A pressure equalizing slurry storage device for glacial till geological grouting

Abstract

This invention relates to a pressure equalization and storage device for grouting in glacial till geology, belonging to the technical field of grouting equipment. The pressure equalization and storage device includes a tank body, a pressure-distributing system at the top of the tank body connected to an external pressure supply system, a grout inlet device communicating with the inside of the tank body below the pressure-distributing system, a vertically mounted stirring system inside the tank body, a tank body fixedly mounted on a base box, a temperature control system fixedly mounted on the outer bottom surface of the tank body, and a grout discharge device communicating with the inside of the tank body at the bottom. This invention solves the problem of the grouting pressure surface and grout surface not being parallel inside the storage tank by dividing the airflow in the pressure inlet pipe into three stages through the pressure-distributing system, achieving precise control of the grouting pressure, thereby reducing grout waste and ensuring grouting effect. The stirring system prevents the sedimentation of solid particles in the grout, and the temperature control system regulates the grout temperature, avoiding grout segregation that affects the grouting effect and addressing engineering problems related to different grout temperature control requirements.

Description

Technical Field

[0001] This invention relates to a pressure equalization and grout storage device for grouting in glacial till geological formations, belonging to the technical field of grouting equipment. Background Technology

[0002] In southeastern Tibet, most of the soil is composed of glacial till, a discontinuous engineering medium formed by the deposition of melted glaciers. It is often formed by fine debris and coarse rocks interlocking together, exhibiting extremely poor sorting and weak interparticle cohesion, resulting in a loose structure. Therefore, it is a major factor inducing glacial debris flows and glacial lake outburst floods. To address these geological problems, grouting is often used to inject solidifiable grouts into the cracks or pores of the strata to improve their physical and mechanical properties.

[0003] In actual grouting projects, the extremely poor particle uniformity of glacial till in the same area often necessitates different grouting reinforcement effects. Traditional grouting equipment uses a storage device that is merely a simple storage unit. Due to the arbitrary placement of the pressure inlet and storage device in the existing pressure supply system, the grout surface and pressure surface are not parallel during the actual grouting process. When positioned directly above, the grout in the storage device exhibits a concave distribution with a lower center and higher sides; when positioned to the side, the grout flows back along the pressure inlet in a sloping distribution with a lower bottom and higher top. This non-parallelism between the grout surface and pressure surface leads to uneven grouting pressure distribution within the storage device. During actual grouting, precise control of the grout pressure is often impossible. The grouting pressure requirements are complex. Excessive grouting pressure can damage the original bearing structure of the soil and rock mass, causing stress imbalance and damage to the overlying structures. It can also lead to grout waste due to excessive diffusion radius. Conversely, insufficient grouting pressure can result in inadequate injection and failure to achieve the expected grouting reinforcement effect. In addition, actual grouting operations require a long time, and traditional grout storage devices may experience grout segregation, resulting in solid-liquid separation and affecting the grouting effect and strength. Furthermore, the average winter temperature in southeastern Tibet is -5℃, with minimum temperatures reaching -15℃, which can cause the grout to freeze and prevent grouting operations. Grouting equipment needs to be transported and reassembled in different regions, which presents operational inconveniences. Summary of the Invention

[0004] This invention addresses the problems in grouting engineering in glacial till geology, such as uneven pressure distribution within the grout storage tank leading to inaccurate pressure control and consequently affecting grouting performance, as well as grout segregation, sedimentation, and freezing preventing grouting operations. It proposes a pressure-equalizing grout storage device for glacial till grouting. This device utilizes a pressure-dividing system to divide the airflow in the inlet pipe into three stages, resolving the issue of the grout pressure surface not being parallel to the grout surface inside the storage tank. This achieves precise pressure control and ensures effective grouting. A mixing system prevents grout segregation during prolonged grouting, avoiding solid-liquid separation and grout pipeline blockage, thus resolving the problem of solid-liquid separation affecting grouting performance and strength in traditional devices. A temperature control system regulates grout temperature, addressing grout freezing during grouting in frigid regions. This invention fulfills the engineering requirements of precise grout pressure control, prevention of grout solid particle sedimentation, and grout temperature regulation, ensuring effective grouting in practical projects and resolving existing technical problems.

[0005] The technical solution adopted by this invention to solve its technical problem is as follows:

[0006] A pressure equalization and storage device for grouting in glacial till geological formations includes a tank body 18. A pressure distribution system is provided at the top of the tank body 18, and a pressure supply system is connected to the external pressure distribution system. A grout inlet device communicating with the interior of the tank body 18 is provided below the pressure distribution system. A stirring system is vertically arranged inside the tank body 18. The tank body 18 is fixedly mounted on a base box 24. A temperature control system is fixedly arranged on the outer bottom surface of the tank body 18. A grout discharge device communicating with the interior of the tank body 18 is provided at the bottom of the tank body 18.

[0007] The pressure distribution system includes an upper pressure distribution plate 6 disposed on the top surface of the barrel 18, a lower pressure distribution plate 5 disposed directly below the upper pressure distribution plate 6 with its edge fixedly connected to the inner wall of the barrel 18, the upper pressure distribution plate 6 and the lower pressure distribution plate 5 being parallel and horizontally disposed, a slurry inlet device disposed below the edge of the lower pressure distribution plate 5, a cone-shaped top cap 7 disposed directly above the upper pressure distribution plate 6, a hollow inner pressure distribution cone 8 fixedly disposed at the center of the upper pressure distribution plate 6, a pressure supply port 9 disposed at the top of the top cap 7, the pressure supply port 9 being located directly above the center of the upper pressure distribution plate 6, the pressure supply port 9 being connected to a pressure supply system, a number of pressure stabilizing holes 15 evenly disposed on the lower pressure distribution plate 5, a number of pressure distribution holes 14 evenly disposed on the upper pressure distribution plate 6, and a number of horizontal flow holes 13 evenly disposed on the side wall of the inner pressure distribution cone 8.

[0008] Preferably, the horizontal flow hole 13, the pressure dividing hole 14, and the pressure stabilizing hole 15 are all vertical holes.

[0009]

[0010] The taper of both the top cap 7 and the inner pressure-dividing cone 8 is 45°, and the base radius of the inner pressure-dividing cone 8 is the top...

[0011] The diameter of the pressure dividing hole 14 is twice that of the diameter of the advection hole 13. The diameter of pressure dividing hole 14 is times that of pressure stabilizing hole 15. Times; where assuming the bottom radius of the top cap 7 is a, then the upper pressure plate 6 and the lower pressure plate

[0012] A certain amount of space is needed for convection buffering to reduce the impact force on the lower pressure distribution plate 5, and its airflow chamber ultimately plays a role in depressurization; while the base radius of the inner pressure distribution cone 8 is... Its design effectively disperses the airflow column from the pressure supply port 9 into the sloping channel formed by the generatrix of the top cap 7 and the inner pressure-distributing cone 8; while the height of the pressure-stabilizing hole 15 is Its height is designed to direct the air column in the air chamber into a channel perpendicular to the slurry surface; this distance helps to unify the direction of the air column to vertically downwards; and the diameter of the pressure dividing hole 14 is the same as the diameter of the horizontal flow hole 13. The design is such that the area of ​​the flow-distributing orifice 13 is times that of the pressure-distributing orifice 14. To effectively disperse the air column from the pressure supply port 9, the horizontal flow orifice 13 must be relatively small to allow the slope of the internal pressure-distributing cone 8 to change the direction of the air column; while the diameter of the pressure-distributing orifice 14 is [missing information] and the diameter of the pressure-stabilizing orifice 15 is [missing information]. The area of ​​the pressure dividing hole 14 is 4 to 5 times that of the pressure stabilizing hole 15. Its design is to further disperse the air column in the airflow chamber into multiple small air columns.

[0013] The pressure-dividing system divides the air pressure column from the pressure supply system, dispersing it into multiple air pressure columns along the direction of the cone's generatrix, thus achieving the first pressure division and diversion of the grouting pressure. Since the inner pressure-dividing cone 8 is a hollow cone structure with numerous horizontal flow holes 13 distributed on its cone surface, and its axial section has a base angle of 45° and a apex angle of 90°, when the airflow perpendicular to the upper pressure-dividing plate 6 exits from the pressure supply port 9, it encounters a 45° slope and is decomposed into airflow along the slope and airflow vertically downwards. These two airflows are of equal magnitude, thus achieving the second pressure division and diversion of the grouting pressure. The upper pressure-dividing plate 6 is provided with multiple pressure-dividing holes 14, and the lower pressure-dividing plate 5 is provided with multiple pressure-stabilizing holes 15, but the diameter of the pressure-dividing holes 14 is smaller than that of the pressure-stabilizing holes 15. The pressure stabilizing hole 15 has a hollow cylindrical structure, which further disperses the diverted air column into many small air columns perpendicular to the lower pressure plate 5, so as to ensure that the pressure distribution formed by more air columns is more uniform, and realize the third pressure division and diversion of grouting pressure, thereby achieving the purpose of making the grouting pressure surface parallel to the grout surface.

[0014] The pressure supply port 9 is located directly above the center of the upper pressure plate 6, which ensures that the air pressure column flowing out of the pressure supply port 9 is directly above the center of the slurry surface.

[0015] The pressure supply system includes a pressure inlet pipe 12 connected to the pressure distribution system. A pressure gauge 10 is installed on the pressure inlet pipe 12, and a pressure inlet ball valve 11 is installed inside the pressure inlet pipe 12. The pressure inlet ball valve 11 controls the closure of the pressure inlet pipe, and the pressure gauge 10 can adjust the air pressure inside the pressure inlet pipe 12.

[0016] The slurry feeding device includes a slurry feeding pipe 1, a slurry inlet 16 is provided at the top of the tank body 18, the slurry inlet 16 is located below the pressure distribution system, the slurry feeding pipe 1 is connected to the slurry inlet 16, a slurry feeding filter screen 2 is provided at the front end of the slurry feeding pipe 1, a slurry feeding ball valve 3 is provided inside the slurry feeding pipe 1, a slurry feeding flow meter 4 is provided on the slurry feeding pipe 1, the slurry feeding ball valve 3 is located between the slurry feeding filter screen 2 and the slurry feeding flow meter 4, and the slurry feeding flow meter 4 is close to the slurry inlet 16 of the tank body 18;

[0017] The grout inlet filter 2 can filter out coarse particles in the grout to prevent blockage of the grouting pipeline in the later stage. The grout inlet ball valve 3 controls the grout inlet channel closure. The grout inlet flow meter 4 can monitor the total amount of grout entering the grout storage device in real time.

[0018] Preferably, the top of the tank body 18 is provided with a pressure relief valve 17 opposite to the grout inlet 16. After the grouting project is completed, the pressure relief valve 17 can safely release the remaining air pressure in the grout storage tank. When the air pressure in the grout storage tank is too high during the grouting project, the pressure relief valve 17 can safely adjust the air pressure to avoid an explosion accident.

[0019] The bottom of the base box 24 is provided with a roller I 33 on one side and a roller II 34 opposite to roller I 33 on the other side; roller I 33 and roller II 34 can facilitate the movement of the slurry storage device.

[0020] The stirring system includes a motor I 25 and a motor II 26 fixedly installed inside the base housing 24. The output shafts of both motor I 25 and motor II 26 are vertically upward. A rotating shaft I 19 is fixedly installed at the top of the output shaft of motor I 25, and a rotating shaft II 20 is fixedly installed at the top of the output shaft of motor II 26. Both rotating shafts I 19 and rotating shaft II 20 pass vertically upward through the bottom plate of the tank 18. A sealing ring I is provided at the junction of rotating shaft I 19 and the bottom plate of the tank 18, and a sealing ring II is provided at the junction of rotating shaft II 20 and the bottom plate of the tank 18. Rotating shaft I 19 can rotate within sealing ring I, and rotating shaft II 20 can rotate within sealing ring II. Several layers of stirring blades I 21 are fixedly installed on rotating shaft I 19, and several layers of stirring blades II are fixedly installed on rotating shaft II 20. The stirring blades I 21 and stirring blades II are alternately arranged in the vertical direction. Their design shares a semicircle in space, which increases the rotation area of ​​the blades, helps to fully stir the slurry, and reduces blade wear.

[0021] The stirring radius of both stirring blade I21 and stirring blade II is 30-32% of the barrel diameter. The design divides the barrel diameter into three middle sections totaling 90-96%, and two sections on both sides, each with a gap of 2-5%, in order to avoid frictional wear between the blades and the inner wall of the barrel.

[0022] The mixing system uses motor I25 and motor II26 to drive the alternating mixing blades I21 and II to rotate in the same direction, stirring the grout and preventing grout segregation, which could lead to solid-liquid separation and affect the grouting effect and strength.

[0023] The temperature control system includes a heating device fixedly installed on the top of the base box 24. The heating device includes several heaters 26 evenly distributed on the bottom surface of the bottom plate of the barrel 18, a temperature sensor 22 installed at the bottom of the barrel 18, and a temperature controller 23 fixedly installed on the outer wall of the bottom box 24. The probe of the temperature sensor 22 is inserted into the barrel 18. The temperature sensor 22 and the temperature controller 23 are electrically connected. The heaters 26 are connected in parallel and electrically connected to the temperature controller 23.

[0024] Temperature sensor 22 monitors the temperature of the grout in the tank in real time. When the temperature is lower than the preset temperature, temperature controller 23 controls some or all of the heaters 26 of the heating device to work based on the temperature difference between the preset temperature and the actual temperature of the grout, thereby heating the grout in the tank. When the temperature is higher than the preset temperature, temperature controller 23 controls some or all of the heaters 26 of the heating device to stop working based on the temperature difference between the preset temperature and the actual temperature of the grout, and the grout in the tank cools down slightly to the preset temperature, thereby achieving heating and heat preservation of the grout in the tank and avoiding the problem of the grout freezing in the tank or freezing in the grout outlet pipe during grouting in glacial geology, which would prevent grouting operations from being carried out.

[0025] The slurry discharge device includes a slurry discharge pipe 32, a slurry discharge port 28 is provided at the bottom of the tank body 18, the slurry discharge pipe 32 is connected to the slurry discharge port 28, a slurry discharge pressure gauge 29 and a slurry discharge flow meter 30 are provided on the slurry discharge pipe 32, and a slurry discharge ball valve 31 is provided inside the slurry discharge pipe 32.

[0026] The beneficial effects of this invention are:

[0027] (1) This invention divides the airflow in the pressure inlet pipe into three pressures through a pressure-dividing system. The first pressure division disperses the grouting air column through a mathematical cone structure. The second pressure division uses the principle of physical force decomposition and effectively divides the grouting airflow into two streams of equal size but different directions through a special internal structure design, thereby achieving precise control of the grouting pressure. The third pressure division unifies the flow direction and disperses the size of the air column after the second division. Through the three pressure divisions, the problem of the grouting pressure surface and the grout surface not being parallel inside the existing grout storage device is completely solved, thereby achieving more precise control of the grouting pressure, enhancing the control requirements of the grouting effect and reducing the loss of grout during the grouting process.

[0028] (2) The stirring system of the present invention solves the problem of segregation of slurry in the storage device due to stillness during long grouting time and accelerates the uniform heating of slurry, preventing the aggregation and sedimentation of solid particles in slurry, thereby ensuring the maintenance of slurry characteristics and stable temperature, achieving the expected grouting effect, and avoiding the risk of clogging of grouting pipeline due to slurry segregation and sedimentation.

[0029] (3) The temperature control system of the present invention solves the problem of freezing of grout in the grouting pipeline during the grouting process in the southeastern Tibetan region due to the low winter temperature and glacial moraine geological grouting, which prevents the grouting operation from being carried out. At the same time, it adapts to the grouting project requirements where some grouts need to be at a predetermined temperature to have the corresponding physical properties, thereby improving the grouting effect and grouting efficiency.

[0030] (4) The present invention realizes a multifunctional mobile grout storage function with uniform grouting pressure distribution, prevention of grout segregation, adjustable grout temperature, and real-time monitoring of grouting parameters. Attached Figure Description

[0031] Figure 1 A schematic diagram of a pressure equalization and grout storage device used for grouting in glacial till geological conditions;

[0032] Figure 2 This is a schematic diagram and front view of the three-dimensional structure of the voltage divider system;

[0033] Figure 3 This is a schematic diagram and front view of the internal pressure cone structure;

[0034] Figure 4 This is a schematic diagram illustrating the voltage divider principle of a voltage divider system.

[0035] Figure 5 This is a schematic diagram of the heater structure;

[0036] In the diagram, 1-Inlet pipe, 2-Inlet filter, 3-Inlet ball valve, 4-Inlet flow meter, 5-Lower pressure plate, 6-Upper pressure plate, 7-Top cap, 8-Inner pressure cone, 9-Pressure supply port, 10-Pressure gauge, 11-Inlet ball valve, 12-Inlet pipe, 13-Horizontal flow hole, 14-Pressure distribution hole, 15-Pressure stabilizing hole, 16-Inlet, 17-Pressure relief valve, 18-Barrel body, 19-Shaft I, 20-Shaft II, 21-Agitator blade I, 22-Temperature sensor, 23-Temperature controller, 24-Base box, 25-Motor I, 27-Motor II, 26-Heater, 28-Outlet, 29-Outlet pressure gauge, 30-Outlet flow meter, 31-Outlet ball valve, 32-Outlet pipe, 33-Roller I, 34-Roller II. Detailed Implementation

[0037] The present invention will be further described below with reference to specific embodiments.

[0038] Example 1: As Figure 1 As shown, a pressure equalization and storage device for grouting in glacial till geological conditions includes a tank body 18. A pressure distribution system is provided at the top of the tank body 18, and a pressure supply system is connected to the external pressure distribution system. A grout inlet device communicating with the inside of the tank body 18 is provided below the pressure distribution system. A stirring system is vertically provided inside the tank body 18. The tank body 18 is fixedly mounted on a base box 24. A temperature control system is fixedly provided on the outer bottom surface of the tank body 18. A grout discharge device communicating with the inside of the tank body 18 is provided at the bottom of the tank body 18.

[0039] The pressure-dividing system divides the airflow in the injection pipeline into three pressures and streams, solving the problem of the grouting pressure surface and grout surface not being parallel inside the grout storage tank, thereby achieving precise control of the grouting pressure and ensuring the grouting effect. The mixing system solves the problem of grout segregation during long-term grouting, preventing solid-liquid separation of the grout and avoiding blockage of the grouting pipeline. The temperature control system can adjust the grout temperature, solving the problem of grout freezing during grouting in glacial till geology in extremely cold regions. The pressure-equalizing grout storage device can achieve precise control of the grouting pressure, prevent the sedimentation of solid particles in the grout, and regulate the grout temperature, solving the problem of grout segregation and solid-liquid separation that occurs in traditional devices, affecting the grouting effect and strength.

[0040] Example 2: The pressure equalization slurry storage device used for grouting in glacial till geology in this example is basically the same as the pressure equalization slurry storage device used for grouting in glacial till geology in Example 1, except that: Figure 2-4As shown, the pressure distribution system includes an upper pressure distribution plate 6 set on the top surface of the barrel 18, a lower pressure distribution plate 5 set directly below the upper pressure distribution plate 6 with its edge fixedly connected to the inner wall of the barrel 18, the upper pressure distribution plate 6 and the lower pressure distribution plate 5 are parallel and horizontally set, the slurry inlet device is set below the edge of the lower pressure distribution plate 5, a cone-shaped top cap 7 is set directly above the upper pressure distribution plate 6, a hollow inner pressure distribution cone 8 is fixedly set at the center of the upper pressure distribution plate 6, a pressure supply port 9 is opened at the top of the top cap 7, the pressure supply port 9 is located directly above the center of the upper pressure distribution plate 6, the pressure supply port 9 is connected to the external pressure supply system, a number of pressure stabilizing holes 15 are evenly opened on the lower pressure distribution plate 5, a number of pressure distribution holes 14 are evenly opened on the upper pressure distribution plate 6, and a number of horizontal flow holes 13 are evenly opened on the side wall of the inner pressure distribution cone 8.

[0041] The horizontal flow hole 13, the pressure dividing hole 14, and the pressure stabilizing hole 15 are all vertical holes;

[0042] The distance between the upper pressure plate 6 and the lower pressure plate 5 is equal to the height of the inner pressure cone 8. The taper of both the top cap 7 and the inner pressure-dividing cone 8 is 45°, and the base radius of the inner pressure-dividing cone 8 is [amount missing] times the base radius of the top cap 7. The height of the stabilizing hole 15 in the lower pressure plate 5 is equal to the bottom radius of the top cap 7. The diameter of the pressure dividing hole 14 is twice that of the diameter of the advection hole 13. The diameter of pressure dividing hole 14 is times that of pressure stabilizing hole 15. Times; where, assuming the bottom radius of the top cap 7 is a, then the distance between the upper pressure plate 6 and the lower pressure plate 5 is An airflow chamber is formed. Since the air columns flowing out from the upper pressure plate 6 are not uniform in direction, a certain space is needed for convection buffering to reduce the impact force on the lower pressure plate 5. The airflow chamber ultimately plays a role in depressurization; while the base radius of the inner pressure cone 8 is... Its design effectively disperses the airflow column from the pressure supply port 9 into the sloping channel formed by the generatrix of the top cap 7 and the inner pressure-distributing cone 8; while the height of the pressure-stabilizing hole 15 is Its height is designed to direct the air column in the air chamber into a channel perpendicular to the slurry surface; this distance helps to unify the direction of the air column to vertically downwards; and the diameter of the pressure dividing hole 14 is the same as the diameter of the horizontal flow hole 13. The design is such that the area of ​​the flow-distributing orifice 13 is times that of the pressure-distributing orifice 14. To effectively disperse the air column from the pressure supply port 9, the horizontal flow orifice 13 must be relatively small to allow the slope of the internal pressure-distributing cone 8 to change the direction of the air column; while the diameter of the pressure-distributing orifice 14 is [missing information] and the diameter of the pressure-stabilizing orifice 15 is [missing information]. The area of ​​the pressure dividing hole 14 is 4 to 5 times that of the pressure stabilizing hole 15. Its design is to further disperse the air column in the airflow chamber into multiple small air columns.

[0043] Because both the top cap 7 and the inner pressure-distributing cone 8 in the pressure-distributing system are conical structures, with a base angle of 45° and a apex angle of 90°, the initially concentrated coarse air pressure column in the pressure supply port 9 is initially dispersed into multiple smaller air pressure columns along the direction of the cone's generatrix, thus achieving the first pressure distribution and diversion of the grouting pressure; for example... Figure 3 As shown, the inner pressure-distributing cone 8 is a hollow cone with many advection holes 13 distributed on its cone surface. The base angle of the cone's axial section is 45°, so the inner slope formed by its cone surface and the upper pressure-distributing plate 6 is 45°. Its design applies the principle of force decomposition in physics, such as... Figure 4 As shown, the X-axis runs along the slope, and the Y-axis runs perpendicular to the slope. When the airflow column F1, perpendicular to the upper pressure plate 6, exits from the pressure supply port 9, the airflow encounters the inner pressure cone 8. Because the conical surface of the inner pressure cone 8 has a 45° slope, the vertically downward airflow F1 is decomposed into airflow F in the opposite direction along the X-axis. x and the airflow F in the opposite direction of the Y-axis y Its F x =F1cos45°, F y =F1sin45°, that is, F x =F y This achieves the division of the large air column from the pressure supply port 9 into smaller air columns of equal size but different directions, thus realizing the second pressure division and diversion of the grouting pressure; for example... Figure 2 and Figure 4 As shown, the lower pressure distribution plate 5 is provided with multiple pressure stabilizing holes 15. The pressure stabilizing holes 15 are cylindrical structures without a top or bottom. The airflow column coming out of the pressure distribution hole 14 of the upper pressure distribution plate 6 is uniformly directed after passing through the hollow cylinder. The diameter of the pressure distribution hole 14 is twice that of the pressure stabilizing hole 15. The air column after diversion is further dispersed into more small air columns perpendicular to the lower pressure distribution plate 5, thus realizing the third pressure division and diversion of the grouting pressure. The pressure distribution system has dispersed the coarse air pressure column that initially came out of the pressure supply port 9 into multiple uniform small air columns perpendicular to the grout surface after three pressure divisions and diversions, thus achieving the purpose of making the grouting pressure surface parallel to the grout surface and the pressure distribution more uniform.

[0044] The pressure supply port 9 is located directly above the center of the upper pressure plate 6, which ensures that the air pressure column flowing out of the pressure supply port 9 is directly above the center of the slurry surface.

[0045] Example 3: The pressure equalization slurry storage device used for grouting in glacial till geology in this example is basically the same as the pressure equalization slurry storage device used for grouting in glacial till geology in Example 2, except that: the slurry inlet device includes a slurry inlet pipe 1, a slurry inlet 16 is provided at the top of the tank 18, the slurry inlet 16 is located below the pressure distribution system, the slurry inlet pipe 1 is connected to the slurry inlet 16, a slurry inlet filter screen 2 is provided at the front end of the slurry inlet pipe 1, a slurry inlet ball valve 3 is provided inside the slurry inlet pipe 1, a slurry inlet flow meter 4 is provided on the slurry inlet pipe 1, the slurry inlet ball valve 3 is located between the slurry inlet filter screen 2 and the slurry inlet flow meter 4, and the slurry inlet flow meter 4 is close to the slurry inlet 16 of the tank 18 (see Figure 1 );

[0046] The grout inlet filter 2 can filter out coarse particles in the grout to prevent blockage of the grouting pipeline in the later stage. The grout inlet ball valve 3 controls the grout inlet channel closure. The grout inlet flow meter 4 can monitor the total amount of grout entering the grout storage device in real time.

[0047] Example 4: The pressure equalization and storage device for grouting in glacial till geology in this example is basically the same as the pressure equalization and storage device for grouting in glacial till geology in Example 3, except that: the stirring system includes motor I 25 and motor II 26 fixedly installed in the base box 24. The output shafts of motor I 25 and motor II 26 are both vertically upward. A rotating shaft I 19 is fixedly installed at the top of the output shaft of motor I 25, and a rotating shaft II 20 is fixedly installed at the top of the output shaft of motor II 26. Both rotating shafts I 19 and rotating shaft II 20 pass vertically upward through the bottom plate of the tank 18. A sealing ring I is provided at the junction of shaft I 19 and the bottom plate of barrel 18, and a sealing ring II is provided at the junction of shaft II 20 and the bottom plate of barrel 18. Shaft I 19 can rotate within sealing ring I, and shaft II 20 can rotate within sealing ring II. Several layers of stirring blades I 21 are fixedly installed on shaft I 19, and several layers of stirring blades II are fixedly installed on shaft II 20. The stirring blades I 21 and stirring blades II are alternately arranged in the vertical direction. Their design shares a semicircle in space, which makes the blade rotation area larger, which helps to fully stir the slurry and reduces blade wear.

[0048] The stirring radius of both stirring blade I21 and stirring blade II is 30-32% of the barrel diameter. The design divides the barrel diameter into three middle sections totaling 90-96%, and two sections on both sides, each with a gap of 2-5%, in order to avoid frictional wear between the blades and the inner wall of the barrel.

[0049] The mixing system uses motor I25 and motor II26 to drive the alternating mixing blades I21 and II to rotate in the same direction, stirring the grout and preventing grout segregation, which could lead to solid-liquid separation and affect the grouting effect and strength.

[0050] Example 5: The pressure equalization and storage device for grouting in glacial till geology in this example is basically the same as the pressure equalization and storage device for grouting in glacial till geology in Example 4, except that: the temperature control system includes a heating device fixedly installed on the top of the base box 24. The heating device includes several heaters 26 evenly distributed on the bottom surface of the bottom plate of the barrel 18, a temperature sensor 22 installed at the bottom of the barrel 18, and a temperature controller 23 fixedly installed on the outer wall of the bottom box 24. The probe of the temperature sensor 22 is inserted into the barrel 18. The temperature sensor 22 and the temperature controller 23 are electrically connected. The heaters 26 are connected in parallel and then electrically connected to the temperature controller 23 (see...). Figure 1 The structure of heater 26 is shown below. Figure 5 ;

[0051] Temperature sensor 22 monitors the temperature of the grout in the tank in real time. When the temperature is lower than the preset temperature, temperature controller 23 controls some or all of the heaters 26 of the heating device to work based on the temperature difference between the preset temperature and the actual temperature of the grout, thereby heating the grout in the tank. When the temperature is higher than the preset temperature, temperature controller 23 controls some or all of the heaters 26 of the heating device to stop working based on the temperature difference between the preset temperature and the actual temperature of the grout, and the grout in the tank cools down slightly to the preset temperature, thereby achieving heating and heat preservation of the grout in the tank and avoiding the problem of the grout freezing in the tank or freezing in the grout outlet pipe during grouting in glacial geology, which would prevent grouting operations from being carried out.

[0052] Example 6: The pressure equalization and storage device for grouting in glacial till geology in this example is basically the same as the pressure equalization and storage device for grouting in glacial till geology in Example 5, except that: the grout discharge device includes a grout discharge pipe 32, and a grout discharge port 28 is opened at the bottom of the tank 18. The grout discharge pipe 32 is connected to the grout discharge port 28. A grout discharge pressure gauge 29 and a grout discharge flow meter 30 are installed on the grout discharge pipe 32. A grout discharge ball valve 31 is installed inside the grout discharge pipe 32. The grout discharge pressure gauge 29 can record and regulate the output pressure of the grout, the grout discharge flow meter 30 can monitor the grout discharge flow rate in real time, and the grout discharge ball valve 31 controls the closure of the grout discharge pipe.

[0053] Example 7: The pressure equalization slurry storage device used for grouting in glacial till geology in this example is basically the same as the pressure equalization slurry storage device used for grouting in glacial till geology in Example 6. The difference is that: a pressure relief valve 17 is provided on the top of the tank 18, which is opposite to the slurry inlet 16. After the grouting project is completed, the pressure relief valve 17 can safely release the remaining air pressure in the slurry storage tank; when the air pressure in the slurry storage tank is too high during the grouting project, the air pressure can be safely adjusted through the pressure relief valve 17 to avoid an explosion accident.

[0054] The bottom of the base box 24 is provided with a roller I 33 on one side and a roller II 34 opposite to roller I 33 on the other side; roller I 33 and roller II 34 can facilitate the movement of the slurry storage device.

[0055] The specific steps for using a pressure equalization and grout storage device for grouting in glacial till are as follows:

[0056] (1) Before grouting begins, the grout inlet ball valve 3, the pressure inlet ball valve 11, the grout outlet ball valve 31, and the pressure relief valve 17 must be closed; the grout inlet pipeline 1 is connected to the external grout supply pipeline, the pressure inlet pipeline 12 is connected to the external pressure supply pipeline, and the grout outlet pipeline 32 is connected to the external grout outlet pipeline. Check that each component is intact.

[0057] (2) Open the grout ball valve 3 and use the external grout pump to pump grout into the grout storage device. Observe the data of the grout flow meter 4. When the required amount of grout for the grouting project is reached, close the grout ball valve 3 and stop grouting. The mixing system starts mixing to prevent grout segregation and solid particle precipitation.

[0058] (3) At the same time, the required temperature of the grout is set by the temperature controller, and the temperature sensor 22 monitors the temperature of the grout in the barrel in real time. When the temperature is lower than the preset temperature, the temperature controller 23 controls some or all of the heaters 26 of the heating device to work according to the temperature difference between the preset temperature and the actual temperature of the grout, so as to heat up the grout in the barrel. When the temperature is higher than the preset temperature, the temperature controller 23 controls some or all of the heaters 26 of the heating device to stop working according to the temperature difference between the preset temperature and the actual temperature of the grout, so that the grout in the barrel is slightly cooled down to the preset temperature, thereby achieving the heating and heat preservation of the grout in the barrel, avoiding the problem of the grout freezing in the barrel or the grout freezing in the outlet pipe during the grouting process in glacial geology, which would prevent the grouting operation from being carried out.

[0059] (4) Open the inlet ball valve 11 and use the external pressure supply device to supply pressure to the slurry storage device. Observe the data of pressure gauge 10 and slurry outlet pressure gauge 29. When the required grouting pressure is reached, open the slurry outlet ball valve 31 to start grouting.

[0060] (5) Observe the data of the grout flow meter 30 during grouting. When the required grouting volume is reached, first close the inlet ball valve 11 to stop the inlet pressure, then close the outlet ball valve 31 to stop the outlet grout, and then open the pressure relief valve 17 to release the excess air pressure in the grout storage device.

[0061] (6) After each grouting, the grout storage device must be cleaned, the grout is replaced with tap water, and the above steps are repeated to clean the grout storage device multiple times. After cleaning, the power is turned off and the connection with the external grout supply equipment, pressure supply equipment and grout discharge equipment is disconnected.

[0062] The specific embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A pressure-equalizing grout storage device for grouting in glacial till geological formations, characterized in that: Includes a barrel (18), a pressure distribution system is provided on the top of the barrel (18), the pressure distribution system is connected to an external pressure supply system, a slurry feeding device is provided below the pressure distribution system and communicates with the inside of the barrel (18), a stirring system is vertically provided inside the barrel (18), the barrel (18) is fixedly installed on the base box (24), a temperature control system is fixedly installed on the outer bottom surface of the barrel (18), and a slurry discharge device is provided at the bottom of the barrel (18) and communicates with the inside of the barrel (18). The pressure distribution system includes an upper pressure distribution plate (6) set on the top surface of the barrel (18), a lower pressure distribution plate (5) with its edge fixedly connected to the inner wall of the barrel (18) and located directly below the upper pressure distribution plate (6), the upper pressure distribution plate (6) and the lower pressure distribution plate (5) being parallel and horizontally arranged, the slurry inlet device being located below the edge of the lower pressure distribution plate (5), a cone-shaped top cap (7) being set directly above the upper pressure distribution plate (6), and a hollow inner pressure distribution cone (8) being fixedly set at the center of the upper pressure distribution plate (6). The top of the cap (7) is provided with a pressure port (9), which is located directly above the center of the upper pressure plate (6). The pressure port (9) is connected to the external pressure supply system. Several pressure stabilizing holes (15) are evenly provided on the lower pressure plate (5), and several pressure dividing holes (14) are evenly provided on the upper pressure plate (6). Several horizontal flow holes (13) are evenly provided on the side wall of the inner pressure dividing cone (8). The horizontal flow holes (13), pressure dividing holes (14) and pressure stabilizing holes (15) are all vertical holes. The taper of both the top cap (7) and the inner pressure cone (8) is 45°.

2. The pressure equalization and grout storage device for grouting in glacial tillage as described in claim 1, characterized in that: The distance between the upper pressure plate (6) and the lower pressure plate (5) is equal to the height of the inner pressure cone (8). The radius of the base of the inner pressure cone (8) is times that of the radius of the base of the cap (7). The height of the stabilizing hole (15) in the lower pressure plate (5) is times the radius of the bottom surface of the top cap (7). The diameter of the pressure dividing hole (14) is twice that of the diameter of the flow diversion hole (13). The diameter of the pressure dividing hole (14) is 2 times that of the pressure stabilizing hole (15). times.

3. The pressure equalization and grout storage device for grouting in glacial till geological conditions according to claim 1, characterized in that: The pressure supply system includes a pressure inlet pipe (12) connected to the pressure distribution system. A pressure gauge (10) is installed on the pressure inlet pipe (12), and a pressure inlet ball valve (11) is installed inside the pressure inlet pipe (12).

4. The pressure equalization and grout storage device for grouting in glacial tillage as described in claim 1, characterized in that: The slurry feeding device includes a slurry feeding pipe (1), a slurry inlet (16) is provided on the top of the tank (18), the slurry inlet (16) is located below the pressure distribution system, the slurry feeding pipe (1) is connected to the slurry inlet (16), a slurry feeding filter (2) is provided at the front end of the slurry feeding pipe (1), a slurry feeding ball valve (3) is provided inside the slurry feeding pipe (1), a slurry feeding flow meter (4) is provided on the slurry feeding pipe (1), the slurry feeding ball valve (3) is located between the slurry feeding filter (2) and the slurry feeding flow meter (4), and the slurry feeding flow meter (4) is close to the slurry inlet (16) of the tank (18).

5. The pressure equalization and grout storage device for grouting in glacial tillage as described in claim 4, characterized in that: The top of the barrel (18) is provided with a pressure relief valve (17) opposite to the slurry inlet (16), and the bottom of the base box (24) is provided with a roller I (33) on one side and a roller II (34) opposite to the roller I (33) on the other side.

6. The pressure equalization and grout storage device for grouting in glacial till geological conditions according to claim 1, characterized in that: The stirring system includes motor I (25) and motor II (27) fixedly installed in the base housing (24). The output shafts of motor I (25) and motor II (27) are both vertically upward. A rotating shaft I (19) is fixedly installed at the top of the output shaft of motor I (25), and a rotating shaft II (20) is fixedly installed at the top of the output shaft of motor II (27). Both rotating shaft I (19) and rotating shaft II (20) pass vertically upward through the bottom plate of the tank (18). The rotating shaft I (19) and the rotating shaft II (20) are connected to the bottom plate of the tank (18). A sealing ring I is provided at the bottom plate joint of the barrel (18), and a sealing ring II is provided at the bottom plate joint of the rotating shaft II (20) and the barrel (18). The rotating shaft I (19) can rotate within the sealing ring I, and the rotating shaft II (20) can rotate within the sealing ring II. Several layers of stirring blades I (21) are fixedly provided on the rotating shaft I (19), and several layers of stirring blades II are fixedly provided on the rotating shaft II (20). The stirring blades I (21) and the stirring blades II are alternately arranged in the vertical direction.

7. The pressure equalization and grout storage device for grouting in glacial till geological conditions according to claim 1, characterized in that: The temperature control system includes a heating device fixedly installed on the top of the base box (24). The heating device includes several heaters (26) evenly distributed on the bottom surface of the bottom plate of the barrel (18), a temperature sensor (22) installed at the bottom of the barrel (18), and a temperature controller (23) fixedly installed on the outer wall of the base box (24). The probe of the temperature sensor (22) is inserted into the barrel (18). The temperature sensor (22) and the temperature controller (23) are electrically connected. The heaters (26) are connected in parallel and electrically connected to the temperature controller (23).

8. The pressure equalization and grout storage device for grouting in glacial till geological conditions according to claim 1, characterized in that: The slurry discharge device includes a slurry discharge pipe (32), a slurry outlet (28) is provided at the bottom of the tank (18), the slurry discharge pipe (32) is connected to the slurry outlet (28), a slurry discharge pressure gauge (29) and a slurry discharge flow meter (30) are provided on the slurry discharge pipe (32), and a slurry discharge ball valve (31) is provided inside the slurry discharge pipe (32).

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