A grouting device and method for tunnel construction

Abstract

The application belongs to the technical field of construction instruments, and particularly relates to a tunnel construction grouting device and method. Through the arrangement of the stirring mechanism and the pressure stabilizing mechanism, the tunnel grouting construction can meet the environmental conditions of the tunnel, the pulp is prepared for the construction point, and then grouting is carried out. The stirring mechanism can provide the pulp stirring function, and also can play the effect of auxiliary stirring and screening materials, so that the pulp preparation effect and quality are improved to meet the construction needs. The arrangement of the pressure stabilizing mechanism can play the role of synchronizing the air pressure strength in the pulp preparation tank, improve the sealing effect of the pulp preparation tank, and further meet the needs of stable pulp feeding.

Description

Technical Field

[0001] This invention belongs to the field of construction equipment technology, specifically relating to a grouting device and method for tunnel construction. Background Technology

[0002] Grouting refers to the method of injecting certain solidifiable grouts into cracks or pores in rock and soil foundations to improve their physical and mechanical properties. The purpose of grouting is to prevent seepage, plug leaks, reinforce and correct the tilt of buildings. In tunnel construction, in order to ensure the support strength of the tunnel, grouting is often carried out on the tunnel walls and ground during construction.

[0003] Currently, the commonly used grouting construction method usually involves using appropriate engineering vehicles to prepare the grout, which is then delivered to the designated construction point inside the tunnel. However, due to the complex construction environment inside the tunnel, it is inconvenient for conventional large engineering vehicles to enter and exit. Furthermore, extracting the grout separately for grouting presents problems such as cumbersome material transfer and difficulty in controlling the pumping rate. Therefore, this method does not meet the current needs of tunnel construction. Summary of the Invention

[0004] The purpose of this invention is to provide a grouting device and method for tunnel construction, in order to solve the problems existing in the prior art.

[0005] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows:

[0006] A grouting device for tunnel construction includes a mobile vehicle, an air compressor, a grouting tank, and a control panel. The air outlet of the air compressor is connected to the grouting tank, and the grouting tank is equipped with a stirring mechanism and a pressure stabilizing mechanism.

[0007] The stirring mechanism includes a transmission assembly, a stirrer, and an auxiliary assembly. The transmission assembly is located at the lower end of the pulping tank, the stirrer is located inside the pulping tank and is connected to the transmission assembly in a driving manner, and the auxiliary assembly is located on the upper side inside the pulping tank and is matched with the stirrer.

[0008] The pulping tank includes a tank body and a tank cover. The tank cover is connected to the tank body by a positioning pin. The tank cover is provided with an air inlet valve and is connected to the air outlet of the air compressor. The pressure stabilizing mechanism is located on the tank cover and is connected and matched with the tank body. The pressure stabilizing mechanism includes a sealing body and an adaptive seal. The sealing body is spaced apart in the positioning holes of the tank body that match the positioning pin. The sealing body is connected and matched with the positioning pin. There are two adaptive seals, which are spaced apart on the tank body relative to the positioning holes. The adaptive seals are connected and matched with the sealing body.

[0009] The transmission assembly includes a motor, a transmission wheel, a driven wheel, and a transmission belt. The motor is fixedly mounted on the outside of the pulping tank. The transmission wheel is fixedly connected to the output shaft of the motor. The driven wheel is rotatably mounted at the lower end of the pulping tank and is connected to the agitator. The transmission belt is located between the transmission wheel and the driven wheel.

[0010] The agitator includes a main shaft and agitator blades. The agitator blades are a number and are evenly distributed on the main shaft. The main shaft is rotatably disposed inside the pulping tank and is connected to the driven wheel via a transmission.

[0011] The auxiliary components include an auxiliary agitator and an auxiliary screener. The auxiliary agitator includes a connecting ring and several telescopic agitators. The slurry tank is provided with a support platform connected to the connecting ring by bolts. Several telescopic agitators are evenly arranged at the lower end of the connecting ring. Each telescopic agitator includes an elastic telescopic rod and several pusher plates. The elastic telescopic rod is fixedly connected to the lower end of the connecting ring. Several pusher plates are evenly arranged in the telescopic section of the elastic telescopic rod. The agitator blades are also inclined from top to bottom and have pusher plates that match the elastic telescopic rod.

[0012] The auxiliary screening device includes a screening frame, a homogenizing fan, and a transmission rod. The screening frame is located at the upper end of the connecting ring, the homogenizing fan is rotatably located within the screening frame, the transmission rod is drivingly connected to the homogenizing fan and slidingly connected to the main shaft, and the transmission rod has a polygonal structure.

[0013] The sealing body has a sealing cavity in the middle that matches the alignment hole. The sealing body also has a U-shaped double-pass groove that communicates with the sealing cavity. The U-shaped double-pass groove is connected and matched with the adaptive sealer. The alignment pin corresponding to the sealing body also has a venting groove that communicates with the inner side of the can lid.

[0014] The adaptive seal includes a floating ring and springs. The vertical cross-section of the floating ring is T-shaped. The number of springs is several and they are evenly distributed at the right-angle ends of the floating ring. The slurry tank has a stepped cavity that communicates with the U-shaped double-channel groove. The floating ring is slidably sealed in the stepped cavity.

[0015] Before pulping, the equipment is moved to a suitable construction location by a mobile vehicle. Then, the pulping raw materials are injected into the pulping tank and stirred by a mixing mechanism. After pulping is completed, the pulping tank can be sealed, and the air pressure inside the pulping tank is increased by an air compressor to pump the pulp out and inject it into the construction point. The auxiliary components can improve the pulping effect and screen the raw materials during pulping to meet the construction needs. Furthermore, the adaptive sealer can synchronize with the air pressure inside the pulping tank to achieve a more effective sealing effect.

[0016] The present invention has at least the following advantages compared to the prior art:

[0017] By incorporating a mixing mechanism and a pressure stabilizing mechanism, the grouting process can meet the environmental conditions of the tunnel during tunnel grouting construction, allowing for grout preparation at the construction site before injection. The mixing mechanism not only provides grout preparation and mixing functions but also assists in mixing and screening materials, improving the quality of the grout preparation to meet construction requirements. The pressure stabilizing mechanism synchronizes the air pressure within the grouting tank, enhancing its sealing effect and ensuring stable grout delivery. Attached Figure Description

[0018] The present invention can be further illustrated by the non-limiting embodiments given in the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the structure of a grouting device for tunnel construction according to the present invention.

[0020] Figure 2 This is a schematic diagram of the pulping tank of the present invention.

[0021] Figure 3 This is a schematic diagram of the pulping tank of the present invention from another angle.

[0022] Figure 4 This is a schematic diagram of the internal structure of the pulping tank of the present invention.

[0023] Figure 5 This is a cross-sectional view of the slurry preparation tank of the present invention.

[0024] Figure 6 for Figure 5 Enlarged diagram of point A in the middle.

[0025] Figure 7 This is a schematic diagram of the structure of the fourth embodiment of the present invention.

[0026] Mobile vehicle body 1, air compressor 11, tank body 2, tank cover 21, alignment pin 22, sealing body 3, motor 4, transmission wheel 41, driven wheel 42, transmission belt 43, main shaft 5, stirring blade 51, connecting ring 6, support platform 61, elastic telescopic rod 62, push plate 63, push plate 64, screening frame 65, homogenizing fan 66, transmission rod 67, sealing cavity 7, U-shaped double channel 71, ventilation channel 72, floating ring 73, spring 74, stepped cavity 75. Detailed Implementation

[0027] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0028] Example 1: As Figure 1-7As shown, a grouting device for tunnel construction includes a mobile vehicle 1, an air compressor 11, a grouting tank, and a control panel. The air outlet of the air compressor 11 is connected to the grouting tank, and the grouting tank is equipped with a stirring mechanism and a pressure stabilizing mechanism.

[0029] The mixing mechanism includes a transmission component, a stirrer, and an auxiliary component. The transmission component is located at the lower end of the pulping tank, the stirrer is located inside the pulping tank and is connected to the transmission component for transmission, and the auxiliary component is located on the upper side inside the pulping tank and is matched with the stirrer.

[0030] The pulping tank includes a tank body 2 and a tank cover 21. The tank cover 21 is connected to the tank body 2 by a positioning pin 22. The tank cover 21 is provided with an air inlet valve and is connected to the air outlet of the air compressor 11. A pressure stabilizing mechanism is provided on the tank cover 21 and is connected and matched with the tank body 2. The pressure stabilizing mechanism includes a sealing body 3 and an adaptive seal. The sealing body 3 is spaced apart in the positioning holes of the tank body 2 that match the positioning pin 22. The sealing body 3 is connected and matched with the positioning pin 22. There are two adaptive seals, which are spaced apart inside and outside the positioning holes on the tank body 2. The adaptive seals are connected and matched with the sealing body 3.

[0031] Before grouting, the entire device is moved to a suitable grouting point by the mobile vehicle 1. Then, grout preparation can begin. During grout preparation, grout and water are injected into the grouting tank, and the stirring mechanism is activated through the control panel, allowing the grout to be prepared at any point. This better addresses the issue of harsh environments during tunnel construction where it is inconvenient for other large grouting vehicles to enter. After the grout is prepared, the grouting tank can be sealed with the tank cover 21, and then air is injected into the grouting tank through the air compressor 11. The increased air pressure inside the grouting tank gradually squeezes out the grout, which is then pumped through pipelines to the designated grouting point to complete the grouting operation.

[0032] The transmission assembly includes a motor 4, a transmission wheel 41, a driven wheel 42, and a transmission belt 43. The motor 4 is fixedly mounted on the outside of the pulping tank. The transmission wheel 41 is fixedly connected to the output shaft of the motor 4. The driven wheel 42 is rotatably mounted at the lower end of the pulping tank and is connected to the agitator for transmission. The transmission belt 43 is located between the transmission wheel 41 and the driven wheel 42.

[0033] The agitator includes a main shaft 5 and agitator blades 51. The number of agitator blades 51 is several and they are evenly distributed on the main shaft 5. The main shaft 5 is rotatably disposed in the pulping tank and is connected to the driven wheel 42 for transmission.

[0034] The motor 4, together with the transmission wheel 41 and the transmission belt 43, transmits rotational power to the driven wheel 42, which drives the main shaft 5, thereby stirring and processing the slurry in the pulping tank through the stirring blades 51.

[0035] Example 2: As Figure 3-5As shown in the embodiment 1, the auxiliary components include an auxiliary stirrer and an auxiliary screener. The auxiliary stirrer includes a connecting ring 6 and several telescopic stirring components. The slurry tank is provided with a support platform 61 connected to the connecting ring 6 by bolts. Several telescopic stirring components are evenly arranged at the lower end of the connecting ring 6. Each telescopic stirring component includes an elastic telescopic rod 62 and several pusher plates 63. The elastic telescopic rod 62 is fixedly connected to the lower end of the connecting ring 6. Several pusher plates 63 are evenly arranged in the telescopic section of the elastic telescopic rod 62. The stirring blade 51 is also provided with pusher plates 64 that match the elastic telescopic rod 62 from top to bottom.

[0036] The auxiliary screening device includes a screening frame 65, a homogenizing fan 66, and a transmission rod 67. The screening frame 65 is located at the upper end of the connecting ring 6. The homogenizing fan 66 is rotatably located inside the screening frame 65. The transmission rod 67 is connected to the homogenizing fan 66 and is slidably connected to the main shaft 5. The transmission rod 67 has a polygonal structure.

[0037] During pulp preparation, cement and fine aggregates can be screened through the screening frame 65 to remove larger impurities and lumps, thereby preventing such substances from affecting the preparation of the pulp, causing pipe blockage or affecting the construction quality. The transmission rod 67 is connected to the main shaft 5, so during the stirring process of the main shaft 5, the homogenizing fan 66 will move synchronously. The homogenizing fan 66 abuts against the screening frame 65 and has a multi-rod structure, which can scrape the material in the screening frame 65, improve the screening effect and prevent material accumulation.

[0038] During mixing, the rotation of the stirring blade 51 causes the pusher plate 64 to cyclically push and abut the telescopic section of the elastic telescopic rod 62. When pushed, the telescopic section of the elastic telescopic rod 62 will contract and move upward, and when disconnected, it will return to its original position and move downward. In this way, the elastic telescopic rod 62 mixes the raw materials of different layers in the slurry tank through the pusher plate 63, thereby improving the mixing effect.

[0039] Example 3: As Figure 5-6 As shown in the embodiment 1, the sealing body 3 has a sealing cavity 7 in the middle that matches the alignment hole. The sealing body 3 also has a U-shaped double passage groove 71 that communicates with the sealing cavity 7. The U-shaped double passage groove 71 is connected and matched with the adaptive sealer. The alignment pin 22 corresponding to the sealing body 3 also has a venting groove 72 that communicates with the inner side of the can lid 21.

[0040] The adaptive seal includes a floating ring 73 and springs 74. The vertical cross-section of the floating ring 73 is T-shaped. There are several springs 74 evenly distributed at the right-angle ends of the floating ring 73. The slurry tank has a stepped cavity 75 that communicates with the U-shaped double groove 71. The floating ring 73 is slidably sealed in the stepped cavity 75.

[0041] Furthermore, to ensure the stability of pulp delivery when increasing the air pressure inside the pulping tank by injecting air, after closing the tank cover 21 and injecting air, the air pressure inside the pulping tank increases. Some of the air will be input into the corresponding alignment pin 22 through the vent groove 72 until it is injected into the sealing cavity 7 of the sealing body 3. At the same time, the alignment pin 22 is slidably connected to the sealing cavity 7. Therefore, the air will be supplied into the corresponding stepped cavity 75 through the U-shaped double channel 71. At this time, the increased air pressure in the stepped cavity 75 will push the floating ring 73 to stay upward. Thus, when the tank cover 21 is installed, the spring 74 will actively push the floating ring 73 upward to make it fit against the lower end face of the tank cover 21 to achieve active sealing. Under the action of air pressure, it can further restrict the sealing, improve the sealing effect, and follow the air pressure intensity inside the pulping tank, which better meets the needs of pulp delivery.

[0042] Example 4: Figure 7 As shown, in a further improvement based on embodiment 3, to avoid some material falling into the sealing cavity 7 during material screening, causing inconvenience in cleaning or obstruction of gas delivery, the sealing cavity 7 in this embodiment directly penetrates the lower end of the sealing body 3. The opening of the ventilation groove 72 corresponding to the positioning pin 22 is located on the side, and the positioning pin 22 has an annular groove corresponding to the opening of the ventilation groove 72. In this way, after the positioning pin 22 extends into the sealing cavity 7, the annular groove of the positioning pin 22 will correspond to the U-shaped double passage groove 71 and deliver the gas. At the same time, the upper and lower sides of the positioning pin 22 are in a sealing sliding connection with the sealing cavity 7 relative to the annular groove, which achieves stable gas delivery and pressure stability, better meeting the needs of construction in the tunnel environment.

[0043] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A grouting device for tunnel construction, comprising a mobile vehicle, an air compressor, a grouting tank, and a control panel, wherein the air outlet of the air compressor is connected to the grouting tank, characterized in that: The pulping tank is equipped with a stirring mechanism and a pressure stabilizing mechanism; The stirring mechanism includes a transmission assembly, a stirrer, and an auxiliary assembly. The transmission assembly is located at the lower end of the pulping tank, the stirrer is located inside the pulping tank and is connected to the transmission assembly in a driving manner, and the auxiliary assembly is located on the upper side inside the pulping tank and is matched with the stirrer. The pulping tank includes a tank body and a tank cover. The tank cover is connected to the tank body by a positioning pin. The tank cover is equipped with an air inlet valve and is connected to the air outlet of the air compressor. A pressure stabilizing mechanism is located on the tank cover and is connected and matched to the tank body. The pressure stabilizing mechanism includes a sealing body and an adaptive seal. The sealing body is spaced apart in the positioning holes of the tank body that match the positioning pins. The sealing body is connected and matched to the positioning pins. There are two adaptive seals, which are spaced apart on the tank body relative to the positioning holes. The adaptive seals are connected and matched to the sealing bodies. The transmission assembly includes a motor, a transmission wheel, a driven wheel, and a transmission belt. The motor is fixedly located on the outside of the pulping tank. The transmission wheel is fixedly connected to the output shaft of the motor. The driven wheel is rotatably located at the lower end of the pulping tank and is connected to the agitator. The system includes a drive belt positioned between the drive wheel and the driven wheel. The agitator comprises a main shaft and agitator blades, with several blades evenly distributed on the main shaft. The main shaft is rotatably mounted within the pulping tank and is connected to the driven wheel via a drive mechanism. The auxiliary components include an auxiliary agitator and an auxiliary screener. The auxiliary agitator includes a connecting ring and several telescopic agitators. The pulping tank contains a support platform connected to the connecting ring by bolts. Several telescopic agitators are evenly distributed at the lower end of the connecting ring. Each telescopic agitator includes an elastic telescopic rod and several pusher plates. The elastic telescopic rod is fixedly connected to the lower end of the connecting ring. Several pusher plates are evenly distributed on the telescopic section of the elastic telescopic rod. The agitator blades are also inclined downwards and equipped with pusher plates that match the elastic telescopic rod.

2. The grouting device for tunnel construction according to claim 1, characterized in that: The auxiliary screening device includes a screening frame, a homogenizing fan, and a transmission rod. The screening frame is located at the upper end of the connecting ring, the homogenizing fan is rotatably located within the screening frame, the transmission rod is drivingly connected to the homogenizing fan and slidingly connected to the main shaft, and the transmission rod has a polygonal structure.

3. A grouting device for tunnel construction according to claim 2, characterized in that: The sealing body has a sealing cavity in the middle that matches the alignment hole. The sealing body also has a U-shaped double-pass groove that communicates with the sealing cavity. The U-shaped double-pass groove is connected and matched with the adaptive sealer. The alignment pin corresponding to the sealing body also has a venting groove that communicates with the inner side of the can lid.

4. A grouting device for tunnel construction according to claim 3, characterized in that: The adaptive seal includes a floating ring and springs. The vertical cross-section of the floating ring is T-shaped. The number of springs is several and they are evenly distributed at the right-angle ends of the floating ring. The slurry tank has a stepped cavity that communicates with the U-shaped double-channel groove. The floating ring is slidably sealed in the stepped cavity.

5. A method of using a grouting device for tunnel construction according to any one of claims 1-4, characterized in that: Before pulping, the equipment is moved to a suitable construction location by a mobile vehicle. Then, the pulping raw materials are injected into the pulping tank and stirred by a mixing mechanism. After pulping is completed, the pulping tank can be sealed, and the air pressure inside the pulping tank is increased by an air compressor to pump the pulp out and inject it into the construction point. The auxiliary components can improve the pulping effect and screen the raw materials during pulping to meet the construction needs. Furthermore, the adaptive sealer can synchronize with the air pressure inside the pulping tank to achieve a more effective sealing effect.

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