CN116575861B - An edge-supported foundation pile drilling device and construction method for house construction - Google Patents

Abstract

The invention relates to the technical field of pile foundation drilling, and specifically relates to an edge-supported pile drilling device and a construction method for house construction, which includes a drill bit, a drill rod and a protection component. The protection component includes a fixed sleeve, a movable frame, roller and fixed ring. The fixed sleeve is coaxially movable and set on the drill pipe. The movable frame slides outside the fixed sleeve along the radial direction of the fixed sleeve. The axis of the drum is parallel to the fixed sleeve and the drum follows the movement. The frame moves, the fixed ring is coaxially fixed on the drill pipe, and the fixed sleeve is between the drill bit and the fixed ring. The invention ensures that the entire side wall of the top of the pile foundation hole will not partially collapse when the drill bit is drilling, and at the same time, the roller will not get stuck in the side wall of the top of the pile foundation hole when the drill bit is drilling, thereby completing the There will be no local collapse when taking out the drill bit after drilling work.

Description

An edge-supported foundation pile drilling device and construction method for house construction

Technical field

The invention relates to the technical field of pile foundation drilling, and in particular to an edge-supported foundation pile drilling device and a construction method for house construction.

Background technique

Civil engineering is a general term for the science and technology of constructing various types of land engineering facilities; that is, various engineering facilities built on the ground or underground or on land that directly or indirectly serve human life, production, military, and scientific research. When carrying out civil engineering construction , foundation piles need to be installed, and a drilling machine is required to drill holes in the ground. Existing pile drilling devices usually drill holes directly during punching construction. As the drill bit continues to penetrate deeper, the opening of the pile foundation hole continues to receive vibrations, which can easily lead to loosening, and the edges of the pile foundation hole can easily loosen and collapse. , the soil clods on the side walls of the pile foundation holes are prone to falling off.

Chinese patent application CN115961879A discloses a pile foundation drilling device that can provide edge support and a method of using it. The drill bit moves downward to drive the mounting seat and the pressing seat to move downward simultaneously. At this time, the pressing seat and the mounting seat are in a relatively static state. , when the mounting seat is in contact with the top side wall of the pile foundation hole, the pressing seat and the mounting seat will slide relative to each other. At this time, the inner support block inside the mounting seat will move along the radial direction of the mounting seat to support the top of the pile foundation hole. , but when this solution is used, because all the internal support blocks cannot fully fit with all the side walls of the pile foundation hole at the same time, the part of the pile foundation hole that is not in contact with the internal support blocks still partially collapses, and at the same time, the internal support blocks The block may also get stuck into the side wall of the pile foundation hole, causing local collapse when the mounting base is separated from the pile foundation hole.

Contents of the invention

In view of the above problems, an edge-supported foundation pile drilling device for house construction is provided. The roller rotates around the axis of the pile foundation hole to squeeze and strengthen the soil on the top side wall of the pile foundation hole. Through the movable frame and the fixed The sleeve fit allows the distance between the axes of the drum pile foundation holes to be changed, and the time for the drum to perform circular motion is limited by the fit of the fixed sleeve and the fixed ring.

In order to solve the existing technical problems, an edge-supported foundation pile drilling device for house construction is provided, which includes a drill bit, a drill rod and a protective component. The protective component includes a fixed sleeve, a movable frame, a roller and a fixed ring. The fixed sleeve is coaxially mounted on the drill pipe with a movable sleeve. The movable frame slides outside the fixed sleeve along the radial direction of the fixed sleeve. The axis of the drum is parallel to the fixed sleeve and the drum moves with the movable frame. The fixed ring moves at the same time. The shaft fixed sleeve is installed on the drill pipe, and the fixed sleeve is between the drill bit and the fixed ring. When the bottom surface of the fixed ring contacts the ground, the fixed ring can slide along the axial direction of the drill pipe, and the fixed sleeve can follow The drill pipe rotates and the movable frame moves away from the fixed sleeve.

Preferably, the fixed sleeve also includes a fixed frame and a first movable bar. The number of fixed frames is three. The three fixed frames are evenly arranged around the axis of the fixed sleeve. The fixed frame is in the form of a horizontal bar and two longitudinal bars. The two vertical bars in the fixed frame are arranged in the direction of the axis of the fixed sleeve and extend in the direction away from the fixed sleeve. The vertical bars in the fixed frame are provided with A groove capable of sliding the first movable bar. The sliding direction of the first movable bar is parallel to the diameter direction of the fixed sleeve. The first movable bar can slide to the outside of the fixed frame. The fixed sleeve is provided with a groove capable of sliding the first movable bar. The drill rod is provided with a first chute that can slide with the first movable bar through a through hole through which the drill rod passes. The length direction of the first chute is parallel to the axis of the drill rod. The movable frame is slidably arranged inside the fixed frame.

Preferably, the protection component also includes a movable rod and a pull rope. The movable rod can be rotated between two longitudinal rods in the fixed frame. The axis of the movable rod is parallel to the axis of the fixed sleeve. The movable frame is in the form of a horizontal bar. and two longitudinal bars. The two longitudinal bars in the movable frame are set in a direction away from the fixed sleeve. One end of the pull rope is fixedly connected to the side wall of the movable rod, and the other end of the pull rope is connected to the horizontal rod in the movable frame. The rods are fixedly connected, and a first elastic connecting piece is fixedly arranged between the crossbar in the movable frame and the fixed frame.

Preferably, the movable rod further includes a gear. The gears are coaxially slidably arranged at both ends of the movable rod. The gears can rotate synchronously with the movable rod. The first movable bar is fixedly provided with a rack capable of meshing with the gear.

Preferably, the movable rod also includes a snap-in shaft and a second elastic connector. The movable shaft is coaxially slidably disposed at both ends of the movable lever. The axis center of the gear is provided with a snap-in hole into which the snap-in shaft can be inserted. The elastic connector is fixedly arranged between the movable rod and the clamping shaft. The first movable bar is L-shaped and one end of the first movable bar is set toward the direction close to the fixed sleeve. Both longitudinal bars in the movable frame are provided with There are two second slide grooves, the length direction of the second slide groove is parallel to the sliding direction of the movable frame, and the fixed frame is fixedly provided with a limiting protrusion that can slide and cooperate with the second slide groove.

Preferably, two parallel second slide grooves are provided on each longitudinal rod on the movable frame.

Preferably, the protection component also includes a first movable ring, and a second movable bar sliding along the radial direction of the fixed ring is provided inside the fixed ring. The second movable bar can penetrate the inner wall of the fixed ring, and the drill pipe is provided with a There are three positioning holes that can be inserted into the second movable bar. The three positioning holes are evenly arranged around the axis of the drill pipe. The first movable ring is coaxially slidably arranged below the fixed ring. A fixed protrusion is fixedly provided on the upward side of a movable ring, and a first guide groove capable of slidingly cooperating with the second movable strip is provided on the fixed protrusion.

Preferably, the fixed ring also includes a third movable bar, the third movable bar is slidably arranged inside the fixed ring, the second movable bar and the first movable bar are equal in number and spaced apart, and the sliding direction of the third movable bar is in line with the first movable bar. The diameter direction of the fixed ring is parallel, the fixed protrusion is provided with a second guide groove that can slide with the third movable bar, the third movable bar is provided with a threaded hole, and the first movable bar is fixedly provided with a threaded hole that can slide with the third movable bar. A third elastic connector is fixed between the threaded fixed shaft, the first movable bar and the fixed frame.

Preferably, the protection component further includes a second movable ring, the second movable ring is coaxially slidably disposed above the fixed ring, a fourth elastic connector is fixedly disposed between the second movable ring and the fixed ring, and the fixing protrusion The upward end is fixedly provided with a magnetic component capable of anisotropic magnetic cooperation with the second movable ring.

An edge-supported foundation pile drilling method for house construction uses an edge-supported foundation pile drilling device for house construction, which includes the following steps:

S1. When the drill rod drives the drill bit to rotate, it will also drive the drill bit downward in the vertical direction into the ground to form a pile foundation hole. The protection component will follow the drill bit to move into the pile foundation hole. At this time, the fixed sleeve and the drill rod move coaxially. When matched, the drum is located close to the axis of the fixed sleeve, and the fixed ring is coaxially fixed with the drill pipe;

S2. When the fixed sleeve enters the inside of the pile foundation hole and the fixed ring is in contact with the ground, the fixed ring can slide axially along the drill pipe, and the roller is at a position away from the axis of the fixed sleeve and in contact with the pile. The side walls of the base hole are in contact, and the fixed sleeve and the drill pipe are fixed radially;

S3. As the drill bit continues to penetrate deep into the ground, the drum will perform circular motion around the axis of the drill pipe and will also rotate itself, thereby continuously squeezing and reinforcing the top side wall of the pile foundation hole, thereby avoiding local collapse.

Compared with the prior art, the beneficial effects of the present invention are: the present invention realizes squeezing and reinforcing the soil on the top side wall of the pile foundation hole by rotating the roller around the axis of the pile foundation hole, and realizes this through the cooperation of the movable frame and the fixed sleeve. The distance between the drum and the axis of the pile foundation hole can be changed. Through the cooperation of the fixed sleeve and the fixed ring, the drum will not perform circular motion until it completely enters the inside of the pile foundation hole, thereby ensuring that the pile foundation is drilled when the drill bit is drilling. The entire side wall at the top of the hole will not be partially collapsed. At the same time, the roller will not get stuck in the side wall at the top of the pile foundation hole when the drill bit is drilling. Therefore, there will be no partial collapse when the drill bit is taken out after the drilling is completed. Collapse situation.

Description of the drawings

Figure 1 is a three-dimensional schematic diagram of an edge-supported foundation pile drilling device for house construction;

Figure 2 is a front view of an edge-supported foundation pile drilling device for house construction;

Figure 3 is a schematic cross-sectional view of an edge-supported pile drilling device for house construction;

Figure 4 is a partially enlarged schematic diagram of A in Figure 3;

Figure 5 is a schematic cross-sectional view two of an edge-supported foundation pile drilling device for house construction;

Figure 6 is a partially enlarged schematic diagram of B in Figure 5;

Figure 7 is a three-dimensional exploded schematic diagram of a protective component in an edge-supported foundation pile drilling device for house construction;

Figure 8 is a three-dimensional exploded schematic view of the fixing sleeve in the protection assembly;

Figure 9 is a three-dimensional exploded schematic view of the fixing bracket in the fixing sleeve;

Figure 10 is an exploded perspective view of the fixed ring in the protection assembly.

The numbers in the figure are: 1-drill bit; 2-drill rod; 21-first chute; 22-positioning hole; 3-protection component; 31-fixing sleeve; 311-fixing frame; 3111-groove; 3112-limit 312-first movable bar; 3121-rack; 3122-fixed shaft; 3123-third elastic connector; 313-through hole; 32-movable frame; 321-first elastic connector; 322-th Two chute; 33-roller; 34-fixed ring; 341-second movable bar; 342-third movable bar; 3421-threaded hole; 35-movable rod; 351-gear; 3511-clip hole; 352- Snap shaft; 353-second elastic connector; 36-pulling rope; 37-first movable ring; 371-fixing protrusion; 372-first guide groove; 373-second guide groove; 374-magnetic member; 38 -Second movable ring; 381-Fourth elastic connector.

Detailed ways

In order to further understand the characteristics, technical means, and specific purposes and functions of the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and specific implementation modes.

Referring to Figures 1, 4 and 6, an edge-supported pile drilling device for house construction includes a drill bit 1, a drill rod 2 and a protection component 3. The protection component 3 includes a fixed sleeve 31, The movable frame 32, the roller 33 and the fixed ring 34. The fixed sleeve 31 is movable coaxially on the drill pipe 2. The movable frame 32 slides outside the fixed sleeve 31 along the radial direction of the fixed sleeve 31. The roller 33 is The axis is parallel to the fixed sleeve 31 and the drum 33 moves with the movable frame 32. The fixed ring 34 is coaxially fixed on the drill pipe 2. The fixed sleeve 31 is between the drill bit 1 and the fixed ring 34. When the fixed ring 34 is When the bottom surface of the ring 34 is in contact with the ground, the fixed ring 34 can slide along the axial direction of the drill pipe 2 , the fixed sleeve 31 can rotate following the drill pipe 2 , and the movable frame 32 moves away from the fixed sleeve 31 .

Move the entire device to the working position. The other end of the drill rod is connected to a servo motor. Start the servo motor so that the drill rod 2 drives the drill bit 1 to rotate. At the same time, the drill rod 2 is moved in the vertical direction to drive the drill bit 1 in the vertical direction. into the ground to form a pile foundation hole, and the protection component 3 will follow the drill bit 1 to move into the pile foundation hole. At this time, the fixed sleeve 31 and the drill pipe 2 coaxially flexibly cooperate, and the roller 33 is in a position close to the axis of the fixed sleeve 31. The fixed ring 34 is coaxially fixed with the drill pipe 2. When the fixed sleeve 31 enters the inside of the hole and the fixed ring 34 contacts the ground, the fixed ring 34 can slide axially along the drill pipe 2, and the roller 33 is in a position far away from the axis of the fixed sleeve 31 and in contact with the side wall of the pile foundation hole. The fixed sleeve 31 and the drill pipe 2 are fixed radially. At this time, the fixed sleeve 31 follows the rotation of the drill pipe 2. Rotate, the drill bit 1 continues to penetrate deep into the ground, and the drum 33 performs a circular motion around the axis of the drill pipe 2 and will also perform a rotational motion, thereby continuously squeezing and reinforcing the top side wall of the pile foundation hole, thereby avoiding local collapse. Compared with the prior art, the roller 33 of the present invention rotates around the axis of the pile foundation hole to squeeze and reinforce the soil on the top side wall of the pile foundation hole. The movable frame 32 and the fixed sleeve 31 cooperate to make the roller 33 and the pile foundation hole The distance between the axes can be changed. The fixed sleeve 31 and the fixed ring 34 cooperate to make the roller 33 completely enter the inside of the pile foundation hole before performing a circular motion, thereby ensuring that the top of the pile foundation hole is ensured when the drill bit 1 performs drilling work. The entire side wall of the pile foundation hole will not be partially collapsed. At the same time, the roller 33 will not get stuck in the side wall at the top of the pile foundation hole when the drill bit 1 is drilling, and then it will not occur when the drill bit 1 is taken out after the drilling work is completed. Local collapse situation.

Referring to Figures 2 and 7-9: the fixed sleeve 31 also includes a fixed frame 311 and a first movable bar 312. The number of the fixed frames 311 is three, and the three fixed frames 311 surround the fixed sleeve 31. The axis of the fixed frame 311 is evenly arranged, and the fixed frame 311 is U-shaped consisting of a horizontal bar and two longitudinal bars. The two longitudinal bars in the fixed frame 311 are arranged along the axis direction of the fixed sleeve 31 and the two longitudinal bars in the fixed frame 311 The rod extends in a direction away from the fixed sleeve 31. The vertical rod in the fixed frame 311 is provided with a groove 3111 for the first movable bar 312 to slide. The sliding direction of the first movable bar 312 is consistent with the diameter direction of the fixed sleeve 31. In parallel, the first movable bar 312 can slide to the outside of the fixed frame 311. The fixed sleeve 31 is provided with a through hole 313 for the first movable bar 312 to pass through. The drill pipe 2 is provided with a through hole 313 that can communicate with the first movable bar 312. The first chute 21 is slidably fitted, the length direction of the first chute 21 is parallel to the axis of the drill pipe 2 , and the movable frame 32 is slidably arranged inside the fixed frame 311 .

When the fixed ring 34 is not in contact with the ground, the fixed ring 34 and the drill pipe 2 maintain a coaxial fixed connection. At this time, the first movable bar 312 passes through the through hole 313 and does not enter the first chute 21. At this time, it is fixed. The collar can be coaxially movably connected with the drill pipe 2. When the fixed ring 34 contacts the ground, the first movable bar 312 is inserted into the first chute 21, and the fixed ring 34 is released from coaxiality with the drill pipe 2. Fixed connection, the fixed sleeve 31 will drive the drum 33 to rotate. Compared with the existing technology, the first movable strip 312 of the present invention can be inserted into or away from the first chute 21 as needed, thereby making the fixed sleeve 31 and the drill pipe The status relationship between 2 can be changed.

Referring to Figures 2 and 7-9: the protection component 3 also includes a movable rod 35 and a pull cord 36. The movable rod 35 is rotatably disposed between the two longitudinal rods in the fixed frame 311. The movable rod 35 The axis is parallel to the axis of the fixed sleeve 31. The movable frame 32 is U-shaped consisting of a horizontal bar and two longitudinal bars. The two longitudinal bars in the movable frame 32 are arranged in a direction away from the fixed sleeve 31. The pull rope 36 One end is fixedly connected to the side wall of the movable rod 35, and the other end of the pull rope 36 is fixedly connected to the crossbar in the movable frame 32. A first elastic connector 321 is fixedly provided between the crossbar in the movable frame 32 and the fixed frame 311.

The movable rod 35 rotates in one direction to wind up the pull rope 36. The movable frame 32 continues to approach the movable rod 35 under the action of the pull rope 36. The first elastic connecting member 321 is continuously compressed, and the movable rod 35 rotates in the other direction. Thereby the pull cord 36 is released, and the first elastic connector 321 recovers its deformation and releases the elastic force to push the movable frame 32 away from the fixed sleeve 31. Compared with the prior art, the pull cord 36 and the first elastic connector 321 of the present invention allow the movable frame 32 to move freely. The force when the frame 32 moves away from the fixing sleeve 31 is provided by the first elastic connecting member 321, thereby preventing the roller 33 from being inserted into the side wall of the pile foundation hole.

Referring to Figures 2 and 7-9: the movable rod 35 also includes a gear 351, which is coaxially slidably disposed at both ends of the movable rod 35. The gear 351 can rotate synchronously with the movable rod 35. The first movable bar A rack 3121 capable of meshing with the gear 351 is fixedly provided on the rack 312 .

When the first movable bar 312 moves, the rack 3121 will follow the movement of the first movable bar 312. When the rack 3121 moves, it will push the gear 351 to rotate. The rotation of the gear 351 will drive the movable rod 35 to rotate, thereby rolling up the pull rope 36. and release work, compared with the prior art, the gear 351 and the rack 3121 of the present invention cooperate so that the movement of the first movable bar 312 can drive the movable rod 35 to rotate, thereby ensuring that the horizontal movement of the drum 33 is in the circular motion of the drum 33 carried out before.

Referring to Figures 2 and 7-9: the movable rod 35 also includes a snap shaft 352 and a second elastic connector 353. The snap shaft 352 is coaxially slidably disposed at both ends of the movable lever 35, and the shaft of the gear 351 There is a snap hole 3511 in the center for the snap shaft 352 to be inserted. The second elastic connector 353 is fixedly arranged between the movable rod 35 and the snap shaft 352. The first movable bar 312 is L-shaped and the first movable bar 312 One end of the movable frame 32 is set toward the direction close to the fixed sleeve 31. Second chute 322 is provided on the two longitudinal bars of the movable frame 32. The length direction of the second chute 322 is parallel to the sliding direction of the movable frame 32. The fixed frame 311 The upper part is fixedly provided with a limiting protrusion 3112 that can slide with the second slide groove 322 .

Press the first movable bar 312 close to the fixed frame 311 along the axis direction of the fixed sleeve 31, and then push the first movable bar 312 away from the fixed sleeve 31 along the diameter direction of the fixed sleeve 31. At this time, the fixed frame 311 and the fixed sleeve 31, remove the fixed bracket 311 and remove the first movable bar 312 from the fixed bracket 311, then control the two gears 351 to disengage from the clamping shaft 352, press the clamping shaft 352 and enter the movable rod 35 Take out the movable rod 35 from the fixed frame 311. At this time, slide the movable frame 32 to take out the movable frame 32 from the fixed frame 311. Compared with the prior art, all parts on the fixed frame 311 of the present invention can be removed. disassembly so that the maximum moving distance of the drum 33 can be changed.

Referring to Figures 2 and 7-9, each longitudinal rod in the movable frame 32 is provided with two parallel second slide grooves 322.

When the movable frame 32 slides, the two limiting protrusions 3112 will always be engaged in the two second slide grooves 322. Compared with the prior art, the second slide grooves 322 of the present invention limit their number and position, thereby limiting the movement. The movement state of the rack 32 is limited.

Referring to Figures 2, 7 and 10: the protection component 3 also includes a first movable ring 37, and a second movable bar 341 sliding along the radial direction of the fixed ring 34 is provided inside the fixed ring 34. The strip 341 can penetrate the inner wall of the fixed ring 34. The drill rod 2 is provided with three positioning holes 22 into which the second movable strip 341 can be inserted. The three positioning holes 22 surround the drill pipe. The axis of 2 is evenly arranged, the first movable ring 37 is coaxially slidably arranged below the fixed ring 34, the upward side of the first movable ring 37 is fixedly provided with a fixed protrusion 371, and the fixed protrusion 371 is provided with a The two movable bars 341 are slidably matched with the first guide groove 372 .

The first movable ring 37 contacts the ground and moves up to fit the fixed ring 34. At this time, the first guide groove 372 will cause the second movable bar 341 to move away from the positioning hole 22 along the diameter direction of the drill pipe 2. At this time, the first movable ring 37 is fixed. The coaxial fixed state of the circular ring 34 and the drill pipe 2 is released. Compared with the prior art, the first movable ring 37, the first guide groove 372 and the second movable bar 341 of the present invention allow the fixed circular ring 34 and the drill pipe to be fixed. The fixed state of 2 can be automatically released, thereby avoiding the situation that the fixed ring 34 will continue to move downward in the vertical direction when the fixed ring 34 is in contact with the ground due to insufficient manual control.

Referring to Figures 2, 7 and 10: the fixed ring 34 also includes a third movable bar 342. The third movable bar 342 is slidably disposed inside the fixed ring 34. The second movable bar 341 and the first movable bar 312 are equal in number and arranged at intervals. The sliding direction of the third movable bar 342 is parallel to the diameter direction of the fixed ring 34. The fixed protrusion 371 is provided with a second guide groove 373 that can slide with the third movable bar 342. The movable bar 342 is provided with a threaded hole 3421, the first movable bar 312 is fixedly provided with a fixed shaft 3122 that can threadally cooperate with the threaded hole 3421, and a third elastic connector is fixedly provided between the first movable bar 312 and the fixed frame 311. 3123.

The first movable ring 37 contacts the ground and moves up to fit with the fixed ring 34. At this time, the second guide groove 373 will make the third movable strip 342 approach the drill pipe 2 along the diameter direction of the drill pipe 2. When the bar 341 moves, the first movable bar 312 will be driven to move through the cooperation of the fixed shaft 3122 and the threaded hole 3421. The third elastic connector 3123 will be stretched at this time. When the first movable ring 37 is not in contact with the ground, the third movable bar 312 will move. The elastic connector 3123 restores its deformation and provides a pulling force to move the first movable bar 312 away from the drill pipe 2. Compared with the prior art, the third movable bar 342 of the present invention can drive the first movable bar 312 to move, thereby allowing the drum 33 to move completely. Entering into the pile foundation hole, the roller 33 is automatically brought into contact with the side wall of the pile foundation hole.

Referring to Figures 2, 7 and 10: the protection component 3 also includes a second movable ring 38. The second movable ring 38 is coaxially slidably disposed above the fixed ring 34. The second movable ring 38 and the fixed ring are A fourth elastic connecting member 381 is fixedly provided between 34 , and a magnetic member 374 that can anisotropically magnetically cooperate with the second movable ring 38 is fixedly provided at an upward end of the fixed protrusion 371 .

The upwardly moved first movable ring 37 will fix its position through the cooperation of the magnetic member 374 and the second movable ring 38. When the drill bit 1 is separated from the pile foundation hole in the vertical direction, the second movable ring 38 is controlled to move in the vertical direction. Move up a certain distance, the fourth elastic connecting member 381 is stretched, the position of the first movable ring 37 cannot be fixed and moves to the initial position under the action of the third elastic connecting member 3123, the second movable ring 38 is released, and the fourth The elastic connecting member 381 undergoes recovery deformation and provides a pulling force to move the second movable ring 38 to the initial position. Compared with the prior art, the magnetic member 374 and the second movable ring 38 of the present invention make the first movable ring 37 and the fixed ring The position between 34 can be fixed and released, so that the protective assembly 3 can be used multiple times.

Referring to Figures 1, 4 and 6, a method for drilling edge-supported foundation piles for house construction uses an edge-supported foundation pile drilling device for house construction, which includes the following steps:

S1. When the drill pipe 2 drives the drill bit 1 to rotate, it will also drive the drill bit 1 downward in the vertical direction into the ground to form a pile foundation hole. The protection component 3 will follow the drill bit 1 to move into the pile foundation hole. At this time, the sleeve 31 is fixed. Cooperating with the coaxial movement of the drill pipe 2, the drum 33 is in a position close to the axis of the fixed sleeve 31, and the fixed ring 34 is coaxially fixed with the drill pipe 2;

S2. When the fixed sleeve 31 enters the inside of the pile foundation hole and the fixed ring 34 is in contact with the ground, the fixed ring 34 can slide axially along the drill pipe 2, and the roller 33 is axially away from the fixed sleeve 31. The position of the center is in contact with the side wall of the pile foundation hole, and the fixing sleeve 31 and the drill pipe 2 are fixed radially;

S3. As the drill bit 1 continues to penetrate deep into the ground, the drum 33 performs circular motion around the axis of the drill pipe 2 and will also perform rotational motion, thereby continuously squeezing and reinforcing the top side wall of the pile foundation hole, thereby avoiding local collapse. .

Compared with the prior art, the roller 33 of the present invention rotates around the axis of the pile foundation hole to squeeze and reinforce the soil on the top side wall of the pile foundation hole. The cooperation of the movable frame 32 and the fixed sleeve 31 makes the roller 33 close to the pile foundation hole. The distance between the axes can be changed. The fixed sleeve 31 and the fixed ring 34 cooperate to make the roller 33 completely enter the inside of the pile foundation hole before performing a circular motion, thereby ensuring that the top of the pile foundation hole is ensured when the drill bit 1 performs drilling work. The entire side wall of the pile foundation hole will not be partially collapsed. At the same time, the roller 33 will not get stuck in the side wall at the top of the pile foundation hole when the drill bit 1 is drilling, and then it will not occur when the drill bit 1 is taken out after the drilling work is completed. Local collapse situation.

The above embodiments only express one or several implementation modes of the present invention, and their descriptions are relatively specific and detailed, but should not be construed as limiting the patent scope of the present invention. It should be noted that, for those of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the scope of protection of the patent of the present invention should be determined by the appended claims.

Claims (9)

1. The edge support type foundation pile drilling device for building construction comprises a drill bit (1), a drill rod (2) and a protection component (3), and is characterized in that the protection component (3) comprises a fixed sleeve (31), a movable frame (32), a roller (33) and a fixed ring (34); the fixed sleeve (31) is coaxially and movably sleeved on the drill rod (2); the movable frame (32) slides outside the fixed sleeve (31) along the radial direction of the fixed sleeve (31); the axis of the roller (33) is parallel to the fixed sleeve (31) and the roller (33) moves along with the movable frame (32); the fixed ring (34) is coaxially and fixedly sleeved on the drill rod (2), the fixed sleeve (31) is positioned between the drill bit (1) and the fixed ring (34), when the bottom surface of the fixed ring (34) is in contact with the ground, the fixed ring (34) can slide along the axial direction of the drill rod (2), the fixed sleeve (31) can rotate along with the drill rod (2), and the movable frame (32) moves in the direction away from the fixed sleeve (31); the fixed sleeve (31) also comprises a fixed frame (311) and a first movable strip (312); the quantity of mount (311) is three, three mount (311) evenly sets up around the axis of fixed sleeve (31), mount (311) are the U type that a horizontal pole and two longitudinal bars constitute, two longitudinal bars in mount (311) are arranged along the axis direction of fixed sleeve (31) and two longitudinal bars in mount (311) are towards keeping away from the direction extension of fixed sleeve (31), set up on the longitudinal bar in mount (311) can supply gliding recess (3111) of first movable strip (312), the slip direction of first movable strip (312) is parallel with the diameter direction of fixed sleeve (31), first movable strip (312) can slide to the outside of mount (311), set up through-hole (313) that can supply first movable strip (312) to pass on fixed sleeve (31), set up on drilling rod (2) can with first movable strip (312) sliding fit's first spout (21), the length direction of first spout (21) is parallel with the axis of mount (2), movable strip (32) sliding arrangement is inside fixed mount (311).

2. An edge-supported foundation pile drilling device for building construction according to claim 1, characterized in that the protection assembly (3) further comprises a movable rod (35) and a pull rope (36); the movable rod (35) can rotate and set up between two longitudinal rods of mount (311), the axis of movable rod (35) is parallel with the axis of fixed sleeve (31), movable frame (32) are the U type that a horizontal pole and two longitudinal rods constitute, two longitudinal rods in movable frame (32) set up towards the direction of keeping away from fixed sleeve (31), one end and movable rod (35) lateral wall fixed connection of stay cord (36), the other end and the horizontal pole fixed connection in movable frame (32) of stay cord (36), fixed be provided with first elastic connection spare (321) between horizontal pole in movable frame (32) and mount (311).

3. An edge-supported foundation pile drilling device for building construction according to claim 2, characterized in that the movable rod (35) further comprises a gear (351); the gear (351) is coaxially arranged at two ends of the movable rod (35) in a sliding mode, the gear (351) can synchronously rotate along with the movable rod (35), and the first movable strip (312) is fixedly provided with a rack (3121) which can be meshed with the gear (351).

4. An edge-supported foundation pile drilling device for building construction according to claim 3, characterized in that the movable rod (35) further comprises a clamping shaft (352) and a second elastic connecting piece (353); the coaxial slip of joint axle (352) sets up in the both ends of movable rod (35), joint hole (3511) that can supply joint axle (352) male are seted up in the axle center of gear (351), second elastic connection spare (353) are fixed to be set up between movable rod (35) and joint axle (352), first movable strip (312) are L type and the one end orientation of first movable strip (312) is close to the direction setting of fixed sleeve (31), second spout (322) are all seted up on two longitudinal rods in movable frame (32), the length direction of second spout (322) is parallel with the slip direction of movable frame (32), fixed being provided with on mount (311) can with second spout (322) sliding fit spacing arch (3112).

5. An edge-supported foundation pile drilling device for building construction according to claim 4, characterized in that two parallel second sliding grooves (322) are provided on each longitudinal bar in the movable frame (32).

6. An edge-supported foundation pile drilling device for building construction according to claim 5, characterized in that the protection assembly (3) further comprises a first movable ring (37); the inside second movable strip (341) that is provided with along fixed ring (34) radial direction of fixed ring (34), second movable strip (341) can run through the inside wall of fixed ring (34), set up on drilling rod (2) can supply second movable strip (341) male locating hole (22), and the quantity of locating hole (22) is three locating hole (22) evenly set up around the axis of drilling rod (2), and first movable ring (37) coaxial slip sets up in the below of fixed ring (34), and first movable ring (37) up one side is fixed to be provided with fixed protruding (371), set up on fixed protruding (371) can with second movable strip (341) sliding fit's first guide groove (372).

7. The edge-supported foundation pile drilling device for building construction according to claim 6, wherein the fixed ring (34) further comprises a third movable bar (342); the third movable strip (342) slides and sets up in the inside of fixed ring (34), second movable strip (341) and first movable strip (312) quantity are equal and the interval sets up, the slip direction of third movable strip (342) is parallel with the diameter direction of fixed ring (34), set up on fixed arch (371) can with third movable strip (342) sliding fit's second guiding groove (373), set up threaded hole (3421) on third movable strip (342), fixed axle (3122) that can with threaded hole (3421) screw-fit on first movable strip (312), fixed be provided with third elastic connection spare (3123) between first movable strip (312) and mount (311).

8. An edge-supported foundation pile drilling device for building construction according to claim 7, characterized in that the protection assembly (3) further comprises a second movable ring (38); the second movable ring (38) is coaxially and slidably arranged above the fixed circular ring (34), a fourth elastic connecting piece (381) is fixedly arranged between the second movable ring (38) and the fixed circular ring (34), and a magnetic piece (374) which can be in opposite magnetic fit with the second movable ring (38) is fixedly arranged at one upward end of the fixed protrusion (371).

9. An edge support type foundation pile drilling method for building construction, which adopts the edge support type foundation pile drilling device for building construction according to any one of claims 1-8, and is characterized by comprising the following steps:

s1, a drill rod (2) drives a drill bit (1) to rotate and simultaneously drives the drill bit (1) to downwards enter the ground along the vertical direction to form a pile foundation hole, a protection assembly (3) moves towards the inside of the pile foundation hole along with the drill bit (1), at the moment, a fixed sleeve (31) is coaxially and movably matched with the drill rod (2), a roller (33) is positioned at a position close to the axis of the fixed sleeve (31), and a fixed ring (34) is coaxially fixed with the drill rod (2);

s2, when the fixed sleeve (31) enters the pile foundation hole and the fixed ring (34) is in contact with the ground, the fixed ring (34) can axially slide along the drill rod (2), the roller (33) is positioned at a position far away from the axis of the fixed sleeve (31) and is in contact with the side wall of the pile foundation hole, and the fixed sleeve (31) and the drill rod (2) are radially fixed;

s3, along with the fact that the drill bit (1) continuously penetrates into the ground, the roller (33) performs circular motion around the axis of the drill rod (2) and simultaneously performs rotary motion, so that the top side wall of the pile foundation hole is continuously extruded and reinforced, and local collapse is avoided.