Prestressed pipe pile head extension connecting structure
Through modular components and rapid installation methods, the problems of complex and unstable extension construction of prestressed pipe piles are solved, and efficient and stable extension connections of pipe pile piles are achieved.
Patent Information
- Application Number
- CN202422748246.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-12
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-11-12
AI Technical Summary
The traditional prestressed pipe pile extension method has complex construction, long cycle, and the connection structure is not stable enough, making it difficult to meet engineering needs.
Modular components and quick installation methods are adopted to achieve the extension connection of the pipe pile head by connecting the base, upper end plate of steel bars, pre-tightening upper plate, cast outer mold cylinder and cast inner mold cylinder by using bolts and nuts.
It improves construction efficiency, shortens the project cycle, and enhances the stability and adaptability of the connecting structure.
Smart Images
Figure CN223293030U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of pipe pile construction, in particular to a prestressed pipe pile head extension connection structure. Background Art
[0002] With the continuous development of modern architecture and infrastructure, prestressed pipe piles, as a key foundational engineering component, are widely used in projects such as bridges, high-rise buildings, and large industrial facilities. Prestressed pipe piles enhance their load-bearing capacity through pre-applied stress, thereby improving the stability and durability of the structure. However, during actual construction, various factors, such as design changes, geological variations, construction errors, settlement issues, or maintenance and reinforcement, may necessitate the extension and connection of installed prestressed pipe piles.
[0003] Traditional prestressed pile extension methods often involve complex construction techniques and long construction periods, which not only increases project costs but also potentially compromises quality and safety. Furthermore, existing extension connection structures often lack sufficient stability and reliability to meet increasingly stringent engineering standards.
[0004] Therefore, developing a prestressed pipe pile head extension connection structure with simple structure, quick installation, high stability and strong adaptability has become an urgent problem to be solved in the industry. Utility Model Content
[0005] The purpose of the utility model is to provide a prestressed pipe pile head extension connection structure, which improves the construction efficiency of the pipe pile head extension and shortens the project period through modular components and a quick installation method.
[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:
[0007] The utility model is a prestressed pipe pile head extension connection structure, comprising a connection base, a steel bar upper end plate, a pre-tightening upper plate, a casting outer mold cylinder, a casting inner mold cylinder and reinforcement; the connection base is welded on the prestressed pipe pile head; the casting outer mold cylinder and the casting inner mold cylinder are coaxially arranged and plugged into the connection base; the reinforcement is connected and installed on the connection base and the steel bar upper end plate; the pre-tightening upper plate is clamped and installed on the upper end of the casting outer mold cylinder; bolts and nuts for pre-tightening the reinforcement are installed between the steel bar upper end plate and the pre-tightening upper plate.
[0008] As an optimal technical solution of the present invention, the connecting base includes a circular base plate; the circular base plate is fixed with a first cylinder which is plugged into the lower end of the casting inner mold cylinder; the inner ring surface of the circular base plate is fixed with a support rod for supporting the casting inner mold cylinder; the circular base plate is provided with a number of long circular holes for auxiliary welding; the upper surface of the circular base plate is fixed with a second cylinder which is matched with the casting outer mold cylinder; the upper surface of the circular base plate is fixed with a circle of evenly distributed column rods; the upper ends of a circle of the column rods are commonly fixed with a first circular plate; the first circular plate is provided with a number of first circular through holes which are matched with the reinforcement.
[0009] As an optimal technical solution of the present invention, the upper end plate of the steel bar includes a second circular ring plate; the second circular ring plate is provided with a plurality of second circular through holes that cooperate with the reinforcement; the second circular ring plate is provided with at least four third circular through holes for passing the bolts in the bolts and nuts.
[0010] As an optimal technical solution of the present invention, the pre-tightening upper plate includes a third circular ring plate; the third circular ring plate is provided with at least four fourth circular through holes for passing the bolts in the bolts and nuts, and the number of the fourth circular through holes corresponds to the same as the number of the third circular through holes; the lower surface of the third circular ring plate is fixed with a third cylinder that is plugged into the upper end of the casting outer mold cylinder.
[0011] As an optimal technical solution of the present invention, the casting outer mold cylinder includes two solid semi-circular arc plates; rectangular strips are symmetrically fixed on the outer walls of the two ends of the solid semi-circular arc plates along the axial direction; a number of threaded through holes are opened on the rectangular strips; the two solid semi-circular arc plates are connected as one by two rows of bolts.
[0012] As a preferred technical solution of the present invention, the casting inner mold cylinder includes two cavity semi-circular arc plates; the upper ends of the cavity semi-circular arc plates are provided with hanging holes.
[0013] The utility model has the following beneficial effects:
[0014] This new design provides a stable support base by welding the connecting base to the prestressed pile head. The outer and inner casting molds are coaxially mounted and plugged into the connecting base, creating a closed casting space. The reinforcement connection is installed between the connecting base and the upper plate of the reinforcement, and pre-tightened with bolts and nuts ensures prestressing of the new pile after concrete pouring. The pre-tightening upper plate snaps onto the upper end of the outer casting mold, further enhancing the stability of the structure.
[0015] The outer and inner casting molds of this utility model feature a quick-dismantle design. The outer casting mold consists of two solid semicircular plates connected by bolts; the inner casting mold consists of two hollow semicircular plates that can be quickly lifted via lifting holes. These features make the entire structure not only easy to install and remove, but also convenient for subsequent maintenance and replacement.
[0016] The utility model significantly improves construction efficiency and shortens engineering period through modular components and quick installation method.
[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0019] Figure 1 This is a structural schematic diagram of the prestressed pipe pile head extension connection structure of the utility model.
[0020] Figure 2 for Figure 1 Schematic diagram of the axial section.
[0021] Figure 3 for Figure 2 A partial enlarged view of point A in the middle.
[0022] Figure 4 for Figure 2 A partial enlarged view of point B in the middle.
[0023] Figure 5 A schematic diagram of the structure of the connection base.
[0024] Figure 6 This is a structural diagram of the upper end plate of the steel bar.
[0025] Figure 7 It is a structural diagram of the pre-tightening upper plate.
[0026] Figure 8 Schematic diagram of the structure of the casting outer mold cylinder.
[0027] Figure 9 Schematic diagram of the structure of the casting inner mold cylinder.
[0028] In the accompanying drawings, the components represented by the reference numerals are as follows:
[0029] 1-connecting base, 2-rebar upper end plate, 3-pretightening upper plate, 4-casting outer mold cylinder, 5-casting inner mold cylinder, 6-reinforcement, 7-bolts and nuts, 11-annular base plate, 12-first cylinder, 13-bracket rod, 14-long circular hole, 15-second cylinder, 16-column rod, 17-first annular plate, 18-first circular through hole, 21-second annular plate, 22-second circular through hole, 23-third circular through hole, 31-third annular plate, 32-fourth circular through hole, 33-third cylinder, 41-solid semicircular plate, 42-rectangular slats, 43-bolts, 51-cavity semicircular plate, 52-hanging hole. DETAILED DESCRIPTION
[0030] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Specific embodiment one:
[0032] See also Figure 1-9 As shown, the utility model is a prestressed pipe pile head extension connection structure, comprising a connection base 1, a steel bar upper end plate 2, a pre-tightening upper plate 3, a casting outer mold tube 4, a casting inner mold tube 5 and reinforcement 6. The connection base 1 is welded to the prestressed pipe pile head. The casting outer mold tube 4 and the casting inner mold tube 5 are coaxially arranged and plugged into the connection base 1. The reinforcement 6 is connected and installed on the connection base 1 and the steel bar upper end plate 2. The pre-tightening upper plate 3 is snap-fitted to the upper end of the casting outer mold tube 4. Bolts and nuts 7 for pre-tightening the reinforcement 6 are installed between the steel bar upper end plate 2 and the pre-tightening upper plate 3.
[0033] The connecting base 1 includes a circular base plate 11. A first cylinder 12 is fixed to the circular base plate 11, which plugs into the lower end of the inner casting mold 5. A support rod 13 for supporting the inner casting mold 5 is fixed to the inner ring surface of the circular base plate 11. The circular base plate 11 is provided with several oblong holes 14 for auxiliary welding. A second cylinder 15 is fixed to the upper surface of the circular base plate 11, which cooperates with the outer casting mold 4. A circle of evenly distributed column rods 16 is fixed to the upper surface of the circular base plate 11. A first circular plate 17 is fixed to the upper ends of the circle of column rods 16. The first circular plate 17 is provided with several first circular through holes 8 that cooperate with the reinforcement 6. The oblong holes 14 provided on the connecting base 1 facilitate the use of electric welding to secure the connecting base 1 to the iron plate of the prestressed pipe pile head that has been driven into the ground. The connecting base 1 limits the bottom of the outer casting mold 4 and the inner casting mold 5 and provides stable support.
[0034] The upper end plate 2 of the steel bar includes a second circular plate 21. The second circular plate 21 is provided with a plurality of second circular through holes 22 for matching with the reinforcement 6. The second circular plate 21 is provided with at least four third circular through holes 23 for passing the bolts in the bolts and nuts 7.
[0035] The reinforcement bars 6 are installed between the connection base 1 and the upper end plate 2 of the steel bar, with the ends of the reinforcement bars 6 fixed with stoppers. This ensures that the distance between the connection base 1 and the upper end plate 2 of the steel bar is the same, so that when the upper end plate 2 of the steel bar is connected and pre-tightened with the pre-tightening upper plate 3 via bolts and nuts 7, the multiple reinforcement bars 6 can be pre-stressed uniformly.
[0036] Among them, the pre-tightening upper plate 3 includes a third circular plate 31. The third circular plate 31 is provided with at least four fourth circular through holes 32 for passing the bolts in the bolts and nuts 7, and the number of the fourth circular through holes 32 corresponds to the same as the number of the third circular through holes 23. A third cylinder 33 is fixed to the lower surface of the third circular plate 31, which is plugged into the upper end of the casting outer mold cylinder 4. The bolts in the bolts and nuts 7 are passed through the upper end plate 2 of the steel bar and the pre-tightening upper plate 3 in sequence from the bottom of the upper end plate 2 of the steel bar, and then the nuts are screwed on. The upper end plate 2 of the steel bar is pulled upward by rotating the nuts in the bolts and nuts 7 to pre-tighten the reinforcement 6 between the connecting base 1 and the upper end plate 2 of the steel bar. At the same time, the pre-tightening upper plate 3 is subjected to the downward force to press the casting outer mold cylinder 4 stably on the connecting base 1, and the connecting base 1, the upper end plate 2 of the steel bar, the pre-tightening upper plate 3, the casting outer mold cylinder 4 and the reinforcement 6 are combined into a stable structure. After the casting inner mold cylinder 5 is inserted, concrete can be poured. After the concrete solidifies, a fixedly connected prestressed new pipe pile is formed above the pile head of the original prestressed pipe pile, realizing the extension of the inserted underground pipe pile to meet the construction requirements.
[0037] To facilitate quick removal of the outer casting mold barrel 4, it comprises two solid semicircular plates 41. Rectangular strips 42 are symmetrically fixed to the outer walls of each of the solid semicircular plates 41 along the axial direction. The rectangular strips 42 have several threaded holes. The two solid semicircular plates 41 are connected together by two rows of bolts 43. After the new pile is formed, the two rows of bolts 43 can be removed to allow the two solid semicircular plates 41 to be removed.
[0038] To facilitate removal of the casting inner mold barrel 5 after the new pile is formed, the casting inner mold barrel 5 includes two hollow semi-circular plates 51. Lifting holes 52 are defined at the upper ends of the hollow semi-circular plates 51. Using a crane hook, the casting inner mold barrel 5 can be lifted upward through the lifting holes 52 at the upper ends of the hollow semi-circular plates 51 to quickly and easily remove the casting inner mold barrel 5.
[0039] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
[0040] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments do not describe all details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.
Claims
1. A prestressed pipe pile head extension connection structure, characterized by: It comprises a connection base (1), a steel bar upper end plate (2), a pre-tightening upper plate (3), a casting outer mold cylinder (4), a casting inner mold cylinder (5) and reinforcement (6); the connection base (1) is welded to the prestressed pipe pile head; The outer casting mold cylinder (4) and the inner casting mold cylinder (5) are coaxially arranged and plugged into the connection base (1); the reinforcement (6) is connected and installed on the connection base (1) and the upper end plate (2) of the reinforcement; The pre-tightening upper plate (3) is mounted on the upper end of the casting outer mold cylinder (4); bolts and nuts (7) for pre-tightening the reinforcement (6) are installed between the upper end plate (2) of the reinforcement bar and the pre-tightening upper plate (3).
2. The prestressed pipe pile head extension connection structure according to claim 1, characterized in that: The connecting base (1) includes a circular base plate (11); a first cylinder (12) plug-fitted with the lower end of the casting inner mold cylinder (5) is fixed to the circular base plate (11); a support rod (13) for supporting the casting inner mold cylinder (5) is fixed to the inner ring surface of the circular base plate (11); the circular base plate (11) is provided with a plurality of long circular holes (14) for auxiliary welding; a second cylinder (15) matching with the casting outer mold cylinder (4) is fixed to the upper surface of the circular base plate (11); a circle of evenly distributed column rods (16) is fixed to the upper surface of the circular base plate (11); a first circular plate (17) is fixed to the upper ends of the circle of column rods (16); the first circular plate (17) is provided with a plurality of first circular through holes (8) matching with the reinforcement (6).
3. The prestressed pipe pile head extension connection structure according to claim 2, characterized in that: The steel bar upper end plate (2) comprises a second circular plate (21); the second circular plate (21) is provided with a plurality of second circular through holes (22) that cooperate with the reinforcement (6); and the second circular plate (21) is provided with at least four third circular through holes (23) for passing the bolts in the bolts and nuts (7).
4. The prestressed pipe pile head extension connection structure according to claim 3, characterized in that: The pre-tightening upper plate (3) includes a third circular plate (31); the third circular plate (31) is provided with at least four fourth circular through holes (32) for passing the bolts in the bolt nuts (7), and the number of the fourth circular through holes (32) is the same as that of the third circular through holes (23); a third cylinder (33) is fixed on the lower surface of the third circular plate (31) and is plugged into the upper end of the casting outer mold cylinder (4).
5. The prestressed pipe pile head extension connection structure according to claim 4, characterized in that: The casting outer mold cylinder (4) comprises two solid semicircular plates (41); rectangular strips (42) are symmetrically fixed to the outer walls of both ends of the solid semicircular plates (41) along the axial direction; a plurality of threaded through holes are provided on the rectangular strips (42); and the two solid semicircular plates (41) are connected as a whole by two rows of bolts (43).
6. The prestressed pipe pile head extension connection structure according to claim 5, characterized in that: The casting inner mold cylinder (5) comprises two hollow semi-circular arc plates (51); the upper ends of the hollow semi-circular arc plates (51) are provided with hanging holes (52).