High-pressure jet grouting pile guide hole construction device

Abstract

The utility model relates to a high-pressure jet grouting pile guide hole construction device which is applied to the technical field of high-pressure jet grouting piles and comprises a tower and a base arranged at the bottom of the tower and further comprises a drill rod, a rotary power assembly and a hoisting and lifting assembly, a sliding assembly is arranged on the tower, and a connecting assembly is arranged between the rotary power assembly and the sliding assembly. The rotating power assembly is arranged on the tower and fixed to the sliding assembly through the connecting assembly, the rotating power assembly can move in the height direction of the tower under the action of the sliding assembly, the drill rod is arranged in the height direction and connected with the rotating power assembly, the rotating power assembly provides power for rotation of the drill rod, and the lifting assembly is connected with the sliding assembly. And the lifting assembly can drive the sliding assembly to move in the height direction of the tower. According to the high-pressure jet grouting pile guide hole construction device, the power head can be stably arranged, so that the power head cannot shake when the drill rod conducts guide hole drilling construction, and normal work of the drill rod can be guaranteed.

Description

Technical Field

[0001] This application relates to the technical field of high-pressure rotary jet grouting piles, and particularly relates to a construction device for pilot holes of high-pressure rotary jet grouting piles. Background Art

[0002] For a high-pressure rotary jet grouting pile, cement slurry is sprayed into the soil layer by a nozzle rotating at high pressure and mixed with the soil to form a continuously lapped cement solidified body. High-pressure rotary jet grouting piles are suitable for treating foundations such as silt, silty clay, cohesive soil, and silty clay, and are mainly used for strengthening the foundation to improve the bearing capacity and stability of the foundation. High-pressure rotary jet grouting piles are widely used in the field of construction engineering.

[0003] In the construction of high-pressure rotary jet grouting piles, pilot hole drilling is a key step. The purpose of pilot hole drilling is to pre-form a guiding hole in the foundation so that the subsequent rotary jet grouting pile construction can accurately follow the predetermined trajectory. Pilot hole drilling can improve the construction accuracy, efficiency, and safety of rotary jet grouting piles, ensure that the rotary jet grouting piles can accurately penetrate into the foundation, and improve the effect of foundation reinforcement.

[0004] Chinese Patent with application number CN202220548243.9 discloses a construction device for pilot holes of high-pressure rotary jet grouting piles. During construction, an electric telescopic rod and a rotary motor are used to drive the drill rod to rotate while descending, so as to perform pilot hole drilling work. The rotary motor is installed inside a placement box, and the placement box is installed on a placement plate through a vibration damping component composed of a connecting round block, a hollow round block, and a spring. During the pilot hole drilling construction of the drill rod, this causes great instability factors for the placement box and the rotary motor inside the placement box, which will cause the rotary motor to shake, thereby affecting the normal operation of the drill rod. Utility Model Content

[0005] In order to improve the defects existing in the above-mentioned prior art, this application provides a construction device for pilot holes of high-pressure rotary jet grouting piles.

[0006] A construction device for pilot holes of high-pressure rotary jet grouting piles provided by this application adopts the following technical solutions:

[0007] A construction device for guiding holes of high-pressure rotary jet grouting piles includes a tower crane and a base arranged at the bottom of the tower crane. It also includes a drill pipe, a rotary power assembly, and a hoisting and lifting assembly. The tower crane is arranged along the height direction. A sliding assembly is arranged on the tower crane. A connecting assembly is arranged between the rotary power assembly and the sliding assembly. The rotary power assembly is fixed on the sliding assembly through the connecting assembly and can move in the height direction of the tower crane under the action of the sliding assembly. The drill pipe is arranged along the height direction and is connected to the rotary power assembly. The rotary power assembly provides the power for the rotation of the drill pipe. The hoisting and lifting assembly is connected to the sliding assembly and can drive the sliding assembly to move in the height direction of the tower crane.

[0008] By adopting the above technical solutions, the rotary power assembly is firmly fixed on the sliding assembly through the connecting assembly. The sliding assembly can also be stably arranged on the tower crane and move along the height direction under the action of the hoisting and lifting assembly, thereby driving the rotary power assembly and the drill pipe to move in the height direction. The rotary power assembly provides the power for the rotation of the drill pipe, so that the work of guiding holes and drilling can be carried out. The rotary power assembly of the construction device for guiding holes of high-pressure rotary jet grouting piles in this application can be set relatively stably. Therefore, the drill pipe will not cause the rotary power assembly to shake during the construction of guiding holes and drilling, so that the normal work of the drill pipe can be guaranteed.

[0009] Optionally, the sliding assembly includes a pair of guide rails arranged on the tower crane along the height direction and a sliding block slidably installed on the pair of guide rails. The rotary power assembly is fixed on the sliding block through the connecting assembly.

[0010] By adopting the above technical solutions, the sliding assembly composed of a pair of guide rails and a sliding block can ensure that the rotary power assembly moves stably along the height direction on the tower crane under the action of the hoisting and lifting assembly.

[0011] Optionally, fitting grooves are formed on both side walls of the sliding block, and the fitting grooves penetrate through the top wall of the sliding block. The connecting assembly includes a pair of fitting angle plates arranged on the rotary power assembly. The pair of fitting angle plates are respectively fitted into the two fitting grooves from top to bottom, so as to fix the rotary power assembly on the sliding block. The connecting assembly also includes a pressing plate arranged on the top wall of the sliding block. The pressing plate and the top wall of the sliding block are fixed through fasteners, and the pressing plate closes the top slots of the two fitting grooves and abuts against the fitting angle plates.

[0012] By adopting the above technical solutions, the connecting assembly mainly composed of a pair of fitting angle plates and a pressing plate can fix the rotary power assembly on the sliding block stably and conveniently.

[0013] Optionally, the rotary power assembly is a power head, and the drill pipe is coaxially connected to the output end of the power head.

[0014] By adopting the above technical solution, the power head can provide the rotary power for the drill pipe, ensuring the smooth drilling and pilot hole drilling work of the drill pipe.

[0015] Optionally, an auxiliary slider is also slidably mounted on a pair of the guide rails. The auxiliary slider is disposed close to the slider and below the slider. A support plate is provided on the auxiliary slider, and a stable bearing is mounted on the support plate. The drill pipe passes through the stable bearing and the drill pipe has an interference fit with the inner ring of the stable bearing.

[0016] By adopting the above technical solution, the setting of the stable bearing can improve the stability of the drill pipe during the drilling and pilot hole drilling construction process, avoiding the situation that the excessive shaking amplitude of the drill pipe affects the normal construction work.

[0017] Optionally, the hoisting and lifting assembly includes a winch and a steel wire rope. The winch is disposed on the base, a reversing pulley is provided at the top of the tower. One end of the steel wire rope is wound around the drum of the winch, and after passing around the reversing pulley at the top of the tower, the other end is fixedly connected to the slider.

[0018] By adopting the above technical solution, under the combined action of the hoisting and lifting assembly and the rotary power assembly, it can ensure the smooth drilling and pilot hole drilling construction work of the drill pipe.

[0019] Optionally, a pair of ropes are symmetrically disposed on a side of the slider facing away from the rotary power assembly. A pair of ropes are connected to the slider through eyebolts, and a pair of ropes are connected to the steel wire rope through steel rings.

[0020] By adopting the above technical solution, a pair of ropes are added at the connection between the steel wire rope and the slider, and the pair of ropes are symmetrically distributed on the slider, so as to ensure the force balance of the steel wire rope on the slider and improve the stability of the movement of the slider.

[0021] Optionally, a splash guard is provided at the bottom of the tower. A through hole is opened in the middle of the splash guard, and the diameter of the through hole is larger than the diameter of the drill pipe. The drill pipe passes through the through hole.

[0022] By adopting the above technical solution, the purpose of setting the splash guard is to prevent the muddy water from splashing on the device and the construction personnel during the drilling and pilot hole drilling construction process.

[0023] In summary, the present application includes the following beneficial technical effects:

[0024] 1. The power head is firmly fixed on the sliding block by embedding an angle plate, and the sliding block can also be stably arranged on the tower and move along the height direction under the action of the winch, thereby driving the power head and the drill pipe to move in the height direction. The power head provides the power for the rotation of the drill pipe, so that the pilot hole drilling work can be carried out. The power head of the high-pressure jet grouting pile pilot hole construction device of the present application can be set relatively stably. Therefore, the drill pipe will not cause the power head to shake during the pilot hole drilling construction, so the normal operation of the drill pipe can be ensured.

[0025] 2. The setting of the stable bearing can improve the stability of the drill pipe during the drilling and pilot hole construction process, and avoid the situation that the excessive shaking amplitude of the drill pipe affects the normal construction work.

[0026] 3. A pair of ropes are added at the connection between the steel wire rope and the sliding block, and the pair of ropes are symmetrically distributed on the sliding block. In this way, the force balance of the steel wire rope on the sliding block can be ensured, and the stability of the movement of the sliding block can be improved. Brief Description of the Drawings

[0027] Figure 1 It is a three-dimensional structural schematic diagram of the high-pressure jet grouting pile pilot hole construction device of the embodiment of the present application.

[0028] Figure 2 It is a structural schematic diagram of the sliding component and the connecting component of the embodiment of the present application.

[0029] Reference Signs: 1. Tower; 2. Base; 3. Drill Pipe; 4. Sliding Component; 41. Guide Rail; 42. Sliding Block; 421. Embedding Groove; 5. Connecting Component; 51. Embedding Angle Plate; 52. Pressing Plate; 6. Rotating Power Component; 7. Lifting and Lifting Component; 71. Winch; 72. Steel Wire Rope; 73. Reversing Pulley; 8. Steel Ring; 9. Splash Guard; 10. Fastener; 11. Auxiliary Sliding Block; 12. Support Plate; 13. Stable Bearing; 14. Rope; 15. Suspension Ring. Detailed Description of the Invention

[0030] The following will further describe the present application in detail Figure 1-2 in conjunction with the attached drawings.

[0031] The embodiment of the present application discloses a high-pressure jet grouting pile pilot hole construction device. Refer to Figure 1, The high-pressure jet grouting pile pilot hole construction device includes a tower crane 1 and a base 2 provided at the bottom of the tower crane 1 for fixing the tower crane 1. The high-pressure jet grouting pile pilot hole construction device further includes a drill pipe 3, a rotary power assembly 6 for providing the rotary power of the drill pipe 3, and a hoisting and lifting assembly 7 for driving the drill pipe 3 to move in the height direction. The tower crane 1 is arranged along the height direction and provides the basis for the installation of the drill pipe 3 and each component. Under the combined action of the hoisting and lifting assembly 7 and the rotary power assembly 6, the drill pipe 3 can smoothly carry out the drilling and pilot hole construction work.

[0032] Refer to Figure 1-2 , The rotary power assembly 6 is actually a power head that can provide the rotary power of the drill pipe 3, and the output end of the power head is coaxially connected to the top end of the drill pipe 3. A sliding assembly 4 and a connecting assembly 5 are provided between the power head and the tower crane 1. The sliding assembly 4 is arranged on the tower crane 1 and can move along the height direction of the tower crane 1. The connecting assembly 5 is arranged between the power head and the sliding assembly 4, and functions to fix the power head on the sliding assembly 4. In this way, under the action of the hoisting and lifting assembly 7, the sliding assembly 4 is driven to move in the height direction of the tower crane 1, and then the power head and the drill pipe 3 are driven to move in the height direction.

[0033] Specifically, the sliding assembly 4 includes a pair of guide rails 41 and a sliding block 42. The pair of guide rails 41 are arranged at intervals and fixed on the tower crane 1 along the height direction. The sliding block 42 is slidably arranged on the pair of guide rails 41. The connecting assembly 5 includes a pair of embedded angle plates 51 and a pressing plate 52. Embedded grooves 421 are opened on both side walls of the sliding block 42, and the embedded grooves 421 penetrate upward through the top wall of the sliding block 42. The pair of embedded angle plates 51 are fixed on the power head and symmetrically distributed on the power head. The pair of embedded angle plates 51 can be respectively embedded into the two embedded grooves 421 from top to bottom. The embedded angle plates 51 and the embedded grooves 421 are completely adapted, so that the power head can be pre-fixed on the sliding block 42. Secondly, the pressing plate 52 is placed on the top wall of the sliding block 42. The two ends of the pressing plate 52 can close the top slots of the two embedded grooves 421 and are in a mutually pressing relationship with the embedded angle plates 51. The middle part of the pressing plate 52 and the top wall of the sliding block 42 are fixed by fasteners 10. The fasteners 10 are fastening bolts. In this way, the power head can be firmly fixed on the sliding block 42, so that the power head and the drill pipe 3 can be stable during the drilling and pilot hole construction process.

[0034] Refer to Figure 1, the hoisting and lifting assembly 7 of the present application includes a winch 71, a steel wire rope 72, and a reversing pulley 73. The winch 71 is installed and fixed on the base 2, and the reversing pulley 73 is installed and fixed on the top of the tower 1. One end of the steel wire rope 72 is connected to the drum of the winch 71 and wound around the drum of the winch 71. After passing around the reversing pulley 73 at the top of the tower 1, the other end of the steel wire rope 72 is connected to the sliding block 42. It should be noted here that two lifting rings 15 can be symmetrically arranged on the side of the sliding block 42 facing away from the power head. A rope 14 is connected to each of the two lifting rings 15, and the two ropes 14 and the steel wire rope 72 are connected through a steel ring 8. The purpose of this structural design is to ensure the balanced force of the steel wire rope 72 on the sliding block 42, thereby improving the stability of the movement of the sliding block 42. During construction, the winch 71 operates to release the steel wire rope 72, causing the sliding block 42 to move downward along the height direction of the tower 1, thereby driving the power head and the drill pipe 3 to move downward. Coupled with the power head providing the rotational power for the drill pipe 3, the drilling and hole-leading construction work of the drill pipe 3 can be smoothly carried out.

[0035] Referring to Figure 1 , on the basis of the above technical solutions of the present application, considering that the technical solutions of the present application are more optimized, firstly, an auxiliary slider 11 can also be slidably arranged on a pair of guide rails 41. The auxiliary slider 11 is located below the sliding block 42 but relatively close to the sliding block 42. A support plate 12 is fixedly arranged on the auxiliary slider 11, and a stable bearing 13 is installed on the support plate 12. The drill pipe 3 passes through the stable bearing 13 and the drill pipe 3 has an interference fit with the inner ring of the stable bearing 13. In this way, under the action of the stable bearing 13, the stability of the drill pipe 3 during the drilling and hole-leading construction process can be improved, and the situation where the drill pipe 3 shakes too much and affects the normal construction work can be avoided. Secondly, a splash-proof cover 9 can be fixedly arranged at the bottom of the tower 1. The middle part of the splash-proof cover 9 has a through hole with a diameter larger than the diameter of the drill pipe 3. The drill pipe 3 passes through the through hole. In this way, under the action of the splash-proof cover 9, the mud and water can be prevented from splashing onto the high-pressure jet grouting pile hole-leading construction device of the present application and the construction personnel during the drilling and hole-leading construction process of the drill pipe 3.

[0036] The implementation principle of a high-pressure jet grouting pile hole-leading construction device disclosed in an embodiment of the present application is as follows: The power head is firmly fixed on the sliding block 42 through the embedded angle plate 51, and the sliding block 42 can also be stably arranged on the tower 1 and move along the height direction under the action of the winch 71, thereby driving the power head and the drill pipe 3 to move in the height direction. The power head provides the rotational power for the drill pipe 3, so that the hole-leading and drilling work can be carried out. The power head of the high-pressure jet grouting pile hole-leading construction device of the present application can be stably arranged, so the drill pipe 3 will not cause the power head to shake during the hole-leading and drilling construction, and thus the normal work of the drill pipe 3 can be ensured.

[0037] The above are all preferred embodiments of this application, and the protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A construction device for leading holes of high-pressure jet grouting piles, characterized in that, It includes a tower (1) and a base (2) provided at the bottom of the tower (1), and further includes a drill pipe (3), a rotary power assembly (6) and a hoisting and lifting assembly (7). The tower (1) is arranged along the height direction, a sliding assembly (4) is provided on the tower (1), a connecting assembly (5) is provided between the rotary power assembly (6) and the sliding assembly (4), the rotary power assembly (6) is fixed on the sliding assembly (4) through the connecting assembly (5), and under the action of the sliding assembly (4), the rotary power assembly (6) can move in the height direction of the tower (1). The drill pipe (3) is arranged along the height direction and is connected to the rotary power assembly (6), the rotary power assembly (6) provides the power for the rotation of the drill pipe (3), the hoisting and lifting assembly (7) is connected to the sliding assembly (4), and the hoisting and lifting assembly (7) can drive the sliding assembly (4) to move in the height direction of the tower (1); The sliding assembly (4) includes a pair of guide rails (41) arranged on the tower (1) along the height direction and a sliding block (42) slidably mounted on the pair of guide rails (41), and the rotary power assembly (6) is fixed on the sliding block (42) through the connecting assembly (5); Mounting grooves (421) are formed on both side walls of the sliding block (42), and the mounting grooves (421) penetrate through the top wall of the sliding block (42). The connecting assembly (5) includes a pair of mounting angle plates (51) provided on the rotary power assembly (6), and the pair of mounting angle plates (51) are respectively mounted in the two mounting grooves (421) from top to bottom, so as to fix the rotary power assembly (6) on the sliding block (42). The connecting assembly (5) further includes a pressing plate (52) provided on the top wall of the sliding block (42), the pressing plate (52) and the top wall of the sliding block (42) are fixed through fasteners (10), and the pressing plate (52) closes the top slots of the two mounting grooves (421) and abuts against the mounting angle plates (51).

2. The high-pressure rotary jet grouting pile pilot hole construction device according to claim 1, characterized in that, The rotary power assembly (6) is a power head, and the drill pipe (3) is coaxially connected to the output end of the power head.

3. The high-pressure rotary jet grouting pile pilot hole construction device according to claim 1, characterized in that, An auxiliary slider (11) is further slidably mounted on the pair of guide rails (41). The auxiliary slider (11) is arranged close to the sliding block (42) and is located below the sliding block (42). A support plate (12) is provided on the auxiliary slider (11), a stabilizing bearing (13) is mounted on the support plate (12), the drill pipe (3) passes through the stabilizing bearing (13), and the drill pipe (3) is in interference fit with the inner ring of the stabilizing bearing (13).

4. A construction device for pre-boring of high-pressure jet grouting piles according to claim 1, characterized in that, The lifting and lowering assembly (7) includes a winch (71) and a wire rope (72). The winch (71) is arranged on the base (2), and a reversing pulley (73) is arranged at the top of the tower (1). One end of the wire rope (72) is wound around the drum of the winch (71), and after passing around the reversing pulley (73) at the top of the tower (1), the other end is fixedly connected to the sliding block (42).

5. The high-pressure rotary jet grouting pile pilot hole construction device according to claim 4, characterized in that, A pair of ropes (14) are symmetrically arranged on the side of the sliding block (42) facing away from the rotary power assembly (6). A sling (15) is used to connect each of the pair of ropes (14) to the sliding block (42), and a steel ring (8) is used to connect the pair of ropes (14) to the wire rope (72).

6. The high-pressure rotary jet grouting pile pilot hole construction device according to claim 1, characterized in that, A splash guard (9) is arranged at the bottom of the tower (1). A through hole is formed in the middle of the splash guard (9), and the diameter of the through hole is larger than the diameter of the drill pipe (3). The drill pipe (3) passes through the through hole.

Images