Noiseless self-balancing pile head breaking tool and using method thereof

Abstract

The invention discloses a noiseless self-balancing pile head breaking tool and a using method thereof. The pile head breaking tool comprises a traction piece, a pile casing piece, a top plate piece and a power lifting piece. The traction piece is arranged on the outer side of the circumference of the pile casing piece, and the top end of the traction piece is connected with the top plate piece; the top plate piece is located above the pile casing piece, the power lifting piece is arranged between the top plate piece and the top end of the pile casing piece, and the power lifting piece stretches and pulls the traction piece and the solidified concrete above the traction piece through the top plate piece. The using method comprises the following steps that S1, the traction piece and the reserved steel bar are bound and connected; s2, a pile casing part is placed; s3, pouring operation is carried out; s4, girdling operation is conducted on the peripheral side wall of the primary pile body; s5, a top plate piece and a power lifting piece are installed; s6, the power lifting piece drives the pile head part and the pile body part to be separated from the girdling position; and S7, the pile casing part and the solidified concrete in the pile casing part are cut off, and a finished pile body is obtained. The problems that in existing pile foundation construction, in the pile head breaking process, consumed time is long, the labor cost is high, reinforcing steel bars are prone to being damaged, and the construction environment is severe are solved.

Description

Technical Field

[0001] The invention relates to the field of construction engineering, and in particular to a noiseless self-balancing pile head breaking tool and a use method thereof. Background Art

[0002] In construction projects, bored cast-in-place piles are a common means of foundation reinforcement. The pile head part needs to be a certain distance higher than the design elevation during the pouring process to ensure that the concrete quality strength of the pile head at the design elevation meets the requirements; and in the production process, the part of the pile head that is higher than the design elevation needs to be chiseled off in subsequent processes.

[0003] In the prior art, construction workers usually use pneumatic picks or impact drills to partially break the pile head. This operation is time-consuming, has high labor costs, is easy to damage the embedded steel bars, is noisy, and has a harsh construction environment. Therefore, it is particularly important to develop a tool that can quickly and non-destructively break the pile head. Summary of the invention

[0004] The purpose of the present invention is to provide a noiseless self-balancing pile head breaking tool and a method of using the same, aiming to solve the problems of long time consumption, high labor cost, easy damage to steel bars, and harsh construction environment in the pile head breaking process in the existing pile foundation construction; it innovatively uses a hydraulic jack to pull upward the L-shaped steel bars and annular steel bars pre-buried in the preliminary pile body, and uses the bonding force between the steel bars and concrete and the rigidity of the steel bars themselves to cause cracks in the surrounding concrete and eventually separate, thereby achieving rapid, non-destructive, and environmentally friendly breaking operations of the preliminary pile body.

[0005] In order to achieve the above object, the technical solution of the present invention is: A noiseless self-balancing pile head breaking tool, the pile head breaking tool comprises a pulling piece, a casing piece, a top plate piece, and a power lifting piece; the casing piece is in the shape of a hollow tube arranged longitudinally; the pulling piece is arranged on the outer side of the circumference of the casing piece, and the top end of the pulling piece is connected to the top plate piece; the top plate piece is located above the casing piece, and the power lifting piece is arranged between the top plate piece and the top end of the casing piece, the bottom end of the power lifting piece contacts with the solidified concrete cast inside the casing piece and realizes bottom support, the top end of the power lifting piece contacts with the top plate piece and stretches and pulls the pulling piece and the solidified concrete above the pulling piece through the top plate piece.

[0006] Furthermore, the pulling member is composed of a plurality of L-shaped steel bars and a plurality of annular steel bars fixedly connected; the plurality of L-shaped steel bars are arranged at equal intervals along the circumferential direction of the casing member, the L-shaped steel bars are integrally formed by a vertical section and a horizontal section, the vertical section of the L-shaped steel bar is in contact with the side wall of the casing member and the length direction of the vertical section is consistent with the axial direction of the casing member, the top ends of the vertical sections of the plurality of L-shaped steel bars are detachably connected to the top plate member; the horizontal section of the L-shaped steel bar extends in a direction away from the axis of the casing member and the length direction of the horizontal section is consistent with the radial direction of the casing member.

[0007] Furthermore, the plurality of annular steel bars are sleeved outside the vertical sections of the plurality of L-shaped steel bars, the diameters of the plurality of annular steel bars are successively increased and coaxially arranged, and the bottom ends of the plurality of annular steel bars are welded to the upper ends of the horizontal sections of the L-shaped steel bars.

[0008] Furthermore, the top plate member includes a load-bearing plate, a fixing rod, and a double-headed screw sleeve; the load-bearing plate is in the shape of a circular plate, and a plurality of fixing rods are welded to the bottom end of the load-bearing plate, and the plurality of fixing rods are arranged corresponding to the vertical sections of a plurality of L-shaped steel bars; the side wall at the bottom end of the fixing rod and the side wall at the top end of the vertical section of the L-shaped steel bar are both provided with threads and are threadedly connected to the two ends of the double-headed screw sleeve through threads.

[0009] Furthermore, a reinforcement plate is welded between the vertical sections of adjacent L-shaped steel bars. The reinforcement plate is arranged in an arc shape and the curvature of the inner wall of the reinforcement plate is adapted to the curvature of the outer wall of the casing member. A guide plate is fixedly arranged on the side wall of the casing member. The guide plate is curved and arranged along the circumferential direction of the casing member. The guide plate is located above the reinforcement plate, and the bottom end face of the guide plate is an inclined structure that gradually inclines upward from one end to the other end; a wedge block is fixedly connected to the top end of the reinforcement plate, and the top end face of the wedge block is adapted to the inclined structure of the bottom end of the guide plate and contacts each other.

[0010] Furthermore, a reducing structure is provided on the side wall of the casing member and the outer diameter of the bottom end of the casing member is reduced by the reducing structure. The top end of the vertical section of the L-shaped steel bar contacts the top side wall of the casing member, and the bottom end of the vertical section of the L-shaped steel bar is inclined along the reducing structure of the casing member and the bottom end of the inclined vertical section contacts the outer side wall of the casing member after the reduction.

[0011] Furthermore, the power lifting component is a hydraulic jack.

[0012] Furthermore, the bottom end height of the sleeve member is lower than the bottom end height of the pulling member.

[0013] A method for using a noiseless self-balancing pile head breaking tool comprises the following steps: S1. Weld the L-shaped steel bars to the annular steel bars, and bind and connect the annular steel bars to the reserved steel bars in the pile mold at the designed height of the finished pile body; S2. placing a casing piece between the vertical sections of a plurality of L-shaped steel bars, wherein the casing piece is clamped and positioned or bound by a plurality of L-shaped steel bars; S3, extending the pouring pipe into the casing to perform concrete slurry pouring operation, so that the concrete slurry enters the pile body mold until the concrete slurry reaches a preset pouring height; S4, after the concrete slurry solidifies, a preliminary pile body is formed, the pile body mold is removed, and a circumferential cutting operation is performed on the outer peripheral side wall of the preliminary pile body at the height of the horizontal section of the L-shaped steel bar; S5. After the ring cutting operation, a top plate is connected to the top of the vertical section of the L-shaped steel bar, and then a power lifting member is placed between the casing member and the top plate member, the bottom end of the power lifting member contacts the top of the solidified concrete in the casing member, and the top end of the power lifting member contacts the top plate member; S6, the power lifting member is raised, the top plate member and the pulling member move upward together and drive the pile head part above the pulling member and the pile body part below the pulling member to separate from the ring cutting position; S7, after the separated pile head part is removed, the casing part and the solidified concrete in the casing part are cut off at the top of the pile body part to obtain a finished pile body.

[0014] Furthermore, in the step S1, a PVC pipe is sleeved outside the reserved steel bars in the pile body mold and is bound and connected to the annular steel bars through the PVC pipe.

[0015] Compared with the prior art, the present invention has the following advantages and positive effects: 1. The present invention abandons traditional destructive methods such as impact drilling or blasting, and instead adopts the principle of mechanical pulling. Through the pre-buried L-shaped steel bars and the annular steel bar reinforcement structure thereon, combined with the jack system, the non-destructive or low-destructive separation of the pile head is achieved; the tool can quickly destroy and separate the concrete around the pile head, improve the construction efficiency, and significantly shorten the construction time; in terms of economy, it effectively reduces labor costs and maintenance costs, and improves the economic benefits of pile construction operations.

[0016] 2. The present invention utilizes the interaction force between steel bars and concrete to perform breaking operations, thereby avoiding direct impact and damage to the pre-buried structural steel bars in the pile body, protecting the integrity and performance of the structural steel bars, and effectively improving the construction quality of the pile body; at the same time, it reduces dust and noise pollution during the construction process, which is in line with the concept of green construction.

[0017] 3. The present invention increases the contact area between the pulling member and the concrete of the pile head by arranging annular steel bars on the horizontal section of the L-shaped steel bars, thereby significantly improving the bonding force between the steel bars and the concrete and the overall pulling effect, and ensuring the stability and safety during the pulling process; at the same time, the present invention limits the lateral deformation of the concrete in the casing by introducing casing parts, provides a stable support platform for the hydraulic jack, and further enhances the overall performance of the pulling system.

[0018] 4. All components of the present invention (L-shaped steel bar assembly, annular steel bar reinforcement structure, circular casing, jack system) can be modularly designed and adjusted according to specific engineering requirements, such as changing the size of the L-shaped steel bar, adjusting the number and spacing of the annular steel bars, optimizing the diameter and height of the circular casing, etc.; so that it can meet the pile head partial breaking operation of all pile construction operations; it effectively solves many problems existing in traditional pile head breaking methods and has broad application prospects and market value. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 It is a structural schematic diagram of the pile head breaking tool in Example 1; Figure 2 It is the main structural diagram of the pile head breaking tool in Example 2; Figure 3 It is a cross-sectional structural diagram of the pile head breaking tool in Example 3; Figure 4 Construction process of pile head breaking tools Figure 1 ; Figure 5 Construction process of pile head breaking tools Figure 2 ; Figure 6 Construction process of pile head breaking tools Figure 3 ; Figure 7 Construction process of pile head breaking tools Figure 4 ; Figure 8 Construction process of pile head breaking tools Figure 5 ; Fig. 9 Construction process of pile head breaking tools Figure 6 . DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work, any modifications, equivalent substitutions, improvements, etc., should be included in the protection scope of the present invention.

[0022] Embodiment 1, as Figure 1 As shown, this embodiment discloses a noiseless self-balancing pile head breaking tool, the pile head breaking tool comprises a pulling member, a casing member 1, a top plate member, and a hydraulic jack 7; The casing member 1 is in the shape of a hollow tube arranged longitudinally; the casing member 1 is made of PVC material, which is pre-buried in concrete, with the top end slightly higher than the upper surface of the concrete, and the bottom end lower than the upper surface of the pile body after breaking. It is mainly used to limit the lateral deformation of the concrete in the casing member and transmit the reaction force to the pile body, ensuring that the concrete in the casing member maintains structural integrity during the pulling process, providing a stable support platform for the jack.

[0023] The pulling member is composed of a plurality of L-shaped steel bars 2 and a plurality of annular steel bars 3 fixedly connected; the plurality of L-shaped steel bars 2 are arranged at equal intervals along the circumferential direction of the casing member 1, and the L-shaped steel bars 2 are integrally formed by a vertical section 21 and a horizontal section 22, the vertical section 21 of the L-shaped steel bar is in contact with the side wall of the casing member 1 and the length direction of the vertical section 21 is consistent with the axial direction of the casing member 1, and the top ends of the vertical sections 21 of the plurality of L-shaped steel bars are detachably connected to the top plate member; the bottom end of the vertical section 21 of the L-shaped steel bar is connected to one end of the horizontal section 22, and the other end of the horizontal section 22 extends in a direction away from the axis of the casing member 1 and the length direction of the horizontal section 22 is consistent with the radial direction of the casing member 1.

[0024] During the pouring operation, the horizontal section and part of the vertical section of the L-shaped steel bar are embedded in the concrete to form a strong bond with the concrete. The top of the vertical section of the L-shaped steel bar is exposed above the concrete surface to facilitate mechanical connection with the top plate.

[0025] The plurality of annular steel bars 3 are sleeved on the outside of the vertical sections 21 of the plurality of L-shaped steel bars, the diameters of the plurality of annular steel bars 3 are successively increased and coaxially arranged, and the bottom ends of the plurality of annular steel bars 3 are welded to the upper end of the horizontal section 22 of the L-shaped steel bar.

[0026] Three or more ring steel bars can be set according to the pile diameter and the concrete tensile limit value to enhance the bond between the steel bars and the concrete, expand the damage area of ​​the concrete, and improve the overall stability and efficiency during the pulling process.

[0027] The top plate member includes a load-bearing plate 4, a fixing rod 5, and a double-headed screw sleeve 6; the load-bearing plate 4 is in the shape of a circular plate, and a plurality of fixing rods 5 are welded to the bottom end of the load-bearing plate 4, and the plurality of fixing rods 5 are arranged corresponding to the vertical sections 21 of the plurality of L-shaped steel bars; the side walls at the bottom ends of the fixing rods 5 and the side walls at the top ends of the vertical sections 21 of the L-shaped steel bars are both provided with threads and are threadedly connected to the two ends of the double-headed screw sleeve 6 through threads.

[0028] The bearing plate 4 is located above the casing member 1, and the hydraulic jack 7 is arranged between the bearing plate 4 and the top of the casing member 1. The bottom end of the hydraulic jack 7 contacts the solidified concrete cast inside the casing member 1 and realizes bottom support. The top end of the hydraulic jack 7 contacts the bearing plate 4 and stretches and pulls the pulling member and the solidified concrete above the pulling member through the fixed rod 5.

[0029] In this solution, during pouring, the pulling piece and casing piece are directly embedded in the concrete, and then the hydraulic jack and the top plate are used to pull the pulling piece upward. Under the power of the hydraulic jack, the pulling piece and the concrete above the pulling piece are broken and separated from the pile body. Finally, the casing piece and the concrete inside the casing piece are cut off to achieve the breaking operation of the pile head part.

[0030] Embodiment 2, as Figure 2 As shown, this embodiment discloses a noiseless self-balancing pile head breaking tool, the pile head breaking tool comprises a pulling member, a casing member 1, a top plate member, and a hydraulic jack 7; The casing member 1 is in the shape of a hollow tube arranged longitudinally, and a guide plate 101 is fixedly arranged on the side wall of the casing member 1. The guide plate 101 is curved and arranged along the circumferential direction of the casing member 1, and the bottom end surface of the guide plate 101 is an inclined surface structure that gradually tilts upward from one end to the other end. The pulling member is composed of a plurality of L-shaped steel bars 2 and a plurality of annular steel bars 3 fixedly connected; the plurality of L-shaped steel bars 2 are arranged at equal intervals along the circumferential direction of the casing member 1, and the L-shaped steel bars 2 are integrally formed by a vertical section 21 and a horizontal section 22, the vertical section 21 of the L-shaped steel bar is in contact with the side wall of the casing member 1 and the length direction of the vertical section 21 is consistent with the axial direction of the casing member 1, and the top ends of the vertical sections 21 of the plurality of L-shaped steel bars are detachably connected to the top plate member; A reinforcement plate 23 is welded between the vertical sections 21 of adjacent L-shaped steel bars. The reinforcement plate 23 is arranged in an arc shape and the curvature of the inner wall of the reinforcement plate 23 is adapted to the curvature of the outer wall of the casing member 1. The reinforcement plate 23 is located below the guide plate 101. A wedge block 24 is fixedly connected to the top end of the reinforcement plate 23. The top end face of the wedge block 24 is adapted to the inclined structure of the bottom end of the guide plate 101 and contacts each other.

[0031] The bottom end of the vertical section 21 of the L-shaped steel bar is connected to one end of the horizontal section 22 , and the other end of the horizontal section 22 extends away from the axis of the casing member 1 , and the length direction of the horizontal section 22 is consistent with the radial direction of the casing member 1 .

[0032] The plurality of annular steel bars 3 are sleeved on the outside of the vertical sections 21 of the plurality of L-shaped steel bars, the diameters of the plurality of annular steel bars 3 are successively increased and coaxially arranged, and the bottom ends of the plurality of annular steel bars 3 are welded to the upper end of the horizontal section 22 of the L-shaped steel bar.

[0033] The top plate member includes a load-bearing plate 4, a fixing rod 5, and a double-headed screw sleeve 6; the load-bearing plate 4 is in the shape of a circular plate, and a plurality of fixing rods 5 are welded to the bottom end of the load-bearing plate 4, and the plurality of fixing rods 5 are arranged corresponding to the vertical sections 21 of the plurality of L-shaped steel bars; the side walls at the bottom ends of the fixing rods 5 and the side walls at the top ends of the vertical sections 21 of the L-shaped steel bars are both provided with threads and are threadedly connected to the two ends of the double-headed screw sleeve 6 through threads.

[0034] The bearing plate 4 is located above the casing member 1, and the hydraulic jack 7 is arranged between the bearing plate 4 and the top of the casing member 1. The bottom end of the hydraulic jack 7 contacts the solidified concrete cast inside the casing member 1 and realizes bottom support. The top end of the hydraulic jack 7 contacts the bearing plate 4 and stretches and pulls the pulling member and the solidified concrete above the pulling member through the fixed rod 5.

[0035] In this solution, when the hydraulic jack lifts the pulling member and the concrete above the pulling member, under the cooperation of the inclined structure of the wedge block and the guide plate, the wedge block, the pulling member and the concrete will rotate along the bottom inclined surface of the guide plate, so that the pulling member produces an upward pulling force on the concrete accompanied by a rotational torque, making it easier for the concrete above the pulling member to be broken and separated from the pile body below the pulling member, thereby improving the separation effect of the pile head part and the pile body part.

[0036] Embodiment 3, as Figure 3 As shown, this embodiment discloses a noiseless self-balancing pile head breaking tool, the pile head breaking tool comprises a pulling member, a casing member 1, a top plate member, and a hydraulic jack 7; The casing member 1 is in the shape of a hollow tube arranged longitudinally, and a diameter-reducing structure 102 is arranged on the side wall of the casing member 1, and the outer diameter of the bottom end of the casing member 1 is reduced by the diameter-reducing structure 102; The pulling member is composed of a plurality of L-shaped steel bars 2 and a plurality of annular steel bars 3 fixedly connected; the plurality of L-shaped steel bars 2 are arranged at equal intervals along the circumferential direction of the casing member 1, and the L-shaped steel bars 2 are integrally formed by a vertical section 21 and a horizontal section 22. The top side wall of the vertical section 21 of the L-shaped steel bar contacts the top side wall of the casing member 1, and the bottom end of the vertical section 21 of the L-shaped steel bar is inclined along the reduced diameter structure of the casing member 1 (that is, the bottom end of the vertical section 21 of the L-shaped steel bar is inclined toward the axial position of the casing member 1) and the bottom end side wall of the inclined vertical section 21 contacts the outer side wall of the casing member 1 after the reduction of the diameter.

[0037] The top ends of the vertical sections 21 of the L-shaped steel bars are detachably connected to the top plate, and the bottom ends of the vertical sections 21 of the L-shaped steel bars are connected to one end of the horizontal section 22. The other end of the horizontal section 22 extends away from the axis of the casing member 1 and the length direction of the horizontal section 22 is consistent with the radial direction of the casing member 1.

[0038] The plurality of annular steel bars 3 are sleeved on the outside of the vertical sections 21 of the plurality of L-shaped steel bars, the diameters of the plurality of annular steel bars 3 are successively increased and coaxially arranged, and the bottom ends of the plurality of annular steel bars 3 are welded to the upper end of the horizontal section 22 of the L-shaped steel bar.

[0039] The top plate member includes a load-bearing plate 4, a fixing rod 5, and a double-headed screw sleeve 6; the load-bearing plate 4 is in the shape of a circular plate, and a plurality of fixing rods 5 are welded to the bottom end of the load-bearing plate 4, and the plurality of fixing rods 5 are arranged corresponding to the vertical sections 21 of the plurality of L-shaped steel bars; the side walls at the bottom ends of the fixing rods 5 and the side walls at the top ends of the vertical sections 21 of the L-shaped steel bars are both provided with threads and are threadedly connected to the two ends of the double-headed screw sleeve 6 through threads.

[0040] The bearing plate 4 is located above the casing member 1, and the hydraulic jack 7 is arranged between the bearing plate 4 and the top of the casing member 1. The bottom end of the hydraulic jack 7 contacts the solidified concrete cast inside the casing member 1 and realizes bottom support. The top end of the hydraulic jack 7 contacts the bearing plate 4 and stretches and pulls the pulling member and the solidified concrete above the pulling member through the fixed rod 5.

[0041] In this solution, when the hydraulic jack lifts the pulling member and the concrete above the pulling member, the bottom end of the vertical section of the L-shaped steel bar will be hindered by the reduced diameter structure of the casing member when moving upward and will expand in the direction away from the axis of the casing member under the action of this obstruction. This expansion action will cause an extrusion force on the concrete located above the horizontal section of the L-shaped steel bar and the annular steel bar, so that the concrete in the pile head part is squeezed and crushed by the expansion force during the upward pulling process. This design makes it easier for the pile head part to be crushed and separated from the pile body below the pulling member, thereby improving the separation effect of the pile head part and the pile body part.

[0042] Furthermore, the inclined structure of the L-shaped steel bar will support the casing member after contacting the reduced diameter structure of the casing member, thereby improving the placement stability of the casing member between a plurality of L-shaped steel bars.

[0043] like Figures 4 to 9 As shown, the present invention also discloses a method for using the noiseless self-balancing pile head breaking tool, which is described in detail by taking the breaking tool in Example 1 as an example, and mainly includes the following steps: S1. According to the design drawings and engineering requirements, determine the specific specifications and quantities of the L-shaped steel bar assembly, the ring steel bar reinforcement structure, the casing 1 and the jack system; weld the L-shaped steel bar 2 and the ring steel bar 3; S2. Before pouring concrete at the pile head, carry out the pre-embedded installation of L-shaped steel bars 2, annular steel bars 3 and casing 1; accurately place the L-shaped steel bars 2 at the pile head position according to the design requirements, and bind the annular steel bars 3 with the reserved steel bars 8 in the pile body mold (such as Figure 4 As shown), 8 sets of PVC pipes are reserved for steel bars, and the ends are sealed with tape to isolate the reserved steel bars from the concrete, so as to facilitate the separation of the concrete of the pile head part 901; and ensure that the top of the L-shaped vertical section 21 of the steel bar is exposed from the upper surface of the concrete; then the casing 1 is installed to ensure that it is accurately positioned, firmly fixed, and slightly higher than the upper surface of the concrete, and then foam is wrapped around the outside of the casing 1 to reduce the adhesion of the outer concrete to it.

[0044] S3. After the embedded installation is completed, the pouring pipe is extended into the casing 1 to perform the concrete slurry pouring operation. During the pouring process, attention should be paid to vibrating and compacting to ensure a good combination between the concrete and the embedded parts until the concrete slurry reaches the preset pouring height; S4, after the concrete reaches the designed strength, a preliminary pile body is formed 9 (such as Figure 5 As shown in FIG. 1 ), a cutting machine is used to perform a surrounding cutting operation around the preliminary pile body 9 at the horizontal plane where the L-shaped steel bar horizontal section 22 is located (as shown in FIG. 1 ). Figure 6 As shown in the figure), the cutting depth needs to be precisely controlled to ensure that the embedded L-shaped horizontal section 22 of the steel bar is exposed, while avoiding damage to the annular steel bar 2 and the casing 1; S5, install the hydraulic jack 7 into the casing 1, so that it contacts the upper surface of the concrete in the casing 1; cover the bearing plate 4 on the hydraulic jack 7, so that its bottom contacts the top of the hydraulic jack 7; fasten the fixing rod 5 to the top of the vertical section 21 of the L-shaped steel bar through the stud screw 6 (such as Figure 7 At the same time, check whether the various functions of the hydraulic jack 7 are normal.

[0045] S6, start the hydraulic jack 7, and gradually apply an upward pulling force to the L-shaped steel bar 2. During the pulling process, it is necessary to pay close attention to the changes in the pile head part, such as the generation and expansion of cracks, and adjust the pulling force according to the actual situation; at the same time, it is necessary to ensure that the casing 1 remains stable during the pulling process to limit the lateral deformation of the concrete in the casing 1; finally, the pile head part 901 above the pulling member and the pile body part 902 below the pulling member are separated from the ring cutting position 903 (such as Figure 7 , Figure 8 shown); S7, after the separated pile head part 901 is removed, a cutting machine is used to cut off the casing member 1 and the solidified concrete in the casing member 1 at the top of the pile body part 902 (such as Fig. 9 As shown), the pile body part 902 is then further processed (such as cutting, grinding, etc.) to meet subsequent construction requirements, and finally a finished pile body 10 is obtained.

[0046] The present invention has the following beneficial effects: 1. The present invention abandons traditional destructive methods such as impact drilling or blasting, and instead adopts the principle of mechanical pulling. Through the pre-buried L-shaped steel bars and the annular steel bar reinforcement structure thereon, combined with the jack system, the non-destructive or low-destructive separation of the pile head is achieved; the tool can quickly destroy and separate the concrete around the pile head, improve the construction efficiency, and significantly shorten the construction time; in terms of economy, it effectively reduces labor costs and maintenance costs, and improves the economic benefits of pile construction operations.

[0047] 2. The present invention utilizes the interaction force between steel bars and concrete to perform breaking operations, thereby avoiding direct impact and damage to the pre-buried structural steel bars in the pile body, protecting the integrity and performance of the structural steel bars, and effectively improving the construction quality of the pile body; at the same time, it reduces dust and noise pollution during the construction process, which is in line with the concept of green construction.

[0048] 3. The present invention increases the contact area between the pulling member and the concrete of the pile head by arranging annular steel bars on the horizontal section of the L-shaped steel bars, thereby significantly improving the bonding force between the steel bars and the concrete and the overall pulling effect, and ensuring the stability and safety during the pulling process; at the same time, the present invention limits the lateral deformation of the concrete in the casing by introducing casing parts, provides a stable support platform for the hydraulic jack, and further enhances the overall performance of the pulling system.

[0049] 4. All components of the present invention (L-shaped steel bar assembly, annular steel bar reinforcement structure, circular casing, jack system) can be modularly designed and adjusted according to specific engineering requirements, such as changing the size of the L-shaped steel bar, adjusting the number and spacing of the annular steel bars, optimizing the diameter and height of the circular casing, etc.; so that it can meet the pile head partial breaking operation of all pile construction operations; it effectively solves many problems existing in traditional pile head breaking methods and has broad application prospects and market value.

Claims

1. A noiseless self-balancing pile head breaking tool, characterized by: The pile head breaking tool includes a pulling piece, a casing piece, a top plate piece, and a power lifting piece; the casing piece is in the shape of a hollow tube arranged longitudinally; the pulling piece is arranged on the outer side of the circumference of the casing piece, and the top end of the pulling piece is connected to the top plate piece; the top plate piece is located above the casing piece, and the power lifting piece is arranged between the top plate piece and the top end of the casing piece, the bottom end of the power lifting piece contacts with the solidified concrete cast inside the casing piece and realizes bottom support, the top end of the power lifting piece contacts with the top plate piece and stretches and pulls the pulling piece and the solidified concrete above the pulling piece through the top plate piece.

2. The noiseless self-balancing pile head breaking tool according to claim 1, characterized in that: The pulling member is composed of a plurality of L-shaped steel bars and a plurality of annular steel bars fixedly connected; the plurality of L-shaped steel bars are arranged at equal intervals along the circumferential direction of the casing member, the L-shaped steel bars are integrally formed by vertical sections and horizontal sections, the vertical sections of the L-shaped steel bars are in contact with the side walls of the casing member and the length direction of the vertical sections is consistent with the axial direction of the casing member, the top ends of the vertical sections of the plurality of L-shaped steel bars are detachably connected to the top plate member; the horizontal sections of the L-shaped steel bars extend in a direction away from the axial direction of the casing member and the length direction of the horizontal sections is consistent with the radial direction of the casing member.

3. The noiseless self-balancing pile head breaking tool according to claim 2, characterized in that: The plurality of annular steel bars are sleeved outside the vertical sections of the plurality of L-shaped steel bars, the diameters of the plurality of annular steel bars are successively increased and coaxially arranged, and the bottom ends of the plurality of annular steel bars are welded to the upper ends of the horizontal sections of the L-shaped steel bars.

4. The noiseless self-balancing pile head breaking tool according to claim 2, characterized in that: The top plate member includes a load-bearing plate, a fixing rod, and a double-ended screw sleeve; the load-bearing plate is in the shape of a circular plate, and a plurality of fixing rods are welded to the bottom end of the load-bearing plate, and the plurality of fixing rods are arranged corresponding to the vertical sections of a plurality of L-shaped steel bars; the side wall at the bottom end of the fixing rod and the side wall at the top end of the vertical section of the L-shaped steel bar are both provided with threads and are threadedly connected to the two ends of the double-ended screw sleeve through the threads.

5. The noiseless self-balancing pile head breaking tool according to claim 2, characterized in that: A reinforcement plate is welded between the vertical sections of adjacent L-shaped steel bars. The reinforcement plate is arranged in an arc shape and the curvature of the inner wall of the reinforcement plate is adapted to the curvature of the outer wall of the casing member. A guide plate is fixedly arranged on the side wall of the casing member. The guide plate is curved and arranged along the circumferential direction of the casing member. The guide plate is located above the reinforcement plate, and the bottom end face of the guide plate is an inclined structure gradually inclined upward from one end to the other end; a wedge block is fixedly connected to the top end of the reinforcement plate, and the top end face of the wedge block is adapted to the inclined structure of the bottom end of the guide plate and contacts with each other.

6. The noiseless self-balancing pile head breaking tool according to claim 2, characterized in that: A reducing structure is provided on the side wall of the casing member, and the outer diameter of the bottom end of the casing member is reduced by the reducing structure. The top end of the vertical section of the L-shaped steel bar contacts the top side wall of the casing member, and the bottom end of the vertical section of the L-shaped steel bar is inclined along the reducing structure of the casing member, and the bottom end of the inclined vertical section contacts the outer side wall of the casing member after the reduction of the diameter.

7. The noiseless self-balancing pile head breaking tool according to claim 1, characterized in that: The power lifting component is a hydraulic jack.

8. The noiseless self-balancing pile head breaking tool according to claim 1, characterized in that: The bottom end height of the sleeve member is lower than the bottom end height of the pulling member.

9. A method for using the noiseless self-balancing pile head breaking tool as claimed in claim 3, characterized in that: The following steps are involved: S1. Weld the L-shaped steel bars to the annular steel bars, and bind and connect the annular steel bars to the reserved steel bars in the pile mold at the designed height of the finished pile body; S2. placing a casing piece between the vertical sections of a plurality of L-shaped steel bars, wherein the casing piece is clamped and positioned or bound by a plurality of L-shaped steel bars; S3, extending the pouring pipe into the casing to perform concrete slurry pouring operation, so that the concrete slurry enters the pile body mold until the concrete slurry reaches a preset pouring height; S4, after the concrete slurry solidifies, a preliminary pile body is formed, the pile body mold is removed, and a circumferential cutting operation is performed on the outer peripheral side wall of the preliminary pile body at the height of the horizontal section of the L-shaped steel bar; S5. After the ring cutting operation, a top plate is connected to the top of the vertical section of the L-shaped steel bar, and then a power lifting member is placed between the casing member and the top plate member, the bottom end of the power lifting member contacts the top of the solidified concrete in the casing member, and the top end of the power lifting member contacts the top plate member; S6, the power lifting member is raised, the top plate member and the pulling member move upward together and drive the pile head part above the pulling member and the pile body part below the pulling member to separate from the ring cutting position; S7, after the separated pile head part is removed, the casing part and the solidified concrete in the casing part are cut off at the top of the pile body part to obtain a finished pile body.

10. The method for using the noiseless self-balancing pile head breaking tool according to claim 9, characterized in that: In the step S1, a PVC pipe is sleeved outside the reserved steel bars in the pile body mold and is bound and connected to the annular steel bars through the PVC pipe.

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