Automatic stobing device system that easily forms a pre-break

Abstract

The present application relates to pile foundation bored pile construction technology field, disclose a kind of easy to form pre-fracture automatic broken pile device system, including pre-fracture auxiliary structure and jack set device, jack set device includes jack set and the conical shell of the outer layer of jack set;Pre-fracture auxiliary structure includes the first half pipe body and the second half pipe body separated along vertical direction, the inner cavity of first half pipe body and second half pipe body form column, the connecting surface of first half pipe body close to second half pipe body is provided with lug, the connecting surface of second half pipe body close to first half pipe body is provided with limiting recess, the shape of lug and limiting recess is matched, and lug is installed in the inboard of limiting recess.Pre-fracture auxiliary structure is spliced by two half circular pipe body, lug is arranged in recess, one hand in the pouring process two half circular pipe body will not be dislocated, on the other hand guarantee first half pipe body and second half pipe body are separated along vertical direction, realize that pile body is broken along vertical direction.

Description

Technical Field

[0001] This invention relates to the field of bored pile construction technology, and in particular to an automatic pile breaking device system that easily forms a pre-section. Background Technology

[0002] The conventional process for removing the pile head of bored cast-in-place piles in pile foundations involves workers manually chiseling the pile head using pneumatic picks and drills with an air compressor. This process carries significant safety risks, is difficult to control in terms of quality, causes high environmental pollution, and has low production efficiency. It easily generates dust and noise pollution; it can easily lead to occupational health and safety hazards for workers (occupational diseases such as tinnitus and pneumoconiosis, and safety risks such as collapse, electric shock, etc.); and it can easily cause engineering quality problems such as twisting and damage to the pile head reinforcement and destruction of the protective layer. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides an automatic pile breaking device system that facilitates the formation of pre-sections.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0005] An automatic pile breaking device system that easily forms a pre-section includes a pre-section auxiliary structure arranged radially along a reinforcing cage and a jack assembly device arranged inside the reinforcing cage. The jack assembly device includes a jack assembly and a frustoconical shell arranged on the outer layer of the jack assembly. The pre-section auxiliary structure includes a first half-pipe and a second half-pipe separated vertically. The inner cavities of the first half-pipe and the second half-pipe form a column shape. A protrusion is provided on the connecting surface of the first half-pipe near the second half-pipe, and a limiting groove is provided on the connecting surface of the second half-pipe near the first half-pipe. The shape of the protrusion matches that of the limiting groove, and the protrusion is installed inside the limiting groove.

[0006] In an automatic pile breaking device system that easily forms a pre-section, the pre-section auxiliary structure is a hollow tube, and the inside of the pre-section auxiliary structure is filled with filler or the two ends of the pre-section auxiliary structure are sealed.

[0007] In automatic pile breaking device systems that easily form pre-sections, the length of the pre-section auxiliary structure is less than the radius of the reinforcing ring of the steel cage.

[0008] In an automatic pile breaking device system that easily forms a pre-section, a mounting frame is welded onto the reinforcing cage, and the pre-section auxiliary structure is installed on the upper side of the mounting frame.

[0009] In an automatic pile breaking device system that easily forms a pre-section, the mounting frame includes a first vertical side welded to the inner side of the vertical main reinforcement, a second vertical side welded to the outer side of the vertical main reinforcement, a first transverse side and a second transverse side respectively arranged perpendicular to the first vertical side and the second vertical side, a first reinforcing rib connecting the first transverse side and the first vertical side, and a second reinforcing rib connecting the second transverse side and the second vertical side. The first vertical side and the second vertical side are arranged parallel to each other. The first transverse side is located inside the vertical main reinforcement, and the second transverse side is located outside the vertical main reinforcement. The first transverse side and the second transverse side are fixed to the lower side of the pre-section auxiliary structure.

[0010] In an automatic pile breaking device system that easily forms a pre-section, the first transverse side and the second transverse side are connected as one unit, or the first transverse side and the second transverse side are two separate sections on the same straight line.

[0011] In the automatic pile breaking device system that easily forms a pre-section, after the pre-section auxiliary structure is installed on the upper side of the mounting frame, the side wall of the protrusion near the limiting groove is set perpendicular to the horizontal plane, the side wall of the limiting groove near the protrusion is set perpendicular to the horizontal plane, and the outer sides of the first half-pipe and the second half-pipe are fitted with connecting strips.

[0012] In an automatic pile breaking device system that easily forms a pre-section, the jack group includes a first jack, a second jack, and a pad plate set on the lower side of the second jack in the vertical direction from top to bottom. The second jack is a multi-stage jack. The pad plate includes a baffle set on the lower opening end of the frustum-shaped shell and a connecting rod on the upper side of the baffle.

[0013] The automatic pile breaking device system that can easily form a pre-section also includes a concrete partition structure installed on the reinforcing cage. The concrete partition structure is fixed to the outside and / or inside of the reinforcing cage, and the concrete partition structure is ring-shaped. The upper surfaces of the concrete partition structure and the jack assembly are on the same plane.

[0014] In an automatic pile-breaking device system that easily forms pre-sections, the pre-section auxiliary structure is fixed on the upper side of the reinforcing ring of the steel cage, the side of the pre-section auxiliary structure near the reinforcing ring of the steel cage is connected to the reinforcing ring of the steel cage, and the side of the pre-section auxiliary structure near the concrete partition structure is connected to the concrete partition structure.

[0015] In the automatic pile breaking device system that easily forms a pre-section, the jack assembly also includes a fixing frame. The side of the fixing frame near the jack assembly is connected to the jack assembly, and the side of the fixing frame near the reinforcing ring of the reinforcing cage overlaps on the reinforcing ring of the reinforcing cage. The fixing frame includes a sleeve connected to the jack assembly and a connecting pipe connected to the reinforcing cage. The connecting pipe is sleeved on the sleeve. The side wall of the sleeve is provided with a through hole. The connecting pipe is provided with a clamp or screw that matches the through hole. When the connecting pipe is sleeved on the sleeve, the clamp or screw is installed in the through hole.

[0016] This invention, by adopting the above technical solutions, has significant technical effects:

[0017] When the first jack malfunctions, a pile splitter is inserted into the inner side of the pre-section auxiliary structure to break the pile. The pre-section auxiliary structure is composed of two semi-circular tubes joined together. This joint structure will not be damaged during the pile splitter's action and facilitates its recovery after the pile is broken. A protrusion is positioned within a groove to prevent misalignment during concrete pouring. Furthermore, during the pile splitter's action, the protrusion moves within the limiting groove, ensuring that the first and second semi-tubes separate vertically, thus achieving vertical pile breakage.

[0018] After the pre-section auxiliary structure is installed on the upper side of the mounting frame, the sidewalls of the protrusions and limiting grooves are set perpendicular to the horizontal plane to serve as limiting elements. This ensures that the two semi-circular tubes of the pre-section auxiliary structure will not misalign during concrete pouring, facilitating subsequent fracture using a splitter. Furthermore, it ensures that when the splitter acts on the inner side of the pre-section auxiliary structure, the two semi-circular tubes fracture vertically.

[0019] The mounting frame of this invention not only accurately positions the jack assembly installation site but also serves to install the pre-section auxiliary structure. The mounting frame comprises two frame units with vertical main reinforcement bars on the inner and outer sides. These two units are used to position the jack assembly installation site and to install the pre-section auxiliary structure. Furthermore, the stable structure of the two frame units prevents misalignment of the pre-section auxiliary structure and the mounting frame due to concrete pressure during pouring.

[0020] The present invention includes a fixing frame for accurately lowering the automatic pile cutter. The sleeve is used to connect the jack assembly, and the connecting pipe is used to overlap the reinforcing ring of the steel cage. The connecting pipe is sleeved on the sleeve. This structure facilitates the accurate lowering of the automatic pile cutter to the pre-break surface (i.e., the top of the reinforcing ring of the steel cage corresponding to the pre-break surface position).

[0021] In this invention, a concrete partition structure is located on the inner and / or outer side of the reinforcing cage, and its shape is annular. Because the concrete partition structure divides the concrete, it facilitates the generation of a pre-section in the concrete when the jack assembly is activated, i.e., the generation of an auxiliary pre-section. Specifically, the concrete partition structure reduces the concrete area, making it easier to fracture. A splitter is inserted into the pre-section auxiliary structure to facilitate pile breaking after concrete pouring.

[0022] In this invention, pressure is applied to the first jack, generating a counter-pressure (tension) on the surrounding concrete, causing the pre-section concrete to fracture. Pressure is then applied to the second jack, a multi-stage jack, which exerts upward pressure on the concrete below the conical structure. The continuous extension and lifting of the multi-stage jacks facilitates the removal of the upper concrete of the fractured pre-section. The first and second jacks simplify the construction difficulty for workers chiseling open the upper reinforced concrete of the pre-fractured surface, eliminating potential quality hazards such as twisted or damaged pile head reinforcement and damaged protective layer, thus improving the quality of pile head removal. They also eliminate the pollution from dust and noise generated by manual chiseling, and the occupational health and safety hazards to workers (such as tinnitus, pneumoconiosis, and other occupational diseases, as well as safety risks like collapse, electric shock, etc.). The machine replacement improves construction efficiency and saves on pile head removal costs; it also reduces energy consumption of conventional air compressors and other equipment, resulting in low-carbon energy saving and emission reduction.

[0023] In this invention, the multi-stage jack is suitable for applications where installation space is limited but a long working stroke is required. As the multi-stage jack extends stage by stage, the effective working area decreases progressively; when the multi-stage jack is not in operation, it retracts to a shorter length. When the input flow rate remains constant, the extension speed gradually increases; when the external load remains constant, the working pressure of the hydraulic cylinder gradually increases. The extension of the multi-stage jack relies on piston pressure, while its retraction relies on its own weight or the load.

[0024] In this invention, the pre-section auxiliary structure is a backup device. When the jack assembly is not working well or malfunctions, a splitter can be inserted into the pre-section auxiliary structure to assist in the generation of the pre-section.

[0025] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the present invention.

[0027] Figure 2 This is a top view of the present invention.

[0028] Figure 3 yes Figure 2 A magnified view of part A in the image.

[0029] Figure 4 This is a structural diagram of another state of concrete partition structure.

[0030] Figure 5 This is a structural diagram of the third state of a concrete partition structure.

[0031] Figure 6 This is a schematic diagram of the pre-section auxiliary structure installed on the mounting frame.

[0032] Figure 7This is a structural diagram of the mounting bracket.

[0033] Figure 8 This is a schematic diagram of another type of mounting bracket.

[0034] Figure 9 This is a schematic diagram of the structure where the first and second halves of the tube are joined together.

[0035] Figure 10 This is a structural diagram of the pad. Detailed Implementation

[0036] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0037] like Figures 1-10 As shown, an automatic pile breaking device system that easily forms a pre-section includes a pre-section auxiliary structure 10 arranged radially along the reinforcing cage 8 and a jack assembly device arranged inside the reinforcing cage 8. The jack assembly device includes a jack assembly and a frustoconical shell 1 arranged on the outer layer of the jack assembly. The pre-section auxiliary structure 10 includes a first half-pipe 101 and a second half-pipe 102 separated in the vertical direction. The inner cavities of the first half-pipe 101 and the second half-pipe 102 form a column shape. A protrusion 104 is provided on the connecting surface of the first half-pipe 101 near the second half-pipe 102. A limiting groove 105 is provided on the connecting surface of the second half-pipe 102 near the first half-pipe 101. The shape of the protrusion 104 matches that of the limiting groove 105. The protrusion 104 is installed inside the limiting groove 105.

[0038] In this embodiment, a splitter is inserted into the pre-section auxiliary structure 10 to facilitate pile breaking after concrete pouring. The pre-section auxiliary structure 10 is composed of two semi-circular tubes spliced ​​together. This spliced ​​structure will not be damaged during the pile breaking process by the splitter, and it is easy to recover the pre-section auxiliary structure 10 after pile breaking. The structure of the protrusion 104 and the limiting groove 105 ensures that the two semi-circular tubes of the pre-section auxiliary structure 10 will not be misaligned during concrete pouring, providing convenience for subsequent breaking with the splitter. In addition, it also ensures that when the splitter acts on the inner side of the pre-section auxiliary structure 10, the two semi-circular tubes break in the vertical direction. The frustum-shaped shell 1 is poured with high-strength concrete, achieving the technical effect of good overall structural performance and reduced cost. In a preferred embodiment, the pre-section auxiliary structure 10 is a hollow tube, and the inner side of the pre-section auxiliary structure 10 is filled with filler or the two ends of the pre-section auxiliary structure are end capped. The length of the pre-section auxiliary structure 10 is less than the radius of the reinforcing ring 81 of the steel cage. The inner side of the pre-section auxiliary structure 10 is filled with filler that is easy to remove, or the two ends of the pre-section auxiliary structure are sealed to prevent concrete from entering the interior. During the concrete pouring process, this structure ensures that the inner side of the pre-section auxiliary structure 10 will not be filled with concrete, which facilitates the later installation of the splitter.

[0039] In a preferred embodiment, the mounting frame 11 includes a first vertical edge 13 welded to the inner side of the vertical main reinforcement 82, a second vertical edge 14 welded to the outer side of the vertical main reinforcement 82, a first horizontal edge 15 and a second horizontal edge 18 respectively arranged perpendicular to the first vertical edge 13 and the second vertical edge 14, a first reinforcing rib 16 connecting the first horizontal edge 15 and the first vertical edge 13, and a second reinforcing rib 17 connecting the second horizontal edge 18 and the second vertical edge 14. The first vertical edge 13 and the second vertical edge 14 are arranged parallel to each other. The first horizontal edge 15 is located inside the vertical main reinforcement 12, and the second horizontal edge 18 is located outside the vertical main reinforcement 12. The first horizontal edge 15 and the second horizontal edge 18 are fixed to the lower side of the pre-section auxiliary structure 10. The mounting frame 11 serves to accurately position the installation point of the jack assembly device and also serves to install the pre-section auxiliary structure 10. The mounting frame 11 includes two frame units with vertical main reinforcement bars 82 on the inner and outer sides. These two frame units are used simultaneously to position the jack assembly installation points and to install the pre-section auxiliary structure 10. Furthermore, the structure of the two frame units is stable, preventing misalignment of the pre-section auxiliary structure 10 and the mounting frame 11 due to concrete pressure during pouring. Preferably, after the pre-section auxiliary structure 10 is installed on the upper side of the mounting frame 11, the side wall of the protrusion 104 near the limiting groove 105 is perpendicular to the horizontal plane, and the side wall of the limiting groove 105 near the protrusion 104 is also perpendicular to the horizontal plane. Connecting straps 103 are sleeved on the outer sides of the first half-pipe 101 and the second half-pipe 102. After the pre-section auxiliary structure 10 is installed on the upper side of the mounting frame 11, the protrusion 104 and the limiting groove 105 are both set perpendicular to the horizontal plane on the side wall, which serves as a limiting function. On the one hand, this ensures that the two semi-circular tubes of the pre-section auxiliary structure 10 will not be misaligned during the concrete pouring process, which facilitates the subsequent use of a splitter for breaking. On the other hand, it also ensures that when the splitter acts on the inner side of the pre-section auxiliary structure 10, the two semi-circular tubes break in the vertical direction. In a preferred embodiment, the jack assembly includes, from top to bottom, a first jack 21, a second jack 22, and a pad 23 set on the lower side of the second jack 22. The second jack 22 is a multi-stage jack. The pad 23 includes a baffle 231 set at the lower opening end of the frustum-shaped shell 1 and a connecting rod 232 on the upper side of the baffle 231. Applying pressure to the first jack 21 generates pressure on the concrete (i.e., the pre-section) around it, causing the pre-section concrete to break. In this process, it is used in conjunction with the concrete partition structure 9 to produce a better pre-section effect. Pressure is applied to the multi-stage jacks of the second jack 22, which exert upward pressure on the concrete on the lower side of the frustum-shaped shell 1. The multi-stage jacks continuously extend and lift through the lower side of the frustum-shaped shell 1, facilitating the removal of the concrete above the fractured pre-section. The pad 23 is fixed to the opening end on the lower side of the frustum-shaped shell 1 by fixing the connecting rod 232 to the mounting hole on the lower side of the second jack 22.Preferably, the connecting strip 103 is made of an elastic material, such as rubber.

[0040] like Figure 7 As shown, in the preferred embodiment, the first horizontal edge 15 and the second horizontal edge 18 are connected as one unit.

[0041] like Figure 8 As shown, in the preferred embodiment, the first horizontal edge 15 and the second horizontal edge 18 are two segments separated on the same straight line.

[0042] A preferred embodiment further includes a concrete partition structure 9 installed on the reinforcing cage 8. The concrete partition structure 9 is fixed to the outside and / or inside of the reinforcing cage 8, and the concrete partition structure 9 is annular in shape. The upper surfaces of the concrete partition structure 9 and the jack assembly are on the same plane. Because the concrete partition structure 9 creates a gap in the concrete, it facilitates the generation of a pre-section in the concrete when the jack assembly is activated, i.e., the generation of an auxiliary pre-section. Specifically, the concrete partition structure 9 reduces the concrete area, making it easier to break.

[0043] In a preferred embodiment, the pre-section auxiliary structure 10 is fixed on the upper side of the reinforcing ring 81 of the steel cage, the side of the pre-section auxiliary structure 10 near the reinforcing ring 81 is connected to the reinforcing ring 81 of the steel cage, and the side of the pre-section auxiliary structure 10 near the concrete partition structure 9 is connected to the concrete partition structure 9.

[0044] In a preferred embodiment, the jack assembly also includes a fixing frame 7. The side of the fixing frame 7 closest to the jack assembly is connected to the jack assembly, and the side of the fixing frame 7 closest to the reinforcing ring 81 overlaps with the reinforcing ring 81. The fixing frame 7 includes a sleeve 71 connected to the jack assembly and a connecting pipe 72 connected to the reinforcing ring 81. The connecting pipe 72 is fitted onto the sleeve 71. The side wall of the sleeve 71 has a through hole 711. The connecting pipe 72 has a clamp or screw 721 that matches the through hole 711. When the connecting pipe 72 is fitted onto the sleeve 71, the clamp or screw 721 is installed in the through hole 711. The fixing frame 7 is used to accurately lower the automatic pile cutter. Lowering the jack assembly by installing the fixing frame 7 on the upper side of the reinforcing ring 81 provides a simple and accurate installation method. Sleeve 71 is used to connect the jack assembly, and connecting pipe 72 is used to overlap the reinforcing ring of the steel cage. Connecting pipe 72 is sleeved in sleeve 71. This structure facilitates the accurate lowering of the automatic pile cutter to the designed fracture surface (i.e., the top of the reinforcing ring of the steel cage corresponding to the pre-section position).

[0045] The working process of this embodiment is as follows: (1) Install concrete partition structure 9 on the inner or outer side of the steel cage 8. The concrete partition structure 9 is installed on the pre-section surface where the steel cage 8 is lowered and poured. The installation frame 11 is welded on the vertical main reinforcement 82 of the steel cage, and the upper surface of the installation frame 11 is on the pre-section surface where the steel cage 8 is lowered and poured. The pre-section auxiliary pipe 10 is installed on the installation frame 11. (2) Lower the steel cage 8 with the installed concrete partition structure 9 and pre-section auxiliary structure 10 installed. After cleaning the hole, pour concrete. Before the concrete is initially set after pouring (generally within 4 hours after pouring), lower the automatic pile cutter so that the upper surface of the automatic pile cutter is set on the pre-section surface. The jack group includes a frustum-shaped shell 1. The first jack 21 and the second jack 22 are set from top to bottom on the inner side of the frustum-shaped shell 1. The second jack 22 is a multi-stage jack, and the lower side of the multi-stage jack penetrates the lower side of the frustum-shaped shell 1. (3) When the concrete of the pile foundation reaches 30%-100% of the design strength (i.e., concrete strength above 10 MPa), after the foundation pit is excavated and the retaining wall is completed, the first jack 21 is started to exert pressure on the concrete on the upper and lower sides of the pre-section. With the assistance of the concrete partition structure 9, the pre-section concrete is fractured. When the first jack 21 fails, a splitter is inserted into the inner side of the pre-section auxiliary structure 10 to break the pile. The protrusion 104 moves in the limiting groove 105 to ensure that the first half-pipe 101 and the second half-pipe are separated in the vertical direction, so that the pile body is fractured in the vertical direction. (4) The second jack 22 is started. The second jack 22 exerts downward pressure on the concrete on the lower side of the frustum-shaped shell 1. During the continuous extension and lifting of the second jack 22, the pile head on the upper side of the fractured pre-section is lifted away.

[0046] In summary, the above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the present invention.

Claims

1. An automatic pile-breaking device system that easily forms a pre-section, characterized in that: The system includes a pre-section auxiliary structure (10) arranged radially along the reinforcing cage and a jack assembly device arranged inside the reinforcing cage (8). The jack assembly device includes a jack assembly and a frustoconical shell (1) arranged on the outer layer of the jack assembly. The pre-section auxiliary structure (10) includes a first half-pipe (101) and a second half-pipe (102) separated vertically. The inner cavities of the first half-pipe (101) and the second half-pipe (102) are cylindrical. A protrusion (104) is provided on the connecting surface of the first half-pipe (101) near the second half-pipe (102), and a limiting groove (105) is provided on the connecting surface of the second half-pipe (102) near the first half-pipe (101). The protrusion (104) matches the shape of the limiting groove (105), and the protrusion (104) is installed on the inner side of the limiting groove (105). After the pre-section auxiliary structure (10) is installed on the upper side of the mounting bracket (11), the side wall of the protrusion (104) near the limiting groove (105) is set perpendicular to the horizontal plane, and the side wall of the limiting groove (105) near the protrusion (104) is set perpendicular to the horizontal plane. When the splitter breaks the pile, it guides the first half-pipe (101) and the second half-pipe (102) to separate in the vertical direction.

2. The automatic pile-breaking device system for easily forming pre-sections according to claim 1, characterized in that: The pre-section auxiliary structure (10) is a hollow tube. The inside of the pre-section auxiliary structure (10) is filled with filler or the two ends of the pre-section auxiliary structure are equipped with end caps to easily form an automatic pile breaking device system for pre-section. The length of the pre-section auxiliary structure (10) is less than the radius of the reinforcing ring (81) of the steel cage.

3. The automatic pile-breaking device system for easily forming pre-sections according to claim 1, characterized in that: An installation frame (11) is welded onto the reinforcing cage (8), and a pre-section auxiliary structure (10) is installed on the upper side of the installation frame (11).

4. The automatic pile-breaking device system for easily forming pre-sections according to claim 3, characterized in that: The mounting bracket (11) includes a first vertical side (13) welded to the inner side of the vertical main reinforcement (82), a second vertical side (14) welded to the outer side of the vertical main reinforcement (82), a first horizontal side (15) and a second horizontal side (18) respectively arranged perpendicular to the first vertical side (13) and the second vertical side (14), a first reinforcing rib (16) connecting the first horizontal side (15) and the first vertical side (13), and a second reinforcing rib (17) connecting the second horizontal side (18) and the second vertical side (14). The first vertical side (13) and the second vertical side (14) are arranged parallel to each other. The first horizontal side (15) is arranged inside the vertical main reinforcement (12), and the second horizontal side (18) is arranged outside the vertical main reinforcement (12). The first horizontal side (15) and the second horizontal side (18) are fixed to the lower side of the pre-section auxiliary structure (10).

5. The automatic pile-breaking device system for easily forming pre-sections according to claim 4, characterized in that: The first horizontal edge (15) and the second horizontal edge (18) are connected as one, or the first horizontal edge (15) and the second horizontal edge (18) are two separate segments on the same straight line.

6. The automatic pile-breaking device system for easily forming pre-sections according to claim 4, characterized in that: After the pre-section auxiliary structure (10) is installed on the upper side of the mounting bracket (11), the side wall of the protrusion (104) near the limiting groove (105) is set perpendicular to the horizontal plane, the side wall of the limiting groove (105) near the protrusion (104) is set perpendicular to the horizontal plane, and the outer side of the first half-tube (101) and the second half-tube (102) is fitted with a connecting strip (103).

7. The automatic pile-breaking device system for easily forming pre-sections according to claim 1, characterized in that: The jack assembly includes, from top to bottom, a first jack (21), a second jack (22), and a pad (23) provided on the lower side of the second jack (22). The second jack (22) is a multi-stage jack. The pad (23) includes a baffle (231) provided on the lower opening end of the frustum-shaped shell (1) and a connecting rod (232) on the upper side of the baffle (231).

8. The automatic pile-breaking device system for easily forming pre-sections according to claim 1, characterized in that: It also includes a concrete partition structure (9) installed on the reinforcing cage (8), the concrete partition structure (9) is fixed to the outside and / or inside of the reinforcing cage (8), and the concrete partition structure (9) is ring-shaped, with the upper surface of the concrete partition structure (9) and the jack assembly on the same plane.

9. The automatic pile-breaking device system for easily forming pre-sections according to claim 8, characterized in that: The pre-section auxiliary structure (10) is fixed on the upper side of the reinforcing ring (81) of the steel cage. The side of the pre-section auxiliary structure (10) close to the reinforcing ring (81) is connected to the reinforcing ring (81), and the side of the pre-section auxiliary structure (10) close to the concrete partition structure (9) is connected to the concrete partition structure (9).

10. The automatic pile-breaking device system for easily forming pre-sections according to claim 1, characterized in that: The jack assembly also includes a fixing frame (7). The fixing frame (7) is connected to the jack assembly on the side near the jack assembly. The fixing frame (7) overlaps on the reinforcing ring (81) of the reinforcing cage on the side near the reinforcing ring (81). The fixing frame (7) includes a sleeve (71) connected to the jack assembly and a connecting pipe (72) connected to the reinforcing cage (8). The connecting pipe (72) is fitted onto the sleeve (71). The side wall of the sleeve (71) is provided with a through hole (711). The connecting pipe (72) is provided with a clamp or screw (721) that matches the through hole (711). When the connecting pipe (72) is fitted onto the sleeve (71), the clamp or screw (721) is installed in the through hole (711).

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