Multi-shaft stirring pile drilling device

Abstract

The utility model discloses a multi-shaft stirring pile drilling device, which relates to the field of pile foundation construction, and comprises a plurality of drill rods and drill bits mounted at the lower ends of the drill rods, and further comprises a transverse cutting assembly mounted on the drill rods and used for cutting soil bodies at engaged parts. The transverse cutting assembly is additionally arranged on a traditional multi-shaft stirring pile drill rod, after the drill rod and the drill bit finish forming of the meshing holes, redundant soil bodies at the meshing positions are cut off through the transverse cutting assembly, and the meshing round holes are machined into kidney-shaped holes; the kidney-shaped pile hole is directly obtained, the outline of the pile hole is increased, and the subsequent construction efficiency can be improved; meanwhile, compared with a traditional stirring pile, the effective water stopping thickness of the kidney-shaped pile hole formed pile is larger, and the water stopping effect is better.

Description

Technical Field

[0001] The present application relates to the field of pile foundation construction, and in particular to a multi-axis mixing pile drilling device. Background Art

[0002] Three-axis mixing pile is a type of cement-soil mixing pile with three drill rods. During construction, the mixing blades on the three drill rods interlock and overlap with each other, forming a water-stop curtain wall or reinforcement body when constructing downward. It is an effective form of soft foundation treatment. The cement is sprayed into the soil by a mixing pile machine and fully mixed, so that a series of physical and chemical reactions occur between the cement and the soil, making the soft soil harden and improving the foundation strength.

[0003] During the construction process, the triaxial mixing piles overlap and interlock with each other, and the reinforced body formed is usually used as a water stop wall structure. Figure 1 The resulting pile holes are interlocking circles, with the interlocking area representing the effective waterstop thickness. During interlocking pile construction, components such as a steel cage must be placed inside the pile hole, leaving a limited construction space and impacting efficiency. The effective waterstop thickness of this type of interlocking pile is the thickness of the interlocking area, not the pile diameter, resulting in low utilization efficiency for waterstop piles.

[0004] In view of the above-mentioned prior art, the applicant designed a multi-axis mixing pile drilling device. Utility Model Content

[0005] In order to optimize the construction of three-axis mixing piles, the present application provides a multi-axis mixing pile drilling device, which can cut off the triangular soil at the bite position after the bite pile hole is formed and directly process it into a long waist-shaped pile hole, which helps to improve construction efficiency and the utilization efficiency of water-stop piles.

[0006] The multi-axis mixing pile drilling device provided in this application adopts the following technical solution:

[0007] A multi-axis mixing pile drilling device comprises a plurality of drill rods and drill bits mounted at the lower ends of the drill rods, and also comprises a cross-cutting component mounted on the drill rods for cutting off soil at the engaging parts.

[0008] By adopting this technical solution, after the drill rod and drill bit complete the engagement hole, the cross-cutting assembly then removes excess soil at the engagement area, transforming the circular engagement hole into a waist-shaped hole. This waist-shaped pile hole increases the pile hole profile, helping to improve subsequent construction efficiency. Furthermore, compared to traditional mixing piles, the waist-shaped pile hole has a greater effective water-stopping thickness, resulting in a better water-stopping effect.

[0009] Optionally, the cross-cutting assembly includes a gear set, a chain rack and a scraper; the gear set includes a plurality of gears mounted on the drill rod, the chain rack is mounted on the gear set to form a waist-shaped ring that rotates as the drill rod rotates, and the chain rack surrounds all the drill rods; the motion profile of the scraper is greater than or equal to the profile of the drill bit.

[0010] By adopting the above technical solution, the chain frame is installed on the drill rod using a gear set, and then the gear set is used to rotate with the drill rod to drive the chain frame to rotate. The rotation of the chain frame drives the scraper on its peripheral side to move, scraping off the soil in the interlocking part of the pile hole, and the interlocking hole is processed into a waist-shaped hole; the movement profile of the scraper is greater than or equal to the profile of the drill bit, which can ensure that the entire pile hole is processed.

[0011] Optionally, the gear set includes a driving gear and a driven gear, the driving gear is coaxially fixed on the drill rod of the same rotation direction, and the driven gear is rotatably mounted on the drill rod of the other rotation direction.

[0012] By adopting the above technical solution, the two adjacent drill rods of the multi-axis mixing pile rotate in opposite directions. Through the cooperation of the driving gear and the driven gear, the sprocket frame is fixed on the drill rod and the chain frame rotates with a certain drill rod. There is no need to set up a special driving mechanism, which is easy to achieve.

[0013] Optionally, a plurality of scrapers are evenly arranged along the circumference of the chain frame.

[0014] By adopting the above technical solution, multiple scrapers are evenly arranged, the chain frame is subjected to more uniform force and the operation is more stable.

[0015] Optionally, the chain frame includes a chain body and a knife-mounting plate fixed on the chain, and the scraper is fixed on the knife-mounting plate.

[0016] Optionally, the scraper is configured as a horizontal plate, and one end of the horizontal plate away from the chain frame is configured as an arc angle; a plurality of scrapers are installed on a mounting plate, and the plurality of scrapers are arranged on the mounting plate along the axial direction of the drill rod.

[0017] By adopting the above technical solution, multiple horizontal scrapers are set, and the cutting resistance is small; the scrapers in the form of horizontal plates can fully cover all the soil as the drill rod descends.

[0018] Optionally, the scrapers on adjacent blade mounting plates are arranged at staggered heights.

[0019] By adopting the above technical solution, the cutting resistance and the coverage area of ​​the scraper are taken into consideration to ensure that the excess soil is fully removed.

[0020] Optionally, the scraper is a scraper plate vertically arranged on a blade mounting plate, and the scraper gradually extends from bottom to top.

[0021] By adopting the above technical solution, a vertical scraper plate is directly used as a scraper, which is relatively convenient to design and manufacture; the scraper gradually extends from bottom to top, removing excess soil in multiple times, thereby reducing cutting resistance.

[0022] Optionally, the drill rod is a winged drill rod having a plurality of wing plates arranged along the axial direction of the rod body; the cross-cutting assembly is installed on the rod body between the wing plates and / or between the wing plates and the drill bit.

[0023] By adopting the above technical solution, the installation positions of the cross-cutting components are rationally arranged, and the cross-cutting components are arranged by utilizing the gaps designed in the drill pipe itself, thereby reducing the difficulty of design and manufacturing.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. This application discloses a multi-axis mixing pile drilling device that adds a cross-cutting assembly to a conventional multi-axis mixing pile drill rod. After the drill rod and drill bit complete the formation of the interlocking hole, the cross-cutting assembly is used to remove excess soil at the interlocking location, processing the interlocking circular hole into a waist-shaped hole. The resulting waist-shaped pile hole increases the pile hole profile and helps improve subsequent construction efficiency. Furthermore, compared with conventional mixing piles, the waist-shaped pile hole has a greater effective water-stopping thickness and a better water-stopping effect.

[0026] 2. The scraper adopts multiple horizontal plates, which has low cutting resistance and prevents excessive increase in pile foundation power requirements and drill pipe load; the horizontal plate scraper can fully cover all soil as the drill pipe descends. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the pile hole structure of a triaxial mixing pile;

[0028] Figure 2 This is a schematic diagram of the overall structure of Example 1 of the present application;

[0029] Figure 3 yes Figure 1 Schematic diagram of the cross-sectional component structure;

[0030] Figure 4 Schematic diagram of the structure of the chain frame and scraper of Example 1 of the present application;

[0031] Figure 5 This is a schematic diagram of the pile hole structure of a three-axis mixing pile in Example 1 of the present application;

[0032] Figure 6 This is a schematic diagram of the cross-sectional assembly structure of Example 2 of the present application;

[0033] Figure 7 This is a schematic diagram of the cross-sectional assembly structure of the five-axis mixing pile in Example 3 of this application.

[0034] Figure 8 This is a schematic diagram of the cross-sectional assembly structure of the dual-axis mixing pile in Example 4 of the present application;

[0035] Figure 9 This is a schematic diagram of the cross-sectional assembly structure of the four-axis mixing pile in Example 4 of the present application;

[0036] Figure 10 It is a structural schematic diagram of the chain rack and scraper of Example 5 of the present application.

[0037] Description of the drawings: 1. Drill rod; 11. Wing plate; 2. Drill bit; 3. Cross-cutting assembly; 4. Gear set; 41. Drive gear; 42. Driven gear; 5. Chain rack; 6. Scraper; 61. Knife mounting plate 61. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-10 This application is described in further detail.

[0039] Example 1

[0040] This embodiment discloses a multi-axis mixing pile drilling device, referring to Figure 2 , including a drill rod 1, a drill bit 2 and a cross-cutting assembly 3, the drill bit 2 is fixed to the lower end of the drill rod 1, and the cross-cutting assembly 3 is installed on the drill rod 1 to cut off excess soil in the bite hole; this embodiment is a drilling device for triaxial mixing piles, three drill rods 1 are provided, the drill rods 1 on both sides rotate clockwise, and the middle drill rod 1 rotates counterclockwise; the drill rod 1 is a winged drill rod 1 with a mixing wing plate 11, and multiple wing plates 11 are provided along the axial direction of the drill rod 1, the cross-cutting assembly 3 is located on the rod body between the wing plate 11 of the middle drill rod 1 and the drill bit 2, and the cross-cutting assembly 3 is located between the two rows of wing plates 11 at the lower ends of the drill rods 1 on both sides.

[0041] refer to Figure 3 and Figure 4 The cross-cutting assembly 3 includes a gear set 4, a chain frame 5 and a scraper 6. The gear set 4 includes a driving gear 41 and a driven gear 42. The driving gear 41 is coaxially fixed on the drill rod 1 that rotates clockwise on both sides, and the driven gear 42 is rotatably installed on the drill rod 1 that rotates counterclockwise in the middle. The chain frame 5 adopts a trapezoidal chain. The chain frame 5 is arranged on the gear set 4 in a circle, and the chain frame 5 forms a waist-shaped ring. The drill rod 1 drives the driving gear 41 to rotate, and the driving gear 41 drives the chain frame 5 to rotate, and the driven gear 42 supports the chain frame 5. Multiple scrapers 6 are evenly arranged along the circumference of the chain frame 5; a knife plate 61 is fixed to one side of the chain frame 5 based on the gear set 4, and the knife plate 61 is welded or fixed to the chain frame 5 with screws; the scraper 6 and the knife plate 61 are formed as one piece.

[0042] The scraper 6 is set as a horizontal plate to reduce cutting resistance, and the end of the horizontal plate away from the chain frame 5 is set to an arc angle to reduce wear; multiple scrapers 6 are set along the height direction on a knife mounting plate 61, and the scrapers 6 on adjacent knife mounting plates 61 are staggered in height to provide a more comprehensive cutting range.

[0043] The implementation principle of the multi-axis mixing pile drilling device disclosed in the embodiment of the present application is as follows: Figure 1 and Figure 5 A crosscutting assembly 3 is added to the traditional multi-axis mixing pile drill rod 1. After the drill rod 1 and drill bit 2 complete the engagement hole, the crosscutting assembly 3 is used to remove excess soil at the engagement area, transforming the circular engagement hole into a waist-shaped hole. This waist-shaped pile hole increases the pile hole profile and helps improve subsequent construction efficiency. Furthermore, compared to traditional mixing piles, the waist-shaped pile hole has a greater effective waterstop thickness and better waterstopping effect. The scraper 6 utilizes multiple horizontal plates, which provide low cutting resistance and prevent excessive increases in pile foundation power requirements and the load on the drill rod 1. The horizontal plate-shaped scraper 6 fully covers all soil as the drill rod 1 descends.

[0044] Example 2

[0045] refer to Figure 6 The difference between this embodiment and embodiment 1 is that when used in a three-axis mixing pile, the overall length of the chain frame 5 is shorter, and the support requirements are explained. The driven gear 42 on the middle counterclockwise drill rod 1 can be omitted.

[0046] Example 3

[0047] refer to Figure 7 This embodiment differs from Embodiment 1 in that it is applied to a five-axis mixing pile scenario, and each drill rod is provided with a driving gear 41 or a driven gear 42. The two driven gears 42 primarily serve to assist in supporting the chain frame 5; the middle driving gear 41 not only supports the chain frame 5 but also assists in driving the chain frame 5 to rotate, helping to enhance the cutting force of the scraper 6. The driving gears 41 on both sides serve as the primary support and drive.

[0048] Example 4

[0049] refer to Figure 8 and Figure 9 This embodiment differs from Implementation 1 in that the present solution can also be applied to other multi-axis mixing pile scenarios. When the number of drill rods 1 is even (for example, two or four axes), the driven gear 42 serves as the primary support for one end of the chain frame 5. The middle driven gear 42 primarily supports the chain frame 5; the middle drive gear 41 not only supports the chain frame 5 but also assists in driving the chain frame 5 to rotate, thereby enhancing the cutting force of the scraper 6.

[0050] Example 5

[0051] refer to Figure 10 The difference between this embodiment and embodiment 1 is that the scraper 6 is a scraper plate vertically arranged on the blade mounting plate 61, and the scraper 6 gradually extends from bottom to top. The scraper structure is simple and easy to manufacture. The cutting structure design of the component extending from bottom to top increases little by little during the process of removing the soil, thereby reducing the cutting resistance of the soil.

[0052] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A multi-axis mixing pile drilling device, comprising a plurality of drill rods (1) and a drill bit (2) mounted at the lower end of the drill rods (1), characterized in that: It also includes a cross-cutting component (3) installed on the drill rod (1) to cut off the soil at the bite position; The cross-cutting assembly (3) comprises a gear set (4), a chain rack (5) and a scraper (6); the gear set (4) comprises a plurality of gears mounted on a drill rod (1); the chain rack (5) is mounted on the gear set (4) to form a waist-shaped ring that rotates with the rotation of the drill rod (1); the chain rack (5) surrounds all the drill rods (1); and the motion profile of the scraper (6) is greater than or equal to the profile of the drill bit (2).

2. A multi-axis mixing pile drilling device according to claim 1, characterized in that: The gear set (4) comprises a driving gear (41) and a driven gear (42); the driving gear (41) is coaxially fixed on a drill rod (1) of the same rotation direction, and the driven gear (42) is rotatably mounted on a drill rod (1) of the other rotation direction.

3. The multi-axis mixing pile drilling device according to claim 1, characterized in that: A plurality of scrapers (6) are evenly arranged along the circumference of the chain frame (5).

4. A multi-axis mixing pile drilling device according to claim 3, characterized in that: The chain frame (5) comprises a chain body and a knife-mounting plate (61) fixed on the chain, and the scraper (6) is fixed on the knife-mounting plate (61).

5. The multi-axis mixing pile drilling device according to claim 4, characterized in that: The scraper (6) is configured as a horizontal plate, and one end of the horizontal plate away from the chain frame (5) is configured as an arc angle; a plurality of scrapers (6) are mounted on a blade mounting plate (61), and the plurality of scrapers (6) are arranged on the blade mounting plate (61) along the axial direction of the drill rod (1).

6. The multi-axis mixing pile drilling device according to claim 5, characterized in that: The scrapers (6) on the adjacent blade mounting plates (61) are arranged in a staggered manner.

7. The multi-axis mixing pile drilling device according to claim 4, characterized in that: The scraper (6) is a scraping plate vertically arranged on a blade mounting plate (61), and the scraper (6) gradually extends from bottom to top.

8. The multi-axis mixing pile drilling device according to claim 1, characterized in that: The drill rod (1) is a winged drill rod (1) having a plurality of wing plates (11) arranged along the axial direction of the rod body; the cross-cutting assembly (3) is mounted on the rod body between the wing plates (11) and / or between the wing plates (11) and the drill bit (2).

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