Multi-layer mutual-shearing stirring drilling machine capable of transversely stretching and reducing and construction method of multi-layer mutual-shearing stirring drilling machine
By designing a multi-layer inter-sliding mixing drill with transverse telescopic diameter variation in the treatment of weak foundations, the cross-distributed stirring wing assembly is used to achieve bidirectional rotation stirring and change diameter, which solves the problems of uneven stirring and poor pile bearing capacity, and reduces the Material consumption and construction time have improved construction quality.
Patent Information
- Application Number
- CN202411204988.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-29
- Publication Date
- 2024-12-10
AI Technical Summary
In weak foundation treatment projects, the existing mixing pile construction equipment has problems such as uneven mixing and poor pile bearing capacity, which leads to waste of curing agents and increased costs, and lacks effective solutions.
A multi-layer inter-slicing and changing diameter multi-layer inter-slicing drill rig is designed, using drill rod assembly and stirring wing assembly. Through the cross distribution and expansion function of the outer stir frame and the inner stirring wing, bidirectional rotating stirring and changing diameter are achieved to ensure the slurry. Even mixing with the soil and firmness of the pile body.
It achieves a more uniform stirring and a firmer pile body, reduces material consumption and construction time, improves construction quality, and avoids the problems of traditional pile expansion diameter control difficulties and the inability to fully open the variable diameter blades.
Smart Images
Figure CN119102214A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of multi-layer mutual shearing and mixing drilling rigs, and in particular relates to a multi-layer mutual shearing and mixing drilling rig capable of transversely extending and changing diameters and a construction method thereof. Background Art
[0002] With the rapid development of my country's economy, the scope of engineering construction has been continuously expanded, and the engineering geological conditions faced are becoming more and more complex. Especially in some soft foundation treatment projects with complex environments, the properties of the soil layer are often more complex, and the bearing capacity of small-diameter single piles is insufficient, posing a safety hazard, while the bearing capacity of large-diameter piles is excessive, resulting in a waste of curing agent and increased costs; and the mixing pile construction equipment currently on the market generally has problems such as uneven mixing and poor pile bearing capacity.
[0003] There is no effective and reasonable solution to the technical problems existing in the above-mentioned soft foundation treatment project; therefore, there is an urgent need to seek new technologies to solve the above-mentioned problems. Summary of the invention
[0004] The purpose of the present invention is to address the deficiencies in the above-mentioned technologies and to propose a multi-layer shear mixing drilling rig capable of transversely extending and changing diameters and a construction method thereof, so as to solve the problem of variable diameter pile foundations in soft foundations.
[0005] The present invention provides a multi-layer shear mixing drill capable of transversely extending and reducing diameter, the drill comprising a drill rod assembly and a drill tool assembly; the drill rod assembly comprises a drill rod, the drill rod comprising an outer drill rod and an inner drill rod, the outer drill rod being sleeved outside the inner drill rod, and the outer drill rod and the inner drill rod being capable of independently rotating around the same axis; the drill tool assembly comprises an outer stirring frame and a stirring wing assembly; the first end of the outer stirring frame is connected to the outer drill rod, the second end of the stirring frame is connected to the inner drill rod and is capable of rotating around the inner drill rod (32), and the outer stirring frame is capable of extending and retracting in the radial direction of the drill rod; the outer stirring frame rotates together with the outer drill rod; the stirring wing assembly is fixedly arranged on the outer stirring frame and the inner drill rod respectively, and the stirring wings on the stirring wing assembly are capable of extending and retracting in the radial direction of the drill rod; wherein the stirring wing assembly comprises an inner stirring wing assembly and an outer stirring wing assembly, the inner stirring wing assembly is provided in plurality and arranged on the inner drill rod at intervals up and down, the outer stirring wing assembly is provided in plurality and arranged on the inner side of the outer stirring frame at intervals up and down, and the inner stirring wing assembly and the outer stirring wing assembly are arranged oppositely and crosswise.
[0006] Furthermore, the first end of the outer stirring frame is connected to the outer drill rod through a first telescopic arm, and the second end of the stirring frame is connected to the casing through a second telescopic arm; the first telescopic arm and the second telescopic arm can be telescoped along the radial direction of the drill rod; the casing is sleeved on the inner drill rod, and the inner drill rod can rotate in the casing.
[0007] Furthermore, the inner stirring wing assembly includes a telescopic assembly, a stirring wing and a mounting seat; the mounting seat of the inner stirring wing assembly is detachably connected to the inner drill rod by fixing screws; the telescopic assembly of the inner stirring wing assembly is arranged in the mounting seat of the inner stirring wing assembly, the stirring wing of the inner stirring wing assembly is connected to the telescopic assembly of the inner stirring wing assembly, and the telescopic assembly of the inner stirring wing assembly is used to drive the stirring wing of the inner stirring wing assembly to telescope along the radial direction of the inner drill rod; the outer stirring wing assembly includes a telescopic assembly, a stirring wing and a mounting seat; the mounting seat of the outer stirring wing assembly is detachably connected to the outer stirring frame by fixing screws; the telescopic assembly of the outer stirring wing assembly is arranged in the mounting seat of the outer stirring wing assembly, the stirring wing of the outer stirring wing assembly is connected to the telescopic assembly of the outer stirring wing assembly, and the telescopic assembly of the outer stirring wing assembly is used to drive the stirring wing of the outer stirring wing assembly to telescope along the radial direction of the inner drill rod.
[0008] Furthermore, the telescopic assembly includes a motor and a screw; the motor is sealed in the mounting seat, the output end of the motor is transmission connected to one end of the screw through a serrated belt, and can drive the screw to rotate through the serrated belt; the other end of the screw is also transmission connected to the threaded hole on the stirring wing, and can be telescopically moved by driving the stirring wing; a ball bearing is also provided on the stirring wing, and the ball bearing can move with the stirring wing; one end of the screw passes through the ball bearing and is movably matched with the ball bearing.
[0009] Further, the first telescopic arm includes a first guide cylinder, a first telescopic cylinder and a first spring; The first end of the first guide cylinder is fixedly connected to the outer drill rod (31); the first end of the first guide cylinder is a closed end, a first fluid inlet is provided at the closed end, and the first fluid inlet is connected to the fluid delivery pipeline in the outer drill rod (31); the second end of the first guide cylinder is an open end; The first end of the first telescopic cylinder is an open end, and the second end is a closed end. The first end of the first telescopic cylinder is inserted into the first guide cylinder from the second end of the first guide cylinder, and the second end of the first telescopic cylinder is fixedly connected to the first end of the outer stirring frame (5); The first spring is arranged in the first guide cylinder, the first end of the first spring is fixedly connected to the first end of the first guide cylinder, and the second end of the first spring is fixedly connected to the second end of the first telescopic cylinder; The second telescopic arm comprises a second guide cylinder, a second telescopic cylinder and a second spring; The first end of the second guide cylinder is fixedly connected to the outer stirring frame (5); the first end of the second guide cylinder is a closed end, a second fluid inlet is provided at the closed end, the second fluid inlet is connected to the fluid delivery pipeline in the outer stirring frame (5); the fluid delivery pipeline in the outer stirring frame (5) is connected to the fluid delivery pipeline in the outer drill rod (31); the second end of the second guide cylinder is an open end; The first end of the second telescopic cylinder is an open end, and the second end is a closed end. The first end of the second telescopic cylinder is inserted into the second guide cylinder from the second end of the second guide cylinder, and the second end of the second telescopic cylinder is fixedly connected to the sleeve (33); The second spring is arranged in the second guide cylinder, the first end of the second spring is fixedly connected to the first end of the second guide cylinder, and the second end of the second spring is fixedly connected to the second end of the second telescopic cylinder.
[0010] Furthermore, the mixing drill rig also includes a drill rig frame and a power unit, the drill rig frame is set on the ground, and the power unit is set on the drill rig frame in a vertical direction; the drill rig frame is connected to the power unit through a wire rope; the outer drill rod and the inner drill rod are respectively hollow structures; the outer drill rod and the inner drill rod are coaxially arranged and can rotate relative to each other; the upper end of the outer drill rod is connected to the lower power head assembly of the power unit, and the upper end of the inner drill rod is connected to the upper power head assembly of the power unit; the rotation schemes of the outer drill rod and the inner drill rod are opposite, so that the stirring wings on the outer mixing frame and the stirring wings on the inner drill rod can achieve bidirectional rotation and mixing.
[0011] Furthermore, the outer drill rod and the outer stirring frame are respectively provided with a wire groove, the wire groove on the outer drill rod is connected with the wire groove on the outer stirring frame, and a disc pay-off rack is provided at the junction of the wire groove on the outer drill rod and the wire groove on the outer stirring frame; the wire in the wire groove of the outer drill rod bypasses the disc pay-off rack, and is electrically connected to the motors of the telescopic components on each outer stirring frame through the wire groove on the outer stirring frame; the inner drill rod is provided with a wire groove, and the wire in the wire groove of the inner drill rod is electrically connected to the motors of the telescopic components on each inner drill rod.
[0012] Furthermore, the external stirring frame is a concave structure; the external stirring frame includes multiple external stirring frames, which are evenly distributed along the circumference of the drill rod; a plurality of external stirring wing assemblies are evenly spaced along the vertical direction on the inner wall of each external stirring frame, and a plurality of internal stirring wing assemblies are evenly spaced along the vertical direction on the outer wall of the inner drill rod; an internal stirring wing assembly is staggered between two adjacent external stirring wing assemblies, thereby realizing multi-layer bidirectional mutual shear stirring.
[0013] Accordingly, the present invention also provides a construction method of a transversely retractable multi-layer shearing mixing drill, using the above-mentioned mixing drill; the construction method includes the following process: S1: After the construction site is leveled, assemble the mixing drill, move the mixing drill to the construction site, and prepare the backstage equipment; S2: Start the mixing drill, and according to the preset construction parameters, control the power unit through the operation control module of the mixing drill, apply clockwise and counterclockwise torque and vertical drilling pressure to the upper power head assembly and the lower power head assembly respectively, and perform bidirectional mixing pile drilling and mixing construction; at the same time, during the drilling and mixing process, according to the design requirements, start the diameter change construction of the mixing wings on the outer mixing frame and the inner drill rod through the diameter change button on the cockpit control panel of the mixing drill in the designated pile section; S3: When the bidirectional mixing pile reaches the designed depth, the operation control module of the mixing drill controls the power unit according to the preset construction parameters, applies clockwise and counterclockwise torque and lifting force to the upper power head assembly and the lower power head assembly respectively, and performs secondary multi-layer bidirectional mutual shear mixing of the bidirectional mixing pile in the upward stage of the mixing drill; S4: Repeat the construction operations of steps S2 to S3 according to the design requirements of the length, diameter and shape of the bidirectional mixing pile; S5: Finish the construction of the variable-diameter bidirectional mixing pile, transfer the mixing drill to the next pile position, and repeat the above construction steps.
[0014] Further, in step S2: starting the diameter-changing construction of the stirring wings on the outer stirring frame and the inner drill rod includes: S21: the outer mixing frame is expanded along the radial direction of the drill rod through the telescopic assembly and the drill rod; S22: The stirring wings on the outer stirring frame are spread out toward one side of the drill pipe through the telescopic assembly; S23: The stirring wings on the inner drill rod are extended toward one side of the outer stirring frame through the telescopic assembly; The stirring wings on the outer stirring frame and the stirring wings on the inner drill rod are arranged alternately with each other; The construction of the mixing blade diameter change can be started once or multiple times.
[0015] Furthermore, in step S3: during the drilling and mixing process, according to the shape design requirements of the bidirectional mixing pile, the mixing wing diameter changing construction operation is not started, or is started once or multiple times, until the mixing drill is lifted out of the ground to form a "multi-section" or any shape of variable diameter bidirectional mixing pile.
[0016] The solution provided by the present invention comprises a mixing drill assembly and a drill bit assembly; the drill rod assembly comprises a drill rod, the drill rod comprises an outer drill rod and an inner drill rod, the outer drill rod is sleeved on the inner drill rod, and the outer drill rod and the inner drill rod can rotate independently around the same axis; the drill bit assembly comprises an outer mixing frame and a mixing wing assembly; the first end of the outer mixing frame is connected to the outer drill rod, the second end of the mixing frame is connected to the inner drill rod and can rotate around the inner drill rod (32), and the outer mixing frame can be extended and retracted along the radial direction of the drill rod to facilitate the formation of a variable diameter pile; the outer mixing frame rotates with the outer drill rod; the mixing wing assembly They are respectively fixed on the outer stirring frame and the inner drill rod, and the stirring wings on the stirring wing assembly can be extended and retracted along the radial direction of the drill rod; wherein, the stirring wing assembly includes an inner stirring wing assembly and an outer stirring wing assembly, the inner stirring wing assembly has a plurality of them, which are arranged on the inner drill rod at intervals up and down, and the outer stirring wing assembly has a plurality of them, which are arranged on the inner side of the outer stirring frame at intervals up and down, and the inner stirring wing assembly and the outer stirring wing assembly are arranged oppositely and crosswise, so as to facilitate the two-way shearing of the slurry and the soil when forming the variable diameter pile, so that the two are mixed more evenly and the formed pile body is more solid. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0018] The present invention will be further described below in conjunction with the accompanying drawings: Figure 1 This is a schematic diagram of the overall structure of a drilling rig according to the present invention; Figure 2 It is a schematic diagram of a closed state of a multi-layer shearing and stirring drill tool capable of transversely extending and reducing diameter according to the present invention; Figure 3 It is a schematic diagram of an open state of a multi-layer shearing and stirring drilling tool capable of transversely extending and changing diameters according to the present invention; Figure 4 This is a schematic diagram of a first embodiment of the telescopic assembly structure of the present invention; Figure 5 A schematic diagram of a drilling rig working state according to the present invention; Figure 6 This is a second schematic diagram of a drilling rig working state according to the present invention; Figure 7 It is a schematic diagram of the working state of a drilling rig of the present invention; Figure 8 It is a schematic diagram of the working state of a drilling rig according to the present invention; Fig. 9 A fifth schematic diagram of a drilling rig working state according to the present invention; Fig.10 Schematic diagram of the working state of a drilling rig according to the present invention.
[0019] In the figure: 1. drilling rig frame; 11. wire rope; 2. power unit; 3. drill rod assembly; 31. outer drill rod; 32. inner drill rod; 33. casing; 4. drill bit assembly; 5. outer stirring frame; 51. wire trough; 6. telescopic assembly; 7. inner stirring wing assembly; 8. outer stirring wing assembly; 9. disc pay-off stand; 10. motor; 20. serrated belt; 30. screw rod; 50. stirring wing; 60. mounting base; 70. fixing screw; 80. rock formation. DETAILED DESCRIPTION
[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0021] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.
[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. The meaning of "several" is one or more, unless otherwise clearly and specifically defined.
[0023] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "front", "back", "left", "right", etc. are based on the directions 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.
[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0025] As shown in Figure 1 to Fig.10 As shown, the present invention provides a transversely retractable multi-layer shear mixing drill, the mixing drill comprising a drill frame 1, a power unit 2, a drill rod assembly 3 and a drill bit assembly 4; the power unit 2 is arranged on the drill frame 1, and is used to provide power to the drill rod assembly 3; further, the drill rod assembly 3 comprises a drill rod, the drill rod comprises an outer drill rod 31 and an inner drill rod 32, the outer drill rod 31 is sleeved outside the inner drill rod 32, and the outer drill rod 31 and the inner drill rod 32 can rotate independently around the same axis, that is, the outer drill rod 31 and the inner drill rod 32 respectively rotate around the same axis; further, the drill bit assembly 4 includes a drill bit, an outer stirring frame 5 and a stirring wing assembly; specifically, the drill bit is installed at the bottom end of the inner drill rod 32, and a grouting hole is provided on the drill bit, and the slurry can be sprayed out from the grouting hole on the drill bit through the inner drill rod 32; the first end of the outer stirring frame 5 is connected to the outer drill rod 31, the second end of the stirring frame 5 is movably connected to the inner drill rod 32 and can rotate around the inner drill rod (32), and the outer stirring frame 5 can be extended and retracted along the radial direction of the drill rod ( that is, it can be extended and retracted laterally); further, the outer stirring frame 5 rotates with the outer drill rod 31; further, the stirring wing assembly includes an inner stirring wing assembly 7 and an outer stirring wing assembly 8, the inner stirring wing assembly 7 has a plurality of them, which are arranged on the inner drill rod 32 at intervals, and the outer stirring wing assembly 8 has a plurality of them, which are arranged on the inner side of the outer stirring frame 5 at intervals, and the inner stirring wing assembly 7 and the outer stirring wing assembly (8) are arranged oppositely and crosswise to form a layered distribution structure, which is convenient for multi-layer bidirectional mutual shearing of the slurry and the soil layer, so as to achieve uniform mixing of the slurry and the soil layer; further, the stirring wings on the stirring wing assembly can be extended and retracted along the radial direction of the drill rod to realize multi-layer mutual shearing with free variable diameter, so that there is no need to replace the drilling tool during pile driving construction, which can overcome the defect that the pile body diameter of conventional variable diameter piles cannot meet the design requirements, and the pile body diameter can be accurately controlled; the transversely retractable multi-layer mutual shearing stirring drilling rig provided by the present invention can open the stirring wings (stirring blades) by mechanical transmission, effectively solving the problem of variable diameter pile driving in existing soft foundation.
[0026] Specifically, the solution provided by the present invention is that the mixing drill comprises a drill rod assembly and a drill bit assembly; the drill rod assembly comprises a drill rod, the drill rod comprises an outer drill rod and an inner drill rod, the outer drill rod is sleeved on the inner drill rod, and the outer drill rod and the inner drill rod can rotate independently around the same axis; the drill bit assembly comprises an outer mixing frame and a mixing wing assembly; the first end of the outer mixing frame is connected to the outer drill rod, the second end of the mixing frame is connected to the inner drill rod and can rotate around the inner drill rod (32), and the outer mixing frame can be extended and retracted along the radial direction of the drill rod to facilitate the formation of variable diameter piles; the outer mixing frame rotates together with the outer drill rod; the mixing wing The components are fixedly arranged on the outer stirring frame and the inner drill rod respectively, and the stirring wings on the stirring wing assembly can be extended and retracted along the radial direction of the drill rod; wherein, the stirring wing assembly includes an inner stirring wing assembly and an outer stirring wing assembly, the inner stirring wing assembly has a plurality of them, which are arranged on the inner drill rod at intervals up and down, and the outer stirring wing assembly has a plurality of them, which are arranged on the inner side of the outer stirring frame at intervals up and down, and the inner stirring wing assembly and the outer stirring wing assembly are arranged oppositely and crosswise, so as to facilitate the two-way shearing of the slurry and the soil when forming the variable diameter pile, so that the two are mixed more evenly and the formed pile body is more solid.
[0027] Preferably, in combination with the above scheme, as shown in Figures 1 to Fig.10 As shown, in this embodiment: the first end of the outer stirring frame 5 is connected to the outer drill rod 31 through the first telescopic arm 6a, and the second end of the stirring frame 5 is connected to the casing 33 through the second telescopic arm 6b; further, the first telescopic arm 6a and the second telescopic arm 6b can be telescoped along the radial direction of the drill rod, thereby pushing the outer stirring frame 5 to telescope; further, the casing 33 is sleeved on the inner drill rod 32, and the inner drill rod 32 can rotate in the casing 33.
[0028] Preferably, in combination with the above scheme, as shown in Figures 1 to Fig.10 As shown, in this embodiment: the inner stirring wing assembly 7 includes a telescopic assembly, a stirring wing 50 and a mounting seat 60; specifically, the mounting seat 60 of the inner stirring wing assembly 7 is detachably connected to the inner drill rod 32 by a fixing screw 70; the telescopic assembly of the inner stirring wing assembly 7 is arranged in the mounting seat 60 of the inner stirring wing assembly 7, and the stirring wing 50 of the inner stirring wing assembly 7 is connected to the telescopic assembly of the inner stirring wing assembly 7, and the telescopic assembly of the inner stirring wing assembly 7 is used to drive the stirring wing 50 of the inner stirring wing assembly 7 to telescope along the radial direction of the inner drill rod 32 ; Further, the outer stirring wing assembly 8 includes a telescopic assembly, a stirring wing 50 and a mounting base 60; specifically, the mounting base 60 of the outer stirring wing assembly 8 is detachably connected to the inner wall of the outer stirring frame 5 by a fixing screw 70; the telescopic assembly of the outer stirring wing assembly 8 is arranged in the mounting base 60 of the outer stirring wing assembly 8, and the stirring wing 50 of the outer stirring wing assembly 8 is connected to the telescopic assembly of the outer stirring wing assembly 8, and the telescopic assembly of the outer stirring wing assembly 8 is used to drive the stirring wing 50 of the outer stirring wing assembly 8 to telescope along the radial direction of the inner drill rod 32.
[0029] Preferably, in combination with the above scheme, as shown in Figures 1 to Fig.10 As shown, specific reference Figure 4 As shown, in this embodiment: the telescopic assembly includes a motor 10 and a screw rod 30; wherein the motor 10 is sealed and arranged in a mounting seat 60, and the output end of the motor 10 is transmission-connected to one end of the screw rod 30 through a sawtooth belt 20, and can drive the screw rod 30 to rotate through the sawtooth belt 20; further, the other end of the screw rod 30 is also transmission-connected to the threaded hole on the stirring wing 50, and can drive the stirring wing 50 to telescopically move; the stirring wing 50 is telescopically arranged in the mounting seat 60 along the radial direction of the inner drill rod 32, and the stirring wing 50 extends out of the mounting seat 60 It does not detach from the mounting seat 60 at the maximum stroke, which can prevent mud from affecting the screw rod and the motor; the mechanical transmission of the screw rod and the stirring wing adopts the cooperation of the screw rod and the threaded hole, and the stirring wing is driven to move back and forth by the rotation of the screw rod; further, a ball bearing is also provided on the stirring wing 50 at the position that cooperates with the mounting seat 60, and the ball bearing can move with the stirring wing 50 to facilitate the extension and retraction of the stirring wing 50. The ball bearing can also form a stable support for the stirring wing 50 to prevent the stirring wing 50 from swinging during the stirring process and damaging the screw rod.
[0030] Preferably, in some embodiments, the first telescopic arm includes a first guide cylinder, a first telescopic cylinder and a first spring; the first end of the first guide cylinder is fixedly connected to the outer drill rod 31, the first end of the first guide cylinder is a closed end, and a first fluid inlet is provided at the closed end, and the first fluid inlet is connected to the fluid delivery pipeline in the outer drill rod 31; the second end of the first guide cylinder is an open end; the first end of the first telescopic cylinder is an open end, and the second end is a closed end, the first end of the first telescopic cylinder is inserted into the first guide cylinder from the second end of the first guide cylinder, and the second end of the first telescopic cylinder is fixedly connected to the first end of the outer stirring frame 5; the first spring is provided in the first guide cylinder, the first end of the first spring is fixedly connected to the first end of the first guide cylinder, and the second end of the first spring is fixedly connected to the second end of the first telescopic cylinder.
[0031] The second telescopic arm includes a second guide cylinder, a second telescopic cylinder and a second spring; the first end of the second guide cylinder is fixedly connected to the outer stirring frame 5, the first end of the second guide cylinder is a closed end, and a second fluid inlet is provided at the closed end, and the second fluid inlet is connected to the fluid conveying pipeline in the outer stirring frame 5; the fluid conveying pipeline in the outer stirring frame 5 is connected to the fluid conveying pipeline in the outer drill rod 31; the second end of the second guide cylinder is an open end; the first end of the second telescopic cylinder is an open end, and the second end is a closed end, the first end of the second telescopic cylinder is inserted into the second guide cylinder from the second end of the second guide cylinder, and the second end of the second telescopic cylinder is fixedly connected to the casing 33; the second spring is arranged in the second guide cylinder, the first end of the second spring is fixedly connected to the first end of the second guide cylinder, and the second end of the second spring is fixedly connected to the second end of the second telescopic cylinder.
[0032] When the outer stirring frame 5 needs to be extended outward, pressurized fluid (such as water or slurry) is injected into the fluid conveying pipeline in the outer drill pipe 31 on the ground, and a part of the fluid enters the first guide cylinder from the first fluid inlet and pushes the first telescopic cylinder to extend outward; the other part of the fluid, after passing through the fluid conveying pipeline in the outer stirring frame 5, enters the second guide cylinder through the second fluid inlet and pushes the second telescopic cylinder to extend outward from the second guide cylinder.
[0033] Preferably, the first spring is a conical spring, the outer diameter of the first end of which is larger than the outer diameter of the second end. When part of the fluid enters the first guide cylinder from the first fluid inlet and pushes the first telescopic cylinder to extend outward, the pressurized fluid will also exert an extension force on the first spring, so that the first telescopic cylinder can overcome the smaller elastic resistance of the first spring under the action of the pressurized fluid and quickly extend from the first guide cylinder.
[0034] The second spring may also be a conical spring, the outer diameter of the first end of which is larger than the outer diameter of the second end. When part of the fluid enters the second guide cylinder from the second fluid inlet and pushes the second telescopic cylinder to extend outward, the pressurized fluid will also exert an extension force on the second spring, so that the second telescopic cylinder can overcome the smaller elastic resistance of the second spring under the action of the pressurized fluid and quickly extend from the second guide cylinder.
[0035] When the injection of pressurized fluid into the fluid delivery pipeline in the outer drill rod 31 is stopped on the ground, or even when negative pressure is applied to the fluid delivery pipeline in the outer drill rod 31 on the ground, the first spring pulls the first telescopic cylinder back into the first guide cylinder under the action of the elastic restoring force, and the second spring pulls the second telescopic cylinder back into the second guide cylinder under the action of the elastic restoring force, thereby reducing the outer diameter of the outer stirring frame 5.
[0036] In some embodiments, a first fluid overflow hole is provided at the second end of the first telescopic cylinder, and a second fluid overflow hole connected to the first fluid overflow hole is provided on the outer side wall of the outer stirring frame 5. When a part of the fluid enters the first guide cylinder from the first fluid inlet and pushes the first telescopic cylinder to extend outward, a part (a small amount) of the fluid overflows from the second fluid overflow hole through the first fluid overflow hole, so as to achieve the effect of pre-wetting and softening the soil outside the outer stirring frame 5.
[0037] Preferably, in combination with the above scheme, as shown in Figures 1 to Fig.10 As shown, in this embodiment: the mixing drill also includes a drill frame 1 and a power unit 2, wherein the drill frame 1 is set on the ground, and the power unit 2 is set on the drill frame 1 in a vertical direction; the drill frame 1 is connected to the power unit 2 through a wire rope 11, and can drive the power unit 2 to move up and down in the vertical direction; further, the outer drill rod 31 and the inner drill rod 32 are respectively hollow structures, and the outer drill rod 31 is sleeved on the outside of the inner drill rod 32; the outer drill rod 31 and the inner drill rod 32 are coaxially arranged and can rotate relatively; further, the upper end of the outer drill rod 31 is connected to the lower power head assembly of the power unit 2, and the upper end of the inner drill rod 32 is connected to the upper power head assembly of the power unit 2; specifically, during the diameter-changing construction process, the rotation schemes of the outer drill rod 31 and the inner drill rod 32 are opposite, so that the stirring wings on the outer stirring frame 5 and the stirring wings on the inner drill rod 32 can achieve two-way rotation and stirring; preferably, the outer drill rod 31 rotates in a clockwise direction and the inner drill rod 32 rotates in a counterclockwise direction.
[0038] Preferably, in combination with the above scheme, as shown in Figures 1 to Fig.10 As shown, in order to realize the electrical connection of the telescopic assembly, a wire groove 51 is respectively provided on the outer drill rod 31 and the outer stirring frame 5, the wire groove 51 on the outer drill rod 31 is connected with the wire groove 51 on the outer stirring frame 5, and a disc pay-off frame 9 is provided at the transition between the wire groove 51 on the outer drill rod 31 and the wire groove 51 on the outer stirring frame 5; further, the wire in the wire groove 51 of the outer drill rod 31 bypasses the disc pay-off frame 9, and is respectively connected to the motor 10 of the telescopic assembly 6 on each outer stirring frame 5 through the wire groove 51 on the outer stirring frame 5 Electrical connection; the disc pay-off frame 9 is used to realize the scaling of the wire; further, a wire groove 51 is provided on the inner drill rod 32, and the wires in the wire groove 51 of the inner drill rod 32 are respectively electrically connected to the motor 10 of the telescopic assembly 6 on each inner drill rod 32; in this embodiment: the telescopic assembly feeding system of the stirring wing mainly controls the rotation of the lead screw by the motor to realize the extension and contraction of the stirring wing, and the motor is powered by laying wires in the drill rod and the drill bit, and the wires laid in the drill rod and the drill bit can realize the scaling of the wires through the disc pay-off frame.
[0039] Preferably, in combination with the above scheme, as shown in Figures 1 to Fig.10As shown, in this embodiment: the stirring wing assembly includes an inner stirring wing assembly 7 and an outer stirring wing assembly 8; wherein, multiple groups of inner stirring wing assemblies 7 are arranged on the outer wall of the inner drill rod 32, and the stirring wings on the inner stirring wing assembly 7 can be extended and retracted along the radial direction of the inner drill rod 32; further, multiple groups of inner stirring wing assemblies 7 are arranged on the circumferential direction of the outer wall of the inner drill rod 32; further, multiple groups of outer stirring wing assemblies 8 are arranged on the inner side of the outer stirring frame 5, and form a gap with the multiple groups of inner stirring wing assemblies 7 in the vertical direction; further, the stirring wings on the outer stirring wing assembly 8 can be extended and retracted along the radial direction of the inner drill rod 32, thereby realizing variable diameter construction.
[0040] Preferably, in combination with the above scheme, as shown in Figures 1 to Fig.10 As shown, in this embodiment: the outer stirring frame 5 is a concave structure, and this design makes the outer stirring frame 5 convenient to connect to both ends of the drill rod; further, the outer stirring frame 5 includes multiple, multiple outer stirring frames 5 are evenly distributed along the circumference of the drill rod, and a plurality of groups of outer stirring wing assemblies 8 are evenly spaced along the vertical direction on the inner wall of each outer stirring frame 5, and a plurality of groups of inner stirring wing assemblies 7 are evenly spaced along the vertical direction on the outer wall of the inner drill rod 32; further, a group of inner stirring wing assemblies 7 are staggered between two adjacent groups of outer stirring wing assemblies 8, thereby realizing multi-layer bidirectional mutual shear stirring.
[0041] Preferably, in combination with the above scheme, as shown in Figures 1 to Fig.10 As shown, the stirring wings (also called stirring blades) on the inner drill rod 32 of the present application are completely fixed on an inner drill rod 32 and stir in one direction; the stirring wings (also called stirring blades) on the outer stirring frame 5 are completely fixed on an outer stirring frame 5 and stir in another direction. The inner drill rod 32 and the outer drill rod 31 rotate in opposite directions, so that the soil can be stirred more evenly; the stirring wings on the inner drill rod 32 and the stirring wings on the outer stirring frame 5 are multi-layer shear stirring tools, and the multi-layer shear stirring tools can be increased or reduced according to engineering requirements; further, the stirring wings on the inner drill rod 32 and the stirring wings on the outer stirring frame 5 are respectively designed to have a certain angle. When they are reversed with each other, the soil between the two stirring wings is in a state of shear force, which can make the soil stirred more evenly and also have the effect of compacting the soil to realize the mutual shear process.
[0042] Preferably, in combination with the above scheme, as shown in Figures 1 to Fig.10As shown, the present invention provides a multi-layer mutual shearing and mixing drilling rig, which specifically also includes a rotary jet variable diameter unit and a grouting unit; the bidirectional drill bit assembly 4 performs bidirectional mutual shearing and mixing under the driving action of the power unit 2, and the power unit 2 is suspended and connected to the drilling rig frame 1; the high-pressure rotary jet grouting channel of the rotary jet variable diameter unit is arranged in the inner drill rod, and the high-pressure rotary jet grouting port is arranged between the outer mixing frame of the bidirectional mutual shearing and mixing drill bit and the drilling blade, and the curing agent slurry is ejected from the high-pressure rotary jet grouting port through the high-pressure rotary jet grouting channel through the high-pressure rotary jet grouting faucet, and under the action of the power unit 2, multi-layer bidirectional mutual shearing and mixing and rotary high-pressure injection are realized to form an expanded diameter bidirectional mixing pile; the scheme provided by the present invention can accurately adjust the diameter variation of the pile through the high-pressure grouting pump, and can also realize variable diameter grouting in the designed pile section through construction parameter control.
[0043] The solution provided by the present invention combines the bidirectional mixing technology with the lateral mixing wing telescopic technology during the process of forming variable-diameter bidirectional mixing piles. When multi-layer bidirectional shear mixing is implemented mechanically, construction can be carried out synchronously according to the pile body position and pile body shape design. The mixing drill provided by the present invention has simple construction operation and saves time, ensuring that the construction quality of the variable-diameter bidirectional mixing piles is controllable and reliable.
[0044] Accordingly, in combination with the above scheme, as shown in Figures 1 to Fig.10 As shown, the present invention also provides a construction method of a transversely retractable multi-layer shearing mixing drill, using the above-mentioned mixing drill; specifically, the construction method includes the following process: S1: After the construction site is leveled, assemble the mixing drill, move the mixing drill to the construction site, and prepare the backstage equipment; S2: Start the mixing drill, and according to the preset construction parameters, control the power unit 2 through the operation control module of the mixing drill, apply clockwise and counterclockwise torque and vertical drilling pressure to the upper power head assembly and the lower power head assembly respectively, and perform bidirectional mixing pile drilling and mixing construction; at the same time, during the drilling and mixing process, according to the design requirements, the diameter change construction of the mixing wings on the outer mixing frame 5 and the inner drill rod 32 is started through the diameter change button on the cockpit control panel of the mixing drill in the designated pile section; S3: When the bidirectional mixing pile reaches the designed depth, the operation control module of the mixing drill controls the power unit 2 according to the preset construction parameters, applies clockwise and counterclockwise torque and lifting force to the upper power head assembly and the lower power head assembly respectively, and performs secondary multi-layer bidirectional mutual shear mixing of the bidirectional mixing pile in the upward stage of the mixing drill; S4: Repeat the construction operations of steps S2 to S3 according to the design requirements of the length, diameter and shape of the bidirectional mixing pile; S5: Finish the construction of the variable-diameter bidirectional mixing pile, transfer the mixing drill to the next pile position, and repeat the above construction steps.
[0045] Preferably, in combination with the above scheme, as shown in Figures 1 to Fig.10 As shown, in step S2: starting the diameter-changing construction of the stirring wings on the outer stirring frame 5 and the inner drill rod 32 includes: S21: the outer stirring frame 5 is expanded along the radial direction of the drill rod through the telescopic assembly and the drill rod; S22: The stirring wings on the outer stirring frame 5 are opened toward one side of the drill pipe through the telescopic assembly; S23: The stirring wings on the inner drill rod 32 are spread out toward one side of the outer stirring frame 5 through the telescopic assembly; The stirring wings on the outer stirring frame 5 and the stirring wings on the inner drill rod 32 are arranged alternately; The construction of the mixing blade diameter change can be started once or multiple times.
[0046] Preferably, in combination with the above scheme, as shown in Figures 1 to Fig.10 As shown, in step S3: during the drilling and mixing process, according to the shape design requirements of the bidirectional mixing pile, the mixing wing diameter changing construction operation is not started, or is started once or multiple times, until the mixing drill is lifted out of the ground to form a "multi-section" or any shape of variable diameter bidirectional mixing pile.
[0047] The solution provided by the present invention solves the inherent problems of traditional unidirectional mixing drills, such as uneven mixing, slurry bubbling on the ground, drill sticking, low pile body strength, high material consumption, and long construction time. While reducing material consumption and saving construction time, it can greatly improve the uniformity and pile body strength of bidirectional mixing piles and comprehensively improve the construction quality.
[0048] The solution provided by the present invention can avoid the problem that the expanded pile diameter cannot be effectively controlled when high-pressure rotary grouting is used to expand the pile, and the disadvantage that the variable diameter blades of the traditional mechanical expanded diameter mixing pile drilling tool cannot be fully opened.
[0049] The above is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the above-mentioned technical content without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any changes, modifications, equivalent changes and modifications made to the above embodiments based on the technology of the present invention without departing from the content of the technical solution of the present invention belong to the protection scope of the present technical solution.
Claims
1. A multi-layer shear mixing drilling rig, characterized in that: The mixing drill comprises a drill rod assembly (3) and a drill bit assembly (4); the drill rod assembly (3) comprises a drill rod, the drill rod comprising an outer drill rod (31) and an inner drill rod (32), the outer drill rod (31) being sleeved outside the inner drill rod (32), and the outer drill rod (31) and the inner drill rod (32) being capable of independently rotating around the same axis; the drill bit assembly (4) comprises an outer mixing frame (5) and a mixing wing assembly; a first end of the outer mixing frame (5) is connected to the outer drill rod The outer stirring frame (5) is connected to the inner drill rod (31), the second end of the stirring frame (5) is connected to the inner drill rod (32) and can rotate around the inner drill rod (32), and the outer stirring frame (5) can be extended and retracted along the radial direction of the drill rod; the outer stirring frame (5) rotates together with the outer drill rod (31); the stirring wing assembly is respectively fixedly arranged on the outer stirring frame (5) and the inner drill rod (32), and the stirring wings (50) on the stirring wing assembly can be extended and retracted along the radial direction of the drill rod; The stirring wing assembly comprises an inner stirring wing assembly (7) and an outer stirring wing assembly (8); the inner stirring wing assembly (7) is provided in plurality and arranged on the inner drill rod (32) at intervals from top to bottom; the outer stirring wing assembly (8) is provided in plurality and arranged on the inner side of the outer stirring frame (5) at intervals from top to bottom; the inner stirring wing assembly (7) and the outer stirring wing assembly (8) are arranged in an opposite and cross-direction.
2. The multi-layer shear mixing drilling rig according to claim 1, characterized in that: The first end of the outer stirring frame (5) is connected to the outer drill rod (31) via a first telescopic arm (6a), and the second end of the outer stirring frame (5) is connected to a casing (33) via a second telescopic arm (6b); the first telescopic arm (6a) and the second telescopic arm (6b) are capable of telescoping in the radial direction of the drill rod; the casing (33) is sleeved on the inner drill rod (32), and the inner drill rod (32) is capable of rotating within the casing (33).
3. The multi-layer shear mixing drilling rig according to claim 1, characterized in that: The inner stirring wing assembly (7) comprises a telescopic assembly, a stirring wing (50) and a mounting seat (60); the mounting seat (60) of the inner stirring wing assembly (7) is detachably connected to the inner drill rod (32) via a fixing screw (70); the telescopic assembly of the inner stirring wing assembly (7) is arranged in the mounting seat (60) of the inner stirring wing assembly (7), the stirring wing (50) of the inner stirring wing assembly (7) is connected to the telescopic assembly of the inner stirring wing assembly (7), and the telescopic assembly of the inner stirring wing assembly (7) is used to drive the stirring wing (50) of the inner stirring wing assembly (7) to telescope along the radial direction of the inner drill rod (32); The outer stirring wing assembly (8) comprises a telescopic assembly, a stirring wing (50) and a mounting seat (60); the mounting seat (60) of the outer stirring wing assembly (8) is detachably connected to the outer stirring frame (5) via a fixing screw (70); the telescopic assembly of the outer stirring wing assembly (8) is arranged in the mounting seat (60) of the outer stirring wing assembly (8), the stirring wing (50) of the outer stirring wing assembly (8) is connected to the telescopic assembly of the outer stirring wing assembly (8), and the telescopic assembly of the outer stirring wing assembly (8) is used to drive the stirring wing (50) of the outer stirring wing assembly (8) to telescope along the radial direction of the inner drill rod (32).
4. The multi-layer shear mixing drilling rig according to claim 3, characterized in that: The telescopic assembly comprises a motor (10) and a screw rod (30); the motor (10) is sealed and arranged in a mounting seat (60); the output end of the motor (10) is transmission-connected to one end of the screw rod (30) via a toothed belt (20), and can drive the screw rod (30) to rotate via the toothed belt (20); the other end of the screw rod (30) is also transmission-connected to a threaded hole on the stirring wing (50), and can drive the stirring wing (50) to telescopically move.
5. The multi-layer shear mixing drilling rig according to claim 2, characterized in that: The first telescopic arm comprises a first guide cylinder, a first telescopic cylinder and a first spring; the first end of the first guide cylinder is fixedly connected to the outer drill rod (31), the first end of the first guide cylinder is a closed end, a first fluid inlet is provided at the closed end, and the first fluid inlet is connected to the fluid delivery pipeline in the outer drill rod (31); the second end of the first guide cylinder is an open end; the first end of the first telescopic cylinder is an open end, and the second end is a closed end, the first end of the first telescopic cylinder is inserted into the first guide cylinder from the second end of the first guide cylinder, and the second end of the first telescopic cylinder is fixedly connected to the first end of the outer stirring frame (5); the first spring is provided in the first guide cylinder, the first end of the first spring is fixedly connected to the first end of the first guide cylinder, and the second end of the first spring is fixedly connected to the second end of the first telescopic cylinder; The second telescopic arm comprises a second guide cylinder, a second telescopic cylinder and a second spring; the first end of the second guide cylinder is fixedly connected to the outer stirring frame (5), the first end of the second guide cylinder is a closed end, a second fluid inlet is provided at the closed end, the second fluid inlet is connected to the fluid conveying pipeline in the outer stirring frame (5); the fluid conveying pipeline in the outer stirring frame (5) is connected to the fluid conveying pipeline in the outer drill rod (31); the second end of the second guide cylinder is an open end; the first end of the second telescopic cylinder is an open end, the second end is a closed end, the first end of the second telescopic cylinder is inserted into the second guide cylinder from the second end of the second guide cylinder, and the second end of the second telescopic cylinder is fixedly connected to the casing (33); the second spring is provided in the second guide cylinder, the first end of the second spring is fixedly connected to the first end of the second guide cylinder, and the second end of the second spring is fixedly connected to the second end of the second telescopic cylinder.
6. The multi-layer shear mixing drilling rig according to claim 1, characterized in that: The mixing drill further comprises a drill frame (1) and a power unit (2), wherein the drill frame (1) is arranged on the ground, and the power unit (2) is arranged on the drill frame (1) in a vertically ascending manner; the drill frame (1) is connected to the power unit (2) via a steel wire rope (11); the outer drill rod (31) and the inner drill rod (32) are respectively hollow structures; the outer drill rod (31) and the inner drill rod (32) are coaxially arranged and can rotate relative to each other; the upper end of the outer drill rod (31) is connected to the lower power head assembly of the power unit (2), and the upper end of the inner drill rod (32) is connected to the upper power head assembly of the power unit (2); the rotation schemes of the outer drill rod (31) and the inner drill rod (32) are opposite, so that the mixing wings on the outer mixing frame (5) and the mixing wings on the inner drill rod (32) can achieve bidirectional rotation and mixing.
7. The multi-layer shear mixing drilling rig according to claim 2, characterized in that: The outer drill rod (31) and the outer stirring frame (5) are respectively provided with a conductor groove (51); the conductor groove (51) on the outer drill rod (31) is connected to the conductor groove (51) on the outer stirring frame (5); and a circular wire pay-off frame (9) is provided at the junction between the conductor groove (51) on the outer drill rod (31) and the conductor groove (51) on the outer stirring frame (5); the conductor in the conductor groove (51) of the outer drill rod (31) bypasses the circular wire pay-off frame (9) and is respectively electrically connected to the motor (10) of the telescopic assembly (6) on each of the outer stirring frames (5) through the conductor groove (51) on the outer stirring frame (5); The inner drill rod (32) is provided with a wire groove (51), and the wires in the wire groove (51) of the inner drill rod (32) are respectively electrically connected to the motors (10) of the telescopic assemblies (6) on the inner drill rods (32).
8. The multi-layer shear mixing drilling rig according to claim 1, characterized in that: The outer stirring frame (5) is a concave structure; the outer stirring frame (5) comprises a plurality of outer stirring frames (5), and the plurality of outer stirring frames (5) are evenly spaced along the circumference of the drill rod; a plurality of groups of outer stirring wing assemblies (8) are evenly spaced along the vertical direction on the inner wall of each outer stirring frame (5); a plurality of groups of inner stirring wing assemblies (7) are evenly spaced along the vertical direction on the outer wall of the inner drill rod (32); a group of inner stirring wing assemblies (7) is staggered between two adjacent groups of outer stirring wing assemblies (8), thereby achieving multi-layer bidirectional mutual shear stirring.
9. A construction method of a multi-layer shear mixing drilling rig, using the mixing drilling rig according to any one of claims 1 to 8; characterized in that: The construction method includes the following processes: S1: After the construction site is leveled, assemble the mixing drill, move the mixing drill to the construction pile position, and prepare the background equipment; S2: starting the mixing drill, and controlling the power unit (2) through the operation control module of the mixing drill according to preset construction parameters, applying clockwise and counterclockwise torques and vertical drilling pressure to the upper power head assembly and the lower power head assembly respectively, to perform bidirectional mixing pile drilling and mixing construction; at the same time, during the drilling and mixing process, starting the diameter change construction of the mixing wings on the outer mixing frame (5) and the inner drill rod (32) through the diameter change button on the control panel of the cockpit of the mixing drill according to design requirements at a designated pile section; S3: When the bidirectional mixing pile reaches the designed depth, the power unit (2) is controlled by the operation control module of the mixing drill according to preset construction parameters, clockwise and counterclockwise torques and lifting forces are applied to the upper power head assembly and the lower power head assembly respectively, and secondary multi-layer bidirectional mutual shear mixing of the bidirectional mixing pile is performed during the upward phase of the mixing drill; S4: Repeat the construction operations of steps S2 to S3 according to the design requirements of the length, diameter and shape of the bidirectional mixing pile; S5: Finish the construction of the variable-diameter bidirectional mixing pile, transfer the mixing drill to the next pile position, and repeat the above construction steps.
10. The construction method of the multi-layer shear mixing drilling rig according to claim 9, characterized in that: In the step S2: starting the diameter-changing construction of the stirring wings on the outer stirring frame (5) and the inner drill rod (32) comprises: S21: the outer stirring frame (5) is expanded along the radial direction of the drill rod through the telescopic assembly and the drill rod; S22: the stirring wings on the outer stirring frame (5) are extended toward one side of the drill rod through the telescopic assembly; S23: the stirring wings on the inner drill rod (32) are spread out toward one side of the outer stirring frame (5) through a telescopic assembly; The stirring wings on the outer stirring frame (5) and the stirring wings on the inner drill rod (32) are arranged in a staggered manner; The stirring wing diameter change construction can be started once or multiple times; In the step S3: during the drilling and mixing process, according to the shape design requirements of the bidirectional mixing pile, the mixing wing diameter changing construction operation is not started, or is started once or multiple times, until the mixing drill is lifted out of the ground to form a multi-section or specified shape of a variable diameter bidirectional mixing pile.