Bidirectional stirring equipment for improving overall uniformity of pile body
The bidirectional mixing equipment with a large circulation structure and sickle-shaped blade design solves the problem of uneven pile strength, achieves overall uniformity of the pile body, and improves the consistency of pile body quality.
Patent Information
- Application Number
- CN202511278940.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2025-09-02
- Filing Date
- 2025-09-09
- Publication Date
- 2025-10-10
AI Technical Summary
In the existing two-way mixing technology, the injection medium and the soil layer are mixed unevenly, resulting in uneven strength of the pile body, especially the uneven quality between different strata.
It adopts a large circulation structure and sickle-shaped blade design. The inner and outer drill rods rotate in opposite directions, combined with the inward and outward lifting effects, to ensure that the solidified slurry is fully mixed in the radial and longitudinal directions to form a uniform pile body.
The uniformity of the overall strength of the pile body is achieved, ensuring that the solidified soil in different soil layers is fully mixed, and improving the consistency of the pile body quality.
Smart Images
Figure CN120759251A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of pile foundation equipment, in particular to a bidirectional mixing equipment for improving the overall uniformity of pile body. BACKGROUND
[0002] Soft soil refers to natural fine-grained soil deposited in coastal, lacustrine, valley and river beach, with high water content, large void ratio, high compressibility and low shear strength. More and more highway, railway construction and port construction will inevitably pass through soft soil foundation area, and the strength of the foundation is enhanced by cement soil mixing pile, which is a common improvement measure. Bidirectional mixing pile is a kind of composite foundation formed by mixing soft soil and solidification material at deep foundation through special mixing machinery and slurry pump, and a series of physical and chemical reactions between the solidification material and the soft soil make the soft soil harden into a composite foundation with integrity, water stability and high bearing capacity.
[0003] At present, the two major problems existing in bidirectional mixing construction are that the mixing of jet medium (cement slurry or powder material) and soil layer is not uniform, and the geological parameters of different strata are quite different, so that the quality of pile body at different depths is uneven when using the same solidification material for reinforcement. The existing bidirectional mixing technology sets the jetting port on the surface of the inner drill rod, and the slurry is prone to joint filling and aggregation, which leads to uneven strength of the pile body after hardening, and even the strength of the pile center is much higher than that of the pile edge.
[0004] Therefore, it is necessary to fundamentally improve and design the existing mixing equipment, otherwise the applicability of bidirectional mixing technology will be limited. Based on this, the present application provides a bidirectional mixing equipment for improving the overall uniformity of pile body. SUMMARY
[0005] In view of the above technical problems existing in the prior art, the present application provides a bidirectional mixing equipment for improving the overall uniformity of pile body, which overcomes the shortcomings of the prior art. When the mixing pile crosses different soil layers, the mixing effect is inconsistent, and the solidified soil in the upper layer and the lower layer cannot be fully mixed to form uniform material after uniform mixing in the same stratum. By setting a large circulation structure, the whole pile is fully mixed and uniform, ensuring the overall strength of the pile body. During radial mixing, the two layers of sickle-shaped blades on the inner drill bit form an inward and outward throwing effect, which promotes the full mixing of the solidified slurry in the radial range.
[0006] A bidirectional mixing device for improving the overall uniformity of a pile body comprises a power head, an inner drill rod, an outer drill rod, a casing, a transmission wheel, a chain, a rib plate, an inner drill bit and an outer drill bit; the power head drives the inner drill rod and the outer drill rod to rotate in opposite directions, the lower ends of the inner drill rod and the outer drill rod are connected to the inner drill bit and the outer drill bit respectively, a casing is coaxially arranged on the outer side of the outer drill rod, and two sets of large circulation structures are symmetrically arranged on the casing; the large circulation structure comprises: a transmission wheel is arranged between the casing and the power head, the transmission wheel drives the chain to rotate in a ring, a stirring plate is arranged on the chain, the rib plate is welded to the casing and is located between the chain rings; the blades of the inner drill bit are arranged in a sickle-shaped structure.
[0007] Preferably, the power head structure includes a motor, an inner drill rod drive shaft, an inner drill rod gear, an outer drill rod drive shaft, an outer drill rod gear, a slurry pipe, and a large circulation structure driving motor. The motor drives the inner drill rod drive shaft and the outer drill rod drive shaft to rotate. The inner drill rod drive shaft engages with the inner drill rod gear for transmission. The outer drill rod drive shaft engages with the outer drill rod gear for transmission. The outside of the slurry pipe is connected to the faucet structure, and the inside is connected to the inside of the inner drill rod to transfer the slurry to the inner drill bit and spray it out.
[0008] Preferably, the transmission wheel is fixed by a transmission shaft, one end of the transmission shaft is connected to the large circulation structure drive motor, and the other end is connected to the sleeve through a bearing.
[0009] Preferably, the inner drill rod, outer drill rod and casing are all coaxially arranged, the casing is on the outside of the outer drill rod, the casing and the outer drill rod are sealed by a sealing sleeve, the channel between the casing and the outer drill rod serves as a high-pressure gas channel, and a gas nozzle is provided on the casing to determine whether to add gas according to the construction conditions.
[0010] Preferably, the length of the rib plate is the clearance height between the two transmission wheels, the outermost side of the rib plate is the same as the outermost side of the outer drill bit, and the rib plate is provided with holes along the length direction, and holes of different spacings are selected according to different project requirements.
[0011] Preferably, at least two layers of blades are arranged on the inner drill bit, and both layers of blades are sickle-shaped structures, but the bending directions of the two layers of blades are opposite.
[0012] The beneficial technical effects brought about by the present invention are: When mixing piles span different soil layers, the mixing effect is inconsistent. Even after mixing evenly within the same layer, the solidified soil in the upper and lower layers cannot be fully mixed to form a uniform material. By setting up a large circulation structure, the entire pile is fully mixed, ensuring uniform strength throughout the pile. During radial mixing, the two sickle-shaped blades on the inner drill bit create an inward and outward movement, promoting thorough mixing of the solidified slurry within the radial range. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1This is a cross-sectional schematic diagram of a bidirectional mixing device for improving the overall uniformity of a pile body according to the present invention.
[0014] Figure 2 This is a side schematic diagram of a bidirectional mixing device for improving the overall uniformity of a pile body according to the present invention.
[0015] Figure 3 This is a schematic diagram of the inner drill bit structure of a bidirectional mixing device for improving the overall uniformity of the pile body according to the present invention.
[0016] Figure 4 This is a schematic diagram of the opposite-side circulation of solidified slurry during the use of a bidirectional mixing device for improving the overall uniformity of the pile body according to the present invention.
[0017] Figure 5 This is a schematic diagram of the same-side circulation of solidified slurry during use of a bidirectional mixing device for improving the overall uniformity of a pile body according to the present invention.
[0018] Among them, 1-power head, 2-inner drill rod, 3-outer drill rod, 4-casing, 5-drive wheel, 6-chain, 7-rib, 8-inner drill bit, 9-outer drill bit, 11-motor, 12-inner drill rod drive shaft, 13-inner drill rod gear, 14-outer drill rod drive shaft, 15-outer drill rod gear, 16-slurry pipe, 17-large circulation structure drive motor. DETAILED DESCRIPTION Example
[0019] like Figures 1 to 5 As shown, a bidirectional mixing equipment for improving the overall uniformity of the pile body includes a power head 1, an inner drill rod 2, an outer drill rod 3, a casing 3, a transmission wheel 5, a chain 6, a rib 7, an inner drill bit 8, and an outer drill bit 9; the power head 1 drives the inner drill rod 2 and the outer drill rod 3 to rotate in opposite directions, and the lower ends of the inner drill rod 2 and the outer drill rod 3 are connected to the inner drill bit 8 and the outer drill bit 9 respectively, and the casing 3 is coaxially arranged on the outer side of the outer drill rod 3, and two sets of large circulation structures are symmetrically arranged on the casing 3; the large circulation structure includes: a transmission wheel 5 is arranged between the casing 3 and the power head 1, the transmission wheel 5 drives the chain 6 to rotate in a ring, and a stirring plate is arranged on the chain 6, and the rib 7 is welded on the casing 3 and is located between the rings of the chain 6; the blades of the inner drill bit 8 are arranged in a sickle-shaped structure.
[0020] Preferably, the power head 1 structure includes a motor 11, an inner drill rod drive shaft 12, an inner drill rod gear 13, an outer drill rod drive shaft 14, an outer drill rod gear 15, a slurry pipe 16, and a large circulation structure drive motor 17. The motor 11 drives the inner drill rod drive shaft 12 and the outer drill rod drive shaft 14 to rotate, the inner drill rod drive shaft 12 engages with the inner drill rod gear 13 for transmission, and the outer drill rod drive shaft 14 engages with the outer drill rod gear 15 for transmission. The outside of the slurry pipe 16 is connected to the faucet structure, and the inside is connected to the inside of the inner drill rod 2, so as to transfer the slurry to the inner drill bit 8 and spray it out.
[0021] Preferably, the transmission wheel 5 is fixed by a transmission shaft, one end of the transmission shaft is connected to the large circulation structure drive motor 17, and the other end is connected to the sleeve 3 through a bearing.
[0022] Preferably, the inner drill rod 2, the outer drill rod 3 and the casing 3 are all coaxially arranged, the casing 3 is on the outside of the outer drill rod 3, the casing 3 and the outer drill rod 3 are sealed by a sealing sleeve, the channel between the casing 3 and the outer drill rod 3 serves as a high-pressure gas channel, and a gas nozzle is provided on the casing 3, and whether to add gas is determined according to the construction conditions.
[0023] Preferably, the length of the rib 7 is the clearance height between the two transmission wheels 5, the outermost side of the rib 7 is the same as the outermost side of the outer drill bit 9, and the rib 7 is provided with holes along the length direction, and holes of different spacings are selected according to different project requirements.
[0024] Preferably, at least two layers of blades are arranged on the inner drill bit 8, and both layers of blades are sickle-shaped structures, but the bending directions of the two layers of blades are opposite. Example
[0025] like Figures 1 to 5 As shown, a bidirectional mixing equipment for improving the overall uniformity of the pile body includes a power head 1, an inner drill rod 2, an outer drill rod 3, a casing 3, a transmission wheel 5, a chain 6, a rib 7, an inner drill bit 8, and an outer drill bit 9; the power head 1 drives the inner drill rod 2 and the outer drill rod 3 to rotate in opposite directions, and the lower ends of the inner drill rod 2 and the outer drill rod 3 are connected to the inner drill bit 8 and the outer drill bit 9 respectively, and the casing 3 is coaxially arranged on the outer side of the outer drill rod 3, and two sets of large circulation structures are symmetrically arranged on the casing 3; the large circulation structure includes: a transmission wheel 5 is arranged between the casing 3 and the power head 1, the transmission wheel 5 drives the chain 6 to rotate in a ring, and a stirring plate is arranged on the chain 6, and the rib 7 is welded on the casing 3 and is located between the rings of the chain 6; the blades of the inner drill bit 8 are arranged in a sickle-shaped structure. When mixing piles span different soil layers, the mixing effect is inconsistent. After the same layer is mixed evenly, it cannot migrate vertically. That is, the solidified soil in the upper and lower layers cannot be fully mixed to form a uniform material. By setting up a large circulation structure, the entire pile is fully mixed and uniform, ensuring the overall strength of the pile body. During radial mixing, the two layers of sickle-shaped blades on the inner drill bit 8 form an inward and outward movement, promoting the thorough mixing of the solidified slurry within the radial range.
[0026] Preferably, the power head 1 structure includes a motor 11, an inner drill rod drive shaft 12, an inner drill rod gear 13, an outer drill rod drive shaft 14, an outer drill rod gear 15, a slurry pipe 16, and a large circulation structure drive motor 17. The motor 11 drives the inner drill rod drive shaft 12 and the outer drill rod drive shaft 14 to rotate, the inner drill rod drive shaft 12 engages with the inner drill rod gear 13 for transmission, and the outer drill rod drive shaft 14 engages with the outer drill rod gear 15 for transmission. The outside of the slurry pipe 16 is connected to the faucet structure, and the inside is connected to the inside of the inner drill rod 2, so as to transfer the slurry to the inner drill bit 8 and spray it out.
[0027] Preferably, the transmission wheel 5 is fixed by a transmission shaft, one end of the transmission shaft is connected to the large circulation structure drive motor 17, and the other end is connected to the sleeve 3 through a bearing.
[0028] Preferably, the inner drill rod 2, outer drill rod 3, and casing 3 are coaxially arranged, with the casing 3 located outside the outer drill rod 3. The casing 3 and outer drill rod 3 are sealed by a sealing sleeve. The passage between the casing 3 and outer drill rod 3 serves as a high-pressure gas passage, and a gas nozzle is provided on the casing 3. Whether to add gas depends on the construction situation. By adding gas and using gas to lift the slurry, the solidified slurry is further mixed.
[0029] Preferably, the length of the rib 7 is the clearance height between the two transmission wheels 5, and the outermost side of the rib 7 is the same as the outermost side of the outer drill bit 9. The two ribs 7 divide the pile body into two parts, and the longitudinal movement of the chain 6 causes the solidified slurry to migrate longitudinally. When the two chains 6 rotate in the same direction, the two spaces separated by the ribs 7 have the solidified slurry in one space migrate upward as a whole, and the solidified slurry in the other space migrates downward as a whole, thus forming a large circulation of the entire pile. The ribs 7 are provided with holes along the length direction, and holes of different spacings are selected to be opened according to the requirements of different projects. The holes are provided on the ribs 7 to change the depth of the circulation. For example, if the entire pile spans fewer strata, mainly two strata, then the hole spacing can be set a little larger. When the two chains 6 rotate in opposite directions, the two spaces separated by the ribs 7 have the solidified slurry in the two spaces migrate half upward and half downward, thus forming a large circulation of half a pile.
[0030] Preferably, at least two layers of blades are arranged on the inner drill bit 8. Both layers of blades are sickle-shaped, but the bending directions of the two layers of blades are opposite. The different bending directions of the two layers of blades ensure that the inward turning and outward lifting are not performed on the same layer. In this way, after radial migration and stirring, the mixture migrates again, resulting in a better mixing effect.
[0031] In the description of the embodiments of the present invention, it should be understood that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "setting" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood based on specific circumstances.
[0032] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention also fall within the scope of protection of the present invention.
Claims
1. A bidirectional mixing device for improving the overall uniformity of a pile body, characterized in that: It includes a power head, an inner drill rod, an outer drill rod, a casing, a transmission wheel, a chain, a rib plate, an inner drill bit and an outer drill bit; the power head drives the inner drill rod and the outer drill rod to rotate in opposite directions, the lower ends of the inner drill rod and the outer drill rod are connected to the inner drill bit and the outer drill bit respectively, a casing is coaxially arranged on the outer side of the outer drill rod, and two sets of large circulation structures are symmetrically arranged on the casing; the large circulation structure includes: a transmission wheel is arranged between the casing and the power head, the transmission wheel drives the chain to rotate in a ring, a stirring plate is arranged on the chain, the rib plate is welded on the casing and is located between the chain rings; the blades of the inner drill bit are arranged in a sickle-shaped structure.
2. A bidirectional mixing device for improving the overall uniformity of a pile body according to claim 1, characterized in that: The power head structure includes a motor, an inner drill rod drive shaft, an inner drill rod gear, an outer drill rod drive shaft, an outer drill rod gear, a slurry pipe, and a large circulation structure drive motor. The motor drives the inner drill rod drive shaft and the outer drill rod drive shaft to rotate. The inner drill rod drive shaft engages with the inner drill rod gear for transmission. The outer drill rod drive shaft engages with the outer drill rod gear for transmission. The outside of the slurry pipe is connected to the faucet structure, and the inside is connected to the inside of the inner drill rod, so as to transfer the slurry to the inner drill bit and spray it out.
3. The bidirectional mixing equipment for improving the overall uniformity of the pile body according to claim 1, characterized in that: The transmission wheel is fixed by a transmission shaft, one end of the transmission shaft is connected to the large circulation structure drive motor, and the other end is connected to the sleeve through a bearing.
4. The bidirectional mixing equipment for improving the overall uniformity of the pile body according to claim 1, characterized in that: The inner drill rod, outer drill rod and casing are all coaxially arranged. The casing is on the outside of the outer drill rod. The casing and the outer drill rod are sealed by a sealing sleeve. The channel between the casing and the outer drill rod serves as a high-pressure gas channel, and a gas nozzle is set on the casing. Whether to add gas is determined according to the construction situation.
5. The bidirectional mixing equipment for improving the overall uniformity of the pile body according to claim 1, characterized in that: The length of the rib plate is the clearance height between the two transmission wheels. The outermost side of the rib plate is the same as the outermost side of the outer drill bit. The rib plate is provided with holes along the length direction. Holes of different spacings can be selected according to different project requirements.
6. The bidirectional mixing equipment for improving the overall uniformity of the pile body according to claim 1, characterized in that: At least two layers of blades are arranged on the inner drill bit. Both layers of blades are sickle-shaped structures, but the bending directions of the two layers of blades are opposite.