CN113047286B - Pile pulling device and pile pulling construction method - Google Patents

Abstract

The application relates to a pile pulling device and a pile pulling construction method, and belongs to the technical field of building construction. The pile cutting device comprises a soil loosening mechanism, a hoop used for being connected with the top of a pile and a cutting mechanism used for cutting off the pile, wherein the soil loosening mechanism comprises a sleeve used for being sleeved on the pile, a soil loosening piece and a driving piece used for driving the soil loosening piece to rotate; the piece that loosens the soil include with the coaxial and rotation of sleeve pipe ring and a plurality of drill bit of loosening the soil of connecting, the drill bit is located the circumference lateral wall that loosens the soil the ring and is loosened the soil the ring and keep away from sheathed tube side, the driving piece drive the drill bit rotates. Soil around the underground pile is loosened greatly through the soil loosening mechanism, so that the pile is pulled out from the ground more easily, and the pile is not easy to break when pulled out.

Description

Pile pulling device and pile pulling construction method

Technical Field

The application relates to the technical field of building construction, in particular to a pile pulling device and a pile pulling construction method.

Background

After the foundation pit supporting construction is finished, all various piles of the supporting foundation pit must be pulled out, so that firstly, the piles are prevented from being left underground, the environment underground soil body and water and soil are polluted, secondly, materials are recycled, and the construction cost is reduced.

In the related art, pile pulling is mostly carried out by pulling the top of a pile through a tractor, and the inventor thinks that the pile is easy to be damaged when being pulled out, the pile is easy to break from the middle, and the broken pile in the ground is difficult to be removed.

Disclosure of Invention

The application provides a pile pulling device and a pile pulling construction method, so that a pile is not easy to break when pulled out from the ground.

In a first aspect, the application provides a pile pulling device, adopts following technical scheme:

a pile pulling device comprises a soil loosening mechanism, a hoop used for being connected with the top of a pile and a cutting mechanism used for cutting off the pile, wherein the soil loosening mechanism comprises a sleeve used for being sleeved on the pile, a soil loosening piece and a driving piece used for driving the soil loosening piece to rotate;

the piece that loosens the soil include with the coaxial and rotation of sleeve pipe ring and a plurality of drill bit of loosening the soil of connecting, the drill bit is located the circumference lateral wall that loosens the soil the ring and is loosened the soil the ring and keep away from sheathed tube side, the driving piece drive the drill bit rotates.

Through adopting above-mentioned technical scheme, when pile pulling device used, earlier loosen the earth around the stake through loosening mechanism, fix the cuff at the top of stake again, be connected with the cuff through the tractor, make the stake extract from the underground, then cut the stake that will extract ground through cutting mechanism, extract the stake up after the cutting, so reciprocal, until the stake is whole to be pulled out, loose greatly through the earth around the stake that loosening mechanism will be underground, make the stake extract from the underground more easily, thereby be difficult to the fracture when making the stake extract.

When the piece that loosens the soil uses, establish the sleeve pipe box on the stake, push down sleeve pipe and the ring that loosens the soil through pressing equipment, start the driving piece afterwards, drive through the driving piece and loosen the soil the ring and rotate with the drill bit, the drill bit is with the earth contact around the stake, bores the earth around the stake through the drill bit and send, and the drill bit both rotates along with the ring that loosens the soil together under the drive of driving piece simultaneously, also rotates alone, makes the effect of loosening the soil of drill bit better.

Optionally, the driving piece is including locating sheathed tube main driving motor, driving medium and a plurality of vice driving motor, the driving medium is located loosen the soil the intra-annular, just main driving motor with the driving medium transmission is connected, and is a plurality of vice driving motor all locates to loosen the soil the intra-annular, and vice driving motor is connected with the drill bit transmission.

Through adopting above-mentioned technical scheme, when the piece that loosens the soil used, main driving motor drives the driving medium motion, and the driving medium drives the ring rotation that loosens the soil again for relative rotation takes place for the ring that loosens the soil and the sleeve pipe, vice driving motor drives the drill bit and rotates, makes the drill bit rotate alone on the ring that loosens the soil. When the soil loosening piece is used for loosening soil, the main driving motor can be started independently, the soil loosening ring can be rotated, the auxiliary driving motor can be started independently, the drill bit can be rotated, the main driving motor and the auxiliary driving motor can be started together, and the soil loosening ring and the drill bit can be rotated together.

Optionally, the outer ring of the soil loosening ring is connected with a guide ring, the guide ring is coaxially sleeved on the sleeve, a guide block is arranged on the inner ring of the guide ring, and a guide groove for the guide block to be embedded and slide is formed in the sleeve.

By adopting the technical scheme, the guide block of the guide ring is positioned in the guide groove, and the soil loosening ring is not easy to separate from the sleeve under the action of the guide block and the groove wall of the guide groove; meanwhile, the guide ring and the soil loosening ring are coaxially arranged, when the soil loosening ring rotates, the soil loosening ring is not prone to shifting from the sleeve, and the soil loosening ring and the sleeve are always coaxial.

Optionally, the mechanism that loosens the soil still includes the water injection subassembly, the water injection subassembly includes inlet tube and at least one outlet pipe of being connected with the water source, the sleeve pipe is provided with the aqua storage tank with advance water piping connection, loosen the soil the ring set up with the play water passageway of aqua storage tank intercommunication, the one end and the play water passageway intercommunication of outlet pipe, the other end stretches out the ring that loosens the soil.

By adopting the technical scheme, when the soil loosening member rotates, the water inlet pipe conveys water into the water storage tank, the water passes through the water storage tank and then enters the water outlet channel, and then enters the water outlet pipe, the water enters soil around the pile through the water outlet pipe to moisten the soil around the pile, so that the soil loosening member loosens soil more easily; soil and soil are mixed and become soft slurry after being stirred by the soil loosening piece, so that the soil loosening piece can move more smoothly along the length direction of the pile; in addition, after the drill bit is used for a long time, the temperature of the drill bit is high, the drill bit is cooled by water, the drill bit is not easy to damage, and the service life of the drill bit is prolonged.

Optionally, the soil loosening ring is provided with two limiting ring plates which are arranged oppositely, the two limiting ring plates form a limiting channel communicated with the water outlet channel, the limiting ring plates are connected with the sleeve, and the limiting channel is communicated with the water storage tank.

Through adopting above-mentioned technical scheme, the sleeve pipe with loosen the soil the ring and be connected the back, spacing ring board and bushing, make spacing passageway and exhalant canal intercommunication, spacing passageway communicates with the aqua storage tank again simultaneously, after water gets into the exhalant canal, through the aqua storage tank reentrant exhalant canal, get into the outlet pipe afterwards, during water enters into the earth around the stake through the outlet pipe, through the effect of spacing ring board, make aqua storage tank and exhalant canal be linked together for rivers in the sleeve pipe are gone into and are loosened the soil in the piece.

Optionally, the mechanism that loosens the soil still includes the thick liquid subassembly of taking out, take out thick liquid subassembly including set up in the sheathed tube take out thick liquid ring, defeated thick liquid pipe and with the pump that defeated thick liquid pipe is connected, the circumference lateral wall of taking out thick liquid ring has seted up a plurality of thick liquid mouths of advancing, the one end and the pump that takes out thick liquid of defeated thick liquid pipe are connected, and the other end is connected with the pump that takes out thick liquid.

By adopting the technical scheme, when the soil loosening member is used, water is injected around the pile firstly, the water and the soil are mixed to form slurry through the mixing of the soil loosening member, the slurry around the pile is sucked out through the slurry pump, so that the soil around the pile is cleaned, the slurry is sucked out in time, and the slurry is not easy to be condensed into the soil again; in addition, after the mud is sucked out, the obstruction of the mud is reduced, and the sleeve can be moved to the ground more easily.

Optionally, the slurry pumping ring is provided with a yielding groove for the guide ring to enter, and a sealing ring is arranged between the guide ring and the bottom of the yielding groove.

By adopting the technical scheme, after the slurry pumping ring is connected with the sleeve, the guide ring enters the abdicating groove, so that the guide ring is not easy to separate from the sleeve; in addition, through the effect of sealing washer, make the difficult earth get into between guide ring and the sleeve pipe, make the guide ring rotate more smoothly on the sleeve pipe.

Optionally, the hoop includes semi-rings that are articulated to each other, the one end of semi-ring far away from articulated department is provided with the connecting block, two the connecting block passes through the screw connection.

By adopting the technical scheme, when the hoop is used, the two half rings are buckled on the pile, and then the connecting blocks are connected through the screws, so that the hoop is hooped on the pile.

Optionally, the cutting mechanism includes a base, a power motor and a blade, the power motor and the blade are arranged on the base, and the power motor is in transmission connection with the blade.

By adopting the technical scheme, when the pile is pulled out of the ground, the power motor is started, and the blade is driven by the power motor to cut the pile.

In a second aspect, the following technical scheme is adopted in the construction method for pile pulling provided by the application.

A construction method for pile pulling comprises the following specific steps:

s1, sleeving the sleeve and the loosening ring on the pile, and connecting the pressing equipment with the pressing column;

s2, starting the pressing device, the main driving motor and the auxiliary driving motor, and rotating the soil loosening ring and the drill bit while pressing the soil loosening member down along the pile;

s3, pumping water to the water storage tank through the water pump, and enabling the water to flow out of the water outlet pipe;

s4, starting a slurry pump, and pumping out the slurry around the pile;

s5, after soil around the underground pile is loosened, lifting the soil loosening mechanism through pressing equipment, and taking the soil loosening mechanism down from the pile;

s6, hooping the hoop on the top of the pile, and connecting the hoop with a tractor; starting a tractor to pull the pile out of the ground;

s7, cutting off the pulled pile through a cutting mechanism after the pile is pulled out of the ground by 3 m;

and S8, repeating the steps S6 and S7 until all the piles are pulled out of the ground.

In summary, the present application includes at least one of the following beneficial technical effects:

1. soil around the underground pile is loosened greatly through the soil loosening mechanism, so that the pile is pulled out from the ground more easily, and the pile is not easy to break when pulled out;

2. water is injected into soil around the pile through the water outlet pipe to moisten the soil around the pile, so that the soil loosening part loosens soil more easily;

3. the mud around the pile is sucked out through the pump, so that the soil around the pile is cleaned, the mud is sucked out in time, and the mud is not easy to be condensed into the soil again.

Drawings

Fig. 1 is a schematic overall structure diagram of a pile pulling device according to an embodiment of the application.

Fig. 2 is a schematic structural view of a ripping mechanism according to an embodiment of the present application.

Fig. 3 is a partial cross-sectional view of a ripping mechanism of an embodiment of the present application.

Fig. 4 is a schematic structural diagram of the secondary driving motor on the loosening ring according to the embodiment of the present application.

Fig. 5 is a schematic structural view of a retaining ring plate on a loosening ring according to an embodiment of the present disclosure.

Fig. 6 is an enlarged view of a in fig. 3.

FIG. 7 is a schematic structural diagram of a slurry extraction assembly according to an embodiment of the present application.

Fig. 8 is a schematic structural view of a ferrule according to an embodiment of the present application.

Fig. 9 is a schematic structural diagram of a cutting mechanism according to an embodiment of the present application.

Description of reference numerals: 1. a soil loosening mechanism; 11. a sleeve; 111. a guide groove; 112. a ring groove; 113. a placement groove; 12. a scarification piece; 121. a soil loosening ring; 122. a drill bit; 123. mounting grooves; 124. a motor slot; 125. a water outlet channel; 126. a slurry containing groove; 13. a drive member; 131. a drive motor; 132. a transmission member; 133. a driving gear; 134. a driven gear; 135. a secondary drive motor; 14. pressing the column; 15. a water injection assembly; 151. a water inlet pipe; 152. a water outlet pipe; 153. a water storage tank; 154. a water storage tank; 155. inserting the slots; 156. a positioning ring groove; 158. a water through hole; 16. a slurry pumping assembly; 161. slurry pumping ring; 162. a slurry pumping pipe; 163. a pulp inlet; 164. a yielding groove; 165. a seal ring; 2. a ferrule; 21. a half ring; 22. connecting blocks; 3. a cutting mechanism; 31. a base; 32. a power motor; 33. a blade; 4. a guide ring; 41. a guide block; 5. a limit ring plate; 51. a limiting channel; 52. positioning the ring block; 6. and (6) sealing rings.

Detailed Description

The present application is described in further detail below with reference to figures 1-9.

The embodiment of the application discloses pile pulling device.

Referring to fig. 1, pile pulling device includes loosening mechanism 1, cuff 2 and cutting mechanism 3, and when pile pulling device used, earlier loosens the earth around the stake through loosening mechanism 1, fixes cuff 2 at the top of stake again, is connected with cuff 2 through the tractor, makes the stake extract from the underground, then cuts the stake that will extract ground through cutting mechanism 3, extracts the stake up again after cutting, and is reciprocal so until the stake is all pulled out.

Referring to fig. 1 and 2, the soil loosening mechanism 1 includes a sleeve 11, a soil loosening element 12 and a driving element 13, the sleeve 11 and the soil loosening element 12 are both sleeved on the pile, the soil loosening element 12 is rotatably connected with the sleeve 11, and the soil loosening element 12 is driven by the driving element 13 to rotate.

The side of the sleeve 11 far away from the loosening element 12 is provided with a plurality of pressing columns 14, the plurality of pressing columns 14 are arranged along the circumference of the sleeve 11, and the sleeve 11 and the loosening element 12 are moved on the pile to the ground by acting on the pressing columns 14 through a pressing device, wherein the pressing device can be a pile driver.

The soil loosening member 12 comprises a soil loosening ring 121 and a plurality of drill bits 122, the soil loosening ring 121 is coaxially connected with the sleeve 11, the drill bits 122 are respectively arranged in two parts, one part of the drill bits 122 is arranged on the circumferential side wall of the soil loosening ring 121 in a radial direction at intervals, and the other part of the drill bits is arranged on the side face, far away from the sleeve 11, of the soil loosening ring 121.

Referring to fig. 3, the driving member 13 includes a main driving motor 131 and a transmission member 132, the main driving motor 131 is disposed on the casing 11, a placing groove 113 is formed in a side surface of the casing 11 close to the loosening ring 121, the main driving motor 131 is connected to a groove wall of the placing groove 113 through a screw, and an output shaft of the main driving motor 131 extends out of the placing groove 113 and is in transmission connection with the transmission member 132.

The transmission member 132 includes a driving gear 133 and a driven gear 134, the driving gear 133 is fixedly sleeved on an output shaft of the main driving motor 131, the driven gear 134 is coaxial and fixedly connected with the loosening ring 121, and the driving gear 133 is engaged with the driven gear 134. After the main driving motor 131 is started, the main driving motor 131 drives the driving gear 133 to rotate, the driving gear 133 drives the driven gear 134 to rotate, and the driven gear 134 drives the soil loosening ring 121 to rotate, so that the soil loosening ring 121 and the sleeve 11 rotate relatively.

In order to make the structure between the soil loosening ring 121 and the sleeve 11 more compact, a mounting groove 123 for mounting the driven gear 134 is opened on the side surface of the soil loosening ring 121 close to the sleeve 11, the mounting groove 123 is an annular groove coaxial with the driven gear 134, the driven gear 134 is fixedly mounted in the mounting groove 123, and the driving gear 133 is also located in the mounting groove 123.

Referring to fig. 3 and 4, the driving member 13 further includes a plurality of auxiliary driving motors 135, the plurality of auxiliary driving motors 135 correspond to the plurality of drill bits 122 one by one, the soil loosening ring 121 is provided with a motor groove 124 for the auxiliary driving motors 135 to be placed, the auxiliary driving motors 135 are fixedly connected with the motor groove 124 through screws, an output shaft of the auxiliary driving motor 135 is coaxial and fixedly connected with the drill bits 122, and the drill bits 122 are driven by the auxiliary driving motors 135.

When the soil loosening element 12 is used, the soil loosening ring 121 is driven to rotate through the main driving motor 131, the auxiliary driving motor 135 drives the drill bit 122 to rotate, so that the drill bit 122 rotates with the axis of the soil loosening ring 121 as a central axis along with the soil loosening ring 121 and the axis of the drill bit 122 as the central axis, and the soil around the pile is more easily loosened by the drill bit 122.

The outer lane of the ring 121 that loosens the soil has guide ring 4 through bolted connection, and guide ring 4 is kept away from the one end of the ring 121 that loosens the soil and is protruding loose the soil ring 121 and overlap and establish on sleeve 11, through the effect of guide ring 4, makes the ring 121 that loosens the soil be connected more stably with sleeve 11. In order to reduce the friction between the guide ring 4 and the sleeve 11, the inner diameter of the guide ring 4 is slightly larger than the outer diameter of the sleeve 11, so that a gap is formed between the guide ring 4 and the sleeve 11, and the guide ring 4 is not easy to rub against the sleeve 11.

In order to make the connection between the loosening ring 121 and the sleeve 11 more stable, the guide ring 4 similar to the outer ring is also arranged on the inner ring of the loosening ring 121, and the structure and the connection mode of the guide ring 4 are the same as those of the guide ring 4 on the outer ring.

The guide block 41 is integrally provided on the side surface of the guide ring 4 close to the outer ring of the sleeve 11, the guide block 41 may be in the form of a block or a ring, and the guide block 41 is in the form of a ring to increase the contact area between the guide ring 4 and the sleeve 11. The outer side wall of the sleeve 11 is provided with a guide groove 111 into which the guide block 41 is fitted, and the guide groove 111 is annular and coaxial with the sleeve 11. Because the guide block 41 slides in the guide groove 111 when the scarification ring 121 rotates, in order to make the guide block 41 slide more smoothly in the guide groove 111, the side of the guide block 41 away from the guide ring 4 is an arc surface, and the bottom of the guide groove 111 is also an arc surface.

Referring to fig. 3 and 5, the soil loosening mechanism 1 further includes a water injection assembly 15, the water injection assembly 15 includes a water inlet pipe 151 and at least one water outlet pipe 152, the water inlet pipe 151 is disposed in the pressing column 14 in a penetrating manner, and one end of the water inlet pipe 151 extends out of the pressing column 14 to be connected with a water source, the water source may be a water pump or a water faucet, and all that is needed is to provide water for the water inlet pipe 151.

The side of the sleeve 11 close to the soil loosening ring 121 is provided with a ring groove 112, a water storage tank 153 is arranged in the ring groove 112, a water storage tank 154 is arranged in the water storage tank 153, and one end of the water inlet pipe 151, which is far away from a water source, is connected with the water storage tank 153, so that the water inlet pipe 151 conveys water for the water storage tank 153.

The side of the soil loosening ring 121 close to the sleeve 11 is provided with two oppositely arranged limiting ring plates 5, and a limiting channel 51 for water flow to pass through is arranged between the two limiting ring plates 5. The soil loosening ring 121 is internally provided with a water outlet channel 125 for water to pass through, and the water outlet channel 125 is communicated with the limiting channel 51, so that water in the limiting channel 51 can flow into the water outlet channel 125.

Referring to fig. 3 and 6, after the sleeve 11 is connected to the scarification ring 121, the limit ring plate 5 is connected to the water storage tank 153. Wherein, the water storage tank 153 is provided with an insertion groove 155 for inserting the limit ring plate 5, and the water storage tank 153 is provided with a water through hole 158 for water to enter the limit passage 51. In addition, in order to firmly connect the limit ring plate 5 with the water storage tank 153, a set of opposite groove walls of the insertion groove 155 is further provided with a positioning ring groove 156, a set of opposite groove walls of the limit ring plate 5 are all provided with positioning ring blocks 52 embedded into the positioning ring groove 156, the side surface of the positioning ring block 52 far away from the limit ring plate 5 is an arc surface, and the bottom of the positioning ring groove 156 is also an arc surface. In addition, the cartridge groove 155 is also provided with a sealing ring 6, the limiting ring plate 5 extrudes the sealing ring 6 in the cartridge groove 155, and water is not easy to leak out from the connection part between the limiting ring plate 5 and the water storage tank 153 under the action of the sealing ring 6.

The water outlet pipe 152 radially wears to locate in the ring 121 that loosens the soil, and the one end and the play water channel 125 of water outlet pipe 152 are linked together, and the other end stretches out the ring 121 that loosens the soil, and the water outlet pipe 152 can be one, also can be a plurality of, for the water yield that improves the ring 121 that loosens the soil, and the water outlet pipe 152 is provided with a plurality ofly in this embodiment, and a plurality of water outlet pipes 152 set up with the drill bit 122 one-to-one of the circumference lateral wall of ring 121 that loosens the soil to the water outlet pipe 152 is located the top of drill bit 122. To promote faster flow in the outlet pipe 152, the space of the outlet channel 125 narrows from the end away from the outlet pipe 152 to the end near the outlet pipe 152.

Referring to fig. 7, the soil loosening mechanism 1 further includes a slurry pumping assembly 16, the slurry pumping assembly 16 includes a slurry pumping ring 161 and a slurry pumping pipe 162, the slurry pumping ring 161 is fixedly sleeved on the casing 11 through screws, a plurality of slurry inlets 163 are formed in the circumferential side wall of the slurry pumping ring 161, and the slurry inlets 163 are in a form of a flared opening with a small inner part and a large outer part, so that slurry around the casing 11 can enter the slurry inlets 163 more easily.

The casing 11 is internally provided with a slurry containing groove 126, and the slurry containing groove 126 is communicated with a plurality of slurry inlets 163, so that slurry enters the slurry containing groove 126 from the slurry inlets 163. The slurry pumping pipe 162 is inserted into the slurry containing groove 126, and one end of the slurry pumping pipe 162 far away from the slurry pumping ring 161 is connected with a slurry pumping pump, so that the slurry in the slurry containing groove 126 is pumped out through the slurry pumping pump.

Slurry pumping ring 161 is provided with a yielding groove 164 for inserting a guide ring 4 of the outer ring of soil loosening ring 121, the guide ring 4 abuts against the bottom of the yielding groove 164, a sealing ring 165 is further arranged between the guide ring 4 and the bottom of the yielding groove 164, and the sealing performance between the guide ring 4 and the slurry pumping ring 161 is improved through the sealing ring 165.

Referring to fig. 8, the hoop 2 comprises two half rings 21 hinged to each other, a connecting block 22 is arranged at one end of each half ring 21 away from the hinged position, and the connecting blocks 22 of the two half rings 21 are fixedly connected through screws.

Referring to fig. 9, the cutting mechanism 3 includes a base 31, a power motor 32 disposed on the base 31, and a blade 33 in transmission connection with the power motor 32, and the blade 33 is driven by the power motor 32 to rotate, so that the blade 33 cuts and pulls out the pile on the ground.

The embodiment of the application also discloses a pile pulling construction method, which comprises the following specific steps:

s1, sleeving the sleeve 11 and the soil loosening ring 121 on the pile, and connecting the pressing equipment with the pressing column 14;

s2, starting the pressing device, the main driving motor 131, and the sub driving motor 135, and rotating the loosening ring 121 and the bit 122 while pressing the loosening element 12 down the pile;

s3, pumping water to the water storage tank 154 through a water pump, and leading the water to flow out of the water outlet pipe 152;

s4, starting a slurry pump, and pumping out slurry around the pile;

s5, after soil around the underground pile is loosened, lifting the soil loosening mechanism 1 through pressing equipment, and taking the soil loosening mechanism 1 down from the pile;

s6, hooping the hoop 2 at the top of the pile, and connecting the hoop 2 through a tractor; starting a tractor to pull the pile out of the ground;

s7, cutting off the pulled pile through the cutting mechanism 3 after the pile is pulled out of the ground by 3 m;

and S8, repeating the steps S6 and S7 until all the piles are pulled out of the ground.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (3)

1. The utility model provides a pile pulling device which characterized in that: the pile driving device comprises a soil loosening mechanism (1), a hoop (2) used for being connected with the top of a pile and a cutting mechanism (3) used for cutting off the pile, wherein the soil loosening mechanism (1) comprises a sleeve (11) used for being sleeved on the pile, a soil loosening part (12) and a driving part (13) used for driving the soil loosening part (12) to rotate, a plurality of pressing columns (14) are arranged on the side surface, away from the soil loosening part (12), of the sleeve (11), the pressing columns (14) are arranged along the circumferential direction of the sleeve (11), and pressing equipment acts on the pressing columns (14) to enable the sleeve (11) and the soil loosening part (12) to move towards the ground on the pile;

the soil loosening piece (12) comprises a soil loosening ring (121) and a plurality of drill bits (122), the soil loosening ring (121) is coaxial with the sleeve (11) and is connected with the sleeve in a rotating mode, the drill bits (122) are arranged on the circumferential side wall of the soil loosening ring (121) and the side face, far away from the sleeve (11), of the soil loosening ring (121), and the driving piece (13) drives the drill bits (122) to rotate;

the outer ring of the soil loosening ring (121) is connected with a guide ring (4), the guide ring (4) is coaxially sleeved on the sleeve (11), a guide block (41) is arranged on the inner ring of the guide ring (4), and the sleeve (11) is provided with a guide groove (111) for the guide block (41) to be embedded and to slide;

the soil loosening mechanism (1) further comprises a slurry pumping assembly (16), the slurry pumping assembly (16) comprises a slurry pumping ring (161) arranged on the sleeve (11), a slurry pumping pipe (162) and a slurry pumping pump connected with the slurry pumping pipe (162), a plurality of slurry inlet openings (163) are formed in the circumferential side wall of the slurry pumping ring (161), one end of the slurry pumping pipe (162) is communicated with the slurry inlet openings (163), and the other end of the slurry pumping pipe is connected with the slurry pumping pump;

the slurry pumping ring (161) is provided with a yielding groove (164) for the guide ring (4) to enter, and a sealing ring (165) is arranged between the guide ring (4) and the bottom of the yielding groove (164);

the driving piece (13) comprises a main driving motor (131), a transmission piece (132) and a plurality of auxiliary driving motors (135), the main driving motor (131), the transmission piece (132) and the plurality of auxiliary driving motors (135) are arranged in the sleeve (11), the transmission piece (132) is arranged in the soil loosening ring (121), the main driving motor (131) is in transmission connection with the transmission piece (132), the plurality of auxiliary driving motors (135) are arranged in the soil loosening ring (121), and the auxiliary driving motors (135) are in transmission connection with the drill bit (122);

the soil loosening mechanism (1) further comprises a water injection assembly (15), the water injection assembly (15) comprises a water inlet pipe (151) connected with a water source and at least one water outlet pipe (152), the sleeve (11) is provided with a water storage tank (154) connected with the water inlet pipe (151), the soil loosening ring (121) is provided with a water outlet channel (125) communicated with the water storage tank (154), one end of the water outlet pipe (152) is communicated with the water outlet channel (125), and the other end of the water outlet pipe extends out of the soil loosening ring (121);

the soil loosening ring (121) is provided with two limiting ring plates (5) which are arranged oppositely, a limiting channel (51) communicated with the water outlet channel (125) is formed by the two limiting ring plates (5), the limiting ring plates (5) are connected with the sleeve (11), and the limiting channel (51) is communicated with the water storage groove (154);

the cutting mechanism (3) comprises a base (31), a power motor (32) and a blade (33), wherein the power motor (32) and the blade (33) are arranged on the base (31), and the power motor (32) is in transmission connection with the blade (33).

2. A pile pulling apparatus according to claim 1, wherein: the hoop (2) comprises semi-rings (21) which are hinged to each other, one ends, far away from the hinged position, of the semi-rings (21) are provided with connecting blocks (22), and the two connecting blocks (22) are connected through screws.

3. A pile pulling construction method is characterized in that: the construction method adopts the pile pulling device as claimed in claim 1 or 2, and comprises the following specific steps:

s1, sleeving the sleeve (11) and the soil loosening ring (121) on the pile, and connecting the pressing equipment with the pressing column (14);

s2, starting the pressing device, the main driving motor (131) and the auxiliary driving motor (135), and rotating the soil loosening ring (121) and the drill bit (122) while pressing the soil loosening piece (12) down along the pile;

s3, pumping water to the water storage tank (154) through a water pump, and enabling the water to flow out of the water outlet pipe (152);

s4, starting a slurry pump, and pumping out the slurry around the pile;

s5, after soil around the underground pile is loosened, lifting the soil loosening mechanism (1) through pressing equipment, and taking the soil loosening mechanism down from the pile;

s6, hooping the hoop (2) at the top of the pile, and connecting the hoop (2) through a tractor; starting a tractor to pull the pile out of the ground;

s7, cutting off the pulled pile through the cutting mechanism (3) after the pile is pulled out of the ground by 3 m;

and S8, repeating the steps S6 and S7 until all the piles are pulled out of the ground.

Images