Piling equipment for house building engineering
By introducing the bottom expansion and compaction mechanism into the pile driving equipment, the problems of uneven bottom expansion and unstable hole walls in the prior art are solved, and more efficient bottom expansion forming and pile foundation stability improvement are achieved.
Patent Information
- Application Number
- CN202510718596.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-30
- Publication Date
- 2025-07-18
AI Technical Summary
In the prior art, the impact bottom expansion method is susceptible to great influence by geology, uneven bottom expansion and difficult to control the size, and the mechanical bottom expansion is limited in longitudinal expansion, and the thickness of the expansion head is insufficient. The drill pipe needs to be moved up and down many times, and the hole wall cannot be compacted and reinforced, making it easy to collapse or backfille.
A pile driving equipment for building construction projects is adopted, including pile frame, power head, auger drill rod, bottom expansion mechanism and compaction mechanism. The longitudinal bottom expansion range is increased through the bottom expansion mechanism. The compaction mechanism tops the hole wall during the bottom expansion process to ensure the morphological integrity and dimensional accuracy of the expansion area.
The consistency of the expansion bottom size and improvement of pile foundation stability are achieved, the number of movements of the drill rod up and down is reduced, the shape and size of the expansion area are complete and the dimensions are accurate, and the load bearing performance and stability of pile foundation are improved.
Smart Images
Figure CN120331656A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of pile driving in building construction projects, and specifically to a pile driving device for building construction projects. Background Art
[0002] Building construction projects, also known as housing construction projects, are an important category in construction projects and are widely present in urbanization construction. They come in a rich variety, among which residential building construction projects are the most common type. Such building projects are usually for the general public and carry the living function, with relatively high requirements for safety, comfort, stability, etc., and also have relatively strict requirements for the bearing capacity of the foundation. In residential building construction projects, foundation treatment is one of the key links in the initial stage of construction. The load of the building needs to be transmitted to deeper and more stable soil layers through the foundation to ensure the safety and long-term stability of the overall structure. When the bearing capacity of the natural foundation soil is insufficient or the load of the building itself is large, a single shallow foundation cannot meet the requirements, and pile driving needs to be used to reinforce the foundation. Pile driving essentially transmits the load to deeper soil layers or rock layers with higher bearing capacity by burying pile bodies, so as to enhance the overall bearing capacity and anti-deformation ability of the foundation.
[0003] Pile driving can not only improve the bearing capacity of building foundations, but also control settlement and enhance the safety of structures. During pile driving construction, further excavation is often carried out at the bottom of the pile to form an "expanded head" that is larger than the diameter of the pile hole. This step is called under-reaming. Under-reaming refers to expanding the area at the bottom end of the pile into a flared, spherical or cylindrical shape, thereby forming a larger bearing surface. The reason for under-reaming is that in some cases where the bearing capacity of the foundation is low or the length of the pile body is limited, the single ordinary pile bottom area cannot meet the design bearing capacity requirements. By expanding the pile bottom area, the pile tip resistance can be significantly increased, thereby improving the vertical bearing capacity of the entire pile.
[0004] Currently, common under-reaming construction methods include impact under-reaming and mechanical under-reaming: The impact under-reaming method uses high-pressure water flow or air impact to "open" the soil layer at the bottom of the pile to form an under-reamed area. This method has simple equipment and is suitable for some soft soil layers, but its forming effect is greatly affected by geological conditions, with uneven under-reaming and difficult size control, which affects the stability of the pile foundation; Mechanical under-reaming is achieved by rotating multiple single-layer rotary cutters to expand the hole. The main increase is in the "lateral area", and the longitudinal dimension is small. The thickness of the formed expanded head is insufficient, and it is necessary to control the drill pipe to move up and down multiple times to form the under-reamed pile hole. Moreover, during the under-reaming process, the hole wall cannot be compacted and stabilized, and situations such as hole wall collapse or backfilling are likely to occur. Summary of the Invention
[0005] The present invention provides a pile driving device for building construction projects, which solves the technical problems that the current impact under-reaming method is easily affected by geology, the under-reaming is uneven, the size is difficult to control, affecting the stability of the pile foundation, the mechanical under-reaming has limited longitudinal expansion, the thickness of the enlarged head is insufficient, the drill pipe needs to be moved up and down multiple times to complete the forming, and the hole wall cannot be compacted and reinforced, prone to wall collapse or backfill.
[0006] A pile driving device for building construction projects provided by the present invention includes a pile frame, a power head slidably arranged at the front of the pile frame, and a spiral drill pipe rotatably installed under the power head. A columnar groove is opened inside the spiral drill pipe, and an installation cylinder communicated with the columnar groove is fixedly connected by embedding at the lower part of the spiral drill pipe. An under-reaming mechanism for longitudinally expanding and evenly under-reaming in the later stage of pile driving operation is arranged on the installation cylinder. The under-reaming mechanism is composed of several under-reaming knife parts circumferentially and equidistantly arranged on the installation cylinder. The under-reaming knife part includes an embedding groove opened in the middle of the outer wall of the installation cylinder and two installation grooves one opened on the outer wall of the installation cylinder and symmetrically distributed about the center and respectively communicated with the embedding groove. L-shaped shifting rods are hinged in the installation grooves one. Support plates are fixedly connected to the opposite sides of the two L-shaped shifting rods. Tooth discs one for laterally under-reaming in the pile hole are rotatably connected by embedding at the adjacent ends of the two support plates. An under-reaming component for longitudinally under-reaming in the pile hole is movably arranged between the two support plates and located in the embedding groove. A compaction mechanism for compacting the hole wall while under-reaming the pile hole to avoid the collapse of the under-reamed pile hole is arranged on the installation cylinder. A driving mechanism for driving the under-reaming mechanism and the compaction mechanism to operate synchronously is arranged between the columnar groove and the inner cavity of the installation cylinder.
[0007] In a possible implementation manner, the compaction mechanism includes an installation groove two, a rectangular placement groove, an L-shaped support rod, and a pressure roller. A plurality of installation groove groups are circumferentially and equidistantly opened on the outer wall of the installation cylinder. The installation groove group is composed of two installation grooves two symmetrically opened up and down on the outer wall of the installation cylinder. Rectangular placement grooves are opened on the adjacent side walls of the upper and lower adjacent installation grooves two. An L-shaped support rod is hinged in the installation groove two. A pressure roller located in the rectangular placement groove is rotatably connected to the side of the vertical section of the L-shaped support rod close to the axis of the installation cylinder.
[0008] In a possible implementation manner, the driving mechanism includes a guiding component arranged in the inner cavity of the installation cylinder, two installation discs slidably installed on the guiding component symmetrically up and down, and an opposite displacement component arranged in the inner cavity of the columnar groove for driving the two installation discs to move closer to each other. A plurality of telescopic columns one and telescopic columns two respectively corresponding to the L-shaped shifting rods and the L-shaped support rods are fixedly connected to the outer wall of the installation disc circumferentially and equidistantly. The end of the telescopic column one away from the installation disc is hinged to the horizontal section of the corresponding L-shaped shifting rod. The end of the telescopic column two away from the installation disc is hinged to the horizontal section of the corresponding L-shaped support rod.
[0009] In a possible implementation, the bottom-expanded component includes a sliding seat, a telescopic frame, and a second gear disk. Sliding seats located in the embedding groove are rotatably connected to one side of the support plate close to the embedding groove. A telescopic frame is movably hinged between the upper and lower sliding seats. A plurality of wheel frame members are equidistantly arranged on the side of the telescopic frame away from the axis of the installation cylinder. Second gear disks are rotatably installed on the wheel frame members.
[0010] In a possible implementation, the guiding component includes two sliding rods symmetrically and fixedly connected to the inner cavity of the installation cylinder through connecting columns, and the sliding rods are parallel to the axis of the installation cylinder. The installation disk is slidably sleeved outside the two sliding rods, and limiting blocks are fixedly connected to the ends of the two sliding rods.
[0011] In a possible implementation, the opposite displacement component includes a driving motor fixedly connected to the upper part of the inner cavity of the columnar groove of the installation frame. A rotating shaft is fixedly connected to the output shaft of the driving motor. A bidirectional screw rod is fixedly connected to the lower end of the rotating shaft, and the lower end of the bidirectional screw rod is rotatably connected to the bottom of the installation cylinder cavity. The two installation disks are respectively sleeved and threadedly connected to the outside of the bidirectional screw rod.
[0012] In a possible implementation, the wheel frame member includes a rotating column rotatably connected to two adjacent hinge points in the transverse direction of the telescopic frame. A sliding frame is slidably connected outside the two rotating columns. A C-shaped frame is fixedly connected to the sliding frame by embedding. The second gear disk is rotatably connected between the opposite sides of the transverse section of the C-shaped frame.
[0013] In a possible implementation, a plurality of through holes are circumferentially and equidistantly formed in the bottom wall plate of the installation cylinder. A connecting plate is fixedly connected to the inner wall of the through hole. A spring telescopic rod is fixedly connected to the lower end surface of the connecting plate and at the center of the circle of the through hole. A blocking disk is fixedly connected to the lower end of the spring telescopic rod.
[0014] In a possible implementation, an arc-shaped plate is fixedly connected to the lower end of the blocking disk, and a conical guiding ring is fixedly connected to the bottom of the installation cylinder cavity.
[0015] In a possible implementation, a top spring is fixedly connected to the groove wall on one side of the rectangular placement groove close to the axis of the installation cylinder. A push plate slidably arranged in the rectangular placement groove is fixedly connected to the end of the top spring away from the axis of the installation cylinder.
[0016] From the above technical solutions, it can be seen that the present invention has the following advantages:
[0017] In the present invention, two support plates in the bottom expansion mechanism rotate away from each other to pull the bottom expansion assembly to expand longitudinally, increasing the depth dimension on the basis of the original bottom expansion diameter, enlarging the longitudinal bottom expansion range, fundamentally solving the problems of insufficient thickness of the enlarged head and limited longitudinal expansion in the existing mechanical bottom expansion method, reducing the number of times of moving the drill pipe up and down to complete the bottom expansion forming, effectively simplifying the construction process, ensuring the consistency of the bottom expansion size at the same time, improving the bottom expansion accuracy and the pile foundation bearing performance, and making the pile foundation more stable.
[0018] In the present invention, two L-shaped support rods in the compaction mechanism rotate away from each other to drive the pressure rollers arranged at the ends of the support rods to expand, so that the pressure rollers actively touch and compact the inner wall of the pile foundation bottom expansion area during the bottom expansion process, and the pile wall is top-pressed and compacted while the bottom expansion is carried out, densely reinforcing the loose hole wall soil body, effectively suppressing the risk of hole wall collapse or backfilling caused by soil disturbance, and ensuring the integrity of the shape and the dimensional accuracy of the bottom expansion area. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative work.
[0020] Figure 1 It is a schematic structural diagram of the pile driving equipment for building construction projects provided by the present invention.
[0021] Figure 2 It is a schematic structural diagram of the installation structure of the installation cylinder provided by the present invention.
[0022] Figure 3 It is a schematic cross-sectional view of the connection structure between the installation cylinder and the spiral drill pipe provided by the present invention.
[0023] Figure 4 It is a schematic perspective cross-sectional view of the installation cylinder provided by the present invention.
[0024] Figure 5 Provided by the present invention Figure 2 Schematic enlarged view of the structure of part A in
[0025] Figure 6 Provided by the present invention Figure 3 Schematic enlarged view of the structure of part D in
[0026] Figure 7 It is a schematic structural diagram of part of the bottom expansion cutter provided by the present invention.
[0027] Figure 8 Provided by the present invention Figure 7Schematic enlarged view of part F therein.
[0028] Figure 9 Provided by the present invention Figure 2 Schematic enlarged view of part B therein.
[0029] Figure 10 Schematic cross-sectional view of the installation structure of the compaction mechanism provided by the present invention.
[0030] Figure 11 Provided by the present invention Figure 2 Schematic enlarged view of part C therein.
[0031] Figure 12 Provided by the present invention Figure 3 Schematic enlarged view of part E therein.
[0032] Wherein, the above-mentioned drawings include the following reference numerals:
[0033] 1, pile frame; 2, power head; 3, auger rod; 4, push plate; 5, columnar groove; 6, mounting cylinder; 7, under-reaming mechanism; 71, embedding groove; 72, first mounting groove; 73, L-shaped lever; 74, support plate; 75, first gear disk; 76, under-reaming assembly; 761, sliding seat; 762, telescopic frame; 763, second gear disk; 764, rotating column; 765, sliding frame; 766, C-shaped frame; 8, compaction mechanism; 81, second mounting groove; 82, rectangular placement groove; 83, L-shaped support rod; 84, pressure roller; 9, drive mechanism; 91, guiding assembly; 911, sliding rod; 912, limiting block; 92, mounting disk; 93, opposite displacement member; 931, drive motor; 932, rotating shaft; 933, bidirectional screw; 94, first telescopic column; 95, second telescopic column; 10, through hole; 11, retaining disk; 12, conical guiding ring. Detailed implementation manners
[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation manners of the present invention will be given with reference to the drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.
[0035] Please refer to Figure 1 , Figure 2 and Figure 3, the present invention provides a technical solution: a pile driving device for a building construction project, including a pile frame 1, a power head 2 slidably arranged at the front of the pile frame 1, and a spiral drill rod 3 rotatably installed under the power head 2. A columnar groove 5 is opened inside the spiral drill rod 3. An installation cylinder 6 communicating with the columnar groove 5 is fixedly connected by embedding at the lower part of the spiral drill rod 3. An under-reaming mechanism 7 for longitudinally expanding and evenly under-reaming at the later stage of pile driving operation is arranged on the installation cylinder 6. A compaction mechanism 8 for under-reaming the pile hole and simultaneously pressing and compacting the hole wall to prevent the under-reamed pile hole from collapsing is arranged on the installation cylinder 6. A driving mechanism 9 for driving the under-reaming mechanism 7 and the compaction mechanism 8 to operate synchronously is jointly arranged between the columnar groove 5 and the inner cavity of the installation cylinder 6.
[0036] Please refer to Figure 3 , Figure 5 and Figure 6 , in this embodiment, the under-reaming mechanism 7 is composed of a plurality of under-reaming cutter parts circumferentially and equidistantly arranged on the installation cylinder 6. The under-reaming cutter part includes an embedding groove 71 opened in the middle of the outer wall of the installation cylinder 6, and two installation grooves 72 opened on the outer wall of the installation cylinder 6 and symmetrically distributed around the center and respectively communicating with the embedding groove 71. L-shaped lever 73 is hinged in each of the installation grooves 72. Support plates 74 are fixedly connected to the opposite sides of the two L-shaped levers 73. A first gear disk 75 for laterally under-reaming in the pile hole is rotatably connected by embedding at the adjacent ends of the two support plates 74. An under-reaming assembly 76 for longitudinally under-reaming in the pile hole is movably arranged between the two support plates 74 and located in the embedding groove 71.
[0037] Please refer to Figure 2 , Figure 5 , Figure 7 and Figure 8 , the under-reaming assembly 76 includes a sliding seat 761, a telescopic frame 762, a wheel frame member, and a second gear disk 763. Sliding seats 761 are rotatably connected to the sides of the support plates 74 close to the embedding groove 71 and located in the embedding groove 71. A telescopic frame 762 is movably hinged between the upper and lower sliding seats 761. A plurality of wheel frame members are equidistantly arranged on the side of the telescopic frame 762 away from the axis of the installation cylinder 6. Second gear disks 763 are rotatably installed on the wheel frame members. The wheel frame member includes a rotating column 764 rotatably connected to two adjacent hinge points of the telescopic frame 762. A sliding frame 765 is jointly slidably connected to the outside of the two rotating columns 764. A C-shaped frame 766 is fixedly connected by embedding on the sliding frame 765. The second gear disk 763 is rotatably connected between the opposite sides of the transverse section of the C-shaped frame 766.
[0038] Please refer to Figure 3 , Figure 4 , Figure 6 and Figure 10, the driving mechanism 9 includes a guiding component 91 arranged in the inner cavity of the mounting cylinder 6, two mounting disks 92 slidably mounted on the guiding component 91 symmetrically up and down, and an opposite driving member 93 arranged in the inner cavity of the columnar groove 5 for driving the two mounting disks 92 to move closer to each other. A plurality of telescopic columns 94 corresponding to the L-shaped levers 73 are fixedly connected equidistantly in the circumferential direction of the outer wall of the mounting disk 92. One end of the telescopic column 94 away from the mounting disk 92 is hinged to the transverse section of the corresponding L-shaped lever 73. The guiding component 91 includes two sliding rods 911 symmetrically fixedly connected to the inner cavity of the mounting cylinder 6 through connecting columns, and the sliding rods 911 are parallel to the axis of the mounting cylinder 6. The mounting disks 92 are slidably sleeved outside the two sliding rods 911. Limiting blocks 912 are fixedly connected to the ends of the two sliding rods 911. The opposite driving member 93 includes a driving motor 931 fixedly connected to the upper part of the inner cavity of the columnar groove 5. The output shaft of the driving motor 931 is fixedly connected with a rotating shaft 932. A bidirectional screw 933 is fixedly connected to the lower end of the rotating shaft 932, and the lower end of the bidirectional screw 933 is rotatably connected to the bottom of the inner cavity of the mounting cylinder 6. The two mounting disks 92 are respectively sleeved and threadedly connected to the outside of the bidirectional screw 933.
[0039] The support plate 74 is initially retracted into the first mounting groove 72, and the bottom-expanding assembly 76 is initially retracted into the embedding groove 71. When driving a pile, first control the power head 2 to operate to drive the auger 3 to rotate, and at the same time control the power head 2 to slowly move downward along the pile frame 1, so that the auger 3 is gradually inserted into the foundation for pile driving and drilling. After the auger 3 is moved down to the required depth, control the driving motor 931 to operate to drive the rotating shaft 932 to rotate. The rotating shaft 932 then drives the bidirectional screw 933 to rotate. The bidirectional screw 933 drives the two mounting disks 92 to move closer to each other along the sliding rods 911. The mounting disks 92 then synchronously drive the telescopic columns 94 to move. The adjacent telescopic columns 94 move closer to each other and then drive the L-shaped levers 73 to rotate. The L-shaped levers 73 then drive the support plates 74 to rotate, so that the support plates 74 are moved out of the first mounting groove 72. The upper and lower support plates 74 rotate away from each other along with the L-shaped levers 73 and will also drive the telescopic frame 762 to move out of the embedding groove 71 through the sliding seat 761 at the same time. At the same time, the telescopic frame 762 is stretched and elongated. Then the rotating column 764 of the telescopic frame 762 slides in the sliding frame 765, and further drives the second gear disk 763 to extend out of the embedding groove 71 through the sliding frame 765 and the C-shaped frame 766 and at the same time drives the second gear disk 763 to move away from each other to widen the distance, until the upper and lower support plates 74 rotate to the horizontal position. At this time, the telescopic frame 762 is also fully unfolded, and the first gear disk 75 and the second gear disk 763 are in contact with the inner wall of the pile hole at this time.
[0040] The auger rod 3 drives the mounting cylinder 6 to rotate synchronously. The mounting cylinder 6 then drives the support plate 74 and the telescopic frame 762 to rotate synchronously, and further drives the first gear disk 75 and the second gear disk 763 to rotate along the inner wall of the bottom of the pile hole. During the rotation of the first gear disk 75 and the second gear disk 763, the inner wall of the pile hole contacted is crushed and enlarged, so as to perform under-reaming treatment on the bottom of the pile hole, increase the longitudinal under-reaming range during rotation, and accelerate the formation speed of under-reaming.
[0041] After the under-reaming is completed, control the driving motor 931 to reverse, which drives the rotating shaft 932 to rotate in the reverse direction. The rotating shaft 932 then drives the bidirectional screw rod 933 to reverse, so that the two mounting disks 92 move away from each other. The mounting disks 92 then drive the L-shaped lever 73 to reverse and reset through the first telescopic column 94. The L-shaped lever 73 drives the support plate 74 to rotate, so that the support plate 74 drives the first gear disk 75 to gradually retract into the first mounting groove 72. The upper and lower support plates 74 rotate close to each other and at the same time drive the telescopic frame 762 to contract. The telescopic frame 762 then drives the second gear disk 763 to move closer to each other through the sliding frame 765 and the C-shaped frame 766. When the support plate 74 is completely retracted into the first mounting groove 72, the telescopic frame 762 also indirectly drives the first gear disk 75 to retract into the embedding groove 71, so that the power head 2 can be controlled to move up along the pile frame 1 to pull out the auger rod 3.
[0042] Please refer to Figure 4 and Figure 10 In this embodiment, the compaction mechanism 8 includes a second mounting groove 81, a rectangular placing groove 82, an L-shaped support rod 83 and a pressing roller 84. A plurality of mounting groove groups are circumferentially and equidistantly arranged on the outer wall of the mounting cylinder 6. The mounting groove group is composed of two second mounting grooves 81 symmetrically arranged up and down on the outer wall of the mounting cylinder 6. The adjacent side walls of the upper and lower second mounting grooves 81 are both provided with rectangular placing grooves 82. An L-shaped support rod 83 is hinged in the second mounting groove 81. A pressing roller 84 located in the rectangular placing groove 82 is rotatably connected to the side of the vertical section of the L-shaped support rod 83 close to the axis of the mounting cylinder 6. A top spring is fixedly connected to the side wall of the rectangular placing groove 82 close to the axis of the mounting cylinder 6. One end of the top spring away from the axis of the mounting cylinder 6 is fixedly connected to a push plate 4 slidably arranged in the rectangular placing groove 82. The driving mechanism 9 further includes a plurality of second telescopic columns 95 circumferentially and equidistantly fixedly connected to the outer wall of the mounting disk 92 and corresponding to the L-shaped support rods 83. The end of the second telescopic column 95 away from the mounting disk 92 is hinged to the horizontal section of the corresponding L-shaped support rod 83.
[0043] When the bidirectional screw 933 rotates to drive the two mounting disks 92 to move closer to each other, the mounting disk 92 drives the L-shaped support rod 83 to rotate through the second telescopic column 95, so that the vertical section of the L-shaped support rod 83 gradually moves out of the second mounting groove 81. Then, the L-shaped support rod 83 drives the pressure roller 84 to move out of the rectangular placement groove 82 until the L-shaped support rod 83 rotates 90 degrees. At this time, the pressure roller 84 becomes vertically placed. At the same time, the top spring pushes the push plate 4 to move along the rectangular placement groove 82 until it stops at the opening position of the rectangular placement groove 82. The rectangular placement groove 82 is temporarily sealed by the push plate 4 to prevent soil from entering the rectangular placement groove 82 during the subsequent pile driving process. While the installation cylinder 6 rotates, it drives the pressure roller 84 to rotate synchronously through the L-shaped support rod 83. The pressure roller 84 presses the inner wall of the pile hole after the bottom expansion of the first gear disk 75 and the second gear disk 763, so as to compact the inner wall of the bottom-expanded area of the pile hole.
[0044] Please refer to Figure 2 、 Figure 10 、 Figure 11 and Figure 12 In this embodiment, a number of through holes 10 are circumferentially and equidistantly formed on the bottom wall plate of the installation cylinder 6. A connecting plate is fixedly connected to the inner wall of the through hole 10. A spring telescopic rod is fixedly connected to the lower end surface of the connecting plate and at the center of the circle of the through hole 10. The lower end of the spring telescopic rod is fixedly connected to a retaining disk 11. The lower end of the retaining disk 11 is fixedly connected to an arc-shaped plate. A conical guiding ring 12 is fixedly connected to the bottom of the cavity of the installation cylinder 6. During the process of the spiral drill rod 3 driving the installation cylinder 6 to rotate and move downward for bottom expansion, the arc-shaped plate abuts against the accumulated soil in the bottom area of the pile hole. The arc-shaped plate is pushed upward, thereby driving the retaining disk 11 to move upward and fit against the lower port of the through hole 10 to seal the through hole 10, reducing the probability of soil entering the installation cylinder 6 during the process of driving the pile hole downward. When the installation cylinder 6 moves upward and is removed from the pile hole after pile driving, the retaining disk 11 moves downward under the action of the spring telescopic rod and separates from the through hole 10, so that part of the soil that has entered the installation cylinder 6 rolls into the through hole 10 along the inclined surface of the conical guiding ring 12 and is finally discharged from the through hole 10.
[0045] During operation, first control the power head 2 to operate to drive the spiral drill rod 3 to rotate and slowly move downward, so that the spiral drill rod 3 drills into the foundation for pile driving. After the spiral drill rod 3 moves down to the required depth, control the drive mechanism 9 to operate to drive the bottom expansion mechanism 7 and the compaction mechanism 8 to operate synchronously. When the bottom expansion mechanism 7 operates, it unfolds and excavates the inner wall of the pile hole longitudinally, so that the bottom-expanded area is quickly formed. The compaction mechanism 8 synchronously performs real-time rolling treatment on the groove wall of the bottom-expanded area of the pile hole, thereby ensuring the stability of the wall of the pile hole after bottom expansion. After bottom expansion, control the drive mechanism 9 to operate in the reverse direction to drive the bottom expansion mechanism 7 and the compaction mechanism 8 to reset. Finally, control the power head 2 to drive the spiral drill rod 3 to move upward and pull out of the pile hole.
[0046] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.
[0047] In addition, the terms "first", "second", "No. 1", "No. 2" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", "No. 1", "No. 2" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.
[0048] In the present invention, unless otherwise clearly specified and limited, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0049] The embodiments of the specific implementation manners are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.
Claims
1. A piling device for building construction projects, comprising a pile frame, a power head slidably arranged at the front of the pile frame, and a spiral drill rod rotatably installed below the power head, characterized in that: A columnar groove is formed inside the auger drill pipe. An installation cylinder communicating with the columnar groove is fixedly connected to the lower part of the auger drill pipe in an embedded manner. An under-reaming mechanism is arranged on the installation cylinder for longitudinally expanding in the latter stage of pile driving operation to evenly under-ream the bottom. The under-reaming mechanism is composed of a plurality of under-reaming cutter parts circumferentially and equidistantly arranged on the installation cylinder. The under-reaming cutter part includes: An embedding groove formed in the middle of the outer wall of the installation cylinder, and two installation grooves I which are symmetrically distributed about the center and are respectively communicated with the embedding groove and are formed in the outer wall of the installation cylinder. An L-shaped shifting rod is hinged in each of the installation grooves I. A support plate is fixedly connected to the opposite side of the two L-shaped shifting rods. A gear disk I for laterally under-reaming in the pile hole is rotatably connected to the adjacent ends of the two support plates in an embedded manner. A common movable under-reaming assembly for longitudinally under-reaming in the pile hole is arranged between the two support plates and is located in the embedding groove. A compaction mechanism is arranged on the installation cylinder for under-reaming the pile hole and simultaneously pressing and compacting the hole wall to prevent the under-reamed pile hole from collapsing. A driving mechanism is jointly arranged between the columnar groove and the inner cavity of the installation cylinder for driving the under-reaming mechanism and the compaction mechanism to operate synchronously.
2. The pile driving device for building construction projects according to claim 1, characterized in that: The compaction mechanism includes an installation groove II, a rectangular placing groove, an L-shaped support rod and a pressing roller. A plurality of installation groove groups are circumferentially and equidistantly formed in the outer wall of the installation cylinder. Each installation groove group is composed of two installation grooves II which are symmetrically arranged up and down on the outer wall of the installation cylinder. The adjacent side walls of the upper and lower adjacent installation grooves II are both provided with rectangular placing grooves. An L-shaped support rod is hinged in the installation groove II. A pressing roller located in the rectangular placing groove is rotatably connected to the side of the vertical section of the L-shaped support rod close to the axis of the installation cylinder.
3. A pile driving device for building construction projects according to claim 2, characterized in that: The driving mechanism includes a guiding component arranged in the inner cavity of the installation cylinder, two installation disks slidably and symmetrically installed on the guiding component up and down, and an opposite driving member arranged on the inner cavity of the columnar groove for driving the two installation disks to move closer to each other. A plurality of telescopic columns I and telescopic columns II corresponding to the L-shaped shifting rods and the L-shaped support rods are respectively fixedly connected to the outer wall of the installation disk in a circumferential and equidistant manner. The end of the telescopic column I away from the installation disk is hinged to the horizontal section of the corresponding L-shaped shifting rod. The end of the telescopic column II away from the installation disk is hinged to the horizontal section of the corresponding L-shaped support rod.
4. A pile driving device for building construction projects according to claim 1, characterized in that: The under-reaming assembly includes a sliding seat, a telescopic frame and a gear disk II. The side of each support plate close to the embedding groove is rotatably connected to a sliding seat located in the embedding groove. A telescopic frame is movably hinged between the upper and lower sliding seats. A plurality of wheel frame members are equidistantly arranged on the side of the telescopic frame away from the axis of the installation cylinder. A gear disk II is rotatably installed on each of the wheel frame members.
5. The pile driving device for building construction projects according to claim 3, characterized in that: The guiding component includes two sliding rods symmetrically and fixedly connected to the inner cavity of the installation cylinder through connecting columns, and the sliding rods are parallel to the axis of the installation cylinder. The installation disk is slidably sleeved outside the two sliding rods. Limiting blocks are fixedly connected to the ends of the two sliding rods.
6. The pile driving device for building construction projects according to claim 3, wherein: The opposite driving member includes a driving motor fixedly connected to the upper part of the inner cavity of the columnar groove. The output shaft of the driving motor is fixedly connected to a rotating shaft. A bidirectional screw rod is fixedly connected to the lower end of the rotating shaft, and the lower end of the bidirectional screw rod is rotatably connected to the bottom of the inner cavity of the installation cylinder. The two installation disks are respectively sleeved and threadedly connected to the outside of the bidirectional screw rod.
7. A pile driving device for building construction projects according to claim 4, characterized in that: The wheel carrier includes a rotating column rotatably connected to two adjacent hinge points on the transverse side of the telescopic frame. A sliding frame is commonly slidably connected to the outside of the two rotating columns. A C-shaped frame is fixedly connected by embedding on the sliding frame. The second gear disk is rotatably connected between the opposite sides of the transverse section of the C-shaped frame.
8. A pile driving device for building construction projects according to claim 1, characterized in that: A plurality of through holes are circumferentially and equidistantly formed on the bottom wall plate of the installation cylinder. A connecting plate is fixedly connected to the inner wall of the through hole. A spring telescopic rod is fixedly connected to the lower end surface of the connecting plate and at the center of the circle of the through hole. The lower end of the spring telescopic rod is fixedly connected to a retaining disk.
9. A pile driving device for building construction according to claim 8, characterized in that: The lower end of the retaining disk is fixedly connected to an arc-shaped plate. A conical guiding ring is fixedly connected to the bottom of the cavity of the installation cylinder.
10. A pile driving device for building construction according to claim 2, characterized in that: A top spring is fixedly connected to one side wall of the rectangular placement groove close to the axis of the installation cylinder. One end of the top spring away from the axis of the installation cylinder is fixedly connected to a push plate slidably arranged in the rectangular placement groove.