Casing pipe drilling pouring type steel pipe pile pier structure

Abstract

The utility model provides a sleeve drilling pouring type steel pipe pile pier structure which comprises a pier column steel pipe, a concrete pile poured in a pile hole and a steel pipe pile poured in the concrete pile, and the upper end of the steel pipe pile exceeds the concrete pile. The upper end of the steel pipe pile and the lower end of the pier column steel pipe are welded together through a first welding ring formed by welding, and the first welding ring extends in the circumferential direction of the pier column steel pipe. The utility model aims to provide a sleeve drilling pouring type steel pipe pile pier structure, and provides a new structure for knocking a pier all the time.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, and in particular to a casing-drilled cast-in-place steel pipe pile pier structure. Background Technology

[0002] During bridge construction, underground foundation piles need to be connected to surface piers to support the bridge deck. Current methods involve drilling holes in the ground, inserting underground reinforcing cages, injecting concrete into the holes to form the piles, with the underground reinforcing cages protruding above ground. Then, surface reinforcing cages are connected to the underground cages, and concrete is poured onto the surface cages to form the piers. This method has several drawbacks: it is time-consuming; the concrete cannot repeatedly fill the inner and outer parts of the underground reinforcing cages, resulting in voids within the piles; the soil around the borehole walls easily seeps into the concrete, leading to wasted concrete and poor pile quality; and coaxial alignment of the underground and above-ground sections is inconvenient. Utility Model Content

[0003] The present invention aims to provide a casing-drilled cast-in-place steel pipe pile pier structure, which provides a new structure for continuous pier construction.

[0004] To achieve the above objectives, this utility model employs the following technology: a casing-drilled cast-in-place steel pipe pile pier structure, characterized in that it includes a pier steel pipe, a concrete pile cast in a pile hole, and a steel pipe pile cast in the concrete pile. The upper end of the steel pipe pile extends beyond the concrete pile, and the upper end of the steel pipe pile is welded to the lower end of the pier steel pipe through a first welding ring formed by welding. The first welding ring extends circumferentially along the pier steel pipe. This facilitates the connection between the underground section (concrete pile and steel pipe pile) and the above-ground section (pier steel pipe).

[0005] Preferably, the system also includes a reinforcing ring inserted at its lower end inside the steel pipe pile. The reinforcing ring is welded together with a second welded ring formed by welding, and the lower end of the pier steel pipe is fitted onto the reinforcing ring. This provides better connection strength between the pier steel pipe and the steel pipe pile, and facilitates docking and positioning during manufacturing.

[0006] Preferably, the second welding ring extends upwards beyond the upper end face of the steel pipe pile, and the lower end face of the pier steel pipe is supported on the second welding ring. The second welding ring and the first welding ring are welded together. This improves the reliability of the connection.

[0007] Preferably, the reinforcing ring is welded to the pier steel pipe using solder. This provides good reliability during connection and allows for easy fixation of the reinforcing ring to the pier steel pipe.

[0008] Preferably, the inner circumferential surface of the pier steel pipe is provided with an inner annular groove extending circumferentially along the pier steel pipe, and the outer circumferential surface of the reinforcing ring is provided with an outer annular groove extending circumferentially along the reinforcing ring. The solder is located within the inner and outer annular grooves. This ensures good connection reliability.

[0009] Preferably, an inner chamfer is formed between the inner circumferential surface and the upper end surface of the steel pipe pile, and the inner chamfer and the reinforcing ring form an annular groove, with the second welding ring filling the annular groove. This results in good connection reliability.

[0010] Preferably, the system also includes four reinforcing ribs, the lower ends of which are welded to the outer surface of the steel pipe pile, and the upper ends of which are welded to the outer circumferential surface of the pier steel pipe. This ensures good connection strength.

[0011] Preferably, the reinforcing ribs are evenly distributed along the circumference of the pier steel pipe.

[0012] Preferably, an outer chamfer is formed between the outer circumferential surface and the lower end surface of the pier steel pipe, and the first welding ring extends to the outer chamfer. This results in good connection strength. Beneficial effects include: convenient and quick fabrication; reliable connection between the upper and lower sections. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the present invention;

[0014] Figure 2 for Figure 1 A magnified view of part B. In the figure: pile hole 5, concrete pile 8, steel pipe pile 11, pier steel pipe 13, reinforcing ring 17, second welding ring 18, first welding ring 19, reinforcing rib 20, inner annular groove 21, outer annular groove 22, tin ring 23, inner chamfer 37, outer chamfer 38. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] See Figure 1 and Figure 2A casing-drilled cast-in-place steel pipe pile pier structure includes a pier steel pipe 13, a concrete pile cast in a pile hole 5, and a steel pipe pile 8 cast in the concrete pile. The upper end of the steel pipe pile extends beyond the concrete pile, and the upper end of the steel pipe pile is welded to the lower end of the pier steel pipe to form a first welding ring 19, which extends circumferentially along the pier steel pipe. It also includes a reinforcing ring 17 with its lower end inserted inside the steel pipe pile. The reinforcing ring is welded to a second welding ring 18, and the lower end of the pier steel pipe is fitted onto the reinforcing ring. The upward-facing end of the second welding ring extends beyond the upper end face of the steel pipe pile, and the lower end face of the pier steel pipe is supported on the second welding ring. The second welding ring and the first welding ring are welded together. The reinforcing ring is welded to the pier steel pipe with solder 23. The inner circumferential surface of the pier steel pipe has an inner annular groove 21 extending circumferentially along the pier steel pipe, and the outer circumferential surface of the reinforcing ring has an outer annular groove 22 extending circumferentially along the reinforcing ring. The solder is located in the inner and outer annular grooves. An inner chamfer 37 is formed between the inner circumferential surface and the upper end surface of the steel pipe pile, and the inner chamfer and the reinforcing ring form an annular groove, which is filled by a second welding ring. It also includes four reinforcing ribs 20, the lower ends of which are welded to the outer surface of the steel pipe pile, and the upper ends of which are welded to the outer circumferential surface of the pier steel pipe. The reinforcing ribs are evenly distributed circumferentially along the pier steel pipe. An outer chamfer 38 is formed between the outer circumferential surface and the lower end surface of the pier steel pipe, and the first welding ring extends to the outer chamfer.

[0017] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A casing-drilled cast-in-place steel pipe pile pier structure, characterized in that, The system includes a steel pipe pier, a concrete pile cast into a pile hole, and a steel pipe pile cast into the concrete pile. The upper end of the steel pipe pile extends beyond the concrete pile. The upper end of the steel pipe pile is welded to the lower end of the steel pipe pier by welding to form a first welding ring, which extends circumferentially along the steel pipe pier.

2. The casing-drilled cast-in-place steel pipe pile pier structure according to claim 1, characterized in that, It also includes a reinforcing ring with its lower end inserted inside the steel pipe pile. The reinforcing ring is welded together with a second welded ring formed by welding. The lower end of the pier steel pipe is sleeved on the reinforcing ring.

3. The casing-drilled cast-in-place steel pipe pile pier structure according to claim 2, characterized in that, The second welding ring extends upward beyond the upper end face of the steel pipe pile, and the lower end face of the pier steel pipe is supported on the second welding ring. The second welding ring and the first welding ring are welded together.

4. A casing-drilled cast-in-place steel pipe pile pier structure according to claim 2 or 3, characterized in that, The reinforcing ring is welded to the steel pipe of the pier column by soldering.

5. A casing-drilled cast-in-place steel pipe pile pier structure according to claim 4, characterized in that, The inner circumferential surface of the pier steel pipe is provided with an inner annular groove extending circumferentially along the pier steel pipe, and the outer circumferential surface of the reinforcing ring is provided with an outer annular groove extending circumferentially along the reinforcing ring. The solder is located in the inner annular groove and the outer annular groove.

6. A casing-drilled cast-in-place steel pipe pile pier structure according to claim 2 or 3, characterized in that, An inner chamfer is formed between the inner circumferential surface and the upper end surface of the steel pipe pile, and the inner chamfer and the reinforcing ring form an annular groove, with the second welding ring filling the annular groove.

7. A casing-drilled cast-in-place steel pipe pile pier structure according to claim 1, 2, or 3, characterized in that, It also includes four reinforcing ribs, the lower ends of which are welded to the outer surface of the steel pipe pile, and the upper ends of which are welded to the outer circumferential surface of the pier steel pipe.

8. A casing-drilled cast-in-place steel pipe pile pier structure according to claim 7, characterized in that, The reinforcing ribs are evenly distributed along the circumference of the steel pipe of the pier column.

9. A casing-drilled cast-in-place steel pipe pile pier structure according to claim 1, 2, or 3, characterized in that, An outer chamfer is formed between the outer circumferential surface and the lower end surface of the pier steel pipe, and the first welding ring extends to the outer chamfer.

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