Anti-floating device for muddy soil PHC pipe pile
By designing a fixed part, unfolding plate, and elastic element anti-buoyancy device on the PHC pipe pile, the problem of pipe pile floating in silty soil was solved, and the stability and safety of the pile foundation were improved.
Patent Information
- Application Number
- CN202422812028.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-19
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-11-19
AI Technical Summary
PHC pipe piles are prone to floating in silty soil, which affects the verticality and bearing capacity of the pile foundation, and traditional methods cannot completely avoid this phenomenon.
Design an anti-buoyancy device including a fixing part, a deployable plate and an elastic element. The deployable plate unfolds under the action of the elastic element to form a resistance surface to resist the buoyancy of the silt. The unfolding angle is limited by the limiting part and fixed on the PHC pipe pile.
It effectively prevents PHC pipe piles from floating, improves the stability and safety of the pile foundation, and has a compact structure and is easy to install.
Smart Images
Figure CN223647102U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building construction, and in particular to a device for preventing the floating of PHC pipe piles in silty soil. Background Technology
[0002] In the fields of civil engineering and infrastructure construction, PHC (prestressed high-strength concrete) pipe piles are widely used in pile foundation projects under various geological conditions due to their excellent bearing capacity and ease of construction. However, in special geological conditions such as silty soil, the construction of PHC pipe piles faces many challenges, one of the most significant problems being the floating phenomenon of the pipe piles.
[0003] Silty soil is characterized by high water content, high compressibility, and low bearing capacity. When PHC pipe piles are driven into silty soil layers by hammering or pressing, the high fluidity of the silt surrounding the pile easily creates a "water plug effect" at the bottom of the pile, causing it to experience upward buoyancy. This upward buoyancy is particularly pronounced in the period following pile driving, as the silt gradually solidifies and the pore water pressure around the pile dissipates. This upward buoyancy not only affects the verticality and bearing capacity of the pile foundation but can also, in severe cases, pose a safety hazard to the entire engineering structure.
[0004] To address the issue of PHC pipe piles floating in silty soil, traditional methods rely heavily on strict control during construction, such as optimizing the pile driving sequence, controlling the pile driving rate, and using preloading. However, these methods often have limited effectiveness and cannot completely prevent floating. Therefore, developing a device that can actively resist the buoyancy of silt and effectively prevent PHC pipe piles from floating is of paramount importance. Utility Model Content
[0005] The purpose of this utility model is to provide a device for preventing the floating of PHC pipe piles in silty soil, which is used to actively resist the buoyancy of silt and effectively prevent the PHC pipe piles from floating.
[0006] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a silty soil PHC pipe pile anti-buoyancy device, the silty soil PHC pipe pile anti-buoyancy device comprising:
[0007] The fixing part is sleeved and fixed on the PHC pipe pile;
[0008] An unfolding plate, the bottom of which is hinged to the fixing part, and the fixing part is also provided with a limiting part to restrict the unfolding angle of the unfolding plate;
[0009] An elastic element is disposed between the unfolding plate and the PHC pipe pile, and the elastic element is in a compressed state.
[0010] In one embodiment, the fixing part includes:
[0011] The left half-hoop has connecting ears extending outward at both ends;
[0012] The right half hoop also has connecting ears at both ends, and the connecting ears of the left half hoop and the connecting ears of the right half hoop are connected by bolts.
[0013] The unfolding plate is hinged to the connecting lugs of the left half hoop and the right half hoop, and the hinge point of the unfolding plate is located inside the bolt, and the limiting part is the bolt.
[0014] In one embodiment, the left half-hoop, the right half-hoop, and the connecting lug are all wedge-shaped structures that are narrow at the bottom and wide at the top.
[0015] In one embodiment, both the fixing part and the unfolding plate are made of high-strength rust-resistant metal.
[0016] In one embodiment, the lower surface of the unfolding plate is provided with reinforcing ribs.
[0017] In one embodiment, an anti-slip pad is provided between the fixing part and the PHC pipe pile.
[0018] The above-described technical solutions in the embodiments of this utility model have at least the following technical effects or advantages:
[0019] The anti-buoyancy device for PHC pipe piles in silty soil provided in this embodiment of the invention can automatically respond to the buoyancy force that the pipe pile may experience after it is driven into the silty soil. The unfolding plate unfolds in a timely manner under the action of the elastic element, and its unfolding angle is limited by the limiting part, thereby forming a stable resistance surface around the pipe pile, effectively resisting the buoyancy of the silt and preventing the pipe pile from floating. Furthermore, the anti-buoyancy device for PHC pipe piles in silty soil provided in this application has a compact structure and is easy to install. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 A schematic diagram of the structure of the anti-floating device for PHC pipe piles in silty soil provided in this embodiment of the utility model before the pipe pile is driven into the silty soil.
[0022] Figure 2for Figure 1 A schematic diagram of the fixing part in the middle;
[0023] Figure 3 A schematic diagram of the structure of the anti-floating device for PHC pipe piles in silty soil provided in this embodiment of the utility model when the pipe pile is driven into the silty soil.
[0024] Figure 4 A schematic diagram of the structure of the anti-floating device for silty soil PHC pipe piles provided in this embodiment of the utility model when resisting the floating of the pipe piles.
[0025] The labels for the various figures are as follows:
[0026] 1. Fixing part; 2. Unfolding plate; 3. Elastic element; 4. PHC pipe pile; 5. Silt soil; 11. Connecting lug; 12. Limiting part. Detailed Implementation
[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.
[0028] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0031] Please see Figures 1 to 4 This application provides an anti-floating device for 5PHC pipe piles in silty soil, including a fixing part 1, an unfolding plate 2, and an elastic element 3. The fixing part 1 is sleeved and fixed to the PHC pipe pile 4; the bottom of the unfolding plate 2 is hinged to the fixing part 1, and the fixing part 1 is also provided with a limiting part 12 to restrict the unfolding angle of the unfolding plate 2; the elastic element 3 is disposed between the unfolding plate 2 and the PHC pipe pile 4, and the elastic element 3 is in a compressed state.
[0032] Before driving the pile, an anti-buoyancy device is installed on the PHC pipe pile 4, and then a static pressure machine is used to press the PHC pipe pile 4 into the silty soil 5 (e.g., Figure 1-2 As shown), when the anti-buoyancy device is pressed down to the surface of the silty soil 5, the tightening force provided by the silt will cause the unfolding plate 2 to overcome the elastic force of the elastic element 3 (such as a spring or other structure) and tighten (as shown). Figure 3 As shown in the diagram, this reduces the additional resistance generated by the anti-buoyancy device during the lowering of the PHC pipe pile 4, facilitating the lowering process. Once the PHC pipe pile 4 reaches the designated depth, when it rises due to the buoyancy of the silt, the unfolding plate 2, under the action of the elastic element 3 and the rising motion of the PHC pipe pile 4, will unfold to both sides until the outer side of the unfolding plate 2 abuts against the limiting part 12. This generates resistance through the unfolding plate 2, preventing the PHC pipe pile 4 from continuing to rise. Furthermore, the fixing part 1, which is sleeved and fixed to the PHC pipe pile 4, also plays a role in preventing the PHC pipe pile 4 from rising.
[0033] Optionally, multiple anti-buoyancy devices can be installed on a single PHC pipe pile 4 to significantly improve the performance of the PHC pipe pile 4 in resisting the buoyancy of silt.
[0034] In one embodiment, the fixing part 1 includes a left half hoop and a right half hoop, wherein the two ends of the left half hoop are provided with connecting ears 11 extending outward; the two ends of the right half hoop are also provided with connecting ears 11, and the connecting ears 11 of the left half hoop and the connecting ears 11 of the right half hoop are connected by bolts; the unfolding plate 2 is hinged to the connecting ears 11 of the left half hoop and the right half hoop, and the hinge point of the unfolding plate 2 is located inside the bolt, and the limiting part 12 is a bolt.
[0035] By using bolts to fix the left and right halves of the hoop to the PHC pipe pile 4, the installation of the installation part is both convenient and secure. In addition, by setting the hinge of the unfolding plate 2 inside the bolt, the bolt can not only connect and fix the left and right halves of the hoop (fixing the fixing part 1 to the PHC pipe pile 4), but also act as a limiting part 12. When the unfolding plate 2 unfolds to abut against the bolt, the bolt can restrict the unfolding plate 2 from continuing to unfold. Therefore, when the PHC pipe pile 4 has an upward tendency, the silt resistance acting on the unfolding plate 2 can be transmitted to the left and right halves of the hoop through the bolt, and then to the PHC pipe pile 4, so as to achieve the purpose of preventing the PHC pipe pile 4 from floating.
[0036] In one embodiment, the left and right halves of the hoop and the connecting lug 11 are all wedge-shaped structures that are narrow at the bottom and wide at the top. When the PHC pipe pile 4 is being driven, the bottom of the left and right halves of the hoop and the connecting lug 11 can better break through the silty soil 5, reducing the resistance experienced by the fixing part 1 during pile driving, thereby reducing the resistance of the PHC pipe pile 4 during pile driving.
[0037] In one embodiment, both the fixing part 1 and the unfolding plate 2 are made of high-strength, rust-resistant metal (specifically, aluminum alloy or stainless steel, etc.). The application of rust-resistant metal effectively prevents the device from rusting in the humid, highly corrosive silty soil 5 environment, maintaining the stability and reliability of the device. Furthermore, the use of high-strength materials ensures that the device is not easily deformed or damaged when subjected to the buoyancy of the pipe pile, improving the load-bearing capacity and safety of the device.
[0038] In one embodiment, the lower surface of the unfolding plate 2 is provided with reinforcing ribs. The reinforcing ribs increase the rigidity and strength of the lower surface of the unfolding plate 2, making it more stable during unfolding and less prone to bending or breakage. When the unfolding plate 2 is subjected to the resistance of silt, the reinforcing ribs can effectively disperse stress, reduce the deformation of the unfolding plate 2, and maintain the integrity of its shape and function.
[0039] In one embodiment, an anti-slip pad is provided between the fixing part 1 and the PHC pipe pile 4. Specifically, the anti-slip pad can be made of rubber or a polymer composite material. The addition of the anti-slip pad increases the friction between the fixing part 1 and the PHC pipe pile 4, allowing the device to be more firmly fixed to the pipe pile and preventing the fixing part 1 from slipping or falling off. In addition, by adjusting the thickness and shape of the anti-slip pad, it can accommodate PHC pipe piles 4 with different diameters and surface roughnesses, improving the versatility and flexibility of the device.
[0040] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A device for preventing the floating of PHC pipe piles in silty soil, characterized in that, The anti-buoyancy device for the silty soil PHC pipe pile includes: The fixing part is sleeved and fixed on the PHC pipe pile; An unfolding plate, the bottom of which is hinged to the fixing part, and the fixing part is also provided with a limiting part to restrict the unfolding angle of the unfolding plate; An elastic element is disposed between the unfolding plate and the PHC pipe pile, and the elastic element is in a compressed state.
2. The anti-floating device for PHC pipe piles in silty soil according to claim 1, characterized in that, The fixing part includes: The left half-hoop has connecting ears extending outward at both ends; The right half hoop also has connecting ears at both ends, and the connecting ears of the left half hoop and the connecting ears of the right half hoop are connected by bolts. The unfolding plate is hinged to the connecting lugs of the left half hoop and the right half hoop, and the hinge point of the unfolding plate is located inside the bolt, and the limiting part is the bolt.
3. The anti-floating device for PHC pipe piles in silty soil according to claim 2, characterized in that: The left half-hoop, the right half-hoop, and the connecting lug are all wedge-shaped structures that are narrow at the bottom and wide at the top.
4. The anti-floating device for PHC pipe piles in silty soil according to claim 1, characterized in that: Both the fixing part and the unfolding plate are made of high-strength rust-resistant metal.
5. The anti-floating device for PHC pipe piles in silty soil according to claim 1, characterized in that: The lower surface of the unfolding plate is provided with reinforcing ribs.
6. The anti-floating device for PHC pipe piles in silty soil according to claim 1, characterized in that: An anti-slip pad is provided between the fixing part and the PHC pipe pile.