Stirring pile machine suitable for muddy silty clay roadbed in coastal saturated water section
By designing a mixing pile machine suitable for silty clay subgrade in the saturated section of the coastal area, and utilizing the combination of pile body, grouting device and mixing device, the problem of insufficient bonding force between the pile body and the soil was solved, thereby improving the stability of the subgrade and the construction efficiency.
Patent Information
- Application Number
- CN202511791921.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-01
- Publication Date
- 2026-02-13
AI Technical Summary
In the construction of silty clay subgrade in the water-saturated section of the coastal area, the insufficient bonding force between the pile and the soil leads to poor subgrade stability and high construction difficulty. Furthermore, traditional mixing pile machines are unable to form a uniform and stable structure in this environment.
A mixing pile machine suitable for silty clay subgrade in water-saturated sections of coastal areas was designed. It adopts a pile body, grouting device and mixing device, and through technologies such as drilling structure, boss design, mixing components and plugs, it ensures effective bonding between the pile body and the soil, thereby improving construction efficiency and stability.
It effectively improved the bonding force between the pile and the soil, enhanced the stability of the roadbed, reduced the construction difficulty, improved the construction efficiency, and reduced the instability impact during drilling and grouting.
Smart Images
Figure CN121519495A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of building construction, and in particular to a mixing pile machine suitable for silty clay roadbeds in saturated coastal sections. Background Technology
[0002] In coastal areas, roadbed construction often faces unique geological conditions with saturated silty clay soils. This type of soil is characterized by high water content, low strength, high compressibility, and strong cohesion, posing a significant challenge to roadbed treatment.
[0003] While traditional cement-mixing piles perform well under normal geological conditions, they prove inadequate in this particular environment. For example, silty clay with high water content is prone to rheological phenomena during construction, making it difficult to form a uniform and stable pile structure. Simultaneously, the strong cohesiveness of the soil results in insufficient bonding between the pile and the soil, further affecting the overall stability of the roadbed. These problems not only increase construction difficulty but may also lead to potential safety hazards later in the project.
[0004] Therefore, there is an urgent need for a cement mixing pile machine specifically designed for constructing cement mixing piles for silty clay subgrades in coastal waterlogged sections, in order to improve the bonding force between the pile and the soil, enhance the stability of the subgrade, and increase construction efficiency. Summary of the Invention
[0005] This application provides a mixing pile machine suitable for silty clay roadbeds in saturated coastal sections, which can effectively improve the bonding force between the pile and the soil, enhance the stability of the roadbed, and improve construction efficiency.
[0006] This application provides a mixing pile machine suitable for silty clay roadbeds in saturated coastal sections, employing the following technical solution: A mixing pile machine suitable for silty clay roadbeds in saturated coastal sections includes a pile body, a grouting device, and a mixing device. The bottom of the pile has a drilled structure, and its top has several protrusions extending outward perpendicular to the drilling direction. The grouting device includes several grout delivery pipes; several grout outlet holes are opened on the pile body; the grout delivery pipes are located inside the pile body, with one end communicating with the grout outlet holes and the other end supplying grout through a pipeline. The mixing device includes several mixing components. The pile body has several clearance spaces for the installation of the mixing components near the drilling structure, and the bottom of the clearance space has an opening. The mixing assembly includes a movable seat, a first driving member, a rotating rod, a second driving member, and a spiral blade. The movable seat is disposed inside the pile body and is movably connected to the pile body along the drilling direction, and the first driving member is used to drive the movable seat to move. The rotating rod is rotatably connected to the movable seat, and its rotation axis is parallel to the drilling direction, and the second driving member is used to drive the rotating rod to rotate. The spiral blade is sleeved and fixed outside the rotating rod, and the axis of its spiral trajectory coincides with the rotation axis of the rotating rod. The movable seat movably drives the rotating rod to enter and exit the clearance space.
[0007] By adopting the above technical solution, the drilling structure can facilitate the formation of pile holes on the foundation by the mixing pile machine. Its boss design can improve the positional stability of the cement mixing piles formed in the foundation (reduce the probability of settlement), and at the same time, it can fully mix the injected slurry (cement), so that the cement and soil can be fully integrated, thereby effectively improving the bonding force between the pile and the soil, enhancing the stability of the roadbed and improving the construction efficiency.
[0008] Optionally, the drilling structure includes a first drilling section and a second drilling section; The first drilled portion is located at the bottom of the pile body, and the second drilled portion is located at the bottom of the first drilled portion; the surface of the second drilled portion has drilled patterns, the radial dimension of the bottom of the first drilled portion is smaller than the radial dimension of the top of the second drilled portion, and the clearance space forms an opening on the first drilled portion.
[0009] By adopting the above technical solutions, the efficiency of the mixing pile machine in completing pile hole construction through the drilling structure can be improved, while the probability of soil entering the clearance space during the drilling process and causing impact can be reduced.
[0010] Optionally, the slurry outlet is formed at a position in the first drilled portion near the second drilled portion.
[0011] By adopting the above technical solutions, the probability of soil clogging the grout outlet during drilling can be reduced, thereby improving the reliability and stability of subsequent grouting and molding of cement mixing piles. At the same time, it can effectively reduce the probability of grout entering the clearance space during the grouting process and causing impact.
[0012] Optionally, the stirring assembly further includes a blocking block for sealing the opening of the clearance space. The blocking block is located at the end of the rotating rod away from the movable seat, and the blocking block seals the opening of the clearance space when the movable seat moves upward to its limit position.
[0013] By adopting the above technical solution, the plugging block can effectively prevent soil from entering the clearance space during drilling, thereby improving the stability and reliability of the subsequent mixing components.
[0014] Optionally, the blocking block is rotatably connected to the rotating rod; when the blocking block blocks the opening of the clearance space, its bottom surface is flush with the surface of the first drilled hole after rotation.
[0015] By adopting the above technical solution, construction personnel can easily rotate the plug to a suitable position before drilling, thereby reducing the probability of the plug having an impact during the drilling process and ensuring the second drilling section maintains a stable auxiliary drilling effect.
[0016] Optionally, the stirring assembly further includes a guide; The guide is disposed on the inner wall of the clearance space near its opening, and is located inside the first drilled part; the block is provided with a guide groove for the guide to be inserted near the rotating rod, and the side of the guide groove away from the rotating rod has a guide surface that contacts the guide; As the movable seat moves upward to its limit position, the guide member contacts the guide surface and guides the block to rotate relative to the rotating rod, so that the surface of the top of the block is finally flush with the surface of the first drilled hole.
[0017] By adopting the above technical solution, during the upward movement of the movable seat to its limit position, the guide component and the guide surface will cooperate to place the block in a suitable position, thereby facilitating the subsequent drilling structure to complete the drilling. At the same time, no manual operation by construction personnel is required, further improving construction efficiency.
[0018] Optionally, the guide is rotatably connected to the first drilled portion, and its rotation axis is perpendicular to the movement direction of the movable seat.
[0019] By adopting the above technical solution, the probability of the guide block getting stuck during the rotation of the guide rod after the guide component contacts the guide surface can be effectively reduced, thereby effectively improving the reliability and stability of the guide component in guiding the position of the block.
[0020] Optionally, the end of the rotating rod near the movable seat has a blocking part for blocking the opening of the clearance space. When the movable seat moves downward to its limit position, the blocking part blocks the opening of the clearance space and contacts the guide. At this time, the rotating rod rotates to drive the guide to rotate.
[0021] By adopting the above technical solution, during the grouting process, the sealing part can effectively prevent cement and soil from entering the clearance space, thereby further reducing the probability of cement and soil entering the clearance space and causing impact.
[0022] Optionally, the stirring assembly further includes an elastic element; The guide is movably connected to the first drilled portion, and its direction of movement is inclined relative to the direction of movement of the movable seat; the two ends of the elastic member are respectively connected to the guide and the first drilled portion, and it has a tendency to drive the guide to move downward to the limit position.
[0023] By adopting the above technical solution, the probability of the guide block getting stuck during the rotation of the rotating rod after the guide member contacts the guide surface can be further reduced. At the same time, the efficiency and effectiveness of the guide member and guide surface in guiding the block to rotate to the appropriate position can be further improved.
[0024] Optionally, the block has a slot on the guide surface that is adapted to the guide member, and when the guide member is inserted into the slot, the bottom surface of the block is flush with the surface of the first drilled hole.
[0025] By adopting the above technical solution, the positional stability of the plug block after it rotates to the appropriate position can be improved, thereby reducing the probability that the rotation of the plug block during the drilling process will affect the drilling effect and efficiency of the drilling structure. At the same time, it can effectively reduce the probability that cement and soil will enter the clearance space through the gap between the plug block and the first drill head.
[0026] In summary, this application includes at least one of the following beneficial effects: 1. It can effectively improve the bonding force between the pile and the soil, enhance the stability of the roadbed, and improve construction efficiency; 2. It can effectively reduce the probability of cement and soil entering the clearance space and causing impact, thereby effectively improving the reliability and stability of the mixing components. 3. No manual intervention is required. During the movement of the movable seat, the opening and closing of the clearance space opening can be controlled by the blocking block, which can effectively reduce the impact of the blocking block on the drilling efficiency and effect of the drilling structure. Attached Figure Description
[0027] Figure 1 This is a partial structural diagram of the mixing pile machine used for drilling in Example 1; Figure 2 This is a schematic diagram of the internal structure of the bottom of the pile body when it is used for drilling in Example 1; Figure 3 This is a partial structural diagram of the mixing pile machine used for grouting in Example 1; Figure 4 This is a schematic diagram of the internal structure of the bottom of the pile body when it is used for grouting in Example 1; Figure 5 This is a partial structural diagram of the mixing pile machine used for grouting in Example 2; Figure 6 This is a schematic diagram of the internal structure of the bottom of the pile body when it is used for drilling in Example 2; Figure 7 This is a partial structural diagram of the bottom of the pile body when it is used for drilling in Example 2; Figure 8 This is a partial structural diagram of the bottom of the pile body when it is used for grouting in Example 2.
[0028] Explanation of reference numerals in the attached drawings: 1. Pile body; 11. Drilling structure; 111. First drilling section; 112. Second drilling section; 12. Boss; 13. Grout inlet hole; 14. Clearance space; 2. Grouting device; 21. Grout delivery pipe; 3. Mixing device; 31. Mixing assembly; 311. Movable seat; 312. First driving component; 313. Rotating rod; 3131. Sealing part; 314. Second driving component; 315. Helical blade; 316. Block; 3161. Guide groove; 3162. Guide surface; 3163. Slot; 317. Guide component; 318. Elastic component. Detailed Implementation
[0029] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.
[0030] Example 1: This application discloses a cement mixing pile machine suitable for silty clay roadbeds in saturated coastal sections. It is used to efficiently construct and form cement mixing piles with higher bonding strength and stronger stability on silty clay roadbeds in saturated coastal sections.
[0031] Reference Figure 1 and Figure 2 The mixing pile machine includes a pile body 1 for drilling to form a pile hole, a grouting device 2 for injecting cement, and a mixing device 3 for mixing and fusing cement and soil.
[0032] Reference Figure 1 and Figure 3The pile body 1 is a columnar structure with a square cross-section. It is used for drilling in a vertical position along its length. Its bottom has a drilling structure 11 for enabling the pile body 1 to drill, and its top has several protrusions 12 extending outward perpendicular to its own length direction to improve the bonding force between the cement mixing pile and the soil after subsequent construction. In this embodiment, the top of the preferred pile body 1 has four protrusions 12, which are arranged in a circular array around the vertical center line of the pile body 1, and the extension direction of the protrusions 12 is parallel to the side length of the cross-section of the pile body 1. The protrusions 12 are preferably rectangular in shape, and the side of the protrusions 12 near the drilling structure 11 has an inclined surface that slopes downward toward the pile body 1. The shape of the pile body 1 and the protrusions 12 facilitates the insertion of the pile body 1 into the soil for drilling, and can also effectively improve the positional stability of the cement mixing pile formed by subsequent construction in the foundation. Since the pile hole formed by constructing the cement mixing pile on the foundation through the pile body 1 is the prior art in this field, it will not be described in detail here, and other structures of the mixing pile machine are omitted in the accompanying drawings.
[0033] Reference Figure 1 and Figure 2 The drilling structure 11 includes a first drilling section 111 and a second drilling section 112. The first drilling section 111 is located at the bottom of the pile body 1, and the second drilling section 112 is located at the bottom of the first drilling section 111. When drilling is performed on the pile body 1, the second drilling section 112 performs the main drilling work, while the first drilling section 111 is used to complete auxiliary drilling work. The first drilling section 111 has a converging frustum structure, and the second drilling section 112 has a converging cone structure. The axes of the first drilling section 111, the second drilling section 112, and the vertical centerline of the pile body 1 coincide. In this embodiment, the conical surface of the second drilling section 112 preferably has drilling patterns to improve its drilling effect, and the drilling patterns are spiral along its axis. Since drilling patterns with the above-mentioned functions are common prior art, they will not be described in detail here, and their representation is omitted in the accompanying drawings.
[0034] The grouting device 2 includes a grouting pipe 21 for conveying grout (i.e., cement). The grouting pipe 21 is fixedly installed inside the pile body 1 and extends along the length of the pile body 1 at its center. A grout outlet hole for discharging grout is formed at the bottom of the pile body 1 near the second borehole 112 at a position perpendicular to the length of the pile body 1. The bottom of the grouting pipe 21 communicates with the grout outlet hole, allowing the grout to be discharged through the outlet hole from its two openings. A pipe with one end penetrating inside the pile body 1 is connected to a power device for conveying grout. After the grout enters the grouting pipe 21, it is discharged through the grout outlet hole. In this embodiment, it is preferable that the grouting pipe 21 extends along the length of the pile body 1 inside the pile body 1, and preferably the direction of the grout outlet hole is parallel to the side length of the pile body 1. Since the grouting pipe 21 with the above functions is common prior art, it will not be described in detail here, and is only briefly shown in the accompanying drawings.
[0035] Furthermore, in order to reduce the probability that soil entering the grout outlet during the drilling of the pile body 1 will cause blockage and affect the normal operation of the subsequent grouting device 2, it is preferable that the radial dimension of the top of the second drilling section 112 is larger than the radial dimension of the bottom of the first drilling section 111, so that the loose soil formed by drilling can move upward along the conical surface of the second drilling section 112 during the downward drilling of the pile body 1, so that the soil has the tendency to move upward to avoid the opening of the grout outlet.
[0036] Reference Figure 2 and Figure 4 The mixing device 3 includes several mixing components 31. The bottom of the pile body 1 has several clearance spaces 14 for installing the mixing components 31, and the bottom of the clearance spaces 14 has an opening formed on the conical surface of the first drilled portion 111. In this embodiment, the mixing device 3 preferably includes two mixing components 31, and the pile body 1 has two clearance spaces 14. The two mixing components 31 and the two clearance spaces 14 are symmetrically distributed along the same radial direction of the first drilled portion 111. Preferably, the distribution direction of the two mixing components 31 and the two clearance spaces 14 is parallel to the opening direction of the slurry outlet.
[0037] The stirring assembly 31 includes a movable seat 311, a first driving member 312, a rotating rod 313, a second driving member 314, a spiral blade 315, and a block 316.
[0038] The movable seat 311 is movably installed in the clearance space 14, and its direction of movement is parallel to the length direction of the pile body 1; the first driving member 312 is fixedly installed inside the pile body 1, located on the side of the movable seat 311 near the boss 12, and is used to drive the movable seat 311 to move relative to the pile body 1. In this embodiment, the first driving member 312 is preferably a servo cylinder; since servo cylinders are common prior art, they will not be described in detail here, and are only briefly shown in the accompanying drawings.
[0039] The rotating rod 313 is rotatably connected to the movable seat 311. It has a cylindrical structure, with its rotation axis coinciding with its own axis and parallel to the direction of movement of the movable seat 311. The second driving member 314 is fixedly mounted on the movable seat 311 and is used to drive the rotating rod 313 to rotate relative to the movable seat 311. In this embodiment, the second driving member 314 is preferably a servo motor; and preferably, the clearance space 14 is cylindrical in shape, with its axis coinciding with the axis of the rotating rod 313.
[0040] The spiral blade 315 is sleeved and fixed on the outside of the rotating rod 313. Its spiral trajectory is centered on the axis of the rotating rod 313, so that the spiral blade 315 can stir the cement and soil in contact with it during the rotation of the rotating rod 313. The blocking block 316 is cylindrical in shape and is fixedly installed at the bottom of the rotating rod 313. It is adapted to the opening at the bottom of the clearance space 14 and is used to block the opening at the bottom of the clearance space 14.
[0041] The first driving element 312 has limitations in the process of driving the movable seat 311 to move.
[0042] When the movable seat 311 moves upward to its limit position, the rotating rod 313 and the spiral blade 315 will be completely located in the clearance space 14, and the blocking block 316 is located at the opening of the clearance space 14 and blocks it; at this time, the pile body 1 is in the state of drilling, and the blocking block 316 can effectively prevent soil from entering the clearance space 14 and affecting the probability of the subsequent mixing component 31 operating normally.
[0043] When the movable seat 311 moves downward to its limit position, the rotating rod 313, the spiral blade 315 and the blocking block 316 will all be located outside the clearance space 14, and at this time the spiral blade 315 and the second drilling part 112 maintain a distance; at this time, the second driving member 314 drives the rotating rod 313 to rotate, so that the cement and soil in the pile hole can be mixed and fused by the spiral blade 315.
[0044] The implementation principle of a mixing pile machine suitable for silty clay roadbeds in saturated coastal sections according to an embodiment of this application is as follows: When the mixing component 31 is in the retracted state, the pile body 1 is first controlled to move downward and insert into the foundation. The required pile hole is obtained by drilling on the foundation through the drilling structure 11. Then, the pile body 1 is controlled to move upward and leave the pile hole. During this process, the grouting device 2 inputs the grout into the grout outlet through the grouting pipe 21, and then grouts into the pile hole through the grout outlet. At the same time, the mixing component 31 is in the use state. The rotating spiral blades 315 mix and fuse the cement and soil around the drilling structure 11 to improve the quality of the cement mixing pile after it is formed. After the cement mixing pile is constructed and formed, the shape design of the pile body 1 and the boss 12 improves the bonding force between its structure and the soil, thus improving the positional stability of the cement mixing pile in the foundation and effectively improving the structural stability of the foundation.
[0045] Example 2: Reference Figure 5 and Figure 6 The difference between this embodiment and Embodiment 1 is the stirring component 31.
[0046] Reference Figure 7 and Figure 8 Because the position of the blocking block 316 is closely related to the rotation position of the rotating rod 313 when the movable seat 311 moves upward to its limit position, it is difficult to make the bottom surface of the blocking block 316 flush with the conical surface of the first drilling part 111. When the blocking block 316 is located outside the opening of the clearance space 14 or forms a gap at the bottom of the opening of the clearance space 14, the drilling effect and efficiency of the first drilling part 111 will be affected. The soil generated by drilling is also likely to concentrate at the opening of the clearance space 14, and thus can easily enter the clearance space 14 through the gap between the blocking block 316 and the inner wall of the opening of the clearance space 14, affecting the normal operation of the subsequent mixing component 31. It is also easy to form a blockage near the opening of the clearance space 14, affecting the downward movement of the subsequent movable seat 311. Therefore, it is preferable that the block 316 is rotatably connected to the rotating rod 313, and its rotation axis coincides with its own axis and the axis of the rotating rod 313; and preferably the stirring assembly 31 also includes a guide 317 and an elastic member 318 for guiding the block 316 to seal the opening of the clearance space 14 while its bottom end face is flush with the conical surface of the first drilled hole 111.
[0047] The guide member 317 has a wheel-like structure and is movably connected to the first drilled portion 111 and located at the opening of the clearance space 14. The guide member 317 can rotate relative to the first drilled portion 111, with its rotation axis coinciding with its own axis and perpendicular to the direction of movement of the movable seat 311. The guide member 317 can also slide relative to the first drilled portion 111, with its sliding direction perpendicular to its own axis and inclined relative to the direction of movement of the movable seat 311. In this embodiment, it is preferable that the guide member 317 is located at the opening of the clearance space 14 near the axis of the first drilled portion 111; and preferably, the sliding trajectory of the guide member 317 relative to the first drilled portion 111 is an arc with the axis of the clearance space 14 as its axis.
[0048] The elastic element 318 is installed inside the first drilled portion 111 and has the tendency to drive the guide 317 to slide to its limit position away from the clearance space 14, and when the guide 317 slides down to its limit position, its axis intersects with the axis of the first drilled portion 111. In this embodiment, the elastic element 318 is preferably a compression spring.
[0049] The end of the block 316 near the rotating rod 313 has a guide groove 3161 on its outer side for the guide member 317 to be inserted. The guide groove 3161 extends through the top of the block 316 along its axial direction, and the side near the bottom of the block 316 has a guide surface 3162 for contacting the guide member 317. In this embodiment, the guide surface 3162 is preferably an inclined annular surface, and its inclination direction is consistent with the inclination direction of the bottom surface of the block 316.
[0050] The blocking block 316 has a slot 3163 at the lowest point of the guide surface 3162 that is adapted to the guide member 317. When the movable seat 311 moves upward to the limit position and the guide member 317 slides to the limit position in the direction away from the clearance space 14, its bottom engages with the slot 3163. At this time, the bottom of the blocking block 316 blocks the opening of the clearance space 14, and its bottom surface is flush with the conical surface of the first drilling part 111. At this time, the position of the blocking block 316 relative to the first drilling part 111 is fixed to reduce the probability that its rotation relative to the rotating rod 313 during the drilling process will affect the drilling effect and efficiency.
[0051] Furthermore, when the movable seat 311 moves upward to make the guide 317 contact the guide surface 3162, there are two situations: First, the guide 317 is directly inserted into the slot 3163. At this time, after the movable seat 311 moves upward to its limit position, the blocking block 316 just blocks the opening of the clearance space 14 and the bottom surface is flush with the conical surface of the first drilled part 111. Second, the guide 317 contacts the guide surface 3162 at a position other than the slot 3163. During this process, the movement of the seat will drive the guide 317 to slide and rotate upward relative to the first drilled part 111, thereby guiding the blocking block 316 to rotate relative to the rotating rod 313 until the guide 317 and the slot 3163 are aligned along the movement direction of the movable seat 311.
[0052] Furthermore, in order to reduce the probability that cement and soil blocks will enter the clearance space 14 during the mixing and fusion of cement and soil blocks by the mixing component 31 and affect the normal operation of the mixing component 31, it is preferable that the end of the rotating rod 313 near the movable seat 311 has a sealing part 3131 for sealing the opening of the clearance space 14.
[0053] When the movable seat 311 moves downward to its limit position, the sealing part 3131 seals the opening of the clearance space 14, and the bottom surface of the sealing part 3131 contacts the top of the guide 317. At this time, as the rotating rod 313 rotates and drives the spiral blade 315 to mix and blend the cement and soil, the rotating rod 313 also drives the guide 317 to rotate relative to the first borehole 111 through the sealing part 3131. The rotating guide 317 can also mix and blend the cement and soil located below the first borehole 111 near the opening of the clearance space 14, thereby effectively reducing the mixing dead zone. In other embodiments, the number of guides 317 and the number of slots 3163 on the blocking block 316 can also be increased, so that more guides 317 can rotate during the mixing process to reduce the mixing dead zone.
[0054] The implementation principle of a mixing pile machine suitable for silty clay roadbeds in saturated coastal sections according to an embodiment of this application is as follows: After the pile body 1 is drilled on the foundation, during the process of mixing and blending cement and soil by the mixing component 31, the guide 317 rotates with the rotating rod 313 to mix the cement and soil near the opening of the clearance space 14 to reduce the dead corner of mixing. At the same time, the sealing part 3131 seals the opening of the clearance space 14, effectively preventing cement and soil from entering the clearance space 14 during the mixing process and affecting the normal operation of the mixing component 31. After mixing is completed, during the process of controlling the movable seat 311 to move upward to the limit position and retracting the mixing assembly 31, the guide 317 can contact the guide surface 3162 to guide the block 316 to rotate relative to the rotating rod 313 until the guide 317 is aligned with the slot 3163 along the moving direction of the movable seat 311. At this time, after the movable seat 311 moves upward to the limit position, the block 316 can seal the opening of the clearance space 14 while the bottom plate surface is flush with the conical surface of the first drilled hole 111.
[0055] 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 mixing pile machine suitable for silty clay roadbeds in saturated coastal sections, characterized in that, It includes the pile body (1), the grouting device (2) and the mixing device (3). The bottom of the pile body (1) has a drilling structure (11), and its top has several protrusions (12) extending outward perpendicular to the drilling direction. The grouting device (2) includes several grout delivery pipes (21); several grout outlet holes are provided on the pile body (1), and the grout delivery pipes (21) are located inside the pile body (1), with one end connected to the grout outlet holes and the other end supplying grout through a pipeline; The mixing device (3) includes several mixing components (31). The pile body (1) has several clearance spaces (14) for the installation of the mixing components (31) near the drilling structure (11), and the bottom of the clearance space (14) has an opening. The stirring assembly (31) includes a movable seat (311), a first driving member (312), a rotating rod (313), a second driving member (314), and a spiral blade (315). The movable seat (311) is disposed inside the pile body (1) and is movably connected to the pile body (1) along the drilling direction. The first driving member (312) is used to drive the movable seat (311) to move. The rotating rod (313) is rotatably connected to the movable seat (311), and its rotation axis is parallel to the drilling direction. The second driving member (314) is used to drive the rotating rod (313) to rotate. The spiral blade (315) is sleeved and fixed outside the rotating rod (313), and the axis of its spiral trajectory coincides with the rotation axis of the rotating rod (313). The movable seat (311) movably drives the rotating rod (313) to enter and exit the clearance space (14).
2. The mixing pile machine according to claim 1, suitable for silty clay roadbeds in saturated coastal sections, is characterized in that, The drilling structure (11) includes a first drilling section (111) and a second drilling section (112). The first drilled portion (111) is located at the bottom of the pile body (1), and the second drilled portion (112) is located at the bottom of the first drilled portion (111); the surface of the second drilled portion (112) has drilled patterns, the radial dimension of the bottom of the first drilled portion (111) is smaller than the radial dimension of the top of the second drilled portion (112), and the clearance space (14) forms an opening on the first drilled portion (111).
3. A mixing pile machine suitable for silty clay roadbeds in saturated coastal sections, as described in claim 2, is characterized in that... The slurry outlet is formed at a position in the first drilled portion (111) near the second drilled portion (112).
4. A mixing pile machine for silty clay roadbeds in saturated coastal sections, as described in claim 2, is characterized in that... The stirring assembly (31) further includes a blocking block (316) for sealing the opening of the clearance space (14). The blocking block (316) is located at one end of the rotating rod (313) away from the movable seat (311), and the blocking block (316) seals the opening of the clearance space (14) when the movable seat (311) moves upward to its limit position.
5. A mixing pile machine for silty clay roadbeds in saturated coastal sections, as described in claim 4, is characterized in that... The blocking block (316) is rotatably connected to the rotating rod (313); when the blocking block (316) blocks the opening of the clearance space (14), the bottom surface of the blocking block (316) is flush with the surface of the first drilled part (111) after the blocking block (316) rotates.
6. A mixing pile machine for silty clay roadbeds in saturated coastal sections, as described in claim 5, is characterized in that... The stirring assembly (31) also includes a guide (317). The guide (317) is disposed on the inner wall of the clearance space (14) near its opening and is located inside the first drilled part (111); the block (316) has a guide groove (3161) near the rotating rod (313) for the guide (317) to be inserted, and the side of the guide groove (3161) away from the rotating rod (313) has a guide surface (3162) that contacts the guide (317). During the upward movement of the movable seat (311) to its limit position, the guide (317) contacts the guide surface (3162) and guides the block (316) to rotate relative to the rotating rod (313), so that the surface of the top of the block (316) is finally flush with the surface of the first drilled part (111).
7. A mixing pile machine for silty clay roadbeds in saturated coastal sections, as described in claim 6, is characterized in that... The guide (317) is rotatably connected to the first drilled part (111), and its rotation axis is perpendicular to the movement direction of the movable seat (311).
8. A mixing pile machine for silty clay roadbeds in saturated coastal sections, as described in claim 7, is characterized in that... The rotating rod (313) has a blocking part (3131) at one end near the movable seat (311) for blocking the opening of the clearance space (14). When the movable seat (311) moves downward to the limit position, the blocking part (3131) blocks the opening of the clearance space (14) and contacts the guide (317). At this time, the rotating rod (313) rotates to drive the guide (317) to rotate.
9. A mixing pile machine for silty clay roadbeds in saturated coastal sections, as described in claim 6, is characterized in that... The stirring assembly (31) also includes an elastic element (318); The guide (317) is movably connected to the first drilled portion (111), and its direction of movement is inclined relative to the direction of movement of the movable seat (311); the two ends of the elastic member (318) are respectively connected to the guide (317) and the first drilled portion (111), and it has a tendency to drive the guide (317) downward to the limit position.
10. A mixing pile machine for silty clay roadbeds in saturated coastal sections, as described in claim 6, is characterized in that... The block (316) has a slot (3163) on the guide surface (3162) that is compatible with the guide (317). When the guide (317) is inserted into the slot (3163), the bottom surface of the block (316) is flush with the surface of the first drilled part (111).