Guiding device for construction of stiff composite pile

Abstract

A guiding device for construction of a stiff composite pile comprises a supporting unit connected with an opening of a pile hole, a near-end positioning unit and a far-end positioning unit, wherein the near-end positioning unit and the far-end positioning unit are arranged on the supporting unit and placed in the pile hole. The far-end positioning unit comprises a lifting structure arranged on the supporting unit and a positioning structure connected with the lifting structure and used for limiting the pile body in the radial direction. Through the structural arrangement of the far-end positioning unit, the far-end positioning unit is easier to recycle, the positioning and guiding effect on the pile body is improved, and the pile body positioning and guiding device has the advantages of being easy to construct, high in flexibility and good in economical efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of the construction technology of the stiff composite pile, and particularly relates to a guiding device for the construction of the stiff composite pile. Background Technique

[0002] The stiff composite pile is a new type of foundation treatment technology. By optimizing the conventional pile type, an advanced technology of the stiff composite pile is formed through transformation. This technology can form a composite pile bearing capacity by driving pipe piles into the cement-soil piles, and the bearing capacity can reach more than 450 tons. This composite effect enables the foundation soil and the pile material to be combined with each other, improving the stability and bearing capacity of the foundation, and is usually used in the construction of soft foundations.

[0003] In the treatment of soft foundations, a single-axis mixing pile machine is first used to construct cement mixing piles. Before the cement coagulates at the same pile center, a static pressure pile machine is selected to implant precast concrete piles. The connection of the precast piles uses a screw-lock connection to ensure the continuity of pile implantation. The combination of piles larger than a single pile forms a stiff composite pile. This composite pile has a high bearing capacity and also has anti-pulling, anti-bending, and anti-shearing effects, improving the bearing capacity after foundation treatment. Currently, during the operation of implanting the composite pile into the cement mixing pile, each pile of the composite pile needs to be pressed downward and embedded into the uncoagulated cement mixing pile, that is, the pouring material of the cement mixing pile needs to be squeezed downward and to both sides to form an implantation hole position for a single composite pile. The cement mixing pile has a slurry structure and has an upward reaction force on the composite pile, which will drive the composite pile to be deflected or horizontally displaced during implantation. As the implantation depth increases, the deflection and displacement amplitude of the composite pile are greater, affecting the subsequent bearing effect of the composite pile.

[0004] The document with the authorization announcement number of CN221589590U discloses a pile implantation guiding device during the construction of a stiff composite pile. The implantation guiding device is assembled and positioned with the top port of the hole position, and the implantation guiding device has a guiding mechanism that radially limits each composite pile and slides axially relative to it, and a distal positioning mechanism is also assembled between adjacent composite piles and near the bottom end.

[0005] The working principle of the device is as follows: During the implantation operation of the composite pile, first, the positioning sleeve is sleeved on the composite pile, then the distance-setting sleeve is sleeved at the bottom of the composite pile, and the fastening assembly is achieved through the fastening bolts. Then, the composite pile is lowered into the cement-soil mixing pile, and the positioning ring is clamped in the hole position. At the same time, the flanging ring is attached to the ground surface. The composite pile is continuously lowered until its top is close to the positioning sleeve, and then the subsequent connection of the composite pile is carried out. After the connection, the driving pull rope is pulled. After the fastening bolts are loosened, the distance-setting sleeve is lifted to the bottom side of the positioning sleeve. Then, the reconnected composite pile is continuously lowered, and through the annular space between the positioning sleeve and the positioning ring, the distance-setting sleeve at its bottom is tightly assembled with the bottom of the newly connected composite pile. Then, the positioning and lowering operation of the connected composite pile can be realized. After the entire implantation process is completed, the positioning sleeve and the distance-setting sleeve are detached and disassembled from the composite pile.

[0006] However, the device still has the following problems: First, the connection between the positioning sleeve at the lower end and the composite pile only ensures that the distance between the composite piles remains unchanged, but cannot ensure that the whole lower end of the composite pile does not deflect; Second, in order to ensure the guiding effect, the connection tightness between the positioning sleeve and the composite pile is strong, and the method of unlocking the positioning sleeve by pulling the bolt with a pull rope is not only laborious but also has a low success rate, and there is a large room for improvement. Utility Model Content

[0007] In view of the above existing problems, the purpose of the present utility model is to provide a guiding device for the construction of a rigid composite pile. Through the structural setting of the distal positioning unit, not only is the distal positioning unit easier to recover, but also the positioning and guiding effect on the pile body is improved, and it has the advantages of simple construction, strong flexibility, and good economy.

[0008] In order to achieve the above purpose, the technical solution of the present utility model is as follows:

[0009] A guiding device for the construction of a rigid composite pile includes a support unit connected to the opening of the pile hole, a proximal positioning unit and a distal positioning unit arranged on the support unit and placed in the pile hole; the distal positioning unit includes a lifting structure arranged on the support unit and a positioning structure connected to the lifting structure and having a radial limit for the pile body.

[0010] As a further preference of the present utility model, the proximal positioning unit includes a positioning ring arranged on the support unit and attached to the wall of the pile hole, a first positioning sleeve located inside the positioning ring, and a fixing plate for connecting the positioning ring and the first positioning sleeve.

[0011] As a further preference of the present utility model, the number of the first positioning sleeves is greater than or equal to 2 and they are symmetrically distributed along the axial direction of the pile hole, and adjacent first positioning sleeves are connected by a first connecting plate.

[0012] As a further preference of the present utility model, the positioning structure includes a plurality of second positioning sleeves corresponding to the first positioning sleeves one by one, and a second connecting plate for connecting the adjacent second positioning sleeves.

[0013] As a further preference of the present utility model, the lifting structure includes a support frame, a driving motor arranged on the support frame, a driving screw arranged on the output end of the driving motor, a connecting screw hole arranged on the second connecting plate and screwed with the driving screw, and a guide member arranged on the fixed plate or the first connecting plate and slidably connected with the positioning structure.

[0014] As a further preference of the present utility model, the guide member includes a first through hole arranged on the fixed plate, a positioning rod slidably connected on the first through hole, a positioning plate arranged on the side of the second positioning sleeve close to the hole wall of the pile hole, and a second through hole arranged on the positioning plate and matched with the first through hole for the positioning rod to pass through.

[0015] As a further preference of the present utility model, the guide member further includes a limiting plate arranged on one end of the positioning rod close to the opening of the pile hole.

[0016] As a further preference of the present utility model, the support unit includes a flanging ring connected to the ground and located on the outer end of the positioning ring, and a support plate arranged on the flanging ring for installing the lifting structure.

[0017] As a further preference of the present utility model, the support unit further includes a lifting structure arranged on the flanging ring for lifting the support plate; the lower end of the support plate is fixedly connected to the upper end of the positioning ring.

[0018] As a further preference of the present utility model, the lifting structure includes lifting cylinders symmetrically arranged on both side ends of the flanging ring, and a handle arranged on the side end of the support plate; the output end of the lifting cylinder is detachably connected to the support plate. Description of the Drawings

[0019] Attached Figure 1 is a schematic structural diagram of the present utility model.

[0020] Attached Figure 2 is a schematic structural diagram of the present utility model during operation.

[0021] Description of the Drawings: pile hole a, ground b, support unit 1, proximal positioning unit 2, distal positioning unit 3;

[0022] flanging ring 11, support plate 12, lifting structure 13;

[0023] Lifting cylinder 131, handle 132;

[0024] Positioning ring 21, first positioning sleeve 22, fixed plate 23, first connecting plate 24;

[0025] Second positioning sleeve 321, second connecting plate 322;

[0026] Lifting structure 31, positioning structure 32;

[0027] Support frame 311, drive motor 312, drive screw 313, connecting screw hole 314, guide member 315;

[0028] First through hole 315a, positioning rod 315b, positioning plate 315c, second through hole 315d, limiting plate 315e. Detailed implementation mode

[0029] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this utility model is habitually placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present utility model 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, and therefore should not be construed as a limitation to the present utility model.

[0030] In addition, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance

[0031] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, terms such as "set", "connected" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection: it can be a mechanical connection or an electrical connection: it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0032] Embodiment 1

[0033] This embodiment provides a guiding device for the construction of a stiff composite pile, including a support unit 1 connected to the opening of the pile hole a, a proximal positioning unit 2 arranged on the support unit 1 and placed in the pile hole a, and a distal positioning unit 3; the distal positioning unit 3 includes a lifting structure 31 arranged on the support unit 1 and a positioning structure 32 connected to the lifting structure 31 and having radial limitation on the pile body.

[0034] In this embodiment, the proximal positioning unit 2 includes a positioning ring 21 disposed on the support unit 1 and fitting against the wall of the pile hole a, a first positioning sleeve 22 located within the positioning ring 21, and a fixing plate 23 for connecting the positioning ring 21 and the first positioning sleeve 22. The support unit 1 includes a flanging ring 11 connected to the ground b and located at the outer end of the positioning ring 21, and a support plate 12 disposed on the flanging ring 11 for mounting the lifting structure 31. Among them, the inner wall of the flanging ring 11 is fixedly connected to the outer wall of the positioning ring 21, usually by welding; this setting is beneficial to increasing the contact area between the positioning ring 21 and the ground b, avoiding both the problem of cracking at the opening due to excessive stress concentration at the pile hole a and improving the overall support strength of the device. The positioning sleeve 22 is generally located at the center of the pile hole a to ensure that the rigid pile body placed plays the role of the inner core and improves the structural strength of the entire composite pile. The length of the placed pile body is generally equivalent to the depth of the pile hole, thus finally forming an equal-core composite pile; of course, a pile body longer or shorter than the depth of the pile hole can also be placed according to different construction requirements, thereby forming a long-core composite pile or a short-core composite pile. The cooperation between the lifting structure 31 and the positioning structure 32 can limit and guide the distal end of the pile body to ensure that the pile body is placed without skew. At the same time, the lifting structure 31 can be controlled on the ground, which is not only convenient to control, but also the insertion depth of the positioning structure 32 can be adjusted flexibly, suitable for the construction and introduction of composite piles in different depths and different scenarios. At the same time, the positioning structure 32 can also be easily recovered to the ground after completing the work, having the advantages of good working effect, high working efficiency, strong practicability, and good economy.

[0035] As a preference of this embodiment, the number of the first positioning sleeves 22 is greater than or equal to 2 and they are symmetrically distributed along the axial direction of the pile hole a, and the adjacent first positioning sleeves 22 are connected by a first connecting plate 24. In this embodiment, the number of the first positioning sleeves 22 is 2. The advantage of this setting is that two pile bodies can be placed in the pile hole to form a composite pile, and the distance between the pile bodies is equal, thereby further improving the uniformity and structural strength of the composite pile. The pile bodies can be placed synchronously or successively, and the construction flexibility is strong.

[0036] In this embodiment, the positioning structure 32 includes a plurality of second positioning sleeves 321 corresponding one-to-one to the first positioning sleeves 22, and a second connecting plate 322 for connecting the adjacent second positioning sleeves 321. The number and position of the second positioning sleeves 321 are exactly the same as those of the first positioning sleeves 22, that is, their projections completely overlap, so that both the upper and lower sections of the pile body can be effectively limited and supported when the pile body is placed.

[0037] In this embodiment, the lifting structure 31 includes a support frame 311, a driving motor 312 disposed on the support frame 311, a driving screw rod 313 disposed on the output end of the driving motor 312, a connecting screw hole 314 disposed on the second connecting plate 322 and screwed with the driving screw rod 313, and a guiding member 315 disposed on the fixing plate 23 or the first connecting plate 24 and slidably connected with the positioning structure 32. The guiding member 315 includes a first through hole 315a disposed on the fixing plate 23, a positioning rod 315b slidably connected in the first through hole 315a, a positioning plate 315c disposed on the second positioning sleeve 321 near the hole wall of the pile hole a, a second through hole 315d disposed on the positioning plate 315c and matching with the first through hole 315a for the positioning rod 315b to pass through, and a limiting plate 315e disposed on the positioning rod 315b near the opening end of the pile hole a.

[0038] The guiding device for the construction of the stiffened composite pile provided in this embodiment has the following working principle: After the device is installed, the lower end of the pile body passes through the proximal positioning unit and the distal positioning unit in sequence, and at the same time, the pile body and the distal positioning unit are lowered. The lowering of the pile body is controlled by a lifter, and the specific lowering method of the distal positioning unit is as follows: To start the driving motor to work, the driving motor drives the driving screw rod to rotate. Under the action of the positioning rod, the second connecting plate screwed with the driving screw rod cannot rotate, and thus descends along the driving screw rod under the rotation of the driving screw rod. When reaching the specified position, the driving motor stops working, and the position of the distal positioning unit is fixed. During the lowering process of the pile body, it always remains vertical under the guiding action of the proximal positioning unit and the distal positioning unit. After the entire pile body is placed, start the driving motor to work in the reverse direction, drive the entire distal positioning unit to lift to the opening of the pile hole, and then remove the entire guiding device to complete the work.

[0039] Embodiment 2

[0040] The difference between this embodiment and Embodiment 1 is that: the support unit 1 further includes a lifting structure 13 disposed on the flanging ring 11 and used for lifting the support plate 12; the lower end of the support plate 12 is fixedly connected to the upper end of the positioning ring 21. The lifting structure 13 includes lifting cylinders 131 symmetrically disposed on both side ends of the flanging ring 11, and a handle 132 disposed on the side end of the support plate 12; the output end of the lifting cylinder 131 is detachably connected to the support plate 12. Among them, the flanging ring 11 is in contact with and slidably connected to the positioning ring 21.

[0041] In comparison with Embodiment 1, the working mode of this embodiment is slightly different, mainly for dealing with the working conditions when more than two piles are inserted. The specific working principle is as follows: After the first two piles are inserted (the working principle can be seen in Embodiment 1), the support plate 12, the proximal positioning unit 2 connected to the support plate 12, and the distal positioning unit 3 connected to the lifting structure are all lifted by a certain height through the lifting structure 13 until they are separated from the inserted piles. Then, the connection structure between the lifting cylinder 131 and the support plate 12 is released, and it is connected to the handle 132 through manpower or a mechanical device. As a whole, the support plate 12 is rotated by a certain angle with the pile hole a as the center, so that the positions of both the proximal positioning unit 2 and the distal positioning unit 3 change, and the new positions are the positions for inserting new piles. Then, repeating the pile lowering in Embodiment 1 can increase the number of piles inserted into the pile hole a.

[0042] The advantage of setting this embodiment like this is that: without increasing the number of sleeves, the working condition of inserting multiple piles into the pile hole can be completed at the construction site, meeting the construction requirements of different composite piles. Moreover, the device has the advantages of simple construction and strong economy.

[0043] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the technical field to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A guiding device for the construction of a composite pile with stiffeners, characterized in that: It includes a support unit (1) connected to the opening of the pile hole (a), a proximal positioning unit (2) and a distal positioning unit (3) which are arranged on the support unit (1) and inserted into the pile hole (a); the distal positioning unit (3) includes a lifting structure (31) arranged on the support unit (1), and a positioning structure (32) which is connected to the lifting structure (31) and has radial limit for the pile body.

2. The guiding device for the construction of the composite stiff pile according to claim 1, wherein: The proximal positioning unit (2) includes a positioning ring (21) arranged on the support unit (1) and attached to the wall of the pile hole (a), a first positioning sleeve (22) located inside the positioning ring (21), and a fixing plate (23) for connecting the positioning ring (21) and the first positioning sleeve (22).

3. The guiding device for the construction of the stiff composite pile according to claim 2, characterized in that: The number of the first positioning sleeves (22) is greater than or equal to 2 and they are symmetrically distributed along the axial direction of the pile hole (a), and adjacent first positioning sleeves (22) are connected by a first connecting plate (24).

4. The guiding device for the construction of the composite stiff pile according to claim 3, characterized in that: The positioning structure (32) includes a plurality of second positioning sleeves (321) corresponding to the first positioning sleeves (22) one by one, and a second connecting plate (322) for connecting the adjacent second positioning sleeves (321).

5. A guiding device for the construction of a rigid composite pile according to claim 4, characterized in that: The lifting structure (31) includes a support frame (311), a driving motor (312) arranged on the support frame (311), a driving screw rod (313) arranged on the output end of the driving motor (312), a connecting screw hole (314) arranged on the second connecting plate (322) and screwed with the driving screw rod (313), and a guiding member (315) arranged on the fixing plate (23) or the first connecting plate (24) and slidably connected to the positioning structure (32).

6. The guiding device for the construction of the composite pile with stiffeners according to claim 5, characterized in that: The guiding member (315) includes a first through hole (315a) arranged on the fixing plate (23), a positioning rod (315b) slidably connected to the first through hole (315a), a positioning plate (315c) arranged on the side of the second positioning sleeve (321) close to the wall of the pile hole (a), and a second through hole (315d) arranged on the positioning plate (315c) and matching with the first through hole (315a) for the positioning rod (315b) to pass through.

7. The guiding device for constructing the rigid composite pile according to claim 6, characterized in that: The guiding member (315) further includes a limiting plate (315e) arranged at one end of the positioning rod (315b) close to the opening of the pile hole (a).

8. The guiding device for the construction of the stiff composite pile according to claim 2, wherein: The support unit (1) includes a flanging ring (11) connected to the ground (b) and located at the outer end of the positioning ring (21), and a support plate (12) arranged on the flanging ring (11) and used for installing the lifting structure (31).

9. The guiding device for the construction of the composite pile with stiffeners according to claim 8, characterized in that: The support unit (1) further includes a lifting structure (13) arranged on the flanging ring (11) and used for lifting the support plate (12); the lower end of the support plate (12) is fixedly connected to the upper end of the positioning ring (21).

10. A guiding device for the construction of a rigid composite pile according to claim 9, characterized in that: The lifting structure (13) includes lifting cylinders (131) symmetrically arranged on both side ends of the flanging ring (11), and a handle (132) arranged on the side end of the support plate (12); the output end of the lifting cylinder (131) is detachably connected to the support plate (12).

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