A cement-soil mixing pile construction device for foundation pit support

Abstract

This application relates to a cement-soil mixing pile construction device for foundation pit support, belonging to the field of foundation pit support technology. To solve the problem of base swaying and shifting during construction, affecting operational stability, the device includes a base. A lifting mechanism is connected to the top of the base, and a support frame is installed on one side of the lifting mechanism. The support frame is connected to the top of the base, and a drive mechanism is fixedly installed on one side of the support frame. A mixing mechanism is connected to the bottom of the drive mechanism, and a splash-proof mechanism is fixedly installed on one side of the support frame. This application improves the contact effect between the base and the ground, and facilitates the stability of the lifting mechanism and mixing mechanism at the top of the base through pressure airbags on both sides and pressure plates.

Description

Technical Field

[0001] This application relates to the field of foundation pit support technology, and in particular to a cement-soil mixing pile construction device for foundation pit support. Background Technology

[0002] With the development of science and technology, the foundation reinforcement technology of the construction industry has also been developed. In the process of foundation pit reinforcement, cement-soil mixing piles are needed during the foundation pit construction. Cement-soil mixing piles are a method for reinforcing saturated soft clay foundations. They use cement as a curing agent and use specially designed mixing machinery to forcibly mix the soft soil and curing agent deep in the foundation. The series of physical and chemical reactions between the curing agent and the soft soil cause the soft soil to harden into a high-quality foundation with integrity, water stability and a certain strength.

[0003] Chinese patent CN1274911C discloses a construction machinery device suitable for soft soil foundation treatment. This mixer consists of a machine body, a power transmission system, an outer drill rod, an inner drill rod, and a drill bit. The power transmission system is located at the upper part of the machine body, the inner drill rod is located within the outer drill rod, and the inner drill rod is connected to the power transmission system connecting flange. The outer drill rod is connected to the power transmission system connecting flange, and the drill bit is located at the lower part of the inner drill rod. This machine is convenient to construct, simple to operate, and easy to master. The dual-shaft bidirectional rotation drives two sets of mixing blades to rotate simultaneously in both directions, ensuring the amount of cement slurry incorporated into the pile body and preventing slurry overflow. However, in actual use, the base is often pressed together using hydraulic equipment, which can easily cause the base to shake and shift during construction, affecting its stability. Summary of the Invention

[0004] To improve the stability of the base during construction, this application provides a cement-soil mixing pile construction device for foundation pit support.

[0005] This application provides a cement-soil mixing pile construction device for foundation pit support, which adopts the following technical solution:

[0006] A cement-soil mixing pile construction device for foundation pit support.

[0007] Including the base;

[0008] A support frame is mounted on the base;

[0009] A lifting mechanism is mounted on the base to support the support frame;

[0010] The stirring mechanism is mounted on the support frame;

[0011] A splash-proof mechanism is provided around the stirring mechanism;

[0012] and support mechanisms provided on both sides of the base;

[0013] The base has a receiving cavity, and the support mechanism includes a support plate that is slidably disposed in the receiving cavity. The support plate has an inclined surface, and a pressure airbag for contacting the ground is connected to the bottom of the support plate. A movable wheel is attached to the inclined surface of the support plate, and a first guide rod is fixedly connected to one side of the movable wheel. The first guide rod passes through the side wall of the receiving cavity and is fixedly connected to a drive plate. The drive plate has an inclined surface.

[0014] A slide block is fixedly connected to the side wall of the base, and a hydraulic cylinder is connected to the bottom of the slide block. A pressure plate is fixedly connected to the telescopic end of the hydraulic cylinder, and a slide rod is vertically connected to the pressure plate. A pulley is connected to the side wall of the slide rod away from the pressure plate, and the pulley is in contact with the inclined surface of the drive plate. When the telescopic end of the hydraulic cylinder extends vertically downward, the support plate can move downward.

[0015] By adopting the above technical solution, when the telescopic end of the hydraulic rod extends, it applies pressure to the pressing plate, causing the pressing plate to move downward and press against the ground. At this point, the pulley moves downward on the inclined surface of the drive plate, thereby generating a lateral compressive force on the drive plate. This, in turn, pushes the first guide rod toward the receiving cavity, thereby pushing the moving wheel to move within the receiving cavity. When the moving wheel moves on the inclined surface of the support plate, it applies a vertical downward compressive force to the moving plate. The moving plate then applies pressure to the pressure airbag, causing the pressure airbag to press against the ground. By synchronously moving downward on the pressing plate and the pressure airbag, the contact effect between the base and the ground can be improved, which is beneficial for ensuring the stability of the lifting mechanism and stirring mechanism at the top of the base through the pressure airbag and the pressing plate.

[0016] Preferably, a mounting plate is fixedly connected to the top of the pressure airbag, and a movable rod is fixedly connected to the side of the mounting plate away from the pressure airbag. The end of the movable rod away from the mounting plate slides through the bottom wall of the receiving cavity and is fixedly connected to the bottom of the support plate. A second guide rod is fixedly connected to both sides of the top of the mounting plate, and the end of the second guide rod away from the mounting plate slides through the bottom wall of the receiving cavity.

[0017] By adopting the above technical solution, when the moving plate moves downward, it can apply vertical downward pressure to the moving rod and the second guide rod, thereby pushing the mounting plate downward. The mounting plate has a large contact area with the pressure airbag, which can make the bottom of the pressure airbag press firmly against the ground, thereby enhancing the stability of the base.

[0018] Preferably, the second guide rod is fitted with a spring, and the two ends of the spring are fixedly connected to the top of the mounting plate and the bottom of the base, respectively.

[0019] By adopting the above technical solution, when the moving plate is no longer subjected to the squeezing force of the moving wheel, the spring can reset the second guide rod, so that both the second guide rod and the mounting plate can move vertically upward.

[0020] Preferably, the lifting mechanism includes an adjusting cylinder, a first hinge seat is fixedly connected to the top plate of the base, one end of the adjusting cylinder is rotatably connected to the first hinge seat, a second hinge seat is fixedly connected to the side wall of the support frame, the piston rod end of the adjusting cylinder is hinged to the second hinge seat, and a lateral support cylinder is hinged to one side of the adjusting cylinder body via a pin, the piston rod end of the lateral support cylinder being rotatably connected to one side of the bottom of the support frame.

[0021] By adopting the above technical solution, when the adjusting cylinder is working, it can drive the front hinged support frame to move around the base, and when the lateral support cylinder is working, it can further unfold to support the support frame, thereby facilitating and quickly assembling and connecting the stirring mechanism and the drive mechanism, which is beneficial to improving the processing adaptability and meeting the usage requirements.

[0022] Preferably, the stirring mechanism includes a stirring shaft, and the support frame is provided with a drive mechanism for driving the stirring shaft to rotate. The top end of the stirring shaft is detachably connected to the drive mechanism, and a stirring auger is fixedly connected to the outer wall of the stirring shaft.

[0023] By adopting the above technical solution, the mixing shaft combined with the mixing auger helps to improve drilling efficiency, and the mixing shaft and the drive structure can be detachably connected, which is beneficial for replacing the damaged mixing shaft.

[0024] Preferably, the outer wall of the stirring auger is provided with several drainage grooves equidistantly around the axis, and a drill bit seat is fixedly installed at the end of the stirring auger away from the drive mechanism. The bottom of the drill bit seat is fixedly connected to the drill bit body, and several teeth are fixedly installed on the outer wall of the drill bit body.

[0025] By adopting the above technical solution, the drainage tank can spray the curing agent onto the side wall of the bored pile through centrifugal force when the stirring auger rotates, thereby reinforcing the bored pile. In addition, the drill bit body installed on the toothed part can protect the drill bit body and reduce the probability of damage to the drill bit body.

[0026] Preferably, an overflow groove is provided at the tip of the tooth, the overflow groove has an arc-shaped cross-section, and a stroke groove is provided in the middle of the outer side of the tooth. A limiting bolt for fixing the tooth is inserted in the stroke groove, and one end of the limiting bolt that passes through the stroke groove is detachably connected to the drill bit body.

[0027] By adopting the above technical solution, the overflow groove design facilitates the drainage of water from the drill bit, reducing the impact on the reinforcement of the pile hole sidewall. The tooth section is detachably connected to the drill bit body via a limiting bolt, allowing for quick replacement of the tooth section when damaged, thus enhancing the applicability of the mixing mechanism.

[0028] Preferably, the splash-proof mechanism includes a protective cover, a cleaning seat fixedly connected to the bottom of the protective cover, a fixed seat fixedly connected to the bottom of the cleaning seat, a through hole for the stirring shaft to pass through on the fixed seat, a side of the fixed seat slidably connected to a side of the support frame, a splash-proof cover rotatably connected to the bottom of the fixed seat, a through groove for the stirring shaft to pass through on the cleaning seat, and a plurality of nozzles fixedly connected around the side wall of the through groove.

[0029] By adopting the above technical solution, when there is too much mud on the mixing auger, the nozzle can spray water to wash the mixing auger, thereby improving the cleanliness of the mixing auger during operation.

[0030] Preferably, the fixed base has an inner cavity, one end of the splash shield passes through the bottom wall of the inner cavity and is rotatably connected to the side wall of the inner cavity, a driven gear is fixedly connected to the outer wall of the splash shield, a drive motor is fixedly fixed in the inner cavity, a drive gear that meshes with the driven gear is fixedly connected to the output end of the drive motor, and a connecting pad is fixedly connected to the outer wall of the splash shield, the connecting pad being in contact with the bottom wall of the fixed base.

[0031] By adopting the above technical solution, when the drive motor rotates, it drives the drive gear to rotate, which in turn drives the driven gear meshing with the drive gear to rotate, causing the splash guard to rotate and clean the mud attached to the splash guard. In addition, the connecting gasket can enhance the airtightness of the inner cavity and reduce the possibility of mud entering the inner cavity.

[0032] Preferably, the splash guard is provided with a plurality of overflow holes around its perimeter.

[0033] By adopting the above technical solution, the splash guard can block soil splashing while the curing agent discharged from the drainage tank splashes out from the overflow hole through centrifugal force, thus curing the side wall of the pile hole.

[0034] In summary, this application includes at least one of the following beneficial technical effects:

[0035] 1. By moving the pressing plate and the pressure airbag downwards synchronously, the contact effect between the base and the ground can be improved, which is beneficial to ensuring the stability of the lifting mechanism and the stirring mechanism at the top of the base through the pressure airbag and the pressing plate.

[0036] 2. The overflow groove design facilitates the drainage of water from the drill bit, reducing the impact on the reinforcement of the pile hole sidewall. The drill bit is detachably connected to the drill bit body via a limiting bolt, allowing for quick replacement of the drill bit when damaged, thus enhancing the applicability of the mixing mechanism.

[0037] 3. When the drive motor rotates, it drives the drive gear to rotate, which in turn drives the driven gear meshing with the drive gear to rotate, causing the splash guard to rotate and clean the mud attached to the splash guard. The connecting gasket can enhance the airtightness of the inner cavity and reduce the possibility of mud entering the inner cavity. Attached Figure Description

[0038] Figure 1 This is a partial sectional view of the overall structure of an embodiment of this application;

[0039] Figure 2 This is an enlarged schematic diagram of the support structure according to an embodiment of this application;

[0040] Figure 3 yes Figure 1 Enlarged view of point A in the middle;

[0041] Figure 4 yes Figure 1 And an enlarged diagram of point B;

[0042] Figure 5 This is a schematic diagram of the splash-proof mechanism according to an embodiment of this application;

[0043] Figure 6 yes Figure 1 Enlarged diagram of point C in the middle.

[0044] Explanation of reference numerals in the attached drawings: 1. Base; 11. Receiving cavity; 2. Lifting mechanism; 201. Adjusting cylinder; 202. Lateral support cylinder; 203. First hinge seat; 204. Second hinge seat; 3. Support frame; 4. Drive mechanism; 5. Stirring mechanism; 501. Stirring shaft; 502. Stirring auger; 503. Drainage trough; 504. Drill bit holder; 505. Drill bit body; 506. Tooth section; 507. Stroke groove; 508. Limiting bolt; 509. Overflow trough; 6. Splash prevention mechanism; 601. Protective cover; 602. Cleaning seat; 603. Nozzle; 604. Fixed... 605. Fixed seat; 606. Splash guard; 607. Through hole; 608. Overflow hole; 609. Connecting pad; 610. Drive gear; 611. Drive motor; 612. Through groove; 7. Support mechanism; 701. Hydraulic cylinder; 702. Pressing plate; 703. Slide seat; 704. Slide rod; 705. Pulley; 706. Drive plate; 707. First guide rod; 708. Moving wheel; 709. Support plate; 710. Moving rod; 711. Mounting plate; 712. Pressure bladder; 713. Second guide rod; 714. Spring; 715. Abutment plate. Detailed Implementation

[0045] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0046] This application discloses a cement-soil mixing pile construction device for foundation pit support. (Refer to...) Figure 1 The system includes a base 1, a lifting mechanism 2 on the top of the base 1, a support frame 3 on one side of the lifting mechanism 2, the support frame 3 being located on the top of the base 1, a vertical track on the side of the support frame 3 away from the lifting mechanism 2, a drive mechanism 4 slidably mounted on the side of the support frame 3 away from the lifting mechanism 2, a stirring mechanism 5 at the bottom of the drive mechanism 4, a splash guard 6 slidably mounted on the side of the support frame 3 away from the lifting mechanism 2, the bottom of the stirring mechanism 5 passing through the splash guard 6, and support mechanisms 7 fixedly mounted on both sides of the base 1.

[0047] Reference Figure 1 and Figure 2 The base 1 has cavities 11 on both sides near the bottom. The support mechanism 7 includes two pressure airbags 712 located below the base 1 and corresponding to the positions of the cavities 11. The two pressure airbags 712 are arranged side by side. A disc-shaped mounting plate 711 is fixedly connected to the side of the pressure airbag 712 near the base 1. A moving rod 710 is vertically fixedly connected to the center of the side of the mounting plate 711 away from the pressure airbag 712. The end of the moving rod 710 away from the mounting plate 711 passes through the wall of the cavity 11 and enters the cavity 11. A support plate 709 is fixedly connected to the end of the moving rod 710 inside the cavity 11. The side of the support plate 709 away from the moving rod 710 is an inclined surface. The movable rod 710 has a second guide rod 713 fixedly connected to the mounting plate 711 on both sides. The bottom wall of the receiving cavity 11 has a through hole for the second guide rod 713 to slide through. The end of the second guide rod 713 located in the receiving cavity 11 is connected to an abutment plate 715. The abutment plate 715 is disc-shaped and its diameter is larger than the through hole. A spring 714 is sleeved on the second guide rod 713. One end of the spring 714 is fixedly connected to the mounting plate 711, and the other end of the spring 714 is connected to the bottom of the base 1.

[0048] Reference Figure 1 and Figure 3The base 1 has slide blocks 703 fixedly connected to both side walls. A hydraulic cylinder 701 is fixedly connected to the bottom of the slide block 703. The telescopic end of the hydraulic cylinder 701 faces vertically to the ground and is fixedly connected to a pressing plate 702. A slide rod 704 is vertically connected to the pressing plate 702. A sliding hole is provided on the slide block 703 for the slide rod 704 to slide through. A support is fixedly connected to the side wall of the slide rod 704 away from the pressing plate 702. A pulley 705 is rotatably connected in the support. A through hole is provided on the side wall of the receiving cavity 11, which connects the receiving cavity 11 to the outside. A first guide rod 707 is inserted through the through hole. One end of the first guide rod 707 located in the receiving cavity 11 is connected to a movable wheel 708. The outer ring of the movable wheel 708 is in contact with the inclined surface of the support plate 709. The other end of the first guide rod 707 away from the movable wheel 708 is fixedly connected to a drive plate 706. An inclined surface is provided on the drive plate 706, and the outer ring of the pulley 705 is in contact with the inclined surface on the drive plate 706.

[0049] When cement-soil mixing pile construction is required, extending the telescopic rod of hydraulic cylinder 701 first moves the pressing plate 702 downward to press against the ground, and simultaneously moves the base 1 upward. At this time, the sliding rod 704 will move in the opposite direction to the drive plate 706. The pulley 705 moves downward on the inclined surface of the drive plate 706, thereby pushing the drive plate 706 closer to the base 1. Due to the limiting effect of the through hole sidewall, the first guide rod 707 can only move laterally. When the drive plate 706 moves, it pushes the first guide rod 707 towards the receiving cavity 11, thereby pushing the moving wheel 708 to move on the inclined surface of the support plate 709. When the moving wheel 708 moves on the inclined surface of the support plate 709, it squeezes the support plate 709 downward, thereby generating vertical downward pressure on the moving rod 710, thereby pressing the mounting plate 711 and the pressure airbag 712 downward simultaneously. When the support plate 709 moves down to abut the abutment plate 715, the support plate 709 simultaneously applies pressure to the abutment plate 715, which in turn applies pressure to the mounting plate 711 via the second guide rod 713, causing the pressure airbag 712 to move down. When the pressing plate 702 and the pressure airbag 712 move down synchronously, the contact effect between the base 1 and the ground is improved, which helps to ensure the stability of the lifting mechanism 2 and the stirring mechanism 5 at the top of the base 1 through the pressure airbags 712 on both sides and the pressing plate 702.

[0050] Reference Figure 1 The lifting mechanism 2 includes an adjusting cylinder 201. A first hinge seat 203 is fixedly connected to the top plate of the base 1. One end of the adjusting cylinder 201 is rotatably connected to the first hinge seat 203. A second hinge seat 204 is fixedly connected to the side wall of the support frame 3. The piston rod end of the adjusting cylinder 201 is hinged to the second hinge seat 204. A lateral support cylinder 202 is hinged to one side of the cylinder body of the adjusting cylinder 201 through a pin. The piston rod end of the lateral support cylinder 202 is rotatably connected to one side of the bottom of the support frame 3.

[0051] When the middle section of the support frame 3 is added, the piston end of the adjusting cylinder 201 extends, and the angle between the adjusting cylinder 201 and the base 1 changes, causing the adjusting cylinder 201 to rotate between the base 1 and the support frame 3, thereby supporting the support frame 3. The lateral support cylinder 202 adapts to the position change of the adjusting cylinder 201, thereby supporting and reinforcing the adjusting cylinder 201.

[0052] Reference Figure 1 and Figure 4 The stirring mechanism 5 includes a stirring shaft 501. A servo motor is mounted on the drive mechanism 4 to drive the stirring shaft 501 to rotate. One end of the stirring shaft 501 is detachably connected to the drive end of the servo motor. A stirring auger 502 is spirally fixedly connected to the outer wall of the stirring shaft 501. Multiple drainage grooves 503 are equidistantly arranged around the outer wall of the stirring auger 502 along the axis. A drill bit holder 504 is fixedly installed at the end of the stirring shaft 501 away from the drive mechanism 4. A drill bit body 505 is fixedly connected to the side of the drill bit holder 504 opposite to the stirring shaft 501. Several toothed portions 506 are fixedly connected to the outer wall of the drill bit body 505. An overflow groove 509 is formed at the tip of the toothed portion 506, and the cross-sectional shape of the overflow groove 509 is arc-shaped. A travel groove 507 is provided in the middle of the tooth section 506. A limit plug 508 is inserted in the travel groove 507. One end of the limit plug 508 passes through the travel groove 507 and is detachably connected to the drill bit body 505.

[0053] The drive mechanism 4 drives the mixing shaft 501 to rotate, thereby causing the mixing auger 502 to rotate. While the mixing auger 502 rotates, the curing agent is simultaneously discharged from the drainage tank 503. The rotation of the mixing auger 502 also centrifugally flings the curing agent and soil outwards, facilitating cement-soil reinforcement. During the rotation of the mixing shaft 501, the toothed part 506 contacts the ground first, reducing damage to the mixing shaft 501 and the drill bit body 505. The overflow tank 509 is designed to facilitate the drainage of water from the drill bit, reducing the impact on the reinforcement of the pile hole sidewall. The toothed part 506 is detachably connected to the drill bit body 505 via a limiting bolt 508, allowing for quick replacement of the toothed part 506 when damaged, enhancing the applicability of the mixing mechanism 5.

[0054] Reference Figure 1 The splash-proof mechanism 6 includes a fixed seat 604 that is slidably connected to a track on one side of the support frame 3.

[0055] Reference Figure 5 and Figure 6The fixed base 604 has a through hole 606 for the stirring shaft 501 and the stirring auger 502 to pass through. A cleaning seat 602 is fixedly connected to the fixed base 604, and a protective cover 601 is provided on the side of the cleaning seat 602 away from the fixed base 604. A through groove 612 of the same size as the through hole 606 and connected to it is provided on the through groove 606. Several nozzles 603 are fixedly connected around the peripheral wall of the through groove 612. The protective cover 601 is provided on the side of the cleaning seat 602 away from the fixed base 604. A splash guard 605 is rotatably connected to the side of the fixed base 604 away from the cleaning seat 602. An inner cavity is provided inside the fixed base 604. One end of the splash guard 605 is inserted into the inner cavity and rotatably connected to one side of the inner cavity wall through a bearing. A driven gear 609 is fixedly connected to the side of the splash shield 605 located in the inner cavity away from the bearing. A drive motor 611 is fixedly connected to the inner wall of the inner cavity away from the bottom wall of the fixed base 604. A drive gear 610 is fixedly connected to the output shaft of the drive motor 611, and the drive gear 610 meshes with the driven gear 609. A connecting pad 608 is fixedly connected to the outer wall of the splash shield 605 located outside the inner cavity. The end of the connecting pad 608 is in contact with the bottom wall of the fixed base 604. Several overflow holes 607 are formed around the splash shield 605.

[0056] When the stirring shaft 501 rotates, the curing agent discharged from the drain tank 503 splashes out from the overflow hole 607 under the action of centrifugal force, and cures the side wall of the pile hole. Furthermore, when the slurry splashes outward due to centrifugal force, the water can be blocked by the splash shield 605. When a large amount of slurry adheres to the inner wall of the splash shield 605, the output shaft of the drive motor 611 can rotate to drive the drive gear 610. The rotation of the drive gear 610 can drive the driven gear 609 to rotate. Since the inner cavity sidewall is connected to the splash shield 605 through bearings, the rotation of the driven gear 609 can drive the splash shield 605 to rotate in the inner cavity, thereby shaking off the slurry on the inner wall of the splash shield 605. This reduces the adhesion of the slurry on the inner wall of the splash shield 605 to the outside of the agitator 502, improving the stability of the agitator 502. In addition, through the designed nozzle 603 and the fixed seat 604, the nozzle 603 can wash the mud adhering to the outside of the agitator 502 after the external water is pumped in, thereby improving the cleanliness of the working state.

[0057] The implementation principle of a cement-soil mixing pile construction device for foundation pit support according to an embodiment of this application is as follows: When cement-soil mixing pile construction is required, when the telescopic rod of the hydraulic cylinder 701 is extended, it first drives the pressing plate 702 to move downward and press against the ground, and at the same time, it drives the base 1 to move upward. At this time, the sliding rod 704 will move in the opposite direction to the drive plate 706. The pulley 705 moves downward on the inclined surface of the drive plate 706, thereby pushing the drive plate 706 to move closer to the base 1. When the drive plate 706 moves, it will push the first guide rod 707 to move towards the receiving cavity 11, and then push the moving wheel 708 to move on the inclined surface of the support plate 709. When the moving wheel 708 moves on the inclined surface of the support plate 709, it squeezes the support plate 709 downward, thereby generating vertical downward pressure on the moving rod 710. When the support plate 709 moves down to abut the abutment plate 715, the support plate 709 simultaneously applies pressure to the abutment plate 715, and the second guide rod 713 and the moving rod 710 simultaneously apply pressure to the mounting plate 711, causing the pressure airbag 712 to move downward. When the pressing plate 702 and the pressure airbag 712 move downward synchronously, the contact effect between the base 1 and the ground can be improved, which is beneficial to ensuring the stability of the lifting mechanism 2 and the stirring mechanism 5 at the top of the base 1 through the pressure airbags 712 on both sides and the pressing plate 702.

[0058] When the stirring shaft 501 rotates, the curing agent discharged from the drainage tank 503 splashes out from the overflow hole 607 under the action of centrifugal force, curing the sidewall of the pile hole. Furthermore, when the stirring mud splashes outward due to centrifugal force, the water can be blocked by the splash shield 605. When a large amount of mud adheres to the inner wall of the splash shield 605, the output shaft of the drive motor 611 rotates, driving the drive gear 610 to rotate. The rotation of the drive gear 610 drives the driven gear 609 to rotate, which in turn causes the splash shield 605 to rotate within its inner cavity, thus dislodging the mud from the inner wall of the splash shield 605.

[0059] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A cement-soil mixing pile construction device for foundation pit support, characterized in that, include: Base (1); A support frame (3) is mounted on the base (1); A lifting mechanism (2) is provided on the base (1) to support the support frame (3). A stirring mechanism (5) is mounted on the support frame (3); A splash-proof mechanism (6) is provided around the stirring mechanism (5); And support mechanisms (7) provided on both sides of the base (1); The base (1) has a receiving cavity (11). The support mechanism (7) includes a support plate (709) slidably disposed in the receiving cavity (11). The support plate (709) has an inclined surface. The bottom of the support plate (709) is connected to several pressure airbags (712) for contacting the ground. A moving wheel (708) is attached to the inclined surface of the support plate (709). A first guide rod (707) is fixedly connected to one side of the moving wheel (708). The first guide rod (707) passes through the side wall of the receiving cavity (11) and is fixedly connected to a drive plate (706). The drive plate (706) has an inclined surface. The top of the pressure airbags (712) is fixedly connected to... A mounting plate (711) is attached, and a movable rod (710) is fixedly connected to the side of the mounting plate (711) away from the pressure airbag (712). The end of the movable rod (710) away from the mounting plate (711) slides through the bottom wall of the receiving cavity (11) and is fixedly connected to the bottom of the support plate (709). A second guide rod (713) is fixedly connected to both sides of the top of the mounting plate (711). The end of the second guide rod (713) away from the mounting plate (711) slides through the bottom wall of the receiving cavity (11). A spring (714) is sleeved on the second guide rod (713). The two ends of the spring (714) are fixedly connected to the top of the mounting plate (711) and the bottom of the base (1) respectively. The base (1) is fixedly connected to a slide (703) on its side wall. A hydraulic cylinder (701) is connected to the bottom of the slide (703). A pressing plate (702) is fixedly connected to the telescopic end of the hydraulic cylinder (701). A sliding rod (704) is vertically connected to the pressing plate (702). A pulley (705) is connected to the side wall of the sliding rod (704) away from the pressing plate (702). The pulley (705) is in contact with the inclined surface of the drive plate (706). When the telescopic end of the hydraulic cylinder (701) extends vertically downward, the support plate (709) can move downward.

2. The cement-soil mixing pile construction equipment for foundation pit support according to claim 1, characterized in that, The lifting mechanism (2) includes an adjusting cylinder (201), a first hinge seat (203) is fixedly connected to the top plate of the base (1), one end of the adjusting cylinder (201) is rotatably connected to the first hinge seat (203), a second hinge seat (204) is fixedly connected to the side wall of the support frame (3), the piston rod end of the adjusting cylinder (201) is hinged to the second hinge seat (204), and a lateral support cylinder (202) is hinged to one side of the cylinder body of the adjusting cylinder (201) by a pin, and the piston rod end of the lateral support cylinder (202) is rotatably connected to one side of the bottom of the support frame (3).

3. The cement-soil mixing pile construction equipment for foundation pit support according to claim 1, characterized in that, The stirring mechanism (5) includes a stirring shaft (501), and a driving mechanism (4) for driving the stirring shaft (501) to rotate is provided on the support frame (3). The top end of the stirring shaft (501) is detachably connected to the driving mechanism (4), and a stirring auger (502) is fixedly connected to the outer wall of the stirring shaft (501).

4. The cement-soil mixing pile construction equipment for foundation pit support according to claim 3, characterized in that, The outer wall of the stirring auger (502) is provided with several drainage grooves (503) at equal intervals around the axis. A drill bit seat (504) is fixedly installed at one end of the stirring auger (502) away from the drive mechanism (4). A drill bit body (505) is fixedly connected to the bottom of the drill bit seat (504). Several teeth (506) are fixedly installed on the outer wall of the drill bit body (505).

5. The cement-soil mixing pile construction equipment for foundation pit support according to claim 4, characterized in that, An overflow groove (509) is provided at the tip of the tooth part (506). The overflow groove (509) has an arc-shaped cross-section. A stroke groove (507) is provided in the middle of the outer side of the tooth part (506). A limiting bolt (508) for fixing the tooth part (506) is provided in the stroke groove (507). One end of the limiting bolt (508) passing through the stroke groove (507) is detachably connected to the drill bit body (505).

6. The cement-soil mixing pile construction equipment for foundation pit support according to claim 3, characterized in that, The splash-proof mechanism (6) includes a protective cover (601), a cleaning seat (602) is fixedly connected to the bottom of the protective cover (601), a fixed seat (604) is fixedly connected to the bottom of the cleaning seat (602), a through hole (606) is provided on the fixed seat (604) for the stirring shaft (501) to pass through, one side of the fixed seat (604) is slidably connected to one side of the support frame (3), a splash-proof cover (605) is rotatably connected to the bottom of the fixed seat (604), a through groove (612) is provided on the cleaning seat (602) for the stirring shaft (501) to pass through, and a number of nozzles (603) are fixedly connected around the side wall of the through groove (612).

7. The cement-soil mixing pile construction equipment for foundation pit support according to claim 6, characterized in that, The fixed base (604) has an inner cavity. One end of the splash shield (605) passes through the bottom wall of the inner cavity and is rotatably connected to the side wall of the inner cavity. A driven gear (609) is fixedly connected to the outer wall of the splash shield (605). A drive motor (611) is fixed in the inner cavity. A drive gear (610) that meshes with the driven gear (609) is fixedly connected to the output end of the drive motor (611). A connecting pad (608) is fixedly connected to the outer wall of the splash shield (605). The connecting pad (608) is in contact with the bottom wall of the fixed base (604).

8. The cement-soil mixing pile construction equipment for foundation pit support according to claim 7, characterized in that, The splash guard (605) is provided with a plurality of overflow holes (607) around its perimeter.

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