Novel threaded expanding body steel pile top prefabricated connecting piece
By adopting new threaded steel pile top prefabricated connectors, and using the combination of sealing plate and L-shaped fixed steel bars, the problem of small operating space and low construction efficiency at the connection between threaded steel piles and crown beams is solved, achieving high Quality and efficient connection.
Patent Information
- Application Number
- CN202421161264.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-27
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-05-27
AI Technical Summary
The connection between existing threaded enlarged steel piles and crown beams has problems such as small operating space, low construction efficiency and unreliable connection.
A new type of threaded enlarged steel pile pile top prefabricated connector is adopted, which consists of sealing plates, L-shaped fixed steel bars and reserved grouting steel pipe holes. The connector is prefabricated and welded in the factory, and then expanded with the thread on site. The body steel piles are welded to form a rigid connection.
The connection quality and construction efficiency of threaded enlarged steel piles and crown beams are improved, the problems of insufficient operating space and unreliable connections are solved, and the formation of rigid connections is ensured.
Smart Images
Figure CN222500222U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of building construction, in particular to a novel prefabricated connection piece for the top of a steel pile with a threaded enlarged body. Background Art
[0002] With the deepening of urban modernization, underground space is being utilized more and more fully, and the scale of foundation pits is also getting larger and larger. In most cases, the cantilever support structure is no longer able to meet the requirements of foundation pit retaining projects under poor working conditions. With the continuous development and improvement of geotechnical engineering, construction units have become more and more stringent in their requirements for temporary structures such as foundation pit support. On the one hand, high standards are required to meet the requirements of standard design, and on the other hand, foundation pit support structures need to be economical and efficient to avoid excessive waste of resources. Therefore, threaded expanded steel pile support structures have gradually entered the field of vision of foundation pit projects and opened up the retaining structure market.
[0003] The threaded expanded steel pile structure is mainly composed of a flange, a steel pipe, a threaded expanded head and a pile tip. The pile sinking construction is carried out by using an improved long-arm excavator and a fully automatic hydraulic screwing power head. The threaded expanded head at the front end can significantly improve the single pile bearing capacity of the threaded expanded steel pile, and the bearing capacity can be further improved by grouting the pile end through the grouting pipe. At the same time, the threaded expanded steel pile is low in cost and can be dismantled and recycled after the conditions for dismantling the support are met. It has a wide range of applications in actual projects. At present, according to the actual engineering application, after the threaded expanded steel pile is sunk to the design elevation, the crown beam reinforcement must be tied. The threaded expanded steel pile area has a small operating space. It is extremely inconvenient for reinforcement workers to tie the reinforcement in this area. Therefore, it is urgent to improve the connection between the threaded expanded steel pile and the crown beam area.
[0004] In the connection processing of conventional threaded expanded steel piles and crown beams, the operator needs to first weld a circular sealing plate, the size of which matches the pipe diameter of the threaded expanded steel pile. This is mainly to seal the end of the threaded expanded steel pile to prevent commercial concrete from entering the interior of the threaded expanded steel pile when the crown beam is cast. On the one hand, it will cause material waste, and on the other hand, it will increase the deadweight of the threaded expanded steel pile, and increase the difficulty of construction when dismantling the support later. Then, the conventional practice requires welding short-circuited steel bars at equal distances around the interface between the side of the threaded expanded steel pile and the crown beam, so as to improve the friction and bite force between the threaded expanded steel pile and the crown beam concrete in the later stage. However, due to the small contact area between the short-circuited steel bars and the concrete, the bite is not tight, resulting in an unreliable connection. In addition, the operating space is small, the construction space is insufficient, the operator's welding efficiency is low, and it is time-consuming and laborious. Therefore, a new prefabricated connector for the top of the threaded expanded steel pile is proposed to address the above problems. Utility Model Content
[0005] The utility model aims to provide a novel prefabricated connection piece for the top of a steel pile with a threaded enlarged body, so as to solve the problems raised in the above-mentioned background technology.
[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0007] As an optional solution of the novel prefabricated connection piece for the top of a steel pile with a threaded enlarged body described in the utility model, wherein: a novel prefabricated connection piece for the top of a steel pile with a threaded enlarged body comprises a guard pile, a fully automatic hydraulic rod screwing device, a power head and a drilling piece, wherein the guard pile is arranged below the ground, a power head is installed at one end of the fully automatic hydraulic rod screwing device, and a drilling piece is installed inside the power head;
[0008] The drilling member includes a screw rod, a threaded enlarged steel pile enlarged head and a pile tip, wherein the pile tip is arranged at one end of the screw rod, and a threaded enlarged steel pile enlarged head evenly distributed is also installed on the outside of the screw rod, and the drilling member includes the other end of the screw rod connected to the power head;
[0009] After the screw rod completes the drilling work, a pile top prefabricated connector is installed on the top of the screw rod;
[0010] The pile top prefabricated connector includes a sealing plate, the outer side of which is fixedly connected with evenly distributed fixed steel bars, a reserved grouting steel pipe channel is opened in the center of the sealing plate, and the sealing plate is located at the top of the screw rod and is welded to the screw rod.
[0011] In the connection between the conventional threaded expanded steel pile and the crown beam, the operator needs to weld a circular sealing plate first. The conventional method requires welding short-circuited steel bars at equal distances around the interface between the side of the threaded expanded steel pile and the crown beam, so as to improve the friction and bite force between the threaded expanded steel pile and the crown beam concrete in the later stage. However, due to the small contact area between the short-circuited steel bars and the concrete, the bite is not tight, resulting in an unreliable connection. In addition, the operating space is small, the construction space is insufficient, the operator's welding efficiency is low, and it is time-consuming and labor-intensive. The device first completes the construction of the vertical support structure system; according to the actual engineering geological conditions and design requirements, the threaded expanded steel pile is sunk to the designed elevation; the excavator cooperates with the fully automatic hydraulic screwing machine to lift the threaded expanded steel pile to the designed pile position; the surveying engineer verifies the pile position; the construction personnel remove the matching flanges, latches and other accessories; the prefabricated steel bar connector and the threaded expanded steel pile are welded into a whole; the crown beam steel bar binding and concrete pouring are completed, and then the connector is welded to the drilling piece. It is mainly composed of a sealing plate and several L-shaped fixed steel bars. First, a sealing plate of the same size as the steel pile is prefabricated in the factory, and several L-shaped fixed steel bars are equidistantly welded to the sealing plate, with a weld height hf≥8mm, single-sided welding: the weld length is not less than 10d, double-sided welding is not less than 5d, and the L-shaped steel bar extension length is not less than 35d. Then, the sealing plate position of the above-mentioned prefabricated steel bar connector is welded to the top of the threaded enlarged steel pile, that is, the connection construction of the crown beam and the threaded enlarged steel pile is completed, and then commercial concrete is poured to form a rigid connection; the use of the new prefabricated steel bar connector developed above can solve the related problems that are prone to occur during actual on-site construction, mainly including: on the one hand, the operating space in the connection area between the crown beam and the threaded enlarged steel pile on site is insufficient, and the construction efficiency is low, while the prefabricated steel bar connector only needs to weld the sealing plate to the pile top, which is convenient to operate; on the other hand, on-site welding of connectors will make it difficult to ensure the construction quality. The use of this type of prefabricated connector can effectively ensure the rigid connection between the threaded enlarged steel pile and the crown beam.
[0012] As an optional solution for the novel prefabricated connection piece for the top of a steel pile with a threaded enlarged body described in the utility model, one side of the pile tip is arranged in a pointed shape.
[0013] As an optional solution for the novel prefabricated connection piece for the top of a steel pile with a threaded enlarged body described in the utility model, the number of the fixed steel bars is 10, and the fixed steel bars are evenly distributed around the sealing plate.
[0014] As an optional solution for the novel prefabricated connection piece for the top of a steel pile with a threaded enlarged body described in the utility model, the sealing plates are all arranged in an L-shape.
[0015] As an optional solution of the novel thread-enlarged steel pile top prefabricated connector described in the utility model, the diameter of the sealing plate is consistent with the diameter of the screw.
[0016] One side of the pile tip is pointed, which helps the screw to drill into the soil. The number of fixed steel bars is multiple groups and is L-shaped. At this time, the connection area can be expanded outward. And because it is prefabricated in advance, the connection efficiency and quality can be greatly improved. The sealing plate is consistent with the diameter of the screw. This is mainly to seal the end of the threaded expanded steel pile to prevent commercial concrete from entering the threaded expanded steel pile when the crown beam is poured. On the one hand, it will cause waste of materials, and on the other hand, it will increase the deadweight of the threaded expanded steel pile, which will increase the difficulty of construction when dismantling the support later.
[0017] Compared with the prior art, the beneficial effects of the utility model are:
[0018] The utility model develops a prefabricated steel bar connector, which is mainly composed of a sealing plate and a plurality of L-shaped steel bars. First, a sealing plate of the same size as a steel pile is prefabricated in a factory, and a plurality of L-shaped steel bars are equidistantly welded to the sealing plate, and then the sealing plate position of the prefabricated steel bar connector is welded to the top of the threaded enlarged body steel pile, that is, the connection construction of the crown beam and the threaded enlarged body steel pile is completed, and then commercial concrete is poured to form a rigid connection; the use of the new prefabricated steel bar connector developed above can solve related problems that are prone to occur during actual on-site construction, mainly including: on the one hand, the operating space in the connection area between the on-site crown beam and the threaded enlarged body steel pile is insufficient, and the construction efficiency is low, while the prefabricated steel bar connector only needs to weld the sealing plate to the pile top, and the operation is convenient; on the other hand, on-site welding of connectors will make it difficult to ensure the construction quality, and the use of this prefabricated connector can effectively ensure the rigid connection between the threaded enlarged body steel pile and the crown beam. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0020] Figure 2 It is a top view of the prefabricated connection piece on the top of the pile of the utility model;
[0021] Figure 3 It is a front view of the prefabricated connecting piece on the top of the pile of the utility model.
[0022] In the figure: 1. Guard pile; 2. Fully automatic hydraulic screwing equipment; 3. Power head; 4. Screw; 5. Threaded enlarged steel pile enlarged head; 6. Pile tip; 7. Prefabricated connector on the top of the pile; 701. Sealing plate; 702. Reserved grouting steel pipe channel; 703. Fixed steel bars. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0024] Example 1
[0025] See also Figure 1 , Figure 2 and Figure 3 , the utility model provides a technical solution:
[0026] A novel prefabricated connection piece for the top of a threaded enlarged steel pile, comprising a retaining pile 1, a fully automatic hydraulic rod screwing device 2, a power head 3 and a drilling piece, wherein the retaining pile 1 is arranged below the ground, the power head 3 is installed at one end of the fully automatic hydraulic rod screwing device 2, and a drilling piece is installed inside the power head 3;
[0027] The drilling member includes a screw rod 4, a threaded enlarged steel pile enlarged head 5 and a pile tip 6. The pile tip 6 is arranged at one end of the screw rod 4. The outer side of the screw rod 4 is also equipped with a threaded enlarged steel pile enlarged head 5 evenly distributed. The drilling member includes the other end of the screw rod 4 connected to the power head 3.
[0028] After the screw rod 4 completes the drilling work, a pile top prefabricated connector 7 is installed on the top of the screw rod 4;
[0029] The pile top prefabricated connector 7 includes a sealing plate 701, the outer side of which is fixedly connected with evenly distributed fixed steel bars 703, a reserved grouting steel pipe channel 702 is opened in the center of the sealing plate 701, and the sealing plate 701 is located at the top of the screw rod 4 and is welded to the screw rod 4.
[0030] In the connection between the conventional threaded expanded steel pile and the crown beam, the operator needs to weld a circular sealing plate first. The conventional method requires welding short-circuited steel bars at equal distances around the interface between the side of the threaded expanded steel pile and the crown beam, so as to improve the friction and bite force between the threaded expanded steel pile and the crown beam concrete in the later stage. However, due to the small contact area between the short-circuited steel bars and the concrete, the bite is not tight, resulting in an unreliable connection. In addition, the operating space is small, the construction space is insufficient, the operator's welding efficiency is low, and it is time-consuming and laborious. The present device, first of all, is complete. The construction of the vertical support structure system; according to the actual engineering geological conditions and design requirements, the threaded enlarged steel pile is sunk to the designed elevation; the threaded enlarged steel pile is lifted to the designed pile position by the excavator and the fully automatic hydraulic screwing machine modified CAT345D; the surveying engineer verifies the pile position; the construction personnel remove the matching flanges, latches and other accessories; the prefabricated steel bar connector and the threaded enlarged steel pile are welded into a whole; the crown beam steel bar is tied and the concrete is poured, and then the connector is welded to the drilling piece. The connector is mainly composed of a sealing plate. 701, a plurality of L-shaped fixed steel bars 703, firstly, a sealing plate 701 of the same size as the steel pile is prefabricated in the factory, and a plurality of L-shaped fixed steel bars 703 are welded to the sealing plate 701 at equal intervals, with a weld height hf ≥ 8mm, a single-sided welding: a weld length of not less than 10d, a double-sided welding: not less than 5d, and an L-shaped steel bar extension length of not less than 35d, then the sealing plate 701 position of the above-mentioned prefabricated steel bar connector is welded to the top of the threaded enlarged steel pile, that is, the connection construction between the crown beam and the threaded enlarged steel pile is completed, and then the cast Build commercial concrete to form a rigid connection; the use of the new prefabricated steel bar connector developed above can solve the related problems that are prone to occur during actual on-site construction, mainly including: on the one hand, there is insufficient operating space in the connection area between the on-site crown beam and the threaded enlarged steel pile, and the construction efficiency is low, while the prefabricated steel bar connector only needs to weld the sealing plate 701 to the pile top, which is convenient to operate; on the other hand, on-site welding of connectors will make it difficult to ensure the construction quality. The use of this prefabricated connector can effectively ensure the rigid connection between the threaded enlarged steel pile and the crown beam.
[0031] Example 2
[0032] This embodiment is an improvement on embodiment 1. Figure 2 and Figure 3 Specifically, one side of the pile tip 6 is arranged to be pointed.
[0033] The number of the fixing steel bars 703 is 10, and the fixing steel bars 703 are evenly distributed around the sealing plate 701.
[0034] The sealing plates 701 are all arranged in an L shape.
[0035] The diameter of the sealing plate 701 is consistent with the diameter of the screw 4 .
[0036] One side of the pile tip 6 is set with a pointed end, which helps the screw 4 to drill into the soil, and the number of fixed steel bars 703 is multiple groups, and they are set in an L shape. At this time, the connection area can be expanded outward, and because it is prefabricated in advance, the connection efficiency and connection quality can be greatly improved. The sealing plate 701 is consistent with the diameter of the screw 4. This is mainly to seal the end of the threaded expanded steel pile to prevent commercial concrete from entering the threaded expanded steel pile when the crown beam is poured. On the one hand, it will cause material waste, and on the other hand, it will cause the self-weight of the threaded expanded steel pile to increase, and the construction difficulty will increase when the support is removed later.
[0037] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0038] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A new type of prefabricated connector for the top of a threaded enlarged steel pile, comprising a retaining pile, a fully automatic hydraulic rod screwing device, a power head and a drilling piece, wherein the retaining pile is arranged below the ground, a power head is installed at one end of the fully automatic hydraulic rod screwing device, and a drilling piece is installed inside the power head; Features: The drilling member includes a screw rod, a threaded enlarged steel pile enlarged head and a pile tip, wherein the pile tip is arranged at one end of the screw rod, and a threaded enlarged steel pile enlarged head evenly distributed is also installed on the outside of the screw rod, and the drilling member includes the other end of the screw rod connected to the power head; After the screw rod completes the drilling work, a pile top prefabricated connector is installed on the top of the screw rod; The pile top prefabricated connector includes a sealing plate, the outer side of which is fixedly connected with evenly distributed fixed steel bars, a reserved grouting steel pipe channel is opened in the center of the sealing plate, and the sealing plate is located at the top of the screw rod and is welded to the screw rod.
2. The novel thread-enlarged steel pile top prefabricated connector according to claim 1 is characterized in that: One side of the pile tip is arranged in a pointed shape.
3. The novel thread-enlarged steel pile top prefabricated connector according to claim 1 is characterized in that: The number of the fixed steel bars is 10, and the fixed steel bars are evenly distributed around the sealing plate.
4. The novel thread-enlarged steel pile top prefabricated connector according to claim 1 is characterized in that: The sealing plates are all arranged in an L shape.
5. The novel thread-enlarged steel pile top prefabricated connector according to claim 1 is characterized in that: The diameter of the sealing plate is consistent with the diameter of the screw.