Bridge pile foundation reinforcing structure
By setting up static pressure piles and reinforcement columns around the bridge pile foundation and using a self-stressed reinforcement ring to fix the pile foundation, the problem of poor reinforcement effect of existing bridge pile foundations is solved, and efficient and low-cost pile foundation reinforcement effect is achieved.
Patent Information
- Application Number
- CN202422759303.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-13
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-11-13
AI Technical Summary
The existing bridge pile foundation reinforcement methods have problems such as limited reinforcement effect, large material usage and high cost.
A bridge pile foundation reinforcement structure is adopted with static press piles and reinforced columns. By setting up four anchor static press piles around the pile foundation to be reinforced, the reinforcement columns are fixed on the anchor static press piles, and a self-stress reinforcement ring is used to fix the reinforcement to be reinforced, so as to achieve reinforcement.
It has achieved stable support for bridge pile foundations and has the advantages of good reinforcement stability, low cost and high construction efficiency.
Smart Images
Figure CN223088473U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a bridge pile foundation reinforcement structure, and more specifically, to a bridge pile foundation reinforcement structure adopting static pressure piles and reinforcement columns. Background Art
[0002] With the rapid development of China's economy, there is more and more heavy traffic. The bearing capacity of many bridge pile foundations built in the early stage cannot meet the requirements of the new standards, which requires reinforcement and upgrading of the pile foundation structure. The usual method is to implant steel bars in the reinforced pile foundation, and then pour a concrete cap around the implanted steel bars. This results in limited reinforcement effect, and the concrete cap of this reinforcement structure is made relatively thick. Otherwise, it is not easy to closely combine the cap and the reinforced pile foundation, so more materials are used and the reinforcement cost is also relatively high. Therefore, the utility model proposes a bridge pile foundation reinforcement structure adopting static pressure piles and reinforcement columns. Summary of the Invention
[0003] The utility model provides a bridge pile foundation reinforcement structure in order to overcome the above technical problems.
[0004] The bridge pile foundation reinforcement structure of the utility model includes anchor static pressure piles, reinforcement columns and self-stress reinforcement rings. The pile foundation to be reinforced is placed between the original ground. The number of both the anchor static pressure piles and the reinforcement columns is four. Its characteristics are as follows: The four anchor static pressure piles are evenly arranged in the original ground around the pile foundation to be reinforced. The upper end of each anchor static pressure pile is fixed with a reinforcement column. The reinforcement column is fixedly connected with the pile foundation to be reinforced through a self-stress reinforcement ring. Reinforcement column anchor bars inserted into the self-stress reinforcement ring and the pile foundation to be reinforced are arranged in the reinforcement column, and self-stress reinforcement ring anchor bars inserted into the pile foundation to be reinforced are arranged in the self-stress reinforcement ring.
[0005] For the bridge pile foundation reinforcement structure of the utility model, the reinforcement column is composed of reinforcement column concrete, and reinforcement column structural bars and reinforcement column anchor bars cast therein.
[0006] For the bridge pile foundation reinforcement structure of the utility model, the self-stress reinforcement ring is composed of high-expansion concrete, and circular steel bars, self-stress reinforcement ring longitudinal bars and self-stress reinforcement ring anchor bars cast therein.
[0007] For the bridge pile foundation reinforcement structure of the utility model, the anchor static pressure pile is a steel pipe pile. Anchor static pressure pile anchor bars are evenly welded on the inner wall of the upper end of the anchor static pressure pile. Anchor static pressure pile top concrete is cast at the upper end of the anchor static pressure pile. The upper end of the anchor static pressure pile anchor bar extends into the reinforcement column, and the lower end is cast in the anchor static pressure pile top concrete.
[0008] The bridge pile foundation reinforcement structure of the present utility model, wherein the anchor jacked pile is spliced by multiple steel pipe piles, the length of each steel pipe pile is 2m - 4m, the length that the top end of the anchor jacked pile extends into the reinforcement column is 5cm - 10cm, and the length that the anchor reinforcement of the anchor jacked pile extends into the reinforcement column is not less than 30 times its own diameter.
[0009] The bridge pile foundation reinforcement structure of the present utility model, wherein the length that the reinforcement column anchor reinforcement extends into the pile foundation to be reinforced is not less than 10 times its own diameter, and the length that the self-stressing reinforcement ring anchor reinforcement extends into the pile foundation to be reinforced is not less than 10 times its own diameter.
[0010] The bridge pile foundation reinforcement structure of the present utility model, wherein the concrete with a thickness of 1cm - 2cm is chiseled off at the part of the outer surface of the pile foundation to be reinforced corresponding to the self-stressing reinforcement ring.
[0011] The beneficial effects of the present utility model are as follows: In the bridge pile foundation reinforcement structure of the present utility model, four anchor jacked piles are evenly arranged in the original ground around the pile foundation to be reinforced. The top of the anchor jacked pile is fixed to the reinforcement column, and the reinforcement column is fixedly connected to the pile foundation to be reinforced through the self-stressing reinforcement ring. It can be seen that the anchor jacked pile pressed into the ground below serves as the reinforcement foundation, and then the reinforcement column of the reinforced concrete structure is fixed at its upper end, and the reinforcement column and the self-stressing reinforcement ring of the reinforced concrete structure are fixedly connected to the pile foundation to be reinforced. Moreover, the reinforcement column anchor reinforcement and the self-stressing reinforcement ring anchor reinforcement are both implanted into the pile foundation to be reinforced. In this way, under the combined action of the anchor jacked pile, the reinforcement column and the self-stressing reinforcement ring, the stable support for the pile foundation to be reinforced is realized. Due to the existence of the circumferential self-stress in the self-stressing reinforcement ring, the self-stressing reinforcement ring is firmly combined with the reinforced pile foundation, and the bridge pile foundation whose existing bearing capacity does not meet the new standard requirements can be reinforced, which has the advantages of good reinforcement stability, low cost and high construction efficiency. Description of the Drawings
[0012] Figure 1 is the front view of the bridge pile foundation reinforcement structure of the present utility model;
[0013] Figure 2 is the top view of the bridge pile foundation reinforcement structure of the present utility model.
[0014] In the figure: 1 pile foundation to be reinforced, 2 anchor jacked pile, 3 reinforcement column, 4 self-stressing reinforcement ring, 5 pier column, 6 original ground, 7 reinforcement column structural reinforcement, 8 reinforcement column anchor reinforcement, 9 self-stressing reinforcement ring anchor reinforcement, 10 self-stressing reinforcement ring longitudinal reinforcement, 11 circular reinforcement, 12 high-expansion concrete, 13 concrete at the top end of the anchor jacked pile, 14 anchor reinforcement of the anchor jacked pile, 15 reinforcement column concrete. Detailed Implementation Modes
[0015] The present utility model will be further described below in conjunction with the drawings and embodiments.
[0016] As Figure 1 and Figure 2 shown, the front view and top view of the bridge pile foundation reinforcement structure of the present utility model are respectively given. The bridge pile foundation reinforcement structure of the present utility model is composed of anchor jacked piles 2, reinforcement columns 3 and self-stressing reinforcement rings 4. The pile foundation 1 to be reinforced is arranged in the foundation of the original ground 6, and the upper part of the pile foundation 1 to be reinforced is the pier column 5. The number of both the anchor jacked piles 2 and the reinforcement columns 3 is four. The four anchor jacked piles 2 are evenly arranged under the original ground 6 around the pile foundation 1 to be reinforced. The four reinforcement columns 3 are respectively fixed to the upper ends of the four anchor jacked piles 2. The self-stressing reinforcement ring 4 is located between the four reinforcement columns 3 and the pile foundation 1 to be reinforced. The reinforcement column 3 is fixedly connected to the pile foundation 1 to be reinforced through the self-stressing reinforcement ring 4. In this way, the pile foundation 1 to be reinforced, the anchor jacked piles 2 and the reinforcement columns 3 jointly realize the reinforcement of the pile foundation 1 to be reinforced.
[0017] As shown, the anchor jacked piles 2 are pressed into the original ground 6 under the pile foundation 1 to be reinforced as the foundation for reinforcement. The reinforcement column 3 is a reinforced concrete structure and is fixed to the upper end of the anchor jacked pile 2. The shown reinforcement column 3 is composed of reinforcement column concrete 15, reinforcement column structural bars 7 and reinforcement column anchoring bars 8 cast in the reinforcement concrete 15. The outer ends of the reinforcement column anchoring bars 8 are not only cast in the reinforcement column 3, but also the reinforcement column anchoring bars 8 pass through the self-stressing reinforcement ring 4 and extend into the pile foundation 1 to be reinforced.
[0018] The shown self-stressing reinforcement ring 4 is located between the four reinforcement columns 3 and the pile foundation 1 to be reinforced. The self-stressing reinforcement ring 4 is composed of high-expansion concrete 12, ring-shaped steel bars 11 and self-stressing reinforcement ring longitudinal bars 10 cast in the high-expansion concrete 12. The ring-shaped steel bars 11 are arranged in the middle of the annular high-expansion concrete 12. The self-stressing reinforcement ring longitudinal bars 10 are arranged vertically and are tied to the ring-shaped steel bars 11 and then cast in the high-expansion concrete 12. The self-stressing reinforcement ring longitudinal bars 10 are not only anchored in the self-stressing reinforcement ring 4, but also the inner ends of the self-stressing reinforcement ring longitudinal bars 10 are implanted into the pile foundation 1 to be reinforced.
[0019] It can be seen that the anchor jacked piles 2 driven into the foundation under the original ground 6 serve as the foundation for reinforcement, and rely on the stability of the reinforcement columns 3 and the self-stressing reinforcement rings 4 of the concrete structure to achieve the reinforcement and support of the pile foundation 1 to be reinforced; at the same time, due to the lateral expansion effect of the high-expansion concrete 12 in the self-stressing reinforcement ring 4, there is a circumferential self-stress in the self-stressing reinforcement ring 4, which further makes the self-stressing reinforcement ring 4 firmly combined with the pile foundation 1 to be reinforced, ensuring the firmness of the reinforcement of the pile foundation 1 to be reinforced. Therefore, it is not necessary to design a large-volume cap structure for the bridge pile foundation reinforcement structure of the present utility model, reducing the materials required for the reinforcement structure, thereby saving the project cost.
[0020] The anchor-pressed pile 2 shown is a steel pipe pile. In order to achieve a firm connection between the anchor-pressed pile 2 and the reinforced column 3, anchor-pressed pile anchoring bars 14 are evenly welded on the inner wall at the upper end of the anchor-pressed pile 2. At the upper end of the inner cavity of the anchor-pressed pile 2, anchor-pressed pile top concrete 13 is poured, so that the anchor-pressed pile anchoring bars 14 are poured in the anchor-pressed pile top concrete 13. At the same time, the upper end of the anchor-pressed pile 2 and the upper end of the anchor-pressed pile anchoring bars 14 are both inserted into the reinforced column 3. In this way, a firm connection between the anchor-pressed pile 2 and the reinforced column 3 is achieved.
[0021] Among them, the anchor-pressed pile 2 is composed of multiple sections of steel pipe piles spliced together. The length of each section of the steel pipe pile is 2m to 4m. The length of the upper end of the anchor-pressed pile 2 extending into the reinforced column 3 is 5cm to 10cm. The length of the anchor-pressed pile anchoring bars 14 extending into the reinforced column 3 is not less than 30 times the diameter of the anchor-pressed pile anchoring bars 14. In order to ensure that the self-stressing reinforcement ring 4 generates sufficient circumferential self-stress, the high-expansion concrete 12 that constitutes the self-stressing reinforcement ring 4 is formed by adding a high-efficiency expansion agent to the concrete, and the content of the high-efficiency expansion agent is 8% - 12%.
[0022] The length of the reinforced column anchoring bars 8 extending into the pile foundation to be reinforced 1 is not less than 10 times the diameter of the pile foundation to be reinforced 1. The length of the self-stressing reinforcement ring anchoring bars 9 extending into the pile foundation to be reinforced 1 is not less than 10 times its own diameter. At the part of the outer surface of the pile foundation to be reinforced 1 corresponding to the self-stressing reinforcement ring 4, the concrete with a thickness of 1cm to 2cm is chiseled off. The surface of the pile foundation to be reinforced 1 after chiseling is a rough surface to facilitate the combination with the self-stressing reinforcement ring 4.
[0023] During the construction process, first, the anchor-pressed pile 2 is driven in. Then, the part of the pile foundation to be reinforced 1 and the self-stressing reinforcement ring 4 is roughened by chiseling, and the self-stressing reinforcement ring anchoring bars 9 and the reinforced column anchoring bars 8 are implanted. Then, the binding of the reinforced column structural bars 7, the self-stressing reinforcement ring longitudinal bars 10, and the ring-shaped steel bars 11 is carried out. Then, the pouring of the reinforced column 3 and the self-stressing reinforcement ring 4 is carried out in sequence.
Claims
1. A bridge pile foundation reinforcement structure, comprising anchor static pressure piles (2), reinforcement columns (3) and self-stress reinforcement rings (4), with the pile foundation to be reinforced (1) placed between the original ground (6), and both the number of anchor static pressure piles and reinforcement columns being four; characterized in that: Four anchor static pressure piles are uniformly arranged in the original ground around the pile foundation to be strengthened. A strengthening column is fixed at the upper end of each anchor static pressure pile. The strengthening column is fixedly connected to the pile foundation to be strengthened through a self-stress strengthening ring. A strengthening column anchor bar (8) inserted into the self-stress strengthening ring and the pile foundation to be strengthened is arranged in the strengthening column. A self-stress strengthening ring anchor bar (9) inserted into the pile foundation to be strengthened is arranged in the self-stress strengthening ring.
2. The bridge pile foundation reinforcement structure according to claim 1, wherein: The strengthening column (3) is composed of strengthening column concrete (15), strengthening column structural bars (7) and strengthening column anchor bars (8) cast therein.
3. The bridge pile foundation reinforcement structure according to claim 1 or 2, characterized in that: The self-stress strengthening ring (4) is composed of high-expansion concrete (12), circular steel bars (11), self-stress strengthening ring longitudinal bars (10) and self-stress strengthening ring anchor bars (9) cast therein.
4. The bridge pile foundation reinforcement structure according to claim 1 or 2, characterized in that: The anchor static pressure pile (2) is a steel pipe pile. Anchor static pressure pile anchor bars (14) are uniformly welded on the inner wall of the upper end of the anchor static pressure pile. Anchor static pressure pile top concrete (13) is cast at the upper end of the anchor static pressure pile. The upper ends of the anchor static pressure pile anchor bars extend into the strengthening column (3), and the lower ends are cast in the anchor static pressure pile top concrete.
5. The bridge pile foundation reinforcement structure according to claim 4, characterized in that: The anchor static pressure pile (2) is spliced by multiple sections of steel pipe piles. The length of each section of steel pipe pile is 2m to 4m. The length of the upper end of the anchor static pressure pile extending into the strengthening column (3) is 5cm to 10cm. The length of the anchor static pressure pile anchor bar extending into the strengthening column is not less than 30 times its own diameter.
6. The bridge pile foundation reinforcement structure according to claim 1 or 2, characterized in that: The length of the strengthening column anchor bar (8) extending into the pile foundation to be strengthened (1) is not less than 10 times its own diameter. The length of the self-stress strengthening ring anchor bar (9) extending into the pile foundation to be strengthened is not less than 10 times its own diameter.
7. The bridge pile foundation reinforcement structure according to claim 1 or 2, characterized in that: Concrete with a thickness of 1cm to 2cm is chiseled off at the part of the outer surface of the pile foundation to be strengthened (1) corresponding to the self-stress strengthening ring (4).