A drilling device applicable to the construction of cast-in-situ pipe piles and its usage method

Abstract

The present invention relates to the field of civil engineering construction, and discloses a drilling device suitable for cast-in-place pipe pile construction and its usage method. The drilling device includes: a power source, a threaded drilling cylinder, and a hoisting machine; the power source includes a high-frequency vibrator, a rotator, a rigid protective shell, and a connecting member. The high-frequency vibrator, the rotator, and the rigid protective shell are fixed on the rigid protective shell, and a soil discharge hole for discharging muck is also provided on the rigid protective shell; the threaded drilling cylinder includes an outer cylinder, threaded blades, a middle cylinder, and an inner cylinder which are arranged in sequence from outside to inside. The threaded blades are fixed on the outer wall of the middle cylinder, and the upper end of the middle cylinder is connected to the rotator; the outer cylinder is connected to the rigid protective shell as a whole through the connecting member; the inner cylinder is connected to the upper-end power source through the connecting member. The drilling construction device of the present invention drills and takes soil through the threaded blades, can quickly and conveniently complete the pipe pile drilling in soft and hard soil layers, can be applicable to various complex constructions, and is convenient, flexible, green, and low-carbon in construction.

Description

Technical Field

[0001] The present invention relates to the field of civil engineering construction, and particularly to a drilling device applicable to cast-in-situ pipe pile construction and a using method thereof. Background Art

[0002] In infrastructure construction, foundation reinforcement is an extremely important aspect. Whether it is railways, highways, airports, or building construction, the stability of the foundation affects the safety and stability of the superstructure. For the foundations of high-rise buildings, super high-rise buildings, high-speed railways, and highways, there are strict requirements for bearing capacity or deformation. In the case where the original soft soil layer is difficult to meet the requirements of bearing and deformation, the rigid pile composite foundation reinforcement technology has become an important means. The rigid pile composite foundation reinforcement technology mainly arranges rigid pile bodies in the foundation at a certain distance, and improves the overall bearing capacity of the foundation through the end bearing force and skin friction of the piles.

[0003] In soft soil areas, cast-in-situ large-diameter pipe piles are usually formed by vibrating pipe jacking machines to extrude holes, and then concrete is poured. As a new technology, cast-in-situ large-diameter pipe piles have the advantages of high bearing capacity and material saving, and have been widely used. Cast-in-situ concrete pipe piles save the trouble of precast pipe piles and pile driving by forming holes on-site and pouring concrete, and also save transportation costs, and have little disturbance to the environment. For the same amount of concrete, the bearing capacity of cast-in-situ large-diameter pipe piles can be increased by more than 50%. However, in the operation of cast-in-situ large-diameter pipe piles, it often encounters relatively hard thick soil layers, and it is difficult to implement the traditional pipe jacking machine to extrude holes. Therefore, the entire operation process is easily blocked, affecting the project progress. Summary of the Invention

[0004] The present invention provides a drilling device applicable to cast-in-situ pipe pile construction and a using method thereof, which solves the problem that it is difficult to form holes in hard soil layers in cast-in-situ pipe pile construction technology.

[0005] A drilling device applicable to cast-in-situ pipe pile construction includes: a power source, a threaded drilling cylinder, and a hoisting machine;

[0006] The power source includes a high-frequency vibrator, a rotator, a rigid protective shell, and a connecting member. The high-frequency vibrator, the rotator, and the connecting member are fixed on the rigid protective shell, and the rigid protective shell is also provided with a soil discharge hole for discharging muck;

[0007] The threaded drilling cylinder includes an outer cylinder, threaded blades, a middle cylinder, and an inner cylinder arranged in sequence from outside to inside. The threaded blades are fixed on the outer wall of the middle cylinder, and the upper end of the middle cylinder is connected to the rotator; the outer cylinder is connected to the rigid protective shell as a whole through a connecting member; the inner cylinder is connected to the upper power source through a connecting member.

[0008] Furthermore, the above-mentioned rotator includes two parts: a motor and a roller.

[0009] Furthermore, the radial width of the above-mentioned threaded blade is not greater than the difference between the radii of the outer cylinder and the middle cylinder, and the bottom end of the threaded blade is not lower than the bottom edge of the outer cylinder.

[0010] Furthermore, the thickness of the bottom cylinder walls of the above-mentioned inner cylinder, middle cylinder, and outer cylinder gradually becomes thinner from thick.

[0011] Furthermore, the above-mentioned threaded drilling cylinder is made of high-strength steel.

[0012] Furthermore, the above-mentioned inner cylinder and outer cylinder are detachably connected.

[0013] A method of using a drilling device suitable for cast-in-place pipe pile construction, adopting the above scheme, includes the following steps:

[0014] S1: Lift and fix the drilling device to the set pipe pile position through a hoisting machine;

[0015] S2: Start the power source, the middle cylinder with the threaded blade starts to rotate, the threaded blade starts to cut the soil, and at the same time, drive the inner cylinder and the outer cylinder to sink by relying on the self-weight of the machine equipment; the middle cylinder, the threaded blade, the outer cylinder, and the inner cylinder gradually penetrate into the soil layer under the action of the power source;

[0016] S3: When the threaded drilling cylinder reaches the designed depth, stop drilling down, and set the rotator to rotate in the reverse direction to discharge the muck in the pipe cylinder, and timely clean up the muck falling from the soil discharge hole;

[0017] S4: When the muck between the middle cylinder and the outer cylinder is discharged, stop the operation of the equipment, disassemble the connecting parts of the outer cylinder and the inner cylinder, and the hoisting machine slowly pulls out through the lifting arm, the power source, the middle cylinder and the threaded blade, leaving the outer cylinder and the inner cylinder in the soil layer to form a hollow pipe hole, forming a single pipe pile hole;

[0018] S5: Lift and place the annular steel reinforcement cage into the hollow pipe hole, pour the mixed concrete material into the pipe hole, vibrate and compact it to complete a single pipe pile, and then pull out the outer cylinder and the inner cylinder while vibrating;

[0019] S6: Repeat operations S1 to S5 until all the pipe pile holes are completed in pouring.

[0020] The present invention has the following beneficial effects: The drilling construction equipment of the present invention drills and takes soil through the threaded blade, and can quickly and conveniently complete the pipe pile drilling in soft and hard soil layers; in addition, the power source of the equipment can be selected according to needs, and it can be applicable to various complex constructions, such as narrow construction areas, construction areas with limited height, etc. According to the bearing requirements of different pipe piles, threaded drilling cylinders of different lengths can also be used to form holes, which is convenient and flexible for construction; the whole set of equipment is low-carbon and low-energy-consuming, meeting the concept of green development in our country. Brief Description of the Drawings

[0021] Figure 1 Schematic plan view of the structure of the present invention;

[0022] Figure 2 is Figure 1 Schematic cross-sectional structure view of A-A in;

[0023] Figure 3 is Figure 1 Schematic cross-sectional structure view of B-B in;

[0024] Figure 4 Schematic construction view of the cast-in-place pipe pile of the present invention.

[0025] In the figure: 1 - power source; 101 - high-frequency vibrator; 102 - rotator; 1021 - roller; 1022 - motor; 103 - rigid protective shell; 104 - soil discharge hole; 105 - connecting piece; 2 - threaded drilling cylinder; 201 - outer cylinder; 202 - threaded blade; 203 - middle cylinder; 204 - inner cylinder; 3 - hoisting machinery; 301 - lifting arm; 4 - muck. Specific implementation manners

[0026] The principles and features of the present invention will be described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0027] Refer to Figures 1 to 4 , the present invention provides a drilling device applicable to the construction of cast-in-place pipe piles, including: a power source 1, a threaded drilling cylinder 2 and a hoisting machinery 3;

[0028] The power source 1 includes a high-frequency vibrator 101, a rotator 102, a rigid protective shell 103 and a connecting piece 105. The high-frequency vibrator 101, the rotator 102 and the connecting piece 105 are fixed on the rigid protective shell 103. The rigid protective shell 103 is also provided with a soil discharge hole 104 for discharging the muck 4;

[0029] The threaded drilling cylinder 2 includes an outer cylinder 201, a threaded blade 202, a middle cylinder 203 and an inner cylinder 204 which are arranged in sequence from outside to inside. The threaded blade 202 is fixed on the outer wall of the middle cylinder 203 and the upper end of the middle cylinder 203 is connected to the rotator 102; the outer cylinder 201 is connected to the rigid protective shell 103 as a whole through the connecting piece 105; the inner cylinder 204 is connected to the upper power source 1 through the connecting piece 105.

[0030] The rotator 102 includes two parts: a motor 1022 and a roller 1021.

[0031] The radial width of the threaded blade 202 is not greater than the radius difference between the outer cylinder 201 and the middle cylinder 203, and the bottom end of the threaded blade 202 is not lower than the bottom edge of the outer cylinder 203.

[0032] The bottom wall thickness of the inner cylinder 204, the middle cylinder 203, and the outer cylinder 201 gradually becomes thinner from thick to thin.

[0033] The screw drilling cylinder 2 is made of high-strength steel.

[0034] The inner cylinder 204 and the outer cylinder 201 are detachably connected.

[0035] A method of using a drilling device suitable for cast-in-place pipe pile construction includes the following steps:

[0036] S1: Lift and fix the drilling device to the set pipe pile position through the hoisting machinery 3;

[0037] S2: Start the power source 1, the middle cylinder 203 with the screw blade 202 starts to rotate, the screw blade 202 starts to cut the soil, and at the same time, the inner cylinder 204 and the outer cylinder 201 are driven to sink by the self-weight of the machine equipment; the middle cylinder 203, the screw blade 202, the outer cylinder 201, and the inner cylinder 204 gradually penetrate into the soil layer under the action of the power source 1;

[0038] S3: When the screw drilling cylinder 2 reaches the designed depth, stop the downward drilling, set the rotator 102 to rotate in the reverse direction, discharge the muck 4 in the pipe cylinder, and timely clean up the muck 4 falling from the soil discharge hole 104;

[0039] S4: When the muck 4 between the middle cylinder 203 and the outer cylinder 201 is discharged, stop the operation of the equipment, remove the connecting piece 105 of the outer cylinder 201 and the inner cylinder 204, and the hoisting machinery 3 slowly pulls out through the lifting arm 301, the power source 1, the middle cylinder 203, and the screw blade 202, leaving the outer cylinder 201 and the inner cylinder 204 in the soil layer to form a hollow pipe hole, forming a single pipe pile hole;

[0040] S5: Lift and place the annular steel reinforcement cage into the hollow pipe hole, pour the mixed concrete material into the pipe hole, vibrate and compact it to complete a single pipe pile, and then pull out the outer cylinder 201 and the inner cylinder 204 while vibrating;

[0041] S6: Repeat operations S1 to S5 until all the pipe pile holes are completed in pouring.

[0042] The above is only a preferred embodiment of the present invention. This embodiment does not represent all possible forms of the present invention. The protection scope of the present invention is not limited to such specific statements and embodiments. Various other deformations and improvements made without departing from the essence of the present invention according to these technical revelations of the present invention are still within the protection scope of the present invention.

Claims

1. A method for using a drilling device applicable to the construction of cast-in-place pipe piles, characterized in that: The drilling device includes: a power source (1), a threaded drilling cylinder (2) and a hoisting machine (3); The power source (1) includes a high-frequency vibrator (101), a rotator (102), a rigid protective shell (103) and a connecting piece (105). The high-frequency vibrator (101), the rotator (102) and the connecting piece (105) are fixed on the rigid protective shell (103). The rigid protective shell (103) is also provided with a soil discharge hole (104) for discharging soil (4); The threaded drilling cylinder (2) includes an outer cylinder (201), threaded blades (202), a middle cylinder (203), and an inner cylinder (204) arranged in sequence from outside to inside. The threaded blades (202) are fixed on the outer wall of the middle cylinder (203), and the upper end of the middle cylinder (203) is connected to the rotator (102); the outer cylinder (201) is connected to the rigid protective shell (103) as a whole through a connecting piece (105); the inner cylinder (204) is connected to the upper power source (1) through a connecting piece (105); The rotator (102) includes two parts: a motor (1022) and a roller (1021); The radial width of the threaded blade (202) is not greater than the difference between the radii of the outer cylinder (201) and the middle cylinder (203), and the bottom end of the threaded blade (202) is not lower than the bottom edge of the outer cylinder (201); The wall thicknesses of the bottom ends of the inner cylinder (204), the middle cylinder (203), and the outer cylinder (201) gradually become thinner; The threaded drilling cylinder (2) is made of high-strength steel; The inner cylinder (204) and the outer cylinder (201) are detachably connected; The using method includes the following steps: S1: Hoist and fix the drilling device to the set pipe pile position through the hoisting machine (3); S2: Start the power source (1). The middle cylinder (203) with threaded blades (202) starts to rotate, and the threaded blades (202) start to cut the soil. At the same time, the inner cylinder (204) and the outer cylinder (201) are driven to sink by the self-weight of the machine equipment; the middle cylinder (203), the threaded blades (202), the outer cylinder (201), and the inner cylinder (204) gradually penetrate into the soil layer under the action of the power source (1); S3: When the threaded drilling cylinder (2) reaches the designed depth, stop the downward drilling, and set the rotator (102) to rotate in the reverse direction to discharge the soil (4) in the pipe cylinder, and timely clean the soil (4) falling from the soil discharge hole (104); S4: When the soil (4) between the middle cylinder (203) and the outer cylinder (201) is discharged, stop the operation of the equipment, disassemble the connecting piece (105) of the outer cylinder (201) and the inner cylinder (204), and the hoisting machine (3) slowly pulls out through the lifting arm (301), the power source (1), the middle cylinder (203) and the threaded blades (202), leaving the outer cylinder (201) and the inner cylinder (204) in the soil layer to form a hollow pipe hole, forming a single pipe pile hole; S5: Hoist and place the ring-shaped steel reinforcement cage into the hollow pipe hole, pour the mixed concrete material into the pipe hole, vibrate it densely and complete the casting of a single pipe pile, and then pull out the outer cylinder (201) and the inner cylinder (204) while vibrating; S6: Repeat operations S1~S5 until the casting of all pipe pile holes is completed.

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