certain proportion, then the water outlet end of the pressure measuring pipe is blocked, and the other end of the magnetic blocking rod is fixedly connected with an annular tightening hoop fixedly arranged at the end part of the pressure measuring pipe through a drawing rod, so that the positions of the magnetic blocking rod and the adsorbed magnetic self-aggregation slurry are fixed;
step 2): opening a valve on the water inlet pipe, opening a pressure relief valve on the pressure relief pipe, continuously supplying water into the water collecting tank, enabling water to enter the pressure measuring pipe along the water outlet pipe, enabling the water to flow out of the pressure relief pipe and enter the measuring cylinder, and adjusting the pressure of the water inlet end of the pressure measuring pipe through a pressure adjusting valve;
and step 3): gradually adjusting a pressure regulating valve to enable the pressure at the water inlet end of the pressure measuring pipe to be gradually increased, measuring the maximum water pressure which can be blocked after a magnetic self-polymerization slurry is adsorbed by a magnetic blocking rod with a certain proportion through a third electronic manometer at the water outlet end of the pressure measuring pipe, namely finishing the blocking once the measured water blocking pressure falls, wherein the maximum water pressure is the blocking pressure of the magnetic self-polymerization slurry under the test condition in a pressure release state, and counting the data of a flowmeter, a graduated cylinder and an electronic scale to obtain the numerical value of the pressure released water quantity;
and step 4): measuring the drawing force data of the corresponding magnetic blocking rod in the maximum water pressure state in the step 3) by using a tension meter, and analyzing later test data;
and step 5): replacing the magnetic blocking rods with different magnetic grades and configuring magnetic self-polymerization slurry according to different proportions, and repeating the steps 1) to 4) to obtain experimental data of water blocking and shearing resistance under the pressure relief state.
Preferably, header tank one end and water piping connection, the other end passes through the outlet pipe and is connected with pressure-measuring pipe one end water inlet detachably, pressure-measuring pipe other end delivery port position and a magnetism plug rod tip shutoff cooperation, magnetism plug rod and pressure-measuring pipe shutoff complex position department magnetic force adsorb has magnetism to gather from the thick liquid, and the magnetism plug rod other end is equipped with the tensiometer through pull rod and pressure-measuring pipe tip fixed connection on the pull rod.
Preferably, one end of the water collecting tank is connected with the nitrogen pressure supplementing bottle through a pressure supplementing pipe, the water outlet pipe is further connected with a pressure reducing pipe, and a pressure reducing valve is arranged on the pressure reducing pipe.
Preferably, the inside cavity of the magnetic blocking rod is provided with a pressure release pipe in a penetrating manner, and the pressure release pipe is provided with a pressure release valve.
Preferably, the tail end of the pressure relief pipe extends into the measuring cylinder, the measuring cylinder is placed on the electronic scale, and the flow meter is arranged on the pressure relief pipe.
Preferably, the other end of the magnetic blocking rod is fixedly connected with an annular tightening hoop fixedly arranged at the end part of the piezometer tube through a drawing rod.
Preferably, a first electronic manometer is arranged on the water collecting tank, a second electronic manometer is arranged on the water outlet pipe, and a third electronic manometer is arranged at the water outlet end of the piezometric pipe.
Preferably, the water inlet end of the piezometric tube is also provided with a pressure regulating valve and a fourth electronic manometer.
Preferably, the magnetic self-polymerization slurry is oily epoxy resin magnetic self-polymerization slurry or aqueous epoxy resin magnetic self-polymerization slurry, and the oily epoxy resin magnetic self-polymerization slurry comprises epoxy resin A glue, an epoxy resin curing agent, fly ash and ferroferric oxide powder; the aqueous epoxy resin magnetic self-polymerization slurry comprises epoxy resin emulsion, an epoxy resin curing agent, cement, water and ferroferric oxide powder.
The invention has the beneficial effects that:
1. the method can test and study performance parameters when the magnetic self-polymerization slurry with different magnetic force grades adsorbs water outlet ends by the magnetic self-polymerization rods with different proportions, and obtains the plugging pressure of the magnetic self-polymerization slurry in a pressure relief state and experimental data of the water plugging shear resistance corresponding to the magnetic self-polymerization slurry with different magnetic force grades and different proportions, thereby being beneficial to the practical application and popularization of engineering;
2. the testing device designed by the invention can simulate water pressure fields of water bursting working conditions of various underground projects such as tunnels and the like, and the test data of the testing device is closer to the actual project.
3. The testing device provided by the invention provides a brand new scheme that a pressure relief pipe is arranged in the magnetic blocking rod in a penetrating manner, in practical engineering application, the water blocking performance of the magnetic blocking rod for adsorbing the magnetic self-aggregation slurry to block the water outlet end can be further improved through the design of the pressure relief pipe, the blocking capability and the blocking timeliness of the magnetic self-aggregation slurry are greatly improved, and the engineering application value of the magnetic self-aggregation slurry can be greatly increased due to the introduction of a pressure relief water blocking mechanism.
4. The invention can synthesize the coupling effect of various parameters of material proportions such as the mixing amount of magnetic powder (ferroferric oxide powder), the aggregation ratio, the water-cement ratio and the like to test the water plugging performance of the magnetic aggregation slurry, has excellent applicability and innovativeness, integrates the material proportions and a test device, has the advantages of simple and convenient operation, low cost, flexibility, convenience and wide application, is more important, can be popularized to the simulation of most water inrush working conditions to obtain the water plugging capacity parameters of the slurry, and has excellent engineering value and academic value for guiding the construction and wide application of the magnetic aggregation slurry.
Drawings
FIG. 1 is a schematic structural view of a magnetic self-polymerization slurry water plugging and shearing resistance testing device;
FIG. 2 is an enlarged schematic structural view of an area where a water outlet end of the piezometer tube is located;
FIG. 3 is a diagram of a state of self-polymerization of magnetically self-polymerized slurry adsorbed by a magnetic blocking rod;
FIG. 4 is a schematic view of the magnetic self-polymerization slurry blocking self-polymerization state.
Detailed Description
The invention is described in further detail below with reference to the figures and specific embodiments.
As shown in fig. 1 to 4 for the present embodiment provides a magnetism is from gathering stifled water shearing performance testing arrangement of thick liquid, it includes inlet tube 1 and the header tank 2 of being connected with inlet tube 1, header tank 2 is connected with 4 one end water inlets detachably of pressure-measuring pipe through outlet pipe 3, 4 other end delivery port positions of pressure-measuring pipe and 5 tip shutoff cooperations of magnetism stopper stick, magnetism adsorbs magnetism is from gathering thick liquid 6 with 4 shutoff complex position departments of pressure-measuring pipe to magnetism stopper stick 5, and the 5 other ends of magnetism stopper stick pass through pull rod 7 and 4 tip fixed connection of pressure-measuring pipe, are equipped with tensiometer 8 on the pull rod 7.
Preferably, one end of the water collecting tank 2 is connected with a nitrogen pressure compensation bottle 10 through a pressure compensation pipe 9, the water outlet pipe 3 is further connected with a pressure reduction pipe 11, and a pressure reduction valve 12 is arranged on the pressure reduction pipe 11. In this embodiment, if the water pressure is not enough in the header tank 2, can open nitrogen gas pressure supplementing bottle 10, let in nitrogen gas through pressure supplementing pipe 9 in to header tank 2 to realize the pressure boost process, can simulate the different water pressure sizes of various secret gushing water operating mode like this.
Preferably, the magnetic blocking rod 5 is hollow and provided with a pressure release pipe 13 in a penetrating manner, and the pressure release pipe 13 is provided with a pressure release valve 14. Through increasing pressure release pipe 13, can further improve magnetism of magnetism stifled stick 5 and adsorb the water shutoff performance of magnetism auto polymerization thick liquid 6 shutoff water outlet end, for example in engineering practical application process, at the initial stage that utilizes magnetism stifled stick 5 to adsorb magnetism auto polymerization thick liquid 6 shutoff water outlet end, can open relief valve 14 on pressure release pipe 13 earlier, partial water pressure is unloaded, alright reduce the pressure of too big water pressure to magnetism auto polymerization thick liquid 6 position like this, treat magnetism auto polymerization thick liquid 6 and solidify the back completely, close relief valve 14 on pressure release pipe 13 again, alright in this way totally shutoff water outlet end.
Preferably, the end of the pressure relief pipe 13 extends into the measuring cylinder 15, the measuring cylinder 15 is placed on the electronic scale 16, and the pressure relief pipe 13 is provided with the flowmeter 23. The volume of the water amount discharged through the pressure relief pipe 13 can be measured through the measuring cylinder 15, the flow data can be obtained through the flowmeter 23, and the weight data can also be obtained through the electronic scale 16.
Preferably, the other end of the magnetic blocking rod 5 is fixedly connected with an annular tightening hoop 17 fixedly arranged at the end part of the piezometer tube 4 through a drawing rod 7.
Preferably, a first electronic pressure gauge 18 is arranged on the water collecting tank 2, a second electronic pressure gauge 19 is arranged on the water outlet pipe 3, and a third electronic pressure gauge 20 is arranged at the water outlet end of the pressure measuring pipe 4.
Preferably, the water inlet end of the piezometer tube 4 is further provided with a pressure regulating valve 21 and a fourth electronic manometer 22.
Preferably, the magnetic self-polymerization slurry 6 is oily epoxy resin magnetic self-polymerization slurry or aqueous epoxy resin magnetic self-polymerization slurry, and the oily epoxy resin magnetic self-polymerization slurry comprises epoxy resin A glue, an epoxy resin curing agent, fly ash and ferroferric oxide powder; the aqueous epoxy resin magnetic self-polymerization slurry comprises epoxy resin emulsion, an epoxy resin curing agent, cement, water and ferroferric oxide powder.
In this embodiment, the magnetic self-polymerization slurry of the oily epoxy resin has the following advantageous properties: the curing speed is high, and the curing can be quickly carried out within 30-120 min; the material is insoluble in water, has good hydrophobicity and excellent dispersion resistance; high permeability and good injection performance, and can penetrate into a crack of 0.1 mm; the shrinkage is low: the resin has the advantages that the resin is cured and formed and is completely contacted with a bearing surface, and the contractibility is less than 2%; high strength and early strength: the compressive strength is more than or equal to 50Mpa in 1 day, and the compressive strength is greatly superior to that of a cement-based material; the creep resistance is good: the product can be used for a long time under severe physical working conditions of freezing and thawing alternation between minus 50 ℃ and plus 80 ℃ and the like without plastic deformation; the toughness is high: any dynamic load which can cause the cement-based grouting layer to burst can be decomposed and transmitted; the material is suitable for the concentrated water inrush working condition of small hole and high pressure in a local small range, can be popularized and applied to the reinforcement and repair of cracks and defects of various structures and buildings, and has wide application range and wide engineering application prospect.
The magnetic self-polymerization aqueous epoxy resin slurry has the following advantages: the construction cost is low, the dosage is large, so that the cast iron can be suitable for large-area casting and application; the viscosity of the material can be proportionally regulated and controlled according to the water-cement ratio, the aggregate-cement ratio and the magnetic powder mixing amount, so that the regulation threshold of the magnetic self-aggregation function is increased; the requirement on a curing environment is low, the bonding effect with a substrate material in a humid and water environment can be greatly enhanced compared with that of common slurry, and the controllable range of the mechanical property of the magnetic self-polymerization slurry is wide; the material has high cost performance and wide application range, can be popularized and applied to the anti-seepage and water inrush treatment of any tunnel and underground engineering, has good stability, and has the tensile advantage of magnetic self-aggregation performance.
In addition, the embodiment also discloses a water plugging test method of the magnetic self-polymerization slurry water plugging and shearing resistance test device, which comprises the following steps:
step 1): one end of a magnetic blocking rod 5 with a certain magnetic force grade is adopted to adsorb magnetic self-aggregation slurry 6 with a certain proportion, then the water outlet end of the pressure measuring pipe 4 is blocked, and the other end of the magnetic blocking rod 5 is fixedly connected with an annular tightening hoop 17 fixedly arranged at the end part of the pressure measuring pipe 4 through a drawing rod 7, so that the positions of the magnetic blocking rod 5 and the adsorbed magnetic self-aggregation slurry 6 are fixed;
step 2): opening a valve on the water inlet pipe 1, closing a pressure relief valve 14 on the pressure relief pipe 13, continuously supplying water into the water collecting tank 2, allowing the water to enter the pressure measuring pipe 4 along the water outlet pipe 3, and adjusting the pressure of the water inlet end of the pressure measuring pipe 4 through a pressure adjusting valve 21;
step 3): gradually adjusting a pressure adjusting valve 21 to gradually increase the pressure at the water inlet end of the piezometric tube 4, and measuring the maximum water pressure which can be blocked after the magnetic self-aggregation slurry 6 with a certain proportion is adsorbed by the magnetic blocking rod 5 with a corresponding magnetic force grade through a third electronic manometer 20 at the water outlet end of the piezometric tube 4, namely finishing the blocking once the measured water blocking pressure falls, wherein the maximum water pressure is the magnetic self-aggregation slurry blocking pressure under the test condition;
step 4): measuring the drawing force data of the corresponding magnetic blocking rod 5 in the maximum water pressure state in the step 3) through a tension meter 8, and analyzing later test data;
and step 5): replacing the magnetic blocking rods 5 with different magnetic grades and configuring magnetic self-polymerization slurry 6 according to different proportions, and repeating the steps 1) to 4) to obtain experimental data of water blocking and shearing resistance.
The embodiment discloses a method for testing pressure relief, water shutoff and shear resistance of magnetic self-polymerization slurry, which comprises the following steps of:
step 1): one end of a magnetic blocking rod 5 with a certain magnetic force grade is adopted to adsorb magnetic self-aggregation slurry 6 with a certain proportion, then the water outlet end of the pressure measuring pipe 4 is blocked, and the other end of the magnetic blocking rod 5 is fixedly connected with an annular tightening hoop 17 fixedly arranged at the end part of the pressure measuring pipe 4 through a drawing rod 7, so that the positions of the magnetic blocking rod 5 and the adsorbed magnetic self-aggregation slurry 6 are fixed;
step 2): opening a valve on the water inlet pipe 1, opening a pressure relief valve 14 on the pressure relief pipe 13, continuously supplying water into the water collecting tank 2, enabling the water to enter the pressure measuring pipe 4 along the water outlet pipe 3, enabling the water to flow out of the pressure relief pipe 13 and enter the measuring cylinder 15, and adjusting the pressure of the water inlet end of the pressure measuring pipe 4 through a pressure adjusting valve 21;
and step 3): gradually adjusting a pressure regulating valve 21 to gradually increase the pressure at the water inlet end of the piezometric tube 4, measuring the maximum water pressure which can be blocked after the magnetic self-aggregation slurry 6 with a certain proportion is adsorbed by the magnetic blocking rod 5 with a corresponding magnetic force grade through a third electronic manometer 20 at the water outlet end of the piezometric tube 4, namely finishing the blocking once the measured water blocking pressure falls, wherein the maximum water pressure is the blocking pressure of the magnetic self-aggregation slurry under the test condition in a pressure relief state, and counting the data of the flowmeter 23, the measuring cylinder 15 and the electronic scale 16 to obtain the numerical value of the water amount of the pressure relief;
and step 4): measuring the drawing force data of the corresponding magnetic blocking rod 5 in the maximum water pressure state in the step 3) through a tension meter 8, and analyzing later test data;
and step 5): replacing the magnetic blocking rods 5 with different magnetic grades and configuring magnetic self-polymerization slurry 6 according to different proportions, and repeating the steps 1) to 4) to obtain experimental data of water blocking and shearing resistance under the pressure relief state.
In this embodiment, a proper pressure relief amount can be selected as a fixed value, and then the magnetic self-polymerization slurry 6 is configured by the magnetic blocking rods 5 with different magnetic grades and according to different proportions, and the specific table data of the experimental data of the water blocking shear resistance in the pressure relief state is obtained according to the above steps as follows:
table 1: oily epoxy resin magnetic self-polymerization slurry water plugging performance test mix proportion design table
Table 2: water-based epoxy resin magnetic self-polymerization slurry mixing ratio design table
Table 3: oily epoxy resin magnetic self-polymerization slurry water plugging performance test result
Table 4: water plugging performance test result of water-based epoxy resin
As can be seen from tables 3 and 4, the two types of epoxy resin magnetic self-polymerization slurries have a significant incremental relationship between water shutoff pressure and magnetic field strength. (1) When the magnetic powder doping amount of the oily epoxy resin magnetic self-polymerization slurry is 40%, the Gaussian intensity is 12000GS, and the maximum water plugging pressure head is 81Kpa. However, as the mixing amount of the magnetic powder is continuously increased, the water plugging peak water head pressure starts to gradually fall, the content of magnetized particles in the slurry is increased due to the increase of the mixing amount of the magnetic powder, the nonuniform magnetization effect is enhanced, so that the molecular acting force among the magnetic powder particles wrapped by the epoxy resin slurry base liquid is increased, the particles are gradually separated out from the inclusion, no epoxy resin base liquid is wrapped among the particles, the gaps among the particles are increased, the slurry has a water plugging weak area, and macroscopically shows that the water plugging pressure peak water head is reduced.
(2) The change of the water plugging pressure of the water-based epoxy resin is controlled by the influences of factors such as the aggregate ratio, the water-cement ratio, the magnetic powder mixing amount and the like, the change trend of the peak water head value of the water plugging pressure is in an increasing relation with the increase of the magnetic powder mixing amount, but the influence of the water-cement ratio on the water plugging pressure is obvious, and when the water-cement ratio is 0.2, the slurry has no aggregate adsorption capacity due to overlarge viscosity when the magnetic powder mixing amount is 30%, so that the water plugging is invalid.
Therefore, the method can be used for comprehensively testing the water plugging performance of the magnetic self-aggregation slurry by the coupling effect of various parameters of the material proportion such as the magnetic powder mixing amount, the aggregation-ash ratio, the water-ash ratio and the like, and preliminary test data show that the method has excellent applicability and innovation and has the technology of integrating the material proportion and a test testing device. The method is simple and convenient to operate, low in cost, flexible and convenient, wide in application range, more important, capable of being popularized to simulation of any water inrush working condition, capable of obtaining slurry water shutoff capacity parameters, and excellent in engineering value and academic value for guiding construction and wide application of magnetic self-aggregation slurry.
In addition, the invention provides that the mixing ratio of the magnetic self-polymerization slurry is based on the epoxy resin polymerization modified slurry, the magnetic powder is doped, so that the magnetic self-polymerization slurry has innovative magnetic self-polymerization capability, and meanwhile, compared with the common mortar, the magnetic self-polymerization slurry has natural hydrophobicity and good dispersibility resistance, and the loss rate of the cementing material of the grouting slurry for underwater construction is less than 5%.
Finally, the device and the method for testing the water plugging performance of the magnetic self-polymerization slurry provided by the invention utilize the magnetic adsorption effect to enable the slurry to be agglomerated, particles such as cement, fly ash and the like and epoxy resin polymers are influenced by intermolecular force of magnetic powder particles under the action of a magnetic field, hard accumulation precipitates are generated inside the slurry, the slurry is difficult to disperse, the internal friction angle is enhanced, the agglomeration adsorption effect is obvious, the viscosity of the slurry is instantly improved by the magnetic adsorption, and the device and the method have stronger water plugging and shearing resistance compared with the common slurry in a fluid state.
The above embodiments are merely preferred technical solutions of the present invention, and should not be construed as limitations of the present invention, and features in the embodiments and examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the patent of the invention should be defined by the claims and the equivalents of the technical features of the claims. I.e., equivalent alterations and modifications within the scope and range of equivalents of the invention, are also encompassed by the present patent.
Claims (9)
1. A magnetic self-polymerization slurry pressure-relief water-shutoff shear-resistant performance test method is characterized by comprising the following steps: the method comprises the following steps:
step 1): one end of a magnetic blocking rod (5) with a certain magnetic force grade is adopted to adsorb magnetic self-aggregation slurry (6) with a certain proportion, then the water outlet end of the pressure measuring pipe (4) is blocked, and the other end of the magnetic blocking rod (5) is fixedly connected with an annular tightening ring (17) fixedly arranged at the end part of the pressure measuring pipe (4) through a pulling rod (7), so that the magnetic blocking rod (5) and the adsorbed magnetic self-aggregation slurry (6) are fixed in position;
step 2): opening a valve on the water inlet pipe (1), opening a pressure release valve (14) on the pressure release pipe (13), continuously supplying water into the water collecting tank (2), enabling water to enter the pressure measuring pipe (4) along the water outlet pipe (3), enabling the water to flow out of the pressure release pipe (13) and enter the measuring cylinder (15), and adjusting the pressure of the water inlet end of the pressure measuring pipe (4) through a pressure adjusting valve (21);
step 3): gradually adjusting a pressure regulating valve (21) to gradually increase the pressure at the water inlet end of the piezometric tube (4), measuring the maximum water pressure which can be blocked after a magnetic self-aggregation slurry (6) with a certain proportion is adsorbed by a magnetic blocking rod (5) with a corresponding magnetic force grade through a third electronic manometer (20) at the water outlet end of the piezometric tube (4), namely finishing the blocking once the measured water blocking pressure falls, wherein the maximum water pressure is the blocking pressure of the magnetic self-aggregation slurry under the test condition in a pressure relief state, and counting the data of a flowmeter (23), a measuring cylinder (15) and an electronic scale (16) to obtain the numerical value of the pressure-relieved water quantity;
step 4): measuring the drawing force data of the corresponding magnetic blocking rod (5) in the maximum water pressure state in the step 3) through a tension meter (8) for later test data analysis;
step 5): replacing the magnetic blocking rods (5) with different magnetic grades and configuring magnetic self-polymerization slurry (6) according to different proportions, and repeating the steps 1) to 4) to obtain experimental data of water blocking and shearing resistance under the pressure relief state.
2. The magnetic self-polymerization slurry pressure relief and water shutoff shear performance test method according to claim 1, characterized in that: header tank (2) one end is connected with inlet tube (1), and the other end passes through outlet pipe (3) and is connected with pressure-measuring pipe (4) one end water inlet detachably, pressure-measuring pipe (4) other end delivery port position and the stifled stick of magnetism (5) tip shutoff cooperation, magnetism stifled stick (5) and pressure-measuring pipe (4) shutoff complex position department magnetic force adsorbs has magnetism to gather from thick liquid (6), and shown magnetism stifled stick (5) other end is equipped with tensiometer (8) through drawing pole (7) and pressure-measuring pipe (4) tip fixed connection on drawing pole (7).
3. The method for testing the pressure relief, water shutoff and shear resistance of the magnetic self-polymerization slurry according to claim 2, characterized by comprising the following steps: one end of the water collecting tank (2) is connected with a nitrogen pressure supplementing bottle (10) through a pressure supplementing pipe (9), the water outlet pipe (3) is also connected with a pressure reducing pipe (11), and the pressure reducing pipe (11) is provided with a pressure reducing valve (12).
4. The magnetic self-polymerization slurry pressure relief and water shutoff shear performance test method according to claim 2, characterized in that: the magnetic blocking rod (5) is hollow inside and provided with a pressure release pipe (13) in a penetrating mode, and a pressure release valve (14) is arranged on the pressure release pipe (13).
5. The method for testing the pressure relief, water shutoff and shear resistance of the magnetic self-polymerization slurry according to claim 4, characterized by comprising the following steps: the tail end of the pressure relief pipe (13) extends into the measuring cylinder (15), the measuring cylinder (15) is placed on the electronic scale (16), and the flowmeter (23) is arranged on the pressure relief pipe (13).
6. The magnetic self-polymerization slurry pressure relief and water shutoff shear performance test method according to claim 2, characterized in that: the other end of the magnetic blocking rod (5) is fixedly connected with an annular tightening hoop (17) fixedly arranged at the end part of the piezometer tube (4) through a drawing rod (7).
7. The method for testing the pressure relief, water shutoff and shear resistance of the magnetic self-polymerization slurry according to claim 2, characterized by comprising the following steps: the water collecting tank (2) is provided with a first electronic pressure gauge (18), the water outlet pipe (3) is provided with a second electronic pressure gauge (19), and the water outlet end of the pressure measuring pipe (4) is provided with a third electronic pressure gauge (20).
8. The magnetic self-polymerization slurry pressure relief and water shutoff shear performance test method according to claim 2, characterized in that: and the water inlet end of the pressure measuring pipe (4) is also provided with a pressure regulating valve (21) and a fourth electronic manometer (22).
9. The method for testing the pressure relief, water shutoff and shear resistance of the magnetic self-polymerization slurry according to claim 2, characterized by comprising the following steps: the magnetic self-polymerization slurry (6) is oily epoxy resin magnetic self-polymerization slurry or water-based epoxy resin magnetic self-polymerization slurry, and the oily epoxy resin magnetic self-polymerization slurry comprises epoxy resin A glue, an epoxy resin curing agent, fly ash and ferroferric oxide powder; the waterborne epoxy resin magnetic self-polymerization slurry comprises epoxy resin emulsion, an epoxy resin curing agent, cement, water and ferroferric oxide powder.
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