An inclined drilling jet grouting and mixing pile planting equipment

Abstract

The present invention discloses an inclined drilling jet grouting and mixing pile planting device. Two slurry injection ports are symmetrically arranged at the ends of two slurry conveying pipes at the drill bit with respect to the axis of the drill bit. There is at least one concentric positioning frame in the core pile to make the drill pipe concentric with the core pile. A arrow-shaped mixing blade with a wide upper part and a pointed lower part is fixed at the bottom end of the drill bit. The bottom end of the core pile has a conical structure with a large upper part and a small lower part for sinking into the soil body. A tubular slide rail sleeve is fixed at the bottom of the middle section of the inclined support frame. A tubular slide rail is slidably fitted in the tubular slide rail sleeve. A driving oil cylinder is sleeved in the tubular slide rail and the tubular slide rail sleeve and extends upward out of the tubular slide rail sleeve. The tail end of the driving oil cylinder is hinged on the inclined support frame. The free end of the piston rod of the driving oil cylinder is hinged with a trough-shaped bracket that opens upward and is used for supporting the core pile. The trough-shaped bracket is fixed to the bottom end of the tubular slide rail. This inclined drilling jet grouting pile planting device can prevent the lower ends of the drill pipe and the core pile from sagging, has a high straightness of the drilled hole, and has a good concentricity between the core pile and the jet grouting pile.

Description

Technical Field

[0001] The present invention relates to the technical field of foundation pit support, and particularly to an inclined drilling jet grouting and mixing pile planting device. Background Art

[0002] In the technical field of foundation pit support, with the extensive promotion and application of inclined supports for foundation pits, the inclined drilling jet grouting and mixing pile planting device, i.e., the auxiliary device, has attracted more and more attention from technical personnel.

[0003] Currently, for the more commonly used inclined supports, from bottom to top, the general structure is a combined inclined pile composed of a steel lattice column, a steel pipe pile, or a precast reinforced concrete pipe pile and other core piles wrapped by a cement-soil jet grouting and mixing pile or a high-pressure cement jet grouting and mixing pile below the foundation pit floor; a steel support composed of a steel lattice column or a steel pipe pile above the foundation pit floor connected to the top of the combined inclined pile; and the top of the steel support is fixedly connected to the steel bracket of the capping beam at the top of the foundation pit retaining wall or the foundation pit retaining row piles.

[0004] For the existing inclined drilling jet grouting and mixing pile planting device for constructing the above-mentioned inclined support, it generally includes a chassis or base of the main machine supported on the foundation pit ground surface. The chassis generally includes traveling mechanisms such as a longitudinal movement mechanism and a transverse movement mechanism; an inclined support frame or a guiding frame for drilling, jet grouting, and mixing pile planting is installed on the chassis, and there is an inclined support frame angle or an inclined support frame slope adjustment oil cylinder between the chassis and the inclined support frame; there is a power head and a pile pressing cap or a fixture for clamping the core pile or the steel support on the inclined support frame, and there is an oil cylinder for connecting or disassembling the drill pipe on the inclined support frame. There are two sets of driving mechanisms composed of a winch, a steel wire rope, and a pulley block on the chassis and the inclined support frame for driving the power head and the pile pressing cap to move linearly along the inclined support frame. One set releases and the other set winds up to drive the power head to drill down with the drill pipe and the drill bit, and the pile pressing cap presses the core pile and the steel support down, or one set winds up and the other set releases to drive the power head to reset with the drill pipe, the drill bit, and the pile pressing cap; a cement slurry delivery pipe or a high-pressure cement slurry delivery pipe connected to the cement slurry source and the pump is installed in the drill pipe, and there is a slurry spraying port at the drill bit. The slurry spraying at the drill bit and the advancement of the core pile and the steel support are carried out synchronously. The high pressure, such as the pressure of the slurry delivery pipe and the pressure of the spraying port, is 20 - 35 MPa.

[0005] However, in the actual construction process, the inclined drilling jet grouting and mixing pile planting equipment of the above existing technologies still has the following deficiencies: Since the drill pipe drills in an inclined manner, and the core pile and steel supports such as steel lattice columns or steel pipe piles are also advanced in an inclined manner, and since the lengths of the drill pipe and the core pile entering the soil body are relatively long, such as about 8 meters deep from the ground surface to the foundation pit bottom slab and about 18 meters deep from the foundation pit bottom slab to the predetermined bottom elevation, with a total of about 26 meters deep, it is very difficult to avoid phenomena such as the lower end of the drill bit and the lower end of the core pile sagging, the drill bit drilling an arc-shaped hole, and the core pile being non-concentric with the cement-soil jet grouting and mixing pile, that is, the protective thickness of the cement-soil jet grouting and mixing pile for the core pile is uneven during the process of the drill pipe drilling and the core pile and steel support advancing. This directly affects the design strength and bearing capacity of the combined inclined pile and steel support, that is, the inclined support of the foundation pit, and it is difficult to ensure that the inclined support has a high ability to resist the lateral soil pressure borne by the foundation pit retaining wall or the foundation pit retaining row piles and the capping beam. There is even a potential safety hazard of foundation pit collapse and it urgently needs to be improved. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide an inclined drilling jet grouting and mixing pile planting equipment that can prevent the lower end of the drill pipe and the lower end of the core pile from sagging, has a good straightness of the hole-forming body, and has a good concentricity between the core pile and the cement-soil jet grouting and mixing pile.

[0007] The technical solution of the present invention is to provide an inclined drilling jet grouting and mixing pile planting equipment, including a chassis, on which an inclined support frame for drilling jet grouting and mixing pile planting is installed. There is an inclined support frame angle adjustment oil cylinder between the chassis and the inclined support frame. There is a power head and a pile pressing cap on the inclined support frame. There is a driving mechanism on the chassis and the inclined support frame for driving the power head and the pile pressing cap to move linearly along the inclined support frame. A cement slurry delivery pipe communicating with the cement slurry source and the pump is installed inside the drill pipe and on the drill bit. The two ends of the two delivery pipes with two slurry spraying ports symmetrically arranged relative to the axis of the drill bit are located at the ends of the two delivery pipes; there is at least one concentric positioning frame in the core pile to make the drill pipe and the core pile concentric; a pointed arrow-shaped mixing blade with a wider upper part and a narrower lower part is fixed at the bottom end of the drill bit; the bottom end of the core pile has a tapered structure with a larger upper part and a smaller lower part for sinking into the soil body; a tubular slide rail sleeve is fixed at the bottom of the middle section of the inclined support frame. A tubular slide rail is slidably fitted inside the tubular slide rail sleeve. A driving oil cylinder is sleeved inside the tubular slide rail and the tubular slide rail sleeve and extends upward outside the tubular slide rail sleeve. The tail end of the driving oil cylinder is hinged on the inclined support frame. The free end of the piston rod of the driving oil cylinder is hinged to a trough-shaped bracket that opens upward and is used to support the core pile. The trough-shaped bracket is fixed to the bottom end of the tubular slide rail.

[0008] After adopting the above structure, the inclined drilling jet grouting mixing pile planting equipment of the present invention has the following advantages: It solves the technical problems that have been hoped to be solved for a long time but have not been well solved. The concentric positioning frame makes the axes of the drill pipe, the drill bit, and the core pile, such as the core pile of a steel lattice column, a steel pipe pile, or a precast reinforced concrete pipe pile, and the axis of the hole-forming body be on the same straight line. The arrow-shaped mixing blade with a wider upper part and a narrower lower part at the bottom end of the drill bit is always centered to make the drill bit drill straight down. The bottom end of the core pile has a conical structure with a larger upper part and a smaller lower part for sinking into the soil. Since it is coaxial with the drill bit and the drill pipe, the conical structure always centers the bottom end of the core pile. The tubular slide rail supports the middle and lower sections of the core pile, and they cooperate with each other axially to keep it in a state of being coaxial with the core pile, the drill pipe, and the drill bit all the time. During the process of the drill bit at the lower end coaxial with the drill pipe drilling and the core pile and the steel support advancing, it can prevent or even avoid the drooping of the lower end of the drill pipe, that is, the drill bit, and the lower end of the core pile. The drilled hole, that is, the hole-forming body, has good straightness, so that the concentricity between the core pile and the cement-soil jet grouting mixing pile is good, that is, they are basically coaxial, thereby making the thickness of the cement-soil jet grouting mixing pile covering the core pile uniform, that is, the protective thickness of the cement-soil jet grouting mixing pile for the core pile is uniform. When constructing with the inclined drilling jet grouting mixing pile planting equipment of the present invention, the design strength and bearing capacity of the combined inclined pile and the steel support, that is, the inclined support of the foundation pit, are greatly improved, and it well ensures that the inclined support of the foundation pit has a high ability to resist the lateral soil pressure borne by the foundation pit retaining wall, the foundation pit retaining row piles, and the capping beam, and basically eliminates or even completely eliminates the potential safety hazard of foundation pit collapse.

[0009] Furthermore, the cross-sectional shape of the concentric positioning frame is the same as the cross-sectional shape of the inner hole of the core pile. The concentric positioning frame is in clearance fit with the inner hole of the core pile, and the circular central hole of the concentric positioning frame is in clearance fit with the outer circumference of the drill pipe. One concentric positioning frame is located at the inner bottom end of the core pile. After adopting the above structure, it can further prevent the lower end of the drill pipe from drooping and the lower end of the core pile from drooping, making the sliding property between the concentric positioning frame and the inner hole of the core pile better, and also making the sliding property between the circular central hole of the concentric positioning frame and the outer circumference of the drill pipe better, making the process of the concentric positioning frame sliding to the positioning position under the drive of the drill pipe for central positioning and retracting for reuse more flexible and convenient, making the concentricity, that is, the coaxiality, between the core pile and the cement-soil jet grouting mixing pile better, and making the protective thickness of the cement-soil jet grouting mixing pile for the core pile more uniform. It further improves the design strength and bearing capacity of the combined inclined pile and the steel support, that is, the inclined support of the foundation pit, further ensures that the inclined support of the foundation pit has a high ability to resist the lateral soil pressure borne by the foundation pit retaining wall, the foundation pit retaining row piles, and the capping beam, and further eliminates the potential safety hazard of foundation pit collapse.

[0010] Furthermore, the conical structure includes a circular steel cylinder located in the central hole at the bottom end of the steel lattice column core pile. Multiple wing pieces with a wide top and a pointed bottom are fixed on the outer circumference of the circular steel cylinder. All of the multiple wing pieces are fixed to the bottom end of the steel lattice column core pile. The inner diameter of the circular steel cylinder is larger than the outer diameter of the drill bit after multiple hinged mixing blades are folded. With the above structure, the circular steel cylinder and the multiple wing pieces with a wide top and a pointed bottom outside the circular steel cylinder position the center of the square steel lattice column core pile, making the concentricity, i.e., the coaxiality, of the square steel lattice column core pile and the jet grouting pile better, and further ensuring the thickness uniformity of the soil-cement jet mixing pile covering the steel lattice column core pile. It further improves the design strength and bearing capacity of the combined inclined pile and the steel support, i.e., the foundation pit inclined support, further ensures that the foundation pit inclined support has a high ability to resist the lateral soil pressure borne by the foundation pit retaining wall or the foundation pit retaining row piles and the capping beam, and further eliminates the potential safety hazard of foundation pit collapse.

[0011] Furthermore, the conical structure is a conical steel sleeve with a large top and a small bottom fixed at the bottom end of the steel pipe pile core pile or the precast reinforced concrete pipe pile core pile. The aperture at the lower end of the conical steel sleeve is larger than the outer diameter of the drill bit after multiple hinged mixing blades are folded. With the above structure, the conical steel sleeve positions the center of the circular steel pipe pile core pile or the precast reinforced concrete pipe pile core pile, making the concentricity, i.e., the coaxiality, of the circular steel pipe pile core pile or the precast reinforced concrete pipe pile core pile and the jet grouting pile better, and further ensuring the thickness uniformity of the soil-cement jet mixing pile covering the steel lattice column core pile. It further improves the design strength and bearing capacity of the combined inclined pile and the steel support, i.e., the foundation pit inclined support, further ensures that the foundation pit inclined support has a high ability to resist the lateral soil pressure borne by the foundation pit retaining wall or the foundation pit retaining row piles and the capping beam, and further eliminates the potential safety hazard of foundation pit collapse.

[0012] Furthermore, the mixing blades of the drill bit at the bottom end of the drill pipe are multiple pieces hinged to the drill bit. When the drill pipe goes down, the multiple mixing blades open upward when encountering the soil to drill a hole. When the drill pipe goes up, the multiple mixing blades fold downward, and the outer diameter of the drill bit is smaller than the aperture of the core pile central hole to facilitate resetting. Since the opening amplitude of each mixing blade is equal each time, the aperture of the formed hole body is always determined. For example, it can be preset that the size of the tubular slide rail just supports on the lower half hole wall of the formed hole body, that is, the tubular slide rail is just located on the boundary line between the original soil layer and the cement slurry mixing body of the formed hole body, that is, the tubular slide rail always slides straight down along the lower half hole wall. Coupled with the arrow-shaped mixing piece with a wide top and a pointed bottom at the bottom end of the drill bit always positioning the center, it further ensures the technical effects of preventing the lower end of the drill pipe and the lower end of the core pile from sagging, having a high straightness of the drilled hole, and good concentricity between the core pile and the jet grouting pile. It further improves the design strength and bearing capacity of the combined inclined pile and the steel support, i.e., the foundation pit inclined support, further ensures that the foundation pit inclined support has a high ability to resist the lateral soil pressure borne by the foundation pit retaining wall or the foundation pit retaining row piles and the capping beam, and further eliminates the potential safety hazard of foundation pit collapse.

[0013] Further, the multiple stirring blades are four stirring blades. Every two stirring blades form a pair and are symmetrically arranged with respect to the axis of the drill bit. The width midlines of the two stirring blades at the upper part of the drill bit in the open state are on the same straight line, and the width midlines of the two stirring blades at the lower part of the drill bit in the open state are also on the same straight line. The perpendicular projection lines of the straight lines of the two upper stirring blades in the open state and the straight lines of the two lower stirring blades in the open state are 90° to each other; the hinge structure of each stirring blade is that a pair of ear plates with hinge holes are fixed on the drill bit. An obliquely hinged plate with a hinge hole is in clearance fit in a slot formed by a pair of first ear plates and is hinged by a first hinge shaft. In the open state, each stirring blade is an obliquely hinged plate and an obliquely stirring plate formed by twisting an integral plate by 90°; there is a limiting structure on the stirring blade and the drill bit to make the same straight line of the two stirring blades form a 90° angle with the axis of the drill bit when the stirring blades are opened. After adopting the above structure, the process of opening and closing the multiple stirring blades is more stable and reliable, the straightness and equal diameter of the formed hole body are better, further ensuring the thickness uniformity of the cement-soil jet grouting mixing pile with a coated core pile. Further improving the design strength and bearing capacity of the combined inclined pile and the steel support, i.e., the inclined foundation pit support, further ensuring that the inclined foundation pit support has a high ability to resist the lateral soil pressure borne by the foundation pit retaining wall or the foundation pit retaining row piles and the capping beam, and further eliminating the potential safety hazard of foundation pit collapse.

[0014] Further, the diameter of the central hole of the conical structure is larger than the outer diameter of the drill bit after the multiple hinged stirring blades are folded up to facilitate the reset of the drill bit. After adopting the above structure, it not only ensures the technical effects of concentricity of the conical structure, good straightness of the drilled hole and equal diameter, but also makes the drilling and return of the drill bit more flexible and reliable. Description of the Drawings

[0015] Figure 1 is a schematic three-dimensional structure diagram of an inclined drilling jet grouting mixing pile planting device of the present invention Figure 1 (The core pile uses a steel lattice column).

[0016] Figure 2 is a schematic three-dimensional structure diagram of an inclined drilling jet grouting mixing pile planting device of the present invention Figure 2 (The core pile uses a hollow reinforced concrete precast pipe pile).

[0017] Figure 3 is Figure 2 an enlarged structural schematic diagram of A in

[0018] Figure 4 is a schematic three-dimensional structure diagram of an inclined drilling jet grouting mixing pile planting device of the present invention Figure 3 (Highlighting the lower end and the back of the rectangular tubular slide rail).

[0019] Figure 5Schematic diagram of the three-dimensional structure of an inclined drilling jet grouting and pile planting device of the present invention Figure 4 (Highlighting the lower end of the rectangular tubular slide rail and the trough-shaped bracket)

[0020] Figure 6 Is Figure 5 An enlarged structural schematic diagram of B in

[0021] Figure 7 Is Figure 1 A structural schematic diagram of the exploded tubular slide rail sleeve and the tubular slide rail in an inclined drilling jet grouting and pile planting device of the present invention in

[0022] Figure 8 Is Figure 7 An enlarged structural schematic diagram of C in

[0023] Figure 9 Is Figure 7 An enlarged structural schematic diagram of D in

[0024] Figure 10 Schematic diagram of the three-dimensional structure of the protruding bottom end of the steel lattice column core pile in an inclined drilling jet grouting and pile planting device of the present invention

[0025] Figure 11 Schematic diagram of the three-dimensional structure of the concentric positioning frame sleeved on the drill pipe and the drill bit fixed to the drill pipe in the present invention

[0026] Figure 12 Schematic diagram of the three-dimensional structure of the concentric positioning frame in the present invention

[0027] Figure 13 is a schematic diagram of the three-dimensional structure of multiple mixing blades installed on the drill bit and in an open state in the present invention

[0028] Figure 14 is a schematic diagram of the three-dimensional structure of multiple mixing blades installed on the drill bit and in a retracted state in the present invention

[0029] As shown in the figure: 1. Crane; 2. Floor surface; 3. Chassis; 4. Hole-forming body; 5. Drill bit; 6. Lower half hole wall; 7. Tubular slide rail; 8. Steel lattice column core pile; 9. Angle adjustment oil cylinder; 10. Pile pressing cap; 11. Power head; 12. Tubular slide rail sleeve; 13. Diagonal brace; 14. Reinforced concrete precast pipe pile core pile; 15. Steel ring; 16. Conical steel sleeve; 17. Stirring blade; 18. Piston rod; 19. Driving oil cylinder; 20. Grooved bracket; 21. Third ear plate; 22. Third hinge shaft; 23. Second hinge shaft; 24. Second ear plate; 25. Square hole; 26. Circular steel cylinder; 27. Fins; 28. Concentric positioning frame; 29. Axial limit ring; 30. Drill pipe; 31. Drill pipe sleeve; 32. Circular central hole; 33. Square frame; 34. First hinge shaft; 35. Grout delivery pipe; 36. Arrow-shaped stirring blade; 37. Grout injection port; 38. Hinged plate; 39. Stirring plate; 40. Two limiting planes; 41. First ear plate; 42. Control room; 43. Connecting plate; 44. Side plate; 45. Oblique cushion block; 46. Bottom end plate. Detailed implementation manners

[0030] The following further describes the detailed implementation manners of the present invention with reference to the accompanying drawings. It should be noted here that the description of these detailed implementation manners is used to help understand the present invention, but does not limit the present invention. In addition, the technical means involved in the following detailed implementation manners of the present invention can be combined with each other as long as they do not conflict with each other.

[0031] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 、 Figure 12 shown in FIGS. 13 and 14.

[0032] The present invention relates to an inclined drilling jet grouting and mixing pile planting equipment, which includes the chassis 3 of the main machine, and the chassis 3 is also called the base. Generally, the chassis 3 includes traveling mechanisms such as longitudinal movement mechanism and transverse movement mechanism. An inclined support frame 13 for drilling jet grouting and mixing pile planting is installed on the chassis 3. The inclined support frame 13 is also called a mast or a guide frame, and is also called an inclined support column. There is an angle adjusting oil cylinder 9 of the inclined support frame 13 or a slope adjusting oil cylinder on the chassis 3 and the inclined support frame 13. There is a power head 11 and a pile pressing cap 10 on the inclined support frame 13. The pile pressing cap 10 can also be called a fixture for clamping the core pile or steel support. There is an oil cylinder for connecting or disassembling the drill pipe 30 on the inclined support frame 13. For example, two oil cylinders are used to control the distance between the power head 11 and the pile pressing cap 10 to facilitate the operation of disassembling or connecting the drill pipe 30 below. For example, when disassembling the drill pipe 30, pull out the pin between the two drill pipes 30, and then use the two oil cylinders to lift the upper drill pipe 30 upward, and the two drill pipes 30 will be disengaged. The reverse operation can be performed for connecting the drill pipe 30. There is a driving mechanism on the chassis 3 and the inclined support frame 13 for driving the power head 11 and the pile pressing cap 10 to move linearly along the inclined support frame 13. For example, there are two sets of driving mechanisms on the chassis 3 and the inclined support frame 13 for driving the power head 11 and the pile pressing cap 10 to move linearly along the inclined support frame 13, which are composed of a winch, a steel wire rope and a pulley block. One set pays out and the other set takes in, driving the power head 11 to drill down with the drill pipe 30 and the drill bit 5, and the pile pressing cap 10 presses the core pile and the steel support down, or one set takes in and the other set pays out, driving the power head 11 to reset or return with the drill pipe 30, the drill bit 5 and the pile pressing cap 10. A cement slurry conveying pipe 35 or a high-pressure cement slurry conveying pipe 35 communicating with the cement slurry source and the pump is installed in the drill pipe 30 and on the drill bit 5. There is a slurry spraying port 37 on the drill bit 5. When the drill bit 5 drills down, the slurry spraying port 37 sprays high-pressure cement slurry simultaneously with the propulsion of the core pile and the steel support. The cement slurry source such as a cement slurry tank is arranged on the ground surface 2, and the feed port of the high-pressure delivery pump communicates with the cement slurry tank. The above-mentioned high pressure, such as the pressure of the slurry conveying pipe 35 and the pressure of the slurry spraying port 37, is 20 - 35 MPa. The slurry spraying port 37 is also called a spray port or a spray head. An electronic gyroscope for monitoring and displaying the included angle between the inclined support frame 13 and the horizontal line can also be provided on the inclined support frame 13. A crane 1 can also be installed on the chassis 3. A control room 42 for drilling and pile planting can also be provided on the chassis 3. The inclined drilling jet grouting and mixing pile planting equipment of the present invention is generally placed on the ground surface 2 of the foundation pit to be excavated during construction. The ground surface 2 can also be called the ground. It is not difficult to understand that during the actual construction process, the part above the foundation pit bottom is also drilled and stirred while jet grouting the cement-soil jet grouting and mixing pile. However, after excavating to the foundation pit bottom, the cement-soil jet grouting and mixing pile above the foundation pit bottom is knocked off, and only the steel support remains above the foundation pit bottom. The above is the prior art.

[0033] The inventive point of the inclined drilling jet grouting and mixing pile planting equipment of the present invention lies in.

[0034] Such as Figure 9 、 Figure 11 、 Figure 12as shown in Fig. 13 and Fig. 14.

[0035] There is at least one concentric positioning frame 28 in the core pile to make the drill pipe 30 concentric with the core pile. The concentric positioning frame 28 can also be called the drill pipe positioning and guiding frame.

[0036] The cross-sectional shape of the concentric positioning frame 28 is the same as that of the inner hole of the core pile. The concentric positioning frame 28 is in clearance fit with the inner hole of the core pile, and the circular central hole 32 of the concentric positioning frame 28 is in clearance fit with the outer circumference of the drill pipe 30.

[0037] The outer shape of the concentric positioning frame 28 matching the square hole 25 of the steel lattice column core pile 8 is a square frame 33. There are axial limiting structures at both ends of the square frame 33 and the drill pipe 30, such as the axial limiting rings 29 located at both ends of the square frame 33 and welded to the drill pipe 30. There is a drill pipe sleeve 31 at the center of each end of the square frame 33. The axis of the circular central hole 32 of the drill pipe sleeve 31 is on the same straight line as the center connection line of the square frame 33, which can also be understood as being coaxial. The drill pipe 30 enters and exits the square hole 25 of the steel lattice column core pile 8, driving the concentric positioning frame 28 to axially slide in the square hole 25 of the steel lattice column core pile 8. After the construction of a steel lattice column core pile 8 with an inclined support and the steel support of the steel lattice column at its top is completed, the concentric positioning frame 28 is brought back to the ground surface 2 by the drill pipe 30 when the drill pipe is reset for reuse.

[0038] The outer shape of the concentric positioning frame matching the circular steel pipe pile core pile or the reinforced concrete precast pipe pile core pile with a circular hole or the steel support of the steel pipe pile is a circular frame. There are axial limiting structures at both ends of the circular frame and the drill pipe, such as the axial limiting rings located at both ends of the circular frame and welded to the drill pipe. There is a drill pipe sleeve at the center of each end of the circular frame. The axis of the circular central hole of the drill pipe sleeve is on the same straight line as the center connection line of the circular frame, which can also be understood as being coaxial. The drill pipe enters and exits the circular hole, driving the concentric positioning frame to axially slide in the circular hole of the steel pipe pile core pile or the reinforced concrete precast pipe pile core pile with a circular hole or the steel support made of the steel pipe pile. After the construction of a circular steel pipe pile core pile or a reinforced concrete precast pipe pile core pile with a circular hole or the steel support of the steel pipe pile with an inclined support is completed, the concentric positioning frame is brought back to the ground surface 2 by the drill pipe when the drill pipe is reset for reuse (not shown in the structure diagram of this paragraph).

[0039] There can be multiple concentric positioning frames 28 in the axial length of the core pile. One concentric positioning frame 28 is located at the inner bottom end of the core pile. It can be understood that if there is only one concentric positioning frame 28, it is set at the inner bottom end of the core pile. If there are multiple concentric positioning frames 28, at least one of them is set at the inner bottom end of the core pile such as the steel lattice column core pile 8, the steel pipe pile core pile or the reinforced concrete precast pipe pile core pile 14. The concentric positioning frame 28 can also be set in the hole of the steel pipe pile steel support or the steel lattice column steel support.

[0040] It is not difficult to understand that the clearance fit described above is a very standard term. The clearance fit between the concentric positioning frame 28 and the inner hole of the core pile means the sliding fit between the concentric positioning frame 28 and the core pile. For example, the opposite side dimension of the square hole 25 of the steel lattice column core pile 8 is greater than or equal to the opposite side dimension of the square frame 33 of the square concentric positioning frame 28, and the diameter of the central hole of the reinforced concrete precast pipe pile core pile 14 or the steel pipe pile is greater than or equal to the outer diameter dimension of the circular concentric positioning frame. The clearance fit between the circular central hole 32 of the concentric positioning frame 28 and the outer circumference of the drill pipe 30 means the sliding fit between the circular central hole 32 of the concentric positioning frame 28 and the drill pipe 30, and the aperture diameter of the circular central hole 32 of the concentric positioning frame 28 is greater than or equal to the outer diameter dimension of the drill pipe 30. Concentricity can also be understood as coaxiality.

[0041] The stirring blades 17 of the drill bit 5 at the bottom end of the drill pipe 30 are multiple pieces hinged on the drill bit 5. As the drill pipe 30 descends, the multiple stirring blades 17 are in an upward-opening state when encountering the soil mass for drilling. As the drill pipe 30 ascends, the multiple stirring blades 17 fold downwards, and the outer diameter of the drill bit 5 is smaller than the aperture diameter of the core pile central hole to facilitate the reset of the drill pipe 30.

[0042] In other words, the stirring blades 17 of the drill bit 5 are multiple pieces, and the multiple stirring blades 17 and the drill bit 5 are in an obliquely hinged state where when the drill bit descends and encounters the soil mass, it opens upward for drilling, and when the drill bit ascends and encounters the inner hole of the core pile, it folds up and passes through the inner hole.

[0043] The two slurry spraying nozzles 37 are symmetrically arranged at the ends of the two slurry conveying pipes 35 at the drill bit 5 with respect to the axis of the drill bit 5. There is a limiting structure on the stirring blades 17 and the drill bit 5 such that when the stirring blades 17 are opened, the same straight line of the two stirring blades 17 is perpendicular to the axis of the drill bit 5 by 90°. It can also be understood that there is a limiting structure on the drill bit 5 and the stirring blades 17 that restricts the opening amplitude of multiple stirring blades 17. For the said limiting structure, for example, when the stirring blade 17 is in the open state, there is a limiting plane on the top surface, and there is a limiting plane on the hinge seat of the drill bit 5, and the two limiting planes 40 abut against each other for limiting. The multiple stirring blades 17 are preferably four stirring blades 17. Every two stirring blades 17 form a pair and are symmetrically arranged with respect to the axis of the drill bit 5. The width midlines of the two stirring blades 17 in the upper part of the drill bit 5 are on the same straight line, and the width midlines of the two stirring blades 17 in the lower part of the drill bit 5 are also on the same straight line. The straight line of the two upper stirring blades 17 and the straight line of the two lower stirring blades 17 are perpendicular to each other's projection lines by 90°. The width midline is also called the width bisector. The hinge structure of each stirring blade 17 is that a hinge seat is fixed on the drill bit 5. The hinge seat has a pair, that is, two first ear plates 41 with hinge holes. An obliquely hinged plate 38 with a hinge hole is in clearance fit in the slot formed by a pair of first ear plates 41 and is hinged by a first hinge shaft 34. In the open state, each stirring blade is composed of an obliquely hinged plate 38 and an obliquely stirring plate 39 formed by twisting a whole plate by 90°. At the bottom end of the drill bit 5, an arrow-shaped stirring piece 37 with a wide top and a pointed bottom is fixed, such as by welding. The arrow-shaped stirring piece 37 can also be called an arrow-shaped stirring blade. It is not difficult to understand that since the opening amplitude of each stirring blade 17 is equal each time, the aperture of the formed hole body 4 is always determined. For example, it can be preset that the size of the tubular slide rail 7 matches the aperture of the formed hole body 4, that is, the tubular slide rail 7 just supports on the lower half hole wall 6 of the formed hole body 4, so that the tubular slide rail 7 is just located on the boundary line between the original soil layer and the cement slurry mixing body of the formed hole body 4, that is, the tubular slide rail 7 always slides straight down along the lower half hole wall 6. The formed hole body 4 can also be called the drilled hole, or the hole drilled.

[0044] The closing of the said stirring blades 17 is also called retraction. The opening amplitude of the stirring blades 17 can also be called the opening radian.

[0045] As Figure 1 、 Figure 5 As shown, at the bottom of the middle section of the diagonal support frame 13, a tubular slide rail sleeve 12 is fixed. A tubular slide rail 7, such as a rectangular tube slide rail, is in sliding fit in the tubular slide rail sleeve 12, such as a rectangular tube slide rail sleeve. A driving oil cylinder 19 is sleeved in the tubular slide rail 7 and the tubular slide rail sleeve 12 and extends upward out of the tubular slide rail sleeve 12. The tail end of the driving oil cylinder 19 is hinged on the diagonal support frame 13. The free end of the piston rod 18 of the driving oil cylinder 19 is hinged to a trough-shaped bracket 20 that opens upward and is used to support the core pile. The trough-shaped bracket 20 is fixed, such as by welding, to the bottom end of the tubular slide rail 7.

[0046] The tubular slide rail 7 is also called a tubular guide rail, and the tubular slide rail sleeve 12 is also called a tubular guide rail sleeve. Of course, the tubular slide rail 7 can also be a circular tube slide rail, and the tubular slide rail sleeve 12 can also be a circular tube slide rail sleeve.

[0047] See Figure 9 , on the diagonal brace 13, a hinge seat with a pair of second ear plates 24 is fixedly attached, such as by welding. The connecting block at the tail end of the driving oil cylinder 19 is movably inserted into the slot formed by the two second ear plates 24. A second hinge shaft 23 is inserted into the hinge holes on the second ear plates 24 and the connecting block, and is axially limited for hinging.

[0048] See Figure 8 , the trough-shaped bracket 20 may include a U-shaped trough with an upward opening for supporting the core pile. On the trough-shaped bracket 20, a hinge seat with a pair of third ear plates 21 is fixedly attached, such as by welding. The connecting block at the free end of the piston rod 18 is movably inserted into the slot formed by the two third ear plates 21. A third hinge shaft 22 is inserted into the hinge holes on the third ear plates 21 and the connecting block, and is axially limited for hinging.

[0049] The trough-shaped bracket 20 includes two side plates 44 that are welded to both sides of the lower end of the tubular slide rail 7, such as both sides of a rectangular tube slide rail, through respective connecting plates 43 and are used to limit the left-right swing of the core pile, multiple inclined cushion blocks 45 that are welded to the top surface of the lower end of the tubular slide rail 7, such as the top plate of a rectangular slide rail, and are used to support the core pile, and a bottom end plate 46 that is fixedly attached to the bottom end surface of the tubular slide rail 7, such as by using multiple screws for screwing.

[0050] The bottom end of the core pile has a tapered structure that is larger at the top and smaller at the bottom for sinking into the soil. The diameter of the central hole of the tapered structure is larger than the outer diameter of the drill bit 5 after the multiple hinged mixing blades 17 are folded up to facilitate the reset or return of the drill pipe 30.

[0051] Such as Figure 10 As shown, the tapered structure may include a circular steel cylinder 26 located in the central hole, i.e., the square hole 25, at the bottom end of the core pile of the steel lattice column 8. Multiple wing pieces 27 with a wide top and a pointed bottom are fixed on the outer circumference of the circular steel cylinder 26. The multiple wing pieces 27 are all fixedly attached to the bottom end of the steel lattice column 8, such as by welding. The inner diameter of the circular steel cylinder 26 is larger than the outer diameter of the drill bit 5 after the multiple hinged mixing blades 17 are folded up.

[0052] Such as Figure 3 As shown, the tapered structure can be an upper-large-lower-small conical steel sleeve 16 fixed at the bottom end of the core pile of a reinforced concrete precast pipe pile 14 or a steel pipe pile core pile. The aperture at the lower end of the conical steel sleeve 16 is larger than the outer diameter of the drill bit 5 after the multiple hinged mixing blades 17 are folded up. The conical steel sleeve 16 can be welded to the steel ring 15 at the bottom end of the core pile of the reinforced concrete precast pipe pile 14. The conical steel sleeve 16 can also be welded to the bottom end of the steel pipe pile core pile.

[0053] It is not difficult to understand that both the core pile and the steel support can be made of steel lattice columns 8, or both can be made of steel pipe piles, but they can also be asFigure 2 The core pile shown is a precast reinforced concrete pipe pile core pile 14, and the steel support is a steel lattice column. It is also possible to use a steel pipe pile as the core pile and a steel lattice column as the steel support. The conical structure is also called a pile tip or a pile shoe. It is not difficult to understand that the conical structure is buried underground together with the core pile. The conical structure can be regarded as a component of the inclined drilling jet grouting and mixing pile planting equipment of the present invention, and of course it can also be understood as an auxiliary device of the inclined drilling jet grouting and mixing pile planting equipment of the present invention. It is not difficult to understand that the outer shape of the precast reinforced concrete pipe pile core pile 14 can be circular or square, but the central hole is generally circular, and the concentric positioning frame can be circular to match the circular hole.

[0054] It is not difficult to understand that the components described in the present invention are all made of steel.

[0055] The components, structures or quantities not marked above are not shown in the drawings. The drawings are only schematic. If there are any inconsistencies between the drawings and the text description, the text description shall prevail.

[0056] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An inclined drilling jet grouting and mixing pile planting equipment, comprising a chassis, on which an inclined support frame for drilling jet grouting and mixing pile planting is installed. There is an inclined support frame angle adjustment oil cylinder between the chassis and the inclined support frame. A power head and a pile pressing cap are arranged on the inclined support frame. A driving mechanism for driving the power head and the pile pressing cap to linearly move along the inclined support frame is arranged on the chassis and the inclined support frame. A cement slurry conveying pipe communicating with a cement slurry source and a pump is installed in the drill pipe and on the drill bit. It is characterized in that: Two slurry injection ports are symmetrically arranged at the ends of two conveying pipes at the drill bit relative to the axis of the drill bit; There is at least one concentric positioning frame in the core pile to make the drill pipe concentric with the core pile; A arrow-shaped mixing blade with a wide upper part and a pointed lower part is fixed at the bottom end of the drill bit; The bottom end of the core pile has a conical structure with a large upper part and a small lower part for sinking into the soil body; A tubular slide rail sleeve is fixed at the bottom of the middle section of the inclined support frame. A tubular slide rail is slidably fitted in the tubular slide rail sleeve. A driving oil cylinder is sleeved in the tubular slide rail and the tubular slide rail sleeve and extends upward out of the tubular slide rail sleeve. The tail end of the driving oil cylinder is hinged on the inclined support frame. The free end of the piston rod of the driving oil cylinder is hinged with a trough-shaped bracket opening upward and used for supporting the core pile. The trough-shaped bracket is fixed with the bottom end of the tubular slide rail; The cross-sectional shape of the concentric positioning frame is the same as the cross-sectional shape of the inner hole of the core pile. The concentric positioning frame is in clearance fit with the inner hole of the core pile. The circular central hole of the concentric positioning frame is in clearance fit with the outer circumference of the drill pipe.

2. An inclined drilling jet grouting and mixing pile planting equipment according to claim 1, It is characterized in that: One concentric positioning frame is located at the bottom end inside the core pile.

3. An inclined drilling jet grouting and mixing pile planting equipment according to claim 1, It is characterized in that: The conical structure includes a circular steel cylinder in the central hole at the bottom end of the steel lattice column core pile. Multiple wing pieces with pointed bottoms and wide tops are fixed on the outer circumference of the circular steel cylinder. Multiple wing pieces are all fixed with the bottom end of the steel lattice column core pile. The inner diameter of the circular steel cylinder is larger than the outer diameter of the drill bit after multiple hinged mixing blades are folded up.

4. An inclined drilling jet grouting and mixing pile planting equipment according to claim 1, It is characterized in that: The conical structure is a conical steel sleeve with a large upper part and a small lower part fixed at the bottom end of the steel pipe pile core pile or the reinforced concrete precast pipe pile core pile. The aperture at the lower end of the conical steel sleeve is larger than the outer diameter of the drill bit after multiple hinged mixing blades are folded up.

5. An inclined drilling jet grouting and mixing pile planting equipment according to claim 1, It is characterized in that: The mixing blades of the drill bit at the bottom end of the drill pipe are multiple pieces hinged on the drill bit. When the drill pipe goes down, multiple mixing blades are in an upward opening state when encountering the soil body for drilling. When the drill pipe goes up, multiple mixing blades are folded down, and the outer diameter of the drill bit is smaller than the aperture of the central hole of the core pile to facilitate resetting.

6. An inclined drilling jet grouting and mixing pile planting equipment according to claim 5, It is characterized in that: The multiple stirring blades are four stirring blades. Every two stirring blades form a pair and are symmetrically arranged with respect to the axis of the drill bit. The width midlines of the two stirring blades at the upper part of the drill bit in the open state are on the same straight line, and the width midlines of the two stirring blades at the lower part of the drill bit in the open state are also on the same straight line. The perpendicular projection lines of the straight lines of the two upper stirring blades in the open state and the straight lines of the two lower stirring blades in the open state are 90° to each other; the hinge structure of each stirring blade is that a pair of ear plates with hinge holes are fixed on the drill bit. An obliquely hinged plate with a hinge hole is in clearance fit in a slot formed by a pair of first ear plates and is hinged by a first hinge shaft. In the open state, each stirring blade is an obliquely hinged plate and an obliquely stirring plate formed by twisting an integral plate by 90°; there is a limiting structure on the stirring blade and the drill bit to make the same straight line of the two stirring blades and the axis of the drill bit form 90° with each other when the stirring blades are opened.

7. An inclined drilling jet grouting and stirring pile planting device according to claim 5, characterized in that: The diameter of the central hole of the conical structure is larger than the outer diameter of the drill bit after the multiple hinged stirring blades are retracted to facilitate the reset of the drill bit.

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