Structure for improving bearing capacity of grouted core of prefabricated pipe pile
By setting a spiral anchor to the inner wall of the pipe pile and connecting the steel cage, the frictional force form between the inner wall of the pipe pile and the filling core is changed, the bearing capacity of the filling core is improved, the use of steel bars and concrete is reduced, and the problem of insufficient bearing capacity of the PHC pipe pile is solved.
Patent Information
- Application Number
- CN202422467428.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-12
- Publication Date
- 2025-08-15
- Estimated Expiration
- 2034-10-12
AI Technical Summary
In the prior art, when the core filling process is treated after the PHC pipe piles, the static friction between the inner wall of the pipe pile and the concrete is insufficient, resulting in limited bearing capacity of the core filling.
A spiral anchor is provided on the inner wall of the pipe pile, which is anchored to the pipe pile steel cage and extended to the core body, forming an anchor section, changing the frictional force form, and enhancing the bearing capacity of the core.
The bearing capacity of the pipe pile core filling is significantly improved, the use of steel bars and concrete required for core filling is reduced, and the cost is reduced.
Smart Images
Figure CN223226606U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of building construction, in particular to a structure for improving the bearing capacity of the core of a prefabricated pipe pile. Background Art
[0002] After the PHC pipe piles are driven into the ground, they need to be cored to improve the bearing capacity of the pile foundation. This involves cleaning the soil from the pile core, inserting a reinforced cage that has been tied to the core, and pouring concrete. However, because the inner wall of the pile is smooth, even with the cored-in process, the bearing capacity provided by the static friction between the inner wall of the pile and the concrete is still very limited. Utility Model Content
[0003] In order to solve the above problems, a structure for improving the bearing capacity of the grouting core of prefabricated pipe piles is provided. By arranging anchors on the inner wall of the pipe piles, the bearing capacity of the grouting core of the pipe piles is enhanced.
[0004] A structure for improving the bearing capacity of a prefabricated pipe pile core comprises: a pipe pile with a hollow interior and a core body for post-casting within the hollow interior of the pipe pile; a plurality of anchors are arranged on the inner wall of the pipe pile, wherein the first ends of the anchors are anchored to the pile body of the pipe pile, and the second ends of the anchors extend radially inwardly along the pipe pile to form an anchoring section for anchoring to the core body.
[0005] A further improvement of the present invention is that a plurality of the anchoring pieces are spirally arranged on the inner wall of the pipe pile.
[0006] A further improvement of the present invention is that it further comprises a pipe pile reinforcement cage embedded in the pile body of the pipe pile, and the first end of the anchor is fixed to the pipe pile reinforcement cage.
[0007] A further improvement of the present invention is that the pipe pile reinforcement cage includes: a plurality of pipe pile main bars extending axially along the pipe pile, and the plurality of pipe pile main bars are arranged in a circle along the circumference of the pipe pile; pipe pile stirrups tied to the outside of the pipe pile main bars; and the first end of the anchor is fixed to the pipe pile main bars and / or the pipe pile stirrups.
[0008] A further improvement of the present invention is that the core body comprises a cast-in-place steel cage and a concrete structure wrapping the cast-in-place steel cage, and the anchoring section is anchored in the concrete structure.
[0009] A further improvement of the present invention is that the cast-in-place steel cage comprises: a plurality of cast-in-place main bars extending axially along the pipe pile, and the plurality of cast-in-place main bars are arranged in a circle along the circumference of the pipe pile; and cast-in-place stirrups tied to the outside of the cast-in-place main bars.
[0010] A further improvement of the present invention is that the diameter of the annular surface formed by the relative inner ends of all the anchoring pieces is larger than the cross-sectional diameter of the cast-in-place steel cage.
[0011] The utility model changes the original load-bearing mode of the pile core that relies on the friction between the inner wall of the pile and the concrete filling core by arranging anchor pieces on the inner wall of the pile column, thereby significantly improving the bearing capacity of the concrete filling core of the pile. Moreover, after the bearing capacity of the concrete filling core is improved by the structural measures of the present invention, the length of the concrete filling core can be reduced under the condition of the same bearing capacity requirement, thereby reducing the amount of steel bars and concrete required for the concrete filling core, thereby saving costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a perspective view of the internal structure of the pipe pile of the present utility model;
[0013] Figure 2 This is a schematic diagram of the internal structure of the pipe pile of the present utility model;
[0014] Figure 3 for Figure 1 Schematic diagram of the aa section in FIG;
[0015] Figure 4 This is a side view of the pipe pile reinforcement cage of the present utility model;
[0016] Figure 5 This is a three-dimensional diagram of the pipe pile reinforcement cage of the utility model;
[0017] Figure 6 for Figure 4 Schematic diagram of the bb cross section;
[0018] Figure 7 This is a schematic diagram of the cast-core steel cage of the present utility model;
[0019] Figure 8 This is a schematic diagram of the installation of the cast-core steel cage of the present utility model;
[0020] Figure 9 Schematic diagram of dismantling the core reinforced cage of the utility model
[0021] In the figure: 1. Main reinforcement of pipe pile; 2. Hoop reinforcement of pipe pile; 3. End plate of pipe pile; 4. Anchor; 5. Pipe pile; 6. Main reinforcement of grouting core; 7. Hoop reinforcement of grouting core; 8. Grouting core drag plate. DETAILED DESCRIPTION
[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.
[0023] like Figures 1 to 3As shown, a structure for improving the bearing capacity of the core of a prefabricated pipe pile is characterized by comprising: a hollow pipe pile 5 and a core body for post-casting in the hollow of the pipe pile 5; a plurality of anchors 4 are arranged on the inner wall of the pipe pile 5, the first ends of the anchors 4 are anchored to the pile body of the pipe pile 5, and the second ends of the anchors 4 extend radially inward along the pipe pile 5 and form anchor sections for anchoring to the core body.
[0024] like Figures 1 to 3 As shown, a plurality of anchors 4 are arranged in a spiral shape on the inner wall of the pipe pile 5 .
[0025] like Figures 4 and 5 As shown, it also includes a pipe pile reinforcement cage buried in the pile body of the pipe pile 5, and the first end of the anchor 4 is fixed to the pipe pile reinforcement cage.
[0026] like Figures 4-5 As shown, the pipe pile reinforcement cage includes: a plurality of pipe pile main bars 1 extending axially along the pipe pile 5, and the plurality of pipe pile main bars 1 are arranged in a circle along the circumference of the pipe pile; pipe pile stirrups 2 tied to the outside of the pipe pile main bars 1; and the first end of the anchor 4 is fixed to the pipe pile main bars 1 and / or the pipe pile stirrups 2.
[0027] Preferably, in this embodiment, a pipe pile end plate 3 is fixed to the first end of the pipe pile reinforcement cage. The pipe pile end plate 3 is annular, and the inner diameter of the pipe pile end plate 3 is the same as the inner diameter of the pipe column 5 .
[0028] Preferably, if Figures 4 and 5 As shown, in this embodiment, the pipe pile stirrups 2 are spirally arranged around the outside of the pipe pile main reinforcement 1, and the spiral arrangement shape of the pipe pile stirrups 2 is the same as the spiral arrangement shape of the anchors 4, that is, several anchors 4 are fixed on the pipe pile stirrups 2 at intervals.
[0029] like Figure 7 As shown, the core body includes a cast-in-place steel cage and a concrete structure wrapping the cast-in-place steel cage, and the anchoring section is anchored in the concrete structure.
[0030] like Figure 7 As shown, the cast-in-place steel cage includes: a plurality of cast-in-place main bars 6 extending axially along the pipe pile 5, and the plurality of cast-in-place main bars 6 are arranged in a circle along the circumference of the pipe pile 5; and cast-in-place stirrups 7 tied to the outside of the cast-in-place main bars 6.
[0031] Preferably, if Figures 7-9 As shown, in this embodiment, a core-casting support plate 8 is fixed to the second end of the core-casting steel cage.
[0032] Preferably, if Figure 7 As shown, the core-filling stirrups 7 in this embodiment are spirally arranged around the outside of the core-filling main reinforcement 8.
[0033] like Figures 8-9As shown, the diameter of the annular surface formed by the opposite inner ends of all anchoring members 4 is larger than the cross-sectional diameter of the cast-in-core reinforcement cage.
[0034] Preferably, in this embodiment, the cross-sectional diameter of the cast-in-place steel cage is smaller than the inner diameter of the pipe pile 5 minus 2 times the length of the anchor 4 extending out of the inner wall of the pipe pile 5 .
[0035] like Figures 8 and 9 As shown, in this embodiment, when the core-cast steel cage is installed into the pipe column 5, since the anchors 4 are arranged in a spiral shape, the core-cast steel cage's core support plate 8 is rotated into the pipe column 5 along the arrangement shape of the anchors 4 during installation. When removing, the core-cast steel cage only needs to be rotated out from the opposite direction.
[0036] like Figures 1 to 3 As shown, in this embodiment, a plurality of anchors 4 are arranged on the inner wall of the pipe pile 5 in a spiral shape.
[0037] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A structure for improving the bearing capacity of prefabricated pipe pile core filling, characterized in that: include: A hollow pipe pile and a core body for post-casting in the hollow pipe pile; the inner wall of the pipe pile is provided with a plurality of anchors, the first ends of the anchors are anchored to the pile body of the pipe pile, and the second ends of the anchors extend radially inwardly along the pipe pile and form anchor sections for anchoring to the core body.
2. A structure for improving the bearing capacity of prefabricated pipe pile core filling according to claim 1, characterized in that: A plurality of anchoring pieces are arranged in a spiral shape on the inner wall of the pipe pile.
3. A structure for improving the bearing capacity of prefabricated pipe pile core filling according to claim 1, characterized in that: It also includes a pipe pile reinforcement cage buried in the pile body of the pipe pile, and the first end of the anchor is fixed to the pipe pile reinforcement cage.
4. A structure for improving the bearing capacity of prefabricated pipe pile core filling according to claim 3, characterized in that: The pipe pile reinforcement cage includes: a plurality of pipe pile main bars extending along the axial direction of the pipe pile, and the plurality of pipe pile main bars are arranged in a circle along the circumference of the pipe pile; pipe pile stirrups tied to the outside of the pipe pile main bars; and the first end of the anchor is fixed to the pipe pile main bars and / or the pipe pile stirrups.
5. The structure for improving the bearing capacity of prefabricated pipe pile core filling according to claim 1, characterized in that: The core body includes a cast-in-place steel cage and a concrete structure wrapping the cast-in-place steel cage, and the anchoring section is anchored in the concrete structure.
6. A structure for improving the bearing capacity of prefabricated pipe pile core filling according to claim 5, characterized in that: The cast-in-place steel cage includes: a plurality of cast-in-place main bars extending along the axial direction of the pipe pile, and the plurality of cast-in-place main bars are arranged in a circle along the circumference of the pipe pile; and cast-in-place stirrups tied to the outside of the cast-in-place main bars.
7. The structure for improving the bearing capacity of prefabricated pipe pile core filling according to claim 5, characterized in that: The diameter of the annular surface formed by the relative inner ends of all the anchoring pieces is larger than the cross-sectional diameter of the cast-in-place steel cage.