45results about How to "Reduce the difficulty of quality control" patented technology

The present invention relates to a wood pulp nonwoven fabric for manufacturing filter tip of cigarette. Said invention uses wood pulp fiber and high-melting point synthetic fiber or / and artificial fiber as raw material and adopts air laying mode to make them into fiber web, then utilizes adhesive to make crosslinking reaction so as to obtain the invented nonwoven fabric for manufacturing filter tip of cigarette.

A preparation system of a panel rock-fill dam bedding material comprises a coarse crushing segment. A first screening segment, an intermediate crushing segment, a second screening segment and a fine crushing segment are arranged below the coarse crushing segment. A main screening segment is arranged below the fine crushing segment, and an ultra-fine crushing segment is arranged below the main screening segment. A first-grade finished bedding taking point is arranged behind the intermediate crushing segment. A second-grade finished bedding taking point is arranged behind the fine crushing segment. A third-grade finished bedding taking point is arranged behind the ultra-fine crushing segment. Finished bedding materials taken from the three grades of finished bedding taking points are all conveyed to a finished product stock dump through a belt conveyor. Under treatment of the effective crushing and screening technology, gradation compositions of materials at all joints in the technology process are controlled, the upstream and downstream multi-grade technology joints are selected as the taking points along with the technology process, and the cost of the finished bedding materials is greatly reduced by means of four segments of crushing and three grades of finished bedding material taking; and the first part and the second part are long-gradation continuous mixtures, a mixing link generated in the stacking, taking and transporting process is gathered into a subsequent sealing-tape machine, and the quality control difficulty is reduced.

The instant disclosure relates to bi-direction data transmission method, high-frequency connector and an optical connector using the same. The optical connector includes a first circuit board, a second circuit board, a high-frequency connector and an optical fiber cable. One optical engine is set on the first circuit board. The high-frequency connector is set between the first circuit board and the second circuit board for connecting both two circuit boards. The high-frequency connector includes an insulation base. The insulation base has at least one terminal-accommodating region. Pluralities of connection terminals are inserted into the terminal-accommodating regions of the insulation base. The optical fiber cable connects to the one optical engine.

The invention discloses a space truss structure and a construction method thereof, and relates to the technical field of constructional engineering. The problems that an existing steel-structure truss is large in steel consumption, weak in overall rigidity, large in installation and construction difficulty and low in work efficiency are solved. The space truss structure is a space mesh structure formed by continuously splicing a plurality of truss units. Each truss unit comprises a plurality of rod pieces distributed in the axis of the truss unit in the radial direction, wherein the crossed ends of the rod pieces are fixedly connected together through a connecting plate, and each rod piece is made of aluminum alloy. The construction method includes the steps of prefabricating the rod pieces and the connecting plates in a factory, numbering all the components during site installation and construction, making the components correspond to the design drawings one to one, classifying the components, connecting all the rod pieces in the truss units with the connecting plates through bolts, supporting the rod pieces by a concrete structure or a steel column of a building through supports, and then completing splicing and fixing of the space truss structure step by step.

The invention discloses a novel low-smoke, halogen-free and fireproof insulated wire and a manufacturing method thereof. The fireproof insulated wire comprises wire conductors and an insulated layer. The wire conductors are formed by intertwisting one to sixty-one circular annealed copper wires with a diameter of [phi]1.2-4.5mm in a length direction. The insulated layer is disposed outside the wire conductors, and is a ceramic polyolefin material. The manufacturing method comprises the following steps: S1, drawing copper wires: drawing an oxygen-free copper rod with a 8.0mm diameter and resistivity not more than 0.017241[omega]*mm<2> / m into copper wires with a diameter of [phi]1.2-4.5mm through a conventional technology, the output speed of the copper wires being 3-25m / s, preheating the copper wires to 240-260 DEG C after copper wire drawing, introducing nitrogen, heating the copper wires again to 550-560 EDG C for recrystallization, and blow-drying the copper wires by compressed air and cooling the copper wires to 80 DEG C below after watering cooling; S2, intertwisting conductors (except single-core conductors); S3, extruding an insulated layer; and S4, making an insulated wire a roll. The manufacturing method is easy to operate, the quality control difficulty is minimized, the secondary investment cost of the wire can be reduced if people use the fireproof insulated wire, and the service life of the wire can be prolonged.

The invention discloses a manufacturing method of a metal film filter material; isostatic cool pressing equipment is adopted to press a metal powder coating layer, so that the binding force of the coating layer and a porous metal matrix is greatly improved, the problems of cracking, peeling, hollowing and the like in the manufacturing process of the metal film filter material are effectively avoided, the defective rate of the metal film filter material is reduced, and the strength and the filtering performance of the metal film filtering material are improved. According to the invention, the difficulty of coating layer quality control is reduced, the process is simple, the production cost is low, the film pore size distribution is narrow, the film flatness is high, and the defects are few.

The invention discloses an active control method for horizontal bridge turner construction. The method comprises following construction steps: (1), a prefabricated bridge structure located on a turn plate rotating system is subjected to weighing test, unbalanced moment and spherical hinge friction coefficient of the bridge structure are obtained, then primary counter weight processing is performed, and the structure is in an ideal balance state relative to the turner center; (2), two symmetric active supporting points capable of sliding on a rotary road are formed at the top of the rotary roadin the rotary road intersection position of the girder axis direction and the turn plate rotating system, the tops of the active supporting points are contacted with the bottom of an upper turn plateof the turn plate rotating system, secondary counter weight capable of overcoming the spherical hinge pivoting friction torque of the turn plate rotating system is arranged on any one cantilever sideof the bridge structure, the active supporting points are enabled to be stressed, a supporting state of the turner structure is changed into a simple support stress state jointly supported by a spherical hinge and the active supporting points from a spherical hinge center supporting state, and a bridge turner is subjected to turner construction in the simple support state.

The invention discloses a forming agent for hard alloy production. The forming agent for hard alloy production comprises: by mass, 10 to 20% of polyisobutylene, 0 to 10% of paraffin and 70 to 85% of dissolved gasoline 120#. The forming agent for hard alloy production can be prepared easily, has good formability, good fluidity and low carbon residual amount, is non-hygroscopic, has good powder fluidity, allows low compacting pressure, realizes a high compacting qualification rate and stable and controllable product piece weight and sizes, can be utilized for a re-doping process carried out after a spray drying process or a mixture drying process, is suitable for large-scale production, and has low quality control difficulty. The forming agent for hard alloy production can be prepared from the components, or the components of the forming agent for hard alloy production can be directly mixed with hard alloy powder and the mixture is utilized for follow-up production.

The invention discloses a power division network, a 5G antenna module and an assembling method of the 5G antenna module, and the 5G antenna module comprises a reflecting plate; a phase shifter which is arranged below the reflecting plate; a mounting assembly which is mounted on the upper end surface of the reflecting plate and is used for mounting a power dividing network; a reflecting plate disposed above the feeding member of the power dividing network, wherein the electric connection part of the phase shifter is connected with the connection component of the power division network; and thereflecting plate and the feed component of the power division network form an antenna oscillator. The power division network thoroughly gets rid of the arrangement of a PCB, and achieves the integration of the power division network and the feed unit of the antenna oscillator, the integration of the insulating installation seat and the installation seat of the antenna oscillator, and the integration of the power division network and the phase shifter. The 5G antenna module is high in assembly efficiency, simplifies the later welding process, reduces the welding requirements, reduces the laterquality control difficulty, and greatly shortens the production time. The problems of high material cost and high production cost are solved, and the comprehensive competitiveness of communication products is improved.

The invention relates to an elevated stereoscopic cold storage based on a grid structure. The elevated stereoscopic cold storage comprises a raft foundation, a heat preservation structure and a bearing vertical column, the heat preservation structure is arranged on the hexahedron of the cold storage, the bearing vertical column is fixed to the raft foundation, the bearing vertical column comprisesa plurality of grid units which are sequentially connected, the grid units comprise connecting pieces and connecting rods for connecting the connecting pieces, and the bearing vertical column of thecold storage is formed by sequentially connecting the multiple grid units. The elevated stereoscopic cold storage has the beneficial effects that the bearing vertical column of the cold storage is a space system composed of the multiple grid units, and the advantages of good integrity of a space stress system, large rigidity, good seismic performance, high assembly precision, convenient assembly,lower construction cost and the like are achieved; and the grid units are accurately manufactured in advance by a factory, assembled and fixed on site according to a design drawing, the construction link is single, and the difficulty of construction management and quality control is greatly lowered.

The invention discloses a floating sizing die, which comprises an upper template, an upper die cutter block, a lower template, a lower die cutter block, a guide part and a floating sizing cutter block transversely arranged between the upper die cutter block and the lower die cutter block. Negative angle forming parts which are matched and used for generating negative angles by extruding a U-shaped punching piece are arranged on the upper die cutter block, the lower die cutter block and the floating sizing cuter block. The U-shaped punching piece is sleeved on the negative angle forming parts of the floating sizing cuter block. By adopting the technical proposal, the problem of incapability of producing the U-shaped punching piece with the negative angle in the prior art can be well solved; the die is simple in structure and high in production efficiency and capable of punching and forming at one time; the accumulative tolerance caused by fractional assembly can be avoided; the productprecision is increased; the tooling number is reduced; the process is shortened; and the production cost and the production and quality control difficulty can be reduced.

The invention relates to a reactive dye continuous pad-dyeing shorted and wet steaming machining process for towel and quilt fabrics, which is characterized in that an oil pressure evenness calender is selected and used; the liquor retention is controlled in the range of 90 to 100 percent; the adoption of a low-capacity trough ensures that the exchange of dye liquor is completed in a short time; saturated steam is used in a steaming box, so that the influence of the towel and quilt fabrics with high liquid taking quantity on the temperature and the humidity after the towel and quilt fabrics enter the steaming box is reduced; a special dye liquor stabilizer for reducing the hydrolyzation speed of dye is added into the dye liquor; and the dyeing is completed under the temperature and humidity conditions regulated by the process. The process has the advantages of high production efficiency, low energy consumption, low labor intensity, low environmental pollution, low aberration and stable product quality.

The invention discloses a compression assembly. The compression assembly comprises a connecting rod, a piston, a crank shaft and a self-aligning connecting portion. The self-aligning connecting portion comprises an outer ring and a spherical connecting piece, wherein the outer ring is matched with a connecting hole of the end portion of the connecting rod, and the spherical connecting piece is in clearance fit with the outer ring. The self-aligning connecting portion is connected with at least one of the piston and the crank shaft through a through hole formed in the spherical connecting piece. The compression assembly is provided with the self-aligning connecting portion, so that the form and location tolerance requirement of inner parts of the compression assembly is lowered, and therefore the machining cost and the quality control difficulty of the compression assembly are reduced. In addition, due to the fact that the compression assembly enables the end portion of the connecting rod to be still of a connecting hole structure, the problem that the connecting rod is prone to deformation due to arrangement of a sphere head is solved. Besides, the compression assembly further reduces the machining difficulty of the piston, lowers the requirement for materials of the piston and solves the problem that when the inlet portion of the piston is shrunk, the holding force is hard to control. The invention further discloses a compressor with the compression assembly.

The invention provides a method for preparing the raw material of float glass, wherein the raw material is formed by mixing ecdemic silica sand, Dangyang silica sand, calcite, dolomite, calcined soda, mirabilite, powdered carbon, shattered glass, etc. The method for preparing the raw material of the float glass adds no feldspar in the raw material, avoids brush line, nepheline and knob caused by large grain in feldspar powder, reduces the usage amount of ecdemic sand, and reduces the phenomenon of a concretion defect caused by egg-shaped float slag on the surface of the glass. The material preparing scheme without the feldspar reduces quality control difficulty, improves the melting condition in a glass furnace, and obviously reduces the usage amount of natural gas. Small impurity, the knob and the brush line in the glass product are reduced step by step, optical deformation is more than 60 degrees, daily melting amount is improved at 600t under the same condition, daily yield is increased by 1500 weight case, and the consumption of the natural gas is reduced by 0.3m<3>in each weight case.

The invention provides a pressure balance control method of a refrigerator. The refrigerator comprises a chamber, a door body for opening or closing the chamber, a refrigerating system for providing cold energy to the chamber, an ice maker arranged on the door body and a control device used for controlling operation of the refrigerator. The refrigerating system further comprises a refrigerating air duct, a refrigerating fan, a first air door, an ice making air duct, an ice making fan and a second air door, wherein the refrigerating air duct is used for delivering cold energy to the chamber; the refrigerating fan and the first air door are arranged on the refrigerating air duct; the ice making air duct is used for conducting cold energy to the ice maker; and the ice making fan and the second air door are arranged on the ice making air duct. The door body is provided with an ice outlet used for taking ice and an ice outlet cover plate covering the ice outlet. The control method comprisesthe following steps of S1, judging whether the refrigerator needs to be decompressed or not, and if yes, executing the step S2; S2, opening the first air door, the second air door and the ice outletcover plate, and controlling the ice maker to rotate reversely; and S3, controlling the ice making fan to stop rotating reversely and closing the ice outlet cover plate after the refrigerating fan rotates reversely for a period of time t. Through the pressure balance control method of the refrigerator, under the condition of not adding components, the internal and external pressure of the refrigerator is balanced to facilitate door opening.

The invention discloses a motor flexible PG board, which comprises a substrate and Hall circuits arranged on the substrate. The substrate of the PG board adopts a flexible circuit board. The flexible circuit board is in an E-shaped structure comprising three branches. The Hall circuits are arranged on the top ends of the three branches respectively. The three branches are mutually nonparallel; the branches at the two sides converge to the middle and form acute-angle included angles with the middle branch respectively. The motor flexible PG board is in an axisymmetric distribution structure with the branch in the middle as a symmetry axis. The step of manual assembly of an insulating bush is saved; full-automatic SMD process is realized; the flexible PG board has flexible three-dimensional space assembly capability, and the PG boards of the same type can be fit to more motors; the flexibility of the PG board helps to reduce assembly labour intensity of workers effectively; and the motor flexible PG board is compatible with the PG boards of all hub motors, including a 60-degree motor and a 120-degree motor, and hub motors of different wheel diameters.

The invention relates to a fat emulsion of Paricalcitol. The fat emulsion comprises oil for injection, an emulsifier, a stabilizer, an isoosmotic adjusting agent, and a pH adjusting agent. Emulsion droplets have an average diameter of 50nm-1000nm. The fat emulsion can be prepared into injection emulsions, freeze-dried emulsions or capsules. Specifically, organic solvents cannot be employed as injections so as to reduce stimulation on blood vessels during injection and avoid injection package material impurity leaching caused by organic solvents, thus ensuring product quality and safety, and reducing the difficulty of product quality control.

The invention relates to the tunnel waterstop construction field, and specifically relates to a tunnel longitudinal steel edge waterstop movable fixture construction method. The tunnel longitudinal steel edge waterstop movable fixture construction method can greatly reduce the construction cost and the construction period. Compared with a conventional steel edge waterstop fixing device, the tunnellongitudinal steel edge waterstop movable fixture construction method has the advantages that the processing is convenient; the installation is fast; the adaptability is wide; the construction efficiency is high; the construction requirement can be met; and during the low wall concrete pouring process, twisting of the steel edge waterstop can be prevented so as to avoid influencing the waterproofquality.

The instant disclosure relates to bi-direction data transmission method, high-frequency connector and an optical connector using the same. The optical connector includes a first circuit board, a second circuit board, a high-frequency connector and an optical fiber cable. One optical engine is set on the first circuit board. The high-frequency connector is set between the first circuit board and the second circuit board for connecting both two circuit boards. The high-frequency connector includes an insulation base. The insulation base has at least one terminal-accommodating region. Pluralities of connection terminals are inserted into the terminal-accommodating regions of the insulation base. The optical fiber cable connects to the one optical engine.

The invention relates to the technical field of pharmacy, and discloses a cetirizine hydrochloride tablet and a preparation method thereof, the cetirizine hydrochloride tablet comprises cetirizine hydrochloride and porous silicon; the weight ratio of cetirizine hydrochloride to porous silicon is 1: (3-5); the cetirizine hydrochloride tablet also comprises microcrystalline cellulose, and the weight ratio of cetirizine hydrochloride to microcrystalline cellulose is 1: (2-6); the microcrystalline cellulose is one or a combination of microcrystalline cellulose 102 and microcrystalline cellulose 112. According to the invention, the production operation procedure is simplified, the addition of auxiliary materials is reduced, the process quality control difficulty is reduced, and industrial mass production is facilitated.

The invention discloses a power division network, a 5G filtering antenna and an assembling method of the 5G filtering antenna. The 5G filtering antenna comprises a reflecting plate, a plastic component and an oscillator sheet, wherein the plastic component is mounted on the upper end surface of the reflecting plate and is used for mounting an arbitrary power division network; the oscillator sheetis arranged on a feed component of the power division network; and the oscillator sheet and the feed component of the power division network form an antenna oscillator. The power division network withresonance branches is designed; on one hand, the 5G filtering antenna realizes the filtering function of the 5G filtering antenna through the arrangement of the power division network provided with the split-ring resonators, can remove a filter of an existing antenna, integrates the out-of-band rejection capability of the filter in the antenna, greatly reduces the number of filter resonant cavities, and reduces the cost; meanwhile, the occupied space is effectively reduced, and miniaturization development of the active antenna processing unit is facilitated; and on the other hand, the isolation between positive and negative polarizations of the antenna is increased, the performance is improved, and the comprehensive competitiveness of communication products is improved.

The invention discloses an earthen archaeological site crack repairing slurry utilizing the original soil. The earthen archaeological site crack repairing slurry comprises the following components inpercentage by mass: 50%-55% of earthen archaeological site original soil, 15%-17% of dry fine sand, 28%-34% of water glass with the concentration of 26.6% and 1% of sodium lignin sulfonate. The preparation and use method comprises the following steps: (1) grinding original soil of the earthen site into powder; (2) preparing pure dry fine sand, a 26% sodium silicate aqueous solution, and analytically pure sodium lignin sulfonate; (3) sequentially adding lignin, original soil and fine sand into the sodium silicate aqueous solution, and uniformly stirring; (4) standing an obtained slurry for morethan 1 hour, and releasing bubbles in the slurry after the slurry is uniform; (5) checking the fluidity of the slurry by using a disposable injector, and if the slurry can smoothly pass through a 2mminjector round hole, the fluidity of the slurry is better, and the slurry can be used for repairing thinner cracks; when large cracks are repaired, increasing the proportion of original soil to finesand; and (6) grouting and maintaining for 14-28 days.

The invention discloses an immune lateral chromatography detection method and device for carrying out external drive on a biomarker. The device comprises immune lateral chromatography test paper consisting of a bottom liner 1, a sample pad 2, a combination pad 3, an analysis membrane 4 and a water absorption pad 5, wherein the analysis membrane is provided with a detection belt 6 and a quality control belt 7; the device further comprises an upstream drive electrode 8 and a downstream drive electrode 9; the upstream drive electrode is connected with the end part of the upstream outer side of the sample pad; the downstream drive electrode is connected with the end part of the downstream outer side of the water absorption pad. According to the method disclosed by the invention, strong and uniform external drive force generated by the electrodes is used as a power source to carry out external drive on surging of the biomarker, so that the precision, the accuracy and the detection speed ofvarious existing immune lateral chromatography technologies are greatly improved; on the basis, the detection sensitivity is improved through promoting release of the biomarker.

An automatic hydraulic numerical control pipe bending machine, mainly composed of a bed, an industrial computer, a displacement sensor, a Y cylinder, a photoelectric encoder, X, Y servo valves, a hydraulic servo system, an X cylinder, a feeding bracket, a moving wheel, and a fixed roller , It is composed of a roller, a rectangular tube, a lifting bracket, a slide rail, a core holder and a core holder bracket. The successful application of the fully automatic hydraulic CNC pipe bender has greatly reduced the workload of shape correction and the difficulty of quality control of the corresponding assembly in the follow-up process. The position control accuracy and fast dynamics of the Y oil cylinder should be the key to ensure the bending accuracy. The X cylinder of the pipe bending machine adopts hydraulic servo speed control, and the Y cylinder adopts hydraulic servo position closed-loop control, which can meet the processing accuracy requirements of vehicle pipe fittings.

The invention discloses a floating sizing die, which comprises an upper template, an upper die cutter block, a lower template, a lower die cutter block, a guide part and a floating sizing cutter block transversely arranged between the upper die cutter block and the lower die cutter block. Negative angle forming parts which are matched and used for generating negative angles by extruding a U-shaped punching piece are arranged on the upper die cutter block, the lower die cutter block and the floating sizing cuter block. The U-shaped punching piece is sleeved on the negative angle forming parts of the floating sizing cuter block. By adopting the technical proposal, the problem of incapability of producing the U-shaped punching piece with the negative angle in the prior art can be well solved; the die is simple in structure and high in production efficiency and capable of punching and forming at one time; the accumulative tolerance caused by fractional assembly can be avoided; the product precision is increased; the tooling number is reduced; the process is shortened; and the production cost and the production and quality control difficulty can be reduced.

The invention discloses an in-vitro release detection method of ripdicaine emulsifiable paste, and belongs to the technical field of biological medicines. According to the method, a flow cell is adopted as an experimental device, a to-be-detected riprodicaine emulsifiable paste sample is placed in an emulsifiable paste pool, then a release film is placed in a fixing ring, the fixing ring and the emulsifiable paste pool are assembled to obtain an adapter, a release medium is added into a medium bottle, the flow speed and the water bath temperature of the flow cell are set, and sampling is carried out at fixed time for detection. According to the method, the quality difference of the ripdicaine emulsifiable paste is efficiently and accurately monitored through an in-vitro evaluation method, and the quality control difficulty of an imitated preparation is reduced.

The invention provides a method for controlling the pressure balance of a refrigerator. The refrigerator includes a compartment, a door body for opening or closing the compartment, a refrigeration system for providing cooling capacity to the compartment, an ice maker installed on the door body, and a The control device for the operation of the refrigerator. The refrigeration system also includes the cooling air path that transmits the cooling capacity to the compartment, the cooling fan and the first damper installed on the cooling air path, and the ice-making air path and equipment that transmits the cooling capacity to the ice machine. For the ice-making fan and the second air door of the ice-making air path, the door body is provided with an ice outlet for taking ice and an ice outlet cover set on the ice outlet. The control method includes the following steps: S1. Determine whether the refrigerator needs Perform decompression, if so, execute step S2; S2, open the first damper, the second damper and the ice outlet cover, and control the ice-making fan to reverse; S3, after the refrigeration fan reverses for a certain time t, control the ice-making fan to stop Reverse and close the ice outlet cover. In the case of no additional components, it is easy to open the door by balancing the pressure inside and outside the refrigerator.

A preparation system of a panel rock-fill dam bedding material comprises a coarse crushing segment. A first screening segment, an intermediate crushing segment, a second screening segment and a fine crushing segment are arranged below the coarse crushing segment. A main screening segment is arranged below the fine crushing segment, and an ultra-fine crushing segment is arranged below the main screening segment. A first-grade finished bedding taking point is arranged behind the intermediate crushing segment. A second-grade finished bedding taking point is arranged behind the fine crushing segment. A third-grade finished bedding taking point is arranged behind the ultra-fine crushing segment. Finished bedding materials taken from the three grades of finished bedding taking points are all conveyed to a finished product stock dump through a belt conveyor. Under treatment of the effective crushing and screening technology, gradation compositions of materials at all joints in the technology process are controlled, the upstream and downstream multi-grade technology joints are selected as the taking points along with the technology process, and the cost of the finished bedding materials is greatly reduced by means of four segments of crushing and three grades of finished bedding material taking; and the first part and the second part are long-gradation continuous mixtures, a mixing link generated in the stacking, taking and transporting process is gathered into a subsequent sealing-tape machine, and the quality control difficulty is reduced.

The invention relates to the field of engineering machinery, and discloses a method and device for calibrating the displacement current of a pumping pump and construction machinery. The method includes determining the initial displacement current of the pumping pump; In the case of the pumping pump and the displacement of the pumping pump being controlled by the initial displacement current, determine the pumping times of the pumping pump in the pumping cycle; determine whether the determined pumping times are in the within the range of preset pumping times; and in the case that the determined pumping times are not within the preset pumping times range, updating the initial displacement current until the determined pumping times are within the preset pumping times Send within the range of times to complete the calibration of the displacement current. In this way, the automatic calibration of the displacement current is realized.

The grout for repairing cracks in earthen ruins using original soil and its preparation and use methods. According to mass percentage, its components are: original soil in earthen ruins: 50%~55%, dry fine sand: 15%~17%, and concentration of 26.6%. Water glass: 28%~34%, sodium lignosulfonate: 1%. The steps of the preparation and use method are: step (1) grinding the original soil of the earthen site into powder; step (2) preparing pure dry fine sand and 26% sodium silicate aqueous solution; analyzing pure sodium lignosulfonate; step (3) Add lignin, original soil and fine sand to the sodium silicate aqueous solution in turn, and stir evenly; step (4) let the slurry stand for more than 1 hour, wait for it to be uniform, and release the air bubbles in the mixture; step (5) use a disposable syringe Check the fluidity of the slurry. If the slurry can pass through the 2mm syringe hole smoothly, it has better fluidity and can be used to repair thinner cracks; when repairing larger cracks, increase the ratio of original soil and fine sand; Step (6) Grouting and curing for 14‑28 days.