A cement-soil mixing pile combined with high-pressure jet grouting pile enclosure structure and method thereof

Abstract

The present invention relates to the technical field of foundation pit enclosure, and specifically to a cement-soil mixing pile combined high-pressure rotary jet pile enclosure structure and method thereof, comprising a mobile vehicle, a lifting mechanism is arranged on the upper part of the mobile vehicle, a mobile platform is arranged on the upper part of the lifting mechanism, a vertical frame is fixedly installed on the left side of the mobile platform, a transmission chain is arranged on the right side of the vertical frame, an execution motor is arranged on the left side of the vertical frame for sliding up and down, the execution motor is fixedly connected to the transmission chain, a trimming mechanism for trimming the foundation pit hole wall is arranged at the lower part of the execution motor, and a positioning mechanism for auxiliary positioning of the rotary jet pile position is arranged on the left side of the vertical frame. The present invention adopts a pressing component to press the foundation pit hole wall drilled by a drilling rig, so that the soil on the foundation pit hole wall is relatively compact, avoiding the blockage of the nozzle of the grouting pipe by the soil, ensuring the same grouting amount of each nozzle, and ensuring the construction quality of the high-pressure rotary jet pile.

Description

Technical Field

[0001] The invention relates to the technical field of foundation pit enclosure, and in particular to a cement-soil mixing pile combined high-pressure rotary jetting pile enclosure structure and a method thereof. Background Art

[0002] The retaining structure of cement-soil mixing piles combined with high-pressure rotary jet piles is a foundation pit support technology that combines the advantages of cement-soil mixing piles and high-pressure rotary jet piles. The combination of these two pile types can utilize the impermeability of cement-soil mixing piles and the high strength of high-pressure rotary jet piles to form a foundation pit support structure that can both retain soil and prevent water.

[0003] When the foundation pit is deep or the surrounding environment has high requirements for deformation and waterproofing, an underground continuous wall is usually constructed. The underground continuous wall is a reinforced concrete wall used in underground projects. It is usually used to support the surrounding soft soil layer and retain water. The side walls of the foundation pit are supported by cement-soil mixing piles, and the gap between the cement-soil mixing piles and the underground continuous wall is blocked by high-pressure rotary jet piles to ensure the waterproofness of the foundation pit.

[0004] In the prior art, the skipping pile method is usually used for the construction of overlapping cement-soil mixing piles and high-pressure rotary jet piles. The basic principle of the skipping pile method is to construct a part of the piles first, and then construct the remaining piles after these piles reach a certain strength. This method can avoid the adverse effect of the construction of adjacent piles on the strength of the constructed piles, thereby ensuring the overall stability and bearing capacity of the pile foundation.

[0005] At present, when constructing high-pressure rotary jet piles between cement-soil mixing piles and underground continuous walls, the foundation pit is first drilled by a drilling rig, and then a grouting pipe with a nozzle is extended into the hole. The slurry is then sprayed out in the form of a high-pressure flow to destroy the soil and mix it with the slurry to form a reinforced body with a certain strength and anti-seepage ability.

[0006] However, in the above-mentioned construction method, after the drilling rig drills the hole in the foundation pit, the soil on the wall of the hole in the foundation pit is relatively loose, so that when the grouting pipe is extended into the hole, the soil on the inner wall of the hole in the foundation pit is easy to fall off, thereby causing the soil to block the nozzle of the grouting pipe, resulting in different grouting amounts of each nozzle, and further resulting in uneven distribution of slurry inside the high-pressure rotary jet pile, affecting the quality of the high-pressure rotary jet pile, and when the slurry is overlapped with the completed high-pressure rotary jet pile, the slurry is blocked by the soil, so that the combination effect of the slurry and the completed high-pressure rotary jet pile is poor, thereby making the performance of the overlap of the two overlapping high-pressure rotary jet piles poor, thereby affecting the overall construction quality. In addition, in order to ensure that the overlapping area of ​​the high-pressure rotary jet pile is the same as that of other high-pressure rotary jet piles on both sides of it, construction is usually carried out in the center position between the two high-pressure rotary jet piles. However, in the prior art, the method of first measuring and positioning and then moving the drilling rig for construction is adopted, which makes the construction steps more cumbersome and prone to positioning errors. Summary of the invention

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: a cement-soil mixing pile combined high-pressure rotary jet pile retaining structure, including a mobile vehicle, a lifting mechanism is arranged on the upper part of the mobile vehicle, a mobile platform is arranged on the upper part of the lifting mechanism, a vertical frame is fixedly installed on the left side of the mobile platform, a transmission chain is arranged on the right side of the vertical frame, an execution motor is arranged on the left side of the vertical frame for sliding up and down, the execution motor is fixedly connected to the transmission chain, a trimming mechanism for trimming the foundation pit hole wall is arranged at the lower part of the execution motor, and a positioning mechanism for auxiliary positioning of the rotary jet pile position is arranged on the left side of the vertical frame.

[0008] The finishing mechanism includes a transmission rod connected to the lower end of the output shaft of the execution motor in a detachable manner, the diameter of the middle part of the transmission rod is smaller than the diameter of the two ends thereof, a movable plate is detachably provided on the left side of the vertical frame for sliding up and down, a tubular frame is fixedly installed at the lower part of the movable plate, the transmission rod is rotatably connected to the inside of the tubular frame, an extension component is provided inside the tubular frame for additionally expanding the position of the foundation pit hole wall toward the side jet grouting piles, and a pressing component is provided at the lower part of the transmission rod for consolidating the foundation pit hole wall.

[0009] The positioning mechanism includes an articulated square rod that is symmetrically hinged front and back at the lower left part of the vertical frame. A rotating gear is fixedly installed at the connection between the articulated square rod and the vertical frame. The two rotating gears are meshed with each other. A moving frame is slidably arranged on the articulated square rod along its length direction. A clamping assembly for centering and clamping the rotary jet pile is arranged at the lower part of the moving frame. An auxiliary assembly for assisting the positioning of the moving vehicle is arranged on the articulated square rod on the rear side.

[0010] As a preferred technical solution of the present invention, the expansion component includes a position frame that is symmetrical front and back and rotatably arranged on a tubular frame, a feed plate is arranged inside the position frame for radial sliding along the tubular frame, an extension piece is symmetrically rotatably arranged on the side of the feed plate away from the axis position of the tubular frame, two extension pieces on the same feed plate are combined into a pointed structure on the side away from the axis position of the tubular frame, a driving part is arranged on the position frame for driving the extension piece to puncture and press the wall of the foundation pit hole, and a directional part is arranged on the tubular frame for driving the extension piece to move toward the direction of the lateral rotary jet pile.

[0011] As a preferred technical solution of the present invention, the driving part includes a connecting plate hinged on the upper side of the extension piece near the axis of the tubular frame, and sliding blocks that slide along the thickness direction are symmetrically arranged on the upper side of the feed plate. The sliding blocks are slidably connected to the connecting plate along the length direction of the feed plate. Straight grooves are symmetrically opened on the inner wall at the top of the position frame. The two straight grooves on the same position frame are gradually approached from the inside to the outside. The upper side of the connecting plate slides inside the straight groove at the corresponding position through a raised column, and a No. 1 flower-shaped groove is opened on the transmission rod, and the feed plate slides inside the No. 1 flower-shaped groove through the guide column thereon.

[0012] As a preferred technical solution of the present invention, the orienting part includes an L-shaped plate fixedly connected to the position frame, an extension plate is slidably arranged on the horizontal section of the L-shaped plate, a fixing rod is fixedly installed at the upper center position of the movable frame, and the fixing rod is slidably connected to the extension plate up and down.

[0013] As a preferred technical solution of the present invention, the pressing assembly includes a vortex plate arranged at equal intervals along the circumference of the transmission rod on the outer side of its lower part, the vortex plate is hinged to the transmission rod, a trajectory groove is opened on the upper side of the vortex plate along its trajectory, a No. 2 flower-shaped groove is opened on the lower side of the tubular frame, and sliding rod members corresponding to the vortex plate are arranged at equal intervals along the circumference of the lower part of the transmission rod, the sliding rod members are slidably connected to the transmission rod along the radial direction, the upper part of the sliding rod member slides inside the No. 2 flower-shaped groove, and the lower part of the sliding rod member slides inside the trajectory groove at the corresponding position.

[0014] As a preferred technical solution of the present invention, the clamping assembly includes a rotating frame rotatably arranged at the lower part of the moving frame, a rotating disk rotatably arranged at the lower part of the moving frame, the rotating disk is located on the upper side of the rotating frame, vortex grooves are opened on the rotating disk at equal intervals along its circumference, and a clamping plate is arranged at equal intervals along the circumference of the rotating disk at the lower part of the rotating frame, the clamping plate is slidably connected to the rotating frame along the radial direction of the rotating disk, the upper part of the clamping plate slides inside the vortex groove at the corresponding position through a follow-up column, and a hydraulic rod is hinged between the rotating disk and the rotating frame at the same location.

[0015] As a preferred technical solution of the present invention, the auxiliary component includes a blocking block slidably arranged inside the rear hinged square rod along its length direction, and a threaded rod is rotatably arranged inside the rear hinged square rod, and the threaded rod is threadedly connected to the blocking block.

[0016] As a preferred technical solution of the present invention, the present invention also provides a cement-soil mixing pile combined high-pressure rotary jet pile enclosure method, and the enclosure method steps are as follows:

[0017] S1. Use the skip pile method to drill holes in the foundation pit between the cement-soil mixing pile and the underground continuous wall, and then use high-pressure rotary jet equipment to jet-jet the holes in the foundation pit into piles.

[0018] S2. Install the drill rod at the lower end of the output shaft of the actuator motor, and then quickly position the drill rod to the position between two adjacent jet grouting piles through the clamping assembly and the auxiliary assembly, and then drill holes in the foundation pit through the drill rod.

[0019] S3. Remove the drill rod and install the trimming mechanism on the vertical frame. Then, the inner wall of the foundation pit hole is pressed and consolidated by the trimming mechanism. At the same time, the trimming mechanism expands the position of the foundation pit hole close to the side jet grouting piles.

[0020] S4. Move the finishing mechanism out of the foundation pit hole, and use high-pressure rotary jet equipment to jet-jet the foundation pit hole into piles, so that the jet-jet piles overlap each other, and the jet-jet piles connect the cement-soil mixing piles with the underground continuous wall.

[0021] The beneficial effects of the present invention are:

[0022] 1. The present invention adopts a pressing component to press the wall of the foundation pit hole drilled by the drilling rig, so that the soil on the wall of the foundation pit hole is relatively compact, preventing the soil on the inner wall of the foundation pit hole from falling when the grouting pipe is extended into the hole, thereby avoiding the blockage of the nozzle of the grouting pipe by the soil, ensuring the same grouting amount of each nozzle, and ensuring the construction quality of the high-pressure rotary jet pile.

[0023] 2. The present invention adopts an expansion component to destroy the soil close to the lateral high-pressure rotary jet piles, so that the slurry sprayed from the grouting pipe can easily flow to the lateral high-pressure rotary jet piles, thereby ensuring the performance of the overlapping parts of the two overlapping high-pressure rotary jet piles, thereby ensuring the overall protection quality of the foundation pit, and the expansion component can also press and consolidate the soil to both sides while destroying the soil, preventing the damaged and loosened soil from clogging the nozzle of the grouting pipe, thereby further ensuring the construction quality of the high-pressure rotary jet piles.

[0024] 3. The present invention adopts a clamping component to perform centering clamping on the high-pressure rotary jet piles that have been constructed on both sides, so that the transmission rod can be accurately located between the high-pressure rotary jet piles on both sides. After that, the transmission rod can be quickly positioned to the position where construction is required through the auxiliary component, ensuring that the overlapping area between the unconstructed high-pressure rotary jet pile and the two constructed high-pressure rotary jet piles is the same, and the overlapping area between the unconstructed high-pressure rotary jet pile and the two constructed high-pressure rotary jet piles can also be quickly adjusted through the auxiliary component, thereby making the construction positioning operation more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0027] Figure 2 It is a partial cross-sectional view of the vertical frame and the positioning mechanism in the present invention.

[0028] Figure 3 It is a cross-sectional view of the transmission rod, the movable plate and the tubular frame in the present invention.

[0029] Figure 4 It is a cross-sectional view of the transmission rod, the moving plate, the tubular frame, the pressing component and the No. 1 flower-shaped groove in the present invention.

[0030] Figure 5It is a structural schematic diagram of the vortex plate and the sliding rod member in the present invention.

[0031] Figure 6 It is a partial cross-sectional view of the transmission rod, tubular frame and expansion assembly in the present invention.

[0032] Figure 7 It is a partial cross-sectional view of the transmission rod, feed plate, extension piece and driving part in the present invention.

[0033] Figure 8 It is a top view of the feed plate and the extension member in the present invention.

[0034] Fig. 9 It is a partial cross-sectional view of the position frame, the connecting plate and the linear groove in the present invention.

[0035] In the figure: 1, mobile car; 2, lifting mechanism; 3, mobile platform; 4, vertical frame; 5, transmission chain; 6, execution motor; 7, trimming mechanism; 8, positioning mechanism; 71, transmission rod; 72, mobile plate; 73, tubular frame; 74, extension assembly; 75, pressing assembly; 81, hinged square rod; 82, rotating gear; 83, mobile frame; 84, clamping assembly; 85, auxiliary assembly; 741, position frame; 742, feed plate; 743, extension piece; 744, driving part; 745, orienting part; 751, vortex plate; 752, No. 2 flower-shaped groove; 753, sliding rod; 841, rotating frame; 842, rotating disk; 843, clamping plate; 844, hydraulic rod; 851, blocking block; 852, threaded rod; 7441, connecting plate; 7442, sliding block; 7443, linear groove; 7444, No. 1 flower-shaped groove; 7451, L-shaped plate; 7452, extension plate; 7453, fixing rod. DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in detail below. The embodiments described below are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. If no specific techniques or conditions are specified in the embodiments, the techniques or conditions described in the literature in the art or the product specifications are used.

[0037] See also Figure 1 and Figure 2 A cement-soil mixing pile combined high-pressure rotary jet pile retaining structure comprises a mobile vehicle 1, a lifting mechanism 2 is arranged on the upper part of the mobile vehicle 1, a mobile platform 3 is arranged on the upper part of the lifting mechanism 2, a vertical frame 4 is fixedly installed on the left side of the mobile platform 3, a transmission chain 5 is arranged on the right side of the vertical frame 4, an execution motor 6 is arranged on the left side of the vertical frame 4 for sliding up and down, the execution motor 6 is fixedly connected to the transmission chain 5, a trimming mechanism 7 for trimming the foundation pit hole wall is arranged at the lower part of the execution motor 6, and a positioning mechanism 8 for auxiliary positioning of the rotary jet pile position is arranged on the left side of the vertical frame 4.

[0038] When it is necessary to construct a high-pressure rotary jet pile that overlaps two completed high-pressure rotary jet piles, firstly locate the position of the mobile vehicle 1 through the positioning mechanism 8, so that the mobile vehicle 1 drives the finishing mechanism 7 to move to the construction position through the lifting mechanism 2, the moving platform 3, and the vertical frame 4 in sequence, and then the drill bit is installed at the lower end of the output shaft of the execution motor 6, and the execution motor 6 is driven to move downward by the transmission chain 5. At the same time, the execution motor 6 drives the drill bit to rotate, so that the drill bit drills a hole at the construction position of the foundation pit. After the drilling is completed, the drill bit is replaced by the finishing mechanism 7, and then the execution motor 6 is moved downward again, so that the finishing mechanism 7 consolidates and expands the foundation pit hole wall, and the grouting pipe is installed on the execution motor 6, so that the grouting pipe extends into the foundation pit hole for spraying construction.

[0039] It should be noted that the lifting mechanism 2 in this embodiment adopts the existing scissor-type lifting structure.

[0040] Continue reading Figure 1 and Figure 2 The positioning mechanism 8 includes an articulated square rod 81 which is symmetrically hinged front and back at the lower left part of the vertical frame 4. A rotating gear 82 is fixedly installed at the connection between the articulated square rod 81 and the vertical frame 4. The two rotating gears 82 are meshed with each other. A moving frame 83 is slidably provided on the articulated square rod 81 along its length direction. A clamping assembly 84 for centering and clamping the rotary jet pile is provided at the lower part of the moving frame 83.

[0041] See also Figure 2 The clamping assembly 84 includes a rotating frame 841 rotatably arranged at the lower part of the moving frame 83, a rotating disk 842 is rotatably arranged at the lower part of the moving frame 83, the rotating disk 842 is located on the upper side of the rotating frame 841, and vortex grooves are opened on the rotating disk 842 at equal intervals along its circumference, and a clamping plate 843 is arranged at equal intervals along the circumference of the rotating disk 842 at the lower part of the rotating frame 841. The clamping plate 843 is slidably connected to the rotating frame 841 along the radial direction of the rotating disk 842, and the upper part of the clamping plate 843 slides inside the vortex groove at the corresponding position through a follower column, and a hydraulic rod 844 is hinged between the rotating disk 842 and the rotating frame 841 at the same place.

[0042] When it is necessary to fix the position of the mobile vehicle 1, the mobile vehicle 1 is driven to between two completed high-pressure rotary jet piles, and then the operator rotates the articulated square rod 81 and slides the moving frame 83 in its length direction, so that the moving frame 83 drives the rotating disk 842 to move to just above the completed high-pressure rotary jet pile, and then moves the moving platform 3 downward through the lifting mechanism 2, and the moving platform 3 drives the articulated square rod 81 downward through the vertical frame 4, and the articulated square rod 81 drives the rotating frame 841 downward through the moving frame 83, so that the rotating frame 841 drives the clamping plate 843 to move to the outside of the completed high-pressure rotary jet pile.

[0043] It should be noted that when the operator rotates an articulated square rod 81, the articulated square rod 81 drives the rotating gear 82 thereon to rotate synchronously, and the rotating gear 82 drives another rotating gear 82 to move synchronously in the opposite direction, so that the other rotating gear 82 drives another articulated square rod 81 to move synchronously, and then the two articulated square rods 81 move synchronously in the opposite direction relative to the moving vehicle 1.

[0044] When the clamping plate 843 moves to the outside of the high-pressure rotary jet pile, the telescopic section of the hydraulic rod 844 is contracted, so that the hydraulic rod 844 drives the rotating disk 842 and the rotating frame 841 to rotate in opposite directions, so that the rotating disk 842 pushes the clamping plate 843 along its radial direction through the vortex groove thereon, and then the clamping plate 843 on the same rotating frame 841 is synchronously moved and clamped on the high-pressure rotary jet pile, and the reaction force of the high-pressure rotary jet pile on the clamping plate 843 drives the rotating disk 842 to be located at the coaxial position of the high-pressure rotary jet pile, and at this time, the mobile vehicle 1 is limited to the center position between two high-pressure rotary jet piles that have been completed.

[0045] Continue reading Figure 2 The positioning mechanism 8 also includes an auxiliary component 85 arranged on the rear hinged square rod 81, and the auxiliary component 85 includes a blocking block 851 slidably arranged inside the rear hinged square rod 81 along the length direction of the rear hinged square rod 81. A threaded rod 852 is rotatably arranged inside the rear hinged square rod 81, and the threaded rod 852 is threadedly connected to the blocking block 851.

[0046] When the clamping plate 843 is clamped on the high-pressure rotary jet pile, the operator rotates the threaded rod 852 according to the required overlapping area between the high-pressure rotary jet piles, so that the threaded rod 852 drives the blocking block 851 to adjust the position along the length direction of the rear articulated square rod 81, and then drives the moving vehicle 1 to the left, so that the moving vehicle 1 drives the articulated square rod 81 to move to the left through the vertical frame 4, so that the rear articulated square rod 81 drives the blocking block 851 to move synchronously, and when the blocking block 851 abuts against the moving frame 83 on the rear side, stop driving the moving vehicle 1, so that the moving vehicle 1 drives the execution motor 6 to move to the construction position.

[0047] See also Figure 1 , Figure 3 and Figure 4 The trimming mechanism 7 includes a transmission rod 71 detachably connected to the lower end of the output shaft of the execution motor 6. The diameter of the middle part of the transmission rod 71 is smaller than the diameter of its two ends. A movable plate 72 is detachably provided on the left side of the vertical frame 4 so as to slide up and down. A tubular frame 73 is fixedly installed at the lower part of the movable plate 72. The transmission rod 71 is rotatably connected to the inside of the tubular frame 73.

[0048] When the mobile vehicle 1 drives the execution motor 6 to move to the construction position, the drill bit is installed at the lower part of the output shaft of the execution motor 6, and then the execution motor 6 is started to drive the drill bit to rotate, and the execution motor 6 is driven to move downward by rotating the transmission chain 5, so that the execution motor 6 drives the drill bit to drill holes at the construction position of the foundation pit. After the drilling is completed, the drill hole is lifted out of the foundation pit and removed from the execution motor 6, and then the transmission rod 71 is fixedly installed at the lower end of the output shaft of the execution motor 6, and the movable plate 72 is slidably connected to the left side of the vertical frame 4.

[0049] It should be noted that the transmission rod 71 in this embodiment is connected to the output shaft of the actuator motor 6 by a threaded connection. In this embodiment, a sliding plate is symmetrically arranged on the vertical frame 4 and slides in the vertical direction. The movable plate 72 is fixedly installed between the two sliding plates by bolt connection, so that the movable plate 72 can be slidably connected to the vertical frame 4 up and down through the sliding plate.

[0050] See also Figure 1 , Figure 3 , Figure 4 , Figure 6 , Figure 7 and Figure 8 The trimming mechanism 7 also includes an extension component 74 arranged inside the tubular frame 73, and the extension component 74 includes a position frame 741 that is symmetrical in front and back and rotatably arranged on the tubular frame 73. A feed plate 742 is arranged inside the position frame 741 to slide radially along the tubular frame 73, and an extension piece 743 is symmetrically rotatably arranged on one side of the feed plate 742 away from the axis position of the tubular frame 73. The two extension pieces 743 on the same feed plate 742 are combined into a pointed structure on the side away from the axis position of the tubular frame 73.

[0051] See also Figure 1 , Figure 2 and Figure 6 The extension component 74 also includes an orienting portion 745 arranged on the tubular frame 73, and the orienting portion 745 includes an L-shaped plate 7451 fixedly connected to the position frame 741, and an extension plate 7452 is slidably arranged on the horizontal section of the L-shaped plate 7451. A fixing rod 7453 is fixedly installed at the upper center position of the movable frame 83, and the fixing rod 7453 is slidably connected to the extension plate 7452 up and down.

[0052] When the movable plate 72 is connected to the vertical frame 4, the movable plate 72 drives the extension plate 7452 to be sleeved on the outside of the fixed rod 7453 in sequence through the tubular frame 73, the position frame 741, and the L-shaped plate 7451, so that the fixed rod 7453 and the extension plate 7452 are slidably connected up and down. When the fixed rod 7453 and the extension plate 7452 are connected together, the extension plate 7452 drives the position frame 741 to rotate toward the direction of the completed high-pressure rotary jet pile through the L-shaped plate 7451, and the position frame 741 drives the extension piece 743 thereon to synchronously face the direction of the completed high-pressure rotary jet pile through the feed plate 742, thereby facilitating the extension piece 743 to destroy the soil close to the direction of the completed high-pressure rotary jet pile on the side, so that the slurry sprayed from the grouting pipe can easily flow to the completed high-pressure rotary jet pile on the side.

[0053] See also Figure 3 , Figure 4 and Figure 5 The trimming mechanism 7 also includes a pressing assembly 75 arranged at the lower part of the transmission rod 71. The pressing assembly 75 includes a vortex plate 751 arranged at equal intervals along the circumference of the transmission rod 71 on the outer side of the lower part thereof. The vortex plate 751 is hinged to the transmission rod 71. A track groove is provided on the upper side of the vortex plate 751 along its track. A second flower-shaped groove 752 is provided on the lower side of the tubular frame 73. Slide rods 753 corresponding to the vortex plate 751 are provided at equal intervals along the circumference of the lower part of the transmission rod 71. The slide rod 753 is slidably connected to the transmission rod 71 along the radial direction. The upper part of the slide rod 753 slides inside the second flower-shaped groove 752, and the lower part of the slide rod 753 slides inside the track groove at the corresponding position.

[0054] When the fixing rod 7453 is connected to the extension plate 7452, the execution motor 6 is started to drive the transmission rod 71 to rotate, and the execution motor 6 is driven downward by rotating the transmission chain 5, so that the transmission rod 71 drives the movable plate 72 to move vertically downward through the tubular frame 73, so that the transmission rod 71 and the tubular frame 73 gradually extend into the interior of the foundation pit hole from top to bottom, and the transmission rod 71 drives the vortex plate 751 and the sliding rod 753 thereon to rotate synchronously, so that the sliding rod 753 moves along the trajectory of the No. 2 flower-shaped groove 752, and the No. 2 flower-shaped groove 752 reciprocates the sliding rod 753 along the radial direction of the transmission rod 71, so that the sliding rod 753 reciprocates along the trajectory groove on the vortex plate 751 to push and pull the vortex plate 751 reciprocatingly, so that the vortex plate 751 presses and consolidates the soil on the inner wall of the foundation pit hole through its own reciprocating expansion, thereby preventing the loose soil from clogging the nozzle of the grouting pipe.

[0055] See also Figure 6 , Figure 7 , Figure 8 and Fig. 9The extension component 74 also includes a driving part 744 arranged on the position frame 741, and the driving part 744 includes a connecting plate 7441 hinged on the upper side of the extension piece 743 near the axis position of the tubular frame 73, and a sliding block 7442 that slides along its thickness direction is symmetrically arranged on the upper side of the feed plate 742, and the sliding block 7442 is slidably connected to the connecting plate 7441 along the length direction of the feed plate 742, and linear grooves 7443 are symmetrically opened on the inner wall of the top of the position frame 741. The two linear grooves 7443 on the same position frame 741 are gradually approached from the inside to the outside. The upper side of the connecting plate 7441 slides in the linear groove 7443 at the corresponding position through the raised column, and a No. 1 flower-shaped groove 7444 is opened on the transmission rod 71, and the feed plate 742 slides in the No. 1 flower-shaped groove 7444 through the guide column thereon.

[0056] When the transmission rod 71 rotates, the transmission rod 71 pushes the feed plate 742 reciprocatingly along its radial direction through the No. 1 flower-shaped groove 7444 thereon. When the No. 1 flower-shaped groove 7444 pushes the feed plate 742 outward, the feed plate 742 drives the extension piece 743 combined thereon to puncture and destroy the position of the foundation pit hole close to the side rotary jet pile, so that the slurry sprayed out from the subsequent grouting pipe can easily flow to the high-pressure rotary jet pile on the side that has been completed. At the same time, the extension piece 743 drives the connecting plate 7441 to move synchronously, so that the connecting plate 7441 moves along the trajectory of the straight groove 7443, so that the straight groove 7443 pushes the two connecting plates 7441 on the same feed plate 742 to approach each other, and the connecting plate 7441 drives the extension piece 743 at the corresponding position to rotate, so that the extension piece 743 presses the destroyed soil tightly to avoid clogging the nozzle of the grouting pipe.

[0057] After the soil on the inner wall of the foundation pit hole is consolidated, the transmission rod 71 and the tubular frame 73 are moved out of the foundation pit hole, and then the transmission rod 71 is removed from the output shaft of the execution motor 6, and the movable plate 72 is removed from the vertical frame 4. The grouting pipe is then installed on the output shaft of the execution motor 6, and the grouting pipe is extended into the foundation pit hole through the transmission chain 5. The grouting pipe is driven to rotate by the execution motor 6, and the slurry is sprayed into the foundation pit hole, thereby completing the construction of the high-pressure rotary jet piles between the two completed high-pressure rotary jet piles.

[0058] In addition, the present invention also provides a cement-soil mixing pile combined high-pressure rotary jet pile enclosure method, and the specific enclosure method steps are as follows:

[0059] S1. Use the skip pile method to drill holes in the foundation pit between the cement-soil mixing pile and the underground continuous wall, and then use high-pressure rotary jet equipment to jet-jet the holes in the foundation pit into piles.

[0060] S2. Install the drill rod at the lower end of the output shaft of the execution motor 6, and then clamp it with the two completed high-pressure jet grouting piles through the clamping plate 843. Then start the mobile vehicle 1 so that the blocking block 851 abuts against the movable frame 83 on the rear side, so that the output shaft of the execution motor 6 moves to the construction position, and start the execution motor 6 to drive the drill rod to drill holes in the foundation pit.

[0061] S3. Remove the drill rod, and then connect the transmission rod 71 and the tubular frame 73 to the execution motor 6 and the vertical frame 4 respectively. Then the execution motor 6 drives the transmission rod 71 to rotate and move downward, so that the vortex plate 751 presses and consolidates the inner wall of the foundation pit hole. At the same time, the two extension pieces 743 on the same feed plate 742 expand the position of the foundation pit hole close to the side jet grouting piles.

[0062] S4. Move the transmission rod 71 and the tubular frame 73 out of the foundation pit hole and remove them. Then install the grouting pipe on the output shaft of the execution motor 6. Extend the grouting pipe into the foundation pit hole through the transmission chain 5. Drive the grouting pipe to rotate through the execution motor 6, and spray the slurry into the foundation pit hole, so that the rotary jet pile connects the cement soil mixing pile with the underground continuous wall.

[0063] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention and they are still covered by the protection scope of the present invention.

Claims

1. A cement-soil mixing pile combined with a high-pressure jet grouting pile enclosure structure, comprising a mobile vehicle (1), a lifting mechanism (2) is arranged on the upper part of the mobile vehicle (1), a mobile platform (3) is arranged on the upper part of the lifting mechanism (2), a vertical frame (4) is fixedly installed on the left side of the mobile platform (3), and a conveying chain (5) is arranged on the right side of the vertical frame (4), characterized in that: An execution motor (6) is provided on the left side of the vertical frame (4) for sliding up and down, the execution motor (6) is fixedly connected to the transmission chain (5), a trimming mechanism (7) for trimming the foundation pit hole wall is provided at the lower part of the execution motor (6), and a positioning mechanism (8) for assisting in positioning the jet grouting pile position is provided on the left side of the vertical frame (4); The finishing mechanism (7) comprises a transmission rod (71) connected to the lower end of the output shaft of the execution motor (6) in a detachable manner, the diameter of the middle part of the transmission rod (71) is smaller than the diameter of the two ends thereof, a movable plate (72) is detachably provided on the left side of the vertical frame (4) so ​​as to slide up and down, a tubular frame (73) is fixedly installed at the lower part of the movable plate (72), the transmission rod (71) is rotatably connected to the inside of the tubular frame (73), an expansion component (74) for additionally expanding the position of the foundation pit hole wall toward the side jet grouting pile is provided inside the tubular frame (73), and a pressing component (75) for consolidating the foundation pit hole wall is provided at the lower part of the transmission rod (71); The positioning mechanism (8) comprises an articulated square rod (81) symmetrically articulated at the lower left side of the vertical frame (4), a rotating gear (82) is fixedly installed at the connection between the articulated square rod (81) and the vertical frame (4), the two rotating gears (82) are meshed with each other, a moving frame (83) is slidably arranged on the articulated square rod (81) along its length direction, a clamping assembly (84) for centering and clamping the jet grouting pile is arranged at the lower part of the moving frame (83), and an auxiliary assembly (85) for assisting in positioning the position of the moving vehicle (1) is arranged on the rear articulated square rod (81).

2. The cement-soil mixing pile combined with high-pressure jet grouting pile enclosure structure according to claim 1 is characterized in that: The expansion component (74) comprises a position frame (741) which is symmetrical in front and back and is rotatably arranged on the tubular frame (73); a feed plate (742) is arranged inside the position frame (741) to slide radially along the tubular frame (73); an expansion piece (743) is symmetrically rotatably arranged on the side of the feed plate (742) away from the axial position of the tubular frame (73); two expansion pieces (743) on the same feed plate (742) are combined into a pointed structure on the side away from the axial position of the tubular frame (73); a driving part (744) is arranged on the position frame (741) to drive the expansion piece (743) to puncture and press the foundation pit hole wall; and a directional part (745) is arranged on the tubular frame (73) to drive the expansion piece (743) toward the direction of the side jet-jet pile.

3. The cement-soil mixing pile combined with high-pressure jet grouting pile enclosure structure according to claim 2 is characterized in that: The driving part (744) comprises a connecting plate (7441) hinged on the upper side of the extension piece (743) near the axis position of the tubular frame (73); a sliding block (7442) sliding along the thickness direction is symmetrically arranged on the upper side of the feed plate (742); the sliding block (7442) is slidably connected to the connecting plate (7441) along the length direction of the feed plate (742); linear grooves (7443) are symmetrically opened on the inner wall of the top of the position frame (741); the two linear grooves (7443) on the same position frame (741) are gradually approached from the inside to the outside; the upper side of the connecting plate (7441) slides inside the linear groove (7443) at the corresponding position through a protruding column; a No. 1 flower-shaped groove (7444) is opened on the transmission rod (71); the feed plate (742) slides inside the No. 1 flower-shaped groove (7444) through the guide column thereon.

4. The cement-soil mixing pile combined with high-pressure jet grouting pile enclosure structure according to claim 2 is characterized in that: The orientation portion (745) comprises an L-shaped plate (7451) fixedly connected to the position frame (741), an extension plate (7452) being slidably arranged on the horizontal section of the L-shaped plate (7451), a fixed rod (7453) being fixedly installed at the upper center position of the movable frame (83), and the fixed rod (7453) being slidably connected to the extension plate (7452) up and down.

5. The cement-soil mixing pile combined with high-pressure jet grouting pile enclosure structure according to claim 1 is characterized in that: The pressing assembly (75) comprises a vortex plate (751) arranged at equal intervals along the circumference of the transmission rod (71) on the outer side of the lower part thereof, the vortex plate (751) is hinged to the transmission rod (71), a track groove is provided on the upper side of the vortex plate (751) along its track, a second flower-shaped groove (752) is provided on the lower side of the tubular frame (73), and sliding rods (753) corresponding to the vortex plate (751) are arranged at equal intervals along the circumference of the lower part of the transmission rod (71), the sliding rods (753) are slidably connected to the transmission rod (71) along the radial direction thereof, the upper part of the sliding rod (753) slides inside the second flower-shaped groove (752), and the lower part of the sliding rod (753) slides inside the track groove at the corresponding position.

6. The cement-soil mixing pile combined with high-pressure jet grouting pile enclosure structure according to claim 1 is characterized in that: The clamping assembly (84) comprises a rotating frame (841) rotatably arranged at the lower part of the moving frame (83); a rotating disk (842) is rotatably arranged at the lower part of the moving frame (83); the rotating disk (842) is located at the upper side of the rotating frame (841); vortex grooves are provided on the rotating disk (842) at equal intervals along its circumference; a clamping plate (843) is provided at equal intervals along the circumference of the rotating disk (842) at the lower part of the rotating frame (841); the clamping plate (843) is slidably connected to the rotating frame (841) along the radial direction of the rotating disk (842); the upper part of the clamping plate (843) slides inside the vortex groove at the corresponding position through a follower column; a hydraulic rod (844) is hinged between the rotating disk (842) and the rotating frame (841) at the same location.

7. The cement-soil mixing pile combined with high-pressure jet grouting pile enclosure structure according to claim 1 is characterized in that: The auxiliary component (85) comprises a blocking block (851) slidably arranged inside the rear hinged square rod (81) along its length direction, and a threaded rod (852) is rotatably arranged inside the rear hinged square rod (81), and the threaded rod (852) is threadedly connected to the blocking block (851).

8. A cement-soil mixing pile combined with high-pressure rotary jet grouting pile enclosure method, using the cement-soil mixing pile combined with high-pressure rotary jet grouting pile enclosure structure according to any one of claims 1 to 7, characterized in that: The steps of the enclosure method are as follows: S1. Drill holes on the foundation pit between the cement-soil mixing pile and the underground continuous wall using the skip pile method, and then use high-pressure jet grouting equipment to jet grout the holes on the foundation pit to form piles; S2, installing a drill rod at the lower end of the output shaft of the actuator motor (6), then quickly positioning the drill rod to a position between two adjacent jet grouting piles through a clamping assembly (84) and an auxiliary assembly (85), and then drilling a hole in the foundation pit through the drill rod; S3, the drill rod is removed, and the trimming mechanism (7) is installed on the vertical frame (4), and then the inner wall of the foundation pit hole is pressed and consolidated by the trimming mechanism (7), and at the same time, the trimming mechanism (7) expands the position of the foundation pit hole close to the side jet grouting pile; S4, moving the finishing mechanism (7) out of the foundation pit hole, and using high-pressure jet grouting equipment to jet grout the foundation pit hole into piles, so that the jet grouting piles overlap each other, and the jet grouting piles connect the cement soil mixing piles with the underground continuous wall.

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