A double static pressure steel core prestressed concrete pipe pile
Patent Information
- Application Number
- CN202220933458.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2022-04-22
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2032-04-22
AI Technical Summary
Existing high-strength concrete prestressed pipe piles are difficult to pass through deep coarse sand layers due to insufficient pile sinking capabilities of pile driving machinery or insufficient pile body strength during pile driving, resulting in insufficient single pile bearing capacity.
The design of prestressed concrete pipe piles with double static pressure strips and steel cores is adopted. The strength and bearing capacity of the pile bodies are enhanced by arranging movable steel cores and bases between the pile bodies, and the connection is improved by welding connecting rods and plug-in slots. Stability and strength.
It improves the strength and bearing capacity of the pile body, enhances the stability and strength of the connection between the pile body and the pile body, and ensures that a higher bearing capacity can be achieved when passing through the sand layer.
Smart Images
Figure CN217710686U8_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of building engineering, and in particular to a double static pressure prestressed concrete pipe pile with steel core. Background Technology
[0002] Pipe piles are precast engineering piles used as foundation materials for buildings. Driven into the ground by a piling machine under specific geological conditions, they bear the load in buildings and structures. The main uses of pipe piles are twofold: one is to transfer the weight of the building above to the lower, more load-bearing soil layer, improving the stability of the building; the other is to compact soft soil layers, thereby increasing the bearing capacity of the foundation soil. Using pipe piles can significantly reduce foundation costs, and they also provide sufficient strength, therefore they are widely used in the foundation engineering of railways, highways and bridges, ports, docks, water conservancy, municipal works, buildings, and large equipment.
[0003] Prestressed concrete pipe piles have good pile body quality, strong controllable bearing capacity, and good ability to penetrate soil layers. However, to achieve higher single pile bearing capacity, or to penetrate deep coarse sand layers or other hard interlayers, the pile driving capacity of the piling machinery is required to be very high, and the bearing capacity of the precast pile body must also match. Both must be satisfied simultaneously. Prestressed concrete pipe piles have advantages such as relatively high single pile bearing capacity, low project cost, short construction period, strong penetration ability, and reliable pile quality, and have been widely used in actual engineering projects. However, after splicing, high-strength prestressed concrete pipe piles may have difficulty penetrating sand layers during pile driving due to insufficient pile driving capacity of the piling machinery or insufficient pile body strength, thus requiring a lower bearing capacity. Utility Model Content
[0004] This utility model provides a double static pressure prestressed concrete pipe pile with steel core to address the problems of the prior art.
[0005] This utility model provides a double static pressure prestressed concrete pipe pile with a steel core, which adopts the following technical solution:
[0006] A prestressed concrete pipe pile with double static pressure and steel core includes multiple pile sections and a steel core disposed between two adjacent pile sections. The steel core is movably inserted into the pile body, and a base is provided on the steel core, with the base located between two adjacent pile sections.
[0007] Preferably, the base is flush with the outer surface of the pile.
[0008] Preferably, the distance between the sidewall of the steel core and the inner wall of the pile body is in the range of 2-3 mm.
[0009] Preferably, the length of the steel core is in the range of 180-220mm, and the thickness of the base is in the range of 18-22mm.
[0010] Preferably, the base and the pile are connected by welding.
[0011] Preferably, the outer diameter of the pile body is in the range of 180-200mm, and the inner diameter of the pile body is in the range of 80-100mm.
[0012] Preferably, the base is provided with multiple connecting rods, and the end face of the pile is provided with a plug groove, and the connecting rods are plugged into the plug groove.
[0013] In summary, this utility model has at least one of the following beneficial technical effects:
[0014] 1. The upper end of the lower pile body is inserted into the steel core, and the lower end of the upper pile body is aligned with the steel core and inserted after calibration. The upper and lower pile bodies are connected by the steel core and the base in the middle of the steel core, and the outer ring is welded to form a whole. This improves the strength of the pile body and increases its bearing capacity.
[0015] 2. During pile splicing welding, the connecting rod is inserted into the splice groove, which can improve the stability of the upper and lower piles and increase the connection strength between adjacent pile sections after the splicing is completed. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this utility model.
[0017] Figure 2 This is a three-dimensional structural diagram of Embodiment 1 of the present utility model.
[0018] Figure 3 This is a schematic diagram of the combination of the pile body and the pile driver in Embodiment 1 of this utility model.
[0019] Figure 4 This is a schematic diagram of the overall structure of Embodiment 2 of this utility model.
[0020] In the diagram: 1. Pile body; 11. Insertion groove; 2. Steel core; 21. Base; 22. Connecting rod; 3. Hydraulic cylinder; 4. Outer sleeve; 5. Inner pressure rod. Detailed Implementation
[0021] The following is in conjunction with the appendix Figure 1-4 The present invention will be described in further detail below.
[0022] Example 1: This utility model discloses a double static pressure prestressed concrete pipe pile with steel core, such as... Figure 1-2As shown, the pile includes multiple pile sections 1 and a steel core 2 disposed between two adjacent pile sections 1. The pile section 1 is cylindrical and hollow, with both ends of the pile section 1 being open. The steel core 2 is cylindrical and is movably inserted into the pile section 1. A part of the steel core 2 is located inside the pile section 1, and the other part of the steel core 2 is located inside the adjacent pile section 1. A base 21 is welded onto the steel core 2. The base 21 is located in the middle of the steel core 2 and is circular. The base 21 is coaxial with the steel core 2 and is located between two adjacent pile sections 1. The opposite two side surfaces of the base 21 are respectively attached to the close end faces of the two adjacent pile sections 1. The edge of the base 21 is flush with the outer surface of the pile section 1. The base 21 and the pile section 1 are connected by welding.
[0023] Reference Figure 1 and Figure 2 The outer diameter of pile body 1 ranges from 180-200mm, and the inner diameter ranges from 80-100mm. In this embodiment, the outer diameter of pile body 1 is preferably 200mm, and the inner diameter is preferably 100mm. The length of steel core 2 ranges from 180-220mm, and the thickness of base 21 ranges from 18-22mm. In this embodiment, the length of steel core 2 is preferably 200mm, and the thickness of base 21 is preferably 20mm. The distance between the sidewall of steel core 2 and the inner wall of pile body 1 ranges from 2-3mm. In this embodiment, the distance between the sidewall of steel core 2 and the inner wall of pile body 1 is preferably 2.5mm.
[0024] Reference Figure 1 and Figure 3 In addition, a pile driver is required for pile driving. A hydraulic cylinder 3 is fixedly installed on the pile driver. An outer sleeve 4 is fixedly installed at the end of the hydraulic cylinder 3 closest to the pile body 1. The outer sleeve 4 fits against the top of the pile body 1. An inner pressure rod 5 is coaxially fixedly connected to the piston rod of the hydraulic cylinder 3, and the inner pressure rod 5 abuts against the pile body 1. During pile driving, the pile body 1 is first transported horizontally from the stacking point to the vicinity of the pile frame using a crane. Then, the pile is lifted into position using a specially designed pile-lifting hook and winch on the pile driver. After the pile body 1 is lifted to a vertical position, the pile head is fitted with the inherent pile feeder at the bottom of the hammer head, and then the pile tip is accurately placed on the pile position. The piston rod of the hydraulic cylinder 3 extends, applying pressure to the pile body 1 through the inner pressure rod 5, thereby driving the pile body 1 into the soil layer. The verticality of the pile body is then checked and adjusted. During pile splicing, first clean the lower pile section 1 with a steel brush, add a positioning plate, hoist the upper pile section 1, and place it on top of the lower pile section 1. Use the positioning plate to align the upper and lower piles concentrically. Simultaneously, use a theodolite on both sides of the front of the pile driver to check and adjust the verticality of the pile section 1. Straighten the upper pile section 1 to ensure the axes of the upper and lower pile sections 1 are aligned, and then weld the upper and lower pile sections 1 together.
[0025] The implementation principle of a prestressed concrete pipe pile with double static pressure and steel core 2 in this embodiment of the utility model is as follows: the upper end of the lower pile body 1 is inserted into the steel core 2, and the lower end of the upper pile body 1 is aligned with the steel core 2 and then inserted. The upper and lower pile bodies 1 are connected by the steel core 2 and the base 21 in the middle of the steel core 2, and the outer ring is welded to form a whole. This improves the strength of the pile body and the bearing capacity of the pile body.
[0026] Example 2: Refer to Figure 4 The difference from Embodiment 1 is that multiple connecting rods 22 are welded on the base 21. The multiple connecting rods 22 are spaced apart along the circumference of the base 21. Multiple insertion slots 11 are opened on the end face of the pile body 1. The multiple insertion slots 11 correspond to the positions of the multiple connecting rods 22. The connecting rods 22 are inserted into the insertion slots 11. When the pile is welded, the connecting rods 22 are inserted into the insertion slots 11, which can improve the stability of the upper and lower pile bodies 1 and improve the connection strength between adjacent pile bodies 1 after the pile is welded.
[0027] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and modifications made to the above embodiments based on the present utility model without departing from the scope of the present utility model shall fall within the scope of the present utility model.
Claims
1. A type of prestressed concrete pipe pile with double static pressure and steel core, characterized in that: It includes multiple pile sections (1) and a steel core (2) disposed between two adjacent pile sections (1). The steel core (2) is movably inserted into the pile section (1). A base (21) is provided on the steel core (2) and the base (21) is located between two adjacent pile sections (1).
2. The prestressed concrete pipe pile with double static pressure and steel core according to claim 1, characterized in that: The base (21) is flush with the outer surface of the pile (1).
3. The prestressed concrete pipe pile with double static pressure and steel core according to claim 1, characterized in that: The distance between the side wall of the steel core (2) and the inner wall of the pile body (1) is 2-3 mm.
4. The prestressed concrete pipe pile with double static pressure and steel core according to claim 1, characterized in that: The length of the steel core (2) ranges from 180 to 220 mm, and the thickness of the base (21) ranges from 18 to 22 mm.
5. A prestressed concrete pipe pile with double static pressure and steel core according to claim 1, characterized in that: The base (21) and the pile (1) are connected by welding.
6. The prestressed concrete pipe pile with double static pressure and steel core according to claim 1, characterized in that: The outer diameter of the pile body (1) is in the range of 180-200mm, and the inner diameter of the pile body (1) is in the range of 80-100mm.
7. A prestressed concrete pipe pile with double static pressure and steel core according to claim 1, characterized in that: The base (21) is provided with multiple connecting rods (22), and the end face of the pile body (1) is provided with a plug groove (11). The connecting rods (22) are plugged into the plug groove (11).