A dual-axis high-pressure rotary spraying equipment and its construction process

Abstract

The present invention relates to a dual-axis high-pressure jet grouting equipment and a construction process thereof, belonging to the field of building construction technology. The equipment comprises a mobile vehicle, the mobile vehicle comprising a main control room and a mobile assembly for movement, support frames being provided at both the front and rear ends of the mobile vehicle, and a power assembly being provided on the support frame at the front end. The power assembly is transmission-connected to two high-pressure jet grouting drill rods, and the power assembly is electrically connected to the main control room for controlling the high-pressure jet grouting drill rods to cast jet grouting pile bodies. Both high-pressure jet grouting drill rods are externally connected to a high-pressure grouting pump. The present invention can form an interlocking pile system with good water-cutting and soil-retaining effects, has a wide range of applications, and can effectively accelerate the construction cycle.

Description

Technical Field

[0001] The invention relates to a double-axis high-pressure rotary spraying device and a construction process thereof, belonging to the technical field of building construction. Background Art

[0002] Currently, due to the accelerated urbanization process and the increasing demand for underground structures, high-pressure jet grouting piles are widely used in foundation pit support. High-pressure jet grouting piles primarily serve the purpose of water interception and soil retaining in foundation pit support. However, when encountering soil layers containing larger particles such as gravel, crushed stone, and miscellaneous fill, the large particles often block the piles, resulting in poor pile formation and irregular pile shapes. Furthermore, this can cause the pit sidewalls to lose water interception, leading to risks such as water gushing and mud flow. This has a significant impact on foundation pit construction safety and schedule, limiting the application of high-pressure jet grouting piles and urgently requires improvement.

[0003] A combined high-pressure rotary grouting machine disclosed in the Chinese invention patent with publication number CN211598515U includes a walking device and a lifting and rotating working device, and the walking device is connected to the lifting and rotating working device through a boom; the lifting and rotating working device includes a drill rig, a slide, a hydraulic power head and a rotary grouting drill rod, and the slide is fixedly connected to the hydraulic power head; a slide groove is provided on one side of the drill rig, and a lifting belt fixedly connected to the slide is provided in the slide groove; a limit plate is also provided at the bottom of the drill rig, and the rotary grouting drill rod is connected to the first rotary motor in the hydraulic power head after passing through the limit hole; a vertical trapezoidal connecting frame is also provided on the other side of the drill rig, and the drill rig is hinged to the end of the boom through the lower connecting hole on the trapezoidal connecting frame, and is hinged to the boom hydraulic rod on the boom through the upper connecting hole.

[0004] The above reference example can effectively speed up the transfer speed of high-pressure jet grouting piles. However, when encountering soil layers containing larger particles, there are still problems such as poor jet grouting pile formation effect and unformed pile shape. Therefore, improvement is urgently needed. Summary of the Invention

[0005] In order to overcome the shortcomings of existing high-pressure rotary jet pile construction equipment, such as poor pile formation effect and irregular pile shape when encountering larger particle soil layers, the present invention designs a dual-axis high-pressure rotary jet equipment and its construction process, which can form an interlocking pile system with good water-cutting and soil-retaining effects, has a wide range of applications, and can effectively accelerate the construction period.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] Technical Solution 1

[0008] A dual-axis high-pressure rotary grouting equipment includes a mobile vehicle, which includes a main control room and a mobile component for movement. Support frames are provided at the front and rear ends of the mobile vehicle, and a power component is provided on the support frame at the front end. The power component is connected to two high-pressure rotary grouting drill rods in a transmission manner, and the power component is electrically connected to the main control room for controlling the high-pressure rotary grouting drill rods to cast rotary grouting piles. Both high-pressure rotary grouting drill rods are externally connected to high-pressure grouting pumps.

[0009] Furthermore, the power assembly includes a vertical driving member vertically fixed on the top of the support frame, the vertical driving member is connected to a lateral swinging device for sliding up and down, the lateral swinging device is electrically connected to the main control room, and the lateral swinging device is transmission-connected to two swinging arms that can swing in the horizontal direction, the lateral swinging device controls the swinging of the two swinging arms through the control signal sent by the main control room, a power head device is fixed to the free end of the swing arm, and the power head device is transmission-connected to the high-pressure rotary jet drill rod in a one-to-one correspondence.

[0010] Furthermore, the vertical driving member includes a vertically arranged guide frame, the lateral swinging device is movably connected to the guide frame up and down, and a driving component for driving the lateral swinging device to move up and down is arranged in the guide frame.

[0011] Furthermore, the lateral swing device includes a housing, a gear assembly arranged in the housing, and a second motor for driving the gear assembly and electrically connected to the main control room. The gear assembly includes a driving gear, a transmission gear and a pair of mutually meshing driven gears. The driving gear is connected to the second motor, and the transmission gear 5 is respectively meshed with the driving gear and one of the driven gears. The two driven gears are coaxially provided with a rotating sleeve, and the two rotating sleeves are respectively fixedly connected to the two swing arms.

[0012] Furthermore, the bottom end of the front support frame is rotatably connected to an electric ground anchor, a spiral limiting piece is circumferentially provided on the side wall of the electric ground anchor, and the electric ground anchor is electrically connected to the main control room.

[0013] Furthermore, a pulse booster pump is also provided on the vehicle body, and both of the high-pressure jet jet drill rods are connected to the pulse booster pump.

[0014] Technical Solution 2

[0015] A construction process based on the dual-axis high-pressure jet grouting equipment in technical solution 1 includes the following steps:

[0016] S1: Measurement and setting out: Use the total station to lay out the axis, determine the position of the two jet nozzle piles, and drive steel bars into each jet nozzle pile position;

[0017] 5S2: Arrange a mixing platform: Arrange a mixing platform near the two jet nozzles, and arrange a first-stage mixer and a second-stage mixer in series on the mixing platform. The first-stage mixer is for feeding and mixing, and the second-stage mixer is for filtering and mixing. The second-stage mixer is connected to a high-pressure grouting pump, and the high-pressure grouting pump is connected to a high-pressure jet grouting drill pipe;

[0018] S3: Equipment in place: Move the mobile vehicle to the designated location and adjust the support frame to a horizontal position. Then, through the control instructions issued by the main control room, control the lateral swing device to adjust the horizontal distance between the two high-pressure jet grouting drill rods so that the two high-pressure jet grouting drill rods are aligned with the center position of the two jet grouting nozzle piles respectively;

[0019] S4: Jet grouting: The high-pressure jet grouting drill rod is lowered to the bottom depth of the pre-drilled hole through the driving assembly. After the two high-pressure jet grouting drill rods reach the bottom depth of the pre-drilled hole, the pressure of the high-pressure grouting pump is increased to the construction design value. Then, the two high-pressure jet grouting drill rods are controlled by the power head device to perform swing grouting or jet grouting. After the two high-pressure jet grouting drill rods have been grouting for a period of time, the two high-pressure jet grouting drill rods are kept rotating at a uniform speed and the high-pressure jet grouting drill rods are lifted at the same time, and finally the high-pressure jet grouting drill rods are withdrawn from the jet grouting port pile position.

[0020] S5: Repeat grouting: Repeat step S4 until the pouring of the rotary jet pile body is completed.

[0021] Furthermore, it also includes step S6: equipment cleaning: after the jet grouting pile construction is completed, the high-pressure grouting pump is connected to a slurry tank filled with clean water, and then the high-pressure grouting pump is turned on to clean the remaining cement slurry in all pipelines and clean the soil on the high-pressure jet grouting drill rod.

[0022] Furthermore, in step S2, the distance between the high-pressure grouting pump and the two high-pressure jet grouting drill pipes does not exceed 50m.

[0023] Furthermore, in step S3, the centering error of the high-pressure jet grouting drill pipe is no more than 5 cm, and the verticality deviation of the high-pressure jet grouting drill pipe is no more than 1% to 1.5%.

[0024] Compared with the prior art, the present invention has the following characteristics and beneficial effects:

[0025] The present invention arranges two high-pressure rotary jet drill rods and controls the two high-pressure rotary jet drill rods to cast the rotary jet pile body by arranging a power component, so that when spraying high-pressure slurry, different working modes can be selected through the cooperation of the two high-pressure rotary jet drill rods so that the high-pressure slurry can better wrap the large particles of sand and gravel in the soil layer, thereby forming higher-quality rotary jet piles, greatly increasing the application range of rotary jet piles, and simplifying construction. At the same time, through the arrangement of a mobile vehicle and a mobile component, the mobile vehicle can be conveniently moved to different construction sites, and the construction of the rotary jet pile interlocking pile system is convenient. The main control room is used to control the movement of the mobile vehicle and the movement of the power component to realize integrated control, which is conducive to completing the casting task efficiently and quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a side view of the overall structure of the present invention;

[0027] Figure 2 is a top view of the power assembly of the present invention;

[0028] Figure 3 1 is a cross-sectional view of the installation of the screw rod assembly in the first embodiment of the present invention;

[0029] Figure 4 It is a schematic diagram of the internal structure of the lateral swing device of the present invention;

[0030] Figure 5 This is a schematic diagram of the cooperation between the telescopic legs and the support plate of the present invention;

[0031] Figure 6 It is a structural schematic diagram of the electric ground anchor of the present invention;

[0032] Figure 7 It is a construction process flow chart of the present invention;

[0033] Figure 8 Schematic diagram of working mode 1 of two high-pressure jet grouting drill rods of the present invention;

[0034] Figure 9 It is a schematic diagram of the working mode 2 of two high-pressure jet grouting drill rods of the present invention;

[0035] Figure 10 It is the occlusal system formed after the spraying of the present invention is completed.

[0036] The accompanying drawings are marked as follows: 1. Mobile vehicle; 101. Main control room; 2. Pulse booster pump; 3. Support frame; 4. Telescopic support leg; 41. Block; 51. Socket hole; 52. Axial slot; 53. Arc slot; 5. Support plate; 6. Power assembly; 7. Power head device; 8. High-pressure jet grouting drill pipe; 9. Jet grouting pile body; 10. Large-grained sand and gravel; 11. Cast-in-place pile; 12. Electric ground anchor; 121. Spiral limit plate; 14. Vertical drive member; 1401. Transmission screw; 1402. Vertical moving member; 1403. Guide frame; 1404. Limiting slot; 15. Horizontal swing device; 1501. Housing; 16. Swing arm; 17. Driving gear; 18. Transmission gear; 19. Driven gear; 20. Rotating sleeve. DETAILED DESCRIPTION

[0037] The present invention will be described in more detail below with reference to the embodiments.

[0038] like Figure 1 、 Figure 2 、 Figure 4 and Figure 6 As shown, a dual-axis high-pressure rotary grouting equipment includes a mobile vehicle 1, which includes a main control room 101 and a mobile component for movement. Support frames 3 are provided at both the front and rear ends of the mobile vehicle 1, and a power component 6 is provided on the support frame 3 at the front end. The power component 6 is transmission-connected to two high-pressure rotary grouting drill rods 8, and the power component 6 is electrically connected to the main control room 101 for controlling the high-pressure rotary grouting drill rods 8 to cast the rotary grouting pile body 9. The two high-pressure rotary grouting drill rods 8 are both externally connected to a high-pressure grouting pump.

[0039] From the above description, it can be seen that the beneficial effect of the present invention is that: by setting up two high-pressure rotary jet drill rods 8, and by setting up a power component 6 to control the two high-pressure rotary jet drill rods 8 to cast the rotary jet pile body 9, when spraying high-pressure slurry, different working modes can be selected through the cooperation of the two high-pressure rotary jet drill rods 8 so that the high-pressure slurry can better wrap the large-particle sand and gravel 10 in the soil layer, thereby forming a higher-quality rotary jet pile, greatly increasing the application range of the rotary jet pile, and the construction is simple. At the same time, through the setting of the mobile vehicle 1 and the mobile component, the mobile vehicle 1 is conveniently moved to different construction sites, and the construction of the rotary jet pile interlocking pile system is convenient. The main control room 101 is used to control the movement of the mobile vehicle 1 and the movement of the power component 6 to realize integrated control, which is conducive to the efficient and quick completion of the casting task.

[0040] Furthermore, the power assembly 6 includes a vertical driving member 14 vertically fixed on the top of the support frame 3. The vertical driving member 14 is connected to a lateral swinging device 15 that slides up and down. The lateral swinging device 15 is electrically connected to the main control room 101, and the lateral swinging device 15 is transmission-connected to two swinging arms 16 that can swing in the horizontal direction. The lateral swinging device 15 controls the swinging of the two swinging arms 16 through the control signal sent by the main control room 101. The free end of the swing arm 16 is fixed with a power head device 7, and the power head device 7 is transmission-connected to the high-pressure rotary jet drill pipe 8 one-to-one.

[0041] As can be seen from the above description, the setting of the vertical drive member 14 ensures that the lateral swing device 15 can slide along the length setting direction of the vertical drive member 14, thereby ensuring that the high-pressure rotary jet drill rod 8 can be drilled vertically downward into the ground, ensuring the stability of the rotary jet pile body 9. The lateral swing device 15 is used to control the swing of the two swing arms 16 and thus control the distance between the two high-pressure rotary jet drill rods 8, which is convenient for adapting to rotary jet pile bodies 9 of different diameters, greatly improving the applicability of the device. The power head device 7 is used to control the rotation of the high-pressure rotary jet drill rod 8, which is convenient for the high-pressure rotary jet drill rod 8 to drill into the ground. After adjusting the lateral swing device 15, the ground can be drilled to a pre-designed depth through the cooperation of the vertical drive member 14 and the power head device 7.

[0042] Furthermore, the vertical driving member 14 includes a vertically arranged guide frame 1403, the lateral swing device 15 is movably connected to the guide frame 1403 up and down, and a driving component for driving the lateral swing device 15 to move up and down is arranged in the guide frame 1403.

[0043] From the above description, it can be seen that the driving component can be selected according to the specific situation to ensure that it can drive the lateral swing device 15 to move along the length direction of the guide frame 1403. For example, a screw mechanism drive, a hydraulic cylinder drive or a gear rack mechanism drive can be selected. The guide frame 1403 plays a guiding role in the vertical direction and is also used to fix the driving component.

[0044] like Figure 4 As shown, the lateral swing device 15 includes a housing 1501, a gear assembly arranged in the housing 1501, and a second motor for driving the gear assembly and electrically connected to the main control room 101. The gear assembly includes a driving gear 17, a transmission gear 18 and a pair of mutually meshing driven gears 19. The driving gear 17 is connected to the second motor in a transmission manner. The transmission gear 18 is respectively meshed with the driving gear 17 and one of the driven gears 19. The two driven gears 19 are both coaxially provided with a rotating sleeve 20, and the two rotating sleeves 20 are respectively fixedly connected to the two swing arms 16.

[0045] From the above description, it can be seen that the second motor drives the driving gear 17 to rotate, the driving gear 17 rotates to drive the transmission gear 18 to rotate, the transmission gear 18 rotates and then drives the two driven gears 19 that are meshed with each other to rotate, the driven gear 19 rotates and then drives the rotating sleeve 20 to rotate, thereby realizing the swing of the two swing arms 16, and can realize the two swing arms 16 swinging toward or away from each other, thereby facilitating the control of the distance between the two power head devices 7 and facilitating the construction of the rotary jet pile body 9.

[0046] like Figure 1 and Figure 6 As shown, the bottom end of the front support frame 3 is rotatably connected to the electric ground anchor 12, a spiral limiting piece 121 is circumferentially provided on the side wall of the electric ground anchor 12, and the electric ground anchor 12 is electrically connected to the main control room 101.

[0047] From the above description, it can be seen that the setting of the electric ground anchor 12 can be controlled by the main control room 101 to extend and rotate and plug into the ground during operation, thereby increasing the tension between the electric ground anchor 12 and the ground, and preventing the rotary grouting work from being unable to proceed smoothly due to insufficient weight of the mobile vehicle 1 itself. At the same time, through the setting of the spiral limiting plate 121, the tension between the electric ground anchor 12 and the ground is further increased to ensure that the pouring work proceeds smoothly.

[0048] Furthermore, a pulse booster pump 2 is provided on the mobile vehicle body 1 , and both high-pressure jet grouting drill rods 8 are connected to the pulse booster pump 2 .

[0049] From the above description, it can be seen that the pulse booster pump 2 can make the jet water, gas and cement slurry change at high pressure and high frequency, thereby forming an intermittent jet flow, which can better adapt to different large-particle sand and gravel 10 and further improve the quality of the final jet grouting pile.

[0050] like Figure 7 As shown, a construction process of a dual-axis high-pressure rotary spraying equipment includes the following steps:

[0051] S1: Measurement and setting out: Use the total station to lay out the axis, determine the position of the two jet nozzle piles, and drive steel bars into each jet nozzle pile. The setting of step S1 is to achieve accurate positioning of the pile position and to ensure the structural stability during the subsequent pile forming;

[0052] S2: Arrange a mixing platform: Arrange a mixing platform near the two jet nozzle pile positions, and arrange a first-level mixer and a second-level mixer in series on the mixing platform. The first-level mixer is for feeding and stirring, and the second-level mixer is for filtering and stirring. The second-level mixer is connected to a high-pressure grouting pump, and the high-pressure grouting pump is connected to a high-pressure jet grouting drill pipe 8. Through the settings of step S2, grouting slurry is prepared;

[0053] S3: Equipment in place: Move the mobile vehicle 1 to the designated position, and adjust the support frame 3 to a horizontal position. Then, the control command issued by the main control room 101 controls the lateral swing device 15 to adjust the horizontal spacing between the two high-pressure jet grouting drill rods 8 so that the two high-pressure jet grouting drill rods 8 are respectively aligned with the center positions of the two jet grouting nozzle piles. In the setting of step S3, the mobile vehicle 1 is moved to the designated position by the mobile assembly to facilitate construction. The support frame 3 is adjusted to a horizontal position so that the high-pressure jet grouting drill rods 8 can be vertically downward.

[0054] After the grouting is completed, the two high-pressure rotary jet drill rods 8 are rotated 360 degrees in a certain direction to spray slurry. After the two high-pressure rotary jet drill rods 8 have reached the depth of the pre-drilled hole, the pressure of the high-pressure grouting pump is increased to the construction design value. Then, the two high-pressure rotary jet drill rods 8 are controlled by the power head device 7 to perform swing spraying or rotary spraying, wherein the swing spraying is that the high-pressure rotary jet drill rod 8 rotates back and forth within a certain angle to spray slurry, and the rotary spraying is that the high-pressure rotary jet drill rod 8 rotates 360 degrees in one direction to spray slurry. After the two high-pressure rotary jet drill rods 8 have been spraying grout for a period of time, the two high-pressure rotary jet drill rods 8 are kept rotating at a uniform speed and the high-pressure rotary jet drill rods 8 are lifted at the same time. Finally, the high-pressure rotary jet drill rods 8 are withdrawn from the rotary jet port pile position. Through the setting of step S4, the rotary spraying or swing spraying of the two high-pressure rotary jet drill rods 8 can effectively wrap the large-grained sand and gravel 10 with slurry, effectively ensuring that there is slurry on both sides of the large-grained sand and gravel 10, thereby forming a complete rotary jet pile body 9, thereby ensuring the integrity and stability of the pile body;

[0055] S5: Repeat grouting: Repeat step S4 until the pouring of the rotary jet pile body 9 is completed. Through the setting of step S5, the pouring of the rotary jet pile body 9 is completed through repeated grouting.

[0056] Furthermore, it also includes step S6: equipment cleaning: after the construction of the jet grouting pile body 9 is completed, the high-pressure grouting pump is connected to a slurry tank filled with clean water, and then the high-pressure grouting pump is turned on to clean the remaining cement slurry in all pipelines, and at the same time clean the soil on the high-pressure jet grouting drill rod 8.

[0057] As can be seen from the above description, through the setting of step S6, the cleaning of the equipment is ensured, the pipeline is prevented from being blocked, and the next use of each equipment is facilitated, thereby ensuring work efficiency.

[0058] Furthermore, in step S2, the distance between the high-pressure grouting pump and the two high-pressure jet grouting drill pipes 8 does not exceed 50m.

[0059] From the above description, it can be seen that if the distance between the high-pressure grouting pump and the two high-pressure jet grouting drill rods 8 is greater than 50m, it is impossible to ensure that the injection pressure reaches the specified parameters, thereby affecting the pile body forming.

[0060] Furthermore, in step S3, the centering error of the high-pressure jet grouting drill pipe 8 is no more than 5 cm, and the verticality deviation of the high-pressure jet grouting drill pipe 8 is no more than 1% to 1.5%.

[0061] It can be seen from the above description that by limiting the centering error and verticality deviation, the pile quality of the jet-jet pile body 9 can be effectively improved, and the stability of the subsequent interlocking pile system can be ensured.

[0062] Example 1

[0063] In this embodiment, a dual-axis high-pressure jet grouting equipment is applied in the construction of jet grouting piles.

[0064] like Figure 1 、 Figure 2 、 Figure 5 and Figure 6 As shown, a dual-axis high-pressure rotary grouting equipment includes a mobile vehicle 1, which includes a main control room 101, a pulse booster pump 2 and a mobile component for moving. Support frames 3 are provided at the front and rear ends of the mobile vehicle 1, and a power component 6 is provided on the support frame 3 at the front end. The power component 6 is connected to two high-pressure rotary grouting drill rods 8 by transmission, and the power component 6 is used to control the high-pressure rotary grouting drill rods 8 to cast the rotary grouting pile body 9. The two high-pressure rotary grouting drill rods 8 are both connected to the pulse booster pump 2, and the two high-pressure rotary grouting drill rods 8 are both externally connected to a high-pressure grouting pump.

[0065] Furthermore, the power assembly 6 includes a vertical driving member 14 vertically fixed on the top of the support frame 3. The vertical driving member 14 is connected to a lateral swinging device 15 that slides up and down. The lateral swinging device 15 is electrically connected to the main control room 101, and the lateral swinging device 15 is transmission-connected to two swinging arms 16 that can swing in the horizontal direction. The lateral swinging device 15 controls the swinging of the two swinging arms 16 through the control signal sent by the main control room 101. The free end of the swing arm 16 is fixed with a power head device 7, and the power head device 7 is transmission-connected to the high-pressure rotary jet drill pipe 8 one-to-one.

[0066] Furthermore, the vertical driving member 14 includes a vertically arranged guide frame 1403, the lateral swing device 15 is movably connected to the guide frame 1403 up and down, and a driving component for driving the lateral swing device 15 to move up and down is arranged in the guide frame 1403.

[0067] Furthermore, the bottom end of the front support frame 3 is rotatably connected to an electric ground anchor 12 , a spiral limiting piece 121 is circumferentially provided on the side wall of the electric ground anchor 12 , and the electric ground anchor 12 is electrically connected to the main control room 101 .

[0068] In this embodiment, the bottom end of the support frame 3 is provided with telescopic support legs 4 located at the front and rear ends of the mobile vehicle 1. The telescopic support legs 4 can be extended and retracted, and can be extended to support the ground at different work locations to ensure the stability of the support frame 3, and to facilitate the adjustment of the level of the support frame 3 to ensure the verticality of the high-pressure rotary jet drill rod 8.

[0069] The bottom end of the axial slot 52 is also connected to the arc slot 53 arranged parallel to the bottom surface of the sleeve hole 51. The two arc slots 53 are centrally symmetrically arranged. The size and shape of the axial slots 52 and the arc slots 53 are adapted to the block 41. When installing, the telescopic support leg 4 needs to be inserted into the sleeve hole 51 and the block 41 is clamped to the bottom end of the corresponding axial slot 52. Then, the support plate 5 is rotated to make the block 41 slide in the arc slot 53. When it slides to the end of the arc slot 53, the installation is completed. The installation is simple and quick, and it is convenient to replace, which greatly improves the replacement efficiency.

[0070] Example 2

[0071] In this embodiment, a dual-axis high-pressure jet grouting device is also used in the construction of jet grouting piles.

[0072] A biaxial high-pressure rotary spraying device, based on the above-mentioned embodiment 1, further defines the overall mechanical connection relationship of the lateral swing device 15 as follows:

[0073] like Figure 4 As shown, the lateral swing device 15 includes a housing 1501, a gear assembly arranged in the housing 1501, and a second motor for driving the gear assembly and electrically connected to the main control room 101. The gear assembly includes a driving gear 17, a transmission gear 18 and a pair of mutually meshing driven gears 19. The driving gear 17 is connected to the second motor in a transmission manner. The transmission gear 18 is respectively meshed with the driving gear 17 and one of the driven gears 19. The two driven gears 19 are both coaxially provided with a rotating sleeve 20, and the two rotating sleeves 20 are respectively fixedly connected to the two swing arms 16.

[0074] Example 3

[0075] In this embodiment, a dual-axis high-pressure jet grouting device is also used in the construction of jet grouting piles.

[0076] A dual-axis high-pressure rotary spraying device, based on the above embodiment 1, further defines the overall mechanical connection relationship of the drive assembly as follows:

[0077] like Figure 3 As shown, the driving assembly includes a screw assembly, which includes a transmission screw 1401 that is rotatably connected to the guide frame 1403 and vertically arranged, and a first motor that drives the transmission screw 1401 to rotate, and the first motor is electrically connected to the main control room 101; a limiting groove 1404 that passes through the side wall of the guide frame 1403 is provided along the length direction on one side of the guide frame 1403 close to the lateral swing device 15, and a vertical moving part 1402 is threadedly sleeved on the transmission screw 1401, and one end of the vertical moving part 1402 extends out of the limiting groove 1404 and is connected to the lateral swing device 15.

[0078] In this embodiment, the transmission screw 1401 is driven to rotate by the first motor, which in turn drives the vertical movable member 1402 threadedly mounted on the transmission screw 1401 to move up and down, thereby driving the lateral swing device 15 to move up and down. The driving component uses the transmission screw 1401 for transmission, which has the advantages of large axial transmission force, self-locking and high positioning accuracy.

[0079] Example 4

[0080] In this embodiment, a dual-axis high-pressure jet grouting device is also used in the construction of jet grouting piles.

[0081] like Figure 7 As shown, a construction process of a dual-axis high-pressure rotary spraying equipment includes the following steps:

[0082] S1: Measurement and setting out: Use the total station to lay out the axis, determine the position of the two jet nozzle piles, and drive steel bars into each jet nozzle pile position;

[0083] S2: Arrange a mixing platform: Arrange a mixing platform near the two jet nozzle piles, and arrange a first-level mixer and a second-level mixer in series on the mixing platform. The first-level mixer is for feeding and mixing, and the second-level mixer is for filtering and mixing. The second-level mixer is connected to a high-pressure grouting pump, and the high-pressure grouting pump is connected to the high-pressure jet drilling rod 8;

[0084] S3: Equipment in place: Move the mobile vehicle 1 to the designated position, adjust the support frame 3 to a horizontal position, and calibrate the support frame 3 with a level ruler to ensure horizontal accuracy. Then, control instructions issued by the main control room 101 control the lateral swing device 15 to adjust the horizontal spacing between the two high-pressure jet grouting drill rods 8 so that the two high-pressure jet grouting drill rods 8 are aligned with the center positions of the two jet grouting nozzles respectively;

[0085] S4: Jet grouting: The high-pressure jet grouting drill rod 8 is lowered to the bottom depth of the pre-drilled hole by the driving assembly. After the two high-pressure jet grouting drill rods 8 reach the bottom depth of the pre-drilled hole, the pressure of the high-pressure grouting pump is increased to 23 MPa, and then the two high-pressure jet grouting drill rods 8 are controlled by the power head device 7 to perform swing grouting or jet grouting. After the two high-pressure jet grouting drill rods 8 have been grouting for 30 seconds, the two high-pressure jet grouting drill rods 8 are kept rotating at a constant speed and the high-pressure jet grouting drill rods 8 are lifted at the same time at a lifting speed of 15 cm / min. Finally, the high-pressure jet grouting drill rods 8 are withdrawn from the jet grouting port pile position;

[0086] In this embodiment, before starting step S4, it is necessary to first check the high-pressure equipment and piping system to ensure that the pressure and displacement during operation meet the design requirements. The sealing rings of various parts of the equipment must be in good condition, and there must be no debris in the channels and nozzles. A high-pressure water jet test must be performed, and the slurry can only be sprayed after passing the test. At the same time, all process parameters of the grouting system must be controlled according to pre-set requirements, and records of the grouting time, grouting volume, slurry bubbling, and pressure changes must be kept at all times.

[0087] At the same time, if a fault occurs during the construction process, the lifting of the high-pressure rotary jet drill rod 8 and the swing jet should be stopped immediately to prevent the rotary jet pile body 9 from being interrupted. At the same time, the fault should be checked and eliminated immediately, and the hole section where the jet grouting is restarted should overlap with the previous section by no less than 500mm to prevent the consolidated body from being disconnected.

[0088] S5: Repeat grouting: Repeat step S4 until the pouring of the jet grouting pile body 9 is completed.

[0089] Furthermore, it also includes step S6: equipment cleaning: after the construction of the jet grouting pile body 9 is completed, the high-pressure grouting pump is connected to a slurry tank filled with clean water, and then the high-pressure grouting pump is turned on to clean the remaining cement slurry in all pipelines, and at the same time clean the soil on the high-pressure jet grouting drill rod 8.

[0090] Furthermore, in step S2, the distance between the high-pressure grouting pump and the two high-pressure jet grouting drill pipes 8 is 50 m.

[0091] Furthermore, in step S3, the centering error of the high-pressure jet grouting drill pipe 8 is no more than 5 cm, and the verticality deviation of the high-pressure jet grouting drill pipe 8 is no more than 1%.

[0092] Example 5

[0093] In this embodiment, a dual-axis high-pressure jet grouting device is also used in the construction of jet grouting piles.

[0094] like Figure 7 As shown, a construction process of a dual-axis high-pressure rotary spraying equipment is the same as that of the fourth embodiment, except that:

[0095] In this embodiment, in step S4, the pressure of the high-pressure grouting pump is 24 MPa; the lifting speed of the two high-pressure jet grouting drill rods 8 is 18 cm / min.

[0096] Furthermore, in step S2, the distance between the high-pressure grouting pump and the two high-pressure jet grouting drill pipes 8 is 30 m.

[0097] Furthermore, in step S3, the verticality deviation of the high-pressure jet grouting drill pipe 8 is no more than 1.25%.

[0098] Example 6

[0099] In this embodiment, a dual-axis high-pressure jet grouting device is also used in the construction of jet grouting piles.

[0100] like Figure 7 As shown, a construction process of a dual-axis high-pressure rotary spraying equipment is the same as that of the fourth embodiment, except that:

[0101] In this embodiment, in step S4, the pressure of the high-pressure grouting pump is 26.5 MPa; the lifting speed of the two high-pressure jet grouting drill rods 8 is 21 cm / min.

[0102] Furthermore, in step S2, the distance between the high-pressure grouting pump and the two high-pressure jet grouting drill pipes 8 is 40 m.

[0103] Furthermore, in step S3, the verticality deviation of the high-pressure jet grouting drill pipe 8 is no more than 1.5%.

[0104] Working principle of the present invention:

[0105] Working method 1: Figure 8 and Figure 10 As shown, the present invention controls the lateral swing device 15, the vertical drive member 14 and the power head device 7 to cooperate with each other through the main control room 101, driving the high-pressure rotary jet drill rod 8 to move up and down, thereby pouring the rotary jet pile body 9 at the designed position, and spraying at different positions is performed by adjusting the high-pressure rotary jet drill rod 8. The two high-pressure rotary jet drill rods 8 rotate in opposite directions. During the spraying process, the high-pressure slurry wraps the large-grained sand and gravel 10 in the soil layer from both sides to form the rotary jet pile body 9. Finally, multiple rotary jet pile bodies 9 and the cast-in-place piles 11 form an interlocking system;

[0106] Working method 2: Figure 9 and Figure 10As shown, the present invention controls the lateral swing device 15, the vertical drive member 14 and the power head device 7 through the main control room 101 to cooperate with each other, thereby driving the high-pressure rotary jet drill rod 8 to move up and down, thereby pouring the rotary jet pile body 9 at the designed position, and spraying at different positions is performed by adjusting the high-pressure rotary jet drill rod 8. The two high-pressure rotary jet drill rods 8 rotate in the same direction. During the spraying process, the high-pressure slurry wraps the large-grained sand and gravel 10 in the soil layer from both sides to form the rotary jet pile body 9. Finally, multiple rotary jet pile bodies 9 and the cast-in-place piles 11 form a bite system.

[0107] In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0108] In the description of the present invention, it should be noted that, unless otherwise specified or limited, the term "connection" should be understood in a broad sense. For example, it can mean a fixed connection, a detachable connection, or an integral connection; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0109] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

Claims

1. A dual-axis high-pressure rotary spraying equipment, characterized in that: The mobile vehicle (1) includes a main control room (101) and a mobile assembly for movement. The mobile vehicle (1) is provided with support frames (3) at both the front and rear ends. A power assembly (6) is provided on the support frame (3) at the front end. The power assembly (6) is connected to two high-pressure jet grouting drill rods (8) in a transmission manner. The power assembly (6) is electrically connected to the main control room (101) for controlling the high-pressure jet grouting drill rods (8) to cast the jet grouting pile body (9). The two high-pressure jet grouting drill rods (8) are both externally connected to a high-pressure grouting pump. The power assembly (6) includes a vertical driving member (14) vertically fixed to the top of the support frame (3), the vertical driving member (14) is slidably connected to a lateral swing device (15) up and down, the lateral swing device (15) is electrically connected to the main control room (101), and the lateral swing device (15) is transmission-connected to two swing arms (16) that can swing in the horizontal direction, the lateral swing device (15) controls the swing of the two swing arms (16) through a control signal sent by the main control room (101), a power head device (7) is fixed to the free end of the swing arm (16), and the power head device (7) is transmission-connected to the high-pressure jet grouting drill pipe (8) in a one-to-one correspondence; The lateral swing device (15) includes a housing (1501), a gear assembly disposed in the housing (1501), and a second motor for driving the gear assembly and electrically connected to the main control room (101), wherein the gear assembly includes a driving gear (17), a transmission gear (18), and a pair of mutually meshing driven gears (19), wherein the driving gear (17) is in transmission connection with the second motor, and the transmission gear (18) is respectively meshed with the driving gear (17) and one of the driven gears (19), and the two driven gears (19) are both coaxially provided with a rotating sleeve (20), and the two rotating sleeves (20) are respectively fixedly connected to the two swing arms (16); The vertical driving member (14) includes a vertically arranged guide frame (1403), the lateral swinging device (15) is movably connected to the guide frame (1403) in an up-and-down manner, and a driving component for driving the lateral swinging device (15) to move up and down is arranged in the guide frame (1403).

2. The dual-axis high-pressure rotary spraying equipment according to claim 1, characterized in that: The bottom end of the front support frame (3) is rotatably connected to an electric ground anchor (12), a spiral limiting piece (121) is circumferentially provided on the side wall of the electric ground anchor (12), and the electric ground anchor (12) is electrically connected to the main control room (101).

3. The dual-axis high-pressure rotary spraying equipment according to claim 1, characterized in that: The mobile vehicle (1) is also provided with a pulse booster pump (2), and the two high-pressure jet drilling rods (8) are both connected to the pulse booster pump (2).

4. A construction process based on the dual-axis high-pressure rotary spraying equipment according to any one of claims 1 to 3, characterized in that: The steps include: S1: Measurement and setting out: Use the total station to lay out the axis, determine the position of the two jet nozzle piles, and drive steel bars into each jet nozzle pile position; S2: Arrange a mixing platform: Arrange a mixing platform near the two jet nozzle piles, and arrange a first-stage mixer and a second-stage mixer in series on the mixing platform. The first-stage mixer is for feeding and stirring, and the second-stage mixer is for filtering and stirring. The second-stage mixer is connected to a high-pressure grouting pump, and the high-pressure grouting pump is connected to a high-pressure jet drilling rod (8); S3: Equipment in place: Move the mobile vehicle (1) to the designated position, and adjust the support frame (3) to a horizontal position, and then control the lateral swing device (15) through the control command issued by the main control room (101) to adjust the horizontal distance between the two high-pressure jet drill rods (8), so that the two high-pressure jet drill rods (8) are respectively aligned with the center position of the two jet nozzle pile positions; S4: rotary grouting: the high-pressure rotary grouting drill rod (8) is lowered to the bottom depth of the pre-drilled hole by the driving assembly. After the two high-pressure rotary grouting drill rods (8) reach the bottom depth of the pre-drilled hole, the pressure of the high-pressure grouting pump is increased to the construction design value, and then the two high-pressure rotary grouting drill rods (8) are controlled by the power head device (7) to perform swing grouting or rotary grouting. After the two high-pressure rotary grouting drill rods (8) have been grouting for a period of time, the two high-pressure rotary grouting drill rods (8) are kept rotating at a uniform speed and the high-pressure rotary grouting drill rods (8) are lifted at the same time, and finally the high-pressure rotary grouting drill rods (8) are withdrawn from the rotary grouting port pile position; S5: Repeat grouting: Repeat step S4 until the pouring of the rotary jet pile body (9) is completed.

5. The construction process of the dual-axis high-pressure rotary spraying equipment according to claim 4 is characterized in that: The process also includes step S6: cleaning of equipment: after the jet grouting pile body (9) is completed, the high-pressure grouting pump is connected to a slurry tank filled with clean water, and then the high-pressure grouting pump is turned on to clean the remaining cement slurry in all pipelines and clean the soil on the high-pressure jet grouting drill rod (8).

6. The construction process of the dual-axis high-pressure rotary spraying equipment according to claim 4 is characterized in that: In step S2, the distance between the high-pressure grouting pump and the two high-pressure jet grouting drill pipes (8) does not exceed 50m.

7. The construction process of the dual-axis high-pressure rotary spraying equipment according to claim 4 is characterized in that: In step S3, the centering error of the high-pressure jet grouting drill rod (8) is no more than 5 cm, and the verticality deviation of the high-pressure jet grouting drill rod (8) is no more than 1.5%.

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