Drill bit for rotary extrusion grouting compaction pile construction

Abstract

The utility model relates to the technical field of foundation treatment, and discloses a drill bit for rotary extrusion grouting compaction pile construction, which comprises a drill bit body, the outer surface of the drill bit body is fixedly connected with a thread group, and the top of the drill bit body is fixedly connected with a reverse thread. According to the drill bit for rotary extrusion grouting compaction pile construction, through the arrangement of the drill bit body and the action of the reverse threads, the drilling efficiency and the compaction effect can be improved, meanwhile, under the action of the liquid injection pump, uniform injection and real-time monitoring of slurry are achieved, and therefore the construction efficiency is greatly improved; compared with a traditional drilling mode, the device does not need vibration or hammering equipment, construction noise and environmental pollution can be remarkably reduced, solidified soil slurry is poured into the drill bit body and discharged into a drill hole through the injection hole, a high-quality compaction pile can be formed, the compaction pile has high stability and bearing capacity, and the construction efficiency is improved. The method can adapt to various complex geological conditions, and the foundation reinforcement effect is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of foundation treatment, in particular to a drill bit for rotary extrusion and pressure grouting and compaction pile construction. BACKGROUND

[0002] At present, in the foundation reinforcement engineering, the commonly used compaction pile construction methods mainly include the vibration sinking pipe method, the hammer sinking pipe method and the spiral drilling method. Although these traditional methods can meet the demand of foundation reinforcement to a certain extent, there are still many deficiencies in the actual application. With the development of construction engineering and the progress of technology, the demand for efficient and environmentally friendly foundation reinforcement methods is increasingly urgent, so it is of great significance to develop a new type of efficient rotary extrusion and pressure grouting compaction pile construction technology.

[0003] The prior art usually adopts the vibration sinking pipe method, the hammer sinking pipe method and the spiral drilling method, wherein the vibration sinking pipe method has the advantages of fast construction speed, but has the disadvantages of loud noise, great influence on surrounding buildings and difficult to guarantee the pile quality; the hammer sinking pipe method also has the problem of loud noise, and due to the uneven hammering force, the pile body is prone to tilting or breaking; the spiral drilling method has the advantages of high construction precision, but has the disadvantage of slow drilling speed, and is suitable for small diameter pile construction.

[0004] The prior art has some common problems, such as loud construction noise, serious environmental pollution and low construction efficiency, which not only increase the construction cost, but also may cause adverse effects on the surrounding environment, therefore, the application provides a drill bit for rotary extrusion and pressure grouting compaction pile construction to solve the above problems. CONTENT OF THE INVENTION

[0005] In view of the deficiencies of the prior art, the application provides a drill bit for rotary extrusion and pressure grouting compaction pile construction, which has the advantages of high construction efficiency and quality, reduces noise and environmental pollution, and solves the problems in the background art.

[0006] To achieve the above object, the application provides the following technical scheme: a drill bit for rotary extrusion and filling and extrusion pile construction, comprising a drill bit body, a thread group is fixedly connected to the outer surface of the drill bit body, a reverse thread is fixedly connected to the top of the drill bit body, an injection hole is formed in the outer surface of the drill bit body, a first cavity is formed in the inside of the drill bit body, the injection hole and the first cavity are in communication, a second cavity is formed in the inside of the drill bit body, an electric push rod is fixedly installed on the inner wall of the second cavity, a blocking plate is fixedly connected to the output end of the electric push rod, the electric push rod is electrically connected to an external controller, the outer surface of the blocking plate is inserted into the inner wall of the injection hole, a drill rod is fixedly connected to the upper surface of the drill bit body, a conveying pipe is fixedly connected to the inner wall of the drill rod, the inner wall of the conveying pipe is in communication with the inner wall of the first cavity, an installation plate is arranged above the drill bit body, the installation plate is connected to an external driving device, a liquid injection pump is fixedly installed on the upper surface of the installation plate, and the liquid injection pump is electrically connected to the external controller.

[0007] Through the above scheme, the drilling efficiency and extrusion effect are increased through the action of the drill bit body and the reverse thread, and under the action of the liquid injection pump, uniform injection and real-time monitoring of the slurry are realized, thereby greatly improving the construction efficiency, and compared with the traditional drilling method, the device does not need vibration or hammering equipment, the construction noise and environmental pollution are significantly reduced, and the solidified soil slurry in the inside of the drill bit body is discharged into the drill hole through the injection hole, thereby forming a high-quality extrusion pile, the extrusion pile has high stability and bearing capacity, can adapt to various complex geological conditions, and improves the effect of foundation reinforcement.

[0008] Further, the number of internal threads of the thread group is three, and the three threads are distributed in a circumferential array on the outer surface of the drill bit body.

[0009] Through the above scheme, the drilling efficiency and extrusion effect of the drill bit in the soil layer are increased through the action of the thread group, thereby improving the construction efficiency and quality.

[0010] Further, the outer surface of the drill rod is rotatably connected to the inner wall of the installation plate, a driving assembly is arranged on the upper surface of the installation plate, a first bevel gear is fixedly connected to the top outer surface of the drill rod, a sealing bearing is installed on the end of the drill rod away from the drill bit body, a connecting seat is fixedly connected to the outer surface of the sealing bearing, and a communication pipe is fixedly installed in the inside of the connecting seat.

[0011] Through the above scheme, the conveying pipe is stably communicated with the inner wall of the communication pipe through the rotation of the drill rod, so that the communication pipe can stably inject the soil slurry into the inside of the first cavity through the conveying pipe.

[0012] Further, one end of the communication pipe is fixedly connected to an output end of the liquid injection pump, and an input end of the liquid injection pump is connected to an external solidified soil slurry tank through a pipeline.

[0013] Through the above scheme, through the action of the liquid injection pump, the liquid injection pump is connected with the external controller, so that the staff can monitor the parameters such as grouting pressure, grouting speed and grouting amount in real time, to ensure the grouting effect.

[0014] Further, the inner bottom wall of the first cavity is fixedly installed with a temperature sensor, and the temperature sensor is electrically connected with the external controller.

[0015] Through the above scheme, through the action of the temperature sensor, the temperature of the slurry in the first cavity and the temperature of the drill bit body can be monitored in real time, so as to prevent the performance of the material from being reduced due to high temperature.

[0016] Further, the driving assembly comprises a mounting seat, the bottom surface of the mounting seat is fixedly connected to the upper surface of the drill bit body, the inside of the mounting seat is fixedly installed with a servo motor, the servo motor is electrically connected with the external controller, the output end of the servo motor is fixedly connected with a speed reducer, and the bottom surface of the speed reducer is fixedly connected to the upper surface of the mounting plate.

[0017] Through the above scheme, through the action of the speed reducer, the high-speed low-torque output of the servo motor can be converted into low-speed high-torque output, which helps to maintain the stability and precision of the drill bit body, thereby improving the energy utilization efficiency of the whole equipment.

[0018] Further, the output end of the speed reducer is fixedly connected with a second bevel gear, and the second bevel gear is engaged with the first bevel gear.

[0019] Through the above scheme, through the cooperation of the second bevel gear and the first bevel gear, the torque and power can be efficiently transmitted and the energy loss can be reduced, so as to ensure the stable rotation of the drill pipe, and the transmission of the gear can further reduce the noise and vibration in the transmission process, thereby reducing the construction noise.

[0020] Further, the drill bit body is shaped like a spindle, and the material of the drill bit body is high-strength alloy steel.

[0021] Through the above scheme, the shape of the drill bit body helps to increase the drilling efficiency and compaction effect of the drill bit in the soil layer, and the material properties ensure the durability of the drill bit body under complex geological conditions.

[0022] Compared with the prior art, the technical scheme of the present application has the following beneficial effects:

[0023] The drill bit for the construction of the rotary extrusion filling pile can increase the drilling efficiency and the extrusion effect through the reverse thread of the drill bit body, and can realize the uniform injection and real-time monitoring of the slurry under the action of the liquid injection pump, so as to greatly improve the construction efficiency, and compared with the traditional drilling method, the device does not need vibration or hammering equipment, can significantly reduce the construction noise and environmental pollution, and the solidified soil slurry in the drill bit body can be discharged into the drill hole through the injection hole, so as to form a high-quality extrusion pile, which has high stability and bearing capacity, can adapt to various complex geological conditions, and improves the effect of foundation reinforcement. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the drill bit body of the present application;

[0025] Figure 2 It is a schematic diagram of the cross-sectional structure of the drill bit body of the present application;

[0026] Figure 3 It is a schematic diagram of the three-dimensional structure of the whole of the present application;

[0027] Figure 4 It is a schematic diagram of the three-dimensional structure of the mounting plate, drive assembly of the present application;

[0028] Figure 5 It is a schematic diagram of the internal structure of the drill rod, sealing bearing, connecting seat of the present application.

[0029] In the figure:

[0030] 1, drill bit body; 2, thread group; 3, reverse thread; 4, injection hole; 5, first cavity; 6, second cavity; 7, electric push rod; 8, blocking plate; 9, drill rod; 10, conveying pipe; 11, mounting plate; 12, first bevel gear; 13, drive assembly; 1301, mounting seat; 1302, servo motor; 1303, reduction box; 1304, second bevel gear; 14, sealing bearing; 15, connecting seat; 16, communication pipe; 17, liquid injection pump; 18, temperature sensor. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0032] Please refer to Figure 1 , Figure 2 and Figure 3The drill bit for the construction of the rotary extrusion and filling and extrusion pile in the embodiment comprises a drill bit body 1, the shape of the drill bit body 1 is spindle-shaped, the material of the drill bit body 1 is high-strength alloy steel, the shape of the drill bit body 1 helps to increase the drilling efficiency and extrusion effect of the drill bit in the soil layer, meanwhile, the material characteristics ensure the durability of the drill bit body 1 under complex geological conditions, a threaded group 2 is fixedly connected to the outer surface of the drill bit body 1, the number of internal threads of the threaded group 2 is three, the three threads are distributed in a circumferential array on the outer surface of the drill bit body 1, through the setting of the threaded group 2, the drilling efficiency and extrusion effect of the drill bit in the soil layer can be increased, thereby improving the construction efficiency and quality, a reverse thread 3 is fixedly connected to the top of the drill bit body 1, an injection hole 4 is arranged on the outer surface of the drill bit body 1, a first cavity 5 is arranged in the drill bit body 1, the injection hole 4 and the first cavity 5 are in communication, a second cavity 6 is arranged in the drill bit body 1, an electric push rod 7 is fixedly installed on the inner wall of the second cavity 6, a blocking plate 8 is fixedly connected to the output end of the electric push rod 7, the electric push rod 7 is electrically connected with an external controller, the outer surface of the blocking plate 8 is inserted into the inner wall of the injection hole 4, the setting of the blocking plate 8 can block the injection hole 4, avoiding the soil in the hole entering the inside of the first cavity 5 during the drilling process, and the injection hole 4 is located between the two threads, which can effectively cut the soil layer during the drilling process to avoid soil blocking the injection hole 4, a drill rod 9 is fixedly connected to the upper surface of the drill bit body 1, a conveying pipe 10 is fixedly connected to the inner wall of the drill rod 9, the inner wall of the conveying pipe 10 is in communication with the inner wall of the first cavity 5, an installation plate 11 is arranged above the drill bit body 1, the installation plate 11 is connected with an external driving device, a liquid injection pump 17 is fixedly installed on the upper surface of the installation plate 11, through the setting of the drill bit body 1 and the reverse thread 3, the drilling efficiency and extrusion effect can be increased, meanwhile, under the action of the liquid injection pump 17, uniform injection and real-time monitoring of the slurry are realized, thereby greatly improving the construction efficiency, and compared with the traditional drilling method, the device does not need vibration or hammering equipment, which can significantly reduce the construction noise and environmental pollution, and the solidified soil slurry in the drill bit body 1 is discharged into the drilling hole through the injection hole 4, which can form a high-quality extrusion pile, the extrusion pile has high stability and bearing capacity, and can adapt to various complex geological conditions, thereby improving the effect of foundation reinforcement, the liquid injection pump 17 is electrically connected with an external controller.

[0033] Please refer to Figure 1 , Figure 3 and Figure 5The outer surface of the drill rod 9 is rotationally connected to the inner wall of the mounting plate 11, the upper surface of the mounting plate 11 is provided with a driving assembly 13, the top outer surface of the drill rod 9 is fixedly connected with the first bevel gear 12, the end of the drill rod 9 away from the drill bit body 1 is provided with a sealing bearing 14, the outer surface of the sealing bearing 14 is fixedly connected with a connecting seat 15, the inside of the connecting seat 15 is fixedly installed with a communication pipe 16, through the effects of the sealing bearing 14 and the connecting seat 15, the conveying pipe 10 can be stably communicated with the inner wall of the communication pipe 16 through the rotation of the drill rod 9, so that the communication pipe 16 can stably inject the soil slurry into the first cavity 5 through the conveying pipe 10, the end of the communication pipe 16 away from the connecting seat 15 is fixedly connected to the output end of the liquid injection pump 17, the input end of the liquid injection pump 17 is connected with an external solidified soil slurry tank through a pipeline, through the effect of the liquid injection pump 17, the liquid injection pump 17 is connected with an external controller, so that the staff can monitor the parameters such as grouting pressure, grouting speed and grouting amount in real time, so as to ensure the grouting effect, the inner bottom wall of the first cavity 5 is fixedly installed with a temperature sensor 18, the temperature sensor 18 is electrically connected with an external controller, through the effect of the temperature sensor 18, the temperature of the slurry in the first cavity 5 and the temperature of the drill bit body 1 can be monitored in real time, so as to prevent the performance of the material from being reduced due to high temperature.

[0034] Please refer to Figure 3 and Figure 4 The driving assembly 13 comprises a mounting seat 1301, the bottom surface of the mounting seat 1301 is fixedly connected to the upper surface of the drill bit body 1, the mounting seat 1301 can limit and fix the servo motor 1302, so as to ensure that the servo motor 1302 can stably output, the inside of the mounting seat 1301 is fixedly installed with a servo motor 1302, the servo motor 1302 is electrically connected with an external controller, the output end of the servo motor 1302 is fixedly connected with a speed reducer 1303, and the bottom surface of the speed reducer 1303 is fixedly connected to the upper surface of the mounting plate 11, through the effect of the speed reducer 1303, the high-speed low-torque output of the servo motor 1302 can be converted into low-speed high-torque output, which is helpful to maintain the stability and precision of the drill bit body 1, thereby improving the energy utilization efficiency of the whole equipment, the output end of the speed reducer 1303 is fixedly connected with a second bevel gear 1304, the second bevel gear 1304 is engaged with the first bevel gear 12, through the cooperation of the second bevel gear 1304 and the first bevel gear 12, the torque and power can be efficiently transmitted and the energy loss can be reduced, so as to ensure that the drill rod 9 can stably rotate, and the transmission of the gear can further reduce the noise and vibration in the transmission process, thereby reducing the construction noise.

[0035] The drill bit for the construction of the rotary extrusion pile in the embodiment can increase the drilling efficiency and the extrusion effect through the effect of the drill bit body 1 and the reverse thread 3, and can realize the uniform injection and real-time monitoring of the slurry under the effect of the liquid injection pump 17, so that the construction efficiency is greatly improved, and compared with the traditional drilling method, the device does not need vibration or hammering equipment, can significantly reduce the construction noise and environmental pollution, and the solidified soil slurry in the drill bit body 1 can be discharged into the drill hole through the injection hole 4, so that a high-quality extrusion pile can be formed, the extrusion pile has high stability and bearing capacity, can adapt to various complex geological conditions, and improves the effect of foundation reinforcement.

[0036] The working principle of the above embodiment is as follows: first, the servo motor 1302 is started, and the output thereof is transmitted to the second bevel gear 1304 through the reduction box 1303 and drives the second bevel gear 1304 to rotate, which can drive the drill rod 9 to rotate and drive the drill bit body 1 to rotate in cooperation with the first bevel gear 12, then the mounting plate 11 drives the drill bit body 1 to move downward under the drive of the external driving equipment, and after the drill rod 9 rotates and presses downward to the predetermined depth, the thread set 2 on the surface of the drill bit body 1 helps to increase the drilling efficiency and the extrusion effect, and can reduce the construction noise and environmental pollution, then when the drill hole reaches the predetermined depth, the drilling is stopped and the drill rod 9 is kept stationary, at this time, the driving assembly 13 is started, the solidified soil slurry prepared in advance is injected into the first cavity 5 in the drill bit body 1 through the communication pipe 16 and the delivery pipe 10, the injection hole 4 is opened through the electric push rod 7, and the slurry is uniformly injected into the drill hole, in the process of grouting, the control system monitors the grouting pressure, grouting speed and grouting amount and other parameters of the liquid injection pump 17 in real time to ensure the grouting effect, finally, after the grouting is completed, the drill rod 9 and the drill bit body 1 are lifted, and the slurry is continuously injected while the drill rod 9 is slowly lifted during the lifting process, at this time, due to the fluidity of the slurry, the slurry will continue to fill the drill hole as the drill rod 9 is lifted, until it completely exits the ground, at this time, the slurry in the drill hole will solidify to form an extrusion pile.

[0037] It should be noted that in this document, the terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or equipment including the element.

[0038] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary and that changes can be made in detail without departing from the principles and spirit of the application. The scope of the application is therefore defined by the appended claims and their equivalents.

Claims

1. A drill bit for rotary extrusion pile construction, comprising a drill bit body (1), characterized in that: The outer surface of the drill bit body (1) is fixedly connected with a threaded group (2), the top of the drill bit body (1) is fixedly connected with a reverse thread (3), the outer surface of the drill bit body (1) is provided with an injection hole (4), the inside of the drill bit body (1) is provided with a first cavity (5), the injection hole (4) and the first cavity (5) are communicated, the inside of the drill bit body (1) is provided with a second cavity (6), the inner wall of the second cavity (6) is fixedly installed with an electric push rod (7), the output end of the electric push rod (7) is fixedly connected with a blocking plate (8), the electric push rod (7) is electrically connected with an external controller, the outer surface of the blocking plate (8) is inserted into the inner wall of the injection hole (4), the upper surface of the drill bit body (1) is fixedly connected with a drill rod (9), the inner wall of the drill rod (9) is fixedly connected with a conveying pipe (10), the inner wall of the conveying pipe (10) is communicated with the inner wall of the first cavity (5), the upper surface of the installation plate (11) is fixedly installed with a liquid injection pump (17), the liquid injection pump (17) is electrically connected with an external controller.

2. The drill bit according to claim 1, wherein: The number of internal threads of the threaded group (2) is three, and the three threads are distributed in a circumferential array on the outer surface of the drill bit body (1).

3. The drill bit of claim 1, wherein: The outer surface of the drill rod (9) is rotatably connected to the inner wall of the installation plate (11), the upper surface of the installation plate (11) is provided with a driving assembly (13), the top outer surface of the drill rod (9) is fixedly connected with a first bevel gear (12), the end of the drill rod (9) away from the drill bit body (1) is provided with a sealing bearing (14), the outer surface of the sealing bearing (14) is fixedly connected with a connecting seat (15), and the inside of the connecting seat (15) is fixedly installed with a communication pipe (16).

4. The drill bit of claim 3, wherein: The end of the communication pipe (16) away from the connecting seat (15) is fixedly connected to the output end of the liquid injection pump (17), and the input end of the liquid injection pump (17) is connected with an external solidified soil slurry tank through a pipeline.

5. The drill bit of claim 1, wherein: The inner bottom wall of the first cavity (5) is fixedly installed with a temperature sensor (18), and the temperature sensor (18) is electrically connected with an external controller.

6. The drill bit of claim 3, wherein: The driving assembly (13) comprises a mounting seat (1301), the bottom surface of the mounting seat (1301) is fixedly connected to the upper surface of the drill bit body (1), the inside of the mounting seat (1301) is fixedly installed with a servo motor (1302), the servo motor (1302) is electrically connected with an external controller, the output end of the servo motor (1302) is fixedly connected with a reduction box (1303), and the bottom surface of the reduction box (1303) is fixedly connected to the upper surface of the installation plate (11).

7. The drill bit of claim 6, wherein: The output end of the reduction box (1303) is fixedly connected with a second bevel gear (1304), and the second bevel gear (1304) is engaged with the first bevel gear (12).

8. The drill bit of claim 1, wherein: The shape of the drill bit body (1) is spindle-shaped, and the material of the drill bit body (1) is high-strength alloy steel material.

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